Capacitor tissue paper
1 Scope
This standard specifies the product classification, technical requirements, test methods, inspection rules, and marking, packaging, transportation and storage of capacitor tissue papers.
This standard is applicable to the tissue papers for metallized paper capacitors and standard capacitors.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However parties to agreements based on this standard 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 applies.
GB/T 450 Paper and board - Sampling for testing and identification of machine and cross direction, wire side and felt side (GB/T 450-2008, ISO 186:2002, MOD)
GB/T 451.1 Paper and board - Determination of size and deviation
GB/T 451.3 Paper and board - Determination of thickness (GB/T 451.3-2002, idt ISO 534:1988)
GB/T 462 Paper, board and pulp - Determination of moisture content of analytical sample (GB/T 462-2008, ISO 287:1985, ISO 638:1978, MOD)
GB/T 742 Fibrous raw material, pulp, paper and board - Determination of ash (GB/T 742-2008, ISO 2144:1997, MOD)
GB/T 1408.1 Electrical strength of insulating materials - Test methods - Part 1: Tests at power frequencies (GB/T 1408.1-2006, IEC 60243-1:1998, IDT)
GB/T 1545.1-2003 Paper, board and pulp - Determination of acidity or alkalinity
GB/T 2678.2 Paper, board and pulps - Determination of water soluble chlorides
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T 2828.1-2003, ISO 2859-1:1999, IDT)
GB/T 7977 Paper, board and pulps - Determination of conductivity of aqueous extracts (GB/T 7977-2007, ISO 6587:1992, MOD)
GB/T 10342 Paper - Package and mark
GB/T 10739 Paper, board and pulps - Standard atmosphere for conditioning and testing (GB/T 10739-2002, eqv ISO 187:1990)
GB/T 12914 Paper and board - Determination of tensile properties (GB/T 12914-2008, ISO 1924-1:1992, ISO 1924-2:1992, MOD)
3 Product classification
3.1 The capacitor tissue papers are classified into three levels, i.e., superior products, first-class products and acceptable products, according to quality.
3.2 The capacitor tissue papers are classified into Type I and Type II according to density.
3.2.1 The density of Type I is 1.00g/cm3.
3.2.2 The density of Type II is 1.20g/cm3 and 1.15g/cm3.
3.3 The capacitor tissue papers are roll papers, with a roll width of 140mm, 280mm, 420mm and 500mm or conforming to the contract.
3.3.1 Permissible deviations for the roll width: if the roll width is less than or equal to 200mm, the deviation shall not be greater than ±1.0mm; if the roll width is greater than 200mm, the deviation shall not be greater than ±2.0mm.
3.3.2 The roll diameter is generally 220mm~250mm. The inner diameter of the paper core shall be (75±1.0)mm and (76±1.0)mm. When there is an agreement in the order contract, they shall comply with the contract.
3.4 The type, thickness, specification, grade and packaging of capacitor tissue papers shall be set out in the order contract.
4 Technical requirements
4.1 The chemical properties of the capacitor tissue papers shall be in accordance with those specified in Table 1.
Foreword I
1 Scope
2 Normative references
3 Product classification
4 Technical requirements
5 Test methods
6 Inspection rules
7 Marking, packaging, transportation and storage
Annex A (Normative) Determination of dielectric dissipation factor (tgδ) for capacitor tissue paper
Annex B (Normative) Determination of conducting path for capacitor tissue paper
Annex C (Normative) Determination of breakdown voltage for capacitor tissue paper
