Composite for waterproof breathable film and preparation method of composite
A technology of waterproof breathable membrane and composite material, which is applied in the field of composite materials for waterproof breathable membrane and its preparation, which can solve the problems of pinholes and holes in the breathable membrane, reduce production cost, improve melt strength, and simple preparation process Effect
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Embodiment 1
[0024] (1) Take raw materials by components and proportioning ratio (parts by weight) in Table 1;
[0025] (2) Mix in a high mixer for 5 minutes, mix the above-mentioned raw materials evenly, extrude the mixed blend through a twin-screw extruder to granulate, and the temperature of each zone of the extruder is sequentially from the feeding section to the head temperature 150°C, 170°C, 175°C, 175°C, 175°C, 180°C, 180°C, 180°C, 180°C, 185°C, the length-to-diameter ratio of the extrusion screw is 40, and the rotation speed of the extrusion screw is 350 rpm.
Embodiment 2
[0027] (1) Take raw materials by components and proportioning ratio (parts by weight) in Table 1;
[0028] (2) Mix in a high mixer for 10 minutes, mix the above-mentioned raw materials evenly, extrude the mixed blend through a twin-screw extruder to granulate, and the temperature of each zone of the extruder is sequentially from the feeding section to the head temperature 170°C, 185°C, 185°C, 185°C, 185°C, 190°C, 195°C, 195°C, 195°C, 200°C, the aspect ratio of the extrusion screw is 36, and the rotation speed of the extrusion screw is 350 rpm.
Embodiment 3
[0030] (1) Take raw materials by components and proportioning ratio (parts by weight) in Table 1;
[0031] (2) Mix in a high mixer for 15 minutes, mix the above-mentioned raw materials evenly, extrude the mixed blend through a twin-screw extruder to granulate, and the temperature of each zone of the extruder is sequentially from the feeding section to the head temperature 150°C, 170°C, 175°C, 175°C, 175°C, 180°C, 180°C, 180°C, 180°C, 195°C, the length-to-diameter ratio of the extrusion screw is 40, and the rotation speed of the extrusion screw is 350 rpm.
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