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US 9,068,042 B2Granted
Transparent films
AssigneeDsm IP Assets B.V.
InventorsAlexander Antonius Maria Stroeks, Rudy Rulkens, Lee Sanghoon, Sidiki Tamim Peter
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AssigneeDsm IP Assets B.V.
InventorsAlexander Antonius Maria Stroeks, Rudy Rulkens, Lee Sanghoon, Sidiki Tamim Peter
Estimating the term…
The invention relates to an optically transparent polymer film or extrudate product made of a polymer composition comprising a semi-crystalline polyamide having a melting temperature of at least 270° C. or a blend of the semi-crystalline polyamide (A) and a second polymer (B), and optionally at least one additive, wherein the semi-crystalline polyamide (A) is present in an amount of more than 50 wt. %, relative to the total weight of the polymer composition, the polymer composition in the optically transparent polymer film or extrudate product has a melting temperature (Tm-C) in the range of 270-340° C., and wherein the film or a part of the extrudate product has a haze of less than 12% and a light transmittance, of at least 88% measured with the method according to ASTM D1003A.
An optically transparent extrudate product made of a polymer composition comprising at least 60 wt. %, relative to total weight of the polymer composition, of a semi-crystalline polyamide (A) having a melting temperature TmA of at least 270° C., wherein the semi-crystalline polyamide (A) is a semi-crystalline semi-aromatic polyamide or a blend thereof with a semi-crystalline aliphatic polyamide, and wherein the polymer composition has a melting temperature TmC of at least 270° C., and the extrudate product has a haze of less than 12% and a light transmittance of at least 88%, measured with the method according to ASTM D1003A.
Dependencies are inferred from the claim text.