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【Concept 】 Traditional concept refers to all the clay and other inorganic non-metallic mineral raw materials for artificial industrial products. ============================ 【Press the components classification terms】 ----------------- 1 [ 1 : Polyethylene (PET)] Polyethylene terephthalate Collection is made from ethylene . Commonly used for mineral water bottles, Coke bottles , juice bottles. It can only be due to heat 70 ℃, it is only suitable for hot and cold beverages , hot liquids or heating if fitted is deformed, there are harmful substances leaching . Using 10 months later, may release carcinogenic DEHP; sun is not placed on the car , you can not install wine, oil substances. This identifies the bottle after use can not continue to hold water , please throw in recyclable trash , let it be recycled. ----------------- 2 [ No. 2 : High density polyethylene (HDPE)] Suitable for food and medicine bottles mounted , mounted cleaning supplies and bath products , shopping bags, trash. Common for the cleaning supplies, shower products packaging bottles. Not used for food packaging ----------------- 3 [ No. 3 : Polyvinyl chloride (PVC)] Formed by the polymerization of vinyl chloride High temperatures and in contact with the oil PVC easy to open and release phthalates toxic incompletely polymerized vinyl chloride monomer . Made of PVC cling film with good transparency, easy to break, strong adhesion , low prices, we are supermarkets, hypermarkets stick on the box to see the film is that it is very fast . According to its characteristics , it only applies to vegetables, fruits, cold storage preservation, should not put meat , cakes and other foods contain more fat , and it is not used as a microwave oven . This material is likely to have harmful substances at high temperatures generated , even the manufacturing process it will release toxic substances into the body with food , may cause birth defects and other diseases. Containers of this material has been rarely used in food packaging. If you are using , do not let it heat . ----------------- 4 [4 Number: low density polyethylene (LDPE)] Plastic film and plastic wrap, good barrier properties to water , so the milk cartons made ??of paper , beverage cartons and other packaging boxes are using it as an inner foil. Due to low density polyethylene plastic wrap超过110 ℃ will appear blanched , so if the use of the plastic wrap food heating , food grease will wrap some of the ingredients melt out , therefore , into the microwave oven is required before the first fresh film is removed , at least not in direct contact with foods or plastic wrap . LDPE itself does not have degradation , today's "plastic limit order" is its major limitation . ----------------- 5 [ the 5th : Polypropylene (PP)] By the polymerization of propylene The transparency of polyethylene , better than polyethylene hard , restaurant packed with boxes mostly it made ??of plastic boxes can be put into the microwave . Temperature, more common in microwave meal . Can be reused after careful cleaning . Require special attention and some microwave food containers, box 5, PP indeed manufacture, but the lid is 1st PE , because PE can not withstand high temperatures, it can not be put in the microwave with the box body . For insurance purposes , the container in a microwave oven before , first remove the lid . ----------------- 6 [ 6 : Polystyrene (PS)] Polymerization of styrene Often used as a box of instant noodles in bowl , snack . It is resistant to heat and cold , but the temperature is too high will release harmful substances , so do not put into the microwave bowl of instant noodles , and try not to use it to install the hot food, but also can not bloom strongly acidic ( if juice ) and strong alkaline substances , otherwise it will release styrene and auxiliary materials . Prevalent in the bowl of instant noodles box , snack . And heat and cold, but you can not put in the microwave , so as to avoid high temperature and release of chemicals. And can not be used to contain acid ( such as orange juice ) , strong alkaline substances , because the body will break down right bad polystyrene, are carcinogenic . Therefore, you should try to avoid packaged snack foods hot . ----------------- 7 [ 7 : Polycarbonate (PC)] It is used bisphenol A and diphenyl carbonate was synthesized , with excellent toughness and mechanical strength, and good transparency , it is known as " transparent metal ." Commonly used in the manufacture of bottles, cups , bottles and so on. PC in the production process, the raw materials should become completely plastic bisphenol A structural component shall not in use, release , but in fact often do , there will be a small part of the bisphenol A was not able to completely converted to plastics , when heated, will was released into the food. Bisphenol A is an endocrine disruptor , on the developing fetus and children particularly harmful and may cause miscarriage , congenital mental retardation and slow mental development of infants . Therefore, caution should be used , including baby bottles made ??of polycarbonate , so as not to harm the baby's development . Prevalent in the kettle , cups , bottles . High temperature, can be used repeatedly , but could not put into the microwave . ============================ 【Accessories term 】 ----------------- 1 [ filler ] The role of the filler is to improve the strength and heat resistance of plastics and reduce costs . Commonly used are silica, talc and so on. ----------------- 2 [ Plasticizer ] A plasticizer to increase plasticity , commonly used phthalate esters, glyceryl stearate , etc., and some of additives containing heavy metals , which is an environmental phthalate endocrine disruptors , with hormone-like effects , affect the endocrine system and the reproductive system functions abroad was the mid -1990s began to limit or ban its use in food packaging , in 2005 the EU also prohibits children's toys and children's products in use . ----------------- 3 [ Stabilizer ] Stabilizers to prevent the action of the synthetic resin is light and heat decomposition , destruction, commonly used stearate , methyl mercaptan and tin . Stearic acid salts of lead or grease will come out to thaw food . ----------------- 4 [ coloring ] Colorants having various colors of plastic , including organic dyes and inorganic dyes. ----------------- 5 [ lubricant ] Lubricants for plastic forming process to prevent stick mold , and to the plastic surface is smooth and beautiful , stearic acid is used , and paraffin . ============================ 【Article is excerpted from: Web Search】 【Reserved Integrate / Just Reference】 【Translation is by The Network】 |
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