Koj puas tuaj yeem qhia qhov txawv ntawm cellophane thiab fiberglass ntawv?

1) Fiberglass ntawv

Fiberglass ntawvyog ib daim ntawv muaj kev lag luam, feem ntau yog siv los ua cov khoom siv lim dej, suab- cov khoom nqus dej, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob. Nws yog ib daim ntawv ua los ntawm cov iav fibers zoo, muaj cov nplaim hluav taws kub, muaj zog tshuaj lom neeg, thiab zoo qhov ntev.

Cov txheej txheem tsim ntawm daim ntawv no txawv me ntsis los ntawm kev ua ntawv zoo tib yam. Nws siv 100% iav fiber ntau (tsuas yog silica, nrog ib txoj kab uas hla tsawg dua 0.3-0.5 μm), maj mam pulped, nrog ntxiv ntawm cov nplaum, los yog qee zaum ib feem ntawm cov tshuaj ntoo pulp, thiab tsim rau ntawm ib lub tshuab plaub los yog lub tog raj kheej ntawv. Silica gel lossis colloidal alumina kuj tuaj yeem muab ntxiv los txhim kho lub zog ntawm daim ntawv tiav.

Cov txheej txheem ntawm cov ntawv iav fiber ntau (los yog iav fiber ntau cua lim ntawv) yog qhov yooj yim dua li cov txheej txheem papermaking. Qhov no yog vim iav fibers tsis tas yuav pulping, tsuas yog dispersion. Tsis tas li ntawd, nias tsis tas yuav tsum tau ua thaum ua ntawv, txo cov kauj ruam thiab txuag lub zog.

Cov txheej txheem ntws yog raws li nram no: Cov iav fiber ntau → Dispersion → Slurry cia tank → Slurry twj tso kua mis → Pre- slurry tank → Slurry txias tank → Slurry txias tank → Slurry flushing tank → Slurry twj tso kua mis → Slurry stabilizing tank → Headbox → Hlau packing l

2) Cellophane

Cellophane yog ib lub pob tshab, glossy regenerated cellulose zaj duab xis, yav tas los hu ua celluloid, ib tug transliteration ntawm lus Askiv lo lus "cellophane." Nws yog ib hom ntawv siv rau cov khoom ntim khoom, uas yog nyob rau hauv qeb ntawm cov ntawv ntim. Nco ntsoov tias tseem muaj ib lo lus hu ua "celluloid," uas tsis yog ntawv tab sis yog ib hom nitrocellulose yas (cov khoom siv raw ua ping- pong balls). Celluloid yog transliteration ntawm lus Askiv lo lus "celluloid." Ob leeg yuav tsum tsis txhob totaub.

Cellophane lub hauv paus hnyav yog feem ntau 30-60 g / m². Nws muaj nyob rau hauv daim ntawv thiab yob. Nws feem ntau yog xim tsis muaj xim, pob tshab, du, nyias daim ntawv, tsis muaj pores, impermeable rau huab cua, roj, thiab dej; nws muaj ib tug tej℃ntawm nruj; thiab muaj zog tensile zoo, gloss, thiab printability. Nws tuaj yeem dyed rau ntau yam xim (liab, daj, thiab lwm yam).

Cellophane yog tsim los ntawm cov cellulose regenerated, thiab qhov sib txawv ntawm nws pawg molecular tsim ib tug tshwj xeeb permeability, uas yog zoo rau kev tiv thaiv thiab khaws cia cov khoom. Nws tsis yog hluav taws kub-resistant tab sis kub-resistant, seem undeformed ntawm 190 degree, thiab yuav siv tau nyob rau hauv cov zaub mov ntim rau siab - kub kom tsis muaj menyuam nrog rau cov zaub mov. Vim tias cellophane cov khoom siv raw yog muab los ntawm cov khoom siv ntuj tsim, nws yog biodegradable heev, ua rau muaj kev cuam tshuam rau ib puag ncig tsawg.

Cellophane yog tsim los ntawm refined chemical wood pulp los yog paj rwb linter dissolving pulp nrog siab -cov ntsiab lus cellulose. Cov txheej txheem suav nrog alkalization (18% sodium hydroxide), nias, thiab pulverization kom tau alkali cellulose. Tom qab kev laus, carbon disulfide tau ntxiv rau xanthate rau hauv cellulose xanthate, uas yog tom qab ntawd yaj hauv sodium hydroxide tov los tsim cov txiv kab ntxwv - daj cellulose viscose. Cov viscose no kho tau ntawm 20-30 degree, lim kom tshem tawm impurities thiab cua npuas, thiab ces extruded los ntawm ib tug nqaim slit nyob rau hauv ib tug zaj duab xis stretching tshuab. Cov zaj duab xis ntws mus rau hauv lub coagulation da dej uas muaj ib tug sib tov ntawm sulfuric acid thiab sodium sulfate los ua ib tug zaj duab xis (regenerated cellulose zaj duab xis). Cov yeeb yaj kiab no tom qab ntxuav, desulfurization, bleaching, desalting, thiab plasticizing (nrog glycerol thiab ethylene glycol, thiab lwm yam), thiab thaum kawg qhuav.