Packaging bag with high resistance to environmental stress cracking

Abstract

The invention discloses a packaging bag with high resistance to environmental stress cracking. The packaging bag comprises a fabric body, and the fabric body sequentially comprises an anti-stick coating, a waterproof coating and a woven fabric outer layer from inside to outside; the waterproof coating is a combination of perfluoroalkyl silane resin and PU resin; the anti-stick coating is a mixtureof PP and PE; the woven fabric outer layer comprises, by weight, 60-75 parts of isotactic polypropylene, 10-20 parts of atactic polypropylene, 8-15 parts of high-density polyethylene, 5-12 parts of polyolefin elastomers and 4-10 parts of a performance reinforcing agent; the performance reinforcing agent comprises, by weight, 20-30 parts of mica powder, 50-65 parts of ultrafine talcum powder and 10-20 parts of ultrafine calcium carbonate. A woven fabric of the packaging bag adopts isotactic polypropylene as a base material, high-density polyethylene is added for improving the flexibility of apolymer, atactic polypropylene and the polyolefin elastomers are added and can simultaneously achieve the effects of plasticizing, toughening and reinforcing a blend, and the toughness of a weaving layer can be improved in an orientation direction.

Description

technical field [0001] The invention relates to the technical field of packaging bags, in particular to a packaging bag with high resistance to environmental stress cracking. Background technique [0002] As an important product of petrochemical industry, asphalt has been widely used in road and engineering construction and other fields. The annual output of asphalt in my country is about 25 million tons. For a long time, the traditional packaging method of asphalt is paper bag or iron drum, iron drum Generally, the cost is high, and it takes up a lot of space, and it needs to be heated repeatedly during use, the transportation cost increases, and the leakage accident cannot be avoided, and the asphalt often adheres to the asphalt bucket, resulting in waste; in addition, due to the inherent characteristics of asphalt itself and Storage and transportation requirements have special requirements for its packaging. Generally, the packaging bag material must have high strength. If ...

AI Technical Summary

Problems solved by technology

[0002] As an important product of petrochemical industry, asphalt has been widely used in road and engineering construction and other fields. The annual output of asphalt in my country is about 25 million tons. For a long time, the traditional packaging method of asphalt is paper bag or iron drum, iron drum Generally, the cost is high, and it takes up a lot of space, and it needs to be heated repeatedly during use, the transportation cost increases, and the leakage accident cannot be avoided, and the asphalt often adheres to the asphalt bucket, resulting in waste; in addition, due to the inherent characteristics of asphalt itself and Storage and transportation requirements have special requirements for its packaging. Generally, the packaging bag material must have high strength. If the strength is poor, the packaging bag will be damaged, causing leakage of asphalt in high temperature environments, and causing safety hazards to the environment; and The traditional paper bag packaging often has insufficient strength when used, and it is not easy to peel off the asphalt, resulting in adhesion, which causes inconvenience in the subsequent processing process

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