Polyethylene foaming thermal insulation pipe, and preparation method thereof

A technology for polyethylene foaming and thermal insulation pipes, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of poor thermal insulation performance and poor impact resistance, and achieve good impact resistance, Increased impact strength and improved melt flowability

Inactive Publication Date: 2016-06-01
QINGDAO DINGYI PLASTIC MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a polyethylene foam insulation pipe and its preparation method, which solves the problems of poor insulation performance and poor impact resistance of polyethylene pipes in the prior art

Method used

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  • Polyethylene foaming thermal insulation pipe, and preparation method thereof

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Effect test

Embodiment 1

[0047] A method for preparing polyethylene foam insulation pipes, comprising the following preparation steps:

[0048] 1) Weigh the raw materials of inner layer 3, middle layer 2 and outer layer 1 respectively by weight, i.e. 50 parts by weight of polyethylene foam, 0.1 part by weight of AC foaming agent, 0.1 part by weight of ACR foam regulator, and Mix the raw materials of each layer evenly;

[0049] 2) Put the mixed raw materials of the inner layer 3 into the first extruder, shape it through a vacuum sizing forming machine, and then pull it out by the first tractor to obtain an inner tube, and then send the inner tube to At the head of the co-extrusion type;

[0050] 3) Put the mixed raw materials of the middle layer 2 into the second extruder, the screw temperature of the second extruder is 70-200°C, the pressure is 15MPa, and the catalytic gas is passed into the screw , the catalytic gas is liquefied gas, the screw speed is 30rpm, so that the mixed material is melted to...

Embodiment 2

[0054] A method for preparing polyethylene foam insulation pipes, comprising the following preparation steps:

[0055]1) Weigh the raw materials of inner layer 3, middle layer 2 and outer layer 1 respectively by weight, i.e. 75 parts by weight of polyethylene foam, 0.2 parts by weight of AC foaming agent, 0.2 parts by weight of ACR foam regulator, and Mix the raw materials of each layer evenly;

[0056] 2) Put the mixed raw materials of the inner layer 3 into the first extruder, shape it through a vacuum sizing forming machine, and then pull it out by the first tractor to obtain an inner tube, and then send the inner tube to At the head of the co-extrusion type;

[0057] 3) Put the mixed raw materials of the middle layer 2 into the second extruder, the screw temperature of the second extruder is 70-200°C, the pressure is 20MPa, and the catalytic gas is passed into the screw , the catalytic gas is butane, and the screw speed is 70rpm, so that the mixed material is melted to t...

Embodiment 3

[0061] A method for preparing polyethylene foam insulation pipes, comprising the following preparation steps:

[0062] 1) Weigh the raw materials of inner layer 3, middle layer 2 and outer layer 1 respectively by weight, i.e. 80 parts by weight of polyethylene foam, 0.3 parts by weight of AC foaming agent, 0.4 parts by weight of ACR foam regulator, and Mix the raw materials of each layer evenly;

[0063] 2) Put the mixed raw materials of the inner layer 3 into the first extruder, shape it through a vacuum sizing forming machine, and then pull it out by the first tractor to obtain an inner tube, and then send the inner tube to At the head of the co-extrusion type;

[0064] 3) Put the mixed raw materials of the middle layer 2 into the second extruder, the screw temperature of the second extruder is 70-200°C, the pressure is 25MPa, and the catalytic gas is passed into the screw , the catalytic gas is liquefied gas, and the screw speed is 80rpm, so that the mixed material is mel...

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Abstract

The invention provides a polyethylene foaming thermal insulation pipe, and a preparation method thereof. The preparation method is used for solving problems of the prior art that thermal insulation properties and shock resistance of conventional solar energy pipelines are poor. The polyethylene foaming thermal insulation pipe possesses a three-layer structure; an outer layer is a protection layer; a middle layer is a thermal insulation layer; and an inner layer is a water delivery pipe. The thermal insulation layer comprises, by weight, 50 to 100 parts of a polyethylene foaming material, 0.1 to 0.6 part of an AC foaming agent, and 0.1 to 0.6 part of a foaming control agent. The polyethylene foaming thermal insulation pipe possesses the water delivery inner layer-the thermal insulation layer-the outer protection layer trinity structure; thermal insulation properties are better; the inner layer possesses antibacterial properties, so that pollution on fluid is not caused; foaming of the thermal insulation layer is realized with the polyethylene foaming material, the AC foaming agent, and ACR foaming control agent; the AC foaming agent and the ACR foaming control agent are mixed with polyethylene via physical blending, so that product surface is smooth, and impact resistance is excellent; and the outer protection layer made from a communication-grade cable material, and possesses relatively excellent aging resistance and ultraviolet resistance.

Description

technical field [0001] The invention relates to the field of solar water delivery pipelines, in particular to a polyethylene foam insulation pipe and a preparation method thereof. Background technique [0002] With the popularization of solar energy utilization, various types of solar water heaters have emerged as the times require. The main reason restricting the application of solar energy at present is the high cost. The high-temperature-resistant metal pipes of households are generally around 400-700 yuan, accounting for about 1 / 3. Reducing this part of the cost becomes one of the key factors to reduce the overall price. Metal pipes are relatively plastic in terms of corrosion resistance and installation convenience. The material is poor, and the world is advocating energy saving and consumption reduction, so people gradually turn their attention to plastic pipes. At present, the plastic pipes on the market are mainly cross-linked polyethylene pipes and a small amount of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L33/08C08J9/10B32B1/08B32B27/06B32B27/32B32B27/18B29C47/92B29C48/92
Inventor 杜连合
Owner QINGDAO DINGYI PLASTIC MACHINERY CO LTD
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