Enhancement ultra-high molecular weight polyethylene wound pipe and manufacture method therefor

A technology of ultra-high molecular weight and polyethylene, applied in the direction of pipes/pipe joints/fittings, pipes, rigid pipes, etc., can solve the problems of high longitudinal tensile strength, low hoop stress intensity, and large hoop stress of pipes, and achieve good performance Effects of flame retardancy and antistatic ability, high impact resistance, and improved ring stiffness

Inactive Publication Date: 2007-08-15
淄博寿山特种塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the molecular arrangement of the plastic pipe is oriented along the axial direction of the pipe during the extrusion process, so that the longitudinal tensile strength of the pipe is high and the hoop stress intensity is low. However, under the action of internal pressure, the hoop stress suffered by the pipe is greater than the tensile stress , so that the strength of the material is not fully exerted in terms of pressure resistance
[0004] In addition, due to the limitation of the strength of the plastic material itself, the plastic pipe still cannot meet the requirements in the field of high-pressure water supply and drainage, and the application field is limited to a certain extent.
Also because traditional production equipment is used to produce solid-wall pipes, the investment in equipment is large, and it is technically difficult to realize. So far, the production of large-diameter solid-wall plastic pipes greater than 2000mm has not been reported.

Method used

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  • Enhancement ultra-high molecular weight polyethylene wound pipe and manufacture method therefor
  • Enhancement ultra-high molecular weight polyethylene wound pipe and manufacture method therefor
  • Enhancement ultra-high molecular weight polyethylene wound pipe and manufacture method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Embodiment 1 makes the ultra-high molecular weight polyethylene winding pipe that is added with reinforcing material, flame retardant material and antistatic material

[0101] Weight ratio:

[0102] Plastic substrate: reinforcement material: flame retardant material: antistatic material = 1: 0.2: 0.2: 0.3;

[0103] Dosage: plastic substrate 100kg;

[0104] Reinforcement glass fiber 20kg;

[0105] Flame retardant material decabromodiphenyl ether 12kg;

[0106] Antimony trioxide 8kg;

[0107] Antistatic material Conductive carbon black 30kg; raw materials are commercially available industrial products.

[0108] (Note: The winding material is an ultra-high molecular weight polyethylene plastic substrate with a molecular weight ≥ 1.5 million; the welding material is high-density polyethylene; the same below.)

[0109] One method is: the reinforced ultra-high molecular weight polyethylene winding pipe is wound by multi-layer solid ultra-high molecular weight polyethylen...

Embodiment 2

[0133] Embodiment 2 makes the ultra-high molecular weight polyethylene pipe that adds reinforcing material

[0134] Weight ratio:

[0135] Plastic substrate: reinforcing material = 1:0.8;

[0136] Dosage: plastic substrate 100kg;

[0137] Reinforcement material glass fiber 80kg; raw materials are commercially available industrial products.

[0138] While winding the winding material (plastic solid profile compounded with reinforcing material) by the winding machine, the molten welding material is applied to the adjacent side of the winding winding material, and pressure is applied to melt and bond it into one; the winding The diameter is 2000mm; finally, the wound pipe wall is rolled by a rotary rolling device to make the pipe wall regular and smooth.

[0139] Using the above ratio to make a spiral pipe with a diameter of 2000mm and a standard size ratio (SDR) of 34.3, the results of its working pressure compared with the pure UHMW-PE solid wall pipe are as follows:

[014...

Embodiment 3

[0144] Embodiment 3 makes the ultra-high molecular weight polyethylene pipe that adds reinforcing material, wear-resisting material and antistatic material

[0145] Weight ratio:

[0146] Plastic substrate: reinforcement material: wear-resistant material: antistatic material = 1: 0.6: 0.2: 0.1;

[0147] Dosage: plastic substrate 100kg;

[0148] Reinforcement material carbon / graphite fiber 60kg;

[0149] Wear-resistant material silica powder (or silica sand or glass microspheres) 20kg;

[0150] Antistatic material Conductive carbon black 10kg; raw materials are commercially available industrial products.

[0151] Using the above ratio to make a spiral pipe with a diameter of 2000mm and a standard size ratio (SDR) of 26.0, the results of its working pressure compared with the pure UHMW-PE solid wall pipe are as follows:

[0152] standard size ratio

[0153] Note: The wear rate of the mortar is implemented according to the regulations of QB / T2668-2004. The wear ra...

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Abstract

The invention relates to method for producing strengthen macromolecule polyethylene coil tube, which uses at least one layer of macromolecule polyethylene section material as coil material alternatively or irregularly arranged, and nearby side walls are fused to connected or adhered by fused material, to be screwed to form tube wall. The coil material is drawn to direct the molecule longitudinally. The macromolecule polyethylene base material is added with strength material and/or flameproof material and/or static resistance composed. The fusing connecting material is plastic polymer or added with strength material and/or flameproof material and/or static resistance, to form plastic fused material. The strength material is distributed in the coil material and/or fusing connecting material, directionally distributed along the screw of high-strength coil tube. The invention has high strength, flameproof property and static resistance.

Description

technical field [0001] The invention belongs to the field of engineering components, and in particular relates to a reinforced ultra-high molecular weight polyethylene winding pipe and a preparation method thereof. Widely used in mines, steel plants, thermal power plants, chemical plants, oil fields, various acid liquids, lye, crude oil, refined oil, tailings slurry, coal water slurry, power plant ash discharge, slag discharge and other pipeline applications. Background technique [0002] Due to a series of superior properties such as light weight, corrosion resistance, small flow resistance, convenient construction, and long service life, plastic pipes are gradually replacing traditional pipes such as cast iron pipes, cement pipes, and ceramic pipes, and are increasingly widely used in the field of water supply and drainage. [0003] In the existing technology, the molecular arrangement of the plastic pipe is oriented along the axial direction of the pipe during the extrusi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/12F16L9/16B29C69/02B29C53/56B29C47/00B29C55/00B29K105/06B29K23/00
Inventor 李寿山李研
Owner 淄博寿山特种塑料有限公司
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