Seven-layer co-extrusion high-isolating packaging film

Abstract

The seven layer high obstruct packing film includes the first printing layer made of LLDPE, LDPE and FSU; the second shading layer made of white color, LLDPE and LDPE; the third adhering layer of adhesive Tie; the fourth obstructing layer comprising EVOH; the fifth adhering layer of adhesive Tie; the sixth shading layer made of black color, LLDPE and LDPE; and the seventh thermal sealing layer made of LLDP, LDPE and FSU. The present invention possesses the advantages of non-toxicity, high humidity resistance, high oxygen resistance, high heat resistance, high flexibility, high cold resistance and high thermal sealing strength, and is used in packing milk without need of adding preservative and being cold stored.

Description

(1) Technical field [0001] The invention relates to a food packaging film, in particular to a seven-layer co-extrusion high barrier packaging film. (2) Background technology [0002] With the development of the national economy and the improvement of people's living standards, my country's beverage industry has developed rapidly, especially soft drinks have developed from a single "soda" before the 1970s to "Coke, Sprite, milk, vegetable juice, Juice, fruit tea, black tea, mineral water and other beverages, and the rapid development of soft drinks has led to the steady and rapid development of the plastic packaging industry. Especially in the dairy industry, the development of liquid milk product packaging technology is particularly rapid. [0003] According to statistics, in China's liquid milk market in 2002, plastic bag milk accounted for 45% of the market share, paper brick-shaped milk accounted for 25% of the market share, plastic bottles accounted for 17%, plastic cups...

AI Technical Summary

Problems solved by technology

[0004] This variety of packaging forms is largely determined by the different preferences of consumers, and bagged milk is occupying a large market share because of its economical benefits and moderate prices. However, the existing bagged milk, Due to its unreasonable structure and selected materials, the barrier resistance and high temperature resistance are poor, it is easy to deform when heated, the strength is not high and it is easy to break, etc.

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