Claims
- 1. A fluororesin sheet comprising an aromatic polyamide pulp and a fluororesin as a main component, the tensile strength of the fluororesin sheet being not less than about 250 kg/cm.sup.2.
- 2. A fluororesin sheet according to claim 1, which is obtained by subjecting an aqueous dispersion comprising an aromatic polyamide pulp component and a fluororesin component to paper making.
- 3. A process for producing a fluororesin sheet comprising an aromatic polyamide pulp and a fluororesin as a main component, which process comprises the steps of:
- (a) preparing a dispersion in which the aromatic polyamide pulp and the fluororesin powder are dispersed in water;
- (b) adding a coagulating agent to the dispersion to deposit the fluororesin powder on the surface of the aromatic polyamide pulp;
- (c) subjecting the aromatic polyamide pulp on which the fluororesin has been deposited to a paper making process, followed by drying to obtain a sheet article; and
- (d) compressing the sheet article, followed by heating.
- 4. A process for producing a fluororesin sheet according to claim 3 wherein the aromatic polyamide pulp used in the above step (a) is an aromatic polyamide pulp having a BET specific surface area of from about 3 to about 25 m.sup.2 /g and the fluororesin powder is fluororesin powder having an average particle size of from about 0.01 to about 10 .mu.m.
- 5. A process for producing a fluororesin sheet according to claim 3 or 4, wherein the above step (d) is a step of compressing the sheet article using a roller at a temperature below the melting point of the fluororesin, followed by heating at a temperature above the melting point of the fluororesin.
- 6. A sliding material comprising the fluororesin sheet of claim 1.
- 7. A composite molded material which is a laminate of a composite sheet comprising an aromatic polyamide pulp and a fluororesin as the main components, the composite molded material having a tensile strength of not less than about 250 kgf/cm.sup.2.
- 8. A process for producing a composite molded material according to claim 7, comprising the steps of
- (a) preparing a dispersion in which the aromatic polyamide pulp and the fluororesin powder are dispersed in water;
- (b) adding a coagulating agent to the dispersion to deposit the fluororesin powder on the surface of the aromatic polyamide pulp;
- (c) subjecting the aromatic polyamide pulp on which the fluororesin has been deposited to a paper making process, followed by drying to obtain a sheet material; and
- (d) laminating a plurality of the sheet-like materials, followed by heating.
- 9. A process according to claim 8, wherein the aromatic polyamide pulp used in the above step (a) is an aromatic polyamide pulp having a BET specific surface area of from about 3 to about 25 m.sup.2 /g and the fluororesin powder is fluororesin powder having an average particle size of from about 0.01 to about 10 .mu.m.
- 10. A process according to claim 8, wherein step (d) is conducted by first cutting a plurality of sheet into pieces having a predetermined shape, and then laminating and further compressing to prepare a preform which thereafter is heated.
- 11. A sliding material comprising a composite molded material according to claim 7.
Priority Claims (1)
Number |
Date |
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Kind |
7-198350 |
Aug 1995 |
JPX |
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Parent Case Info
The present application is a Continuation of International Application No. PCT/EP96/03496 filed Aug. 5, 1996.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
32744 |
Jul 1981 |
EPX |
Continuations (1)
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Number |
Date |
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Parent |
PCTEP9603496 |
Aug 1996 |
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