[Ụdị akpa a kpara akpa]

Mmepụta nke mba ọzọ bụ polyethylene (PE), mmepụta nke ụlọ bụ isi polypropylene (PP), bụ ụdị resin thermoplastic nke ethylene polymerization mepụtara. N'ọrụ mmepụta ihe, ọ gụnyekwara copolymers nke ethylene nwere obere -olefin. Polyethylene odorless, na-adịghị egbu egbu, na-eche dị ka wax, nwere magburu onwe ala okpomọkụ na-eguzogide (kacha ala ojiji okpomọkụ nwere ike ruo -70 ~ -100 ℃), ezigbo chemical nkwụsi ike, nwere ike idi ọtụtụ nke acid na alkali ozize (enweghị oxidation nke acid), ụlọ okpomọkụ insoluble n'ozuzu solvents, obere mmiri absorption, magburu onwe eletriki mkpuchi ọrụ; Ma polyethylene na-enwe mmetụta maka nrụgide gburugburu ebe obibi (mmetụta kemịkalụ na n'ibu) ma na-eguzogide ọgwụ na-adịghị mma maka ịka nká. Njirimara nke polyethylene dịgasị iche site na ụdị gaa n'ụdị, tumadi dabere na nhazi ihe omimi na njupụta. Enwere ike nweta ngwaahịa ndị 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 na mmepụta ihe nkiri, akpa, ọkpọkọ, otu waya, waya na eriri, ihe ndị dị mkpa kwa ụbọchị, wdg, na enwere ike iji ya dị ka ihe mkpuchi mkpuchi dị elu maka TV, radar, wdg. Site na mmepe nke ụlọ ọrụ petrochemical, mmepụta polyethylene emeela ngwa ngwa, mmepụta nke ihe dịka 1/4 nke mmepụta plastik zuru oke. Na 1983, ngụkọta mmepụta ike nke polyethylene bụ 24.65Mt, na ike nke osisi a na-ewu bụ 3.16Mt.

Polypropylene (PP)

Resin thermoplastic kwadebere site na polymerization nke propylene. Enwere nhazi atọ nke ngwaahịa isochronous, ndị na-achịkwaghị achịkwa na interchronous, na ngwaahịa isochronous bụ akụkụ bụ isi nke ngwaahịa mmepụta ihe. Polypropylene tinyekwara copolymers nke propylene na obere ethylene. Ọtụtụ mgbe translucent enweghị agba siri ike, isi adịghị egbu egbu. N'ihi na Ọdịdị bụ idiocha na ukwuu crystallized, otú agbaze ebe ruo 167 ℃, okpomọkụ na-eguzogide, ngwaahịa nwere ike ji uzuoku disinfection bụ ya pụtara ìhè uru. Site na njupụta nke 0.90g/cm3, ọ bụ rọba dị mfe zuru ụwa ọnụ. Nguzogide corrosion, ike mgbaka 30MPa, ike, siri ike na nghọta dị mma karịa polyethylene. Ọdịmma ya bụ nguzogide mmetụta okpomọkụ dị ala na ịka nká dị mfe, nke enwere ike imeri site na mgbanwe na mgbakwunye nke antioxidant n'otu n'otu.

Agba nke akpa a kpara akpa na-adịkarị ọcha ma ọ bụ na-acha ntụ ntụ, adịghị egbu egbu na enweghị ụtọ, n'ozuzu adịghị emerụ ahụ mmadụ, ọ bụ ezie na ọ bụ plastik kemịkal dị iche iche na-eme ya, mana nchebe gburugburu ebe obibi siri ike karị, na ike imegharị ya ka ukwuu;

A na-eji akpa kpara akpa eme ihe n'ọtụtụ ebe, nke a na-ejikarị maka ịkwakọba na ịkwakọ ihe dị iche iche, nke a na-ejikarị eme ihe na ụlọ ọrụ;

A na-eji resin polypropylene mee akpa rọba dị ka ihe bụ isi akụrụngwa, nke a na-agbapụta ma gbatịa n'ime silk dị larịị, wee kpaa ya na-eme akpa.

Akpa a kpara akpa rọba ihe mejupụtara na-adabere na akwa akwa rọba, nke a na-eme site na usoro ntụgharị.

A na-eji usoro ngwaahịa a maka ịkwakọba ntụ ntụ ma ọ bụ ihe siri ike granular na isiokwu na-agbanwe agbanwe. A na-ekewa akpa rọba ihe mejupụtara akpa akpa abụọ n'ime otu yana akpa atọ n'ime otu dịka ihe mejupụtara ya siri dị.

Dị ka usoro ịkwa akwa si dị, enwere ike kewaa ya n'ime akpa akwa akwa, akwa akwa akwa, itinye akpa na akpa 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. Ndị otu abụọ ga-ekwenye nkọwapụta pụrụ iche.