Plastic products are developing rapidly
The Development Trend of plastics can be summarized into two aspects. Improve performance, that is, modify existing varieties by various methods to improve their comprehensive performance; The second is to develop functions, that is, to develop polymer materials with physical functions such as light, electricity and magnetism, so that plastics can have photoelectric effect, thermoelectric effect and piezoelectric effect. Judging from the current development speed of the World plastic industry, Germany and Sweden rank first, Japan and some European countries rank second, and the United States is slow.
plastic products, rapid biodegradable waste plastics, and comprehensive technology for recycling plastics.
For example, some European and American manufacturers adopt linear ethylene-α alkene copolymer and ethylene- Vinyl acetate copolymer mixture/PA bag, suitable for packaging ice cream, cream and other foods. A large number of multifunctional composite films have been developed to further refine their functions. For example: cold-resistant film can withstand-18 ℃ ,-20 ℃ ,-35 ℃ low temperature environment; The moisture-proof film made of PP moisture-proof treatment can be divided into several types: moisture-proof, anti-condensation, anti-steaming, and adjustable moisture.
Anti-corrosion film can pack perishable, acidic and sweet foods; Friction film stacking is stable; Special PE film is chemical and corrosion resistant; Anti-mite film is added with odor-free anti-mite; Replace the two-way stretch nylon 6 packaged food with a heat-resistant film of two-way stretch nylon 66, which has a high temperature resistance of 140 ℃; The new special food packaging film can improve the fragrance of food packaging; Amorphous nylon film transparency similar to glass; The high-shielding film can preserve color, fragrance, taste, nutritional index and stability of taste quality.
The metal protective film is packaged in liquid products with LDPE modified film and can be heat sealed in low temperature environment; PP synthetic paper is used to improve the light resistance, moisture resistance, heat resistance, water resistance, moisture resistance, oil Fat Resistance, acid resistance, alkali resistance and impact resistance of the package. At present, plastic cups and composite cups are popular abroad (Outer PSP, inner PP, cover PS)Packing cold, hot drinks, wine, convenience food. France uses PE bottles to pack fructose and yogurt, while Germany uses pc bottles to pack milk. Our country uses PE bottles to pack medicines, etc.