Polybutylene terefththatal (PBT) yana ko'ina, daga motarka zuwa lantarki. Amma menene daidai? Wannan yanayin Injiniya na Semi-Crystalline Thermoplalast shine ga dangin Polyester kuma yana ba da ma'auni na ƙarfi da karko.
A cikin wannan post, zamu bincika abin da ke sa pbt na musamman, kadarorinta, hanyoyin sarrafawa, da yadda ake amfani dashi a kan masana'antu da lantarki.
Menene polybutylene terepththathatal (PBT)?
Polybutylene terephthater (PBT) shine thermoplasticarfin thermoplastic a cikin dangin Polyester. An san shi ne da ƙarfin sa, sassauci, da juriya ga sunadarai. Saboda waɗannan kaddarorin, ana amfani da PBT sosai a cikin mota, lantarki, da aikace-aikacen masana'antu.
Abubuwan sunadarai da tsarin PBT
Tsarin sunadarai na PBT yana wakiltar tsarin (C12H12o4) n. Polymer ya kunshi dogon sarƙoƙi da aka kafa ta hanyar EST. Waɗannan shaidu suna ba da kayan da ƙaurarta da juriya na zafi, wanda ya dace da mahimmancin mahalli. Tsarinsa na Semi-crystalline yana ba da kwanciyar hankali na girma, ma'ana yana riƙe da sifar ta koda a ƙarƙashin damuwa.
Tsarin kwayar halittar polybutylene
Abubuwan haɗin maharawa sun haɗa:
1,4-Butiandiol (BODO) : yana ƙara sassauci da taimako a cikin juriya na sunadarai.
Terephthal acid (TPA) ko DimmylLyl Terephthatorate (DMT) : Ba da tsayayye da tsarin sahihanci.
Kira na PBT
Samun PBT ya ƙunshi martanin Polycylation tsakanin Dimethyl Gererphthating (DMT) ko Terephthazal acid (TPPA) da 1,4.
Kayan Kayan:
AYNTHESESIS yana farawa da amsawa mai haɗuwa, inda BODO ke ɓoye tare da DMT ko TPA. Lokacin amfani da DMT, ana samar da methanol azaman samfurin. Tare da tpa, ana fitar da ruwa. Binciken mai zuwa yana cire wuce haddi BOD, yana haifar da ƙirƙirar ɗakunan polymer mai tsayi ta hanyar sanannun halayen.
Umurori:
Dmt dauki:
TPA dauki:
Waɗannan halayen suna faruwa a matsanancin yanayin, yawanci tsakanin 230 ° C da 250 ° C , da kuma a ƙarƙashin yanayin wuri. Hakanan za'a iya amfani da castyststs don hanzarta hanzari da tabbatar da mafi girman nauyi kwayoyin.
| samfurin | -samfurin | Nau'in nau'in |
| DMT tare da BOD | Methanol | 230-250 ° C, Vacuum |
| TPA tare da BOD | Ruwa | 230-250 ° C, Vacuum |
Wannan tsari na Polycondation shine mabuɗin don ƙirƙirar mai dorewa, sarƙoƙin polymer mai tsayayya da zafi wanda ke bayyana PBT.
PBT a matsayin memba na dangin Polyester
A matsayin Polyester, PBT na hannun jari kamance da sauran polyesters kamar Polyethylene terephthatal (Pet) . Koyaya, yana sanya kanta ta hanyar saurin crystallization da kuma ƙananan ƙarfin aiki. Wannan yana ba da damar da za a gyara cikin siffofi mai sauƙi. Idan aka kwatanta da sauran polyesters, PBT yana da manyan abubuwan kayan masarufi da ke da sinadarai na sinadarai, sa cikakke ga sassan da aka fallasa mai, man da kuma yanayin zafi, da babban yanayin zafi.
Kaddarorin PBT
PBT na nuna hade na musamman na kaddarorin da suka sanya ta dace da aikace-aikace daban-daban. Bari muyi kusanci da halayensa mabuɗin.
| Bayanin | Kayan Kayan | Alƙir |
| Properties na jiki | Yawa | 1.31 g / cm³ |
| Iyakance rubutun oxygen | 25% |
| Danshi karfin (24 hours) | 0.08% -0.1% |
| Ado mai kyau | M |
| UV juriya | M |
| Kayan aikin injin | Da tenerile | 40-50 MPa |
| Modulal modulir | 2-4 GPA |
| Elongation a hutu | 5-300% |
| Creep juriya | High a daukaka |
| Properties na Thermal | Tsabtaccen yanayin zafin jiki (HDT) | 115-150 ° C (a 0.46 MPA); 50-85 ° C (a 1.8 MPA) |
| Max ci gaba da yawan zafin jiki | 80-140 ° C |
| Juriya kashe gobara | Akwai shi a cikin maki-resistant resistant |
| Madaidaitan yaduwar zafi | 6-10 x 10⁻⁵ / ° C |
| Kaddarorin lantarki | Karfin sata | 15-30 kV / mm |
| @ 1 khz | 2.9-4 |
| Yawan Kariya | 14-17 x 10⊃1; ⁵ Ohm.cm |
| Juriya na sinadarai | Juriya ga sinadarai | Studentarfafa juriya ga diluted acid, giya, hydrocarbons, gyare-gyare, mai |
| UV da Dabo juriya | M |
| Juriya ga abubuwan karfin gwiwa na kwayoyin, mai | M |
Properties na jiki
PBT yana ba da kyakkyawan kwanciyar hankali na girma, har ma a ƙarƙashin yanayin muhalli. Yana da ƙananan ƙwaƙwalwar danshi na danshi, galibi kusan 0.1% bayan hours 24 na nutsewa.
Wannan ƙarancin danshi Uptake yana ba da gudummawa ga ƙarfinsa a ƙarƙashin matsanancin damuwa da kuma yanayin sinadarai masu guba. PBT na iya kula da sifarta da aikinsa wajen zama yanayi.
Kayan aikin injin
Pbt yana fafutukar ƙarfi, ta da tauri da tauri. Anan akwai wasu alamomi masu yawa:
| dukiya | darajar |
| Da tenerile | 50-60 MPA |
| Modulal modulir | 2.3-2.8 GPA |
| Elongation a hutu | 50-300% |
PBT kuma yana nuna kyakkyawan ƙarfin tasiri. Zai iya tsayayya da ɗumbin kwatsam ba tare da fatattaka ko fashewa ba.
Wani muhimmin fasalin shine juriya na Creep. PBT na iya kula da kamanninta a koyaushe damuwa, ko da a tsawan yanayin zafi.
Properties na Thermal
PBT tana da babban yanayin zafin jiki (HDT) idan aka kwatanta da yawancin filastik injiniyoyi. Misali, a nauyin MPa 1.8, HDT ya kusan 60 ° C, yayin da Polypropylene ne kawai 50 ° C.
Hakanan yana da girman yawan zafin jiki na zazzabi, yana nuna ikon sa na riƙe kayan aikin a tsayin yanayin zafi. PBT na iya yin jifa da balaguron balaguron bala'i na ɗan gajeren lokaci da kuma bayyanuwar zafi na lokaci ba tare da lalatattun lalata ba.
Kaddarorin lantarki
PBT tana ba da babban juriya da lantarki da ƙarfinsu. Wadannan kaddarorin suna sanya shi da kyau don inforing abubuwan lantarki.
Yana kare kan fitar da fitarwa, ruwa, da rushewa cikin murmurewa mai nauyi. PBT's Lowyarancin mummunan rauni shima yasa ya dace da aikace-aikacen lantarki mai yawa.
Juriya na sinadarai
PBT na nuna juriya ga manyan sunadarai, ciki har da:
Acid
Giya
Hydrocarbons
Ƙanshi mai ƙanshi
Mai da man shafawa
Wannan juriya na sunadarai yana sa PBT ya dace da sassan da aka fallasa su ga abubuwan da ke tattare da abubuwan sha da ke ciki, man fetur, da mai. Zai iya kula da amincinta a cikin mahalli masu rikitarwa.
PBT kuma yana ba da juriya UV na UV, hana lalata daga bayyanar hasken rana. Juyinsa Juyinsa ya ci gaba da inganta yanayinta da roko na ado.
Nau'in da gyare-gyare na PBT
Bagage PBT maki
Grades marasa rinjaye sune ainihin tsari na kayan ba tare da wani ƙari ba. Suna bayar da ma'auni na kaddarorin da suka dace da aikace-aikace da yawa.
Waɗannan maki suna zuwa cikin yawan narkewar narkewar narke, suna ba da sassauci aiki don allurar da keɓaɓɓe.
Fatar Fiber Karanta PBT
Fiber fiber karfafa pbt wata sigari ce. Bugu da kari na gilashi na gilashi muhimmanci inganta kayan aikin na kayan.
Stringarfin tenarfafa, myexural modulir, da ƙarfin rikitarwa na iya ƙaruwa da 2 zuwa 3 idan aka kwatanta da maki mara rinjaye. Wannan yana sa gilashin FILT ya ƙarfafa PBT da ya dace don aikace-aikacen tsarin tsari.
Abun cikin fiber na iya bambanta, yawanci yana kama daga 10% zuwa 50%. Mafi girman abun ciki na Fiber yana haifar da ƙarfi da tauri amma tazara amma an rage karkara.
Ma'adinai mai cike da ma'adinai
FLOlers ma'adinai, kamar su taldo da alli na carbonate, za'a iya ƙara zuwa PBT. Wadannan fannonin suna inganta kwanciyar hankali da rage shrinkage yayin gyarawa.
Ma'adin mai cike da ma'adinai na ma'adinai mai cike da maki da tsayayyen jure da matsalar da aka kwatanta da maki mara rinjaye. Koyaya, ƙarfin tasirin zai iya rage kadan.
Flame-retardant pbt
Wuta-retardant Pbt yana da mahimmanci don aikace-aikace tare da bukatun aminci na wuta. Za'a iya amfani da abubuwan rarar wuta iri daban-daban, kowannensu da fa'idodin nasa da rashi.
Halogenated flame ringardts, kamar brominated mahadi, suna da tasiri amma na iya fuskantar damuwar muhalli. Wadanda ba aatarewa ba, kamar abubuwan da aka gabatar na Phosphorus, suna samun shahara.
Zaɓin wasan wuta ya shafi ba kawai aikin wuta ba har ma da sauran kaddarorin kamar ƙarfin na inji, juriya da zafi, da kuma rufin lantarki.
Tasiri-gyara pbt
Ana amfani da gyaran tasiri don inganta tauri da kuma zafin rai na PBT. Modifiers mafi yawan abubuwa na kowa shine elastomers, kamar:
Wadannan masu gyara suna samar da wani lokaci na daban a cikin matrix na PBT. Suna shan makamashi yayin tasirin, hana hana farawa da yaduwa.
Ana iya ƙara ƙarfin tasirin sakamako mai mahimmanci, musamman a ƙananan yanayin zafi. Koyaya, modulus da zafin jiki na iya zama dan kadan ya daidaita.
Sauran gyare-gyare
PBT na iya yin canje-canje daban-daban don biyan wasu buƙatun:
UV Tanters ana iya ƙara don inganta juriya ga hasken rana da yanayin yanayi.
Mutuntawa, kamar PTFE ko Silicone, ana iya haɗa su don rage gogewa da sutura.
Akwai PBT-Saural PBT don aikace-aikace tare da abinci da abubuwan sha.
Ana iya amfani da islomin unistatic don dissippate doka a aikace-aikacen lantarki.
Ana iya ƙara ƙwayoyin cuta da alamu don dalilai na yau da kullun.
Tebur da ke ƙasa yana taƙaita mahimman tasirin gyare-gyare game da abubuwan canji daban-daban game da kaddarorin PBT:
| ƙarfi | yana | Ingantaccen | da tasiri | mai | ƙarfin hali mai kyau |
| Zare na gilashi | ↑ | ↑ | ↓ | ↑ | ↑ |
| Ma'adinai ma'adinai | ↑ | ↑ | ↓ | ↑ | ↑ |
| Harshen Wuta | ↓ | ↓ | ↓ | ↓ | ↓ |
| Mai tasiri mai tsauri | ↓ | ↓ | ↑ | ↓ | ↓ |
Sarrafa dabarun sarrafa pbt
PBT abu ne mai zafin jiki wanda za'a iya sarrafa shi ta amfani da dabaru daban-daban. Bari mu bincika hanyoyin da suka fi dacewa da sigogin su.
na allurar
Hanyar allura ita ce hanyar da aka fi amfani da ita don aiki PBT. Abubuwan yana mai zafi zuwa narkewar jiki tsakanin 230 ° C da 270 ° C. Daga nan ya allura a cikin mold kiyaye a 40-80 ° C karkashin matsin lamba (yawanci 100-140 MPa ). Inganta sigogin sarrafawa -Such a matsayin narkewar jiki da allura-matsa lamba mafi kyau sashi kuma yana rage lahani kamar warping ko Alamar ruwa.
| Sigogi | rigakafi |
| Narke zazzabi | 230-270 ° C |
| Zazzabi na mold | 40-80 ° C |
| Shirya | 100-140 MPa |
Hawa
Wurin tasirin wani dabarar da ake amfani dashi don samar da samfuran Semi-da aka gama kamar zanen gado, sanduna, da bayanan martaba. A lokacin wucewa, PBT ya narke kuma an tilasta shi ta mutu, tare da narke zazzabi wanda aka sarrafa tsakanin 230 ° C da 250 ° C. Kula da madaidaiciyar sikelin madaidaiciya da kuma yawan sanyaya sanyaya yana da mahimmanci ga daidaito daidai.
| Equular | sifa mai kyau |
| Narke zazzabi | 230-250 ° C |
| Dunƙule gudun | Daidaitawa dangane da fitarwa |
Bude molding
Batare da aka yi amfani da shi ana amfani dashi don yin sassan m kamar kwalabe ko kwantena. A cikin wannan tsari, PBT ana fitar da shi cikin bututu, wanda ake kira Payeson, to, iska an busa iska a ciki don samar da siffar. Narke zazzabi da matsin iska taka suna taka muhimmiyar rawa wajen tabbatar da santsi mai santsi, kayan aiki.
| Aikace- | aikacen siga |
| Narke zazzabi | 230-250 ° C |
| Matsin iska | Ingantawa don sassan m |
Matsawa
Moldrin da matsawa ya shafi sanya PBT zuwa cikin mai zafi mold kuma dillali da shi a karkashin matsin lamba. Wannan hanyar ana amfani da ita don manyan sassan ko lokacin farin ciki . Abu ne da kyau don aikace-aikacen da ke buƙatar ƙarfafa abubuwa masu ƙarfi, waɗanda ke buƙatar riƙe sulhu.
Sigogin aiki na yau da kullun don pbt matsawa mai ƙarfi suna:
Narke zazzabi: 230 ° C zuwa 250 ° C
Zazzabi na mold: 150 ° C zuwa 180 ° C
Molding matsin lamba: 10 zuwa 50 MPa
3D buga tare da PBT
Duk da cewa karancin gama gari, ana iya sarrafa PBT ta amfani da dabarun buga 3D kamar ƙirar filaye na 3D (FFF) ko zaɓi na Laser na laser (sls). Ya dace da samar da rikice-rikice, sassan daɗaɗa da karfi. Inganta saiti na Buga kamar zafin jiki da kuma saurin bugawa yana tabbatar da santsi mai kyau da kuma m m.
| 3D buga bugun 3d | sakamako akan inganci |
| Fita zazzabi | Yana shafar haɗin gwiwa |
| Saurin bugawa | Yana sarrafa daidaito |
Aikace-aikace na PBT
PBT ta samo amfani da manyan masana'antu masu yawa saboda kyakkyawan kaddarorin. Bari mu bincika wasu wuraren aikace-aikacen.
Masana'antu
An yi amfani da PBT sosai a cikin masana'antar kera , juriya na zafi, da juriya na sinadarai. Yana da kyau a kan abubuwan da aka gyara kamar bumpers , na jikin mutum , bangarorin , da kuma baya . Misali, an saba samun PBT a cikin Window Mota Bugun , Gearboxes , da Radiat Windows , inda ya ba da kyakkyawan aiki a cikin mawuyacin yanayi.
| Aikace- | aikacen Aikace-aikacen PBT |
| Bumpers | Tasiri juriya da sassauci |
| Motar motoci | Rufin lantarki da karko |
| Abubuwan da aka watsa | Chememerrance juriya ga mai |
Kayan lantarki da kayan aikin lantarki
A bangaren lantarki , an daraja PBT saboda shingen wutar lantarki . Ana amfani dashi cikin masu sanyaya , magoya masu sanyaya , da masu canzawa , tabbatar da aminci da karko. Pbt kuma shahararren abu ne a cikin kayan lantarki da kayan aikin gida kamar kayan sanyaye da kuma injunan wanke kayan aiki, inda ya ba da ƙarfin lantarki da kwanciyar hankali. Amfani
| da lantarki | PBT USA |
| Mai haɗawa | Alamar lantarki |
| Magoya bayan Magana | Zafi juriya |
| Transformers da kuma sake fasalin | Haushi mai dorewa, gudanarwa mai zafi |
Kayan masarufi
A cikin kayayyakin mabukaci , an saba samun PBT a cikin kayan gida kamar kayan tsabtace gida da kuma masu yanke sassan kofi . Ƙarfinta da kwazo shi ma suna yin zaɓi na yau da kullun don kayan wasanni , gami da kankara skate da haɓakar kankara.
Kayan aikin likita
Likita na PBT da juriya sunadarai sun dace da na'urorin lafiya . Ana amfani da shi sau da yawa a cikin kayan , orthopedic , da kayan aikin likita waɗanda ke buƙatar madaidaici, mai dorewa, da kayan tsabta. Lowerarancin danshi yana tabbatar da dogaro na dogon lokaci a cikin yanayin likita.
| Na'urar likita | PBT rawar |
| Kayan aikin M | Karkatarwa da biocompativity |
| Orthopedic | Juriya na sinadarai da kwanciyar hankali |
Bututun ruwa da sauri
A cikin tsarin sarrafawa da tsarin sarrafawa da tsarin sarrafawa , ana amfani da PBT don kayan masarufi , ƙawancen , da kuma sterpeller . Juriya game da sunadarai, karfin danshi mai danshi, kuma babban tsautsayi ya sa ya zama cikakke don abubuwan da aka fallasa zuwa ruwa, mai, da masu tsabtace jami'ai.
| Bututun | mai amfani da pbt |
| Bawuloli da kayan aiki | Juriya na sinadarai |
| Serpellers | Karkatar da ruwa a ƙarƙashin bayyanuwar ruwa |
Kasuwancin masana'antu
PBT tana taka muhimmiyar rawa a cikin mashin masana'antu , inda ake amfani da ita wajen samar da abubuwan da ke ciki , gesa , na , da rollers . Waɗannan abubuwan haɗin suna amfana daga na PBT ƙananan ɓataccen abu , suna ɗaukar juriya , da kuma babban ƙarfin injiniya.
| na masana'antu | PBT |
| Ashe da gears | Saka juriya, low gogayya |
| Rollers da camps | Karkatar da daidaito da daidaito |
Kayan aikin sarrafa abinci
Ana amfani da PBT a aikace-aikacen abinci saboda bin ka'idodin ta FDA . Ana samun sau da yawa a cikin na belts , abubuwan amfani da abinci , da sauran kayan injunan da ke ɗaukar abinci. Juyin juriya na PBT na danshi da masu tsabtace jami'ai suna sa ya dace da kayan aikin hyggienic da aminci.
| Abubuwan sarrafa kayan abinci na abinci | PBT |
| Isar belts | Yarjejeniyar FDA, juriya na danshi |
| Abubuwan da ke ba da ruwan abinci | Karkatarwa da tsabta |
Fa'idodi da rashin amfanin PBT
Kamar kowane abu, PBT yana da ƙarfin ta da iyakokinta.
Yan fa'idohu
PBT tana ba da damar mahimman abubuwa da yawa a cikin masana'antu da yawa, yana ba shi sanannen sanannen aikace-aikacen aikace-aikacen aiki.
Kyakkyawan kayan aikin injin da kwanciyar hankali
Pbt suna yin girman girman ƙarfi , , da taurin kai , yana sa shi dawwama a ƙarƙashin damuwa na inji. Yana riƙe da kwanciyar hankali na girma , har ma a ƙarƙashin canza yanayin muhalli, wanda ke tabbatar da abubuwan haɗin gwiwa riƙe sifar su.
Babban sunadarai da sanya juriya
Pbt na tsayar da sunadarai da yawa, ciki har da masu samar , da mai , da mai . Ta sa juriya sanya ta dace da sassan motsi kamar gears, inda rage kwarin gwiwa yana da mahimmanci.
Kyakkyawan rufin wutar lantarki
na wannan polymer na ficewa a cikin rufin lantarki , tare da babban ikon yankeoki da ƙarancin abin hawa . Yana hana yaduwar kuzari kuma ana amfani dashi sosai a cikin lantarki da abubuwan lantarki.
Rashin tsayayyar danshi da UV juriya
tare da ƙarancin ƙwayar danshi na danshi , PBT yana kiyaye kaddarorin danshi a cikin yanayin laima. Ya kuma yi murmus radiation na UV , ya dace da amfani da waje ba tare da lalatewa ba a kan lokaci.
Rashin daidaito
Yayinda PBT tana da ƙarfi da yawa, hakan ma yana da wasu iyakoki waɗanda dole ne a yi la'akari.
Babbar shrinkage
pbt na nuna alamar shrinkage a yayin aiki, yana sa shi ƙalubalen kula da daidaitaccen daidaitawa a cikin hadaddun sassa. Bishiyoyi masu yanayin yanayin yanayin zama dole don rage shrinkage.
Sanarwar cutar hydrolysis
daya mai mahimmanci halartar dabi'ar PBT shine tunaninsa ga hydrolysis . Tsawan tsawan tsawan lokaci da ruwan zafi da ruwan zafi na iya lalata kayan a kan lokaci, iyakance amfanin sa a cikin yanayin fall-fallasa.
Yabo ga warping da ba su da ma'ana
saboda yawan shrinkage , CBT suna iya yashewa , musamman a cikin manyan sassan. Bugu da ƙari, wanda ba a amsa shi ba yana nuna ma'anar sanannen , yana sa ya fi saurin kamuwa da juriya-da aka danganta.
Lowerarancin zazzabi na zafi (HDT)
idan aka kwatanta da wasu filastik na injiniya, PBT yana da ƙananan HDT , ma'ana ba zai dace da aikace-aikacen yanayi mai zurfi ba tare da ƙarfafa ko maki na musamman.
| Abubuwan | da kebantawa Rashin daidaituwa |
| Kyakkyawan kaddarorin kayan aikin | Babban moldage |
| Babban tsari mai girma | SENIITITEVERVERY ga Hydrolysis |
| Kyakkyawan sinadaranta da sa juriya | Yuwuwar warping da ba su da hankali |
| Abin dogaro na lantarki | Lowerarancin yanayin zafin jiki mai zafi idan aka kwatanta da wasu |
| Low shawo kan danshi da UV juriya |
|
Ƙarshe
Polybutylene terephthater (PBT) ya fito fili don karfinsa na , kayan masarufi , da kwanciyar hankali . Abubuwan da ta wuce sa suna da mahimmanci a kan masana'antu kamar kayan aiki, lantarki, da na'urorin likita. Fahimtar PBT ta PBT, dabarun sarrafawa, da aikace-aikace suna da mahimmanci don zaɓar kayan da ya dace kuma tabbatar da ƙirar samfurin da dama.
Tukwici: Kai mai son sha'awar dukkanin robobi
