{"id":6989,"date":"2024-05-29T05:51:26","date_gmt":"2024-05-29T05:51:26","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6989"},"modified":"2024-05-29T05:51:26","modified_gmt":"2024-05-29T05:51:26","slug":"analysis-of-the-development-status-of-polyurethane-adhesives","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/hu\/analysis-of-the-development-status-of-polyurethane-adhesives\/","title":{"rendered":"A poliuret\u00e1n ragaszt\u00f3k fejl\u0151d\u00e9si helyzet\u00e9nek elemz\u00e9se"},"content":{"rendered":"

A poliuret\u00e1n ragaszt\u00f3k fejl\u0151d\u00e9si helyzet\u00e9nek elemz\u00e9se<\/p>\n

Az elm\u00falt \u00e9vekben az anyagfejleszt\u00e9s szintj\u00e9nek gyors javul\u00e1s\u00e1val egym\u00e1s ut\u00e1n jelentek meg a k\u00fcl\u00f6nb\u00f6z\u0151, er\u0151sebben alkalmazhat\u00f3 ragaszt\u00f3k, amelyek nagym\u00e9rt\u00e9kben gazdag\u00edtj\u00e1k a ragaszt\u00f3piacot. A poliuret\u00e1n ragaszt\u00f3 egy k\u00f6zepes-magas min\u0151s\u00e9g\u0171 ragaszt\u00f3, amely kiv\u00e1l\u00f3 rugalmass\u00e1ggal, \u00fct\u00e9s\u00e1ll\u00f3s\u00e1ggal, vegyi ellen\u00e1ll\u00e1ssal, kop\u00e1s\u00e1ll\u00f3s\u00e1ggal \u00e9s ami a legfontosabb, alacsony h\u0151m\u00e9rs\u00e9kleti ellen\u00e1ll\u00e1ssal rendelkezik. A nyersanyagok \u00e9s a formul\u00e1k be\u00e1ll\u00edt\u00e1s\u00e1val sokf\u00e9le poliuret\u00e1n ragaszt\u00f3t lehet tervezni, amelyek alkalmasak a k\u00fcl\u00f6nb\u00f6z\u0151 anyagok k\u00f6z\u00f6tti ragaszt\u00e1sra \u00e9s k\u00fcl\u00f6nb\u00f6z\u0151 c\u00e9lokra.<\/p>\n

A poliuret\u00e1n ragaszt\u00f3kat el\u0151sz\u00f6r katonai ter\u00fcleten alkalmazt\u00e1k 1947-ben, amikor a Bayer sikeresen alkalmazta a trifenil-met\u00e1n-triizocian\u00e1tot a f\u00e9m \u00e9s gumi ragaszt\u00e1s\u00e1ra, amelyet tankok l\u00e1nctalpain haszn\u00e1ltak, megalapozva ezzel a poliuret\u00e1n ragaszt\u00f3ipar alapjait. Jap\u00e1n 1954-ben, a n\u00e9met \u00e9s amerikai technol\u00f3gia bevezet\u00e9se, a poliuret\u00e1n anyagok gy\u00e1rt\u00e1sa 1960-ban, a poliuret\u00e1n ragaszt\u00f3k gy\u00e1rt\u00e1sa 1966-ban kezd\u0151d\u00f6tt, a sikeres vinil-poliuret\u00e1n v\u00edzb\u00e1zis\u00fa ragaszt\u00f3k kifejleszt\u00e9se, \u00e9s 1981-ben az ipari termel\u00e9sbe.<\/p>\n

1956-ban K\u00edna kifejlesztett \u00e9s el\u0151\u00e1ll\u00edtott trifenil-met\u00e1n-triizocian\u00e1tot (Lechner-ragaszt\u00f3), \u00e9s hamarosan toluol-diizocian\u00e1tot (TDI), k\u00e9tkomponens\u0171 old\u00f3szer alap\u00fa poliuret\u00e1n ragaszt\u00f3t, amely m\u00e9g mindig a legnagyobb termel\u00e9s\u0171 poliuret\u00e1n ragaszt\u00f3 K\u00edn\u00e1ban. Ezt k\u00f6vet\u0151en K\u00edna egym\u00e1s ut\u00e1n sz\u00e1mos fejlett gy\u00e1rt\u00f3sor \u00e9s term\u00e9k k\u00fclf\u00f6ldr\u0151l t\u00f6rt\u00e9n\u0151 bevezet\u00e9se k\u00f6vetkezett be, ami nagysz\u00e1m\u00fa import\u00e1lt poliuret\u00e1n ragaszt\u00f3t \u00e9s azok megfelel\u0151j\u00e9t ig\u00e9nyelte, \u00edgy el\u0151seg\u00edtve a hazai kutat\u00f3egys\u00e9gek sz\u00e1m\u00e1ra a poliuret\u00e1n ragaszt\u00f3k fejleszt\u00e9s\u00e9nek felgyors\u00edt\u00e1s\u00e1t. K\u00fcl\u00f6n\u00f6sen 1986 ut\u00e1n a k\u00ednai poliuret\u00e1nipar a gyors fejl\u0151d\u00e9s id\u0151szak\u00e1ba l\u00e9pett. Hossz\u00fa ideig a poliuret\u00e1n ragaszt\u00f3 \u00e1ra K\u00edn\u00e1ban t\u00fal magas, \u00e9s hossz\u00fa ideig a poliuret\u00e1n ragaszt\u00f3 \u00e1ra a neopr\u00e9n ragaszt\u00f3 1-2-szerese. Az ut\u00f3bbi \u00e9vekben a poliuret\u00e1n ragaszt\u00f3 \u00e1ra cs\u00f6kken, \u00e9s jelenleg a poliuret\u00e1n ragaszt\u00f3 \u00e1ra csak k\u00f6r\u00fclbel\u00fcl 20%-tel magasabb, mint a neopr\u00e9n ragaszt\u00f3\u00e9, ami biztos\u00edtja a felt\u00e9teleket a poliuret\u00e1n ragaszt\u00f3 sz\u00e1m\u00e1ra, hogy elfoglalja a neopr\u00e9n ragaszt\u00f3 piac\u00e1t.
\nA poliuret\u00e1n ragaszt\u00f3 el\u0151\u00e1ll\u00edt\u00e1si m\u00f3dszerei k\u00f6z\u00e9 tartozik az old\u00e1sos m\u00f3dszer \u00e9s a szil\u00e1rd gyantaold\u00e1si m\u00f3dszer. Jelenleg t\u00f6bb mint sz\u00e1z v\u00e1llalkoz\u00e1s gy\u00e1rt poliuret\u00e1n ragaszt\u00f3t l\u00e1bbelikhez sz\u00e1razf\u00f6ldi K\u00edn\u00e1ban, amelyek k\u00f6z\u00f6tt t\u00f6bb mint h\u00fasz nagyv\u00e1llalat van, mint p\u00e9ld\u00e1ul a Nanguang \u00e9s a Baili, amelyek termel\u00e9si kapacit\u00e1sa meghaladja a 10 000 tonn\u00e1t\/\u00e9v, \u00e9s alapvet\u0151en mindegyik\u00fck a Spanyolorsz\u00e1gb\u00f3l, N\u00e9metorsz\u00e1gb\u00f3l, az Egyes\u00fclt \u00c1llamokb\u00f3l \u00e9s Tajvanr\u00f3l import\u00e1lt gyant\u00e1t alkalmazza a poliuret\u00e1n ragaszt\u00f3 old\u00e1s\u00e1ra \u00e9s gy\u00e1rt\u00e1s\u00e1ra. Tekintettel a gy\u00e1rt\u00f3k nagy sz\u00e1m\u00e1ra, a verseny egyre intenz\u00edvebb\u00e9 v\u00e1lik, annak \u00e9rdek\u00e9ben, hogy technikai \u00e9s \u00e1rel\u0151ny\u00f6kkel rendelkezzenek, n\u00e9h\u00e1ny nagy ragaszt\u00f3gy\u00e1r elkezdte ki\u00e9p\u00edteni a poliuret\u00e1n ragaszt\u00f3eszk\u00f6z\u00f6k gy\u00e1rt\u00e1s\u00e1nak megold\u00e1si m\u00f3dszer\u00e9t, \u00edgy a poliuret\u00e1n ragaszt\u00f3 old\u00e1si m\u00f3dszerrel t\u00f6rt\u00e9n\u0151 termel\u00e9s\u00e9nek ar\u00e1nya cs\u00f6kken.
\nJelenleg az elterjedt poliuret\u00e1n ragaszt\u00f3 old\u00f3szer alap\u00fa. A neopr\u00e9n ragaszt\u00f3hoz hasonl\u00f3an probl\u00e9m\u00e1t jelent a toxicit\u00e1s \u00e9s a k\u00f6rnyezetszennyez\u00e9s. Az elm\u00falt \u00e9vekben nem l\u00e9tezik \"h\u00e1rom benzol\" poliuret\u00e1n gumi, azaz a ketonok, \u00e9szterek \u00e9s m\u00e1s kevert old\u00f3szerek haszn\u00e1lata, a toxicit\u00e1s cs\u00f6kken, de a probl\u00e9ma nem old\u00f3dott meg alapvet\u0151en.
\nA reakci\u00f3\u00f6sszet\u00e9tel szerinti poliuret\u00e1n ragaszt\u00f3 poliizocian\u00e1t ragaszt\u00f3ra, izocian\u00e1t b\u00e1zist tartalmaz\u00f3 poliuret\u00e1n ragaszt\u00f3ra, hidroxil poliuret\u00e1n ragaszt\u00f3t tartalmaz\u00f3 poliuret\u00e1n ragaszt\u00f3ra \u00e9s poliuret\u00e1n gyanta ragaszt\u00f3ra oszthat\u00f3. Az oszt\u00e1lyoz\u00e1s felhaszn\u00e1l\u00e1sa \u00e9s jellemz\u0151i szerint \u00e1ltal\u00e1nos c\u00e9l\u00fa ragaszt\u00f3kra, \u00e9lelmiszer-csomagol\u00f3 ragaszt\u00f3kra, cip\u0151ragaszt\u00f3kra, pap\u00edr-m\u0171anyag kompozit ragaszt\u00f3kra, \u00e9p\u00edt\u0151ipari ragaszt\u00f3kra, szerkezeti ragaszt\u00f3kra, ultraalacsony h\u0151m\u00e9rs\u00e9klet\u0171 ragaszt\u00f3kra, hab t\u00edpus\u00fa ragaszt\u00f3kra, anaerob ragaszt\u00f3kra, vezet\u0151 ragaszt\u00f3kra, olvad\u00f3 ragaszt\u00f3kra, nyom\u00e1s\u00e9rz\u00e9keny ragaszt\u00f3kra, z\u00e1rt t\u00edpus\u00fa ragaszt\u00f3kra, v\u00edzalap\u00fa ragaszt\u00f3kra \u00e9s t\u00f6m\u00edt\u0151 ragaszt\u00f3kra stb. oszthat\u00f3.<\/p>\n

\"A poliuret\u00e1n ragaszt\u00f3kat sz\u00e9les k\u00f6rben haszn\u00e1lj\u00e1k a cip\u0151anyagok gy\u00e1rt\u00e1si folyamat\u00e1ban, teh\u00e1t melyek a cip\u0151kh\u00f6z haszn\u00e1lt poliuret\u00e1n ragaszt\u00f3k jellemz\u0151i? \u00c9s milyen t\u00e9nyez\u0151k befoly\u00e1solj\u00e1k a ragaszt\u00f3 teljes\u00edtm\u00e9ny\u00e9t?'
\nA cip\u0151kh\u00f6z val\u00f3 poliuret\u00e1n ragaszt\u00f3, m\u00e1s poliuret\u00e1n ragaszt\u00f3khoz hasonl\u00f3an, kiv\u00e1l\u00f3 alacsony h\u0151m\u00e9rs\u00e9kleti teljes\u00edtm\u00e9nnyel, alacsony kikem\u00e9nyed\u00e9si h\u0151m\u00e9rs\u00e9klettel, kiv\u00e1l\u00f3 rugalmass\u00e1ggal, \u00fct\u00e9s\u00e1ll\u00f3s\u00e1ggal, nedves\u00edthet\u0151s\u00e9ggel \u00e9s sz\u00e1mos anyaghoz val\u00f3 tapad\u00e1ssal rendelkezik. Ez\u00e9rt \u00e1ltal\u00e1ban olyan alkalmaz\u00e1sokban haszn\u00e1lj\u00e1k, amelyek norm\u00e1l h\u0151m\u00e9rs\u00e9kletet, gyors kikem\u00e9nyed\u00e9st \u00e9s rugalmass\u00e1got ig\u00e9nyelnek, \u00e9s k\u00fcl\u00f6n\u00f6sen alkalmas k\u00fcl\u00f6nb\u00f6z\u0151 t\u00e1gul\u00e1si egy\u00fctthat\u00f3j\u00fa, elt\u00e9r\u0151 anyagok ragaszt\u00e1s\u00e1ra.
\nA cip\u0151k\u00e9sz\u00edt\u00e9shez haszn\u00e1lt ragaszt\u00f3 teljes\u00edtm\u00e9nyk\u00f6vetelm\u00e9nyei a k\u00fcl\u00f6nb\u00f6z\u0151 anyagokt\u00f3l, cip\u0151t\u00edpusokt\u00f3l \u00e9s ragaszt\u00e1si elj\u00e1r\u00e1sokt\u00f3l f\u00fcgg\u0151en v\u00e1ltoznak, de \u00f6sszess\u00e9g\u00e9ben a cip\u0151kh\u00f6z haszn\u00e1lt ragaszt\u00f3nak a k\u00f6vetkez\u0151 tulajdons\u00e1gokkal kell rendelkeznie:
\nMegfelel\u0151 tapad\u00e1si szil\u00e1rds\u00e1g heterog\u00e9n anyagok \u00e9s k\u00fcl\u00f6nb\u00f6z\u0151 krist\u00e1lyos anyagok eset\u00e9n, valamint nagy leh\u00faz\u00e1si szil\u00e1rds\u00e1g;
\nNagy kezdeti tapad\u00e1s a cip\u0151gy\u00e1rt\u00f3 sor k\u00f6vetelm\u00e9nyeihez val\u00f3 alkalmazkod\u00e1shoz; k\u00fcl\u00f6n\u00f6sen nagy h\u00e1ml\u00e1si szil\u00e1rds\u00e1g;
\nA m\u00e9retez\u00e9si folyamat egyszer\u0171, k\u00f6nnyen kezelhet\u0151, a haszn\u00e1lati id\u0151 a cip\u0151gy\u00e1rt\u00f3 vonal ig\u00e9nyeihez igaz\u00edthat\u00f3;
\nM\u00e9rs\u00e9kelt h\u0151\u00e1ll\u00f3s\u00e1ggal, megfelel\u0151 v\u00edz\u00e1ll\u00f3s\u00e1ggal \u00e9s ragaszt\u00e1si tart\u00f3ss\u00e1ggal rendelkezik.
\nA cip\u0151k poliuret\u00e1n ragaszt\u00f3ja megfelel a fenti k\u00f6vetelm\u00e9nyeknek, \u00e9s kezdeti tapad\u00e1sa rosszabb, mint a neopr\u00e9n ragaszt\u00f3\u00e9, de jelenleg a hazai \u00e9s k\u00fclf\u00f6ldi kutat\u00f3k m\u00f3dszereket terjesztettek el\u0151 a kezdeti tapad\u00e1s jav\u00edt\u00e1s\u00e1ra, amelyet alapvet\u0151en megoldottak. A l\u00e1gy \u00e9s m\u00f3dos\u00edtott PVC az ut\u00f3bbi \u00e9vekben a k\u00e9miai cip\u0151k egyik f\u0151 anyaga, a poliuret\u00e1n ragaszt\u00f3nak az ilyen anyagok ragaszt\u00e1s\u00e1nak funkci\u00f3ja van. Nemcsak a neopr\u00e9n ragaszt\u00f3 sz\u00e9les k\u00f6r\u0171 alkalmazhat\u00f3s\u00e1g\u00e1val, valamint kiv\u00e1l\u00f3 rugalmass\u00e1g\u00e1val, l\u00e1gys\u00e1g\u00e1val \u00e9s hajl\u00edt\u00e1si ellen\u00e1ll\u00e1s\u00e1val rendelkezik, \u00e9s az ut\u00f3bbin\u00e1l jobb v\u00edz\u00e1ll\u00f3s\u00e1ggal, zs\u00edr\u00e1ll\u00f3s\u00e1ggal \u00e9s h\u0151\u00e1ll\u00f3s\u00e1ggal rendelkezik.
\nEzen t\u00falmen\u0151en a poliuret\u00e1n ragaszt\u00f3 k\u00e9pes olyan cip\u0151k\u00e9sz\u00edt\u0151 anyagok ragaszt\u00e1s\u00e1ra, amelyek az \u00e1ltal\u00e1nos ragaszt\u00f3k sz\u00e1m\u00e1ra nehezek, mint p\u00e9ld\u00e1ul a mikrocell\u00e1s poliuret\u00e1n elasztomerek, habok \u00e9s szintetikus b\u0151r\u00f6k kiv\u00e1l\u00f3 kop\u00e1s\u00e1ll\u00f3s\u00e1ggal, valamint a kiv\u00e1l\u00f3 olaj- \u00e9s benzin\u00e1ll\u00f3s\u00e1ggal rendelkez\u0151 ciano gumik \u00e9s h\u0151re l\u00e1gyul\u00f3 gumik (SBR, SBS, SIS stb.). Ezeket az anyagokat sz\u00e9les k\u00f6rben haszn\u00e1lj\u00e1k talpanyagk\u00e9nt a cip\u0151gy\u00e1rt\u00f3 iparban, nagym\u00e9rt\u00e9kben k\u00e9pl\u00e9keny polivinil-klorid vagy l\u00e9legz\u0151 poliuret\u00e1n m\u0171b\u0151r fels\u0151r\u00e9szekkel, hogy sz\u00e9p, k\u00f6nny\u0171 \u00e9s k\u00e9nyelmes cip\u0151ket \u00e9s csizm\u00e1kat k\u00e9sz\u00edtsenek.
\nA cip\u0151k\u00e9sz\u00edt\u00e9s sor\u00e1n a ragaszt\u00f3 teljes\u00edtm\u00e9ny\u00e9t befoly\u00e1sol\u00f3 f\u0151 t\u00e9nyez\u0151k a k\u00f6vetkez\u0151k:
\nA poli\u00e9szterfajt\u00e1k hat\u00e1sa a ragaszt\u00f3 teljes\u00edtm\u00e9ny\u00e9re. Poliadipinsav oszt\u00e1ly\u00fa poliuret\u00e1n ragaszt\u00f3rendszer, a ragaszt\u00f3 krist\u00e1lyoss\u00e1ga, a megfelel\u0151 kezdeti tapad\u00e1s a k\u00f6vetkez\u0151 n\u00f6vekv\u0151 sorrendben: etil\u00e9nglikol < L, 4-but\u00e1ndiol < 1, 6-hex\u00e1ndiol p\u00e1ros sz\u00e1m\u00fa sz\u00e9natomos diol szintetiz\u00e1lt poliuret\u00e1n, a molekula hidrog\u00e9n-ell\u00e1t\u00f3 csoportjai (p\u00e9ld\u00e1ul NH-) \u00e9s elektron-ell\u00e1t\u00f3 csoportjai (p\u00e9ld\u00e1ul -C-O-) k\u00f6nnyebben megk\u00f6zel\u00edthet\u0151ek. K\u00f6nnyebben alakulhat ki t\u00f6bb hidrog\u00e9nk\u00f6t\u00e9s, \u00edgy a polimer molekulal\u00e1nc k\u00f6nnyebben krist\u00e1lyosodik. A 4-n\u00e9l kevesebb sz\u00e9natomot tartalmaz\u00f3 glikolok nem alkalmasak cip\u0151ragaszt\u00f3anyagk\u00e9nt val\u00f3 felhaszn\u00e1l\u00e1sra, mivel gyenge a kezdeti tapad\u00e1si szil\u00e1rds\u00e1guk. Tekintettel a nyersanyagok \u00e1rt\u00e9nyez\u0151j\u00e9re, \u00e1ltal\u00e1ban a poliadipinsav-L,4-but\u00e1ndiolt v\u00e1lasztj\u00e1k a cip\u0151kh\u00f6z haszn\u00e1lt poliuret\u00e1n ragaszt\u00f3 f\u0151 nyersanyagak\u00e9nt.
\nA poli\u00e9szter molekulat\u00f6mege a ragaszt\u00f3 teljes\u00edtm\u00e9ny\u00e9re. Molekulat\u00f6meg k\u00fcl\u00f6nb\u00f6z\u0151 poli\u00e9szter ragaszt\u00f3 k\u00e9sz\u00fclt ragaszt\u00f3 tulajdons\u00e1gai nagy hat\u00e1ssal van, min\u00e9l nagyobb a molekulat\u00f6meg a poli\u00e9szter, ann\u00e1l nagyobb a viszkozit\u00e1s a ragaszt\u00f3, de a poli\u00e9szter molekulat\u00f6meg t\u00fal magas a penetr\u00e1ci\u00f3 a ragaszt\u00f3 teljes\u00edtm\u00e9ny \u00e9s a ragaszt\u00e1si teljes\u00edtm\u00e9ny kedvez\u0151tlen, a kiv\u00e1laszt\u00e1s a megfelel\u0151 molekulat\u00f6meg a poli\u00e9szter sz\u00fcks\u00e9ges, hogy jav\u00edtsa a ragaszt\u00e1si szil\u00e1rds\u00e1g. \u00c1ltal\u00e1ban 2000-3000 molekulat\u00f6meg\u0171 poli\u00e9szter poliol (poliadipinsav-1,4-but\u00e1ndiol eset\u00e9ben).
\nA ragaszt\u00f3 molekulat\u00f6mege a ragaszt\u00f3 tulajdons\u00e1gaira. Amikor a ragaszt\u00f3 molekulat\u00f6mege el\u00e9ri a 100 000-et, a ragaszt\u00f3 ragaszt\u00f3szil\u00e1rds\u00e1ga a legmagasabb, \u00e9s a ragaszt\u00f3szil\u00e1rds\u00e1g nyilv\u00e1nval\u00f3an cs\u00f6kken, ha 90 000-n\u00e9l kisebb. Amikor a molekulat\u00f6meg 11-130 000, amikor a ragaszt\u00f3er\u0151 nem cs\u00f6kken sokat, de a ragaszt\u00f3 stabilit\u00e1sa gyenge.
\nAz izocian\u00e1t index a ragaszt\u00f3 molekulat\u00f6meg\u00e9re \u00e9s a t\u00e1rol\u00e1si izocian\u00e1t index R (azaz az NCO \/ OH mol\u00e1ris ar\u00e1ny) hat\u00e1sa a ragaszt\u00f3 molekulat\u00f6meg\u00e9re, a t\u00e1rol\u00e1si stabilit\u00e1sra k\u00f6zvetlen hat\u00e1ssal van. A vonalz\u00f3 \u00e9rt\u00e9ke kisebb, mint 0,8, a ragaszt\u00f3 molekulat\u00f6meg\u00e9re kis hat\u00e1ssal van; a vonalz\u00f3 \u00e9rt\u00e9ke 0,85-0,95, a ragaszt\u00f3 molekulat\u00f6mege bizonyos hat\u00e1ssal van; \u00e9s a 0,95-1,0 \u00e9rt\u00e9k, a ragaszt\u00f3 molekulat\u00f6mege nagyobb hat\u00e1ssal van. A ragaszt\u00f3 t\u00e1rol\u00e1si stabilit\u00e1sa szempontj\u00e1b\u00f3l a vonalz\u00f3 \u00e9rt\u00e9ke kisebb, mint 0,95, amikor a szintetikus ragaszt\u00f3, ak\u00e1r a ragaszt\u00f3 r\u00e9szecsk\u00e9i a ragaszt\u00f3, j\u00f3 t\u00e1rol\u00e1si stabilit\u00e1ssal rendelkeznek. A vonalz\u00f3 \u00e9rt\u00e9ke 0,95-1,0, amikor a szintetikus ragaszt\u00f3, a ragaszt\u00f3, mint a ragaszt\u00f3 r\u00e9szecsk\u00e9k t\u00e1rol\u00e1si stabilit\u00e1sa.
\nA szil\u00edcium-dioxid hat\u00e1sa a ragaszt\u00f3 tulajdons\u00e1gaira. A hidroxil-poliuret\u00e1n ragaszt\u00f3ban a ragaszt\u00f3 r\u00e9szecsk\u00e9inek felold\u00e1sa ut\u00e1n 1,6%-2,0% g\u00e1zf\u00e1zis\u00fa szil\u00edcium-dioxidot adunk hozz\u00e1, a ragaszt\u00f3 viszkozit\u00e1sa 300-400mPa-s-nal n\u00f6velhet\u0151, \u00e9s jav\u00edtja a poliuret\u00e1n ragaszt\u00f3 tapad\u00f3szil\u00e1rds\u00e1g\u00e1t \u00e9s a kezdeti tapad\u00e1st is.
\nA l\u00e1nchosszabb\u00edt\u00f3 hat\u00e1sa a ragaszt\u00f3 teljes\u00edtm\u00e9ny\u00e9re. A l\u00e1nchosszabb\u00edt\u00f3 hozz\u00e1ad\u00e1sa jav\u00edthatja az uret\u00e1nb\u00e1zis tartalm\u00e1t, n\u00f6velheti annak polimeriz\u00e1ci\u00f3s erej\u00e9t, polarit\u00e1s\u00e1t \u00e9s aktivit\u00e1s\u00e1t, \u00edgy a poliuret\u00e1n ragaszt\u00f3 k\u00e9pes fizikai adszorpci\u00f3t \u00e9s k\u00e9miai k\u00f6t\u00e9st kialak\u00edtani a ragasztott anyaggal, \u00e9s n\u00f6velheti a poliuret\u00e1n ragaszt\u00f3 kezdeti tapad\u00e1si szil\u00e1rds\u00e1g\u00e1t \u00e9s h\u0151\u00e1ll\u00f3 tulajdons\u00e1g\u00e1t.
\nA kem\u00e9ny\u00edt\u0151szer hat\u00e1sa a ragaszt\u00f3 teljes\u00edtm\u00e9ny\u00e9re. A kem\u00e9ny\u00edt\u0151szer \u00e1ltal\u00e1ban JQ-1 \u00e9s JQ-4 \u00e9s 7900, az \u00e1ltal\u00e1nos adal\u00e9kanyag mennyis\u00e9ge 3%-10%. Ha JQ-l-t haszn\u00e1lnak, a ragaszt\u00f3r\u00e9teg s\u00f6t\u00e9t sz\u00edn\u0171 \u00e9s v\u00f6r\u00f6snek t\u0171nik, szennyezi a fels\u0151t. A 79m haszn\u00e1lata valamivel jobb, de szint\u00e9n nem ide\u00e1lis JQ-4 el\u0151nyben r\u00e9szes\u00fcl.<\/p>","protected":false},"excerpt":{"rendered":"

A poliuret\u00e1n ragaszt\u00f3k fejl\u0151d\u00e9si helyzet\u00e9nek elemz\u00e9se Az elm\u00falt \u00e9vekben az anyagfejleszt\u00e9s szintj\u00e9nek gyors javul\u00e1s\u00e1val egym\u00e1s ut\u00e1n jelentek meg a k\u00fcl\u00f6nb\u00f6z\u0151, er\u0151sebb alkalmazhat\u00f3s\u00e1g\u00fa ragaszt\u00f3k, amelyek nagym\u00e9rt\u00e9kben gazdag\u00edtj\u00e1k a ragaszt\u00f3piacot. A poliuret\u00e1n ragaszt\u00f3 egy k\u00f6zepes-magas min\u0151s\u00e9g\u0171 ragaszt\u00f3, amely kiv\u00e1l\u00f3 rugalmass\u00e1ggal, \u00fct\u00e9s\u00e1ll\u00f3s\u00e1ggal, vegyi ellen\u00e1ll\u00e1ssal, kop\u00e1s\u00e1ll\u00f3s\u00e1ggal, [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-6989","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"\nAnalysis of the development status of polyurethane adhesives - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/hu\/analysis-of-the-development-status-of-polyurethane-adhesives\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Analysis of the development status of polyurethane adhesives - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"Analysis of the development status of polyurethane adhesives In recent years, with the rapid improvement of the level of material development, a variety of adhesives with stronger applicability have come out one after another, greatly enriching the adhesive market. 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