Nylon, fibre glass-reinforced

Table 18.8 Comparison of short- and long-fibre glass-reinforced nylon 66 (50% fibre loading)...

Figure 2.1 TGA decomposition profiles for (a) PTFE and (b) fibre glass reinforced Nylon. Reproduced with permission from T. Ozawa, Bulletin of Chemical Society of Japan, 1965, 38,1881. 1965, Chemical Society of Japan [3]...

Typical applications for nylon include small gears, bearings, bushes, sprockets, housings for power tools, terminal blocks and slide rollers. An important design consideration is that nylon absorbs moisture which can affect its properties and dimensional stability. Glass reinforcement reduces this problem and produces an extremely strong, impact resistant material. Another major application of nylon is in fibres which are notoriously strong. The density of nylon is about 1100 kg/m. ... 

Effect of fibre content on properties of glass reinforced nylon 66... 

Glass is predominantly the most important and widely used fibre in reinforced plastics. Other fibres are natural (cotton, sisal, jute), synthetic (nylon, polyester, acetate, rayon), or organic and Inorganic high-performance fibres (aramid. boron, carbon/graphite). 

Reinforcements are the primary load carrying constituents and thus determine the strength and rigidity of the resulting pultrudate. The process that requires pulling is only possible because the reinforcement allows the part to be pulled through the die while it cures at the same time. The common reinforcements include glass (E, S or A type), carbon, aramid, boron and several new thermoplastic (polyesters, nylon) fibres. 

The properties of composites determine the processing techniques used, and these can be very different indeed. The two poles of the spectrum of composites are represented on the one hand by materials suitable for high speed conversion processes, such as injection-mouldable reinforced nylon, and on the other hand by materials used for high strength structures in very small numbers, like glass reinforced polyester for the hull of a minesweeper or carbon fibre reinforced epoxy for an airframe. 

Filbert, Jr., W. C. (1968) Glass reinforced 6 6 nylon - the effect of moulding variables on fibre length and the relation of fibre length to physical properties, SPE ANTEC Tech. Papers 14, 836-841. 

In all cases, carbon fibres lead to the highest mechanical performances compared to glass and aramid fibres. Nevertheless, their impact behaviour and price restrict their consumption. Glass fibres yield the cheapest composites but performances are more limited. Table 6.10 compares the properties of the main fibre types and shows some examples of properties for a nylon matrix reinforced with short fibres of the three types. 

For a 40% glass fibre reinforced nylon, all other things being equal, a relative change of 10% in the actual glass fibre level at a specific spot leads to a tensile strength change of about 6%. 

Isothermal and dynamic DSC were demonstrated to be useful tools for following the oxidative stability as a function of repeated injection moulding of glass fibre reinforced nylon [121]. Similarly DSC and OIT showed that a common feature for PP and HDPE is that the OIT sharply decreases after the two first extrusion steps due to the large amount of antioxidant initially con-... 

FRACTURE BEHAVIOUR OF SHORT GLASS FIBRE-REINFORCED RUBBER-TOUGHENED NYLON COMPOSITES... 

Abstract The effects of the amount of rubber, the concentration of fibres and the state of the fibre/matrix interface upon the mechanical behaviour of short glass fibre-reinforced rubber-toughened nylon 6 ternary blends are described. First, tensile tests were carried out on different intermediate materials and then on the ternary blends to derive the stress-strain curves and document the damage mechanisms. Fracture toughness tests were implemented on compact tension specimens and the results were correlated to fractographic observations and acoustic emission analysis to assess the role of the different constituents. 

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