Polyurethane adhesive molecular kaulahao loaʻa ka carbamate pūʻulu (-NHCOO-) a i ole isocyanate pūʻulu (-NCO), maheleia i polyisocyanate a me polyurethane elua waeʻano.Polyurethane adhesives, ma o ka hopena o isocyanate pūʻulu i loko o ka'ōnaehana a me nā mea i loaʻa ka ikaika hydrogen i loko a i waho o ka pūnaewele. , hana i nā hui polyurethane a i ʻole polyurea, i mea e hoʻomaikaʻi nui ai i ka ikaika o ka ʻōnaehana a hoʻokō i ke kumu o ka hoʻopaʻa ʻana.
Hoʻopili nui ʻia nā mea hoʻopili, me nā mea hoʻōla like ʻole, plasticizer, fillers, solvents, preservatives, stabilizers a me nā mea hoʻohui a me nā mea hoʻohui ʻē aʻe i hoʻomākaukau ʻia. mai kekahi ma hope o kekahi, ka mea i waiwai nui i ka mākeke paʻa.
1. kūlana hoʻomohala
ʻO ka polyurethane adhesive kahi ʻano o ka waena a me ka papa kiʻekiʻe adhesive, he mea hiki ke hoʻololi maikaʻi ʻia, ka hopena o ka hopena, ke kūpaʻa kemika, ka pale ʻana i ka lole, a ʻo ka mea nui loa ka haʻahaʻa haʻahaʻa haʻahaʻa. polyurethane adhesives i kūpono no ka hoʻopaʻa ʻana ma waena o nā mea like ʻole a me nā mea like ʻole. o ka pahu, ka mea i kau i ke kumu no ka polyurethane adhesive industry.Iapana hoʻolauna German a me ka 'ike loea ma 1954, hoomaka ae la e hana polyurethane adhesives ma 1966, a me ka holomua hoʻomohala wai-ma muli vinyl polyurethane adhesives, i hoʻokomo 'ia i loko o ka hana hana ma 1981. i kēia manawa, ua ikaika loa ka noiʻi a me ka hana ʻana o nā mea hoʻopili polyurethane ma Iapana, a me ʻAmelika Hui Pū ʻIa a me ʻEulopa Komohana, ua lilo ʻo Iapana i mea hana nui a me ka mea kūʻai aku i ka polyurethane. kahi ʻano ākea a hoʻohana nui ʻia.
I ka makahiki 1956, ua kūkulu ʻo Kina a ua hoʻopuka ʻo ia i ka triphenyl methane triisocyanate (Lekner adhesive), a ua hoʻopuka koke ʻo ia i ka toluene diisocyanate (TDI) a me ʻelua mau mea hoʻoheheʻe-ma muli o ka polyurethane adhesive, ʻo ia ka mea nui loa o ka polyurethane adhesive ma Kina. Mai ia manawa, ua loaʻa iā Kina. ua hoʻolauna i nā laina hana kiʻekiʻe a me nā huahana mai nā ʻāina ʻē, kahi e pono ai ka nui o nā polyurethane adhesives i lawe ʻia mai e kākoʻo iā lākou, no laila e hoʻoikaika ana i ka hoʻomohala ʻana o nā polyurethane adhesives i loko o nā ʻāpana noiʻi kūloko. o ka ulu wikiwiki. I nā makahiki i hala iho nei, ke emi nei ke kumukūʻai o ka polyurethane glue, a ʻo ke kumukūʻai o ka polyurethane glue i kēia manawa he 20% wale nō ke kiʻekiʻe ma mua o ka chloroprene glue, e hāʻawi ana i nā kūlana no ka polyurethane glue e noho i ka mākeke chloroprene glue.
Ka manawa hoʻouna: Mar-03-2021