Polyurethane (PU), orukọ kikun ti polyurethane, jẹ apopọ polima, eyiti a ṣe ni 1937 nipasẹ Otto Bayer ati awọn miiran. Polyurethane ni awọn ẹka akọkọ meji: polyester ati polyether. Wọn le ṣe sinu awọn pilasitik polyurethane (paapaa foomu), awọn okun polyurethane (ti a mọ ni spandex ni Ilu China), roba polyurethane ati awọn elastomers. Polyurethane jẹ ohun elo polima ti o dara julọ fun lilo bi ideri kẹkẹ ni iṣelọpọ awọn simẹnti ile-iṣẹ.
Awọn anfani akọkọ ti awọn casters polyurethane jẹ bi atẹle:
Ni akọkọ, iṣẹ ti iwọn adijositabulu
Nọmba awọn afihan iṣẹ ṣiṣe ti ara ati ẹrọ ni a le ṣatunṣe nipasẹ yiyan ti awọn ohun elo aise ati awọn agbekalẹ, laarin iwọn kan ti awọn iyipada rọ, lati le pade awọn ibeere alailẹgbẹ olumulo fun iṣẹ ọja.
Keji, superior abrasion resistance
Ni iwaju omi, epo ati awọn ipo iṣiṣẹ media wetting miiran, awọn casters polyurethane wọ resistance jẹ igbagbogbo ni ọpọlọpọ igba si awọn dosinni ti awọn ohun elo roba lasan. Awọn ohun elo irin gẹgẹbi irin ati lile miiran, ṣugbọn kii ṣe dandan ni sooro!
Kẹta, awọn ọna ṣiṣe, lilo jakejado
Polyurethane elastomers le ṣe apẹrẹ pẹlu roba idi gbogbogbo nipasẹ ṣiṣu, dapọ ati vulcanizing (MPU); wọn tun le ṣe sinu rọba olomi, sisọ ati sisọ tabi sisọ, lilẹ ati mimu centrifugal (CPU); wọn tun le ṣe sinu awọn ohun elo granular ati awọn pilasitik arinrin nipasẹ abẹrẹ, extrusion, calendering, gbigbẹ fifun ati awọn ilana miiran (CPU). Mọ tabi abẹrẹ in awọn ẹya ara, laarin kan awọn líle ibiti, tun le ge, lilọ, liluho ati awọn miiran darí processing.
Ẹkẹrin, idaabobo epo, osonu resistance, ti ogbo resistance, Ìtọjú resistance, kekere otutu resistance, ti o dara ohun gbigbe, lagbara alemora agbara, o tayọ biocompatibility ati ẹjẹ ibamu. Awọn anfani wọnyi jẹ deede idi idi ti polyurethane elastomers ti wa ni lilo pupọ ni ologun, afẹfẹ, acoustics, isedale ati awọn aaye miiran.
Akoko ifiweranṣẹ: Oṣu Kẹwa-30-2023