| 摘要 |
PURPOSE: To obtain a polypropylene foam sheet having a satisfactory deep- drawability. CONSTITUTION: This foam sheet comprises 90-10wt.% polypropylene resin and 10-90wt.% polyethylene resin and satisfies the relation:θ=SX/SY=0.9-1.6 (wherein SX is the longitudinal dimensional change (%) after the sheet is left in an atmosphere of 160 deg.C for 30min and then at normal temp. for 1hr; and SY is the transverse dimensional change (%) after the sheet is treated under the same conditions as above).
|
