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Modified high-density polyethylene hose and composition thereof

A technology of high-density polyethylene and low-density polyethylene, applied in the field of modified high-density polyethylene hose and its composition, agricultural water-saving irrigation system, can solve the problem of high-density polyethylene hardness, difficult processing, Poor flexibility and other problems, to achieve the effect of good modification, excellent processing performance and good compatibility

Pending Publication Date: 2022-03-22
LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides a modified high-density polyethylene hose and its composition. The phenomenon of splitting and bursting tubes can improve the shortcomings of high-density polyethylene, such as high hardness, poor flexibility, and difficult processing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh by weight: 60 parts of high-density polyethylene, density 0.942g / cm 3 , the melt flow index is 12g / 10min; m-linear low-density polyethylene 10 parts, the density is 0.921g / cm 3 , the melt flow index is 6g / 10min; 20 parts of low-density polyethylene, the density is 0.920g / cm 3 , melt flow index is 15g / 10min; polypropylene 10 parts, density is 0.870g / cm 3 , the melt flow index is 30g / 10min; 5 parts of ethylene-vinyl acetate copolymer, the density is 0.928g / cm 3 ; 5 parts of hyperbranched polyester; 3 parts of copolymer of polar monomer maleic anhydride grafted linear low density polyethylene, melt flow index is 12g / 10min; 4,4′-thiobis(2-methyl -6-tert-butylphenol) 0.2 parts; carbon black 2 parts. First, add the weighed components into a high-speed mixer and mix evenly. The mixing time is 12 minutes, and the rotation speed is 155 rpm. Then put the mixed material into the hose extruder, the body temperature is 165-200°C, after extrusion, cooling and shaping, the m...

Embodiment 2

[0030] The difference between embodiment 2 and embodiment 1 is: take by weight: 65 parts of high density polyethylene, density is 0.946g / cm 3 , the melt flow index is 11g / 10min; m-linear low-density polyethylene 15 parts, the density is 0.920g / cm 3 , the melt flow index is 6g / 10min; 25 parts of low-density polyethylene, the density is 0.922g / cm 3 , melt flow index is 15g / 10min; polypropylene 15 parts, density is 0.870g / cm 3 , the melt flow index is 30g / 10min; 5 parts of ethylene-vinyl acetate copolymer, the density is 0.928g / cm 3 ; 5 parts of hyperbranched polyester; 6 parts of copolymer of polar monomer maleic anhydride grafted polypropylene, melt flow index is 14g / 10min; 4,4′-thiobis(2-methyl-6-tert butylphenol) 0.2 parts; carbon black 1 part. The obtained hose has stable extrusion, smooth surface and 19.4% higher burst pressure than ordinary hoses.

Embodiment 3

[0032] The difference between embodiment 3 and embodiment 1 is: take by weight 98 parts of high density polyethylene, density is 0.970g / cm 3 , the melt flow index is 0.5g / 10min; m-linear low-density polyethylene 5 parts, the density is 0.922g / cm 3 , the melt flow index is 0.1g / 10min; 10 parts of low-density polyethylene, the density is 0.910g / cm 3 , melt flow index is 30g / 10min; polypropylene 0.5 parts, density is 0.910g / cm 3 , the melt flow index is 0.5g / 10min; 10 parts of ethylene-vinyl acetate copolymer, the density is 0.938g / cm 3 ; 10 parts of hyperbranched polyamide ester; 6 parts of copolymer of polar monomer maleic anhydride grafted low density polyethylene, melt flow index is 50g / 10min; 1,3,5-trimethyl-2,4 , 0.1 parts of 6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; 5 parts of carbon black. The obtained hose has stable extrusion, smooth surface and 19.8% higher burst pressure than ordinary hoses.

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Abstract

The invention discloses a modified high-density polyethylene hose which comprises the following components: high-density polyethylene, m-linear low-density polyethylene, low-density polyethylene, polypropylene, an ethylene-vinyl acetate copolymer, a hyperbranched polymer, a compatilizer, an antioxidant and a coloring agent, and the components are mixed according to a certain weight part ratio; the preparation method comprises the following steps: mixing the raw materials in a mixer, uniformly mixing the raw materials, putting the mixture in an extruder, carrying out extrusion molding at a certain temperature, and carrying out cooling qualitative treatment to obtain the modified high-density polyethylene hose product. The modified high-density polyethylene hose provided by the invention is good in modification, excellent in processability, good in compatibility, high in mechanical strength and glossy in surface, and can be widely applied to a farmland water-saving irrigation system. The invention further discloses a composition obtained by combining the components.

Description

technical field [0001] The invention belongs to the technical field of pipe materials, in particular to a modified high-density polyethylene hose and its composition, which are mainly used in agricultural water-saving irrigation systems. Background technique [0002] The existing formula for producing ordinary polyethylene hose is to use one or more of high-density polyethylene, low-density polyethylene, linear low-density polyethylene or medium-density polyethylene to mix with polypropylene in a certain proportion, and add an appropriate amount Additives are melt-extruded to produce hoses. Since the molecular structures of high-density polyethylene, low-density polyethylene, linear low-density polyethylene, medium-density polyethylene and polypropylene are not exactly the same, their properties are also quite different. High-density polyethylene has less branched chains than low-density polyethylene, high crystallinity, high rigidity and excellent mechanical properties, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/12C08L67/00C08L51/06
CPCC08L23/06C08L2203/18C08L2205/025C08L23/0815C08L23/0853C08L23/12C08L67/00C08L51/06
Inventor 王俊程张友新霍福磊
Owner LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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