Ntau yam nyob ib puag ncig peb muaj cov npe nrov thiab cov npe zoo nkauj.Piv txwv li, cov nroj tsuag ntsuab feem ntau hu ua "Lala seedlings" yog elegantly hu ua "humus".Qhov tseeb, cov yas kuj muaj cov npe zoo nkauj.
Plastics yog monomers li raw cov ntaub ntawv thiab polymerized los ntawm polyaddition los yog polycondensation.Lawv muaj nruab nrab tsis kam mus deformation thiab yog nruab nrab ntawm fibers thiab roj hmab.Lawv yog tsim los ntawm hluavtaws resins thiab muab tub lim, plasticizers, stabilizers, lubricants., pigments thiab lwm yam additives.Lub ntsiab ntawm cov yas yog resin.Resin hais txog cov khoom siv polymer uas tsis tau tov nrog ntau yam khoom ntxiv.Lub sij hawm resin yog Ameslikas lub npe hu ua lipids secreted los ntawm cov tsiaj thiab nroj tsuag, xws li rosin thiab shellac.Resin suav txog li 40% txog 100% ntawm tag nrho qhov hnyav ntawm cov yas.Cov yam ntxwv ntawm plastics feem ntau yog txiav txim siab los ntawm qhov xwm txheej ntawm cov resin, tab sis cov khoom ntxiv kuj ua lub luag haujlwm tseem ceeb.Qee cov yas yog tsim los ntawm cov khoom siv hluavtaws, tsis muaj lossis me me ntxiv, xws li plexiglass.
Lub npe elegant ntawm yas yog: hluavtaws cob.Synthetic resin yog ib hom khoom siv hluavtaws hluavtaws polymer.Nws yog ib yam ntawm cov resin uas muaj los yog tshaj cov yam ntxwv ntawm lub ntuj cob.Nws daim ntawv thov tseem ceeb tshaj plaws yog kev tsim cov yas.Txhawm rau pab txhawb kev ua haujlwm thiab txhim kho kev ua tau zoo, cov khoom siv ntxiv feem ntau yog ntxiv, thiab qee zaum lawv tau siv ncaj qha rau kev ua, yog li lawv feem ntau ua ke nrog cov yas.Hauv kev siv tswv yim, lawv tau siv ua ke nrog cov yas.
Yog li, cov phooj ywg, thaum tib neeg tham txog cov khoom siv hluavtaws, nco ntsoov tias lawv tau tham txog yas ~
Post lub sij hawm: Nov-12-2022