Chiyambi cha Magawo a Kukana kwa Hydrolysis a Zipangizo za TPU

Kukana kwa hydrolysis kwa TPUlimatanthauza kuthekera kwake kukana "kuukira" ndi chinyezi ndikuletsa kuwonongeka kwa magwiridwe antchito. Mphamvu imeneyi imatsimikiziridwa ndi kapangidwe ka mankhwala ndi zowonjezera za TPU, ndipo ndi chizindikiro chofunikira chowunikira kudalirika kwake kwa nthawi yayitali m'malo ozizira kapena pansi pa madzi.

Chinthu Chofunika Kwambiri: Chopangidwa ndi polyester vs.TPU yochokera ku polyether

Kusiyana kwakukulu kwa kukana kwa hydrolysis kumachokera ku kapangidwe ka "gawo lofewa" mkati mwa unyolo wa mamolekyu.

• TPU yochokera ku polyester: Ma ester bonds mu molecular chain amatha kugwidwa ndi hydrolysis, zomwe zimapangitsa kuti magwiridwe antchito awo awonongeke kwambiri m'malo otentha komanso achinyezi. Chifukwa chake, imakhala ndi kukana kochepa kwa hydrolysis.
• TPU yochokera ku Polyether: Ma ether bond mu unyolo wa mamolekyu ndi okhazikika komanso osagwirizana ndi hydrolysis, zomwe zimapangitsa kuti hydrolysis ikhale yolimba kwambiri. Izi zimapangitsa kuti ikhale chisankho chabwino kwambiri pakugwiritsa ntchito madzi apansi pamadzi kapena chinyezi chambiri.

Mwachidule: Pa ntchito zomwe zimafuna kukhudzana kwa nthawi yayitali ndi madzi kapena malo onyowa, TPU yokhala ndi polyether iyenera kuyikidwa patsogolo.

Zizindikiro Zowunikira Pakati

Kukana kwa hydrolysis nthawi zambiri kumayesedwa kudzera mu mayeso ofulumira a ukalamba, kuyang'ana kwambiri pazigawo zofunika izi:

• Kuchuluka kwa Kusunga Mphamvu Yokoka: Chiwerengero cha mphamvu yokoka yomwe imasungidwa ikakalamba poyerekeza ndi mtengo woyambirira. Kusunga kwambiri kumasonyeza kukana bwino kwa hydrolysis; makampani nthawi zambiri amafuna ≥80%.
• Kusintha kwa Kutalika kwa Zinthu Pa Nthawi Yopuma: Kumayesa kusintha kwa kusinthasintha kwa zinthu. Kusintha pang'ono kumasonyeza kuti zinthu zikuyenda bwino.
• Kusintha kwa Kuuma: Kumasonyeza kusintha kwa kuuma kwa pamwamba. Kusintha pang'ono kumasonyeza kukhazikika bwino kwa zinthu zambiri.
• Mawonekedwe Owoneka: Yang'anani ngati pamwamba pa chitsanzocho pakuwonetsa zizindikiro za kuwonongeka monga kusweka, kutupa, kapena choko.

Njira ndi Miyezo Yoyesera

Kukana kwa hydrolysis kumayesedwa kudzera mu mayeso ofulumira a ukalamba. Miyezo yayikulu ikuphatikizapo:

• ISO 4611: Muyezo wapadziko lonse lapansi wokhudza kukalamba kwa pulasitiki.
• ASTM D570: Njira yoyesera yoyezera madzi a pulasitiki.
• DIN 53366: Imagwiritsidwa ntchito pogawa kukhazikika kwa hydrolysis ya zinthu.

Mikhalidwe yodziwika bwino yoyesera ndi 70°C / 95% Relative Humidity (RH) kwa maola mazana ambiri mpaka zikwi, ndi zitsanzo za nthawi ndi nthawi kuti ziwone kusintha kwa magwiridwe antchito.

Njira Zowongolera Kukana kwa Hydrolysis

Ngati kukana kwa hydrolysis kwa TPU yochokera ku polyester sikukwanira, njira zotsatirazi zingagwiritsidwe ntchito:

1. Onjezani Zokhazikika za Hydrolysis: Njira imodzi yothandiza kwambiri ndi kuwonjezera polycarbodiimide (PCD) kapena mankhwala ena oletsa hydrolysis. Izi "zimakonza" maunyolo osweka a mamolekyu ndikuchedwetsa kuwonongeka.
2. Konzani Kapangidwe ka Mamolekyu: Kusankha ma polyester polyol okhala ndi kulemera kwakukulu kwa mamolekyu, maunyolo ataliatali, kapena kapangidwe ka nthambi kungathandizenso kukhazikika kwa hydrolysis pamlingo wina.

Chidule ndi Malangizo Osankha

• Chosankha Chofunika: M'malo ozizira, perekani TPU yokhala ndi polyether patsogolo.
• Maziko Owunikira: Yesani kuchuluka kwa TPU poyerekeza kuchuluka kwa mphamvu yogwirira ntchito ndi deta ina yochokera ku mayeso okalamba.
• Kulinganiza Ndikofunikira: Dziwani kuti TPU yochokera ku polyether ikhoza kukhala ndi mphamvu zochepa zamakina komanso kukana kutentha poyerekeza ndi mitundu yochokera ku polyester. Kulinganiza pakati pa kukana kwa hydrolysis ndi makhalidwe amakina kuyenera kuchitika.

Kumvetsetsa magawo awa kudzakuthandizani kusankha zinthu zoyenera za TPU pa malonda anu, ndikutsimikizira kudalirika kwa nthawi yayitali pamalo omwe mukufuna.

ZokhudzaMalingaliro a kampani Yantai Linghua New Material Co., Ltd.

Yantai Linghua New Material Co., Ltd. ili ndi luso lofufuza ndi kukonza zinthu komanso kupanga zinthu pogwiritsa ntchito TPU yopangidwa ndi polyether. Monga kampani yogulitsa TPU yaukadaulo, yomwe idakhazikitsidwa mu 2010, kampaniyo yakula kukhala kampani yogulitsa zinthu zonse, kuphatikiza malonda a zinthu zopangira, kafukufuku ndi kukonza zinthu, komanso kupanga ndi kugulitsa zinthu.

Zogulitsa zake za TPU zochokera ku polyether, zomwe zimatengera kapangidwe ka ether bond mu unyolo wa mamolekyulu, zimapangitsa kuti zinthuzi zikhale ndi kukana kwabwino kwa hydrolysis, kutentha kochepa (mpaka -40°C ndi pansi), komanso kukana kwambiri bowa. Kuphatikiza apo, zogulitsazi zimakhala ndi mphamvu zambiri zamakaniko, kukana kukwawa bwino, komanso kusinthasintha bwino, pomwe zikutsatira zofunikira zapadziko lonse lapansi kuphatikiza REACH, RoHS, ndi FDA. Pogwiritsa ntchito izi, zogulitsa za polyether TPU za Linghua New Materials zimagwiritsidwa ntchito kwambiri mu waya ndi zingwe, zida zamagalimoto, mapayipi oyaka moto, machubu ndi mapaipi, ndi nsapato - ntchito zamafakitale ndi zamakasitomala zomwe zimafuna kukana kwanyengo komanso kukhazikika kwa nthawi yayitali.