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, tse bontšang 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.

Mokhoa oa ho soeufatsa oa limela tsa bamboo tse kholo le tse mahareng tsa lik'hemik'hale li tla amohela mokhoa oa ho soeufatsa oa TCF kapa ECF. 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: ea pele, oksijene (02) e kenngoa ka tora ea oxidation bakeng sa oxidative delignification, ebe D0 bleaching-washing-Eop extraction-washing-D1 bleaching-washing ea etsoa. ka tatellano ka mora ho hlatsuwa. 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 makhasi a bamboo a soeufalitsoeng bo ka fihla ho feta 80%.