Method for preparing ultrahigh molecular weight polyethylene thick-wall tube
An ultra-high molecular weight, polyethylene technology, applied in the direction of pipes/pipe joints/fittings, pipes, rigid pipes, etc., can solve the problems of heavy weight, easy corrosion, easy adhesion, etc., to achieve wide temperature suitability, low wear index, and labor reduction the effect of strength
Inactive Publication Date: 2010-06-09
周恒勇
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Problems solved by technology
[0002] At present, most of the pipes made of metal are used in the transportation process of chemical industry, petroleum, natural gas and other industries at home and abroad. Due to the physical properties of the metal itself, there are generally disadvantages such as easy corrosion, heavy weight, easy wear, and easy adhesion. The emergence of new thick-walled pipes that can solve these problems
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[0010] Taking the production of pipes with an outer diameter of 320mm and an inner diameter of 90mm as an example, the ultra-high molecular weight polyethylene and special additive powder are mixed by a mixer and then evenly sent to a single-screw extruder with a helix angle of 42°-45° to directly extrude the powder quickly Press into a material with a certain density, melt and plasticize it, and directly extrude the pipe, then use a special mold with an outer diameter of 330mm and an inner diameter of 85mm to form a pipe through external force traction and cooling by the cooling system, and cut it with an electric saw according to the length requirements.
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The invention discloses a method for preparing an ultrahigh molecular weight polyethylene thick-wall tube, which comprises the following steps: mixing ultrahigh molecular weight polyethylene and special assistant powder through a stirrer and then evenly feeding the mixture to a single-screw extruder of which the helix angle is 42 to 45 degrees, directly and quickly pressing the powder to a material with certain thickness, melting and plasticizing the material under the melt pressure of less than 10MPa and corresponding temperature parameters, directly extruding the material output of a tube, then forming a tube shape through special dies in turn, forming a tube material through a cooling system, and finally cutting the tube material with fixed length by a cutter.
Description
technical field [0001] The invention relates to a method for preparing ultra-high molecular weight polyethylene thick-walled pipes, belonging to the field of new engineering plastics. Background technique [0002] At present, most of the pipes made of metal are used in the transportation process of chemical industry, petroleum, natural gas and other industries at home and abroad. Due to the physical properties of the metal itself, there are generally disadvantages such as easy corrosion, heavy weight, easy wear, and easy adhesion. The emergence of new thick-walled pipes that can solve these problems. Contents of the invention [0003] The purpose of the present invention is to overcome the shortage of metal pipes and provide a new ultra-high molecular weight polyethylene thick-walled pipe with low cost, corrosion resistance and high wear resistance. [0004] The present invention is realized in this way: the ultra-high molecular weight polyethylene and special additive po...
Claims
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IPC IPC(8): F16L9/12
Inventor 周恒勇
Owner 周恒勇
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