Hauv kev lag luam kev lag luam, ob qho kev xaiv ntau tshaj plaws thaum xaiv cov nplaum nplaum kub yog EVA (Ethylene-Vinyl Acetate Copolymer) thiab PUR (Polyurethane Reactive) cov nplaum kub yaj.
Txawm hais tias ob qho tib si yuav tsum tau yaj los ntawm cua sov rau daim ntawv nplaum, lawv muaj qhov sib txawv ntawm cov khoom siv tshuaj, kev txwv kev ua haujlwm, thiab cov xwm txheej siv tau. Kev xaiv cov nplaum tsis raug yuav ua rau kev ua haujlwm rov ua dua thiab tsis tsim nyog tus nqi nce, lossis ua rau muaj kev puas tsuaj loj ntawm cov khoom kawg hauv ib puag ncig hnyav.
Qhov txawv ntawm Core: Thermoplastic vs. Thermoset
Qhov sib txawv loj tshaj ntawm ob hom nplaum no nyob hauv lawv cov txheej txheem kho:
EVA yog "thermoplastic" nplaum: Nws kho tau tag nrho nyob ntawm qhov hloov pauv ntawm lub cev kub. Nws melts mus rau hauv cov kua thaum rhuab, thiab solidifies dua los tsim ib daim ntawv cog lus tom qab txias. Txij li qhov no tsuas yog hloov lub cev, cov txheej txheem rov qab los. Yog tias koj rov ua cov khoom sib txuas nrog EVA, cov nplaum yuav yaj dua, thiab daim ntawv cog lus yuav poob.
PUR yog "thermoset" nplaum: Nws kho tau muab faib ua ob theem. Thawj theem zoo ib yam li EVA, nws tsim thawj adhesion los ntawm lub cev txias. Hauv theem thib ob, nws dhau los ua cov tshuaj tiv thaiv kab mob - txuas cov tshuaj tiv thaiv (moisture-kho) nrog cov dej noo hauv huab cua thiab saum npoo ntawm substrate. Thaum cov tshuaj tiv thaiv ua tiav (uas feem ntau siv sijhawm 24-48 teev), lub zog thiab tawv network molecular qauv yuav tsim nyob rau hauv lub colloid. Cov txheej txheem no yog irreversible. Txawm hais tias PUR kho tau raug kub siab dua, nws yuav tsis yaj.
Daim ntawv teev cov Core Performance Comparison
Rau kev soj ntsuam sai thiab yooj yim, ntawm no yog qhov kev sib piv ntawm kev tsim khoom tseem ceeb ntawm EVA thiab PUR:
|
Performance / Indicator |
EVA (General Kub Melt Adhesive) |
PUR (Reactive Polyurethane Kub Melt Adhesive) |
|
Kho Mechanism |
Cov tshuaj tiv thaiv lub cev (kub txias) |
Cov tshuaj tiv thaiv lub cev (kub txias) + tshuaj tiv thaiv (moisture cross-txuas) |
|
Reversibility |
Reversible (yuav remelt thaum rhuab) |
Irreversible (tsis tuaj yeem rov qab tau tom qab kho tag nrho) |
|
Kub Kub Resistance |
Tsawg mus rau nruab nrab (feem ntau pib mos ntawm ib ncig ntawm 60℃- 75 degree) |
Siab heev (feem ntau tuaj yeem tiv taus 120℃- 150℃lossis siab dua) |
|
Tsawg kub tsis kam thiab dej tsis kam |
Nruab nrab (tej zaum yuav ua rau qhov txias txias, nruab nrab dej tsis kam) |
Zoo heev ( huab cua heev -resistant, dej- boiling -resistant thiab txias heev-resistant) |
|
Bonding Strength |
Standard qib (tsim rau cov khoom ntxeem tau xws li ntawv thiab ntoo) |
Qib cov qauv (tuaj yeem sib cog lus tsis yog- ntxeem tau yooj yim- rau - cov ntaub ntawv cog lus xws li hlau thiab yas) |
|
Yooj yim |
Feem ntau nruj lossis semi-rigid |
Tsis tshua muaj siab (elastic, tuaj yeem nthuav dav thiab cog lus nrog cov khoom siv hauv paus nrog kev hloov pauv kub) |
|
Glue Application Equipment Requirements |
Ordinary qhib kub yaj nplaum tshuab thiab kua nplaum lub tog raj kheej yog txaus |
Cov dej tshwj xeeb- cov khoom pov thawj thiab cov khoom sib cais (xws li lub tshuab ua kua nplaum platen) yuav tsum tau |
|
Khoom siv |
Tsawg |
Siab |
Hauv -Kev ntsuas qhov ua tau zoo
Temperature Resistance thiab Huab cua Resistance:
EVA: Nws yog rhiab heev rau qhov kub thiab txias. Yog tias cov rooj tog zaum ntug-banded nrog EVA yog muab tso rau hauv qhov siab - lub thawv kub lossis raug rau lub tsheb nyob rau hauv lub hnub ncaj qha rau lub caij ntuj sov, cov kab nplaum yuav ua rau mos thiab tawg. Hauv sub-zero ib puag ncig, EVA kuj tseem ua rau nkig thiab poob nws qhov adhesion. Lub curing ceev yog kiag li nyob ntawm qhov kub thiab txias dissipation tus nqi. Nws muaj qhov nrawm nrawm nrawm nrawm, tab sis yog tias cov kua nplaum siv tuab, qhov txias qeeb ntawm cov txheej sib sib zog nqus yuav ncua kev sib txuas thiab ua kom zoo. Lub sijhawm kho tag nrho yog qhov tsis zoo cuam tshuam nrog ambient kub.
PUR: Nws muaj huab cua tiv thaiv zoo heev. Tom qab ua tiav tus ntoo khaub lig-txuas kev kho, PUR tuaj yeem tiv taus qhov kub thiab txias (feem ntau tshaj 130 degree) thiab txias txias, tsis muaj kev puas tsuaj rau nws cov qauv kev ruaj ntseg. Nws tuaj yeem ua tiav thawj zaug kho thiab ua kom zoo tom qab txias rau chav sov. Tom qab ntawd nws maj mam ua tiav qhov sib sib zog nqus sib sib zog nqus- txuas los ntawm kev sib cuag cov dej noo hauv huab cua, thiab lub zog kawg yuav siv sijhawm 12 txog 72 teev kom ua tiav. Qhov kawg curing tsis cuam tshuam los ntawm cov kua nplaum txheej tuab.
Bonding Scope thiab Strength
EVA: Nws ua tau zoo tshaj plaws ntawm "porous substrates" xws li ntawv, cardboard thiab ntoo. Nws tsuas yog tso siab rau "txhim kho kev sib tshuam quab yuam" nkag mus rau hauv lub qhov hws ntawm cov khoom kom ua tiav adhesion. Yuav tsum muaj cov kua nplaum ntau dua los ua kom muaj zog sib txuas. Feem ntau, cov kua nplaum txheej rau ntug banding yog 150 ~ 250g / ㎡.
PUR: Nws belongs rau structural -qib nplaum. Ua tsaug rau nws cov tshuaj tiv thaiv cov yam ntxwv, nws tuaj yeem ruaj khov kho nyuaj heev - rau - cov txheej txheem tsis yog - cov ntaub ntawv ntxeem tau thiab cov khoom siv hluav taws xob tsawg (LSE), suav nrog hlau, iav, fiberglass, thiab yas xws li PVC thiab ABS. Nws tuaj yeem ua tiav lub zog siab dua nrog tsuas yog cov kua nplaum me me xwb. Feem ntau, cov kua nplaum txheej tsuas yog 80 ~ 120g / ㎡, thiab cov kua nplaum siv ib cheeb tsam tuaj yeem txo tau ze li ib nrab.
Kev txiav txim siab txog kev tsim khoom thiab khoom siv
Kev khiav hauj lwm ntawm EVA: Nws yog tus neeg siv heev - tus phooj ywg. Nws muaj lub neej txee ntev thiab tsis tas yuav tsum tau ntim thiab ya raws - pov thawj ntim. Cov neeg ua haujlwm tsuas yog yuav tsum tau nchuav cov kua nplaum pellets los yog cov nplaum nplaum rau hauv ib qho yooj yim qhib melting kua nplaum tank. Kev kaw thiab ntxuav kuj yog qhov yooj yim heev, thiab kev ntxuav tuaj yeem ua tiav los ntawm kev rov ua kom sov.
Kev khiav hauj lwm ntawm PUR: Nws yuav tsum muaj cov txheej txheem ua haujlwm nruj. Txij li thaum PUR yuav hnov mob nrog cov dej noo hauv huab cua, nws yuav tsum tau ntim rau hauv lub tshuab nqus tsev aluminium foil hnab los yog kaw cov kua nplaum tso tsheb hlau luam. Cov cuab yeej tshwj xeeb gluing nruab nrog kev tiv thaiv nitrogen lossis cua qhuav yuav tsum tau ua thaum lub sijhawm tsim khoom los tiv thaiv cov kua nplaum los ntawm cov tawv nqaij los yog kho hauv cov kua nplaum. Tus neeg saib xyuas tshwj xeeb kuj yuav tsum tau ntxuav lub cev.
Yuav xaiv li cas ntawm EVA thiab PUR?
Thaum twg xaiv EVA?
• Lub thawv ntim khoom: Rau cov xwm txheej uas tsis tas yuav muaj lub zog muaj zog thiab tsis muaj cua sov, xws li nthuav qhia lub thawv ntim thiab lub thawv tsim.
• Kev tsim cov ntoo ua haujlwm yooj yim: Rau kev sib tsoo ntawm cov rooj tog hauv tsev zoo tib yam thiab cov rooj tog zaum hauv chaw ua haujlwm uas yuav tsis raug rau qhov kub thiab txias ib puag ncig.
• qis-nqi, huab hwm coj- tsim cov khoom siv khoom siv: Kev tsim khoom tsom rau cov zis siab heev thiab kev tswj tus nqi kawg.
Thaum twg koj yuav tsum xaiv PUR?
• High -kawg ntoo thiab tag nrho- tsev customization : Ntug banding rau chav ua noj thiab chav dej, thiab tsim cov rooj ntoo sab nraum zoov. Hauv cov cheeb tsam no, cov dej tsis muaj dej thiab chav dej - pov thawj kev ua tau zoo yog qhov yuav tsum tau ua kom nruj, thiab PUR yog tib txoj kev xaiv.
• Automotive tha xim sab hauv: Adhesion ntawm lub ru tsev linings, qhov rooj vaj huam sib luag, dashboards thiab lwm yam khoom, uas yuav tsum tau tiv taus kub kub nyob rau hauv lub tsheb thaum raug tshav kub kub thaum lub caij ntuj sov.
• Textile thiab khau ntaub lamination: Lamination ntawm waterproof thiab breathable fabrics thiab ib leeg los ua ke, yuav tsum tau heev yooj yooj yim thiab washable nplaum txheej.
• Cov khoom siv hluav taws xob thiab khoom siv hauv tsev: Kev sib txuas ntawm lub vijtsam thiab lub plhaub sib dhos yuav tsum tau ua kom ruaj khov thiab nruj nreem sealing tiv thaiv ya raws thiab plua plav.
Yog xav paub ntxiv txog peb cov PUR kub yaj nplaum nplaum, thov mus saib peb cov khoom PUR kub yaj nplaum nplaum, lossis tiv tauj peb pab neeg ncaj qha rau kev xaiv cov lus qhia.
