Kedu ihe na-ekpebi ogo nke akpa EVA?

Kedu ihe na-ekpebi ogo nke akpa EVA?

Dị ka ihe nkwakọ ngwaahịa nkịtị, àgwà nkeAkpa Evana-emetụta ọtụtụ ihe. Nke a bụ ụfọdụ isi ihe na-ejikọta ọnụ na-ekpebi ogo na arụmọrụ nke akpa EVA:

1. Ihe mejupụtara
Ogo nke akpa EVA na-adabere na mbụ na ihe mejupụtara ya, karịsịa ọdịnaya nke ethylene-vinyl acetate (VA). EVA bụ ihe emere site na copolymerization nke ethylene na vinyl acetate, yana ọdịnaya VA na-adịkarị n'etiti 5% na 40%. Ọnụ ego nke VA na-emetụta kpọmkwem arụmọrụ nke akpa EVA, dị ka mgbanwe, nkwụsị mmetụta, nghọta, wdg.

2. Ọdịdị molekụla
Ọdịdị molekụla nke EVA nwekwara mmetụta dị mkpa n'ịdị mma. Mgbe iwebata vinyl acetate monomer n'ime agbụ molecular EVA, kristal dị elu na-ebelata na ike na nguzogide mmetụta na-emeziwanye. Ya mere, nhazi ihe owuwu nke molekul nke akpa Eva dị mkpa maka ịrụ ọrụ ha.

3. Usoro mmepụta
Usoro mmepụta nke akpa EVA bụkwa ihe dị mkpa. Ọtụtụ ụlọ ọrụ na-eji usoro polymerization nnukwu nrụgide na-aga n'ihu, gụnyere usoro kettle na usoro tubular. Ọdịiche dị na usoro ndị a ga-eduga n'iche dị na arụmọrụ nke ngwaahịa EVA, dị ka nguzogide ujo na nkwụsị ịka nká.

4. Nhazi na ịkpụzi
EVA bụ polymer thermoplastic nke enwere ike iji mee ihe maka nhazi na nhazi usoro dị iche iche dị ka ịkpụzi injection, ịkpụzi extrusion, na ịkpụzi ihe. EVA ịkpụzi nwere obere nhazi okpomọkụ (160-200 ℃), a obosara nso, na a ala ebu okpomọkụ (20-45 ℃). Ọnọdụ nhazi ndị a ga-emetụta àgwà ikpeazụ nke akpa EVA.

5. Njupụta na ike
Njupụta nke akpa EVA na-adịkarị n'etiti 0.9-0.95 g/cm³, a na-anwale ike ike ya site na iji Shore A hardness, yana oke ike nke 30-70. Paragraf arụmọrụ anụ ahụ ndị a na-emetụta kpọmkwem na ike na arụmọrụ nke akpa EVA.

6. Environment arụmọrụ
Akpa EVA kwesịrị izute ihe nchekwa gburugburu ebe obibi chọrọ, enweghị ihe na-emerụ ahụ, ma soro ụkpụrụ na ụkpụrụ gburugburu ebe obibi dị mkpa. Ịrụ ọrụ gburugburu ebe obibi bụ ihe ndị na-azụ ahịa nke oge a na-enwewanye nchegbu mgbe ị na-ahọrọ ngwaahịa.

7. Nhazi
Nhazi nke akpa EVA ga-emetụtakwa àgwà ya. Nhazi gụnyere nhọrọ nke akwa, ọkpụrụkpụ na ike nke Eva, na nhazi nhazi nke ngwaahịa. Ezi nhazi nwere ike imeziwanye ihe bara uru na ihe ịchọ mma nke akpa EVA.

8. Mkpakọ eguzogide na ujo iguzogide
Akpa EVA kwesịrị inwe ụfọdụ mgbochi mkpakọ na nguzogide ujo iji chebe ihe ekpokọtara site na mmetụta mpụga na extrusion

9. Mmiri na-eguzogide na corrosion eguzogide
Akpa EVA dị elu kwesịrị inwe ezigbo nguzogide mmiri na nguzogide corrosion, ma nwee ike iguzogide corrosion sitere na mmiri mmiri, griiz, acid, alkali na chemicals ndị ọzọ.

Na nchịkọta, a na-ekpebi àgwà nke akpa EVA site n'ọtụtụ ihe dị ka ihe mejupụtara ihe onwunwe, usoro ihe omimi, usoro mmepụta, nhazi na ịkpụzi, ihe anụ ahụ, ọrụ nchebe gburugburu ebe obibi, imewe, mkpakọ mkpakọ na ujo na-eguzogide, yana mmiri na-eguzogide na corrosion. iguzogide. Ndị na-emepụta kwesịrị ịtụle ihe ndị a n'ụzọ zuru ezu iji mepụta akpa EVA dị elu.