ASTM D1577-07(2012)
(Test Method)Standard Test Methods for Linear Density of Textile Fibers
Standard Test Methods for Linear Density of Textile Fibers
SIGNIFICANCE AND USE
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.
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.
Option A for bundle weighing is generally considered to be the referee procedure for acceptance testing.
Option A is not recommended for measurement of linear density of blends of production fibers having different nominal linear densities.
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.
The accuracy of weighing ...
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.
OptionSections AFiber Bundle Weighing 7-15 BSingle-Fiber Weighing16-23 CVibroscope, General24-30 35 and 36 C1Uncrimped Fibers31 and 32 C2Crimped Fibers33 and 34 Precision and Bias37 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 D1769and . For measurement of wool diameter, refer to Test Methods D1282, D2130 and .
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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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: D1577 − 07 (Reapproved 2012)
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 and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 These test methods cover the measurement of mass per
unit length (linear density) of textile fibers and filaments.
2. Referenced Documents
Direct weighing and vibroscope procedures with modifications
for crimped and uncrimped fibers are included. The options 2
2.1 ASTM Standards:
and sections are listed below.
D123 Terminology Relating to Textiles
Option Sections
D629 Test Methods for Quantitative Analysis of Textiles
D1059 Test Method for Yarn Number Based on Short-
A—Fiber Bundle Weighing 7–15
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B—Single-Fiber Weighing 16–23
Length Specimens (Withdrawn 2010)
C—Vibroscope, General 24–30
D1282 Test Method for Resistance to Airflow as an Indica-
35 and 36
tion ofAverage Fiber Diameter of Wool Top, Card Sliver,
C1—Uncrimped Fibers 31 and 32
C2—Crimped Fibers 33 and 34
and Scoured Wool
Precision and Bias 37 and 38
D1769 Test Method for Linear Density of Cotton Fibers
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NOTE 1—For linear density of short lengths of yarn, refer to Test
(Array Sample) (Withdrawn 1988)
MethodD1059.Forcottonlineardensity,refertoTestMethodsD1769and
D1776 Practice for Conditioning and Testing Textiles
D2480. For measurement of wool diameter, refer to Test Methods D1282,
D1907 Test Method for Linear Density of Yarn (Yarn Num-
D2130 and D3510.
ber) by the Skein Method
1.2 The crimp, taper and cross-sectional shape of the fiber
D2130 Test Method for Diameter ofWool and OtherAnimal
may influence the linear density measured by single-fiber
Fibers by Microprojection
weighing and vibroscope.
D2257 Test Method for Extractable Matter in Textiles
1.3 These test methods measure the linear density of fibers
D2258 Practice for Sampling Yarn for Testing
with moisture in equilibrium with the standard atmosphere for
D2480 Test Method for Maturity Index and Linear Density
testingtextiles.Thefibermoistureundertheseconditionsisnot
of Cotton Fibers by the Causticaire Method (Withdrawn
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necessarily the same as the commercial moisture regain for the
1992)
fibers.
D2904 Practice for Interlaboratory Testing of a Textile Test
1.4 The values stated in either SI units or inch-pound units Method that Produces Normally Distributed Data (With-
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are to be regarded separately as standard. The values stated in drawn 2008)
each system are not exact equivalents; therefore, each system
D3333 Practice for Sampling Manufactured Staple Fibers,
shall be used independently of the other. Combining values
Sliver, or Tow for Testing
from the two systems may result in nonconformance with the
D3510 Test Method for Diameter ofWool and OtherAnimal
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specification.
Fibers by Image Analyzer (Withdrawn 1986)
1.5 This standard does not purport to address all of the D4849 Terminology Related to Yarns and Fibers
safety concerns, if any, associated with its use. It is the D5103 Test Method for Length and Length Distribution of
responsibility of the user of this standard to establish appro- Manufactured Staple Fibers (Single-Fiber Test)
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, 2012. Published August 2012. Originally the ASTM website.
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approved in 1958. Last previous edition approved in 2007 as D1577 – 07. DOI: The last approved version of this historical standard is referenced on
10.1520/D1577-07R12. 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 (2012)
2.2 ASTM Adjuncts: 4.5 OptionsAand B are fundamental procedures which are
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TEX-PAC used to standardize the vibroscope equipment used in Options
C1 and C2.
3. Terminology
4.6 Test Method Options B and C are most useful for the
3.1 For all terminology relating to D13.58, Yarns and
measurement of linear density of single fibers when further
Fibers, refer to Terminology D4849.
tests upon the same test specime
...
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