Polyethylene composite material for rotationally-molded buried product

A composite material and rotomolding technology, which is applied in the direction of filter screen, grid, solid separation, etc., can solve the problems of rough internal and external surfaces, inability to release the mold, product sticking film, etc., and achieve the effect of simple preparation method

Active Publication Date: 2016-06-29
ZHEJIANG ROTOUN PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicant found in the research that simply using glass fiber reinforced materials for rotomolding will cause defects such as product mucous film, inability to release the mold, and very rough inner and outer surfaces, which cannot be solved in the existing technical solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]94Kg of high-density polyethylene, 5Kg of alkali-free glass fiber and 1Kg of maleic anhydride grafted polyethylene are manufactured into glass fiber reinforced high-density polyethylene particles in a twin-screw granulator according to the formula ratio. The process parameters are: temperature 150- 200°C, speed 600rpm, head pressure 0.1MPa. Grind the granulated glass fiber reinforced high density polyethylene particles in a plastic mill to make glass fiber reinforced high density polyethylene powder. 65°C. The linear low-density polyethylene is ground in a plastic mill to produce linear low-density polyethylene fine powder. The process parameters are sieve mesh diameter of 600 μm, grinding disc rotation speed of 3800 rpm, and grinding disc outlet temperature of 65°C. The linear low-density polyethylene is ground in a plastic mill to make linear low-density polyethylene coarse powder. The process parameters are two layers of sieves placed in the sieving device of the mil...

Embodiment 2

[0038] 40Kg of high-density polyethylene, 50Kg of alkali-free glass fiber and 10Kg of maleic anhydride grafted polyethylene are manufactured into glass fiber reinforced high-density polyethylene granules in a twin-screw granulator according to the formula ratio. The process parameters are: temperature 150- 200°C, speed 400rpm, head pressure 0.5MPa. Grind the granulated glass fiber reinforced high density polyethylene particles in a plastic mill to make glass fiber reinforced high density polyethylene powder. 65°C. The linear low-density polyethylene is ground in a plastic mill to produce linear low-density polyethylene fine powder. The process parameters are sieve mesh diameter of 600 μm, grinding disc rotation speed of 3800 rpm, and grinding disc outlet temperature of 65°C. The linear low-density polyethylene is ground in a plastic mill to make linear low-density polyethylene coarse powder. The process parameters are two layers of sieves placed in the sieving device of the m...

Embodiment 3

[0040] 65Kg of high-density polyethylene, 30Kg of alkali-free glass fiber and 5Kg of maleic anhydride grafted polyethylene are manufactured into glass fiber reinforced high-density polyethylene particles in a twin-screw granulator according to the formula ratio. The process parameters are: temperature 150- 200°C, speed 600rpm, head pressure 0.3MPa. Grind the granulated glass fiber reinforced high density polyethylene particles in a plastic mill to make glass fiber reinforced high density polyethylene powder. 65°C. The linear low-density polyethylene is ground in a plastic mill to produce linear low-density polyethylene fine powder. The process parameters are sieve mesh diameter of 600 μm, grinding disc rotation speed of 3800 rpm, and grinding disc outlet temperature of 65°C. The linear low-density polyethylene is ground in a plastic mill to make linear low-density polyethylene coarse powder. The process parameters are two layers of sieves placed in the sieving device of the m...

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Abstract

The invention discloses a polyethylene composite material for a rotationally-molded buried product. The polyethylene composite material is prepared by mixing, by mass, 10-30% of linear low density polyethylene fine powder, 40-80% of glass fiber reinforced high density polyethylene powder and 10-30% of linear low density polyethylene coarse powder. The product machined from the material through the rotational molding technology has the advantages of being high in strength and easy to demold and having smooth inner and outer surfaces.

Description

technical field [0001] The invention relates to a polyethylene composite material, in particular to a polyethylene composite material for rotomolding buried products. Background technique [0002] Rotational molding is a plastic processing method that uses a rotating mold for processing. The processing process is to put plastic powder or slurry into the mold, and the closed mold is rotated or shaken on the equipment, and the mold is heated by an open flame or hot air. External heating, the plastic powder or slurry is turned and flowed inside the mold under the heated state. After the temperature reaches the softening point, it is gradually coated on the inner surface of the mold, melted and condensed. The mold is placed in the natural environment or passed through water, After cooling by media such as fog and wind, the mold is removed and the product is taken out. More than 90% of products in rotational molding are processed with polyethylene powder. Due to the characteris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L51/06C08K7/14B29C47/92B07B1/46B29C48/92
CPCB07B1/4609B29C48/92B29C2948/92514B29C2948/9259B29C2948/92704C08L23/06C08L23/0815C08L2205/025C08L2205/035C08L2207/062C08L51/06C08K7/14
Inventor 温原
Owner ZHEJIANG ROTOUN PLASTIC TECH
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