Yarn manufacturing
AssigneeTBA Industrial Products Limited
InventorRalph Huggett
Life of this patent
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Abstract
A process for making a dispersion-based asbestos strand for later twisting to form a yarn comprises (a) forming an elongate continuous stream from an aqueous coagulable dispersion comprised of asbestos fibres, water and dispersion-forming chemicals; (b) coagulating said dispersion in said stream to form a self-sustaining asbestos fibre strand containing coagulated dispersion-forming chemicals together with uncoagulated residues thereof and water; (c) while said strand is in an untwisted state removing substantially the whole of the coagulated dispersion-forming chemicals and said uncoagulated residues thereof; and (d) adjusting the water content of the strand to provide an untwisted strand formed substantially wholly of said asbestos fibres and containing not more than 20% by weight of water.
Claims9
A process for making a dispersion-based asbestos strand for later twisting to form a yarn, said process comprising the steps of:
- a. forming an elongate continuous stream from an aqueous coagulable dispersion comprised of asbestos fibres, water and dispersion-forming chemicals;
- b. coagulating said dispersion in said stream to form a self-sustaining asbestos fibre strand containing coagulated dispersion-forming chemicals together with uncoagulated residues thereof and water;
- c. whilst said strand is in an untwisted state removing substantially the whole of the coagulated dispersion-forming chemicals and said uncoagulated residues thereof, and
- d. adjusting the water content of the strand to provide an untwisted strand formed substantially wholly of said asbestos fibres and containing not more than 20% by weight of water.
The method of making asbestos yarn which comprises the step of
- a. providing an aqueous dispersion of asbestos fibres in dispersion-forming chemicals;
- b. forming at least one elongate continuous stream of said dispersion and contacting said stream with a coagulant for said dispersion to form at least one self-sustaining wet strand of asbestos fibres and coagulated dispersion-forming chemicals together with uncoagulated residues thereof and water;
- c. extracting substantially all of said coagulated dispersion forming chemicals and uncoagulated residues thereof from the wet strand;
- d. adjusting the water content of the wet strand to provide an essentially dry strand having a moisture content of not more than 20% by weight allowing the twisting of said dry strand on a spinning frame, and
- e. twisting said essentially dry strand to provide said asbestos yarn.
Dependencies are inferred from the claim text.