Specification
SMC/BMC(DMC) composite manhole cover
1.EN 124 certificate.
2.W-SMC sheet patent.
3.Best quality in China.
4.OEM and ODM as demands
What is SMC?
Sheet Molding Compound (SMC) is a compression molding compound often used for larger parts where higher mechanical strength is needed. SMC is a fiber reinforced thermoset material. As with BMC, thermoset Sheet Molding Compound (SMC) is a mixture of polymer resin, inert fillers, fiber reinforcement, catalysts, pigments and stabilizers, release agents, and thickeners and possesses strong dielectric properties.
Sheet Molding Compound (SMC) is a mineral filled, fiberglass reinforced polyester (vinyl ester and phenolic) based molding compound. SMC is a thermosetting material that undergoes an irreversible cross-linking reaction when exposed to the heat and pressure of the thermoset molding process (i.e. ambient delivery of material to a heated molding surface).A somewhat tacky, dough-like mass in its unmolded state, SMC is covered to an infusible, solid state using injection, compression and transfer methods.
Specification of SMC-2
|
|
Physical properties |
UNIT |
4343 SMC-2 |
|
1 |
Specific gravity |
g/cm3 |
1.75—1.95 |
|
2 |
Water absorption |
mg |
≤20 |
|
3 |
Shrink rate |
% |
≤0.15 |
|
4 |
Heat deflection temperature |
°C |
≥240 |
|
5 |
Izod impact strength notched |
KJ /m2 |
≥60 |
|
6 |
Flexural strength |
MPa |
≥150 |
|
7 |
Insulation resistance |
Ω |
≥1.0×1013 |
|
8 |
Dielectric strength (at 90°C in oil) |
MV/m |
≥12 |
|
9 |
Dielectric loss factor (at 1 MHz ) |
|
≤0.015 |
|
10 |
Dielectric constant ((at 1 MHz ) |
|
≤4.5 |
|
11 |
Surface resistivity |
S |
≥180 |
|
12 |
Tracking resistivity (PTI) |
V |
≥600 |
|
13 |
Flammability |
|
FV0 |
|
14 |
Long term heat resistance temperature |
|
155 |
Features of smc manhole covers:
1. Anti-theft: this product is made of polymer composites by heat mould pressing, no recovery value.
2. Convenience and artistic appearance: the weight is only one third that of the iron one with the same spec, so it is easy to install and maintain, besides it can be designed according to customers requirement.
3. Long service life: acid and alkali resistance, no rust, electrical insulation, abrasion resistance and weather resistance. And the service life is over 30 years.
4. High precision: this product is made by high temperature mould pressing, the gap between the base and the cover is small, it over comes the issue of running, jumping and sounding which happened on the cast-iron, cement ones. Composite material manhole cover is also widely applied in new factory construction and distribution room for cable cover.
5. Free design
Are you tired of finding approriate and credit supplier in china?
As one of the largest and most professional manufacturer and exporter specialized in SMC/BMC composites&its products, such as SMC BMC composites electrical manhole cover in China, Hangzhou Wellborn Composites Co., Ltd assure you that we can supply products with the most competitive price, best quality and service. 27-year-experience, AAA Credit Enterprise, China Famous Brand, attend all kinds of Exhibitions around the world, we can make a difference. Welcome to visit our factory, ZHEJIANG YUEQING RESIN MANUFACTURE FACTORY.
Hangzhou Wellborn Composites Co., Ltd is a leading SMC/BMC materials supplier in China, an export department of ZHEJIANG YUEQING RESIN MANUFACTURE FACTORY (founded in 1988). We focus on providing quality BMC (DMC) and SMC series molding compound and related product such as SMC manhole, mater box. Our company founded in 1988, with rich experience of manufacturing and handling BMC (DMC) and SMC and complete source and QC system. Our clients include CHINT, Delixi, Schneider, ABB, Siemens, Toshib, Mitsubishi and so on.
