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BMC is the abbreviation of Bulk molding compound. The full name is unsaturated polyester fiberglass reinforced compound.
It is made up of unsaturated resin (as adhesive), e-glass fiber (as reinforced material) and various fillings and additives.
Because it is endowed with favorable electrical property, mechanical performance, heat resistance, anti corrosive, good flow property and uniformity, so it suits for products with complex structure and thin wall. It is used widely in industrial electric, household electric, electrical machine, auto accessory, architecture, articles for daily use, etc.
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1. electrical parts:
low voltage: switchboard, shell of ammeter, electric switch, junction box, switch cabinet, insulation parts
high voltage: insulator, arc chamber
2. auto parts:
dynamo reflector, lamp frame, decorating plate, speaker box
3. electrical machine parts:
air-conditioner motor, framework
4. daily use:
electric iron shell, electric iron base, sewing machine shell
5. war industry use:
connection base
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1. BMC is sealed in membrane bag, 25kg per bag, tied up and put in paper box.
2. heavy pressure, heat and wetness in transportation should be avoided.
3. better store under the temperature of 25℃, best time for use is in three months.
4. color can be dyed according to requirements, OEM welcomed.
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| SN |
property |
unit |
index |
| TC-4332 |
TC-4334 |
TC-4336 |
TC-4342 |
TC-4344 |
TC-4346 |
TC-4348 |
| common |
packing |
wearable |
mechanical |
electric |
super mechanical |
anti corrosive |
| 1 |
density |
g/cm3 |
1.75--1.95 |
| 2 |
water absorption |
mg |
≤20 |
| 3 |
molding shrinkage |
% |
≤0.30 |
≤0.15 |
≤0.10 |
| 4 |
temperature of delfection under load |
℃ |
≥220 |
≥240 |
≥220 |
| 5 |
charpy impact strength |
KJ/M |
≥20 |
≥25 |
≥28 |
≥25 |
≥30 |
≥25 |
| 6 |
flexural strength |
MPa |
≥70 |
≥90 |
≥80 |
≥100 |
≥90 |
| 7 |
insulation resistance |
Ω |
≥1.0x1012 |
---- |
≥1.0x1013 |
---- |
| 8 |
electric strength |
MV/m |
≥10.0 |
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≥12.0 |
---- |
| 9 |
dielectric dielectric constant(1MHz) |
MH2 |
≤0.015 |
---- |
≤0.015 |
---- |
| 10 |
relative dielectric constant(1MHz) |
MH2 |
≤4.8 |
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≤4.8 |
---- |
| 11 |
arc resistance |
- |
≥150 |
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≥180 |
---- |
| 12 |
proof tracking index,PTI |
V |
≥600 |
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≥600 |
---- |
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| 13 |
flammability |
S |
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FV0 |
---- |
| 14 |
long-term heat resistance temperature |
℃ |
130 |
155 |
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