Classifications

• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
  • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
  • G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
  • G09F3/02—Forms or constructions
  • G09F2003/023—Adhesive
  • G09F2003/0242—Adhesive soluble in water
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
  • G09F3/02—Forms or constructions
  • G09F2003/023—Adhesive
  • G09F2003/0248—Variable density of distribution of adhesive spots
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
  • G09F3/02—Forms or constructions
  • G09F2003/023—Adhesive
  • G09F2003/025—Activatable adhesive
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
  • G09F3/02—Forms or constructions
  • G09F2003/0272—Labels for containers

Definitions

• the invention relates to a glass or plastic container with a glued-on label, which consists of a printed, non-embossed single-layer film (monofilm) or printed paper.
• the invention further relates to a method for producing a recyclable packaging, which consists of a plastic container provided with a label, the label consisting of a printed, single-layer, non-embossed film or printed paper, which is fixed to the plastic container by means of an adhesive.
• So-called wet glue labels which are also known as cut or stacked labels, usually consist of paper or a single or multi-layer plastic film. After printing, the labels are cut into the required shape and then stacked. The adhesive with which the label is attached to the glass or plastic container is usually applied on site, i.e. at the customer's site.
• Such labels are used in particular in the beverage industry, here preferably by bottlers who offer the beverage in question in glass bottles. Breweries in particular use paper labels that are attached to the bottle with wet glue. When the bottles are usually cleaned in a caustic soda solution, the paper label is removed from the glass bottle, after which the bottle is refilled, closed and re-labelled.
• plastic containers Compared to glass containers, plastic containers have the particular advantage of being significantly less sensitive to impacts or shocks.
• the use of plastic packaging also makes it possible to save significant amounts of weight, which is why packaging made of polyethylene, polypropylene or polyethylene terephthalate has become established in many areas of the beverage market.
• plastics are also recyclable and can be reused to make equivalent plastic products, provided the product is of appropriate purity.
• Conventional plastic packaging which is used for liquids or creams, for example, has an attached label that has various requirements. The label should adhere well to the container during normal use and should not detach from the container, especially under different temperatures, light and humidity.
• the label serves to declare the container and in particular provides information about the contents of the bottle, any brands, compositions or other product information printed on the label, the label prints should be abrasion-resistant under normal conditions of use, which is why frontally printed labels are often laminated or laminated protective layer.
• Conventional adhesive labels are constructed in multiple layers and consist of an upper material and a carrier material, which are connected to each other using a pressure-sensitive adhesive.
• an outer material is first produced, which can be a plastic film, for example, and the carrier material is made from paper, cardboard, cardboard ash or plastic.
• the carrier material is then coated on one side with a silicone layer, onto which a pressure-sensitive adhesive layer is applied, which ultimately serves to connect the upper material to the carrier material.
• the adhesive label composite produced in this way is wound onto rolls according to the state of the art and added to the printing process, after which the individual adhesive labels are punched out of the adhesive label composite. Due to the silicone layer deposited on the carrier material, the pressure-sensitive adhesive only sticks to the outer material, which means that it can be attached to packaging as an adhesive label.
• respective material supplies of the carrier, the adhesive and the outer material, which come from different manufacturers, must be delivered.
• the adhesive material manufacturer must obtain the film to be printed from the film supplier or paper from the paper supplier as well as the siliconized carrier from the manufacturer of such a carrier film. After the film is connected to the carrier, this composite is transported to the label manufacturer. The transport routes outlined lead to significant CO 2 emissions.
• a limited remedy can be achieved by printing the upper material on one or both sides, ie frontally and/or reversely, and then using a laminating adhesive to create the connection to the upper material. Such a procedure is used, for example, in the EP 2 821 218 B9 described.
• labels In order to be able to easily remove the labels from a container, labels have been developed which consist of a film which deforms in a water bath at a certain temperature of 50°C or more (cf. WO 2010/026163 A1 ). Such deformable labels, in conjunction with suitable adhesives that enable the labels to be removed from a container in an alkaline water bath, have been used successfully, particularly in reusable containers.
• the printed polyolefin or PET film is then laminated on a siliconized carrier and the composite consisting of this carrier and the film is fed to the container for labeling, the materials of the aforementioned parts being chosen so that either a label made of PET on a container made of a polyolefin or a label made of a polyolefin is glued to a PET container, so that the flakes with adhering label parts resulting after shredding the container provided with a label are separated from adhering label parts in a warm washing solution with a temperature of ⁇ 50 ° C and the floating parts made of pure polyolefin and the material-related sinking parts made of PET can be separated from each other and can be recycled after separation.
• the prerequisite for implementation is that the size of the shredded particles in the washing solution causes the washing liquid to penetrate into the adhesive layer and dissolve it.
• a water-based adhesive is not arranged over the entire surface, but only partially between the label and the glass or plastic container.
• the partial adhesive application can form any regular or irregular shapes.
• the adhesive can be in the form of a grid with linear or wavy longitudinal and Cross struts, as a punctual pattern with essentially evenly distributed adhesive dots, each with a small volume cross section, or in the form of concentrically arranged circular paths.
• the label edge has several places where there is no adhesive, so that the washing liquid can flow into the space between the label and the container at these target penetration points and can otherwise dissolve the adhesive.
• the label is made of a monomaterial, which can be a film or a paper.
• the monomaterial is first printed and then the adhesive is applied in a partial engraving.
• the amount of adhesive coating and the partial coating application pattern can be controlled using metering devices and stencils. Because only a partial adhesive coating is used, significant amounts of adhesive can be saved. The reduced adhesive coating ultimately serves to improve the CO 2 balance.
• Adhesives that can be used are based, for example, on polymers such as PVOH, EVA and PVAC.
• a single-layer film made of a material that has a significantly different density to the other plastic material used facilitates the recovery of a single pure plastic.
• the film is printed digitally. This has the advantage that no solvents can get into the washing liquid when the label is later separated from the container.
• the films used as labels preferably have a thickness between 12 ⁇ m and 50 ⁇ m and are made of PP, PET or PE.
• Metallic printing inks can be used in the EP 1 625 187 Use the printing inks described.
• Metal printing inks that contain metal effect pigments in addition to the dyes and which are used, for example, can also be used US 4,221,953 A , EP 0 803 552 A1 or WO 98/38253 A1 are revealed.
• the method described in claim 3 is also proposed, in which the label consists of a printed, single-layer, non-embossed film or printed paper, which is attached to one by means of a water-based adhesive Plastic container is fixed.
• the adhesive is not arranged over the entire surface, but only partially between the label and the plastic container.
• a water-based or UV hotmelt-based adhesive is preferred as the adhesive.
• the adhesive application quantities are preferably between 12 g/m 2 and 25 g/m 2 .
• Such plastic containers provided with a label can be removed more easily in an alkaline water bath at washing temperatures of 50 ° C or more, whereby the adhesive is dissolved in the washing liquid and the label or, after any shredding, label particles float or sink on the washing liquid, depending on the material used.
• the label material can be easily separated from the plastic container material even without maintaining a minimum shredding size.
• the digitally applied printing inks used are solvent-free, which saves disposal costs.
• embossing foil waste is avoided from the outset.
• significant recycling costs can be saved and the existing material can be recycled practically 100%.
• the material restriction also allows transport costs for otherwise necessary supplier products to be saved.
• plastic films partially coated with adhesive can replace wet glue paper labels.
• the present invention advantageously dispenses with material such as that which occurs when using separating layers or when using silicone carrier layers or when painting printed films.
• material such as that which occurs when using separating layers or when using silicone carrier layers or when painting printed films.
• This as well as the economical use of adhesive and the use of digital printing, leads to significant savings.
• those in the WO 2019/192651 A1 Take advantage of the advantages described using the method described there by digitally printing a single-layer monofilm frontally and/or reversely and disposing of the waste material that occurs before and during digital printing as recycling material and reusing it, with the adhesive only being added to the print after printing is applied according to the invention.
• a 20 ⁇ m thick PET film with digital multiple printing has been coated with a PVA adhesive in such a way that in each of the adjacent squares with an edge length of 1 cm in the middle there is an adhesive plug with a diameter of 2 mm and one Height of 5 mm was arranged.
• This PET film was fixed on a PE bottle.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Details Of Rigid Or Semi-Rigid Containers (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

Country Status (2)

Citations (11)

Family Cites Families (1)

• 2022
  • 2022-04-05 DE DE102022108100.1A patent/DE102022108100A1/de active Pending
• 2023
  • 2023-04-04 EP EP23166516.7A patent/EP4258247A1/fr active Pending

Patent Citations (11)

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