Method for producing thermoplastic resin sheet

• US 20050023717A1
• Filed: 07/26/2004
• Published: 02/03/2005
• Est. Priority Date: 07/28/2003
• Status: Abandoned Application

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Watanuki, Yoshihiko
• Application Number:
  US10/898,386
• Publication Number:
  US 20050023717A1
• Time in Patent Office: Days
• US Class Current: 264/148
• CPC Class Codes: B26D 1/565 for thin material, e.g. for sheets, strips or the like
• CPC Class Codes: B29C 2793/0027 Cutting off
• CPC Class Codes: B29C 48/0022 combined with cutting
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/21 the layers being joined at their surfaces

Abstract

A thermoplastic resin sheet is produced by the method comprising the steps of heating a thermoplastic resin to be melted; extruding the melted resin through a die continuously into a sheet-like form to obtain a continuous thermoplastic resin sheet with a thickness of about 3 mm or more; and pressing at least one cutting blade against the continuous thermoplastic resin sheet so as to cut the sheet into pieces while transporting the continuous thermoplastic resin sheet in the extrusion direction.

Claims

1. A method for producing a thermoplastic resin sheet, the method comprising the steps of:

heating a thermoplastic resin to be melted;

extruding the melted resin through a die continuously into a sheet-like form to obtain a continuous thermoplastic resin sheet with a thickness of about 3 mm or more; and

pressing at least one cutting blade against the continuous thermoplastic resin sheet so as to cut the sheet into pieces while transporting the continuous thermoplastic resin sheet in the extrusion direction.

2. An apparatus for producing a thermoplastic resin sheet, the apparatus comprising:

a die through which a heat-melted thermoplastic resin is extruded continuously into a sheet-like form to obtain a continuous thermoplastic resin sheet with a thickness of about 3 mm or more;

means for transporting continuous thermoplastic resin sheet in the extrusion direction; and

at least one cutting blade having a structure in which the at least one cutting blade is pressed against the continuous thermoplastic resin sheet to cut the continuous thermoplastic resin sheet while moving in the same direction at the same speed as those of the continuous thermoplastic resin sheet to be transported.