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Polyurethane adhesives - ọdịnihu nke kpakpando nke nrapado

Polyurethane adhesive molekụla yinye nwere carbamate otu (-NHCOO-) ma ọ bụ isocyanate otu (-NCO), kewara n'ime polyisocyanate na polyurethane abụọ. , mepụta otu polyurethane ma ọ bụ polyurea, iji mee ka ike nke usoro ahụ ka mma ma mezuo nzube nke ijikọ.

Ihe nnogide bu ihe ndi ozo, ya na ndi ogwu di iche iche, ihe ndi ozo, ihe ndi ozo, ihe ndi ozo, ndi nchebe, ndi na eme ka ndi mmadu na ndi ozo na ndi ozo ndi ozo edobere. N'ime afọ ndị na-adịbeghị anya, na ngwa ngwa ngwa ngwa nke mmepe nke ihe onwunwe, ọtụtụ nrapado na ntinye siri ike bịara. otu onye na-aga nke ọzọ, nke mere ka ụlọ ọrụ ọnya baa ọgaranya.

1. Ọkwa mmepe

Polyurethane nrapado bụ ụdị nke dị n'etiti na elu ọkwa nrapado, nke nwere magburu onwe mgbanwe, mmetụta na-eguzogide, chemical-eguzogide, na-eyi ndị na-eguzogide, na ihe kasị mkpa bụ ya ala okpomọkụ resistance.By ukpụhọde akụrụngwa na usoro, anyị nwere ike chepụta a dịgasị iche iche nke polyurethane adhesives bụ ndị kwesịrị ekwesị maka njikọta n'etiti ihe dị iche iche na ojiji dị iche iche.Ebu ụzọ mbụ eji eme ihe eji eme ihe na polyurethane na mpaghara ndị agha na 1947. Site na ụlọ ọrụ Bayer, a na-etinye triphenyl methane triisocyanate nke ọma na njikọta nke igwe na roba, ma jiri ya na egwu Japan, nke webatara teknụzụ German na American na 1954, malitere ịmepụta polyurethane nrapado na 1966, wee mepụta nke ọma vinyl polyurethane nrapado nke mmiri, bụ nke e tinyere na mmepụta nke ụlọ ọrụ na 1981. ugbu a, nyocha na imepụta nke polyurethane adhesives na Japan na-arụsi ọrụ ike, yana U edebere mba na Western Europe, Japan abụrụla nnukwu onye nrụpụta na onye na-ebupụ polyurethane. Kemgbe 1980s, polyurethane adhesive amalitela ngwa ngwa, ma ugbu a, ha abụrụla ụlọ ọrụ dịgasị iche iche na ndị ọtụtụ ebe.

Na 1956, China mepụtara ma mepụta triphenyl methane triisocyanate (Lekner adhesive), n'oge na-adịghịkwa anya mepụtara toluene diisocyanate (TDI) na ngwongwo polyurethane nke nwere ihe mgbaze abụọ, nke ka bụ ụdị polyurethane kachasị ukwuu na China. Kemgbe ahụ, China nwere webatara ọtụtụ usoro mmepụta na ngwaahịa sitere na mba ofesi, nke achọrọ ọtụtụ polyurethane adhesive iji kwado ha, si otú a na-akwalite mmepe nke nrapado polyurethane na ngalaba nyocha ụlọ.Ọ kachasị mgbe afọ 1986 gasịrị, ụlọ ọrụ polyurethane dị na China abanyela oge nke ngwa ngwa n'ime afọ ndị na-adịbeghị anya, ọnụahịa nke polyurethane gluu na-ebelata, na ọnụahịa nke polyurethane gluu bụ naanị ihe dị ka 20% dị elu karịa nke klọpị chloroprene, nke na-enye ọnọdụ maka polyurethane gluu iji were ahịa chloroprene gluu.


Post oge: Mar-03-2021