THERMOPLASTIC RESIN FOAMED SHEET, LAMINATED FOAMED SHEET, AND PRODUCTION METHOD OF LAMINATED FOAMED SHEET

摘要

PROBLEM TO BE SOLVED: To provide a thermoplastic resin foamed sheet and laminated foamed sheet usable as speaker member material that has good sound quality, is easy to be light weighted and thinned, and is inexpensive in cost; and a production method of laminated foamed sheet.;SOLUTION: Provided is a thermoplastic resin foamed sheet having cells and in which the thickness is 0.10 to 1.00 mm, the apparent density is 0.30 to 1.50 g/cm³, and in which, assuming a void of 10 μm or more in thickness direction of the sheet to be a cell, the ratio, (VD/MD), of the average cell diameter in thickness direction at the cross section obtained by cutting in thickness direction across the sheet extrusion direction (VD) to the average cell diameter in extrusion direction at said cross section (MD) is less than 0.20.;COPYRIGHT: (C)2016,JPO&INPIT