Qhov sib txawv ntawm Eva thiab Yas: Txhua Yam Koj Yuav Tsum Tau Paub

Hauv kev tsim kho niaj hnub thiab cov khoom tsim khoom, cov ntaub ntawv ua si tseem ceeb ntawm kev lag luam thiab kev lag luam yas los ntawm cov hnab dej thiab cov khoom tiv thaiv. Txawm li cas los xij, ntau tus neeg tseem xav: Puas yog Eva zoo ib yam li yas? Dab tsi ua rau nws txawv?

Kab lus no muab kev nthuav dav dav ntawm yuav ua li cas ntawm EVA sib txawv ntawm kev ua yeeb yam hauv kev sib xyaw, cov qauv, pab koj nkag siab zoo rau lawv cov yam ntxwv thiab cov ntawv thov raug.

Cov khoom ntawm EVA yog dab tsi?

Eva, luv luv rau ethylene - vinyl acetate copolymer tsim los ntawm polymersizing ob tug monomers {- Nyob rau hauv kev kub siab. Nws cov qauv cim copolymer muab nws ob qho tib si yas- zoo li cov txheej txheem thiab roj hmab {5} zoo li yooj.

Lub Vinyl acetate (va) cov ntsiab lus nyob rau hauv eva tuaj yeem sib txawv ntawm 5% thiab 40%, thiab cov nyiaj no ncaj qha cuam tshuam rau cov khoom siv cov khoom:

• Qis va cov ntsiab lus (5-10%) → zoo li tsawg- ntom polyethylene (LDPE): nruj dua thiab tsis yooj yim dua
• Nruab Nrab VA cov ntsiab lus (10-20%) → sib npaug elasticity thiab pob tshab, haum rau cov khoom ntim thiab cov neeg siv khoom
• Siab dua va cov ntsiab lus (20-40%) → elastic thiab muag muag, zoo tagnrho rau cov khoom lag luam thiab khoom plig

 

Cov yam ntxwv tseem ceeb ntawm Eva:

• Lub teeb pwm thiab hloov tau
• Zoo heev waterproof thiab cuam tshuam cov khoom nqus
• Tus, cov ntaub so mos kom zoo ib yam li roj hmab ua npuas ncauj
• Yooj yim rau pwm thiab cov duab ua ntau hom ntawv
• Tiv taus kev tawg thiab tsawg kub

Cov Kev Siv Cov Ntawv Tso Cai Feem Pua: Cov Mountswear, Yoga Mats, Cov Kev Ua Si GACE, Cov Khoom Tiv Thaiv, thiab cov hnab ntoo dej lossis cov xwm txheej.

 

Dab tsi yog yas?

"Yas" yog ib lub sijhawm dav rau ib yim neeg ntawm cov khoom siv hluav taws xob ua tau los ntawm cov roj polymers los ntawm roj av lossis roj. Cov yas yog tsim los ntawm kev sib txuas cov khoom hluavtaws nrog cov khoom sib ntxiv xws li stabilizers, cov tshuab yas, thiab cov xim kom tau txais cov yam ntxwv tshwj xeeb.

 

Muaj ob lub ntsiab qeb:

• Thermoplastics - tuaj yeem rov qab kho dua tshiab thiab rov kho dua (piv txwv li, PP, PVC)
• Thermosetting dub - ib zaug moulded, tsis tuaj yeem rov qab (piv txwv li, epoxy, phenolic cob qhia)

 

Hom Yas:

• PE (Polyethylene): Lub teeb yuag, hloov tau yooj yim, siv dav hauv cov yeeb yaj kiab thiab ntim khoom
• PP (polypropylene): tawv, tshuaj lom neeg - tsis kam, siv hauv cov thawv ntim khoom thiab tsheb
• PVC (polyvinyl chloride): rigid lossis hloov tau, siv hauv cov kav dej, thiab hnab kom hniav kom zoo nkauj

 

Hauv essence, eva yog ib feem ntawm tsev neeg yas - nws yog daim ntawv tshwj xeeb ntawm cov yas nrog kev txhim kho elasticity thiab softness. Txawm li cas los xij, vim hais tias ntawm nws cov khoom sib txawv, nws feem ntau tau sib tham sib cais los ntawm cov pa uas muaj kev sib cais.

 

Qhov sib txawv tseem ceeb ntawm EVA thiab yas

Txawm hais tias Eva belongs rau tsev neeg yas, nws cov qauv molecular thiab ua rau lub cev kev coj ua ua rau nws sawv ntsug los ntawm cov ntaub ntawv ib txwm ua rau PE, lossis PVC.

Kev Sib Piv	Eva (Ethylene - vinyl acetate)	Raug plastics (PVC, PE, PP)
Cov Qauv Tshuaj	Copolymer ntawm ethylene thiab vinyl acetate	Homopolymers zoo li PE lossis PVC
Yooj yooj	Mos thiab ywj, roj hmab - zoo li kev ntxhib los mos	Ranges los ntawm saj zawg zog (PE) kom nruj (pvc)
Ntawj thiab Nyhav	Tsawg ntom ntom, heev lub cev yuag	Feem ntau hnyav dua
Rau pob tshab	Siab transparency (txawv los ntawm VA cov ntsiab lus)	PE yog translucent, PVC tuaj yeem muab tau pob tshab tag nrho
Kev nqus dej poob siab	Zoo heev Cushioning thiab rov ua dua	Txwv elasticity, tej zaum yuav deform mus tas li
Kev ntxhib deg	Matte lossis du nto	Feem ntau glossy lossis ci iab
Kev Kub	160-200 degree, yooj yim rau pwm	Feem ntau 180-230 degree
Ntxiv	Tsis - ua rau stabilizers, tsis muaj chlorine	Tej zaum muaj cov tshuab raj lossis chlorine sib txuas

Hauv cov ntsiab lus yooj yim, Eva tuaj yeem piav qhia raws li lub softer, ntau elastic version ntawm yas, thaum cov pa uas muaj ntau dua thiab muaj teeb meem. Qhov sib txawv no hauv kev hloov pauv tau yog feem ntau vim yog cov pab pawg vinyl acetate uas cuam tshuam nrog Eva's Molecular Crystallinity thiab ua rau elasticity.

 

Lub cev lub cev thiab kev sib piv ua tau zoo

Kev ua yeeb yam ntawm Eva thiab cov teeb pom kev sib txawv txawv thoob plaws ntau yam tsis muaj, cuam tshuam rau lawv cov khoom sib txawv.

1. Qiv thiab qhov hnyav

EVA ua npuas ncauj feem ntau muaj qhov qis dua (nyob ib ncig ntawm 0.95 g / cm³), tso cai rau nws kom ntab on lub plhaub thiab cov khoom waterproof. PVC, los ntawm kev sib piv, muaj qhov ntom ntom ntawm ib puag ncig 1.3-1.4 g / cm³, ua nws hnyav dua thiab tsis muaj buoyant.

2. Elastic thiab muag muag

EVA tus qauv sab hauv muab nws ua kom tau yooj yim thiab poob siab, ua rau nws zoo tagnrho rau cov ntaub ntawv cushioning xws li cov ntaub qhwv lossis tiv thaiv kev tiv thaiv. Kev tso quav uas zoo li pp lossis pvc muaj ntau nruj thiab tuaj yeem tsis muaj peev xwm nyob rau lub sijhawm, tshwj xeeb tshaj yog thaum raug rau qhov kub hloov.

3. Lub Neej

Thaum Eva muaj cov resilience zoo thiab tiv taus kev tawg, nws lub zog tensile yog feem ntau qis dua li ntawm PP lossis PVC. Cov plastics zoo li yuav tawm tsam kev tawm tsam hnav thiab tshuab kev ntxhov siab zoo dua, uas yog vim li cas lawv feem ntau siv nyob rau hauv cov thawv ntim khoom thiab cov qauv txheej txheem.

4. Huab cua thiab tshuaj lom neeg kuj

Eva pom zoo tsis kam rau noo noo, UV duab, thiab cov tshuaj me me, ua rau nws haum rau cov khoom sab nraum zoov thiab dej nyab. PVC, txawm hais tias ruaj khov, yuav nyuaj lossis discolor nyob rau hauv lub hnub ci ntsa iab. PE muab cov tshuaj ua tau zoo tab sis tsis muaj kev pheej hmoo.

5. Kev ua cov yam ntxwv

Eva tuaj yeem ua pwm nyob ntawm qhov chaw kub tsawg (160-200 degree) nrog ntau qhov chaw ua haujlwm dav. Nws tuaj yeem yooj yim tsim mus rau hauv cov duab nyuaj, uas yog vim li cas nws thiaj nyiam rau kev cai- moulded cov khoom zoo li cov dej tsis zoo li cov dej tsis zoo li cov quav dej, thiab ua npuas ncauj.

 

Cov rooj sib piv cov rooj

Ntiag tug	Yu	Pvc	Pe	Pp
Ntom ntom (g / cm³)	0.95	1.3–1.45	0.91–0.94	0.9
Hardness (Ntug Dej A / D)	60–95A	70–100D	40–50D	95–105D
Tensile lub zog (mpa)	10–25	10–60	8–20	30–40
Elongation (%)	300–800	20–400	100–650	100–600
Ua haujlwm Temp (degree)	-50~70	-15~60	-50~80	0~120

 

Cov ntawv thov tseem ceeb ntawm EVA thiab yas

Ob Eva thiab cov huab cua yog qhov tseem ceeb rau kev tsim khoom niaj hnub, txhua tus muaj zog haum rau cov kev xav tau tshwj xeeb.

Daim Ntawv Thov Teb	Daim Ntawv Thov EVA	Cov Ntawv Yas Siv
Nkawm khau & Kev Ua Si	Khau midsoles, yoga mats, tiv thaiv cov ntaub qhwv	PVC SOLES, PE Cov Kev Ntaus Ncaws Pob
Ntim	Saj zawg zog cov yeeb yaj kiab, lub taub hau ua npuas ncauj, ntim kaw	PE / PP hnab, cov thawv tawv
Kev Siv Siv	Cable Rwb thaiv tsev, Hnub ci encapsulation zaj duab xis, kub- yaj cov nplaum	Pvc Kav, PE Films
Cov Neeg Siv Khoom	Cov hnab ntoo dej, rooj plaub cia, khoom ua si	Cov thawv yas, Khoom Khoom Khoom

EVA feem ntau xaiv thaum cov khoom yuav tsum tau teeb ci ntsa iab, kev xav, thaum lub sij hawm cov plastic nyob twj ywm qhov twg rigidity tseem ceeb, durability yog qhov tseem ceeb.

 

Tag

Eva thiab yas yuav koom nrog tib tsev neeg, tab sis lawv cov yam ntxwv tau teeb tsa lawv sib nrug. Eva sawv tawm rau nws cov muag muag, elasticity, thiab versatility, thaum ib txwm muaj kev ua kom nruj rau hauv kev ruaj khov thiab cov qauv kev ruaj ntseg.

Nkag siab cov neeg tsim qauv no tso cai rau cov tsim qauv, cov neeg lag luam los xaiv cov khoom tsim nyog rau txhua cov khoom lag luam uas tsim nyog tshaj plaws, kev txiav txim siab tau muaj zog, lossis kev txiav txim siab tau muaj zog, lossis kev txiav txim siab tau muaj zog, lossis kev txiav txim siab tau txais txiaj ntsig.