Vim li cas cov neeg ua ke PU

Nyob rau hauv ib puag ncig txias hauv qab 0℃tshwj xeeb tshaj yog nyob nruab nrab -10 degree, kev ua tau zoo yooj yim los ntawm cov kub. PU (Polyurethane) Cov castters feem ntau ua tau zoo dua PA (Nylon) casersers. Cov laj thawj tseem ceeb yog li nram qab no:

Kuj tseem tsis tshua muaj - kub tawm dag zog:

Pa: molecular hydrogen bonds ntxiv dag zog rau thaum tsis kub, ua rau muaj qhov sib luag hauv qhov chaw siab. Txawm li cas los xij, nws yog qhov raug cuam tshuam rau brittleness thiab kev tawg hauv qab -10 degree, txo qis nws cov kev cuam tshuam tsis kam.

PU: Molecular Chains muaj cov ntu ntu, tswj elasticity ntawm tsawg kub. Siab - Zoo, txias} {{ove} est estive pu tuaj yeem tswj cov cuam tshuam ntawm -40℃thiab tiv thaiv tawg.

Elasticity thiab doving kev ua tau zoo:

PA: ntawm tsawg kub, nws kiag li poob nws elasticity thiab ua tsis tau, ua rau nrov nrov, ntxias dag zog, thiab qoj xoob.

PU: Nws zoo kawg nkaus elasticity pab Cushion tsis txawv chaw, kom ntseeg tau smoother thiab quieter dov.

Qhov seem ruaj khov:

PA: Nws muaj cov dej nqus dej siab. Thaum tsawg kub yog nrog cov kev hloov pauv ntawm cov av noo, khov ntawm cov dej los yog shrinkage ntawm cov khoom yuav ua rau muaj kev hloov sab nraud, cuam tshuam smoothness.

PU: Kev nqus dej qis, tsawg tsawg tsawg - kub kub, thiab lub log ruaj khov, thiab cov log txhim kho kom haum.

Ntev - lo lus ruaj khov thiab hloov tau:

PA: lub caij nyoog qis tsawg los yog khov -} thaw cycles tuaj yeem kho cov laus thiab tawg.

PU: Cold - Tsis txhob haum rau cov khoom muag muag lossis ntxiv rau cov khoom siv kub (qis} PU tus elasticity tseem tiv thaiv cov chaw mos (xws li txias cia vinyl flooring) ntawm tsawg kub.

Sau ntawv rau cov xwm txheej tshwj xeeb:

Tsawg - kub, siab} {l}} Hardness, txias} Tsis kam lees Pu (Shore} Tus Thawj Coj 85-95).

Muaj roj / tshuaj lom neeg: anti {- o pu cov qauv yog yuav tsum tau ua.

Huab cua txias (hauv qab - 40 degree): resistant r resistant pev casters yog qhov tseem ceeb.

Ntsiab lus:
PU (tshwj xeeb yog txias} {}} cov kev xaiv tsis yooj yim, thiab kev xaiv qhov chaw txias, thiab sab nraum zoov qis- kub ua haujlwm. Pa Casters tau nkig thiab nrov ntawm qis kub thiab tsuas pom zoo rau kev siv tus nqi {}} Cov xwm txheej uas kub nyob ib puag ncig 0 degree.