SMC (UL Certification) Sheet Molding Compound

SMC is a kind of sheet molding material made of resin paste impregnated fiber or chopped fiber felt covered with polyhexene film on both sides. It has electrical insulation, heat resistance, flame retardant, good mechanical strength and other properties, as well as light weight and easy engineering design, flexible and other advantages, its mechanical properties can be comparable to some metal materials, so widely used in transport vehicles, construction, electronics, electrical and other industries.

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Product Standard

ISO, NEMA, IEC, DIN, JIS

product Specification

SMC (UL Certification) Sheet Molding Compound
Dimensions (LxW)	1000*1200	MM
	1010*2010	MM
	1250*2500	MM
Density	1.81	g/cm³
Electric strength perpendicular to laminations (in oil, 90±2℃)	13	kV/mm
Voltage resistance(in oil, 90±2℃ 5 min)	PASS	kV
Insulation resistance after 24 h water immersion, D-24/23	7.6×10¹¹	Ω
Water absorption rate	23	mg
Arc resistance	182	s
Comparative tracking index (CTI)	600	V
Flammability (1 mm in thickness)	V-0	CLASS
Temperature of deflection under load (method A)	240	℃
100 Hz dielectric constant	4.41	-
100 Hz dielectric loss factor	0.008	-

Material: unsaturated polyester resin, Chopped coarse sand or raw silk

Color & Logo: White, red, grey, brown, dark-red

Product Application

SMC can be used in 8PT cabinet. It has the following advantages:

Corrosion Resistance and Environmental Aging Resistance
8PT cabinets are often used in chemical, coastal, or high-humidity environments where traditional metal cabinets are prone to rust and require frequent maintenance. SMC, as an inorganic composite material, contains no metal components and exhibits excellent resistance to acids, alkalis, and salt spray (experimental data shows that SMC withstands 480 hours in a 5% NaCl salt spray without blistering or peeling). It also resists UV aging (with added specific fillers, its service life can exceed 20 years).

Lightweight Design and Structural Strength
SMC has a density of 1.8-2.0 g/cm³, only 1/4 that of steel and 2/3 that of aluminum. Through compression molding, reinforcing ribs and integrated structures can be designed, achieving a flexural strength of 150-250 MPa, comparable to ordinary steel. This meets the mechanical strength requirements of 8PT cabinets (e.g., impact and deformation resistance).

Insulation and Electromagnetic Shielding (Enhancing Electrical Safety)
SMC boasts a volume resistivity >10^13 Ω·cm and a dielectric strength >15 kV/mm, providing inherent insulation to prevent leakage risks. By incorporating conductive particles (e.g., carbon fibers), customizable electromagnetic shielding (30-60 dB) can be achieved, meeting the anti-interference needs of sensitive components like inverters and PLCs in 8PT cabinets.

SMC-8PT cabinet accessories