3NextelTextiles

Ceramic fiber products for high temperatureaviation applications.

Physical Properties3M Nextel Fabrics, Tapes, and Sleevings are designedto meet the toughest thermal, mechanical and electricalperformance requirements, outperforming the usefullimits of other high temperature textiles. Nextel 312Ceramic Fibers and Nextel 440 Ceramic Fibers arecontinuous polycrystalline metal oxide fibers suitablefor producing textiles without the aid of other fiber or metal inserts.

Cost Competitive SolutionPer square foot costs can belower than competitivealternatives. Nextel qualityand product lifetime addlasting value.

Low ShrinkageProducts fabricated from

Nextel ceramic fibers exhibit very low shrinkage,providing excellent dimensional stability.

Abrasion ResistanceNextel 312 fibers demonstrated excellent abrasionresistance after a 30 minute exposure at up to 2000F(1093C). Nextel 312 fibers lasted 2.5 to 5 times longerthan leached glass in the Duplan Silk Abrasion Test.

Thermal Mechanical PropertiesProducts made with Nextel 312 and Nextel 440 ceramicfibers retain greater strength and flexibility at highertemperatures than other refractory textile materials.

Thermal Insulation PropertiesNextel fiber products have excellent resistance tothermal shock, have low thermal conductivity and canbe fabricated into excellent high temperature thermalinsulators.

Non-hygroscopicNextel 312 fibers smooth, non-porous surface onlygains 0.08% of its weight after 2 hours exposure to100% humidity.

3M Nextel can be used as thermal insulation for wire harnesses.

Spray-on insulation materials requireextensive downtime and present seriousenvironmental barriers for periodictesting and repair. Removable fireproofblankets provide superior insulationand fire protection, while drasticallyreducing maintenance downtime from 10 days to less than 12 hours.

Electrical PropertiesNextel fibers high electrical resistance at elevatedtemperatures, low shrinkage and low moisture absorptioncharacteristics make it excellent for high temperatureelectrical insulation applications. Nextel fibers contain noresidual acids or chlorides to leach out and cause etchingof metal.

Commercial Aviation Applications Boeing 777* MD90** Boeing 747* MD11** Boeing 727* DC10** Boeing 757* Airbus 300

MD80** Airbus 340

Top: Potential aircraft applications are fan cowl door insulators,struts, thrust reversers, and in engines as fire walls.

Above: AOE duct can be incorporated by pre-pregger with phenolic orepoxy resin to use a laid-up composite panel or structure. Engines Ducting Firewall Above, FAA Firewall Test: According to FAA fireproofing regulations,

commercial engine cowlings must be capable of withstanding a fuel-fedflame of 2000F for 15 minutes without flame penetration.

Silicon CarbideFabric

FAA Firewall TestingMaterial Backside Backside Peak Weight

Heat Flux Temperature

Stainless 8.9 BTU/ft.2-sec. 1364F 2.50 lbs./4ft.2Steel* (100,9 kw/m2) (740C) (1,13 kg/m2)

3M Nextel 5.5 BTU/ft.2-sec. 997F 0.25 lbs./ft.2312 Fabric (62,4 kw/m2) (536C) (0,113 kg/m2)Thermal performance using the FAA Flame Penetration Test. Burner Flame temperature of 2054F (1123C) and Heat Flux of 16.0 BTU/ft.2-Sec. (181,4 kw/m2)*0.015 in. thickness (0,0381mm)

Refractory Textile Temperature Limits2800(1537)2400(1315)2000(1093)1600

(871)1200

(648)800(426)

0.32(0.125)

0.63(0.250)

2.54(1.000)

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10 min. 60 min. 10 min. 60 min. 10 min. 60 min.1200C 1200C 1300C 1300C 1400C 1400C

(2192F) (2192F) (2372F) (2372F) (2552F) (2552F)Fabric Test Conditions

Fabric Flexibility After Thermal Exposure

Abrasion ResistanceStoll Flex & Abrasion

Resistance*w/sizing w/o sizing

Sample Weave Weight Thickness (Cycles to fail) (Cycles to fail)3M Nextel harness 25 oz./yd.2 0.039 in. 1580 400312 Textile satin (0,85 kg/m2) (0,99 mm)

Leached harness 36 oz./yd.2 0.054 in. 80 70Silica satin (1,22 kg/m2) (1,37 mm)Fused harness 8.4 oz./yd.2 0.014 in. 25 tooSilica satin (0,28 kg/m2) (0,35 mm) brittle

* The samples were heated at 1472F (800C) for 1/2 hour to remove sizing or finish. Thestandard wear bar on the Stoll tester was replaced with a 1/4 inch (6,35 mm) hex bar for thetests on samples without sizing. The tension applied to the sample was 1/2 pound (0,226 kg)for all tests.

Reprinted from the SAMPE Quarterly, Vol. 17, No. 1, October 1985. Strength and FlexibilityProperties of Ceramic Fabrics, Paul M. Sawko and Huy Kim Tran.

Glass Asbestos Fused Leached 3M NextelSilica Silica Nextel 440

312 Textile Textile

Top: 3M Nextel Textiles are the key element in: Gaskets and Seals Engines Ducting Firewalls

Above: Silicone coatings can easily be applied to3M Nextel Fabrics, shown here as blankets,helping to protect against impact from environmentalfactors.

IMPORTANT NOTICE TO PURCHASERAll statements, technical information, and recommendations contained in this brochure are based on tests conducted with 3M approved equipment,and are believed to be reliable. However, the accuracy or completeness of the tests is not guaranteed. THE FOLLOWING IS MADE IN LIEU OFALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR APARTICULAR PURPOSE: The sellers and manufacturers only obligation will be to replace the quantity of the product proved to be defective.Neither the seller nor 3M will be liable for any injury, loss or damage, direct or consequential, arising out of the use of or the inability to use theproduct. Before using, the user must determine the suitability of the product for his or her intended use.

*Trademark of Boeing Company.**Trademark of McDonald Douglas Corporation.Trademark of Airbus Industrie.

3Ceramic Fiber Products3M Center, Building 207-1W-11St. Paul, MN 55144-1000800/328-1687

Recycled paper. 40% pre-consumer10% post-consumerIssued: 11/96

Litho in USA with 3M films, proofing systems and offset plates. 3M 1996 98-0400-5207-2 (1161) DPI

3M is a technology leader in providing advanced ceramic materials forhigh temperature applications. Discover how our products can expand

your design capabilities to meet new performance requirements.

3MProperty Units Nextel 312 Nextel 440 Nextel 550 Nextel 610 Nextel 720UseTemperature 2200F 2500F 2200F 2200F 2200FFilamentDiameter m 10-12 10-12 10-12 10-12 10-12Crystal Size nm