Njira yosinthira zisindikizo za polyurethane

Zisindikizo zosinthika za polyurethane ndi zida zabwino kwambiri zosindikizira zomwe zimakana kuvala, dzimbiri komanso kutentha kwambiri ndipo zimagwiritsidwa ntchito m'mafakitale osiyanasiyana.Nkhaniyi ifotokoza zoyambira, madera ogwiritsira ntchito komanso ubwino wa zisindikizo za polyurethane.Zisindikizo zimatchedwanso zisindikizo kapena zisindikizo zamafuta, zimapangidwa ndi gawo limodzi kapena zingapo za chivundikiro chooneka ngati mphete, chokhazikika mumtengo, chokhala ndi mphete, ndi mphete zina kapena kukhudzana kwa gaskets kapena kupanga kusiyana kocheperako kwa labyrinth, kusewera. ntchito yolekanitsa mafuta ndi gasi wamadzimadzi, kuteteza mafuta kusefukira kapena kudutsa ndi kuwukira kwa zinthu zakunja.Panthawi imodzimodziyo, imatha kupiriranso kupanikizika, mkati mwamtundu wina ndi ntchito ziwiri za kunyamula ndi kusindikiza.Anatembenuza polyurethane zisindikizo, ndi kuvala zosagwira, mafuta, asidi, ozoni, ukalamba, kutentha otsika, misozi, zimakhudza ndi makhalidwe ena, kutembenuza polyurethane zisindikizo katundu thandizo mphamvu, chimagwiritsidwa ntchito m'madera osiyanasiyana.Mwachidule, zisindikizo za polyurethane zili ndi zabwino zambiri ndipo zimatha kugwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana.Chifukwa chake, posankha zinthu zosindikizira, zisindikizo za polyurethane ndizosankha zabwino.

Kupambana kwa polyurethane ngati chosindikizira kunabwera kumayambiriro kwa zaka za m'ma 1980, pomwe opanga angapo adapanga zida za polyurethane zomwe zinali zolimba ku hydrolysis.Zida zatsopanozi zinapanga zisindikizo za polyurethane zomwe zinakhalabe zosinthasintha pazovuta kwambiri komanso mpaka +110 ° C, kukwaniritsa ntchito yabwino yosindikiza komanso moyo wautali wogwira ntchito kuposa polyurethane yoyambirira (yomwe inkangolimbana ndi kutentha kwakukulu kwa +80 ° C).Chotsatirachi chimatsegula chitseko cha kugwiritsa ntchito ma hydraulic pamakina am'manja.