Polyurethane adhesive molecular chain ine carbamate boka (-NHCOO-) kana isocyanate boka (-NCO), rakakamurwa kuva polyisocyanate uye polyurethane mapoka maviri.Polyurethane adhesives, kuburikidza nekuita kwemapoka e-isocyanate muhurongwa uye zvinhu zvine hydrogen inoshanda mukati kana kunze kwehurongwa. , gadzira mapoka e-polyurethane kana polyurea, kuitira kuti ivandudze zvikuru simba regadziriro uye kuzadzisa chinangwa chekubatanidza.
Adhesives anonyanya kunamira, ane akasiyana anorapa ejenti, plasticizer, fillers, solvents, preservatives, stabilizers uye coupling agents uye zvimwe zvinowedzera zvakagadzirirwa. Mumakore achangopfuura, nekukurumidza kuvandudzwa kwedanho rekuvandudza zvinhu, zvakasiyana-siyana zvekunamira zvine simba zvinoshanda zvakauya. kunze imwe mushure meimwe, izvo zvakapfumisa zvakanyanya musika wekunamatira.
1. Mamiriro ebudiriro
Polyurethane adhesive imhando yepakati uye yepamusoro giredhi adhesive, iyo ine yakanakisa kuchinjika, kukanganisa kupikisa, makemikari kuramba, kusapfeka, uye chinonyanya kukosha kuderera kwayo kwekushisa. Nekugadzirisa iyo mbishi uye formula, tinogona kugadzira akasiyana polyurethane adhesives akakodzera kusungirirwa pakati pezvinhu zvakasiyana-siyana uye kushandiswa kwakasiyana-siyana.Polyurethane adhesive yakatanga kushandiswa munhandare yemauto muna 1947. Nekambani yeBayer, triphenyl methane triisocyanate yakashandiswa zvakabudirira pakubatanidzwa kwesimbi nerabha, uye yakashandiswa panjanji. yetangi, iyo yakateya nheyo yeindasitiri yekunamira yepolyurethane. Japan yakaunza tekinoroji yeGerman neAmerica muna 1954, yakatanga kugadzira zvinonamira zvepolyurethane muna 1966, uye zvakabudirira kugadzira mvura-based vinyl polyurethane adhesives, iyo yakaiswa mukugadzirwa kwemaindasitiri muna 1981. ikozvino, tsvakurudzo uye kugadzirwa kwepolyurethane adhesives muJapan inoshanda zvikuru, uye pamwe chete neUnited States neWestern Europe, Japan yakave mugadziri mukuru uye mutengesi wepolyurethane. indasitiri yakasiyana-siyana uye inoshandiswa zvakanyanya.
Muna 1956, China yakagadzira uye yakagadzira triphenyl methane triisocyanate (Lekner adhesive), uye munguva pfupi yakagadzira toluene diisocyanate (TDI) uye maviri-component-based polyurethane adhesive, iyo ichiri mhando huru yepolyurethane adhesive kuChina. yakaunza mitsetse yakawanda yekugadzirwa kwepamusoro uye zvigadzirwa kubva kunze kwenyika, umo nhamba huru yezvinonamira zve polyurethane zvinodiwa kuti zvivatsigire, nekudaro kusimudzira kugadzirwa kwezvinonamira zvepolyurethane muzvikamu zvekutsvagisa zvemudzimba.Kunyanya mushure me1986, indasitiri yepolyurethane muChina yapinda munguva. Mumakore achangopfuura, mutengo wepolyurethane glue uri kudzikira, uye mutengo wazvino weglue guruu unongokwira ne20% chete kupfuura wechloroprene glue, izvo zvinopa mamiriro ekuti polyurethane glue igare pamusika wechloroprene glue.
Nguva yekutumira: Kurume-03-2021