Qhov no txhim khu kev qha thiab ntau yam nyoos roj hmab

Roj Hmab yog paub txij li thaum lub sij hawm ntawm lub foundations ntawm America los ntawm Columbus. Cov Khab siv lub ntais kua ntoo roj hmab ntoo Hevea yuav muab lub bottoms ntawm tej nkoj nquam, tsim tais diav, waterproof khau, raws li zoo raws li rau qhov siv thiab ua cov khoom. Tab sis nyob rau hauv cov teb chaws Europe rau ib ntev lub sij hawm log tsheb yog tsis lug siv (mus txog rau lub XIX century). Thiab tag nrho vim hais cov nqaij nyoos roj hmab tshaj lub sij hawm qhuav tawm thiab ua nyuaj. Tus invention txheej txheem rov roj hmab thawj zaug zog zoo li raws li nws cov kub stabilization tsim tiag tiag boom nyob rau hauv qhov siv thiab ua roj hmab cov khoom.

Raws li cov roj hmab-plantation yuav tsis muab cov steadily loj hlob coob, lub sij hawm, nws tsim ib tug qauv ntawm cov muab hluavtaws roj hmab, uas peb tseem siv niaj hnub no. Nyob rau hauv lub niaj hnub manufacture cov nqaij nyoos roj hmab thiab roj hmab tebchaw. Nyob rau hauv nws cov nqaij nyoos daim ntawv no yog siv rau qhov siv thiab ua ntau yam khoom, raws li ib tug txoj cai - sealing thiab kho ntawm lub tsheb log tsheb thiab cov koob yees duab kub qauv (tua). Los ntawm mixtures muab ib tug ntau yam ntawm cov khoom uas yog siv nyob rau hauv txhua lub sectors. Ob leeg ib tug thiab lwm yam ntaub ntawv muaj nyob rau hauv daim ntawv ntawm cov ntawv txheeb los yog nruam sawb (web). Sij hawm lawv yuav ua tau heev txawv - noj qab haus huv, khoom noj khoom haus, dielectric, roj-resistant, etc.

Kev siv cov nyoos roj hmab rau repairing log tsheb

Neeg tsav tsheb feem ntau confronted nrog tus neeg mob ntawm cov neeg kho tshuab kev puas tsuaj rau cov log tsheb (raws li tau zoo raws li cov koob yees duab). Nyob rau hauv Feem ntau, lub puas log yuav kho. Qhov no yuav ua tau tag nrho ob qho txias thiab kub vulcanization. Khaub thuas yog tau siv ib tug tshwj xeeb pes tsawg leeg (butyl activator txheej), thiab qhov kub vulcanisation - crude roj hmab.

Cov compound roj hmab Cheebtsam ntawm txias vulcanization yog ua tsis tshav kub kev kho mob. Qhov no txoj kev yuav siv sij hawm ntev npaum li cas thiab yuav tsum tau nruj ua raws li tus tsim technology. Kub curing yuav tsum tau nyob rau hauv tag nrho, nrog rau thiab nyob rau hauv lub teb, tej yam kev mob. Qhov no yuav tsum tau tsuas yog ib lub nyoos roj hmab thiab ib tug vulcanizer. Tua tej zaum yuav nyob ruaj ruaj, portable (khiav los ntawm 220) thiab cov portable (tsheb khiav rau ib tug network).

Yuav ua li cas siv lub raw roj hmab thaum lub sij hawm vulcanization

Ua ntej ntawm tag nrho cov, cov puas cheeb tsam yuav tsum tau kom huv si ntxuav ntawm av, kho ntwav txhuam ntoo thiab degrease. Ces koj yuav tsum muab tso rau hauv ib thaj txiav los ntawm crude roj hmab thiab muab tso rau hauv ib tug vulcanizer. Yuav kom tiv thaiv adhesion ntawm lub thaj thiab lub caij cua kub yog feem ntau ib daim ntawv ntawm daim ntawv paving.

Crude roj hmab zoo li ib yam ntawm cov yas sib tov, uas, thaum vulcanization penetrates sufficiently tsaug rau hauv lub lesion thiab securely embeds nws. Thaum rhuab, nws yuav muaj zog, tab sis tseem saj zawg zog. Qhov kub uas ruaj khov tshwm sim yog hais txog 140-160 ° ^C. Thaum ncav no kub (txiav txim los ntawm ib tug kev hloov nyob rau hauv cov xim ntawm daim ntawv) vulcanizer kaw. Thaum cov khoom no yog kiag li txias, nws yog npaj txhij rau ntxiv siv.

Tsis pom zoo Tsis txhob tsa kub tshaj 160 ^{° C,} raws li qhov no ua rau desiccation ntawm roj hmab thiab, raws li ib tug tsim nyog tau - mus tsis tau ntawm elasticity.