Kev sib xyaw thiab melting ntawm kwv yees li 2.5 kg ntawm EVA valve- kaw lub hnab ntim nrog 1 tuj kub- yaj txheej cuam tshuam rau lub zog compressive, iav hlaws adhesion, tawg tsis kam, thiab huab cua tsis kam ntawm cov cim txheej. Cov hauv qab no yog kev sib cais ntawm txhua qhov teebmeem:
1. Kev cuam tshuam ntawm Compressive Strength (ntawm 60 degree)
JT/T280-2022 yuav tsum muaj lub zog compressive Ntau dua lossis sib npaug rau 2MPa ntawm 60℃. High-compressive-lub zog kub-kua txheej yog qhov ua rau tawg. Ntxiv cov hnab ntim tau hloov pauv tau zoo heev txhim kho qhov tawg tsis kam ntawm txheej.
Cov nyhuv softening ntawm EVA saj zawg zog zaj duab xis hnab: Nrog ib tug tsawg melting point, nws khaws ib co yooj txawm nyob rau ntawm -20 degree, txo lub zuag qhia tag nrho rigidity ntawm kub-melt txheej.
Txo Compressive Strength: Cov tsoos kub- cov txheej txheem yaj (petroleum resin + muab tub lim) muaj qhov rigidity siab (Ntau dua lossis sib npaug ntawm 2MPa) ntawm 60 degree, tab sis ntxiv 40 ob npaug - txheej valve- cov hnab ntim zaj duab xis txhim kho qhov yooj yim ntawm cov cim txheej.
2. Kev cuam tshuam rau iav hlaws Adhesion
Cov nplaum ntxiv dag zog ntawm EVA lub hnab hloov tau yooj yim:
Txhim kho yaj wettability: Cov zaj duab xis hloov tau zoo tom qab melting, uas tuaj yeem ua kom zoo dua cov iav hlaws thiab txhim kho lub zog nplaum.
Elastic cushioning txo detachment: Lub siab elongation ntawm kev tawg ntawm lub hnab ntim zaj duab xis tso cai rau nws deform elastically nyob rau hauv cov tsheb thauj khoom, txo qhov kev pheej hmoo ntawm iav hlaws dai vim muaj kev cuam tshuam.
Cov txiaj ntsig zoo:
Nce iav hlaws adhesion tus nqi: Qhov cuam tshuam tsis kam ntawm cov iav hlaws yog txhim kho, ncua kev lwj ntawm retroreflective brightness coefficient ntawm txoj kev cim.
Txhim kho lub sij hawm ntev - lub sij hawm durability: siab dua iav hlaws tuav tus nqi nyob rau hauv dynamic loads, ncua lub sij hawm reflective ntawm txoj kev cim.
3. Kev cuam tshuam rau kev tawg tsis kam
Cov nyhuv toughening ntawm lub hnab ntim zaj duab xis hloov tau:
Txhim khu kev nyuaj siab dispersion muaj peev xwm: Qhov siab elongation ntawm ob - txheej txheej zaj duab xis hloov tau yooj yim tso cai rau nws nqus cov kev ntxhov siab los ntawm txoj kev shrinkage los yog tsheb co, txo cov kab nrib pleb.
Txhim kho qis-kub tawg tiv thaiv: Hauv qab -20 degree, ob chav- txheej txheej zaj duab xis yooj yim lub hnab tseem tuav tau yooj yim, txo qhov kev pheej hmoo ntawm qhov kub thiab txias brittleness.
Cov txiaj ntsig tiag
Txo Cov Cracking Rate ntawm Kub Kub Tshiab- Cov Cim Qhuav: Muab piv rau cov roj av ntshiab, qhov ua rau tawg tuaj yeem raug txo los ntawm 30%-50%.
Txo Microcracks: Cov cim saum npoo yog smoother, txo cov teeb meem tev tawm los ntawm cov kab nrib pleb.
4. Kev cuam tshuam rau txheej txheej huab cua tsis kam
Huab cua Resistance yam ntxwv ntawm ob - Txheej Flexible Film Bags
UV Resistance: Ob chav - txheej txheej cov hnab ntim khoom siv tau hloov pauv nrog EVA +, uas tuaj yeem txo cov xim daj thiab chalking ntawm cov cim txheej hauv qab - lub sij hawm ultraviolet hluav taws xob.
Damp Heat Resistance: Ob chav - txheej txheej zaj duab xis hloov tau yooj yim lub hnab muaj qhov nqus dej tsis tshua muaj, tab sis nws qhov ntev - lub sijhawm ua haujlwm tsis cuam tshuam rau qhov kub thiab txias ib puag ncig.
Cov txiaj ntsig tiag
Hloov EVA Ob Chav -Txheej Txheej Zaj Duab Xis Lub Hnab (nrog ntxiv los tiv thaiv- cov neeg ua haujlwm laus): Huab cua tiv thaiv lub neej tuaj yeem txuas ntxiv mus rau ntau dua 5 xyoos.
5. Cov ntsiab lus ntawm qhov cuam tshuam tag nrho
Qhov sib ntxiv ntawm EVA zaj duab xis- qib ntim hnab (40 hnab, kwv yees li 2.5 kg ntawm cov nplaum yooj yim ntxiv rau 1 tuj xim) txo cov nkig ntawm kub- cov cim yaj thiab txhim kho cov iav hlaws adhesion, tawg tsis kam, qis- kub toughness, thiab huab cua tsis kam.
Zaj duab xis-qib ob- txheej EVA valve-cov hnab ntim tau yooj yim tuaj yeem yog qhov kev daws teeb meem zoo rau kev txhim kho tag nrho cov kev ua tau zoo ntawm kub- cov cim yaj.
