Standard Test Method for Spiral Flow of Low-Pressure Thermosetting Molding Compounds

Importancia y uso:

4.1 The spiral flow of a thermosetting molding compound is a measure of the combined characteristics of fusion under pressure, melt viscosity, and gelation rate under specific conditions.

4.2 This test method is useful as a quality control test and as an acceptance criterion.

4.3 This test method, by itself, is not a valid means for comparing the moldability of similar or different molding compounds because it cannot duplicate actual conditions prevalent in different types of production molds.

4.4 This test method is presently intended for use at a transfer pressure of 6.9 MPa (1000 psi) and a mold temperature of 423 ± 3 K (150 ± 3°C (302 ± 5°F)).

Subcomité:

D20.30

Referida por:

D5592-94R18, D1896_D1896M-10R17

Volúmen:

08.01

Número ICS:

83.140.99 (Other rubber and plastic products)

Palabras clave:

spiral flow; thermosets;