ASTM D1922-2015 Standard Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method《采用摆锤法测定塑料薄膜与薄板抗撕裂蔓延的标准试验方法》.pdf
《ASTM D1922-2015 Standard Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method《采用摆锤法测定塑料薄膜与薄板抗撕裂蔓延的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D1922-2015 Standard Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method《采用摆锤法测定塑料薄膜与薄板抗撕裂蔓延的标准试验方法》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D1922 09D1922 15Standard Test Method forPropagation Tear Resistance of Plastic Film and ThinSheeting by Pendulum Method1This standard is issued under the fixed designation D1922; the number immediately following the designation indicates the year oforiginal adoption or, in the case of r
2、evision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript 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*1.1 This test
3、method2 covers the determination of the average force to propagate tearing through a specified length of plasticfilm or nonrigid sheeting after the tear has been started, using an Elmendorf-type tearing tester. Two specimens are cited, arectangular type, and one with a constant radius testing length
4、. The latter shall be the preferred or referee specimen.1.2 Because of (1) difficulties in selecting uniformly identical specimens, (2) the varying degree of orientation in some plasticfilms, and (3) the difficulty found in testing highly extensible or highly oriented materials, or both, the reprodu
5、cibility of the testresults may be variable and, in some cases, not good or misleading. Provisions are made in the test method to address obliquedirectional tearing which may be found with some materials.1.3 The values stated in SI units are to be regarded as standard. The values given in parenthese
6、s are for information only.1.4 This standard does not purport to address all 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 pri
7、or to use. Specific precautionary statements are given in 13.1.NOTE 1Film has been arbitrarily defined as sheeting having nominal thickness not greater than 0.25 mm (0.010 in.).NOTE 2This standard is equivalent to ISO 6383-2.2. Referenced Documents2.1 ASTM Standards:3D618 Practice for Conditioning P
8、lastics for TestingD689 Test Method for Internal Tearing Resistance of Paper (Withdrawn 2009)4D1004 Test Method for Tear Resistance (Graves Tear) of Plastic Film and SheetingD4000 Classification System for Specifying Plastic MaterialsD5947 Test Methods for Physical Dimensions of Solid Plastics Speci
9、mensD6988 Guide for Determination of Thickness of Plastic Film Test SpecimensE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method2.2 ISO Standard:ISO 6383-2 PlasticsFilm and SheetingDetermination of Tear ResistancePart 2 Elmendorf Method51 This test metho
10、d is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.19 on Film, Sheeting, and MoldedProducts.Current edition approved May 1, 2009May 1, 2015. Published June 2009June 2015. Originally approved in 1961. Last previous edition approved in 20
11、082009 asD1922 - 08.D1922 - 09. DOI: 10.1520/D1922-09.10.1520/D1922-15.2 This test method has been adapted from TAPPI Standard Method T 414M-49, Internal Tearing Resistance of Paper. In testing certain plastic films, problems ofreproducibility and interpretation of results are encountered which requ
12、ire special treatment to make the test method of most value. This test method is revised here specificallyfor use with plastic film and thin sheeting. For more complete explanation of certain aspects of the equipment, its calibration and adjustment, refer to TAPPI Standard MethodT 414M-49.The follow
13、ing additional references may be of interest in connection with this test method:Painter, E. V., Chu, C. C., and Morgan, H. M., “Testing Textiles on the Elmendorf Tear Tester,” Textile Research Journal, Vol XX, No. 6, June 1950, pp. 410417.Elmendorf, A., “Strength Test for Paper,” Paper, Vol 26, Apr
14、il 21, 1920, p. 302.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. ForAnnual Book ofASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.4 The last approved version of this histori
15、cal standard is referenced on www.astm.org.5 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.10036, http:/www.ansi.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what c
16、hanges 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 of
17、ficial document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Summary of Test Method3.1 The force in grams required to propagate tearing across a film or sheeting s
18、pecimen is measured using a precisely calibratedpendulum device. Acting by gravity, the pendulum swings through an arc, tearing the specimen from a precut slit. The specimenis held on one side by the pendulum and on the other side by a stationary member. The loss in energy by the pendulum is indicat
19、edby a pointer. The scale indication is a function of the force required to tear the specimen.4. Significance and Use4.1 This test method is of value in ranking relative tearing resistance of various plastic films and thin sheeting of comparablethickness. Experience has shown the test to have its be
20、st reliability on relatively less extensible films and sheeting. Variableelongation and oblique tearing effects on the more extensible films preclude its use as a precise production-control tool for thesetypes of plastics. This test method should be used for specification acceptance testing only aft
21、er it has been demonstrated that thedata for the particular material are acceptably reproducible. This test method should be used for service evaluation only after itsusefulness for the particular application has been demonstrated with a number of different films.4.2 This test method has been widely
22、 used as one index of the tearing resistance of plastic film and thin sheeting used inpackaging applications. While it mayis not always be possible to correlate film tearing data with its other mechanical or toughnessproperties, the apparatus of this test method provides a controlled means for teari
23、ng specimens at straining rates approximatingsome of those found in actual packaging service.4.3 Due to orientation during their manufacture, plastic films and sheeting frequently show marked anisotropy in their resistanceto tearing. This is further complicated by the fact that some films elongate g
24、reatly during tearing, even at the relatively rapid ratesof loading encountered in this test method. The degree of this elongation is dependent in turn on film orientation and the inherentmechanical properties of the polymer from which it is made.These factors make tear resistance of some films repr
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD19222015STANDARDTESTMETHODFORPROPAGATIONTEARRESISTANCEOFPLASTICFILMANDTHINSHEETINGBYPENDULUMMETHOD

链接地址:http://www.mydoc123.com/p-510692.html