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Dense shish-kebab super-strong and super wear-resistant polyethylene composite material and preparation method thereof

A composite material and polyethylene technology, applied in the field of composite materials, can solve the problems that the mechanical properties and friction resistance of HDPE-based materials cannot be achieved, the use of HDPE is limited, and the preparation process is complicated, so as to improve the interface bonding effect, reduce performance loss, Simple and easy-to-achieve effects of process equipment

Active Publication Date: 2019-02-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has been reported that UHMWPE and hierarchical structures have been used to prepare reinforced HDPE-based materials, the mechanical properties and friction resistance of the prepared HDPE-based materials still cannot reach the level equivalent to most engineering plastics, which limits the use of HDPE in Actual use as a substitute for engineering plastics
In addition, most of the methods used in these reports also require a pretreatment process, making the preparation process relatively more complicated and environmentally unfriendly

Method used

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  • Dense shish-kebab super-strong and super wear-resistant polyethylene composite material and preparation method thereof
  • Dense shish-kebab super-strong and super wear-resistant polyethylene composite material and preparation method thereof
  • Dense shish-kebab super-strong and super wear-resistant polyethylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of HDPE / UHMWPE composite material of the present embodiment, specific preparation steps are as follows:

[0027] (1) As a comparison, pure high-density polyethylene is dried at 75°C for 10 hours in a blast drying oven to remove residual moisture; the dried HDPE is extruded by means of a twin-screw extruder, and the conveying compression section of the extruder , The temperature of the melting section and the metering section is set to 120-200°C, 200-230°C, and 220-190°C in sequence, the screw speed is set to 100 rpm, and the feeding speed is 10 rpm. Traction by a granulator, granulation, and drying for later use;

[0028] (2) In the process of melt molding, the method of superimposed oscillation and push-pull composite force field is used for molding: the dried material obtained in (1) is molded by this method, and its main parameters are set to: screw The barrel temperature is set to 210°C, the plunger barrel temperature is set to 210°C, t...

Embodiment 2

[0030] A kind of preparation method of HDPE / UHMWPE composite material of the present embodiment, specific preparation steps are as follows:

[0031] (1) Preparation of HDPE / UHMWPE premix: First, dry high-density polyethylene and ultra-high molecular weight polyethylene in a blast drying oven at 75°C for 10 hours to remove residual moisture; then, dry the dried HDPE and UHMWPE According to the mass ratio of 95:5, a high-speed mixer was used to mix for 2 minutes at a speed of 10,000 rpm to obtain a premix;

[0032](2) Preparation of HDPE / UHMWPE blend: The premix is ​​directly melted and blended by means of a twin-screw extruder. ~230°C, 220~190°C, the screw speed is set to 100 rpm, and the feeding speed is 10 rpm. Traction by a granulator, granulation, and drying for later use;

[0033] (3) In the melt molding process, the method of superimposing oscillation and push-pull composite force field is molded: the dried material obtained in (2) is molded by this method, and its main...

Embodiment 3

[0035] A kind of preparation method of HDPE / UHMWPE composite material of the present embodiment, specific preparation steps are as follows:

[0036] (1) Preparation of HDPE / UHMWPE premix: First, dry high-density polyethylene and ultra-high molecular weight polyethylene in a blast drying oven at 75°C for 10 hours to remove residual moisture; then, dry the dried HDPE and UHMWPE According to the mass ratio of 90:10, a high-speed mixer was used to mix for 2 minutes at a speed of 10,000 rpm to obtain a premix;

[0037] (2) Preparation of HDPE / UHMWPE blend: The premix is ​​directly melted and blended by means of a twin-screw extruder. ~230°C, 220~190°C, the screw speed is set to 100 rpm, and the feeding speed is 10 rpm. Traction by a granulator, granulation, and drying for later use;

[0038] (3) In the melt molding process, the method of superimposing oscillation and push-pull composite force field is molded: the dried material obtained in (2) is molded by this method, and its ma...

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Abstract

The invention belongs to the field of composite materials, and discloses a dense shish-kebab super-strong and super wear-resistant polyethylene composite material and a preparation method thereof. Thepreparation method comprises the steps that high-density polyethylene and ultra-high molecular weight polyethylene are mechanically mixed after drying to obtain a premixed material, then melt blending is performed by an extruder, and granulation and drying are performed to obtain a blend granular material; and the obtained blend granular material is subjected to molding forming by means of superimposed oscillation and pushing and pulling a compounding force field in the melt molding forming process, and the dense shish-kebab super-strong and super wear-resistant polyethylene composite material is prepared and obtained. The preparation method can effectively improve the interfacial bonding effect of HDPE and UHMWPE without adding any compatilizer, the obtained composite material has denseshish-kebab from outside to inside, the internal crystal structure tends to be unified, and the mechanical properties and tribological properties of the obtained composite material are greatly improved.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a dense string crystallized super-strength and super wear-resistant polyethylene composite material and a preparation method thereof. Background technique [0002] As one of the most commonly used general-purpose plastics, high-density polyethylene (HDPE) is widely used in food packaging due to its strong crystallization ability, high crystallinity, low price, excellent thermal processability, and outstanding moisture and solvent resistance. , chemical industry, daily necessities and other fields. However, due to its slightly lower mechanical strength and poor mechanical wear resistance, it is difficult to meet the needs of replacing engineering plastics. In recent years, looking for a simple and green processing method to improve the strength, modulus, toughness and wear resistance of HDPE to broaden its application in engineering plastic substitute products has b...

Claims

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Application Information

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IPC IPC(8): B29C43/00B29B9/06B29C43/02B29K23/00
CPCB29B9/06B29C43/003B29C43/02B29K2023/065B29K2023/0683
Inventor 彭响方况太荣陈斌艺刘通
Owner SOUTH CHINA UNIV OF TECH
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