Long-fibre Reinforcement

For example, in an ideal PA 66 compound, reinforced with 50% glass fibre and with all fibres aligned along the length of the moulding, the flexural and tensile moduli increase rapidly as the fibre length is increased from 0.1 to 1.0 mm. [Pg.52]

As a result, technology has been developed to enable the use of long fibres (around 2 mm) in a thermoplastic resin matrix. These are produced, not by classical physical mixing, but by a process analogous to the pultrusion process with thermosetting resin matrices, with internal lubrication additives to counteract the chopping effect of injection moulding. Similar effects have been measured with other fibres, such as aramid and carbon, and with other matrices, such as polypropylene and poly(phenylene sulphide). [Pg.52]

Fibre length number average (mm) Fibres longer than 0.2 mm (%) Notched Izod impact strength (kj m- ) [Pg.52]

LFRT Long fibre reinforced thermoplastic PFA Perfluoroalkoxy-modified... [Pg.762]

Thermoplastic composites, GMT. According to The European Alliance for SMC, the production of glass mat reinforced thermoplastics (GMT) and long fibre reinforced thermoplastics (LET) was up about 9% in 2002, demonstrating bright future prospects. Some examples are ... [Pg.100]

ISO 75-3 2004 Plastics - Determination of temperature of deflection under load - Part 3 High-strength thermosetting laminates and long-fibre-reinforced plastics... [Pg.175]

Processing of LFRT or LFT - long fibre (reinforced) thermoplastics injection, composite insert moulding, compression moulding, extrusion-compression. [Pg.742]

Mass production parts bumpers, soundproofing shields, cross-pieces, inserts for dashboards, seat frames, containers, welding helmets, ventilator housings, base of lawn-mowers, taping of pipes, pipelines, tanks, long fibre reinforced injected parts. [Pg.775]

LFRT (long fibre reinforced thermoplastics) are reinforced with fibres about 2 cm long, far from the length of continuous fibres. Practically all the properties are influenced by the addition of fibres. The most significant parameters are ... [Pg.823]

Use of structural plastics long fibre reinforced thermoplastics (LFRT), glass mat thermoplastics (GMT), thermoplastic sandwich structures, carbon fibre reinforced thermoplastics. [Pg.848]

It is well known that the Young s modulus of a composite can be calculated by the rule of mixtures for long-fibre reinforced material. In the case of whiskers, the rule of mixture is also applied to estimate the change of modulus (conventionally, reinforcements are added to improve the stiffness of a material, though for ceramic matrix composites this is not always the primary concern). [Pg.46]

Large aspect ratio Because the reinforcements are nanosized, the large aspect ratio (length/diameter) could make the composite behave like a continuous fibre composite. This scenario is unlikely as the aspect ratios of the NWs used are "- 100-200, which are lower than the value of "-T000 or so for a transition between short-fibre reinforced composite behaviour and the long-fibre reinforced one [18]. The specimen dimensions are also much larger than the NW dimensions. The anomalous increase from the relatively smaller sized specimens is ruled out. [Pg.592]

Hou (1986) presented a resin-flow model for long-fibre-reinforced-composite prepreg lamination processing. The model includes the following chemorheological model ... [Pg.405]

ISO 10,350 2, Plastics—Acquisition and presentation of comparable single-point data Part 2, Long fibre-reinforced plastics. [Pg.426]

Markarian J. Long fibre reinforcement drives automotive market forward. Plastics Addit Compound [trade journal—Elsevier Ltd.] May/June 2005. [Pg.255]

Resin transfer moulding (RTM) As above, but long fibre reinforcement preform cut to shape and placed in cavity instead of using premixed short fibres. One half of mould cavity can be flexible Large, complex shapes for automotive and aerospace use. Relatively fast cycles... [Pg.34]

A further development is resin transfer moulding (RTM), in which long fibre reinforcement fabrics are cut to shape as preforms and placed in the mould cavity, before the resin is injected. This is potentially a slow process and one alternative is for the preforms to be made rapidly by spraying short fibres onto a suitably shaped pattern coated with an adhesive or binder. [Pg.37]

Hine PJ, Davidson N, Duckett RA, Ward IM (1995) Measuring the fibre orientation and modelling the elastic properties of injection-molded long-fibre-reinforced nylon. Compos Sci Technol 53 125-131... [Pg.290]

Plastics—Determination of Temperature of Deflection under Load—Part 3 High-Strength Thermosetting Laminates and Long-Fibre Reinforced Plastics... [Pg.965]

New materials for old applications still appear. Street lighting poles (lamp posts) may be made of long fibre-reinforced thermoplastics in future rather than thermosets, steel or almniniiun. [Pg.15]

M Zettler, E Doting. Latest developments in the processing and application technology of long fibre reinforced thermoplastics. Kunststoffe German Plastics 79 19-... [Pg.332]

R Bailey, H Kraft. A study of fibre attrition in the processing of long fibre reinforced thermoplastics. Int Polymer Proc 2 94-101, 1987. [Pg.332]

It is possible to perform injection moulding with very high speeds, (i.e., with common cycle times of 10-30 s). A recent process called foiled FibrePur technology (FFT), which is a plastic-foil finishing technique in RIM based on long-fibre reinforced PU which produces fully finished painted parts in a single-step process [8, 9]. [Pg.340]

From graph 1, it can be seen that a maximum in impact resistance in long fibre reinforced matrices is reached at a length of pim. 1 cm. The actual breakdown of the curve has to be attributed to other facts associated with the production of these composite structures. [Pg.51]

Table 5.8 Long fibre-reinforced thermoplastics effect of fibre length...

Hojo, H., Kim, E. G., Yaguchi, H. and Onodera, T. (1988), Simulation of compression moulding with matrix-fibre separation and fiber orientation for long fibre-reinforced thermoplastics . International Polymer Processing, 3,54-61. [Pg.93]

Nuno Ferreira Da Mota, J., Pedro Louren o Gil Nunes, J. and Sergio Duarte Pouzada, A. (Universidade Do Minho) (2(X)1), Pultrusion head to produce long fibre reinforced thermoplastic matrix profiles, WIPO Patent WO 02/06037 Al, 13 July 2001. [Pg.412]

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