Kuv ntseeg tias ntau tus neeg txhawj xeeb txog qhov teeb meem ntawm cov yas fadingEVA cov cuab yeej, yog li dab tsi ua rau lub hnab ntim khoom ploj mus? Lub fading ntawm cov khoom xim yas muaj feem xyuam rau lub teeb tsis kam, oxygen tsis kam, kub tsis kam, acid thiab alkali tsis kam ntawm pigments thiab dyes, thiab cov khoom ntawm cov resin siv. Cia peb piav qhia luv luv hauv qab no.
1. Acid thiab alkali tsis kam Lub fading ntawm cov khoom yas xim muaj feem xyuam rau cov tshuaj tiv thaiv ntawm cov xim (acid thiab alkali tsis kam, redox kuj).
Piv txwv li, molybdenum chromium liab yog resistant rau dilute acids, tab sis rhiab heev rau alkali, thiab cadmium daj tsis acid-resistant. Ob lub pigments thiab phenolic resin muaj zog txo cov nyhuv ntawm qee cov xim, cuam tshuam rau cov cua sov thiab huab cua tsis kam ntawm cov xim thiab ua rau fading.
2. Antioxidation: Qee cov organic pigments maj mam ploj mus vim degradation ntawm macromolecules los yog lwm yam kev hloov tom qab oxidation.
Cov txheej txheem no suav nrog kev kub siab oxidation thaum ua thiab oxidation thaum ntsib cov oxidants muaj zog (xws li chromate hauv chromium daj). Thaum cov pas dej, azo pigments thiab chrome daj sib xyaw, cov xim liab yuav maj mam ploj mus.
3. Thermal stability ntawm tshav kub-resistant pigments yog hais txog cov degree ntawm thermal poob, discoloration, thiab fading ntawm cov xim nyob rau hauv ua kub.
Inorganic pigments yog tsim los ntawm cov hlau oxides thiab ntsev, uas muaj thermal stability thiab siab kub. Pigments ua los ntawm cov organic tebchaw yuav raug hloov pauv hauv cov qauv molecular thiab ib qho me me ntawm decomposition ntawm qhov kub thiab txias. Tshwj xeeb tshaj yog rau PP, PA, thiab PET cov khoom, qhov kub ua haujlwm siab tshaj 280 ° C. Thaum xaiv cov xim, ntawm ib sab, peb yuav tsum tau them sai sai rau lub tshav kub tsis kam ntawm cov xim, thiab ntawm qhov tod tes, peb yuav tsum xav txog lub sij hawm thaum tshav kub kub ntawm cov xim. Lub sijhawm tiv thaiv tshav kub feem ntau yog 4-10 los nag. .
4. Lightfastness Lub lightfastness ntawm colorants ncaj qha cuam tshuam rau fading ntawm cov khoom.
Rau cov khoom siv sab nraum zoov uas raug rau lub teeb muaj zog, qhov lightfastness (sunfastness) theem ntawm cov xim uas siv yog ib qho tseem ceeb qhia. Yog hais tias lub lightfastness theem tsis zoo, cov khoom yuav ploj sai sai thaum siv. Qib tiv thaiv lub teeb xaiv rau cov khoom siv tiv thaiv huab cua yuav tsum tsis pub tsawg dua qib rau, thiab nws yog qhov zoo tshaj plaws xaiv qib xya lossis yim. Rau cov khoom siv sab hauv tsev, qib plaub lossis tsib tuaj yeem xaiv.
Lub teeb tsis kam ntawm cov cab kuj tseem muaj kev cuam tshuam zoo rau kev hloov xim. Tom qab cov resin yog irradiated los ntawm ultraviolet rays, nws cov qauv molecular hloov thiab xim ploj. Ntxiv lub teeb stabilizers xws li ultraviolet absorbers rau cov masterbatch tuaj yeem txhim kho lub teeb tsis kam ntawm cov xim thiab cov khoom yas xim.
Post lub sij hawm: Jul-05-2024