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Gasket material

A gasket and fluororubber technology, which is applied in other chemical processes, transportation and packaging, mechanical equipment, etc., can solve problems such as rubber layer wear, rubber hardness increase, and sealing deterioration

Active Publication Date: 2022-04-08
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of cylinder head gaskets, there is a problem that the rubber layer is worn due to the vibration of the engine
[0003] Wear resistance can be improved by increasing the amount of reinforcing filler, but in this case the hardness of the rubber increases and the sealing performance deteriorates

Method used

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Experimental program
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Embodiment

[0092] Next, the present invention will be described using examples.

[0093] Example

[0094] By coating a Ti / Al primer on a degreased stainless steel plate (thickness 0.2mm), sintering at 200°C for 10 minutes to form a lower primer coating, and coating a cresol novolak-type ring on it. The adhesive mainly composed of oxygen resin is sintered at 200° C. for 5 minutes to form a coating layer.

[0095] On the covering coating layer, a rubber paste coating solution is applied to a coating thickness of about 100 to 200 μm after drying, and is crosslinked at 190° C. for 10 minutes to form a rubber layer. The rubber paste coating solution has the following composition The fluororubber composition obtained by dissolving in methyl isobutyl ketone.

[0096]

[0097] Furthermore, a coating solution (wax and graphite dispersed therein) was applied on the rubber layer, and fired at 200° C. for 5 minutes to form an anti-adhesion layer, thereby producing a gasket material.

[0098] T...

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Abstract

A gasket material, which uses a fluororubber composition on a metal plate to form a fluororubber cross-linked product layer with a microhardness of 5 to 25, and the fluororubber composition contains CTAB ratio per 100 parts by weight of fluororubber. Surface area 3 ~ 34m 2 / g carbon black 30-70 parts by weight and BET specific surface area 35-220m 2 5-15 parts by weight per gram of hydrated amorphous silica, wherein the total amount of the two is 80 parts by weight or less. This rubber-laminated metal plate is formed by forming a cross-linked layer of a fluororubber composition containing carbon black of a specific specific surface area and hydrated amorphous silica ( silica), thereby forming a fluororubber cross-linked layer with a microhardness of 5 to 25, preferably 10 to 20, and a D hardness of 45 to 65, preferably 50 to 60, which can be effectively used as a cylinder head gasket material .

Description

technical field [0001] This invention relates to gasket materials. More specifically, it relates to a gasket material that can be effectively used as a cylinder head gasket or the like. Background technique [0002] The cylinder head gasket is a part that seals between the engine head and the engine block. In the cylinder head gasket, there is a problem that the rubber layer is worn due to vibration of the engine. [0003] The wear resistance can be improved by increasing the compounding amount of the reinforcing filler, but in this case, the hardness of the rubber increases and the sealing performance deteriorates. In order to ensure airtightness, it is desirable that the microhardness (micro-hardness) of the material is 5-25, preferably 10-20. In order to secure such microhardness, it is necessary to set the D hardness of the rubber sheet to 45-65, preferably 50-60. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent La...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/10C08K3/04C08K3/36C08L27/12F16J15/12
CPCC08K3/04C08K3/36F16J15/102F16J15/122C08K2201/006F16J15/0806C09D127/12C09D127/14C08L27/12C08K5/0025C08L2312/00C09K3/1009C09K2200/0208C09K2200/0247C09K2200/0637F16J15/0818
Inventor 武川大起横尾昌大
Owner NOK CORP
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