A kind of high-density polyethylene and pet alloy pipe and preparation method thereof

A high-density polyethylene and alloy pipe technology, which is applied in the field of plastic pipe processing, can solve the problems of pipes that cannot be welded, poor rigidity and dimensional stability, poor weldability and toughness, etc., to reduce and eliminate quality accidents, expand use occasions, The effect of reducing material flow resistance

Inactive Publication Date: 2017-01-04
FUJIAN BODA PLASTIC IND NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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.
[0006] 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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  • A kind of high-density polyethylene and pet alloy pipe and preparation method thereof
  • A kind of high-density polyethylene and pet alloy pipe and preparation method thereof
  • A kind of high-density polyethylene and pet alloy pipe and preparation method thereof

Examples

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preparation example Construction

[0028] A kind of preparation method of high-density polyethylene and PET alloy pipe, it comprises the following steps:

[0029] 1) Weighing raw materials: Weighing PE100, PET, compatibilizer, processing aid, and concentrated color masterbatch according to the weight ratio of each component;

[0030] 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;

[0031] 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 the tube blank, during the extrusion process, the screw temperature is 40-60°C, the barrel temperature is 190-210°C, the mold temperature i...

Embodiment 1

[0034] A kind of preparation method of high-density polyethylene and PET alloy pipe, it comprises the following steps:

[0035] 1) Weigh raw materials: Weigh PE100, PET, compatibilizer, processing aid, concentrated color masterbatch according to the weight ratio of each component,

[0036]

[0037]

[0038] 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;

[0039] 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 addition ratio of the reinforcing agent by adjusting the fiber feeding speed and the extrusion speed of the main machine , Extruded to obtain the tube blank, during the extrusion process, the screw temperature is 40-60°C, the barrel temperature is 190-210°C, the mo...

Embodiment 2

[0042] A kind of preparation method of high-density polyethylene and PET alloy pipe, it comprises the following steps:

[0043] 1) Weigh raw materials: Weigh PE100, PET, compatibilizer, processing aid, concentrated color masterbatch according to the weight ratio of each component,

[0044]

[0045] 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;

[0046] 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 invention relates to the field of plastic pipe processing, in particular to a high-density polyethylene and PET alloy pipe and a preparation method thereof. The composition formula of the alloy pipe by weight includes 100 parts of PE100 and 20-50 parts of PET, corresponding to 5-8 parts of compatibilizer, 10-25 parts of reinforcing agent, 0.2-1.0 parts of processing aid, 0.8-1.5 parts of concentrated color masterbatch; at the same time, its preparation method is disclosed, which is to carry out compatibilization and blending of PET and high-density polyethylene Modification, and according to the above-mentioned scientific component formula, high-density polyethylene and PET alloy pipes are obtained by weighing raw materials, kneading technology, extrusion molding and other processes, thereby improving the strength, modulus, surface hardness, and durability of pipe products. Heat resistance, wear resistance and fatigue resistance make pipeline products more suitable for fields such as trenchless technology, broaden the application occasions of pipeline products, and reduce and eliminate the 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. [0002] technical background [0003] 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L67/02C08K13/04C08K7/14C08K3/04C08K5/098B29C47/92
Inventor 陈源喜
Owner FUJIAN BODA PLASTIC IND NEW MATERIAL
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