BSI - BS 771
Phenolic Moulding Materials
|Publication Date:||15 November 1992|
|ICS Code (Thermosetting materials):||83.080.10|
This International Standard specifies requirements for the physical and chemical properties of phenolic moulding materials, classified by type and grade according to their use and properties.
Four types of phenolic moulding material are specified, as follows:
- Type A: General purpose
- Type C: Heat resistant
- Type D: Impact resistant
- Type E: Electrical applications
The type of filler to be used in each type of phenolic moulding material is not specified.
Abbreviations are used to indicate the type of phenolic resin, as follows:
- One-step phenolic resin: PF 1
- Two-step phenolic resin: PF 2
The various types of material are further sub-divided into grades based on the property levels and requirements.
PF 2A1 is a phenolic moulding material made from two-step resin, intended for general applications. The last digit indicates a particular grade of one type of material.
Table 1 shows the types and the grades of phenolic moulding material covered by this International Standard, together with their applications and distinguishing properties.
It shall not be inferred from the classification given in Table 1 that materials of any particular grade are necessarily unsuitable for applications other than those indicated, or that specific material will be suitable for all applications within the wide description given.