Gasket raw material

A technology of gaskets and fillers, applied in the fields of gasket materials, engines and transmissions, to achieve the effect of avoiding wear

Inactive Publication Date: 2005-09-07
NIPPON LEAKLESS IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the solution of solid lubricant, such as graphite powder, or molybdenum disulfide powder is applied to the surface layer to make a low friction coating 2 of solid lubricant, which has the problem that an galvanic corrosion site EC will Via the gasket, arising from, relative to the box H and the lid C or the material gasket insert of such a sealing substance

Method used

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  • Gasket raw material
  • Gasket raw material
  • Gasket raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] The bonding seat 1 of the first embodiment is formed by the following process. First, a one-component material is manufactured by mixing rubber (for example, nitrile butadiene rubber (NBR)), micronized reinforcing fibers (fiber bundles, for example, aramid as an organic fiber) Fiber (aramid fiber)), glass fiber (as an inorganic fiber to replace asbestos), needle-shaped inorganic fillers, and other fillers (such as barium sulfide). Then, the component material is added to a calender roll including a pair of rolls (hot and cold rolls), a calender roll, and a calender roll by mixing and squeezing the rolls to The ingredients that form a sheet are on a hot rolling wheel. The composition is then vulcanized and thermally hardened and cured by using the heat of a hot roller to form a joint seat. Then, the joint seat is formed by separating from the hot rolling wheel. like figure 1 As shown, in this process, the above-mentioned three-layer front surface layer 1a, rear surf...

experiment example 1

[0089] Table 1 below lists the test results of the tensile strength of the splice sockets, wherein samples 1-1 to 1-3 are splice sockets 1 with the same thickness of 0.5 mm and different mixing compositions. The comparative samples 1-1 and 1-2 are similar to the splice base 1 with the same thickness of 0.5 mm, and the composition of each needle-like fiber is 0 wt % and 50 wt %, respectively. These samples were fabricated and tested for tensile strength by a tensile test under the test conditions defined in JIS K 6251. As shown in the results in the table, the tensile strength of both comparative samples 1-1 and 1-2 is lower than 40 MPa. On the other hand, all of the samples 1-1 to 1-3 have a tensile force exceeding 45 MPa, which shows that these samples are gasket materials with a relatively high tensile force.

[0090] Group of Experimental Cases

to make

Composition (wt%)

tensile strength

(MPa)

Aramid fiber

dimension

rubber

...

Embodiment 2

[0094] The bonding base 1 of the second embodiment is formed by the following process. First, a one-component material is manufactured by mixing rubber (such as nitrile rubber (NBR)), reinforcing fibers (fibers used to replace asbestos, such as aramid fibers or glass fibers), and fillers ( For example, barium sulfide) and so on. Then, the component material is fed to a calender roll including a pair of rolls (hot roll and cold roll) to a hot roll by mixing and pressing the rolls to form a thin sheet Ingredients are on hot rolling wheels. The composition is then vulcanized and thermally hardened and cured by using the heat of a hot roller to form a joint seat. Then, the joint seat is formed by separating from the hot rolling wheel. In this process, the above-mentioned three-layer front surface layer 1a, rear surface layer 1b, and intermediate layer 1c of the above-mentioned bonding seat 1 are mainly formed by changing the composition of reinforcing fibers (for more details a...

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Abstract

The gasket material that is manufactured from a joint seat which includes three layers, that is, a front surface layer (1a), a back surface layer (1b) and the middle layer (1c), and these layers have different composition of reinforced fiber and filler respectively, and this joint seat is made from an ingredient made by mixing and kneading rubber, reinforced fiber and filler, then pressurized laminating and vulcanizing the ingredient, this joint seat is characterized in that the reinforced fiber is as a sort of fibril which is composed from one or both of organic fiber and non-asbestos type inorganic fiber, and at least a part of the filler is spicular inorganic fiber and its composition is 10 wt %-45 wt %. According to this joint seat (1), a crack breakage of the gasket that the ingredient material is the joint seat (1) due to fretting is prevented.

Description

technical field [0001] The present invention relates to a gasket material for use in engines and transmissions of automobiles and automatic propulsion devices, and more particularly to a gasket material manufactured from a joint seat, A component for making the joint seat is obtained by mixing and kneading a rubber, a reinforcing fiber and a filler, then pressurizing into sheets, and adding sulfur and heat to harden the component. The invention also relates to a gasket manufactured from such gasket material. Background technique [0002] Hitherto, so-called asbestos joints have been often used as materials for gaskets around engines loaded on automatic propulsion equipment and the like. This joint seat is manufactured by combining asbestos with nitrile rubber and phenolic resin, and forms a thin sheet material. [0003] However, in recent years, due to the influence of the surrounding environment, the control of this asbestos joint seat has become quite complicated, so the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/02C08K7/04C09K3/10F16J15/10
CPCF16J15/104C08K7/04C09K3/1028B32B25/02F16J15/102C08L21/00B32B2605/08B32B2305/30B32B2305/08B32B25/04
Inventor 滨田义明秋吉浩二村上康则田畑胜宗
Owner NIPPON LEAKLESS IND CO LTD
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