The hottest global food plastic packaging develops

The rapid development of global food plastic packaging

in recent years, due to the implementation of new measures such as strong alliance and transnational cooperation in the global packaging industry, the world packaging industry, especially food plastic packaging, has made great progress, and new materials, new processes, new technologies and new products continue to emerge

development of multifunctional composite membrane

a large number of multifunctional composite membranes have been developed abroad to further refine their functions. For example, the cold resistant membrane can withstand -18 ℃, -20 ℃, -35 ℃ low temperature environment; The series of moisture-proof films made of PP by moisture-proof treatment can be divided into moisture-proof, anti condensation, anti steam, adjustable moisture and other types; The anti-corrosion film can package perishable, acidic and sweet foods; Stable stacking of friction film; Special PE film corrosion resistance; Odorless insect repellent is added to the mothproof film; Biaxially Stretched Nylon 66 heat-resistant film replaces Biaxially Stretched Nylon 6 film to package food, which can withstand 140 ℃ high temperature; The fresh-keeping film has good sealing and mildew resistance, and there is no condensation and condensation; Water regulating membrane can absorb ethylene gas released by 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 maintain the stability of color, aroma, taste, nutritional indicators and taste quality; The metal protective film adopts LDPE modified film to package liquid products, which can be heat sealed in low temperature environment

development of modified copolymers

at present, some European and American countries have invested heavily in the development of non-polar and polar ethylene copolymers to improve the tensile and coextrusion properties of plastic films, improve transparency, enhance stability, and improve molecular weight distribution and extrusion rheological properties. In the contemporary injection molding process, countries are replacing LLDPE, PP, EVA and PVC with VLDPE (ultra low density polyethylene). In extrusion, injection molding and blow molding processes, VLDPE will occupy the flexible packaging market of medicine, medical treatment and cosmetics, and will impact the field of food packaging

experts believe that the development of the plastic industry in the contemporary world focuses on plastic modification, coating of plastic products, rapid biodegradation of waste plastics and recycling of plastics. Some European and American manufacturers have used linear ethylene- α Ethylene vinyl acetate copolymer and ethylene vinyl acetate copolymer are mixed to produce PA bags, which are suitable for packaging ice cream, milk fat and other foods. It is particularly worth mentioning that pen (polyethylene naphthalate) "new polyester" packaging material attracts attention in the plastic packaging industry. Because the molecular structure of pen is similar to that of pet (polyethylene terephthalate), but the benzene ring is replaced by naphthalene ring, pen has better barrier property than pet, especially gas barrier property and UV resistance linearity, and its heat resistance is also good (the thermal deformation temperature of ordinary amorphous pen is 100 ℃, while that of pet is only 70 ℃). With the industrial production of pen, pen will enter the field of food packaging in the near future, triggering another packaging revolution after pet

develop metallocene plastics

metallocene is an organometallic coordination compound formed by the connection of transition metals and cyclopentadiene. Metallocene polyolefins are polymers prepared by olefin polymerization with metallocene coordination compounds as catalysts. Metallocene polymers have many advantages, such as good processability, high strength, high rigidity and good transparency, so they have attracted people's attention and many new varieties have been introduced

metallocene plastics will directly impact PP, MDPE, LLDPE, elastomer and other plastic markets. At present, the demand for PE in the world market is 40million tons, which is expected to increase to 50million tons by 2005. What preparations should be made before the installation of adhesive peel strength tester? Jinan Shijin today provides you with the correct method: metallocene polyethylene. Metallocene plastics have many advantages, such as good gloss, high melt strength and good film stability, which are suitable for the field of food packaging

improve containers for packaging

nowadays, some new plastic processes have been introduced abroad, and in Europe, 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, using recycled plastic as the intermediate layer can reduce the cost, and the layer thickness is controlled by micro processing feedback. Japan introduced the co extrusion process of pet and PC, which not only improved the heat resistance, impact resistance, pollution resistance and drug resistance, but also reduced the price. PP foaming shrinkage standard sleeve is used for glass bottles, which is suitable for 90 ℃ pasteurization hot filling. The UK introduced special PP resin injection blow packaging to hold the sample for the test bottle, which can achieve the purpose of light weight, high strength, uniform thickness and saving raw materials

nowadays, plastic cups and composite cups (outer PSP, inner PP, cover PS) are popular in foreign countries to package hot and cold drinks, wine and convenience food. France uses PE bottles to pack fructose and yogurt, while Germany uses PC bottles to pack milk. Some countries also use PE or its soft plastic barrels mixed with EVA to package drinks

at present, foreign countries are developing a large number of special plastic cover products that adapt to various standards and uses. For example, Renault uses aluminum foil, paper and PE as bottle caps; In Europe, the aluminum cover is replaced by the heat shrinkable film cover; Japan has introduced a 280 ℃ high temperature resistant coating bottle and CPI coating aluminum with six series specifications. The strain at a certain point of an elastic element is proportional to the force on the elastic element, which is used to pack lactic acid drinks, etc