I-TPU plastic material, ngokwesayensi eyaziwa ngokuthi i-thermoplastic polyurethane, ingenye yamapholima wobunjiniyela aguquguqukayo kakhulu atholakala kubakhiqizi namuhla. Le material ephawulekayo ibhidliza igebe phakathi kwe-rubber ne-plastic, inikeza ukunwebeka kwe-rubber kuyilapho igcina ukucutshungulwa namandla e-thermoplastic. Ngenxa yalokho, ama-TPU granules angancibilikiswa, abunjwe, futhi ancibilikiswe kabusha kaningi ngaphandle kokuncipha okukhulu kwezakhiwo zawo eziyisisekelo zomshini, okwenza kube ukukhetha okuhambisana nemvelo nokonga ezomnotho ezinhlelweni eziningi zezimboni. Abakhiqizi emhlabeni wonke bathembela kuma-TPU pellets ekufakeni nge-injection molding, extrusion, kanye ne-blow molding processes, futhi isidingo siya sikhula njengoba izimboni zifuna izixazululo zamapholima aqinile kodwa aguquguqukayo. Okuhlukanisa ngempela i-thermoplastic polyurethane yikhono layo lokulungiselelwa ngokuqondile amazinga obulukhuni, imibala, nezici zokusebenza, yingakho izinkampani ezifana ne-Dongguan Mier Plastic Material Co., Ltd. zakhe idumela lazo ekulethweni kwama-TPU formulations enziwe ngobunjiniyela obunembile. Ukuqonda ubunjalo obuyisisekelo baleli polymer eliguquguqukayo yisinyathelo sokuqala sokubonga ukuthi kungani ibusa izigaba eziningi zemikhiqizo ekukhiqizeni kwesimanje.

Izici ezibalulekile zempahla ye-TPU plastic yizo eziyenza ibaluleke kakhulu emikhakheni eminingi, futhi lezi zici zifuna ukunakwa ngokucophelela yinoma yimuphi uchwepheshe wokuthenga. Okokuqala nje, i-thermoplastic polyurethane inikeza ukuguquguquka okukhethekile kuhlangene namandla amahle kakhulu okudabula, okusho ukuthi izingxenye zingagoba, zelule, futhi zibuyele esimweni sazo ngaphandle kokuqhekeka noma ukulahlekelwa ukwakheka kwazo ngokuhamba kwesikhathi. Ukumelana nokugqokwa kungenye into evelele, njengoba ama-TPU granules enza kangcono kunezinye izinto eziningi ezinwebekayo ngisho nensimbi eziningi ekuhlolweni kokugqoka, yingakho le mpahla iyona ekhethwayo ezingxenyeni ezibhekana nokungqubuzana nokuthintana njalo. Amandla okudonsa nawo ayamangalisa, evumela ama-TPU pellets ukuthi amelane namandla amakhulu okudonsa nokwelula okungaphazamisa unomphela amapulasitiki ajwayelekile noma amarubha. Ngaphezu kwalokho, i-thermoplastic polyurethane ibonisa ukumelana okuhle kakhulu namafutha, amafutha okugcoba, kanye nohlu olubanzi lwamakhemikhali, okwenza ifanelekele izindawo ezinzima lapho ukuchayeka kuphethiloli, okokugcoba, nama-solvents kuyinto evamile. Lezi zici ezihlanganisiwe—ukuguquguquka, ukuqina, amandla, nokumelana namakhemikhali—kwenza impahla ye-TPU plastic ibe yindlela engcono kakhulu kunezinto eziningi zendabuko zerubha, futhi zichaza ukuthi kungani onjiniyela behlala beyicacisa ngezinhlelo zokusebenza ezisebenza kahle kakhulu. Ukuzinza kwemvelo kwe-UV nokusebenza kahle ekushiseni okuphansi kwe-thermoplastic polyurethane kuqhubeka kukhulisa ukusetshenziswa kwayo ezinhlelweni zangaphandle nezasebusika, kwengeza kulokho osekuyimpumelelo yobunjiniyela.

Ithebula lokusetshenziswa le-TPU plastic material libanzi ngendlela emangalisayo, futhi ukuqonda lapho le thermoplastic polyurethane ikhula khona kungasiza abakhiqizi ukuthi babone amathuba amasha okusungula nokuthuthukisa. Emkhakheni wezimoto, i-thermoplastic polyurethane isetshenziswa kakhulu ezingxenyeni zangaphakathi zokuhlobisa, amakhava e-airbag, izibambo zamasondo okulawula, namafilimu okuvikela, kanti ngaphansi kwe-hood, ama-TPU granules atholakala emapayipini, ama-seals, nama-gaskets okumelwe amelane nokushisa, amafutha, nengcindezi yemishini. Umkhakha wezicathulo mhlawumbe ungumsebenzisi obonakala kakhulu wama-TPU pellets, njengoba izintende zezicathulo zokusubatha, izithende, nama-midsoles zincike ekubuyiselweni okuhle kwezinto, ukuthambisa, nokumelana nokugqoka ukuze kulethwe ukusebenza nokuphila isikhathi eside ezigidini zabagijimi nabahambayo nsuku zonke. Izintambo nezintambo zimelela enye indawo enkulu yokusetshenziswa, lapho i-TPU plastic material isebenza njengongqimba oluvikelayo oluvikela ama-conductor ekugqokweni, umswakama, nokuhlaselwa amakhemikhali ezindaweni zezimboni, zezimoto, nezasolwandle. Amahose namashubhu enziwe nge-thermoplastic polyurethane anikeza ukuguquguquka okukhethekile nokumelana nokugoba, okwenza afaneleke kahle kumasistimu e-pneumatic, imigqa ye-hydraulic, nokusetshenziswa kokudlulisa uketshezi lapho ukuthembeka kungukuthi akuxoxiswana ngakho. Izingxenye zezimboni ezifana namagiya, amarola, amasondo, namabhande okuthutha nazo zizuzisa kakhulu ekuhlanganisweni okukhethekile kokuqina nokunwebeka, okunciphisa isikhathi sokuphumula nezindleko zokulungisa emisebenzini enzima.

Ngaphezu kwalezi zindawo zendabuko, impahla ye-TPU plastic yenze inqubekelaphambili enkulu emishinini yezokwelapha, izinto zemidlalo, kanye ne-electronics yabathengi, lapho ukuhambisana kwayo nempilo kanye nezimfanelo zokusebenza kuthakaselwa kakhulu. Izicelo zezokwelapha ze-thermoplastic polyurethane zihlanganisa ama-catheter, amashubhu okumpontshela, amafasitela amanxeba, kanye namafilimu okuvikela, konke lokhu okudinga izinto eziphephile ukuthintana nomuntu, ezilula ukuzihlanza, futhi ezikwazi ukugcina ubuqotho besakhiwo ngaphansi kokusetshenziswa okuphindaphindiwe. Abakhiqizi bezimpahla zemidlalo bathembela kuma-TPU granules ezintweni ezikhuphukayo, amaphedi okuvikela, izibambo, kanye namabhande ewashi le-GPS, bezuza emandleni empahla yokumunca umthelela nokugcina isimo sayo ngisho nangemva komsebenzi womzimba onzima. Ku-electronics yabathengi, ama-TPU pellets asetshenziselwa ukukhiqiza amakesi ocingo, amabhande ewashi elihlakaniphile, izintambo zama-headphone, kanye nama-bumper okuvikela, lapho ukuthinta okuthambile kwempahla, ukumunca ukushaqeka, kanye nokuzinza kombala kuyizinto ezibalulekile zokuthengisa kubathengi abaqaphelayo. Ukuguquguquka kwempahla ye-TPU plastic kufinyelela ngisho nasembonini yokupakisha, lapho amafilimu acwebezelayo namasaka enziwe nge-thermoplastic polyurethane ehlinzeka ngezindawo eziqinile, eziguquguqukayo, neziphrintwayo zezicelo zokupakisha ezivikelayo. I-Dongguan Mier yohlu olubanzi lwemikhiqizo ye-TPU isekela zonke lezi zicelo nokunye okuningi, futhi amakhasimende angahlola uhlu olugcwele lwezixazululo zenkampani ku-Imikhiqizo ikhasi ukuze bathole izinga eliqondile lezidingo zabo ezithile. Abakhiqizi emkhakheni wezemidlalo nokungcebeleka, ngokwesibonelo, bangathola amafomula akhethekile ku-Izixazululo zezemidlalo nokungcebeleka ikhasi, kanti izinkampani ezisebenza ngemishini yezokwelapha zingabuyekeza i-Izixazululo zempahla yezokwelapha ikhasi lezinketho zempahla ezihambisana nomthetho neziphephile.

I-Dongguan Mier Plastic Material Co., Ltd. iyaziqhenya ngokunikeza olunye lohlu oluphelele kakhulu lwemikhiqizo ye-TPU embonini, eklanyelwe ukuhlangabezana nezidingo ezahlukahlukene zokukhiqiza kwanamuhla ngokunemba nokungaguquguquki. Iphothifoliyo yethu ye-thermoplastic polyurethane ihlanganisa wonke amazinga obulukhuni, kusukela kumafomula athambile naguquguqukayo ebangeni le-Shore A kuya ezingeni eliqinile neliqinile ebangeni le-Shore D, okuvumela amakhasimende ukuthi akhethe i-durometer enembile ehambisana nezidingo zawo zokusebenzisa. Noma ngabe iklayenti lidinga into ethambile emayelana ne-70 Shore A yokubamba okuthambile noma i-polymer yobunjiniyela eqinile eduze kwe-75 Shore D yezingxenye zesakhiwo, ama-granules ethu e-TPU aletha ukusebenza okubikezelwe nokuphindaphindekayo kuwo wonke amazinga. Lobu banzi bezinketho zobulukhuni bubalulekile ngoba bunika onjiniyela bokuqamba ithuba lokuthuthukisa imikhiqizo yabo ukuze ihlangabezane nezidingo ezithile zemishini ngaphandle kokuyekethisa kwezinye izakhiwo ezibalulekile njengokumelana namakhemikhali noma ukumelana nokugqokwa. Ngaphezu kwalokho, amaphilisi ethu e-TPU akhiqizwa ngobuchwepheshe obuthuthukile bokuhlanganisa obuqinisekisa ukusabalalisa okufanayo kwezithasiselo nokuziphatha kokugeleza okungaguquki kokucubungula okuthembekile emishinini yokujova nokukhipha. Ukutholakala kwezinhlobo ezimbili ze-aromatic ne-aliphatic thermoplastic polyurethane kunikeza amakhasimende ukuguquguquka okwengeziwe, njengoba amazinga e-aliphatic enikeza ukubonakala okuthuthukisiwe nokuzinza kwe-UV ezinhlelweni ezibucayi zombala nangaphandle.

Ngaphezu kokuqina nokuvumelana nezimo, uhlu lwethu lwemikhiqizo ye-TPU luhlanganisa izinhlobonhlobo eziningi ezisobala nezinemibala ezinika amabhrendi ithuba lokufeza izinhloso zawo zobuhle nokusebenza ngokunembile. Izinga le-TPU elisobala libaluleke kakhulu ezinhlelweni ezinjengamafilimu okuvikela, amakesi omakhalekhukhwini, amabhande ewashi, namashubhu ezokwelapha, lapho ukucaca kokubona nekhwalithi yobuso kubaluleke njengokuqina kwemishini. Kumakhasimende afuna imibala ethile yomkhiqizo noma imiphumela ebonakalayo, sinikeza izinsizakalo zokufanisa imibala ngokwezifiso ezikhiqiza izinhlayiya ze-TPU cishe kunoma yimuphi umbala, okuhlanganisa imibala yensimbi, eyobuhlalu, neyokhanyisa ekhanyayo ethuthukisa umehluko womkhiqizo ezimakethe ezinokuncintisana. Ngale kobuhle, amandla ethu okwenza izinhlanganisela ngokwezifiso anweba ekufakeni izithasiselo ezithuthukisa ukusebenza njengezinto ezivimbela umlilo, izinzisi ze-UV, ama-anti-bacterial agents, nezinsiza zokucubungula, konke okungafakwa ku-thermoplastic polyurethane matrix ukuze kuhlangatshezwane nezidingo eziqinile zemboni. Ithimba lethu elinamava le-R&D lisebenza eduze namakhasimende ukuthuthukisa izixazululo ze-TPU plastic material ezenziwe ngokwezifiso ezibhekana nezinselele eziyingqayizivele zokusebenza, noma ngabe kusho ukuthuthukisa ukunamathela ezintweni ezithile, ukuthuthukisa ukuguquguquka emazingeni okushisa aphansi, noma ukwenza kahle izici zokugeleza ze-geometri eziyinkimbinkimbi zokubunjwa.Imikhiqizo ye-TPU ikhasi libonisa ububanzi bezixazululo zethu eziqondene nohlelo oluthile, futhi ithimba lethu lihlale likulungele ukuxoxa ngokuthuthukiswa okwenziwa ngokwezifiso okudlulela ngalé kokunikezwa okujwayelekile kwekhathalogi. Lokhu kuzibophezela ekwenzeni ngokwezifiso kuyisisekelo senani lethu, ngoba kuqinisekisa ukuthi wonke umakhasimende uthola impahla ekahle kakhulu yomugqa wabo wokukhiqiza kanye nezidingo zokusetshenziswa kokugcina.

Iqiniso lokugcina ikhwalithi yisisekelo okwakhelwe phezu kwaso idumela eliyithenjwayo le-Dongguan Mier njengomhlinzeki we-thermoplastic polyurethane enokusebenza okuphezulu, futhi uhlelo lwethu lokuphatha ikhwalithi luklanyelwe ukuletha izinto ezihambisanayo, ezingenamasosha ngezikhathi ezithile. Imigqa yethu yokukhiqiza ethuthukile ihlanganisa imishini yesimanje yokuhlanganisa, yokwenza amaphilisi, neyokomisa egcinwa ngokucophelela futhi iqashwe njalo ukuze kuqinisekiswe ukulawula okunembile kuzo zonke izigaba zenqubo yokukhiqiza. Ukukhiqiza ngakunye kuhlolwa ngokuqinile ngaphakathi endlini, kuhlolwa izici ezibalulekile ezifana ne-melt flow index, ukuqina, amandla okudonsa, nokwelula, kuqinisekiswa ukuthi ama-TPU granules ethu ahlangabezana nezimfuneko eziqondile ezithenjiswe amakhasimende ethu. Ngaphandle kokuhlolwa kwezakhiwo ezibonakalayo, ithimba lethu lokulawula ikhwalithi lihlola ukubukeka, ukufana kombala, nokusabalalisa kobukhulu bezinhlayiyana ukuze kuqinisekiswe ukuthi ama-TPU pellets ethu awasebenzi kahle kuphela kodwa futhi acubungula kahle emishinini yamakhasimende ngaphandle kwezinkinga. Lokhu kunaka imininingwane kubonisa ukuqonda kwethu ukuthi ikhwalithi yezinto ezibonakalayo ithinta ngqo ukusebenza kahle kokukhiqiza kwamakhasimende ethu, ukuthembeka komkhiqizo, futhi ekugcineni idumela labo emakethe. Ukuzibophezela kwethu ekhwalithini kuqinisekiswa futhi ngesitifiketi sethu se-ISO9001, esiqinisekisa ukuthi izinqubo zethu zokuphatha ikhwalithi zihlangabezana namazinga aziwa ngamazwe ngamazwe okuhambisana nokuthuthuka okuqhubekayo.

Ukuthobela izindinganiso zokulawula zamazwe ngamazwe kungenye insika ebalulekile yohlelo lwethu lokuqinisekisa ikhwalithi, futhi impahla yethu ye-TPU plastic ikhiqizwa ukuze ihlangabezane nezidingo eziqinile kakhulu emakethe yomhlaba wonke. Yonke imikhiqizo yethu ye-thermoplastic polyurethane ihambisana nemithetho ye-RoHS, evimbela ukusetshenziswa kwezinto eziyingozi ezifana nomthofu, i-mercury, i-cadmium, kanye nezinto ezithile ezivimbela umlilo, iqinisekisa ukuthi izinto zethu ziphephile ukusetshenziswa ezinhlelweni ezibhekene nabathengi. Siphinde sihambisane nemithethonqubo ye-REACH, elawula ukubhaliswa, ukuhlolwa, ukugunyazwa, kanye nokukhawulelwa kwamakhemikhali ngaphakathi kwe-European Union, okunikeza amakhasimende ethu ukuzethemba ukuthi uchungechunge lwabo lokuhlinzeka luhlangabezana nezibopho eziqinile zemvelo nezokuphepha zaseYurophu. Izigaba eziningi zethu ze-TPU nazo zifanelekile ezinhlelweni zokuthintana nokudla nezokwelapha, uma nje kukhethwa isigaba esifanele futhi kugcinwa izimo ezifanele zokucubungula, futhi ithimba lethu lingahlinzeka ngemibhalo esekelayo yokuthunyelwa kwezicelo zokulawula. Izinto zethu zihlolwa yi-SGS, ukuqinisekiswa okuzimele kweqembu lesithathu okuqinisekisa ukuthi imikhiqizo yethu ihlangabezana nezimfuneko nezindinganiso ezidingekayo, okwengeza ungqimba olwengeziwe lokuqinisekisa kumakhasimende adinga ukuqinisekiswa kwangaphandle kwekhwalithi. Lokhu kusebenza okungaguquki kusuka kusigaba kuya kwesinye kungumphumela oqondile wezinqubo zethu zokukhiqiza eziqondile, ukutholwa kwezinto ezingavuthiwe ezilinganisiwe, kanye nokuphathwa okuphelele kwedatha yekhwalithi, konke lokhu kusebenza ndawonye ukunciphisa ukwehluka futhi kuqinisekiswe ukuthi yonke imithwalo yama-granules e-TPU isebenza ngokufana naleyo edlule. Indlela yethu ephelele yekhwalithi ichazwe kabanzi kwiwebhusayithi yethu.Mayelana Nathi ikhasi, futhi sikhuthaza ozakwethu abangaba khona ukuthi babuyekeze izitifiketi zethu nezinqubo zethu ngaphambi kokuba babeke ukwethemba kwabo ezixazululweni zethu ze-thermoplastic polyurethane.

Ukukhetha umthengisi ofanele wezinto ze-TPU plastic isinqumo esingamasu esinomthelela kwikhwalithi yomkhiqizo, ukusebenza kahle, nokuncintisana kwesikhathi eside, futhi i-Dongguan Mier Plastic Material Co., Ltd. inikeza izinzuzo ezihehayo ezisihlukanisa emakethe egcwele. Ithimba lethu le-R&D elinamava liyinhliziyo yomshini wethu wokusungula, futhi liletha ubuchwepheshe obuhlanganisiwe bamashumi eminyaka kusayensi yamapholima, ukuhlanganisa, nobunjiniyela bokusebenzisa kukho konke ukusebenzisana namakhasimende. Noma ngabe ikhasimende lithuthukisa umkhiqizo omusha odinga i-thermoplastic polyurethane ekhethekile noma lifuna ukuthuthukisa uhlelo olukhona, onjiniyela bethu bayasebenzisana nabo ukuthuthukisa amafomula e-TPU enziwe ngokwezifiso afana ncamashi nokusebenza, ukucubungula, nezinhloso zezindleko. Asithengisi nje izinto ezingavuthiwe; sinikeza izixazululo ezisekelwa ukubonisana kwezobuchwepheshe, ukuhlolwa kokusebenza, nokusekelwa okuqhubekayo okusuka emcabangweni wokuqala kuya ekukhiqizweni ngezinga elikhulu nangale kwalokho. Le ndlela yokusebenzisana isithole ubudlelwano besikhathi eside nabakhiqizi emikhakheni yezimoto, izicathulo, ezobuchwepheshe, nezokwelapha, abathemba i-thermoplastic polyurethane yethu ukuthi ilethe imiphumela engaguquki ezinhlelweni zabo ezidinga kakhulu.Ukusetshenziswa ikhasi linikeza ukubona okuncane kwezimboni eziningi esizisebenzela kanye nezinselele zobuchwepheshe esizixazulula nsuku zonke.

Amanani ancintisanayo nezixazululo ezingabizi kakhulu ziyisisekelo senani esilinikezayo, futhi imisebenzi yethu yokukhiqiza esebenza kahle isivumela ukuthi sinikeze ama-TPU granules asezingeni eliphezulu ngamanani asiza amakhasimende ethu ukuthi ahlale encintisana ezimakethe zawo. Lokhu kuhola kwezindleko sikuthola ngezinqubo zokukhiqiza ezithuthukisiwe, ukuthola izinto zokusetshenziswa ngobuchule, kanye nokonga ngenxa yobukhulu obuvela ekusebenzelaneni namakhasimende ahlukahlukene emhlabeni wonke, konke lokhu ngaphandle kokudela ikhwalithi noma ukusebenza kahle. Ithimba lethu elizinikele lokunakekela amakhasimende litholakala ukunikeza izimpendulo ezisheshayo, isiqondiso sobuchwepheshe, nokuxhumanisa kwezokuthutha, siqinisekisa ukuthi konke ukusebenzisana ne-Dongguan Mier kuhamba kahle, kunobuchwepheshe, futhi kuveza imiphumela. Siyaqonda ukuthi ukwethembeka kokulethwa kubaluleke njengoba kubalulekile ikhwalithi yomkhiqizo, yingakho ukuphathwa kwethu okuqinile kwe-supply chain kuqinisekisa ukutholakala okuzinzile kwe-thermoplastic polyurethane kokubili kokukhiqiza okuhleliwe kanye nezidingo eziphuthumayo. Ukuhlela kwethu kwamasu kwezimpahla nobudlelwano obuqinile nabahlinzeki kuvikela amakhasimende ethu ekuphazamisekeni kokutholakala kwempahla, futhi irekhodi lethu lokuletha ngesikhathi libonisa ukuzibophezela kwethu ekuqinisekiseni ukuthi imigqa yabo yokukhiqiza iyaqhubeka ngaphandle kokuphazamiseka. Ukwengeza, ukubamba kwethu iqhaza emibukisweni yamazwe ngamazwe kanye nokukhula kwethu okungapheli ezimakethe zaseVietnam nakwezinye izifunda kugcizelela ukufinyelela kwethu emhlabeni wonke kanye nekhono lethu lokukhonza amakhasimende ngaphesheya kwemingcele yaseChina. Siyakumema ukuthi uhlole okwethuIkhaya ikhasi ukuze ufunde kabanzi ngenkampani yethu, ithimba lethu, kanye nobubanzi obuphelele bezinto zokusetshenziswa ezingavuthiwe zeplastiki esizinikezayo, okuhlanganisa nemikhiqizo yethu eyinhloko ye-TPU.

I-TPU plastic material imele enye yezinketho ze-polymer eziguquguqukayo nezethembekile ezitholakala kubakhiqizi banamuhla, inikeza inhlanganisela engafaniswa nokuguquguquka, ukuqina, ukumelana namakhemikhali, nokucubunguleka okungaqhathaniswa nezinto ezimbalwa. Kusukela ezingxenyeni zezimoto nezicathulo zezemidlalo kuya emishinini yezokwelapha nakwezobuchwepheshe bomthengi, i-thermoplastic polyurethane iyaqhubeka nokufakazela ukubaluleka kwayo ezinhlobonhlobo zezicelo, futhi ukubaluleka kwayo kulindeleke ukuba kukhule njengoba izimboni zidinga izinto ezisimeme nezingcono kakhulu. I-Dongguan Mier Plastic Material Co., Ltd. izibeke njengozakwethu othembekile kulo mkhakha, inikeza uhla olubanzi lwemikhiqizo ye-TPU, ukuqinisekiswa kwekhwalithi okuqinile, nobuchwepheshe obudingekayo ukuthuthukisa izixazululo ezenziwe ngokwezifiso ngisho nasezicelweni eziyinselele kakhulu. Uhlelo lwethu lokuphatha ikhwalithi oluqinisekiswe yi-ISO9001, ukuthobela i-RoHS ne-REACH, nezinto ezihlolwe yi-SGS kunikeza ukuzethemba okudingwa abakhiqizi lapho bekhetha izinto ezibalulekile zomkhiqizo wabo. Ngokukhetha i-Mier njengomhlinzeki wakho we-thermoplastic polyurethane, uthola nje umthengisi wezinto kodwa uzakwethu ozinikele empumelelweni yakho, kusukela ekukhetheni kokuqala kwezinto kuya ekusekelweni kokukhiqiza nangale kwalokho. Siyakukhuthaza ukuba uthinte ithimba lethu ukuze sixoxe ngezidingo zakho ze-TPU, ucele amasampula, noma uhlole ukuthi amandla ethu okwenza amafomula ngokwezifiso angakusiza kanjani ukufeza izinhloso zakho zomkhiqizo. Xhumana nathi nge-Xhumana Nathi ikhasi, futhi ake sibonise ukuthi kungani i-Dongguan Mier ingumlingani ofanele wezidingo zakho ze-thermoplastic polyurethane.