GRP Production Runs

MPM offer high quality fibreglass mouldings in either high or low volume. Our flexibility and skill allow a wide complexity of projects, from bath panels, shower trays, ambulance parts, wheel chair access ramps, water tanks and many other products.

With over 30 years' experience, an exceptional team and the skill to produce your moulds, we can meet your demands and product requirements.

Wet Lay-Up

Wet Lay-Up involves hand application of chopped strand mat glass fibres with a resin, which is then consolidated to remove all air cavities to form the laminate.

When a resin (which can be in a polyester, vinyl ester or fire retardant format) is added to the glass fibres it becomes a material of exceptional strength and adaptability. The resins commonly used are made from unsaturated polyesters dissolved in styrene. Various types of resin can be produced and it is possible to create bespoke polyesters to fit specific requirements. The resin is a thick liquid substance which is rolled out onto the glass fibre, this is then activated by a catalyst, the binder on the glass fibre is dissolved by the resin and sets to a hard but brittle solid sheet.

Several layers can be applied until the desired amount of glass fibre is achieved. In some cases glass fibre rovings are applied instead of chopped strands to reduce the thickness. Once the curing process is finished the composite is complete.

The main advantage of Wet Lay-Up is that it is simple to set up and hence makes it widely used.  The capital investment is quite low and production can be implemented quickly.

Unfortunately, it can be classed that you do not require highly skilled labour (don’t be fooled), but in our experience if you use and aim for low-mid level skill it always affects RFT & quality and our delivery of service.

Spray Lay-Up

The spray lay-up technique uses a spray gun, to spray pressurised resin and reinforcement in the form of chopped fibres. Generally glass roving is used and is passed through the spray gun where it is chopped. The matrix* (generally polyester resin is used) and reinforcement are sprayed at the same time.

Spray lay-up is used for lower load carrying parts like small boats, bathtubs, truck fairings. This method can provide high volume of reinforcement in composites and there is practically no part size limitation.

*The Matrix - Epoxy, polyester, vinyl ester, phenolic resin, unsaturated polyester, polyurethane resin

"The process of dealing with MPM has exceeded our expectations.
Whatever we throw at MPM, they always deliver. We thought it was going to be difficult to find a supplier that would match our high standards of quality and service, not so, they have been a pleasure to deal with and we look forward to a future of mutual business growth."

"The process of dealing with MPM has exceeded our expectations.

Whatever we throw at MPM, they always deliver. We thought it was going to be difficult to find a supplier that would match our high standards of quality and service, not so, they have been a pleasure to deal with and we look forward to a future of mutual business growth."

Showers and Eyebaths | READ THE CASE STUDY

Key Benefits

  • Short lead times for component production
  • Minimal equipment and tooling costs
  • Products can be produced to fire retardant spec
  • Relatively inexpensive and readily available materials
  • Versatility of part shape, size and laminate configuration
  • Design changes can be easily made
  • Cost competitive for individual items and short runs of complicated designs
  • Scope for a wide range of physical and mechanical properties in the laminate
  • Production of high quality corrosion resistant components
  • Sandwich construction and inserts are readily incorporated

 

GRP Production Runs