Hom Woven Luggage Bags

Kev tsim tawm txawv teb chaws feem ntau siv polyethylene (PE), thaum cov khoom siv hauv tsev feem ntau siv polypropylene (PP), thermoplastic resin tau los ntawm polymerizing ethylene. Kev lag luam, nws kuj suav nrog copolymers ntawm ethylene nrog me me ntawm -olefins. Polyethylene tsis muaj ntxhiab tsw, tsis yog - tshuaj lom, thiab muaj kev xav zoo. Nws muaj qhov ua tau zoo heev qis- qhov kub thiab txias tsis kam (tsawg kawg ua haujlwm kub tuaj yeem ncav cuag -70 txog -100 degree), tshuaj lom neeg ruaj khov zoo, thiab ua haujlwm rau feem ntau cov kua qaub thiab alkalis (tshwj tsis yog oxidizing acids). Nws yog insoluble nyob rau hauv ntau cov kuab tshuaj nyob rau hauv lub chav tsev kub, muaj tsawg dej nqus, thiab zoo heev hluav taws xob rwb thaiv tsev zog; Txawm li cas los xij, polyethylene yog rhiab heev rau ib puag ncig kev ntxhov siab (tshuaj lom neeg thiab cov khoom siv hluav taws xob) thiab muaj cov cua sov tsis zoo.

 

Cov khoom ntawm polyethylene sib txawv nyob ntawm ntau yam, feem ntau txiav txim siab los ntawm nws cov qauv molecular thiab ntom. Cov txheej txheem ntau lawm tawm los ntawm cov khoom sib txawv (0.91-0.96 g / cm³). Polyethylene tuaj yeem ua tiav siv cov txheej txheem thermoplastic molding (saib Plastics Processing ). Nws daim ntawv thov yog dav heev, feem ntau yog siv los tsim cov yeeb yaj kiab, ntim, kav, monofilaments, xov hlau thiab cables, khoom siv txhua hnub, thiab lwm yam, thiab nws kuj tseem siv tau los ua cov khoom siv hluav taws xob ntau zaus rau TV, radar, thiab lwm yam. Nrog rau kev loj hlob ntawm petrochemical kev lag luam, polyethylene ntau lawm tau loj hlob sai, accounting rau ib tug ntau ntawm cov yas {8}. Xyoo 1983, lub ntiaj teb tag nrho cov khoom siv polyethylene yog 24.65 Mt, nrog rau kev tsim kho ntxiv 3.16 Mt.

 

Polypropylene (PP) yog ib qho thermoplastic cob uas tsim los ntawm polymerizing propylene. Nws muaj nyob rau hauv peb configurations: isotactic, atactic, thiab syndiotactic, nrog isotactic yog lub ntsiab tseem ceeb hauv cov khoom lag luam. Polypropylene kuj suav nrog copolymer ntawm propylene thiab me me ntawm ethylene. Nws feem ntau yog cov khoom translucent, tsis muaj xim, tsis muaj ntxhiab thiab tsis yog - lom. Vim nws cov qauv tsis tu ncua thiab siab crystallinity, nws muaj qhov siab melting point ntawm 167 degree, ua rau nws tshav kub- tiv taus thiab tso cai rau kev ua kom tsis muaj menyuam ntawm cov khoom-ib qho txiaj ntsig tseem ceeb. Nrog qhov ceev ntawm 0.90 g / cm³, nws yog lub teeb tshaj plaws - lub hom phiaj yas. Nws yog corrosion{12}}resistant, muaj lub zog tensile ntawm 30 MPa, thiab nws lub zog, nruj, thiab pob tshab yog zoo dua li polyethylene. Nws qhov tsis zoo suav nrog qhov tsis zoo - qhov kub thiab txias tsis kam tiv thaiv thiab nyiam lub hnub nyoog, tab sis cov no tuaj yeem kov yeej los ntawm kev hloov kho thiab ntxiv cov tshuaj antioxidants.