Vacuum-packed bags of rice, whole grains vacuum bag, vacuum nylon bags are generally, that one, two or more of the base film (heat sealing PE film, CPP, BOPP) and nylon (airtight better) or PET film special glue bonding through economic (chemical products) through complex machine composite film. And then the cut bags made of vacuum after sealing performance is the best. Air barrier performance, oxidation resistance, waterproof, moisture and strong mechanical properties, high blasting performance, strong anti-puncture tear resistance, high temperature (121 ℃), low temperature (-50 ℃). Non-toxic, tasteless line with national standards. Good heat sealing properties, good transparency. Physical Characteristics and Standards: Item Unit distinguishing index value of the reference standard tensile strength Mpa MD / TD 220 * 310 ASTM-D882 Elongation% MD / TD 125 * 72 ASTM-D882 30 minutes to be oxygen transmission rate cc / m day 20 ~ 40 ASTM-D3985 water vapor transmission rate g / m day 510 * 557 ASTM-B95 Note: due to different measurement and measurement by instrument, the data may be different, (measurement conditions: 23 ℃, 50% RH) TD: Portrait MD: lateral Products mainly applicable to all types of PC boards, IC integrated circuits, optical drives, hard drives, LCD monitors electronic components, various types of food vacuum packaging. Specifications: Size can be customized scope of products and industrial products industries in accordance with customer demand: welding materials, electronic products, circuit boards and other vacuum food packaging: rice, meat products, dried fish, aquatic products, sausages, roast duck, chicken, pork, frozen food, ham, bacon products, sausages, cooked meat, pickles, bean paste, spices and other excessive packaging, pollution may increase. Now the food, as long as it can be sent out as gifts, is bound in a complex with attractive packaging, generous layer after layer of packaging materials of various materials. This will not only directly affect the price of goods, there may be a serious harm to human health. For example, the use of PVC material made of moon cake tray to contain large amounts of toxic and hazardous substances. Moon cake contains more fat, these toxic and hazardous substances dissolved in the oil will be migrated to the moon cake, it will cause harm to human health.