Process for continuous production of polyolefin material
First Claim
1. A process for continuously producing a high-strength and high-modulus polyolefin material, which comprises:
- feeding a polyolefin powder between a pair of upper and lower endless belts having inner and outer surfaces opposed to each other,conveying the polyolefin powder between the endless belts under compression to compression-mold the polyolefin powder at a temperature lower than the melting point of the polyolefin powder, the compression being effected, via the endless belts, by a pressing means comprising two opposing sets of a plurality of rollers, each set arranged at the outer surface of each endless belt so that each roller of one set faces a roller of the opposing set and each of which rollers is rotatably supported at the shaft ends by a frame, and thenrolling and stretching the resultant compression-molded polyolefin.
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Accused Products
Abstract
According to the present invention, a polyolefin sheet, film or fiber having a high strength and a high modulus can be continuously produced by:
feeding an ultra-high-molecular-weight polyolefin powder between a pair of upper and lower endless belts opposed to each other,
conveying the polyolefin powder between the endless belts under compression to compression-mold the polyolefin powder at a temperature lower than the melting point of the polyolefin powder, the compression being continuously and smoothly effected, via the endless belts, by a pressing means comprising two sets of rollers which are arranged at the back sides of the endless belts so that each one roller of the two roller sets faces each other and each of which rollers is rotatably supported at the shaft ends by a frame, and then
rolling and stretching the resultant compression-molded polyolefin in this order.
67 Citations
15 Claims
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1. A process for continuously producing a high-strength and high-modulus polyolefin material, which comprises:
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feeding a polyolefin powder between a pair of upper and lower endless belts having inner and outer surfaces opposed to each other, conveying the polyolefin powder between the endless belts under compression to compression-mold the polyolefin powder at a temperature lower than the melting point of the polyolefin powder, the compression being effected, via the endless belts, by a pressing means comprising two opposing sets of a plurality of rollers, each set arranged at the outer surface of each endless belt so that each roller of one set faces a roller of the opposing set and each of which rollers is rotatably supported at the shaft ends by a frame, and then rolling and stretching the resultant compression-molded polyolefin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification