Nkag siab txog Fabric Safety Levels: Phau Ntawv Qhia A, B, thiab C Class Fabrics

Hauv cov neeg siv khoom lag luam niaj hnub no, kev nyab xeeb ntawm textiles yog qhov tseem ceeb, tshwj xeeb tshaj yog rau cov khoom lag luam uas tuaj yeem tiv tauj ncaj qha rau ntawm daim tawv nqaij. Fabrics tau muab faib ua peb theem kev nyab xeeb: Chav A, Chav B, thiab Chav C, txhua tus muaj cov yam ntxwv sib txawv thiab pom zoo siv.

**Class A Fabrics** sawv cev rau tus qauv kev nyab xeeb siab tshaj plaws thiab yog tsim los rau cov khoom me nyuam mos. Cov no suav nrog cov khoom xws li cov pawm, ris tsho hauv qab, bibs, pajamas, thiab txaj pw. Class A fabrics yuav tsum ua raws li cov kev cai nruj, nrog formaldehyde cov ntsiab lus tsis pub tshaj 20 mg / kg. Lawv yog cov dawb los ntawm carcinogenic aromatic amine dyes thiab hnyav hlau, ua kom cov tawv nqaij tsawg heev. Tsis tas li ntawd, cov ntaub no tuav pH qib ze rau nruab nrab thiab pom cov xim nrawm nrawm, ua rau lawv muaj kev nyab xeeb rau cov tawv nqaij rhiab heev.

**Class B Fabrics** haum rau cov neeg laus hnav txhua hnub, suav nrog lub tsho, T-shirts, tiab, thiab ris. Cov ntaub no muaj kev nyab xeeb nruab nrab, nrog cov ntsiab lus formaldehyde capped ntawm 75 mg / kg. Thaum lawv tsis muaj cov carcinogens paub, lawv cov pH yuav txawv me ntsis ntawm qhov nruab nrab. Class B fabrics yog tsim los ua kom tau raws li cov qauv kev nyab xeeb, muab cov xim zoo nrawm thiab kev nplij siab rau kev siv txhua hnub.

**Class C Fabrics**, ntawm qhov tod tes, yog npaj rau cov khoom uas tsis ncaj qha rau ntawm daim tawv nqaij, xws li cov tsho loj thiab cov ntaub. Cov ntaub no muaj kev nyab xeeb qis dua, nrog cov qib formaldehyde ua tau raws li cov qauv yooj yim. Txawm hais tias lawv tuaj yeem muaj cov tshuaj me me, lawv nyob hauv qhov txwv kev nyab xeeb. Cov pH ntawm Class C fabrics kuj yuav txawv ntawm qhov nruab nrab, tab sis lawv tsis xav tias yuav ua rau muaj kev phom sij loj. Xim ceev yog qhov nruab nrab, thiab qee qhov fading yuav tshwm sim dhau sijhawm.

Kev nkag siab txog cov txheej txheem kev nyab xeeb ntawm cov ntaub no yog qhov tseem ceeb rau cov neeg siv khoom, tshwj xeeb tshaj yog thaum xaiv cov khoom rau cov menyuam mos los yog cov tawv nqaij rhiab heev. Los ntawm kev ceeb toom, cov neeg yuav khoom tuaj yeem xaiv kev nyab xeeb dua uas ua rau muaj kev noj qab haus huv thiab kev noj qab nyob zoo.