





8079 Aluminium Ntawv Nyiaj 12μm
8079 Aluminium Ntawv Nyiaj 12μm
Nyob rau hauv high-end saj zawg zog ntim kev lag luam, cov khoom ua tau zoo dictates kawg cov khoom tiav. Barrier khoom, yooj, thiab kev ua haujlwm ruaj khov yog qhov tseem ceeb. Lawv ncaj qha txiav txim lub neej txee, kev tshwm sim, thiab ntau lawm efficiency.
8079 Aluminium Foil 12μm yog cov khoom ntim zoo tshaj plaws. Nws tau dhau los ua qhov kev xaiv tseem ceeb rau zaub mov, chaw ua tshuaj paus, thiab high-end niaj hnub tshuaj composite ntim. Cov khoom no zoo kawg nkaus sib npaug ultra-thin thickness nrog zoo heev barrier zog.
Nws kuj muaj qhov zoo tshaj plaws ductility thiab processability. Cov ntawv ci no zoo daws cov ntsiab lus mob hauv kev lag luam. Cov no suav nrog kev ua haujlwm tsis zoo folding, siab pinhole tus nqi, thiab tsis txaus barrier kev ua tau zoo.
Kab lus no muab kev txheeb xyuas qhov tob tob. Nws npog cov ntaub ntawv txhais, tshuaj muaj pes tsawg leeg, Kev ua haujlwm tsis sib haum, thiab cov txiaj ntsig tseem ceeb. Nws kuj qhia txog cov xwm txheej ntawm daim ntawv thov, cov txheej txheem ntau lawm, thiab cov txheej txheem kev yuav khoom. Lub hom phiaj yog los pab cov neeg yuav khoom thoob ntiaj teb xaiv cov khoom lag luam thiab ntsuas cov neeg xa khoom sai.

Kuv. Kev to taub 8079 Aluminium Ntawv Nyiaj 12μm
Dab tsi txhais 8079 Aluminium Ntawv Nyiaj?
8079 aluminium ntawv nyiaj belongs rau 8xxx series alloys. Nws yog ib yam hlau-silicon raws li alloy. Nws yog tshwj xeeb optimized rau saj zawg zog composite ntim scenarios. Tsis zoo li kev lag luam ntshiab aluminium ntawv ci los yog cov alloys zoo tib yam, 8079 siv ib tug meej hlau-silicon piv.
Qhov kev tsim no muab ultra-siab yooj thiab tsawg tus pinhole tus nqi. Nws kuj ua kom muaj kev sib xyaw ua ke zoo heev. Yog li ntawd, nws ua hauj lwm raws li ib tug benchmark khoom nyob rau hauv high-end saj zawg zog ntim.
Qhov tseem ceeb ntawm 12μm Specification
0.012 hli (12-micron) ultra-thin specification yog cov qauv kev lag luam tseem ceeb. Ua 12μm ultra-thin ntawv ci cuam tshuam nrog kev ua haujlwm siab heev. Nws yuav tsum tau muaj kev tswj xyuas meej ntawm dov nro, qho so, thiab ceev.
Qhov no precision zam tsis xws li pinholes, thickness sib txawv, thiab nto khawb. Muab piv rau cov ntawv tuab tuab, 12μm ntawv ci yog sib dua. Nws muab cov nqi qis dua. Nws yog sib xws nrog high-speed automated ntim kab.
Sib piv Advantage dua lwm yam Alloys
Hais txog kev sib txawv ntawm cov khoom, 8079 qhia tau hais tias muaj txiaj ntsig zoo tshaj 8011 thiab 1235. 1235 ntawv ci muaj siab purity tab sis raug kev txom nyem los ntawm kev tsis yooj yim. 8011 yog dav siv tab sis ua tsis zoo nyob rau hauv ultra-thin gauges. Hloov pauv, 8079 Aluminium Foil 12μm ua tiav qhov sib npaug zoo. Nws combines barrier zog, yooj, thiab processability. Qhov no ua rau nws irreplaceable nyob rau hauv high-standard saj zawg zog ntim.
II. Chemical Composition thiab Material Properties
2.1 Precise Chemical Formulation
Kev ua haujlwm tseem ceeb ntawm 8079 stems los ntawm nws tus kheej formulation. Nws nta cov ntsiab lus tsis tshua muaj silicon thiab cov hlau tsim nyog. Hlau refines lub puab grain qauv ntawm aluminium ntawv ci. Qhov no ho txhim khu ductility thiab khoov qaug zog kuj.
Qhov qis silicon ratio zoo tiv thaiv nkig intermetallic theem. Qhov no ua kom lub ntsej muag flatness thiab yoog raws hauv qhov ntsuas ultra-thin. Cov ntsiab lus taug qab yog tswj hwm nruj raws li cov qauv thoob ntiaj teb. Qhov no minimizes internal defects thiab pinhole tsim. Nws comprehensively txhim kho cov khoom stability.
2.2 Core Physical Performance Metrics
- Zoo heev Barrier Performance:cov 8079 Aluminium Foil 12μm muaj cov qauv siv hlau ntom ntom. Nws tag nrho thaiv cov pa oxygen, Dej Vapor, ultraviolet rays, thiab cov kab mob. Nws zoo tiv thaiv oxidation, noo noo-induced deterioration, thiab photoaging.
- Zoo Flexibility thiab Folding Resistance:Cov khoom ua tau zoo heev bending kev ua tau zoo. Nws withstands rov folding thiab khoov yam tsis muaj cracking. Nws tsis nthuav cov pinholes uas twb muaj lawm. Nws yoog mus rau cov duab ntim khoom thiab cov txheej txheem tom qab ua tiav.
- High elongation thiab sib sib zog nqus kev ua tau zoo:Nws nta ruaj khov mechanical ductility. Nws yog adaptable rau stamping, ncab, thiab cov txheej txheem lamination. Nws tsis tawg lossis deform thaum lub sijhawm ua haujlwm nrawm nrawm.
- Zoo Thaum tshav kub kub Sealability thiab Composite Adaptability:Lub foil nto yog huv si thiab uniform. Nws muab kev sib raug zoo zoo nrog PET, PE, Pa, thiab CPP films. Nws kuj sib raug zoo nrog cov ntaub ntawv uas yog ntawv. Nws tsim ib tug robust composite qauv.
2.3 Muaj cov khoom Tempers
- Saib Tauj (Soft State):Qhov no yog cov pa mainstream temper. Tom qab tag nrho annealing, cov khoom ua tiav kev pom kev yooj yim thiab ductility. Nws yog dawb los ntawm kev ntxhov siab sab hauv thiab tsis tawg thaum folded.
- H18 / H19 Kev kub ntxhov (Customizable):Rau kev ntim khoom tshwj xeeb xav tau rigidity thiab tensile lub zog. Qhov kev npau taws no muaj zog tensile ntau dua thiab cov qauv kev ruaj ntseg.
I. Ua kom tiav cov khoom Specifications
Peb tsim 12μm 8079 ultra-thin aluminium foil nruj me ntsis ua raws li cov qauv thoob ntiaj teb. Parameters yog standardized, thiab qhov ntev yog customizable.
| Yam | Parameter |
|---|---|
| Alloy Tsimcov | 8079 |
| Thicknesscov | 0.012mm (12μm, kam rau ua nruj tswj tau) |
| Dav Ntaucov | 100-1600mm (kev cai txiav-rau-ntev muaj) |
| Kubcov | Saib Tauj (H18 / H19 customization muaj) |
| Core Inner Diametercov | 76mm / 152mm |
| Coil Outer Diametercov | Customized raws li cov neeg siv khoom xav tau |
| Nto Zoocov | Tsis muaj roj, tsis muaj pinholes, tsis muaj khawb; nto yog huv si thiab du |
| Cov Qauv Ua Haujlwmcov | Cov qauv thoob ntiaj teb dav dav (ASTM, IN, Tus kab laug gb) |
IV. Core zoo ntawm 8079 Aluminium Ntawv Nyiaj 12μm
4.1 Ultra-High Barrier Performance
4.2 Zoo Flexibility thiab Folding Resistance
4.3 Versatile Composite Processing Performance
4.4 Kev nyab xeeb siab thiab Environmental Friendliness
V. Tej thaj chaw thov
5.1 Khoom noj khoom haus Flexible Ntim
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Lub tshuab nqus tsev ntim khoom noj: Composite nrog PET / PE thiab PA / CPP los tsim cov hnab ntim rau cov nqaij siav, npaj zaub mov, thiab deli cov khoom. Nws tiv taus siab siv lub tshuab nqus tsev uas tsis muaj perforation lossis deformation, tshem tawm tag nrho cov huab cua thiab tiv thaiv oxidative deterioration kom ntev txee lub neej ntawm chav tsev los yog tub yees kub.
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Frozen Food Packaging: Tswj tau zoo heev ntawm qhov kub thiab txias tsis muaj embrittlement los yog tawg. Zoo tagnrho rau khov dumplings, nqaij nruab deg, thiab khov nqaij ntim. Nws tiv taus qhov kub thiab txias noo noo yaig, tiv thaiv Frost tsim, ziab, thiab tsw sib tov kom ruaj khov khoom noj khoom haus zoo thiab saj.
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Kas fes & Tshuaj yej ntim: Features superior oxygen, ya raws, thiab lub teeb barrier muaj peev xwm. Nws locks aroma Cheebtsam ntawm kas fes thiab tshuaj yej, tsis txhob ya raws caking thiab oxidative tsw poob, ua nws cov khoom siv zoo tshaj plaws rau cov tshuaj yej siab kawg thiab kas fes hauv lub hnab ntim khoom sab hauv thiab sab nrauv.
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Cov mis nyuj & Khoom noj txom ncauj ntim: Haum rau mis hmoov, cheese, yogurt sealing films, txiv ntseej, ncuav qab zib, thiab puffed zaub mov ntim. Nws thaiv cov pa phem sab nraud thiab tiv thaiv kom tsis txhob ya raws, lwj, thiab discoloration thaum hloov mus rau high-ceev lub hnab-ua thiab sealing kab rau siab yield thiab hwm ntim tsos.
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Tsiaj Ntim Khoom Noj: Siv rau high-end khoom noj miv, noj dev, thiab cov hnab ntim khoom noj khoom haus sib xyaw. Nws muab lub sijhawm ntev ya raws thiab oxidation tsis kam, daws cov teeb meem roj oxidation thiab pwm hauv cov khoom noj tsiaj thiab ua tau raws li cov qauv kev nyab xeeb thiab cov kev cai tshiab rau cov khoom noj tsiaj.

5.2 Pharmaceutical Sterile Protective Packaging
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Pharmaceutical Blister Ntim: Siv rau PTP hlwv ntim cov ntsiav tshuaj, tsoom qab, thiab granules. Nws ua tiav cov cua sov sealing zoo thiab nruj zoo heev kom cais cov kab mob sab nraud, tiv thaiv ya raws thiab oxidation tsis ua hauj lwm, thiab txhim kho kev siv tshuaj kom ruaj khov thaum lub sijhawm khaws cia ntev, siab adapting rau automated kws tshuaj ntau lawm kab.
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Medical Composite Medicine Bags: Siv rau cov tshuaj hmoov, kua tshuaj pouches, thiab tsoos suav tshuaj ntim khoom. Flexible thiab tawg-resistant thaum thauj thiab khaws cia, nws muab kev tiv thaiv ntau yam nrog rau kev tiv thaiv noo noo, teeb thaiv, thiab bacteriostasis los txhawb kev thauj mus los ntev thiab khaws cia ntev.
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Cov Khoom Siv Kho Mob Sterilization Ntim: Haum rau kev ntim khoom tsis muaj menyuam ntawm kev kho mob catheters, koob txhaj, cov khoom siv phais, thiab precision instruments. Nws tiv taus EO roj thiab cov txheej txheem kub kom tsis muaj menyuam thiab tswj xyuas kev ua haujlwm ruaj khov tom qab ua kom tsis muaj menyuam kom tsis txhob muaj kuab paug thib ob thiab ua kom muaj kev nyab xeeb ntawm kev kho mob..
5.3 Tshuaj Txhua Hnub & Muaj kev tiv thaiv ntim
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High-End Cosmetic Flexible Ntim: Siv rau essence, cream, daim npog ntsej muag, skincare kua, thiab cosmetic soft ntim. Nws tag nrho thaiv ultraviolet rays thiab oxygen los tiv thaiv cov khoom xyaw oxidation thiab tsis ua hauj lwm thaum xa high-end ntim kev ntxhib los mos los txhim kho cov khoom qib..
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Fine Chemical Ntim: Haum rau volatile, deliquescent, thiab oxidizable tshuaj additives, tsw, tshuaj tsw qab, thiab cov khoom siv hmoov zoo. Nws qhov kev ua haujlwm siab barrier tiv thaiv volatilization, noo noo caking, thiab tivthaiv deterioration kom stabilize tshuaj cov khoom ua tau zoo.
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Electronic Component Moisture-Proof Ntim: Siv rau kev ntim khoom ntim khoom ntim rau cov chips, circuit boards, precision resistors, Psacacitors, thiab me me sensors. Nws cais cov dej noo, hmoov av, thiab kev cuam tshuam me me zoo li qub los tiv thaiv oxidation thiab kev ua haujlwm puas thaum lub sijhawm khaws cia thiab kev thauj mus los.
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Tshiab Zog Khoom Ntim Ntim: Siv rau kev ntim khoom ntawm cov roj teeb lithium me me thiab cov roj teeb tab. Nws balances yooj, barrier kev ua tau zoo, thiab conductivity kom tau raws li kev tiv thaiv kev cai rau precision tshiab zog Cheebtsam.
VI. Vim li cas thiaj xaiv 0.012mm Thickness 8079 Aluminium Ntawv Nyiaj?
Lub thickness ntawm ultra-thin ntawv nyiaj ncaj qha cuam tshuam tus nqi, kev ua tau zoo, thiab adaptability. 12μm specification muaj kev sib tw zoo.
Ua ntej, nws ua tiav qhov kev pom zoo sib npaug ntawm kev cuam tshuam kev ua haujlwm thiab cov nqi khoom siv. Piv rau 9μm ntawv ci, 12μm 8079 muaj tus pinhole qis dua. Ib xi nkoos, piv rau 15μm thiab tuab foils, nws yog sib dua. Chav tsev nqi qis dua, txo cov nqi ntim tag nrho.
Thib peb, lub 12μm thickness muaj nruab nrab softness thiab hardness. Nws zoo kawg nkaus phim cov kev sib dhos ntawm cov kab ntim khoom siv ceev ceev. Cov teeb meem xws li jamming lossis breakage yog zam.
VII. Kev sib piv nrog lwm cov Alloy Aluminium Foils
Ua kom yooj yim xaiv cov khoom siv, peb piv peb lub ntsiab aluminium foils. Txhua yam yog tib yam 12μm thickness.
| Cov khoom sib piv | 8079 0.012mm | 8011 0.012mm | 1235 0.012mm |
|---|---|---|---|
| Barrier Performancecov | ★★★★★ | ★★★★★☆ | ★★★★ |
| Yooj yimcov | ★★★★★ | ★★★★ | ★★★★ |
| Folding Resistancecov | ★★★★★ | ★★★★ | ★★★ |
| Composite Processabilitycov | Zoo heev | Zoo | Zoo |
| Adaptabilitycov | Adaptable siab heev | Hloov tau | Xws luag |
Qhov kev sib piv qhia meej meej tias 8079 Aluminium Ntawv Nyiaj 12μm ua tiav. Nws yog cov khoom siv txhim khu kev qha tshaj plaws rau kev ntim khoom ntim tau yooj yim.
VIII. Cov txheej txheem ntau lawm
Ua 12μm ultra-nyias 8079 aluminium foil xav tau cov cuab yeej precision. Nws kuj xav tau kev tswj kom paub tab. Cov txheej txheem ntau lawm ua kom ruaj khov zoo thiab ua haujlwm zoo ib yam.
- Aluminium Ingot Melting thiab Casting:Xaiv cov khoom siv high-purity aluminium. Precisely piv hlau thiab silicon ntsiab rau melting. Cam khwb cia tsim nyog aluminium billets.
- Kub Rolling thiab Txias Rolling:Siv multi-pass kub dov thiab precision txias dov. Maj mam txo cov thickness ntawm lub billet. Tshem tawm kev ntxhov siab sab hauv thiab txhim kho qhov ntom ntom.
- Ultra-Thin Ntawv Nyiaj Rolling:ntiav cov kws tshaj lij foil rolling khoom. Precisely tswj dov nro, hov ceev, thiab kub. Yob cov khoom siv hauv paus rau 12μm specification.
- Intermediate Annealing thiab Final Annealing:Siv cov txheej txheem annealing. Tshem tawm cov kev ntxhov siab sab hauv uas tsim los thaum dov. Optimize cov khoom ductility los ua O-temper soft foil.
- Nto huv thiab tshuaj xyuas Pinhole:Ntxuav cov roj stains thiab impurities los ntawm aluminium foil nto. Ua tag nrho cov pinhole tshuaj xyuas. Ua tib zoo tso tseg cov khoom tsis ua raws cai.
- Txoj kab, Ntim, thiab kawg QC:Slit rau kev cai dav raws li cov neeg siv khoom xav tau. Ua kev soj ntsuam zaum kawg ntawm cov tuab, nplaim, thiab cov khoom siv kho tshuab. Ua haujlwm export-qib txheem ntim.
X. Cov txheej txheem rau xaiv tus neeg muab khoom zoo
Vim li cas thiaj xaiv Henan Huawei Aluminium Co., Ltd. (HWALU)?
Hauv kev yuav khoom ntawm 8079 12μm ultra-nyias aluminium ntawv ci, ntau manufacturers ntsib teeb meem. Cov no suav nrog qhov tsis ruaj khov ultra-nyias dov thiab tus pinhole siab. Xaiv lub Hoobkas txhim khu kev qha yog qhov tseem ceeb. Henan Huawei Aluminium Co., Ltd., Ltd. (HWALU) yog lub chaw tsim khoom.
1. Muaj zog Source Factory Strength
Henan Huawei Aluminium Co., Ltd., Ltd. nyob hauv Gongyi Aluminium Industrial Park. Nws yog ib tug loj private aluminium foil manufacturing enterprise. Lub tuam txhab integrates R&D, ntau lawm, ua, thiab export.
Peb muaj a 250,000 m² standardized ntau lawm puag. Peb muaj tag nrho cov txheej txheem high-end ntau lawm kab. Tsis zoo li cov tub luam zoo tib yam, peb muaj peb tus kheej ntau lawm rhiav. Peb ua haujlwm peb tus kheej cov chaw soj ntsuam zoo thiab R&D pab pawg. Peb tswj tag nrho cov txheej txheem los ntawm txhuas ingot casting rau cov khoom tiav slitting.
2. Mature Ultra-thin Rolling txheej txheem
12μm ultra-nyias aluminium ntawv ci muaj qhov xav tau siab heev. Henan Huawei Aluminium Co., Ltd., Ltd. muaj ntau tshaj kaum xyoo ntawm kev paub. Peb muaj cov kws tshaj lij kev R&D pab. Lawv txawj nyob rau hauv cov txheej txheem hlau-silicon rau 8079 hlau alloy.
Peb tuaj yeem tswj cov kev ntsuas dov kom meej. Peb pib daws cov teeb meem uas tshwm sim hauv ultra-nyias aluminium ntawv ci. Peb tiav lawm 8079 0.012mm aluminium foil boasts core zoo. Nws muaj qhov tsis tshua muaj pinhole tus nqi thiab me me thickness kam rau ua.

3. Full-Dimensional Customization Capability
Hais txog qhov sib txawv ntawm cov neeg siv khoom ntau lawm kab thiab ntim tsim, peb muab cov kev pab cuam customization ib-nres. Peb tuaj yeem kho qhov dav dav ntawm 100-1600mm. Peb kuj tuaj yeem kho cov coil sab nraud diameters thiab cov tub ntxhais sab hauv diameters.
Seb rau me me batch sampling los yog loj batch export txiav txim, peb tuaj yeem ua raws li cov neeg siv khoom xav tau. Peb cov khoom yuav tsum tsis muaj kev ua haujlwm thib ob thiab tso cai siv ncaj qha rau ntawm cov tshuab.
4. High-Standard Quality Control System
Lub tuam txhab nruj me ntsis siv ntau yam kev tsim khoom thoob ntiaj teb. Peb tsim kom muaj cov txheej txheem kev tswj xyuas zoo. Txhua batch ntawm 8079 0.012mm aluminium foil raug kuaj nruj heev. Kev ntsuam xyuas muaj xws li thickness kam rau ua, tag nrho pinhole tshuaj xyuas, thiab kev ntsuam xyuas cov cuab yeej cuab tam.
Cov khoom lag luam tau dhau daim ntawv pov thawj kev nyab xeeb ntawm cov khoom noj thiab cov tshuaj ntim tshuaj raws li kev soj ntsuam. Lawv tsis muaj tshuaj lom, tsw tsw, thiab tsis muaj teeb meem tshuaj leaching.
5. Kev nplua nuj Export
Henan Huawei Aluminium Co., Ltd., Ltd. muaj ntau xyoo ntawm kev paub txog kev xa tawm txawv teb chaws. Peb cov khoom raug xa tawm mus rau Tebchaws Europe, Amelikas teb, Southeast Asia, thiab Middle East. Rau export xaj, peb siv dej-pov thawj, plua plav pov thawj, shock-resistant export tshwj xeeb ntoo crates.
Peb tuaj yeem muab cov ntawv xeem cov khoom tiav thiab daim ntawv pov thawj tsim nyog. Qhov no ua kom muaj kev ua raws cai thiab ruaj khov xa khoom xa tuaj txawv teb chaws.
6. Comprehensive Technical Service
Peb lub tuam txhab muab cov qauv kuaj dawb thiab kev taw qhia ib leeg. Peb muab cov kev daws teeb meem customized thiab kev pabcuam xa khoom sai. Rau qhov sib txawv ntawm cov neeg siv khoom lamination txheej txheem, peb cov kws tshaj lij pab pawg tuaj yeem muab cov lus qhia tshwj xeeb. Meanwhile, peb tus kheej lub peev xwm loj loj ua kom muaj cov khoom muag txaus. Peb teb sai sai rau cov neeg siv khoom xav tau kev txiav txim sai.
XI. Cov Lus Nquag Nug (FAQ)
Qi1: Cov kev lag luam twg yog cov ntawv thov tseem ceeb rau 8079 Aluminium Ntawv Nyiaj 12μm?
A: Nws yog dav siv nyob rau hauv high-end saj zawg zog ntim teb. Cov ntawv thov npog cov ntim khoom noj, kev ntim tshuaj, kas fes thiab tshuaj yej ntim, tsiaj ntim khoom noj, cov khoom ntim khoom zoo nkauj, thiab industrial composite ya raws-pov thawj ntim scenarios.
Q2: Dab tsi yog qhov txawv ntawm 8079 Txhuas Ntawv Nyiaj thiab 8011 aluminium ntawv ci?
A: Piv rau 8011 aluminium ntawv ci, 8079 aluminium ntawv ci muab superior yooj, folding tsis kam, thiab barrier kev ua tau zoo. Nws yog tsim rau high-end saj zawg zog composite ntim nrog xav tau kev pab.
Q3: yog 12m 8079 aluminium foil haum rau lub tshuab nqus tsev ntim khoom?
A: Tsim nyog kiag li. 12μm specification 8079 ultra-thin aluminium foil muaj cov pa oxygen thiab dej vapor barrier muaj peev xwm, nrog lub tshuab nqus tsev ruaj khov.
Qi4: Ua li 8079 Aluminium Foil 12μm txhawb dav thiab coil txoj kab uas hla customization?
A: Yog lawm, peb ua. Peb tuaj yeem muab cov kev pabcuam customization tag nrho, npog qhov dav ntawm 100-1600mm, coil sab nraud diameters, coil luj, thiab slitting specifications.
XII. Xaus
Nrog nws ultra-siab barrier kev ua tau zoo, zoo heev yooj thiab folding kuj, ruaj khov ua kev ua tau zoo, thiab kev nyab xeeb siab, 8079 Aluminium Foil 12μm sawv tawm hauv kev lag luam ntim khoom ntim ultra-nyias.
Nws zoo kawg nkaus daws ntau yam kev ua tau zoo ntawm cov ntawv txhuas txhuas hauv cov khoom ntim khoom siv high-end saj zawg zog.
Rau cov tuam txhab ntim khoom mob siab rau cov khoom zoo, kev xyuas xim, thiab kev ua lag luam kev sib tw, xaiv cov khoom zoo 8079 Aluminium Ntawv Nyiaj 12μm ultra-nyias aluminium ntawv ci tsis tsuas yog muab kev ruaj ntseg ruaj ntseg rau lub txee lub neej thiab ntim qib ntawm cov khoom kawg tab sis kuj zoo tswj cov nqi tsim khoom., comprehensively txhim kho lub lag luam kev lag luam kev sib tw kom zoo dua.




