Rosin - nws yog heev nthuav khoom

Rosin - yog amorphous, nkig tshuaj muaj ib tug glassy qauv thiab cov xim los ntawm lub teeb daj los tsaus liab. Nws yog tau tom qab distilling tawm lub volatile feem ntawm cov cob ntawm conifers. Tshuaj thaj chaw ntawm rosin (90% cob acids, xws li yooj yim - abietic) ua rau nws insoluble nyob rau hauv dej tab sis soluble nyob rau hauv ether, haus dej cawv, chloroform thiab benzene. Thaum rhuab mus 50-120 C. (rau ntau hom) rosin tuav softened.

Qhov twg puas tau lo lus "rosin"? Qhov no yog feem ntau yuav distorted lub npe ntawm lub ancient Greek nroog ntawm Colophon, nyob ib ncig ntawm uas loj hlob cov ntoo uas muab xws li ib tug yeeb tshuaj. Nyob rau hauv ancient sij hawm (ntau tshaj peb txhiab xyoo dhau los) los ntawm Turpentine resins npaj los ntawm cua sov ib tug qhuav residue yog precisely txheej thaum ub rosin substance.

Rosin - ib tug accessory, yam uas yog yog tsis yooj yim sua mus ua si, xws li cov nkauj laus ncas, viola, muab ob npaug rau cov ntses bass, Cello. Thaum muab tshuaj ntxuav nyo hau daim ntawm no substance ua free molecules uas muab ib tug tej yam adhesion rau cov hlua, li no extracting suab. Tej rosin feem ntau tsim uas tsis yog-muaj yam, cob sau tsuas yog lub caij nplooj zeeg nrog rau qhov sib ntxiv ntawm "daim card" cov khoom xyaw uas muaj txhua lawv hom (yuav muab ntxiv hlau, nyiaj los yog txawm kub hmoov av, thiab lwm yam). Nyob rau hauv tas li ntawd, lub rosin ua ntej txawm lig los plhws rau hauv lub qab xib taws ntawm kev ua si ua ntej, rau piv txwv, wrestlers thiab jockeys eeb ua ntej lub dhia.

Rosin - ib yam khoom uas twb tau lug siv thiab thov nyob rau hauv kev ua lag luam. Nyob rau hauv ua ntej lawm lub sij hawm, nws twb tau thov nyob rau hauv xab npum-siab, zus tau tej cov adhesives, kev sib khi ciab. Niaj hnub no u nrog rosin siv rau kho cov iav hlab tshwm sim tawm lub hau rau qhov siv thiab ua varnishes, printing ntawm kev ua hauj lwm nyob rau hauv brazing industries, raws li zoo raws li nyob rau hauv daim ntawv kev lag luam. Thiab qhov txhia chaw, nws siv lub ntsiab feature - lub peev xwm los tsim nplaum tebchaw thaum rhuab.

rosin ntau lawm nyob rau hauv kev tsis tau hloov dua lub millennia. Pib khoom (tarred stumps sau cob - oleoresin) yog muab tso rau hauv cubes, qhov chaw uas nws yog kho nrog chav los yog rhuab nyob rau hluav taws. Los ntawm quintal oleoresin tau txog 12 kg ntawm Turpentine (distilled) thiab 70 kg ntawm ib tug rosin, uas yog hau kom tshem tawm cov kua thiab muab tso rau hauv thawv. Yog hais tias lub tshuaj yog muab rho tawm los ntawm lub hauv paus ntoo, lawv yog pre-crushed thiab ces ib tug sib tov ntawm daim tawv nyias thiab dej yog raug extraction txheej txheem. Ib tug cubic Meter ntawm ntoo yuav tau tarred txog plaub caug kilograms ntawm rosin.

Yuav ua li cas yog lub ntsiab ntxawg seev yog siv los ntawm qhauj uas tsim rosin? № GOST 19113 - 84, nyob rau hauv particular, qhov yooj yim uas yuav tsum tau rau ib tug xov tooj ntawm cov khoom thiab ntau lawm tsis. Los ntawm nws peb yuav kawm tau dab tsi yuav tsum tsos ntawm rosin, dab tsi yog qhov tau ceev, dej cov ntsiab lus, cov softening taw tes, acid tooj, thiab lwm yam Cov ntaub ntawv tseem ntsiab lus rau kev ruaj ntseg uas yuav tsum tau ntawm cov ntau lawm txheej txheem (rosin -. Nws yog mob me me txaus ntshai yeeb tshuaj, txij li thaum nws aerosol yuav ua rau voos), kev txaus sab ntawm cov kev cai, txoj kev tsom xam ntawm cov khoom tiav, cia thiab warranty kev cai.