Cov khoom
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PVC Faux Tawv suav Synthetic thiab Ntshiab Tawv Dej-Resistant Hnab Eco-Friendly Recycling Fabric
PVC cov ntaub ntawv feem ntau yog hais txog polyvinyl chloride, uas yog ib tug polymerization los ntawm polymerization ntawm vinyl chloride monomer nyob rau hauv lub xub ntiag ntawm cov neeg pib xws li peroxides thiab azo tebchaw, los yog nyob rau hauv qhov kev txiav txim ntawm lub teeb thiab tshav kub raws li dawb radical polymerization mechanism. PVC tawv feem ntau yog hais txog PVC mos tawv, uas yog hais txog kev kho kom zoo nkauj ntawm phab ntsa uas siv cov ntaub ntawv yooj yim los qhwv cov phab ntsa sab hauv. Cov khoom siv yog mos hauv kev ntxhib los mos thiab mos hauv cov xim, uas tuaj yeem ua rau lub ntsej muag tag nrho ntawm qhov chaw, thiab nws qhov kev nkag siab tob ntawm peb sab kuj tuaj yeem txhim kho qib ntawm lub tsev. Ntxiv nrog rau lub luag haujlwm ntawm kev ua kom zoo nkauj ntawm qhov chaw, qhov tseem ceeb tshaj, nws muaj lub luag haujlwm ntawm lub suab nqus, suab rwb thaiv tsev, kev tiv thaiv noo noo thiab tiv thaiv kev sib tsoo.
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High-end Luxury Fine Texture Ntuj Tawv Outlook Nappa Semi PU Tawv Rau Tsheb Upholstery Rooj Tog
Kev siv cov tawv nqaij protein
Kev siv cov ntaub tawv nqaij yog qhov dav, feem ntau yog siv rau hauv khaub ncaws, khoom siv hauv tsev, khau thiab kaus mom, thiab lwm yam. Nyob rau hauv cov nqe lus ntawm cov khaub ncaws, nws yog tsuas yog siv nyob rau hauv high-end zam, suits, tsho, thiab lwm yam., thiab kuj yog feem ntau siv los ua high-end down tsho thiab sweaters; hais txog cov khoom siv hauv tsev, nws feem ntau yog siv los ua cov txaj, cushions, rooj zaum npog, thiab lwm yam.; nyob rau hauv cov nqe lus ntawm nkawm khau thiab kaus mom, nws yog feem ntau siv los ua cov khau tawv tawv zoo.
4. Qhov sib txawv thiab qhov zoo thiab qhov tsis zoo ntawm cov ntaub tawv tawv
Protein tawv thiab tawv tawv zoo sib xws hauv kev xav, tab sis cov tawv nqaij protein yog softer, sib dua, breathable, hws-absorbent thiab yooj yim los tswj dua li tawv tiag, thiab tus nqi qis dua cov tawv tiag. Txawm li cas los xij, qhov hnav tsis kam thiab tawv tawv ntawm cov tawv nqaij yog me ntsis qis dua cov tawv tawv, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov nrog lub zog siab, xws li cov ntaub ntawv khau, qhov zoo ntawm cov tawv tawv yog pom tseeb dua.
5. Yuav ua li cas tswj cov tawv nqaij protein?
1. Kev tu tsis tu ncua
Nws yog ib qho tseem ceeb heev los ntxuav cov tawv nqaij protein tsis tu ncua. Koj tuaj yeem siv kev tu kom qhuav los yog ntxuav dej. Thaum ntxuav, xyuam xim rau cov dej kub thiab lub sij hawm kom tsis txhob muaj kev puas tsuaj rau cov ntaub.
2. tiv thaiv tshav ntuj
Albumen tawv npuag muaj lub zog glossiness, tab sis tsis txhob raug tshav ntuj lossis lwm lub teeb muaj zog, txwv tsis pub nws yuav ua rau xim fading, yellowing thiab lwm yam teeb meem.
3. Muab tso rau hauv qhov chaw qhuav thiab qhov cua
Albumen tawv ntaub them nyiaj zoo rau permeability thiab noo noo nqus. Muab tso rau hauv qhov chaw ntub dej yuav ua rau lub ntsej muag fluff thiab ua rau lub ntsej muag glossiness. Yog li ntawd, nws yuav tsum tau muab tso rau hauv qhov chaw qhuav thiab ventilated.
Raws li cov ntaub ntawv high-end, cov tawv nqaij protein tau yeej qhov kev nyiam ntawm cov neeg siv khoom rau nws cov softness, lightness, breathability thiab yooj yim txij nkawm. -
Eco tus phooj ywg Nappa lis PU mos protein tawv tawv tawv tawv tawv tawv tsheb rooj ntaub
Protein tawv ntaub yog cov ntaub high-end ua los ntawm cov tsiaj protein, feem ntau yog siv los ua cov khaub ncaws high-end, cov khoom siv hauv tsev, thiab lwm yam Protein tawv npuag yog muab faib ua ob hom: ib qho yog silk protein npuag, lwm yam yog silk velvet ntaub, ob qho tib si fabrics yog ntuj, mos thiab xis. Protein tawv ntaub yog yam ntxwv los ntawm lightness, breathability, hws nqus, silky luster.
Cov yam ntxwv ntawm cov tawv nqaij protein
1. Kev xav zoo heev thiab kev ntxhib los mos
Protein tawv ntaub yog mos, muaj kev xav ntawm txhob lo lo ntxhuav, ilv zoo nkauj, siab gloss, thiab yog heev xis siv.
2. Muaj zog ua pa thiab nqus hws
Protein tawv ntaub muaj breathability zoo, thiab nws yuav tsis hnov qab thaum hnav ze ntawm lub cev; Nyob rau tib lub sijhawm, vim nws qhov kev ua tau zoo ntawm kev nqus dej noo, nws yog ib qho ntaub nrog "sweat Belt", uas tuaj yeem nqus tau tib neeg hws thiab ua kom lub cev qhuav.
3. Yooj yim los txheeb xyuas thiab khaws cia
Protein tawv ntaub yog ntuj nyob rau hauv cov khoom, thiab nws cov kev xav thiab glossiness ua raws li cov kev ntxhib los mos ntawm cov tawv tiag tiag, yog li nws yog ib qho yooj yim rau nco ntsoov cov neeg ntawm cov ntaub ntawv mos tawv. Nyob rau tib lub sijhawm, cov ntaub tawv nqaij protein kuj yooj yim los ntxuav thiab tswj. -
0.8MM daim tawv nqaij-xws li nplua-grained mos sheepskin pu protein tawv khaub ncaws tawv hnab accessories imitation tawv lis dag tawv tawv
Imitation tawv fabrics tawv-xws li tawv yog ib hom imitation tawv ntaub uas muaj qhov zoo sib xws thiab zoo li tawv tiag tiag, feem ntau yog ua los ntawm cov khoom siv hluavtaws xws li polyurethane lossis polyester. Nws ua tiav cov nyhuv ntawm imitation tawv los ntawm simulating cov nplej, gloss thiab zoo nkauj ntawm cov tawv tiag. Cov tawv nqaij-xws li tawv npuag muaj qhov hnav tsis zoo, tiv thaiv av thiab ntxuav yooj yim, yog li lawv tau siv dav hauv cov khaub ncaws, khau, hnab nqa khoom, kho kom zoo nkauj hauv tsev thiab lwm yam. cov
Cov yam ntxwv ntawm cov tawv nqaij-xws li tawv npuag Cov tsos thiab kev xav: Cov tawv nqaij-xws li tawv muaj qhov zoo sib xws thiab zoo li tawv tawv tiag tiag, thiab tuaj yeem muab qhov kov zoo. Durability: Nws muaj kev hnav zoo, tiv thaiv av thiab tu yooj yim, thiab tsim nyog rau kev siv mus ntev. Kev tiv thaiv ib puag ncig: Vim tias nws yog cov khoom siv hluavtaws, tawv tawv-xws li tawv tawv muaj kev tiv thaiv ib puag ncig zoo dua thiab tsis muaj teeb meem tiv thaiv ib puag ncig ntawm tsiaj tawv. Ua tsis taus pa: Txawm hais tias cov tawv nqaij-xws li tawv tawv tsis zoo ua pa, nws tseem haum rau qee cov khaub ncaws uas tsis tas yuav hnav ntev. Daim ntawv thov thaj chaw: Nws yog dav siv hauv khaub ncaws, khau, nra, kho kom zoo nkauj hauv tsev, tsheb sab hauv thiab lwm yam. -
Artificial tawv ntaub matte lychee qauv PU mos tawv los tiv thaiv wrinkle mos tawv tsho tsho tiv no khaub ncaws diy ntaub
Raws li lub npe implies, plaub-txoj kev stretch ntaub yog ib hom ntaub uas muaj elasticity thaum stretched, down, sab laug thiab txoj cai. Nws tuaj yeem hloov mus rau kev ua haujlwm ntawm tib neeg lub cev, ncab thiab ntsws nrog nws, thiab yog lub teeb thiab xis nyob. Nws tuaj yeem tswj tau qhov zoo nkauj ntawm cov khaub ncaws, thiab lub hauv caug, lub luj tshib thiab lwm yam ntawm cov khaub ncaws yuav tsis deformed thiab bulged vim lub sij hawm ntev hnav.
Plaub-txoj kev ncab ntaub feem ntau siv spandex stretch yarn los muab cov ntaub ib yam elasticity. Lub stretch ntaub uas muaj spandex xov paj yog muab faib ua warp elasticity, weft elasticity thiab warp thiab weft bidirectional elasticity. Plaub-txoj kev ncab ntaub yog ob qho tib si warp thiab weft bidirectional elasticity, thiab dav elastic elongation yog 10% -15%, thiab cov ntsiab lus spandex hauv cov ntaub yog li 3%.
Cov txheej txheem feem ntau yog siv rau plaub-txoj kev ncab yog ntxiv spandex stretch yarn rau cov ntaub, ua ntej twist cov xov paj thiab spandex npog xov paj ua ke los ua cov xov paj elastic, thiab cov twist yuav tsum tswj lub sijhawm pub mis ntawm ob qho tib si los tswj qhov loj ntawm elasticity ntawm cov xov paj. Hauv kev tsim thiab kev ua tiav, elongation ntawm cov xov paj thiab ntaub yuav tsum tau tswj kom tswj tau qhov elasticity ntawm cov khoom tiav.
Spandex stretch yarn muaj cov yam ntxwv ncab ntawm cov xov paj roj hmab, nrog kev tawg elongation txog li 500%. Nws tuaj yeem rov qab tau nws qhov qub ntev tom qab lub zog sab nraud tso tawm. Muaj peb hom: liab qab ib txheej los yog ob txheej txheej npog xov paj, tawv velvet xov paj los yog tawv core plied yarn. Ib txheej los yog ob txheej txheej npog xov paj yog yooj yim dua rau siv. -
Tawv npuag thickened composite daim txhuam cev perforated tawv tsheb tsheb sab hauv tawv tsev audio-visual chav suab haum breathable suab nrov txo pu tawv
Perforated tsheb sab hauv tawv tawv muaj nws tus kheej zoo thiab qhov tsis zoo, thiab seb nws puas haum rau kev siv yog nyob ntawm tus kheej xav tau thiab nyiam. cov
Qhov zoo ntawm perforated tsheb sab hauv tawv muaj xws li: High-end pom cov nyhuv: lub perforated tsim ua rau cov tawv nqaij zoo li upscale thiab ntxiv ib tug siab ntawm cov khoom kim heev rau sab hauv. Kev ua pa zoo dua: Cov qauv tsim perforated tuaj yeem txhim kho qhov ua pa ntawm cov tawv nqaij, tshwj xeeb tshaj yog nyob rau lub caij ntuj sov, kom tsis txhob muaj qhov khaus thaum zaum ntev. Cov nyhuv tiv thaiv zoo dua: Cov qauv perforated ua rau muaj kev sib txhuam ntawm lub rooj zaum saum npoo thiab txhim kho cov nyhuv los tiv thaiv plam. Txhim kho kev nplij siab: Qee cov neeg siv tau tshaj tawm tias tom qab siv lub rooj zaum tawv tawv, qhov kev nplij siab tau zoo tuaj, thiab lawv yuav tsis hnov qab txawm tias taug kev ntev. Txawm li cas los xij, perforated tsheb sab hauv tawv tawv kuj muaj qee qhov tsis zoo: Yooj yim kom qias neeg: Tus tsim perforated ua rau tawv tawv dua rau cov plua plav thiab av, yuav tsum tau tu ntau zaus thiab tu. rhiab heev rau cov dej noo: Cov tawv tiag tiag yog rhiab rau dej thiab ya raws, thiab yog tias tsis kho kom raug, nws yooj yim kom ntub los yog puas. Hauv cov ntsiab lus, perforated tsheb sab hauv tawv tawv muaj qhov zoo ntawm qhov pom kev, ua pa, tiv thaiv plam thiab kev nplij siab, tab sis nws kuj muaj qhov tsis zoo ntawm kev yooj yim kom qias neeg thiab rhiab rau cov dej noo. Cov neeg siv yuav tsum xaiv raws li lawv cov kev xav tau thiab nyiam. -
0.8mm ib puag ncig tus phooj ywg thickened Yangbuck PU tawv tawv imitation tawv ntaub
Yangbuck tawv yog cov khoom siv PU, tseem hu ua Yangbuck tawv lossis yaj hluavtaws tawv. Cov khoom no yog tus cwj pwm los ntawm cov tawv nqaij mos, tuab thiab tag nrho cov nqaij, xim saturated, nto zoo nkauj ze rau tawv, thiab zoo dej nqus thiab breathability. Yangbuck tawv yog dav siv, thiab yog siv rau hauv cov txiv neej khau, poj niam khau, me nyuam khau, khau kis las, thiab lwm yam. Nws kuj yog siv dav hauv hnab tes, khoom siv tsheb, rooj tog thiab lwm yam.
Hais txog qhov zoo ntawm Yangbuck tawv, nws qhov zoo yog tawv mos, hnav tsis kam, thiab folding kuj, thiab nws qhov tsis zoo yog yooj yim kom tau qias neeg thiab nyuaj los ntxuav. Yog tias koj xav tau cov khoom ua los ntawm cov tawv Yangbuck, nws raug nquahu kom siv cov tawv tawv tshwj xeeb kom huv si tsis tu ncua, thiab ua kom nws qhuav thiab tso cua kom tsis txhob raug tshav ntuj mus ntev. Vim tias cov khoom ua los ntawm Yangbuck tawv feem ntau tsis muaj dej, nws yog qhov zoo tshaj kom tsis txhob ntxuav lawv ncaj qha nrog dej. Yog tias koj ntsib cov stains, koj tuaj yeem siv cov tshuaj detergents lossis cawv los ntxuav lawv.
Feem ntau, Yangbuck tawv yog cov khoom siv zoo nrog kev nplij siab thiab ua haujlwm ntev. Txawm li cas los xij, koj yuav tsum tau ua tib zoo saib xyuas txhua hnub kom tswj tau nws qhov kev ntxhib los mos thiab gloss. -
USDA ntawv pov thawj biobased tawv manufacturers Eco-phooj ywg txiv tsawb vegan tawv xyoob fiber ntau bio-raws li tawv Txiv tsawb Zaub Tawv
Vegan tawv ua los ntawm txiv tsawb qoob loo pov tseg
Banofi yog cov tawv ntoo ua los ntawm cov txiv tsawb qoob loo pov tseg. Nws tau tsim los muab vegan lwm txoj rau tsiaj thiab yas tawv.
Kev lag luam tawv tawv ua rau cov pa roj carbon ntau dhau, kev siv dej loj, thiab pov tseg cov tshuaj lom thaum lub sijhawm tanning.
Banofi kuj rov siv cov khib nyiab los ntawm cov txiv tsawb, uas tsuas yog tsim cov txiv hmab txiv ntoo ib zaug hauv lawv lub neej. Raws li lub ntiaj teb cov txiv tsawb loj tshaj plaws hauv ntiaj teb, Is Nrias teb tsim 4 tons ntawm pov tseg rau txhua tuj txiv tsawb tsim, feem ntau yog pov tseg.
Lub ntsiab raw khoom yog tsim los ntawm fibers muab rho tawm los ntawm txiv tsawb qoob loo pov tseg siv los tsim Banofi.
Cov fibers no yog tov nrog ib tug sib tov ntawm tej yam ntuj tso pos hniav thiab adhesives thiab coated nrog ntau txheej xim thiab txheej. Cov khoom no yog tom qab ntawd coated rau ntawm daim ntaub rov qab, ua rau cov khoom siv ruaj khov thiab muaj zog uas yog 80-90% bio-based.
Banofi hais tias nws cov tawv nqaij siv 95% dej tsawg dua cov tawv tsiaj thiab muaj 90% tsawg carbon emissions. Lub hom phiaj cia siab tias yuav ua tiav cov khoom siv bio-raws li yav tom ntej.
Tam sim no, Banofi tau siv dav hauv kev lag luam zam, rooj tog zaum, tsheb thiab ntim khoom lag luam -
Waterproof Hnav-Resistant Anti-Slip Yas Bus Mat Homogeneous PVC Yob Flooring
PVC yas flooring yog cov flooring ua los ntawm PVC yas ua cov khoom tseem ceeb. Cov ntaub ntawv raw ntawm PVC yas flooring yog tib yam li cov yas zoo tib yam. Ntxiv rau cov resin, lwm yam khoom siv raw xws li plasticizers, stabilizers, fillers, thiab lwm yam yuav tsum tau ntxiv. Txawm li cas los xij, ntau cov khoom ntxiv tau ntxiv rau cov yas hauv pem teb vim nws tsis tshua muaj kev nruj, shear force, tearing force, thiab lwm yam thaum siv, thiab feem ntau raug rau siab thiab kev sib txhuam. Ntawm qhov tod tes, nws tuaj yeem txo cov nqi ntawm cov khoom, thiab ntawm qhov tod tes, nws tuaj yeem txhim kho qhov kev ruaj ntseg ntawm qhov ntev, qhov kub thiab txias tsis kam ntawm cov khoom.
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PVC Bus Flooring Hnav Resistant Homogeneous PVC Vinyl Flooring Tsev Kho Mob Flooring
Plastic pem teb yog lwm lub npe rau PVC pem teb. Cov khoom tseem ceeb yog cov khoom siv polyvinyl chloride. PVC pem teb tuaj yeem ua rau ob hom. Ib qho yog homogeneous thiab pob tshab, uas yog, cov qauv ntawm cov khoom siv hauv qab mus rau saum yog tib yam.
Lwm hom yog sib xyaw, uas yog, txheej sab saum toj yog ntshiab PVC pob tshab txheej, thiab txheej luam ntawv thiab npuas txheej yog ntxiv hauv qab no. PVC pem teb yog dav siv ntau yam hauv tsev thiab kev lag luam vim nws cov qauv nplua nuj thiab ntau xim.
Plastic pem teb yog ib lo lus dav. Muaj ntau nqe lus hauv Is Taws Nem, uas yuav tsum tau hais tias tsis yog qhov tseeb. Yas pem teb yog ib yam tshiab ntawm lub teeb yuag pem teb cov khoom siv kho kom zoo nkauj uas yog nrov heev nyob rau hauv lub ntiaj teb no niaj hnub no, kuj hu ua "cov khoom siv hauv pem teb sib sib zog nqus".
Nws yog cov khoom lag luam nrov hauv Europe, Asmeskas thiab Nyiv thiab Kaus Lim Qab Teb hauv Asia. Nws yog nrov txawv teb chaws. Nws tau nkag mus rau Suav lag luam txij thaum xyoo 1980s. Nws tau raug lees paub thoob plaws hauv lub nroog loj thiab nruab nrab hauv Suav teb thiab tau siv dav, xws li cov tsev nyob sab hauv tsev, tsev kho mob, tsev kawm ntawv, cov tsev ua haujlwm, cov chaw ua haujlwm, cov chaw pej xeem, khw muag khoom, kev lag luam, chaw ntau pob thiab lwm qhov chaw. -
Tshiab Tsim Non-Directional Homogeneous PVC Vinyl Flooring rau Tsev Kho Mob
Homogeneous vinyl flooring yog tsim los siv ntau theem nrog rau daim ntawv qhia hnub, sib sau ua ke thiab / lossis laminating. Ua ntej, cov khoom siv raw uas suav nrog limestone, polyvinyl chloride, plasticizer, stabilizers thiab pigments, yog sib xyaw kom zoo. Thaum sib tov, cov khoom yog consolidated thiab tsim rau hauv ib daim ntawv. Tom qab ntawd daim ntawv yog txias, tsim rau hauv yob. thiab thaum kawg ntim.
Vinyl homogeneous flooring yog pheej yig flooring daws thaum piv nrog rau lwm cov ntaub ntawv flooring, thiab yog
incredibly stain resistant. Cov txiaj ntsig no ua rau hom vinyl flooring yog qhov kev xaiv zoo rau thaj chaw tsheb loj.
Nrog zoo vinyl flooring koj tuaj yeem tsim qhov chaw zoo tshaj plaws uas yuav ua haujlwm zoo thiab niaj hnub. Vinyl heterogeneous flooring muaj ntau txoj kev xaiv thiab cov txiaj ntsig thiab tuaj nrog cov thickness sib txawv. Nws kuj yog cov qauv lossis xim thiab nws feem ntau siv rau hauv cov cheeb tsam uas muaj cov dej noo siab xws li cov chaw soj nstuam, chav dej thiab chav ua noj thiab. -
Anti-Slip Tsheb npav PVC Flooring nyob rau hauv yob rau Subway Tsheb ciav hlau chav dej yas ntaub pua plag Mat Bus Pem teb
Cov kua nplaum hauv pem teb hauv tsev kho mob tsis muaj kuab lom. Txhua qhov chaw hauv tsev kho mob muaj qhov xav tau siab heev, vim lub tsev kho mob yog qhov chaw kho mob thiab cawm neeg txoj sia. Nws yuav tsum yog ib puag ncig tus phooj ywg nyob txhua qhov chaw kom ntseeg tau tias kev noj qab haus huv ntawm cov neeg mob. Tag nrho cov khoom siv hauv tsev kuj yuav tsum yog cov ntaub ntawv zoo ib puag ncig, yog li nws yuav zoo rau kev noj qab haus huv ntawm txhua tus tswv cuab. Yog li ntawd, cov kua nplaum hauv pem teb hauv tsev kho mob tsis muaj kuab paug.
Cov kua nplaum hauv pem teb dav siv hauv tsev kho mob yog ua los ntawm cov ntaub ntawv polyvinyl chloride. Nws yog cov khoom siv kho kom zoo nkauj hauv pem teb nrov heev, zoo ib puag ncig zoo, thiab tsis muaj teeb meem rau tib neeg thiab ib puag ncig. Lub tsev kho mob hauv pem teb kua nplaum muaj kev tiv thaiv zoo thiab tiv thaiv kab mob. Feem ntau muaj ob hom: multi-layer composite type thiab homogeneous permeable hom.
Yas pem teb yog ib yam tshiab ntawm lub teeb yuag pem teb kho kom zoo nkauj cov khoom uas yog nrov heev nyob rau hauv lub ntiaj teb no niaj hnub no, kuj hu ua lub teeb yuag pem teb khoom. Nws yog cov khoom lag luam nrov hauv Europe, Amelikas, Nyiv thiab Kaus Lim Qab Teb hauv Asia. Nws yog nrov txawv teb chaws. Nws nkag mus hauv Suav lag luam thaum ntxov xyoo 1980 thiab tau pom dav dav hauv cov nroog loj thiab nruab nrab hauv Suav teb. Nws yog dav siv, xws li tsev nyob sab hauv tsev, tsev kho mob, tsev kawm ntawv, chaw ua haujlwm, chaw ua lag luam, chaw ntau pob thiab lwm qhov chaw.
PVC pem teb yog hais txog hauv pem teb uas tsim los ntawm cov ntaub ntawv polyvinyl chloride. Tshwj xeeb, nws yog ua los ntawm polyvinyl chloride thiab nws cov copolymer resin ua cov ntaub ntawv tseem ceeb, thiab ntxiv nrog cov fillers, plasticizers, stabilizers, colorants thiab lwm yam auxiliary cov ntaub ntawv ntawm ib daim ntawv zoo li txuas mus ntxiv substrate los ntawm txheej txheej txheej los yog calendering, extrusion los yog extrusion txheej txheem.
Cov kua nplaum hauv pem teb dav siv hauv tsev kho mob yog ua los ntawm cov ntaub ntawv polyvinyl chloride. Nws yog cov khoom siv kho kom zoo nkauj hauv pem teb nrov heev, zoo ib puag ncig zoo, thiab tsis muaj teeb meem rau tib neeg thiab ib puag ncig. Cov kua nplaum hauv tsev kho mob muaj cov tshuaj tiv thaiv zoo thiab tiv thaiv kab mob. Feem ntau muaj ob hom: multi-layer composite type thiab homogeneous permeable hom.
