Standard Test Method for
Apparent Viscosity of Hot Melt Adhesives and Coating
This standard is issued under the fixed designation D 3236; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1.1 This test method covers the determination of the apparent viscosity of hot melt adhesives and coating materials
compounded with additives and having apparent viscosities up
to 200 000 millipascal second (mPa·s) (Note 3) at temperatures
up to 175°C (347°F).
NOTE 1—Although precision has not been studied, this procedure may
be adaptable to viscosities higher than the present 200 000-mPa·s limit and
temperatures above 175°C (347°F). Equipment described in this test
method permits testing of materials having viscosities as high as 16 3 106
mPa·s and provides temperatures up to 260°C (500°F).
NOTE 2—For petroleum waxes and their blends having apparent viscosities below 15 mPa·s, Test Method D 445 is especially applicable.
NOTE 3—One pascal second (Pa·s) = 1000 centipoise (CP); one millipascal second = one centipoise.
1.2 The values stated in SI units are to be regarded as the
standard. The values in parentheses are for information only.
1.3 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.
2. Referenced Documents
2.1 ASTM Standards: 2
D 445 Test Method for Kinematic Viscosity of Transparent
and Opaque Liquids (the Calculation of Dynamic Viscosity)
3.1.1 apparent viscosity—the viscosity determined by this
test method and expressed in millipascal seconds. Its value
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