Epoxy Carbon Fiber Prepreg Suppliers

Epoxy Carbon Fiber Prepreg from a Full-Process China Factory

Jiangyin Dongli New Materials Technology Co., Ltd. is a China-based Epoxy Carbon Fiber Prepreg Suppliers that controls the entire value chain—from fiber weaving and pre-impregnation to composite molding. Our 32,000-square-meter facility in Jiangyin integrates climate-regulated workshops and 100,000-grade purification zones, ensuring consistent resin content and low void content across every batch.

We supply epoxy prepreg in unidirectional (UD) and woven formats, tailored for aerospace structures, automotive components, sporting goods, and industrial parts. As a one-stop factory, we also offer downstream molding support using autoclave, RTM, RMCP, PCM, WCM, and spraying technologies, enabling you to source material and finished parts from a single qualified partner.

Our Epoxy Prepreg Range and Application Fit

We produce epoxy prepreg based on your reinforcement and resin system requirements. The table below outlines the primary formats we manufacture and where each is typically applied.

We also supply Prepreg in cyanate ester systems for higher-temperature requirements, and we can develop custom resin formulations to meet specific mechanical or thermal targets.

Engineering Value: From Material to Finished Part

Our in-house weaving and prepreg lines allow us to control fiber tension, resin pick-up, and tack precisely. This translates into prepreg with consistent areal weight and resin content, which is critical for reproducible laminate properties. We support your project from material selection through process optimization, including:

• Resin system selection (e.g., 120°C or 180°C cure) based on your service temperature and mechanical requirements.
• Fiber architecture choice—UD, fabric, or hybrid—to optimize strength, stiffness, and impact resistance.
• Molding process recommendations: autoclave, hot press, vacuum bag, or RTM.
• Prototype development and small-series production to validate your design.

Our factory is equipped with hot presses (315T and 800T), layering equipment, and mechanical testing machines, enabling us to produce and verify test coupons from the same material batch.

Quality Assurance and Acceptance Testing

We operate under ISO 9001:2015, and our quality system covers incoming fiber inspection, resin formulation control, and final prepreg testing. Each batch is characterized for:

• Resin content (by weight)
• Volatile content
• Gel time at specified temperature
• Tack and drape properties
• Fiber areal weight

We can provide material data sheets and, upon request, test certificates from our in-house mechanical testing machine (10KN) for cured laminate properties such as tensile, flexural, and compressive strength. For critical aerospace or automotive programs, we can agree on a sampling plan and acceptance criteria before production.

Storage, Handling, and Shelf Life

Epoxy prepreg is a semi-finished product with a limited out-time at ambient temperature. We supply prepreg in sealed rolls or sheets, with clear labeling of batch number, production date, and recommended storage conditions. Typically, our epoxy prepreg requires freezer storage at -18°C for extended shelf life, and we provide handling guidelines to prevent moisture pick-up and premature cure. Our technical team can advise on thawing procedures and out-time management for your production floor.

Customization and OEM Support

We understand that off-the-shelf prepreg may not fit every application. We offer customization in the following areas:

• Resin formulation adjustments (e.g., flame retardancy, toughening)
• Fiber type and tow size (1K, 3K, 6K, 12K, 24K)
• Fabric weave pattern and width (up to 1270 mm)
• Prepreg areal weight and resin content (typically 30–45%)
• Slitting to narrow widths for automated tape laying

We also provide ODM services for composite parts, from design to production, as seen in our Lightweight Rigid Carbon Fiber Texture Takeout Delivery Box and Carbon Fiber Suitcase with Spinner Wheels.

Information We Use to Configure Your Solution

To prepare a precise quotation and technical proposal, we need the following project details:

• Application and industry: aerospace, automotive, sports, marine, or industrial
• Reinforcement type: carbon fiber grade, tow size, weave pattern, or UD
• Resin system: cure temperature, service temperature, any special requirements (e.g., flame retardant)
• Dimensions: width, length, roll weight, or sheet size
• Quantity: annual volume or per-order quantity
• Molding process: autoclave, hot press, vacuum bag, etc.
• Required certifications: material data sheets, test reports, or specific standards

With this information, we can recommend the most cost-effective prepreg configuration and, if needed, provide samples for your evaluation.

Frequently Asked Questions

What is the typical shelf life of your epoxy prepreg?

Our epoxy prepreg has a shelf life of 6 months when stored at -18°C. At room temperature (≤25°C), the out-time is typically 30 days, but we recommend using it within 10 days for optimal tack and flow. We provide detailed storage instructions with each shipment.

Can you produce prepreg with a specific resin content?

Yes, we can adjust resin content within a range of 30% to 45% by weight, depending on the fiber type and application. Our pre-impregnation line allows precise control, and we verify resin content on each batch.

Do you supply prepreg in slit widths for automated layup?

We offer slitting services to produce narrow tapes (e.g., 6.35 mm, 12.7 mm, or custom widths) suitable for automated tape laying (ATL) or automated fiber placement (AFP). Please specify your required width and tolerance.

Can you provide test data for cured laminates?

Yes, our in-house testing machine can perform tensile, flexural, and compressive tests on cured laminates. We can provide typical data or perform specific tests based on your requirements, such as ASTM or ISO standards.

What is your minimum order quantity for custom prepreg?

For custom formulations, the minimum order is typically 100 kg or 200 square meters, depending on the complexity. For standard products, we can accommodate smaller trial orders. Contact us to discuss your specific needs.