Standard Test Method for Apparent Viscosity of Hot Melt Adhesives and Coating Materials

Importancia y uso:

5.1 This test method distinguishes between hot melts having different apparent viscosities. It is believed that apparent viscosity determined by this procedure is related to flow performance in application machinery operating under conditions of low shear rate. Apparent viscosity as determined by this test method may not correlate well with end-use applications where high shear rates are encountered.

5.2 Materials of the type described in this procedure may be quite non-Newtonian and as such, the apparent viscosity will be a function of shear rate under the conditions of test. Although the viscometer described in this test method generally operates under conditions of relatively low shear rate, differences in shear effect can exist depending upon the spindle and rotational speed conditions selected for the test program. Maximum correlation between laboratories, therefore, depends upon testing under conditions of equivalent shear.

Subcomité:

D02.10

Referida por:

D4730-13R20

Volúmen:

05.05

Número ICS:

25.220.60 (Organic coatings), 83.180 (Adhesives)

Palabras clave:

adhesives; apparent viscosity; coating materials; hot melt adhesives; rotational viscometry; viscosity;