Hybrid high temperature insulation
AssigneeJohns Manville
InventorsAmes Kulprathipanja, Rick Lee Dolin, Severiano Almidon Lopez
Life of this patent
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Abstract
According to one aspect, a hybrid high temperature thermal insulation includes a mix of inorganic granules. The granular mix includes at least 70 weight percent porous inorganic granules in the form of expanded perlite, and at most 30 weight percent second porous inorganic granules other than expanded perlite. The hybrid insulation also includes a binder. In example formulations, the second porous inorganic particles may be made from crushed aerogel, from fumed silica, from precipitated silica, or from other substances. The hybrid insulation may be formed into preferred shapes, for example a board shape or a semi-cylindrical shape configured to fit over a round tube of a predetermined diameter.
Claims32
A hybrid high temperature thermal insulation, comprising:
- a mix of inorganic granules, the mix comprising at least 70 weight percent first porous inorganic granules in the form of expanded perlite, and at most 30 weight percent second porous inorganic granules, the second porous inorganic granules being other than expanded perlite;
- and
- a binder;
- wherein the insulation has a density of between 9 and 16 lbs/ft3.
A hybrid thermal insulation, comprising:
- a mix of inorganic granules, the mix comprising at least 70 weight percent first porous inorganic granules in the form of expanded perlite, and at most 30 weight percent second porous inorganic granules, the second porous inorganic granules being other than expanded perlite;
- and
- a binder;
- wherein the insulation has a thermal conductivity of less than 0.6 BTU-in/(ft2-h-° F.) when measured at 500° F.
A method of making thermal insulation, the method comprising:
- forming a mixture having at least 70 weight percent porous inorganic granules in the form of expanded perlite and at most 30 weight percent second porous inorganic granules, the second porous inorganic granules being other than expanded perlite;
- adding a binder to the mixture;
- pressing the mixture to a predetermined shape;
- oven drying the pressed shape;
- and
- cutting the predetermined shape to a final size.
Dependencies are inferred from the claim text.