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DuPont™ Nomex® E56 Paper, 15 mil Nominal Thickness

Aramid

DuPont

产品说明

Nomex® Type E56 is designed for cost critical uses which require lesser amounts of mechanical and electrical strength than other Nomex® grades. It is thermally similar to Nomex® Type 410 but as a medium density paper, its properties are between Types 410 and 411. Nomex® Type E56 is designed for use as layer insulation within transformers and as phase insulation in hand-wound motors. It can also be used as electrical and thermal barriers in appliance and electronic equipment applications.

General NOMEX Information: Nomex® is a family of aromatic polyamide (aramid) fibers. This family consists of staple fibers, continuous filament yarns, paper, and spunlaced fabrics. The paper is produced from two forms of the aramid polymer. Small fibrous binder particles (fibrids) derived directly from the polymer under high shear conditions are mixed with short fibers (floc) which are cut to length from a fiber filament. The floc and fibrids are combined in a water based slurry from which a continuous sheet is produced on a specialized papermaking machine. This initial paper (as in Type 411) is low density and has poor properties. Subsequent densification and internal bonding is achieved by high temperature calendaring. The resulting paper is mechanically strong and has good electrical properties. Some uses for paper product include insulation in electric motors and transformers, wire wrapping, and honeycombed strength members in many aircraft. Nomex® brand fibers are inherently flame resistant: the flame resistance is a polymer property and does not diminish with the life of the fiber.

Nomex® meta-aramid, poly(meta-phenyleneisophthalamide), is prepared from meta-phenylenediamine and isophthaloyl chloride in an amide solvent. It is a long chain polyamide in which at least 85% of the amide linkages are attached directly to two aromatic rings. The meta oriented phenylene forms bends in the polymer chain, reducing chain rigidity as compared to the para orientation in the chemically similar Kevlar® chain. This flexible polymer chain gives Nomex® more textile-like qualities while retaining high temperature properties similar to Kevlar®.

Information provided by DuPont.

物理性能额定值 (公制)额定值 (英制)测试方法
体积密度 g/cc lb/in³
密度 g/cc lb/in³
厚度 microns mil Nominal
microns mil Typical; ASTM D374
机械性能额定值 (公制)额定值 (英制)测试方法
断裂伸长率,MD ASTM D828
断裂伸长率,TD ASTM D828
Tear Strength, Total N lb (f) Initial in TD; ASTM D1004
N lb (f) Initial in MD; ASTM D1004
抗张强度(MD : 断裂) MPa psi Calculated from mfr's report of 224 N/cm per ASTM D828 and the typical thickness
抗张强度(TD : 断裂) MPa psi Calculated from mfr's report of 116 N/cm per ASTM D828 and the typical thickness
电气性能额定值 (公制)额定值 (英制)测试方法
介电常数
@Frequency 60 Hz
@Frequency 60 Hz
ASTM D150
介电强度 kV/mm kV/in AC Rapid Rise; ASTM D149
kV/mm kV/in Full-wave Impulse; ASTM D3426
耗散因数
@Frequency 60 Hz
@Frequency 60 Hz
ASTM D150
热性能额定值 (公制)额定值 (英制)测试方法
导热系数 W/m-K
@Temperature 150 °C
BTU-in/hr-ft²-°F
@Temperature 302 °F
measured on 10 mil sample
最高工作温度, Air °C °F 220°C insulation by UL
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