Yam dab tsi txiav txim siab qhov zoo ntawm lub hnab EVA?

Yam dab tsi txiav txim siab qhov zoo ntawm lub hnab EVA?

Raws li cov khoom ntim khoom, qhov zoo ntawmEVA hnabraug cuam tshuam los ntawm ntau yam. Nov yog qee yam tseem ceeb uas sib koom ua ke txiav txim siab zoo thiab ua haujlwm ntawm EVA hnab:

1. Cov khoom muaj pes tsawg leeg
Qhov zoo ntawm EVA hnab nyob ntawm seb nws cov khoom muaj pes tsawg leeg, tshwj xeeb tshaj yog cov ntsiab lus ntawm ethylene-vinyl acetate (VA). EVA yog cov khoom siv los ntawm copolymerization ntawm ethylene thiab vinyl acetate, thiab VA cov ntsiab lus feem ntau yog nruab nrab ntawm 5% thiab 40%. Tus nqi ntawm VA ncaj qha cuam tshuam rau kev ua haujlwm ntawm EVA hnab, xws li kev yoog raws, cuam tshuam tsis kam, pob tshab, thiab lwm yam.

2. Molecular qauv
Cov qauv molecular ntawm EVA kuj tseem muaj feem cuam tshuam rau qhov zoo. Tom qab qhov kev taw qhia ntawm vinyl acetate monomer rau hauv EVA molecular saw, lub siab crystallinity yog txo thiab lub toughness thiab cuam tshuam kuj zoo tuaj. Yog li ntawd, cov qauv molecular tsim ntawm EVA hnab yog qhov tseem ceeb rau lawv cov kev ua tau zoo.

3. Cov txheej txheem ntau lawm
Cov txheej txheem tsim khoom ntawm EVA hnab kuj yog ib qho tseem ceeb. Cov tuam txhab lag luam feem ntau siv cov txheej txheem kev ua haujlwm siab txuas ntxiv mus rau cov txheej txheem polymerization, suav nrog cov txheej txheem kettle thiab tubular txoj kev. Qhov sib txawv ntawm cov txheej txheem no yuav ua rau muaj qhov sib txawv ntawm kev ua haujlwm ntawm EVA cov khoom, xws li kev poob siab thiab kev laus ua haujlwm.

4. Kev ua thiab molding
EVA yog ib qho thermoplastic polymer uas siv tau rau ntau yam kev ua thiab molding txheej txheem xws li txhaj tshuaj molding, extrusion molding, thiab tshuab molding. EVA molding muaj qhov ua haujlwm qis (160-200 ℃), ntau yam, thiab pwm kub tsis tshua muaj (20-45 ℃). Cov kev ua haujlwm no yuav cuam tshuam qhov kawg ntawm EVA hnab.

5. Ceev thiab hardness
Qhov ceev ntawm lub hnab EVA feem ntau yog nyob nruab nrab ntawm 0.9-0.95 g / cm³, thiab qhov hardness feem ntau yog sim siv Shore A hardness, nrog rau cov hardness ntau ntawm 30-70. Cov kev ua tau zoo ntawm lub cev no yog cuam tshuam ncaj qha rau lub zog thiab kev ua haujlwm cushioning ntawm EVA hnab.

6. Kev ua haujlwm ib puag ncig
EVA hnab yuav tsum ua kom tau raws li qhov yuav tsum tau muaj kev tiv thaiv ib puag ncig, tsis muaj cov tshuaj phem, thiab ua raws li cov qauv thiab cov kev cai ib puag ncig. Ib puag ncig kev ua tau zoo yog qhov tseem ceeb uas cov neeg siv khoom niaj hnub no txhawj xeeb txog thaum xaiv cov khoom.

7. Tsim
Kev tsim lub hnab EVA kuj tseem cuam tshuam rau nws qhov zoo. Tsim muaj xws li kev xaiv ntawm fabrics, thickness thiab hardness ntawm EVA, thiab cov qauv tsim ntawm cov khoom. Kev tsim qauv zoo tuaj yeem txhim kho qhov ua tau zoo thiab zoo nkauj ntawm EVA hnab.

8. Compression kuj thiab poob siab tsis kam
EVA hnab yuav tsum muaj qee qhov compression tsis kam thiab poob siab los tiv thaiv cov khoom ntim los ntawm kev cuam tshuam sab nraud thiab extrusion

9. Dej tsis kam thiab corrosion kuj
Cov hnab EVA zoo yuav tsum muaj cov dej tsis zoo thiab tiv thaiv corrosion, thiab tuaj yeem tiv thaiv corrosion los ntawm seawater, roj, acid, alkali thiab lwm yam tshuaj.

Nyob rau hauv cov ntsiab lus, qhov zoo ntawm EVA hnab yog txiav txim los ntawm ntau yam xws li cov khoom muaj pes tsawg leeg, molecular qauv, txheej txheem ntau lawm, ua thiab molding, lub cev muaj zog, kev tiv thaiv ib puag ncig, tsim, compression kuj thiab poob siab kuj, raws li zoo raws li dej kuj thiab corrosion. tsis kam. Cov neeg tsim khoom yuav tsum xav txog cov xwm txheej no kom ua tiav los tsim cov hnab EVA zoo.