ASTM D1577-07(2018)
(Test Method)Standard Test Methods for Linear Density of Textile Fibers
Standard Test Methods for Linear Density of Textile Fibers
SIGNIFICANCE AND USE
4.1 Option A for bundle weighing of Test Method D1577 is used in the trade for acceptance testing of commercial shipments. Option B for single-fiber weighing and Option C for the vibroscope may be used for acceptance testing (see Section 37); however, caution is advised when using Option B or Option C because between-laboratory precision information is incomplete. Comparative tests as directed in 4.1.1 may be advisable.
4.1.1 In case of dispute arising from differences in reported test results when using Test Method D1577 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of samples that are as homogeneous as possible and that are from a lot of material of the type in question. These samples should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using the appropriate statistical analysis and a probability level chosen by the two parties before testing is begun. If a bias is found, either the cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results for that material with consideration to the known bias.
4.2 Option A for bundle weighing is generally considered to be the referee procedure for acceptance testing.
4.3 Option A is not recommended for measurement of linear density of blends of production fibers having different nominal linear densities.
4.4 The accuracy of the linear density values obtained by Options A and B is dependent upon the accuracy with which the fibers can be cut and weighed.
Note 2: On short staple fiber, an accuracy in cutting of 1.0 % is difficult to obtain. This problem is further complicated if crimp is present in the fibers. ...
SCOPE
1.1 These test methods cover the measurement of mass per unit length (linear density) of textile fibers and filaments. Direct weighing and vibroscope procedures with modifications for crimped and uncrimped fibers are included. The options and sections are listed below.
Option
Sections
A—Fiber Bundle Weighing
7 – 15
B—Single-Fiber Weighing
16 – 23
C—Vibroscope, General
24 – 30
35 and 36
C1—Uncrimped Fibers
31 and 32
C2—Crimped Fibers
33 and 34
Precision and Bias
37 and 38
Note 1: For linear density of short lengths of yarn, refer to Test Method D1059. For cotton linear density, refer to Test Methods D1769 and D2480. For measurement of wool diameter, refer to Test Methods D1282, D2130, and D3510.
1.2 The crimp, taper, and cross-sectional shape of the fiber may influence the linear density measured by single-fiber weighing and vibroscope.
1.3 These test methods measure the linear density of fibers with moisture in equilibrium with the standard atmosphere for testing textiles. The fiber moisture under these conditions is not necessarily the same as the commercial moisture regain for the fibers.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.5 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.
1.6 This international standard was developed in accordance with internationally recognized pr...
General Information
Relations
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: D1577 − 07 (Reapproved 2018)
Standard Test Methods for
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Linear Density of Textile Fibers
This standard is issued under the fixed designation D1577; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 These test methods cover the measurement of mass per
1.6 This international standard was developed in accor-
unit length (linear density) of textile fibers and filaments.
dance with internationally recognized principles on standard-
Direct weighing and vibroscope procedures with modifications
ization established in the Decision on Principles for the
for crimped and uncrimped fibers are included. The options
Development of International Standards, Guides and Recom-
and sections are listed below.
mendations issued by the World Trade Organization Technical
Option Sections
Barriers to Trade (TBT) Committee.
A—Fiber Bundle Weighing 7–15
B—Single-Fiber Weighing 16–23
2. Referenced Documents
C—Vibroscope, General 24–30
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2.1 ASTM Standards:
35 and 36
C1—Uncrimped Fibers 31 and 32
D123 Terminology Relating to Textiles
C2—Crimped Fibers 33 and 34
D629 Test Methods for Quantitative Analysis of Textiles
Precision and Bias 37 and 38
D1059 Test Method for Yarn Number Based on Short-
NOTE 1—For linear density of short lengths of yarn, refer to Test
Length Specimens
Method D1059. For cotton linear density, refer to Test Methods D1769
D1282 Test Method for Resistance to Airflow as an Indica-
and D2480. For measurement of wool diameter, refer to Test Methods
tion ofAverage Fiber Diameter of Wool Top, Card Sliver,
D1282, D2130, and D3510.
and Scoured Wool
1.2 The crimp, taper, and cross-sectional shape of the fiber
D1769 Test Method for Linear Density of Cotton Fibers
may influence the linear density measured by single-fiber
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(Array Sample) (Withdrawn 1988)
weighing and vibroscope.
D1776/D1776M Practice for Conditioning and Testing Tex-
1.3 These test methods measure the linear density of fibers
tiles
with moisture in equilibrium with the standard atmosphere for
D1907/D1907M Test Method for Linear Density of Yarn
testingtextiles.Thefibermoistureundertheseconditionsisnot
(Yarn Number) by the Skein Method
necessarily the same as the commercial moisture regain for the
D2130 Test Method for Diameter ofWool and OtherAnimal
fibers.
Fibers by Microprojection
D2257 Test Method for Extractable Matter in Textiles
1.4 The values stated in either SI units or inch-pound units
D2258/D2258M Practice for Sampling Yarn for Testing
are to be regarded separately as standard. The values stated in
D2480 Test Method for Maturity Index and Linear Density
each system are not exact equivalents; therefore, each system
of Cotton Fibers by the Causticaire Method (Withdrawn
shall be used independently of the other. Combining values
3
1992)
from the two systems may result in nonconformance with the
D2904 Practice for Interlaboratory Testing of a Textile Test
specification.
Method that Produces Normally Distributed Data (With-
1.5 This standard does not purport to address all of the
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drawn 2008)
safety concerns, if any, associated with its use. It is the
D3333 Practice for Sampling Manufactured Staple Fibers,
responsibility of the user of this standard to establish appro-
Sliver, or Tow for Testing
1 2
These test methods are under the jurisdiction of ASTM Committee D13 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Textiles and are the direct responsibility of Subcommittee D13.58 on Yarns and contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Fibers. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved July 1, 2018. Published July 2018. Originally approved the ASTM website.
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in 1958. Last previous edition approved in 2012 as D1577 – 07 (2012). DOI: The last approved version of this historical standard is referenced on
10.1520/D1577-07R18. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D1577 − 07 (2018)
D3510 Test Method for Diameter ofWool and OtherAnimal 4.4.1 The accuracy of weighing can be controlled by the
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Fibers by Image Analy
...
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