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Flame-retardant sheet and formed article therefrom

a technology of flame-retardant sheets and formed articles, which is applied in the direction of synthetic resin layered products, transportation and packaging, chemistry apparatus and processes, etc., can solve the problem that the flame-retardant cannot, however, guarantee an adequate fire-retardant, and achieve excellent fire-retardant performance and no toxic

Inactive Publication Date: 2007-01-11
NAGOYA OIL CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a fire resistant fiber sheet that contains expandable graphite to solve problems in the prior art. The fiber sheet is made with hollow or hollow fibers and low melting point fibers, which can be bound with a water soluble synthetic resin binder. The fiber sheet can be molded into a prescribed shape and has low ventilation resistance. When exposed to high temperatures, the expandable graphite expands to provide a self fire extinguishing property to the fiber sheet. The synthetic resin binder acts as a release agent and improves the adhesiveness of the expandable graphite to the fibers. A molded fiber sheet made from the fire resistant fiber sheet has low ventilation resistance. A laminated sheet made by laminating other fiber sheets on one or both sides of the fire resistant fiber sheet with a porous thermoplastic resin film has improved fire resistance."

Problems solved by technology

Said fire retardants cannot, however, guarantee an adequate fire resistance of said fiber sheet, and are feared to be toxic.

Method used

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  • Flame-retardant sheet and formed article therefrom

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0091] A fiber sheet (unit weight: 500 g / m2, thickness: 15 mm) was manufactured by the needle punching method, using a fiber web containing 80% by mass of polyester fiber (fiber fineness: 12 dtex fiver length : 52 mm) and 20% by mass of low-melting point polyester fiber (softening point: 110° C., fiber fineness: 8 dtex, fiber length : 54 mm). A treatment solution was prepared by adding and mixing 20 parts by mass of expandable graphite (expansion start temperature 300 to 320° C., expansion rate: 100 times) to 80 parts by mass of phenol-formaldehyde precondensation polymer (solid content 50% by mass). The viscosity of said treatment solution was 100 mPa·s.

[0092] Said treatment solution was impregnated into said fiber sheet in an amount of 50% by mass solid content, after which said fiber sheet into which said treatment solution was impregnated, was then dried in a drying chamber with decompression, at 100 to 120° C. for 3 minutes, to precure said fiber sheet. Said precured fiber she...

example 2

[0093] A treatment solution was prepared by adding and mixing 20 parts by mass of polyvinylalcohol water solution (10% by mass of solid content, saponification degree 98.5 mol %) and 20 parts by mass of expandable graphite (expansion start temperature : 300 to 320° C., expansion rate, 100 times) into 60 parts by mass of phenol formaldehyde precondensation polymer (50% by weight solid content). The viscosity of said treatment solution was 250 mPa·s. Using said treatment solution, a molded fiber sheet having a thickness of 10 mm was manufactured in the same manner as EXAMPLE 1. The ventilation resistance of the resulting molded fiber sheet was measured using the same tester as used in EXAMPLE 1 was 4.1 kPa·s / m.

example 3

[0094] A treatment solution was prepared by adding and mixing 15 parts by mass of polyvinyl alcohol water solution (10% by mass solid content, saponification degree 98.5 mol %), 4parts by mass of PRIMAL, ASE-60 (Rohm and Haas Co., Trade Name) which is an emulsion of slightly cross-linked ethyl acrylate-methacrylic acid copolymer as an alkali soluble thickener, 20 parts by mass of expandable graphite (expansion start temperature: 300 to 320° C., expansion rate: 130 times), and 1 part by mass of ammonia water (27% by mass) into 60 parts by mass of phenol-folmaldehyde precondensation polymer water solution (50% by mass solid content). The viscosity of the resulting treatment solution was 950 mPa·s / m.

[0095] By using said treatment solution, a molded fiber sheet (thickness 10 mm) was manufactured in the same manner as EXAMPLE 1. The ventilation resistance of the resulting molded fiber sheet was measured using the same tester as used in EXAMPLE 1 was 4.6 kPa·s / m.

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Abstract

The object of the present invention is to provide a highly fire resistant fiber sheet and a molded fiber sheet thereof. The fibers of the fire resistant sheet of the present invention contain expandable graphite. When said expandable graphite is exposed to high temperatures, it will expand, giving self-extinguishing properties to said fiber sheet. Since said fire resistant molded fiber sheet is highly fire resistant and nontoxic to humans and animals, it is useful for car or building interiors, and the like.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a fire resistant fiber sheet and a molded fiber sheet thereof, used for car or building interiors, and the like. BACKGROUND OF THE INVENTION [0002] Hitherto, for instance, needled nonwoven fabric, or needled felt, which are made by needle punching intertwining fibers, and resin nonwoven fabric, or resin felt, which is made by binding fibers with synthetic resin, or fiber knitting and fabric, and the like have been provided. [0003] JP 11-61616 JP 8-39596 [0004] In said fiber sheet, fire resistance as well as sound proof and insulation properties are necessary. [0005] To give said fiber sheet a fire resistance property, a fire retardant, such as tetrachlorophthalic acid, tetrabromophthalic acid, tetrabromobis phenol A, antimony trioxide, chlorinated paraffin, and the like are contained in said fiber sheet. [0006] Said fire retardants cannot, however, guarantee an adequate fire resistance of said fiber sheet, and are feared...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H3/00
CPCB32B5/26E04B1/941B32B27/20B32B2250/02B32B2250/20B32B2260/023B32B2260/046B32B2262/0253B32B2262/0276B32B2264/108B32B2307/3065B32B2419/00B32B2605/00B60R13/08D04H1/425D04H1/435D04H1/4391D04H1/48D04H1/587D04H1/64D06M11/74D06N3/0063B32B27/12D04H1/43914Y10T428/249924
Inventor OGAWA, MASANORIITO, KUNINORIHIRANO, MORIMICHI
Owner NAGOYA OIL CHEM CO LTD
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