1. Isishwankathelo seTPU
I-Polyurethane ye-Thermoplastic (TPU)yi-elastomer ye-linear block copolymer esebenza kakhulu edibanisa iimpawu eziphezulu zerabha kunye neplastiki yobunjineli. Ibonisa ukuthamba okugqwesileyo, amandla oomatshini, ukumelana nokuguguleka, kunye nokukwazi ukucutshungulwa kwe-thermoplastic. Ngokungafaniyo nerabha yendabuko edityanisiweyo, i-TPU inezakhiwo ezidityanisiweyo zomzimba eziguqulwayo ezenziwe ziibhondi ze-hydrogen, ezivumela ukufudumeza okuphindaphindiweyo, ukunyibilika kunye nokubumba ngaphandle kokonakala okubonakalayo kokusebenza. Le propati ikhethekileyo yenza i-TPU ibe yenye yezona zinto ziguquguqukayo ze-thermoplastic elastomer (TPE) ezisetyenziswa kakhulu kwimveliso yemizi-mveliso, kwiimpahla zabathengi, kwiimoto, kwezonyango nakwezinye iindawo.
Ukusebenza kweemveliso zeTPU ezigqityiweyo kuxhomekeke kakhulu kulwakhiwo lwayo lwezinto eziluhlaza, umlinganiselo wokulinganisela kunye nenkqubo yokwenza ipolymer. Zonke izixhobo zeTPU zorhwebo zenziwe ipolymer kwizixhobo ezintathu eziphambili: iipolyols ezinemixokelelwane emide, ii-diisocyanates, kunye nee-extenders zemixokelelwane emifutshane.
2. Izinto ezisisiseko zeTPU
I-TPU yi-copolymer yebhloko ehlukanisiweyo eyenziwe ngamacandelo athambileyo atshintshanayo kunye namacandelo aqinileyo. Amacandelo athambileyo anika i-TPU ukuguquguquka, ukuqina kunye nokumelana nobushushu obuphantsi, ngelixa amacandelo aqinileyo enika ukuqina, amandla okuxinana, ukumelana nokuguguleka kunye nokuzinza kobushushu. Izinto ezintathu ezibalulekileyo zihambelana nokwakheka kwezi zakhiwo zimbini zamacandelo ngokulandelelana.
2.1 IiPolyols ezinemixokelelwane emide (Izinto ezithambileyo zeCandelo eliluhlaza)
Iipolyols ezinemixokelelwane emide (iidiols ezinemixokelelwane emide) zezona zinto ziphambili zokwenza amacandelo athambileyo e-TPU, ezinobunzima bemolekyuli obuqala kwi-1000 ukuya kwi-3000 g/mol. Zingumthombo ophambili wokuguquguquka kwe-TPU kunye nokuguquguquka kwayo. Ngokwesakhiwo seekhemikhali, iipolyols zahlulwe kakhulu zibe ziindidi ezimbini, ezimisela udidi olusisiseko kunye nomahluko wokusebenza kwe-TPU.
I-PolyesterI-Polyol: Yenziwe kwi-polycondensation reaction ye-dicarboxylic acids kunye ne-diols. I-TPU eveliswe kwi-polyester polyols inamandla abalaseleyo oomatshini, ukumelana nokukrala, ukumelana neoyile kunye nokumelana nokuguga. Inamandla aphezulu okutsalwa kunye nokumelana nokukrazuka, kwaye ifanelekile ukuvelisa iindawo ezigugileyo, izitywino zoshishino, izixhobo zezihlangu kunye neemveliso zokuncamathelisa. Nangona kunjalo, i-TPU esekelwe kwi-polyester inokumelana nokukrala kwe-hydrolysis okuphantsi kunye nokuqina kobushushu obuphantsi, kwaye ithambekele kwi-hydrolysis kunye nokuwohloka kwiindawo ezifumileyo ixesha elide.
I-PolyetherI-Polyol: Yenziwe nge-polymerization evela kwi-ring-opening polymerization yee-ether monomers. I-TPU esekelwe kwi-polyether inokumelana okuhle kakhulu ne-hydrolysis, ukuguquguquka kobushushu obuphantsi, ukumelana namanzi kunye nokumelana neentsholongwane. Ihlala iguquguquka kwaye izinzile kwiindawo ezinobushushu obuphantsi kakhulu, kwaye akulula ukuyitshabalalisa ngenxa yokufuma kunye neebhaktheriya. Isetyenziswa kakhulu kwiifilimu ezingangeni manzi, izixhobo zangaphantsi kwamanzi, ii-sheaths zentambo kunye neentambo, kunye neendawo ezimelana nobushushu obuphantsi. Iintsilelo zayo zikwimeko yokungagugi kancinci kunye nokumelana neoyile xa kuthelekiswa ne-polyester TPU.
2.2 IiDiisocyanates (Izinto ezilukhuni zeCore Core Raw Material)
IiDiisocyanates zii-monomers ezisabelayo eziqulathe amaqela asebenzayo e-NCO, asabela ngamaqela e-hydroxyl ee-polyols kunye nee-chain extenders ukuze enze izakhiwo ze-hard segment segment eziqinileyo, kwaye zibalulekile ekumiseleni ubulukhuni, ukuqina kunye nokuzinza kobushushu be-TPU. Eyona diisocyanate isetyenziswa kakhulu kwimveliso ye-TPU yemizi-mveliso yi-MDI (Methylene Diphenyl Diisocyanate), eneempawu zeekhemikhali ezizinzileyo, umsebenzi ophezulu wokuphendula kunye nokuguquguquka okuphantsi, kwaye ifanelekile kwiimveliso ezininzi ze-TPU ngokubanzi kunye nokusebenza okuphezulu.
Ukongeza, ii-diisocyanates zodidi olukhethekileyo ezifana ne-HDI kunye ne-IPDI zisetyenziselwa ukwenza i-aliphatic TPU. I-TPU enjalo ayinaso isakhiwo sendandatho ye-benzene kwikhonkco le-molecular, ibonisa ukumelana okutyheli kakhulu, uzinzo lokukhanya kunye nokumelana nemozulu, kwaye isetyenziselwa ngokukodwa iimveliso zangaphandle, iindawo zokuhombisa ezibonakalayo, iindawo zangaphandle zeemoto kunye neemveliso ezihambelana nombala ophezulu.
2.3 Izandiso zeTyathanga ezimfutshane (Izinto eziLungileyo eziNcedisayo zeCandelo eliQiqileyo)
Izandisi zetyathanga zii-diols ezimfutshane ezine-molecular weight ephantsi (ikakhulu i-1,4-Butanediol, BDO), ezisabela kunye ne-diisocyanates ezingaphezulu ukuze zenze iindawo ezixineneyo ze-hard segment. Zidlala indima ebalulekileyo ekulungiseni ubulukhuni, i-modulus kunye neempawu zoomatshini ze-TPU. Ngokutshintsha umlinganiselo wokongeza we-chain extends, abavelisi banokulawula ngokuchanekileyo uluhlu lobulukhuni be-TPU ukusuka kwi-60 Shore A (imeko yerabha ethambileyo) ukuya kwi-85 Shore D (imeko yeplastiki eqinileyo).
Isakhiwo secandelo eliqinileyo esenziwe zi-chain extenders kunye ne-diisocyanates senza iindawo zokudibanisa ezibonakalayo ngokusebenzisa i-hydrogen bonding phakathi kwe-molecular chains, nto leyo eqinisekisa ukuba i-TPU inobungqindilili obufana nerabha kubushushu begumbi, kwaye inokunyibilika kwaye ihambe kubushushu obuphezulu ukuze ifakelwe i-injection molding, i-extrusion, i-blow molding kunye nezinye izinto ezisetyenziswa kwi-thermoplastic processing.
3. Uhlu lweTPU olusekelwe kwiFomula yezinto eziluhlaza
Ngokweentlobo zezinto eziluhlaza ze-polyol, izinto eziluhlaza ze-TPU zoshishino zahlulwe kakhulu zaba ziintlobo ezintathu, ezigubungela uninzi lweemeko zesicelo:
I-TPU yePolyester: Ilawulwa zizinto eziluhlaza zepolyester polyol, ezinamandla aphezulu, ukumelana nokuguguleka kunye nokumelana neekhemikhali, zifanelekile kwiindawo ezinganyangekiyo kwimizi-mveliso, izihlangu, iifilimu zesikhumba kunye nezinto zokubopha.
I-TPU yePolyether: Isekelwe kwizixhobo ze-polyol eluhlaza ze-polyether, ezinokumelana okuphezulu kwe-hydrolysis kunye nokusebenza okuphantsi kobushushu, ezisetyenziswa kakhulu kwiifilimu ezingangeni manzi, izixhobo zonyango, izixhobo zekhebula kunye nezixhobo ezimelana nokubanda.
I-TPU eGuquliweyo ekhethekileyo: Ngokusekelwe kwizixhobo ezintathu ezisisiseko, yongeza izongezo ezisebenzayo (izithinteli zomlilo, ii-anti-ultraviolet agents, izithinteli zobushushu, njl.njl.) okanye usebenzise iifomyula ze-polyol ezidityanisiweyo ukuvelisa izixhobo ze-TPU ezithintela umlilo, ezimelana nemozulu, ezicacileyo, ezilwa neentsholongwane kunye nezinye izinto ezikhethekileyo ze-TPU kwiimeko ezenziwe ngokwezifiso eziphezulu.
4. Iimpawu eziphambili ezichongwa zizinto eziluhlaza
Umlinganiselo wokufanisa kunye nohlobo lwezinto ezikrwada ze-TPU zimisela ngokuthe ngqo ukusebenza kokugqibela kwezinto, zibonisa iimpawu ezicacileyo ezilungisekayo:
- Ukulungiswa koBulukhuni: Ukulungisa umlinganiselo weendawo eziqinileyo (i-diisocyanate + i-chain extender) kunokufezekisa utshintsho oluqhubekayo lobunzima be-TPU, lugubungela i-elastomer ethambileyo kwiplastiki yobunjineli eqinileyo.
- Iipropati zoomatshini: Izinto eziluhlaza zePolyester zinika amandla aphezulu okutsalwa kunye nokumelana nokuguguleka; izinto eziluhlaza zePolyester ziphucula ukuqina kunye nokumelana nokudinwa.
- Ukuguquguquka kokusingqongileyo: I-Polyether TPU imelana ne-hydrolysis kunye nobushushu obuphantsi; izinto eziluhlaza ze-aliphatic diisocyanate ziphucula ukumelana nemozulu kunye nokusebenza kokulwa nombala otyheli.
- Ukusebenza kokucubungula: Ukusasazwa kobunzima bemolekyuli bezinto eziluhlaza ngokufanelekileyo kuqinisekisa ukunyibilika kakuhle, okuvumela i-TPU ukuba ikwazi ukuziqhelanisa neetekhnoloji ezahlukeneyo zokucubungula i-thermoplastic kwaye ixhase ukuphinda kusetyenziswe kwakhona.
5. Iimpawu zeMveliso kunye nokuCwangciswa
Izinto eziluhlaza zeTPU ziveliswa yi-bulk polymerization okanye i-solution polymerization. Emva kokulinganisa ngokuchanekileyo ii-polyols, ii-diisocyanates kunye nee-chain extenders, izinto zifakwa kwi-polymerization yobushushu obuphezulu, i-chain extension reaction, i-cooling kunye ne-pelletizing ukuze zenze izinto eziluhlaza ze-TPU pellet ezifanayo. Yonke inkqubo yemveliso ayinazo ii-plasticizers, kwaye izinto eziluhlaza ezigqityiweyo azinabungozi kwaye zinobuhlobo nokusingqongileyo, zihlangabezana nemigangatho yokhuseleko lokusingqongileyo yehlabathi efana ne-RoHS kunye ne-REACH.
Njengezinto ezisetyenziswa kwi-thermoplastic, ii-TPU green material pellets zinokucutshungulwa ngokuthe ngqo zizixhobo zeplastiki eziqhelekileyo. Izinto eziseleyo kunye neemveliso zenkunkuma eziveliswa ngexesha lokucubungula zinokuphinda zisetyenziswe, zinyibilikiswe kwaye zisetyenziswe kwakhona, ngokulahleka kwezinto okuphantsi kunye nesantya esiphezulu sokusetyenziswa kwezixhobo, okuhambelana nomkhwa wophuhliso lwemveliso eluhlaza.
6. Izicelo eziphambili zeTPU Raw Materials
Zixhamla ekusebenzeni okuhlengahlengiswayo kweefomyula zezinto eziluhlaza, izinto eziluhlaza zeTPU zisetyenziswa kakhulu kumashishini amaninzi:
- Ishishini leeMoto: Iindawo zangaphakathi zeemoto, iindawo ezifunxa ukutshayiswa, iipayipi ezingangeni manzi, iintambo kunye neeshelufu zekhebula, ezixhomekeke kukuqina okuphezulu kunye nokumelana nemozulu kwezinto eziluhlaza zeTPU eziguquliweyo.
- Iimpahla zabathengi kunye nezihlangu: Izihlangu zezemidlalo, iikheyiji zokukhusela iifowuni, izixhobo zemithwalo, iibhanti ezithambileyo, ezisebenzisa ukuthamba okuphezulu kunye nokumelana nokuguguleka kwe-polyester TPU.
- Iimfuno zezonyango nezemihla ngemihla: Ii-catheter zonyango, izixhobo zokukhusela, izixhobo zodidi lokutya, ezisebenzisa izixhobo ze-TPU ezikhuselekileyo ekutyeni kunye ne-hydrolysis engangenisi manzi.
- Ukwenziwa kweMizi-mveliso: Iigasket ezingagugiyo, iibhanti zokuhambisa, iipayipi ze-hydraulic, iifilimu ezincamathelayo, zisebenzisa ngokupheleleyo amandla aphezulu kunye nokuzinza kweekhemikhali kwezinto ezikrwada ze-TPU.
- Ishishini elitsha lamandla kunye nele-elektroniki: Iifilimu ezikhusela ibhetri, izixhobo zebhodi yesekethe eziguquguqukayo, iindawo zokukhusela ezithintela ilangabi, kusetyenziswa izinto eziluhlaza zeTPU ezithintela ilangabi ezilungisiweyo kunye nezinto ezithintela ilangabi eziphezulu.
7. Indlela yoPhuhliso lwezixhobo zeTPU Raw
Ngokuphuculwa kwemveliso yemizi-mveliso kunye nokuphuculwa kweemfuno zokhuseleko lokusingqongileyo, izinto ezikrwada ze-TPU ziyaphuhliswa zijolise ekusebenzeni okuphezulu, ukukhuselwa kokusingqongileyo kunye nokwenza ngokwezifiso. Eli shishini lizimisele ukuphanda nokuphuhlisa izinto ezikrwada ze-polyol ezisekelwe kwi-bio ukuze zithathe indawo yezinto ezikrwada zemveli ezisekelwe kwi-petroleum, ukunciphisa ukukhutshwa kwekhabhoni. Kwangaxeshanye, ukumelana nemozulu ephezulu, ukubambezeleka komlilo okuphezulu, ukucaca okuphezulu kunye nezinto ezikrwada ezikhethekileyo ze-TPU ezimelana nobushushu obuphantsi zihlala zihlaziywa ukuze kuhlangatyezwane neemfuno zokusebenza ezingqongqo zamandla amatsha, i-aerospace, ezonyango eziphezulu kunye nezinye iindawo ezikhulayo. Ukongeza, izinto ezikrwada ze-TPU ezihlengahlengisiweyo ezinokuphinda zisetyenziswe kwaye zibole ziye zaba yindlela ephambili yophando, ekhuthaza uphuhliso oluzinzileyo lweshishini le-TPU.
Ixesha lokuthumela: Juni-15-2026