Patent ID: 9028938
Filing Date: 2015-05-12
Classification: B65D,C08J,C08L,Y10T

Abstract:
1. A sheet for use in electronic component packaging, comprising (A) 29 to 65 parts by mass of a styrene-conjugated diene block copolymer comprising at least one styrene block and at least one conjugated diene block; (B) 51 to 15 parts by mass of a polystyrene resin; and (C) 20 to 9 parts by mass of a high-impact polystyrene resin comprising graft rubber particles; wherein the components (A) to (C) have weight-average molecular weights (Mw) in the following ranges: component (A): Mw=140,000 to 220,000; component (B): Mw=200,000 to 400,000; component (C): Mw=150,000 to 190,000, wherein the average particle size of the graft rubber particles in component (C) is 2.0 to 3.0 μm, and the proportion of the graft rubber particles in the sheet is 0.75 to 1.90 mass %, the sheet being 100 mass %.