Kutheni ilaphu lijika libe tyheli?Indlela yokuthintela?

Izinto ezibangela ukuba iimpahla zibe tyheli

1.Ifoto etyheli

Ifoto etyheli ibhekisa kumthubi womphezulu weempahla ezilukiweyo ezibangelwa kukuqhekeka kwemolekyuli oxidation ngenxa yokukhanya kwelanga okanye ukukhanya kweultraviolet.Ifoto etyheli ixhaphake kakhulu kwiimpahla ezinombala okhanyayo, amalaphu amhlophe kunye namalaphu amhlophe.Emva kokuba ilaphu libonakaliswe ekukhanyeni, amandla okukhanya adluliselwa kwiilaphuIdayi, ekhokelela ekuqhekekeni kwedayi yemizimba edityanisiweyo emva koko ibangele ukufiphala kokukhanya kunye nelaphu libe tyheli.Phakathi kwazo, ukukhanya okubonakalayo kunye nokukhanya kwe-ultraviolet zezona zinto ziphambili ngokulandelelana zibangela ukuncipha kwedayi ye-azo kunye nedayi ye-phthalocyanine.

2.Phenolic yellowing

I-Phenolic yellowing ngokubanzi kukuba i-NOX kunye ne-phenolic compounds uqhagamshelwano kunye nokudluliselwa kwaye kubangele ukutyheli komhlaba welaphu.Into ephambili esebenzayo idla ngokuba yi-antioxidants equlethwe kwizinto zokupakisha, ezifana ne-butyl phenol (BHT).Emva kokushiya umzi-mveliso, iimpahla kunye nezihlangu ziya kuba phantsi kwexesha elide lokupakishwa kunye nokuthutha.Ngoko i-BHT kwizinto zokupakisha ziya kusabela nge-NOX emoyeni, ekhokelela ekubeni phuzi.

3.Oxidation yellowing

I-oxidation yellowing ibhekiselele ekubeni tyheli okubangelwa kukuphuma kwamalaphu nge-atmosfera okanye ezinye izinto.Iingubo ze-textile zidla ngokusetyenziswa iidayi zokunciphisa okanyeabancedisiekudayeni nasekugqibeni.Emva kokuba badibane neegesi ze-oxidizing, kuya kubakho ukuncitshiswa kwe-oxidation kwaye kubangele ukuphuzi.

4.I-arhente emhlophe etyheli

Ukutyheli kwearhente emhlophe kwenzeka ikakhulu kumalaphu anombala okhanyayo.Xa i-ejenti eshiyekileyo emhlophe kwindawo yempahla ifuduka ngenxa yokugcinwa kwexesha elide, iya kukhokelela kwi-arhente emhlophe yendawo kunye nempahla ephuzi.

5.I-arhente yokuthambisa ityheli

I-cationic ions kwii-softening axiliaries ezisetyenziswe kwinkqubo yokugqiba isambatho iya kuba yi-oxidized xa iphantsi kokushisa, ukukhanya kunye nezinye iimeko.Oko kubangela ukuba iindawo ezithambileyo zelaphu zibe tyheli.

 Nangona i-yellowing ihlulwe kwiintlobo ezintlanu ezikhankanywe ngasentla, ekusebenziseni ngokwenene, i-yellowing phenomenon yempahla idla ngokubangelwa zizizathu ezahlukeneyo.

Indlela yokuthintela iimpahla ezityheli?

1.Kwinkqubo yokuvelisa, amashishini kufuneka azame ukunciphisa ukusetyenziswa kwe-agent emhlophe, ephantsi kunomgangatho omhlophe we-whitening agent.

2.Kwilungiselelo kwinkqubo yokugqiba, iqondo lokushisa akufanele libe phezulu kakhulu.Ubushushu obuphezulu uya kwenza iidayi okanye abancedisi phezu komphezulu ilaphu kwenzeke oxidation ukuqhekeka, kwaye ke kubangele ilaphu yellowing.

3.Kwinkqubo yokupakisha, ukugcinwa kunye nokuthutha, kufuneka kusetyenziswe izinto zokupakisha nge-BHT ephantsi.Kwaye indawo yokugcina kunye nokuthutha kufuneka igcinwe kwiqondo lokushisa eliqhelekileyo kwaye ifakwe umoya kangangoko kunokwenzeka ukuphepha i-phenolic yellowing.

4. Kwimeko ye-phenolic yellowing yempahla ye-textile ngenxa yokupakishwa, ukuze kuncitshiswe ilahleko, inani elithile le-powder yokunciphisa lingahlakazeka phantsi kwepakethe kunye nebhokisi kufuneka litywinwe kwi-1 ukuya kwiintsuku ze-2, emva koko livulwe. kwaye ibekwe iiyure ezi-6.Emva kokuba ivumba lihamba, iimpahlainokuphinda ipakishwe.Ngoko ke i-yellowing ingalungiswa ukuya kwinqanaba eliphezulu.

5.Ekunxibeni kwemihla ngemihla, abantu kufuneka banikele ingqalelo ekugcinweni, bahlambe rhoqo kwaye ngobunono kwaye baphephe ukuvezwa kwexesha elide.

Ihoseyili 44133 iAnti Phenolic etyheli yoMvelisi kunye noMboneleli |Intsha (textile-chem.com)