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High-density polyethylene composition and preparation method thereof

A high-density polyethylene and composition technology, applied in electrical components, magnetic field/electric field shielding, shielding materials, etc., can solve the problems of unstable electromagnetic shielding performance, poor wear resistance and heat resistance, poor toughness and elasticity, etc. Achieve the effect of good elasticity, high softening point, improved wear resistance and heat resistance

Inactive Publication Date: 2019-01-29
清远市知途自动化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the rapid development of the electronics industry, the number of various civilian and military electronic products has increased sharply. Electromagnetic interference (EMI) has become a social hazard. It is of great significance to develop compositions with electromagnetic shielding functions. However, the existing electromagnetic The electromagnetic shielding performance of the shielding composition is unstable. Patent No. 2009102124366 discloses an electromagnetic shielding polyethylene material and its manufacturing process. However, although the polyethylene material has an electromagnetic shielding function, its wear resistance and heat resistance in actual use are generally poor, and the finished products prepared with this material have the defects of low softening point, high friction coefficient, poor toughness and elasticity, and low mechanical strength; for this reason, we propose a preparation method of high-density polyethylene composition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-density polyethylene composition comprises the following components (calculated in parts by weight): 100 parts of high-density polyethylene, 50 parts of carbon fiber, 50 parts of carbon black, 50 parts of polyamide, and 80 parts of rubber.

[0019] A kind of preparation method of high-density polyethylene composition, comprises the following steps:

[0020] Step 1: Prepare a predetermined amount of high-density polyethylene, carbon fiber, carbon black, polyamide and rubber and mix them together, use a high-speed mixer to stir evenly, the stirring time is 5 minutes, the stirring speed is 800 rpm, and the temperature during stirring Set it to 35 degrees Celsius and make a mixture;

[0021] Step 2: Add an organic solvent for dissolution to the mixture obtained in Step 1, and stir evenly while heating to obtain a high-density polyethylene composition.

[0022] Further, the heating temperature in step 2 is 150°C.

[0023] Further, the organic solvent in step 2 is pe...

Embodiment 2

[0025] A high-density polyethylene composition comprises the following components (calculated in parts by weight): 150 parts of high-density polyethylene, 40 parts of carbon fiber, 40 parts of carbon black, 40 parts of polyamide and 60 parts of rubber.

[0026] A kind of preparation method of high-density polyethylene composition, comprises the following steps:

[0027] Step 1: Prepare a predetermined amount of high-density polyethylene, carbon fiber, carbon black, polyamide and rubber to mix together, use a high-speed mixer to stir evenly, the stirring time is 8 minutes, the stirring speed is 900 rpm, and the temperature during stirring Set it to 40 degrees Celsius and make a mixture;

[0028] Step 2: Add an organic solvent for dissolution to the mixture obtained in Step 1, and stir evenly while heating to obtain a high-density polyethylene composition.

[0029] Further, the heating temperature in step 2 is 180°C.

[0030] Further, the organic solvent in step 2 is trichlore...

Embodiment 3

[0032] A high-density polyethylene composition comprises the following components (calculated in parts by weight): 200 parts of high-density polyethylene, 30 parts of carbon fiber, 30 parts of carbon black, 30 parts of polyamide and 50 parts of rubber.

[0033] A kind of preparation method of high-density polyethylene composition, comprises the following steps:

[0034] Step 1: Prepare a predetermined amount of high-density polyethylene, carbon fiber, carbon black, polyamide and rubber and mix them together. Use a high-speed mixer to stir evenly. The stirring time is 10 minutes, the stirring speed is 1000 rpm, and the temperature during stirring is Set it to 45 degrees Celsius and make a mixture;

[0035] Step 2: Add an organic solvent for dissolution to the mixture obtained in Step 1, and stir evenly while heating to obtain a high-density polyethylene composition.

[0036] Further, the heating temperature in step 2 is 200°C.

[0037] Further, the organic solvent in step 2 i...

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Abstract

The invention discloses a high-density polyethylene composition. The composition comprises the following components in parts by weight: 100-200 parts of high-density polyethylene, 30-50 parts of carbon fibers, 30-50 parts of carbon black, 30-50 parts of polyamide and 50-80 parts of rubber. The invention also discloses a preparation method of the high-density polyethylene composition. The method comprises the following steps: equipping a mixed material, and adding an organic solvent and performing heating and stirring. The formulation of the composition is relatively reasonable, the high-density polyethylene composition takes high-density polyethylene as the main raw material, and the composition material can achieve a stable electromagnetic shielding function by adding carbon fibers and carbon black. At the same time, the wear resistance and the heat resistance of the composition material are greatly improved by adding polyamide and rubber in the formulation. The products prepared by the composition material can achieve the advantages of high softening point, low friction coefficient, high toughness, high impact resistance, good elasticity and high mechanical strength, so that theneeds of the market are satisfied.

Description

technical field [0001] The invention relates to the technical field of polyethylene compositions, in particular to a high-density polyethylene composition and a preparation method thereof. Background technique [0002] High-density polyethylene (High Density Polyethylene, referred to as "HDPE"), also known as low-pressure polyethylene, is a translucent shape with high crystallinity and a certain degree of non-polar surface. PE has excellent resistance to most domestic and industrial chemicals; [0003] HDPE is a highly crystalline, non-polar thermoplastic resin. High-density polyethylene is a white powder granular product, non-toxic and tasteless, with a density in the range of 0.940-0.976g / cm3; a crystallinity of 80%-90%, a softening point of 125-135°C, and a service temperature of up to 100 ℃; melting temperature 120 ~ 160 ℃. It has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, and good mechanical strength. Suitable for...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L77/00C08L21/00C08K7/06C08K3/04H05K9/00
CPCC08L23/06C08L2201/08C08L2205/03C08L2207/062H05K9/009C08L77/00C08L21/00C08K7/06C08K3/04
Inventor 罗彬彬
Owner 清远市知途自动化科技有限公司