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ASTM D1238 - 04c
Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
| Fecha edición: |
2004-12-01
Anulada
|
|---|---|
| Fecha cancelación: | 2004-12-01 |
| Idiomas disponibles: | Inglés |
| Resumen: | |
| Keywords: | melt flow rate; melt index; volume flow rate |
| Scope: | 1.1 This test method covers measurement of the rate of extrusion of molten resins through a die of a specified length and diameter under prescribed conditions of temperature, load, and piston position in the barrel as the timed measurement is being made. 1.2 Procedure A is a manual cutoff operation based on time used for materials having flow rates that fall generally between 0.15 and 50 g/10 min. Procedure B is an automatically timed flow rate measurement used for materials having flows from 0.50 to 900 g/10 min. By both procedures, the piston travel is generally the same during the timed measurement; the piston foot is about 46 and 20.6 mm above the die. Comparable flow rates have been obtained by these procedures in interlaboratory round-robin measurements of several materials described in . Provision is made for calculation of melt volume-flow rate as well as melt mass-flow rate. Note 1Round-robin testing indicates this test method may be suitable at flow rates up to 1500 g/10 min if the timing clock resolves the elapsed time to the nearest 0.01 s. Note 2This test method and ISO 1133-1991 are technically equivalent. This standard does not purport to address 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. |
| ICS: | 83.080.20 - Materiales termoplásticos |
| CTN: | D20.30 - D20.30 |
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Otras Relaciones |
Es referenciada por D4976-12AR20 Es referenciada por F3508-21A Es referenciada por F2150-19 Es referenciada por F3123-22 Es referenciada por F0561-19 Es referenciada por D7238-20 Es referenciada por F2881_F2881M-21E01 Es referenciada por D6394-21A Es referenciada por D3159-22 Es referenciada por D5577-19 Es referenciada por F0755-19 Es referenciada por D2116-16R21 Es referenciada por D3935-21 Es referenciada por F0997-18 Es referenciada por D5721-22 Es referenciada por F3034-21 Es referenciada por D3364-99R19 Es referenciada por D6339-11R19 Es referenciada por D3222-21 Es referenciada por D4565-20 |










