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Title: Anisotropic fibrous thermal insulator of relatively thick cross section and method for making same

Abstract

The present invention is directed to an anisotropic thermal insulator formed of carbon-bonded organic or inorganic fibers and having a thickness or cross section greater than about 3 centimeters. Delaminations and deleterious internal stresses generated during binder curing and carbonizing operations employed in the fabrication of thick fibrous insulation of thicknesses greater than 3 centimeters are essentially obviated by the method of the present invention. A slurry of fibers, thermosetting resin binder and water is vacuum molded into the selected insulator configuration with the total thickness of the molded slurry being less than about 3 centimeters, the binder is thermoset to join the fibers together at their nexaes, and then the binder is carbonized to form the carbon bond. A second slurry of the fibers, binder and water is then applied over the carbonized body with the vacuum molding, binder thermosetting and carbonizing steps being repeated to form a layered insulator with the binder providing a carbon bond between the layers. The molding, thermosetting and carbonizing steps may be repeated with additional slurries until the thermal insulator is of the desired final thickness. An additional feature of the present invention is provided by incorporating opacifying materials in any of themore » desired layers so as to provide different insulating properties at various temperatures. Concentration and/or type of additive can be varied from layer-to-layer.« less

Inventors:
 [1];  [2]
  1. (Clinton, TN)
  2. (Oak Ridge, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
863346
Patent Number(s):
4152482
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
anisotropic; fibrous; thermal; insulator; relatively; thick; section; method; directed; formed; carbon-bonded; organic; inorganic; fibers; thickness; centimeters; delaminations; deleterious; internal; stresses; generated; binder; curing; carbonizing; operations; employed; fabrication; insulation; thicknesses; essentially; obviated; slurry; thermosetting; resin; water; vacuum; molded; selected; configuration; total; thermoset; join; nexaes; carbonized; form; carbon; bond; applied; molding; steps; repeated; layered; providing; layers; additional; slurries; desired; final; feature; provided; incorporating; opacifying; materials; provide; insulating; properties; various; temperatures; concentration; type; additive; varied; layer-to-layer; vacuum molding; stresses generated; thermosetting resin; relatively thick; thermal insulator; carbon bond; desired layer; insulating properties; total thickness; internal stresses; resin binder; layered insulator; desired final; internal stress; fibrous insulation; various temperature; anisotropic thermal; /442/156/264/423/428/

Citation Formats

Reynolds, Carl D., and Ardary, Zane L. Anisotropic fibrous thermal insulator of relatively thick cross section and method for making same. United States: N. p., 1979. Web.
Reynolds, Carl D., & Ardary, Zane L. Anisotropic fibrous thermal insulator of relatively thick cross section and method for making same. United States.
Reynolds, Carl D., and Ardary, Zane L. Mon . "Anisotropic fibrous thermal insulator of relatively thick cross section and method for making same". United States. https://www.osti.gov/servlets/purl/863346.
@article{osti_863346,
title = {Anisotropic fibrous thermal insulator of relatively thick cross section and method for making same},
author = {Reynolds, Carl D. and Ardary, Zane L.},
abstractNote = {The present invention is directed to an anisotropic thermal insulator formed of carbon-bonded organic or inorganic fibers and having a thickness or cross section greater than about 3 centimeters. Delaminations and deleterious internal stresses generated during binder curing and carbonizing operations employed in the fabrication of thick fibrous insulation of thicknesses greater than 3 centimeters are essentially obviated by the method of the present invention. A slurry of fibers, thermosetting resin binder and water is vacuum molded into the selected insulator configuration with the total thickness of the molded slurry being less than about 3 centimeters, the binder is thermoset to join the fibers together at their nexaes, and then the binder is carbonized to form the carbon bond. A second slurry of the fibers, binder and water is then applied over the carbonized body with the vacuum molding, binder thermosetting and carbonizing steps being repeated to form a layered insulator with the binder providing a carbon bond between the layers. The molding, thermosetting and carbonizing steps may be repeated with additional slurries until the thermal insulator is of the desired final thickness. An additional feature of the present invention is provided by incorporating opacifying materials in any of the desired layers so as to provide different insulating properties at various temperatures. Concentration and/or type of additive can be varied from layer-to-layer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

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