BS 771-1992 酚醛模塑材料的规范

标准号：BS 771-1992
中文标准名称：酚醛模塑材料的规范
英文标准名称：Specification for phenolic moulding materials
标准类型：G32
发布日期：1992/11/15 12:00:00
实施日期：1992/11/15 12:00:00
中国标准分类号：G32
国际标准分类号：83.080.10
适用范围：1 General 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. 2 Types Four types of phenolic moulding material are speci-fied, as follows: — Type A: General purpose — Type C: Heat resistant — Type D: Impact resistant — Type E: Electrical applications 3 Filler The type of filler to be used in each type of phenolic moulding material is not specified but is usually as shown in the following examples: Type of moulding Filler material A Wood flour C Mineral filler D Cotton E Mica 4 Resin Abbreviations are used to indicate the type of phenolic resin, as follows: — One-step phenolic resin: PF 1 — Two-step phenolic resin: PF 2 5 Grades The various types of material are further sub-divided into grades based on the property levels and re-quirements. EXAMPLE 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. 6 Classification Table 1 shows the types and the grades of phenolic moulding material covered by this International Standard, together with their applications and dis-tinguishing 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 de-scription given.