WO2019140376A1 - Ruban de refermeture d'emballage souple - Google Patents

Ruban de refermeture d'emballage souple Download PDF

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Publication number
WO2019140376A1
WO2019140376A1 PCT/US2019/013474 US2019013474W WO2019140376A1 WO 2019140376 A1 WO2019140376 A1 WO 2019140376A1 US 2019013474 W US2019013474 W US 2019013474W WO 2019140376 A1 WO2019140376 A1 WO 2019140376A1
Authority
WO
WIPO (PCT)
Prior art keywords
adhesive
layer
reseal
less
adhesive tape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2019/013474
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English (en)
Inventor
Mitchell J. Rackovan
Zuchen Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Avery Dennison Corp
Original Assignee
Avery Dennison Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avery Dennison Corp filed Critical Avery Dennison Corp
Publication of WO2019140376A1 publication Critical patent/WO2019140376A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5855—Peelable seals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/202—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive being in the form of fibres
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/204—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive coating being discontinuous
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2421/00—Presence of unspecified rubber

Definitions

  • the present disclosure relates generally to adhesive tapes and, in particular, to improved adhesive tapes that include an exterior porous detackifying layer and an underlying reseal adhesive layer.
  • a wide array of resealable containers are known.
  • a container such as a flexible bag or rigid walled housing, is provided with an opening that serves to provide access to the interior of the container.
  • a lid or cover is positioned over the opening and bonded to the container, typically by heat sealing, to enclose and seal the container interior and its contents from the external environment.
  • a portion of the flexible wall of the bag may serve as the cover and be folded or otherwise positioned over an opening in the bag.
  • a reseal feature enables the lid or cover, or a portion thereof, to be removed or otherwise repositioned so as to allow access to the interior of the container.
  • the lid or cover After accessing the interior of the container, the lid or cover can be appropriately positioned over the opening and engaged with the container to thereby reseal the container.
  • Numerous strategies have been devised for a lid or cover to seal (and reseal) the interior of a container from the outside environment.
  • An example of a sealing strategy is the provision of corresponding, e.g. male and female, (mechanical) engagement structures on the respective contacting surfaces of the container and lid.
  • Another example is the use of a layer of a pressure sensitive adhesive on the contacting surfaces of the lid or cover, and/or the corresponding region of the container extending about the periphery of the opening. This latter strategy is widely used, particularly for disposable packaging as used for storing and preserving perishable items, such as food, in which it is desirable to minimize exposure to air.
  • the disclosure relates to an adhesive tape comprising a porous detackifying layer defining spaces therein.
  • the detackifying layer comprises a heat-activated hot melt adhesive.
  • the detackifying layer has a porosity ranging from 10% to 50%.
  • the detackifying layer comprises fibers having an average diameter of less than 100 microns.
  • the detackifying layer has a coat weight of less than 15 gsm.
  • the detackifying layer has a thickness of less than 2 mil.
  • the adhesive tape further comprises an anchorage adhesive layer, and a reseal adhesive layer, wherein at least a portion of the reseal adhesive layer is disposed between the detackifying layer and the anchorage adhesive layer.
  • the reseal adhesive layer and the anchorage adhesive layer each independently comprise a pressure sensitive adhesive.
  • the ratio of the reseal pressure sensitive adhesive peel strength to the anchorage pressure sensitive adhesive peel strength is less than 1.
  • the ratio of the detackifying layer coat weight to the reseal adhesive layer coat weight is less than 1.
  • the ratio of the detackifying layer thickness to the reseal adhesive layer thickness is less than 1.
  • the adhesive tape further comprises a support layer, at least a portion of which is disposed between the anchorage adhesive layer and the reseal adhesive layer.
  • the disclosure relates to a method for producing an adhesive tape.
  • the method comprises providing a multilayer film comprising a support layer and an anchorage adhesive layer.
  • the multilayer film comprises a heat seal layer or a release liner, wherein at least a portion of the anchorage adhesive layer is disposed between the support layer and the heat seal layer or release liner.
  • the method further comprises spray coating a pressure sensitive adhesive onto a face of the multilayer film, thereby generating a reseal adhesive layer such that at least a portion of the support layer is disposed between the reseal adhesive layer and the anchorage adhesive layer.
  • the method further comprises spray coating a heat-activated hot melt adhesive onto the reseal adhesive layer, thereby generating a porous detackifying layer defining spaces therein.
  • the spray coating of the heat-activated hot melt adhesive comprises fiberizing the heat-activated hot melt adhesive.
  • the disclosure relates to a reclosable article.
  • the reclosable article comprises a first surface adhered to a first adhesive tape, and a second surface adhered to a second adhesive tape.
  • the first adhesive tape and the second adhesive tape are each independently an adhesive tape of any of the provided embodiments.
  • At least a portion of the reseal adhesive layer of the first adhesive tape releasably adheres to the reseal adhesive layer of the second adhesive tape.
  • the reclosable article defines an interior cavity.
  • the reclosable article is a flexible pouch or bag.
  • FIG. 1 illustrates a cross section of an adhesive tape having a porous detackifying layer, a reseal adhesive layer, an anchorage adhesive layer, and a heat seal layer, in accordance with an embodiment.
  • FIG. 2 illustrates an adhesive tape having a porous detackifying layer, a reseal adhesive layer, an anchorage adhesive layer, and a release liner, in accordance with an embodiment.
  • the present disclosure generally relates to adhesive tapes and resealable articles using such adhesive tapes that, when employed, provide advantageous improvements in resealing by, inter alia, reducing the exposure of the adhesive tape reseal adhesive to undesirable elements.
  • a resealable adhesive product it is beneficial for a resealable adhesive product to be configured so as to limit the interaction of the adhesive with components of a resealable article, package, or container. Such interactions can have negative effects on the package, its contents, and the adhesive itself.
  • exposure of the adhesive to undesirable particles present in the environment, e.g., dust or lint may adversely affect the adhesive properties of the adhesive, thus affecting the ability to effectively reseal.
  • multilayer adhesive tapes can be assembled in such a way as to advantageously position a reseal adhesive layer underneath a porous detackifying layer, e.g., a permeable top layer.
  • the reseal adhesive can have a reduced exposure when not being used to seal a package, but can be exposed through the detackifying layer when used for sealing, e.g., through light pressure.
  • the porous detackifying layer to the reseal adhesive layer, the reseal adhesive is generally accessible only when the detackifying layer and reseal adhesive layer are squeezed together with, for example, typical finger pressure.
  • a porous detackifying layer comprising fibers and void spaces can be constructed above the reseal adhesive layer.
  • the provided adhesive tapes provide the added advantages of lower manufacturing costs associated with smaller adhesive layer coat weights and thicknesses, and good compatibility with existing conventional tape affixing equipment and practices.
  • an adhesive tape is disclosed.
  • the adhesive tape comprises a
  • (porous) detackifying layer a reseal adhesive layer, and an anchorage adhesive layer.
  • the layers of the adhesive tape are arranged such that at least a portion of the reseal adhesive layer is disposed between the detackifying layer and the anchorage adhesive layer.
  • the detackifying layer, the reseal adhesive layer, and the anchorage adhesive layer are coextensive with one another.
  • other layers may also be included, and the reseal adhesive layer may not necessarily be in direct contact with the other layers.
  • the term “coextensive” refers to a relationship between two or more layers such that the surface areas of adjacent or parallel faces of the layers are aligned with one another with little or no overhang (of at least one of the areas or layers). In some cases, the extents of the areas or faces are within 90% of one another. For example, two or more layers are coextensive if the surface areas of adjacent or parallel faces of the layers are within 90%, within 92%, within 94%, within 96%, or within 98% of one another. The term “coextensive” can also refer to a relationship between two or more layers such that the lengths of the layers are within 90% of one another.
  • two or more layers are coextensive if the lengths of the layers are within 90%, within 92%, within 94%, within 96%, or within 98% of one another.
  • coextensive can also refer to a relationship between two or more layers such that the widths of the layers are within 90% of one another.
  • two or more layers are coextensive if the widths of the layers are within 90%, within 92%, within 94%, within 96%, or within 98% of one another.
  • the reseal adhesive layer can be directly adjacent to the detackifying layer, and the detackifying layer can be configured to be capable of allowing at least a portion of the reseal adhesive layer to flow within and/or through the detackifying layer when pressure is applied, e.g., to the detackifying layer.
  • the pressure acts to force at least some of the adhesive within the reseal adhesive layer to travel through spaces within the porous detackifying layer.
  • squeezing or pressing the tape can, for example, provide exposure or increase the exposure of the reseal adhesive of one adhesive tape to a substrate, e.g., the reseal adhesive of an adjacent adhesive tape.
  • the porous detackifying layer of the adhesive tape serves as a permeable or semi- permeable barrier to the reseal adhesive, providing the adhesive tape with a low tack external surface or face (in the absence of pressure or squeezing).
  • the detackifying layer may define spaces therein, e.g., the detackifying layer may include open space in the layer itself.
  • the porous detackifying layer can have a configuration that includes a dispersion of channels defining spaces within the layer. The degree to which the detackifying layer is composed of these spaces can be measured as a porosity value.
  • porosity refers to the measure of space, e.g., open space or void space, in a material, and is represented as a percentage of the volume of voids in the total volume of the material.
  • a material with 0% porosity has no voids and a material with a porosity of 30%, for example, has one or more void spaces comprising 30% of the total volume of the material.
  • the porosity of the detackifying layer of the adhesive tape can, for example, range from 0.5% to 50%, e.g., from 10% to 30%, from 10% to 22%, from 12% to 24%, from 14% to 26%, from 16% to 28%, or from 18% to 30%.
  • the detackifying layer porosity can be less than 30%, e.g., less than 28%, less than 26%, less than 24%, less than 22%, less than 20%, less than 18%, less than 16%, less than 14%, or less than 12%.
  • the detackifying layer porosity can be greater than 10%, e.g., greater than 12%, greater than 14%, greater than 16%, greater than 18%, greater than 20%, greater than 22%, greater than 24%, greater than 26%, or greater than 28%.
  • the porous nature of the detackifying layer is the result of a network of fibers that make up the porous detackifying layer.
  • the detackifying layer can comprise a configuration of intersecting and interconnected fibers that are separated from one another by void regions responsible for the detackifying layer porosity. Because the layer porosity can depend at least in part on the sizes and packing densities of constituent fibers, the fiber morphologies can be selected or controlled to achieve desired detackifying layer porosity properties. For example, the sizes of the fibers can be chosen to provide a desired degree of migration of the underlying reseal adhesive through the detackifying layer in response to pressure.
  • Other configurations of detackifying layers are also contemplated, e.g., layers with spaces formed, e.g., cut or punched, into the layer material or layers that are extruded or otherwise formed to define the spaces.
  • the fibers of the detackifying layer can, for example, have an average size (diameter) ranging from 1 micron to 100 microns, e.g., from 1.5 micron to 15 microns, from 2.5 microns to 25 microns, from 3 microns to 40 microns, from 4 microns to 65 microns, or from 6.5 microns to 100 microns.
  • the average fiber diameter can be less than 100 microns, e.g., less than 65 microns, less than 40 microns, less than 25 microns, less than 16 microns, less than 10 microns, less than 6 microns, less than 4 microns, less than 2.5 microns, or less than 1.5 microns.
  • the average fiber diameter can be greater than 1 micron, e.g., greater than 1.5 micron, greater than 2.5 micron, greater than 4 microns, greater than 6.5 microns, greater than 10 microns, greater than 15 microns, greater than 25 microns, greater than 40 microns, or greater than 65 microns.
  • Lower diameter fibers e.g., nanofibers having diameters less than 1 micron, are also contemplated.
  • the ability of the reseal adhesive to travel through the detackifying layer can also be influenced by the coat weight and thickness of the detackifying layer.
  • a detackifying layer having smaller values of coat weight and thickness will allow for greater penetration of the reseal adhesive into the detackifying layer when the adhesive tape is squeezed.
  • the disclosed adhesive tape provides the surprising benefit of being able to employ lesser coat weight and/or thickness (as compared to conventional resealable adhesive tapes), which advantageously leads to reduced production costs.
  • the coat weight of the detackifying layer ranges from 1 gram per square meter (gsm) to 15 gsm, e.g., from 1 gsm to 9.4 gsm, from 2.4 gsm to 10.8 gsm, from 3.8 gsm to 12.2 gsm, from 5.2 gsm to 13.6 gsm, or from 6.6 gsm to 15 gsm.
  • gsm gram per square meter
  • the detackifying layer coat weight can be less than 15 gsm, e.g., less than 13.6 gsm, less than 12.2 gsm, less than 10.8 gsm, less than 9.4 gsm, less than 8 gsm, less than 6.6 gsm, less than 5.2 gsm, less than 3.8 gsm, or less than 2.4 gsm.
  • the detackifying layer coat weight can be greater than 1 gsm, e.g., greater than 2.4 gsm, greater than 3.8 gsm, greater than 5.2 gsm, greater than 6.6 gsm, greater than 8 gsm, greater than 9.4 gsm, greater than 10.8 gsm, greater than 12.2 gsm, or greater than 13.6 gsm.
  • the thickness of the detackifying layer ranges from 0.05 mil to 10 mil, e.g., from 0.05 mil to 1.2 mil, from 0.08 mil to 2 mil, from 0.14 mil to 3.5 mil, from 0.25 mil to 5.9 mil, or from 0.42 mil to 10 mil.
  • the detackifying layer thickness can be less than 10 mil, e.g., less than 5.9 mil, less than 3.5 mil, less than 2 mil, less than 1.2 mil, less than 0.71 mil, less than 0.42 mil, less than 0.25 mil, less than 0.14 mil, or less than 0.08 mil.
  • the detackifying layer thickness can be greater than 0.05 mil, e.g., greater than 0.08 mil, greater than 0.14 mil, greater than 0.25 mil, greater than 0.42 mil, greater than 0.71 mil, greater than 1.2 mil, greater than 2 mil, greater than 2 mil, greater than 3.5 mil, or greater than 5.9 mil.
  • the thickness of the detackifying layer ranges from 10 mil to 20 mil, e.g. from 10 mil to 16 mil, from 11 mil to 17 mil, from 12 mil to 18 mil, from 13 mil to 19 mil, or from 14 mil to 20 mil.
  • the detackifying layer thickness can be less than 20 mil, e.g., less than 19 mil, less than 18 mil, less than 17 mil, less than 16 mil, less than 15 mil, less than 14 mil, less than 13 mil, less than 12 mil, or less than 11 mil. In terms of lower limits, the detackifying layer thickness can be greater than 10 mil, e.g., greater than 11 mil, greater than 12 mil, greater than 13 mil, greater than 14 mil, greater than 15 mil, greater than 16 mil, greater than
  • the detackifying layer can comprise a heat-activated hot melt adhesive.
  • a heat-activated hot melt adhesive can assist in the formation of the porous configuration of the layer.
  • a heat-activated hot melt adhesive can be heated and then applied to the tape in a heated and melted state to form the desired network of fibers and void spaces. After cooling, the heat- activated hot melt adhesive can then rigidify, preserving the desired layer morphology and porosity in the form of a permeable solid layer.
  • the detackifying layer consists of a heat-activated hot melt adhesive.
  • the detackifying layer consists essentially of a heat-activated hot melt adhesive.
  • the detackifying layer can include one or more additives such as, for example, one or more waxes, surfactants, talc, powdered silicates, filler agents, defoamers, colorants, antioxidants, UV stabilizers, luminescents, crosslinkers, buffer agents, anti-blocking agents, wetting agents, matting agents, antistatic agents, acid scavengers, flame retardants, processing aids, extrusion aids, and others.
  • the heat-activated hot melt adhesive of the detackifying layer comprises linear low-density polyethylene (LLDPE).
  • the heat-activated hot melt adhesive comprises metallocene linear low-density polyethylene (mLLDPE).
  • mLLDPE metallocene linear low-density polyethylene
  • commercial mLLDPE-based heat-activated hot melt adhesives useful in the practice of the present disclosure include, for example, ADVANTRA ® 9200, available from H.B. Fuller (St. Paul, M N).
  • the heat-activated hot melt adhesive of the detackifying layer comprises ethyl-vinyl acetate (EVA).
  • EVA-based heat- activated hot melt adhesives useful in the practice of the present disclosure include, for example, SWIFTTFIERM ® 84659, available from H.B. Fuller.
  • Other suitable materials for use in the detackifying layer include, but are not limited to, ethylene copolymers such as ethylene methyl acrylate (EMA) and ethylene ethyl acrylate (EEA), polypropylene copolymers, and polybutylene.
  • EMA ethylene methyl acrylate
  • EOA ethylene ethyl acrylate
  • the reseal adhesive layer of the adhesive tape serves as a releasable adhesive that can be used to repeatedly adhere to another material, e.g., a substrate or another adhesive tape.
  • the reseal adhesive layer of one adhesive tape can be used to releasably adhere to the reseal adhesive layer of another similarly or identically configured adhesive tape.
  • the composition of the reseal adhesive layer can be selected to have a relatively low peel strength.
  • the adhesive of the reseal adhesive layer has a peel strength ranging from 0.5 pounds per inch width (PIW) to 1.5 PIW as measured on an EVA-modified polyethylene substrate, e.g., from 0.5 PIW to 1.1 PIW, from 0.6 PIW to 1.2 PIW, from 0.7 PIW to 1.3 PIW, from 0.8 PIW to 1.4 PIW, or from 0.9 PIW to 1.5 PIW.
  • PIW pounds per inch width
  • the reseal adhesive peel strength can be less than 1.5 PIW, e.g., less than 1.4 PIW, less than 1.3 PIW, less than 1.2 PIW, less than 1.1 PIW, less than 1 PIW, less than 0.9 PIW, less than 0.8 PIW, less than 0.7 PIW, or less than 0.6 PIW.
  • the reseal adhesive peel strength can be greater than 0.5 PIW, e.g., greater than 0.6 PIW, greater than 0.7 PIW, greater than 0.8 PIW, greater than 0.9 PIW, greater than 1 PIW, greater than 1.1 PIW, greater than 1.2 PIW, greater than 1.3 PIW, or greater than 1.4 PIW.
  • the coat weight and thickness of the reseal adhesive layer can be selected to supply adequate reseal adhesive to flow through the adjacent detackifying layer, but not so much as to unnecessarily increase the dimensions of the adhesive tape. As with the detackifying layer, smaller reseal layer coat weights and thicknesses can be associated with reduced manufacturing costs for the adhesive tape.
  • the coat weight of the reseal adhesive layer of the adhesive tape ranges from 2 gsm to 30 gsm, e.g., from 2 gsm to 18.8 gsm, from 4.8 gsm to 21.6 gsm, from 7.6 gsm to
  • the reseal adhesive layer coat weight can be less than 30 gsm, e.g., less than 27.2 gsm, less than 24.4 gsm, less than
  • the reseal adhesive layer coat weight can be greater than 2 gsm, e.g., greater than 4.8 gsm, greater than 7.6 gsm, greater than 10.4 gsm, greater than 13.2 gsm, greater than 16 gsm, greater than 18.8 gsm, greater than 21.6 gsm, greater than 24.4 gsm, or greater than
  • the thickness of the reseal adhesive layer of the adhesive tape ranges from 0.05 mil to 10 mil, e.g., from 0.05 mil to 1.2 mil, from 0.08 mil to 2 mil, from 0.14 mil to 3.5 mil, from 0.25 mil to 5.9 mil, or from 0.42 mil to 10 mil.
  • the reseal adhesive layer thickness can be less than 10 mil, e.g., less than 5.9 mil, less than 3.5 mil, less than 2 mil, less than 1.2 mil, less than 0.71 mil, less than 0.42 mil, less than 0.25 mil, less than 0.14 mil, or less than 0.08 mil.
  • the reseal adhesive layer thickness can be greater than 0.05 mil, e.g., greater than 0.08 mil, greater than 0.14 mil, greater than 0.25 mil, greater than 0.42 mil, greater than 0.71 mil, greater than
  • the thickness of the reseal adhesive layer ranges from 10 mil to 20 mil, e.g. from 10 mil to 16 mil, from 11 mil to 17 mil, from 12 mil to 18 mil, from 13 mil to 19 mil, or from 14 mil to 20 mil. In terms of upper limits, the reseal adhesive layer thickness can be less than 20 mil, e.g., less than 19 mil, less than 18 mil, less than 17 mil, less than 16 mil, less than 15 mil, less than 14 mil, less than 13 mil, less than 12 mil, or less than 11 mil.
  • the reseal adhesive layer thickness can be greater than 10 mil, e.g., greater than 11 mil, greater than 12 mil, greater than 13 mil, greater than 14 mil, greater than 15 mil, greater than 16 mil, greater than 17 mil, greater than 18 mil, or greater than 19 mil.
  • the reseal adhesive can vary widely.
  • the use of the aforementioned detackifying layer beneficially allows for a wide variety of adhesives and adhesive types (including those that have not been traditionally used as resealable adhesives) to be employed. This benefit advantageously provides for improvements in permitting greater materials options and associated cost-effectiveness.
  • the adhesive tape can be configured such that the porous detackifying layer has a lesser coat weight and/or thickness than that of the reseal adhesive layer.
  • the inclusion of the spaces in the detackifying layer advantageously provides for lesser overall coat weight and/or thickness, e.g., less adhesive is required to cover a set area.
  • the ratio of the coat weight of the detackifying layer to the coat weight of the reseal adhesive layer ranges from 0.1 to 1, e.g., from 0.1 to 0.64, from 0.19 to 0.73, from 0.28 to 0.82, from 0.37 to 0.91, or from 0.46 to 1.
  • the ratio of the detackifying layer coat weight to the reseal adhesive coat weight can be less than 1, e.g., less than 0.91, less than 0.82, less than 0.73, less than 0.64, less than 0.55, less than 0.46, less than 0.37, less than 0.28, or less than 0.19.
  • the ratio of the detackifying layer coat weight to the reseal adhesive layer coat weight can be greater than 0.1, e.g., greater than 0.19, greater than 0.28, greater than 0.37, greater than 0.46, greater than 0.55, greater than 0.64, greater than 0.73, greater than 0.82, or greater than 0.91.
  • Higher ratio values e.g., ratio values of 1 to 3.4, 1.4 to 3.8, 1.8 to 4.2, 2.2 to 4.6, or 2.6 to 5, are also contemplated.
  • the ratio of the detackifying layer coat weight to the reseal adhesive layer coat weight is less than 5, e.g., less than 4.6, less than 4.2, less than 3.8, less than 3.4, less than 3, less than 2.6, less than 2.2, less than 1.8, or less than 1.4.
  • the ratio of the thickness of the detackifying layer to the thickness of the reseal adhesive layer ranges from 0.1 to 1, e.g., from 0.1 to 0.64, from 0.19 to 0.73, from 0.28 to 0.82, from 0.37 to 0.91, or from 0.46 to 1.
  • the ratio of the detackifying layer thickness to the reseal adhesive thickness can be less than 1, e.g., less than 0.91, less than 0.82, less than 0.73, less than 0.64, less than 0.55, less than 0.46, less than 0.37, less than 0.28, or less than 0.19.
  • the ratio of the detackifying layer thickness to the reseal adhesive layer thickness can be greater than 0.1, e.g., greater than 0.19, greater than 0.28, greater than 0.37, greater than 0.46, greater than 0.55, greater than 0.64, greater than 0.73, greater than 0.82, or greater than 0.91.
  • Higher ratio values e.g., ratio values of 1 to 3.4, 1.4 to 3.8, 1.8 to 4.2, 2.2 to 4.6, or 2.6 to 5, are also contemplated.
  • the ratio of the detackifying layer thickness to the reseal adhesive layer thickness is less than 5, e.g., less than 4.6, less than 4.2, less than 3.8, less than 3.4, less than 3, less than 2.6, less than 2.2, less than 1.8, or less than 1.4.
  • the reseal adhesive layer can comprise a pressure sensitive adhesive.
  • the reseal adhesive layer consists of a pressure sensitive adhesive.
  • the reseal adhesive layer consists essentially of a pressure sensitive adhesive.
  • the reseal adhesive layer can include one or more additives such as, for example, one or more waxes, surfactants, talc, powdered silicates, filler agents, defoamers, colorants, antioxidants, UV stabilizers, luminescents, crosslinkers, buffer agents, anti-blocking agents, wetting agents, matting agents, antistatic agents, acid scavengers, flame retardants, processing aids, extrusion aids, and others.
  • the pressure sensitive adhesive of the reseal adhesive layer of the adhesive tape comprises a rubber-based adhesive.
  • Commercial rubber-based pressure sensitive adhesives suitable for use in the reseal adhesive layer of the present disclosure include, for example, FASSON ® 3000, available from Avery Dennison (Mentor, OH), and HL 2811, available from H.B. Fuller.
  • Other suitable materials for use in the reseal adhesive layer include, but are not limited to, elastomeric adhesives such as rubbers, rubber modified acrylics, and urethanes.
  • the anchorage adhesive layer of the adhesive tape serves to affix the tape to another material.
  • the anchorage adhesive layer can be used to adhere the tape assembly to a surface of a reclosable and resealable package or container. Because the anchorage adhesive is intended to maintain adherence of the tape to the package surface during repeated opening and closing of the package, the composition of the anchorage adhesive layer can be selected to have a relatively high peel strength.
  • the adhesive of the anchorage adhesive layer has a peel strength ranging from 1.5 PIW to 5 PIW as measured on an EVA-modified polyethylene substrate, e.g., from 1.5 PIW to 3.6 PIW, from 1.85 PIW to 3.95 PIW, from 2.2 PIW to 4.3 PIW, from 2.55 PIW to 4.65 PIW, or from 2.9 PIW to 5 PIW.
  • the anchorage adhesive peel adhesion can be less than 5 PIW, e.g., less than 4.65 PIW, less than 4.3 PIW, less than 3.95 PIW, less than 3.6 PIW, less than 3.25 PIW, less than 2.9 PIW, less than 2.55 PIW, less than 2.2 PIW, or less than 1.85 PIW.
  • the anchorage adhesive peel strength can be greater than 1.5 PIW, e.g., greater than 1.85 PIW, greater than 2.2 PIW, greater than 2.55 PIW, greater than 2.9 PIW, greater than 3.25 PIW, greater than 3.6 PIW, greater than 3.95 PIW, greater than 4.3 PIW, or greater than 4.65 PIW.
  • the anchorage adhesive is generally stronger than the reseal adhesive.
  • the ratio of the peel strength of the reseal adhesive to the peel strength of the anchorage adhesive ranges from 0.1 to 1, e.g., from 0.1 to 0.64, from 0.19 to 0.73, from 0.28 to 0.82, from 0.37 to 0.91, or from 0.46 to 1.
  • the ratio of the reseal adhesive peel strength to the anchorage adhesive peel strength can be less than 1, e.g., less than 0.91, less than 0.82, less than 0.73, less than 0.64, less than 0.55, less than 0.46, less than 0.37, less than 0.28, or less than 0.19.
  • the ratio of the reseal adhesive peel strength to the anchorage adhesive peel strength can be greater than 0.1, e.g., greater than 0.19, greater than 0.28, greater than 0.37, greater than 0.46, greater than 0.55, greater than 0.64, greater than 0.73, greater than 0.82, or greater than 0.91.
  • Higher ratio values e.g., ratio values of 1 to 3.4, 1.4 to
  • the ratio of the reseal adhesive peel strength to the anchorage adhesive peel strength is less than 5, e.g., less than 4.6, less than
  • the anchorage adhesive layer can comprise a pressure sensitive adhesive.
  • the anchorage adhesive layer consists of a pressure sensitive adhesive.
  • the anchorage adhesive layer consists essentially of a pressure sensitive adhesive.
  • the anchorage adhesive layer can include one or more additives such as, for example, one or more waxes, surfactants, talc, powdered silicates, filler agents, defoamers, colorants, antioxidants, UV stabilizers, luminescents, crosslinkers, buffer agents, anti-blocking agents, wetting agents, matting agents, antistatic agents, acid scavengers, flame retardants, processing aids, extrusion aids, and others.
  • the pressure sensitive adhesive of the anchorage adhesive layer of the adhesive tape comprises a rubber-based adhesive.
  • Rubber-based pressure sensitive adhesives useful for practice in the anchorage adhesive layer of the present disclosure include, for example, S462, available from Avery Dennison.
  • Other suitable materials for use in the anchorage adhesive layer include, but are not limited to, tackified acrylics.
  • the adhesive tape can further include a support layer, at least a portion of which is disposed between the anchorage adhesive layer and reseal adhesive layer.
  • the support layer can serve as a barrier, separating the different adhesives of the anchorage adhesive layer and the reseal adhesive layer.
  • the support layer can also provide structure or increased rigidity to the adhesive tape.
  • the support layer can also function as a base onto which other layers are added during manufacture of the adhesive tape.
  • one or both of the anchorage adhesive layer and the reseal adhesive layer are directly adjacent to the support layer.
  • one or more intervening layers are disposed between the support layer and one or both of the anchorage adhesive layer and the reseal adhesive layer.
  • the support layer is coextensive with one or both of the anchorage adhesive layer and the reseal adhesive layer.
  • the support layer can be configured to have a thickness great enough to impart the features and benefits described above to the adhesive tape, but small enough to preserve the flexibility and low manufacturing cost of the tape.
  • the support layer has a thickness ranging from 0.2 mil to 5 mil, e.g., from 0.2 mil to 1.4 mil, from 0.3 mil to 1.9 mil, from 0.4 mil to 2.6 mil, from 0.5 mil to 3.6 mil, or from 0.7 mil to 5 mil.
  • the support layer thickness can be less than 5 mil, e.g., less than 3.6 mil, less than 2.6 mil, less than 1.9 mil, less than 1.4 mil, less than 1 mil, less than 0.7 mil, less than 0.5 mil, less than 0.4 mil, or less than 0.3 mil.
  • the support layer thickness can be greater than 0.2 mil, e.g., greater than 0.3 mil, greater than 0.4 mil, greater than 0.5 mil, greater than 0.7 mil, greater than 1 mil, greater than 1.4 mil, greater than 1.9 mil, greater than 2.6 mil, or greater than 3.6 mil.
  • the support layer of the adhesive tape comprises one or more plastics.
  • the support layer can include or be formed from any suitable polymer or mixture of polymers.
  • the support layer can comprise a thermoplastic polymer.
  • the polymer or mixture of polymers of the support layer can include, for example, polyethylene terephthalate (PET), recycled polyethylene terephthalate (rPET), high density polyethylene (HDPE), polyvinyl chloride (PVC), poly lactic acid (PLA), cellulose, biopolymer films, low density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), polyesters, or other types of polymers or plastics.
  • the support layer comprises PET.
  • the support layer consists of PET. In some embodiments, the support layer consists essentially of PET. Release Liner
  • the adhesive tape can further include a release liner located on an external face of the tape.
  • the release liner can be located directly adjacent to the anchorage adhesive layer, and configured to be removable prior to an application of the tape to a surface by contacting the thus exposed anchorage adhesive layer to the surface.
  • one or more intervening layers are disposed between the release liner and the anchorage adhesive layer.
  • the release liner is coextensive with the anchorage adhesive layer.
  • the releasable liner can function as a protective cover such that the release liner remains in place until the sheet is ready for attachment to an object or surface.
  • a liner or release liner is included in the adhesive tape, a wide array of materials and configurations can be used for the liner.
  • the liner is a paper or paper-based material.
  • the liner is a polymeric film of one or more polymeric materials.
  • at least one face of the liner is coated with a release material such as a silicone or silicone-based material.
  • the liner can be in the form of a single sheet. Alternatively, the liner can be in the form of multiple sections or panels.
  • the adhesive tape can further include a heat seal layer located on an external face of the tape.
  • the heat seal layer can serve as an alternative means for attaching the tape to, for example, a surface of a reclosable and resealable package or container. Because the heat seal adhesive is intended to maintain adherence of the tape to the package surface during repeated opening and closing of the package, the composition of the heat seal layer can be selected to have a relatively high peel strength that is generally higher than that of the reseal adhesive.
  • the presence of an external heat seal layer in the adhesive tape assembly provides advantages associated with improved compatibility of the tape with, for example, existing heat sealing equipment and processes. In this way, methods and devices that have been designed for the application of heat seal tapes and labels to surfaces can be used with the adhesive tapes provided herein with minimal or no adaptation.
  • the anchorage adhesive layer can be disposed between the reseal adhesive layer and the heat seal layer.
  • the anchorage adhesive layer is directly adjacent to the heat seal layer.
  • one or more intervening layers are disposed between the heat seal layer and the anchorage adhesive layer.
  • the adhesive tape can include a stiffening layer disposed between the heat seal layer and the anchorage adhesive layer.
  • the stiffening layer and the anchorage adhesive layer are coextruded with one another prior to the addition of the heat seal layer.
  • the heat seal layer is coextensive with the anchorage adhesive layer.
  • the adhesive tape can further include a release liner as described above, wherein the release liner is disposed adjacent to the heat seal layer and is removable to thereby expose the heat seal face of the adhesive tape.
  • the heat seal layer can be configured to have a thickness ranging from, for example, 5 microns to 90 microns, e.g., from 5 microns to 56 microns, from 13.5 microns to 64.5 microns, from 22 microns to 73 microns, from 30.5 microns to 81.5 microns, or from 39 microns to 90 microns.
  • the heat seal layer thickness can be less than 90 microns, e.g., less than 81.5 microns, less than 73 microns, less than 64.5 microns, less than 56 microns, less than 47.5 microns, less than 39 microns, less than 30.5 microns, less than 22 microns, or less than 13.5 microns.
  • the heat seal layer thickness can be greater than 5 microns, e.g., greater than 13.5 microns, greater than 22 microns, greater than 30.5 microns, greater than 39 microns, greater than 47.5 microns, greater than 64.5 microns, greater than 73 microns, or greater than 81.5 microns.
  • the heat seal layer of the adhesive tape can be water-based or solvent-based.
  • the heat seal layer is optionally clear, opaque, or translucent.
  • the heat seal layer can be colored and can exhibit a white, off-white, or nearly any other color.
  • the heat seal layer is in the form of thin, frangible polymeric films. Such films could be transferred via release liner to a desired surface or substrate region.
  • An example of such a polymeric film is a heat activated thermoplastic dry film.
  • Materials for the heat seal layer can in certain embodiments include, but are not limited to, one or more of polyethylene, metallocene catalyzed polyolefins, syndiotactic polystyrene, syndiotactic polypropylene, cyclic polyolefins, polyethylene methyl acrylic acid, polyethylene ethyl acrylate, polyethylene methyl acrylate, acrylonitrile butadiene styrene polymer, polyethylene vinyl alcohol, EVA, polybutylene, polystyrene, polyurethane, polysulfone, polyvinylidene chloride, polypropylene, polymethyl pentene, styrene maleic anhydride polymer, styrene acrylonitrile polymer, ionomers based on sodium or zinc salts of ethylene/methacrylic acid, polymethyl methacrylates, cellulosics, polyacrylonitriles, thermoplastic polyesters, amorphous
  • polyethylene is used in the heat seal layer, and particularly, a blend of PE and EVA, such as for example, a blend of PE and EVA with special antiblock and antistatic additives.
  • the heat seal layer can include one or more additives such as, for example, one or more waxes, surfactants, talc, powdered silicates, filler agents, defoamers, colorants, antioxidants, UV stabilizers, luminescents, crosslinkers, buffer agents, anti-blocking agents, wetting agents, matting agents, antistatic agents, acid scavengers, flame retardants, processing aids, extrusion aids, and others.
  • FIG. 1 illustrates one provided embodiment. Shown in the figure is adhesive tape assembly 100.
  • the adhesive tape includes an upper porous detackifying layer 101, one face of which is an external face of the tape assembly. Underlying the detackifying layer is a reseal adhesive layer 102 that includes a reseal pressure sensitive adhesive.
  • One face of the reseal adhesive layer is in contact with the detackifying layer, and an opposite face of the reseal adhesive layer is in contact with a coextruded film that includes a coextruded skin adhesive anchorage adhesive layer 103, and a core stiffening layer 104.
  • a coextruded skin heat seal layer 105 is disposed beneath the core stiffening layer of the coextruded film, with one face of the heat seal layer acting as an external face of the adhesive tape assembly opposite the detackifying layer.
  • the tape can act as a pressure- sensitive reclosure tape that can be applied to, for example, pouches and bags, by affixing using conventional heat sealing equipment.
  • FIG. 2 illustrates another provided embodiment. Shown in the figure is adhesive tape assembly 200.
  • the adhesive tape includes upper porous detackifying layer 201, one face of which is an external face of the tape assembly. Underlying the detackifying layer is a reseal adhesive layer 202 that includes a reseal pressure sensitive adhesive.
  • One face of the reseal adhesive layer is in contact with the detackifying layer, and an opposite face of the reseal adhesive layer is in contact with a support layer 203 in the form of a PET film.
  • the PET film separates the reseal adhesive layer from the anchorage adhesive layer 204, which is also in contact with the PET film support layer, and which includes an anchorage pressure sensitive adhesive.
  • a release liner 205 is disposed beneath the anchorage adhesive layer, with one face of the release liner acting as an external face of the adhesive tape assembly opposite the detackifying layer.
  • the tape can act as a pressure- sensitive reclosure tape that can be produced, for example, by applying the reseal adhesive layer and the detackifying layer sequentially via spray coating to beneficially have low layer coat weights and reduced associated costs.
  • the methods can include providing a multilayer film, wherein the multilayer film comprises a support layer and an anchorage adhesive layer.
  • the support layer can be as described above.
  • the support layer is a PET film.
  • the anchorage adhesive layer can be as described above.
  • the anchorage adhesive layer includes a rubber-based anchorage pressure sensitive adhesive having a peel strength greater than 1.5 PIW.
  • the multilayer film is a coextruded film.
  • the multilayer film can include one or more of a coextruded skin, a heat seal layer, or a release liner.
  • the heat seal layer can be any of the heat seal layers described above.
  • the release liner can be any of the release liners described above.
  • the methods can further include spray coating a (heat-activated) pressure sensitive adhesive onto a face of the multilayer film, thereby generating a reseal adhesive layer.
  • a (heat-activated) pressure sensitive adhesive onto a face of the multilayer film, thereby generating a reseal adhesive layer.
  • the support layer of the multilayer film can be disposed between the reseal adhesive layer and the anchorage adhesive layer.
  • the reseal adhesive layer can be as described above.
  • the reseal adhesive layer includes a rubber-based reseal pressure sensitive adhesive having a peel strength less than 1.5 PIW.
  • the spray coating step can be configured to produce a reseal adhesive layer having, for example, a coat weight of less than 30 gsm and a thickness of less than 0.8 mil.
  • the methods can further include (spray) coating a heat-activated hot melt adhesive onto the reseal adhesive layer, thereby generating a porous detackifying layer defining spaces therein.
  • the detackifying layer can be as described above. In some embodiments, the detackifying layer has a porosity as discussed above.
  • the spray coating can be configured to produce a detackifying layer having, for example, a coat weight and a thickness as described above.
  • the spray coating of the heat-activated hot melt adhesive includes fiberizing the heat-activated hot melt adhesive.
  • fiberizing refers to the dispensing of material such that the material forms fibers as it is dispensed.
  • fiberizing can refer to the dispensing of a hot melt material via spray coating.
  • Hot melt material such as a hot melt adhesive
  • the applicator can be configured to, for example, contact the molten adhesive with heated air as the adhesive is dispensed.
  • the applicator can shape the dispensing streams such that, upon cooling, the molten adhesive solidifies into a network of fibers.
  • the fiberizing generates fibers having an average diameter of less than 100 microns.
  • reclosable articles that can comprise two or more surfaces, each independently adhered to a provided adhesive tape of the configuration described above.
  • a provided reclosable article includes a first surface adhered to a first adhesive tape, and a second surface adhered to a second adhesive tape.
  • At least a portion of the detackifying layer of each of the adhesive tapes is capable of allowing at least a portion of the reseal adhesive of the tape to flow therethrough when pressure is applied to the detackifying layer.
  • the adhesive tapes and the reclosable article surfaces are configured such that the tapes can be brought in contact with one another.
  • the porous detackifying layer of one adhesive tape can be brought in contact with the porous detackifying layer of another adhesive tape.
  • the two opposing and contacting adhesive tapes are then pressed towards one another, the resulting pressure can cause the reseal adhesive within each of the tapes to flow through the porous detackifying layers.
  • the reseal adhesives thus contact one another, at least a portion of the reseal adhesive layer of the first adhesive tape can releasably adhere to at least a portion of the reseal adhesive layer of the second adhesive tape.
  • the adhesive tapes and the reclosable article together form a pressure-sensitive reclosable system.
  • the reclosable article is a container defining an interior cavity.
  • the reclosable article can be, for example, a box, a bag, or a pouch.
  • the reclosable article can be rigid, with foldable or hinged portions to allow the adhesive tapes to be brought into and out of contact with one another.
  • the reclosable article can have flexible portions that can be flexed to allow the adhesive tapes to be brought into and out of contact with one another.
  • at least one of the reclosable article surfaces attached to an adhesive tape is a surface of a container lid, and at least one of the reclosable article surfaces attached to an adhesive tape is a surface of a container wall.
  • each of the first surface and the second surface of the reclosable article are independently an interior surface of the article. In this way, the adhesive tapes are not located on the exterior of the article. This can be beneficial when, for example, it is desired that the adhesive tape not disrupt a desired article texture or appearance, such as that involving printing or other graphic design.
  • each of the first surface and the second surface are independently an exterior surface of the article. In this way, the adhesive tapes are not located in the interior of the article. This can be beneficial when, for example, it is desired that the adhesive tape not contact or otherwise interact with any of the article contents, such as food items or liquids.
  • one of the first and second surfaces is an interior surface of the article, and the other of the first and second surfaces is an exterior surface of the article.
  • the first adhesive tape and the second adhesive tape can be adhered to the first reclosable article surface and the second reclosable article surface, respectively, through the anchorage adhesive layers of the adhesive tapes.
  • the first adhesive tape and the second adhesive tape can be adhered to the first surface and the second surface, respectively, through heat seal layers of the adhesive tapes.
  • one of the first and the second adhesive tapes is adhered to an article surface through an anchorage adhesive layer, and the other of the first and the second adhesive tapes is adhered through a heat seal layer.
  • the reclosable article surfaces to which the adhesive tapes are adhered can include a wide range of surface substrates.
  • the article surfaces can include glass, plastic, wood, metal, paper, a combination of these, and other materials.
  • the article surfaces each independently include one or more plastics.
  • the article surfaces can include or be formed from any suitable polymer or mixture of polymers.
  • the polymer or mixture of polymers can include, for example, PET, rPET, HDPE, PVC, PLA, cellulose, biopolymer films, LDPE, PP, PS, polyesters, or other types of polymers or plastics.
  • the article surfaces include PET.
  • Embodiment 1 An adhesive tape comprising: a porous detackifying layer defining spaces therein; an anchorage adhesive layer; and a reseal adhesive layer, at least a portion of which is disposed between the detackifying layer and the anchorage adhesive layer.
  • Embodiment 2 An embodiment of embodiment 1, wherein at least a portion of the detackifying layer is capable of allowing at least a portion of the reseal adhesive layer to flow therethrough when pressure is applied to the detackifying layer.
  • Embodiment 3 An embodiment of embodiment 1 or 2, wherein the detackifying layer has a porosity ranging from 10% to 50%.
  • Embodiment 4 An embodiment of any of the embodiments of embodiment 1-3, wherein the detackifying layer comprises fibers having an average diameter of less than 100 microns.
  • Embodiment 5 An embodiment of any of the embodiments of embodiment 1-4, wherein the detackifying layer has a coat weight of less than 15 gsm.
  • Embodiment 6 An embodiment of any of the embodiments of embodiment 1-5, wherein the reseal adhesive layer has a coat weight of less than 30 gsm.
  • Embodiment 7 An embodiment of any of the embodiments of embodiment 1-6, wherein the ratio of the detackifying layer coat weight to the reseal adhesive coat weight is less than 1.
  • Embodiment 8 An embodiment of any of the embodiments of embodiment 1-7, wherein the detackifying layer has a thickness of less than 2 mil.
  • Embodiment 9 An embodiment of any of the embodiments of embodiment 1-8, wherein the reseal adhesive layer has a thickness of less than 3.5 mil.
  • Embodiment 10 An embodiment of any of the embodiments of embodiment 1-9, wherein the ratio of the detackifying layer thickness to the reseal adhesive coat thickness is less than 1.
  • Embodiment 11 An embodiment of any of the embodiments of embodiment 1-11, wherein the detackifying layer comprises a heat-activated hot melt adhesive.
  • Embodiment 12 An embodiment of embodiment 11, wherein the heat-activated hot melt adhesive comprises metallocene linear low-density polyethylene (mLLDPE).
  • mLLDPE metallocene linear low-density polyethylene
  • Embodiment 13 An embodiment of embodiment 11, wherein the heat-activated hot melt adhesive comprises ethylene-vinyl acetate (EVA).
  • EVA ethylene-vinyl acetate
  • Embodiment 14 An embodiment of any of the embodiments of embodiment 1-13, wherein the anchorage adhesive layer comprises an anchorage pressure sensitive adhesive having a peel strength of greater than 1.5 pounds per inch width on an EVA-modified polyethylene substrate.
  • Embodiment 15 An embodiment of embodiment 14, wherein the anchorage pressure sensitive adhesive is an anchorage rubber-based adhesive.
  • Embodiment 16 An embodiment of embodiment 14 or 15, wherein the reseal adhesive layer comprises a reseal pressure sensitive adhesive having a peel strength of less than 1.5 pounds per inch width on an EVA-modified polyethylene substrate.
  • Embodiment 17 An embodiment of embodiment 16, wherein the ratio of the reseal pressure sensitive adhesive peel strength to the anchorage pressure sensitive adhesive peel strength is less than 1.
  • Embodiment 18 An embodiment of embodiment 16 or 17, wherein the reseal pressure sensitive adhesive is a reseal rubber based adhesive.
  • Embodiment 19 An embodiment of any of the embodiments of embodiment 1-18, further comprising: a support layer, at least a portion of which is disposed between the anchorage adhesive layer and the reseal adhesive layer.
  • Embodiment 20 An embodiment of embodiment 19, wherein the support layer comprises a thermoplastic polymer.
  • Embodiment 21 An embodiment of embodiment 20, wherein the thermoplastic polymer is polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • Embodiment 22 An embodiment of any of the embodiments of embodiment 19-21, wherein the support layer has a thickness ranging from 0.2 mil to 5 mil.
  • Embodiment 23 An embodiment of any of the embodiments of embodiment 1-22, further comprising: a heat seal layer, wherein at least a portion of the anchorage adhesive layer is disposed between the reseal adhesive layer and the heat seal layer.
  • Embodiment 24 An embodiment of any of the embodiments of embodiment 1-22, further comprising: a release liner, wherein at least a portion of the anchorage adhesive layer is disposed between the reseal adhesive layer and the release liner.
  • Embodiment 25 A method for producing an adhesive tape, the method comprising: providing a multilayer film comprising a support layer and an anchorage adhesive layer; spray coating a pressure sensitive adhesive onto a face of the multilayer film, thereby generating a reseal adhesive layer such that at least a portion of the support layer is disposed between the reseal adhesive layer and the anchorage adhesive layer; and spray coating a heat-activated hot melt adhesive onto the reseal adhesive layer, thereby generating a porous detackifying layer defining spaces therein.
  • Embodiment 26 An embodiment of embodiment 25, wherein the spray coating of the heat-activated hot melt adhesive comprises fiberizing the heat-activated hot melt adhesive.
  • Embodiment 27 An embodiment of embodiment 26, wherein the fiberizing generates fibers having an average diameter of less than 100 microns.
  • Embodiment 28 An embodiment of any of the embodiments of embodiment 25-27, wherein the detackifying layer has a porosity ranging from 10% to 50%.
  • Embodiment 29 An embodiment of any of the embodiments of embodiment 25-28, wherein the ratio of the detackifying layer coat weight to the reseal adhesive coat weight is less than 1.
  • Embodiment 30 An embodiment of any of the embodiments of embodiment 25-29, wherein the ratio of the detackifying layer thickness to the reseal adhesive coat thickness is less than 1.
  • Embodiment 31 An embodiment of any of the embodiments of embodiment 25-30, wherein anchorage adhesive layer comprises an anchorage pressure sensitive adhesive, and wherein the ratio of the reseal pressure sensitive adhesive peel strength to the anchorage pressure sensitive adhesive peel strength is less than 1.
  • Embodiment 32 An embodiment of any of the embodiments of embodiment 25-31, wherein the multilayer film is a coextruded film.
  • Embodiment 33 An embodiment of any of the embodiments of embodiment 25-32, wherein the multilayer film further comprises a heat seal layer, wherein at least a portion of the anchorage adhesive layer is disposed between the support layer and the heat seal layer.
  • Embodiment 34 An embodiment of any of the embodiments of embodiment 25-33, wherein the multilayer film further comprises a release liner, wherein at least a portion of the anchorage adhesive layer is disposed between the support layer and the release liner.
  • Embodiment 35 A reclosable article comprising: a first surface adhered to a first adhesive tape; and a second surface adhered to a second adhesive tape; wherein each of the first adhesive tape and the second adhesive tape comprises: a porous detackifying layer defining spaces therein; an anchorage adhesive layer; and a reseal adhesive layer, at least a portion of which is disposed between the detackifying layer and the anchorage adhesive layer, wherein at least a portion of the detackifying layer is capable of allowing at least a portion of the reseal adhesive to flow therethrough when pressure is applied to the detackifying layer; and wherein at least a portion of the reseal adhesive layer of the first adhesive tape releasably adheres to at least a portion of the reseal adhesive layer of the second adhesive tape.
  • Embodiment 36 An embodiment of embodiment 35, wherein the reclosable article defines an interior cavity, and wherein each of the first surface and the second surface is independently an interior surface of the article.
  • Embodiment 37 An embodiment of embodiment 35, wherein the reclosable article defines an interior cavity, and wherein each of the first surface and the second surface is independently an exterior surface of the article.
  • Embodiment 38 An embodiment of any of the embodiments of embodiment 35-37, wherein the anchorage adhesive layer of the first adhesive tape is adhered to the first surface, and wherein the anchorage adhesive layer of the second adhesive tape is adhered to the second surface.
  • Embodiment 39 An embodiment of any of the embodiments of embodiment 35-37, wherein each of the first adhesive tape and the second adhesive tape further comprises: a heat seal layer, wherein at least a portion of the anchorage adhesive layer is disposed between the reseal adhesive layer and the heat seal layer, and wherein the heat seal layer of the first adhesive tape is adhered to the first surface, and wherein the heat seal layer of the second adhesive tape is adhered to the second surface.
  • Embodiment 40 An embodiment of any of the embodiments of embodiment 35-39, wherein the reclosable article is a flexible pouch or bag [00100] While the disclosure has been described in detail, modifications within the spirit and scope of the disclosure will be readily apparent to those of skill in the art. In view of the foregoing discussion, relevant knowledge in the art and references discussed above in connection with the Background and Detailed Description, the disclosures of which are all incorporated herein by reference. In addition, it should be understood that aspects of the disclosure and portions of various embodiments and various features recited below and/or in the appended claims may be combined or interchanged either in whole or in part.

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  • Chemical & Material Sciences (AREA)
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  • Adhesive Tapes (AREA)

Abstract

La présente invention concerne un ruban adhésif comprenant une couche adhésive d'ancrage, une couche anti-adhésive poreuse et une couche adhésive de rescellement, dont au moins une partie est disposée entre la couche adhésive d'ancrage et la couche anti-adhésive poreuse. Lorsqu'une pression est appliquée à la couche anti-adhésive, comme par exemple lors du pressage de la couche anti-adhésive d'un premier ruban adhésif contre la couche anti-adhésive d'un second ruban adhésif, la couche anti-adhésive est apte à permettre à au moins une partie de la couche adhésive de rescellement de s'écouler à travers cette dernière. L'invention concerne également des procédés de production du ruban adhésif selon l'invention, et des articles refermables qui comprennent le ruban adhésif selon l'invention.
PCT/US2019/013474 2018-01-12 2019-01-14 Ruban de refermeture d'emballage souple Ceased WO2019140376A1 (fr)

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US201862616746P 2018-01-12 2018-01-12
US62/616,746 2018-01-12

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WO2019140376A1 true WO2019140376A1 (fr) 2019-07-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4028255A1 (fr) * 2019-09-12 2022-07-20 Sonoco Development, Inc. Film rescellable

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0632359A (ja) * 1992-07-14 1994-02-08 Toyo Alum Kk 包装袋
US5736470A (en) * 1996-06-25 1998-04-07 Omega Research, Inc. Pressure sensitive adhesive article and method of making
EP1310538A1 (fr) * 2000-04-19 2003-05-14 Plast Corporation Feuille adhesive autocollante pouvant se coller et se retirer de facon repetee
WO2017017613A1 (fr) * 2015-07-30 2017-02-02 3M Innovative Properties Company Doublure de bande dotée de filaments partiellement incorporés

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0632359A (ja) * 1992-07-14 1994-02-08 Toyo Alum Kk 包装袋
US5736470A (en) * 1996-06-25 1998-04-07 Omega Research, Inc. Pressure sensitive adhesive article and method of making
EP1310538A1 (fr) * 2000-04-19 2003-05-14 Plast Corporation Feuille adhesive autocollante pouvant se coller et se retirer de facon repetee
WO2017017613A1 (fr) * 2015-07-30 2017-02-02 3M Innovative Properties Company Doublure de bande dotée de filaments partiellement incorporés

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4028255A1 (fr) * 2019-09-12 2022-07-20 Sonoco Development, Inc. Film rescellable
EP4028255B1 (fr) * 2019-09-12 2026-03-18 TOPPAN Packaging Americas Holdings, Inc. Film refermable

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