Composite membrane, preparation method of composite membrane and mold for preparing easy-to-tear strip

A technology of composite film and easy-tearing thread, which is applied in the field of packaging materials, can solve problems such as poor tearability, affecting use and appearance, and achieve the effect of improving bonding strength, increasing bonding performance, and good bonding

Active Publication Date: 2015-11-25
ZHEJIANG GOLDSTONE PACKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that are poor in tearability and affect use and appearance after tearing, thereby providing a composite film

Method used

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  • Composite membrane, preparation method of composite membrane and mold for preparing easy-to-tear strip
  • Composite membrane, preparation method of composite membrane and mold for preparing easy-to-tear strip
  • Composite membrane, preparation method of composite membrane and mold for preparing easy-to-tear strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The composite film of this embodiment includes a paper layer 2, an aluminum foil layer 4 and an inner layer 6 bonded in sequence, and the paper layer 2 is provided with any form of easy-tear structure described above. Wherein, the inner layer is made of 40wt% styrene-butadiene copolymer, 25wt% HDPE and 35wt% LDPE mixed homogeneously and then blow-molded at 165°C.

[0046] Such as figure 2 Shown, the preparation method of the composite membrane of the present application is,

[0047] (1) Make easy-tear lines on the paper layer.

[0048] (2) Coat one side of the aluminum foil layer with an adhesive, and dry it in a three-stage oven at 70°C, 75°C, and 80°C successively at a speed of 200 m / min to obtain the first adhesive layer 3. Under the condition of 50°C, the paper layer and the first adhesive layer are hot-compressed together.

[0049] (3) Coat the other side of the aluminum foil layer with an adhesive, and dry it in a three-stage oven at 50°C, 60°C, and 70°C succe...

Embodiment 2

[0052] The composite film of this embodiment includes a paper layer 2, an aluminum foil layer 4 and an inner layer 6 bonded in sequence, and the paper layer 2 is provided with any form of easy-tear structure described above. Wherein, the inner layer is made of 40wt% styrene-butadiene copolymer, 15wt% HDPE and 45wt% LDPE mixed uniformly, and then blow-molded at 165°C.

[0053] Such as figure 2 Shown, the preparation method of the composite membrane of the present application is,

[0054] (1) Make easy-tear lines on the paper layer.

[0055] (2) Coat one side of the aluminum foil layer with an adhesive, and dry it in a three-stage oven at 75°C, 85°C, and 95°C successively at a speed of 190 m / min to obtain the first adhesive layer 3. Under the condition of 70°C, the paper layer and the first adhesive layer are hot-compressed together.

[0056] (3) Coat the other side of the aluminum foil layer with an adhesive, and dry it in a three-stage oven at 60°C, 70°C, and 80°C successi...

Embodiment 3

[0060] The composite film of this embodiment includes a paper layer 2, an aluminum foil layer 4 and an inner layer 6 bonded in sequence, and the paper layer 2 is provided with any form of easy-tear structure described above. Wherein, the inner layer is made of 30wt% styrene-butadiene copolymer, 20wt% HDPE and 50wt% LDPE mixed uniformly and then blow-molded at 165°C.

[0061] Such as figure 2 Shown, the preparation method of the composite membrane of the present application is,

[0062] (1) Printing on the paper layer.

[0063] (2) Make easy-tear lines on the paper layer.

[0064] (3) Coat one side of the aluminum foil layer with an adhesive, and dry it in a three-stage oven at 72°C, 80°C, and 90°C successively at a speed of 180 m / min to obtain the first adhesive layer 3. Under the condition of 60°C, the paper layer and the first adhesive layer are heat-compressed together.

[0065] (4) Coat the other side of the aluminum foil layer with an adhesive, and dry it in a three-...

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Abstract

The invention provides a composite membrane, a preparation method of the composite membrane and a mold for preparing an easy-to-tear strip. The composite membrane comprises a paper layer, an aluminum foil layer and an inner layer which are sequentially bonded together, wherein the inner layer is prepared from materials by total weight as follows: a 20%-40% of styrene-butadiene copolymer, a 15%-25% of HDPE (high-density polyethylene) and 35%-60% of LDPE (low-density polyethylene), and easy-to-tear structures are arranged on the paper layer and form the easy-to-tear strip. Easy-to-tear performance tests prove that force required when a package is torn along a tear strip is far smaller than that in a position without an easy-to-tear strip and that of a composite membrane without an easy-to-tear strip. Besides, the tearing position can be limited through the easy-to-tear strip, the tearing position of the package can be identical to a preconceived or designed position, and the usability and the attractiveness of the torn package are guaranteed.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a composite film, and also relates to a method for making the composite film and a mold for making easy-to-tear threads. Background technique [0002] Aluminum foil composite film is a common composite film, the important component of which is aluminum foil. Because aluminum foil has the advantages of good mechanical strength, light weight, good shading, not easy to be corroded, good barrier property, moisture-proof and waterproof, and strong air-tightness, the aluminum foil composite film made of aluminum foil is widely used in pharmaceutical packaging substrates, High-temperature cooking food packaging, barrier packaging (flavors, spices) and electromagnetic shielding packaging, etc. For packaging materials with good airtightness, its tearability is an important criterion that affects the user experience. [0003] Aluminum foil composite film in the prior art is usually mad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/12B32B37/12B32B37/10B26D1/14
CPCB26D1/141B32B15/12B32B37/10B32B37/1284B32B2439/00
Inventor 曾文明张文锋赵向阳孙国锦
Owner ZHEJIANG GOLDSTONE PACKING
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