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A kind of high carbon black dispersion polyethylene granular material and preparation method thereof

A technology of dispersity and polyethylene, which is applied in the field of high carbon black dispersity polyethylene pellets and its preparation, can solve the problems of the use strength and service life of polyethylene pipes, and achieve the effect of improving the dispersity.

Active Publication Date: 2018-05-15
中广核拓普(四川)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the color masterbatch is improperly selected or dispersed unevenly, it will have a serious impact on the service strength and life of polyethylene pipes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] A preparation method of high carbon black dispersion polyethylene pellets, characterized in that it comprises the following steps,

[0037] S1: All raw materials are dried in vacuum at low temperature, and the drying time is not less than 24 hours;

[0038] S2: Put the black color masterbatch, polyethylene resin pellets and polyethylene wax with the same weight as the black color masterbatch in a high-speed mixer, then pre-mix at low speed, and then mix at high speed. The total mixing time is 3~5min;

[0039] S3: Put the mixture of black color masterbatch, polyethylene resin pellets and polyethylene wax uniformly mixed in the previous step in the hopper of the twin-screw extruder, and carry out twin-screw melt extrusion granulation, the melting temperature is 150~210 ℃ to prepare the pre-dispersed color masterbatch, and then use low-temperature vacuum drying to treat the pre-dispersed color masterbatch, and the drying time is not less than 24h;

[0040] S4: Put the pre...

Embodiment 2

[0044] A kind of high carbon black dispersion polyethylene granular material is characterized in that being made of the raw material of following parts by weight,

[0045] 50 parts of low-density polyethylene resin pellets,

[0046] 50 parts of high-density polyethylene resin pellets,

[0047] Polyethylene wax 0.5 part,

[0048] Antioxidant 1010 0.5 parts,

[0049] Antioxidant 168 0.5 parts

[0050] 10 parts of black color masterbatch.

[0051] Medium and low structure carbon black is used in the black color masterbatch, and the carbon black content is 40%.

[0052] The preparation method is the same as in Example 1. The carbon black dispersion of the high carbon black dispersion polyethylene pellets prepared by the above preparation method is 6 points, the tensile strength is 21.0MPa, the elongation at break is 700%, and the density is 0.951g / cm 3 , melt flow index 1.0g / 10min, carbon black content 2.8%, oxidation induction period 54min.

Embodiment 3

[0054] A kind of high carbon black dispersion polyethylene granular material is characterized in that being made of the raw material of following parts by weight,

[0055] 50 parts of low-density polyethylene resin pellets,

[0056] 50 parts of high-density polyethylene resin pellets,

[0057] Polyethylene wax 0.3 part,

[0058] Antioxidant 1010 0.15 parts,

[0059] Antioxidant 168 0.15 parts

[0060] Black color masterbatch 6 parts.

[0061] Medium and low structure carbon black is used in the black color masterbatch, and the carbon black content is 40%.

[0062] The preparation method is the same as in Example 1. The carbon black dispersion of the high carbon black dispersion polyethylene pellets prepared by the above preparation method is 7 points, the tensile strength is 19.6MPa, the elongation at break is 750%, and the density is 0.945g / cm 3 , melt flow index 1.0g / 10min, carbon black content 2.6%, oxidation induction period 87min.

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Abstract

The invention discloses high carbon black dispersity polyethylene aggregates which are characterized by being prepared from, by weight parts, 100 parts of polyethylene resin aggregates, 0.2-0.5 part of polyethylene wax, 0.2-0.5 part of complex antioxidant and 2-10 parts of black masterbatch. Medium and low structure carbon black is adopted in the black masterbatch, and the content of carbon black is 40%. The invention further provides a method for preparing the high carbon black dispersity polyethylene aggregates. A strong force shearing effect of a twin-screw extruder is adopted to manufacture pre-dispersed color masterbatch, the pre-dispersed color masterbatch and the polyethylene resin aggregates undergo blending and extrusion through a single screw extruder, and the dispersity of the carbon black is improved and can reach 6 or over.

Description

technical field [0001] The invention relates to the technical field of preparation of polyethylene pellets, in particular to a polyethylene pellet with high carbon black dispersion and a preparation method thereof. Background technique [0002] There are two ways to prepare black polyethylene pipes in the prior art: the first is to use mixed ingredients, which are based on polyethylene base resin to add necessary antioxidants, ultraviolet stabilizers and pigments. The stabilizer system and the pigment are added together to ensure the uniformity of the fraction, but the cost is relatively high; the second is to use the primary color material and the color masterbatch to produce polyethylene pipes. It is necessary to ensure that the color masterbatch is evenly dispersed, and carbon black is selected The special color masterbatch for polyethylene pipes with content that meets the requirements, preferably the color masterbatch prepared with the same grade of masterbatch. If the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K13/02C08K3/04C08K5/134C08K5/526C08J3/22
CPCC08J3/223C08J3/226C08J2323/06C08J2423/06C08L23/06C08L2203/18C08L2205/025C08L2205/03C08L2207/062C08L2207/066C08K13/02C08K3/04C08K5/1345C08K5/526
Inventor 曾诚邓连天
Owner 中广核拓普(四川)新材料有限公司