Cov ntawv luam tawm tsis tshua muaj qhov hnyav, tsis tshua muaj xim dawb thiab cov khoom zoo, nrog rau kev ua tiav ntawm cov tshuab tsim khoom, cov ntawv luam tawm maj mam siv rau xim luam ntawv;coated ntawv yog coated rau saum npoo ntawm daim ntawv, uas muaj siab smoothness, siab whiteness thiab siab gloss, luam ntawv xim yog ci, cov khaubncaws sab nraud povtseg yog ntshiab, thiab nws yog feem ntau siv rau cov luam ntawv ntawm cov khoom zoo; cov coated dawb board yog txheej txheej ntawm lub rooj tsavxwm dawb, uas muaj qhov zoo smoothness, zoo gloss thiab siab tawv, thiab feem ntau yog siv rau cov khoom ntim. Muaj qhov sib txawv ntawm lub cev xws li smoothness, gloss, ink absorption, whiteness, thiab bulk ntawm peb daim ntawv no.
Tom qab kev sim, cov ntawv luam tawm muaj qhov zoo tshaj plaws, qhov qis tshaj plaws dawb, qhov siab tshaj plaws PPS roughness, qhov tsis zoo gloss, thiab qis tshaj opacity; tusdaim ntawv kos duab muaj qhov nruj tshaj plaws, qhov siab tshaj plaws whiteness, qis tshaj PPS roughness, qhov zoo tshaj plaws gloss, thiab opacity. Siab; Coated white paperboard muaj ntau zoo dua, siab dawb, tsawg PPS roughness thiab zoo dua gloss. Lub pulp rau kev tsim cov ntawv xov xwm yog cov khoom siv tshuab, uas khaws cov lignin kom ntau li ntau tau thaum lub sij hawm tsim cov txheej txheem, uas tsis tshua muaj xim dawb thiab cov khoom zoo, tab sis cov ntawv xov xwm muaj qhov hnyav thiab tsis tshua pom zoo piv rau cov ntawv coated. Cov ntawv coated thiab cov ntawv dawb yog coated nrog cov xim rau ntawm daim ntawv hauv paus, thiab cov xim hauv cov txheej ua rau cov kev nyuaj siab tsis sib xws ntawm daim ntawv. Tom qab calendering thiab ua tiav, cov xim pigment yog teem rau hauv ib qho kev taw qhia, uas txo cov roughness ntawm daim ntawv coated thiab dawb board PPS thiab ua rau kom smoothness. Txij li qhov gloss feem ntau yog nyob ntawm qhov smoothness ntawm daim ntawv saum npoo, qhov ci ntawm daim ntawv (board) yog nyob rau hauv qhov kev txiav txim ntawm qhov roughness ntawm PPS, uas yog, coated ntawv> dawb cardboard> ntawv xov xwm.
Kev luam ntawv gloss yog cuam tshuam los ntawm qhov smoothness ntawm daim ntawv saum npoo thiab tus cwj mem nqus dej ua haujlwm. Daim ntawv txheej tuaj yeem txhim kho kev luam ntawv gloss ntawm daim ntawv. Qhov saum npoo ntawm cov ntawv xov xwm yog ntxhib thiab muaj tus cwj mem zoo nqus. Lub tshuab luam ntawv gloss tsuas yog 17.6%, thiab lub ntsej muag du ntawm lubcoated art daim ntawv yog siab. , Tus number case nqus yog nruab nrab, lub tshuab luam ntawv gloss yog 86.6%, thiab luam ntawv gloss ntawm cov coated dawb board yog 82.4%.
Cov ntaub ntawv nrog tus cwj mem nqus nqus, thiab siab dua gloss, tsim cov xim saturated tshaj plaws. Ib daim ntawv matte uas yog 100% absorbent yuav luam cov xim tsis zoo. Daim ntawv saum npoo ntawm cov ntawv coated yog qhov siab tshaj plaws, ua raws li cov ntawv coated dawb, thiab cov ntawv saum npoo ntawm cov ntawv luam tawm yog qhov qis tshaj. Tsim nyog txo tus cwj mem nqus ntawm cov ntawv luam tawm thiab txo PPS roughness ntawm cov ntawv luam tawm yuav pab txhim kho nws cov ntawv ua haujlwm.
Post lub sij hawm: Aug-29-2022