Rosin - ndi chidwi kwambiri zinthu

Rosin - ndi amorphous, Chimaona mankhwala ndi dongosolo kunyezimira ndi mtundu ku kuwala zachikasu wofiira mdima. Iwo analandira pambuyo distilling pa chigawo oyaka za utomoni wa conifers. Chemical katundu wa rosin (90% utomoni zidulo, kuphatikizapo zofunika - abietic) kupanga izo insoluble m'madzi koma sungunuka efa, mowa, chloroform ndi benzene. Pamene usavutike 50-120 C. (kwa mitundu yosiyanasiyana) rosin mipiringidzo ali anasintha.

Kodi mawu akuti "rosin"? Izi zambiri molakwika dzina la mzinda wakale Greek wa Colophon, kuzungulira amene adakula mitengo kupereka chinthu choterocho. Kale (zaka zoposa zikwi zitatu zapitazo) kuchokera resins turpentine anawakonzera Kutentha ndi zotsalira youma Zoonadi wosazindikira rosin mankhwala.

Rosin - ndi chowonjezera, popanda zomwe n'zosatheka kusewera, monga zeze, ndi viola, pawiri yoimba, cello. Pamene akusisita uta chidutswa cha mankhwala ici ulikubala mamolekyulu ufulu umene kupereka guluu wolimba ena kuti chingwe, potero yopezera phokoso. rosin oterewa nthawi zambiri kubala unsembe sanali mafakitale, utomoni anasonkhana yekha kugwa ndi Kuwonjezera "chinsinsi" zosakaniza amene aliyense mtundu wawo (akhoza kuwonjezeredwa zitsulo, siliva kapena fumbi golide, etc.). Komanso, rosin pamaso acimbadzoza zidendene za masewera patsogolo Mwachitsanzo, wrestlers ndi oyendetsa anakwera pamaso kulumpha.

Rosin - mankhwala kuti anali chimagwiritsidwa ntchito ndi ntchito mafakitale. Kale, kuti ananena sopo kupanga, kupanga kumatira, akusindikiza phula. Today sitima ndi rosin ntchito akukonzekera machubu galasi munapanga chipewa kupanga vanishi, kusindikiza pa ntchito mafakitale brazing, komanso makampani pepala. Ndipo kulikonse, izo zikugwira ntchito chochitika chofunika - Luso lopeka mankhwala yomata pamene usavutike.

rosin kupanga ambiri sanasinthe pa zaka. Kuyambira chuma (tarred stumps anasonkhana utomoni - oleoresin) aikidwa mu cubes, kumene mankhwala nthunzi kapena mkangano pa moto. Kuyambira oleoresin quintal analandira 12 makilogalamu turpentine (otchezedwa) ndi makilogalamu 70 rosin, amene yophika kuchotsa madzimadzi ndi kuikidwa mu muli. Ngati thunthu ndi yotengedwa chitsa, iwo ali chisanadze wophwanyidwa kenako osakaniza tchipisi ndi madzi a pansi m'zigawo ndondomeko. Wina mita kiyubiki nkhuni ndithe tarred za makilogalamu makumi anai a rosin.

ndi waukulu zida zolimbana ntchito ndi makampani yotulutsa rosin chiyani? № GOST 19113 - 84, makamaka, ndi zofunikira kwa chiwerengero cha mankhwala ndi magawo kupanga. Kwa izo tingaphunzire chiyani ayenera kuoneka kwa rosin, kodi kachulukidwe yovomerezeka zili madzi, olimbikitsa mfundo, asidi chiwerengero, etc. Chikalatachi Limanenanso kuti amafuna chitetezo cha ndondomeko kupanga (rosin - Ndi amtengo oopsa mankhwala, popeza. aerosol ake zikhoza kuyabwa), kulandira malamulo, njira Kupenda chotsirizidwa, yosungirako ndi chitsimikizo malamulo.