Preparation method of modified ultrahigh molecular weight polyethylene powder direct extruded tubing
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An ultra-high molecular weight, polyethylene powder technology, used in tubular articles, applications, household appliances, etc., can solve problems such as the decline of mechanical properties of pipes, improve mechanical properties, simplify technological processes, and reduce equipment and floor space. Effect
Inactive Publication Date: 2006-07-26
江苏星鑫工程管道有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to quickly compress the material into a material with a certain density after it enters the pipe extruder, and at the same time solve the defect that the mechanical properties of the pipe will decrease after being granulated and heated for many times, and provide an ultra-high Preparation method of molecular weight polyethylene powder directly extruding pipe
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Embodiment 1
[0010] Mix powdered ultra-high molecular weight polyethylene: 75%, liquid crystal polymer: 23.5%, particle size 30-60 mesh, antioxidant: 1.0%, additive: 0.5%, and dry at 100-120°C for 3-6 hours, into the extruder barrel, through the extruder with a screw helix angle of 42°~45°, the powder is quickly compressed by a screw with a large helix angle to form a material with a certain density, feeding section: 100~260°C, compression section: 240~280℃, homogenization section: 250~290℃, outlet: 220~260℃, melt pressure<10Mpa; the amount of material delivered to the head mold is sufficient, and the extruded pipe will not be degraded because the material is not reheated Reaction, the mechanical properties of the pipe are good, and then go through conventional processes such as cooling and shaping, box printing machine, tractor, cutting machine, etc., until it is put into storage.
Embodiment 2
[0012] The production process is the same as in Example 1, wherein the ratio of raw materials is: powdery ultra-high molecular weight polyethylene: 82.2%, liquid crystal polymer: 15%, particle size is 30 mesh to 60 mesh, antioxidant: 2.5%, additive: 0.3%
Embodiment 3
[0014]
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Abstract
The invention relates pipes manufacturing method, specially one-step method manufacturing pipe technique. The method comprises the following steps: mixing the LCP, UHMW-PE and special adjuvant, sending them into single screw extractor with 42-45Deg helix angle, compressing the powdery material, melting, plastifying, direct squeezing pipes, using die to form cast, cooling with water chamber, drawing with draw machine, cutting with cutting machine, and realizing the production of UHMW-PE. Due to cancel the granulation procedure ad directly squeeze pipes, the mechanics property of UHMW-PE in improved, the technology is simplified and the space is saved.
Description
technical field [0001] The invention belongs to a method for making pipes, in particular to a method for directly extruding pipes based on liquid crystal modified ultra-high molecular weight polyethylene powder, that is, a "one-step pipe making process". Background technique [0002] Ultra-high molecular weight polyethylene (UHMW-PE) pipes have small friction coefficient, low wear, chemical resistance, impact resistance, pressure resistance, frost resistance, heat preservation, self-lubricating stagnation, scaling resistance, and stress resistance Cracking, hygienic and other excellent characteristics, mainly used for solid particles, powder transportation, slurry transportation, fluid gas transportation, in transportation, agriculture, mining, chemical industry, machinery, construction, papermaking, textile, food, medical treatment , sports and other fields have a wide range of uses. Currently used ultra-high molecular weight polyethylene pipes, such as Chinese patent ZL98...
Claims
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Application Information
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