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2021
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What are the differences between PC, PP, PVC, PE, PET, and PMMA
01
PC
PC (polycarbonate) has good transparency and average thermal stability, but its disadvantage is poor hand feel, especially when used for a period of time, it looks "dirty" from the outside. It also belongs to engineering plastics, such as organic glass, such as polymethyl methacrylate, polycarbonate, etc.
PC is a widely used material, such as phone cases, laptops, etc. It is particularly used in the manufacturing of baby bottles, space cups, etc. In recent years, milk bottles have been controversial due to their presence of bisphenol A. The residual bisphenol A in PC releases more and faster at higher temperatures. Therefore, PC water bottles should not be used to hold hot water.
02
PP
PP plastic is isotactic crystalline and has good thermal stability, but it is brittle and prone to breakage, mainly made of polypropylene material. The microwave lunch box is made of this material, which is resistant to high temperatures of 130 ℃ and has poor transparency. It is the only plastic box that can be put into the microwave and can be reused after careful cleaning.
It should be noted that some microwave lunch boxes are made of PP 05, but the box cover is made of PS 06 (polystyrene). The transparency of PS is average, but it is not heat-resistant, so it cannot be put into the microwave together with the box body. For safety reasons, remove the lid of the container before placing it in the microwave.
03
PVC
PVC, also known as PVC, is a type of polyvinyl chloride resin that is often used to make engineering profiles and daily plastic products. It is commonly used in raincoats, building materials, plastic films, plastic boxes, etc. Excellent plasticity and low price. But it can only withstand high temperatures of 81 ℃.
The toxic and harmful substances easily generated by plastic products made of this material come from two aspects: one is the single molecule vinyl chloride that has not been fully polymerized during the production process, and the other is the harmful substances in plasticizers. These two substances are prone to release when exposed to high temperatures and oils, and toxic substances can easily cause cancer when they enter the human body with food. At present, containers made of this material are relatively rare for packaging food. Also, do not let it get heated.
04
PE
PE refers to polyethylene. Freshness film, plastic film, etc. are all made of this material. The heat resistance is not strong, and usually qualified PE preservation films will experience hot melting when the temperature exceeds 110 ℃, leaving behind some plastic preparations that cannot be decomposed by the human body.
Moreover, wrapping food in cling film and heating it can easily dissolve harmful substances from the oil in the food. Therefore, when food is put into the microwave, the wrapped plastic wrap must be removed first.
05
PET
PET, also known as polyethylene terephthalate, is used in mineral water bottles and carbonated beverage bottles. Beverage bottles cannot be recycled to hold hot water. This material is heat-resistant to 70 ℃ and is only suitable for holding warm or frozen drinks. Holding high-temperature liquids or heating them can easily deform and dissolve harmful substances that are harmful to the human body.
06
PMMA
PMMA, also known as polymethyl methacrylate, also known as acrylic, acrylic, or organic glass, is commonly referred to as acrylic in Taiwan and acrylic adhesive in Hong Kong. It has the advantages of high transparency, low price, and easy mechanical processing, making it a commonly used substitute material for glass. But its heat resistance is not high and non-toxic. Widely applied in the advertising logo production industry.
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