Manufacturing process
Spray-up
Also known as spray lay-up
An open-mould process in which chopped fibre and catalysed resin are sprayed together into a mould. It is cheap but limited to short fibres and gives heavy, resin-rich laminates.
Classification
- matrix families
- POLYMER
How this record is known
- 2
- Settled consensus
- Cited as the accepted position of the discipline.
2 of 2 claims on this page cite at least one registered source. Counts describe how each statement is known, not how likely it is to be true.
What Lithoen records
Each claim states how it is known and cites its evidence.
EstablishedResin-rich laminates, short fibres only, styrene exposure, poor precision.
Spray-up is low in cost but gives resin-rich, heavy laminates; only short fibres and low-viscosity resins can be sprayed, which limits mechanical properties; high-styrene resins are hazardous to workers and the emissions are costly to control, which has moved many manufacturers to closed-mould infusion; and finish and precision are poor, so its use has been mostly limited to large consumer goods.
Evidence support: Supported by the cited evidence · one source
Evidence: U.S. Department of Energy 2015 · Primary authority
EstablishedChopped fibre and catalysed resin sprayed into an open mould; ambient cure.
In spray-up, chopped fibre and catalysed resin are sprayed directly into an open mould and the laminate cures under ambient conditions.
Evidence support: Supported by the cited evidence · one source
Evidence: U.S. Department of Energy 2015 · Primary authority
Record last updated 2026-10-30. Corrections follow the published corrections policy; superseded claims are retained, never silently edited.