1 Scope
This part specifies the requirements for biaxially oriented polypropylene film having a smooth surface or rough surface, corona treated when required for vacuum metallization. The films are for use as dielectric in capacitors.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of GB/T 13542. For dated references, subsequent corrigenda (excluding corrections), or revisions, of any of these publications do not apply this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
ISO 534:1988 Paper and Board - Determination of Thickness and Apparent Bulk Density or Apparent Sheet Density
IEC 60674-1:1980 Specification for Plastic Films for Electrical Purposes - Part 1: Definitions and General Requirements
IEC 60674-2:1988 Specification for Plastic Films for Electrical Purposes - Part 2: Methods of Test [Corrigendum 1 (2001)]
IEC 61074:1991 Determination of Heats and Temperatures of Melting and Crystallization of Electrically Insulating Materials by Differential Scanning Calorimetry
3 Classification and Designation
3.1 Classification
The polypropylene film shall be of the following types:
Type 1: having smooth surfaces (space factor <5%, see 6.9);
Type 1a: not corona treated;
Type 1b: one side pre-treated to facilitate the vacuum deposition of metal;
Type 1c: both sides pre-treated;
Type 2: having at least one rough surface (space factor ≥5%, see 6.9);
Type 2a: not corona treated;
Type 2b: one side pre-treated to facilitate the vacuum deposition of metal;
Type 2c: both sides pre-treated.
3.2 Designation
The polypropylene film shall be identified by the following designation:
PP-Model-Thickness (μm)-Width (mm)-Length (m)
Foreword i
1 Scope
2 Normative References
3 Classification and Designation
4 General Requirements
5 Dimensions
6 Properties
7 Roll Characteristics
Annex A (Normative) Calculation Method for Dielectric Dissipation Factor and Relative Permittivity
