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Steel-frame jointing sheet series
  Produced by cementing, rolling and antiseize-processing spurt metal-core sheet, two-side complex fiber sheet or graphite paper. According to different surface compound materials of spurt metal-core sheet, there are asbestos steel-frame jointing sheet, asbestos-free steel-frame jointing sheet and graphite steel-frame jointing sheet. The main ingredient of asbestos series is asbestos-mine fiber. Its thermostability and mechanical strength are stronger than organic fiber. The main ingredient in asbestos-free series is aramid fiber and inorganic fiber. The thermostability and mechanical strength are weaker than asbestos but compactness is better than asbestos. And it is a kind of environment-friendly sealing material. The surface main ingredient in graphite series is graphite paper. Its thermostability is 600℃, and it is suitable for high-temperature sealing.
 

Item / Type

Technical indexes

Asbestos

Asbestos-free

Graphite

Thickness

mm

1.0~2.0

1.0~2.0

1.0~2.0

Density

g/cm3

1.7-2.0

1.4-1.8

0.8-1.5

Compressibility

%

8-18

10-20

16-30

Recovery

%

≥45

≥40

≥25

Stress relaxation

%

≤25

≤25

≤30

Liquid-resistant

Immerse 20# oil for 5 hours at RT

Thickness increase %

≤15

≤15

 

Weight increase %

≤35

≤35

≤20

Immerse 75# fuel oil for 5 hours at RT

Thickness increase %

≤15

≤20

 

Weight increase %

≤35

≤35

≤20

Immerse Ethanol: water 1:1 for 5 hours at 130oC

Thickness increase %

≤25

≤25

 

Weight increase %

≤40

≤30

 

Scope of application: cylinder head gasket, exhaust gasket, and chemical pipe, flange, pumps sealing