Food films with different functions

In recent years, many new food films with different functions have been developed abroad, which have high application value and broad market prospects.
Food Composition Improver Membranes Because the sweetness of Japanese-made grapes is not enough, there must be a period during which sugar is added for fermentation. However, the use of membrane separation technology to concentrate the raw juice can remove sugar and increase the taste of the wine. Thin-film technology is now also used in the manufacture of low-salt soy sauces, food colorants, or purified juices.
Soybean Concentrated Ultrafiltration Membrane U.S. scientists used membrane separation technology to develop a new polysulfone ultrafiltration membrane with a molecular weight retention of 100,000 to 300,000. It was used to concentrate soybean protein to separate proteins, which can remove odor and 98%. Flatulence sugar.
Fruit-free Ultrafiltration Membrane US South Carolina Agricultural Experiment Station has begun direct ultrafiltration of apple pulp with metal. After crushing the apple, the apple was treated with pectinase and cellulase at 56°C, and without pressure, 2178-7092.75 Pa of pressure was fed into a metal tubular film having a diameter of 3.12 cm to obtain 85% of clear juice. And 86% of the aroma.
Food Oxygen Shrinkable Film US company uses a co-extruded oxyacetylene shrink film, which is used in conjunction with the Deltap horizontal filling and sealing machine, and has a waterproof drop forming performance. In this kind of packaging, with 70% nitrogen and 30% carbon dioxide, its life can be extended to 30 days. Under refrigerated conditions, the residual oxygen in the packaging bag is less than 0.4%, so that the meat inside the package The color and aroma remain unchanged.
Food Heat Shrink Film This heat shrink film further reduces food sealing temperature. The multi-layer heat shrinkable film can also improve the adhesive performance and sealing performance of the food packaging, and improve the preservation effect. The polyolefin film made by using the electron radiation technology and the stretching technology can greatly increase the strength and can enhance the shrinkage sealing performance. And tensile capacity.
Food-Controlled Fresh-keeping Films Hercules Inc. of the United States uses a new food preservative film, which is a packaging material made from a new type of weak polymer. The use of such a film with fine pores can control the exchange of oxygen and carbon dioxide in the package, maintain an optimal atmosphere that can slow the respiration of fruits and vegetables, and can also be used as a label to directly cover the air vent of a sealed container. Combine the proper packaging materials with the characteristics of fresh foods to achieve optimal atmosphere control within the package.
Beverage impermeable membrane DuPont Co., Ltd. manufactures a new type of film for packaging liquid foods. It is made of polyamide, ethylene-vinyl alcohol copolymer, linear low-density polyethylene and SURLYNR and other polymers. It has 5 layers and has excellent Anti-seepage performance and resistance to flex cracking.
Alcohol Diffuse Membrane The Tokyo Institute of Technology's Resource Development Institute has developed a sensory sensor using artificial membranes. It has the function of identifying robots and brings new development to the food industry.