ASTM D1305-99(2009)

Standard Specification for Electrical Insulating Paper and Paperboard-Sulfate (Kraft) Layer Type

ABSTRACT
This specification covers electrically insulating, unbleached sulfate paper and paperboard used as layer insulation in coils, transformers, and other similar apparatus. The materials may also be used as turn insulation, slot liners, wedges, phase insulation, and separator papers in stranded wire/cable constructions. This specification does not include tissue for manufacture of capacitors. Other commonly used terms for the materials include soft coil wrap, dense coil wrap, kraft coil insulation, dry-finished kraft, and water-finished kraft. The materials covered in this specification are classified into four types according to density range and nominal thickness and should conform to the required values of ash content, alcohol-soluble material content, aqueous extract conductivity, water-soluble chloride content, fiber composition, moisture content, hydrogen ion concentration, pH, tensile strength, dielectric breakdown voltage, and conducting paths.
SCOPE
1.1 This specification covers electrical grade unsized, unbleached sulfate paper and paperboard for use as layer insulation in coils, transformers, and similar apparatus. Other applications may include, but are not limited to, turn insulation, slot liners, wedges, phase insulation, and separator papers in stranded wire/cable constructions. Tissue for the manufacture of capacitors is not included in this specification. Other commonly used designations include:  
1.1.1 Soft Coil Wrap,  
1.1.2 Dense Coil Wrap,  
1.1.3 Kraft Coil Insulation,  
1.1.4 Dry-Finished Kraft, and
1.1.5 Water-Finished Kraft.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

General Information

• Status: Historical
• Publication Date: 30-Sep-2009
• ICS: 29.035.10 - Paper and board insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.01 - Electrical Insulating Products

Relations

• Replaces: ASTM D1305-99(2004) - Standard Specification for Electrical Insulating Paper and Paperboard-Sulfate (Kraft) Layer Type
• Effective Date: 01-Oct-2009
• Referred By: ASTM D4063-99(2022) - Standard Specification for Pressboard for Electrical Insulating Purposes
• Effective Date: 01-Oct-2009

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D1305 −99(Reapproved 2009)
Standard Specification for
Electrical Insulating Paper and Paperboard—Sulfate (Kraft)
Layer Type
This standard is issued under the fixed designation D1305; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Ordering Information
1.1 This specification covers electrical grade unsized, un-
5.1 Orders shall specify the type, including whether water
bleached sulfate paper and paperboard for use as layer insula-
finish or not (see Note 1), nominal thickness, form, width,
tion in coils, transformers, and similar apparatus. Other appli-
length (for sheets), nominal outside diameter, and core inside
cations may include, but are not limited to, turn insulation, slot
diameter (for rolls).
liners, wedges, phase insulation, and separator papers in
NOTE 1—Water finish is not available with certain combinations of
stranded wire/cable constructions. Tissue for the manufacture
Kraft type and thickness. In general, water finish is restricted to paper and
of capacitors is not included in this specification. Other
paperboard in the higher density ranges, that is, Types III and IV.
commonly used designations include:
1.1.1 Soft Coil Wrap,
6. Materials
1.1.2 Dense Coil Wrap,
6.1 Thematerialshallbenaturalunbleachedsulfatepaperor
1.1.3 Kraft Coil Insulation,
paperboard, free of dyes, pigments, fillers, or sizing. It may be
1.1.4 Dry-Finished Kraft, and
furnished either with water-finish or without.
1.1.5 Water-Finished Kraft.
1.2 The values stated in inch-pound units are to be regarded
7. Detail Requirements
as standard. The values given in parentheses are mathematical
7.1 The material shall conform to the chemical, physical,
conversions to SI units that are provided for information only
andelectricalrequirementsspecifiedinTables1-4,whentested
and are not considered standard.
in accordance with the methods prescribed in Section 11.
2. Referenced Documents
8. Interpretation of Numerical Requirements
2.1 ASTM Standards:
D202 Test Methods for Sampling and Testing Untreated
8.1 Unless otherwise stated, all specified limits in this
Paper Used for Electrical Insulation
specification apply to the average of determinations applicable
D1711 Terminology Relating to Electrical Insulation
to a sample as defined.
3. Terminology
9. Workmanship, Finish, and Appearance
3.1 Definitions—For definitions of terms used in this
9.1 The material shall be uniform in thickness, density,
standard, refer to Terminology D1711.
formation, and texture. The material shall be as free of welts,
4. Classification
wrinkles,creases,holes,slimespots,stains,shives,weakspots,
blisters, tears, cuts, and other defects; and from resin, dirt,
4.1 Four types of paper and paperboard are covered by this
carbon, rubber, metal particles, corrosive substances, or other
specification, as shown in Table 1. The material is available in
foreign material, as consistent with good manufacturing pro-
sheets, pads, or rolls.
cesses and in keeping with the requirements of this specifica-
tion.Rollsandpadsshallbecompactlywound.Splicesshallbe
This specification is under the jurisdiction of ASTM Committee D09 on
kept to a minimum. Splicing compounds shall be noncorrosive
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.01 on Electrical Insulating Products. and shall have no deleterious effect on the insulating or
Current edition approved Oct. 1, 2009. Published February 2010. Originally
dielectric values of the paper.
approved in 1954. Last previous edition approved in 2004 as D1305 – 87 (2004).
DOI: 9910.1520/D1305-99R09.
10. Sampling
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
10.1 Sample the paper in accordance with Test Methods
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. D202.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D1305−99 (2009)
TABLE 1 Types of Untreated Kraft Insulating Tissue, Paper, and
carriers for safe transportation at the lowest rate to the point of
Paperboard
delivery, unless otherwise specified in the contract or order.
Type Density Range, Nominal Thickness,
3 12.2 Package Marking—Each container shall be marked on
g/cm mil (µm)
the side or on one end of the package, or on both the side and
I less than 0.77 1 (25) to 30 (760)
II 0.77 to 0.86 0.5 (12) to 30 (760) end, with the name and type of material, specification number,
III 0.86 to 0.95 0.4 (10) to 30 (760)
purchase order number, manufacturer’s name or trade mark, or
IV over 0.95 0.2 (5) to 30 (760)
both, manufacturer’s roll number, lot number, and the date of
manufacture. Each roll or pad shall be marked on one side with
the manufacturer’s name and lot number and the customer’s
TABLE 2 Chemical Requirements
purchase order number.
Property min max
Ash, % . 0.5
13. Retest and Rejection
Alcohol-soluble material, % . 1.0
A
13.1 If the results of any test do not conform to the
Aqueous extract conductivity, mS/m . 1.0
Water-soluble chlorides, ppm . 32
requirements prescribed in this specification, at the option of
Fiber composition: unbleached sulfate, % 100 .
the manufacturer that test shall be repeated on two additional
Moisture, as received, % 4 7
sets of specimens from the same batch or shipment, each of
Moisture, as received, for water finished paper, % 4 9
Hydrogen ion concentration, pH 6.5 8.0
which shall conform to the requirements specified. If either of
A
1 mS/m = 10 µΩ/cm.
these two additional sets of specimens fails, the material may
be rejected at the option of the purchaser.
13.2 Notice of failure of material based on tests made in
accordance with this specification shall be reported to the
11. Test Methods
manufacturer within 3 weeks from receipt of the material by
11.1 The properties of the paper shall be determined in
the purchaser.Any p
...