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Pressure-sensitive elastomer porous body

A technology of porous body and elastic body, which is applied in the direction of conductors, resistance elements and instruments that use mechanical pressure/force to adjust the resistance value, etc., and can solve problems such as cell damage, poor fixing, and pressure drop on the surface of the nip.

Active Publication Date: 2019-12-06
SYNZTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when the elastic layer composed of foamed silicone rubber foamed by a foaming agent is applied to the above-mentioned fixing roller or pressure roller, etc., it may be due to the difference in the cell diameter (cell diameter) or the wall thickness between the cells. Uniform, due to the stress concentration during compression, the cells are destroyed, the surface pressure of the nip part drops, and there are problems such as poor fixing.

Method used

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Examples

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preparation example Construction

[0066] (Preparation method of pressure-sensitive elastomer porous body)

[0067] Next, a method for producing the pressure-sensitive elastomer porous body according to the embodiment of the present invention will be described. Here, a case where a pressure-sensitive silicone elastomer porous body is prepared using silicone (liquid silicone rubber material) as a liquid rubber material for forming the elastomer constituting the matrix will be described as an example.

[0068] The pressure-sensitive silicone elastomer porous body is prepared by an emulsion manufacturing method capable of suitably preparing an elastomer emulsion (cured product) via a water-in-oil emulsion (emulsion composition) containing each raw material. Here, the emulsion production method refers to the following production method: by fully stirring the raw materials under reduced pressure, or after the stirring of the raw materials, the emulsion is formed under reduced pressure to form an emulsion composition, ...

Embodiment 1

[0100] As the liquid silicone rubber material, conductive liquid silicone rubber (product name: X-34-2777A / B) and non-conductive liquid silicone rubber manufactured by Shin-Etsu Chemical Co., Ltd. were used. These liquid silicone rubbers are supplied in separate packages of active hydrogen-containing polysiloxane and vinyl-containing polysiloxane to which a specified amount of platinum catalyst is added. Hereinafter, the former will be referred to as silicone rubber agent A, and the latter will be referred to as silicone rubber agent B.

[0101] As the conductive liquid silicone rubber, silicone rubber containing carbon black as a conductive agent is used. The blending ratio of the conductive liquid silicone rubber and the non-conductive liquid silicone rubber is, for example, shown in Table 1 below, thereby specifying the blending amount of the conductive agent (carbon black). In addition, as a dispersion stabilizer, a polyether-modified silicone oil manufactured by Shin-Ets...

Embodiment 2、3

[0106] Except for changing the blending ratio of the conductive liquid silicone rubber and the non-conductive liquid silicone rubber as shown in the following Table 1, the same operation as in Example 1 was carried out, and a test of producing a silicone elastomer porous body by the emulsion production method was carried out. piece.

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Abstract

A pressure-sensitive elastomer porous body is a cured product of an elastomer emulsion, which is obtained via an emulsion composition comprising, as a continuous phase, a liquid rubber material whichis cured to form an elastomer, wherein a conductive agent is contained in an amount of 2.7-3.5 wt% with respect to the total amount of the emulsion composition, and the electric resistance value (omega) rises as the compression ratio C (%) increases.

Description

technical field [0001] The present invention relates to a pressure-sensitive elastomeric porous body. Background technique [0002] In an electrophotographic (photograph, photo) image forming apparatus such as a printer or a copier, a fixing roller, a pressure roller, or the like is used in a fixing section for fixing unfixed toner. Such a fixing roller, a pressure roller, and the like are rotationally driven in a high-temperature environment while being pressed to form a nip portion. Therefore, it is known that a porous elastic body or the like is used in the elastic layer of the above-mentioned fixing roller, pressure roller, etc. to reduce the heating energy and reduce the heat capacity. [0003] However, when the elastic layer composed of foamed silicone rubber foamed by a foaming agent is applied to the above-mentioned fixing roller or pressure roller, etc., it may be due to the difference in the cell diameter (cell diameter) or the wall thickness between the cells. U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08K3/01C08L21/00
CPCC08J9/28C08L21/00H01B1/00C08G77/20C08G77/12C08L83/04C08K3/04C08J2383/04C08J2483/04C08J9/0061C08J9/0066C08J2483/12C08J2201/0504C08K2201/001H01C10/10G01L1/20G01L1/205C08L83/00C08K5/56C08J2383/07
Inventor 根本亘
Owner SYNZTEC
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