Polyester resin for SMC-BMC

Polyester resin SMC/BMC has low viscosity, high chemical and heat resistance, and is specifically for curing at high temperature and pressure.

What is BMC paste produced with polyester resin 771?

BMC paste is produced by combining chopped fiberglass, polyester resin, and vinyl resin with fillers, anti-shrink additives, color paste, mold release agent, and catalyst.

The chopped fiberglass in BMC paste is shorter than in SMC paste, so BMC paste mixes even better than SMC paste, allowing it to be used for more complex parts.

What are the characteristics of BMC paste (polyester resin 771)?

• Low weight / lightweight

• High electrical insulation

• Resistant to fire, heat, corrosion, weather

• Low shrinkage

• Stable dimensional control

• Suitable for small parts

What is the difference between SMC and BMC made with polyester resin?

• Both contain chopped fiberglass combined with polyester resin.

• BMC: higher fiber content, higher specific gravity, higher hardness.

• SMC: lower fiber content, lower specific gravity.

• BMC: high filler specific gravity.

• Parts made with BMC paste are cheaper and lower cost.

• SMC: long chopped fiberglass, high mechanical properties.

• BMC: short chopped fiberglass, lower mechanical properties.

What are the properties of parts made with SMC paste (polyester resin 771)?

• Light weight

• High mechanical strength

• Electrical insulation

• Resistance to fire, corrosion, heat, and weather

• Low shrinkage

• Stable dimensional control

• Uniform material thickness

• Heavy trucks and their bodies are manufactured using the SMC method.

SMC paste with polyester resin 771 is the ideal material for manufacturing large yet complex products in various SMC industries.