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.

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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