1、Designation: E 171 94 (Reapproved 2007)Standard Specification forStandard Atmospheres for Conditioning and TestingFlexible Barrier Materials1This standard is issued under the fixed designation E 171; the number immediately following the designation indicates the year oforiginal adoption or, in the c
2、ase of revision, the year of last 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 sp
3、ecification defines the standard temperature andhumidity for conditioning and testing of materials at nominallyambient conditions.1.2 There are many other temperature and humidity condi-tions which may be appropriately used to test end use condi-tions such as freezer, refrigerated or abusive storage
4、. Theseneed to be individually established.1.3 Temperature and humidity alone are not sufficient tocompletely define a storage condition. Many other factors maybe relevant (such as time, light and atmospheric pressure)which are not defined in this specification.1.4 Only those materials which fall in
5、to the general area offlexible packaging materials are included. Many other materi-als which were included in earlier versions of this specificationmay also need a definition.2. Referenced Documents2.1 TAPPI Standard:T 402 Standard Conditioning and Testing Atmospheres forPaper, Board, Pulp Handsheet
6、s, and Related Products23. Standard Atmospheres3.1 Condition and test materials containing paper as fol-lows:Temperature: 23 6 1C (73.4 6 1.8F)Humidity: 506 2%RH3.2 Condition and test plastic materials as follows:Temperature: 23 6 2C (73.4 6 3.6F)Humidity: 506 5%RH3.3 Conditioning and testing of oth
7、er materials is not withinthe scope of this specification.3.4 The instruments and techniques used to measure thesestandard conditions of temperature and humidity must bevalidated. The validation process is beyond the scope of thisspecification.3.5 Preconditioning may be important with some items,par
8、ticularly those containing paper. In these cases, precondi-tioning is recommended in accordance with TAPPI T 402 at 10to 35 % relative humidity and 22 to 40C.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standa
9、rd. 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 subject to revision at any time by the responsible technical committee and must be reviewe
10、d 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 Headquarters. Your comments will receive careful consideration at a meeting of theresponsible
11、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 is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh
12、ohocken, 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 serviceastm.org (e-mail); or through the ASTM website(www.astm.org).1This specification is
13、under the jurisdiction of ASTM Committee F02 onFlexible Barrier Packaging and is the direct responsibility of Subcommittee F02.50on Package Design and Development.Current edition approved April 1, 2007. Published May 2007. Originallyapproved in 1960. Last previous edition approved in 2002 as E 171 94 (2002).2Available from Technical Association of the Pulp and Paper Industry (TAPPI),15 Technology Parkway South, Norcross, GA 30092, http:/www.tappi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
