System and method for fiber reinforced aerogel insulation

Patent metadata

Field	Value
Publication number	US-11143353-B2
Application number	US-202016790958-A
Country	US
Kind code	B2
Filing date	Feb 14, 2020
Priority date	Sep 12, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A fiber reinforced insulation product may include a first layer of fiber reinforced aerogel composite and a second layer of fiber reinforced aerogel composite. The first layer may include entangled fibers, aerogel particles dispersed within the entangled fibers, and a first binder that may form a first binding framework that bonds the entangled fibers and the aerogel particles of the first layer together. The second layer may include entangled fibers, aerogel particles dispersed within the entangled fibers, and a second binder that may form a second binding framework that bonds the entangled fibers and the aerogel particles of the second layer together. The fiber reinforced insulation product may further include a third binder that may form a third binding framework that bonds the first layer and the second layer together. The third binder may be dispersed throughout the first layer and the second layer.

First claim

What is claimed is:

1. A method for producing a pipe insulation product, wherein the method comprises:
providing a first mat of fiber reinforced aerogel composite, the first mat having a first density;
providing a second mat of fiber reinforced aerogel composite, the second mat having a second density; and
forming an insulation product of fiber reinforced aerogel composite from the first mat and the second mat, the insulation product having a third density, wherein the third density is greater than the first density and the second density and wherein a ratio of the third density to the first density or the second density is between about 1.2:1 and about 2:1;
wherein providing the first mat of fiber reinforced aerogel composite or the second mat of fiber reinforced aerogel composite comprises:
providing an aqueous solution that includes aerogel particles and fibers, the aerogel particles and the fibers uniformly dispersed in the aqueous solution to form a slurry;
transferring the slurry onto a porous surface; and
removing water from the slurry to form a wet laid material mixture of the aerogel particles and the fibers atop the porous surface.

2. The method for producing a pipe insulation product of claim 1 , wherein the first density or second density is between about 4 pcf and about 5 pcf, and the third density is between about 6 pcf and about 8 pcf.

3. The method for producing a pipe insulation product of claim 1 , wherein providing the first mat of fiber reinforced aerogel composite or the second mat of fiber reinforced aerogel composite further comprises:
curing the wet laid material mixture to bond the fibers and the aerogel particles together to form the first or second mat.

4. The method for producing a pipe insulation product of claim 1 , wherein providing the first mat of fiber reinforced aerogel composite or the second mat of fiber reinforced aerogel composite further comprises:
applying additional aerogel particles to the top of the wet laid material mixture of the aerogel particles and the fibers.

5. The method for producing a pipe insulation product of claim 1 , wherein the first or second mat includes between about 65 wt.% and about 80 wt.% of the aerogel particles, and wherein the insulation product includes between about 50 wt.% and about 75 wt.% of the aerogel particles.

6. The method for producing a pipe insulation product of claim 1 , wherein the first or second mat includes a thickness between about 1 mm and about 10 mm.

7. The method for producing a pipe insulation product of claim 1 , wherein the fibers comprise bicomponent fibers, and wherein providing the aqueous solution comprises:
vortex mixing the aerogel particles and the bicomponent fibers in the aqueous solution.

8. The method for producing a pipe insulation product of claim 7 , wherein forming the insulation product of fiber reinforced aerogel composite includes:
heating adjacent surfaces of the at least two layers of the mat such that a binding agent of the bicomponent fibers is activated; and
compressing the adjacent surfaces of the at least two layers of the mat towards each other such that the at least two layers form a laminate.

9. The method for producing a pipe insulation product of claim 7 , wherein the fibers further comprises glass fibers.

10. The method for producing a pipe insulation product of claim 1 , wherein the fibers comprises coarse glass fibers.

11. The method for producing a pipe insulation product of claim 10 , wherein the fibers further comprises glass microfibers.

12. The method for producing a pipe insulation product of claim 1 , wherein providing the first mat of fiber reinforced aerogel composite or the second mat of fiber reinforced aerogel composite further comprises:
adding a binder to the wet laid material mixture.

13. The method for producing a pipe insulation product of claim 12 , wherein the binder includes polyvinyl alcohol.

14. The method for producing a pipe insulation product of claim 12 , wherein forming the insulation product of fiber reinforced aerogel composite includes:
reactivating the binder by wetting the binder;
compressing the first mat and the second mat after reactivating the binder; and
curing the reactivated binder to bond the first mat and the second mat together.

15. The method for producing a pipe insulation product of claim 1 , wherein forming the insulation product of fiber reinforced aerogel composite includes:
dipping the first or second mat into a liquid binder such that the mat is saturated with the liquid binder.

16. The method for producing a pipe insulation product of claim 15 , wherein the first mat and the second mat are portions of a continuous mat, and wherein forming the insulation product of fiber reinforced aerogel composite includes:
winding the first or second mat around a mandrel to form compressed, overlapping layers of the first or second mat about the mandrel; and
curing the layers of the first or second mat around the mandrel such that the liquid binder cures to maintain the compressed state of the layers of the first or second mat and to bond adjacent surfaces of the overlapping layers of the first or second mat.

17. The method for producing a pipe insulation product of claim 15 , wherein forming the insulation product of fiber reinforced aerogel composite:
stacking multiple layers of the first or second mat saturated with the liquid binder;
winding the stacked layers of the first or second mat around a mandrel to compress the stacked layers of the first or second mat; and
curing the stacked layers around the mandrel such that the liquid binder cures to maintain the compressed state of the layers of the first or second mat and to bond adjacent surfaces of the stacked layers of the first or second mat.

18. The method for producing a pipe insulation product of claim 15 , wherein forming the insulation product of fiber reinforced aerogel composite comprises:
stacking multiple layers of the first or second mat saturated with the liquid binder;
compressing the stacked layers into a mold; and
curing the stacked layers inside the mold such that the liquid binder cures to maintain the compressed state of the layers of the first or second mat and to bond adjacent surfaces of the stacked layers of the first or second mat.

19. The method for producing a pipe insulation product of claim 1 , wherein providing the first mat of fiber reinforced aerogel composite or the second mat of fiber reinforced aerogel composite further comprises adding a binder to the wet laid material mixture, and wherein forming the insulation product of fiber reinforced aerogel composite includes:
compressing the first mat of fiber reinforced aerogel composite and the second mat of fiber reinforced aerogel composite; and
curing the binder to bond the first mat of fiber reinforced aerogel composite and the second mat of fiber reinforced aerogel composite.

20. A method for producing an insulation product, wherein the method comprises:
providing a mat of fiber reinforced aerogel composite, the mat having a first density; and
forming an insulation product of fiber reinforced aerogel composite from the mat of fiber reinforced aerogel composite and at least one additional mat of fiber reinforced aerogel composite, the insulation product having a second density that is greater than the first density by at least about 40%;
wherein providing the mat of fiber reinforced aerogel composite further comprises:
providing an aqueous solution that includes aerogel particl

Assignees

• Johns Manville

Inventors

• Fay Ralph Michael
• Kukatin Stanislav

Classifications

• B32B5/024

  Woven fabric · CPC title

• C09K21/00

  Fireproofing materials (for use in a particular application, see the relevant places, e.g. fireproofing of wood B27K, of polymers C08, of textiles D06M, of paper D21H; fireproof paints C09D5/18) · CPC title

• F16L59/14

  Arrangements for the insulation of pipes or pipe systems (F16L59/02 - F16L59/12 take precedence) · CPC title

• B32B27/12

  next to a fibrous or filamentary layer · CPC title

• B32B5/028

  Net structure, e.g. spaced apart filaments bonded at the crossing points · CPC title