Chopped strand mat (or CSM as it is often known) is the most widely used of all composite reinforcement materials.
Short strands of glass are randomly scattered and bound to create a mat which can then be wetted out with resin and used as a general purpose reinforcement for traditional fibreglass (GRP/FRP) moulds or parts.
Due to its comparatively low performance compared with alternative reinforcements (woven glass fabric, carbon fibre, Kevlar etc.) chopped strand mat is certainly not at forefront of advanced composites but there are still applications where it is used in parts and it is still used extensively in the production of patterns and moulds for more advanced composites.
This 'emulsion bound' CSM is designed for use with polyester resin or vinylester resin which will quickly break down the emulsion binder so that the mat can easily be laminated by brush or roller to follow the contours of the mould.
450g CSM is the recommended reinforcement for our Uni-Mould universal mould making system.
Emulsion bound CSM is not suitable for use with epoxy resin because the emulsion binder will not be broken down by epoxy, making the mat almost impossible to laminate with.