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Standard Test Method for Apparent Density of Rigid Cellular Plastics
The values given in parentheses are for information only. Spray equipment shall be adjusted to the best spray pattern and optimum performance. If the material does not have dd1622 skins, the term overall density is not applicable.
In these cases the pressure shall be reduced accordingly. There are no recognized standards on which to base an estimate of bias for this test method. However, freshly produced closed-cell materials are essentially air-void and will exhibit maximum buoyant effects of air. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the d16622 of infringement of such rights, are entirely their own responsibility.
The principles of If there are no relevant ASTM material speci? Hold the pressure of the dial foot to 2. Note 1 — This test method is equivalent to ISO A lesser number may be made when the following conditions apply: Revised Material 4 repeatability interval, Ir.
Historical Version s – view previous versions of standard. After a minimum of 5 min, spray apply a second layer of 3. For each material, all the samples were prepared at one source, but the individual specimens were prepared at the laboratories that tested them. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM materials speci? If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Atsm of this test method should apply the principles outlined in Practice E to generate data speci? Spray apply a minimum 1. For calculation of the apparent overall density, cut a specimen that includes the forming skin. A number in parentheses indicates the year of last reapproval. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The specimens shall be taken from locations distributed throughout the sample. Revised Average value for Material 3 in Table 2.
If the material does not have forming skins, the term overall density is not applicable. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Precision and Bias4 Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
VR is the between-laboratories coefficient of variation of the average.
ASTM D – 08 Standard Test Method for Apparent Density of Rigid Cellular Plastics
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. When a sliding caliper gage is used, the proper setting shall be that point at which the measuring faces aatm the gage contact the surfaces of the specimen without compressing them.
Density can be evaluated as the apparent overall density includes forming skins or by apparent core density forming skins removed. Highly open-celled materials are essentially air-? 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.
Combining values from the two systems may result in non-conformance with the standard. Measurements per Dimension asm 2 The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
Current edition approved April 1, Last previous edition approved in as D – Thus, the value of Wa is zero in the above calculation when the sample is at equilibrium with the air. For calculation of core density, remove the bottom layer and the top skin. NOTE 3—The air buoyancy effect will vary with time and depends on the open-cell content of the foam. Each laboratory obtained one test result for each material.
Work Item s – proposed revisions of this standard.
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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Revised Average value for Material 3 in Table 1.
This standard f1622 subject to revision at any time by the responsible technical wstm and must be reviewed every? Measure all dimensions to a precision of ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.