Membranes of polyurethane based materials including polyester polyols

   
   

The present invention relates to membranes including an urethane including a polyester polyol, wherein the membrane has a gas transmission rate of 15.0 or less for nitrogen gas wherein the membrane has an average thickness of approximately 20.0 mils. Under certain embodiments, the membranes include blends of one or more polyester polyol based thermoplastic urethanes and one or more barrier materials. The membranes can be employed in a variety of applications and can be used as either monolayers or multi-layered laminates.

La presente invenzione riguarda le membrane compreso un uretano compreso un polyol del poliestere, in cui la membrana ha un tasso della trasmissione del gas di 15.0 o di meno per il gas dell'azoto in cui la membrana ha uno spessore medio di circa 20.0 mil. Sotto determinati incorporamenti, le membrane includono le miscele di uno o più uretani termoplastici basati polyol del poliestere e di uno o più materiali della barriera. Le membrane possono essere impiegate in una varietà di applicazioni e possono essere usate come o strati monomolecolari o multi-layered lamina.

 
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