Soft polyurethane foam molded article and seat pad

Patent metadata

Field	Value
Publication number	US-10870377-B2
Application number	US-201515316988-A
Country	US
Kind code	B2
Filing date	Jun 4, 2015
Priority date	Jun 12, 2014
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

The present invention provides a soft polyurethane foam molded atticle which has a mounting surface (1A) can be obtained by foaming and molding a raw foaming liquid, and has a constitution which a ratio of a diameter of a foaming cell in the horizontal direction X along the mounting surface (1A) to a diameter of the foaming cell in the vertical direction Y orthogonal to the mounting surface (1A) increases toward the mounting surface (1A) in the vertical direction (Y).

First claim

What is claimed is:

1. A soft polyurethane foam molded article which has a mounting surface and can be obtained by foaming and molding a raw foaming liquid,
wherein a ratio of a diameter of a foaming cell in the horizontal direction along the mounting surface to a diameter of the foaming cell in the vertical direction orthogonal to the mounting surface increases toward the mounting surface in the vertical direction,
a hardness of the soft polyurethane foam in a thickness direction from the mounting surface toward a rear surface opposite to the mounting surface continuously increases such that shapes of foaming cells gradually change from a horizontally long shape to a substantially round shape,
increase percentages of the ratios in the vertical direction toward the mounting surface are identical to each other when the ratio is measured at four points in the soft polyurethane foam, the four points being set by equally dividing the soft polyurethane foam in the vertical direction, and
the ratio of a region in a central portion in the vertical direction of the soft polyurethane foam between the mounting surface and the rear surface is smaller than the ratio of a region in a mounting surface side of the soft polyurethane foam and is greater than the ratio of a region in a rear surface side of the polyurethane foam.

2. The soft polyurethane foam molded article according to claim 1 , wherein the raw foaming liquid is made of one urethane foaming material.

3. The soft polyurethane foam molded article according to claim 1 ,
wherein the ratio of a diameter of a foaming cell in the horizontal direction along the mounting surface to a diameter of the foaming cell in the vertical direction orthogonal to the mounting surface included on a rear surface side opposite to the mounting surface side is 0.95 to 1.05.

4. The soft polyurethane foam molded article according to claim 1 ,
wherein the ratio of a diameter of a foaming cell in the horizontal direction along the mounting surface to a diameter of the foaming cell in the vertical direction orthogonal to the mounting surface included on the mounting surface side is 1.40 to 1.60.

5. A seat pad,
wherein the seat pad is installed in automobiles and used as a seating portion and is the soft polyurethane foam molded article according to claim 1 .

6. The soft polyurethane foam molded article according to claim 1 , wherein raw foaming liquid is made of one liquid which is one blended.

Assignees

• Bridgestone Corp

Inventors

• Shinohara Toshimitsu
• Yoshitomi Kosuke

Classifications

• B60N2/70 Primary

  Upholstery springs {; Upholstery} · CPC title

• C08G18/00

  Polymeric products of isocyanates or isothiocyanates · CPC title

• C08G2110/0083

  prepared using water as the sole blowing agent · CPC title

• C08G2110/0008

  flexible · CPC title

• B29C39/00

  Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor (B29C41/00 takes precedence) · CPC title