Preparation method of special material for plastic pipe material produced by one-step chain extension hybrid polyethylene regeneration

A technology of plastic pipes and polyethylene, which is applied in the field of preparation of special materials for plastic pipes made from polyethylene regeneration, can solve the problems of unreachable mechanical properties and melt index, influence of recycled materials performance, and few fields for recycling, etc., and achieve various The effect of excellent performance, easy control, and lower melt index

Active Publication Date: 2019-04-19
HUBEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low-quality recycled materials have low recycling costs and wide sources, but they often have poor performance, and there are few areas available for recycling, so they cannot be used for regeneration to prepare high-performance products.
It is considered to mix the two, but if they are directly blended, the compatibility will be poor, and the mechanical properties and melt index cannot meet the requirements of special pipe materials, especially the recycling of high-density polyethylene (HDPE) resin and cleaning and salt. The salt floating polyethylene resin obtained by the flotation separation process, these different types of recycled resins have poor compatibility, which will have a great impact on the performance of recycled materials

Method used

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  • Preparation method of special material for plastic pipe material produced by one-step chain extension hybrid polyethylene regeneration
  • Preparation method of special material for plastic pipe material produced by one-step chain extension hybrid polyethylene regeneration
  • Preparation method of special material for plastic pipe material produced by one-step chain extension hybrid polyethylene regeneration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Weigh 1.2 parts of comonomer GMA, 0.3 parts of AAc and 0.3 parts of EA, and mix well;

[0053] (2) Weigh 1 part of active dispersant LA, 0.2 part of initiator DCP, 0.05 part of regulator CPL, 0.3 part of antioxidant 1010, and mix well;

[0054] (3) The blend obtained in (1) and (2) is artificially stirred to disperse evenly to obtain a chain extension solution;

[0055] (4) Weigh 5 parts of film recycled resin, 5 parts of salt floated polyethylene recycled resin, 60 parts of oil pot recycled resin and 30 parts of vat recycled resin, put it into a high-speed mixer and stir for 5 minutes to obtain a uniform blend ;

[0056] (5) Put the chain extension solution of step (3) and the blend of step (4) into a high-speed mixer and stir for 5 minutes to obtain the final blend;

[0057] (6) Add the mixture in step (5) into the twin-screw extruder to granulate. Zone 190°C, zone 5 185°C, head 180°C, screw speed 30r / min. The extruded strands are cooled by cooling water, drie...

Embodiment 2

[0059] (1) Weigh 1.3 parts of comonomer methyl GMA, 0.45 parts of AAc and 0.2 parts of EA, and mix well;

[0060] (2) Weigh 1 part of active dispersant LA, 0.3 part of initiator DCP, 0.07 part of regulator CPL, 0.4 part of antioxidant 1010, and mix well;

[0061] (3) The blend obtained in (1) and (2) is artificially stirred to disperse evenly to obtain a chain extension solution;

[0062] (4) Weigh 5 parts of film recycled resin, 5 parts of salt floated polyethylene recycled resin, 60 parts of oil pot recycled resin and 30 parts of vat recycled resin, put it into a high-speed mixer and stir for 5 minutes to obtain a uniform blend ;

[0063] (5) Put the chain extension solution of step (3) and the blend of step (4) into a high-speed mixer and stir for 5 minutes to obtain the final blend;

[0064] (6) Add the mixture in step (5) into the twin-screw extruder to granulate. Zone 190°C, zone 5 185°C, head 180°C, screw speed 30r / min. The extruded strands are cooled by cooling wat...

Embodiment 3

[0066] (1) Weigh 1.4 parts of comonomer GMA, 0.6 parts of AAc and 0.1 part of EA, and mix well;

[0067] (2) Weigh 1.5 parts of active dispersant LA, 0.4 part of initiator DCP, 0.1 part of regulator CPL, 0.5 part of antioxidant 1010, and fully mix them;

[0068] (3) The blend obtained in (1) and (2) is artificially stirred to disperse evenly to obtain a chain extension solution;

[0069] (4) Weigh 7 parts of film reclaimed resin, 8 parts of salt floated polyethylene reclaimed resin, 50 parts of oil pot reclaimed resin and 35 parts of vat reclaimed resin, put it into a high-speed mixer and stir for 5 minutes to obtain a uniform blend ;

[0070] (5) Put the chain extension solution of step (3) and the blend of step (4) into a high-speed mixer and stir for 5 minutes to obtain the final blend;

[0071] (6) Add the mixture in step (5) into the twin-screw extruder to granulate. Zone 190°C, zone 5 185°C, head 180°C, screw speed 30r / min. The extruded strands are cooled by cooling ...

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Abstract

The invention discloses a preparation method of a special material for a polyethylene regenerated manufacturing plastic pipe by chain extending and mixing through a one-step method, which solves the problems of high regeneration cost, complicated technology and poor property in the existing polyethylene regenerated manufacturing plastic pipe. The preparation method adopts the technical scheme that oil pot recycling resin, barrel recycling resin, thin film recycling resin, slat floating polyethylene recycling resin, a comonomer, an active dispersant, an initiator, glycidyl methacrylate, a regulator and an antioxidant are used as raw materials, and are subjected to chain extension and modification through the one-step method. The preparation method has the advantages that the technology is simple, the cost is low, the property requirement is met, and the recycling of low-quality recycling material is promoted.

Description

technical field [0001] The invention relates to the field of environmental protection regeneration, in particular to a method for preparing special materials for polyethylene regeneration to manufacture plastic pipes. Background technique [0002] As the most important general-purpose plastic, polyethylene (PE) has an extremely wide range of uses and a huge domestic consumption. Due to the wide variety of polyethylene and various modified polyethylenes entering the market, various additives such as antioxidants, colorants, fillers, and flame retardants will be added to polyethylene products with different performance requirements during the production process. etc., and some different types of resins, such as polypropylene and polystyrene, may also be mixed in, which leads to different recycling costs of different polyethylene products when they are discarded and recycled, and the properties of recycled materials from different sources are different, making it difficult to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/06C08F255/02C08F220/32C08F220/28C08F220/06B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08F255/02C08L51/06C08L2203/18C08L2207/20C08F220/325Y02P70/10
Inventor 姜澔徐恒李学锋王鹏
Owner HUBEI UNIV OF TECH
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