Why Is High-quality Release Paper So Important for Carbon Fiber Molding?

In the processing of high-performance composite materials, carbon fiber molding has extremely high quality requirements for auxiliary materials. Among them, release paper, as a key consumable, plays an irreplaceable role in ensuring smooth demoulding, preventing resin from contaminating the mold, and improving the surface quality of the product. This article will conduct an in-depth analysis of the application value, selection criteria, performance parameters and impact of release paper on the molding process in carbon fiber molding to help companies and purchasers better understand its importance.

The role of release paper in carbon fiber molding process

Basic definition and structure of release paper

Release paper is an industrial paper with a special release coating on the surface, which is often used for demoulding materials such as resin or hot melt adhesive. Its main components include:

Substrate (usually kraft paper or PET film)

Release coating (such as silicone oil or fluoride)

Application of release paper in vacuum bag molding (VARTM)

In VARTM, RTM or prepreg autoclave molding processes, release paper can:

Prevent resin from sticking to the mold

Control the direction of resin seepage

Improve surface finish

Use of release paper with other auxiliary materials

Release paper is often used with:

Breathable cloth

Vacuum bag film

Glue-absorbing felt

To form a complete laminated structure, thereby ensuring the quality and consistency of carbon fiber product molding.

Important performance parameters and selection criteria for high-quality release paper

Selecting suitable release paper requires consideration from many aspects. The following are several key performance indicators and their descriptions:

Select the temperature resistance grade according to the molding process

If the prepreg autoclave process is used, a high temperature resistant (>200°C) PET release paper must be selected; while the conventional RTM process can use kraft paper release paper.

The selection of release force needs to be combined with the complexity of the product

For complex curved molds, a release paper with low release force must be selected to ensure smooth demolding without damaging the surface of the product.

Consider environmental protection and recyclability

Under the current trend of green manufacturing, some customers will prefer environmentally friendly and degradable release paper materials, which is also an important direction for future supply chain optimization.

Comparison of application scenarios of different types of release paper

For the convenience of selection, the following table compares several common release papers:

How to judge a high-quality release paper supplier?

Finding a suitable release paper supplier plays a decisive role in ensuring product quality and production efficiency. Here are a few key points for choosing a high-quality supplier:

Customization capability

Excellent suppliers should be able to provide customized services with different release force, width, roll diameter and other specifications to meet the needs of various composite projects.

Quality stability and batch consistency

Suppliers need to have ISO certification and third-party test reports to ensure batch stability.

Delivery cycle and service capabilities

Is fast delivery possible? Are there local or overseas warehouses? Does it support after-sales technical support?

Real customer cases and cooperation experience

Experienced suppliers know better how to deal with complex applications, such as customized needs in the fields of aerospace, sporting goods, and new energy vehicles.

Conclusion: Why can't release paper be ignored?

Although release paper is an auxiliary material, it plays a vital role in the demolding quality of carbon fiber molding, product surface integrity, mold life, etc. Choosing the right type, parameters and supplier can not only improve production efficiency, but also reduce scrap rate and rework costs.

If you are looking for a reliable release paper supplier, please contact:

Email: HarveyXu@revolve-cf.com

Official website: https://www.revolve-cf.com

Revolve CF is committed to providing professional, stable and cost-effective release material solutions for customers in the field of carbon fiber and composite materials.