Basic Properties Ntawm Roj Hmab Yuav Tsum Tau Rau Roj Hmab Sheet Production

1. Natural roj hmab NR

(Natural Rubber) Nws yog tsim los ntawm latex sau los ntawm cov ntoo roj hmab thiab yog ib qho polymer ntawm isoprene. Nws muaj qhov zoo abrasion tsis kam, siab elasticity, tawg lub zog thiab elongation. Nws yog qhov yooj yim rau hnub nyoog hauv huab cua thiab hloov pauv thaum raug tshav kub. nplaum, yooj yim rau o thiab yaj hauv cov roj ntxhia lossis roj av, tiv taus alkali tab sis tsis muaj zog acid.

Qhov zoo: zoo elasticity, acid thiab alkali tsis kam.

Disadvantages: Tsis huab cua-resistant, tsis muaj roj-resistant (zaub roj-resistant) yog raw khoom rau ua tapes, hoses, thiab roj hmab khau, thiab yog haum rau ua shock-absorbing qhov chaw, khoom siv nyob rau hauv automotive nres kua, ethanol thiab lwm cov kua nrog hydroxide radicals.

2. SIB

(Styrene Butadiene Copolyme) Copolymer ntawm butadiene thiab styrene, piv nrog cov roj hmab ntuj, muaj cov yam ntxwv zoo, tsis tshua muaj teeb meem txawv teb chaws, zoo abrasion tsis kam thiab aging kuj, tab sis tsis muaj zog mechanical zog, blended nrog ntuj roj hmab siv.

Qhov zoo: Cov khoom siv uas tsis yog roj-tshuaj, zoo dej-tiv taus, zoo elasticity qis dua 70 hardness, tsis zoo compressibility ntawm siab hardness.

Qhov tsis zoo: Cov kua qaub muaj zog, ozone, roj, roj esters thiab cov rog thiab cov hydrocarbons feem ntau tsis pom zoo. Siv hauv kev lag luam log tsheb, khau kev lag luam, kev lag luam daim ntaub thiab kev lag luam conveyor siv, thiab lwm yam. SBR muaj cov cua sov zoo, ua kom tsis muaj zog, kev laus tsis kam, roj tsis kam thiab ozone kuj. Zoo cia ruaj khov, tuaj yeem khaws cia rau ntau xyoo hauv qhov tsaus ntuj. Soluble nyob rau hauv benzene, toluene, xylene, ethyl acetate, chloroform thiab lwm yam kuab tshuaj.

3. Butyl Rubber IIR

(Butyl Rubber) yog lub polymerization ntawm isobutylene thiab ib qho me me ntawm isoprene. Vim tias qhov kev txav ntawm steric barrier molecule ntawm methyl pawg yog tsawg dua li ntawm lwm cov polymers, nws muaj roj tsawg permeability thiab tiv taus tshav kub, tshav ntuj thiab ozone. Loj, zoo hluav taws xob rwb thaiv tsev; siab tsis kam mus rau thiab cov neeg ua haujlwm capacitive, qhov kev khiav hauj lwm kub yog -54-110 degree .

Qhov zoo: impermeability rau feem ntau gases, zoo tiv thaiv tshav ntuj thiab tsw, raug tsiaj los yog zaub roj los yog vaporizable tshuaj.

Disadvantages: Nws tsis pom zoo kom siv nws nrog roj av hnyav, kerosene thiab aromatic hydrogen. Nws yog siv rau hauv lub raj, lub hnab tawv, roj hmab paste ntawv, lub qhov rais ncej roj hmab, chav hose, tshav kub-resistant conveyor siv, thiab lwm yam ntawm lub tsheb log tsheb.

4. Neoprene CR

(Neoprene, Polychloroprene) yog polymerized los ntawm chloroprene monomer. Cov roj hmab tom qab vulcanization muaj elasticity zoo thiab hnav tsis kam, tsis ntshai ntawm tshav ntuj ncaj qha, muaj huab cua zoo tiv thaiv, tsis ntshai ntawm kev cuam tshuam loj, thiab tsis ntshai ntawm cov tub yees, Nws yog resistant rau dilute acid thiab silicone ester series lubricating roj, tab sis tsis tiv taus phosphate ester series hydraulic roj. Nws yog ib qho yooj yim rau crystallize thiab harden ntawm qhov kub thiab txias, tsis zoo cia stability, thiab nthuav heev nyob rau hauv cov ntxhia roj nrog tsawg aniline point. Kev khiav hauj lwm qhov kub thiab txias yog - 50 ~ 150 degree .

Qhov zoo: zoo elasticity thiab zoo compression deformation, cov mis tsis muaj sulfur-sulfur, yog li nws yooj yim los ua. Nws muaj cov yam ntxwv ntawm kev tiv thaiv rau tsiaj thiab zaub roj, thiab yuav tsis cuam tshuam los ntawm cov tshuaj nruab nrab, roj, roj, ntau yam roj, cov kuab tshuaj. Thiab cuam tshuam rau lub cev muaj zog, nrog rau cov yam ntxwv imitation combustion

Qhov tsis zoo: Nws tsis pom zoo kom siv cov kua qaub muaj zog, nitro hydrocarbons, esters, chloroform thiab ketones ntawm cov tshuaj. R12 refrigerant resistant seals, roj hmab qhov chaw los yog cov ntsaws ruaj ruaj ntawm cov khoom siv hauv tsev. Nws yog qhov tsim nyog los ua qhov chaw uas nyob rau hauv kev sib cuag ncaj qha nrog huab cua, hnub ci thiab ozone. Nws yog siv rau ntau yam nplaim taws-resistant thiab tshuaj-resistant roj hmab khoom.

5. EPDM

(Ethylene propylene Rubber) yog ua los ntawm ethylene thiab propylene copolymer, yog li cov cua sov tsis kam, kev laus ua haujlwm, kev tiv thaiv ozone, thiab kev ruaj ntseg zoo heev, tab sis tsis tuaj yeem ntxiv sulfur-sulfur. Txhawm rau daws qhov teeb meem no, hauv EP Ib qho me me ntawm cov khoom thib peb nrog ob lub saw txuas ntxiv rau cov saw tseem ceeb thiab cov sulfur tuaj yeem ntxiv rau daim ntawv EPDM. Kev khiav hauj lwm kub yog -50 ~ 150 degree .

Qhov zoo: Nws muaj huab cua tsis zoo thiab ozone tsis kam, tuaj yeem siv cawv thiab ketones, tiv taus qhov kub kub, thiab muaj qhov tsis zoo rau cov pa roj.

Disadvantages: Tsis pom zoo rau kev siv zaub mov los yog raug rau cov ntxhiab hydrogen. Cov ntsaws ruaj ruaj rau qhov kub-kub dej vapor ib puag ncig Cov khoom siv huv huv seals lossis qhov chaw. Roj hmab qhov chaw hauv braking (brake) systems. Foob hauv radiator (tsheb radiator).

6. Nitrile NBR

(Nitrile Rubber) Copolymerized los ntawm acrylonitrile thiab butadiene, cov ntsiab lus ntawm acrylonitrile yog 18 feem pua ​​~ 50 feem pua. Qhov siab dua cov ntsiab lus ntawm acrylonitrile, qhov zoo dua qhov kev tiv thaiv rau petrochemical hydrocarbon roj roj, tab sis qhov kub tsis tshua muaj qhov kev ua tau zoo zuj zus, thiab kev khiav hauj lwm kub yog -25 ~ 100 degree . Nitrile roj hmab yog ib qho ntawm cov roj hmab feem ntau siv rau cov roj foob thiab O-rings.

Qhov zoo: zoo roj kuj, dej tsis kam, hnyav tsis kam thiab siab siab roj kuj, zoo compressibility, hnav tsis kam thiab elongation quab yuam.

Qhov tsis zoo: Tsis haum rau kev siv cov kuab tshuaj hnyav, xws li ketones, ozone, nitro hydrocarbons, MEK thiab chloroform. Siv los ua cov roj tso tsheb hlau luam, lubricating roj tso tsheb hlau luam thiab hauv cov roj av hydraulic roj, roj av, dej, roj silicone, roj hmab qhov system Cov roj hmab cov khoom siv hauv cov kua dej xws li cov roj lubricating yog sealing qhov chaw. Nws tuaj yeem hais tias nws yog cov khoom siv dav siv thiab cov roj hmab uas tsis tshua muaj nqi.

7. Cov nplaum nplaum

(Hydrogenate Nitrile) Hydrogenated nitrile roj hmab yog cov roj hmab nitrile uas tau raug hydrogenated tshem tawm qee cov saw hlau ob. Tom qab hydrogenation, nws qhov kub thiab txias tsis kam thiab huab cua tsis kam yog siab dua li cov roj hmab nitrile dav dav, thiab nws cov roj kuj yog tib yam li cov roj hmab nitrile. kua nplaum nyob ze. Kev khiav hauj lwm qhov kub thiab txias yog -25 ~ 150 degree .

Qhov zoo: zoo abrasion tsis kam tshaj nitrile roj hmab, zoo corrosion kuj, tensile zog, tsim kua muag kuj thiab compression zog, zoo kuj-kuj nyob rau hauv atmospheric tej yam kev mob xws li ozone, feem ntau haum rau ntxhua khaub ncaws los yog ntxuav tais diav.

Qhov tsis zoo: Tsis pom zoo siv rau hauv cawv, esters lossis tshuaj tsw qab. Kev lag luam cua txias thiab tub yees. Foob rau ib puag ncig tiv thaiv tub yees R134a tshuab. Automotive engine system seals.