New Progress in Paper-based Composite Packaging and Composite Plastic Packaging Technology in Foreign Countries

At present, foreign paper-based composite packaging, its models are: film type, liner bag type, embedded type, liquid type. Because the oil molecules are extremely small, the main technical problem that arises in developing paper-based composite packaging is to solve the problem of seepage prevention. Such as Japan developed a boxed cooking oil compound carton, very successful. The structure of the composite paper is PE/paper/PE/AL/PET/PE, and the diameter of the composite paper is made of 6 layers of aluminum-plastic composite. As the composite layer has aluminum foil, its performance is better than that of plastic bottles and glass bottles. This boxed edible oil-based composite paper box is light, secure, and beautifully printed, improving the value and competitiveness of the goods.

There is also an ultra-strength composite paper that is made by drawing basalt into fibers at a temperature of 2000°C, impregnating the phenolic resin and infiltrating the clay into a thin film. Because of the rock-based material, long-term storage will not become brittle, moldy, and insect-like, and it can be printed in color and used widely. The characteristics of this new type of super-strength composite paper: white as snow, thin as a flap, soft as brocade, and still intact after repeated folding, also known as soft glass, its low price.

At the same time, foreign countries have made rapid progress in developing composite plastic packaging. Such as CT material: Japan has developed a special plastic for food packaging containers - CT. This kind of plastic is made by adding about half of the talc powder from Liaoning Province of China into polypropylene plastic and blending the new composite material. The characteristics of CT are high temperature resistant, its function is similar to that of foam plastic products, but its volume is equivalent to only a quarter of the latter, so that "white pollution" can be alleviated.

Rape plastic packaging materials: Recently, US researchers have developed an easily decomposed rapeseed plastic packaging material. It extracts three kinds of genes that produce plastics from the cells that make biopolymers, and then transfers them to the plants of rapeseed. After a period of time, it produces a plastic polymer liquid that can be obtained after refining. A canola plastic. Plastics or fast food packaging materials made from such rapeseed plastics can be self-degraded.

Wood flour plastic packaging material. Not long ago, Japanese scientists and technicians developed a wood-foil plastic packaging material from pine wood, which was produced by taking out wood flour and then reacting with isocyanate to produce polyurethane. This kind of wood powder plastic has strong heat resistance and can be used to make temperature-resistant packaging bags. This packaging material can be biodegraded after use.