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Environment-friendly light-proof double-layer waterproof packaging bag and preparation method thereof

A packaging bag and light-shielding technology, which is applied in the field of food packaging, can solve the problems of increased kraft paper price, easy damage on the surface, and non-environmental protection of paper-plastic composite bags, and achieve high light-shielding performance, strength performance, weather resistance, and cleanliness And waterproof, easy to recycle the effect

Active Publication Date: 2019-02-22
GUANGZHOU XINWEN PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Paper-plastic composite packaging bags have always been used for packaging products that require high light-proof performance, such as modified plastic products. Traditional paper-plastic composite packaging bags provide better light-proof performance because of a layer of kraft paper with extremely poor light transmission. , plus a composite layer of film and plastic woven base cloth to provide strength performance, it is deeply loved by modified plastic manufacturers. At present, the proportion of paper-plastic composite bags in the modified plastic industry is as high as 95%, but with the recent environmental protection With the strengthening of awareness, the non-environmental properties of paper-plastic composite bags are gradually emerging. The price of domestic kraft paper has doubled. It is difficult to separate and recycle after being compounded with plastics. Multi-layer waterproof packaging bags have become the hot spot of current research

Method used

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  • Environment-friendly light-proof double-layer waterproof packaging bag and preparation method thereof
  • Environment-friendly light-proof double-layer waterproof packaging bag and preparation method thereof
  • Environment-friendly light-proof double-layer waterproof packaging bag and preparation method thereof

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preparation example Construction

[0072] The second aspect of the present invention provides a method for preparing an environmentally friendly light-proof double-layer waterproof packaging bag, the steps comprising:

[0073] (1) Wire drawing: Stir the raw materials for the preparation of the plastic woven cloth layer according to a certain ratio, extrude into a film after heating, cut into strips after cooling in a water tank, and then stretch 5-6 times in a heating oven After being shaped and cooled, it is wound into a silk ingot to complete the production of silk;

[0074] (2) Weaving: put the coiled silk on the weaving machine, arrange it according to different specifications, weave it into a tube material crosswise in the warp and weft directions, cut it into pieces with a hot knife, and wind it up into a base cloth roll;

[0075] (3) Composite bag making: put the base material cloth roll on the compound machine, enter the surface layer compound device after preheating, stir the imitation kraft paper plas...

Embodiment 1

[0080] Embodiment 1 provides an environment-friendly light-proof double-layer waterproof packaging bag, the packaging bag includes a surface layer, a middle layer, and an inner layer; the surface layer is a plastic layer imitating kraft paper, the middle layer is a plastic woven cloth layer, and the inner layer is a pure plastic film layer.

[0081] The imitation kraft paper plastic layer 20g / m 2 , the plastic woven cloth layer 70g / m 2 , the pure plastic film 20g / m 2 .

[0082] In parts by weight, the raw materials for the preparation of the imitation kraft paper plastic layer include: 10 parts of polyethylene resin, 50 parts of polypropylene resin, 0.01 part of polyethylene wax, 0.01 part of antioxidant, 1 part of titanium dioxide, 0.1 part of tartrazine, Lisol Baohong bk 0.05 parts.

[0083] In parts by weight, the raw materials for preparing the plastic woven cloth layer include: 10 parts of polyethylene resin, 50 parts of polypropylene resin, 0.01 part of polyethylene wa...

Embodiment 2

[0104] Embodiment 2 provides an environment-friendly light-proof double-layer waterproof packaging bag, the packaging bag includes a surface layer, a middle layer, and an inner layer; the surface layer is a plastic layer imitating kraft paper, the middle layer is a plastic woven cloth layer, and the inner layer is a pure plastic film layer.

[0105] The imitation kraft paper plastic layer 25g / m 2 , the plastic woven cloth layer 80g / m 2 , the pure plastic film 25g / m 2 .

[0106] In parts by weight, the raw materials for the preparation of the imitation kraft paper plastic layer include: 50 parts of polyethylene resin, 100 parts of polypropylene resin, 5 parts of polyethylene wax, 0.3 parts of antioxidant, 10 parts of titanium dioxide, 1 part of tartrazine, 1 serving of Lisol Baohong bk.

[0107] In parts by weight, the raw materials for preparing the plastic woven cloth layer include: 50 parts of polyethylene resin, 98 parts of polypropylene resin, 5 parts of polyethylene w...

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Abstract

The invention relates to the technical field of food packaging, in particular to an environment-friendly light-proof double-layer waterproof packaging bag and a preparation method thereof. The packaging bag comprises a surface layer, a middle layer and an inner layer, wherein the surface layer is an imitation kraft paper plastic layer, the middle layer is a plastic woven fabric layer, and the inner layer is a pure plastic film layer. According to the environment-friendly light-proof double-layer waterproof packaging bag and the preparation method thereof, novel light-proof multi-layer waterproof packaging bags prepared through the preparation method adopt a pure plastic raw material for production, and have excellent light-proof performance, strength performance, weather resistance, cleanliness and waterproof performance, so that the packaging bags are more environment-friendly and easy to recycle due to the fact that paper is not used.

Description

technical field [0001] The invention belongs to the technical field of food packaging, and more specifically, the invention relates to an environment-friendly light-shielding double-layer waterproof packaging bag and a preparation method thereof. Background technique [0002] Since my country joined the WTO, people's living standards have been greatly improved, and many national economy and people's livelihood industries such as the domestic manufacturing industry, food industry, and pharmaceutical industry have developed rapidly. Behind these industries is a huge packaging market. Over the past ten years, packaging bag materials have been continuously updated, gradually developing from traditional materials such as rattan, wood, cotton, thread, paper, and metal to artificial composite advanced materials. For example, plastics are widely used to make material packaging bags due to their characteristics of low price, quality control, easy portability, easy processing and dive...

Claims

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Application Information

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IPC IPC(8): B65D30/08B32B27/32B32B27/06B32B27/18B32B27/20B32B27/12B32B33/00
CPCB32B27/08B32B27/12B32B27/18B32B27/20B32B27/32B32B33/00B32B2250/242B32B2262/0253B32B2307/41B32B2307/552B32B2439/70B65D31/02Y02W30/80
Inventor 陆伟錩
Owner GUANGZHOU XINWEN PLASTIC
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