Arbory Group - What is GRP?

What is GRP?

GRP stands for Glass Reinforced Polyester, outside the industry it is commonly referred to as fibreglass.

Sheets of glass fibre matting are layered over a mould which is then coated with a special resin.

The mixture is then left to set naturally or for quicker results is placed in an oven.

The hardend polymer is then decorated and polished according to the customers specified finish.

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The advantages of fibreglass over other common materials

The mould side of the product is left with a smooth aesthetically pleasing gelcoat finish, which never needs painting.
GRP is cost effective in the long term, because it is corrosive resistant and maintainance free.
Tooling costs are very low, in comparison with injection moulding and deep-draw steel tooling.
We can apply a range of textures to the finished surface, including render, brick and stone.
Damaged products are repairable.
GRP products have good chemical resistance.
GRP has good dielectric properties which makes it excellent as an electrical insulator.
GRP products have good heat insulation.
Mass production press tooling costs, are very competitive compared to other options.
GRP is versatile.

The GRP advantages in comparison to galvanised steel:

- corrosion resistance is not related to the zinc coating quality as on the steel,

- no risk of injury,

- resistant to salt water, to sulfur, chlorine or basic environments.

The GRP advantages in comparison to aluminium:

- no electrolytic corrosion due to contact of two metals in humid environment,

- much higher life span in basic, chlorine or halogen atmosphere.

The GRP advantages in comparison to stainless steel:

- absence of corrosion under tension (mechanical),

- absence of hollow corrosion,

- recommended in chlorine environments.

Mechanical Strength

A specific resistance, 2 to 4 times higher traditional materials, allows significant save of weight.

According to applications, a GRP solution (i.e.: 70% fibres, 30 % resin) allows a weight save, for equal resistance, up to:

- 60 % in comparison to stainless steel,

- 65 % in comparison to aluminium, -

- 75 % in comparison to hot dip galvanised steel.

Installation - Assembling

A quick and reliable assembling reduces your installation times up to 50%.

The GRP advantages in comparison to metals:

- no earthing required

- no requirement for electric continuity test,

- easy to work (cut, drill) on site,

- no burring, no finishing and no risk of injury.

Thermal / Electrical Insulation

Interesting properties for security....

- excellent thermal insulation (1000 times less heat conductor than aluminium) ,

- no spark risks due to contact with other materials,

- excellent electrical insulation ( ~ 6 KV / mm).

New Opportunities

The utilisation of composite materials, in particular glass reinforced polymer (GRP), offers new applications and new markets every day. Thanks to the development of new products and constant improvement of the fabrication process, Arbory Group Ltd continuously offers new opportunities to our partners.

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