Ultra-high molecular weight polyethylene/aluminum oxide compound bulletproof plate
An ultra-high molecular weight, polyethylene board technology, applied in the direction of layered products, the structure of armored boards, chemical instruments and methods, etc., can solve problems such as inability to meet high modulus and high strength
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Embodiment 1
[0072] Preparation of ultra-high molecular weight polyethylene fibers: preheat 230kg of No. 7 solvent oil to 112°C, then put 40,000 kg of ultra-high molecular weight polyethylene and No. 7 solvent oil in the swelling kettle 101 and stir for initial swelling. The initial swelling time is 20 minutes . After the initial swelling, add 690 kg of No. 7 solvent oil at a temperature of 98°C to the swelling kettle for re-swelling to obtain a spinning solution. The re-swelling time is 30 minutes, and the stirring speed remains unchanged. The ambient temperature of the kettle dropped to 98°C.
[0073] After re-swelling, a uniform spinning solution is obtained, and the spinning solution is sent into the storage tank 102 to cool to 25° C. and then sent into the twin-screw extruder 103 for extrusion and dissolution. Wherein, the inlet temperature of the twin-screw extruder is 100° C., the intermediate temperature is 185° C., and the outlet temperature is 165° C., the residence time in the ...
Embodiment 2
[0080] After preheating 230kg of No. 7 solvent oil to 112°C, put 40000kg of ultra-high molecular weight polyethylene and No. 7 solvent oil in the swelling kettle 101 and stir for initial swelling. The initial swelling time is 20 minutes. After the initial swelling, add 690 kg of No. 7 solvent oil at a temperature of 98°C to the swelling kettle for re-swelling to obtain a spinning solution. The re-swelling time is 30 minutes, and the stirring speed remains unchanged. The ambient temperature of the kettle dropped to 98°C.
[0081] After re-swelling, a uniform spinning solution is obtained, and the spinning solution is sent into the storage tank 102 to cool to 25° C. and then sent into the twin-screw extruder 103 for extrusion and dissolution. Wherein, the inlet temperature of the twin-screw extruder is 100° C., the intermediate temperature is 185° C., and the outlet temperature is 165° C., the residence time in the twin-screw extruder is 5 minutes, and the twin-screw rotation sp...
Embodiment 3
[0087] The ultrahigh molecular weight polyethylene fibers prepared in Example 1 were used, which were spread on a low density polyethylene film coated with a polystyrene triblock copolymer. Pass the two polymer films bonded with fibers through two rotating press rolls under the action of guide wheels. The temperature of the press rolls is 60° C. and the pressure is 8 MPa to obtain a non-weft fabric with a width of 1.6 m. Owing to what used is the fiber filament of 600D, so the area density of described non-weft cloth is 160g / cm 2 .
[0088] Take 40 layers of the above-mentioned double-layer non-woven fabrics and stack them in the mold, apply a pressure of 8 MPa at 85°C for pre-pressing, make the air between the stacks overflow, keep the pressure for 25 minutes, then raise the temperature to 120°C, press Rise to 30MPa, keep the temperature and pressure for 25 minutes to obtain a molded piece, and finally cool the molded piece to room temperature with cooling water, and cut it ...
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