Evaluation of the potential of three non-woven flax fiber reinforcements: Spunlaced, needlepunched and paper process mats

Type Article
Date 2016-05
Language English
Author(s) Martin Nicolas1, 3, Davies PeterORCID2, Baley Christophe1
Affiliation(s) 1 : Univ Bretagne Sud, LIMATB, EA 4250, F-56100 Lorient, France.
2 : IFREMER, Ctr Bretagne, BP70, F-29280 Plouzane, France.
3 : Van Robaeys Freres, 83 Rue St Michel, F-59122 Killem, France.
Source Industrial Crops And Products (0926-6690) (Elsevier Science Bv), 2016-05 , Vol. 83 , P. 194-205
DOI 10.1016/j.indcrop.2015.10.008
WOS© Times Cited 21
Keyword(s) Flax fibers, Non-wovens, Composite materials, Polypropylene
Abstract This paper presents results from an experimental study of three types of non-woven preforms (needlepunched, spunlaced and mat manufactured using a paper-making process) intended as composite reinforcement. These are potentially very attractive for transport applications. First, the influence of processing on elementary fiber tensile properties is shown to be limited. Then the preforms are evaluated in polypropylene matrix composites and mechanical properties are determined. The structure of non-woven reinforcements is strongly dependent on the manufacturing route. By varying the fiber content it is shown that the most efficient reinforcement for flax fibers is the mat produced by paper processing. The new spunlaced reinforced composites are shown to have slightly lower tensile properties (15% lower strength, and 25% lower stiffness) compared to mat composites at equivalent volume fraction, but further optimization is possible for these materials. Based on the measured constituent properties micromechanics models have been used to estimate composite stiffness. A good correlation is obtained between test results and model predictions.
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