Under the development direction of the hottest pla

2022-08-06
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The "development" direction of plastic packaging (Part 2)

biaxially oriented nylon 66 heat-resistant film is used to replace biaxially oriented nylon 6 packaging food, and its high temperature resistance reaches 140 ℃; The fresh-keeping film has good sealing and mould resistance, and no condensation; Water regulating film can absorb ethylene gas released from fruits; The new special food packaging film can improve the fragrance retention of food packaging; The transparency of amorphous nylon film is similar to that of glass; High shielding film can keep the stability of color, aroma, taste, nutritional index and taste quality; The metal protective film adopts LDPE modified film to pack liquid products, which can be heat sealed in low temperature environment; PP synthetic paper is used to improve the light resistance, cold resistance, heat resistance, water resistance, moisture resistance, grease resistance, acid resistance, alkali resistance and impact resistance of the package

develop coextrusion packaging films and sheets

contemporary PP, PE and PVC color changing plastic sheets developed by Zhang en Industrial Company in Taiwan can be made into various cups, lighter shells, cups, wine glasses, straw and other plastic products. When the temperature in the cup and shell changes, the cup color and shell color also change. Japan polystyrene Paper Co., Ltd. developed and introduced co extruded foamed PE sheet, PS sheet, foamed PE molding products and PP molding products with excellent shielding performance

for example, PP with a melt index of 7 g/10 phr and 4% PVC nonylphenyl ether are mixed to produce 7 μ M OPP film with excellent self-adhesive and heat resistance

development of packaging containers

some new plastic processes have been introduced abroad. In the European market, PVC transparent coiled material has been introduced to replace blow molding hollow containers, which can reduce the weight by 50%. In the 5-9 layer coextrusion film process, recycled plastic is used as the intermediate layer, which can reduce the cost under slow and uniform loading, and the layer thickness is controlled by micro processing feedback. Japan introduced pet and PC coextrusion, which not only improved the heat resistance, impact resistance, pollution resistance and drug resistance, but also decreased the price. PP foaming shrinkage standard sleeve is used for glass bottles, which can resist 90 ℃ pasteurization hot filling. The United Kingdom launched the plastic cup and composite cup (outer PSP, inner PP, cover PS) for the current foreign-style sponge pulling machine, which are packed and bottled with special PP resin, can achieve light weight, high strength, uniform thickness and save raw materials, and can package cold and hot drinks, wine and convenience food. France uses PE bottles to pack fructose and yogurt, while Germany uses PC bottles to pack milk. In foreign countries, food and cosmetics are packaged in multi-layer molded cans, and composite cans are used as packaging materials. The soft plastic barrel packaging barrel beverage is processed with PE or mixed with EVA, which is suitable for liquid packaging

the development trend of turnover boxes abroad is standardization, serialization, matching and specialization. Attention should be paid to anti-aging, anti-skid, stable stacking height (positioning), overlapping, increasing R angle, corner strengthening, thin-walled, light weight and high strength

a large number of special plastic cover products suitable for various standards and applications have been developed in foreign countries. Renault of the United States uses aluminum foil, paper and PE as bottle caps, and heat shrinkable film caps in Europe replace aluminum caps. Japan has introduced a cover made of heat-resistant plastic ultradur, which can protect power semiconductors from external factors such as moisture, dust and temperature changes. The high-temperature 280 ℃ coating bottle has six series of specifications of CPI coating aluminum foil caps, It is used as a bottle for lactic acid beverage (the high-frequency heat sealing temperature of aluminum foil reaches 180, and the kink strength will rapidly drop to ℃~ 280 ℃)

development of packaging technology

the common technologies for film heat sealing abroad include: 1. Ultrasonic method. The heat sealing time for PP, pet, PE, PVC, PA, coated paper and thermoplastic coated aluminum foil is less than 1 ~ 3 seconds. The heat sealing performance of PP film can be improved by coating PVDC and FLUOROACETIC acid on the surface of PP film

popular packaging technologies abroad include: vacuum packaging (76cm/hg), 100 ℃ sterilization, pe/pet, pa/eva and other packaging of cooked food products; Inflatable packaging (CO2, O2, N2, ethanol gas) is widely used in food packaging; Modified atmosphere packaging is used to package fish products; Body fitted packaging uses ionic film instead of PE and PVC film; The fresh-keeping package is packed with microporous breathable film, silicon film and other fresh fruits and vegetables with breathing regularity; Sterilization packaging: high temperature for a short time, ultra-high temperature for instantaneous heating to kill contaminating bacteria, pasteurized packaged drinks; Aseptic packaging, sterilization and packaging of fruit juice and other beverages; The sterilization package adopts ionic film, sterilizes with epoxy ethylene gas, and packages medical devices; Blister packaging is mainly used for tablet packaging; Antirust packaging add antirust agent in the film to package precision instruments; Stretch wrapping is mainly wrapped by unit packaging (pallet, pallet, etc.); Heat shrinkable packaging is mainly used for small parts packaging; Mould proof packaging: add mould proof agent to the film to pack the fabric; Compression packaging is mainly used to pack light cotton padded clothes, down, etc; The shockproof and buffer packaging adopts soft polyurethane, PVC, foamed PE, PP, LLDPE, ionic polymer and other packaging materials

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