Polyvinyl cawv yog dab tsi

1. Lub cev thiab tshuaj muaj zog

Lub cev muaj zog

1. A. Solubility: Polyvinyl cawv hmoov tuaj yeem yaj hauv dej. Polyvinyl cawv resin (PVA) nrog rau qib alcoholysis tsawg dua 95% tuaj yeem yaj hauv chav dej kub, thaum polyvinyl cawv resin (PVA) nrog rau qib alcoholysis ntau dua 99.5% tsuas yog yaj hauv dej kub saum 95 degree.
2. B. Thermal stability: Polyvinyl cawv softens thaum rhuab thiab tsis qhia cov kev hloov tseem ceeb hauv qab 40 degree. iav hloov kub: 75-85 degree . Thaum rhuab saum 100 degree, nws maj mam hloov xim thiab ua nkig. Tshaj li 160 degree, cov cua kub ntev yuav maj mam xim, dehydrate thiab etherify, thiab poob solubility; Thaum kub siab tshaj 220 degree, decomposition tshwm sim, ua dej, acetic acid, acetaldehyde, thiab butenal; Polymer muaj conjugated ob daim ntawv cog lus ntawm qhov kub siab tshaj 250 degree
3. C. Tshuaj tiv thaiv: PVA yuav luag tsis muaj kev cuam tshuam los ntawm cov kua qaub tsis muaj zog, cov hauv paus, lossis cov kuab tshuaj organic, thiab muaj roj ua haujlwm siab.
4. D. Cia ruaj khov: PVA yog cov viscosity tsawg polymer, thiab nws cov kua aqueous ruaj khov heev ntawm chav tsev kub. Cov tshuaj aqueous yuav tsis deteriorate thaum khaws cia
5. E. Zaj duab xis tsim cov cuab yeej: Vim lub siab adhesion ntawm PVA molecules, PVA yog ib qho yooj yim los tsim ib zaj duab xis, ua rau cov xim tsis muaj xim thiab pob tshab nrog cov neeg kho tshuab zoo, lub ntsej muag du tsis muaj nplaum, thiab zoo solubility. Molecular daim nyias nyias muaj lub teeb pom kev zoo, siab noo noo permeability, tsis muaj nqi, tsis muaj plua plav nqus, thiab luam ntawv zoo

Khoom siv

Polyvinyl cawv resin (PVA) aqueous tov muaj zoo zaj duab xis-tsim thiab emulsifying zog. Nws tuaj yeem ua kev tiv thaiv colloid rau polymer emulsification thiab tshem tawm cov tshuaj tiv thaiv polymerization.

Polyvinyl cawv tuaj yeem siv rau hauv textile pulp, Vinyl fiber, ntawv txheej cov neeg ua haujlwm, cov khoom siv hauv tsev, cov nplaum, PVA films, PVB raw khoom, khoom noj khoom haus thiab tshuaj, thiab lwm yam. PVA kuj tseem tuaj yeem siv los ua kev hloov kho av, polymerization ncua kev kawm tus neeg saib xyuas thiab emulsifier, quenching agent, thiab lwm yam. Tsis tas li ntawd, raws li tib neeg txuas ntxiv txhim kho thiab txhim kho kev ua tau zoo ntawm PVA, nws cov ntawv thov tau nthuav dav tas li

Cov khoom zoo li:

dawb flocculent, flaky, thiab powdery khoom. Cov khoom no tsis muaj kev phom sij, tsis tawg, tsis muaj oxidizing, tsis corrosive, tsis muaj xov tooj cua, tsis muaj tshuaj lom thiab tsis zoo.

Ntau hom polyvinyl cawv (PVA)

1. Vinylon raw khoom:

   Polyvinyl cawv tuaj yeem yaj, spun, thiab tom qab ntawd raug kho acetalization los tsim cov vinylon fibers. Nws tuaj yeem sib xyaw nrog paj rwb, ntaub plaub, viscose fibers, thiab lwm yam los tsim cov khoom siv vinylon, uas tau siv dav hauv cov khaub ncaws, tarpaulins, curtain cords, ntses net ropes, thiab lwm yam. Feem ntau, nws yog qhov zoo dua los xaiv PVA 17-99 Raws li cov khoom siv spinning nrog qhov nruab nrab polymerization degree ntawm 1750 ± 502.

2. Warp size:

3. a. Cov khoom siv loj yog tsim los ntawm polyvinyl cawv muaj qhov zoo adhesion rau paj rwb, linen, polyester, thiab vinylon viscose fibers. Tom qab tsim cov yeeb yaj kiab, nws yog du thiab ruaj khov, hnav-tiv taus, thiab txhawb nqa kev sib haum xeeb ntawm cov xov paj warp, txo kev sib txhuam thiab khoov los ntawm warp yarns thaum lub sij hawm weaving. Kev txav txav hnyav xws li ncab ua rau muaj kev sib tsoo, txo qhov tawg ntawm lub tshuab ntaub. Tsis tas li ntawd, cov ntaub woven muaj ib qho kev ntxhib los mos. Smooth thiab muag heev, cov ntaub nto tsis ntxhib.

   b. Polyvinyl cawv yog cov dej-soluble polymer compound uas yooj yim sib tov, thov, thiab tshem tawm. Nws yog feem ntau zoo dua los xaiv polyvinyl cawv (xws li PVA15-99, 16-99, 17-99) nrog qis nruab nrab polymerization degree raws li slurry.

4. Adhesive:

1. a. Cov tshuaj aqueous ntawm polyvinyl cawv muaj zog adhesion rau cov ntaub ntawv uas muaj cellulose (xws li ntawv, ntaub, ntoo, thiab lwm yam), thiab muaj qhov zoo ntawm kev nyab xeeb thiab tsis muaj tshuaj lom. Nws tuaj yeem siv rau laminating cardboard, sib txuas corrugated cardboard, thiab chaw ua haujlwm nplaum. Kraft daim ntawv hnab siv rau ntim cov khoom hnyav xws li cov cement, chiv, nplej, thiab lwm yam kuj siv PVA ua cov nplaum.

b. Urea formaldehyde resin thiab phenolic resin hloov nrog polyvinyl cawv tuaj yeem siv los ua cov nplaum rau cov laminated thiab cov laug cam.

c. Polyvinyl cawv aqueous tov (los ntawm kev ntxiv cov khoom tsim nyog thiab cov khoom ntxiv) kuj tau siv dav los npaj cov nplaum rau cov ntawv sib txuas xws li luam ntawv thiab khi, ntawv raj, thiab cov thawv ntawv.

d. Raws li kev ua haujlwm ntawm cov kua qaub, polyvinyl cawv tuaj yeem sib xyaw nrog formaldehyde, butyraldehyde, glyoxal lossis lwm yam aldehydes los tsim polyvinyl cawv acetals (xws li PVAF, PVB) nrog rau cov dej muaj zog, adhesion, thiab txhua yam muaj zog. Lawv tau siv dav hauv kev tsim kho, txheej txheej, cov nplaum, kev nyab xeeb iav interlayers, thiab lwm yam. Raws li qib ntawm polymerization ntawm PVA nce, viscosity ntawm acetals nce.

e. Polyvinyl cawv yog ib qho zoo heev tiv thaiv colloid thiab dispersant rau homopolymerization ntawm vinyl acetate los yog copolymerization nrog rau lwm cov monomers los tsim cov tshuaj pleev ib ce (dawb kua nplaum), uas yog ib qho tseem ceeb nyob rau hauv zus tau tej cov kua nplaum dawb. Feem ntau, cov viscosity ntawm cov tshuaj pleev ib ce nce ntxiv thaum lub polymerization degree ntawm polyvinyl cawv nce. Ib nrab alcoholysis polyvinyl cawv (17-88) yog siv ua ke nrog ua tiav alcoholysis polyvinyl cawv (xws li 17-99, 19-99, thiab lwm yam). Kev siv ib nrab alcoholysis polyvinyl cawv tuaj yeem ua rau kom muaj kev ruaj ntseg ntawm cov tshuaj pleev ib ce, thiab kev siv cov cawv ua kom tiav alcoholysis polyvinyl cawv tuaj yeem ua rau cov dej tsis kam ntawm cov tshuaj pleev ib ce.

5. Ntawv ua:

a. Polyvinyl cawv tuaj yeem siv los ua tus neeg saib xyuas qhov chaw rau daim ntawv hauv kev lag luam papermaking, nrog rau cov yam ntxwv ntawm cov yeeb yaj kiab zoo thiab cov yeeb yaj kiab siab. Nws tuaj yeem txhim kho kev luam ntawv hloov tau, smoothness, kev sib txhuam tsis kam, folding tsis kam, roj tsis kam, thiab tshuaj lom neeg ntawm daim ntawv. Xaiv PVA nrog qhov nruab nrab polymerization degree ntawm 1750 ± 50 raws li tus neeg saib xyuas nto rau daim ntawv yog qhov zoo.

b. Pigment processing agent: Nws tuaj yeem txhim kho cov xim dawb thiab glossiness ntawm daim ntawv coated, ua rau cov ntawv luam tawm zoo, xim ci, thiab txhim kho daim ntawv zoo. Nws yog qhov zoo dua los xaiv polyvinyl cawv nrog qhov nruab nrab siab dua ntawm polymerization.

c. Raws li tus neeg saib xyuas sab hauv rau daim ntawv: Thaum ua ntawv, cov hmoov polyvinyl cawv ntxiv rau cov tawv nqaij kom tuav thiab ua ntawv, ua rau cov ntawv muaj zog. Nws yog qhov zoo dua los xaiv polyvinyl cawv nrog qhov nruab nrab siab dua ntawm polymerization.

5. Polyvinyl cawv zaj duab xis yog ib zaj duab xis ua los ntawm cov khoom no, uas muaj qhov zoo transparency, siab tensile thiab tawg tsis kam, zoo noo noo permeability thiab gas barrier, roj kuj, organic tshuaj, thiab tsis muaj hluav taws xob zoo li qub. Yog li ntawd, nws yog haum rau ntim textiles

Nqe ntawm PVA

Tus nqi sib txawv rau polyvinyl cawv nrog kev siv sib txawv.

Yog xav paub ntxiv pls xa lus nug rau Shanxi Colorshine Chemical Industry Co., ltd. Peb yuav xa cov ntaub ntawv ntxaws ntxaws rau koj