Elastomers thiab lawv cov ntawv thov.

Polyurethane elastomers tau koom nrog cov pab pawg ntawm cov plastics, uas tsim los ntawm polymerization, thiab lawv cov saw tseem ceeb muaj cov pawg urethane. Xa mus rau li PUR lossis PU, lawv muaj ntau lub zog. Lawv qhov zoo thiab muaj txiaj ntsig zoo ua rau elastomers cov khoom siv dav siv hauv ntau qhov kev lag luam.

Cov khoom siv Elastomer:
Cov ntaub ntawv PUR yog cov khoom siv zoo li ntoo roj hmab. Los ntawm roj hmab lawv txawv, ntawm lwm tus nyob rau hauv uas lawv muaj qhov zoo dua ntawm lub cev thiab tshuaj dua li nws muaj. Tsis tas li ntawd, nws muaj peev xwm teeb tsa cov khoom ntawm polyurethane elastomers hauv ntau qhov dav. Hauv kev xyaum, qhov no txhais tau tias PU yog cov khoom siv dav.

Nws qhov zoo tshaj plaws suav nrog lub siab siv exploit dhau los, uas nws ua tiav ua tsaug rau nws txoj kev tawm tsam siab rau:

qhov kev ua ntawm cov tshuaj lom neeg xws li roj av, kuab tshuaj, roj, roj, sulfuric acid, caustic sis dej qab zib lossis dej qab ntsev; ntxiv rau, PU cov khoom lag luam tuaj yeem ua haujlwm hauv ib qho chaw uas nws tus pH yog nruab nrab ntawm 5 txog 12,
ya raws thiab lwm cov huab cua tsis zoo,
puas,
ncab, kua muag thiab nrib pleb - cov khoom uas ua los ntawm PUR yas yuav tiv taus qhov kub thiab txias ntawm -40 ° C mus txog 80 ° C,
laus.
Dab tsi lwm cov nta ua polyurethane elastomers sawv tawm? Nws yog yeej muaj nqis hais no uas muaj:

self-extinguishing
cov phiaj,
uas tsis yog-npav,
rau lub sij hawm sib dua li hlau.
Ntxiv rau, cov khoom uas ua los ntawm cov khoom PUR muaj qhov zoo tshaj plaws kev co damping thiab tuaj yeem siv tau nyob rau hauv ob qho tib si ntub thiab qhuav. Thaum kawg, lawv pom qhov txawv los ntawm qhov du thiab ci ci thiab muaj qhov sib txawv ntawm qhov nyuaj, uas tsis txwv qhov khaws cia qhov tseem ceeb elongation.

Dab tsi yog kev siv PUR plastics?
Polyurethane elastomers feem ntau siv, thiab lwm yam hauv kev siv tshuab, tshuaj thiab textile kev lag luam. Raws li cov khoom siv roj hmab zoo li, muaj cov khoom uas zoo dua li cov roj hmab nws tus kheej, nws yog cov khoom siv zoo heev rau kev tsim cov khoom lag luam xws li:

gaskets,
lub week,
luam ntawv chais,
lub tsheb kauj vab sab hauv txoj hlab,
lub tsheb muaj log,
scrapers
tsav siv tawv, nias nres thiab kaw lub nrig rau ntau hom kev lag luam tshuab,
chais tshuab, los tiv thaiv kev co thiab lwm yam damping,
lub tsheb poob siab absorber.
Raws li koj tuaj yeem pom, lub luag haujlwm ntawm polyurethane elastomers hauv kev lag luam yog qhov tseem ceeb, thiab qhov ntau ntawm lawv siv yog qhov dav heev.