Polyurethane adhesive molecular saw muaj carbamate pawg (-NHCOO-) lossis isocyanate pawg (-NCO), muab faib ua polyisocyanate thiab polyurethane ob pawg.Polyurethane nplaum, los ntawm cov tshuaj tiv thaiv ntawm pawg isocyanate hauv lub cev thiab cov khoom uas muaj cov nquag hydrogen sab hauv lossis sab nraud. , tsim cov pab pawg polyurethane los yog polyurea, yog li txhawm rau txhim kho lub zog ntawm lub cev thiab ua tiav lub hom phiaj ntawm kev sib txuas.
Adhesives feem ntau yog nplaum, nrog rau ntau yam curing agent, plasticizer, fillers, solvents, preservatives, stabilizers thiab coupling agents thiab lwm yam additives npaj.Nyob rau hauv xyoo tas los no, nrog rau kev txhim kho sai ntawm qib ntawm cov ntaub ntawv kev loj hlob, ntau yam adhesives nrog muaj zog applicability tuaj. tawm ib tug tom qab lwm, uas zoo heev enriched lub lag luam nplaum.
1. Txoj kev loj hlob
Polyurethane nplaum yog ib hom ntawm nruab nrab thiab qib siab nplaum nplaum, uas muaj qhov ua tau zoo heev, kev cuam tshuam tsis zoo, tshuaj lom neeg tsis kam, hnav tsis kam, thiab qhov tseem ceeb tshaj plaws yog nws qhov kub thiab txias tsis kam. polyurethane adhesives uas tsim nyog rau kev sib txuas ntawm ntau yam ntaub ntawv thiab kev siv sib txawv.Polyurethane nplaum yog thawj zaug siv nyob rau hauv cov tub rog teb nyob rau hauv 1947. Los ntawm Bayer tuam txhab, triphenyl methane triisocyanate tau ntse siv rau kev sib txuas ntawm cov hlau thiab roj hmab, thiab siv nyob rau hauv txoj kev khiav. ntawm lub tank, uas nteg ib lub hauv paus rau polyurethane nplaum kev lag luam.Nyiv qhia German thiab American technology nyob rau hauv 1954, pib tsim polyurethane adhesives nyob rau hauv 1966, thiab ntse tsim dej-raws li vinyl polyurethane adhesives, uas tau muab tso rau hauv industrial ntau lawm nyob rau hauv 1981. Tam sim no, kev tshawb fawb thiab tsim cov polyurethane nplaum nyob rau hauv Nyiv yog heev nquag, thiab ua ke nrog rau lub tebchaws United States thiab Western Europe, Nyiv tau los ua ib tug loj tsim thiab exporter ntawm polyurethane. Txij li thaum 1980s, polyurethane adhesives tau tsim sai heev, thiab tam sim no lawv tau ua. ib tug ntau yam thiab dav siv kev lag luam.
Xyoo 1956, Tuam Tshoj tau tsim thiab tsim triphenyl methane triisocyanate (Lekner adhesive), thiab sai sai tsim toluene diisocyanate (TDI) thiab ob lub ntsiab lus hnyav-raws li polyurethane nplaum, uas tseem yog ntau hom polyurethane nplaum nyob hauv Suav teb. tau nthuav tawm ntau cov kab ntau lawm thiab cov khoom lag luam los ntawm txawv teb chaws, uas yuav tsum muaj ntau cov khoom siv polyurethane tuaj yeem los txhawb lawv, yog li txhawb txoj kev loj hlob ntawm polyurethane nplaum nyob rau hauv domestic kev tshawb fawb units.Tshwj xeeb tshaj yog tom qab 1986, lub polyurethane kev lag luam nyob rau hauv Tuam Tshoj tau nkag mus rau ib lub sij hawm. ntawm kev loj hlob sai.Nyob rau hauv xyoo tas los no, tus nqi ntawm polyurethane kua nplaum yog txo, thiab tam sim no tus nqi ntawm polyurethane kua nplaum tsuas yog hais txog 20% siab tshaj li chloroprene kua nplaum, uas muab cov kev mob rau polyurethane kua nplaum los tuav lub chloroprene kua nplaum ua lag luam.
Post lub sij hawm: Mar-03-2021