ASTM-D955 2000

$40.63

D955-00 Standard Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics

Published By	Publication Date	Number of Pages
ASTM	2000	5

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Categories: 83.140.10 - Films and sheets, ASTM

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Description

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 conditions.

1.2 This test method covers initial shrinkage measurements. The method also accommodates shrinkage at 24 and 48 h, which may be critical for some materials.

1.3 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 gradients and process conditions. Differences in mold shrinkage may also be observed between the three specimen geometries described in this test method.

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

1.5 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 test method is technically identical to ISO 294-4 where Type D2 specimens are used except that pressure transducers are an option in this test method and required in ISO 294-4.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Method
2	Significance and Use Sample Preparation Apparatus FIG. 1 FIG. 2
3	Test Specimen Conditioning Procedure FIG. 3 FIG. 4
4	Calculation and Report Precision and Bias TABLE 1
5	Keywords TABLE 2 TABLE 3

Additional information

Standard Title	D955-00 Standard Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics
Published Code	ASTM
Publication Date	2000
Pages Count	5
ICS Codes	83.140.10 - Films and sheets

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ASTM-D955 2000

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