Abubuwan da ke cikin jiki da manyan ayyuka na kayan aikin sarrafa PVC

Taimakon sarrafa PVC shine polymer graft na thermoplastic da aka samu daga polymerization na methyl methacrylate da acrylate ta hanyar ruwan ruwan iri. An fi amfani dashi don sarrafawa da samar da kayan PVC. Yana da tasiri mai kyau akan inganta tasirin tasirin kayan aikin PVC. Yana iya shirya hanyar polymerization mai matakai da yawa ta amfani da polymerization na iri, gami da polymerization na gargajiya na gargajiya da core harsashi ruwan shafa. Its amfani ya ta'allaka ne a cikin ikon sarrafa abun da ke ciki, size, harsashi kauri, rabo daga harsashi zuwa core radius, surface aiki halaye, da dai sauransu na barbashi bisa ga daban-daban bukatun a lokacin kira dauki tsari, da kuma sakamakon barbashi size rarraba ne in mun gwada da uniform. .

Babban kayan albarkatun don kayan aikin sarrafa PVC sune acrylic esters da methyl methacrylate. A cikin ainihin samarwa, acrylate yawanci ana yin shi ne da farko tare da wasu monomers (kamar styrene, acrylonitrile, da dai sauransu) ta hanyar ruwan shafa fuska don samar da polymer tare da ƙananan zafin canjin gilashi, wato, cibiya tare da kaddarorin elastomer, sa'an nan kuma graft copolymerized tare da methyl methacrylate. , styrene, da dai sauransu don samar da polymer tare da tsarin harsashi mai mahimmanci. Babban abun ciki na wannan ruwan shafa mai polymerized gabaɗaya shine kusan 45% ± 3%, kuma ruwan shafa ya bushe kuma ya bushe don sanya abun cikin ruwa na samfurin ƙasa da 1% (jari mai yawa) don samun samfuran foda.

Core harsashi ruwan shafa mai polymerization shine ainihin fasahar samar da guduro ta ACR. Tsarin harsashi na ACR ana iya raba shi zuwa nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau`in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau’in nau’in nau’in nau’in harsashi na iya kasu kashi uku: Tsarin harsashi mai taushi mai wuyar gaske, tsarin harsashi mai taushi mai taushi, da tsari mai laushi mai wuya mai wuya uku. Koyaya, babban nau'in da ake siyarwa a halin yanzu akan kasuwa shine "tsarin harsashi mai laushi mai laushi". ACR resins tare da wannan tsarin suna da kyakkyawan aiki kuma ana amfani da su sosai. Matsakaicin ruwan shafan ruwan shafa mai laushi na “tsarin sigar harsashi mai laushi mai laushi” wani tsari ne wanda ake dasa monomer mai wuya akan nau'in barbashi na latex mai laushi wanda aka kafa ta matakin farko na polymerization na ruwan shafa. Nau'in da sashi na emulsifiers, core-harsashi rabo, harsashi monomer ciyar hanya, crosslinking digiri na iri latex barbashi (rubber core), iri barbashi size, da kuma irin da sashi na crosslinking wakili duk suna da gagarumin tasiri a kan core-harsashi tsarin. na ACR latex barbashi da aikin ƙarshe na samfurin ACR.