Phosphate cement pipe cladding
AssigneeArmstrong World Industries, Inc.
InventorsJeffery L. Barrall, Debra L. Morris, Carrielee Fidler
Life of this patent
Estimating the term…
Abstract
A pipe cladding composition is described which is a phosphate ceramic permeating a non-woven fibrous network. The overall thickness of the sheet is between about 5 and about 20 mils. The phosphate ceramic permeates the fibrous network and extends beyond the fibrous network only up to a maximum thickness of about 3 mils across each side of the sheet. The sheets are prepared using wet reaction mixtures which produce phosphate ceramics. These reaction mixtures are mixed and pressed into the non-woven fibrous network which forms a wet sheet that is then cured to provide the cladding material.
Claims14
A pipe cladding sheet which comprises a non-woven fibrous network with two faces and a phosphate ceramic permeating the network, the pipe cladding sheet having a thickness in the range of from about 5 to about 20 mils, wherein the non-woven fibrous network has a thickness in the range of from about 5 to about 16 mils and contains polymer fibers, further providing that the phosphate ceramic can extend beyond the fibrous network only up to a maximum thickness of about 3 mils on each face, further providing that the sheet naturally rests in a curled, cylindrical position, and has a curl memory.
Pipe cladding which comprises a non-woven fibrous network with two faces and a phosphate ceramic permeating the network;
- further providing that the pipe cladding naturally rests in a curled, cylindrical position and has a curl memory and further has heat softenable polymer fibers in the non-woven fibrous network in an amount effective to give the cladding the curl memory.
Dependencies are inferred from the claim text.