MODUK DEF STAN 93-57 PDF

This Defence Standard specifies requirements for two grades of rubber sheet, cellular, closed cell, non-(oil resistant) quality available in various thicknesses for use as cushioning materials as follows:

Grade 1 medium density

Grade 2 high density, for use when a higher load carrying capacity is required.

For each grade there are two types of material available as follows:

Type GP General Purpose

Type MT Minimum Tarnishing, for use when it is necessary to minimize the possibility of tarnishing or surface corrosion of silver copper and copper alloys with which it may be in contact or close proximity.

The material has low water retention properties and is therefore suitable for use outside a water vapour barrier.

The material is not resistant to mineral lubricating oils and petroleum fuels. It is susceptible to mould and fungal growth in warm moist conditions.

If stored for long periods at temperatures below approximately 5°C crystallisation may occur giving rise to stiffening of the material. This effect is most rapid in the region of –25°C. A sufficient rise in storage temperature reverses this effect.

The materials specified in this Defence Standard have no requirement for fire retardancy and the materials may burn readily.