1、Designation:D517115Standard Test Method forImpact Resistance of Plastic Sew-Through Buttons1This standard is issued under the fixed designation D5171;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of impactresistance of plastic sew-through buttons.1.2 The values stated in either acceptable metric uni
3、ts orother units shall be regarded separately as standard.The valuesexpressed in each system may or may not be exact equivalents:therefore,each system must be used independently of the other,without combining values in any way.1.3 This standard does not purport to address all of thesafety concerns,i
4、f any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD618 Practic
5、e for Conditioning Plastics for TestingD2050 Terminology Relating to Fasteners and ClosuresUsed with Textiles3.Terminology3.1 Definitions:3.1.1 For definitions of button terms used in this testmethod,refer to Terminology D2050.3.1.1.1 The following terms are relevant to this standard:button,face,imp
6、act resistance,ligne size,sew-through flangebuttons.3.1.2 For other textile terminology used in this test method,refer to Terminology D123.4.Summary of Test Method4.1 Individual buttons are placed on a surface centeredunder a tube through which a preselected mass falls from apreselected height.After
7、 the mass impacts the button theimpacted button is removed and visually examined using a 5Xmagnifying glass for breakage,cracking,or chipping.5.Significance and Use5.1 This test method may be used to determine the ability ofa button to resist breaking under impact,for example inpressing the end item
8、,which could cause the button to fail.NOTE1In the development of this test method it was found that thefollowing factors influenced the ability of a button to resist failure underimpact conditions:resin formulation,shape ligne size,thickness,numberand spacing of holes.Buttons may also pass this test
9、 but fail during thepressing of a garment due to the presence of heat during pressing.5.1.1 If there are differences of practical significance be-tween the reported test results for two laboratories(or more),comparative tests should be performed to determine if there isa statistical bias between the
10、m,using competent statisticalassistance.As a minimum,test samples should be used that areas homogeneous as possible,that are drawn from the materialfrom which the disparate rest results were obtained,and thatare randomly assigned in equal numbers to each laboratory fortesting.Other materials with es
11、tablished test values may beused for this purpose.The test results from the two laboratoriesshould be compared using a statistical test for unpaired data,ata probability level chosen prior to the testing series.If a bias isfound,either its cause must be found and corrected,or futuretest results must
12、 be adjusted in consideration of the knownbias.5.2 Test Method D5171 for the determination of the impactresistance of buttons may be used for acceptance testing ofcommercial shipments of buttons but caution is advisable sinceinformation is lacking on precision.6.Apparatus6.1 Impact Resistance Testin
13、g MachineThe impact resis-tance tester consists of a tube through which a plunger ofstandard mass drops onto the button from a predeterminedheight.The button is centrally positioned based on ligne size,by means of a locating jig,on a flat metal surface.The energyof impact is determined by the mass o
14、f the plunger and theheight of the drop.6.2 Magnifying Glassa 5X magnifying glass is used tovisually examine the buttons after impact.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.54 on Subassemblies.Current edition a
15、pproved Jan.15,2015.Published September 2015.Originallyapproved in 1991.Last previous edition approved in 2009 as D517109a.DOI:10.1520/D5171-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volum
16、e information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.3 Measuring Devicemeasuring calipers or micrometer,to determine the ligne size of buttons.7.Sampling7.1 Laboratory SampleAs a laboratory sample,randomlyselect a quantity of buttons,approximately 100 to 200,from acarton and from contained boxes,that adequately representsthe material,from which test specimens m
