Polyisocyanurate (PIR) imhando yepurasitiki inogadziriswa nethermosetting, ine mashandiro ari nani pane foam yechinyakare yepolyurethane (PU). Polyurethanes inoumbwa nekuita kweisocyanates dzakadai sediphenylmethane diisocyanate, kana MDI, nepolyols, nepo PIR ine maitiro akaomarara umo isocyanate isingangoiti chete nepolyol, asiwo inogadzirisa. Maitiro aya anoumba chimiro cherin'i chakasiyana mupolymer matrix, zvichipa PIR simba rakanaka rekudzivirira moto, hunhu hwekupisa kupisa uye simba remakanika. Mabhenefiti aya anoita kuti PIR ive sarudzo yakakura yekushandiswa kwakasiyana-siyana, kunyanya mukuvaka, kuputira uye kugadzira maindasitiri.
Chii chinonzi Polyisocyanurate (PIR)?
Polyisocyanurate (PIR) inowanzotsanangurwa semhando yepamusoro yepolyurethane nekuda kwemakemikari ayo uye hunhu hwayo hwakasiyana hunogadzirwa mukugadzirwa kwayo. Mukugadzirwa kwePIR, isocyanate yakawandisa inoshandiswa uye chinhu chakakosha chinounzwa kukurudzira trimerization yeisocyanate. Chigadzirwa chinobuda ifuro rakabatana zvakasimba uye rakasimba kwazvo. Trimerization yeisocyanates inogadzira mhete dzeisocyanurate, idzo dzinoita kuti PIR igare kwenguva refu uye moto usingaperi kana tichienzanisa nePU foams dzechinyakare.
Nekuda kwechimiro chayo chemasero akavharwa, PIR ine hunhu hwakanaka hwekudzivirira kupisa uye kufambisa kupisa kwakaderera, zvichiita kuti ive chinhu chinozivikanwa mukuvaka masisitimu ekudzivirira kupisa, mayuniti ekutonhodza, uye mamwe mashandisirwo anoda kudzivirira kupisa kwakasimba. Hunhu hwekudzivirira moto hwezvinhu zvinodzora moto zvakawedzerwa uye mhete dzeisocyanurate zvinoita kuti PIR ive sarudzo yakachengeteka pane polyurethane munzvimbo umo kudzivirira moto kwakakosha.
ZvinokonzeramuPIR Production
Kubudirira kwekugadzirwa kwepolyisocyanurate foam kunoenderana zvikuru nekuvapo kwezvinokonzera simba zvinodzora mashandiro ari pakati peMDI nepolyol uye zvinokurudzira trimerization yemapoka eisocyanate. Zvinokonzera simba zvakakosha mukudzora kumhanya kwemaitiro, kuona kuti furo rinokwira zvakaenzana, uye kuona hunhu hwekupedzisira hwefuro.
Mukuita kwePIR, mhando mbiri dze catalysts dzinowanzo shandiswa:
Zvishandiso zveGelling Catalysts:Ma catalyst aya anokurudzira kusangana pakati pe isocyanate ne polyol, zvichikonzera kuumbwa kwe urethane bonds dzinobatsira muchimiro che furo. Ma gelling catalysts anobatsira kudzora mashandiro e furo, akadai sekusimba uye kuchinjika.
Zvinokonzera Kugadziriswa Kwemafuta:Ma catalyst aya akagadzirirwa kukurudzira trimerization yemapoka e isocyanate, zvichitungamira pakuumbwa kwemaringi e isocyanurate. Ma catalyst e trimerization ndiwo anogadzira chimiro chakasimba chinosiyanisa PIR ne polyurethane foam. Kusarudzwa uye huwandu hwe trimerization catalyst zvine chekuita zvakananga nehunhu hwekupisa uye hunodzivirira moto hwechigadzirwa chekupedzisira che foam.
MXC-TMA: Chinhu Chinogadzirisa Kucheka Kwemafuta (Trimerization Catalyst) chePIR
MXC-TMA musanganiswa wemakemikari unokurudzira polyisocyanurate trimerization mukugadzirwa kwePIR foam. Iyi catalyst inovimbisa kukwira kwakafanana uye kwakadzorwa, izvo zvakakosha kuti uwane huwandu hwefuro hwakafanana uye hwemhando. Kushandisa MXC-TMA kunobvumira vagadziri kugadzira PIR foam uye kudzora nemazvo hunhu hwayo hwekupisa uye hwemakanika kuti ishandiswe mukuvaka mapaneru, mafiriji, uye mamwe mashandisirwo ekudzivirira kupisa.
MXC-TMA inopa nzvimbo yakagadzikana yekuita zvinhu, zvichikonzera kuvandudzwa kwekushanda zvakanaka kwekugadzira uye kushanda zvakanaka kwezvinhu. Nekudzora mwero we trimerization, inobatsira vagadziri kugadzira PIR foam inosangana nezvinodiwa zveindasitiri zvekudzivirira kupisa, kuchengetedzeka pamoto, uye kugara kwenguva refu.
Mhedziso
Mafuro ePolyisocyanurate (PIR) imhando yepamusoro yemhando yepamusoro inotsiva polyurethane uye ane mabhenefiti akawanda, anosanganisira kudzivirira moto zvakanyanya uye kudzivirira kupisa. Basa remafuro ekugadzirisa, kunyanya mafuro ekugadzirisa akadai seMXC-TMA, rinoita kuti mafuro ePIR emhando yepamusoro abudiswe. Mafuro aya haangobatsiri chete pakuita kwemakemikari anodiwa kuti pave nechimiro cheisocyanurate, asiwo anogonesa kudzora kwakaringana kwehunhu hwefuro, zvichiita kuti PIR ive sarudzo yakakura kune akasiyana mashandisirwo emaindasitiri nekuvaka.
Nguva yekutumira: Zvita-18-2024