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Recycling method of polyolefin pipe containing hot melt adhesive

A technology of polyolefin and hot melt adhesive, which is applied in the field of power material recycling process, can solve the problems of not providing heat shrinkable sleeve recycling, etc., and achieve the effects of reducing cost risk, easy operation and good performance

Active Publication Date: 2016-06-15
HONGSHANG HEAT SHRINKABLE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, there is no method for recycling the heat-shrinkable sleeve

Method used

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  • Recycling method of polyolefin pipe containing hot melt adhesive
  • Recycling method of polyolefin pipe containing hot melt adhesive
  • Recycling method of polyolefin pipe containing hot melt adhesive

Examples

Experimental program
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Embodiment 1

[0021] According to the ratio of parts by weight, including:

[0022]

Embodiment 2

[0023] Embodiment 2: according to the ratio of parts by weight, including:

[0024]

Embodiment 3

[0025] Embodiment 3: according to the ratio in parts by weight, including:

[0026]

[0027] The embodiment of the present invention provides a method for recycling polyolefin pipes containing hot melt adhesive, which is characterized in that it comprises the following steps:

[0028] Masterbatch processing steps: unirradiated recovered pipes containing hot-melt adhesive heat-shrinkable sleeves are compounded according to the components in the above-mentioned embodiment 1, 2 or 3, and re-granulated by a single-screw banburying extruder. That is: After the internal mixer is melted and blended at 100-150 ° C, the single-screw extruder is used to granulate;

[0029] Extrusion step: Add the recycled masterbatch obtained by the above method to the corresponding outer layer polyolefin masterbatch at a ratio of 0-15%. The added amount of the recycled masterbatch is not 0. After mechanical mixing, use a single Screw extruder (with corresponding die and mandrel) to extrude at 100-1...

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Abstract

The invention provides a hot melt adhesive-containing polyolefin tubing recovery method, which comprises the following steps: using a single screw mixer extruder for granulation again on the recovered tubing of hot melt adhesive-containing thermal contraction shrinkable sleeving without irradiation, which can be the processes of melt blending at 100-150 DEG C by a mixer and then using the single screw extruder for granulation; adding the recovered master batch obtained by the method according to proportion of 0-15% in the corresponded external layer polyolefin master batch, performing with mechanical mixing, using the single screw extruder (matched with a corresponded die and a corresponded core rod) and extruding at 100-150 DEG C to obtain an extruded single-wall pipeline; performing radiation crosslinking on the extruded tubing with an energy electron accelerator with more than 2.0MeV, wherein the radiation dose is 7.0Mrad-15.0Mrad; employing a vacuum expansion device or an oil heating expansion device or a mechanical device for expanding the irradiated tubing by 2-3 times under 100-150 DEG C, cooling, and fixing to obtain the radiation cross-linking type thermal contraction sleeving products. The provided method can recover the hot melt adhesive-containing polyolefin tubing for saving the cost.

Description

technical field [0001] The invention relates to the technical field of power material recycling technology, in particular to a method for recycling polyolefin pipes containing hot melt adhesive. Background technique [0002] The heat shrinkable sleeve made of radiation cross-linked polyolefin is widely used in electric power, electronics, chemical industry and other industrial fields, mainly to provide insulation protection for the intermediate connection and terminal parts of wires and cables. In the automotive industry and many other special occasions that require strict sealing, heat-shrinkable sleeves containing hot-melt adhesives are often used. The inner layer is a hot-melt adhesive layer, and the outer layer is a polyolefin protective layer. Double-layer heat shrinkable sleeves When the tube shrinks, the outer layer shrinks, and the inner rubber layer melts to provide excellent sealing performance, so it is widely used. [0003] However, in the prior art, there is no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08L31/04C08L31/02C08K3/22C08K3/26C08K3/34C08J3/22C08J3/28C08J3/24C08J11/04F16L9/133B29C69/00B29C47/00B29C35/10B29B17/00B29B9/06B29B7/00
CPCY02P20/143Y02W30/62
Inventor 钟晓光翟永爱
Owner HONGSHANG HEAT SHRINKABLE MATERIALS
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