Kub yaj nplaum nplaum yog ib hom siab polymer nplaum coated nyob rau hauv kub yaj lub xeev thiab bonded los ntawm txias hardening. Nws tsis siv cov kuab tshuaj hauv kev tsim khoom thiab daim ntawv thov, tsis muaj tshuaj lom, tsis muaj kuab lom, tsis muaj kuab lom rau ib puag ncig, lub npe hu ua "green adhesive", tshwj xeeb tshaj yog tsim rau kev ua haujlwm txuas ntxiv, tsis siv neeg high-speed ntau lawm kab. Kub yaj nplaum nplaum yog tsim los ntawm thermoplastic polymer, nws lub cev lub cev hloov pauv nrog qhov kub thiab txias hauv qee qhov kub, tab sis nws cov khoom siv tshuaj tsis hloov pauv.
Kub yaj siab rhiab nplaum nplaum (HMPSA) yog ib tug thermoplastic polymer raws li nplaum, ob qho tib si kub yaj thiab siab rhiab ob lub zog, nrog 100 feem pua cov ntsiab lus khoom, kev tiv thaiv ib puag ncig thiab tsis muaj tshuaj lom, muaj zog lub xeev ntawm chav tsev kub thiab viscosity, nyob rau hauv lub melting xeev. tuaj yeem coated, txias thiab kho tom qab siv cov ntiv tes me me tuaj yeem ua haujlwm sai, tab sis kuj tuaj yeem yooj yim rau stripped, Tsis txhob kis kab mob ntawm daim nplaum.
Tam sim no, kub yaj siab rhiab nplaum nplaum tau siv dav hauv kev tsim cov pawm, cov ntaub so ntswg huv, cov ntawv lo, plaster, cov khoom nplaum, cov ntaub nplaum kho mob, elastic pem teb, cov khau kis las, cov dej tsis muaj dej, cov ntaub ntawv sib xyaw, tsheb sab hauv thiab lwm yam.
Kub yaj siab rhiab nplaum nplaum feem ntau siv raw cov ntaub ntawv muaj pes tsawg leeg muaj plaub pawg: polymer (styrene block copolymer xws li SBS, SIS, SEBS, polyolefin, thiab lwm yam), nplaum (petroleum resin, rosin resin, thiab lwm yam), plasticizer (naphthenic roj. ), antioxidants, thiab plaub pawg ntawm raw cov ntaub ntawv muab faib ua ob peb pawg me me thiab pua pua ntawm cov khoom qauv.
Raws li cov qauv molecular ntawm SBS thiab SIS muaj unsaturated ob daim ntawv cog lus, lub polarity yog me me, ua rau muaj qhov tsis xws luag ntawm kev laus tsis kam, kub tsis kam, tensile zog thiab hardness nyob rau hauv kev npaj ntawm HMPSA siv SBS thiab SIS raws li matrix. Txhawm rau kov yeej nws qhov tsis txaus thiab nthuav dav nws cov ntawv thov, nws yuav tsum tau hloov kho. Cov kev hloov kho tseem ceeb suav nrog kev sib xyaw hloov pauv, hloov kho hydrogenation, hloov kho sulfonation, hloov kho epoxidation thiab kev hloov pauv sib xyaw.
Hom tshiab ntawm HMPSA suav nrog acrylate HMPSA, silicone HMPSA thiab amorphous polyolefin HMPSA, thiab lwm yam.
(1) Acrylate kub yaj siab rhiab nplaum nplaum feem ntau yog ua los ntawm cov khoom siv polymerization. Cov monomers siv los npaj hom kub yaj siab rhiab nplaum nplaum yog mos monomer, nyuaj monomer thiab ua haujlwm monomer. Mos monomers feem ntau suav nrog butyl acrylate thiab 2-ethylhexyl acrylate, uas nws txoj haujlwm yog los tsim lub siab rhiab polymer nrog cov iav hloov pauv kub; Cov monomers nyuaj feem ntau yog methyl methacrylate, yas acetate, thiab lwm yam, uas nws txoj haujlwm yog copolymerize nrog mos monomers los txhim kho lub copolymer lub zog cohesion thiab kev pabcuam kub; Kev ua haujlwm ntawm kev ua haujlwm monomers yog tsuas yog los txhim kho lub zog cohesion thiab adhesion ntawm lub siab rhiab nplaum nplaum, xws li acrylic acid, acrylamide, maleic anhydride thiab lwm yam.
(2) Cov khoom tseem ceeb ntawm silicone kub yaj lub siab-rhiab nplaum nplaum yog silicone resin, kua silicone roj hmab los yog polycondensation ntawm ob qho tib si, thiab ib feem ntawm cov additives. Cov nplaum nplaum zoo li no muaj cov khoom siv hluav taws xob zoo heev, ua haujlwm kub, tiv taus txias thiab tshuaj lom neeg, thiab feem ntau yog siv rau hauv qhov chaw xav tau.
(3) Amorphous polyolefin kub yaj lub siab-rhiab nplaum nplaum yog qhov tseem ceeb ntawm homopolymer lossis copolymer nrog cov txheeb ze qis molecular hnyav tsim los ntawm kev kub siab copolymerization ntawm propylene lossis propylene nrog ethylene, butene thiab hexene. HMPSA npaj los ntawm amorphous polyolefin tsis tsuas yog tus nqi qis, me me melting viscosity thiab siab softening point, tab sis kuj muaj cua sov thiab txias tsis kam, ntev cia lub sij hawm thiab zoo adhesion rau ntawv, ntoo, hlau, polyethylene thiab polypropylene.
Viscosity, soften point, tsw, xim, Tack, Peel, Shear, hnyav kuj, tsis tshua muaj kub thiab kub tsis kam yog cov kev tsis zoo rau kev ntsuas kub-melt press-sensitive nplaum.
Kub-melt siab-rhiab nplaum nplaum thawj zaug tshwm sim nyob rau hauv 1970s, zus tau tej cov poj niam cov ntaub so ntswg nrog kub-melt siab-rhiab nplaum nplaum (siv Nyiv Rayon SBS) tej zaum yuav yog lub ntxov kub-melt siab-rhiab nplaum cov khoom nyob rau hauv Tuam Tshoj. Tuam Tshoj yog lub ntiaj teb loj tshaj plaws kub yaj siab rhiab nplaum nplaum ntau lawm thiab muag. Ntau tshaj 60 feem pua ntawm kev ua lag luam feem ntau yog nyob hauv Eisai teb.
