Polyethylene (PE) yog tsim nyob rau hauv txawv teb chaws lub teb chaws, thiabPolypropylene(PP) yog tsim nyob rau hauv Suav teb.Nws yog ib hom thermoplastic resin ua los ntawm polymerization ntawm ethylene.Hauv kev lag luam, copolymers ntawm ethylene nrog me me ntawm α - olefins kuj suav nrog.Polyethylene yog odorless, nontoxic, waxy, nrog zoo heev kub tsis kam (qhov kub qis tshaj tuaj yeem ncav cuag - 70 ~ - 100 ℃), tshuaj lom neeg ruaj khov, resistant rau feem ntau cov kua qaub thiab alkali yaig (tsis resistant rau oxidizing acid), insoluble nyob rau hauv cov kuab tshuaj. nyob rau hauv chav tsev kub, tsis tshua muaj dej nqus thiab zoo heev hluav taws xob rwb thaiv tsev;tab sis polyethylene yog rhiab heev rau ib puag ncig kev nyuaj siab (tshuaj lom neeg thiab mechanical kev txiav txim) Lub tshav kub aging kuj tsis zoo.Cov khoom ntawm polyethylene sib txawv los ntawm ntau yam mus rau ntau yam, feem ntau nyob ntawm tus qauv molecular thiab ntom.Qhov sib txawv ntawm qhov sib txawv (0.91-0.96 g / cm3) ntawm cov khoom tuaj yeem tau txais los ntawm cov txheej txheem ntau lawm.
Polyethylene tuaj yeem ua tiav los ntawm txoj kev molding ntawm cov thermoplastic dav dav (saib cov txheej txheem yas).Nws yog dav siv hauv kev ua yeeb yaj kiab, ntim khoom, kav dej, monofilaments, xov hlau thiab cables, khoom siv txhua hnub, thiab lwm yam. nws kuj tseem siv tau los ua cov khoom siv hluav taws xob ntau zaus rau TV, radar, thiab lwm yam. Nrog rau kev txhim kho ntawm kev lag luam petrochemical, kev tsim khoom. ntawm polyethylene tau tsim sai heev, thiab cov zis tso nyiaj rau li 1/4 ntawm tag nrho cov khoom yas.Nyob rau hauv 1983, tag nrho cov peev xwm ntawm polyethylene nyob rau hauv lub ntiaj teb no yog 24.65 MT, thiab lub peev xwm ntawm cov nroj tsuag nyob rau hauv kev tsim kho yog 3.16 Mt.
Polypropylene(PP)
Ib qho thermoplastic cob tau los ntawm polymerization ntawm propylene.Muaj peb qhov teeb meem ntawm isotactic khoom, random khoom thiab syndiotactic khoom.Cov tshuaj isotactic yog cov khoom tseem ceeb ntawm cov khoom lag luam.Polypropylenekuj suav nrog copolymers ntawm propylene nrog me me ntawm ethylene.Feem ntau translucent xim tsis muaj xim, tsw ntxhiab tsis muaj tshuaj lom.Vim nws cov qauv tsis tu ncua thiab siab crystallization, lub melting point yog siab li 167 ℃, thiab cov khoom yuav sterilized los ntawm chav.Qhov ceev yog 0.90g / cm3, uas yog lub lightest dav yas.Corrosion kuj, tensile zog 30MPa, lub zog, rigidity thiab pob tshab yog zoo dua li polyethylene.Qhov tsis zoo yog qhov tsis zoo ntawm qhov kub thiab txias tsis kam tiv thaiv thiab kev laus yooj yim, uas tuaj yeem kov yeej los ntawm kev hloov kho thiab ntxiv cov antioxidant raws.
Xim ntawmhnab wovenfeem ntau yog dawb lossis grey dawb, tsis muaj tshuaj lom thiab tsis qab, thiab feem ntau tsis muaj teeb meem rau tib neeg lub cev.Txawm hais tias nws yog ua los ntawm ntau yam tshuaj yas, nws cov kev tiv thaiv ib puag ncig muaj zog, thiab nws lub zog rov ua dua tshiab yog loj;
Woven hnabs yog siv dav, feem ntau yog siv rau kev ntim khoom thiab ntim ntau yam khoom, thiab siv dav hauv kev lag luam;
Yashnab wovenyog ua los ntawmPolypropyleneresin raws li cov khoom siv tseem ceeb, uas yog extruded thiab ncab rau hauv lub tiaj tiaj, ces woven thiab ua rau hauv hnab.
Composite yashnab wovenyog ua los ntawm yas woven ntaub los ntawm daim kab xev casting.
Cov khoom siv no yog siv los ntim cov hmoov los yog cov khoom siv granular thiab cov khoom siv tau yooj yim.Cov yas sib xyawhnab wovenmuab faib ua ob nyob rau hauv ib lub hnab thiab peb nyob rau hauv ib lub hnab raws li cov khoom tseem ceeb muaj pes tsawg leeg.
Raws li txoj kev xaws, nws tuaj yeem muab faib ua lub hnab xaws hauv qab, xaws ntug hauv qab hnab, ntxig lub hnab thiab nplaum hnab xaws.
Raws li qhov dav dav ntawm lub hnab, nws tuaj yeem muab faib ua 350, 450, 500, 550, 600, 650 thiab 700mm, thiab cov lus tshwj xeeb yuav tsum tau pom zoo los ntawm tus neeg muag khoom thiab tus neeg thov.
Post lub sij hawm: May-10-2021