Chopped Carbon Fibre 3K 3mm — High Strength Resin Additive

More strength. Less weight. Straight from the bag.

Chopped carbon fibre 3K 3mm is a short, rectangular flake-type fibre cut from unidirectional carbon — and when combined with resin, it delivers industry-leading strength-to-weight and stiffness-to-weight ratios that no conventional filler can match. Whether you’re reinforcing a bond, filling a cavity, or compounding a moulding mixture, this chopped carbon fibre adds meaningful mechanical performance to the finished part. Sold in 1kg bags, it’s ready to mix and use immediately.

What Chopped Carbon Fibre Actually Does

Chopped carbon fibre works by distributing short, high-modulus fibres throughout a resin matrix. Consequently, the cured compound carries loads more efficiently than neat resin or conventional fillers — delivering stiffness, strength, and fatigue resistance simultaneously.

Because the fibre is cut from unidirectional carbon, each flake retains the mechanical characteristics of the parent material. As a result, even at short fibre lengths, the performance uplift over standard resin compounds is significant and measurable.

Furthermore, the 3mm cut length suits a wide range of mixing and processing methods. Specifically, it disperses evenly in both low and high viscosity resin systems without clumping or settling, which means consistent mechanical properties throughout the finished part.

Key Performance Advantages

• High strength-to-weight ratio — delivers industry-leading mechanical performance per gram of additive
• High stiffness-to-weight ratio — significantly stiffer than glass fibre or mineral fillers at equivalent loading
• Excellent fatigue and creep resistance — finished parts maintain performance under sustained and cyclic loading
• Low thermal expansion — dimensional stability under temperature variation, therefore suited to precision applications
• Electrical and thermal conductivity — adds functional conductivity properties to the resin matrix
• Excellent friction and wear resistance — suited to sliding contact and wear-critical applications
• Low shrinkage — minimises dimensional change during cure for precision parts and tooling compounds
• Wide resin compatibility — works with epoxy, vinyl ester, unsaturated polyester, and phenolic systems

Typical Applications

Chopped carbon fibre 3K 3mm is used wherever resin alone isn’t enough — and across a surprisingly broad range of industries and processes:

• Bond Reinforcement — mixed into adhesive resin to add strength and stiffness to structural bonds and joints
• Gap Filling & Cavity Repair — combined with resin to create a high-strength filler compound for gaps, voids, and surface repairs
• Compression Moulding — used in sheet moulding compound (SMC) and bulk moulding compound (BMC) for high-strength moulded parts
• Injection Moulding Compounds — added to thermoplastic and thermoset compounds for injection moulded structural components
• Concrete Reinforcement — dispersed through concrete mixes to improve tensile strength, crack resistance, and impact toughness
• Tooling Compounds — mixed into tooling resin to improve dimensional stability and reduce thermal expansion in composite moulds
• Thermoplastic Reinforcement — compounded into thermoplastic materials to improve stiffness and reduce weight in finished parts
• Wear & Friction Applications — added to resin compounds for bearing surfaces, bushings, and sliding contact components

Technical Specifications

Contact Enhanced Composites for bulk pricing and volume availability.

Why Enhanced Composites

Enhanced Composites stocks chopped carbon fibre 3K 3mm as a ready-to-despatch inventory line — no waiting, no minimum order beyond the 1kg bag format. Furthermore, it sits alongside the broader range of carbon fibre fabrics, resin systems, and composite consumables. So whether this is a one-off additive purchase or part of a regular compounding process, everything else needed to complete the job comes from the same account.

Need bulk quantities? Email info@enhancedcomposites.com.au