Cov ntsiab lus ntawm txheej txheej rau cov 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 lub kiv cua siab (nrog rau lub siab ntawm 15-60kpa) rau hauv lub tshuab riam cua, muaj ob daim di ncauj stainless hlau rau saum thiab hauv qab ntawm rab riam cua. Lub nozzle nrog qhov sib txawv ntawm 0.4-1.2 hli txau tawm, tsim riam zoo li cua ntws. Nws tshuab ntawm ib lub kaum ntse ntse (feem ntau 40 degree ~ 45 degree) ntawm daim ntawv web, tshem 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 yog 2-8mm), lub kaum sab xis, cua riam cua siab, daim ntawv thauj ceev, thiab txheej viscosity. Qhov dav dav dav tuaj yeem ncav cuag 100-400m / min, txheej txheej 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 qub, tsis hais txog qhov sib txawv ntawm cov ntawv qub lossis qhov tsis sib xws, nws tuaj yeem ua tiav cov txheej txheem zoo thiab du, thiab ua haujlwm yooj yim; Cov txheej txheej loj yog qhov zoo rau kev txhim kho qhov zoo ntawm txheej txheej; Ua raws li cov kev cai sib txawv rau txheej viscosity. Vim lub zog tsis muaj 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 carton board, Carbonless copy paper, photographic paper, art leather paper, etc.
2. Impregnation txheej
Impregnation txheej txheej txheem yog txheej txheem ntawm impregnating thiab nqus cov tshuaj lom neeg xws li latex, resin, thiab roj rau hauv daim ntawv qub, ua kom cov ntawv ua tiav cov kev ua haujlwm tshwj xeeb xws li dej tsis qab, hluav taws kub, hnav-tiv taus, ntxiv dag zog, noo noo-pov thawj, thiab rwb thaiv tsev.
Cov impregnating agents siv rau impregnating Xubu mas muaj xws li hluavtaws resin, hluavtaws latex, polystyrene latex, roj, paraffin, thiab lwm yam. Lub hauv paus ntawv siv rau impregnating Xu daim ntaub yuav cog fiber ntau ntawv, inorganic fiber ntawv, hluavtaws fiber los yog hluavtaws ntawv. Txawm li cas los xij, tsis hais hom ntawv twg, yuav tsum 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 ntev fiber ntau ntoo pulp feem ntau siv ntau zaus. ② Cov ntawv hauv paus muaj qhov nqus tau zoo. Yog li ntawd, lub hauv paus ntawv tsis glued; Thiab qhov degree ntawm kev ntaus, nias, thiab polishing yog qhov tsawg.
Vim qhov sib txawv ntawm txhua tus neeg ua haujlwm impregnating, kev ua haujlwm thiab kev siv tom qab ua tiav sib txawv.
1) Resin impregnating tus neeg sawv cev
Hom impregnating no muaj xws li phenolic resin, melamine formaldehyde resin, formaldehyde resin, thiab lwm yam. Tom qab impregnation, daim ntawv muaj waterproof, roj resistant, hnav-resistant, rwb thaiv tsev thiab lwm yam khoom. Cov ntawv no yog 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. waterproof khoom; Phenolic resin muaj cov khoom zoo rwb thaiv tsev.
2) Latex impregnating tus neeg sawv cev
Cov hom impregnating agents muaj xws li styrene butadiene latex, chloroprene latex, thiab acrylic latex. Tom qab impregnation, lub zog sab hauv ntawm daim ntawv yog txhim kho los txhim kho nws cov hnav tsis kam. Piv txwv li, kev ruaj ntseg daim ntawv, ntoo veneer nplaum daim ntawv, thiab ntim thiab kho kom zoo nkauj daim ntawv.
3) Roj thiab paraffin impregnating tus neeg sawv cev
Hom impregnating no muaj xws li: roj qhuav (linseed roj, tung roj, thiab lwm yam), paraffin. Tom qab immersion nyob rau hauv cov roj, nws muaj dej tsis kam, noo noo tsis kam, siab zog, thiab transparency. Tom qab immersion nyob rau hauv paraffin, nws muaj dej tsis kam thiab opacity, thiab yog tsuas yog siv rau roj, dej, thiab noo noo resistant ntim ntawv.