| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet-like foam which excels in soft feeling, in which cushioning property and buffer nature are large, and to provide a method of manufacturing the same and applications thereof (cushioning material, buffer material or the like). SOLUTION: The extrusion foaming of an expandable resin composition containing a soft thermoplastic resin is carried out, and a foam 1 having a closed cell structure is formed, a large number of needles 4 shorter than the thickness of the foam are made to invade into the thickness direction of the foam 1, and the closed cells are made to be an open cell, and a foam in which a first bubble phase 5 of an open cell structure is formed in one surface side and a second bubble phase 6 of a closed cell structure is formed in the another surface side is manufactured. The foam has a single layer structure, has a cell structure in the whole thereof, and is suitable as a cushioning material of vegetables and fruits or the like. COPYRIGHT: (C)2012,JPO&INPIT |
