Multi-layer co-extruded paper-like liquid packaging film

Abstract

In recent years, with the increasing demand of people for dairy products and the unceasing development of ultra heat treated (UHT) sterilization technology, people need more and more packaging films of various dairy products and liquid foods. According to incomplete statistics, in 2009, the weight of the films used for only packaging milk is up to 7,200 ton (year). Because of the large amount and the characteristics of the liquid foods, and because the liquid packaging film is manufactured from 100 percent plastic raw materials or is synthesized from paper, a plastic and metal aluminum and the liquid foods cannot be packaged by a biodegradable packaging material, great pressure is put on environmental protection, at the same time, a large amount of petroleum resources is consumed, paper making puts pressure on environment and the paper, plastic and aluminum film structures cannot be recycled. Therefore, a material for packaging liquid, particularly a multi-layer liquid packaging film structure used for packaging liquid dairy products and reducing the consumption of the petroleum resources, is still needed. On the one hand, the invention provides a multi-layer film which is used for packaging liquid materials and can greatly reduce plastic materials.

Description

Background technique: [0001] In recent years, with the increasing demand for dairy products and the continuous development of UHT sterilization technology, the demand for packaging films for various dairy products and liquid food is also increasing. According to incomplete statistics, in 2009, the amount of film used for milk packaging alone reached 7,200 tons (yearly). Such a large amount, coupled with the characteristics of liquid food itself, all use 100% plastic raw materials, the liquid produced Packaging film, or synthetic liquid packaging film made of paper, plastic, metal and aluminum, cannot use biodegradable packaging materials to package liquid food at all, so it brings huge pressure to environmental protection, and also consumes a lot of petroleum resources, and Papermaking puts pressure on the environment, and paper, plastic, and aluminum film structures cannot be recycled at all. [0002] Therefore, there is still a need in the art for a material that can be use...

AI Technical Summary

Problems solved by technology

According to incomplete statistics, in 2009, the amount of film used in milk packaging alone reached 7,200 tons (year). Such a large amount, coupled with the characteristics of liquid food itself, all use 100% plastic raw materials. Packaging film, or synthetic liquid packaging film made of paper, plastic, and metal aluminum, cannot use biodegradable packaging materials to package liquid food at all, so it brings huge pressure to environmental protection, and also consumes a lot of petroleum resources, and The pressure brought by papermaking to the environment, at the same time, paper, plastic, and aluminum film structures cannot be recycled and reused at all