# WPC, NFC and WTC: what the names actually mean

Canonical: https://woodplasticcomposite.net/guides/wpc-nfc-wtc-wood-polymer-composite-definitions/
Language: en
Updated: 2026-10-16
Version: 1
Review: AI-assisted English article. Human technical review has not been recorded.

## Summary

WPC describes a family of wood–polymer composites. NFC is broader because its reinforcement can come from non-wood natural fibres. Neither abbreviation is a performance grade.

## Start with the constituents

Wood-plastic composite and wood-polymer composite are commonly used for combinations of wood flour or fibres with a polymer matrix. Woodfiber-plastic composite emphasizes the fibrous component, but the name alone does not establish fibre length or reinforcement efficiency. Wood-thermoplastic composite, abbreviated WTC, explicitly identifies a matrix that softens when heated. Older and broader WPC definitions also include thermosetting resins. 

NFC means natural fibre composite in this context. It can include wood, flax, hemp or agricultural fibres. Elsewhere, NFC can also mean nanofibrillated cellulose; a specification should spell out the term on first use. The European EN 15534 series addresses cellulose-based materials combined with thermoplastics.

https://woodplasticcomposite.net/guides/wpc-nfc-wtc-wood-polymer-composite-definitions/#start-with-the-constituents

## Turn terminology into a useful specification

An architect needs more than a material acronym. A procurement description should identify the polymer family, fibre source, profile geometry, surface construction and intended application. These details let the purchaser connect a supplied product to its test evidence.

See the comparison table below for turn terminology into a useful specification.

https://woodplasticcomposite.net/guides/wpc-nfc-wtc-wood-polymer-composite-definitions/#turn-terminology-into-a-useful-specification

## A practical comparison rule

Compare products at the same level: complete board against complete board, or compound against compound. A tensile result from an injection-moulded test bar does not establish the capacity of a hollow decking profile. Keep the sample identity, manufacturing route and intended use beside every reported result.

https://woodplasticcomposite.net/guides/wpc-nfc-wtc-wood-polymer-composite-definitions/#a-practical-comparison-rule

## Evidence and source scope

[1] Research handbook; terminology and matrix distinctions.

[2] Official standards catalogue; scopes, not full normative text.

https://woodplasticcomposite.net/guides/wpc-nfc-wtc-wood-polymer-composite-definitions/#evidence-scope

## Key points



## Comparison

Label on a quotation | Useful follow-up question
WPC decking | Which polymer, profile and installation system?
NFC panel | Which fibre, binder and exposure classification?
Wood-filled plastic | Is the filler acting mainly as an extender or reinforcement?
Recycled composite | Which constituent is recycled, and how is its percentage verified?



## Sources

1. Wood/Nonwood Thermoplastic Composites; Clemons et al. (2013) — https://research.fs.usda.gov/treesearch/42497
2. EN 15534 standards series; BSI — https://landingpage.bsigroup.com/LandingPage/Series?UPI=BS+EN+15534