PVC는 어떤 재질인가요?
이른 화염비닐은 PVC, is a polymer made of vinyl chloride as a monomer through free radical polymerization. Because the electron-withdrawing substituent of the chlorine atom on vinyl chloride is p-π conjugated, has an electron-donating effect, and is not easily attacked by carbanions, so free radical polymerization can only be used. The current PVC polymerization process includes suspension polymerization (above 80%), bulk polymerization (about 7%), emulsion polymerization, microsuspension polymerization, etc.
PVC has good impact resistance, mechanical strength, dielectric properties and other aspects, so it has a wide range of applications and was once the world's largest output of general-purpose plastics. Common products include coatings, pipes, plastic steel, carpets, packaging materials, etc. There are two common preparation methods for PVC monomer vinyl chloride (VCM). One is the addition of acetylene and HCl to produce vinyl chloride. The raw material calcium carbide in this method comes from coal, and it requires a lot of electricity, which consumes a lot of money and costs a lot. high. (Some domestic factories still use this method.) Another method is the ethylene oxychlorination method, in which ethylene and chlorine generate 1,2-dichloroethylene and then crack to generate vinyl chloride. Because the main raw materials come from petroleum and alkali industry, low energy consumption and low cost, it is now gradually replacing the calcium carbide method.
염화비닐은 발암물질이며, 폴리염화비닐에는 잔류 염화비닐 단량체가 포함되어 있습니다. 따라서 폴리염화비닐은 일정한 발암성을 지니고 있으며, 2017년에 3급 발암물질로 지정되었습니다. (일반적인 3등급 발암물질로는 휘발유, 디젤, 나프탈렌 위생용 볼 등이 있습니다.) 현재 PVC 생산 공정은 PVC 내 잔류 단량체 함량을 매우 낮게 유지할 수 있었으며, 인증된 PVC는 식품 포장 및 기타 용도로 안전하게 사용할 수 있습니다.
PVC has good impact resistance, mechanical strength, dielectric properties and other aspects, so it has a wide range of applications and was once the world's largest output of general-purpose plastics. Common products include coatings, pipes, plastic steel, carpets, packaging materials, etc. There are two common preparation methods for PVC monomer vinyl chloride (VCM). One is the addition of acetylene and HCl to produce vinyl chloride. The raw material calcium carbide in this method comes from coal, and it requires a lot of electricity, which consumes a lot of money and costs a lot. high. (Some domestic factories still use this method.) Another method is the ethylene oxychlorination method, in which ethylene and chlorine generate 1,2-dichloroethylene and then crack to generate vinyl chloride. Because the main raw materials come from petroleum and alkali industry, low energy consumption and low cost, it is now gradually replacing the calcium carbide method.
염화비닐은 발암물질이며, 폴리염화비닐에는 잔류 염화비닐 단량체가 포함되어 있습니다. 따라서 폴리염화비닐은 일정한 발암성을 지니고 있으며, 2017년에 3급 발암물질로 지정되었습니다. (일반적인 3등급 발암물질로는 휘발유, 디젤, 나프탈렌 위생용 볼 등이 있습니다.) 현재 PVC 생산 공정은 PVC 내 잔류 단량체 함량을 매우 낮게 유지할 수 있었으며, 인증된 PVC는 식품 포장 및 기타 용도로 안전하게 사용할 수 있습니다.