FOAM NET OF NONCROSSLINKED POLYPROPYLENE RESIN FOR MOLDING AND NET TRAY OF NONCROSSLINKED POLYPROPYLENE RESIN FOAM

摘要

PROBLEM TO BE SOLVED: To perfect shock-absorbing characteristics for wrapping and thereby improve the visual recognizability and water draining properties of a content by specifying the ratio of opening of a net, the average density of fine filaments constituting the net and the average cross section of the perpendicular section of the net. SOLUTION: This foam net 1 consists of clusters 21 of fine filaments 2 of noncrosslinked polypropylene resin foam arranged in parallel at a specified internal between the fine filaments 2. Numerous fine filaments 2 are likewise arranged side by side at a specified interval between the fine filaments 2 to form clusters 22 of fine filaments. The ratio of opening formed between the fine filaments 2 of the net 1 is 10-60%. The ratio of opening represents the area ratio of the total open hole part 3 which is present within a specified range for the total area in a specified range, as viewed from a perpendicular direction with a sheet face of a sheet-like net 1. In addition, the average density of the fine filaments 2 constituting the net 1 is 0.022-0.10g/cm<3> , and the average cross section of the perpendicular section of the fine filaments 2 constituting the net 1 is 7-180mm<2> .