Plastics can be divided into Engineering plastics
and sum together mix harmonious General plastic
, As the meaning of the literal, the general plastic is more common, and it can be seen everywhere in many places, and the industrial aspects of engineering plastics have excellent mechanical properties, which can withstand harsh mechanical stress. PA (polyamide), PC (polycarbonate)
, POM (polyoxy), PBT (polyethylene terephthalate), PPO (polyphenylene ether) These five materials have become five major engineering plastics, this article is a small preparation to everyone how to distinguish them. ,
PA (Polyamide): It is our commonly known nylon. In five major engineering plastics, its production and market is the biggest, the use is also the most wide, not only can be used to make plastics, but also a very good fiber Materials have an important role in the textile industry. Its prototype is transparent or milky white particles, the mechanical properties, high mechanical strength, good wear resistance, heat resistance, and electrical insulation, the disadvantage is that the water absorption is large.
: It is the fastest growing in recent years. It has a good anti-impact, anti-ultraviolet, radiation, heat resistance, and anti-aging performance, non-toxic and tasteless, can be used as a building sheet, medical device, product packaging, Electric tool housing, bracket, etc.
POM (poly formaldehyde): It is known as "Steel\\ POM It is white or light yellow, smooth, tensile strength of 70 MPa, small water absorption, tough, oil-resistant and oxide, but not resistant to strong acid, can make various type pulley parts.
PBT (polyethylene terephthalate): It is a milky white opaque or translucent thermal resin, low water absorption, can be used in humid environments, good insulation, acid base oil-resistant alcohol, However, non-hazage-resistant hydrocarbons, high thermal expansion, often use glass fiber reinforced filling modification, and use in industries such as automotive manufacturing, electronic appliances.
PPO (polyphenylene ether): It is the engineering plastic developed in the 1960s, the color is white, the electrical insulation and water resistance is especially highlighted, the strength, the dimension is stable, the thermal deformation temperature can reach 190 ° C, and the combustion can be extinguished . Although there are some shortcomings, it can be eliminated after modification, and the performance is good, and the price is also very high.