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Norplex-Micarta NP321 Cotton Fabric  (discontinued **)
Categories: Polymer; Thermoset; Phenolic
Material Notes: Description: NP321 consists of a fine weave cotton fabric (linen) impregnated with a phenolic resin binder. Applications include vanes for air and liquid pumps, and compressors. NP321 remains very flat during fabrication and in the application. Wear resistance is improved by the addition of a lubricant in the system.

Thickness Tested: 0.062", 0.125", and 0.500".
Key Words: Micarta
Vendors: Norplex-Micarta is the leading manufacturer of high performance thermoset composite materials. We work directly with customers to manufacture the highest quality specialty sheet products, pre-pregs, rods and molded shapes, and tubes to meet demanding composite applications for our OEMs and fabricators around the world. Visit norplex-micarta.com.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.30 - 1.40 g/cc
@Thickness 1.57 mm		ASTM D792
Moisture Absorption at Equilibrium 1.9 %
@Thickness 1.57 mm		ASTM D229
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell M 80 - 100
@Thickness 1.57 mm		ASTM D785
Tensile Strength, Yield 12500 psi
@Thickness 1.57 mm		CW; ASTM D638
 18500 psi
@Thickness 1.57 mm		LW; ASTM D638
Modulus of Elasticity 800 ksi
@Thickness 1.57 mm		CW; ASTM D229
 1000 ksi
@Thickness 1.57 mm		LW; ASTM D229
Flexural Strength 21300 psi
@Thickness 1.57 mm		CW; ASTM D790
 25700 psi
@Thickness 1.57 mm		LW; ASTM D790
Compressive Strength 34000 psi
@Thickness 12.7 mm		ASTM D695
Shear Strength 12000 psi
@Thickness 15.7 mm		ASTM D732
Izod Impact, Unnotched 2.20 ft-lb/in
@Thickness 12.7 mm		CW, Cond E-48/50; ASTM D256
 2.60 ft-lb/in
@Thickness 12.7 mm		LW, Cond E-48/50; ASTM D256
 
Electrical PropertiesOriginal ValueComments
Dielectric Constant 6.0
@Thickness 1.57 mm		Cond D-24/23; ASTM D150
Dielectric Strength 170 V/mil
@Thickness 1.57 mm		Cond D-48/50; ASTM D229 S.T.
 460 V/mil
@Thickness 1.57 mm		Cond A; ASTM D229 S.T.
Dielectric Breakdown 20000 V
@Thickness 1.57 mm		Cond D-48/50; ASTM D229 S/S
 51000 V
@Thickness 1.57 mm		Cond A; ASTM D229 S/S
Dissipation Factor 0.050
@Thickness 1.57 mm		Cond D-24/23; ASTM D150
Arc Resistance 133 sec
@Thickness 3.17 mm		ASTM D495
 
Thermal PropertiesOriginal ValueComments
CTE, linear 14.0 µm/m-°C
@Thickness 1.57 mm,
Temperature 20.0 °C		x-axis; IPC-TM 650-2.4.24
CTE, linear, Transverse to Flow 19.0 µm/m-°C
@Thickness 1.57 mm,
Temperature 20.0 °C		x-axis; IPC-TM 650-2.4.24
Maximum Service Temperature, Air 150 °C
Flammability, UL94 HB
@Thickness 1.57 mm
 
Descriptive Properties
Bond Strength1600 lb0.5", ASTM D229
ColorNatural, Black

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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