Olimba thovu pachimake zinthu Zoyimira, mabizinesi ndi ntchito zatsopano za polyurethane, phenolic resin, PET, PVC, SAN, PES ndi zinthu zina thovu.

Olimba thovu pachimake zinthu Zoyimira, mabizinesi ndi ntchito zatsopano za polyurethane, phenolic resin, PET, PVC, SAN, PES ndi zinthu zina thovu.

Pakatikati mwa thovu ndi chinthu chophatikizika, nthawi zambiri ndi polima ya thermoset (koma imatha kukhala thermoplastic) yophatikizidwa ndi mpweya wocheperako (monga nayitrogeni) kapena wowombetsa mankhwala panthawi yakuumba.Zotsatira zake sizinthu zolimba, koma chithovu chochepa cha microcellular chophatikizidwa ndi chipolopolo chapamwamba kwambiri.

Chithovu chapakati chimachepetsa kulemera kwazinthu zonse, pamene khungu lolimba limapangitsa kuti likhale lolimba komanso losakhudzidwa.Mapangidwe azinthuzo amafanana ndi sangweji, yokhala ndi tsinde laling'ono lozunguliridwa kwathunthu ndi khungu lapamwamba.Chifukwa cha mawonekedwe ake apadera, zida zolimba za thovu nthawi zambiri zimakhala zopepuka 20% mpaka 40% kuposa ma polima olimba, aluminiyamu, chitsulo, ma sheet, kapena zida zina zomwe zimagwiritsidwa ntchito kwambiri.Chifukwa cha kulimba kwake, zida zoyambira zomwe zimagwiritsidwa ntchito popanga thovu nthawi zambiri zimakhala ma polima a thermoplastic osati ma thermosets.Ma thermoplastics omwe amagwiritsidwa ntchito nthawi zambiri amaphatikizapo, koma osati okhawo: polyurethane, polycarbonate, polyphenylene ether (Noryl), polybutylene terephthalate (Valox) ndi acrylonitrile butadiene styrene ndi zipangizo zina za thovu: polyurethane, phenolic Resin, PET, PVC, SAN, PES thovu. malonda, malonda ndi ntchito zatsopano.

Polyurethane thovu pachimake amapangidwa kuchokera CFC free thovu polyurethane, chotchinga selo pachimake chimene chimatha kupanga facestocks, matabwa ndi zopangidwa mwambo wa kachulukidwe zosiyanasiyana ndi makulidwe, pamene mkulu kachulukidwe, lawi retardant olimba polyurethane thovu mapepala Wood, midadada kapena akamaumbidwe ziliponso.Zotsika mtengo, zosunthika komanso zolimba.Ngakhale mawonekedwe a polyurethane foam cores sangakhale oyenera kugwiritsa ntchito movutikira, amagwiritsidwa ntchito kwambiri kukulitsa makulidwe, kupanga mawonekedwe ophatikizika, mawonekedwe oteteza, komanso kuyandama.

Polyurethane thovu cores ndi njira yotsika mtengo kwambiri kwa opanga magulu.Foam yolimba ya polyurethane imagwiritsidwa ntchito poyandama, kutchinjiriza kapena ngati chinthu chapakati monga kukulitsa zokwera zam'madzi, ziboliboli ndi ntchito zina zapanyanja.

Makina Odulira Siponji