Izakhiwo ze-TPU Film ezingangeni manzi futhi ezivumela umswakama ukungena

Umsebenzi oyinhloko weIfilimu ye-Thermoplastic Polyurethane (TPU)itholakala ngezakhiwo zayo ezingavamile zokungangenwa kwamanzi kanye nokungena komswakama—ingavimba amanzi angcolile ukuthi angangeni ngenkathi ivumela ama-molecule omhwamuko wamanzi (ukujuluka, ukujuluka) ukuba adlule.

1. Izinkomba Zokusebenza kanye Nezindinganiso

1. Ukumelana Nokungenwa Yimanzi (Ukumelana Nokucindezela Okungamanzi):
   • Isikhombisi: Silinganisa ikhono lefilimu lokumelana nokucindezela kwamanzi kwangaphandle, okukalwa ngama-kilopascals (kPa) noma amamilimitha ekholomu yamanzi (mmH₂O). Inani eliphakeme libonisa ukusebenza okuqinile kokungangeni manzi. Isibonelo, izingubo zangaphandle ezivamile zingadinga ≥13 kPa, kuyilapho imishini yezinga lochwepheshe ingadinga ≥50 kPa.
   • Izinga Lokuhlola: Kuvame ukuhlolwa kusetshenziswa i-ISO 811 noma i-ASTM D751 (Indlela Yokugqabhuka Kwamandla). Lokhu kuhilela ukwandisa ingcindezi yamanzi njalo ohlangothini olulodwa lwefilimu kuze kube yilapho kuvela amaconsi amanzi kolunye uhlangothi, kuqoshwa inani lengcindezi kulelo phuzu.
2. Ukuvunyelwa komswakama (Ukudluliselwa komusi):
   • Inkomba: Ilinganisa isisindo somhwamuko wamanzi odlula endaweni yeyunithi yefilimu ngesikhathi seyunithi, esivezwa ngamagremu ngemitha yesikwele ngamahora angama-24 (g/m²/24h). Inani eliphakeme libonisa ukuphefumula okungcono kanye nokushabalalisa ukujuluka. Ngokuvamile, inani elidlula ama-5000 g/m²/24h libhekwa njengeliphefumula kakhulu.
   • Izinga Lokuhlola: Kunezindlela ezimbili eziyinhloko:
     • Indlela Yendebe Eqondile (Indlela Yokukhipha Umswakama): isib. I-ASTM E96 BW. I-desiccant ifakwa endebeni, ivalwe ngefilimu, bese kulinganiswa inani lomhwamuko wamanzi omuncwa ngaphansi kwezimo ezithile zokushisa nomswakama. Imiphumela isondelene nezimo zangempela zokuguguleka.
     • Indlela Yendebe Eguquliwe (Indlela Yamanzi): isib., i-ISO 15496. Amanzi afakwa endebeni, eguquliwe futhi ivalwe ngefilimu, bese kulinganiswa inani lomhwamuko wamanzi ophuma ngefilimu. Le ndlela ishesha futhi ivame ukusetshenziswa ekulawuleni ikhwalithi.

2. Isimiso Sokusebenza

Izakhiwo ezingangeni manzi nezingena umswakama zeIfilimu ye-TPUazifinyelelwa nge-pores ebonakalayo kodwa zithembele esenzweni sezinga lama-molecule sezingxenye zayo ze-hydrophilic chain:

• Ayingeni manzi: Ifilimu ngokwayo iminyene futhi ayinazo izimbobo; amanzi acwebezelayo awakwazi ukudlula ngenxa yokucindezeleka kobuso bayo kanye nesakhiwo sama-molecule efilimu.
• Umswakama Ongena: I-polymer iqukethe amaqembu athanda amanzi (isb., -NHCOO-). La maqembu “abamba” ama-molecule omhwamuko wamanzi aphuma esikhumbeni esingaphakathi. Bese kuthi, “ngokunyakaza kwengxenye” kwamaketanga e-polymer, ama-molecule amanzi “adluliselwa” kancane kancane esuka ngaphakathi aye endaweni engaphandle.

3. Izindlela Zokuhlola

1. Isivivinyo Sokucindezela Okungangenisi I-Hydrostatic: Sisetshenziselwa ukukala ngokunembile ingcindezi yomkhawulo wamanzi wefilimu noma indwangu.
2. Indebe Yokuvumela Umswakama: Isetshenziswa ngaphakathi kwegumbi lokushisa elihlala njalo kanye nomswakama ukukala izinga lokudluliselwa komswakama (MVTR) kusetshenziswa indlela yendebe eqondile noma eguquliwe.

4. Izicelo

Ukusebenzisa lezi zakhiwo,Ifilimu ye-TPUkuyindlela ekhethwayo yezinhlelo zokusebenza eziningi ezisezingeni eliphezulu:

• Izingubo Zangaphandle: Ingxenye ebalulekile kumajakethi aqinile, ukugqokwa kwe-ski, kanye namabhulukwe okuhamba ngezinyawo, okuqinisekisa ukoma kanye nenduduzo kubathandi bangaphandle emoyeni nasemvuleni.
• Ukuvikelwa Kwezokwelapha: Kusetshenziswa ezingutsheni zokuhlinzwa kanye nezingubo zokuzivikela ukuvimba igazi kanye noketshezi lomzimba (olungangeni manzi) ngenkathi kuvumela ukujuluka okukhiqizwa abasebenzi bezokwelapha ukuba kuphume, kunciphisa ukucindezeleka kokushisa.
• Ukulwa Nomlilo Nokuqeqeshwa Kwezempi: Kuhlinzeka ngokuvikelwa ezindaweni ezimbi kakhulu, kudinga ukumelana nomlilo, amanzi, namakhemikhali, kanye nokuphefumula okuphezulu ukuze kugcinwe ukuhamba nokusebenza kahle.
• Izinto Zokwenza Izicathulo: Zisetshenziswa njengezinto zokufaka amasokisi angangeni manzi (amabhuthi) ukugcina izinyawo zomile ezimweni zemvula ngenkathi zivimbela ukushisa kwangaphakathi kanye nokwanda komswakama.

Ngamafuphi, ngesakhiwo sayo esiyingqayizivele somzimba nesamakhemikhali, ifilimu ye-TPU ilinganisela ngobuchule izidingo ezibonakala ziphikisana “zokungangeni manzi” kanye “nokuphefumuleka,” okwenza ibe yinto ebalulekile ebalulekile emkhakheni wezindwangu ezisebenza kahle kakhulu.