Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
  • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B23/06—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
  • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B23/08—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
  • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/51—Elastic
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/54—Yield strength; Tensile strength
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/582—Tearability
  • B32B2307/5825—Tear resistant
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/75—Printability

Definitions

• the present invention relates to a sheet-like assembly comprising one or more segments which can be easily detached from the assembly at any time.
• the invention is described below with reference to one of its very advantageous applications which relates to the manufacture of printed matter such as business cards, business cards and the like.
• the invention can however be applied to a very large number of different applications such as, in particular, the production of labels for the backs of binders, cards with pre-printed information, conference cards, etc.
• office printers such as laser printers or inkjet printers.
• Various techniques have already been proposed to solve this problem.
• the mechanical properties of the extruded polymer against the back of the front sheet are such that when the composite sheet is folded along a notch line and towards the front (towards the free face of the front sheet) the plastic support film breaks according to the notch line.
• this technique involves the use of an expensive polymer such as polymethylpentene.
• the present invention proposes to provide a different technique which makes it possible in particular to use less expensive supports.
• the insertion also aims to provide such a technique which makes it possible in particular to produce products which are biodegradable and are therefore advantageous from an ecological point of view.
• the subject of the present invention is a sheet-shaped assembly comprising a front sheet connected by means of a layer of adhesive to a support plastic film.
• the free side of the front sheet, which forms the front of the sheet-shaped assembly, is printable.
• This sheet-shaped assembly comprises one or more segments delimited by notch lines. These notch lines are formed in the sheet-like assembly from the front towards the back, crossing the front sheet and the layer of adhesive and penetrating into the plastic support film without passing completely through it.
• the mechanical properties of this plastic film are such that when the sheet-shaped assembly is folded along a notch line towards the back, the sheet-shaped assembly breaks along this notch line. It will be understood that it is the free face of the front sheet (that is to say the face of this front sheet which faces outwards and which therefore is not in contact with the adhesive layer) which forms the front of the sheet-shaped assembly.
• the plastic support film may in particular have a thickness between 20 and 80 ⁇ m and, in particular, between 40 and 60 ⁇ m.
• the free face of the plastic support film may be glossy or matt, but it is generally advantageous for it to be matt.
• the face of the plastic film which is in contact with the adhesive layer may also be 'matte.
• the free face of the plastic support film may have undergone a treatment which makes it receptive to ink. Such treatment may consist, in particular, in coating with one or other of the products which are commercially available for this purpose and which are well known to those skilled in the art.
• the plastic support film has a tensile strength according to ASTM D 882, greater than 50 N / mm 2 and preferably even greater than 70 N / mm 2 .
• the plastic support film may in particular have a modulus of elasticity of between 2 x 10 3 and 4 x 10 3 N / mm 2 and an elongation at break of between 10 and 50% according to ASTM D 882.
• the plastic support film advantageously has a resistance to tear initiation of between 0.07 and 0.12 N and a resistance to tear propagation of between 0.05 and 0.09 N according to ASTM 1938.
• several plastics commonly available commercially may be suitable, provided that the mechanical properties make it possible to meet the desired goal.
• the sheet-shaped assembly can be normally handled and in particular passed through an office printer (for example: laser printer or inkjet printer) without that this assembly breaks along the notch lines.
• an office printer for example: laser printer or inkjet printer
• the assembly can finally be broken manually, along the notch lines, at the desired time (especially after at least one side of the assembly has been printed with a desktop printer).
• the plastic support film has a sufficiently high tensile strength and a sufficiently low flexural strength (of the notched film).
• the plastic support film may in particular consist of a cellulose diacetate film plasticized by means of diethyl phthalate. As indicated above, it is important that the notch lines penetrate into the plastic support film without passing completely through it.
• the penetration depth of the notch lines in the plastic support film is not critical and could for example be from 20 to 70% of the thickness of the plastic support film.
• the front sheet of the sheet-shaped assembly can in particular be made of paper. In this case, it is preferably a strong “Bristol” type paper having a grammage of between 80 and 400 g / m 2 . For the rest, many types of paper can be used, but it is preferable that these papers have good rigidity.
• the front sheet can also be made of other materials and in particular of plastic material. In this case, the free face of the front sheet may be mat or glossy, but it is generally preferable or even necessary that it has been treated to make it printable.
• the thickness of the front sheet is generally between 100 and 500 ⁇ m.
• the adhesive layer of the sheet-like assembly can be made from various types of adhesives (solvent-based adhesive, water-based adhesive, hot melt adhesive). However, it is advantageous to use an adhesive which provides strong adhesion and has strong internal cohesion so as to avoid in particular any problem of sliding of the plastic support film with respect to the front sheet. It is also important to use a sufficiently cohesive adhesive to ensure a clean cut without adhesive deposit on the knives when cutting the assembly or the formation of notch lines and to avoid any creep of adhesive. towards the edge of the leaf-shaped assembly. It is also important that the adhesive has sufficient heat resistance to prevent the adhesive from creeping under the effect of heat from laser printers or copiers. It is also desirable to use a low odor adhesive
• an acrylic adhesive in aqueous emulsion can have a dry extract of between 30 and 70%, but preferably around 60%.
• the adhesive layer of the sheet-like assembly can have a grammage of between 5 and 20 g / m 2 . It should be understood that this grammage relates to the dry matter of the adhesive.
• the invention also relates to a method for manufacturing a sheet-shaped assembly as described above.
• one side of a front sheet and / or one side of a support plastic film is coated with adhesive, the front sheet and the plastic film are applied against each other so that the adhesive is sandwiched between them, the product thus obtained is laminated, the free face of the front sheet of which forms the front and the free face of the plastic film the back, this product forms notch lines which delimit one or more segments, these notch lines being formed from the front towards the back, crossing the front sheet and the adhesive layer and penetrating into the plastic film without crossing it completely.
• the mechanical properties of the plastic support film must be such that when the sheet-shaped assembly is folded along a notch line and towards the back, the sheet-shaped assembly breaks along this notch line .
• FIG. 1 is a plan view of the front side of a sheet-shaped assembly according to the invention
• Fig. 2 is a sectional view along the line II-II of FIG. 1, on an enlarged scale.
• a paper 1 a plastic film 2 and an adhesive 3.
• the paper 1, supplied in rolls, is matt white and has a grammage of 160 g / m 2 .
• the plastic film 2, also supplied in reels, is a film of cellulose diacetate plasticized by means of approximately 16% of diethyl phthalate, with a thickness of 50 ⁇ m, the two faces of which are mat. It is a cast, unstretched film with a density of about 1.31. Thanks to the fairly high density of the cellulose diacetate film, it will be possible to produce business cards (for example) having a relatively small thickness while having a sufficiently high grammage and rigidity.
• This plastic film offers a tensile strength which is at least equal to 75 N / mm 2 (according to ASTM D 882).
• the elongation at break is between 20 and 45% (according to ASTM D 882).
• the modulus of elasticity (according to ASTM D 882) is approximately 28 x 10 3 N / mm.
• the resistance to tear initiation is approximately 0.095 N and the resistance to tear propagation is approximately 0.071 N (according to ASTM D 1938).
• the mechanical properties indicated above were measured after preparation of the samples at 23 ° C and 50% relative humidity. It will be noted that this plastic film of cellulose diacetate 2 offers good resistance to tensile rupture, but low resistance to tearing.
• the adhesive 3 used is an acrylic adhesive supplied and used as an aqueous emulsion containing 60% dry matter. It is an adhesive which provides good adhesion and which has a high internal cohesion, which makes it possible to avoid any problem of slipping or delamination of the two laminated substrates.
• the good internal cohesion of the adhesive ensures a clean cut of the laminated substrates, without deposit on the knives, and without creep of adhesive 3 towards the edge of the cut laminate.
• It is also a low odor adhesive which ensures no migration through the front sheet and towards the edges, and which resists UN well, which avoids any yellowing which would be visible through the film. support plastic.
• the laminating of the paper 1 and of the cellulose diacetate film 2 is carried out by means of a machine which is well known in this field of the art and which in particular comprises a dispenser for the reel of strong paper 1 and a dispenser for the reel of cellulose diacetate film 2.
• the strong paper unwound from its reel is coated on one of its faces with acrylic adhesive 3 and then applied against the cellulose diacetate film which is also unwound from its reel. In this way, a strong bonding of the strong paper 1 and of the cellulose diacetate film 2 is obtained, the adhesive 3 being sandwiched between these two substrates.
• This lamination is laminated between one or more pairs of cylinders and is then wound into coils.
• FIG. 1 can be passed through an office printer (laser or inkjet) which in particular allows, with each assembly in the form of an A4 sheet, to print business cards.
• office printer laser or inkjet
• the starting materials for the front sheet, for the plastic support film and for the adhesive
• the paper can be colored paper and that it can be more or less rough or smooth, matt or glossy.
• the support plastic film can in particular be loaded with pigments and its free face can be treated to make it receptive to ink. Furthermore, the sheet-shaped assembly has been described more specifically in its application to the production of business cards or the like, but it can obviously be used for very different applications.

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• Laminated Bodies (AREA)
• Sheet Holders (AREA)
• Absorbent Articles And Supports Therefor (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34923687

Family Applications (1)

Country Status (3)

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Family Cites Families (2)

• 2004
  • 2004-04-01 BE BE2004/0168A patent/BE1015966A3/fr not_active IP Right Cessation
• 2005
  • 2005-03-09 WO PCT/BE2005/000033 patent/WO2005095096A2/fr not_active Ceased
  • 2005-03-09 EP EP05714382A patent/EP1729954A2/de not_active Withdrawn

Non-Patent Citations (1)

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