Archem Inc.

Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Yukiko Yamaguchi

Yoshiyuki Takahashi

Taisuke Yonezawa

Taichi Itabashi

Satoshi Ienaga

Toshimitsu Shinohara

Tetsuya Yamada

Tatsuo Yokoi

Kazuya Ootsuka

Nobuyuki Azakami

A porous structural bodymade of flexible resin or rubber, the porous structural body includes a skeleton partthroughout its entirety. The skeleton part includes a plurality of bone partsB and a plurality of coupling partsJ coupling end parts of the plurality of respective bone parts with each other. The skeleton part has a plurality of annular partseach constituted of the plurality of bone parts and the plurality of coupling parts into an annular shape. Each annular part zones a virtual surface Vby its inner peripheral side edge part. At least a part of each of one or a plurality of the virtual surfaces is covered with one or a plurality of partially connected films. Each of the one or plurality of partially connected films is connected to only a part of the annular part in a peripheral direction.

Porous structural body and porous structural body manufacturing method

A porous structural bodyis a porous structural body made of flexible resin or rubber, the porous structural body including a skeleton partthroughout an entirety thereof, wherein the skeleton part includes: a plurality of bone partsB; and a plurality of connection partsJ that connect end portions of the plurality of bone parts, and wherein the porous structural body is configured such that a plurality of portions of the skeleton part interfere with each other when the porous structural body is compressed to deform in a predetermined weight input direction.

Porous structure and method for manufacturing porous structure

A cushion material with improved vibration absorptivity, and a cushion material manufacturing method for easily obtaining the cushion material are provided. The cushion material () includes a foam body () having a surface portion () formed of an air permeability control surface portion () and an air permeability uncontrol surface portion (), and a covering material () configured to cover the air permeability uncontrol surface portion (). The cushion material manufacturing method is a cushion material manufacturing method for obtaining the cushion material (), and includes covering the air permeability uncontrol surface portion () of the foam body () with the covering material ().

Cushion material and cushion material manufacturing method

A passenger-seat-cushion-member manufacturing method including a step of shaping the porous structural body by using a 3D printer; and a step of coupling the filling body side coupling part including the shaped porous structural body to the seat body side coupling part, to fill the seat body with the filling body.

Passenger-seat-cushion-member manufacturing method, passenger-seat cushion member, filling-body manufacturing method, and filling body

A seat pad with improved thermal comfort and improved vibration absorptivity and a seat pad manufacturing method for easily obtaining the seat pad are provided. In the seat pad (), when a surface portion () up to 10 mm from a surface () is cut out and the air permeability ARof the surface portion () is measured in compliance with JIS K 6400, the air permeability ARis more than 5 cc/cm/sec and 25 cc/cm/sec or less. The seat pad manufacturing method is a seat pad manufacturing method for obtaining the seat pad () by supplying a molding material into a molding die and performing foam molding. As the molding die, a molding die an inner surface of which is covered with polystyrene or polyethylene is used.

Seat pad and seat pad manufacturing method

A seat pad manufacturing method is provided. The method includes disposing a sheet member inside a foaming mold for shaping a seat pad, then injecting a foaming resin material into the foaming mold and foaming a resin foamed body through mold clamping, and demolding the resin foamed body in a state in which the sheet member is buried in the resin foamed body. Both end parts of the sheet member in the right-left direction and both end parts of the sheet member in the extending direction are each temporarily fastened to the surface of the mold through a fastener. The foaming resin material is injected into a space between the mold surface and the sheet member. A central part of the sheet member deforms into a shape curved in a convex shape as the sheet member is pressed upward through expansion of the foaming resin material.

Seat pad manufacturing method

A seat padis a seat pad including a resin foamed bodyand a sheet memberburied in the resin foamed body, and when a direction orthogonal to a right-left direction and a thickness direction of the seat pad is referred to as an extending direction of the seat pad, at least a central part of the sheet member is curved in a convex shape on a back surface side of the seat pad in the extending direction.

Provided is a cushion pad, in which a seating body portion of a seating portion has a bottomless or bottomed first hole arranged at a position at which the first hole overlaps a pair of ischial bones of a seated person in a horizontal projection plane and three or more bottomless or bottomed second holes with areas that are smaller than an area of the first hole in a horizontal projection plane, a center point Oof the first hole is on or inside a triangle TR obtained by connecting center points of any three second holes from among the three or more second holes in the horizontal projection plane and in the seating portion, the inside of the first hole is a void space, or a soft material portion is arranged inside the first hole.

Cushion pad

In a vehicle seat pad, a seating portion has a plurality of bottomless or bottomed holes, and in a horizontal projection plane, a ratio RU of a total area of under-femoral-region holes in an upper surface of a femoral region-placed portion with respect to an entire area of the femoral region-placed portion, a ratio RCU of a total area of under-hip holes in an upper surface of an under-hip center portion with respect to an entire area of the under-hip center portion, and a ratio RSU of a total area of under-hip holes in upper surfaces of a pair of under-hip side portions with respect to entire areas of the pair of under-hip side portions satisfy RU&#x3e;RCU&#x3e;RSU.

Vehicle seat pad

This hot rolled steel contains, in terms of mass %, C: 0.01 to 0.1%, Si: 0.01 to 0.1%, Mn: 0.1 to 3%, P: not more than 0.1%, S: not more than 0.03%, Al: 0.001 to 1%, N: not more than 0.01%, Nb: 0.005 to 0.08%, and Ti: 0.001 to 0.2%, with a remainder being iron and unavoidable impurities, wherein a formula: [Nb]&#xd7;[C]&#x2266;4.34&#xd7;10is satisfied, a grain boundary density of solid solution C is not less than 1 atom/nmand not more than 4.5 atoms/nm, and a grain size of cementite grains precipitated at grain boundaries within the steel sheet is not more than 1 &#x3bc;m.

High-strength hot rolled steel sheet being free from peeling and excellent in surface properties and burring properties, and method for manufacturing the same

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Tokyo, Japan

Yukiko Yamaguchi