High density polyethylene and PET alloy pipe and preparation method thereof

A high-density polyethylene and alloy pipe technology, applied in the field of plastic pipe processing, can solve the problems of pipes that cannot be welded, poor weldability and toughness, and quality accidents, so as to reduce and eliminate quality accidents, reduce material flow resistance, and improve production efficiency effect

Inactive Publication Date: 2014-11-19
FUJIAN BODA PLASTIC IND NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the relatively small elastic modulus of high-density polyethylene materials, the rigidity and dimensional stability of high-density polyethylene products are poor, and the wear resistance and fatigue resistance of high-density polyethylene materials are also relatively poor
Pipe products made of high-density polyethylene are often scrapped because the deformation of the pipe affects the welding quality, and even the pipe cannot be welded.
Moreover, due to the poor wear resistance of high-density polyethylene pipes, it is relatively easy to cause quality accidents due to pipe wear in the application of non-excavation technology in urban water supply pipe networks.
[0005] However, PET has relatively high glass transition temperature and melting point. At normal processing temperatures, the crystallization speed is slow and the impact toughness is poor. If PET materials are used alone to process pipe products, the weldability and toughness are poor, which cannot meet the use requirements.

Method used

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  • High density polyethylene and PET alloy pipe and preparation method thereof
  • High density polyethylene and PET alloy pipe and preparation method thereof
  • High density polyethylene and PET alloy pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] A kind of preparation method of high-density polyethylene and PET alloy pipe, it comprises the following steps:

[0028] 1) Weighing raw materials: Weighing PE100, PET, compatibilizer, processing aid, and concentrated color masterbatch according to the weight ratio of each component;

[0029] 2) Kneading process: Put the weighed raw materials into the mixer in sequence according to the proportion, mix them uniformly at 70°C-110°C to form a primary mixture, and dry for 20-30 minutes to obtain a secondary mixture;

[0030] 3) Extrusion molding process: Put the secondary compound into the parallel twin-screw extruder, and add a reinforcing agent into the fiber inlet of the extruder, and control the adding ratio of the reinforcing agent by adjusting the fiber feeding speed and the extrusion speed of the main machine , Extruded to obtain a tube blank, during the extrusion process, the screw temperature is 40-60°C, the barrel temperature is 190-210°C, and the mold temperature...

Embodiment 1

[0033] A kind of preparation method of high-density polyethylene and PET alloy pipe, it comprises the following steps:

[0034] 1) Weigh raw materials: Weigh PE100, PET, compatibilizer, processing aid, concentrated color masterbatch according to the weight ratio of each component,

[0035]

[0036]

[0037] 2) Kneading process: Put the weighed raw materials into the mixer in sequence according to the proportion, mix them uniformly at 70°C-110°C to form a primary mixture, and dry for 20-30 minutes to obtain a secondary mixture;

[0038] 3) Extrusion molding process: Put the secondary compound into the parallel twin-screw extruder, and add a reinforcing agent into the fiber inlet of the extruder, and control the adding ratio of the reinforcing agent by adjusting the fiber feeding speed and the extrusion speed of the main machine , Extruded to obtain a tube blank, during the extrusion process, the screw temperature is 40-60°C, the barrel temperature is 190-210°C, and the mo...

Embodiment 2

[0041] A kind of preparation method of high-density polyethylene and PET alloy pipe, it comprises the following steps:

[0042] 1) Weigh raw materials: Weigh PE100, PET, compatibilizer, processing aid, concentrated color masterbatch according to the weight ratio of each component,

[0043]

[0044] 2) Kneading process: Put the weighed raw materials into the mixer in sequence according to the proportion, mix them uniformly at 70°C-110°C to form a primary mixture, and dry for 20-30 minutes to obtain a secondary mixture;

[0045] 3) Extrusion molding process: Put the secondary compound into the parallel twin-screw extruder, and add a reinforcing agent into the fiber inlet of the extruder, and control the adding ratio of the reinforcing agent by adjusting the fiber feeding speed and the extrusion speed of the main machine , Extruded to obtain a tube blank, during the extrusion process, the screw temperature is 40-60°C, the barrel temperature is 190-210°C, and the mold temperature...

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Abstract

The present invention relates to the field of plastic pipeline processing, particularly to a high density polyethylene and PET alloy pipe and a preparation method thereof, wherein the components of the alloy pipe comprise, by weight, 100 parts of PE100, 20-50 parts of PET, 5-8 parts of a compatibilizer, 10-25 parts of a reinforcing agent, 0.2-1.0 part of a processing aid, and 0.8-1.5 parts of a concentrated color master batch. The invention further discloses the preparation method, which comprises: carrying out compatibilization blending modification on PET and high density polyethylene, weighing raw materials according to the scientific component formula, and performing a kneading process, extrusion forming and other processes to obtain the high density polyethylene and PET alloy pipe so as to increase strength, modulus, surface hardness, heat resistance, wear resistance and fatigue resistance strength of the pipeline product, such that the pipeline product is more suitable for the fields of trenchless technology and the like so as to broaden the use occasion of the pipeline product and reduce and eliminate occurrence of quality accidents.

Description

technical field [0001] The invention relates to the field of plastic pipe processing, in particular to a high-density polyethylene and PET alloy pipe used in the field of trenchless technology and a preparation method thereof. technical background [0002] High-density polyethylene is a high-crystallinity, non-polar thermoplastic resin with a crystallinity of 80-90%. High-density polyethylene resin is non-toxic, tasteless and odorless white particles, which can be used for extrusion molding of drinking water pipes. Its melting point is about 130°C, and its relative density is 0.941-0.960. High-density polyethylene has good cold resistance, good toughness, good chemical stability, good dielectric properties, and environmental stress cracking resistance. The melting temperature range of high-density polyethylene is between 200-250 ° C, and the processing fluidity is good. It has good chemical stability, is insoluble in any organic solvent at room temperature, and is corrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L67/02C08K13/04C08K7/14C08K3/04C08K5/098B29C47/92B29C48/92
CPCC08L23/06B29C48/92B29C2948/92704C08J3/226C08J2323/06C08J2423/06C08L2201/08C08L2203/18C08L2205/025C08L2205/035C08L2205/08C08L2207/062C08L2207/066C08L67/02C08L23/0884C08L27/18C08K13/04C08K7/14C08K3/04C08K5/098
Inventor 陈源喜
Owner FUJIAN BODA PLASTIC IND NEW MATERIAL
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