Vim li cas roj hmab yuav tsum tau vulcanized?Dab tsi yog cov txiaj ntsig ntawm vulcanizing roj hmab?
Txawm hais tias cov roj hmab nyoos roj hmab kuj muaj qee qhov kev siv tau zoo, nws kuj muaj ntau yam tsis zoo, xws li tsis muaj zog thiab elasticity tsawg;Txias ua rau nws nyuaj, kub ua rau nws nplaum;Yooj yim rau hnub nyoog, thiab lwm yam. Raws li thaum ntxov xyoo 1840, nws tau pom tias roj hmab tuaj yeem hla kev sib txuas los ntawm cua sov ua ke nrog leej faj.Yog li ntawd, kom txog rau thaum tam sim no, txawm tias roj hmab tuaj yeem txuas tsis tau tsuas yog nrog leej faj, tab sis kuj nrog ntau lwm cov tshuaj sib txuas sib txuas thiab cov txheej txheem ntawm lub cev thiab tshuaj, hauv kev lag luam roj hmab, nws yeej ib txwm ua raws li cov roj hmab crosslinking raws li "vulcanization", thaum. kev lag luam kev lag luam yas qee zaum hais txog cov tshuaj tiv thaiv crosslinking li kev kho.Vulcanization zoo heev txhim kho cov kev ua tau zoo ntawm cov roj hmab raw, nthuav dav daim ntawv thov roj hmab, thiab nteg lub hauv paus rau kev lag luam loj thiab kev siv roj hmab.
Roj hmab vulcanization yog ib qho ntawm cov txheej txheem tseem ceeb hauv kev ua cov khoom siv roj hmab, thiab nws tseem yog cov kauj ruam kawg hauv kev tsim cov khoom siv roj hmab.Nyob rau hauv cov txheej txheem no, roj hmab tau dhau los ntawm ntau yam kev hloov tshuaj lom neeg, los ntawm cov yas sib xyaw rau cov roj hmab uas muaj zog heev los yog tawv tawv sib txuas, thiaj li yuav tau txais ntau lub cev, txhua yam thiab tshuaj lom neeg, thiab txhim kho thiab nthuav dav siv tus nqi thiab daim ntawv thov. ntau yam khoom siv roj hmab.Yog li ntawd, vulcanization yog qhov tseem ceeb heev rau kev tsim thiab siv roj hmab thiab nws cov khoom.
Lub tswvyim ntawm vulcanization
Vulcanization yog hais txog cov khoom lag luam ib nrab ua tiav los ntawm cov khoom siv roj hmab nrog qee yam plasticity thiab viscosity (raws li roj hmab, yas compound, sib xyaw roj hmab) los ntawm kev tsim nyog (xws li dov, extrusion, molding, thiab lwm yam) nyob rau hauv tej yam kev mob sab nraud, los ntawm tshuaj lom neeg. yam (xws li vulcanization system) los yog lub cev yam tseem ceeb (xws li γ Cov txheej txheem ntawm kev hloov cov nyhuv ntawm cov hluav taws xob rov qab mus rau hauv cov khoom siv roj hmab muag muag lossis cov khoom siv roj hmab tawv kom tau txais kev ua tau zoo hauv kev siv. Thaum lub sij hawm vulcanization txheej txheem, lwm yam kev mob (xws li cua sov los yog hluav taws xob) ua rau muaj tshuaj lom neeg cov tshuaj tiv thaiv ntawm cov roj hmab nyoos hauv cov khoom siv roj hmab thiab cov vulcanizing tus neeg sawv cev los yog nruab nrab ntawm cov roj hmab nyoos thiab cov roj hmab nyoos, uas ua rau kev sib txuas ntawm cov roj hmab macromolecules rau hauv peb-dimensional network structured macromolecules.
Los ntawm cov tshuaj tiv thaiv no, ntau yam khoom ntawm cov roj hmab tau txhim kho zoo heev, ua rau cov khoom siv roj hmab kom tau txais lub cev, kev siv tshuab, thiab lwm yam khoom uas tuaj yeem ua tau raws li cov kev xav tau ntawm cov khoom siv.Lub ntsiab lus ntawm vulcanization yog kev sib txuas sib txuas, uas yog cov txheej txheem ntawm kev hloov cov qauv ntawm cov roj hmab molecular rau hauv cov qauv sib txuas.
Sulfurization txheej txheem
Tom qab ntsuas tus nqi ntawm cov roj hmab sib xyaw thiab vulcanizing tus neeg sawv cev, cov kauj ruam tom ntej yog ntxiv tus neeg sawv cev vulcanizing.Nws raug nquahu kom ua raws li cov kauj ruam hauv qab no kom ua tiav.
1. Ua ntej, ntxuav lub qhov qhib zeb kom huv si kom tsis txhob muaj kev sib xyaw ntawm lwm cov impurities.Tom qab ntawd kho cov menyuam lub suab ntawm qhov qhib zeb kom tsawg thiab ncuav cov roj hmab sib xyaw rau hauv lub zeb qhib rau nyias dhau.Tom qab nyias hla dhau lawm, yob qhov sib nrug ntawm qhov sib tov yuav tsum tau nthuav dav kom tsim nyog kom paub meej tias cov roj hmab sib xyaw yog sib npaug ntawm cov yob.Qhov kub ntawm cov roj hmab sib xyaw yuav tsum nyob ib ncig ntawm 80oC.
2. Los ntawm kev kho cov menyuam lub suab thiab cov dej txias kom tsim nyog, qhov kub ntawm cov roj hmab sib xyaw yog tswj tau ntawm ib ncig ntawm 60-80 ° C. Lub sijhawm no, tus neeg sawv cev vulcanizing tau pib ntxiv rau cov roj hmab sib xyaw.
Post lub sij hawm: Oct-25-2023
