ASTM D7812-22

Standard Test Method for Tensile Testing of Aramid Paper

SIGNIFICANCE AND USE
5.1 The levels of tensile properties obtained when testing aramid paper are dependent on the age and history of the specimen and on the specific conditions used during the test. Among these conditions are rate of stretching, type of clamps, gauge length of specimen, temperature and humidity of the atmosphere, rate of airflow across the specimen, and temperature and moisture content of the specimen. Testing conditions accordingly are specified precisely to obtain reproducible test results on a specific sample.  
5.2 Tensile strength is used in engineering calculations when designing various types of products.  
5.3 Elongation of the paper is taken into consideration in the design and engineering of reinforced products because of its effect on uniformity of the finished product and its dimensional stability during service.  
5.4 Stiffness is a measure of the resistance of the paper to extension as a force is applied.  
5.5 Tensile Energy Absorption is dependent on the relationship of force to elongation. It is a measure of the ability of a textile structure to absorb mechanical energy. Tensile Energy Absorption is work-to-break per area.  
5.6 It should be emphasized that, although the preceding parameters are related to the performance of the product, the actual configuration of the product is significant. Shape, size, and internal construction also can have appreciable effects on product performance. It is not possible, therefore, to evaluate the performance of the end product in terms of the reinforcing material alone.  
5.7 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, test samples should be used that are as homogeneous as possible, that are drawn from the material from which the disparate test results were obtained, and that are randomly assign...
SCOPE
1.1 This test method covers the tensile testing of aramid paper with thickness less than 1 mm. This test method includes testing procedures only and includes no specifications or tolerances.  
1.2 The procedures given in this test method are for use with computer-controlled constant-rate-of-elongation tensile testing equipment.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Oct-2022
• ICS: 59.100.30 - Aramide materials
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.19 - Industrial Fibers and Metallic Reinforcements

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7812 − 22
Standard Test Method for
1
Tensile Testing of Aramid Paper
This standard is issued under the fixed designation D7812; 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 D4848 Terminology Related to Force, Deformation and
Related Properties of Textiles
1.1 This test method covers the tensile testing of aramid
D6477 Terminology Relating to Tire Cord, Bead Wire, Hose
paper with thickness less than 1 mm.This test method includes
Reinforcing Wire, and Fabrics
testing procedures only and includes no specifications or
E691 Practice for Conducting an Interlaboratory Study to
tolerances.
Determine the Precision of a Test Method
1.2 Theproceduresgiveninthistestmethodareforusewith
E177 Practice for Use of the Terms Precision and Bias in
computer-controlled constant-rate-of-elongation tensile testing
ASTM Test Methods
equipment.
1.3 The values stated in SI units are to be regarded as 3. Terminology
standard. No other units of measurement are included in this
3.1 Definitions—The following terms are relevant to this
standard.
standard: aramid paper, breaking force, elongation, initial
1.4 This standard does not purport to address all of the
modulus, tensile strength, and Tensile Energy Absorption.
safety concerns, if any, associated with its use. It is the
3.1.1 For definitions of terms related to industrial fibers and
responsibility of the user of this standard to establish appro-
metallic reinforcements, refer to Terminology D6477.
priate safety, health, and environmental practices and deter-
3.1.2 For definitions of terms related to force and deforma-
mine the applicability of regulatory limitations prior to use.
tion in textiles, refer to Terminology D4848.
1.5 This international standard was developed in accor-
3.1.3 For definitions of other terms related to textiles, refer
dance with internationally recognized principles on standard-
to Terminology D123.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Summary of Test Method
mendations issued by the World Trade Organization Technical
4.1 A conditioned sample of aramid paper is clamped in a
Barriers to Trade (TBT) Committee.
tensile testing machine and then stretched or loaded until
2. Referenced Documents
broken.
2
2.1 ASTM Standards:
4.2 The output of a constant-rate-of-extension (CRE) tensile
D76 Specification for Tensile Testing Machines for Textiles
testingmachinecanbeconnectedwithelectronicrecordingand
D123 Terminology Relating to Textiles
computing equipment, which may be programmed to calculate
D202 Test Methods for Sampling and Testing Untreated
and print the test results of tensile properties of interest.
Paper Used for Electrical Insulation
4.3 Breaking force and elongation are determined directly.
D374M Test Methods for Thickness of Solid Electrical
Modulus and Tensile Energy Absorption are calculated from
3
Insulation (Metric) (Withdrawn 2016)
the force-elongation curve.
D1776 Practice for Conditioning and Testing Textiles
5. Significance and Use
1
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
5.1 The levels of tensile properties obtained when testing
and is the direct responsibility of Subcommittee D13.19 on Industrial Fibers and
Metallic Reinforcements.
aramid paper are dependent on the age and history of the
Current edition approved Nov. 1, 2022. Published December 2022. Originally
specimen and on the specific conditions used during the test.
approved in 2016. Last previous edition approved in 2016 as D3512 – 16. DOI:
Among these conditions are rate of stretching, type of clamps,
10.1520/D7812-22.
2
gauge length of specimen, temperature and humidity of the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
atmosphere, rate of airflow across the specimen, and tempera-
Standards volume information, refer to the standard’s Document Summary page on
ture and moisture content of the specimen. Testing conditions
the ASTM website.
3
accordingly are specified precisely to obtain reproducible test
The last approved version of this historical standard is referenced on
www.astm.org. results on a specific sample.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D781
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7812 − 16 D7812 − 22
Standard Test Method for
1
Tensile Testing of Aramid Paper
This standard is issued under the fixed designation D7812; 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
1.1 This test method covers the tensile testing of aramid paper with thickness less than 1 mm. This test method includes testing
procedures only and includes no specifications or tolerances.
1.2 The procedures given in this test method are for use with computer-controlled constant-rate-of-elongation tensile testing
equipment.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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.
1.4 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D76 Specification for Tensile Testing Machines for Textiles
D123 Terminology Relating to Textiles
D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation
3
D374M Test Methods for Thickness of Solid Electrical Insulation (Metric) (Withdrawn 2016)
D1776 Practice for Conditioning and Testing Textiles
D4848 Terminology Related to Force, Deformation and Related Properties of Textiles
D6477 Terminology Relating to Tire Cord, Bead Wire, Hose Reinforcing Wire, and Fabrics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.19 on Industrial Fibers and Metallic
Reinforcements.
Current edition approved Jan. 1, 2016Nov. 1, 2022. Published February 2016December 2022. Originally approved in 2016. Last previous edition approved in 2016 as
D3512 – 16. DOI: 10.1520/D7812–16.10.1520/D7812-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7812 − 22
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
3. Terminology
3.1 For definitions of other terms related to textiles, refer to Terminology D123.
3.1 Definitions—For definitions of terms related to force and deformation in textiles, refer to Terminology The following terms
are relevant to this standard: aramid paper, breaking force, elongation, initial modulus, tensile strength, and Tensile Energy
Absorption.D6477.
3.1.1 For definitions of terms related to industrial fibers and metallic reinforcements, refer to Terminology D6477.
3.1.2 For definitions of terms related to force and deformation in textiles, refer to Terminology D4848.
3.1.3 For definitions of other terms related to textiles, refer to Terminology D123.
3.3 Definitions:
3.3.1 aramid paper, n—planar structures deposited from an aqueous suspension that has a thickness less than 1 mm containing at
least 50 mass percent aramid.
3.4 The following terms are relevant to this standard: breaking force, elongation, initial modulus, tensile strength, and Tensile
Energy Absorption.
4. Summary of Test Method
4.1 A conditioned sample of aramid paper is clamped in a tensile testing
...