SMC & BMC Resin Systems
Precision Resins for Compression Molding
Delivering Class A surfaces and high mechanical strength for the automotive and electrical industries.
The Foundation of High-Performance Composites
Sheet Molding Compound (SMC) and Bulk Molding Compound (BMC) are crucial for mass-producing high-strength composite parts. The key to quality lies in the resin matrix.
Changyuan New Materials engineers advanced unsaturated polyester resins specifically for these processes. Our formulations address the critical challenges of shrinkage control, fiber wetting, and shelf-life stability.
Request SMC/BMC Resin Specs
Need a low-shrink or Class A formulation? Get a technical data sheet.
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Why Molders Choose Our Resin
Dimensional Stability
Our low-shrink formulations ensure parts maintain precise tolerances after molding.
Surface Quality
Achieve automotive Class A finish directly out of the mold, reducing painting preparation.
Fast Cycle Times
High reactivity systems allow for rapid cure times in heated compression molds.
Pigmentable
Excellent pigment dispersion for consistent color matching in molded parts.
Specialized Formulations
Class A Surface SMC Resin
Premium orthophthalic/neopentyl glycol resin designed for automotive body panels. Zero shrinkage formulation ensures mirror-like surface finish.
- Class A surface finish
- Zero shrinkage
- High heat resistance
Electrical Grade BMC Resin
High-performance resin for circuit breakers, switchgear, and insulators. Excellent electrical insulation and arc resistance.
- High dielectric strength
- UL 94 V-0 flame retardancy
- Dimensional stability
Structural SMC Resin
Tough vinyl ester or isophthalic formulations for load-bearing components like truck bumpers and under-hood parts.
- High impact strength
- Fatigue resistance
- Chemical resistance
Automotive Parts
Body panels, bumpers, headlight housings, and hood components.
Electrical & Energy
Meter boxes, switchgear cabinets, insulators, and circuit breakers.
Building & Construction
Water tank panels, manhole covers, and modular bathroom units.
Processing & Technical FAQ
Do you supply Low Profile Additives (LPA) separately?
Yes, we manufacture both base resins and compatible Low Profile Additives (polystyrene, PVAc, or PMMA based) that can be supplied separately or pre-blended to meet your specific shrinkage requirements.
What is the shelf life of your SMC resin?
Standard SMC resins have a shelf life of 3-6 months when stored below 25°C. We can adjust the inhibitor system to provide longer stability for export shipments or specific processing windows.
Can your resin be used for both SMC and BMC?
While some base resins are versatile, SMC and BMC typically require different viscosity profiles. SMC resins usually have lower viscosity for fiber wetting, while BMC resins can be higher. We recommend specific grades for each process to ensure optimal performance.
Do you offer flame retardant options for BMC?
Yes, we have halogenated and non-halogenated flame retardant resin systems designed to meet UL 94 V-0 standards for electrical BMC applications.
Elevate Your Molding Quality
Request a sample of our low-shrink SMC resin and see the Class A difference.