Yas txhais tias pliable los yog impressionable. Nws txhais tau tias yog qhov muaj peev xwm ua tsis tau zoo los ntawm qhov tsis muaj kev sib nraus .Txawm qhov txhais no, cov yas yuav muaj xws li iav, hlau thiab siv cuav .Yog li, nws yog qhov tseeb tias lub npe yas yog kev tsis txaus siab thiab tsis thwj. Hnub no, txawm li cas los xij, lo lus "yas" yog txhais los ntawm cov khoom uas muab los ntawm cov khoom siv hluavtaws.
Hnub no lub hnab yas pom muaj nyob rau hauv tsev, tsheb, ntau yam khoom thiab tshuab. Qee cov cav tov uas siv hluav taws xob yuav tsum tau siv cov khoom yas nrog cov hluav taws xob insulating.
Plastics feem ntau xa tuaj rau cov nroj tsuag ua pellets lossis powers, thiab lawv yaj ua ntej ntawm txoj kev ua zoo .Plastics kuj muaj li ntawv, phaj, qws, thiab tubing, uas yuav tsim tau ntau yam khoom .Liquid plastics siv tshwj xeeb tshaj yog nyob rau hauv kev txiav txim siab ntawm cov cuab tam reinforced.
Plastics lossis polymers, feem ntau hu ua plastics, poob mus rau ob chav kawm:
Cov ntaub ntawv thermoplastic muaj xws li cov phom sij xws li ABS thiab polycarbonate siv cov khoom ua si, cov neeg siv khoom siv hluav taws xob thiab khoom siv tau ntau yam khoom noj. Cov khoom siv thermoplastic nplua nrog cua kub thiab sib zog thiab txias nrog txias .Qhov nta tseem ceeb yog tias cov ntaub ntawv no tau muab tshem tawm tau ntau yam dej , molded thiab txias lub sij hawm tom qab tsis tas muaj kev tsim nyog tshuaj hloov, piv txwv li qhov hloov yog reversible.
Cov ntaub ntawv thermosetting cov ntaub ntawv -thaum muaj xws li cov melamine-formaldehyde siv hauv cov ntaub ntawv yas yas thiab cov epoxy resins siv rau kev zoo siab thiab siv cov khoom siv xws li cov kayaks thiab cov ntaus pob tw nkoj. pwm, thiab mam li pub kom zoo.
Raws li cov ntaub ntawv thermosetting, kev sib tw tshuaj txuas ua rau tshwm sim los ua kom tsis muaj zog, tsis muaj zog. Thaum siv cov thermosetting plastics soften thiab yaj, thiab nyob rau hauv siab lawv yuav ua rau txhua qhov kab uas muaj pwm cov kab noj hniav .Txhua niaj hnub siv cov cua kub hnyiab lawv polymerize los yog siv tshuaj hloov, uas ua rau lawv mob mus tas li, tsis muaj peev xwm, thiab insoluble state .Tom qab tom qab no lawv rov tsis tau muag lossis yaj los ntawm cua kub ntxiv.