Composite packaging film as well as preparation method and application thereof

A composite packaging film and packaging film technology, applied in the field of packaging materials, can solve problems such as high energy consumption, narrow use range, and inability to recycle, and achieve high application value and increase the recovery rate.

Active Publication Date: 2021-05-14
上海紫江彩印包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above three paper-aluminum-plastic packaging film structures all include an adhesive layer, because it is necessary to use an adhesive layer to connect the isolation layer, the heat-sealing layer, etc., to form a thermosetting crosslinking, and then form an insoluble and infusible connection layer; As a result, it is difficult to separate packaging waste materials and cannot be recycled, especially on automatic separation and screening equipment for plastic waste. Packaging waste can only be treated by chemical methods, which are affected by many factors such as paper fiber type and adhesive type. restrictions, high energy consumption, and narrow scope of use; most of them are treated by incineration, which cannot be recycled.

Method used

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  • Composite packaging film as well as preparation method and application thereof
  • Composite packaging film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A composite packaging film, the schematic diagram of the cross-sectional structure is as follows figure 1 As shown, wherein, including a printing layer 1, a first adhesive layer 2, a first separation layer 3, a barrier layer 4, a second separation layer 5, a second adhesive layer 6 and a heat-sealing layer 7 arranged in sequence;

[0042] Printing layer 1 has a grammage of 60g / m 2 coated paper (Stora Enso, Lumiflex); the first adhesive layer 2 is a polyethylene layer with a thickness of 15 μm (Shanghai Zijiang Color Printing Packaging Co., Ltd); the first separation layer 3 is a polyvinyl alcohol coating with a thickness of 1 μm ( Nissyn, EXCEVAL); the barrier layer 4 is an aluminum foil (Xiashun, AA8079 / O) with a thickness of 15 μm; the second separation layer 5 is a polyvinyl alcohol coating (Nissei, EXCEVAL) with a thickness of 1 μm; the second adhesive Layer 6 is a polyethylene layer with a thickness of 15 μm (Shanghai Zijiang Color Printing Packaging Co., Ltd.); h...

Embodiment 2

[0049] A kind of composite packaging film, the section structure is identical with embodiment 1;

[0050] The weight of the printing layer is 40g / m 2 Medical paper (Sappi, 40gsm); the first adhesive layer is an ethylene-vinyl acetate copolymer layer (Shanghai Zijiang Color Printing Packaging Co., Ltd.) with a thickness of 10 μm; the first separation layer is a polyvinyl alcohol coating with a thickness of 0.5 μm layer (Nissan, EXCEVAL); the barrier layer is a metallized polyester film (Tongda, FW) with a thickness of 12 μm; the second separation layer is a polyvinyl alcohol coating (Nissan, EXCEVAL) with a thickness of 0.5 μm; the second The adhesive layer is an ethylene-vinyl acetate copolymer layer (Shanghai Zijiang Color Printing Packaging Co., Ltd.) with a thickness of 10 μm; the heat-sealing layer is a polyethylene layer with a thickness of 25 μm;

[0051] Its preparation method is identical with embodiment 1.

Embodiment 3

[0053] A kind of composite packaging film, its sectional structure is identical with embodiment 1;

[0054] Printing layer 1 has a grammage of 80g / m 2 Kraft paper (Hehe, Chisong); the first adhesive layer is a polyurethane adhesive coating (NOVACOTE, SF2930) with a thickness of 5 μm; the first separation layer is a polyvinyl alcohol coating (Nissei, EXCEVAL) with a thickness of 3 μm ); the barrier layer is a metallized polyolefin film (Jindal, MM488) with a thickness of 18 μm; the second separation layer is a polyvinyl alcohol coating (Nissei, EXCEVAL) with a thickness of 3 μm; the second adhesive layer is a thickness of 5 μm Polyurethane adhesive coating (NOVACOTE, SF735A / CA478); the heat-sealing layer is a polyethylene film with a thickness of 150 μm (Shanghai Zijiang Color Printing Packaging Co., Ltd.);

[0055] Its preparation method is identical with embodiment 1.

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Abstract

The invention provides a composite packaging film as well as a preparation method and application thereof. The composite packaging film comprises a printing layer, a first bonding layer, a first separation layer, a barrier layer, a second separation layer, a second bonding layer and a heat sealing layer which are sequentially arranged, and the first separation layer and the second separation layer are made of water-soluble polymer materials. The separation layer is arranged between the isolation layer and the bonding layer, so that when the composite packaging film is separated through an up-and-down separation method (water bed), each layer in the composite film can be separated within dozens of minutes, and the recovery rate of each layer of material is improved; and due to the arrangement of the separation layer, under the conditions that the content does not contain water and the composite packaging film is not in contact with water in the using process, the composite packaging film has the same performance as a traditional composite packaging film, a user does not need to conduct conversion, and convenience and environment friendliness are achieved.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a composite packaging film and its preparation method and application. Background technique [0002] Paper-aluminum-plastic composite flexible packaging is widely used and is a common method in the production of industry, food, medicine, and medical equipment packaging. Its structure is composed of a variety of materials combined with a two-component adhesive or anchor coating agent combined with molten resin. Mostly, pure aluminum foil or high-barrier coating or metallized film, heat-sealable film is compounded in the base paper layer structure. It is a multi-layer packaging material that combines the respective advantages of the three materials. It is a widely used Packaging Materials. [0003] CN106218049A discloses a paper-aluminum-plastic composite film, comprising: a printing layer, an outer film layer, a first adhesive layer, an aluminum foil layer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/36B32B15/20B32B27/06B32B7/12B32B15/09B32B15/085B32B33/00B65D65/46
CPCB32B27/32B32B27/36B32B15/20B32B27/06B32B7/12B32B15/09B32B15/085B32B33/00B65D65/46B32B2307/50Y02W30/80
Inventor 俞伟彬陈漫里杜青利
Owner 上海紫江彩印包装有限公司
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