초록 ▼

Coating of woven materials so that not only the outer surfaces are coated has been a problem. Now, a solution to that problem is the following: Woven materials are coated with materials, for example with metals or with pyrolytic carbon, which materials are deposited in Chemical Vapor Deposition (CVD

Coating of woven materials so that not only the outer surfaces are coated has been a problem. Now, a solution to that problem is the following: Woven materials are coated with materials, for example with metals or with pyrolytic carbon, which materials are deposited in Chemical Vapor Deposition (CVD) reactions using a fluidized bed so that the porosity of the woven material is retained and so that the tiny filaments which make up the strands which are woven (including inner as well as outer filaments) are substantially uniformly coated.

대표청구항 ▼

A method of coating a woven material with a coating material, said method comprising the following steps in the following order: (a) introducing a first gas into a chamber containing a bed of carrier particles, said first gas being introduced at a rate sufficient to produce and maintain during the f

A method of coating a woven material with a coating material, said method comprising the following steps in the following order: (a) introducing a first gas into a chamber containing a bed of carrier particles, said first gas being introduced at a rate sufficient to produce and maintain during the following steps a fluidized bed; (b) introducing pieces of said woven material into said fluidized bed, said pieces being sufficiently small relative to the size of said chamber and having a density relative to the density of said fluidized bed so that said pieces move substantially randomly in said fluidized bed; (c) heating said chamber and allowing the average temperature of said fluidized bed and of said woven material to reach a chosen deposition temperature, said chosen deposition temperature being a temperature which is at least as high as the temperature required for said coating material to be formed in a particular chemical vapor deposition reaction from at least one reactant gas, and said chosen deposition temperature being a temperature low enough so that said woven material retains its porosity; (d) introducing said at least one reactant gas into said fluidized bed, said at least one reactant gas being such that it reacts to deposit said coating material onto said woven material at said chosen deposition temperature; and (e) allowing said at least one reactant gas to react within said fluidized bed to deposit said coating material onto said woven material, said woven material having a melting point which is higher than said chosen deposition temperature.