Flame-Retardant Fiber Sheet and Formed Article Thereof

• US 20080157036A1
• Filed: 12/27/2005
• Published: 07/03/2008
• Est. Priority Date: 01/07/2005
• Status: Abandoned Application

• Current Assignee: Nagoya Oilchemical Co., Ltd.
• Original Assignee: Nagoya Oilchemical Co., Ltd.
• Inventors: Ogawa, Masanori, Watanabe, Tsuyoshi, Hirano, Morimichi
• Application Number:
  US11/794,884
• Publication Number:
  US 20080157036A1
• Time in Patent Office: Days
• US Class Current: 252/608
• CPC Class Codes: B60R 13/08 Insulating elements, e.g. for sound insulation sound insulating linings for trains B61D17/185; drivers' cabs for load-carrying vehicles insulated against vibrations or noise B62D33/0604; thermal or acoustic insulation of engines F02B77/11; damping of sounds using compensation by electro-acoustic methods G10K11/178
• CPC Class Codes: B60R 13/0815 Acoustic or thermal insulation of passenger compartments wall or roof liners integrating the insulating function B60R13/02; insulating floor mats or carpets B60N3/04
• CPC Class Codes: B60R 13/0838 for engine compartments
• CPC Class Codes: B60R 13/0876 for mounting around heat sources, e.g. exhaust pipes
• CPC Class Codes: D04H 1/42 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
• CPC Class Codes: D06M 11/72 with metaphosphoric acids or their salts; with polyphosphoric acids or their salts; with perphosphoric acids or their salts
• CPC Class Codes: D06M 11/74 with carbon or graphite; with carbides; with graphitic acids or their salts
• CPC Class Codes: D06M 2200/30 Flame or heat resistance, fire retardancy properties
• CPC Class Codes: D06M 23/06 Processes in which the treating agent is dispersed in a gas, e.g. aerosols aerosol compositions C09K3/30
• CPC Class Codes: D06M 23/16 Processes for the non-uniform application of treating agents, e.g. one-sided treatment; Differential treatment
• CPC Class Codes: E04B 1/941 Building elements specially adapted therefor

Abstract

The object of the present invention is to provide a fiber sheet or a molded fiber sheet having excellent flame retardancy

A flame retardant fiber sheet containing a polyammonium phosphate with average degree of polymerization in the range of between 10 and 40 is provided in the present invention.

The polyammonium phosphate is insoluble or sparingly soluble in water so that said polyammonium phosphate gives the fiber sheet excellent flame retardancy with water resistance and durability, and is also inexpensive.

The molded fiber sheet is highly flame retardant and harmless, so that the molded fiber sheet is useful for automobile and building interiors.

Claims

1. A flame retardant fiber sheet containing a polyammonium phosphate having an average degree of polymerization in the range of between 10 and 40.

3. A flame retardant fiber sheet in accordance with claim 1, wherein fiber having a melting point of below 180°

C. is mixed.

4. A flame retardant fiber sheet in accordance with claim 1, wherein said fiber is bound or intertwined by a synthetic resin binder and/or needling.

5. A flame retardant fiber sheet in accordance with claim 4, wherein said synthetic resin binder is powder or aqueous solution, said polyammonium phosphate whose average degree of polymerization is in the range of between 10 and 40, or said polyammonium phosphate and said expandable graphite are dispersed in said aqueous solution, with the resulting dispersion being impregnated in or coated on to a fiber sheet.

6. A flame retardant resistant fiber sheet in accordance with claim 5, wherein a water soluble resin is dissolved in said aqueous solution.

7. A flame retardant fiber sheet in accordance claim 4, wherein said synthetic resin binder is a phenol group resin.

8. A flame retardant fiber sheet in accordance with claim 7, wherein said phenol group resin is sulfomethylated and/or sulfimethylated.

9. A molded fiber sheet in accordance with claim 1, wherein said flame retardant fiber sheet is molded into a prescribed shape.

10. A molded fiber sheet in accordance with claim 9, wherein the ventilation resistance of said molded sheet is in the range of between 0.01 and 100 kPa·

s/m.

2. A flame retardant fiber sheet containing a polyammonium phosphate having an average degree of polymerization in the range of between 10 and 40, and an expandable graphite.

11. A flame retardant fiber sheet in accordance with claim 2, wherein fiber having a melting point of below 180°

C. is mixed.

12. A flame retardant fiber sheet in accordance with claim 2, wherein said fiber is bound or intertwined by a synthetic resin binder and/or needling.

13. A flame retardant fiber sheet in accordance with claim 12, wherein said synthetic resin binder is powder or aqueous solution, said polyammonium phosphate whose average degree of polymerization is in the range of between 10 and 40, or said polyammonium phosphate and said expandable graphite are dispersed in said aqueous solution, with the resulting dispersion being impregnated in or coated on to a fiber sheet.

14. A flame retardant fiber sheet in accordance with claim 13, wherein said synthetic resin binder is powder or aqueous solution, said polyammonium phosphate whose average degree of polymerization is in the range of between 10 and 40, or said polyammonium phosphate and said expandable graphite are dispersed in said aqueous solution, with the resulting dispersion being impregnated in or coated on to a fiber sheet.

15. A flame retardant fiber sheet in accordance with claim 12, wherein said synthetic resin binder is a phenol group resin.

16. A flame retardant fiber sheet in accordance with claim 15, wherein said phenol group resin is sulfomethylated and/or sulfimethylated.

17. A molded fiber sheet in accordance with claim 2, wherein said flame retardant fiber sheet is molded into a prescribed shape.

18. A molded fiber sheet in accordance with claim 17, wherein said flame retardant fiber sheet is molded into a prescribed shape.