Mmepụta mba ofesi bụ polyethylene (PE), mmepụta ime obodo bụ polypropylene (PP), bụ ụdị resin thermoplastic nke ethylene polymerization mepụtara. N'ụlọ ọrụ mmepụta ihe, ọ gụnyekwara copolymers nke ethylene nwere obere -olefin. Polyethylene enweghị isi, ọ naghị egbu egbu, ọ dị ka wax, nwere ezigbo iguzogide okpomọkụ dị ala (okpomọkụ ojiji kacha ala nwere ike ịdị ruo -70 ~ -100℃), ezigbo nkwụsi ike kemịkalụ, nwere ike iguzogide ọtụtụ mbuze acid na alkali (enweghị oxidation nke acid), okpomọkụ ụlọ anaghị agbaze na ihe mgbaze izugbe, obere nnabata mmiri, arụmọrụ mkpuchi eletriki dị mma; Mana polyethylene na-enwe mmetụta maka nrụgide gburugburu ebe obibi (mmetụta kemịkalụ na igwe) ma nwee ike iguzogide ịka nká okpomọkụ. Njirimara nke polyethylene dị iche iche site na ụdị ruo ụdị, ọkachasị dabere na nhazi molekul na njupụta. Enwere ike nweta ngwaahịa nwere njupụta dị iche iche (0.91 ~ 0.96g/cm3) site na iji ụzọ mmepụta dị iche iche. Enwere ike ịhazi polyethylene site na usoro ịkpụzi thermoplastic izugbe (lee nhazi plastik). A na-eji ya eme ihe n'ọtụtụ ebe n'ịmepụta ihe nkiri, akpa, paịpụ, waya otu, waya na eriri, ihe ndị dị mkpa kwa ụbọchị, wdg, a pụkwara iji ya mee ihe dị ka ihe mkpuchi ugboro ugboro maka TV, radar, wdg. Site na mmepe nke ụlọ ọrụ petrochemical, mmepụta polyethylene amalitela ngwa ngwa, ihe dị ka 1/4 nke mmepụta plastik niile. Na 1983, ikike mmepụta polyethylene zuru oke bụ 24.65Mt, ikike nke ụlọ ọrụ a na-ewu bụ 3.16Mt.
Polypropylene (PP)
Resin thermoplastic nke e ji polymerization nke propylene kwadebe. E nwere nhazi atọ nke ngwaahịa isochronous, nke a na-achịkwaghị achịkwa na nke dị n'etiti oge, ngwaahịa isochronous bụkwa ihe ndị bụ isi nke ngwaahịa ụlọ ọrụ mmepụta ihe. Polypropylene gụnyekwara copolymers nke propylene na obere ethylene. Ọ na-abụkarị ihe na-enweghị agba siri ike, enweghị isi na-adịghị egbu egbu. N'ihi na nhazi ahụ dị ọcha ma nwee nnukwu kristal, yabụ ebe agbaze ruo 167℃, ike iguzogide okpomọkụ, enwere ike iji ngwaahịa uzuoku dị ka uru ya pụrụ iche. Site na njupụta nke 0.90g/cm3, ọ bụ plastik kachasị mfe zuru ụwa ọnụ. Nguzogide corrosion, ike nrụgide 30MPa, ike, nkwụsi ike na nghọta dị mma karịa polyethylene. Ihe na-adịghị mma bụ obere mmetụta okpomọkụ na ịka nká dị mfe, nke enwere ike imeri site na mgbanwe na itinye antioxidant n'otu n'otu.
Agba akpa a kpara akpa na-acha ọcha ma ọ bụ isi awọ, ọ naghị egbu egbu ma ọ bụ enweghị ụtọ, ọ naghị emerụ ahụ mmadụ ahụ nke ọma, ọ bụ ezie na e ji ọtụtụ plastik kemịkalụ mee ya, mana nchekwa gburugburu ebe obibi ya siri ike karị, ike imegharị ya ka ukwuu;
A na-ejikarị akpa e ji akpa kpaa eme ihe nke ukwuu, a na-ejikarị ya eme ihe maka ịkwakọ na ịkwakọ ihe dị iche iche, nke a na-ejikarị eme ihe n'ụlọ ọrụ mmepụta ihe;
A na-eji polypropylene resin mee akpa plastik a kpara akpa dị ka ihe e ji eme ihe, nke a na-ewepụta ma gbasaa ka ọ bụrụ silk dị larịị, wee kpaa ya ma mee akpa.
Akpa plastik a kpara nke ọma dabere na ákwà plastik a kpara nke ọma, nke a na-eji usoro mpịakọta eme.
A na-eji usoro ngwaahịa a eme ihe maka ịkwakọba ntụ ntụ ma ọ bụ ihe siri ike na ihe ndị na-agbanwe agbanwe. A na-ekewa akpa plastik a kpara akpa n'ime akpa abụọ n'ime otu na akpa atọ n'ime otu dịka ihe mejupụtara ya si dị.
Dịka usoro ịkwa akwa si dị, enwere ike kewaa ya ụzọ abụọ: akpa ịkwa akwa ala, akpa ịkwa akwa ala, itinye akpa na akpa ịkwa akwa njikọ.
Dịka obosara akpa ahụ si dị irè, enwere ike kewaa ya ụzọ 350, 450, 500, 550, 600, 650 na 700mm. Ndị abụọ ahụ ga-ekwenye na nkọwapụta pụrụ iche.
Oge ozi: Sep-28-2020