ee

Polyurethane adhesives - yemberi nyeredzi yekunamatira

Polyurethane inonamatira mamorekuru ketani ine carbamate boka (-NHCOO-) kana isocyanate boka (-NCO), rakakamurwa kuita polyisocyanate uye polyurethane mapoka maviri. Polyurethane adhesives, kuburikidza nekuita kwemapoka eisocyanate muhurongwa uye zvinhu zvine hydrogen inoshanda mukati kana kunze kweiyo system. , gadzira mapoka e polyurethane kana polyurea, kuitira kuti uvandudze zvakanyanya simba rehurongwa uye uzadzise chinangwa chekubatana.

Adhesives anonyanya kunamatira, ane akasiyana ekurapa mumiririri, plasticizer, mafiringi, zvinonyorovesa, zvinodzivirira, zvinodzikamisa uye zvinobatanidza vamiririri uye zvimwe zvinowedzerwa zvakagadzirirwa.Mumakore achangopfuura, nekukasira kwekuvandudzika kwenzvimbo yekusimudzira zvinhu, zvakasiyana siyana zvekunamatira zvine kusimba kushanda kunze imwe pashure peimwe, izvo zvakapfumisa kwazvo musika wekunamatira.

1. Mamiriro ekuvandudza

Polyurethane inonamira ndeimwe yepakati uye yakakwira giredhi yekunamatira, iyo ine yakanakisa inochinjika, inokonzeresa kusagadzikana, kusagadzikana kwemakemikari, kupfeka kupfeka, uye inonyanya kukosha ndeye yakaderera tembiricha inodzivirira.Nokugadzirisa iyo mbishi zvinhu uye fomula, tinogona kugadzira akasiyana polyurethane adhesives akakodzera kubatana pakati pezvinhu zvakasiyana siyana uye mashandisirwo akasiyana siyana.Polyurethane yekunamatira yakatanga kushandiswa mumunda wemauto muna 1947. Nekambani yeBayer, triphenyl methane triisocyanate yakashandiswa zvinobudirira pakubatana kwesimbi nerabha, uye yakashandiswa panzira ye tangi, iyo yakaisa hwaro hwe polyurethane yekunamatira indasitiri. Japan rakaunza tekinoroji yeGerman neyeAmerican muna 1954, yakatanga kuburitsa polyurethane adhesives muna 1966, uye ikabudirira kugadzira mvura-based vinyl polyurethane adhesives, akaiswa mukugadzirwa kwemaindasitiri muna 1981. iripo, iko kutsvagurudza uye kugadzirwa kwe polyurethane zvinonamatira muJapan zvinoshingairira, uye pamwe neU nited States neWestern Europe, Japan rave mugadziri mukuru uye mutengesi we polyurethane.Since 1980, polyurethane adhesives yakawedzera nekukasira, uye ikozvino yave indasitiri dzakasiyana siyana uye dzinoshandiswa zvakanyanya.

Muna 1956, China yakatanga uye ikaburitsa triphenyl methane triisocyanate (Lekner adhesive), uye munguva pfupi yakaburitsa toluene diisocyanate (TDI) uye maviri-echinhu solvent-based polyurethane adhesive, iyo ichiri mhando yakakura kwazvo ye polyurethane yekunamatira muChina.Kubvira ipapo, China yave akaunza akawanda epamberi ekugadzira mitsara uye zvigadzirwa kubva kunze kwenyika, uko kunodiwa huwandu hwakawanda hwekunze polyurethane adhesives kuvatsigira, nekudaro kusimudzira kugadzirwa kwe polyurethane adhesives mudzimba dzekutsvagisa zvikamu. Kunyanya mushure ma1986, indasitiri ye polyurethane muChina yapinda nguva Yekukurumidza kukura.Mumakore achangopfuura, mutengo we polyurethane glue iri kuderera, uye iye zvino mutengo we polyurethane glue unongori ne20% chete kupfuura iyo yekloroprene glue, iyo inopa mamiriro eiyo polyurethane glue kutora chloroprene glue musika.


Post nguva: Mar-03-2021