Glass-fibre reinforced plastics GRP

By using special techniques, in which the reinforcing glass fibres are wound on in the form of a continuous filament, high strength can be obtained, and this method is used to produce pressure vessels. 

The polyester resins are resistant to dilute mineral acids, inorganic salts and many solvents. They are less resistant to alkalies. 

Glass-fibre-reinforced epoxy resins are also used for chemical plant but are more expensive than the polyester resins. In general they are resistant to the same range of chemicals as the polyesters, but are more resistant to alkalies. 

The polyester resins, reinforced with glass fibre, are the most common thermosetting plastics used for chemical plant. Complex shapes can be easily formed using the techniques developed for working with reinforced plastics. Glass-reinforced plastics are relatively 

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T Lindheim, Erosion performance of glass fibre reinforced plastics (GRP) , Revue de I Institut Francais du Petrole 1995 50(1) 83-95. 

This is the commonest reinforcing material. Glass fibre reinforced plastic (GRP), more commonly referred to as fibreglass, has many useful properties such as high tensile and compressive strength, hard smooth surfaces unreactive to chemicals, fire resistance, insulator of heat, electricity and sound, impervious to water, easily... 

An optimal combination between aerodynamic and weight requirements was achieved for the Transrapid by modular hybrid (mixed) construction methods. For example, the glass-fibre-reinforced plastic (GRP) front module is designed for maintaining aerodynamic pressure as well as for stability under cross wind forces of 500 km/h, and is bonded to the front of the aluminium structure of the rail cars with Sikaflex products (Fig. 5). 

Glass fibre reinforced plastic (GRP) requires black-coloured Sika Primer-206 G-i-P or Sika Primer-215... 

Polyurethane adhesives currently used to bond most thermosets, including glass fibre reinforced plastics (GRP), sheet moulding compound (SMC), glass fibre reinforced epoxy (GRE), and thermoplastic composites including ABS, PVC, acrylics, polycarbonates, etc., are pre sented in Table 20. 

Figure 8.7 Effect of immersion in water at 40 °C on the tensile lap-shear strength of glass fibre reinforced plastic (GRP) substrates bonded with a two-part acrylic adhesive [40]. The surface pretreatment was simply an abrasion/solvent-cleaning process.

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