ASTM-D4242 2007(Redline)

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D4242-07 Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders (Redline)

Published By	Publication Date	Number of Pages
ASTM	2007	3

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Category: ASTM

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Description

Significance and Use

This test method is useful for selecting coating powders of similar characteristics of melt flow under minimal shear. It is not recommended as an absolute measurement, but rather as a comparative measurement of samples on the same panel measured at the same time.

1. Scope

1.1 This test method specifies a method for determining the flow characteristics of a fused thermosetting coating powder down a plane inclined at a set angle to the horizontal. The test gives an indication of the degree of melt flow that may occur during the curing of the coating powder. This characteristic contributes to the coherence of the coating, to its surface appearance and to the degree of coverage over sharp edges (see Test Method D 2967), however, it should not be used as the sole factor for judgment. The test acts as a useful method for checking for batch to batch variation in the behavior of a given coating powder. Correlation between the results from coating powders of differing composition is not to be expected. This method is unlikely to yield meaningful results with coating powders which have gel times of less than one minute at the test temperature (see Test Method D 4217). Oven drafts, angle of inclination and pellet variations significantly affect results making inter-lab reproducibility somewhat difficult to correlate.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are 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 to determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement D2967 Test Method for Corner Coverage of Powder Coatings D4217 Test Method for Gel Time of Thermosetting Coating Powder D5965 Test Methods for Specific Gravity of Coating Powders

Keywords

coating powder; pellet flow; pill flow ; plate flow; po

Additional information

Standard Title	D4242-07 Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders (Redline)
Published Code	ASTM
Publication Date	2007
Pages Count	3

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ASTM-D4242 2007(Redline)

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