SHD Prepreg composite material
Bio-Content prepreg

FR308

Flame Retardant, Bio-based

Key Features & Benefits

Key Feature 99% bio-based. Highly flame retardant. Replaces phenolic resins. CS 25.853 compliant and EN45545-2 HL3 rated
Application Bio-based, highly flame retardant system for interior structures, typically to replace phenolic resins
Initial Cure Temp 210°F- 265°F
Initial Cure Time 3 Hours- 1 Hours
Post Cure Option Consult SHD
Outlife 21 days at 70°F
TG Onset* 288°F -DMA
TG Peak* 358°F -DMA
Toughened Yes
Cure Autoclave and Press
Availability All sites

FR308 prepreg is a flame retardant resin system meeting the flame, smoke and toxicity (FST) requirements of aerospace standard CS 25.853 and rail standard EN 45545. It can be supplied on a variety of fabrics to meet your cost and manufacturing requirements. This resin system colour is dark brown / black.

Why choose this material

Derived from a bio-based waste feedstock with expectional FST characteristics, FR308 is ideal for mass transport interiors in both aerospace and rail. A phenolic replacement system with none of the traditional risk phrases associated with phenolics.

Supplied with SHD's renowned service, including:

  • Short two-week lead times and low MOQs

  • Exceptional product quality

  • First class technical support

  • Excellent customer service

  • The same manufacturing equipment and processes across all sites

Advanced composite solutions for aerospace (passenger plane seating)

Recommended markets

Aerospace

Advanced composites specified across major commercial aircraft today
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Technical Guidance Information

01

Storage and Out Life

This material should be kept frozen at -18°C (0°F) for a maximum storage life. If kept refrigerated at 6°C storage life will be reduced to 2 months. It must be kept sealed in a polythene bag which must not be opened until fully thawed to room temperature. If the material is not fully used, then the material must be resealed in the polythene bag to prevent moisture absorption.

02

Health and Safety

Please refer to the product Safety Data Sheet before using this material.

The following precautions must be taken when using PFA resin prepregs:

  • Impervious gloves are recommended

  • To avoid exotherm, particular care must be taken with thick laminates

  • Ramp rates must not exceed 3.0°C (5.4°F)/min during initial cure and 1.0°C (2°F)/min during post cure

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Case Studies

Frequently Asked Questions

01

Is this a suitable prepreg for fire-resistant aerospace interiors?

FR308 is designed for applications where fire, smoke and toxicity performance is critical. It meets CS 25.853 requirements, making it suitable for aerospace interior components and other areas where strict fire safety standards apply. 

02

What prepreg meets EN45545-2 certification for rail applications?

FR308 is compliant with EN45545-2 and achieves a HL3 rating, making it suitable for demanding rail applications where high levels of fire safety are required. 

03

Is there a more sustainable alternative to phenolic prepregs?

Yes. FR308 is a more environmentally friendly alternative to traditional phenolic and flame-retardant epoxy systems with a 99% bio-based formulation, while still offering strong fire, smoke and toxicity performance for aerospace, rail and construction applications.

04

Can flame-retardant prepreg be supplied with different fabrics?

Yes. FR308 can be supplied on a range of fabrics to suit different manufacturing, performance and cost requirements. Standard options include carbon and glass fibre, with other reinforcements available on request. 

05

What is a suitable prepreg for low smoke and toxic gas emissions?

FR308 is designed to deliver strong flame, smoke and toxicity performance. Independent testing shows it meets key aerospace and rail requirements, making it suitable where limiting smoke and harmful gas emissions is critical. 

Accreditations

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