ECF elemental chlorine-free bleaching process for bamboo tissue

Re na le nalane e telele ea ho etsa pampiri ea bamboo Chaena. Bamboo fiber morphology le sebopeho sa lik'hemik'hale li ikhethile. Karolelano ea bolelele ba fiber e telele, 'me microstructure ea fiber cell lebota e khethehile. Ts'ebetso ea nts'etsopele ea matla nakong ea pulping e ntle, e fana ka makhasi a bleached optical opacity e phahameng le coefficient ea ho hasanya leseli. Likahare tsa lignin tsa thepa e tala ea bamboo (hoo e ka bang 23% -32%) li phahame, e leng se khethollang tekanyo e phahameng ea alkali le tekanyo ea sulfidation nakong ea ho phunya le ho pheha (tekanyo ea sulfidation hangata ke 20% -25%), e leng haufi le lehong la coniferous. Likahare tse phahameng tsa hemicellulose le silicon tsa thepa e tala le tsona li tlisa mathata a itseng ts'ebetsong e tloaelehileng ea ho hlatsuoa ha makhasi le mouoane o motšo oa joala le sistimi ea lisebelisoa tsa mahloriso. Leha ho le joalo, thepa e tala ea bamboo e ntse e le thepa e ntle ea ho etsa pampiri.

Sistimi ea ho soeufatsa ea limela tse kholo le tse mahareng tse phuntsang lik'hemik'hale tsa bamboo ha e le hantle e tla amohela ts'ebetso ea TCF kapa ECF ea ho soeufatsa. Ha re bua ka kakaretso, ho sebelisoa theknoloji ea TCF kapa ECF ea bleaching e tebileng le ho hlakisa oksijene ea pulping. Ho ipapisitse le palo ea methati ea ho fifala, makhasi a bamboo a ka fifala ho isa ho 88% -90% ho khanya.

Litholoana tsa rona tse soeufalitsoeng tsa bamboo li soeufalitsoe ka ECF (elemental chlorine free), e nang le tahlehelo e fokolang ea ho soeufala holim'a makhasi a bamboo le viscosity e phahameng ea pulp, hangata e fihlang ho feta 800ml/g. Li-tissue tsa bamboo tse soeufalitsoeng tsa ECF li na le boleng bo holimo ba makhasi, li sebelisa lik'hemik'hale tse fokolang, 'me li sebetsa hantle haholo. Ka nako e ts'oanang, tsamaiso ea lisebelisoa e hōlile 'me ts'ebetso ea ts'ebetso e tsitsitse.

Mehato ea ts'ebetso ea ECF elemental chlorine-free bleaching ea bamboo tissues ke: pele, oksijene (02) e kenngoa ka tora ea oxidation bakeng sa oxidative delignification, ebe D0 bleaching-washing-Eop extraction-washing-D1 bleaching-washing e etsoa ka tatellano ka mor'a ho hlatsoa. Lik'hemik'hale tse ka sehloohong tsa ho hloekisa lik'hemik'hale ke CI02 (chlorine dioxide), NaOH (sodium hydroxide), H202 (hydrogen peroxide), joalo-joalo Qetellong, makhasi a bleached a thehoa ke khatello ea metsi. Bosoeu ba lesela la bamboo le soeufalitsoeng bo ka fihla ho feta 80%.