Kev sib xyaw ntawm cov roj hmab yog mus faib ntau yam sib xyaw ua ke nrog cov roj hmab ua ke nrog cov roj hmab, yog li cov hmoov sib xyaw, zinc oxide, pigments, thiab lwm yam) raws li dispersed theem. txheej txheem. Cov kev qhia tshwj xeeb cov kev xav tau ntawm cov txheej txheem sib xyaw ua ke yog: Cov kev sib xyaw ua ke ntawm cov neeg sawv cev sib xyaw, tshwj xeeb yog qhov ua tau zoo tshaj plaws xws li carbon dub, ua tiav kom ntseeg tau tias kev ua tau zoo ib yam li cov roj hmab. Lub resulting roj hmab yog hu ua 'compounding roj hmab ' thiab nws qhov zoo muaj qhov cuam tshuam tseem ceeb ntawm kev ua txuas ntxiv thiab cov khoom lag luam zoo.
1 - compound ntawm neoprene
Neoprene yog emulsion polascerization hom kev tsim khoom, cov txheej txheem ntau lawm feem ntau yog ib lub lauj kaub sib quas polymerization. Polymerization kub feem ntau tswj tau ntawm 40-60 ℃, thiab tus ntsuas hloov siab dua yog li 90%. Polymerization kub, kawg kev hloov pauv hloov kawg nkaus dhau los yog cov txheej txheem siab dhau lossis polymerization rau hauv huab cua yuav ua rau poob rau hauv cov khoom lag luam zoo. Cov txheeb ze cov neeg txheeb ze yog tswj hwm los ntawm cov sulfur-kiuram (tetraalkylmetylamslamslosulity) hauv ntau lawm. Lub ntsiab tseem ceeb ntawm cov sulphur-kiuram system yog qhov tsis muaj kev ruaj ntseg ntawm cov Sulphur Bonds, uas yog ib qho ntawm cov laj thawj tseem ceeb rau cov khoom ntim. Yog tias cov txheeb ze cov roj av yog hloov kho nrog Thiol tuaj yeem txhim kho cov kev ua tau zoo no. Neoprene sib txawv ntawm cov roj hmab hluavtaws roj dav, nws tsis siv cov txiv ntoo sulpanization, tab sis nrog zinc oxide, thiab lwm yam. Vulcanization.
Kev ua kev ua tau zoo ntawm neoprene nyob ntawm tus cwj pwm viscoelastic ntawm unvulcanized roj hmab, thiab nws tus cwj pwm vixees muaj feem nrog ntau yam ntawm neoprene thiab kub. Raws li cov kev sib tov yog feem ntau nqa tawm hauv lub xeev elastic rau kev siv cov tshuaj shear ntawm lub xeev ywj ntawm cov roj hmab los ua kom cov tub lim kom tawg. Yog li ntawd, kom tsis txhob muaj qhov kub ntawm kub thaum sib tov neoprene, tus muab tub lim rau ntxiv kom ntxov li sai tau thiaj li ua tiav tau ib qho kev sib xyaw hauv lub xeev ywj. Thaum sib xyaw nrog qhib apperiner, g-hom neoprene yog rhiab rau qhov kub tshaj 70 ℃, nws yuav ua rau lub chaw muab tub rog tshaj plaws, thiab yog tus muab tub lim rau qhov tsis yooj yim rau kev tawg. Thaum sib xyaw nrog cov tuab tuab dua tshiab, nws lub peev xwm yuav tsum raug txo kom zoo, feem ntau muab faib ua ob qho sib xyaw, txhawm rau txo qis qhov kub thiab txias. Qhov kub thiab txias yuav tsum qis dua 100 ℃.
Neoprene hauv kev siv qhib tshuab sib xyaw ua ke yog qhov kub thiab txias yuav tsum tsis txhob muaj qhov kub, yog li cov neeg muaj peev xwm ua kom yooj yim, nrog tus neeg muaj peev xwm sib tov, yog li cov neeg muaj peev xwm sib xyaw ua ke, yog li cov neeg muaj peev xwm sib cais, yog li cov neeg muaj peev xwm sib xyaw ua ke, yog li cov neeg muaj peev xwm sib xyaw ua ke, yog li cov khoom siv hluav taws xob yooj yim yuav tsum tsis txhob loj. Vim tias qhov muaj zog rhiab rau qhov kub thiab txias, dav dav-hom phiaj neoprene nyob rau chav tsev kub rau 71 ℃, nws yuav qhia cov kab yob, tsis yog tus neeg sawv cev sib kis tas li, nrog tus neeg sawv cev dispersion tseem yuav nyuaj heev. Elastic lub xeev kub ntawm tsis-li-sulfur noprente need Kneading nrog lub tshuab qhib, nyob rau hauv kom zam dhau cov zaub mov nplaum, qhov ntsuas kub yog 5 ~ 10 ℃ lossis tsawg dua li cov roj hmab nyoos yog 5 ~ 10 ℃ lossis tsawg dua li maj mam hloov kho los ntawm loj. Thaum sib xyaw, ua ntej ntxiv acid resawbent magnesium oxide kom tiv thaiv scorching, thiab thaum kawg ntxiv zinc oxide. Txhawm rau kom txo cov kev sib xyaw ua cua sov, carbon xim dub thiab kua muag ua kua tuaj yeem ntxiv rau hauv cov batches. Stearic acid thiab paraaffin ciab thiab lwm pab AIDS ua haujlwm tuaj yeem cuam tshuam ntxiv, yog li kom pab tiv thaiv cov yob. Sulphur-tswj hwm chloroprene roj hmab hauv lub sijhawm qhib qhib lub sijhawm feem ntau yog 30% ntev dua li 20% luv dua li cov sulphur-tswj hwm. Txhawm rau kom tsis txhob neoprene nyob rau hauv lub tshuab sib xyaw ua ke hauv kev qhib qhov kub thiab txias ntau dua 1: 1.2 hauv qab no, cov nyhuv txias yuav zoo dua. Txo lub peev nyiaj rov qab kuj yog txoj hauv kev los kom ntseeg tau kev nyab xeeb thiab kev tawg ua haujlwm zoo. Tam sim no, cov Sulfur cov neeg uas tau xaiv nyob hauv tsev neeg neoprene refining muaj peev xwm tsawg dua 20% mus rau 30%, txhawm rau ua haujlwm ib txwm muaj. Raws li neoprene yog ib qho yooj yim rau scorch, yog li nyob rau hauv kev siv ntom ntom tshuab sib xyaw ua ke feem ntau yog siv hauv ob txoj kev sib xyaw. Qhov sib xyaw ua ke yog qhov qis dua (qhov ntsuas kub yog feem ntau tswj hwm qis dua li ntawm cov roj hmab thiab 0.55), thiab zinc oxide ntxiv rau cov nias hauv ntu ob. Rau cov teeb meem uas chloroprene roj hmab sib xyaw yog yooj yim rau tawg cov ringomen, uas tuaj yeem txo cov roj hmab zoo tib yam ntawm Chloroprene roj hmab hauv cov txheej txheem sib xyaw.
2 - COMPOATING NTAWM TXHEEJ TXHEEM PREMHENGE roj hmab
Ethylene cov roj hmab kuj tseem tuaj yeem ua tiav los ntawm cov khoom siv roj hmab zoo nkauj, feem ntau yog siv cov ntaub ntawv txuas ntxiv, kom ua tiav cov ntawv txuas ntxiv, kom ua tiav daim ntawv txuas ntxiv, kom ua tiav daim ntawv txuas ntxiv Yob kub rau sab pem hauv ntej yob 50 ~ 60 ℃, tom qab yob 60 ~ 70 ℃ tsim nyog. EPDM roj hmab roj hmab pub mis feem ntau: Raw roj hmab roll-1/2 carbon dub-1/2 carbon olide acid-zincide (lossis magnesium-rosslinker-rosslinker-rosslinker-ballinder -thin pass, qis dua ntawv. Ethylene Roj Hmab tsis yooj yim dua-ua kom zoo thaum sib tov, thiab cov compound yog tusyees impersed, tab sis tus kheej-nplaum khoom yog neeg pluag. Ethylene-propylene roj hmab tov nrog qhib qhib rolliner, thiab tom qab ntawd cov khoom sib txuas, thiab tom qab ntawd cov compound, tus yob kub ntawm 60 ~ 70 ℃. Qhov sib xyaw kub yog 150 ~ 160 ℃, uas tuaj yeem pab cov dispersion ntawm cov muab tub lim thiab mos mos thiab kev txhim kho ntawm cov khoom siv mechanical. Lub chaw thau khoom muaj peev xwm yog 10% ~ 15% siab dua lwm cov khoom siv roj hmab.
3- Compounding ntawm fluoroelomer
Fluorine roj hmab menny viscosity yog siab, rigid, kev sib xyaw ua ke kub tiam, kev sib xyaw ua ke thiab kev ua yog qhov nyuaj. Thaum ua kom muaj roj hmab fluorine rau ntawm lub tshuab ua kom huv, rau cov yob me me, tsis muaj peev xwm tswj qhov kub thiab txias, xaim kub tswj ntawm 50 ~ 60 ℃. Kev sib xyaw ua ke, ua ntej ua rau cov menyuam roj hmab nyias muaj nyias txog 10 zaug los ua cov pa hluav taws xob, thiab tom qab ntawd ntxiv cov roj hmab sib xyaw, tab sis yuav tsum tau sai li sai tau. Cov roj hmab fluorine yog qhov nyuaj rau siv lub tshuab ua ke sib xyaw ua ke, tab sis hom meshing meshing tshuab txias zog yog qhov muaj zog dua, koj tuaj yeem sib xyaw roj hmab roj fluorine. Cov roj hmab sib xyaw yuav tsum nres rau 24 teev ua ntej siv, thiab yuav tsum tau ua kom zoo ua keyees thiab txhim kho cov roj hmab thiab cov roj hmab tus kheej ntawm cov roj hmab.
