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B. Samujło, R. Sikora

The course of Mg(OH)2 modified polyethylene extrusion process

RAPID COMMUNICATION

Polimery 2000, No 1, 50


DOI: dx.doi.org/10.14314/polimery.2000.050


Summary

Medium-density PE (MFI, 0.712 g/10 min) was modified with Mg(OH)2, FR-20 grade, particle size 2.5 μm. Antiblocking and lubricat­ing agents, 020–04, 020–15 and Lifoslip 220 PE were added as PE concetrates. Experimental extrusions in a Brabender Plastic-Corder (PLV 151 type), were carried out at screw speed 0.75 s-1, three-heating-zones tem­peratures 160°C, 170°C and 170°C, extruder head temperature 170°C, and extrusion velocity 1.72 mm/s. The pressure in the extruder head, the tur­ning moment measured on the extruder screw, and the flow rate rose as the Mg(OH)2 content was increased (Figs. 1–3). With the Lifoslip agent, the pressure and the turning moment attained the lowest values. At high Mg(OH)2 contents, 57.5 and 60%, the pressure and the turning moment had values close to those attained with other auxiliary agents.
Keywords: extrusion of MDPE, halogen-free flame retardants, magnesium hydroxide as flame retarder
B. Samujło, R. Sikora (92.5 KB)
The course of Mg(OH)2 modified polyethylene extrusion process - RAPID COMMUNICATION