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Izinto zokubambelela nge-polyurethane - inkwenkwezi yexesha elizayo yokuncamathelisa

I-polyurethane ye-adhesive chain chain iqukethe iqela le-carbamate (-NHCOO-) okanye iqela le-isocyanate (-NCO), lihlukaniswe libe yi-polyisocyanate kunye ne-polyurethane iindidi ezimbini.I-Polyurethane adhesives, ngokuphendula kwamaqela e-isocyanate kwinkqubo kunye nezinto eziqukethe i-hydrogen esebenzayo ngaphakathi okanye ngaphandle kwenkqubo Ukuvelisa amaqela e-polyurethane okanye i-polyurea, ukwenzela ukuphucula kakhulu amandla enkqubo kunye nokufezekisa injongo yokubopha.

Izinto zokuncamathela ikakhulu kukuncamathela, kunye nearhente yokunyanga eyahlukeneyo, iiplastizerizer, iifilitha, izinyibilikisi, izinto ezisigcinayo, izinto zokuqinisa kunye neearhente zokudibanisa kunye nezinye izongezo ezilungiselelwe Kwiminyaka yakutshanje, ngokuphuculwa okukhawulezileyo kwenqanaba lophuhliso lwezinto ezibonakalayo ngaphandle emva komnye, nto leyo ityebise kakhulu intengiso yokuncamathelisa.

1. Imeko yophuhliso

Ukuncamathela kwe-polyurethane luhlobo lokuncamathela kwinqanaba eliphakathi kunye neliphezulu, elinobhetyebhetye obugqwesileyo, ukumelana nefuthe, ukumelana neekhemikhali, ukunxiba ukumelana, kwaye okona kubaluleke kakhulu kukumelana nobushushu obuphantsi. I-polyurethane adhesives efanelekileyo ukudibanisa phakathi kwezinto ezahlukeneyo kunye nokusetyenziswa okwahlukileyo.I-polyurethane adhesive yaqala ukusetyenziswa kwicandelo lezomkhosi ngo-1947. Yinkampani yeBayer, i-triphenyl methane triisocyanate yasetyenziswa ngempumelelo ekudibaniseni isinyithi nerabha, kwaye yayisetyenziswa kumkhondo Itanki, eyabeka isiseko kwishishini lokuncamathelisa nge polyurethane. IJapan yazisa itekhnoloji yaseJamani neyaseMelika ngo-1954, yaqala ukuvelisa izinto zokuncamathelisa ngeplate ngo-1966, kwaye yaphumelela ngempumelelo i-vinyl polyurethane adhesives, eyathi yafakwa kwimveliso zorhwebo ngo-1981. Okwangoku, uphando kunye nemveliso yokuncamathelisa i-polyurethane eJapan iyasebenza kakhulu, kwaye ikunye ne-U Amazwe afanelekileyo kunye neNtshona Yurophu, iJapan iye yaba ngumlimi omkhulu kunye nomthumeli ngaphandle we-polyurethane. Ukususela ngo-1980, i-polyurethane adhesives iye yaphuhliswa ngokukhawuleza, kwaye ngoku ibe yindalo ebanzi kwaye isetyenziswa ngokubanzi.

Ngo-1956, i-China yaphuhlisa yaze yavelisa i-triphenyl methane triisocyanate (i-adapter ye-Lekner), kwaye kungekudala yavelisa i-toluene diisocyanate (TDI) kunye nezinto ezinamathelisi ezinto ezi-solvent-based polyurethane, eseseyona ntlobo inkulu yokuncamathelisa i-polyurethane e-China. yazisa imigca emininzi yemveliso kunye neemveliso ezivela phesheya, apho inani elikhulu lokuncamathelisa polyurethane kwamanye amazwe ziyafuneka ukuzixhasa, ngaloo ndlela kukhuthazwa ukuphuculwa kokuncamathela kwe-polyurethane kumacandelo ophando lwasekhaya ikakhulu emva ko-1986, icandelo le-polyurethane e-China lingene kwixesha Kwiminyaka yakutshanje, ixabiso le-polyurethane glue liyancipha, kwaye ixabiso langoku le-polyurethane glue liphela malunga ne-20% ngaphezulu kunaleyo ye-chloroprene glue, ebonelela ngemeko yeglu ye-polyurethane ukuba ingene kwimakethi ye-chloroprene glue.


Ixesha lokuposa: Mar-03-2021