Polyvinyl Alcohol (PVA) ua haujlwm feem ntau yog tus neeg saib xyuas qhov loj me, pigment binder, thiab daim ntawv ntxiv dag zog hauv kev lag luam papermaking, siv los txhim kho lub cev lub cev, luam tawm, thiab zoo nkauj ntawm daim ntawv.
Surface Sizing Agent
Thaum siv cov tshuaj PVA rau ntawm daim ntawv, nws tsim cov yeeb yaj kiab uas muaj txiaj ntsig zoo hauv qab no:
Printability: Enhances ink receptivity thiab absorption, yog li txo cov luam ntawv tsis meej pem los yog number case los ntshav.
Smoothness thiab Gloss: Sau cov voids ntawm fibers, ua rau daim ntawv nto smoother thiab txhim kho nws qhov muag pom kev.
Abrasion Resistance: Txo qhov hnav ntawm qhov chaw thaum lub sij hawm luam ntawv, ua rau nws zoo tagnrho rau cov ntawv thov xws li siab -kawg kos duab albums thiab daim ntawv lo.
Pigment Binder
Hauv kev tsim cov ntawv coated, PVA ua haujlwm raws li kev khi rau cov xim (xws li calcium carbonate thiab kaolin av nplaum), ua haujlwm hauv qab no:
Enhanced Coating Adhesion: Ua kom cov pigments ua raws li cov ntawv hauv paus, yog li txo cov txheej txheej detachment lossis flaking.
Txhim kho Durability: Txhim kho daim ntawv folding endurance thiab tsim kua muag, yog li txuas nws lub neej kev pab cuam.
Paper Strengthening Agent
PVA txhawb nqa cov qauv ntawv los ntawm cov txheej txheem hauv qab no:
Fiber Bonding: Cov ntaub ntawv hydrogen bonds nrog cellulose fibers, yog li ua rau daim ntawv lub zog tensile thiab tawg lub zog.
Dej Resistance: Ib nrab hydrolyzed PVA qib (xws li PVA 17-88) tuaj yeem txhim kho daim ntawv ruaj khov thiab kev ncaj ncees hauv qhov chaw ntub dej.