Ndinotenda kuti vanhu vazhinji vari kushushikana zvakanyanya nedambudziko riri kupera repurasitikiEVA mabhegi emidziyo, saka chii chinoita kuti masaga emudziyo apere? Kupera kwezvigadzirwa zvine mavara epurasitiki kune hukama nekuramba kwechiedza, kuramba kweokisijeni, kupisa kupisa, asidhi uye alkali kuramba kwepigment uye dhayi, uye zvimiro zveresin inoshandiswa. Ngationgororei muchidimbu pazasi.
1. Acid uye alkali kuramba Kupera kwezvigadzirwa zvepurasitiki zvine mavara kune hukama nemakemikari kuramba emuvara (asidhi uye alkali resistance, redox resistance).
Semuyenzaniso, molybdenum chromium tsvuku inoshingirira kudilute acids, asi inonzwa kune alkali, uye cadmium yellow haidziviriri acid. Aya ma pigment maviri uye phenolic resin ane simba rekudzikisira pane mamwe mavara, anokanganisa zvakanyanya kupisa kwekupisa uye kuramba kwemamiriro ekunze kwemavara uye kukonzera kupera.
2. Antioxidation: Mimwe organic pigments zvishoma nezvishoma inopera nekuda kwekuora kwema macromolecules kana dzimwe shanduko mushure mekuita oxidation.
Kuita uku kunosanganisira kukwirisa-tembiricha oxidation panguva yekugadzirisa uye oxidation paunosangana nemaoxidants akasimba (akadai sechromate muchromium yellow). Kana madziva, azo pigments uye chrome yero zvakasanganiswa, iro dzvuku rinopera zvishoma nezvishoma.
3. Kugadzikana kwekupisa kwemavara anodzivirira kupisa kunoreva chiyero chekudzikira kwehuremu, kushanduka kwemavara, uye kupera kwe pigment pasi pekugadzirisa tembiricha.
Inorganic pigments inoumbwa nesimbi oxides uye munyu, iyo ine yakanaka kugadzikana kwekupisa uye yakanyanya kupisa kusamira. Pigment akagadzirwa kubva kuorganic compounds anozochinja mune molecular chimiro uye diki yekuora pane imwe tembiricha. Kunyanya yePP, PA, uye PET zvigadzirwa, tembiricha yekugadzira iri pamusoro pe280 ° C. Pakusarudza mavara, kune rumwe rutivi, tinofanira kubhadhara kupisa kwepigment, uye kune rumwe rutivi, tinofanira kufunga nezvekudzivirira kupisa nguva ye pigment. Nguva yekudzivirira kupisa inowanzova 4-10mvura. .
4. Lightfastness Kureruka kwemavara kunokanganisa zvakananga kupera kwezvigadzirwa.
Kune zvigadzirwa zvekunze zvinoratidzwa nechiedza chakasimba, iyo lightfastness (sunfastness) nhanho yemuvara wakashandiswa chiratidzo chakakosha. Kana iyo lightfastness level yakashata, chigadzirwa chinopera nekukurumidza panguva yekushandiswa. Chiyero chekupikisa giredhi chakasarudzwa kune zvigadzirwa zvinodzivirira mamiriro ekunze hachifanirwe kunge chiri pasi penhanho yechitanhatu, uye zviri nani kusarudza nhanho yechinomwe kana masere. Kune zvigadzirwa zvemukati, nhanho yechina kana shanu inogona kusarudzwa.
Kupikisa kwechiedza chekutakura resin kunewo simba guru pakuchinja kwemavara. Mushure mokunge resin yakavhenekerwa nemirairo ye ultraviolet, chimiro chayo che molecular inoshanduka uye ruvara runopera. Kuwedzera mwenje inogadzika senge ultraviolet absorbers kune masterbatch inogona kuvandudza mwenje kuramba kwemavara uye emavara epurasitiki zvigadzirwa.
Nguva yekutumira: Jul-05-2024