Warm Resistant Plastics yog dab tsi?

Cov yas yog siv thoob plaws hauv txhua lub khw vim tias lawv yooj yim ntawm kev tsim khoom, pheej yig, thiab ntau lub tsev. Tshaj thiab saum toj no cov khoom siv plastics muaj nyob rau hauv chav kawm ntawm kev tiv thaiv tshav kubyasuas tuaj yeem tuav tiv thaiv qhov ntsuas kub tsis tuaj yeem. Cov yas no yog tsim los ntawm kev siv cov ntaub ntawv uas muaj kev sib xyaw ua ke ntawm kev sov siab, kev siv lub zog, thiab kev ua haujlwm hnyav yog qhov tseem ceeb. Cov ntawv tshaj tawm no yuav qhia meej tias cov khoom siv hluav taws xob tiv thaiv hluav taws xob yog dab tsi thiab vim li cas lawv thiaj li muaj txiaj ntsig zoo.

Dab tsi yog Warmth Resistant Plastic?

Ib qho kev sov sov resistant yas feem ntau yog txhua yam yas uas muaj qhov ntsuas kub tsis tu ncua ntawm qhov siab tshaj 150 ° C (302 ° F) lossis qhov cuam tshuam ncaj qha rau ib ntus ntawm 250 ° C (482 ° F) lossis ntxiv. Hauv lwm lo lus, cov khoom lag luam tuaj yeem txhawb nqa cov txheej txheem ntawm ntau dua 150 ° C thiab tuaj yeem tiv taus cov stints luv luv ntawm lossis siab dua 250 ° C. Nrog rau lawv qhov sov sov, cov yas no feem ntau muaj cov khoom siv zoo nkauj uas feem ntau tuaj yeem phim cov hlau. Cov yas uas tiv taus cua sov tuaj yeem ua rau cov thermoplastics, thermosets, lossis photopolymers.

Plastics muaj xws li ntev molecular chains. Thaum rhuab mus, cov ntawv cog lus ntawm cov chains no puas lawm, tsim cov khoom kom thaw. Cov yas uas muaj qhov kub thiab txias qis yog feem ntau muaj aliphatic rings whereas high-temperature plastics yog tsim los ntawm cov khoom qab zib. Nyob rau hauv cov ntaub ntawv ntawm cov ntxhiab tsw, ob daim ntawv cog lus tshuaj yuav tsum tau ua kom puas (piv rau aliphatic rings 'solitary bond) ua ntej lub moj khaum tawg. Yog li, nws yog ib qho nyuaj rau yaj cov khoom no.

Ntxiv nrog rau cov hauv paus chemistry, qhov sov sov ua haujlwm ntawm cov yas tuaj yeem txhawb nqa siv cov khoom xyaw. Ntawm cov feem ntau niaj hnub additives rau kev txhim kho kub theem kuj yog iav fiber. Cov fibers kuj muaj qhov txiaj ntsig ntxiv ntawm kev ua kom tag nrho nruj thiab cov khoom siv zog.

Muaj ntau yam txheej txheem ntawm kev txheeb xyuas cov yas lub tshav kub. Qhov tseem ceeb tshaj plaws yog teev ntawm no:

• Thaum tshav kub kub Deflection Temperature Level (HDT) - Qhov no yog qhov kub thiab txias ntawm cov yas yuav ua rau muaj qhov tsis zoo nyob rau hauv ib qho kev npaj ua ntej. Qhov kev ntsuas no tsis suav txog qhov yuav tshwm sim mus sij hawm ntev ntawm cov khoom yog tias qhov ntsuas kub tau tuav rau lub sijhawm ntev.
• Iav Hloov Kub Kub (Tg) - Nyob rau hauv rooj plaub ntawm cov yas amorphous, Tg piav qhia txog qhov kub thiab txias uas cov khoom hloov pauv roj hmab lossis khov.
• Continuous Use Temperature (CUT) - Qhia qhov zoo tshaj qhov kub ntawm cov yas tuaj yeem siv tas li yam tsis muaj kev puas tsuaj loj rau nws cov cuab yeej cuab tam nyob rau lub sijhawm tsim lub neej.

Vim li cas thiaj siv cov Plastics Thaum Tshav Kub Kub Resistant?

Cov yas yog siv dav. Txawm li cas los xij, vim li cas ib tug neeg yuav siv cov yas rau cov ntawv kub kub thaum cov hlau feem ntau tuaj yeem ua tau zoo ib yam ntawm ntau qhov kub ntawm ntau hom? Ntawm no yog qee qhov laj thawj uas:

1. Qhov hnyav qis - Cov yas yog sib dua li cov hlau. Lawv yog li no zoo heev rau cov ntawv thov hauv tsheb thiab aerospace kev lag luam uas vam khom cov ntsiab lus sib zog los txhim kho kev ua tau zoo.
2. Rust Resistance - Qee cov yas muaj cov xeb zoo dua li cov hlau thaum qhia txog ntau yam tshuaj. Qhov no tuaj yeem yog qhov tseem ceeb rau cov ntawv thov uas suav nrog ob qho tib si cua sov thiab hnyav huab cua zoo li cov nyob hauv kev lag luam tshuaj.
3. Manufacturing Flexibility - Yas Cheebtsam tuaj yeem ua rau kev siv cov khoom siv hluav taws xob loj xws li kev txhaj tshuaj molding. Qhov no ua rau cov khoom uas tsis tshua muaj nqi rau ib chav tsev dua li lawv cov CNC-milled hlau counterparts. Cov khoom yas kuj tseem tuaj yeem ua rau kev siv 3D luam ntawv uas ua rau cov txheej txheem nyuaj thiab tsim kom yooj yim dua li qhov yuav ua tiav kev siv CNC machining.
4. Insulator - Cov yas tuaj yeem ua ob qho tib si thermal thiab hluav taws xob insulators. Qhov no ua rau lawv zoo tagnrho qhov twg cov khoom siv hluav taws xob tuaj yeem ua rau cov khoom siv hluav taws xob puas ntsoog los yog qhov twg cov cua sov tuaj yeem cuam tshuam tsis zoo rau cov txheej txheem.

Hom Kev Kub Kub Resistant Plastics

Muaj 2 pawg tseem ceeb ntawm cov thermoplastics - uas yog amorphous thiab semicrystalline plastics. Thaum tshav kub kub-resistant plastics tuaj yeem pom nyob rau hauv txhua pab pawg raws li qhia hauv Number 1 hauv qab no. Qhov sib txawv tseem ceeb ntawm cov 2 no yog lawv cov kev ua kom yaj. Cov khoom lag luam amorphous tsis muaj qhov taw qhia meej meej tab sis maj mam softens thaum kub nce. Ib qho khoom siv semi-crystalline, los ntawm kev sib piv, muaj qhov sib txawv heev.

Cov npe hauv qab no yog qee yam khoom ntawm kev muab los ntawmDTG. Hu rau tus neeg sawv cev DTG yog tias koj xav tau cov khoom lag luam uas tsis tau sau tseg ntawm no.

Polyetherimide (PEI).

Cov khoom siv no feem ntau nkag siab los ntawm nws lub npe lag luam ntawm Ultem thiab yog cov yas amorphous nrog tshwj xeeb thermal thiab mechanical vaj tse. Nws kuj yog nplaim resistant txawm tsis muaj cov khoom xyaw. Txawm li cas los xij, tshwj xeeb nplaim taws yuav tsum tau kuaj xyuas ntawm cov khoom cov ntaub ntawv. DTG muab ob qhov zoo ntawm Ultem yas rau 3D luam ntawv.

Polyamide (PA).

Polyamide, uas tseem tau lees paub los ntawm lub npe lag luam, Nylon, muaj lub tsev sov so zoo heev, tshwj xeeb tshaj yog thaum sib xyaw nrog cov khoom xyaw thiab cov khoom muab tub lim. Nyob rau hauv tas li ntawd, Nylon yog heev resistant rau puas. DTG muab ntau yam kub-resistant nylons nrog ntau yam khoom muab tub lim raws li qhia hauv qab no.

Photopolymers.

Photopolymers yog cov yas sib txawv uas tuaj yeem ua polymerized tsuas yog nyob rau hauv qhov cuam tshuam ntawm ib qho kev siv hluav taws xob sab nraud xws li UV teeb lossis ib qho kev kho qhov muag. Cov ntaub ntawv no tuaj yeem siv los tsim cov khoom lag luam zoo tshaj plaws nrog cov duab zoo nkauj uas tsis tuaj yeem ua tau nrog ntau yam kev tsim kho tshiab. Nyob rau hauv qeb ntawm photopolymers, DTG muaj 2 cov khoom siv hluav taws xob kub-resistant.