Double-layer polyethylene composite tubular product with ultrahigh molecular weight

A polyethylene composite pipe, ultra-high molecular weight technology, applied in the direction of pipes/pipe joints/fittings, pipes, rigid pipes, etc., to achieve long service life, wide application range, and eliminate the pressure in the pipe or the effect of corrosion or damage by corrosive media

CN102242834AInactive Publication Date: 2011-11-16JIANGSU SHENSHI NEW MATERIAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-11-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a double-layer polyethylene composite tubular product with ultrahigh molecular weight, belonging to the technical field of tubular products. The tubular product comprises an inner wall, a metal layer and an outer wall; the metal layer consists of a steel strip layer and a steel wire layer; the steel strip layer is arranged along the direction parallel to the tubular product axial lead equidistantly, the steel strip thickness is 0.5-3 millimeters, and the space between the steel strips is 10-20millimeters; an ultrahigh molecular weight polyethylene hot melt adhesive is coated on the steel strip layer with the coating layer thickness of 0.7-3.0millimeters; the steel wire layer is of a structure that the packed steel strip layer is spiral wound at the direction vertical to the tubular product axial lead, wherein the steel wire is a spring steel wire, and the diameter of the steel wire is 0.8-2.5millimeters; and the materials of the inner wall and the outer wall are polyethylene with molecular weight more than 2.5 million units. The tubular product provided by the invention has the advantages of reasonable structural design, high abrasion and corrosion resistance performances and high bearing capability, the optimal pressure can reach 16MPa, and is the double-layer polyethylene composite tubular product with ultrahigh molecular weight which has wide application wide and long service life.
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Description

technical field

[0001] The invention relates to a polyethylene pipe, in particular to a double-layer ultra-high molecular weight polyethylene composite pipe, which is mainly used in petroleum, chemical, mining, construction and other industries. Background technique

[0002] In the prior art, there are multiple structures of composite pipes lined with steel wires. For example, CN2202838Y discloses a composite pipe with a layer of metal braided mesh sandwiched between the inner wall and the outer wall of the pipe; CN2142168Y discloses at least one layer of wound steel wire layer and plastic A composite pipe with an adhesive layer between the core pipe and the plastic outer layer; the impact strength, tensile strength, wear resistance, environmental cracking resistance and fatigue resistance of the above structural pipes are all low, and its bearing pressure can only reach 2.5MPa. There are also polyethylene or silane crosslinked polyethylene materials as the inner wall of th...

Examples

Embodiment

[0019] The invention as figure 1 As shown, a double-layer ultra-high molecular weight polyethylene composite pipe is provided as a four-layer composite structure, including an inner wall, a metal layer, and an outer wall. The metal layer is placed between the inner wall and the outer wall, and the steel strip layer and Composed of steel wire layers, the steel belt layer is placed between the steel wire layer and the inner wall, and the steel wire layer is placed between the steel belt layer and the outer wall.

[0020] The steel belt layers are equidistantly arranged along the direction parallel to the axis of the pipe, the thickness of the steel belts is 0.5-3 mm, and the distance between the steel belts is 10-20 mm.

[0021] The steel strip layer is coated with polyethylene hot-melt adhesive, which is available in the market, and its coating thickness is 0.7-3.0 mm.

[0022] The steel wire layer is in a spiral winding structure wrapped with a steel belt layer in a direction...