Elastomers ndi kugwiritsa ntchito kwawo.

Ma polyurethane elastomers ali m'gulu la mapulasitiki omwe amapangidwa chifukwa cha polymerization, ndipo maunyolo awo akuluakulu ali ndi magulu a urethane. Kutchulidwa kuti PUR kapena PU, ali ndi katundu wambiri. Ubwino wawo komanso mtengo wake wabwino zimapangitsa kuti elastomers ikhale chogwiritsidwa ntchito kwambiri m'mafakitale ambiri.

Katundu wa Elastomer:
Zipangizo za PUR ndizopanga zida ngati mphira. Kuchokera ku mphira amasiyana, pakati pa ena mwakuti ali ndi magawo abwinobwino amthupi ndi mankhwala kuposa momwe zimakhalira. Kuphatikiza apo, ndizotheka kupanga mawonekedwe a polyurethane elastomers m'malo osiyanasiyana. Pochita izi, izi zikutanthauza kuti PU ndi chilengedwe chonse.

Ubwino wake waukulu umaphatikizira chisonyezo chodula kwambiri, chomwe chimakwaniritsa chifukwa chokana kwambiri:

machitidwe a zinthu monga ma petulo, ma sol sol, mafuta, mafuta, sulfuric acid, soda ndi madzi amchere; Kuphatikiza apo, zinthu za PU zitha kugwira ntchito m'malo omwe pH yake ili pakati pa 5 ndi 12,
chinyezi ndi nyengo zina zovuta,
kumva kuwawa,
Kutambasula, kuphwanya ndi kuphwanya - zinthu zopangidwa ndi pulasitiki ya PUR zitha kupirira bwino kutentha kuchokera -40 ° C mpaka 80 ° C,
kukalamba.
Ndi ziti zina zomwe ma polyurethane elastomers amawonekera? Ndizoyenera kutchula pano kuti pali:

kudziletsa wozimitsa
mbale,
si chodetsa,
kasanu ndi kamodzi zopepuka kuposa chitsulo.
Kuphatikiza apo, zinthu zopangidwa ndi zinthu za PUR zimakhala ndi zinthu zabwino zosinthira ndipo zitha kugwiritsidwa ntchito ponyowa komanso youma. Pomaliza, amasiyanitsidwa ndi mawonekedwe osalala komanso owoneka bwino komanso zovuta zingapo, zomwe siziteteza kukhalabe ndi mbali yayitali.

Kodi kugwiritsa ntchito mapulasitiki a PUR ndikugwiritsa ntchito bwanji?
Ma polyurethane elastomers amagwiritsidwa ntchito kwambiri, pakati pa ena m'makina, mafakitale amakanema ndi zovala. Monga chida ngati mphira, chomwe chili ndi zinthu zabwino kwambiri kuposa za mphira zokha, ndichinthu chabwino kwambiri popanga zinthu monga:

gaskets,
zimagwira ntchito zosiyanasiyana,
osindikiza,
njinga zamkati
magudumu agalimoto yamafakitale,
scrapers
malamba oyendetsa, masitima osindikizira ndi zidutswa zamitundu yosiyanasiyana yama makina ama mafakitale,
ziguduli, ma pulo othana ndi kugwedeza ndi zinthu zina zosafunsa,
zotsekemera zamagalimoto.
Monga mukuwonera, gawo la polyurethane elastomers mu mafakitale ndilofunika, ndipo magwiritsidwe ntchito ake ndi ochulukirapo.