Cov roj hmab sib xyaw yog cov zaub mov txawv uas cov elastomer hauv paus sib xyaw nrog cov neeg sawv cev kho, cov khoom sau, cov khoom ruaj khov, thiab lwm yam khoom ntxiv kom ua tiav cov khoom siv kho tshuab thiab lub cev tshwj xeeb uas tsim rau cov ntawv thov tshwj xeeb. Kev kos duab thiab kev tshawb fawb ntawm kev sib xyaw roj hmab yog xaiv thiab sib xyaw cov khoom xyaw no kom tau txais qhov sib npaug ntawm qhov nyuaj, kev ywj pheej, kev ywj pheej, thiab kev tiv taus kev hnav, cua sov, lossis tshuaj lom neeg. Tsab xov xwm no muab kev tshuaj xyuas tsis tu ncua ntawm kev faib cov roj hmab sib xyaw, cov khoom siv ua kom nrawm uas xav tau rau kev sib xyaw, thiab cov nplaum siv rau kev sib txuas roj hmab rau cov khoom siv.
Kev faib tawm ntawm cov roj hmab sib xyaw
Cov roj hmab sib xyaw ua ke feem ntau raug faib ua pawg raws li cov polymer siv. Cov hom tseem ceeb suav nrog:
Cov Roj Hmab Ntuj (NR) Cov Tshuaj Sib Xyaws — Tau los ntawm cov roj hmab latex ntawm cov ntoo Hevea brasiliensis, cov tshuaj NR muaj kev ywj pheej zoo heev, lub zog tensile, thiab kev tiv thaiv kev tsim kua muag. Lawv siv dav hauv cov log tsheb, cov siv conveyor, thiab cov khoom siv cais kev co.
Cov Roj Hmab Styrene-Butadiene (SBR) Cov Tshuaj Sib Xyaws — Raws li cov roj hmab hluavtaws feem ntau siv, SBR muab kev tiv thaiv zoo thiab pheej yig, ua rau nws tsim nyog rau cov log tsheb, khau, thiab cov foob lag luam.
EPDM (Ethylene Propylene Diene Monomer) Cov Tshuaj Sib Xyaws — Cov tshuaj sib xyaws no ua rau pom kev tiv taus huab cua, ozone, thiab cua sov, thiab yog li ntawd nyiam siv rau cov foob tsheb, cov ntaub thaiv ru tsev, thiab cov ntawv thov sab nraum zoov.
Cov Roj Hmab Nitrile (NBR) Cov Tshuaj Sib Xyaws — Paub txog kev tiv taus roj thiab roj zoo heev, NBR siv rau hauv cov hoses, gaskets, O-rings, thiab cov khoom siv tswj roj.
Cov Tshuaj Neoprene (CR) - Muab kev sib xyaw ua ke ntawm roj, tshuaj lom neeg, thiab huab cua tsis kam, neoprene pom cov ntawv thov hauv cov khaub ncaws ntub dej, cov gaskets kev lag luam, thiab cov txheej tiv thaiv.
Cov Tshuaj Butyl thiab Halogenated — Cov ntaub ntawv no tsis yooj yim rau cov pa roj thiab tiv taus tshuaj lom neeg, zoo tagnrho rau kev siv cua thiab kev co damping.
Cov Tshuaj Sib Xyaws Silicone thiab Fluoroelastomer — Cov tshuaj sib xyaw tshwj xeeb no tiv taus qhov kub thiab txias heev thiab cov tshuaj lom neeg hnyav, ua haujlwm rau cov khoom siv kho mob, aerospace, thiab kev siv tsheb.
Tshaj li cov polymer puag, cov roj hmab sib xyaw muaj cov khoom sau (carbon dub lossis silica rau kev txhawb nqa), cov neeg sawv cev vulcanizing (sulfur lossis peroxides), cov yas, thiab cov tshuaj antioxidants.
Cov Khoom Siv Ua Kom Vulcanization Accelerators
Kev siv roj hmab ua kom sov yog cov txheej txheem ntawm kev tsim cov kev sib txuas ntawm cov roj hmab loj heev los tsim ib lub network peb-seem. Cov tshuaj accelerators yog cov tshuaj ntxiv rau kom ua kom lub zog ntawm kev siv roj hmab sov sai dua, tso cai rau cov txheej txheem mus ntxiv ntawm qhov kub qis dua nrog kev ua haujlwm zoo dua, thaum tseem txo cov sulfur uas xav tau.
Cov Khoom Siv Ua Kom Ceev Thawj Zaug thiab Thib Ob
Cov tshuaj accelerators muaj ob hom: thawj hom thiab hom thib ob. Cov tshuaj accelerators thawj, xws li thiazoles thiab sulfenamides, ncaj qha ua rau kom vulcanization ceev thiab feem ntau siv ntawm 0.5 txog 1.5 phr (qhov ib puas daim roj hmab). Cov tshuaj accelerators thib ob (tseem hu ua boosters lossis ultra-accelerators) — suav nrog guanidines, thiurams, thiab dithiocarbamates — ua kom cov tshuaj accelerators thawj ua haujlwm kom ua kom ceev dua.
Kev faib tawm los ntawm Chav Kawm Tshuaj (ASTM D4818)
Tus qauv ASTM D4818 muab kev faib tawm ntawm cov khoom siv vulcanization:
Chav Kawm 1 — Sulfenamides: Cov no yog cov tshuaj ua kom cov sulfur vulcanization tseem ceeb uas siv hauv kev lag luam roj hmab niaj hnub no. Lawv muab kev ua haujlwm qeeb (kev nyab xeeb kub hnyiab) ntawm qhov kub ua haujlwm, tiv thaiv kev sib txuas ua ntej lub sijhawm thaum sib tov thiab extrusion, thaum txhawb kev kho sai thaum cov tshuaj mus txog qhov kub vulcanization. Piv txwv li suav nrog CBS (N-cyclohexyl-2-benzothiazolesulfenamide) thiab TBBS.
Chav Kawm 2 — Thiazoles: Cov derivatives ntawm Thiazole, xws li MBT (2-mercaptobenzothiazole) thiab MBTS (dibenzothiazyl disulfide), yog cov accelerator uas siv tau ib leeg lossis ua ke nrog lwm cov accelerators. Lawv muab kev kho sai nruab nrab thiab kev nyab xeeb zoo thaum hlawv.
Pawg 3 — Guanidines: Cov tshuaj no, xws li DPG (diphenyl guanidine), muaj qhov qeeb qeeb ntawm kev sib xyaw ua ke thiab tsis tshua siv ua cov tshuaj ua kom nrawm dua tsuas yog cov khoom siv tuab xwb. Lawv tseem ceeb dua li cov tshuaj ua kom nrawm dua thaum ua ke nrog thiazoles, ua rau muaj kev sib xyaw ua ke sai dua thiab siab dua.
Chav Kawm 4 — Dithiocarbamates: Cov no yog cov khoom siv ceev heev uas muaj qhov ceev ntawm kev sib xyaw ua ke sai dua li thiurams. Zinc diethyldithiocarbamate (ZDEC) thiab zinc dibutyldithiocarbamate (ZDBC) yog cov piv txwv uas siv ntau, siv nrog cov sulfur theem ib txwm muaj.
Chav Kawm 5 — Thiurams (disulfides): Thiuram disulfides, xws li TMTD (tetramethylthiuram disulfide), siv tau rau kev vulcanization yam tsis muaj elemental sulfur, tsim cov tshuaj uas tsis muaj kev thim rov qab, kev teeb tsa qis, thiab cov yam ntxwv zoo rau kev laus. Nrog cov sulfur theem ib txwm muaj, lawv ua haujlwm ua cov ultra-accelerators.
Cov tshuaj ua kom lub zog ua haujlwm
Cov tshuaj ua kom pwm ua haujlwm yog cov tshuaj sib koom ua ke tseem ceeb uas ua haujlwm sib koom tes nrog cov tshuaj ua kom pwm ua haujlwm sai. Lub tshuab ua kom pwm ua haujlwm feem ntau yog zinc oxide ua ke nrog stearic acid. Zinc oxide txhim kho kev tso cua sov tawm, txo cov khoom pwm me me, thiab tswj cov pwm kom huv.
Cov nplaum rau kev sib txuas roj hmab
Cov nplaum thiab cov khoom txhawb nqa kev nplaum yog qhov tseem ceeb rau kev sib txuas roj hmab rau hlau, textiles, thiab lwm yam khoom siv hauv cov khoom tsim xws li cov khoom siv cais kev co, cov bushings sib txuas, thiab cov khoom sib dhos.
Cov Txheej Txheem Sib Txuas Roj Hmab-rau-Hlau
Cov txheej txheem sib txuas lus raug faib ua pawg raws li cov txheej txheem adhesion tseem ceeb:
Kev Sib Txuas Tshuaj (Kev Sib Txuas Ua Ke Nrog Cov Nplaum): Qhov no yog txoj kev ntseeg tau tshaj plaws rau kev siv rau cov qauv thiab cov khoom siv uas muaj qhov hnyav. Cov hlau nto raug ntxuav thiab pleev xim rau, tom qab ntawd pleev xim nrog cov nplaum uas tsim los ua kom cov elastomer sib xyaw thaum lub sijhawm vulcanization. Cov nplaum (piv txwv li, Chemlok 205) txhim kho kev sib txuas rau cov hlau substrate, thaum lub tsho tiv no sib txuas nrog cov roj hmab. Thaum lub sijhawm kho, cov roj hmab sib txuas sab hauv thaum tib lub sijhawm tsim cov tshuaj sib txuas ntawm cov nplaum.
Kev Sib Txuas Mechanical (Geometric Interlocking): Txoj kev no vam khom kev tuav lub cev los ntawm cov grooves, undercuts, lossis perforations hauv qhov hlau. Cov roj hmab tsis tau kho ntws mus rau hauv cov yam ntxwv no thaum lub sijhawm molding thiab xauv rau hauv qhov chaw tom qab kho. Tsis tas yuav muaj cov txheej txheem nplaum, tab sis lub zog sib txuas yog qhov nruab nrab piv rau kev sib txuas tshuaj lom neeg.
Kev Sib Txuas Ncaj Qha (Kev Sib Txuas Uas Tsis Muaj Cov Nplaum Uas Ua Rau Muaj Teeb Meem): Cov roj hmab sib xyaw tshwj xeeb uas sib txuas ncaj qha rau ntawm qhov chaw hlau thaum lub sijhawm vulcanization yam tsis muaj cov nplaum sib cais lossis cov nplaum npog. Cov roj hmab cuam tshuam nrog cov txheej hlau oxide nyob rau hauv kev tswj qhov kub thiab txias thiab siab.
Cov Tshuaj Txhawb Kev Sib Txuas
Cov tshuaj txhawb nqa kev nplaum tau muab tso rau hauv cov roj hmab sib xyaw kom txhim kho kev sib txuas rau cov hlau txhawb nqa. Cov chav kawm tseem ceeb suav nrog:
Cov Tshuaj Cobalt: Cov ntsev Cobalt xws li cobalt naphthenate thiab cobalt stearate yog siv dav los txhim kho kev sib txuas ntawm cov roj hmab thiab cov hlau hauv cov log tsheb, cov siv conveyor, thiab cov hoses. Cov tshuaj Cobalt txhim kho ob qho tib si static thiab dynamic adhesion zog.
Resorcinol-Formaldehyde Resin Systems: Cov kab ke no, feem ntau siv nrog hydrated silica, txhawb kev sib txuas los ntawm methylene acceptor-donor chemistry.
Cov Neeg Sawv Cev Silane Coupling: Silanes, xws li Si-69, ua haujlwm ua cov neeg txhawb nqa kev sib txuas thiab cov neeg sawv cev sib txuas ntawm cov roj hmab thiab cov khoom tsis muaj zog.
Cov Resins Phenolic Hloov Kho: Cov resins no, feem ntau ua ke nrog cov neeg pub methylene xws li hexamethylenetetramine (HMMM), yog siv rau hauv cov khoom siv textile cord-roj hmab.
Xaus lus
Cov roj hmab sib xyaw ua ke raug faib ua pawg los ntawm lawv cov elastomer hauv paus, nrog txhua hom muab cov yam ntxwv ua tau zoo sib txawv rau cov ntawv thov tshwj xeeb. Cov khoom siv ua kom nrawm nrawm - faib los ntawm ASTM D4818 tus qauv rau hauv sulfenamides, thiazoles, guanidines, dithiocarbamates, thiab thiurams - yog qhov tseem ceeb rau kev tswj qhov ceev kho, kev nyab xeeb kub hnyiab, thiab cov khoom siv vulcanizate kawg. Cov nplaum thiab cov neeg txhawb nqa kev nplaum, suav nrog cov txheej txheem primer-cover, cov sib xyaw cobalt, resorcinol-formaldehyde resins, thiab cov neeg sawv cev silane coupling, ua rau muaj kev sib txuas ruaj khov ntawm roj hmab thiab hlau lossis textile substrates. Kev xaiv sib koom ua ke ntawm cov polymer hauv paus, lub kaw lus ua kom nrawm nrawm, thiab cov tshuaj nplaum yog qhov tseem ceeb rau kev tsim cov khoom siv roj hmab ua tau zoo rau kev siv tsheb, aerospace, thiab kev siv hauv kev lag luam.
Lub sijhawm tshaj tawm: Lub Xya Hli-17-2026
