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US 7,732,355 B2Granted
Water-vapor permeable films and textiles
AssigneeIndustrial Technology Research Institute
InventorsDan-Cheng Kong, Lien Tai Chen, Ruei-Shin Chen
Life of this patent
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Abstract
A water-vapor permeable film. The film includes 90˜99 wt % polyurethane (PU) and 1˜10 wt % polyethylene (PE). The invention also provides a textile including the film.
Claims22
A water-vapor permeable film comprising:
- 90-99 wt % thermoplastic polyurethane (TPU) comprising hard segment and soft segment with a ratio of about 0.5-0.8 there between, and
- 1-10 wt % high density polyethylene (HDPE) of density of about 0.941-0.970 g/cm3;
- wherein the hard segment of the thermoplastic polyurethane (TPU) comprises aromatic polyisocyanate comprising 4,4-methylene bisphenyl diisocyanate (MDI) or toluene diisocyanate (TDI) and the soft segment of the thermoplastic polyurethane (TPU) comprises polyether-polyol comprising polyethylene glycol (PEG), polypropylene glycol (PPG), or polytetramethylene glycol (PTMG).
Dependencies are inferred from the claim text.