Ultrahigh molecular-weight polyethylene composite tubing and production method thereof

A polyethylene composite pipe, ultra-high molecular weight technology, applied in the direction of pipes/pipe joints/fittings, hoses, pipes, etc., can solve the problems of melt fracture, poor cutting resistance, poor creep resistance, etc. The effect of comprehensive manufacturing cost, improving pipe strength and reducing hoop deformation

Inactive Publication Date: 2013-07-17
QINGDAO ZHONG KE HAO TAI NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, UHMWPE has low tensile strength, poor creep resistance and poor cutting resistance.
Simple ultra-high molecular weight polyethylene pipes have low compressive strength, are prone to creep, and have poor resistance to natural damage, so they cannot be used as pipelines for the above materials
In addition, due to

Method used

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  • Ultrahigh molecular-weight polyethylene composite tubing and production method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0045] An ultra-high molecular weight polyethylene composite pipe has a 5-layer composite structure. The core pipe is an ultra-high molecular weight polyethylene pipe wound by stretched oriented sheets. The outer surface of the core pipe is coated with adhesive CILBOND 24, natural rubber, rubber Wrapped with a helically wound fiberglass tape 110 mm wide, the outer layer is an HDPE pipe layer.

[0046] The production method of the described high-strength ultra-high molecular weight polyethylene composite pipe comprises the following steps:

[0047] ①Extrude the ultra-high molecular weight polyethylene material with a molecular weight of 3.5 million to form a sheet, and then pass through the online straight section of the sheet and cut it into sheets of a certain width with a gang saw along the extrusion direction. The sheet is drawn at 145°C for 3.5 High-strength sheet is formed by stretching and drawing orientation;

[0048] ② Wrap the stretched and oriented ultra-high molecu...

Embodiment 2

[0060] An ultra-high molecular weight polyethylene composite pipe has a 5-layer composite structure. The core pipe is an ultra-high molecular weight polyethylene pipe wound by stretched oriented sheets. The outer surface of the core pipe is coated with polyethylene adhesive and styrene-butadiene rubber. The rubber is wrapped with a helically wound carbon fiber strip 110mm wide, with an outer layer of HDPE tubing.

[0061] The production method of the described high-strength ultra-high molecular weight polyethylene composite pipe comprises the following steps:

[0062] ①Extrude the ultra-high molecular weight polyethylene material with a molecular weight of 3.5 million to form a sheet, and then pass through the online straight section of the sheet and cut it into sheets of a certain width with a gang saw along the extrusion direction. The sheet is drawn at 145°C for 3.5 High-strength sheet is formed by stretching and drawing orientation;

[0063] ② The stretched and oriented u...

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Abstract

The invention discloses an ultrahigh molecular-weight polyethylene composite tubing and a production method thereof. The tubing is of five-layer composite structure, a core layer (1) is formed by winding drawn and oriented sheets, an adhesive layer (2) and a vulcanized rubber layer (3) are coated on the outer surface of the core layer, a helically wound reinforced fiber layer (4) is wrapped outside the vulcanized rubber layer, and the outermost layer is an HDPE (high-density polyethylene) layer (5). The production method includes: firstly, drawing and orienting ultrahigh molecular-weight polyethylene to form sheets; secondly, winding the sheets of the first step to form the core layer, winding a circular tube by drafted and oriented ultrahigh molecular-weight polyethylene sheets, welding adjacent tubing seams to form a continuous core tube; thirdly, coating adhesives on the outer surface of the core layer; fourthly, winding the vulcanized rubber layer on the surface of the adhesive layer formed in the third step; fifthly, winding a fiber belt on the surface of the vulcanized rubber layer; sixthly, wrapping an HDPE melt layer on the outer surface of the fiber belt to form a composite tubing; and seventhly, vulcanizing the composite tubing formed in the sixth step.

Description

technical field [0001] The invention belongs to the technical field of high-performance composite pipes, in particular to an ultra-high molecular weight polyethylene composite pipe and a production method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is a thermoplastic engineering plastic with a linear structure and excellent comprehensive properties. Corrosion, non-toxic and environmentally friendly, not easy to absorb water, low density and other properties, it is known as "amazing plastic" at home and abroad. The excellent physical and mechanical properties of UHMWPE make UHMWPE pipes widely used in various fields of the national economy, especially as engineering pipes for conveying particles, powder materials, slurries, and solid-liquid mixtures. The application fields are extremely broad. [0003] There is a long coastline in the east of my country. It is more difficult to dredge the bay than the river. Coral reefs, pebbles, ...

Claims

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Application Information

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IPC IPC(8): F16L9/16F16L11/08F16L11/24B29C69/00B29L23/00
Inventor 谈述战王德禧于水程真真刘毅钟涛
Owner QINGDAO ZHONG KE HAO TAI NEW MATERIAL SCI & TECH
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