Date | 2026-01-02 14:12:01
When engineers search for a Bulk Molding Compound (BMC) that delivers mechanical strength, electrical safety, and manufacturing efficiency at the same time, compromise is often unavoidable.
At Wenzhou Jintong Complete Appliances Co., Ltd., we understand this challenge well. That is why we developed BMC 1620 and BMC 1625—two core grades designed to achieve a measurable, repeatable balance between performance and processability.
Rather than pursuing extreme single-property performance, these materials are developed and manufactured strictly in accordance with our Thermosetting Materials Enterprise Technical Standard (Q/JTJ0001-2025), making them reliable “all-round” solutions for general electrical and engineering components.
The performance of BMC 1620 and BMC 1625 is not based on generic claims, but on clearly defined and verifiable data, ensuring long-term safety and consistency throughout the product lifecycle.
Both grades exceed standard mechanical requirements:
BMC 1620
Flexural strength ≥ 130 MPa
Unnotched Charpy impact strength ≥ 35 kJ/m²
BMC 1625
Flexural strength ≥ 140 MPa
Unnotched Charpy impact strength ≥ 40 kJ/m²
(Tested according to Q/JTJ0001-2025)
These values ensure structural integrity under long-term load, vibration, and mechanical stress.
Electrical insulation and heat resistance are critical for BMC applications:
Dielectric strength ≥ 20 kV/mm
Arc resistance ≥ 180 s
Insulation resistance (normal condition) ≥ 1.0 × 10¹³ Ω
Temperature Index (TI) ≥ 155°C
This combination ensures electrical safety and durability in warm and demanding operating environments.
Based on Thermosetting Compression Molding Technical Conditions (Q/JTJ0002-2025), both materials offer:
Optimized flow behavior for complex cavities
Stable curing characteristics
Low shrinkage for dimensional consistency
They perform reliably within a mold temperature range of 135–170°C, supporting high yield, stable mass production, and reduced scrap rates.
While sharing the same balanced design philosophy, BMC 1620 and BMC 1625 are optimized for slightly different application needs.
BMC 1620 offers the most balanced profile across mechanical, electrical, and processing performance.
It is ideal for applications requiring stable performance and excellent cost efficiency, such as:
Standard electrical insulation components
Industrial connectors
Household appliance structural parts
Building upon BMC 1620, BMC 1625 further enhances mechanical strength and heat resistance.
Its higher flexural modulus and thermal stability make it suitable for:
Structural parts exposed to higher mechanical stress
Automotive non-high-temperature engine compartment components
Electrical equipment brackets
Coil encapsulation, contactors, solenoid valves, and housings
Choosing Jintong means more than selecting a material—it means partnering with a standard-driven manufacturing ecosystem.
Data-based confidence
Detailed performance data aligned with Q/JTJ0001-2025 supports simulation, design verification, and safety calculations.
Integrated tooling & process support
Based on Compression Molding Technical Conditions (Q/JTJ0002-2025) and Mold Manufacturing Standards (Q/JTJ0003-2025), we provide guidance on mold design, venting, draft angles, and optimized processing parameters.
Stable and consistent supply
From raw materials to finished parts, every step is controlled under a unified standard system, ensuring batch-to-batch consistency for long-term production.
If your project requires a reliable BMC material without trade-offs in strength, insulation, and manufacturability, BMC 1620 and BMC 1625 are proven choices.
📩 Contact us to request technical data, material samples, or application support.
