Polybutlene Terephthalate (PBT) iri hose, kuva mumodoka yawe kugeza kuri ecturebics. Ariko mubyukuri ni iki? Iyi kimwe cya kabiri cyubwubatsi bwubuhanga ni mumuryango wa polyester kandi atanga impirimbanyi nimbaraga.
Muri iyi nyandiko, tuzasesengura ibitera pbt idasanzwe, imitungo yayo, gutunganya uburyo, nuburyo ikoreshwa mu nganda nka automotike na electronics.
Ni ubuhe butumwa Polybute Terephthalate (PBT)?
Polybutylene Terephthalate (PBT) ni igice cya sithoplastike mumuryango wa polyester. Birazwi ku mbaraga, guhinduka, no kurwanya imiti. Kubera iyo mitungo, pbt ikoreshwa cyane mumodoka, electoroniki, hamwe ninganda.
Imiti n'imiterere ya pbt
Imiterere ya chimique ya pbt ihagarariwe na formula (c12h12o4) n. Polymer igizwe n'iminyururu myinshi yakozwe binyuze muri ERTER. Izi nkunga zitanga ibikoresho hamwe no kuramba no kurwanya ubushyuhe, bituma biba byiza kubidukikije. Imiterere ya kimwe cya kabiri gitanga umutekano, bivuze ko igumana imiterere yacyo nubwo yashimangiye.
Imiterere ya MoleCure ya Polybutel terephthalate
Ibigize by'ingenzi birimo:
1,4-Butanediol (BDO) : yongeyeho guhinduka no gufasha mubuvuzi.
Acide Terephthalic (TPA) cyangwa Dimethyl Terephthalate (DMT) : itanga ubunyangamugayo nubunyangamugayo.
Synthesis ya PBT
Umusaruro wa PBT urimo reaction ya polyconden hagati ya Dimethyl Terephthalate (DMT) cyangwa Acide Terephthalic (TPA) na 1,4-Butanediol (BDO).
Ibikoresho fatizo:
Synthesis itangirana na reaction yo gukomera, aho bdo yibasiwe na DMT cyangwa TPA. Iyo ukoresheje DMT, methanol ikozwe nkibicuruzwa. Hamwe na TPA, amazi arasohoka. Igisubizo gikurikira gikuraho bdo, biganisha ku minyururu miremire ya polymer binyuze mu myitwarire myiza.
Ibigereranyo bya chimique:
DMT reaction:
TPA reaction:
Ibi bitekerezo bibaho mubushyuhe bwinshi, mubisanzwe hagati ya 230 ° C na 250 ° C , no munsi yimiterere yicyuho. Imyanya irashobora kandi gukoreshwa mu kwihutisha reaction no guharanira uburemere bukomeye bwa molekale.
| bwibicuruzwa | By-ibicuruzwa | Ubwoko |
| DMT hamwe na bdo | Methanol | 230-250 ° C, vacuum |
| Tpa hamwe na bdo | Amazi | 230-250 ° C, vacuum |
Iyi nzira yo muri polycondensdens ni urufunguzo rwo gukora iminyururu iramba, irwanya ubushyuhe irwanya pbt.
Pbt nkumunyamuryango wumuryango wa polyester
Nka polyester, pbt imigabane isa nabandi polyester nka Polyethylene Terephthalate (Pet) . Ariko, iratandukana binyuze mu kigero cyacyo cyihuse no gutunganya ubushyuhe bwo gutunganya. Ibi bituma bibumbabumbwa muburyo bukomeye. Ugereranije nabandi polyesters, PBT ifite imitungo isumbuye hamwe nubuvuzi buhebuje, bituma bitunganya ibice byerekanwe kumavuta, ibicanwa, nubushyuhe bwo hejuru.
Imitungo ya pbt
PBT yerekana guhuza bidasanzwe kumitungo ituma ikwiranye na porogaramu zitandukanye. Reka dusuzume neza ibintu byingenzi.
| Ubwoko | bw'umutungo | |
| Umutungo | Ubucucike | 1.31 G / CM⊃3; |
| Kugabanya urutonde rwa ogisijeni | 25% |
| Ubushuhe (amasaha 24) | 0.08% -0.1% |
| Umutekano | Byiza |
| UV Kurwanya UV | Byiza |
| Imiterere ya mashini | Imbaraga za Tensile | 40-50 mpa |
| Modulus | 2-4 GPA |
| Kurangiza | 5-300% |
| Kurwanya Creep | Hejuru ku bushyuhe bwo hejuru |
| Imiterere yubushyuhe | Ubushyuhe bwo guhindura ubushyuhe (HDT) | 115-150 ° C (kuri 0.46 MPA); 50-85 ° C (kuri 1.8 MPA) |
| Ubushyuhe bwa serivisi | 80-140 ° C. |
| Kurwanya umuriro | Kuboneka mu manota arwanya flame-irwanya |
| Coefficient yo Kwagura Ubushyuhe | 6-10 x 10⁻⁵ / ° ° C. |
| Umutungo w'amashanyarazi | Imbaraga zimyidagaduro | 15-30 kv / mm |
| Imyitozo isanzwe @ 1 khz | 2.9-4 |
| Uburebure | 14-17 x 10⊃1; ⁵ ohm.cm |
| Kurwanya imiti | Kurwanya imiti | Kurwanya gukomeye gucika bugufi, alcool, hydrocarbone, ibicuruzwa, amavuta |
| UV no kurwanya Stain | Hejuru |
| Kurwanya Ibicuruzwa bya Organic, amavuta | Byiza |
Umutungo
PBT itanga ibipimo byiza cyane, ndetse no muburyo butandukanye bwibidukikije. Ifite ubuhehere buke, mubisanzwe hafi 0.1% nyuma yamasaha 24 yo kwibizwa.
Ubu buryo buhebuje buke bugira uruhare mu kuramba kwayo ku mutima imihangayiko n'ibidukikije bikaze bya chimique. PBT irashobora kubungabunga imiterere n'imikorere mugusaba ibihe.
Imiterere ya mashini
PBT yirata imbaraga nyinshi, gukomera, no gukomera. Hano hari ibimenyetso bifatika:
| k'umutungo | agaciro |
| Imbaraga za Tensile | 50-60 mpa |
| Modulus | 2.3-2.8 GPA |
| Kurangiza | 50-300% |
PBT kandi igaragaza imbaraga nziza zingirakamaro. Irashobora kwihanganira imitwaro itunguranye idacika cyangwa kumena.
Ikindi kintu cyingenzi ni ukurwanya ibyayo. PBT irashobora kubungabunga imiterere yabyo munsi yo guhorana imihangayiko, ndetse no ku bushyuhe bwo hejuru.
Imiterere yubushyuhe
PBT ifite ubushyuhe bwinshi bwo guhinduranya ubushyuhe (HDT) ugereranije nibindi byinshi byubumitsi. Kurugero, kuri 1.8 MPA Umutwaro, HDT yayo ifite 60 ° C, mugihe PolyproPylene's ifite 50 ° gusa.
Ifite kandi ubushyuhe bwo hejuru, byerekana ubushobozi bwayo bwo kugumana imitungo ku bushyuhe bwo hejuru. PBT irashobora kwihanganira urujya n'uruza rw'igihe gito n'ubushyuhe burebure buturuka ku kwangirika cyane.
Umutungo w'amashanyarazi
PBT itanga amashanyarazi menshi nimbaraga zubuzima. Iyi mitungo ituma ari byiza kwikuramo ibice byamashanyarazi.
Irinda gusohora, kumeneka, no gusenyuka mumizunguruko. Igihombo gito cya PBT nacyo kigira kimwe kuri porogaramu ndende ya elegitoronike.
Kurwanya imiti
PBT yerekana kurwanya imiti itandukanye, harimo:
Acide
Inzoga
Hydrocarbone
Impumuro nziza
Amavuta n'amavuta
Iyi mbuto irwanya imiti ituma pbt ibereye ibice byerekanwe nibibinyabuzima, lisansi, namavuta. Irashobora kugumana ubunyangamugayo bwayo mubidukikije bikaze.
PBT itanga kandi ikananga ryiza uv, ibuza gutesha agaciro urumuri rwizuba. Imyigaragambyo ya Stain yongerera iherezo iramba no kurohama.
Ubwoko no Guhindura PBT
Amanota ya PBT adafite akamaro
Amanota ya PBT yubuntu nuburyo bwibanze bwibikoresho nta nguzanyo. Batanga impirimbanyi yumutungo ubereye kubisabwa byinshi.
Izi nshuro ziza mu rugero rwo gushonga, gutanga gutunganya ibintu byo gutunganya no gutera inshinge.
Ibirahuri fibre bishimangirwa pbt
Ibirahuri fibre bishimangirwa pbt ni uguhindura. Hiyongereyeho ibirahure byongera cyane imitungo ya mashini yibikoresho.
Imbaraga za Tensile, modulul ya flaxigh, hamwe n'imbaraga zo guterana birashobora kwiyongera inshuro 2 kugeza kuri 3 ugereranije nicyiciro cyuzuye. Ibi bituma ibirahuri bishimangira pbt byiza kubisabwa.
Ibirimo fibre birashobora gutandukana, mubisanzwe kuva kuri 10% kugeza 50%. Ibirimo fibre nyinshi bivamo imbaraga no gukomera ariko bigabanijwe.
Mbuyebunce yuzuye
Amabuye y'agaciro, nka Talc na Calcium Carbonate, irashobora kongerwaho PBT. Aba bazunguzi batezimbere umutekano uhagaze no kugabanya kugabanuka mugihe babumba.
Amabuye y'agaciro ya MBT aratanga umusaruro mwinshi nubushyuhe ugereranije nicyiciro cyuzuye. Ariko, imbaraga zigira ingaruka zishobora kugabanuka gato.
Flame-Redardant PBT
Flame-Redardant PBT ningirakamaro kubisabwa nibisabwa umutekano wumuriro. Ntibishobora gukoreshwa mu buryo butandukanye bw'inkombe birashobora gukoreshwa, buri kimwe hamwe ninyungu zayo hamwe nibibi.
Hapieten Degdants, nkibintu bya Brorinated, bifite akamaro ariko birashobora guhura nibidukikije. Ubundi buryo butari Halogeten, Nka kongerwamo-fosifore, ni ukunguka ibyamamare.
Guhitamo umuriro wa flame bigira ingaruka kubikorwa byumuriro gusa ahubwo nibindi bintu nkimbaraga zubukanishi, kurwanya ubushyuhe, n'amashanyarazi.
Ingaruka PBT
Guhindura ingaruka bikoreshwa mugutezimbere ubumuga no kwibigurira pbt. Guhindura ingaruka bisanzwe ni Elastomers, nka:
Aba bahinduranya bagize icyiciro cya rubbery muri matrix. Bakurura imbaraga mugihe cyingaruka, kubuza gutangizwa no kwamamaza.
Imbaraga zingaruka zirashobora kwiyongera cyane, cyane cyane mubushyuhe buke. Ariko, modulus no kurwanya ubushyuhe birashobora guhungabana gato.
Ibindi byahinduwe
PBT irashobora guhindura ubundi buryo butandukanye kugirango yubahirize ibisabwa byihariye:
UV Stabilizers irashobora kongerwaho kugirango itezimbere izuba nikirere.
Ibihimbaro, nka PTFE cyangwa Silicone, birashobora kwinjizwa kugirango ugabanye guterana no kwambara.
Icyiciro-Icyiciro PBT kirahari kubisabwa muguhuza nibiryo n'ibinyobwa.
Abakozi ba Antistake barashobora gukoreshwa mugutandukanya amafaranga ateganijwe muri porogaramu za elegitoroniki.
Amabara na pigment arashobora kongerwaho intego nziza.
Imbonerahamwe ikurikiramo kuvuga muri make ingaruka zingenzi zifatika kuri PBT Umutungo:
| Gukomera | imbaraga | bigira | ingaruka ku | kurwanya ubushyuhe bushingiye | ku rwego rwo kurwanya ubushyuhe buke |
| Fibre | ↑ | ↑ | ↓ | ↑ | ↑ |
| Ubuntu | ↑ | ↑ | ↓ | ↑ | ↑ |
| Flame redibant | ↓ | ↓ | ↓ | ↓ | ↓ |
| Guhindura Ingaruka | ↓ | ↓ | ↑ | ↓ | ↓ |
Tekinike yo gutunganya PBT
Pbt ni ibikoresho byonyine bishobora gutunganywa ukoresheje tekiniki zitandukanye. Reka dusuzume uburyo bukunze kugaragara hamwe nibipimo byingenzi.
Gutera inshinge
Gutera inshinge nuburyo bukunze gukoreshwa mugutunganya PBT. Ibikoresho bishyuha ku bushyuhe bwashonga hagati ya 230 ° C na 270 ° C. Nyuma iterwa muri mold ikomeje kuri 40-80 ° C munsi yumuvuduko mwinshi (mubisanzwe 100-140 mpa ). Kunoza ibipimo byo gutunganya - nkuko byashojije ubushyuhe no gutera inshinge -Bicyiciro cyiza igice cyiza kandi kigabanya inenge nka Kurwana cyangwa kurohama.
| Ibishushanyo | Byiza |
| Gushonga | 230-270 ° C. |
| Ubushyuhe bwa mold | 40-80 ° C. |
| IHURIRO | 100-140 MPA |
Kuzamuka
Kwiyongera nubundi buryo bwakoreshejwe cyane bwo gukora ibikomoka kuri kimwe cya kabiri nkimpapuro, inkoni, hamwe numwiyumirwa. Mugihe cbt, pbt irashonga kandi igahatirwa kugwa, hamwe nubushyuhe bwashonze hagati ya 230 ° C na 250 ° C. Kubungabunga umuvuduko wiburyo no gukonjesha ni ngombwa kugirango ugereranye neza.
| Ibipimo bya Extrusion | bifite agaciro keza |
| Gushonga | 230-250 ° C. |
| Umuvuduko | Yahinduwe ukurikije ibisohoka |
Guhubuka
Gukuramo ubumuga bikoreshwa mugukora ibice byumunwa nkamacupa cyangwa ibikoresho. Muri iki gikorwa, PBT irasigaranye umuyoboro, yitwa Parison, noneho ikirere kimaze gukubitwa kugirango kibe imiterere. Gushonga ubushyuhe hamwe nigitutu cyikirere kirimo uruhare rwingenzi mugushimangira ibicuruzwa byoroshye, rimwe.
| Porogaramu | |
| Gushonga | 230-250 ° C. |
| Umuvuduko wo mu kirere | Byanze bikunze ibice |
Gukuramo
Kwirukana kwikuramo bikubiyemo gushyira Pbt muburyo buke kandi bukantera igitutu. Ubu buryo bukoreshwa mubice binini cyangwa binini . Nibyiza kubisabwa bisaba ibice bikomeye, birambye bikeneye gusuzugura neza.
Ibipimo bisanzwe byo gutunganya kubicuruzwa bya PBT BIT:
Gushonga ubushyuhe: 230 ° C kugeza 250 ° C.
Ubushyuhe bwa Mold: 150 ° C kugeza 180 ° C.
Kubumba igitutu: 10 kugeza 50 MPA
3d icapiro hamwe na PBT
Nubwo bidasanzwe, PBT irashobora gutunganywa hakoreshejwe tekiniki ya 3D nka filament filament (FFF) cyangwa guhitamo laser centerning (sls). Birakwiriye kubyara ibice bigoye, kuramba hamwe nimbaraga nyinshi. Guhitamo Igenamiterere nkubushyuhe bukabije no gucapa byerekana ko byoroshye.
| 3D gucapa ibimenyetso | byerekana ku bwiza |
| Ubushyuhe bukabije | Bigira uruhare mu guhuza |
| Icapa | Kugenzura neza |
Gusaba PBT
PBT isanga ikoreshwa muburyo butandukanye bwinganda bitewe numutungo mwiza. Reka dusuzume bimwe mubice byingenzi byakoreshwa.
Inganda zimodoka
PBT ikoreshwa cyane mu nganda zimodoka kubera kuramba, kurwanya ubushyuhe, no kurwanya imiti. Nibyiza kubigize nkibikoresho moteri , byumubiri byumubiri bya , nibice , byohereza . Kurugero, PBT isanzwe iboneka mu idirishya rya moteri ya Window , Gearbox , na Radiator Windows , aho itanga imikorere myiza mubidukikije bikaze.
| Igice cyimodoka | pbt gusaba |
| Bumpers | Kurwanya ingaruka no guhinduka |
| Ibice bya moteri | Amashanyarazi no kuramba |
| Ibice byohereza | Kurwanya imiti |
Ibikoresho bya elegitoroniki n'amashanyarazi
Mu rwego rwa elegitoroniki , PBT ihabwa agaciro kumitungo yayo y'amashanyarazi . Ikoreshwa mubihuza , abafana bakonje , kandi ihindura , kugirango umutekano nimbane. PBT nayo nibikoresho bizwi mumashanyarazi ya elegitori hamwe nibikoresho byo murugo nka firigo hamwe nimashini zimesa, aho bitanga imbaraga zamashanyarazi numutekano.
| Ibice bya elegitoronike | PBT ikoreshwa |
| Guhuza | Inshinge z'amashanyarazi |
| Abafana bakonje | Kurwanya ubushyuhe |
| Guhindura no gutangaza | Amazu araramba, Gucunga Ubushyuhe |
Ibicuruzwa byabaguzi
Mubicuruzwa byabaguzi , PBT isanzwe iboneka mubintu byo murugo nkibikoresho byo gusukura vacuum hamwe nibice byabakora ikawa . Imbaraga zayo no kuramba nabyo bikahitamo neza kubicuruzwa bya siporo , harimo na Skate Skate na Imbaraga zo Gutobora.
Ibikoresho byo kwa muganga
Ibinyabuzima bya PBT hamwe no kurwanya imiti bituma bikwiranye nibikoresho byubuvuzi . Bikunze gukoreshwa mubikoresho byo kubaga , amagufwa , nibikoresho byubuvuzi bisaba neza, biramba, nibikoresho byisuku. Kwinjira mu buryo buke butuma kwibazwa igihe kirekire mu bidukikije.
| Igikoresho cyubuvuzi | pbt Uruhare |
| Ibikoresho byo kubaga | Kuramba na BiocompaTatis |
| Imbaraga za orthopedic | Kurwanya imiti no gutuza |
Amazi n'amazi
Muburyo bworoshye kandi butarimo amazi , PBT ikoreshwa muguhindura , , indangagaciro na pompe . Kurwanya imiti, kwinjiza mu buryo buke, kandi iramba ryinshi rituma bituma bigize ibice byerekanwe n'amazi, amavuta, no gusukura.
| Ibigize Amashanyarazi | PBT Imikoreshereze |
| Indangagaciro na fittings | Kurwanya imiti |
| PUP Impellers | Kuramba munsi yamazi |
Inganda Imashini
PBT igira uruhare runini muri mashini zinganda , aho ikoreshwa mu byububiko , ibikoresho , numuzingo , . Ibi bice byungukirwa no gukora kwa PBT kwambara , guterana , nimbaraga nyinshi.
| Inganda Igice cya | Pbt Porogaramu |
| Kwikorera n'ibikoresho | Kwambara kurwanya, guterana amagambo make |
| Umuzingo n'ikambi | Kuramba no gusobanuka |
Ibikoresho byo gutunganya ibiryo
PBT ikoreshwa mubisabwa byibiryo kubera kubahiriza amabwiriza ya FDA . Bikunze kuboneka muri convelaor , umukandara utunganya ibiryo , nizindi mashini ikora ibiryo. Kuba PBT kurwanya ubushuhe no gusukura bituma bituma bigira neza kubikoresho biringaniwe kandi byizewe. Ibigize Ibikoresho
| byo gutunganya ibiryo | PBT |
| Umukandara | Kubahiriza FDA, kurwanya ubuhehere |
| Ibiryo byo gutunganya ibiryo | Kuramba n'isuku |
Ibyiza nibibi bya PBT
Kimwe nibintu byose, pbt ifite imbaraga nimipaka.
Ibyiza
PBT itanga ibyiza byinshi mubijyanye n'inganda nyinshi, bituma hamenyekane izwi cyane yo gusaba byinshi.
Ibyiza bya imashini ya disikorali hamwe nubukungu bwihariye
PBT yirata nyinshi , imbaraga , kandi ikomeye , bigatuma biramba ku mihangayiko. Ikomeza umutekano uhoraho , ndetse no muburyo butandukanye bwibidukikije, bigize ingaruka zigumana imiterere yabo.
Imiti miremire kandi yambara irwanya
PBT irwanya imiti itandukanye, harimo na LEVENTS , SHAKA , namavuta . Kwambara kwa kwambara bituma bikwiranye nibice byimuka nkibikoresho, aho kugabanuka gukabije ni ngombwa.
Amashanyarazi meza kumashanyarazi
aruta mumashanyarazi , hamwe nimbaraga nyinshi zuzuye nubushake buke . Irinda imikoreshereze ingufu kandi ikoreshwa cyane muri elegitoroniki n'amashanyarazi.
PBT ikwirakwira cyane kandi uv irwanya uv
hamwe no kwinjizwa mu buryo buke , PBT ikomeza imitungo yayo mu bidukikije bitoroshye. Irimo kandi imirasire ya UV , ituma ikorwa kugirango ikoreshwe hanze itangirika mugihe runaka.
Ibibi
Mugihe PBT ifite imbaraga nyinshi, ifite kandi imbogamizi igomba gusuzumwa.
Hafi ya mold parkunka
pbt yerekana imiterere minini mugihe cyo gutunganya, bigatuma bigoye gukomeza ubumwe mu bice bigoye. Ubuhanga bwabutse burakenewe kugirango bugabanye kugabanuka.
Kwiyumvisha kuri hydrolysis
imwe yibikorwa byingenzi bya PBT nigitekerezo cyayo kuri hydrolysis . Kubyara igihe kirekire namazi hamwe ashyushye arashobora gutesha agaciro ibikoresho mugihe runaka, bikagabanya imikoreshereze yacyo ahantu hashyizwe mumazi.
Ikunda kurwana no kuvugisha sensitivite
kubera aganshi mu gaciro , PBT ikunda kurwana , cyane cyane mu bice binini cyangwa bikomeye. Byongeye kandi, ibikubiyemo byatanzwe byerekana notch sennititivite , bigatuma byoroshye kuvuka bifitanye isano.
Ubushyuhe bwo hasi bwubushyuhe (HDT)
ugereranije nizindi plastiki yubuhanga, pbt ifite HDT yo hepfo , bivuze ko ishobora kuba idakwiriye gusaba ubushyuhe bwo hejuru idashimangiye cyangwa amanota yihariye.
| Ibyiza | Ibibi |
| Ibiranga byiza | Imyanda rusange |
| Umutekano mwinshi | Kwiyumvisha hydrolysis |
| Imiti myiza no kwambara | Bakunda kurwana no kuvuza sensitivite |
| Inyigisho z'amashanyarazi | Ubushyuhe bwo hasi bwubushyuhe ugereranije nabandi |
| Kwinjiza mu buryo buke na UV Kurwanya UV |
|
Umwanzuro
Polybutylene Terephthalate (PBT) igaragara kubwimbaraga zamanika , zo kurwanya imiti , kandi ituje ryinshi . Kugereranya kwayo bituma ari ngombwa munganda nkimodoka, ibikoresho bya elegitoroniki, nibikoresho byubuvuzi. Gusobanukirwa imitungo ya PBT, tekinike yo gutunganya, na porogaramu ni ngombwa kugirango uhitemo ibintu byiza kandi ugashimangira igishushanyo mbonera.
INAMA: Birashoboka ko ushobora kuba ushishikajwe na plastique yose
