Keeb Kwm
Cov kws hu ua German hu ua Arthur Eichengrün thiab Theodore Becker tau ua thawj cov kua tshuaj hauv cellulose acetate hauv 1903, uas muaj ntau yam tsawg tshaj li cov cellulose nitrate. Nws yog qhov kawg tau muaj nyob rau hauv ib daim ntawv hmoov uas nws tau pib txhaj tshuaj molded. Arthur Eichengrün tau tsim thawj koob tshuaj molding xovxwm thaum xyoo 1919. Nyob rau xyoo 1939, Arthur Eichengrün tau txais qhov kev txhaj tshuaj molding ntawm plasticised cellulose acetate.
Kev lag luam nthuav sai heev hauv lub xyoo 1940 vim World War II tau tsim kom muaj kev lag luam loj heev rau cov khoom lag luam, cov khoom siv ua khoom loj loj. Hauv Xyoo 1946, American Watertown James Watson Hendry ua thawj zaug ntsia hlau cav, uas tau tso cai ntau ntxiv txog kev ceev thiab qhov zoo ntawm cov khoom tsim. Lub tshuab no kuj pub khoom siv ua ntej yuav mus txhaj tshuaj, yog li ntawd cov xim dawb los yog txum ntim yas yuav muab ntxiv rau cov khoom tseem ceeb thiab muab sib xyaw ua ntej txhaj koob tshuaj. Niaj hnub no, ntsia tho tshuaj cav rau feem coob ntawm txhua cov cav tov. Nyob rau xyoo 1970, Hendry tau mus tsim thawj qhov kev siv tshuaj tiv thaiv roj, uas tso cai rau ntau txoj hauv kev, khoob khoob khawm uas txias sai heev. Qhov no zoo heev tsim tsim kev yooj yim nrog rau lub dag lub zog thiab qhov kawg ntawm cov khoom sib dhos thaum txo lub sijhawm ntau lawm, nqi, hnyav thiab khib nyiab.
Txoj kev txhaj tshuaj yas molding lag luam muaj hloov zuj zus xyoo los ntawm kev ua zauv thiab cov nyees khawm los ua cov khoom lag luam loj heev rau cov lag luam xws li automotive, kev kho mob, aerospace, khoom siv, khoom ua si, kav dej, ntim, thiab kev tsim kho.