Flax‐nonwoven reinforced polypropylene has become a competitor to textile glass fabric reinforced polypropylene because of its economic and ecological advantages. Suitable application forms are needle‐punched 100% flax or hybrid fabrics of flax/polypropylene manufactured of rough and fine decorticated flax. The construction of the nonwoven influences the strength, handle, matrix compatibility, and flow of the fabric. In this way, composite properties may be tailored to each end‐use. The main application fields are subassemblies exposed to a medium range of stress. The method of hybrid‐nonwoven manufacturing represents a technological alternative to the existing film‐stacking method. Produced with lower technology, the parameters of composites of hybrid‐nonwovens are comparable to properties of composites manufactured by the film‐stacking method. Adhesion characteristics may be improved by addition of compatibilizers. The compatibilizers may be added to the flax‐fiber surface or may be inserted into the polypropylene. All these methods lead to comparable mechanical parameters for the fiber composites.
use of ARM-Laminates results to a possible temperature decrease of more than 23 C or » 16 % at the IC. Industrial assembled ceramic packages based on ARM-Laminates for RFpower amplifier have been produced with a heat dissipation increase of more than 13 % compared to state-of-the art heat spreader composites.
Aramid pulp offers excellent potential for effective reinforcement of thermoplastic elastomers such as polyamides because of its highly fibrillated fibre structure and correspondingly large surface area. However, the disadvantage of aramid pulp is that it is not free-flowing and so cannot be metered effectively. For that reason continuous metering in processes such as compounding is virtually impossible. However, research and development work at TITK has resulted in a way of processing aramid (AR) pulp to obtain prepregs which are suitable for metering. Results obtained by compounding meterable pulp with PA 6 and composite properties achieved by injection moulding are described below.
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