To provide a manufacturing method for a sheet made of polypropylene resin which can accurately transfer the surface shape of a transfer mold according to the transfer mold and which is superior in transparency.
The manufacturing method for the sheet made of the polypropylene resin includes a melting step of melting and kneading the polypropylene resin, a molding step of molding the melted polypropylene resin in a sheet form by discharging the melted polypropylene resin from a T-die, and a transferring step of cooling and curing the sheet state-melted resin while transferring the transfer mold to the surface of the sheet state-melted polypropylene resin by sandwiching the sheet state-melted polypropylene resin between an elastic roll and a metallic roll equipped with the transfer mold on the surface, in the case that the surface temperature of the metallic roll is 0 to 95°C, the linear load in the case of sandwiching the sheet state-melted polypropylene resin between the elastic roll and the metallic roll is 1-300 N/mm, and the sandwiching distance is 1-30 mm.
ISHIGAMI YOSHITERU
NAKANISHI MAKI
Toru Sakamoto
Next Patent: COMPOSITE SHEET