1、Designation: D5171 09aD5171 15Standard 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 revi
2、sion. A number 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 impact resistance of plastic sew-through buttons.1.2 The values stated in either a
3、cceptable metric units or other 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
4、 of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relati
5、ng to TextilesD618 Practice for Conditioning Plastics for TestingD5497D2050 Terminology Relating to ButtonsFasteners and Closures Used with Textiles (Withdrawn 2011)3. Terminology3.1 Definitions:3.1.1 button, na knob, disc, or similar object which when forced through a narrow opening or buttonhole,
6、fastens one part ofa garment or other flexible substrate to another (See also sew-through button)3.1.1.1 DiscussionAlthough the primary purpose of buttons is to serve as fasteners, buttons can also be used as decoration.3.1.2 face, nin buttons, that portion which will be exposed after attaching to t
7、he substrate.3.1.3 impact resistance, nresistance to fracture under the sudden application of an external force.3.1.4 ligne size, nan English unit, used to measure buttons, one ligne equals 0.635 mm (0.025in).3.1.5 sew-through buttons, na button that has two or more holes on its face for passage of
8、a needle and thread or possibly othermaterial in order to attach it to a flexible substrate.3.1.1 For other textile terminology definitions of button terms used in this test method, refer to Terminology D123D2050.3.1.1.1 The following terms are relevant to this standard: button, face, impact resista
9、nce, ligne size, sew-through flange buttons.3.1.2 For definitions of button terms other textile terminology used in this test method, refer to Terminology D5497D123.4. Summary of Test Method4.1 Individual buttons are placed on a surface centered under a tube through which a preselected mass falls fr
10、om a preselectedheight. After the mass impacts the button the impacted button is removed and visually examined using a 5X magnifying glass forbreakage, cracking, or chipping.1 This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommitte
11、e D13.54 on Subassemblies.Current edition approved April 1, 2009Jan. 15, 2015. Published May 2009 September 2015. Originally approved in 1991. Last previous edition approved in 2009 asD517109.09a. DOI: 10.1520/D5171-09A.10.1520/D5171-15.2 For referencedASTM standards, visit theASTM website, www.astm
12、org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what cha
13、nges have been made to the previous version. Becauseit 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 versionof the standard as published by ASTM is to be considered the offi
14、cial document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Significance and Use5.1 This test method may be used to determine the ability of a button to resist breaking under impact, for example in pressingthe end item, which cou
15、ld cause the button to fail.NOTE 1In the development of this test method it was found that the following factors influenced the ability of a button to resist failure under impactconditions: resin formulation, shape ligne size, thickness, number and spacing of holes. Buttons may also pass this test b
16、ut fail during the pressing ofa garment due to the presence of heat during pressing.5.1.1 If there are differences of practical significance between the reported test results for two laboratories (or more),comparative tests should be performed to determine if there is a statistical bias between them
17、 using competent statisticalassistance.As a minimum, test samples should be used that are as homogeneous as possible, that are drawn from the material fromwhich the disparate rest results were obtained, and that are randomly assigned in equal numbers to each laboratory for testing.Other materials w
18、ith established test values may be used for this purpose. The test results from the two laboratories should becompared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, eitherits cause must be found and corrected, or future tes
19、t results must be adjusted in consideration of the known bias.5.2 Test Method D5171 for the determination of the impact resistance of buttons may be used for acceptance testing ofcommercial shipments of buttons but caution is advisable since information is lacking on precision.6. Apparatus6.1 Impact
20、 Resistance Testing MachineThe impact resistance tester consists of a tube through which a plunger of standardmass drops onto the button from a predetermined height. The button is centrally positioned based on ligne size, by means of alocating jig, on a flat metal surface. The energy of impact is de
21、termined by the mass of the plunger and the height of the drop.6.2 Magnifying Glassa 5X magnifying glass is used to visually examine the buttons after impact.6.3 Measuring Devicemeasuring calipers or micrometer, to determine the ligne size of buttons.7. Sampling7.1 Laboratory SampleAs a laboratory s
22、ample, randomly select a quantity of buttons, approximately 100 to 200, from a cartonand from contained boxes, that adequately represents the material, from which test specimens may be selected.7.2 Test SpecimensRandomly select 15 buttons from the laboratory sample for testing. If test specimens are
23、 submitted forpreproduction approval, testing 1 dozen buttons is acceptable.8. Conditioning8.1 Condition the specimens as directed in Practice D618 using procedure E. Following conditioning, prepare the specimens fortesting as instructed in 9.4 of practice D618. Preconditioning is not required.9. Pr
24、ocedure9.1 Determine Button Ligne SizeUse a button gauge (Fig. 2), a set of calipers or micrometer to measure the outside width ofthe button at the widest point. If your measuring tool is in MM, divide the diameter by 0.635, then record the ligne size in thenearest whole number.9.2 Standard button s
25、izes are: 12L, 14L 16L 18L 20L 22L 24L 28L 30L 32L 34L 36L 40L 42L 44L 48L 54L 60L 70L; othersizes can be achieved by cutting them to specific specifications.9.3 Determine Impact ResistancePlace specimen in centering device for ligne size of button so it lies at the center of thevertical tube. Allow
26、 the mass to fall from a predetermined and reproducible height onto the button. Lift the mass and remove thespecimen from the metal base.10. Evaluation10.1 Visually examine the tested specimens with a 5X magnifying glass for cracking, chipping, and breakage, any of whichconstitutes damage. Test the
27、remaining specimens.FIG. 2 Button GuageGaugeD5171 15211. Report11.1 State that the specimens were tested as directed in Test Method D5171. Describe the material or product sampled.11.1.1 Total number of specimens,11.1.2 Button ligne size,11.1.3 Height of fall and mass of plunger, if the standard con
28、ditions are not used.11.1.4 Number of specimens damaged due to (1) cracking, (2) chipping (3) breakage.12. Precision and Bias12.1 No information is presented about either the precision or bias of this test method since the test result is nonquantitative.12.2 BiasNo justifiable statement can be made
29、on the bias of Test Method D5171 for testing the impact resistance of buttonssince the true value cannot be established by an accepted referee method.FIG. 1 Impact-Resistance TesterD5171 15313. Keywords13.1 button; impact resistance; strengthASTM International takes no position respecting the validi
30、ty of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subjec
31、t to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarter
32、s. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard i
33、s copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or servicea
34、stm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ The last approved version of this historical standard is referenced on www.astm.org.D5171 154
