Cushion materials and method of making same
AssigneeIkeda Bussan Co., Ltd.
InventorsHisashi Ikeda, Yuuichi Hosoda
Life of this patent
Estimating the term…
Abstract
A cushion material and method of making the same, in which a soft polyurethane foam is cut into a slab in a predetermined form; applied to or injected into this polyurethane foam slab at a predetermined portion thereof a bonding agent or forming keeping binder which has a property to be solidified in reaction under certain conditions; said slab is shaped as compressed in a pair of forming dies into a predetermined cubic form, or integrally bonded on a cushion layer constituted by said slab of polyurethane foam another cushion layer made of polyurethane foam chips shaped in a predetermined cubic form by chopping or comminuting soft polyurethane foam scrap into chips, applying a bonding agent to them, and compressing them in a pair of forming dies.
Claims24
A cushion material, comprising:
- a plurality of cushion layers formed with a plurality of polyurethane foam slabs in piles cut in a predetermined form,
- form keeping layer means made of bonding agent applied between said plurality of polyurethane foam slabs with its amount partially increased or decreased at a predetermined portion between said polyurethane foam slabs to be solidified in a predetermined cubic form pressure, maintaining said cushion layers in a predetermined cubic form, the surface having a feel of soft polyurethane foam.
A cushion material, comprising:
- a first cushion layer obtained by shaping into a predetermined cubic form a polyurethane foam made of a soft polyurethane foam slab cut into a predetermined form;
- a second cushion layer placed upon and integrally bonded with said first cushion layer to be covered by said first cushion layer,
- said second cushion layer obtained by bonding together with a bonding agent, polyurethane foam chips produced by chopping or comminuting soft polyurethane foam scrap, followed by shaping into a predetermined cubic form;
- and
- form keeping layer means made of bonding agent applied between said first and second cushion layers with its amount partially increased or decreased at a predetermined portion between said polyurethane foam slabs to be solidified in a predetermined cubic form after pressure, maintaining said cushion layers in a predetermined form, the surface having a feel of soft polyurethane foam.
Dependencies are inferred from the claim text.