Ọtụtụ ndị ahịa site na weebụsaịtị anyị na-enye ndụmọdụ na ekwentị gbasara ewu ewu nke ụdị akpa kpara, wee taa DongLai akpa kpara Xiaobian iji kọwaa ewu ewu nke ụdị akpa kpara.
Ụdị akpa a kpara akpa
A na-akpọkwa akpa a kpara akpa akpa agwọ. Ọ bụ ụdị plastik, nke a na-ejikarị eme ihe maka nkwakọ ngwaahịa. Ihe e ji eme ya bụkarị polyethylene, polypropylene na ihe ndị ọzọ e ji eme plastik kemịkalụ. Lee obere okwu gbasara ụdị akpa a kpara akpa na ojiji ya.
Polyethylene bụ isi ihe e ji emepụta ihe n'èzí mba ọzọ, polypropylene bụ isi ihe e ji emepụta ihe n'ụlọ. Ọ bụ resin thermoplastic nke e ji polymerization nke ethylene mee. N'ime ụlọ ọrụ mmepụta ihe, ọ gụnyekwara copolymers nke ethylene nwere obere α-olefin. Polyethylene enweghị isi, ọ naghị egbu egbu, ọ na-eme ka wax dị ka ihe na-esi ísì, ọ na-enwe mmetụta dị ala na okpomọkụ (okpomọkụ kacha nta ruo -70 ~ -100 ℃), ezigbo nkwụsi ike kemịkalụ, ọtụtụ nguzogide nchara acid na alkali (nguzogide acid, oxidation), anaghị agbaze na ihe mgbaze n'ozuzu na okpomọkụ ụlọ, obere mmiri na-amịkọrọ, arụmọrụ mkpuchi eletriki dị mma; Agbanyeghị, polyethylene na-enwe mmetụta dị ukwuu na nrụgide gburugburu ebe obibi (mmetụta kemịkalụ na igwe) ma nwee ike iguzogide ịka nká okpomọkụ. Njirimara nke polyethylene dị iche iche site na ụdị dị iche iche ruo na ụdị, dabere na nhazi molekul na njupụta. Ụzọ mmepụta dị iche iche nwere ike inye njupụta dị iche iche (0.91-0.96g/cm3). Enwere ike ịhazi polyethylene n'otu ụzọ ahụ e si akpụ plastik thermoplastic nkịtị (lee nhazi plastik). A na-eji ya eme ihe n'ọtụtụ ebe n'imepụta ihe nkiri, akpa, ọkpọkọ mmiri, waya otu, waya na eriri, ihe ndị dị mkpa kwa ụbọchị, wdg. Enwere ike iji ya dị ka ihe mkpuchi ugboro ugboro maka TV, radar, wdg. Site na mmepe nke ụlọ ọrụ petrochemical, mmepụta polyethylene etolitela ngwa ngwa, na-aza ihe dị ka 1/4 nke mmepụta plastik niile. Na 1983, ikike mmepụta zuru ụwa ọnụ nke polyethylene bụ tọn metric 24.65, ụlọ ọrụ a na-ewukwa nwere ikike nke tọn metric 3.16.
Polypropylene (PP)
Resin thermoplastic nke e ji polymerization nke propylene mee. E nwere ụdị nhazi atọ, ya bụ, isotopic zuru oke, atactic na indirect. Ngwaahịa ụlọ ọrụ mmepụta ihe mejupụtara ya bụ isi ihe owuwu isotopic. Polypropylene gụnyekwara copolymer nke propylene na obere ethylene. Ọ na-abụkarị ihe na-agbanwe agbanwe, nke siri ike na-enweghị agba, nke na-enweghị isi na nke na-adịghị egbu egbu. N'ihi iwu nhazi ya, nnukwu kristal, ebe agbaze ruo 167 ℃, iguzogide okpomọkụ. Site na njupụta nke 0.90g/cm3, ọ bụ plastik kachasị mfe. Nguzogide nrụrụ aka, ike nrụgide 30MPa, ike, nkwụsi ike na nghọta ka mma karịa polyethylene. Ihe na-adịghị mma bụ na obere iguzogide mmetụta okpomọkụ adịghị mma, ọ dị mfe ịka nká, mana enwere ike ịgbanwe ya ma tinye antioxidant iji merie.
Agba akpa a kpara akpa bụ ọcha ma ọ bụ ọcha n'ozuzu ya, ọ naghị egbu egbu ma ọ bụ enweghị ụtọ, ihe ọjọọ ọ na-eme ahụ mmadụ na-adịkarị obere. Ọ bụ ezie na e ji plastik kemịkalụ dị iche iche mee ya, mana ọ na-echebe gburugburu ebe obibi nke ọma, ike imegharị ihe;
A na-eji akpa e ji akpa kpaa eme ihe nke ukwuu, a na-ejikarị ya eme ihe n'ịkwakọ ngwaahịa dị iche iche, a na-ejikwa ya eme ihe n'ọtụtụ ụlọ ọrụ;
Akpa plastik e ji polypropylene resin kpaa, nke a na-etinye n'ime eriri dị larịị, wee kpaa ya n'ime akpa.
Akpa plastik ejiri plastik mee nke e ji ákwà plastik mee dị ka ihe ndabere, site na ịkpụzi ihe na-asọ asọ.
A na-eji ya eme ihe maka ịkwakọba ntụ ntụ ma ọ bụ ihe siri ike na ihe ndị na-agbanwe agbanwe. A na-ekewa akpa plastik e ji ihe mejupụtara abụọ n'ime otu akpa na atọ n'ime otu akpa dịka ihe mejupụtara ihe ahụ si dị.
Dịka usoro ịkwa akwa si dị, enwere ike kewaa ya n'ime akpa ịkwa akwa ala, akpa ịkwa akwa ala akụkụ, akpa itinye akpa na akpa ịkwa akwa nke gluu kpuchiri.
Dabere n'obosara nke akpa ahụ, enwere ike kewaa ya n'ime 450, 500, 550, 600, 650 na 700 mm. Ndị abụọ ahụ ga-ekwenye na nkọwapụta pụrụ iche.
N'elu bụ ewu ewu nke obere ihe mkpuchi maka ụdị niile nke imecha nke ndụmọdụ akpa kpara akpa, site na ịkekọrịta ọdịnaya, ruo na mgbasa ozi nke ụdị akpa kpara akpa nwere ụfọdụ nghọta, ọ bụrụ na ịchọrọ ịbanye n'ime akpa ozi ahịa, nwee ike ịkpọtụrụ onye na-ere ahịa na ụlọ ọrụ anyị, ma ọ bụ na nyocha nke ọwụwa anyanwụ na akpa kpara akpa ozugbo, a na-atụle nkwurịta okwu n'akwụkwọ a.
Oge ozi: Jenụwarị-15-2021