Patent ID: 8221625

Claim:
A device for filtering a melt of a polyolefin resin composition containing one or two or more polyolefin ingredients, wherein the device comprises: a main body having a flow passage through which the melt is transferred; a sintered metal filter having a filtration accuracy of 1 to 100 μm; a wire netting having a line diameter of 0.01 to 0.25 mm and abutting the sintered metal filter on one side thereof; a supporting member supporting the sintered metal filter and the wire netting, having a thickness of 10 to 100 mm and having a plurality of openings penetrating in the thickness direction with an aperture ratio of 30 to 60%; and a seal member disposed so as to cover the edge of the sintered metal filter; wherein the sintered metal filter, the wire netting and the supporting member are disposed in this order from the upstream to the downstream of the flow passage; and the sintered metal filter is fixed to the main body through the seal member.