Abstract: An elastic permeable material and method of making same involves a board-like basic structure made of a foam material having therein close cells. The basic structure is provided with a plurality of recesses which are filled with an emulsified foam body having therein open cells. The basic structure is subjected to a heating and then a curing before the top and the bottom layers of the basic structure are peeled off so that the recesses become through holes. The basic structure is used as a main framework while the foam bodies embedded in the through holes form a permeable framework. The elastic permeable material is provided thereon a permeable outer covering adhered thereto. The basic structure is heated under a pressure so as to bring about a reduction in the thickness of the basic structure, thereby resulting in a formation of corrugated surface of the elastic permeable material.

Abstract: An elastic permeable material and method of making same involves a board-like basic structure made of a foam material having therein close cells. The basic structure is provided with a plurality of recesses which are filled with an emulsified foam body having therein open cells. The basic structure is subjected to a heating and then a curing before the top and the bottom layers of the basic structure are peeled off so that the recesses become through holes. The basic structure is used as a main framework while the foam bodies embedded in the through holes form a permeable framework. The elastic permeable material is provided thereon a permeable outer covering adhered thereto. The basic structure is heated under a pressure so as to bring about a reduction in the thickness of the basic structure, thereby resulting in a formation of corrugated surface of the elastic permeable material.

Abstract: A rigid PVC foam material is made from a compound containing ingredients, such as polyvinyl chloride or vinyl chloroacetate copolymer, which is mixed with 5-50 parts by weight of ethylene vinyl acetate copolymer or ionized polyethylene resin or chloro sulfo polyethylene resin, 5-50 parts by weight of acrylobutadiene rubber or acrylic butadiene-styrene rubber or isoprene or natural rubber, 1-5 parts by weight of a stabilizer, 1-30 parts by weight of a chemical foaming agent, 0.2-5 parts by weight of a bridging agent, and 1-5 parts by weight of an extrusion-aiding agent. The mixture is extruded by a rolling machine at a temperature in a range of 100-150 degrees in Celsius and is subsequently transferred to a molding tool in which it is heated under a pressure and a temperature in a range of 120-170 degrees in Celsius for 10-60 minutes so as to bring about a foaming and bridging reaction.

Abstract: A foam body is made integrally of at least a layer of foam material having great resilience and at least a layer of foam material having great capability to absorb shock. The foam material having great capability to absorb shock is made from a first mixture while the foam material having great resilience is made from a second mixture. The first and the second mixtures contain respectively 5-50% by weight of acrylobutadiene rubber, 50-95% by weight of polyvinyl chloride, a plasticizer, a bridging agent, a foaming agent, an extrusion-aiding agent and other additives. The first mixture differs from the second mixture in that the former contains less than 50 parts by weight of the plasticizer and that the latter contains more than 50 parts by weight of the plasticizer. The first and the second mixtures are stacked orderly in a mold cavity in which they are heated under pressure to foam to take shape of the foam body.