Kev puas tsuaj acidic nyob rau hauv Sulfur -Dyeing ntawm Denim

Qhov no yog tus qhua tshaj tawm los ntawm Harry Mercer. Nws luv luv bio yog muab hauv qab no ncej.

Dyeing ntawm denim yarns thiab fabrics nrogsulfur dub tau nthuav qhia ntau yam teeb meemuas cuam tshuam rau cov nyiaj tau los ntawm cov ntaub ntawv nrog rau qhov zoo thiab kev ua haujlwm ntawm cov ris tsho dub. Cov teeb meem muaj xws li:

Dye pov tseg (feem ntau 50% lossis ntau dua hauv kev ntxuav tom qab dyeing

Xim variation tom qab garment laundering

Kev ua haujlwm qis qis dua nrog cov xov dub

Tiv tauj cov kab mob dermatitis thiab lwm yam. Tag nrho cov teeb meem no tau raug daws yav dhau los, hmoov tsis zoo, kev txawj ntse hauv kev siv cov sulfur dub tau ploj zuj zus mus rau ntau xyoo dhau los.

Ib qho teeb meem kho tau yooj yim tshaj plaws yog muaj feem xyuam rau cov kua qaub- puas tsuaj rau cov xov dub thiab cov ntaub, uas tshwm sim los ntawm kev tsim cov sulfur-raws li cov kua qaub, tejzaum nws yog sulfuric acid. Qhov no tshwm sim thaum pH ntawm cov dub - cov paj rwb dyed tsawg dhau los ua cov kua qaub no ua ntej lawv tuaj yeem tua cov cellulose saw ntawm paj rwb fibers.Sulfur dub- cov ntaub ntawv dyed yog qhov txawv ntawm qhov lawv yuav tsum muaj pH ntawm ib ncig ntawm 11,tom qab dyeing thiab ua ntej paj rwb qhuav. Yog tias qis dua, cov kua qaub uas tsim tawm yuav ua rau cov ntaub npuag qis dua los yog cov xov paj ntau dua - tus nqi tawg thaum lub sij hawm xaws.

Kev puas tsuaj tshwm sim los ntawm Tshuaj Oxidation ntawm Sulfur Black

Sulfur dyes yog nyob rau hauv chav kawm ntawm dyes hu ua “vatsâ€. Vat dyes yog insoluble nyob rau hauv dej thiab tsis tuaj yeem nqa los ntawm dej mus rau hauv fibers kom txog thaum ua dej -soluble. Solubility ntawm vat dyes xav kom lawv ua ntej chemically txo. Cov dye txo qis nkag mus rau hauv fiber ntau uas nws yuav tsum tau oxidized los tsim cov xim tsis muaj kuab lom. Ib zaug ua insoluble dua, cov xim yog mechanically trapped hauv fiber.

Cov tshuaj oxidation ntawm cov xim sulfur feem ntau tuaj yeem ua nrog cov neeg ua haujlwm xws li hydrogen peroxide lossis sodium bromate. Tshuaj oxidation ntawm cov dyes yuav tsum tau ua nyob rau hauv ib tug tsawg pH (4.5-5.5), uas yuav tsum tau kom muaj ib tug acid. Rau cov xim sulfur uas tsis yog xim dub, suav nrog greys, xim av, xiav, violets, zaub ntsuab, turquoises thiab lwm yam, acidic tshuaj oxidation yog tsim nyog los tsim cov xim ci, zoo ib yam thiab xim nrawm.

Sulfur dub yog qhov tshwj xeeb tseem ceeb rau qhov no. Raws li txoj cai, sulfur dub yuav tsum tsis txhob raug oxidized. Muaj 2 qhov laj thawj rau qhov no:

Ua ntej, txo qis pH ntawm cov sulfur dub nrog cov kua qaub yuav ua rau muaj kev ywj pheej ntawm kev muaj zog, sulfuric - hom kua qaub uas yuav tawm tsam cov paj rwb cellulose.

Qhov thib ob, yog tias sulfur dub dyes ncaj qha hu rau cov kua qaub ncaj qha, yuav muaj kev tso tawm cov roj hydrogen sulfide txaus ntshai.

Qhov no tshwm sim feem ntau ntawm cov xov paj tsis tu ncua lossis cov ntaub dyeing tshuab siv rau denim. Cov dej hauv lub thawv ntxuav tom qab dyeing ua hnyav hnyav nrog sulfur dye, uas feem ntau nqa mus rau hauv lub thawv acidic oxidation ua rau cov tshuaj tiv thaiv uas tso pa tawm.

Muaj ib txoj cai - ntawm - ntiv tes xoo hais txog qhov yooj yim npaum li cas cov vat dye tuaj yeem oxidized:Yog hais tias cov xim yog ib qho yooj yim los txo, nws yog ib qho nyuaj rau oxidize; conversely, yog tias nyuaj los txo, yooj yim rau oxidize. Sulfur dub xav tau qhov kub thiab txias (85-90ËšC) kom txo qis, thaum tag nrho lwm cov xim sulfur tuaj yeem txo qis thiab siv rau qhov kub qis li 30ËšC.

Txij li thaum lawv tsis yooj yim los txo, sulfur dub tuaj yeem nkag oxidized los ntawm atmospheric oxygen, tib yam li Indigo, piv txwv li, los ntawm kev hla cov xov paj lossis ntaub los ntawm huab cua. Yog hais tias lub sij hawm nruab nrab ntawm lub thawv dyeing thiab 1st ntxuav yog txaus kom cia cov paj rwb kub kom txias rau 40ËšC, oxidation yuav ua tiav. Kev ntxuav thawj zaug yuav tsum tau ua nrog dej txias lossis dej sov txij li kev ntxuav kub yuav txhawb nqa rov qab - txo cov xim, ua rau cov xim tsis tsim nyog thiab xim tsis sib xws.

Oxidation ntawm Sulfur Blacks hauv Batch Equipment

Nyob rau hauv sulfur dub dyeing nyob rau hauv batch txheej txheem, huab cua oxidation yuav ua tau rau cov sulfur dub tom qab tso cov dye da dej thiab circulating ntaub los ntawm huab cua ua ntej ntxuav. Nyob rau hauv pob dyeing khoom, ib tug compressed cua kab tuaj yeem ntsia tau uas yog siv los quab yuam huab cua los ntawm sab hauv ntawm cov xov paj mus rau sab nraud. Hauv cov tshuab tsoos tsho, cov cua oxidation tsis sib xws yog qhov nyuaj thiab cov tshuaj oxidation ntawm sulfur dub yuav yog tib txoj kev xaiv.Txawm li cas los xij, hydrogen peroxide yuav tsum tsis txhob siv rau cov sulfur dub, qhov no yuav ua rau poob xim.. Qhov no yog tej zaum vim hais tias lub loj loj sulfur dub molecule tau tawg mus rau hauv luv luv units los ntawm peroxides uas muaj tsawg tsis kam mus ntxuav. Yog tias cov tshuaj oxidation yog tsim nyog, ces yuav tsum tau siv cov oxidizer me me xws li sodium bromate. Tom qab oxidation, cov sulfur dub dyed khoom yuav tsum tau buffered rau pH ntawm 11.

Ib qho kev kuaj xyuas zoo ntawm qhov muaj peev xwm poob hauv kev cia yog AATCC Test Method #26:

Kev laus ntawm Sulfur-Dyed Textiles: Accelerated

Ib tug sulfur dub-dyed qauv ntawm cov ntaub los yog xov paj yog muab tso rau hauv ib lub chamber uas nws raug tshav kub thiab av noo thiab qhuav. Cov khoom raug tso cai rau tus mob thiab raug sim txhawm rau txhawm rau txiav txim siab lub zog poob tom qab kev laus. Txoj kev tuaj yeem pom tau yooj yim los ntawm kev tso ib qho qauv rau hauv qhov yuam kev -dav qhov cub nrog txog 500 ccâ € ™ s dej thiab tshem nws li 30 feeb tom qab tag nrho cov dej evaporated.

Nov yog tus qhua tuaj ntawm Harry Mercer.Mr. Mercer muaj 30 xyoo dhau los hauv kev lag luam denim suav nrog 3 lub tuam txhab denim tseem ceeb hauv Asmeskas.Tsis tas li ntawd, los ntawm kev ua tus thawj coj hauv chav kuaj ntawm American Association of Textile Colorists thiab Chemists (1986-1989, nws yog tus kws tshaj lij colorist rau kev ntsuas thiab xim sib xws nrog rau kev kuaj textile.