new material

●Ceramic plastic cling film <br> A Japanese company produced a ceramic plastic cling film. It is based on polyethylene resin as a base material, adding 20-30% ceramic powder and special additives, and then diluted and filmed. The use of the cling film packaging food, its preservation effect is through the far-infrared radiation released by the ceramic, so that the internal structure of the food to readjust the content, so as to maintain the food moisture and freshness.

● Plastic film capable of blocking ultraviolet and infrared rays <br> Japanese chemical company uses polypropylene, polyethylene, and polyester as main raw materials and adds six inorganic powders to produce a plastic film that can block ultraviolet and infrared rays . The use of this type of film for packaging and storage of rice can prevent the aging of the rice; lining it on the surface of the corrugated cardboard box that packages vegetables, fruits or flowers can prevent fruit and vegetables from rot and flowers from withering.

● Glass with Sterilization Function <br> A Japanese company has made a new type of glass that contains metallic copper ions and has functions of sterilization and mildew proofing. Food containers made of this glass can kill all E. coli and staphylococcus within 24 hours, and thus prevent food from becoming moldy and germ-free and spoil.

● Insulation moisturizing self-adhesive wrapping paper <br> A Japanese company produces a non-toxic, tough, one-time self-adhesive wrapper with insulating moisturizing properties. The wrapping paper consists of two layers. The outer layer is kraft paper, which can be used for writing or printing. The inner layer is a special foam material, which can prevent the smell and sap of the packaged food from leaking out. Packaging food with it not only extends the shelf life and shelf life, but also loses self-adhesion upon unpacking, so it also prevents unpacking.

●Controlling air-permeable packaging film <br> A chemical company in the United States has used polypropylene film to make a breathable packaging film. The packaging film can be printed as a label, heat-sealed in the vent hole of a rigid airtight container, and the exchange of oxygen and carbon dioxide can be controlled to maintain the best environment within the packaging container, thereby enabling fresh fruits, vegetables, etc. The storage period is 1-3 times longer.

● High-temperature and high-pressure plastics <br> Soft drink bottles and other thermoplastics have lower production costs, but they cannot withstand high temperatures or high pressures; thermosets are strong and pressure-resistant, but they are expensive. A U.S. company has manufactured a new type of plastic that combines the advantages of the above two types of plastics.
The new plastic can withstand high temperatures of 326°C and has a compressive capacity of up to 2,200 kilograms per square centimeter. In addition, it does not have to be processed with a solid block like a thermoplastic part, but it can be injection molded or extruded into a complex shape that costs only half as much as thermoplastics. It has a wide range of uses.

● American hobby for food packaging color
Americans have a special interest in the color of food packaging, so even the same food in the US market tends to have different sales due to the color of the packaging. Various food packaging has formed a fixed representative color, such as: egg packaging is white; fruit is pure yellow or orange; coffee, cocoa, tomato juice, soup is red; beans and fresh vegetables are green. However, black-colored foods should never be wrapped in black, but instead should be brown or yellow. In addition, the color of the package should be concise, bright, not too much miscellaneous.

● New packaging materials made of corn. The Food Research Institute of the Ministry of Agriculture, Forestry and Fisheries of Japan has developed a water-resistant protein film suitable for covering expanded starch. It is made from corn and its strength is comparable to that of synthetic membranes used for general food packaging. It is biodegradable and does not pollute the environment.