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Insights from JEC EU: Flax Fiber-reinforced Flaxpreg Thermoset for Vehicle Compartment Floor

Published on 2015-02-23. Author : SpecialChem

JEC Europe 2015 - Flaxpreg is a green and lightweight thermoset sandwich material reinforced with very long flax fibers that can be effectively used as a multi-position trunk load floor or structural floor in the passenger compartment of a vehicle.

The prepreg FlaxTapes of about 120 g/m² that form the skins of the sandwich are unidirectional-aligned flax fiber tapes, with acrylic resin in the example shown, easily handled without requiring any spinning or weaving step and thus without any negative out-of-plane crimping of the almost-continuous flax fibers.

The Flaxpreg project, developed by Faurecia together with PSA, Lineo and the University of Reims, aims to design structural trim parts following three objectives: a drastic weight reduction, the use of renewable resources and a process in line with automotive cycle times and material cost constraints. Thanks to the material’s very low density (1.45), combined with an adaptative 0°/90°/0° orientation of the FlaxTapes depending on the loading boundary conditions, the resulting excellent mechanical properties allow a 35% weight reduction compared to petro-sourced glass mat/PUR sandwich solutions (such as Baypreg).

The vibro-acoustic damping properties of FlaxTape skins are remarkable, with a damping loss factor close to 2%. Correlations between static experimental measurements and mechanical simulation using the finite element method with a homogenized honeycomb model will be presented besides the first results for creep and vibro-acoustic sandwich properties.

About JEC


The JEC Company was created in December 1996 as a subsidiary of CPC, The Center for Promotion of Composites, and a non-profit association.

JEC had fully committed to the expansion of composites. JEC increased six fold in scope, network and number of employees delivering a growing service to the composites sector. In addition to its headquarters in Europe (Paris, France), JEC opened offices in America and Asia. Its working Principle is the consistent reinvestment of all income into the development of new products and services for the benefit of all players in the worldwide composites community.

Source: JEC


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