Cushioning material and process for preparing the same
OwnerSadaaki Takagiinventor
Life of this patent
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Abstract
A cushioning material composed of a drafted three-diamentionally crimped filament mass of a synthetic fiber by bonding contact points between each of the filament with an adhesive, wherein the filament crimped in various shapes formed by partially expanding and compressing the filament crimps at required specific portions in the cushioning material with directionality in required specific directions are distributed with partially increased density in the degree of entanglement.
Claims34
A reinforced cushioning material comprising a compression molded body of drafted three-dimentionally crimped filament mass of a synthetic fiber in which the crimped filaments are of staple length and randomly-oriented and the contact points between each of the filaments are bonded with an adhesive, said body having isolated zones in which the crimped filament is further crimped in situ into various shapes formed by partially expanding and compressing the filament crimps in said zones, and said zones being distributed throughout the reinforced portion of said body, being oriented in the same direction, and having increased density in the degree of entanglement and the number of contact points.
A process for the production of a cushioning material and increasing the load strength thereof, which comprises the steps of molding a mass of randomly-oriented, staple, drafted three-dimensionally crimped filament mass of a synthetic fiber into a predetermined configuration, sticking the molded body thus obtained at specific zones oriented in the direction along which the load strength is to be increased for a predetermined number of times by needles having at least one barb at their tips and arranged at a predetermined needle density, whereby said crimped filament mass in said zones has an increased density in the degree of entanglement and the number of contact points, and then bonding the contact points between each of the crimped filament constituting the above molded body by an adhesive.
Dependencies are inferred from the claim text.