Polyurethane adhesive molecular chain nwere otu carbamate (-NHCOO-) ma ọ bụ otu isocyanate (-NCO), kewara n'ime polyisocyanate na polyurethane abụọ. , na-emepụta otu polyurethane ma ọ bụ polyurea, ka o wee mee ka ike nke usoro ahụ dịkwuo mma ma nweta nzube nke njikọ.
Adhesives na-abụkarị ihe nrapado, nwere ihe dị iche iche na-agwọ ọrịa, plasticizer, fillers, solvents, preservatives, stabilizers and coupling agents and other additives kwadebere. pụta n'otu n'otu, nke mere ka ahịa nrapado bara ụba nke ukwuu.
1. Ọnọdụ mmepe
Polyurethane adhesive bụ ụdị nke etiti na ọkwa ọkwa dị elu, nke nwere mgbanwe dị mma, nkwụsị mmetụta, nkwụsị nke kemịkalụ, na-eyi ihe mgbochi, na ihe kachasị mkpa bụ nkwụsị okpomọkụ ya dị ala. Site n'ịgbanwe ngwa ngwa na usoro, anyị nwere ike ịmepụta ụdị dị iche iche. polyurethane adhesives nke dị mma maka njikọ dị n'etiti ihe dị iche iche na ihe dị iche iche. A na-eji eriri polyurethane mee ihe na agha ndị agha na 1947. Site na ụlọ ọrụ Bayer, triphenyl methane triisocyanate na-arụ ọrụ nke ọma na njikọ nke ígwè na roba, ma jiri ya mee ihe na egwu. nke tank, nke tọrọ ntọala maka ụlọ ọrụ ntanye nke polyurethane.Japan webatara nkà na ụzụ German na American na 1954, malitere ịmepụta polyurethane adhesives na 1966, na-emepụta nke ọma na-emepụta mmiri nke vinyl polyurethane adhesives, bụ nke etinyere na mmepụta mmepụta ihe na 1981.At. ugbu a, nchọpụta na mmepụta nke polyurethane adhesives na Japan na-arụsi ọrụ ike, yana ọnụ na United States na Western Europe, Japan aghọwo onye na-emepụta ihe na-emepụta ihe na-ebupụ polyurethane. Ebe ọ bụ na 1980, adhesives polyurethane na-etolite ngwa ngwa, ma ugbu a, ha aghọwo ndị na-emepụta ihe na ndị na-ebupụ polyurethane. ụlọ ọrụ dịgasị iche iche na nke a na-ejikarị eme ihe.
N'afọ 1956, China mepụtara ma mepụta triphenyl methane triisocyanate (Lekner adhesive), n'oge na-adịghịkwa anya, ọ na-emepụta toluene diisocyanate (TDI) na polyurethane adhesive nke nwere akụkụ abụọ, bụ nke ka bụ ụdị polyurethane kachasị ukwuu na China. ewebata ọtụtụ ahịrị mmepụta ihe dị elu na ngwaahịa sitere na mba ọzọ, bụ nke a na-achọ ọnụ ọgụgụ dị ukwuu nke adhesives polyurethane na-ebubata iji kwado ha, si otú ahụ na-akwalite mmepe nke polyurethane adhesives na ụlọ nyocha ụlọ. Karịsịa mgbe 1986 gasịrị, ụlọ ọrụ polyurethane na China abanyela oge. nke mmepe ngwa ngwa.N'ime afọ ndị na-adịbeghị anya, ọnụahịa nke polyurethane gluu na-ebelata, na ọnụahịa nke polyurethane gluu dị ugbu a dị ihe dị ka 20% dị elu karịa nke gluu chloroprene, nke na-enye ọnọdụ maka polyurethane gluu iji nọrọ n'ahịa gluu chloroprene.
Oge nzipu: Mar-03-2021