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DOUGH MOULDING COMPOUND

DMC is a fiberglass reinforced, ready to use molding material. The molding composition is based on specially tailored low profile Polyester resin, fiberglass reinforcement, fillers & special additives. Some important characteristics which can be achieved while using DMC are:
• Excellent Electrical Properties.
• Low Molding Shrinkage.
• Heat & Flame Resistance.
• Fast cure.
• Good Flow.
• High Impact Strength.
• Better Dimensional Stability.
• Low Water Absorption.
DMC is best suited for compression molding, however it is also used by transfer molding.

PROPERTIES	UNIT	VALUE
PHYSICAL PROPERTIES
Appearance		Fibrous dough
Specific Gravity	Gms / ml	1.85 – 1.95
Shrinkage	Mm / mm	0.002 – 0.003
Water Absorption	%	<0.20
MACHANICAL PROPERTIES
Tensile Strength	Kg / cm	350 – 450
Impact Strength	Kg / cm	25 – 35
Cross Breaking Strength	Kg / cm	850 – 1000
ELECTRICAL PROPERTIES
Volume Resistivity	Log10ohm.cm	13 + 1
Surface Resistivity	Log10ohm	12 + 1
Arc Resistivity	Secs.	180
Tracking Index	Volts.	600
Electrical Strength @ 90 c	KV / mm	10 + 1
MOULDING CONDITIONS
Pressure	Kg / cm	100 – 300
Temperature	C	140 - 150
REINFORCEMENT CONTENT
Glass Content	%	15 - 25

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