Polystyrene (50 Duab): Cov Khoom Siv No Yog Dab Tsi? Daim Ntawv Thov Thiab Npaj Cov Granules, Ntom Ntom Pob Tshab Thiab Lwm Yam Polystyrene, Cov Ntsiab Lus Yaj Thiab Lwm Yam Khoom

2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2024-01-18 12:13

Ntau hom yas tau hloov pauv peb qhov kev nkag siab ntawm lub neej niaj hnub - niaj hnub no peb lub neej tsis tuaj yeem xav txog yam tsis muaj qee yam yas. Txawm li cas los xij, muaj ntau hom yas sib txawv, thiab txhua qhov ntawm nws muaj nws tus kheej cov yam ntxwv tshwj xeeb uas txiav txim siab siv cov khoom tshwj xeeb hauv qee thaj chaw. Txij li polystyrene yog ib qho ntawm cov yas nrov tshaj plaws xaiv niaj hnub no, nws tsim nyog txiav txim siab nws cov yam ntxwv zoo dua.

Cov khoom siv no yog dab tsi?

Polystyrene yog polymerized styrene, uas yog, nws yog cov khoom lag luam ntawm kev lag luam tshuaj lom neeg. Koj tuaj yeem ua tiav nws qhov kev tsim khoom siv ntau txoj hauv kev, txhua tus muaj nws tus kheej qhov zoo thiab qhov tsis zoo, thiab peb yuav txiav txim siab qhov nrov tshaj plaws hauv kev nthuav dav ntxiv hauv kab lus hauv qab no. Nyob qhov twg polystyrene tsuas muaj cov lwg me me ntawm cov tshuaj sib xws xws li carbon thiab hydrogen , tab sis nws yog tsim los ntawm cov kua styrene, uas, nyeg, tau los ntawm roj thiab thee.

Polymerized styrene zoo li nyuaj thiab ywj pheej, tsis muaj xim thiab txawm tias cov khoom siv pob tshab uas tuaj yeem khoov yam tsis tawg, thiab muaj qhov ua tau zoo heev.

Thawj thawj zaug, polystyrene tau txais nyob rau theem pib ntawm kev hloov pauv kev lag luam - nws tau paub tias xyoo 1839 nws tau tsim ua ke hauv Tebchaws Yelemees … Lwm qhov yog tias nws cov khoom tsim tawm ntawm kev lag luam pib ntau tom qab - tsuas yog xyoo 1920, thiab txawm tias tom qab thawj xyoo nws tsis tau siv li ntawd. Tsuas yog thaum Tsov Rog Ntiaj Teb Zaum Ob hauv Xeev lawv tau txaus siab rau lawv, tsim cov roj hmab dag raws li polystyrene, thiab hauv USSR kev tsim khoom lag luam ntawm cov khoom siv no tau ncua tag mus txog rau xyoo tom qab tsov rog.

Nws tsis tuaj yeem hais tias polystyrene niaj hnub no sib haum rau cov piv txwv ntawm ib puas xyoo dhau los . - nyob rau lub sijhawm no, cov kws tshawb fawb tau nrhiav txoj hauv kev los txhim kho cov khoom ntawm cov khoom. Ua tsaug rau qhov no, yas tom qab Tsov Rog Ntiaj Teb Zaum Ob tau dhau los ua ntau yam ruaj khov, suav nrog qhov ua tau zoo dua qhov cuam tshuam - qhov no dhau los ua tsaug rau kev tsim cov styrene copolymers tau los ntawm cov txheej txheem tshuaj lom neeg ntau dua.

Khoom

Qhov tseeb cov yam ntxwv ntawm lub cev ntawm polystyrene niaj hnub no yog nyob ntawm seb nws tau tsim li cas , tab sis feem ntau, thaum peb tham txog polystyrene yooj yim yam tsis muaj kev qhia meej, peb txhais tau tias yog cov khoom siv uas muaj qhov tshwj xeeb tshwj xeeb. Nws qhov ceev tsis siab tshaj (1060 kg / m

Molecular pawg cov tshuaj kuj tseem tsis tau txhais tshwj xeeb thiab muaj zog nyob ntawm txoj hauv kev kom tau txais polystyrene - nws feem ntau yog los ntawm 50 txhiab txog 300 txhiab, txawm hais tias emulsion kev hloov pauv qee zaum qhia pom tus nqi ntau dua. Solubility polystyrene yog qhov tseem ceeb hauv ntau cov tshuaj, suav nrog nws tus kheej monomer, nrog rau acetone, ntxhiab hydrocarbons thiab esters.

Nws tsis qiv nws tus kheej rau tus lej ntawm cov kuab tshuaj, suav nrog ethers, qis cawv, phenols thiab aliphatic hydrocarbons.

Polystyrene tau tshaj tawm cov khoom dielectric uas tsis hloov tsis hais txog ib puag ncig. Cov khoom siv no tseem ua rau tsis txaus ntseeg rau kev puas tsuaj ntawm cov kua qaub thiab alkalis, ntsev, cawv. Saum toj no, peb twb tau teev cov tshuaj uas tseem tuaj yeem yaj nws, thiab nws tseem oxidizes, halogenated, nitrated thiab sulfonated.

Hauv nws daim ntawv qub, yam tsis muaj tinting ntxiv, polystyrene (tsawg kawg nws muaj ntau yam thaiv) tsis tsuas yog tsis muaj xim, tab sis kuj yog pob tshab … Cov qauv siv tsis khaws lub teeb pom kev, dhau 90% ntawm nws cov nyiaj, thiab qhov no tso cai rau siv cov khoom zoo li no hauv kev tsim cov iav tsom iav. Nyob rau tib lub sijhawm, hluav taws xob ultraviolet thiab infrared tsis dhau los ntawm cov nplaim polystyrene kom ntseeg tau.

Yog tias peb txiav txim siab cov khoom ntawm polystyrene ua qhov zoo uas ua rau nws nrov nyob hauv ntau thaj chaw, ua ntej tshaj plaws, nws tsim nyog hais txog cov ntsiab lus tseem ceeb hauv qab no

• Ua ke ntawm tus nqi qis thiab yooj yim ntawm kev ua … Ntawm nws tus nqi, polystyrene tuaj yeem suav tias yog ib lub cav tseem ceeb ntawm kev vam meej niaj hnub no, muab nws cov khoom. Nws tsis yog rau tsis muaj dab tsi uas niaj hnub no muaj ntau yam khoom tau tsim nrog kev koom tes ncaj qha ntawm cov khoom no - nws yooj yim tsis muaj lwm txoj hauv kev.
• Tshuaj lom neeg ua haujlwm zoo . Feem ntau ntawm cov tshuaj uas tuaj yeem nkag rau ntawm polystyrene nto hauv lub neej txhua hnub tsis ua rau muaj kev phom sij rau nws - qhov no yog xov xwm zoo rau cov tuam ntxhab uas xav tsim cov khoom lag luam uas txawv los ntawm kev ua haujlwm ntev. Nyob rau tib lub sijhawm, hauv chav kuaj tshuaj, nrog cov txheej txheem zoo ntawm cov tshuaj reagents ntawm tes, nws tsis nyuaj rau yaj polystyrene.
• Cov tshuaj lom yog qhov nyab xeeb . Polystyrene tawm me ntsis ntawm cov pa phem thiab los ntawm ib puag ncig kev pom, nrog qee qhov tshwj tseg, suav tias tsis muaj kev phom sij. Tsawg kawg, cov kws tshaj lij tsis tso tawm ib qho kev txwv ntawm kev siv cov khoom siv polystyrene sab hauv thaj chaw nyob, thiab txawm tias cov tais diav polystyrene tuaj yeem ua tau.
• Ntau yam kev siv … Vim nws qhov zoo, yooj yim ntawm kev ua thiab zas xim, polystyrene tuaj yeem siv ua raw khoom rau kev tsim khoom ntawm txhua yam.

Nrog txhua qhov zoo ntawm polystyrene, nws kuj muaj txwv , thiab txawm hais tias tsis muaj ntau ntawm lawv, qee zaum lawv ua lub luag haujlwm tseem ceeb heev.

Ua ntej tshaj plaws, kev ua kom sov dhau rau cov yas no yog qhov txaus ntshai, thiab txawm tias nyob hauv cov xwm txheej hauv tsev koj tseem yuav tsum xav txog qhov twg koj tuaj yeem siv polystyrene thiab qhov twg koj yuav tsum tsis txhob. Ib qho ntxiv, rau feem ntau hom khoom siv, ntxiv rau kev tiv taus kev poob siab, cuam tshuam ua rau muaj kev phom sij loj, thiab feem ntau, kev tsis taus yog qhov teeb meem.

Sib piv nrog polypropylene

Ib qho ntawm cov neeg sib tw tseem ceeb ntawm polystyrene yog lwm cov polymer nrov - polypropylene … Hauv qee thaj chaw, xws li kev tsim cov khoom ntim, lawv yog cov sib tw ncaj qha, tab sis qhov sib txawv ntawm ob qho khoom siv yog qhov tseem ceeb heev. Nws tsim nyog pib tsawg kawg nrog qhov tseeb tias polystyrene nyuaj rau rov ua dua , thiab txawm hais tias koj tuaj yeem hnov ntau zaus tias nws muaj kev nyab xeeb, ib puag ncig tseem nyiam nrhiav qhov ua txhaum nrog nws.

Polypropylene tseem tsis muaj kev txhaum, tab sis tseem muaj qee lo lus nug me ntsis rau nws, thiab nws yooj yim dua rau rov ua dua. Yog tias peb tham txog qhov zoo ntawm lub cev ntawm ob yam khoom, tom qab ntawd polypropylene tseem yog tus yam ntxwv los ntawm kev ua kom yooj yim dua - qhov twg polystyrene twb tau tawg lossis tawg, malleable polypropylene tsuas yog khoov. Raws li rau tus nqi, polystyrene, tej zaum, yuav poob kev sib tw rau nws cov neeg sib tw ntev dhau los, tab sis ntau dua tus nqi qis Yog qhov tseem ceeb uas ua rau nws nyob deb deb.

Pom qhov sib txawv ntawm ib qho mus rau lwm qhov tsis nyuaj li, tab sis koj yuav tsum paub saib dab tsi. Polystyrene zoo nkauj dua nws yog ci thiab ci, tsis muaj xim ntxiv nws zoo li pob tshab, txawm hais tias nws tuaj yeem muaj tus yam ntxwv txias txias ntawm xiav. Polypropylene zoo li me ntsis qias neeg vim nws pos huab ., lub teeb tawg ua kom zoo dua qub. Koj tseem tuaj yeem paub qhov txawv ntawm ob yam ntaub ntawv los ntawm kev siv: polystyrene yog sonorous thiab tso tus yam ntxwv nyem thaum ntaus, thaum polypropylene suab muffled.

Puas yog teeb meem rau tib neeg?

Polystyrene yog ib qho ntawm cov ntaub ntawv muaj teeb meem tshaj plaws ntawm kev ntsuas kev phom sij thiab txaus ntshai rau kev noj qab haus huv . Ntawm qhov one tes, nws tau siv dav hauv tib neeg lub tsev thiab txawm tias tsim cov tais diav, uas twb tau qhia lawm tias qhov no tsis raug txwv. Ntawm qhov tod tes, ntau cov lus hu mus nug cov phooj ywg ib puag ncig ntawm yas hais txog feem ntau yog polystyrene. Nws yuav ncaj ncees hais tias, thaum tsis yog qhov txaus ntshai tshaj plaws ntawm cov ntaub ntawv uas twb muaj lawm, nws tseem tsis tuaj yeem suav tias yog kev nyab xeeb ib yam - nws tsis tuaj yeem siv tau zoo li ntawd.

Nws yuav tsum nkag siab tias styrene, uas yog cov khoom siv raw rau kev tsim cov polystyrene, suav tias yog tshuaj lom heev.

Polystyrene tuaj yeem tso tawm tsis muaj ntau yam tshuaj lom uas yuav tsis cuam tshuam rau tib neeg kev noj qab haus huv ntau , tab sis qhov no tsuas yog tsuav koj tsis nyob hauv kev sib cuag nrog nws, thiab kom txog thaum nws kub. Qhov kub siab dua, thaj chaw muaj kev phom sij ntau dua nrog cov khoom polystyrene, tshwj xeeb tshaj yog tias hluav taws tau pib thiab cov khoom siv tau hluav taws. Feem ntau ntawm txhua qhov, cov pa tshuaj cuam tshuam rau lub siab, tab sis teeb meem tuaj yeem ua rau lub plawv thiab lub ntsws, thiab qee tus kws tshaj lij ntseeg tias kev nqus pa ntawm styrene vapors ua rau muaj kev txhim kho kab mob siab.

Koj yuav tsum nkag siab tias polystyrene thiab polystyrene sib txawv: txhawm rau txhim kho cov yam ntxwv ntawm cov yas, cov chaw tsim khoom tuaj yeem ntxiv ntau yam yas yas, dyes, thiab lwm yam ntxiv uas cuam tshuam rau lub zog thiab kev ywj pheej rau cov khoom.

Hauv qee kis, cov tshuaj ntxiv no tuaj yeem ua rau muaj kev phom sij ntau dua li styrene nws tus kheej, thiab cov chaw tsim khoom yuav tsis qhia ntxiv cov ntaub ntawv phom sij ntxiv kom tsis txhob poob cov neeg siv khoom.

Thaum saum toj no peb hu ua polystyrene muaj kev nyab xeeb, peb txhais tau tias muaj lwm yam, txawm tias cov khoom lag luam muaj kev phom sij ntau dua ntawm tib neeg kev ua, uas peb tseem tsis tuaj yeem tso tseg - piv txwv li, tso tsheb. Ib qho ntxiv, hauv kev xav, polystyrene tuaj yeem siv tau yuav luag muaj kev nyab xeeb - muab tias koj paub thiab nruj ua raws cov lus qhia, tshwj xeeb, tsis yog los ntawm kev txhawb cua sov ntawm cov khoom, tab sis los ntawm kev tiv thaiv nws los ntawm nws. Tab sis txawm yog li ntawd Koj yuav tsum tsis txhob hnov qab polystyrene ua cov khoom muaj kev nyab xeeb kiag li, vim tias txawm nyob hauv lub ntiaj teb yas, uas tau txais kev thuam ntau thiab ntau dua nyob rau xyoo tas los no, polystyrene tsis muaj kev nyab xeeb tshaj plaws.

Hom kev txheeb xyuas

Rau tam sim no rau kev tsim cov polystyrene, ntau txoj hauv kev tau siv cov khoom xav tau, thiab hais txog nws cov khoom, qhov ua tiav yuav tsis zoo ib yam. Kom nkag siab tias nws ua haujlwm li cas, Cia peb saib txhua ntawm peb txoj hauv kev nrov.

Txhua ntawm cov ntaub ntawv no muaj cov cim nrog cov yam ntxwv tshwj xeeb ntawm txoj hauv kev kom tau txais polystyrene.

Emulsion

Hnub no txoj kev twb tau dhau los lawm thiab tsis siv hauv kev tsim khoom … Lub hauv paus ntsiab lus ntawm kev ua haujlwm yog raws li hauv qab no: ua ntej, styrene tau ua kom huv los ntawm cov tshuaj tiv thaiv, tom qab ntawd nws tau sib xyaw hauv cov dej nrog emulsifiers (ntsev ntawm cov rog thiab sulfonic acids, xab npum), nrog rau cov pib polymerization - potassium persulfate thiab hydrogen dioxide. Thaum ua kom sov txog 85-95 degrees, cov tshuaj lom tshwm sim - txheej txheem polymerization maj mam, uas tau txiav txim siab ua tiav yog tias cov tshuaj styrene poob qis dua 0.5%.

Qhov ua kom emulsion yog tom qab ntawd coagulated nrog kev daws ntawm sodium sodium chloride zoo tib yam thiab raug rau kom qhuav, vim yog qhov ua kom cov hmoov zoo, txhua cov granule uas muaj qhov loj me tsis pub tshaj 0.1 hli. Txawm hais tias polystyrene feem ntau piav raws li dawb thiab pob tshab, txoj hauv kev no yuav tsis tuaj yeem ua tiav cov yam ntxwv no . - cov pob muaj xim daj, qhia tias muaj alkali tsis huv, uas tsis tuaj yeem tshem tawm tau.

Txawm hais tias txoj hauv kev tsis muaj neeg nyiam niaj hnub no, nws yog qhov tseeb uas tau muab cov tshuaj nrog qhov hnyav tshaj plaws tuaj yeem ua rau hnyav.

Kev ncua

Lwm txoj hauv kev uas twb tau txiav txim siab dhau lawm, txawm hais tias nws tseem suav tias tsim nyog rau rov ua dua polystyrene rau hauv copolymer xws li nthuav polystyrene. Rau kev tsim khoom, npaj styrene xav tau, lossis theej, nws raug tshem tawm hauv dej, magnesium hydroxide, polyvinyl cawv, sodium polymethacrylate thiab cov pib ua polymerization. Tag nrho cov no tau xa mus rau lub reactor, qhov twg cov tshuaj tau nquag sib xyaw nrog cov cua sov maj mam nce mus txog 130 degrees thiab siab. Tom qab ntawd, qhov kev tshem tawm tseem yuav tsum tau ua rau kev ua haujlwm centrifuge, thiab tsuas yog tom qab ntxuav thiab ziab cov khoom sau, polystyrene tau txais.

Thaiv

Txoj kev no tam sim no suav tias yog qhov nrov tshaj plaws thiab muaj feem cuam tshuam, thiab feem ntau ntawm polystyrene niaj hnub no tau tsim los ntawm txoj kev no . Lub hauv paus yog qhov yooj yim heev: cov khoom tsim tawm yog cov khoom siv ntshiab, zoo tagnrho cov teeb pom kev zoo tsis, tshwj xeeb los ntawm kev ruaj ntseg ntawm qhov ntsuas. Nyob rau tib lub sijhawm, kev siv thev naus laus zis hauv kev txiav txim siab yog ob qho tib si muaj txiaj ntsig thiab lav tau yuav luag tsis tiav ntawm cov khoom pov tseg.

Thaiv kev tsim cov polystyrene yog ua raws kev sib xyaw styrene hauv benzene nruab nrab hauv ob theem - thawj zaug ntawm qhov kub li ntawm 90 degrees, thiab tom qab ntawd nrog cua sov maj mam los ntawm 100 txog 220. Thaiv kev tsim khoom raug nres ntawm theem thaum txog 85% ntawm styrene huab hwm coj tau hloov mus ua polystyrene. Kev tshem tawm cov styrene uas tsis muaj sijhawm rau polymerize yog nqa tawm siv lub tshuab nqus tsev.

Thov

Polystyrene tau siv rau ntau qhov chaw ntawm tib neeg kev ua ub no thiab tseem siv los ua cov khoom siv tes ua los ntawm koj txhais tes. Nyob hauv tsev cov khoom plig me me tau ua los ntawm nws, siv laser txiav, milling, pleev xim rau xim twg los xij - los ntawm liab rau kub thiab dub, thiab qee zaum - thiab luam tawm ntawm polystyrene nto. Daim ntawv thov dav dav ntawm polystyrene tau pom hauv kev tsim kho , qhov twg nws tau siv los ua phab ntsa vaj huam sib luag thiab qab nthab vuas, ntau ntu thiab baguettes. Hauv daim ntawv, cov khoom siv no tseem tuaj yeem siv rau sab nrauv. Thaum kawg, los ntawm cov khoom siv no, lawv tsim cov neeg nyiam tam sim no polystyrene qhob.

Rooj tog kev lag luam kuj tseem siv cov ntaub ntawv no ntau dua thiab nquag, txawm hais tias tam sim no nws tsis yog tus sib tw ntoo thiab nws cov khoom siv. Txawm li cas los xij, qhov twg cov av noo siab, nws tau siv tas li - piv txwv li, lub tais da dej tuaj yeem ua tiav los ntawm nws hnub no. Ib qho ntxiv, polystyrene granules tau siv zoo li muab tub lim hauv ncoo , thiab rau cov hom phiaj no tau muag npaj ua hauv hnab.

Rau ib tus neeg zoo tib yam, ntau yam zaub mov ntawm polystyrene tau paub zoo tias yuav luag yog cov khoom tseem ceeb. rau kev tsim cov tais diav pov tseg … Feem ntau ntawm cov khob yas uas nrov heev rau lub raj mis dej haus niaj hnub no yog tsim los ntawm nws. Ib qho ntxiv, cov zaub mov qib polystyrene tau hnyav siv raws li ntim khoom vim nws tus nqi qis thiab tus txheeb ze muaj zog. Xav txog cov khoom siv hluav taws xob ntawm cov khoom siv, nws tsim nyog sau cia tias nws kuj tau pom dav siv hauv hluav taws xob engineering.

Tib lub sijhawm, qhov tseeb, muaj ntau txoj hauv kev xaiv rau siv cov khoom lag luam polystyrene uas nws yooj yim tsis tuaj yeem sau lawv txhua tus.

Yuav ua haujlwm nrog nws li cas?

Hauv lub neej txhua hnub, feem ntau koj yuav tsum ua haujlwm nrog ntawv polystyrene , uas tuaj yeem ua tiav ob qho tib si hauv tshuab thiab cua sov. Kev tsim los ntawm dabtsi yog khoov, gluing, txiav thiab drilling tuaj yeem yog ob qho tib si yam khoom zoo tib yam thiab cuam tshuam tiv taus ib qho. Ib qho jigsaw zoo tib yam tau siv los ua ib daim ntawv tsawg dua 2 hli tuab, thaum cov ntawv tuab tuaj yeem nqa nrog lub zom lossis cov cuab yeej siv tes. Hauv kev cob qhia kev lag luam laser txiav yog ua tau . Cov kab txiav tawm los ua ragged me ntsis, yog li nws yuav tsum tau ua tom ntej - nws yog thawj zaug dhau nrog cov ntaub ntawv, thiab tom qab ntawd nrog emery.

Yog tias nws yog qhov tsim nyog los ua lub qhov hauv daim ntawv, siv lub laum, uas koj xav tau lub laum tsim tshwj xeeb rau cov ntawv yas yas. Yog tias cov tuab ntawm daim ntawv me me, thaum lub sijhawm drilling nws tuaj yeem cuam tshuam qhov kev xav tau ntawm tus tswv - koj tuaj yeem zam qhov kev txhim kho ntawm cov xwm txheej los ntawm kev tso ntoo thaiv hauv qab daim ntawv. Cov ntawv yog tsim los ntawm cov txheej txheem nqus los yog tshuab cua hauv siab. Kev ua tiav los ntawm ib qho ntawm cov txheej txheem qhia cuam tshuam tseem ceeb (txog 160-200 degrees) cua sov ntawm cov khoom.

Kev sib txuas ntawm cov khoom ib leeg ua los ntawm polystyrene raug tso cai ob qho los ntawm kev siv vuam thiab gluing. Hauv ob qho tib si, ua ntej koom nrog qhov tawg ntawm qhov chaw, koj yuav tsum xub ua tib zoo degrease. Nws yog qhov tsim nyog los ua noj los ntawm roj lossis txheej txheem ultrasonic, rau kua nplaum - nrog cov khoom sib xyaw polymer raws li cyanoacrylate lossis neoprene.

Yog tias peb tham txog matte polystyrene, tom qab ntawd nws tseem tuaj yeem ua raws li hom kev ua haujlwm zoo li sib tsoo thiab polishing . Txog qhov no, siv lub tshuab zom zom, tab sis tsis muaj qhov cuam tshuam nrog lub log tawg - hloov pauv, siv lub log muag muag, uas tau siv tshwj xeeb polishing muab tshuaj txhuam. Yog tias qhov me me, koj tuaj yeem txhuam lossis zom nws ntawm tes.

Ntawm lwm yam, ib qho txheej tshwj xeeb tuaj yeem thov rau polystyrene nto – los ntawm txheej hlau mus rau zaj duab xis iav . Nws tuaj yeem luam tawm ntawm nws hauv xim dub lossis xim, ib yam ntawm txoj kev paub. Nyob rau tib lub sijhawm, txhawm rau tiv thaiv cov ntawv los yog cov duab, nws yog qhov tsim nyog qhib qhov saum npoo nrog cov kua roj vanish, vim hais tias cov polymer tsis nqus dej noo.

Ua

Hauv nws daim ntawv dawb huv, polystyrene tsis zoo li ua rau muaj kev phom sij ntau rau ib puag ncig, tab sis tib lub sijhawm, nws pov tseg, zoo li nws yuav tsum yog yas, ua rau lub sijhawm loj heev, ua rau lub ntiaj teb tsis zoo .… Ib qho ntxiv, nyob hauv ib puag ncig ib puag ncig, cov polymer thiab nws cov copolymers tuaj yeem raug cua sov ntau dhau, suav nrog kev tua hluav taws, thiab tom qab ntawd qhov tshwm sim tuaj yeem ua rau muaj kev kub ntxhov ntau dua. Ib yam nkaus, kev tiv tauj tsis tau ntawm cov khoom polystyrene nrog cov tshuaj muaj peev xwm yaj cov khoom yog qhov tsis xav tau, txwv tsis pub tso cov pa phem ntawm styrene, benzene, toluene, carbon monoxide thiab ethylbenzene tsis tuaj yeem zam tau.

Qhov txheeb ze qhov zoo ntawm cov khoom siv yog qhov ntawd nws tuaj yeem siv tau ntau zaus , siv ob qho tib si pov tseg ncaj qha thiab tsuas yog hnav cov khoom lag luam los ntawm nws. Extrusion, nias thiab casting yog siv ua cov txheej txheem. Thaum tawm mus, cov khoom lag luam tau txais uas tsis zoo dua li cov khoom tshiab, thaum tsis muaj cov khib nyiab tsim. Ib qho ntxiv, nyob rau xyoo tas los no, cov khoom siv hauv tsev tshiab tau ua los ntawm cov polystyrene - polystyrene qhob , uas tsim nyog rau kev tsim kho qis. Hmoov tsis zoo, cov khoom pov tseg polystyrene loj heev, tshwj xeeb tshaj yog nyob hauv cov tebchaws txom nyem, tsuas yog tau hlawv. Tus cwj pwm no nrog cov yas pov tseg tsis zoo rau ib puag ncig.