Tsarin bleaching na asali na ECF na chlorine don ƙwayar bamboo

Muna da dogon tarihi na yin takarda bamboo a kasar Sin. Bamboo fiber ilimin halittar jiki da kuma sinadaran abun da ke ciki na musamman. Matsakaicin tsayin fiber yana da tsayi, kuma ƙirar bangon fiber cell microstructure na musamman ne. Ƙarfin haɓaka aikin haɓakawa yayin jujjuyawar yana da kyau, yana ba da ɓangaren litattafan almara mai kyau kyawawan kaddarorin gani na babban opacity da ƙarancin watsa haske. Abubuwan da ke cikin lignin na albarkatun bamboo (kimanin 23% -32%) yana da girma, wanda ke ƙayyade adadin alkali mai girma da digiri na sulfidation yayin pulping da dafa abinci (digiri na sulfidation gabaɗaya 20% -25%), wanda ke kusa da itacen coniferous . Babban hemicellulose da abun ciki na siliki na kayan albarkatun kuma yana kawo wasu matsaloli ga aikin yau da kullun na wankin ɓangaren litattafan almara da ƙafewar barasa da tsarin kayan aiki. Duk da haka, albarkatun bamboo har yanzu suna da kyau don yin takarda.

Tsarin bleaching na tsire-tsire masu girma da matsakaici na sinadarai na bamboo za su rungumi tsarin TCF ko ECF. Gabaɗaya magana, haɗe tare da ƙaddamarwa mai zurfi da ƙarancin iskar oxygen na pulping, ana amfani da fasahar bleaching TCF ko ECF. Dangane da adadin matakan bleaching, ƙwayar bamboo za a iya bleached zuwa 88% -90% haske.

Tsuntsayen ɓangaren litattafan almara na bamboo ɗinmu duk an goge su da ECF (kyauta na chlorine), wanda ke da ƙarancin asarar bleaching akan ɓangaren bamboo da ɗan ɗanƙon ɓangaren litattafan almara, gabaɗaya ya kai sama da 800ml/g. ECF bleached bamboo tissues suna da mafi kyawun ɓangaren litattafan almara, suna amfani da ƙarancin sinadarai, kuma suna da ingantaccen aikin bleaching. A lokaci guda, tsarin kayan aiki ya balaga kuma aikin aiki yana da kwanciyar hankali.

Matakan aikin ECF na bleaching-free chlorine na bamboo kyallen su ne: na farko, ana shigar da iskar oxygen (02) a cikin hasumiya na iskar oxygen don lalata iskar oxygen, sannan D0 bleaching-washing-Eop cirewa-washing-D1 bleaching-washing. a jere bayan wanka. Babban sinadaran bleaching sune CI02 (chlorine dioxide), NaOH (sodium hydroxide), H202 (hydrogen peroxide), da sauransu. A ƙarshe, ɓangaren litattafan almara yana samuwa ta hanyar rashin ruwa. Farin naman bamboo mai bleaked na iya kaiwa sama da 80%.