Kugadzira tekinoroji - chii chinonzi polyurethane inopisa inonyungudika inonamatira.

Hot-melt adhesive ine mabhenefiti ekukurumidza kubatanidza kumhanya, kuchengetedzwa kwezvakatipoteredza, nyore bonding process, uye yakanaka bonding simba uye kuchinjika. Naizvozvo, hot-melt adhesive yebhuku isina waya inosunga, inopisa-inonyunguduka inonamira yekurongedza uye yekuisa chisimbiso, uye kugadzira shangu kwabuda. , textile hot melt adhesives nezvimwe zvigadzirwa, uye mumakore achangopfuura, pave nekuvandudzwa kutsva maererano nekusiyana uye kuita.

Mazhinji anopisa anonyunguduka anonamatira anogadzirwa ethylene-vinyl acetate (EVA), polyester, polyamide uye mamwe anopisa anonyunguduka resins. Nekuda kwekusasimba kwesimba uye elasticity yeEVA uye polyester inopisa inonyungudika inonamatira, haikwanise kumira yakawandisa kunze kwesimba. Pamusoro pezvo, nekuda kwekunyungudika kwepamusoro uye kuoma kwepolyamide inopisa-yakanyunguduka adhesives, inogumira mukushandiswa.

Thehot-melt polyurethane adhesive kunyanya inoshandisa iyo hydrogen bond mukuumbwa kuti ipinde mumuviri crosslinking, kuitira kuti polyurethane inopisa-yakanyunguduka inonamira ine yakanakisa elasticity uye simba. Iyo inopisa-yakanyunguduka polyurethane adhesive inorasikirwa nehydrogen bond mushure mekudziiswa, yova yakanyungudutswa viscous fluid, uye yodzokera kune yayo yepakutanga zvimiro mushure mekutonhodzwa. Nokudaro, polyurethane inopisa-yakanyunguduka yakanamatira ine maitiro ehutano hwepamusoro-soro, kupikisa kunyunguduka, kusagadzikana kwekusapfeka, nezvimwewo. Iine kuvimbika kwepamusoro mukushandiswa, makemikari akanaka uye kufanana kwemuviri, nzira iri nyore yekubatanidza (kuderedza mari yekugadzira), uye tsvina shoma (isina kushandiswa. Iyo yekunamatira inogona kuchengetwa kuti ishandiswe gare gare), hapana dambudziko rekusanganisa, uye inonamira inogona kuwana yakanakisa yemuviri zvivakwa. Mukuwedzera, nokuti iyo inopisa yakanyunguduka yakanamatira haishandisi organic solvents, nzvimbo yekugadzira haizosvibiswa, saka inogamuchirwa nevashandisi, uye inogona kushandiswa zvakanyanya mukubatanidzwa kwezvinhu zvakasiyana-siyana, kunyanya kusungirirwa kwemachira.

Polyurethane inopisa inonyungudutsa adhesives inogona kupatsanurwa muzvikamu zviviri: imwe ndeye thermoplastic polyurethane elastomer inopisa melt adhesives, uye imwe iri reactive polyurethane inopisa inonyungudutsa adhesives. Iyo yekupedzisira yakakamurwa kuva yakavharwa mhando uye mwando kurapa inopisa nyungudika mhando. Chisimbiso mhando, nekuti dissociation tembiricha ye sealant yakakwira se100℃ kana kupfuura, inokonzeresa mabhubhu mune yekunamatira layer, uye inongoshandiswa pakugadzirisa kurapwa. Iyo hunyoro-inoporesa inopisa-yakanyunguduka polyurethane adhesive inhengo imwe chete, isina kunyungudutsa, iyo inofambirana nemirairo yekuchengetedzwa kwezvakatipoteredza, iri nyore kushandisa, uye ine maitiro anofananidzwa neyakanyungudika-based-reactive type, saka ine yakanaka. budiriro tarisiro.

PURking PUR mwando kurapa reactive hot-melt adhesive ine mashandiro akanaka. Kubva mukati memotokari yemukati kusvika kune fenicha yekushongedza indasitiri, inogona kupa yakakwira-yakajairwa uye yepamusoro-mhandohot-melt adhesives. Tinotarisira kutaurirana nekushandira pamwe newe.