Yellowing, inozivikanwawo se "yellowing", inoreva chiitiko chekuti pamusoro pezvinhu zvichena kana zvinyoro zvine mavara zvinoshanduka kutsvuka pasi pekuita kwekunze kwemamiriro akaita sechiedza, kupisa uye makemikari.Kana machira machena uye akadhayiwa ashanduka yero, chitarisiko chavo chichakuvadzwa uye hupenyu hwavo hwesevhisi huchadzikiswa zvakanyanya.Naizvozvo, tsvakiridzo pamusoro pezvinokonzeresa kutsvuka kwemachira uye matanho ekudzivirira kutsvuka kwave kuri imwe yenyaya dzinopisa kumba nekune dzimwe nyika.
Machira machena kana akareruka enaironi uye elastic fiber uye machira awo akasanganiswa anonyanya kuita yero.Yellowing inogona kuitika mukudhaya uye kupedzisa maitiro, inogonawo kuitika mukuchengetedza kana kurembera muchitoro hwindo, kana kunyangwe kumba.Pane zvikonzero zvakawanda zvinogona kukonzera yellowing.Semuenzaniso, iyo fiber pachayo inowanzoita yero (ine hukama), kana makemikari anoshandiswa pamucheka, senge asara emafuta uye anonyorovesa agent (kemikari ine chekuita).
Kazhinji, kumwe kuongorora kunodiwa kuti uzive chikonzero cheyero, maitiro ekuseta mamiriro ekugadzirisa, ndeapi makemikari anofanirwa kushandiswa kana chete makemikari anogona kushandiswa, uye ndezvipi zvinhu zvinokonzeresa kupindirana kweyero, pamwe nekurongedza uye kuchengetedza. zvemachira.
Isu tinonyanya kutarisa pakupisa kwakanyanya kutsvuka uye kuchengetedza yellowing yenylon, polyester fiber uye elastic fiber yakasanganiswa machira, akadai seLycra, dorlastan, spandex, nezvimwe.
Zvikonzero zvejira yellowing
Kudzima gasi:
——NOx flue gasi yemuchina wekuyera
——NOx flue gasi panguva yekuchengetedza
——Kuratidzwa kweOzone
Tembiricha:
——Kupisa kukuru
——Kufa kwekushisa kwepamusoro
—-Kunyorovesa uye kupisa kwakanyanya
Packaging&Kuchengeta:
—- Phenol uye amine zvine chekuita nechiedza chezuva (chiedza):
——Kupera kwedhayi uye fluorescein
——Kuderera kwefibers
Micro-organisms:
——Kukuvadzwa nemabhakitiriya uye chakuvhe
Zvakasiyana:
——Hukama pakati pekunyorovesa nefluorescein
Source kuongororwa kwematambudziko uye Countermeasures
Setting machine
Kune akati wandei akasiyana emhando yekuseta michina inoshandiswa muindasitiri yemachira, kusanganisira ayo anodziya zvakananga nekupisa gasi neoiri kana kupiswa zvisina kunanga nemafuta anopisa.Mukana wekuumba wekupisa kupisa uchabudisa zvakanyanya kukuvadza NOx, nokuti mhepo inopisa inosangana zvakananga negasi rinopisa uye mafuta emafuta;Nepo muchina wekugadzika unopisa nemafuta anopisa hausanganise gasi rinopisa nemhepo inopisa inoshandiswa kuseta jira.
Kuti udzivise iyo yakawandisa NOx inogadzirwa neyakananga yekudziya yekuisa muchina panguva yekupisa-yepamusoro yekumisikidza maitiro, isu tinogona kazhinji kushandisa yedu spanscor kuibvisa.
Utsi huri kupera uye kuchengetedza
Mamwe mafiber uye zvimwe zvekurongedza, zvakaita sepurasitiki, furo uye mapepa akadzokororwa, anowedzerwa ne phenolic antioxidants panguva yekugadziriswa kwezvinhu izvi zvekubatsira, senge BHT (butylated hydrogen toluene).Aya ma antioxidants achaita neNOx fumes muzvitoro uye matura, uye aya NOx fumes anobva mukusvibiswa kwemhepo (kusanganisira kusvibiswa kwemhepo kunokonzerwa netraffic, semuenzaniso).
Tinogona: kutanga, kudzivirira kushandiswa kwekutakura zvinhu zvine BHT;chechipiri, ita pH kukosha kwejira kuderera kupfuura 6 (fiber inogona kushandiswa kuita neutralize acid), iyo inogona kudzivirira dambudziko iri.Uye zvakare, anti phenol yellowing kurapwa kunoitwa mukudhaya uye kupedzisa maitiro kudzivirira dambudziko re phenol yellowing.
Ozone inopera
Ozone kupera kunonyanya kuitika muindasitiri yezvipfeko, nekuti mamwe manyoro anokonzeresa kutsvuka kwejira nekuda kweozone.Special anti ozone softeners inogona kuderedza dambudziko iri.
Kunyanya, cationic amino aliphatic softeners uye mamwe amine modified silikan softeners (yakawanda nitrogen content) zvinonzwa zvakanyanya kuhigh tembiricha oxidation, nokudaro zvichiita kuti yellow.Kusarudzwa kwezvinyoro uye zvigumisiro zvekupedzisira zvinodiwa zvinofanira kunyatsotariswa nekuomeswa nekupedza mamiriro ekuderedza kuitika kweyero.
kupisa kwakanyanya
Kana machira akafumurwa kune tembiricha yakakwira, inoshanduka yero nekuda kweiyo oxidation yefiber, iyo fiber uye inotenderera lubricant, uye jira risina kuchena pane fiber.Mamwe matambudziko ekuyero anogona kuitika kana uchidzvanya machira e-synthetic fiber, kunyanya zvipfeko zvemukati zvevakadzi zvemukati (senge PA / El bras).Zvimwe zvigadzirwa zve anti yellowing zvinobatsira zvikuru kukunda matambudziko akadai.
Kurongedza zvinhu
Hukama huri pakati pegasi rine nitrogen oxide uye kutsvuka panguva yekuchengetera kwave kuratidzwa.Nzira yechinyakare ndeyekugadzirisa iyo yekupedzisira pH kukosha kwejira pakati pe5.5 ne6.0, nekuti yero panguva yekuchengetedza inongoitika pasi pekusarerekera kune alkaline mamiriro.Yero yakadaro inogona kusimbiswa nekugezwa kweasidhi nekuda kwekuti iyo yero inopera pasi pemamiriro e acidic.Anti phenol yellowing yemakambani akaita seClariant neTona anogona kudzivirira zvinobudirira kuitika kweyakachengetwa phenol yellowing.
Kutsvuka uku kunonyanya kukonzerwa nekusanganiswa kwe phenol ine zvinhu zvakaita se (BHT) uye NOx kubva mukusvibiswa kwemweya kugadzira zvinhu zvinotsvuka.BHT inogona kunge iripo mumabhegi epurasitiki, makatoni emapepa akadzokororwa, glue, nezvimwewo zvikwama zvepurasitiki zvisina BHT zvinogona kushandiswa zvakanyanya sezvinobvira kuderedza matambudziko akadaro.
chiedza chezuva
Kazhinji kutaura, fluorescent whitening agents vane low light fastness.Kana machira ekuchena efluorescent akaiswa kuchiedza chezuva kwenguva yakareba, anozoshanduka kutsvuka zvishoma nezvishoma.Inokurudzirwa kushandisa fluorescent whitening agents ane high light fastness kumachira ane high quality zvinodiwa.Chiedza chezuva, sechitubu chesimba, chichaderedza faibha;Girazi haigone kusefa ese ultraviolet mwaranzi (masaisai emwenje ari pasi pe320 nm chete anogona kusefa).Nylon ifaibha inonyanya kuita yero, kunyanya iyo semi gloss kana matte fiber ine pigment.Iyi mhando ye photooxidation inokonzeresa yero uye kurasikirwa kwesimba.Kana iyo fiber iine hunyoro hwepamusoro, dambudziko rinonyanya kuoma.
microorganism
Mould uye mabhakitiriya zvinogona kukonzera kutsvuka kwejira, kunyangwe kusvibiswa kwebrown kana dema.Mould uye mabhakitiriya zvinoda chikafu kuti chikure, senge asara organic makemikari (senge organic acids, leveling agents, uye surfactants) pajira.Humid nharaunda uye ambient tembiricha inomhanyisa kukura kwema microorganisms.
Zvimwe zvikonzero
Cationic softeners inopindirana neanionic fluorescent brighteners kuderedza kuchena kwemachira.Chiyero chekudzikisa chinodyidzana nemhando yekunyorovesa uye mukana wekubata maatomu enitrogen.Kufurira kwepH kukosha kwakakoshawo, asi yakasimba asidhi mamiriro anofanira kudzivirirwa.Kana iyo pH yejira yakaderera pane pH 5.0, iyo hue yefluorescent whitening agent ichaitawo girini.Kana jira richifanirwa kunge riri pasi pemamiriro e acidic kudzivirira phenol yellowing, yakakodzera fluorescent inopenya inofanira kusarudzwa.
Phenol yellowing bvunzo (aidida nzira)
Pane zvikonzero zvakawanda zve phenol yellowing, pakati peiyo chikonzero chakakosha ndeye antioxidant inoshandiswa mukurongedza zvinhu.Muzviitiko zvakawanda, kuvharirwa phenolic compounds (BHT) inoshandiswa se antioxidant yekutakura zvinhu.Panguva yekuchengetera, BHT uye nitrogen oxides mumhepo ichaita yero 2,6-di-tert-butyl-1,4-quinone methide, chinova chimwe chezvikonzero zvingangove zvekuchengetedza yellowing.
Nguva yekutumira: Aug-31-2022