ASTM D ). 2. SIGNIFICANCE. This method accelerates natural aging of . ASTM D SUMMARY OF CHANGES. No changes from the 14th edition. Designation: D – 06 Standard Practice for Accelerated Aging of Pressure- Sensitive Tapes1 This standard is issued under the?xed. A summary of ASTM standards relating to pressure sensitive tape is attached. D (), includes the year of the last revision () and the year of.
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A number in parentheses indicates the year of last reapproval. A superscript 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. It is applicable to tape in roll form when the user observes the precautions detailed within the procedure. The practice does not provide for a conclusion within itself, but is for use in conjunction with appearance or physical property tests to follow the accelerated exposure.
While this practice was developed using packaging type tapes, its use on other types of tape asttm similar construction is encouraged.
It is not intended for use on electrical grade tapes see Test Methods D 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. Summary of Practice 4. This accelerated exposure usually produces an exaggerated change in appearance which would be seen under natural conditions only in abnormal product.
The vessel must meet the following requirements: Current edition approved Oct. Originally approved in Last previous edition approved in as D — 89 Reagents for Humidity Vessel in Oven procedure 7. Unless otherwise indicated, it is intended that all reagents shall conform to the speci? Use a volume the units will be cubic centimetres of water not less than that obtained by multiplying times times the vessel air volume in cubic metres. This solution within the closed vessel both provides and controls the moisture content humidity within the vessel.
Include no more sample rolls than will displace one fourth of the air volume in the vessel. Use separators that allow free air space around and between the rolls and which are non-hygroscopic. This reduces salt deposition and crystalline build-up.
Immediately remove the sample rolls from the assembly. This may require 24 or 48 h for some materials.
ASTM D 压敏胶带的加速老化试验_百度文库
NOTE 1—The environment for this practice cannot occur unless the vessel used as the environment container is vented so that pressure differences between the inside and the outside of the vessel can be balanced. The environment in the vessel is dependent on careful observation of the requirements of loading in relationship to vessel volume and liquid surface area in accordance with Section 7.
Include no more sample rolls than will displace one fourth of the air volume in the chamber This is like the variability in any test method that we commonly term its precision. It is an effect due to the small differences that occur in performing any step of a process. For instance, when repeating this conditioning one might not set the temperature exactly the same or the atmospheric pressure might vary or the purity of the salt might differ from different vendors.
These small differences result in slightly different aging of the tape from time to time. This variation does not appear as something we can measure directly on its own.
It is superimposed on the variability inherent in performance of the subsequent physical property test for which this d611 was preparatory. We do not expect this superimposed added variability effect to be great. Since it is seen as a change in the apparent variability of the physical property test results, we can relate it to the expected precision asttm the test by making the following statement: An illustration of this can be made with the peel adhesion test.
ASTM D3611 – 06(2011)
This means that a measurement of precision for a physical property test on tape always has as one of its components the inherent variability between tape specimens. Aging reduces this inherent variability between specimens for some types of tape and some tests. Therefore this conditioning does not always cause an increase in dispersion. For example, a given type of tape a speci?
A different type of tape could yield data comparable to more or less than that time period. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
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