Poliaramida ( Polymetaphenylene isophthalamide )

Informazioni sul Materiale

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Fibra	Fibra in pezzi	Film	Lamina	Struttura a nido d'ape

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Common Brand Names:
DuPont™ Nomex®

General Description:
General Description : An infusible, wholly aromatic polymer that can strictly be described as nylon I,I - but rarely is. Manufactured only as a fibre (by solution spinning), it has a very high thermal stability andtemperature and flame resistance. In contrast to its chemical isomer DuPont™ Kevlar®, its tensile properties are similar to those of normal textile fibres but its hydrolysis resistance in hot wet conditions is better(than DuPont™ Kevlar®). Its radiation resistance is also very good. The fibre is converted into a number of fibre-based forms, including : calendered and uncalendered papers, pressboards of three different densities and honeycomb. The last is made from DuPont™ Nomex® paper coated in a phenolic resin. Other forms include felts. Applications include protective clothing (e.g. for firefighters andracing drivers), process equipment and insulation and filtration media. Explanation of Type numbers T410 Calendered Paper T411 Un-calendered Paper T418 Calendered Paper, containing 50% mica T992 Low Density Pressboard T993 Medium Density Pressboard T994 High Density Pressboard DuPont™, Nomex® are registered trademarks of E.I. du Pont de Nemours and Company”.

Chemical Resistance

Electrical Properties

Mechanical Properties

Physical Properties

Density ( g cm^-³ )	1,38
Limiting oxygen index ( % )	29
Radiation resistance	Good
Water absorption - equilibrium ( % )	9
Water absorption - over 24 hours ( % )	0,08

Thermal Properties

Coefficient of thermal expansion ( x10^-⁶ K^-¹ )	20
Heat-deflection temperature - 1.8MPa ( C )	149
Specific heat ( J K^-¹ kg^-¹ )	1200
Thermal conductivity @23C ( W m^-¹ K^-¹ )	0,13
Upper working temperature ( C )	200 - 300

Properties for Poliaramida Fibre

Properties for Poliaramida Fibre a Pezzi

Properties for Poliaramida Film

Property		Value
Material		T410	T411	T418
Density	g cm^-³	0,72-1,05	0,3	1,1
Dielectric Constant @ 60Hz		1,6 - 3,4	1,2	2,5
Dielectric Strength @130µm thick	kV mm^-¹	17-55	9-18	33-63
Dissipation Factor @60Hz		0,004-0,007	0,003	0,003
Elmendorf Tear Strength	N mm^-¹	14-39	7	14-22
Extension to break - Longitudinal	%	11-22	3	2,5
Extension to break - Transverse	%	8-17	5	2,5
Initial Tear Strength	g µm^-¹	12-32	2-4	6-10
Limiting Oxygen Index	%	29-32	29	63
Shrinkage @300C	%	0,3-2		0,2-0,3
Tensile strength - Longitudinal	MPa	85-130	6	40
Tensile strength - Transverse	MPa	35-75	3	30
Thermal Conductivity @23C	W m^-¹ K^-¹	0,1-0,16

Properties for Poliaramida Lamine

Property		Value
Material		T992	T993	T994
Density	g cm^-³	0,5	0,83	1,14
Dielectric Constant @ 60Hz		1,7	~3,5	~4,4
Dielectric Strength @3mm thick	kV mm^-¹	15-32	~33-66	~25-70
Dissipation Factor @60Hz		0,02	~0,09	~0,02
Extension to break - Longitudinal	%	3	5,5
Extension to break - Transverse	%	4	7
Limiting Oxygen Index	%	29	32
Tensile strength - Longitudinal	MPa	14,5	56	120
Tensile strength - Transverse	MPa	11	32	70
Thermal Conductivity @23C	W m^-¹ K^-¹	0,07

Properties for Poliaramida Strutture a nido d'ape

Property		Value
Cell Size	mm	6	5	3	5
Compressive Strength	MPa	0,7	1,1	2,2	3,8
Core Density	g cm^-³	0,024	0,032	0,048	0,064
Plate Shear Modulus - Longitudinal	MPa	25	34	52	70
Plate Shear Modulus - Transverse	MPa	14	20	29	35
Plate Shear Strength - Longitudinal	MPa	0,7	1,1	1,8	2,5
Plate Shear Strength - Transverse	MPa	0,35	0,6	0,9	1,1
Wall Thickness	mm	0,05	0,05	0,05	0,08

Buy Poliaramida on-line

Standard products are available in these forms


Fibra	Fibra in pezzi	Film	Lamina	Struttura a nido d'ape

Choose a form to search our on-line catalogue