Daim ntawv puas yog ua los ntawm cellulose?

Daim ntawv puas yog ua los ntawm cellulose?

daim ntawv feem ntau yog ua los ntawmcellulosecov fibers, uas yog los ntawm cov khoom siv cog xws li ntoo pulp, paj rwb, lossis lwm yam nroj tsuag fibrous. Cov cellulose fibers no raug ua tiav thiab tsim ua cov ntawv nyias nyias los ntawm ntau yam kev kho tshuab thiab tshuaj lom neeg. Cov txheej txheem feem ntau pib nrog kev sau cov ntoo lossis lwm yam nroj tsuag uas muaj cov cellulose ntau. Tom qab ntawd, cov cellulose raug rho tawm los ntawm ntau txoj kev xws li pulping, qhov twg cov ntoo lossis cov nroj tsuag raug rhuav tshem mus rau hauv pulp los ntawm kev siv tshuab lossis tshuaj lom neeg.

Thaum tau txais cov pulp, nws yuav raug ua kom tiav ntxiv kom tshem tawm cov khoom tsis huv xws li lignin thiab hemicellulose, uas tuaj yeem ua rau daim ntawv tsis muaj zog thiab ua rau muaj xim tsis zoo. Kev siv tshuaj dawb kuj tseem siv tau los ua kom cov pulp dawb thiab txhim kho nws qhov ci. Tom qab ntxuav, cov pulp raug sib xyaw nrog dej los ua cov slurry, uas tom qab ntawd nthuav rau ntawm lub vijtsam hlau mesh kom ntws cov dej ntau dhau thiab tsim cov lev nyias nyias ntawm cov fibers. Cov lev no tom qab ntawd raug nias thiab ziab kom ua cov ntawv.

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Cellulose tseem ceeb heev rau cov txheej txheem ua ntawv vim nws cov yam ntxwv tshwj xeeb. Nws muab lub zog thiab kev ruaj khov rau daim ntawv thaum tseem ua rau nws yooj ywm thiab sib dua. Tsis tas li ntawd, cov fibers cellulose muaj kev sib raug zoo rau dej, uas pab daim ntawv nqus cov kua mem thiab lwm yam kua yam tsis yaj.

Thaumcelluloseyog cov khoom tseem ceeb ntawm daim ntawv, lwm yam khoom ntxiv yuav raug ntxiv rau hauv cov txheej txheem ua ntawv kom txhim kho cov yam ntxwv tshwj xeeb. Piv txwv li, cov khoom sau xws li av nplaum lossis calcium carbonate yuav raug ntxiv los txhim kho qhov opacity thiab du, thaum cov neeg sawv cev loj xws li hmoov txhuv nplej siab lossis cov tshuaj tsim khoom yuav raug siv los tswj daim ntawv qhov nqus thiab txhim kho nws txoj kev tiv thaiv dej thiab kua mem.


Lub sijhawm tshaj tawm: Plaub Hlis-22-2024