TECAFORM AH ELS black

electrically active POM-C with carbon black filler, ESD

Acetal copolymer (POM-C) material modified by the addition of a special conductive carbon black is manufactured by Ensinger under the tradename TECAFORM AH ELS black. The addition of carbon black creates excellent electrical conductivity in the material. Carbon black filled POM-C offers excellent chemical resistance, high strength and hardness, and high abrasion resistance. In addition, carbon black filled POM-C has good UV and weather resistance. Having exceptional wear properties as well, makes this special acetal copolymer an ideal choice also for sliding applications. In combination with TECAFORM AH SD (POM-C with anti-static additive), these materials span the whole spectrum of conductivity from antistatic (POM SD) to static dissipative (POM esd) to conductive (POM ELS).

Facts

Chemical designation

POM-C (Polyacetal (Copolymer))

Colour

black

Density

1,41 g/cm3

Main Features

electrically conductive
high strength
good machinability
difficult to bond
good chemical resistance
high toughness
good wear properties
good UV and weather resistance

Target industries

chemical technology

electronics

mechanical engineering

automotive industry

Downloads

Datasheet (PDF)

Product handling (PDF)

Technical details

Mechanical properties

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Mechanical properties	Value	Unit	Parameter	Norm
Modulus of elasticity (tensile test)	1800	MPa	1mm/min	DIN EN ISO 527-2
Tensile strength	42	MPa	50mm/min	DIN EN ISO 527-2
Tensile strength at yield	42	MPa	50mm/min	DIN EN ISO 527-2
Elongation at yield (tensile test)	11	%	50mm/min	DIN EN ISO 527-2
Elongation at break (tensile test)	11	%	50mm/min	DIN EN ISO 527-2
Flexural strength	56	MPa	2mm/min, 10 N	DIN EN ISO 178
Modulus of elasticity (flexural test)	1500	MPa	2mm/min, 10 N	DIN EN ISO 178
Compression strength	16/25/45	MPa	1% / 2% / 5%	EN ISO 604
Compression modulus	1500	MPa	5mm/min, 10 N	EN ISO 604
Impact strength (Charpy)	74	kJ/m2	max. 7,5J	DIN EN ISO 179-1eU
Ball indentation hardness	96	MPa		ISO 2039-1

Thermal properties

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Thermal properties	Value	Unit	Parameter	Norm
Glass transition temperature	-60	C		DIN EN ISO 11357
Melting temperature	169	C		DIN EN ISO 11357
Service temperature	140	C	short term	NN
Service temperature	100	C	long term	NN
Thermal expansion (CLTE)	13	10-5*1/K	23-60°C, long.	DIN EN ISO 11359-1;2
Thermal expansion (CLTE)	14	10-5*1/K	23-100°C, long.	DIN EN ISO 11359-1;2
Thermal conductivity	0.46	W/(k*m)		ISO 22007-4:2008
Specific heat	1.3	J/(g*K)		ISO 22007-4:2008
Relative temperature index (RTI)	90	C	Impact	UL 746B

Electrical properties

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Electrical properties	Value	Unit	Parameter	Norm
volume resistivity	10³ - 10⁵	O*cm	Conductive rubber, 23°C, 12% r.h.	DIN EN 61340-2-3
surface resistivity	10² - 10⁴	O	Conductive rubber, 23°C, 12% r.h.	DIN EN 61340-2-3

Other properties

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Other properties	Value	Unit	Parameter	Norm
Water absorption	0.2	%	24h / 96h (23°C)	DIN EN ISO 62
Resistance to hot water/ bases	(+)	-		-
Resistance to weathering	(+)	-		NN
Flammability (UL94)	HB	-	corresponding to	DIN IEC 60695-11-10;