Premium Release Liners for the Composite Industry: Precision Solutions for High-Performance Materials
Successfully manufacturing composite parts—whether for aerospace, automotive, or sporting goods—depends heavily on the carrier material. At YINGFEI, we engineer specialized PET release films and technical release papers that ensure the perfect cure, consistent release, and flawless surface finish for your carbon fiber and fiberglass products.
Solving Your Toughest Composite Manufacturing Challenges
The composite industry faces unique hurdles. “Standard” release materials often fail under pressure. We designed our product line to address the core pain points of B2B manufacturers
Resin Compatibility
Preventing "fiber pull-out" or "prepreg sticking" by matching the chemical release force to your specific resin system (Epoxy, Phenolic, or Polyester).
Thermal Stability
Ensuring the liner remains dimensionally stable and does not warp or melt during high-temperature autoclave or oven curing.
Surface Perfection
Eliminating "pinholes" or "orange peel" textures on the finished composite part through ultra-smooth coating technology.
Contamination Control
Using 10,000-class cleanroom production to ensure zero dust or silicone migration, which can compromise structural bonding.
Specialized Release Solutions for Composite Processes
Every manufacturing method requires a different carrier. YINGFEI provides factory-direct, customized solutions for
Prepreg Production (Carbon Fiber & Fiberglass)
In the production of unidirectional (UD) or woven prepregs, the liner must act as a stable carrier and a protective barrier.
- Recommended: Our CCK (Clay Coated Kraft) Release Paper and PET Release Film.
- Key Benefit: High tensile strength and heat resistance ensure the prepreg remains flat and easy to handle during the layup process.
Vacuum Bagging & Resin Infusion (VARIM/VARTM)
Large-scale parts like wind turbine blades or boat hulls require liners that can withstand vacuum pressure without leaking.
- Recommended: PE Coated Laminated Paper and Multilayer Barrier Films.
- Key Benefit: Excellent moisture resistance and airtightness prevent resin starvation and ensure a uniform vacuum seal.
Film Casting & Structural Adhesives
For manufacturers of epoxy adhesive films used in composite bonding.
- Recommended: Fluorine-Coated PET Film or Differential Release Paper (different release force on each side).
- Key Benefit: Precise release control allows the adhesive film to be transferred perfectly to the substrate without residue.
Technical Specifications & Customization for B2B Wholesale
As a direct manufacturer, YINGFEI offers flexibility that trading companies cannot match. We provide tailored specifications for high-volume industrial needs.
Material Diversity for Every Composite Application
| Material Type | GSM / Thickness | Available Colors | Heat Resistance |
| PET Release Film | 12μm – 188μm | Clear, Blue, Red, Matte | Up to 180°C |
| Glassine Paper | 40g – 120g 40克 – 120克 | White, Yellow, Blue | High Density |
| CCK Release Paper | 80g – 150g 80克 – 150克 | White, Cream | Dimensional Stability |
| PE Coated Paper | 30g – 300g 30克 – 300克 | White, Yellow, Kraft | Moisture Barrier |
Custom Slitting and Processing
Precision Width
We offer high-speed slitting from 15mm to 1650mm.
Surface Treatment
Options for single-sided or double-sided silicone coating, as well as specialized non-silicone or fluorine coatings for specific resin systems.
Printing
Custom grid lines or branding can be printed on the backing paper for easier cutting and alignment during manual layup.
Why Partner with YINGFEI for Your Composite Supply Chain?
Dust-Free Manufacturing Excellence
Our PET release films are produced in a Class 10,000 cleanroom. For the composite industry, this prevents microscopic particles from being trapped in the resin, which is critical for structural integrity in aerospace components.
Quality Consistency & Testing
Every batch undergoes rigorous testing for Release Force (g/25mm), Residual Adhesion, and Tensile Strength. We ensure that the 1,000th meter of your roll performs exactly like the 1st.
Global Wholesale & Logistics
Located in Guangzhou, we leverage world-class logistics to provide international shipping for B2B clients. We offer competitive wholesale pricing for container-load orders while maintaining the flexibility to provide free samples for R&D testing.
Frequently Asked Questions (FAQ) for Composite Liners
For most epoxy systems, a silicone-coated PET film or CCK paper is ideal. However, for high-performance resins like BMI, a fluorine-treated film may be required to ensure clean release.
Yes. Our high-temperature PET films and CCK papers are designed to withstand standard curing cycles (typically 120°C to 180°C) without degradation or silicone transfer.
As a manufacturer, we balance production efficiency with customer needs. Please contact our sales team with your specific width requirements for a tailored quote.
Ready to Optimize Your Composite Production?
Don’t let a sub-par release liner ruin an expensive carbon fiber layup. Partner with YINGFEI, the professional choice for Release Paper and Film manufacturing.
Contact us today for a technical consultation or to request a sample pack for your specific resin system.
Request a Quote Now
Our Commitment to You
Contact Information
-
Email
sales@yingfei.com -
Phone/WhatsApp
+86-18933941186 -
Factory Location
Beside the Jiangkou Sluice in Xiawei Village, Shitan Town, Zengcheng District, Guangzhou City