Rosin yog ib yam khoom nthuav heev

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Rosin yog ib qho amorphous, nkig nrog cov qauv vitreous thiab xim ntawm lub teeb daj mus rau tsaus liab. Nws yog tau tom qab distillation ntawm volatile tivthaiv los ntawm resins ntawm coniferous ntoo. Cov khoom siv tshuaj lom neeg ntawm rosin (txog 90% ntawm resin acids, suav nrog lub ntsiab - abietic) ua rau nws tsis muaj dej, tab sis soluble hauv ethers, cawv, chloroform thiab benzene. Thaum rhuab mus rau 50-120 C (rau ntau hom), rosin tuav soften.

lo lus "rosin" los ntawm qhov twg? Qhov no feem ntau yuav yog lub npe txawv ntawm Greek lub nroog Colophon thaum ub, nyob ib ncig ntawm cov ntoo loj hlob, muab cov khoom zoo li no. Nyob rau hauv ancient sij hawm (ntau tshaj peb txhiab xyoo dhau los), turpentine tau los ntawm resins los ntawm cua sov, thiab cov seem qhuav yog ib yam khoom qub rosin xwb.

Rosin yog ib qho khoom siv uas koj tsis tuaj yeem ua si, piv txwv li, violin, viola, ob lub bass, cello. Thaum rub lub hneev nrog ib daim ntawm cov khoom no, cov molecules dawb yog tsim, uas muab ib qho adhesion rau.txoj hlua, uas pab txhawb rau kev rho tawm suab. Xws li rosin feem ntau yog tsim nyob rau hauv txoj kev tsis yog kev lag luam los ntawm cov resins sau tshwj xeeb rau lub caij nplooj zeeg nrog qhov sib ntxiv ntawm cov khoom xyaw "secret" uas txhua lub tuam txhab muaj nws tus kheej (hlau, nyiaj thiab txawm tias kub plua plav, thiab lwm yam tuaj yeem ntxiv). Tsis tas li ntawd, rosin siv los txhuam cov leeg ua ntej kev ua kis las, piv txwv li, wrestlers, nrog rau cov eeb ntawm jockeys ua ntej kev sib tw.

Rosin yog ib yam khoom uas tau ua thiab siv dav hauv kev lag luam. Nyob rau hauv yav tas los, nws yog nyob rau hauv kev thov nyob rau hauv xab npum ua, zus tau tej cov plasters, sealing ciab. Niaj hnub no, sib xyaw nrog Rosin yog siv los ua kom nrawm dua iav cov teeb lub teeb, rau kev tsim cov kua roj vanish, hauv kev lag luam soldering, thiab tseem nyob hauv kev lag luam ntawv. Thiab txhua qhov chaw nws cov cuab yeej tseem ceeb yog siv - lub peev xwm los tsim cov nplaum nplaum thaum rhuab.

Kev tsim cov rosin feem ntau tsis tau hloov pauv hauv ib txhiab xyoo. Cov khoom siv (tarred stumps, sau resin - resin) yog muab tso rau hauv cubes, qhov twg nws yog steamed los yog rhuab rau hluav taws. Txog 12 kg ntawm turpentine (distilled tawm) thiab 70 kg ntawm rosin yog tau los ntawm ib tug centner ntawm resin, uas yog boiled down kom tshem tawm cov kua thiab muab tso rau hauv ntim. Yog hais tias cov khoom raug muab rho tawm los ntawm stumps, ces lawv yog pre-crushed, thiab ces sib tov ntawm ntoo chips thiab dej yog raug mus rau lub extraction txheej txheem. Kwv yees li plaub caug kilograms ntawm rosin tuaj yeem tau los ntawm ib lub cubic meter ntawm tarred ntoo.

Cov kev cai tseem ceeb siv los ntawm cov lag luam uas tsim cov rosin yog dab tsi? GOST No. 19113 - 84, tshwj xeeb, muaj cov kev cai yooj yim rau cov khoom lag luam thiab ntau qhov kev tsim khoom. Los ntawm nws peb tuaj yeem paub seb qhov zoo li cas ntawm rosin yuav tsum yog dab tsi, qhov tso cai ntom ntom, dej cov ntsiab lus, softening point, acid naj npawb, thiab lwm yam. Cov ntaub ntawv kuj qhia txog cov kev cai rau kev nyab xeeb ntawm cov txheej txheem ntau lawm (rosin yog ib qho teeb meem me ntsis. tshuaj, vim tias nws cov aerosol tuaj yeem ua rau khaus), kev lees paub, txoj hauv kev ntawm kev tshuaj xyuas cov khoom tiav, cov cai cia thiab lav.