METHOD TO PREPARE ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE PARTICLES AND THEIR APPLICATION
Disclosed are an ultra-high molecular weight polyethylene resin for fiber and a preparation method thereof. The initial crystallinity of the resin is 60.5 to 90%, the volume average particle size is between 100 and 350 µm, the particle-size distribution is 1.0-2.1, the molecular weight is 2-7 millio...
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Sprache: | eng ; fre ; ger |
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Zusammenfassung: | Disclosed are an ultra-high molecular weight polyethylene resin for fiber and a preparation method thereof. The initial crystallinity of the resin is 60.5 to 90%, the volume average particle size is between 100 and 350 µm, the particle-size distribution is 1.0-2.1, the molecular weight is 2-7 million, the tensile breaking stress is 30 to 60 MPa, the bulk density of the resin is 0.10 to 0.50 g/cm 3 , the infltration time in the solvent decalin is 0.5 to 11 min, the decalin absorption amount of the resin is 2 to 50g of decalin per 100 g of ultra-high molecular weight polyethylene resin, and the white oil absorption amount is 5 to 60 g of decalin per 100 g of ultra-high molecular weight polyethylene resin. According to the preparation method of the resin, ethylene homopolymerization is performed by use of a slurry polymerization process in the presence of a main catalyst and a co-catalyst. The resin is characterized by being excellent in fiber spinning performance, rapid in swelling and dissolution, and stable in spinning and thermal stretching processes. The prepared fibers have characteristics of high modulus and high strength, wherein the modulus ¥ 25 cN/dtex, and the strength ¥ 800 cN/dtex. |
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