Melamine NP329 Sheet – High‑Performance, Arc‑Resistant Melamine‑Coated Linen

Bleached linen with melamine resin system. NP329 provides better arc resistance than NP320E. Also, resistant to ammonia based refrigerants. Hard, durable material should be heated to punch, but machines very well with standard machining equipment.

Properties

General

Property	Value	Testing Standard	Comment
Bonding strength	635 Kg	ASTM D229	Condition D-48/50
	725.7 Kg	ASTM D229	Condition A
Density	1.47 g/cm³	ASTM D792
Moisture absorption	3.6 %	ASTM D570	Condition D₁-24/23

Mechanical

Property	Value	Testing Standard	Comment
Compressive strength	303.4 MPa	ASTM D695	Condition A \| Flatwise
Elastic modulus	10.3 GPa	ASTM D638	Condition A, Transverse
	17.9 GPa	ASTM D638	Condition A
Flexural modulus	7.6 GPa	ASTM D790	Condition A, Transverse
	11.7 GPa	ASTM D790	Condition A
Flexural strength	175.8 MPa	ASTM D790	Condition A, Transverse
	222 MPa	ASTM D790	Condition A
Hardness, Rockwell M	95 [-]	ASTM D785
Impact strength, Izod unnotched, ASTM	69 J/m	ASTM D256	Condition E-48/50, Transverse
	96 J/m	ASTM D256	Condition E-48/50
Shear strength	179.3 MPa	ASTM D732	Condition A, Transverse
Tensile strength	166.2 MPa	ASTM D638	Condition A

Thermal

Property	Value	Testing Standard	Comment
Coefficient of thermal expansion	1.8e-05 1/K	IPC-TM 650-2.4.24
	1.9e-05 1/K	IPC-TM 650-2.4.24	Transverse
Relative temperature index, mechanical strength	130 °C		UL Bulletin 746b¹
Arc resistance	135 seconds, ASTM D495, Condition A
Flammability	UL Bulletin 94, Class HB, Condition A

Electrical

Property	Value	Testing Standard	Frequency	Comment
Breakdown voltage	9 kV	ASTM D149		Condition D48/50
	65 kV	ASTM D149		Condition A
Comparative tracking index	200 V	ASTM D3638
Dielectric constant	7.2 [-]	ASTM D150	1MHz	Condition A
	8.6 [-]	ASTM D150	1MHz	Condition D-24/23
Dielectric strength	3.94 kV/mm	ASTM D149		Condition D-48/50
	14.96 kV/mm	ASTM D149		Condition A
Dissipation factor	0.07 [-]	ASTM D150	1MHz	Condition A
	0.09 [-]	ASTM D150	1MHz	Condition D-24/23

Technological properties

Property
Fillers	Cotton Fabric
Other	1.This temperature is a recommendation only, and based upon experience in various applications. The maximum operating temperature is dependent upon the application and should be investigated prior to use.
Supplier Disclaimer	This data, while believed to be accurate and based on reliable analytical methods, is for informational purposes only. The terms and conditions of the agreement under which it is sold will govern any sales of this product. Data supplied above are "typical values"; not to be considered "specification values". To assure the material's performance is adequate for a specific application; customers should verify, independent of Norplex-Micarta, performance characteristics of interest. It is the responsibility of the users of this information to make sure that they have the latest version of this TDB, and are urged to check with Customer Service or, preferably our web site, www.norplex-micarta.com, to determine if the information is the most current available.

Property

Fillers

Cotton Fabric

Other

1.This temperature is a recommendation only, and based upon experience in various applications. The maximum operating temperature is dependent upon the application and should be investigated prior to use.

Supplier Disclaimer

This data, while believed to be accurate and based on reliable analytical methods, is for informational purposes only. The terms and conditions of the agreement under which it is sold will govern any sales of this product. Data supplied above are "typical values"; not to be considered "specification values".

To assure the material's performance is adequate for a specific application; customers should verify, independent of Norplex-Micarta, performance characteristics of interest.

It is the responsibility of the users of this information to make sure that they have the latest version of this TDB, and are urged to check with Customer Service or, preferably our web site, www.norplex-micarta.com, to determine if the information is the most current available.

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