Vehicle seat core and seat pad
AssigneeSekisui Plastics Co., Ltd.
InventorAtsushi Fukuta
Life of this patent
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Abstract
The present invention provides means for improving bondability between a vehicle seat core and a cushion in a vehicle seat pad formed by integration of them without significantly impairing mechanical properties. A vehicle seat core is characterized in that it is a vehicle seat core for forming a vehicle seat pad by integration with a cushion, which comprises a foamed resin molded body obtained by filling a cavity of a mold with a plurality of foamed resin particles and performing in-mold foam molding, and that at least a partial region of a surface of the foamed resin molded body to which the cushion is bonded when forming the vehicle seat pad has a surface expansion rate of 40% to 85%, and the foamed resin molded body has a first fusion rate of 95% or more or a second fusion rate of 60% or more.
Claims16
A vehicle seat core for forming a vehicle seat pad by integration with a cushion, comprising
- a foamed resin molded body obtained by filling a cavity of a mold with a plurality of foamed resin particles and performing in-mold foam molding,
- wherein at least a partial region of a surface of the foamed resin molded body to which the cushion is bonded when forming the vehicle seat pad has a surface expansion rate of 40% to 85%, the surface expansion rate being a proportion of an area of a surface on a virtual plane corresponding to the mold of the foamed resin molded body with respect to an area of the virtual plane within the region, and
- wherein the foamed resin molded body has a first fusion rate of 95% or more, the first fusion rate being a proportion of an area of foamed resin particles that appear on a cross-section obtained when cutting the foamed resin molded body with respect to an area of the cross-section.
A vehicle seat core for forming a vehicle seat pad by integration with a cushion, comprising
- a foamed resin molded body obtained by filling a cavity of a mold with a plurality of foamed resin particles and performing in-mold foam molding,
- wherein at least a partial region of a surface of the foamed resin molded body to which the cushion is bonded when forming the vehicle seat pad has a surface expansion rate of 40% to 85%, the surface expansion rate being a proportion of an area of a surface on a virtual plane corresponding to the mold of the foamed resin molded body with respect to an area of the virtual plane within the region, and
- wherein the foamed resin molded body has a second fusion rate of 60% or more, the second fusion rate being a proportion of the number of foamed resin particles each having a fracture inside thereof with respect to the total number of foamed resin particles that appear on a fracture surface when dividing the foamed resin molded body.
Dependencies are inferred from the claim text.