BS 6236-2:1988

National foreword
Committees responsible
Methods
Introduction
1 Scope
2 Preparation of test specimens for curable materials
3 Thickness
4 Density
5 Apparent density
6 Composition
7 Tensile strength and elongation at break
8 Flexural strength and elastic modulus in bend
9 Folding
10 Stiffness
11 Resistance to exudation and displacement
12 Elastic compression and plastic compression
13 Resin flow and consolidation
14 Gel time
15 Electric strength
16 Dissipation factor/temperature characteristics at
    frequencies of between 48 Hz and 62 Hz
17 Dissipation factor/voltage characteristics at
    frequencies of between 48 Hz and 62 Hz
18 Detection of defects and conductive particles
19 Penetration
20 Thermal endurance
Figures
1 Assembly of stacks for preparing test laminates
2 Conditions for press procedure
3 Apparatus for measurement of stiffness
4 Apparatus for measurement of stiffness
5 Elastic compression, plastic compression
6 Standard Williams type penetrometer

Describes the methods of test applicable to built up mica materials, products based on them and mica paper. Covers preparation of test specimens for curable materials, thickness, density, composition, tensile strength and elongation at break, flexural strength and elastic modulus in bend, folding, stiffness, resistance to exudation and displacement, elastic compression and plastic compression, resin flow and consolidation, gel time, electric strength, dissipation factor & temperature characteristics at frequencies of between 48 Hz and 62 Hz, dissipation factor & voltage characteristics at frequencies of between 48 Hz and 62 Hz, detection of defects and conductive particles, penetration and thermal endurance.