TPU Film's Waterproof thiab Moisture-Permeable Properties

Lub ntsiab functionality ntawmThermoplastic Polyurethane (TPU) zaj duab xislies nyob rau hauv nws tshwj xeeb waterproof thiab ya raws-permeable zog-nws tuaj yeem thaiv cov dej los ntawm kev nkag mus thaum tso dej vapor molecules (hws, hws) dhau mus.

1. Cov ntsuas kev ua tau zoo thiab cov qauv

1. Waterproofness (Hydrostatic Pressure Resistance):
   • Qhov taw qhia: Ntsuas cov yeeb yaj kiab muaj peev xwm tiv taus cov dej sab nraud, ntsuas hauv kilopascals (kPa) lossis millimeters ntawm kab dej (mmH₂O). Tus nqi siab dua qhia tias muaj zog ua haujlwm tsis muaj dej. Piv txwv li, cov khaub ncaws sab nraum zoov tsis tu ncua yuav xav tau ≥13 kPa, thaum cov khoom siv qib siab yuav xav tau ≥50 kPa.
   • Test Standard: Feem ntau sim siv ISO 811 los yog ASTM D751 (Burst Strength Method). Qhov no suav nrog txuas ntxiv nce dej siab ntawm ib sab ntawm zaj duab xis kom txog thaum cov dej ntws tawm ntawm sab nraud, sau cov nqi siab ntawm qhov taw tes.
2. Moisture Permeability (Vapor Transmission):
   • Qhov taw qhia: Ntsuas qhov loj ntawm cov dej vapor dhau los ntawm ib cheeb tsam ntawm cov yeeb yaj kiab hauv ib lub sijhawm, qhia hauv grams ib square meter ib 24 teev (g / m² / 24h). Tus nqi siab dua qhia tau zoo dua breathability thiab tawm hws. Feem ntau, tus nqi siab tshaj 5000 g / m² / 24h yog suav tias yog breathable.
   • Test Standard: Muaj ob txoj hauv kev tseem ceeb:
     • Upright Cup Method (Desiccant Method): eg, ASTM E96 BW. Lub desiccant muab tso rau hauv ib lub khob, kaw nrog zaj duab xis, thiab cov dej vapor absorbed nyob rau hauv ib qho kev ntsuas kub thiab av noo. Cov txiaj ntsig tau ze dua rau qhov kev hnav tiag tiag.
     • Inverted Cup Method (Dej Method): Piv txwv li, ISO 15496. Dej yog muab tso rau hauv lub khob, uas yog inverted thiab kaw nrog zaj duab xis, thiab cov dej vapor evaporating los ntawm zaj duab xis yog ntsuas. Txoj kev no yog sai dua thiab feem ntau siv rau kev tswj kom zoo.

2. Txoj Cai Ua Haujlwm

Waterproof thiab noo-permeable zog ntawmTPU zaj duab xistsis ua tiav los ntawm lub cev qhov pores tab sis vam khom rau qib molecular-theem ntawm nws cov saw hydrophilic ntu:

• Waterproof: Zaj duab xis nws tus kheej yog ntom thiab pore-dawb; Cov dej ua kua tsis tuaj yeem dhau los ntawm nws qhov nro thiab cov yeeb yaj kiab molecular qauv.
• Moisture Permeable: Cov polymer muaj cov pab pawg hydrophilic (piv txwv li, -NHCOO-). Cov pab pawg no "catch" dej vapor molecules evaporating ntawm daim tawv nqaij nyob rau hauv. Tom qab ntawd, dhau ntawm "segment txav" ntawm cov saw hlau polymer, cov dej molecules yog cov kauj ruam los ntawm theem "hloov" los ntawm sab hauv mus rau sab nraud.

3. Cov txheej txheem kuaj

1. Hydrostatic Pressure Tester: Siv los ntsuas qhov ntsuas dej tsis zoo ntawm cov yeeb yaj kiab lossis ntaub.
2. Moisture Permeability Cup: Siv nyob rau hauv qhov ntsuas kub thiab cov av noo tas li los ntsuas cov dej noo vapor kis tus nqi (MVTR) siv txoj hau kev ntawm lub khob upright lossis inverted.

4. Cov ntawv thov

Siv cov khoom no,TPU zaj duab xisyog qhov kev xaiv zoo tshaj plaws rau ntau daim ntawv thov high-end:

• Cov Khaub Ncaws Sab Nraud: Cov khoom tseem ceeb hauv cov tsho tawv tawv, hnav caij ski, thiab hiking ris, kom ntseeg tau tias qhuav thiab kev nplij siab rau cov neeg nyiam sab nraum zoov thaum cua thiab los nag.
• Kev Tiv Thaiv Kev Kho Mob: Siv rau hauv cov khaub ncaws phais thiab cov khaub ncaws tiv thaiv los thaiv cov ntshav thiab cov kua hauv lub cev (waterproof) thaum tso cai rau cov hws tawm los ntawm cov neeg ua haujlwm kho mob kom dim, txo kev kub ntxhov.
• Kev Tiv Thaiv Hluav Taws Xob thiab Kev Ua Tub Rog Tub Rog: Muab kev tiv thaiv nyob rau hauv ib puag ncig huab cua, xav tau kev tiv thaiv hluav taws, dej, thiab tshuaj lom neeg, ua ke nrog kev ua pa siab kom muaj kev txav mus los thiab kev ua haujlwm.
• Cov Khoom Siv Khaub Ncaws: Siv los ua cov thom khwm tsis muaj dej (booties) kom cov ko taw qhuav hauv cov dej nag thaum tiv thaiv sab hauv tshav kub thiab noo noo.

Hauv cov ntsiab lus, los ntawm nws cov qauv tshwj xeeb ntawm lub cev thiab tshuaj lom neeg, TPU zaj duab xis txawj sib npaug ntawm qhov kev xav tau ntawm "waterproof" thiab " breathable," ua rau nws yog ib qho tseem ceeb ntawm cov khoom siv tseem ceeb hauv kev ua haujlwm siab textiles.