New processes for plastic flexible packaging films

Active Plastic Film

A company in Australia has successfully developed an active plastic packaging film that can keep packaged perishable products such as fresh fruits, vegetables and flowers fresh for several weeks, effectively solving the problem of long-distance transport of these products. This packaging film with good freshness-preserving performance is a breathable film that allows the carbon dioxide and oxygen produced to pass through, keeping perishable products in a sleeping state. The film is impregnated with organic chemicals that can absorb ethylene, which promotes the ripening of fruits and vegetables, and keep the surroundings of perishable products moist; at the same time, because the film contains traces of a slow-release fungicide, it can also inhibit the growth of mold. Therefore, the freshness period of packaged fruits and vegetables can be extended

Competition in plastic films is becoming increasingly fierce, and people are attaching more and more importance to better shrinkage and lower cost of films, so many companies have launched polystyrene resins with better performance. Shrink films made from raw materials such as corn have now appeared, and such films are highly environmentally friendly and recyclable. In addition, low-shrinkage

films also have a large market, as they can easily fit into enterprises' existing recycling systems. Recently, heat-shrink film labels have become very popular in consumer goods packaging,

and such films hold a large share of the market.

Coextruded film is the latest technological development trend in the packaging film industry. This film uses ordinary inks and coatings and offers high barrier properties, good transparency, heat sealability and flexibility in layout printing, and can be used as a plasma coating material. The development of coextruded packaging film will change the product structure of multifunctional films and is suitable for food packaging such as beverages, milk and fresh meat. In developed countries, coextruded packaging film accounts for about

%, while in China it accounts for only

This film is made from natural edible substances (such as polysaccharides and proteins) as raw materials, and is formed through interactions between different molecules into a film with a porous network structure. It can be applied to the inner packaging of various ready-to-eat foods and has a huge market in the food industry.

This film mainly addresses the contradiction that some packaging materials that are not easily degradable are difficult to recycle, that burying them underground damages soil structure, and that incineration produces toxic gases causing air pollution. Degradable plastic packaging film not only has the functions and characteristics of traditional plastics, but can also degrade in the natural environment after its service life ends, through the action of microorganisms in soil and water or through the action of ultraviolet light in sunlight. The application of degradable plastic products in packaging has already covered ordinary packaging films, shrink films, shopping bags, garbage bags and so on, playing a positive role in improving the environment.

As a novel green packaging material, water-soluble plastic packaging film is widely used in the packaging of various products in European and American countries, Japan and other countries. Because of its environmental characteristics such as thorough degradation and safe, convenient use, water-soluble film has attracted the attention of developed countries around the world. At present, such products are mainly produced and sold by enterprises in Japan, the United States, France and other countries abroad, and domestic enterprises have also begun production, with their products now entering the market.

This article is reprinted from China Packaging Network (pack.cn). Original link: http://news.pack.cn/show-377052.html. All rights belong to the original author; this article is for industry exchange and learning only.