Dispensing fibrous cellulose material

• US 6,120,626 A
• Filed: 10/23/1998
• Issued: 09/19/2000
• Est. Priority Date: 10/23/1998
• Status: Expired due to Fees

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Hamilton, Brian K.
• Primary Examiner(s): Jordan, Charles T.
• Assistant Examiner(s): FELTON, AILEEN BAKER
• Application Number:
  US09/178,288
• Time in Patent Office: 697 Days
• Field of Search: 149/2, 149/21, 149/46, 149/87, 149/60, 149/109.6, 149/88, 241/16, 252/1
• US Class Current: 149/2
• CPC Class Codes: C06B 23/001 Fillers, gelling and thickening agents (e.g. fibres) , absorbents for nitroglycerine binders, plasticisers for propellants C06B45/10; crosslinking or curing agents C06B45/10
• CPC Class Codes: C06B 45/00 Compositions or products which are defined by structure or arrangement of component of product explosive charges of particular form or shape F42B1/00, F42B3/00
• CPC Class Codes: C06D 5/06 by reaction of two or more solids

Abstract

A dispersal agent for preventing agglomerating of at least one component of a material is provided. In one embodiment, the dispersal agent is part of a porosity producing material and the dispersal agent eliminates or substantially prevents agglomeration of the porosity producing material. In one embodiment, the porosity producing material is fibrous cellulous. Such fibrous cellulose may be part of a porosity producing material, which is part of a propellant composition. The propellant composition can be used in an inflator housed in a vehicle.

Claims

1. A combination of components that are joined together by mixing into a viscous mixture, comprising:

a first component comprising a number of pieces, with each of said first component pieces having a width and length, at least a majority of said first component pieces being a fibrous cellulosic material, said fibrous cellulosic material being elongated in which said lengths of said fibrous cellulosic material are at least greater than about 1000 microns;

a second component comprising a number of pieces, with each of said component pieces having a width and a length and in which said widths of said first component pieces are greater than said widths of said second component pieces and wherein, when said first component and said second component are joined together by mixing, said second component substantially prevents agglomerating of said first component; and

a viscous liquid carrier.

2. A combination, as claimed in claim 1, wherein:

said widths of said fibrous cellulosic material are at least five times greater than said widths of said second component pieces.

3. A combination, as claimed in claim 1, wherein:

said widths of said fibrous cellulosic material are in a range of about 2.5 microns-250 microns and said widths of said second component pieces are in the range of about 0.05 microns-0.5 microns.

4. A combination, as claimed in claim 3, wherein:

said lengths of said fibrous cellulosic material are less than about 10,000 microns.

5. A combination, as claimed in claim 1, wherein:

said fibrous cellulosic material includes fibrous cellulose.

6. A combination, as claimed in claim 5, wherein:

said second component includes a dispersal agent that separates said fibrous cellulosic material.

7. A combination, as claimed in claim 1, further including:

a fuel-rich material; and

an oxidizer material, wherein said combination is used to form a propellant.

8. A combination, as claimed in claim 7, wherein:

said fuel-rich material is selected from a group that includes nitroguanidine, triaminoguanidine nitrate, aminoguanidine nitrate, RDX, HMX, and PETN.

9. A combination, as claimed in claim 1, wherein:

said first component is selected from a group that includes said fibrous cellulosic material, and wherein non-fibrous cellulosic materials including nitro-cellulose, cellulose acetate and cellulose acetate butyrate are excluded from said group.

10. A combination, as claimed in claim 1, wherein:

said viscous liquid carrier includes a plastic polymer and a solvent.

11. A combination, as claimed in claim 10, wherein:

said viscous liquid carrier includes a solution of hydroxypropylcellulose and one of alcohol and alcohol-water azeotrope.

12. A combination of components that are joined together by mixing into a viscous mixer, comprising:

a first component comprising a number of pieces, with each of said first component pieces having a width and a length;

a second component comprising a number of pieces, with each of said second component pieces having a width and a length and in which said widths of said first component pieces are greater than said widths of said second component pieces and wherein, when said first component and said second component are joined together by mixing, said second component substantially prevents agglomerating of said first component; and

a viscous liquid carrier, said viscous liquid carrier including a solution of about 10%-30% by weight of hydroxypropylcellulose and about 90%-70% by weight of one of alcohol and alcohol-water azeotrope.

13. A method for preventing agglomerating of a material, comprising:

providing a first material having a number of pieces, each of said pieces having a width and a length, with at least a majority of said pieces being elongated and said lengths of said majority of pieces being at least four times greater than said widths of said majority of pieces;

providing a second material, different from said material, having a number of pieces, each of said pieces having a width and a length, said widths of said first component pieces being greater than said widths of said second component pieces;

providing a viscous liquid carrier; and

forming a mixture of said first and second materials and said viscous liquid carrier and in which said forming step includes substantially preventing said first component pieces from agglomerating using said second component pieces.

14. A method, as claimed in claim 13, wherein:

said widths of said first material pieces are at least five times greater than said widths of said second material pieces.

15. A method, as claimed in claim 13, wherein:

said first material includes fibrous cellulose.

16. A method, as claimed in claim 13, further including:

combining at least one of a fuel-rich material and an oxidizer material to said mixture.

17. A method, as claimed in claim 16, further including:

extruding said mixture to provide a homogenous mixture having a length.

18. A method, as claimed in claim 13, wherein:

said second material includes a dispersal agent that separates a said number of pieces of said first material.

19. A method for substantially preventing agglomerating of a material, comprising:

providing a first material having a number of pieces, each of said pieces having a width and a length;

providing a second material having a number of pieces, each of said pieces having a width and a length, said widths of said first component pieces being greater than said widths of said second component pieces;

providing a viscous liquid carrier, said viscous liquid carrier including a solution of hydroxypropylcellulose and at least one of alcohol and alcohol-water azeotrope; and

forming a mixture of said first and second materials and said viscous liquid carrier and in which said forming step includes substantially preventing said first component pieces from agglomerating using said second component pieces.