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System for detecting deformation of cushion pad and process for producing same

A manufacturing method and technology of cushioning pads, which are applied in the field of deformed systems, can solve problems such as foreign body sensation, decreased detection accuracy, and difficulty in configuring the surface layer of cushioning materials.

Inactive Publication Date: 2017-05-31
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device is also a device that obviously uses a permanent magnet, and it feels like a foreign body, so it is difficult to arrange it on the surface of the cushioning material
In addition, if it is arranged in the inner layer of the buffer, the detection accuracy will also decrease.

Method used

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  • System for detecting deformation of cushion pad and process for producing same
  • System for detecting deformation of cushion pad and process for producing same
  • System for detecting deformation of cushion pad and process for producing same

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0080] Manufacturing example 1 Synthesis of isocyanate-terminated prepolymer A

[0081] 42.6 parts by weight of polyol A (3-methyl-1,5-pentane adipate, OH value 56, functionality 2; manufactured by Kuraray Co., Ltd., P-2010) and 42.6 parts by weight of polyol B (polyester polyol prepared from 3-methyl-1,5-pentanediol, trimethylolpropane and adipic acid, the OH value is 56, and the functionality is 3 ; Kuraray Co., Ltd., F-3010), and dehydration under reduced pressure for 1 hour while stirring. Thereafter, the inside of the reaction container was replaced with nitrogen. Next, 14.8 parts by weight of toluene diisocyanate (manufactured by Mitsui Chemicals Co., Ltd., 2,4 configuration = 80%, Cosmonate T-80) was added to the reaction container, and the temperature in the reaction container was kept at 80° C. for 2 hours. Whereas, isocyanate-terminated prepolymer A (NCO%=3.58%) was synthesized.

Embodiment 1

[0083] In a mixed solution of 43.8 parts by weight of polyol B, 4.8 parts by weight of silicone foam stabilizer (manufactured by Toray Dow Corning Co., Ltd., L5340) and 0.12 parts by weight of lead octoate (manufactured by Toei Chemical Co., Ltd., BTT-24) 81.0 parts by weight of a neodymium-based filler (manufactured by Aichi Steel Works Co., Ltd., MF-15P, with an average particle diameter of 33 μm) was added to prepare a filler dispersion. Air bubbles were mixed into the reaction system by vigorously stirring the filler dispersion for the first time for 5 minutes at a rotational speed of 1000 rpm using a stirring blade. Then, 51.4 parts by weight of the prepolymer A obtained above was added and stirred for the second time for 3 minutes to prepare a magnetic filler-containing urethane composition in which bubbles were dispersed. The above-mentioned bubble-dispersed urethane composition was dropped onto a release-treated polyethylene terephthalate (PET) film having a spacer of ...

Embodiment 2～9 and comparative example 1～2

[0103] The matrix layer was produced using the formulation described in Table 1, and a cushion was produced in the same manner as in Example 1, and JIS-C hardness and the like were measured to evaluate property stability. The results are shown in Table 1. In addition, Comparative Examples 1 and 2 are examples in which the base layer is not a foam, but JIS-C hardness is higher (harder) than the flexible polyurethane foam. Comparative Example 2 is an example in which the JIS-C hardness of the base layer is close to but slightly higher (harder) than the JIS-C hardness of the flexible polyurethane foam.

[0104] Example 9 is an example containing a conductive filler (silver filler). Cut the foamed resin containing conductive filler (conductive resin) obtained above into a size of 5-30 mm, and use an ion sputtering device to vapor-deposit gold on the upper and lower surfaces to prepare an electrode layer. Connect the lead wires to the electrode layer, and stick it to the buffer p...

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Abstract

The purpose of the present invention is to obtain a deformation detection system which includes a cushion pad having improved durability and not giving a feeling that foreign matter lies. The invention provides a system for detecting a deformation of a cushion pad, the system comprising: a cushion pad that is configured of a matrix layer in which an electroconductive or magnetic filler has been dispersed and a foamed flexible polyurethane object in some of which the matrix layer has been disposed; and a detection part that detects an electrical or magnetic change attributable to a deformation of the cushion pad. The system is characterized in that the matrix layer has a lower hardness than the foamed flexible polyurethane object. Also provided is a process for producing the system.

Description

technical field [0001] The present invention relates to a system for detecting deformation of a cushion, and in particular to a system for detecting whether a person is seated on a seat, and a method for manufacturing the same. Background technique [0002] In vehicles such as motor vehicles, a warning system that detects whether a seat belt is worn by a person sitting on a seat and issues a warning when the seat belt is not worn has been put into practical use. This system is generally a system that detects the seating of a person and issues a warning when the seat belt is not worn even if the person is seated. This device combines a seat occupancy sensor that detects whether a person is seated and a device that detects that the seat belt is fastened to the buckle, and uses a device that warns when the seat belt is not fastened to the buckle even if a person is seated. Since the seating sensor must detect every sitting of a person, high durability is required. In addition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/00A47C7/18A47C7/62A47C27/15B29C39/10B29C39/24B60N2/44B29K75/00B29K105/04B29L31/58B60N2/90
CPCB29C39/10B29C39/24G01B7/00B60N2/7017B60N2/002B29C44/00G01B7/24B60N2/90A47C7/18
Inventor 福田武司太田贵启
Owner TOYO TIRE & RUBBER CO LTD
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