Product based on mineral fibers and process for obtaining it

Patent metadata

Field	Value
Publication number	US-9469563-B2
Application number	US-91991609-A
Country	US
Kind code	B2
Filing date	Feb 27, 2009
Priority date	Feb 28, 2008
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A thermal insulation product based on mineral wool, characterized in that the fibers have a micronaire of less than 10 l/min, preferably less than 7 l/min and especially between 3 and 6 l/min, the product including infrared absorbent and/or reflective elements, and in that the product has a thermal conductivity of less than 30 mW/m.K.

First claim

The invention claimed is:

1. A thermal insulation product comprising mineral wool comprising fibers, wherein the fibers have a micronaire of less than 10 l/min, wherein the product comprises infrared absorbent and/or reflective elements, and the product has a thermal conductivity of less than 30 mW/m.K,
wherein at least 75% of the fibers are approximately parallel to the longest dimensions of the product,
the thermal insulation product has a density of at most 35 kg/m 3 , and
the approximately parallel fibers are produced by depositing infrared absorbed and/or reflective elements on fibers with an installation comprising an internal centrifugation device that comprises a spinner capable of rotating about an axis X which has its peripheral band drilled with a plurality of orifices for delivering filaments of a molten material, an annular burner which attenuates the filaments into fibers, a receiving belt for receiving the fibers, and a conveyor for the fibers that extends beyond the receiving belt, wherein the speed of the conveyor is greater than the speed of the receiving belt by more than 10%.

2. The thermal insulation product as claimed in claim 1 , having a density of less than 30 kg/m 3 .

3. The thermal insulation product as claimed in claim 1 , wherein the infrared absorbent and/or reflective elements are aluminum metal particles.

4. The thermal insulation product as claimed in claim 1 , wherein the infrared absorbent and/or reflective elements are metal particles in a proportion of between 1 and 10%, by weight of the product.

5. The thermal insulation product as claimed in claim 4 , wherein the infrared absorbent and/or reflective elements have a size of between 5 and 25 μm.

6. The thermal insulation product as claimed in claim 1 , having a thickness equal to or greater than 30 mm.

7. The thermal insulation product as claimed in claim 1 , wherein said product is in the form of a roll.

8. The thermal insulation product as claimed in claim 1 , wherein said product is integrated into an acoustic insulation system.

9. The thermal insulation product as claimed in claim 1 , wherein the mineral wool comprises glass fibers with a proportion of unfiberized material of less than 1%.

10. The thermal insulation product as claimed in claim 1 , wherein the mineral wool comprises lime-borosilicate glass fibers, with a boron content of less than 10%, by weight of the glass composition.

11. The thermal insulation product as claimed in claim 1 , wherein said product is obtained by a process comprising internal centrifugation fiberizing and by depositing infrared absorbent and/or reflective elements on the fibers.

12. The thermal insulation product of claim 1 , wherein a structure of the mineral wool comprises the fibers, bound together by a binder, in proportions less than 8% by weight of the product.

13. The thermal insulation product of claim 1 , wherein the fibers have a micronaire of less than 7 L/min.

14. The thermal insulation product of claim 1 , wherein the fibers have a micronaire of between 3 and 6 L/min.

15. The thermal insulation product of claim 1 , having an average fiber diameter less than 2 μm.

16. The thermal insulation product of claim 1 , having an average fiber diameter of less than 1 μm.

17. The thermal insulation product of claim 1 , wherein the fibers are approximately parallel to the longest dimensions of the product in a proportion of at least 80%.

18. The thermal insulation product of claim 1 , wherein the speed of the conveyor is greater than the speed of the receiving belt by more than 15%.

19. The thermal insulation product of claim 1 , having a density of between 20 and 30 kg/m 3 .

Assignees

• Letourmy Arnaud
• Douce Jerome
• Goletto Valerie
• Gilles Jerome
• Saint Gobain Isover

Inventors

• Letourmy Arnaud
• Douce Jerome
• Goletto Valerie
• Gilles Jerome

Classifications

• C03C25/00

  Surface treatment of fibres or filaments made from glass, minerals or slags · CPC title

• C03B37/10

  Non-chemical treatment (surface treatment of fibres or filaments made from glass, minerals or slags C03C25/00) · CPC title

• D04H1/70

  characterised by the method of forming fleeces or layers, e.g. reorientation of fibres · CPC title

• Y10T428/25

  Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles · CPC title

• C03B37/04

  by using centrifugal force {, e.g. spinning through radial orifices; Construction of the spinner cups therefor (bonder application C03C25/00)} · CPC title