Polyurethane m kwayoyin sarkar ya ƙunshi carbamate kungiyar (-NHCOO-) ko isocyanate kungiyar (-NCO), raba zuwa polyisocyanate da polyurethane kashi biyu Categories. , haifar da ƙungiyoyin polyurethane ko polyurea, don haka don inganta ƙarfin tsarin da kuma cimma manufar haɗin gwiwa.
Adhesives yawanci m, tare da daban-daban curing wakili, plasticizer, fillers, kaushi, preservatives, stabilizers da hada guda biyu jamiái da kuma sauran Additives shirya. fita daya bayan daya, wanda ya wadatar da kasuwar man leda sosai.
1. Matsayin ci gaba
Polyurethane adhesive wani nau'i ne na tsaka-tsaki na tsakiya da kuma babban matsayi, wanda ke da kyakkyawan sassauci, juriya mai tasiri, juriya na sinadarai, juriya na lalacewa, kuma mafi mahimmanci shi ne ƙananan zafin jiki. polyurethane adhesives wanda ya dace da haɗin kai tsakanin abubuwa daban-daban da amfani daban-daban. An fara amfani da polyurethane a cikin aikin soja a cikin 1947. Ta hanyar kamfanin Bayer, triphenyl methane triisocyanate an yi nasarar amfani da shi a kan haɗin karfe da roba, kuma an yi amfani da shi a kan hanya. na tanki, wanda ya kafa harsashin masana'antar polyurethane.Japan ta gabatar da fasahar Jamus da Amurka a cikin 1954, ta fara samar da adhesives na polyurethane a cikin 1966, kuma ta sami nasarar samar da adhesives na vinyl polyurethane na ruwa, wanda aka sanya cikin masana'antu a cikin 1981.At a halin yanzu, bincike da kuma samar da polyurethane adhesives a Japan suna aiki sosai, kuma tare da Amurka da Yammacin Turai, Japan ta zama babbar masana'anta da kuma fitar da polyurethane.Tun daga 1980s, polyurethane adhesives sun ci gaba da sauri, kuma yanzu sun zama. iri-iri iri-iri da masana'antu da ake amfani da su sosai.
A shekarar 1956, kasar Sin ta ƙera tare da samar da triphenyl methane triisocyanate (Lekner adhesive), kuma nan da nan ta samar da toluene diisocyanate (TDI) da kuma polyurethane mai sassauki mai sassa biyu, wanda har yanzu shine mafi girman nau'in polyurethane a kasar Sin. ya gabatar da manyan layukan samarwa da kayayyaki da yawa daga ketare, inda ake buƙatar babban adadin polyurethane da aka shigo da su don tallafa musu, don haka haɓaka haɓakar adhesives na polyurethane a cikin rukunin bincike na cikin gida.Musamman bayan 1986, masana'antar polyurethane a China sun shiga wani lokaci. na ci gaba mai sauri.A cikin 'yan shekarun nan, farashin manne polyurethane yana raguwa, kuma farashin yanzu na manne polyurethane yana da kusan 20% sama da na manne chloroprene, wanda ke ba da yanayi don manne polyurethane don mamaye kasuwar manne chloroprene.
Lokacin aikawa: Maris-03-2021