ASTM D4332 PDF

ASTM D Standard Practice for Conditioning Containers, Packages, or Packaging Components for Testing Many materials from which containers and packages are made, especially cellulosic materials, undergo changes in physical properties as the temperature and the relative humidity RH to which they are exposed are varied. Therefore, the package should be placed and kept in a specified atmosphere for a length of time such that subsequent measurements of physical properties will be meaningful and reproducible. The conditions described in this practice are either historically accepted standard conditions or special laboratory conditions chosen to represent particular phases of the distribution environment. These special conditions do not necessarily duplicate actual field conditions, but tend to simulate them and have effects on packages and materials which may be related to their field performance. Scope 1. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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A number in parentheses indicates the year of last reapproval. This standard is commonly usedfor conditioning when conducting transit simulation tests. 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. Referenced Documents2. Significance and Use4. Therefore, thepackage should be placed and kept in a specified atmospherefor a length of time such that subsequent measurements ofphysical properties will be meaningful and reproducible.

These special conditions do not necessar-ily duplicate actual field conditions, but tend to simulate themand have effects on packages and materials which may berelated to their field performance. Atmospheric Conditions5. NOTE 1—Average values must fall within these limits. NOTE 2—In the absence of a specific requirement for a particularatmospheric condition, use the conditioning atmosphere given in 5. Current edition approved Nov. Published January Originallyapproved in Last previous edition approved in as D — United States See Test Method Efor a detailed description of methods.

The temperature andrelative humidity indicated at the control point, may not berepresentative of conditions elsewhere in the conditioned spacedue to local effects or deficiency in air circulation.

Tolerancesat the controller usually must be smaller than those at thespecimen. Apsychrometer may be used either for direct measurement ofrelative humidity or for checking the hygrometer see TestMethod E The dry-bulb thermometer of thepsychrometer may be used either for direct measurement or forchecking the temperature-indicating device.

If no time period is specified, a period of at least72 h, or that time required to reach equilibrium which may beshorter or longer in duration than 72 h , is recommended. Thecontainer, package, or packaging component shall be supportedin a manner such that all surfaces have free access to theconditioning atmosphere. Heavier packages may be placed ona pallet or other device that should allow for as much exposureof the bottom surface to the conditioning atmosphere as ispossible, so long as the device does not cause a permanentchange in the box or affect the final test result.

When this is not possible, the test shall be performed as quicklyas possible after the specimen is removed from the condition-ing atmosphere. Here too, the package shall be tested as quickly aspossible after removal from the conditioning atmosphere. Precision and Bias9. 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 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 Headquarters. 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.

CONDRICTIOS O PECES CARTILAGINOSOS PDF

ASTM D4332

A number in parentheses indicates the year of last reapproval. This standard is commonly usedfor conditioning when conducting transit simulation tests. 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. Referenced Documents2.

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