A na-emepụta polyethylene (PE) na mba ndị ọzọ, naPolypropyleneA na-emepụta (PP) na China.Ọ bụ ụdị resin thermoplastic mere site na polymerization nke ethylene.Na ụlọ ọrụ, a na-etinyekwa copolymer nke ethylene nwere obere α - olefins.Polyethylene enweghị isi, adịghị egbu egbu, waxy, nwere oke nguzogide okpomọkụ dị ala (okpomọkụ kacha ala nwere ike iru - 70 ~ 100 ℃), ezigbo nkwụsi ike nke kemịkalụ, na-eguzogide ọtụtụ acid na alkali ozize (anaghị eguzogide oxidizing acid), insoluble na n'ozuzu ihe mgbaze. na ọnụ ụlọ okpomọkụ, obere mmiri na-enweta mmiri na mkpuchi eletrik dị mma;ma polyethylene na-enwe mmetụta nke ukwuu na nrụgide gburugburu ebe obibi (chemical na mechanical action) The okpomọkụ na-eguzogide ịka nká adịghị mma.Ngwongwo nke polyethylene dịgasị iche iche na ụdị dị iche iche, tumadi dabere n'ụdị molekul na njupụta.Enwere ike nweta njupụta dị iche iche (0.91-0.96 g / cm3) nke ngwaahịa site na ụzọ mmepụta dị iche iche.
Enwere ike ịhazi polyethylene site na usoro ịkpụzi nke thermoplastic izugbe (lee nhazi plastik).Ọ na-ọtụtụ-eji na-eme fim, containers, ọkpọkọ, monofilaments, wires na cables, kwa ụbọchị mkpa, wdg nwekwara ike-eji dị ka elu-ugboro insulating ihe maka TV, radar, wdg Na mmepe nke petrochemical ụlọ ọrụ, mmepụta ihe. nke polyethylene etolitela ngwa ngwa, na mmepụta ihe na-akpata ihe dịka 1/4 nke mkpokọta plastik.Na 1983, ngụkọta ike mmepụta nke polyethylene n'ụwa bụ 24.65 MT, na ikike nke osisi a na-ewu bụ 3.16 Mt.
Polypropylene(PP)
Resin thermoplastic enwetara site na polymerization nke propylene.Enwere nhazi atọ nke ihe isotactic, ihe na-adịghị ahụkebe na ihe syndiotactic.Ihe isotactic bụ akụkụ bụ isi nke ngwaahịa ụlọ ọrụ.Polypropylenetinyekwara copolymers nke propylene nwere obere ethylene.Ọtụtụ mgbe translucent enweghị agba siri ike, isi adịghị egbu egbu.N'ihi nhazi ya mgbe niile na nnukwu crystallization, ebe mgbaze dị elu dị ka 167 ℃, na ngwaahịa nwere ike igba ogwu site na uzuoku.Njupụta ahụ bụ 0.90g/cm3, nke bụ rọba n'ozuzu kachasị mfe.Nguzogide corrosion, ike mgbaka 30MPa, ike, siri ike na nghọta dị mma karịa polyethylene.Ọdịmma ndị ahụ bụ nguzogide mmetụta okpomọkụ dị ala na ịdị mfe ịka nká, nke enwere ike imeri site na mgbanwe na ịgbakwunye antioxidant n'otu n'otu.
Agba nkeakpa akpana-acha ọcha ma ọ bụ isi awọ n'ozuzu, adịghị egbu egbu na enweghị ụtọ, na n'ozuzu ọ dịghị emerụ ahụ mmadụ.Ọ bụ ezie na e ji plastik kemịkal dị iche iche mee ya, nchebe gburugburu ebe obibi siri ike, ike imegharị ya dịkwa ukwuu;
Akpa kpara akpaA na-eji s eme ihe n'ọtụtụ ebe, tumadi maka ịkwakọ na ịkwakọ ihe dị iche iche, na-ejikwa ya na ụlọ ọrụ;
Plasticakpa akpabụ nkePolypropyleneresin dị ka isi akụrụngwa, nke a na-agbapụta ma gbatịa n'ime filament dị larịị, wee kpaa ya ma mee ka ọ bụrụ akpa.
Plastic mejupụtaraakpa akpabụ akwa rọba kpara akpa site na nkedo teepu.
A na-eji usoro ngwaahịa a maka ịkwakọba ntụ ntụ ma ọ bụ ihe siri ike granular na isiokwu na-agbanwe agbanwe.Ihe mejupụtara plastikakpa akpana-ekewa abụọ n'ime otu akpa na atọ n'ime otu akpa dịka isi ihe mejupụtara.
Dịka usoro ịkwa akwa si dị, enwere ike kewaa ya n'ime akpa akwa akwa akwa, akpa n'ọnụ ọnụ, ntinye akpa na akpa akwa akwa akwa.
Dị ka obosara dị irè nke akpa ahụ si dị, enwere ike kewaa ya na 350, 450, 500, 550, 600, 650 na 700mm, onye na-eweta ya na onye na-achọ ya ga-ekwenye na nkọwapụta pụrụ iche.
Oge nzipu: Mee-10-2021