SMC SJ3004-1 Sheet Molding Compound

Kaerda SMC SJ3004-1 is a structural-grade flame-retardant Sheet Molding Compound containing 26±2% glass fiber and achieving a UL-94 V0 rating. Formulated for heavy-duty cable support brackets in tunnels, subway systems, and utility trenches, it features high load-bearing flexural strength (≥155 MPa) and zero corrosion degradation.

Key Highlights: Glass Fiber Content: 26±2% | Density: 1.75-1.85 g/cm³ | Flame Retardancy: V0 | HDT: ≥200°C | Shrinkage: ≤0.12%

Key Technical Specifications

Property Test Standard Unit Value
Density GB/T1463 g/cm3 1.75-1.85
Water Absorption GB/T1462 mg ≤20
Shrinkage Rate GB/T15568 % ≤0.12
Glass Fiber Content GB/T15568 % 26±2
Heat Deflection Temperature (HDT) GB/T1634 ℃ ≥200
Tensile Strength GB/T1447 Mpa ≥60
Flexural Strength GB/T1449 Mpa ≥155
Impact Strength GB/T1451 KJ/㎡ ≥60
Limiting Oxygen Index GB/T 2406.2 % ≥33
Flame Retardancy UL-94 Grade V0

Product Features & Engineering Performance

  • · Excellent dimensional stability with molding shrinkage ≤0.12%, less deformation after molding and high assembly precision for supports.
  • · Outstanding mechanical properties: glass fiber content 26±2%, tensile strength ≥60MPa, flexural strength ≥155MPa, impact strength ≥60kJ/m², featuring strong load-bearing capacity and good impact resistance.
  • · Good heat resistance with heat deflection temperature ≥200℃, maintaining structural stability under high-temperature conditions.
  • · High flame safety performance, UL94 V-0 flame retardancy and limiting oxygen index ≥33%, greatly improving fire safety for cable laying.
  • · Low water absorption, reliable insulation, acid & alkali resistance and anti-aging property; non-conductive without electrochemical corrosion.
  • · Suitable for integral compression molding. Lightweight and rust-free compared with metal brackets, ideal for humid, chemical, underground utility tunnels and other harsh environments.

Applications & Component Suitability

It is widely used for cable brackets, cantilevers and supporting components in utility tunnels, tunnels, power plants, subways, chemical plants and cable trenches. With high load capacity, insulation, flame retardancy and corrosion resistance, it stably supports cables and adapts to harsh environments with humidity, corrosion and high temperature. A: It is widely used for cable brackets, cantilevers and supporting components in utility tunnels, tunnels, power plants, subways, chemical plants and cable trenches. With high load capacity, insulation, flame retardancy and corrosion resistance, it stably supports cables and adapts to harsh environments with humidity, corrosion and high temperature. Q: Can you adjust specifications based on project needs? A: Yes. The parameters shown on the page are representative references, and selected projects can be discussed for adaptation and development. Q: Can you provide samples for testing? A: Yes. Sample testing, TDS / MSDS requests, and early-stage technical evaluation are supported. Q: Do you support long-term bulk supply? A: Yes. The product is supported by real production lines and equipment, making it suitable for stable supply and long-term project cooperation. Q: Can you also support molded product development?

Manufacturing Infrastructure & Quality Control

Kaerda supports full-scale production from customized compounding to finished molded parts with ISO 9001 and IATF 16949 quality compliance:

  • 3 High-Capacity SMC Production Lines: Ensuring precise resin-to-fiber distribution and consistent lot-to-lot maturation.
  • 15 Compression Molding Presses (315T – 2500T): Capable of producing large-format, high-density composite enclosures and structural parts.
  • Integrated Testing Lab: Full testing for tensile/flexural strength, heat deflection temperature (HDT), shrinkage, and UL-94 flame retardancy.

Frequently Asked Questions

It is widely used for cable brackets, cantilevers and supporting components in utility tunnels, tunnels, power plants, subways, chemical plants and cable trenches. With high load capacity, insulation, flame retardancy and corrosion resistance, it stably supports cables and adapts to harsh environments with humidity, corrosion and high temperature. A: It is widely used for cable brackets, cantilevers and supporting components in utility tunnels, tunnels, power plants, subways, chemical plants and cable trenches. With high load capacity, insulation, flame retardancy and corrosion resistance, it stably supports cables and adapts to harsh environments with humidity, corrosion and high temperature. Q: Can you adjust specifications based on project needs? A: Yes. The parameters shown on the page are representative references, and selected projects can be discussed for adaptation and development. Q: Can you provide samples for testing? A: Yes. Sample testing, TDS / MSDS requests, and early-stage technical evaluation are supported. Q: Do you support long-term bulk supply? A: Yes. The product is supported by real production lines and equipment, making it suitable for stable supply and long-term project cooperation. Q: Can you also support molded product development?

Yes. Kaerda operates an in-house polymer formulation lab and 3 automated SMC production lines. We can adjust glass fiber length and loading, cure kinetics, shrinkage control, and RAL color matching according to your tooling and mechanical requirements.

Absolutely. We provide full TDS/MSDS documentation and batch material samples for initial mold sampling, shrinkage validation, and mechanical testing.

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