ASTM D3078-2002 Standard Test Method for Determination of Leaks in Flexible Packaging by Bubble Emission《起泡法测定软包装泄漏的标准试验方法》.pdf
《ASTM D3078-2002 Standard Test Method for Determination of Leaks in Flexible Packaging by Bubble Emission《起泡法测定软包装泄漏的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D3078-2002 Standard Test Method for Determination of Leaks in Flexible Packaging by Bubble Emission《起泡法测定软包装泄漏的标准试验方法》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 3078 02Standard Test Method forDetermination of Leaks in Flexible Packaging by BubbleEmission1This standard is issued under the fixed designation D 3078; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the determinat
3、ion of gross leaksin flexible packaging containing a headspace gas. Test sensi-tivity is limited to 1 3 105atm cm3/s (1 3 106Pa m3/s) oreven less sensitive as indicated in a recent interlaboratory test(reported in Section 12).1.2 Small leaks may not be detected by this procedure.Viscoelastic effects
4、 on the products, or entrapped air, becomesignificant and prevent passage through small openings. Posi-tive pressure inside the pouch after the vacuum is drawn mayforce the product to plug small leaks. The size of the leak thatcan be detected is dependent upon the products contained, thenature of th
5、e packaging material, and the test parametersselected.1.3 This standard does not purport to address all of thesafety concerns, if 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
6、of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E 425 Definitions of Terms Related to Leak Testing3E 515 Test Method for Leaks Using Bubble Emission Tech-niquesF98 Practices for Determining Hermeticity of ElectronDevices by a Bubble Test33. Terminology3.1 Definition
7、:3.1.1 leakany opening in a flexible package that, contraryto intention, either allows the contents to escape or substancesto enter.4. Apparatus4.1 Vacuum ChamberAny transparent container capableof withstanding approximately one atmosphere pressure differ-ential, fitted with a vacuum-tight cover. A
8、vacuum gage, aninlet tube from a source of vacuum, and an outlet tube to theatmosphere shall be connected to the chamber cover. The inletand outlet tubes shall be equipped with hand valves. Attachedto the underside of the cover shall be a transparent plate thatwill closely approximate the inside dim
9、ensions of the containerand be such a distance from the top of the container that whenit is two-thirds filled with fluid, the attached plate will bepositioned 1 in. (25 mm) under the fluid.5. Materials5.1 Immersion FluidsUse an immersion fluid which doesnot degrade the package being tested. Fluids w
10、ith a low surfacetension are generally more sensitive. Examples include water,water treated with a wetting agent, denatured alcohol, andmineral oil. Other possible fluids are listed in Test MethodE 515 and Practices F98.6. Sampling6.1 The number of specimens used in the test sample maybe varied acco
11、rding to the nature of the product, its cost, itssize, and whether the specimens are taken from a productionline in a normal packaging operation, or are few in number, orare to be used only for purposes of comparative evaluation ofprocedures or materials.7. Test Specimen7.1 Flexible Package, with or
12、 without its intended contents.1This test method is under the jurisdiction ofASTM Committee F02 on FlexibleBarrier Materials and is the direct responsibility of Subcommittee F02.40 onPackage Integrity.Current edition approved Dec. 10, 2002. Published February 2003. Originallypublished in 1972. Last
13、previous edition approved in 1984 as D 3078 84.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.1Co
14、pyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8. Conditioning8.1 The test sample and test fluid shall be at equilibriumwith normal room temperature.9. Procedure9.1 Submerge the specimen in fluid contained in the vesselwithin the vacuu
15、m chamber. The uppermost surface of thespecimen shall be covered by not less than 1 in. (25 mm) offluid.NOTE 1Two or more small packages may be tested at the same time,provided that they are placed in such a manner that all parts of everypackage under test can be observed for leakage during the test
16、.9.2 Set the cover on the vacuum chamber, close the outletvalve, and turn on the vacuum so that the gage rises slowly(approximately 1 in. Hg/s) to a selected vacuum level. Thevacuum level chosen should be as large as possible in order toensure optimal sensitivity of the test. Limiting factors willin
17、clude package fragility, the degree of package expansion, andthe test-fluid vapor pressure.9.3 During the rise in vacuum, observe the submergedspecimen for leakage in the form of a steady progression ofbubbles from the flexible container. Isolated bubbles caused byentrapped air are not considered as
18、 leaks. Also note theapproximate increase in package volume. The pressure differ-ential of the test is inversely related to the volume increase ofthe sample; therefore, large volume increases significantlydetract from the severity of the test. Flexible packaging withlittle or no headspace cannot be
19、reliably evaluated with this testmethod.9.4 Hold the vacuum for a specified time period; 30 s isrecommended, but this may be set at the testers discretion.9.5 Release the vacuum, remove the lid, and examine thespecimen for the presence of test fluid inside the specimen.10. Interpretation of Results1
- 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:
- ASTMD30782002STANDARDTESTMETHODFORDETERMINATIONOFLEAKSINFLEXIBLEPACKAGINGBYBUBBLEEMISSION 起泡 测定 软包装 泄漏

链接地址:http://www.mydoc123.com/p-514049.html