Cov nyhuv ntawm cov dej-res resenant tus neeg saib xyuas ntawm cov khoom ntawm txheej thiab coated ntawv

Nrog rau kev loj hlob sai ntawm cov ntawv kev lag luam, tshwj xeeb tshaj yog cov ntawv sau sai, cov luam ntawv kev lag luam ntawm cov ntawv sau ua tau zoo dua thiab siab dua. Txhawm rau kom paub meej tias luam tawm zoo, cov npoo ntawm coated ntawv yuav tsum muaj lub peev xwm tiv thaiv cov av ntub. Ntub kev txhuam yog hais txog kev puas tsuaj rau saum npoo ntawm daim ntawv thiab daim duab qhia chaw muaj peev xwm ua kom muaj kev sib txhuam tsis ntub dej Cov.

Thiab rau cov ntawv sau dej nrog cov ntaub ntawv tshwj xeeb, nyob rau hauv cov txheej txheem ntau lawm, hauv cov txheej txheem dej ua haujlwm hauv cov neeg sawv cev ntawm sizing thiab sizing nto moo yog Txhawm rau ntxiv cov dej tsis kam ntxiv hauv cov txheej txheem txheej txheej npaj, kom cov txheej txheej txheej txheej kom tau txais cov tshuaj pleev kom zoo.

Nyob rau tib lub sijhawm, raws li kev txiav txim siab ntawm kev tiv thaiv kev nyab xeeb thiab kev xav tau ntawm cov ntawv qhwv cov ntaub ntawv thiab tam sim no yog kev siv ntawm polyureece formin (Papu) dej tshuaj. Papu yog siv dav, vim tias nws tsis muaj formalteDehyde, thiab nws tseem ua haujlwm tau zoo thaum nws tau ua tiav cov ntawv yoog raws li cov txheej txheem luam ntawv.

Papu muaj cov ntawv thov muaj zog rau papu, thiab viscosity ntawm Papu ntxiv rau cov xim yog ruaj khov thiab kho kom nrawm nrawm. Pape molecular saw muaj chloroethanol pab pawg thiab polyamine pab pawg, cov xim pleev xim rau cov pab pawg ua ke, cov xim sib xyaw ua ke los tsim lub network ntawm kev kho cov yeeb yaj kiab, uas yog lub hauv paus tseem ceeb ntawm papu dej tsis kam, tab sis kuj yog ib coating dej tiv taus tus neeg ua haujlwm.

Hauv kev siv tiag tiag, Papu tsis tuaj yeem tsuas yog tsim cov tshuaj lom neeg nrog coated starch, tab sis kuj txhuam cov kua txiv, thiab cov txhuam hniav ntub dej tsis kam ntawm cov txheej muaj zog ntxiv. Tsis tas li ntawd, cov khoom siv tsis muaj zog cationic ntawm Papu Cov Dej Resistant nrog Action, txhim kho txheej txheej txheej txheej txheej txheem ntawm cov ntawv luam tawm tas li.

Rheological cov cuab yeej yog qhov taw qhia tseem ceeb ntawm cov xim, Papu Hom Dej Tiv Thaiv Tom qab cov xim poob ntawm cov xim txo qis, dej khaws cia yog qhov zoo dua. Papu Hom Dej Tiv Thaiv yog tsim nyog rau kev npaj ntawm siab viscosity, thiab cov dej ua tiav kev ua tau zoo ntawm cov xim zoo dua.