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ASTM D955

Standard Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics

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Organization: ASTM
Publication Date: 1 November 2008
Status: active
Page Count: 8
ICS Code (Films and sheets): 83.140.10
scope:

This test method is intended to measure shrinkage from mold cavity to molded dimensions of thermoplastics when molded by compression or injection processes with specified process conditions. 

This test method covers shrinkage measurements at 24 and 48 hours. 

This method will give comparable data based on standard specimens and can not predict absolute values in actual molded parts with varying flow paths, wall thicknesses, pressure and temperature gradients and process conditions. Differences in mold shrinkage may also be observed among the three specimen geometries described in this test method. 

The values stated in SI units are to be regarded as the standard. The values given in parentheses are given for information only. 

This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

NOTE 1-This standard and ISO 294-3 are equivalent in the design of specimen D2. This test method is equivalent to ISO 294-4 where Type D2 specimens and the procedure in Appendix X2 are used.

Document History

ASTM D955
November 1, 2008
Standard Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics
This test method is intended to measure shrinkage from mold cavity to molded dimensions of thermoplastics when molded by compression or injection processes with specified process conditions.  This...
November 1, 2008
Standard Test Method for Measuring Shrinkage from Mold Dimensions of Thermoplastics
This test method is intended to measure shrinkage from mold cavity to molded dimensions of thermoplastics when molded by compression or injection processes with specified process conditions. This...
November 10, 2000
Standard Test Method for Measuring Shrinkage from Mold Dimensions of Thermoplastics
1. Scope * 1.1 This test method is intended to measure shrinkage from mold cavity to molded dimensions of thermoplastics when molded by compression or injection processes with specified process...
November 24, 1989
Standard Test Method for Measuring Shrinkage from Mold Dimensions of Molded Plastics
1. Scope 1.1 This test method is intended to measure batch-to-batch uniformity in initial shrinkage from mold to molded dimensions of either thermoplastic or thermosetting materials when molded by...
June 24, 1988
STANDARD TEST METHOD OF MEASURING SHRINKAGE FROM MOLD DIMENSIONS OF MOLDED PLASTICS
A description is not available for this item.
February 9, 1973
STANDARD METHOD OF MEASURING SHRINKAGE FROM MOLD DIMENSIONS OF MOLDED PLASTICS (R-1979)
A description is not available for this item.

References

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