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- home > Supply > Ultra-high molecular weight polyethylene sheet emerging is the most complete specifications
Information Name: | Ultra-high molecular weight polyethylene sheet emerging is the most complete specifications |
Published: | 2012-04-18 |
Validity: | 365 |
Specifications: | Order |
Quantity: | 32165461.00 |
Price Description: | |
Detailed Product Description: | Ultrahigh molecular weight polyethylene sheet, complete specifications! UHMWPE English name of the ultra-high molecular weight polyethylene sheet ultra-high molecular weight polyethylene (hereinafter referred to UHMWPE), is more than one million of the molecular weight polyethylene. The ultrahigh molecular weight polyethylene has a molecular chain length is 10 to 20 times that of the high-density polyethylene. Longer molecular chains (higher molecular weight) to give of UHMWPE main advantage of toughness, wear resistance and resistance to stress cracking resistance. Since it is a kind of polyethylene, UHMWPE has lubricity, chemical resistance and excellent electrical properties of the generic HDPE. Long molecular chains to make the materials difficult to machine in a common molding and extrusion equipment. Heated to above the melting point of UHMW become transparent, but does not flow. Chemistry and performance UHMWPE is legally produced with Ziegler polyethylene. Processing requirements of particularly high purity ethylene monomer impurity control in a few parts per million. The product is a white powder, similar particle size and salt. The polymer solution viscosity method to detect the basis of intrinsic viscosity (IV) and molecular weight (MW). UHMWPE according to ASTM definition of the weight average molecular weight (MW) greater than 3 million. Existing UHMWPE grades of MW between 300 to 600 million. Generally in accordance with Category IV, IV 20dl. / G is approximately equal to MW to 3 million. IV of 30 MW to 600 Million. Some grades contain additives for a particular end-use applications. Typically, UHMW material without additives, and can no stabilizer sintering and forging. Processing conditions, including the hour and 0.5 tons / square inch or higher pressure conditions, UHM3V can be solidified into a block, plate, or a simple extrusion pressure in the 392F temperature. Under these conditions, the occurrence of some oxidative cross-linking. If most of the material due to the cross-linked to become insoluble, of UHMWPE IV value can not be accurately measured. The appropriate cross-linked with peroxide for the enhanced wear resistance. UV resistance or to extend the heat resistance add UV stabilizer or antioxidant. UHMWPE has excellent abrasion resistance, good low temperature impact resistance, self-lubricating, non-toxic, water resistance, chemical resistance, heat resistance and superior to the general PE, the drawback is that the heat resistance (heat distortion temperature) Low processing, the outer surface hardness, stiffness, creep resistance than most engineering plastics, coefficient of expansion is too large. The UHMWPE poor mobility, high viscosity in the molten state, were the high viscosity of the rubber-like elastomer, early only with the pressing and sintering methods available extrusion molding, injection molding and blow molding processing methods. Some of the uses of the UHMWPE is based on the absorption of noise and shock absorption. If you need UHMW available dye coloring pigment slightly worse than some. |
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Copyright © GuangDong ICP No. 10089450, Emerging Chemical Co., Ltd. Shandong All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
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You are the 33915 visitor
Copyright © GuangDong ICP No. 10089450, Emerging Chemical Co., Ltd. Shandong All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility