Ihe anọ bụ isi kpatara akpa akpa ngwá ọrụ plastik EVA na-ada ada

Ekwenyere m na ọtụtụ ndị na-echegbu onwe ha maka nsogbu na-ada ada nke rọbaAkpa ngwá ọrụ Eva, ya mere, gịnị na-eme ka akpa ngwá ọrụ na-ada mbà? Mbelata nke ngwaahịa ndị nwere agba plastik metụtara nguzogide ọkụ, ikuku oxygen, nguzogide okpomọkụ, acid na alkali na-eguzogide pigmenti na agba agba, na njirimara nke resin eji. Ka anyị nyochaa ya nkenke n'okpuru.

1. Acid na alkali eguzogide Mbelata nke ngwaahịa rọba acha na-ejikọta na nguzogide kemịkalụ nke colorant (acid na alkali resistance, redox resistance).

Dịka ọmụmaatụ, molybdenum chromium red na-eguzogide ọgwụ acids, ma ọ na-enwe mmetụta nke alkali, na cadmium yellow adịghị eguzogide acid. Agba abụọ a na resin phenolic nwere mmetụta mbelata siri ike na ụfọdụ agba, na-emetụta oke nguzogide okpomọkụ na nguzogide ihu igwe nke ndị na-acha agba na-eme ka ọ daa.

2. Antioxidation: Ụfọdụ organic pigments ji nwayọọ nwayọọ na-ada n'ihi mmebi nke macromolecules ma ọ bụ ndị ọzọ mgbanwe mgbe oxidation.

Usoro a na-agụnye oke okpomọkụ oxidation n'oge nhazi na oxidation mgbe ị na-ezute oxidants siri ike (dị ka chromate na chromium odo). Mgbe agwakọtara ọdọ mmiri, pigmenti azo na chrome yellow, agba ọbara ọbara ga-eji nwayọọ nwayọọ na-ada.
3. Nkwụsi ike nke okpomọkụ nke pigmenti na-eguzogide okpomọkụ na-ezo aka n'ókè nke nkwụsị nke okpomọkụ, nkwụsịtụ, na nkwụsị nke pigmenti n'okpuru nhazi okpomọkụ.

Ihe mejupụtara pigmenti inorganic bụ nke metal oxides na salts, nke nwere ezigbo nkwụsi ike nke okpomọkụ na oke okpomọkụ. Pigments sitere na ogige ndị dị ndụ ga-enwe mgbanwe n'ụdị molekụla na obere ego nke ire ere na ụfọdụ okpomọkụ. Karịsịa maka ngwaahịa PP, PA na PET, nhazi okpomọkụ dị n'elu 280 ° C. Mgbe ị na-ahọrọ agba agba, n'otu aka ahụ, anyị ga-aṅa ntị na nguzogide okpomọkụ nke pigmenti, na n'aka nke ọzọ, anyị ga-atụle oge nkwụsị okpomọkụ nke pigmenti. Oge nguzogide okpomọkụ na-abụkarị 4-10 mmiri ozuzo. .

4. Lightfastness The lightfastness nke colorants ozugbo na-emetụta ebelata nke ngwaahịa.

Maka ngwaahịa ndị dị n'èzí nke na-ekpuchi ọkụ siri ike, ìhè ọkụ (sunfastness) nke agba agba ejiri mee ihe bụ ihe ngosi dị mkpa. Ọ bụrụ na ọkwa ọkụ adịghị mma, ngwaahịa ahụ ga-ada ngwa ngwa n'oge eji. Ọkwa nguzogide ọkụ ahọpụtara maka ngwaahịa na-eguzogide ihu igwe kwesịrị ịbụ ihe na-erughị ọkwa isii, ọ kachasị mma ịhọrọ ọkwa asaa ma ọ bụ asatọ. Maka ngwaahịa ime ụlọ, ọkwa anọ ma ọ bụ ise nwere ike ịhọrọ.

Nguzogide ọkụ nke resin na-ebu ibu nwekwara mmetụta dị ukwuu na mgbanwe agba. Mgbe ụzarị ultraviolet gbasasịrị resin ahụ, usoro mkpụrụ ndụ ya na-agbanwe, agba na-adakwa. Ịgbakwunye ọkụ stabilizers dị ka ultraviolet absorbers na masterbatch nwere ike imeziwanye nguzogide ọkụ nke agba na ngwaahịa plastik nwere agba.