ASTM D710-97(2002)

Standard Specification for Vulcanized Fibre Sheets, Rods, and Tubes Used for Electrical Insulation

ABSTRACT
This specification covers vulcanized fibres in sheet, round rod, and round tube forms of bone, commercial, and electrical insulation grades. Fibres shall be tested appropriatedly and consequently conform to specified color, chemical composition, flexural strength, impact strength, tearing strength, compressive strength, water absorption, dielectric strength, bursting strength, density, Rockwell hardness, and dimensional and size requirements.
SCOPE
1.1 This specification covers vulcanized fibre (Note 1) sheets, round rods, and round tubes of such grades suitable for use as electrical insulation.
Note 1—The variant spelling "fibre" has been approved by Committee D09 for use in this standard.
1.2 The values stated in inch-pound units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 09-Sep-1997
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.07 - Electrical Insulating Materials

Relations

• Replaces: ASTM D710-97 - Standard Specification for Vulcanized Fibre Sheets, Rods, and Tubes Used for Electrical Insulation
• Effective Date: 10-Sep-1997
• Replaced By: ASTM D710-97(2009)e1 - Standard Specification for Vulcanized Fibre Sheets, Rods, and Tubes Used for Electrical Insulation
• Effective Date: 01-May-2009
• Referred By: ASTM D229-19e1 - Standard Test Methods for Rigid Sheet and Plate Materials Used for Electrical Insulation
• Effective Date: 10-Sep-1997
• Referred By: ASTM D619-21 - Standard Test Methods for Vulcanized Fibre Used for Electrical Insulation
• Effective Date: 10-Sep-1997

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: D 710 – 97 (Reapproved 2002)
Standard Specification for
Vulcanized Fibre Sheets, Rods, and Tubes Used for
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Electrical Insulation
This standard is issued under the fixed designation D710; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.1.1 Discussion—The zinc chloride is subsequently re-
moved by leaching. The resulting product, after being dried
1.1 This specification covers vulcanized fibre (Note 1)
and finished by calendering, is a material of partially regener-
sheets, round rods, and round tubes of such grades suitable for
ated cellulose in which the fibrous structure is retained in
use as electrical insulation.
varying degrees depending on the grade of paper used and on
NOTE 1—The variantspelling“fibre”hasbeenapprovedbyCommittee
the processing conditions. Material up to about 25 mm in
D09 for use in this standard.
thickness is produced by bonding multiple layers of paper (or
1.2 The values stated in inch-pound units are to be regarded
board) after chemical treatment. Vulcanized fibre does not
as the standard.
contain vulcanized rubber or sulfur as the name might imply.
Thin vulcanized fibre has sometimes been termed “fish paper.”
2. Referenced Documents
4. Grades
2.1 ASTM Standards:
D495 Test Method for High-Voltage, Low-Current, Dry
4.1 Threegradesofvulcanizedfibrearecovered,asfollows:
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Arc Resistance of Solid Electrical Insulation
4.1.1 Bone Grade—This grade is characterized by the
D619 Test Methods for Vulcanized Fibre Used for Electri-
greater hardness and stiffness associated with higher density. It
2
cal Insulation
machinesmoresmoothlyandwithlesstendencytoseparatethe
D696 Test Method for Coefficient of Linear Thermal Ex-
plies in difficult machining operations than the other grades. It
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pansion of Plastics Between−30°C and 30°C With a
is made in thickness of ⁄32 to ⁄4in. (0.79 to 6.35 mm).
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Vitreous Silica Dilatometer
4.1.2 Commercial Grade—This grade is considered as the
D952 Test Method for Bond or Cohesive Strength of Sheet
general-purpose grade and is sometimes referred to as me-
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Plastics and Electrical Insulating Materials
chanical and electrical grade. It possesses good physical and
D3636 Practice for Sampling and Judging Quality of Solid
electrical properties and can be fabricated satisfactorily by
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Electrical Insulating Materials
punching, turning, and forming operations. It is made in
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2.2 Other Documents:
thicknesses from 0.010 to ⁄4 in. (0.25 to 6.35 mm).
IEEE Publication No. 1, “General Principles for Tempera-
4.1.3 Electrical Insulation Grade—This grade is intended
ture Limits in the Rating of Electrical Equipment.”
primarily for electrical applications and others involving diffi-
cult bending or forming operations. It is made in thicknesses
3. Terminology
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from 0.004 to ⁄8 in. (0.10 to 3.2 mm). Thin material of this
3.1 Definitions:
grade is sometimes referred to as “fish paper.”
3.1.1 vulcanized fibre, n—a material made from chemically
4.2 Thethreegradesoffibreareavailableinlaminatedsheet
gelatinized cellulosic paper or board using zinc chloride as the
form in greater thicknesses than those listed in 4.1.1 to 4.1.3.
gelatinizing agent.
Laminated (or built-up) fibre is composed of a number of plies
bondedtogetherwithasuitableadhesive.Itretainsallthebasic
properties of solid fibre, including high arc resistance on edges
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This specification is under the jurisdiction of ASTM Committee D09 on
and faces, and in addition has better dimensional stability and
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.07 on Flexible and Rigid Insulating Materials.
less warpage. Laminated fibre is usually furnished when the
Current edition approved Sept. 10, 1997. Published November 1997. Originally
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thickness is over ⁄4 in. (6.35 mm), and may be furnished in
published as D710 – 43 T. Last previous edition D710–96.
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2 thicknesses down to ⁄8 in. (3.2 mm). Thicknesses up to 4 in.
Annual Book of ASTM Standards, Vol 10.01.
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(102 mm) are commercially available.
Annual Book of ASTM Standards, Vol 08.01.
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Annual Book of ASTM Standards, Vol 10.02.
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Available from The Institute of Electrical and Electronics Engineers, Inc., 445
Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 710 – 97 (2002)
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TABLE 2 Chemical Requirements
4.3 Thin sheet ma
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