Polyaramid Disk (Polymetaphenylene isophthalamide)

Polyaramid Disk offers exceptional tensile strength, heat resistance, and low weight in a precisely machined circular format. The material’s high-performance aromatic polyamide structure provides stability under thermal cycling and mechanical stress, while the disk geometry ensures consistent surface contact in gaskets, seals, and impact-resistant inserts. Industries including aerospace, defense, and automotive employ polyaramid disks in ballistic shielding components, heat-insulating barriers, and vibration-dampening systems. In research, they are used for studying composite bonding behavior, laser machining optimization, and thermal barrier coatings. The disk’s combination of dimensional accuracy, inherent flame resistance, and lightweight strength ensures dependable performance in both high-specification engineering systems and advanced experimental setups.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Disc

Thickness		±20%

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Poor
Acids - dilute	Good-Fair
Alcohols	Good
Alkalis	Good-Poor
Aromatic hydrocarbons	Good
Greases and Oils	Good
Halogenated Hydrocarbons	Good
Ketones	Good

Electrical Properties

Element	Value
Dielectric constant @1kHz	2.3
Dielectric strength( kV mm⁻¹ )	32
Volume resistivity( Ohmcm )	6x10¹⁶

Physical Properties

Element	Value
Radiation resistance	Good
Limiting oxygen index( % )	29
Water absorption - equilibrium( % )	9
Water absorption - over 24 hours( % )	0.08
Density( gcm⁻³ )	1.38

Mechanical Properties

Element	Value
Elongation at break( % )	9
Izod impact strength( J m⁻¹ )	533unnotched
Tensile strength( MPa )	1800-3900

Thermal Properties

Element	Value
Heat-deflection temperature - 1.8MPa( C )	149
Upper working temperature( C )	200-300
Specific heat( J K⁻¹ kg⁻¹ )	1200
Thermal conductivity( W m⁻¹ K⁻¹ )	0.13@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	20