Method for producing polypropylene material, and polypropylene material
AssigneeSekisui Chemical Co., Ltd.
InventorsAkira Nakasuga, Hironori Tabata
Life of this patent
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Abstract
Provided is a method for producing a polypropylene material, which can improve the heat resistance of the polypropylene material. The method for producing a polypropylene material comprises: a melting step of melting a polypropylene material rolled in at least one direction, at a temperature that is higher than Tm+5° C. where Tm is a melting peak temperature of the polypropylene material not rolled yet as measured by differential scanning calorimetry, and is equal to or lower than Tm+60° C.; and a heat treatment step of heat-treating the polypropylene material melted in the melting step, at a temperature that is equal to or higher than Tm−20° C., and is lower than Tm−10° C.
Claims7
A method for producing a polypropylene material comprising:
- a melting step of melting a polypropylene material rolled in at least one direction, at a temperature that is higher than Tm+5° C. and is equal to or lower than Tm+60° C., where Tm is a melting peak temperature of the polypropylene material not rolled yet as measured by differential scanning calorimetry;
- and
- a heat treatment step of heat-treating the polypropylene material melted in the melting step, at a temperature that is equal to or higher than Tm−20° C., and is lower than Tm−10° C.
Dependencies are inferred from the claim text.