Changing Demands for Low-VOC Release Agents in the Carbon Fiber Composite Industry

# Introduction:

For years, the carbon fiber composite industry has widely adopted high-VOC solvent-based mold release agents due to their excellent demolding performance and cost advantages, covering sports equipment, automotive lightweight parts, wind energy components, and aerospace composite manufacturing.

However, continuous upgrades of EU REACH directives, global VOC regulations, and U.S. EPA standards have redefined industry entry thresholds. Overseas buyers no longer focus solely on demolding effect and unit price. Non-compliant high-solvent products now face risks such as customs detention and supplier audit failure.

Low-VOC mold release agents have shifted from a competitive advantage to a mandatory requirement for export orders. Meanwhile, stricter domestic environmental supervision is accelerating the elimination of high-VOC formulations, triggering a full industry transition to eco-friendly release systems.

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# 1. Significant Changes in Customer Evaluation Criteria

Traditional procurement priorities focused on three factors: pure demolding performance, competitive price, and compatibility with epoxy resin or vinyl resin systems. Current overseas buyers have added strict compliance indicators as core judgment standards:

1.1 Priority on actual VOC test data

Buyers no longer accept verbal low-VOC claims. They require clear VOC values marked on official TDS and authoritative third-party test reports for supply chain verification and filing.

1.2 Balance of surface quality and post-processing performance

The biggest pain point of water-based low-VOC release agents is residual contamination. Overseas composite manufacturers strictly prohibit surface stains, haze, or oil marks after demolding. More importantly, the agent must not weaken subsequent bonding and painting strength — this has become a critical rejection indicator for product selection.

1.3 Strict chemical compliance verification

EU export orders universally inspect SVHC substances, PFAS prohibition, and benzene-free solvent formulas. Most overseas inquiries prioritize SDS and compliance declarations before requesting samples or quotations.

1.4 Focus on comprehensive production cost rather than unit price

Although low-VOC products have a higher purchase price, they support multiple demolding cycles per coating and reduce mold cleaning frequency. Professional overseas customers calculate overall production efficiency and are willing to pay premiums for stable, compliant, low-failure eco-friendly products.

In short, the new overseas inquiry logic is: compliance documents first, performance verification second, price comparison last. Suppliers without complete compliance credentials will lose sample testing opportunities directly.

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# 2. Iteration of Composite Release Agent Material Systems

The industry’s material structure is undergoing a comprehensive upgrade driven by environmental policies:

2.1 Phase-out of solvent-based high-VOC products

Traditional formulas containing toluene, xylene and other volatile solvents are gradually restricted in European and American markets. Remaining applications are mostly limited to non-export low-end production lines.

2.2 Water-based low-VOC agents become the mainstream replacement

Water-carried formulas drastically reduce VOC emissions and meet global environmental standards. The core technical challenge is optimizing formulas to adapt to carbon fiber epoxy resin systems, avoiding water traces, surface defects and residual adhesion issues.

2.3 Rising demand for low-VOC semi-permanent release agents

Compared with traditional sacrificial release agents, semi-permanent types realize multiple demolds with one coating, effectively reducing chemical consumption and workshop volatile emissions. Demand is growing rapidly in wind energy and automotive composite sectors.

2.4 Synchronized growth of silicone-free and low-migration requirements

Most carbon fiber parts require subsequent bonding and spraying. Silicone residue will cause peeling and coating failure. Therefore, overseas inquiries frequently combine two core requirements: low-VOC + silicone-free.

It is worth noting that early low-VOC products have inherent limitations, such as higher demolding force and high sensitivity to temperature and humidity. Production lines cannot simply copy solvent-based construction processes and require professional technical guidance.

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# 3. Impacts on Composite Factory Production Management

Switching to low-VOC release agents is not a simple product replacement — it changes the entire production operation system:

3.1 Updated construction standards

Water-based low-VOC formulas require sufficient drying and film-forming time. Workshop temperature, humidity and ventilation directly affect demolding quality, making traditional solvent-based operation experience inapplicable.

3.2 Adjusted mold cleaning and maintenance system

Matching low-VOC cleaning agents are required synchronously. Mixing high-VOC cleaners will offset environmental upgrade effects. Factories need to retest cleaning cycles and supporting auxiliary materials.

3.3 Lower warehouse safety risks with refined storage management

Most water-based low-VOC products are non-dangerous goods, reducing fire storage pressure. Meanwhile, sealed storage and anti-freezing measures are necessary to prevent liquid delamination and formula failure.

3.4 Full supply chain compliance traceability

International brands implement upstream chemical traceability management. Downstream composite factories require suppliers to provide complete English-version SDS, TDS, VOC test reports and compliance declarations for supplier qualification filing.

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# Conclusion: Core Preparations for Release Agent Suppliers in the Next 1–2 Years

Facing the accelerating global low-VOC replacement trend, export suppliers need to complete strategic layouts in advance:

1. Classify and optimize product lines

Distinguish ordinary industrial models from export-grade low-VOC dedicated models. Prioritize upgrading water-based, silicone-free and semi-permanent composite release agents compatible with mainstream epoxy and vinyl resin systems.

2. Complete full set of export compliance documents

Prepare standardized English SDS, TDS, third-party VOC test reports, and REACH-SVHC compliance statements to respond instantly to overseas customer audits.

3. Build professional process database

Summarize demolding performance under different mold temperatures, coating methods and drying cycles, providing standardized technical guidance for overseas customers to reduce trial-and-error costs.

4. Standardize sample testing procedures

Formulate clear sample delivery and testing standards focusing on demolding effect, surface finish, post-bonding performance and VOC indicators, improving customer cooperation efficiency.

In the next two years, global carbon fiber composite manufacturers will complete large-scale elimination of high-VOC solvent-based products. Suppliers with mature low-VOC formulas and complete compliance systems will seize the huge incremental export market opportunities.