All you wanted to know about GRP but were afraid to ask .....
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GRP stands for 'Glassfibre Reinforced Plastics', also referred to as 'Fibreglass', Composite Plastics, and in the USA, FRP. It is an amazingly versatile material, and one that is little understood in industry, but which has truly immense potential across a wide spectrum of applications. Its vast range of properties can be confusing to the uninitiated. It is a 'plastic', but it displays few of the disadvantages of conventional 'thermoplastics' in everyday use. |
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However, GRP is a moulded product which requires some sort of former or tool from which it is moulded. In its simplest and most common form, known as 'hand-lay', the mould is first prepared with a release wax, similar to car polish. The colour is then applied by brush or spray to the mould face as a 'gelcoat', which is a thickened, coloured resin. This is allowed to 'cure' for about 20-30 minutes, and is followed by layers of glassfibre mat together with the resin. This can be put down or 'layed-up' by brush, or even sprayed using special machines which 'chop' continuous filaments of glassfibre into specified lengths and blow these down in a spray of resin. The product is then formed by the hardening of the resin and glass matrix into an integrated moulding. The hardening agent is called the 'catalyst' which is mixed into the resin at precise formulations causing 'exothermic' heat to build up in the moulding. This cures the resin within a normal working time of 20-30 minutes. After about an hour the moulding can be lifted from the mould to be trimmed of excess material and finished as required. |
That is the basic technique. But over the years new technology has allowed much more sophisticated systems to offer far greater properties. Closed moulding now offers 'good-both-sides' mouldings, and the use of 'core' materials between the glassfibre laminations has added immeasurably to strength and durability. Techniques using translucent laminates can now 'encapsulate' graphics within the laminate both for protection and for backlit displays. Special masking techniques make multi-coloured and multitextured moulding possible.
Recent Customers say...
“We remain delighted with the performance of your products......future schemes will definitely include Harviglass.....we are most particular about quality and have found no issues with the product you have manufactured.”
RPB. NHS trust
“The project exceeded their expectations from design through to completed installation. The site installation team were exemplary in their professionalism and conduct throughout.”
JB. National Grid
Any Questions?
If you have any questions at all call us now on +44 (0)161 368 2398 or email on info@harviglass.com for immediate reply.
