General Plastics Muaj tsib yam sib txawv ntawm cov yas, uas yog polyethylene, polypropylene, polyvinyl chloride, polystyrene thiab ABS. Lawv txhua tus yog cov thermoplastics.
Polyethylene (PE)
Polyethylene yog cov khoom lag luam zoo tshaj plaws hauv kev lag luam yas. Polyethylene yog cov iav uas tsis pom lossis tsis pom, lub teeb yuag hnyav ua cov yas, nrog rau qhov kub tsis kam tiv taus (yam tsawg kawg siv kub tuaj yeem ncav cuag -70 ~ -100 ℃), rwb thaiv tsev hluav taws xob, tshuaj lom neeg ruaj khov, kua qaub, alkali thiab ntsev tiv taus corrosion zoo ib yam li cov kua dej , tab sis tsis tsim nyog los so lossis so nrog muaj zog alkaline xab npum, vim nws tsis tiv tshav kub. Polyethylene yog tsim rau kev ua los ntawm kev txhaj tshuaj molding, tshuab moulding, extrusion molding thiab lwm txoj hauv kev. Raws li qhov sib txawv sib txawv, PE tuaj yeem faib ua: qis ntom polyethylene LDPE; siab ceev polyethylene HDPE; linear low density polyethylene LLDPE. Polyethylene feem ntau yog siv los ua cov hnab ntim khoom noj thiab ntau yam ntim.
Polypropylene (PP)
Polypropylene yog thermoplastic tau los ntawm polymerization ntawm propylene. Feem ntau nws tsis muaj xim, tsis ntxhiab, tsis muaj ntxhiab thiab tsis muaj kuab lom, nrog qhov ntom ntom ntawm 0.90 ~ 0.919 g/cm. Nws yog lub teeb pom kev dav dav tshaj plaws yas. Nws qhov txiaj ntsig zoo tshaj yog tias nws muaj kev tiv thaiv dej. Cov yam ntxwv ntawm kev ua noj, tuaj yeem raus dej hauv dej kub ntawm 100 ℃, tsis muaj kev hloov pauv, tsis muaj kev puas tsuaj, tiv taus xeb, cov kua qaub thiab alkali organic kuab tshuaj yuav luag tsis muaj kev cuam tshuam rau nws, lub zog, nruj thiab pob tshab zoo dua li polyethylene, qhov tsis zoo yog kev tiv thaiv Tsawg-kub cuam tshuam tsis zoo thiab yooj yim rau lub hnub nyoog, tab sis nws tuaj yeem txhim kho los ntawm kev hloov kho thiab ntxiv cov tshuaj ntxiv. Muaj peb txoj hauv kev los tsim cov tshuaj polypropylene: cov txheej txheem slurry, cov theem ua kua ntau thiab cov txheej txheem roj. Polypropylene feem ntau yog siv rau cov tais diav zaub mov.
Polyvinyl Chloride (PVC)
Polyvinyl chloride yog yas ua los ntawm polymerization ntawm vinyl chloride. Nws muaj xim zoo nkauj, tiv taus xeb, ua haujlwm ntev, thiab nws cov tawv tawv tuaj yeem hloov pauv tau los ntawm kev ntxiv cov yas yas. Cov txheej txheem tsim khoom ntawm polyvinyl chloride suav nrog kev tshem tawm polymerization, emulsion polymerization thiab ntau polymerization, nrog kev ncua polymerization yog txoj hauv kev tseem ceeb. Vim tias ntxiv qee cov khoom siv tshuaj lom xws li cov yas yas thiab cov tshuaj tiv thaiv kev laus hauv cov txheej txheem tsim khoom, cov khoom feem ntau tsis khaws cov zaub mov thiab tshuaj.
Polystyrene (PS)
Lub hom phiaj dav dav polystyrene yog cov polymer ntawm styrene, uas yooj yim rau xim thiab muaj qhov pom zoo, tab sis muaj qhov tsis zoo ntawm kev ua nkig. Yog li, los ntawm kev ntxiv polybutadiene, nws tuaj yeem ua rau cuam tshuam tiv taus polystyrene (HTPS). Nws tiv taus acid thiab alkali corrosion, tab sis yooj yim soluble hauv cov kuab tshuaj organic xws li chloroform, dichloroethylene thiab txiv tsawb dej. Cov txheej txheem tsim khoom tseem ceeb ntawm polystyrene yog cov polymerization ntau, tshem tawm polymerization thiab daws cov polymerization. Polystyrene feem ntau yog siv los ua teeb txawb, txhuam txhuam hniav, cov khoom ua si, thiab cov khoom siv hluav taws xob.
ABS
ABS cob yog cov khoom lag luam ntawm co-polymerization ntawm acrylonitrile-butadiene-styrene peb monomers, hu ua ABS terpolymer. Cov yas no muaj cov khoom sib txawv heev vim qhov sib txawv sib txawv ntawm nws cov khoom A (acrylonitrile), B (butadiene) thiab S (styrene) hauv kev sib xyaw thiab qhov sib txawv hauv kev tsim khoom. ABS yog qhov tsim nyog rau kev txhaj tshuaj molding thiab kev ua extrusion, yog li nws siv feem ntau los tsim ob hom khoom no. Cov xim ntawm ABS cob yog qhov muag pom, tiv tshav kub, muaj zog, thiab sab nrauv tuaj yeem plated nrog cov yeeb yaj kiab hlau xws li chrome thiab npib tsib xee. Nws tuaj yeem siv los ua cov yuam sij piano, cov nyees khawm, tuav riam, TV casings, tuav lub kaus, thiab lwm yam.
