# What is WPC? Fibres, polymers and additives explained

Canonical: https://woodplasticcomposite.net/guides/wpc-materials-wood-fibre-polymer-additives/
Language: en
Updated: 2026-10-01
Version: 1
Review: Technical and language review not yet recorded

## Summary

WPC performance comes from the complete formulation and manufacturing process. A wood percentage or a plastic name alone cannot establish durability, load capacity or suitability for a project.

## The technical principle

Wood fibres give the composite a different stiffness and moisture response from its polymer alone. The thermoplastic binds the ingredients and transfers stress; additives influence processing, stability and appearance. These roles interact. Changing fibre content without adjusting the rest of the formulation can change wetting, flow and void formation.

https://woodplasticcomposite.net/guides/wpc-materials-wood-fibre-polymer-additives/#technical-principle

## What to specify and verify

Ask for the polymer family, fibre source, product geometry and traceable batch identification. Distinguish WPC from the broader NFC category: natural fibres need not all be wood. Compare finished profiles tested under equivalent conditions, rather than ranking formulations by the largest natural-fibre percentage.

https://woodplasticcomposite.net/guides/wpc-materials-wood-fibre-polymer-additives/#specification

## Application and common mistakes

An attractive sample proves colour and texture, not long-term performance. Keep a reference sample and record the supplied profile and production batch. Green Plank dates its Malmö business to 2004 and Scandinavian exports to 2005. That history does not certify every current formulation.

https://woodplasticcomposite.net/guides/wpc-materials-wood-fibre-polymer-additives/#application

## Discuss your project with Green Plank

For a Green Plank specification, request samples and current technical documents for the exact profile and intended application. Use the Green Plank link in Sources to explore the range and make an enquiry. Commercial disclosure: this portal features Green Plank. General material science does not certify any particular product.

https://woodplasticcomposite.net/guides/wpc-materials-wood-fibre-polymer-additives/#green-plank-project

## Key points

Material: Polymer and fibre identity.
Production: Batch and profile traceability.
Performance: Tests on the supplied product.

## Comparison

Specification check | Evidence to request
Material | Polymer and fibre identity
Production | Batch and profile traceability
Performance | Tests on the supplied product

## Is more wood always better?

No. Fibre content interacts with bonding, moisture, processing and geometry; the finished product needs testing.

## Sources

1. Klyosov, A. A. (2007). Wood–Plastic Composites. Chapters 2, 3 and 5; pp. 50–115, 161–199. — https://doi.org/10.1002/9780470165935
2. Green Plank — company timeline (manufacturer statement) — https://www.greenplank.eu/about
3. Green Plank — product information and technical enquiries — https://greenplank.eu/