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US 7,208,026 B2Granted
Heat-resistant filter
AssigneesDainippon Ink and Chemicals, Inc., Toray Industries, Inc.
InventorsTomoaki Ohya, Makoto Nakahara
Life of this patent
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Abstract
To provide a heat resistant filter of which the reduction of tensile strength and folding endurance is small even when used as a filter material for a filter used at high temperatures, failure of the filter material is difficult even when used at high temperatures, and which is capable of achieving a long life. The heat resistant filter contains: a heat resistant organic fiber base material, and a resin composition which contains an alkaline substance and which adheres to the heat resistant organic fiber base material.
Claims18
A heat resistant filter comprising:
- a heat resistant organic fiber base material with the organic fiber content being more than 50 percent;
- and a resin composition which contains an alkaline substance and which adheres to said heat resistant organic fiber base material;
- wherein said resin composition containing an alkaline substance contains at least one resin composition selected from the group consisting of:
- an alkaline phenol resin composition;
- a polyamidoimide resin composition containing an alkaline substance;
- a polyimide resin composition containing an alkaline substance;
- and an aramid resin composition containing an alkaline substance.
4 more elements
Dependencies are inferred from the claim text.