Umehluko phakathiUhlobo lwe-TPU lwe-polytherna-uhlobo lwe-polyester
I-TPU ingahlukaniswa ngezinhlobo ezimbili: uhlobo lwe-polythene kanye nohlobo lwe-polyester. Ngokwezidingo ezihlukile zezicelo zomkhiqizo, izinhlobo ezahlukene zeTPU zidinga ukukhethwa. Isibonelo, uma izidingo zokumelana ne-hydrolysis ziphakeme kakhulu, uhlobo lwe-polyther Type TPU lufanele ukwedlula uhlobo lwe-polyester TPU.
Ngakho-ke namuhla, ake sikhulume ngomehluko phakathiuhlobo lwe-polythere tpuna-uhlobo lwe-polyester tpu, nokuthi ungabahlukanisa kanjani? Okulandelayo kuzocacisa ngezinto ezine: umehluko ngezinto zokwenziwa okuluhlaza, umehluko wesakhiwo, ukuqhathanisa ukusebenza, kanye nezindlela zokuhlonza.
1, umehluko ngezinto ezingavuthiwe
Ngikholwa ukuthi abantu abaningi bawazi umqondo wama-thermoplastic lastomers, anesici sesakhiwo sokuba nezingxenye ezithambile nezilukhuni, ngokulandelana, ukuletha ukuguquguquka nokuqina kokuqukethwe.
I-TPU futhi inezingxenye zombili ezithambile nezilukhuni, nomehluko phakathi kohlobo lwe-polyther TPU ne-polyester TPU lilele emaphethelweni ezingxenyeni ezithambile ze-chain. Singabona umehluko kusuka ezintweni zokwenziwa ezingavuthiwe.
Uhlobo lwe-polythere TPU: 4-4 '- I-Diphylmethane Diisocyanate (MDI), i-polytetrahydroforan (PTMeG), 1,4-Butanediol (BDE), i-40% ye-PTMeG, ne-20% ye-BDEG, ne-20% ye-BDE.
Uhlobo lwePolyester TPU: 4-4 '- I-Diphylmenethane Diisocyanate (MDI), 1,4-Butanediol (BDO), i-adipic acid (aa), nge-accounting ye-MDI cishe ngo-35%, kanye ne-accounting ecishe ibe ngu-25%.
Siyabona ukuthi impahla eluhlaza yohlobo lwe-polyther TPU LOFT TPU SOFT Chain Segment yi-PolytetrahyDroferan (PTMeG); Izinto ezivuthiwe zohlobo lwe-polyester TPU ezithambile ze-TPU ezithambile (AA), lapho i-adipic acid isabela nge-butanediol ukwenza i-polybutylene adipate adipate ester njengengxenye ye-polybutylene adipate ester njengengxenye ye-soft chain.
2, umehluko wesakhiwo
Uchungechunge lwama-molecular of TPU lunesakhiwo (ab) n-Type block block serfler, lapho isisindo esiphakeme se-molecular (1000-6000) polyerester noma i-polyther, uhlobo lwamakhemikhali phakathi kwe-ab chain izingxenye, kanye nesakhiwo samakhemikhali phakathi kwe-diisocyanate.
Ngokwezinhlaka ezahlukahlukene ze-A, i-TPU zingahlukaniswa ngohlobo lwe-polyester, uhlobo lwe-polyther, uhlobo lwe-polycaprobonactone, uhlobo lwe-polycarbonacte, njll. Izinhlobo ezijwayelekile ziwuhlobo lwe-polythert TPU.
Kulesi sibalo esingenhla, singabona ukuthi amaketanga ama-polyther awonke izinhlobo ze-polyther TPU ne-polyester yohlobo lwezinhlaka zomugqa, ngomehluko omkhulu ukuthi ingxenye ye-polyther pollol noma i-polyester polyl.
3, ukuqhathanisa ukusebenza
Ama-polytheate polyols ama-polymers atshwala noma ama-oligomers anamaqembu e-ether namaqembu e-hydroxyl emaqenjini okugcina ekwakhekeni kwe-molecular main chain sakhiwo. Ngenxa yamandla ayo aphansi aphansi ama-ether abondo esakhiweni sawo kanye nokushintshana.
Ngakho-ke, i-polyther TPU inokulinganiswa okuhle kakhulu kwezinga lokushisa, ukumelana ne-hydrolysis, ukumelana kokubumba, ukumelana kwe-UV, njll. Umkhiqizo unomuzwa omuhle wamuzwa, kepha amandla we-fracture ampofu.
Amaqembu e-Ester anamandla anamandla okubopha amandla e-polyester polyols angakha ama-hydrogen bond ngezingxenye ezinzima zamaketanga, esebenza njengamaphuzu wokunqamula. Kodwa-ke, i-polyester ithambekele ekuqhekekeni ngenxa yokuhlaselwa kwama-molecule amanzi, futhi i-acid ekhiqizwe yi-hydrolysis ingahle isebenze kahle i-hydrolysis ye-polyester ye-pollester.
Ngakho-ke, i-polyester TPU inezakhiwo ezinhle kakhulu zemishini, ukugqoka ukumelana, ukumelana nezinyembezi, ukumelana kwamakhemikhali, ukumelana okuphezulu, kanye nokuqina okulula, kepha ukumelana kwe-hydrolysis.
4, Indlela Yokuhlonza
Njengoba i-TPU ingcono ukuyisebenzisa, ingashiwo kuphela ukuthi ukukhethwa kufanele kususelwe kwizidingo zomkhiqizo zomkhiqizo. Ukufeza izakhiwo ezinhle zemishini, sebenzisa i-polyester tpu; Uma kucatshangelwa izindleko, ukuhlukunyezwa, kanye nemvelo yokusetshenziswa komkhiqizo, njengokwenza imikhiqizo yokuzijabulisa kwamanzi, ama-polythelekile i-TPU efanelekile.
Kodwa-ke, lapho ukhetha, noma ngengozi ukuxuba izinhlobo ezimbili ze-TPUS, azinawo umehluko omkhulu ngokubukeka. Ngakho-ke kufanele sibahlukanise kanjani?
Kunezindlela eziningi, ezinjenge-comiletricry yamakhemikhali, igesi ye-chromatography-mass spectrometry (GCMS), i-Mid Exprared Spectroscopy, njll. Noma kunjalo, lezi zindlela zidinga isikhathi eside.
Ingabe ikhona indlela elula yokuhlonza futhi esheshayo? Impendulo inguyebo, ngokwesibonelo, indlela yokuqhathanisa ye-density.
Le ndlela idinga kuphela umhloli we-density eyodwa. Ukuthatha imitha ye-curber ephezulu yerabha njengesibonelo, izinyathelo zokulinganisa yilezi:
Beka umkhiqizo etafuleni lokulinganisa, bonisa isisindo somkhiqizo, bese ucindezela ukhiye we-ENTER ukuze ukhumbule.
Beka umkhiqizo ngamanzi ukubonisa inani lobudala.
Inqubo yonke yokulinganisa ithatha cishe imizuzwana emi-5, khona-ke ingahlukaniswa ngokususelwa emthonjeni wokuthi ubuntu bokuqina kwe-polyester TPU buphakeme kunaleso sohlobo lwe-polyther tPU. Uhla olucacisiwe lwabantu bokuthi: uhlobo lwe-polyther TPU -1.13-1.1..CM3; I-Polyester TPU -1.18-1.22 g / cm3. Le ndlela ingahlukanisa ngokushesha phakathi kweTPU Polyester Type kanye nohlobo lwe-polyther.
Isikhathi sePosi: Jun-03-2024