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Recycling and modification of waste cross-linked PE cable materials for production of special materials for pipes and its preparation method

A technology for special materials for pipes and cables, which is applied in the field of recycling and modifying waste cross-linked PE cable materials to produce special materials for pipes and its preparation, and can solve the problems of difficult reshaping, difficult crushing and melting, and difficult regeneration processing.

Active Publication Date: 2016-03-02
四川塑金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Cross-linked polyethylene cables are very difficult to regenerate because of cross-linking. Now cross-linked polyethylene is mostly used for heating and decomposing oil refining, but the pollution is extremely serious. Afterwards, the oil refining enterprises were banned by the state, and cross-linked polyethylene recycling has become the first choice for domestic plastic recycling. a big problem
[0003] Cross-linked PE is difficult to crush and melt because the cross-linked molecular structure forms a three-dimensional network structure, and recycled broken cross-linked PE is difficult to reshape because of its low fluidity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Preparation of waste and old cross-linked PE cable material recycling modification production pipe special material

[0025] Step 1: Raw material preparation, wash 40 parts by weight of recycled cross-linked PE cable fragments (broken into about 4-7mm in size) and 40 parts by weight of broken PE hollow blow molding products (broken into about 4-7mm in size) Dehydrate and dry.

[0026] Step 2: Take 15 parts by weight of LDPE blown film return granules, 5 parts by weight of POE, 0.15 parts by weight of calcium stearate and 0.15 parts by weight of PE wax, and the cross-linked PE cable crushing material and PE hollow blow molding product fragments in step 1 Put the ingredients together into the high mixer and mix for 3-5 minutes.

[0027] Step 3: Twin-screw extrusion granulation, the speed of the host machine is 30HZ, and the extrusion temperature of the screw is 165-200°C.

[0028] Step 4: Dry the granules and pack them.

Embodiment 2

[0030] The special material for recycled pipe produced in Example 1 and other pipe materials were tested for performance respectively, and compared with the following table 1:

[0031] Table I

[0032] serial number Test items Cross-linked PE recycling HDPE pipe material Example 1 Detection method 1 MFR g / 10min 5Kg —— 0.1-0.5 0.17 GB / T 3682 2 Tensile strength Mpa 28 20 24 GB / T1040 3 Yield strength MPa 28 20 24 GB / T1040 4 Elongation at break % 340 ≥200 287 GB / T1040

[0033] It can be seen from Table 1 that although the performance of cross-linked recycled materials is very good, the fluidity is very poor. At 5 kg, 190 ° C, the material cannot be extruded, and the life is difficult to process. According to the invention, the special material for cross-linked PE recycled modified pipes is produced. The fluidity is within the range of conventional HDPE pipe materials, the tensile strength is higher than that of new...

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Abstract

The invention discloses a special material for a tubular product produced by recovering and modifying a waste cross-linked PE (Poly Ethylene) cable material, and relates to regeneration of plastics. The special material is prepared from the following components in parts by weight: recovered cross-linked PE cable crushed sheet stocks, 30-50 parts of crushed sheet stocks of a PE hollow blow molding product, 5-20 parts of LDPE (Low-Density Polyethylene) blow molding feedback particles, 3-10 parts of POE (Polyolefin Elastomer), 0.1-0.3 part of calcium stearate and 0.2-1 part of PE wax. Compared with the prior art, the special material has the advantages that the mobility of the special material for the tubular product produced by recovering and modifying the waste cross-linked PE cable material, which is disclosed by the invention, is within a conventional HDPE (High-Density Polyethylene) tubular product material range, the tensile strength is greater than that of a novel material of the HDPE tubular product, and the breaking elongation further satisfies the demand. The general advantage of the special material disclosed by the invention is even superior to that of the new material.

Description

technical field [0001] The invention relates to a special material for producing pipe materials through recovery and modification of waste cross-linked PE cable materials and a preparation method thereof. Background technique [0002] Cross-linked polyethylene cables are very difficult to regenerate because of cross-linking. Now cross-linked polyethylene is mostly used for heating and decomposing oil refining, but the pollution is extremely serious. Afterwards, the oil refining enterprises were banned by the state, and cross-linked polyethylene recycling has become the first choice for domestic plastic recycling. A big problem. [0003] Cross-linked PE is difficult to crush and melt because the cross-linked molecular structure forms a three-dimensional network structure, and recycled broken cross-linked PE is difficult to reshape because of its low fluidity. Contents of the invention [0004] One of the purposes of the present invention is to provide a special material fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/098B29B9/06
CPCB29B9/06C08L23/06C08L2205/025C08L2205/035C08L2205/08C08L2207/066C08L23/0815C08K5/098
Inventor 乔江浩陈道明
Owner 四川塑金科技有限公司