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Ultra-high molecular weight polyethylene alloy tube and preparation method thereof

A technology of ultra-high molecular weight and polyethylene, which is applied in the field of ultra-high molecular weight polyethylene alloy pipes and their preparation, which can solve the problems of reduced mechanical properties of pipes, low molecular weight of paraffin, large power consumption, etc., and achieves reduced melt viscosity and improved processing fluidity Good, high production efficiency effect

Inactive Publication Date: 2017-04-26
深州市工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low molecular weight of paraffin, the average molecular weight of ultra-high molecular weight polyethylene will decrease after adding, so the mechanical properties of the pipe will decrease, and the addition of low molecular paraffin will limit the reduction of processing melt viscosity. Extrusion speed is slow and power consumption is large

Method used

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  • Ultra-high molecular weight polyethylene alloy tube and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0037] A kind of ultra-high molecular weight polyethylene alloy pipe, its preparation method comprises the steps:

[0038] (1) 40 parts by weight of ultra-high molecular weight polyethylene with a molecular weight of 8 million, 35 parts by weight of polyethylene p-hydroxybenzoyl terephthalate, 6 parts by weight of maleic anhydride grafted polyethylene, B215 phenolic 1 weight part of antioxidant and 4 weight parts of calcium stearate are mixed evenly;

[0039] (2) Dry the above mixture at 100~120°C for 8 hours;

[0040] (3) Mix the above-mentioned dried raw materials evenly under high-speed stirring;

[0041] (4) Extrude the uniformly mixed material into the pipe through the extruder, where the processing temperature is: feeding section 120-180°C, compression section: 220-280°C, homogenization section 230-300°C, outlet 180-240°C ; Head extrusion pressure 10MPa.

[0042] The extruder is a conical twin-screw extruder.

Embodiment ２

[0044] A kind of ultra-high molecular weight polyethylene alloy pipe, its preparation method comprises the steps:

[0045] (1) 72 parts by weight of ultra-high molecular weight polyethylene with a molecular weight of 8 million, 50 parts by weight of polyethylene p-hydroxybenzoyl terephthalate, 10 parts by weight of maleic anhydride grafted polyethylene, B215 phenolic 2 parts by weight of antioxidant and 5 parts by weight of calcium stearate are mixed uniformly;

[0046] (2) Dry the above mixture at 100~120°C for 8 hours;

[0047] (3) Mix the above-mentioned dried raw materials evenly under high-speed stirring;

[0048] (4) Extrude the uniformly mixed material into the pipe through the extruder, where the processing temperature is: feeding section 120-180°C, compression section: 220-280°C, homogenization section 230-300°C, outlet 180-240°C ; Head extrusion pressure 9.8MPa.

[0049] The extruder is a conical twin-screw extruder.

Embodiment 3

[0051] A kind of ultra-high molecular weight polyethylene alloy pipe, its preparation method comprises the steps:

[0052] (1) 95 parts by weight of ultra-high molecular weight polyethylene with a molecular weight of 8 million, 50 parts by weight of polyethylene p-hydroxybenzoyl terephthalate, 10 parts by weight of maleic anhydride grafted polyethylene, B215 phenolic 2.5 parts by weight of antioxidant and 5 parts by weight of calcium stearate are mixed evenly;

[0053] (2) Dry the above mixture at 100~120°C for 8 hours;

[0054] (3) Mix the above-mentioned dried raw materials evenly under high-speed stirring;

[0055] (4) Extrude the uniformly mixed material into the pipe through the extruder, where the processing temperature is: feeding section 120-180°C, compression section: 220-280°C, homogenization section 230-300°C, outlet 180-240°C ; Head extrusion pressure 9.7MPa.

[0056] The extruder is a conical twin-screw extruder.

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Abstract

The invention provides an ultra-high molecular weight polyethylene alloy tube and a preparation method thereof. The tube comprises an alloy tube body and polyethylene composite layers composited on the inner wall and the outer wall of the alloy tube body; each polyethylene composite layer is prepared from, by weight, 40-95 parts of ultra-high molecular weight polyethylene, 3-50 parts of a macromolecule reinforced rheological agent, 2-10 parts of compatilizer, 0.1-2.5 parts of an antioxidant and 0.2-5 parts of additives. According to the ultra-high molecular weight polyethylene alloy tube and the preparation method thereof, the melting viscosity of processing can be reduced, the processing fluidity is improved, tube extrusion molding is prone to occurrence, the tube property is improved, the machine head resistance generated when processing is conducted is reduced, and the production efficiency is improved. More tubes are extruded every hour, the electric energy consumption is less, and the effects of saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention relates to the field of alloy composite pipe production, in particular to an ultra-high molecular weight polyethylene alloy pipe and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMW-PE) is a thermoplastic engineering plastic with excellent comprehensive properties. Because of its outstanding wear resistance, excellent impact resistance, excellent chemical corrosion resistance, noise reduction, low temperature resistance, good lubricity, and low friction coefficient, it is widely used in the preparation of pipes for conveying gas, Liquid (petroleum crude oil) and solid-containing mixed liquid (slag, fly ash, coal, etc.) have low resistance, no scaling, and energy saving during transportation. , Grain processing, chemical industry, petroleum, coal, mineral processing and other fields. [0003] However, due to the extremely high melt viscosity and poor processing fluidity of ultra-h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L67/02C08L51/06C08K5/13C08K5/098
CPCC08L23/06C08L2201/08C08L2203/18C08L2205/03C08L2207/068C08L67/02C08L51/06C08K5/13C08K5/098
Inventor 赵安赤刘萃张文雅杜天民
Owner 深州市工程塑料有限公司
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