Menene Dumi Resistant Plastics?

Ana amfani da robobi a kusan kowace kasuwa saboda dacewar ƙera su, marasa tsada, da faɗin gine-gine. Sama da sama da robobin kayayyaki na yau da kullun akwai nau'ikan rigakafin zafin zafirobobiwanda zai iya tsayayya da matakan zafin jiki wanda ba zai iya ba. Ana yin amfani da waɗannan robobi a cikin ƙayyadaddun aikace-aikace inda cakudawar juriya mai ɗumi, ƙarfin injina, da juriya mai ƙarfi ke da mahimmanci. Wannan sakon zai fayyace menene robobi masu jure zafi da kuma dalilin da yasa suke da fa'ida.

Menene Dumi Resistant Plastics?

Filastik mai jure zafi yawanci kowane nau'in filastik ne wanda ke da ci gaba da amfani da matakin zafin jiki sama da 150 ° C (302 ° F) ko juriya kai tsaye na ɗan lokaci na 250 ° C (482 ° F) ko ƙari. A wasu kalmomi, samfurin na iya ɗaukar matakai a sama da 150 ° C kuma zai iya jure wa ɗan gajeren lokaci a ko sama da 250 ° C. Tare da juriya na zafi, waɗannan robobi yawanci suna da gidajen injiniyoyi masu ban mamaki waɗanda sau da yawa kuma suna iya dacewa da na ƙarfe. Robobi masu jure zafi na iya ɗaukar nau'in thermoplastics, thermosets, ko photopolymers.

Filastik sun ƙunshi dogayen sarƙoƙi na ƙwayoyin cuta. Lokacin da aka yi zafi, haɗin gwiwar da ke tsakanin waɗannan sarƙoƙi ya lalace, yana haifar da samfurin don narke. Filastik tare da raguwar yanayin zafi yawanci sun ƙunshi zoben aliphatic yayin da robobi masu zafi suna yin zoben ƙamshi. Game da zoben ƙamshi, haɗin sinadarai guda biyu suna buƙatar lalacewa (idan aka kwatanta da haɗin zoben aliphatic) kafin tsarin ya rushe. Don haka, yana da wuya a narke waɗannan samfuran.

Baya ga sinadarai masu tushe, ana iya haɓaka juriya na robobi ta amfani da sinadaran. Daga cikin abubuwan da aka saba da su don haɓaka juriya na zafin jiki shine fiber gilashi. Har ila yau, filayen suna da ƙarin fa'ida na ƙara jimlar ƙarfi da ƙarfin kayan aiki.

Akwai dabaru daban-daban na gano juriyar zafin filastik. An jera mafi mahimmanci a nan:

• Matsayin Ƙarƙashin Zafi (HDT) - Wannan shine yanayin zafin da filastik zai yi rauni a ƙarƙashin ƙayyadaddun kuri'a. Wannan ma'auni baya ƙididdige tasirin sakamako na dogon lokaci akan samfurin idan an riƙe wannan zafin na dogon lokaci.
• Gilashin Canjin Zazzabi (Tg) - A cikin yanayin filastik amorphous, Tg yana kwatanta yanayin zafin da kayan ke canza rubbery ko danko.
• Ci gaba da Amfani da Zazzabi (CUT) - Yana ƙayyade mafi kyawun zafin jiki wanda za'a iya amfani da filastik akai-akai ba tare da lalacewa mai yawa ba ga gidajen injin ɗin sa tsawon lokacin ƙirar ɓangaren.

Me yasa ake amfani da Filastik Resistant Heat?

Ana amfani da robobi sosai. Duk da haka, me yasa mutum zai yi amfani da robobi don aikace-aikacen zafin jiki mai zafi yayin da karfe na iya aiwatar da fasali iri ɗaya akan nau'in zafin jiki mai yawa? Ga wasu dalilan da ke cewa:

1. Ƙananan Nauyi - Filastik sun fi ƙarfin ƙarfe. Don haka suna da kyau ga aikace-aikace a cikin abin hawa da kasuwannin sararin sama waɗanda ke dogaro da abubuwa masu nauyi don haɓaka tasiri gabaɗaya.
2. Tsatsa Resistance - Wasu robobi suna da mafi kyawun juriyar tsatsa fiye da karafa lokacin da aka bayyana su zuwa nau'ikan sinadarai. Wannan na iya zama mahimmanci ga aikace-aikacen da suka haɗa da zafi da yanayin zafi kamar waɗanda ke cikin masana'antar sinadarai.
3. Samfuran Ƙirƙira - Ana iya yin kayan aikin filastik ta yin amfani da fasahar samarwa mai girma kamar gyaran allura. Wannan yana haifar da ɓangarorin da ba su da tsada a kowace raka'a fiye da takwarorinsu na ƙarfe da ake niƙa da CNC. Hakanan za'a iya yin sassan filastik ta yin amfani da bugu na 3D wanda ke ba da damar tsararrun shimfidu da mafi kyawun sassauƙar ƙira fiye da yadda za a iya samu ta yin amfani da injinan CNC.
4. Insulator - Filastik na iya aiki duka azaman thermal da insulators na lantarki. Wannan ya sa su dace inda ƙarfin lantarki zai iya lalata na'urorin lantarki masu mahimmanci ko kuma inda zafi zai iya yin mummunan tasiri akan tsarin abubuwan da aka gyara.

Nau'ikan Filastik masu jure zafin zafin jiki

Akwai manyan ƙungiyoyi biyu na thermoplastics - wato amorphous da semirystalline robobi. Ana iya gano robobi masu jure zafi a kowace ɗayan waɗannan rukunin kamar yadda aka nuna a lamba 1 da aka jera a ƙasa. Babban bambanci tsakanin waɗannan 2 shine ayyukan narkewar su. Samfurin amorphous ba shi da madaidaicin wurin narkewa amma a hankali yana yin laushi yayin da yanayin zafi ya tashi. Wani abu na Semi-crystalline, idan aka kwatanta, yana da madaidaicin narkewa.

An jera a ƙasa wasu samfuran da ake bayarwa dagaDTG. Kira wakilin DTG idan kuna buƙatar samfurin cikakken bayani wanda ba a lura dashi anan ba.

Polyetherimide (PEI).

Ana fahimtar wannan abu da sunan kasuwancin sa na Ultem kuma robobi ne na amorphous tare da keɓaɓɓen gine-ginen zafi da injina. Har ila yau, yana da juriya ga harshen wuta ko da ba tare da wani sinadaran ba. Koyaya, musamman juriyar harshen wuta yana buƙatar duba akan takardar bayanan samfurin. DTG yana ba da halaye biyu na filastik Ultem don bugu na 3D.

Polyamide (PA).

Polyamide, wanda kuma sunan kasuwanci ya san shi, Nylon, yana da kyawawan gidaje masu juriya, musamman idan an haɗa su da kayan abinci da kayan filler. Baya ga wannan, nailan yana da matukar juriya ga abrasion. DTG yana ba da nau'ikan nailan masu jure zafin jiki tare da kayan filaye daban-daban kamar yadda aka nuna a ƙasa.

Photopolymers.

Photopolymers robobi ne daban-daban waɗanda ke zuwa su zama polymerized kawai a ƙarƙashin tasirin albarkatun makamashi na waje kamar hasken UV ko wani injin gani na musamman. Ana iya yin amfani da waɗannan kayan don samar da manyan ɓangarorin da aka buga tare da rikitattun geometries waɗanda ba za su yuwu ba tare da wasu sabbin ƙira iri-iri. A cikin nau'in photopolymers, DTG yana ba da robobi 2 masu jure zafi.