1、ASTM D32Li 7 B 0757530 0023337 b Designation:D 1284-87 fl-37-m I AMERICAN SOCIETY FOR TESTING APO MATERIALS 1916 Race St.,Philadelphia,Pa.19103 Reprinted from the Annual Book of ASTM Standards,Copyright ASTM If not listed In the current combined index,will appear in the next editio?.Standard Test Me
2、thods for RELAXATION AND CONSOLIDATION DIMENSIONAL CHANGES OF STABILIZED KNIT WOOL FABRICS This standard is issued under the fixed designation D 1284;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
3、 in parentheses indicates the year of last reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 These test methods cover the accelerated determination of the relaxation and the consoli-dation dimensional change of knit fabrics that includ
4、e at least 50%wool,and are designed to be shrink-resistant.The knit fabrics to be tested by these methodsinclude those used in manufac-turing underwear,outerwear,and sweaters.1.2 The methods appear in the following sec-tions:Sections Relaxation Dimensional Change 6 to 13 Consolidation Dimensional Ch
5、ange 14 to 21 1.3 The values stated in SI units are to be regarded as the standard.i.4 This standard may involve hazardous ma-terials,operations,and equipment.This standard does not purport to address all o f the safetyprob-lems associated with its use.It is the responsibil-ity o f the user o f this
6、 standard to establish appro-priate safety and health practices and determine the applicability o f regulatory limitations prior to use.2.Referenced Documents 2.1 ASTM Standards:D 123 Terminology Relating to Textiles2 D 1776 Practice for Conditioning Textiles for Testing*D 1905 Test Method for Dimen
7、sional Changes in Laundering of Woven or Knitted Textiles3 2.2 Other Documents:Fed.Std.No.75 la Stitches,Seams,and Sew-ing4 IS0 Method 38/2 N79 Dimensional Changes(Shrinkage),Felting and Relaxation,of Woven of Knitted Wool Textiles in Wetting5 IS0 Method 3812 NI00 Dimensional Change 3.Definitions 3.
8、1 consolidation dimensional change,n-the dimensional change that occurs when a knitted fabric is gently agitated in water to overcome all the frictional constraints in the fabric after it has been immersed in water without agitation to cause the relaxation dimensional change.3.2 felting dimensional
9、chlange,n-the irre-versible dimensional change that occurs in a relaxed fabric when it is subjected to agitation in laundering as specified in Test Method D 1905.3.3 frictional constraint,n-the force imposed by the multitude of fiber to fiber contacts within a fabric.3.4 relaxation dimensional chang
10、e,n-the di-mensional change that occurs when a knitted fabric is immersed in water without agitation and the strains and tensions put into fibers,yams,or fabrics during previous processing stages such as spinning,knitting,and finishing are relieved.3.5 For definitions of other textile terms used in
11、these test methods,refer to Terminology D 123.These test methods are under the jurisdiction of ASTM Committee D-13 on Textiles,and are the direct responsibility of Subcommittee D13.59 on Fabric Test Methods,General.Current edition approved July 31,1987.Published Septem-ber 1987.Originally published
12、as D 1284-53 T.Last previous editionD l284-76(1981).2Aiinual Book ofASTMStandards,Vols 07.01 and 07.02.Discontinued,s e e 1977 Annual Book ofASTMStandards,Part 32.Fed.Std.No.751a,Jan.25,1965,superseding Federal Specification DD-S-75 I.Available from Naval Publications and Forms Center,5801 Tabor Ave
13、.,PA 19120.Available from Amencan National Standards Institute,1430 Broadway,New York,NY 10018.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.-4m ASTM DI284 87 a _-4.Summary of Test Meth
14、ods 4.1 Summaries of the specific test methods used for the different tests are given in the appro-priate sections.5.Uses and Significance 5.1 Dimensional changes in laundering may be objectionable to the uItimate consumer of a garment,but the user is not likely to be interested in any scheme for di
15、viding dimensional change into components according to their origin.How-ever,such an analysis will be invaluable to a producer,since it allows the producer to make appropriate changes in the design and processing of fabrics to reduce their tendency to change dimensionally when washed.5.2 Knit fabric
16、s that contain at least 50%wool,can become so distorted by mechanical manipulation and wet finishing at high temper-ature that they lose all tendency to revert to their original dimensions until free of strains and ten-sions.As a consequence,it can be expected that garments of these fabrics may show objectionable dimensional change when washed.Therefore,with some fabrics,it may be necessary for the producer to release the strains and tensions by exposing them to water or steam at a higher temper