Plastic tarp invention yog ib tug evolution ntev, txawm li cas los xij. Nws pib nyob rau hauv 1932, thaum cov neeg Askiv pib sim tshuaj tiv thaiv nyob rau hauv siab. Ib ntawm 50 qhov kev sim siv ethylene.
Lub hauv paus chiv keeb ntawm tarpaulin yog dab tsi?
1. Hauv cov zej zog seafaring thaum ntxov, cov neeg tsav nkoj tau hu ua tarpaulins vim tias lawv tau pw ntawm lub lawj hauv qab cov ntaub muaj zog uas tsis muaj dej tsis muaj dej. Lo lus tarpaulin los ntawm tar thiab palling-lwm lub xyoo pua 17th rau cov ntawv siv los npog cov khoom ntawm nkoj.
tarps ua los ntawm xyoo 1930 yog dab tsi?
Cov ntaub pua tsev yog tsim los ntawm ntau yam ntaub ntawv, xws li plastics, polyester, roj hmab, thiab ntau yam ntaub ntawv.
Yuav ua li cas tarps ua ntej yas?
Nyob rau xyoo 20th xyoo pua, polyurethane hloov tar, ces canvas tau hloov los ntawm woven yas. Nyob rau tib lub sijhawm, peb tau pom ntau yam kev siv rau tarps, suav nrog: khaub ncaws, kos npe, chaw ua tsiaj txhu, tsev cog khoom, fume thiab plua plav ntim, hauv ob sab phlu, kev tiv thaiv kev ua si, thiab chaw pw hav zoov rau kev ua si lossis chaw nkaum.
tarpaulins ua li cas?
Lub chaw yog xoob xoob los ntawm cov ntaub qhwv ntawm polyethylene yas, nrog cov ntawv ntawm tib cov khoom sib txuas rau saum npoo. Qhov no tsim cov ntaub zoo li cov ntaub ntawv uas tiv taus stretching zoo nyob rau hauv tag nrho cov lus qhia thiab yog waterproof. Cov ntawv tuaj yeem yog cov polyethylene tsawg ntom ntom (LDPE) lossis siab ntom polyethylene (HDPE).
