Title:
SHOCK-ABSORBING MEMBER AND VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/244698
Kind Code:
A1
Abstract:
This shock-absorbing member comprises a molded part containing a thermoplastic resin. The molded part is provided with a main body having a honeycomb structure filled with a plurality of tubular cells. All or some of the tubular cells constituting the honeycomb structure are arrayed with cell walls interposed therebetween, the cell walls having a thickness gradient that satisfies the relationship of expression (G) and that is found by the following "method of calculating the cell wall thickness gradient." [Method of calculating the cell wall thickness gradient] Procedure 1: set a central axis (a), which passes through one end-surface center of gravity and another end-surface center of gravity in a first tubular cell that has a height (H). Procedure 2: set any two surfaces (b) and (c) perpendicular to the central axis (a) within the range of the height (H) of the first tubular cell, and let the distance between the two surfaces (b) and (c) be h (units: mm; 0 < h < H). Procedure 3: let the thickness of the cell wall between the first tubular cell and a second tubular cell adjacent thereto be (t1) (units: mm) at a location where the cell wall and the surface (b) cross. Procedure 4: let the thickness of the cell wall between the first tubular cell and the second tubular cell adjacent thereto be (t2) (units: mm) at a location where the cell wall and the surface (c) cross. Procedure 5: calculate (|t2-t1|/h) as the cell wall thickness gradient.
Inventors:
SUGIYAMA TAKAYUKI (JP)
TAMURA TASUKU (JP)
TAMURA TASUKU (JP)
Application Number:
PCT/JP2022/020212
Publication Date:
November 24, 2022
Filing Date:
May 13, 2022
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
B29C45/00; B32B3/12; B32B27/20; B32B27/36; B60R19/24; B60R19/34; B62D25/08; C08K7/02; C08L67/00; C08L67/03; C08L101/00; F16F7/00; F16F7/12
Domestic Patent References:
| WO2013080974A1 | 2013-06-06 |
Foreign References:
| US20170072884A1 | 2017-03-16 | |||
| JPH1113806A | 1999-01-22 | |||
| JPH0254754U | 1990-04-20 | |||
| US20110316307A1 | 2011-12-29 | |||
| JP2000274472A | 2000-10-03 | |||
| JPH0948301A | 1997-02-18 | |||
| JP2021084347A | 2021-06-03 | |||
| JP2021214975A | ||||
| JP2015519233A | 2013-07-05 |
Other References:
"Liquid Crystal Polymers - Synthesis, Molding, and Applications", 5 June 1987, CMC PUBLISHING CO., LTD., pages: 95
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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