Asbestos-free sheet material for spiral-wound gaskets
First Claim
1. Non-asbestos flexible sheet material made by dewatering on a water-permeable conveyor a layer of aqueous slurry and compressing and drying the dewatered layer, the aqueous slurry employed being one that contains the following ingredients in the following proportions by dry weight:
- china clay;
20-40%mica or chlorite;
20-50%graphite;
10-40%cellulose fibres;
2-10%vitreous fibre in wool form;
2-10%synthetic organic polymer binder;
2-10%.
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Accused Products
Abstract
Non-asbestos flexible sheet material suitable for use in the manufacture of spiral wound gaskets is made by dewatering on a water-permeable conveyor a layer of aqueous slurry and compressing and drying the dewatered layer, the aqueous slurry employed being one that contains the following ingredients in the following proportions by dry weight:
china clay 20-50%
mica or chlorite 20-50%
graphite 10-40%
cellulose fibres 2-10%
vitreous fibre in wool form 2-10%
synthetic organic polymer binder 2-10%.
62 Citations
2 Claims
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1. Non-asbestos flexible sheet material made by dewatering on a water-permeable conveyor a layer of aqueous slurry and compressing and drying the dewatered layer, the aqueous slurry employed being one that contains the following ingredients in the following proportions by dry weight:
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china clay;
20-40%mica or chlorite;
20-50%graphite;
10-40%cellulose fibres;
2-10%vitreous fibre in wool form;
2-10%synthetic organic polymer binder;
2-10%. - View Dependent Claims (2)
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Specification