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ASTM D 202 Document Information:
Title
Standard Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation
ASTM International
Publication Date:
May 1, 2008
Scope:
These test methods cover procedures for sampling and testing
untreated paper to be used as an electrical insulator or as a
constituent of a composite material used for electrical insulating
purposes.
Untreated papers are thin, fibrous sheets normally laid down
from a water suspension of pulped fibers (usually cellulosic),
which may contain various amounts of nonfibrous ingredients, and
which are calendared, if required, to obtain desired thickness and
density. Nevertheless, these test methods are applicable, generally
although not invariably, to papers formed by other means, to papers
modified (during or after formation) by additions, and to papers
given subsequent mechanical treatments such as creping.
As an electrical insulating and dielectric material, paper is
considered "untreated" until it is subjected to a manufacturing
process such as drying, impregnation, or varnish treatment.
The test methods given herein were developed specifically for
papers having a thickness of 0.75 mm (0.030 in.) or less. A number
of these test methods are also suitable for use on other materials
such as pulps or boards. Refer to Test Methods D 3376 or Methods D
3394 to determine which tests are applicable to pulps or electrical
insulating boards. In the paper industry, some products in
thicknesses of less than 0.75 mm are termed "paperboard". Such
products are included within the scope of these methods.
These test methods are applicable to flexible fibrousmat
materials formed from suspensions of fiber in fluids other than
water. These mats may have thicknesses approaching 2 mm, and may
contain fibers that are natural, synthetic, organic, or inorganic;
fillers that are natural, synthetic, organic, or inorganic; and
flexible polymeric binder materials.
The tests for Holes and Felt Hair Inclusions and the Stain Test
for Fine Pores, have been removed from this compilation of test
methods. These test methods were specific to grades of capacitor
paper formerly covered by Specification D 1930, which has been
withdrawn.
NOTE 1—This compilation of test methods is closely related to
IEC Publication 60554-2. Not all of the individual methods included
herein are included in IEC 60554-2, nor are all of the methods in
IEC 60554-2 included in this standard. The individual procedures as
described in the two standards are in general sufficiently close to
each other that it is reasonable to expect that test results
obtained by most of the procedures specified in either standard
will not differ significantly. However, before assuming that a
procedure in these test methods is exactly equivalent to an IEC
60554-2 procedure, the written procedures should be compared
closely, and if it seems advisable, test results by the two
procedures should be compared.
The values stated in SI 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.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. See 43.2.1, 71.1, 143.1, 148.1 and
156.1 for specific hazards.
*A Summary of Changes section appears at the end of this
standard.
Keywords:
- absorption
- acidity
- air resistance
- alkalinity
- aqueous extract conductivity
- aqeous extract pH
- ash content
- basis weight
- board
- bursting strength
- chloride content
- conditioning
- conducting paths
- density
- dielectric strength
- dimensions
- dissipation factor
- edge-tearing resistance
- fiber analysis
- folding endurance
- grammage
- heat stability
- impregnation time
- internal-tearing resistance
- moisture content
- paper
- paper-board
- particulate copper
- particulate iron
- permittivity
- pH
- roll dimensions
- sampling
- sheet dimensions
- silver tarnishing
- solvent-soluble content
- specific gravity
- surface friction
- tensile properties
- tearing resistance
- thickness
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