INTRODUCTION

Perforated materials have been in use for as long as, if not longer, than woven wire screencloth. Like its counterpart, perforated materials is available in almost any type of material.

The limiting factor that determines whether or not a material can be perforated is normally its ultimate tensile strength (U.T.S.). Materials with values up to 750 MPa can normally be perforated and above this figure the norm would be either drill or use one of the many cutting processes to produce the required aperture. It should also be recognised that some materials with lower U.T.S. values, due to their plasticity, may also not be suitable for perforating.

For individual manufacturers of perforated materials the limiting factor could well be the capacity and size of the physical perforating presses in use. No one manufacturer will cater for the complete spectrum of perforated materials, but he will cater for the most commercially practical range. It is recommended that a check is made concerning all requirements with the relevant manufacturers prior to finalising a design and / or order. Screen Products can, subject to material thickness, aperture type and size, perforated materials from 0,2 up to 16 thick, with aperture sizes varying from 0,50 to 0,90.

Standard tool sets are generally for a specific material thickness. It may therefore be possible to have a certain aperture specification available but not for the thickness of material required. Screen Products applies the latest relevant International Specifications pertaining to apertures sizes on all manufactured perforated materials i.e.

BS 1449
BS 1669
BS 7613
ISO 10630
In addition to our complete range of perforated materials we offer Dewco (Sweco) machines and spares, expanded metal, polyurethane products. Vee (wedge) wire, welded mesh, wire conveyor belts and woven wire screens and mesh to compliment our supply to the individual markets.