Substrate Compatibility rau Adhesive Screens: Peel Strength ntawm uPVC vs
Adhesive window screen systems cia siab rau acrylic siab-sensitive adhesives (PSA) uas nws qhov kev ua tau zoo yog tswj hwm los ntawm substrate nto zog, qib paug, thiab thermal expansion mismatch. Nyob rau hauv uPVC qhov rais screen cov khoom siv, tsis ua hauj lwm yog feem ntau adhesive interfacial sib cais es tsis txhob mesh rupture los yog daim kab xev tensile tsis ua hauj lwm.
Cov ntaub ntawv pov thawj qhia tau hais tias tev lub zog sib txawv ntawm uPVC, txhuas, thiab cov ntoo pleev xim tuaj yeem tshaj 2.5 × raws li cov qauv nplaum zoo tib yam.
1. Substrate Surface Energy cuam tshuam rau Acrylic Adhesive Bonds
Lub zog saum npoo ncaj qha txiav txim siab tus cwj pwm wetting thiab ntev -lub sij hawm daim ntawv cog lus ruaj khov ntawm cov nplaum qhov rai screen kab xev tshuab.
Yam Ntxim Saib Ntxim Saib Ntxim Ua
| Cov khoom siv substrate | Lub zog nto (mN / m) | Adhesion Wetting Level | Bond Stability |
|---|---|---|---|
| uPVC (Tsis muaj) | 38-42 mN / m | Nruab nrab | ruaj khov |
| uPVC (UV-hnub nyoog 5 xyoos) | 30-34 mN / m | Tsawg | Txo |
| Aluminium (Anodized) | 45-55 mN / m | Siab | ruaj khov |
| Painted Ntoo (Acrylic Txheej) | 32-48 mN / m | Nruab nrab -High | Hloov pauv |
| Ntoo Ntoo (Humidity 12-18%) | 40-60 mN / m | Siab | Tsis ruaj khov |
Engineering Observation
Acrylic PSA xav tau ntau dua lossis sib npaug ntawm 36 mN / m saum npoo lub zog rau kev ntub dej ruaj khov
Hauv qab 32 mN / m: nplaum tsis ua hauj lwm yuav nce 40-60%
uPVC kev laus txo qis zog vim yog plasticizer tsiv teb tsaws
Painted ntoo qhia inconsistent adhesion vim txheej porosity
Kev npaj nto yog qhov tseem ceeb hauv velcro screen mesh Hoobkas kev sib raug zoo.
2. Peel Adhesion (N / 25mm) Cov txiaj ntsig kuaj ntawm uPVC, Aluminium, thiab xim ntoo
Peel lub zog yog ntsuas ntawm 180℃tev lub kaum sab xis nyob rau hauv kev tswj cov chaw kuaj mob.
Test Parameters
Adhesive hom: Acrylic siab-sensitive nplaum
Test ceev: 300 mm / min
Kub: 23 ° ± 2 ° C
Humidity: 50% ± 5% RH
Peel Strength sib piv
| Substrate | Pib Peel Strength (N / 25mm) | Tom qab 7 Hnub | Tom qab Thermal Cycling (-20℃txog 70 degree) |
| uPVC (New) | 12-15 N / 25mm | 11–14 N | 9–12 N |
| uPVC (UV{0}} Aged) | 8-11 N / 25 hli | 7–10 N | 5–8 N |
| Aluminium (Anodized) | 15-18 N / 25mm | 14–17 N | 13–16 N |
| Painted Ntoo | 10-16 N / 25 hli | 8–14 N | 6–12 N |
Failure Mode Distribution
uPVC: interfacial adhesion poob (dominant)
Aluminium: cohesive adhesive shear tsis ua hauj lwm (tsis tshua muaj)
Ntoo: substrate fiber sib cais nyob rau hauv noo variation
Aluminium substrates muab qhov ruaj khov ntev tshaj -lub sij hawm adhesion profile rau nplaum qhov rais screen kab xev tshuab.
Nruab nrab -Txoj Kev Ua Haujlwm Kev Sib Koom Tes
Nyob rau theem no, kev xaiv cov nplaum yuav tsum ua raws li hom substrate, UV raug, thiab thermal cycling ntau yam hauv uPVC qhov rai screen cov khoom siv.
Rau OEM adhesive screen system nrhiav thiab cov khoom siv txheem:
► [nplaum qhov rais screen khoom siv]
Cov substrate kom raug-kev sib khi ua ke txo qhov tsis ua haujlwm ntawm thaj tsam txog li 45% hauv siab- qhov kub thiab txias hauv tsev.
3. Thermal Expansion Shear Stress Data in High-Sunlight Windows
Sib txawv thermal expansion ntawm substrate thiab nplaum txheej tsim shear stress ntawm lub interface.
Thermal Expansion Coefficients
| Khoom siv | Thermal Expansion (µm / m· degree) |
| uPVC | 50–80 |
| Aluminium | 22–24 |
| Ntoo (qhuav) | 3-5 (txoj kab uas hla) |
| Acrylic Adhesive | 150-200 (kev coj tus cwj pwm zoo) |
Shear Stress Behavior Nyob rau hauv tshav kub Load
| Qhov kub thiab txias | Shear Stress Level | Adhesion Stability |
| 20-35 ° C | Tsawg | ruaj khov |
| 35-55 degree | Nruab nrab | me ntsis nkag |
| 55-75 degree | Siab | Ntug nqa kev pheej hmoo |
| >75 degree | Tseem ceeb | Adhesive tsis ua hauj lwm yuav |
Pom cov teebmeem hauv teb
Sab qab teb -faus qhov rais qhia 20–35% sai dua cov nplaum degradation
uPVC nthuav dav ntau dua li txhuas, ua rau muaj kev ntxhov siab cuam tshuam
Kev caij tsheb kauj vab txhua hnub tsim micro-slip tsub zuj zuj ntawm cov ciam ciam
Kev Ua Tau Zoo
Txais tau shear strain: Tsawg dua lossis sib npaug li 2.5%
Saum toj 4%: qhov nyiaj tshuav nyiaj poob mus tas li degradation yuav nce ntxiv
Thermal mismatch yog thawj tus tsav tsheb ntawm ntev -lub sij hawm nplaum nplaum nyob rau hauv nplaum nplaum tshuab.
4. Ua ntej-Txhim kho qhov chaw ntxuav cov kuab tshuaj yuav tsum tau
Kev npaj deg txiav txim siab pib lub zog ntawm daim ntawv cog lus ntau dua li kev xaiv qib nplaum.
Pom zoo Cov Tshuaj ntxuav tes
| Solvent Hom | Residue Level | Adhesion cuam tshuam |
| Isopropyl cawv (IPA 70-99%) | Tsawg heev | Kev txhim kho siab |
| Ethanol | Tsawg | Kev txhim kho nruab nrab |
| Mild Detergent Solution | Nruab nrab | Hloov pauv |
| Acetone | Zero | Siab (tsis yog -uPVC muaj kev nyab xeeb ntau dhau) |
Cov teebmeem ntawm qhov chaw paug
| Cov kab mob | Peel Strength txo |
| Dust particles (>50 µm) | −10–15% |
| Silicone residues | −40–60% |
| Roj / roj zaj duab xis | −50–80% |
| PVC plasticizer Bloom | −20–35% |
Installation Protocol Requirements
Qhov kub thiab txias: 10-35 ° C
Lub sij hawm ziab tom qab ntxuav: Ntau dua lossis sib npaug li 10 feeb
Tsis muaj - kov lub sijhawm ua ntej kev sib txuas: Tsawg dua lossis sib npaug li 30 feeb
Kev siv siab tsawg kawg nkaus: 15-25 N / cm²
Kev tu tsis raug yog lub luag haujlwm rau ntau dua 60% ntawm qhov ua tsis tiav ntawm cov tshuaj nplaum thaum ntxov hauv kev teeb tsa.
Tshuaj Compatibility nyob rau hauv Adhesive Screen Systems
Adhesive kev ua tau zoo tsis yog txhua yam; Nws yog chemically rhiab heev rau plasticizers, UV stabilizers, thiab cov tshuaj ntxuav siv hauv cov kab ntau lawm uPVC.
System compatibility nyob ntawm:
Acrylic polymer saw stability
Plasticizer migration kuj
UV stabilizer cuam tshuam nrog PSA txheej
Kev nqus dej noo hauv cov ntoo substrate
3 Chemical Compatibility FAQs
Vim li cas cov nplaum qhov rai screen daim kab xev ua txawv ntawm uPVC piv rau txhuas?
uPVC muaj qis dua thiab laus dua- nyob ntawm lub zog ntawm lub zog (30–42 mN / m), thaum txhuas tuav ruaj khov dua lub zog saum npoo (45–55 mN / m), uas ua rau muaj zog dua thiab zoo ib yam adhesion ntawm txhuas.
Cov tshuab nplaum nplaum puas tuaj yeem siv rau ntawm cov xim ntoo?
Yog, tab sis kev ua tau zoo sib txawv vim yog txheej txheej thiab porosity. Acrylic-coated ntoo muab nruab nrab adhesion (10–16 N / 25mm), tab sis qhov sib txawv ntawm noo noo tuaj yeem txo qhov ntev - lub sij hawm ruaj khov.
Dab tsi yog qhov feem ntau ua rau cov nplaum nplaum tsis ua haujlwm hauv daim ntawv thov teb?
Kev tu tsis zoo ntawm qhov chaw thiab cov khoom siv hluav taws xob qis qis yog cov laj thawj tseem ceeb. Silicone contamination thiab UV-hnub nyoog uPVC txo cov tev lub zog thiab ua rau kom muaj kev pheej hmoo ntawm ntug.
