Dab tsi yog qhov sib txawv ntawm cov hnab yas nrog cov khoom siv biodegradable thiab cov hnab yas zoo tib yam?
Biodegradable yas hais txog ib hom yas uas degraded los ntawm kev ua ntawm cov kab mob nyob rau hauv cov xwm, xws li cov kab mob, pwm (fungi) thiab algae. Cov yas zoo tshaj plaws biodegradable yog ib yam khoom siv polymer nrog kev ua tau zoo, tuaj yeem decomposed los ntawm ib puag ncig cov kab mob tom qab muab pov tseg, thiab thaum kawg inorganicized los ua ib feem ntawm cov pa roj carbon monoxide nyob rau hauv qhov xwm txheej." Ntawv" yog ib yam khoom siv biodegradable, thaum" hluavtaws hluavtaws" yog ib yam khoom siv polymer. Yog li ntawd, biodegradable plastics yog cov ntaub ntawv polymer nrog ob qho tib si" ntawv" thiab" hluavtaws hluavtaws" khoom.
Biodegradable plastic, also known as biodegradable plastic, refers to the action of microorganisms existing in nature under natural conditions such as soil and/or sand, and/or specific conditions such as composting conditions, anaerobic digestion conditions, or aqueous culture fluids. It causes degradation, and finally completely degrades into carbon dioxide (CO2) or/and methane (CH4), water (H2O) and mineralized inorganic salts of the elements contained therein, as well as new biomass plastics.
Plastics yog cov khoom sib xyaw polymer (macromolecules) ua los ntawm cov monomers los ntawm cov khoom siv raw los ntawm kev ntxiv polymerization lossis polycondensation cov tshuaj tiv thaiv. Lawv muaj nruab nrab deformation tsis kam thiab nyob nruab nrab ntawm fiber ntau thiab roj hmab. Lawv yog tsim los ntawm hluavtaws resins, muab tub lim, plasticizers, thiab stabilizers. Nws yog tsim los ntawm additives xws li cov neeg ua hauj lwm, lubricants, thiab pigments.
Lub ntsiab ntawm cov yas yog resin. Resin yog 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 nroj tsuag thiab tsiaj txhu, xws li rosin thiab shellac. Cov 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, polystyrene, thiab lwm yam.
Yog xav paub ntxiv PVA zaj duab xis thiab hnab khoom thov mus ntsib peb:
http://www.joyful-printing.net/pva-bag/
http://www.joyful-printing.com/pva-bag/