Cov ntsiab lus ntawm txheej txheej ntawm daim ntawv txheej tshuab

1. Cua riam txheej
Hom txheej no yog siv dav tshaj plaws thiab muaj kev hloov pauv dav dav. Nws yog tshuab los ntawm cov kiv cua siab (cua siab 15 ~ 60kpa) thiab nkag mus rau hauv lub cev riam phom. Nws yog tsim los ntawm ob daim di ncauj stainless hlau nyob rau sab sauv thiab sab qis ntawm cov riam cua. Qhov sib txawv yog 0.4 ~ 1.2 hli thiab lub nozzle yog txau los tsim cov riam zoo li cua ntws. Nws tshuab ntawm ib lub kaum ntse ntse (feem ntau yog 40 degree ~ 45 degree) rau hauv daim ntawv web, tshuab tawm cov xim ntau dhau, thiab tshuab cov txheej txheej ntawm daim ntawv sib npaug.
Cov txheej txheej yog nyob ntawm qhov kev ncua deb ntawm rab riam cua thiab daim ntawv lub vev xaib (feem ntau 2 ~ 8mm), lub kaum sab xis, lub siab ntawm cov riam cua, daim ntawv thauj ceev thiab txheej viscosity. Feem ntau, lub tsheb ceev tuaj yeem ncav cuag 100-400m / min, txheej ntim yog 10-20g / m2, txheej viscosity yog 50-400mpa. a, thiab cov ntsiab lus khoom yog 30-50 feem pua ​​.
Nws qhov zoo: muaj zog yoog mus rau cov ntawv hauv paus, txawm tias qhov sib txawv ntawm cov ntawv hauv paus lossis qhov tsis sib xws, nws tuaj yeem ua rau cov txheej txheem sib xws, du thiab yooj yim rau kev khiav lag luam; Cov txheej txheej loj yog qhov zoo los txhim kho cov txheej txheej zoo; Ua raws li cov kev cai sib txawv ntawm txheej viscosity. Vim tias tsis muaj huab cua txaus lub zog ntawm cov riam cua, nws tsuas yog tsim nyog rau kev tsim cov txheej txheem nrog cov ntsiab lus tsis tshua muaj viscosity. Tsis tas li ntawd, cov cua kub siab ntawm cov riam cua yuav tsum tau ua kom huv.
Hom txheej lub taub hau no siv tau rau kev tsim cov ntawv coated printing art paper, coated paperboard, carbonless carbon paper, photographic paper, art paper, etc.
Me coater. jpg ib
2. Dip txheej
Cov txheej txheem txheej txheej impregnation yog ua kom cov ntawv hauv paus impregnate thiab nqus cov latex, resin, roj thiab lwm yam tshuaj, kom cov ntawv tuaj yeem tau txais kev ua haujlwm tshwj xeeb xws li dej tsis qab, hluav taws kub, hnav-tiv taus, kev txhawb zog, ya raws thiab rwb thaiv tsev.
Cov impregnating agents siv rau impregnating daim ntaub mas muaj xws li hluavtaws resin, hluavtaws latex, polystyrene latex, roj, paraffin, thiab lwm yam. Cov ntaub ntawv hauv paus siv rau impregnating Xu daim ntaub yuav cog fiber ntau daim ntawv, inorganic fiber ntawv, hluavtaws fiber los yog hluavtaws ntawv. Txawm li cas los xij, txawm tias daim ntawv zoo li cas, yuav tsum tau ua raws li cov cai hauv qab no: ① Daim ntawv hauv paus muaj lub zog ntub dej txaus los tiv thaiv cov ntawv tawg lossis tawg thaum lub sij hawm impregnation, yog li nws feem ntau siv fiber ntau ntoo pulp. ② Cov ntawv hauv paus muaj qhov nqus tau zoo. Yog li ntawd, lub hauv paus ntawv tsis loj; Thiab qhov degree ntawm kev ntaus, nias thiab polishing yog tsawg.
Vim qhov sib txawv ntawm txhua tus neeg ua haujlwm impregnating, cov khoom siv thiab kev siv tom qab ua haujlwm sib txawv.
1) Resin impregnant
Xws li impregnating agents muaj xws li phenolic resin, melamine formaldehyde resin, formaldehyde resin, thiab lwm yam. Tom qab impregnation, daim ntawv muaj waterproof, roj-pov thawj, hnav-resistant, rwb thaiv tsev thiab lwm yam khoom. Cov ntawv no tuaj yeem siv los ua cov ntawv dai kom zoo nkauj, laminated composite paper, hluav taws xob rwb thaiv tsev ntawv, ntxhua khaub ncaws daim ntawv lo, thiab lwm yam. khoom; Phenolic resin muaj rwb thaiv tsev zoo.
2) Latex impregnant
Cov tshuaj impregnating xws li styrene-butadiene latex, neoprene latex thiab acrylic latex. Tom qab impregnation, lub zog sab hauv ntawm daim ntawv yog txhim kho, thiab kev puas tsuaj ntawm daim ntawv yog txhim kho. Piv txwv li, daim ntawv tshwj xeeb rau kev ruaj ntseg, ntoo veneer khi daim ntawv thiab ntim thiab daim ntawv kho kom zoo nkauj.
3) Roj thiab paraffin impregnant
Xws li cov tshuaj impregnating muaj xws li cov roj qhuav (linseed roj, tung roj, thiab lwm yam) thiab paraffin. Tom qab roj impregnation, nws muaj dej tsis kam, noo noo tsis kam, siab zog thiab pob tshab. Tom qab paraffin impregnation, nws muaj dej tsis kam thiab opacity, thiab feem ntau yog siv rau roj-pov thawj, dej-resistant thiab noo-pov thawj ntim ntawv.