Glass reinforced nylons

The effect of temperature on properties can be seen in Figure 2, which shows the effect on modulus of increasing temperature of unmodified and glass-reinforced nylon-6,6. Impact strength, however, shows a steady increase with temperature as it does with moisture. 

Glass-reinforced nylon compounds have become available in recent years and are dealt with in the next section. 

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

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

Type 3660 chopped strand, for use with hydrolysis-resistant nylon 66 compounds, aimed particularly at glass-reinforced nylons for radiator and other under-bonnet automotive applications. It has improved elongation and toughness after exposure to ethylene glycol engine coolant, giving up to 10-30% higher impact resistance in impact-modified compounds. 

Polypropylene and nylon Reactive intermediate in making polyester and epoxy flame retardant resins Polyolefins, ABS, polyesters Thermosets and thermoplastics Urethane foams and polyesters Plastic foams and polyester fibers Thermoplastics usually as a synergist Engineering thermoplastics Glass reinforced nylon and PBT... 

Esbrid, Ceramic/glass reinforced nylon, Thermolil, Inc. 

Antimony trioxide has a synergistic effect with most halogenated FRs. It is also used in plasticized PVC because of its synergy with chlorine. Antimony oxide should not be used if translucency is required. In some cases ferric oxide is used in its place, for similar physical properties but improved electrical properties. It has been shown by extensive research to be non-carcinogenic. For polymers apart from PVC. a 50% replacement of antimony trioxide is possible with virtually all polymer systems. In particular with both plain and glass-reinforced nylons, excellent flame retardation can be achieved with a suitable combination of zinc sulphide and melamine cyanurate, eliminating both halogens and antimony trioxide. 

In recent years, polyamides have been increasingly used in higher temperature applications (mainly automotive) and in addition to the newer high melting point materials, glass-reinforced nylon-6,6, in specially modified formulations, has been shown to be suitable for use in replacing metals at temperatures which would not have been considered possible a few years ago (13). 

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