(1) CPE
Chlorinated polyethylene (CPE) ndi ufa wochokera ku chlorination ya HDPE yomwe imapachikidwa m'madzi. Pamene chlorination imawonjezeka, HDPE yoyambirira ya crystalline pang'onopang'ono imakhala amorphous elastomer. CPE yomwe imagwiritsidwa ntchito ngati chogwirizira cholimba nthawi zambiri imakhala ndi chlorine ya 25-45%. CPE ili ndi magwero osiyanasiyana komanso mitengo yotsika. Kuphatikiza pa mphamvu yake yolimba, imakhalanso ndi kukana kuzizira, kukana nyengo, kukana malawi, komanso kukana mankhwala. Pakadali pano, CPE ndiye chosinthira mphamvu chachikulu ku China, makamaka popanga mapaipi ndi ma profiles a PVC, ndipo mafakitale ambiri amagwiritsa ntchito CPE. Kuchuluka kowonjezera nthawi zambiri kumakhala magawo 5-15. CPE ingagwiritsidwe ntchito limodzi ndi zinthu zina zogwirizira, monga rabara ndi EVA, kuti ikwaniritse zotsatira zabwino, koma zowonjezera za rabara sizimalimbana ndi ukalamba.
(2) ACR
ACR ndi copolymer ya ma monomers monga methyl methacrylate ndi acrylic ester. Ndiwo modifier wabwino kwambiri wopangidwa m'zaka zaposachedwa ndipo amatha kuwonjezera mphamvu ya zinthu nthawi zambiri. ACR ndi ya modifier ya impact ya kapangidwe ka core-shell, yokhala ndi chipolopolo chopangidwa ndi methyl methacrylate ethyl acrylate polymer, ndi rabara elastomer yopangidwa ndi crosslinking ndi butyl acrylate ngati gawo la core chain lomwe limagawidwa mkati mwa tinthu tating'onoting'ono. Yoyenera kwambiri kusintha zinthu za pulasitiki za PVC kuti zigwiritsidwe ntchito panja, kugwiritsa ntchito ACR ngati modifier ya impact mu PVC pulasitiki profiles ili ndi makhalidwe abwino opangira, malo osalala, kukana kukalamba bwino, komanso mphamvu yayikulu ya ngodya poyerekeza ndi zina zosinthira, koma mtengo wake ndi wokwera pafupifupi gawo limodzi mwa magawo atatu kuposa CPE.
(3) MBS
MBS ndi copolymer ya ma monomers atatu: methyl methacrylate, butadiene, ndi styrene. Gawo la kusungunuka kwa MBS lili pakati pa 94 ndi 9.5, lomwe lili pafupi ndi gawo la kusungunuka kwa PVC. Chifukwa chake, limagwirizana bwino ndi PVC. Chinthu chake chachikulu ndichakuti mutawonjezera PVC, imatha kupangidwa kukhala chinthu chowonekera. Nthawi zambiri, kuwonjezera magawo 10-17 ku PVC kumatha kuwonjezera mphamvu yake yokhudza ndi nthawi 6-15. Komabe, kuchuluka kwa MBS komwe kwawonjezeredwa kupitirira magawo 30, mphamvu ya PVC imachepa. MBS yokha imakhala ndi magwiridwe antchito abwino, mawonekedwe abwino, komanso kutumiza kwa oposa 90%. Ngakhale ikukweza magwiridwe antchito, imakhala ndi zotsatira zochepa pa zinthu zina za resin, monga mphamvu yolimba komanso kutalika panthawi yopuma. MBS ndi yokwera mtengo ndipo nthawi zambiri imagwiritsidwa ntchito limodzi ndi zinthu zina zosinthira mphamvu monga EAV, CPE, SBS, ndi zina zotero. MBS ili ndi kukana kutentha komanso kukana nyengo, zomwe zimapangitsa kuti isagwiritsidwe ntchito panja kwa nthawi yayitali. Kawirikawiri sichigwiritsidwa ntchito ngati chosinthira mphamvu popanga ma profiles a pulasitiki a zitseko ndi mawindo.
(4) SBS
SBS ndi copolymer ya ternary block ya styrene, butadiene, ndi styrene, yomwe imadziwikanso kuti thermoplastic styrene butadiene rabara. Ili m'gulu la thermoplastic elastomers ndipo kapangidwe kake kakhoza kugawidwa m'mitundu iwiri: yooneka ngati nyenyezi ndi yolunjika. Chiŵerengero cha styrene ndi butadiene mu SBS makamaka ndi 30/70, 40/60, 28/72, ndi 48/52. Imagwiritsidwa ntchito makamaka ngati chosinthira mphamvu ya HDPE, PP, ndi PS, yokhala ndi mlingo wa magawo 5-15. Ntchito yayikulu ya SBS ndikuwonjezera mphamvu yake yotsika kutentha. SBS ili ndi mphamvu yofooka ya nyengo ndipo siyoyenera kugwiritsidwa ntchito panja kwa nthawi yayitali.
(5) ABS
ABS ndi copolymer ya ternary ya styrene (40% -50%), butadiene (25% -30%), ndi acrylonitrile (25% -30%), yomwe imagwiritsidwa ntchito kwambiri ngati pulasitiki yaukadaulo komanso imagwiritsidwanso ntchito posintha PVC impact, yokhala ndi zotsatira zabwino zosintha kutentha kochepa. Pamene kuchuluka kwa ABS kowonjezeredwa kufika pazigawo 50, mphamvu ya PVC impact imatha kufanana ndi ya ABS yoyera. Kuchuluka kwa ABS kowonjezeredwa nthawi zambiri kumakhala magawo 5-20. ABS imakhala ndi kukana kwanyengo ndipo siyoyenera kugwiritsidwa ntchito panja kwa nthawi yayitali pazinthu. Nthawi zambiri sigwiritsidwa ntchito ngati chosinthira impact popanga ma profiles a pulasitiki ndi mawindo.
(6) Eva
EVA ndi copolymer ya ethylene ndi vinyl acetate, ndipo kuyambitsidwa kwa vinyl acetate kumasintha mtundu wa kristalo wa polyethylene. Kuchuluka kwa vinyl acetate kumasiyana kwambiri, ndipo index ya refractive ya EVA ndi PVC ndi yosiyana, zomwe zimapangitsa kuti zikhale zovuta kupeza zinthu zowonekera. Chifukwa chake, EVA nthawi zambiri imagwiritsidwa ntchito limodzi ndi ma resin ena olimbana ndi kugwedezeka. Kuchuluka kwa EVA komwe kumawonjezeredwa ndi magawo ochepera 10.
Nthawi yotumizira: Marichi-15-2024
