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High-density polyethylene alloy pipe and manufacturing method thereof

A technology of high-density polyethylene and low-density polyethylene, which is applied in the field of high-density polyethylene alloy pipes and its manufacturing, can solve poor performances such as wear resistance, chemical resistance, environmental stress cracking resistance and heat resistance. , Insufficient barrier properties of hydrocarbon solvents and fuel oil, affecting the service life of the product, etc., to achieve the effects of easy popularization, enhanced compatibility, and improved barrier properties

Inactive Publication Date: 2011-05-04
HUNAN ZHENHUI PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low softening temperature of polyethylene, the melting point of HDPE is 130 ° C, and the melting point of LDPE is slightly higher than 100 ° C, low tensile strength, poor rigidity, wear resistance, chemical resistance, environmental stress cracking resistance and heat resistance and other properties Poor, insufficient barrier to hydrocarbon solvents and fuel oil, easily damaged by ultraviolet rays under sunlight, seriously affecting the service life of the product

Method used

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  • High-density polyethylene alloy pipe and manufacturing method thereof
  • High-density polyethylene alloy pipe and manufacturing method thereof
  • High-density polyethylene alloy pipe and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] ① Formulation: HDPE 75%, LDPE 10%, HDPE-g-MAH 3%, CaCO 3 10%, antioxidant 0.4%, auxiliary antioxidant 0.4%, ultraviolet absorber 0.4%, dispersant 0.4%.

[0072] ②Process: Accurately weigh the weight of various materials according to the above formula, and press image 3 Process parameters for extrusion granulation.

[0073] ③Injection molding performance testing spline

[0074] Injection molding process parameters: baking material temperature: 85°C, injection temperature: 190°C in zone 1, 210°C in zone 2, 220°C in zone 3; injection pressure: 80MPa in zone 1, 40MPa in zone 2, 15MPa in zone 3, injection time 15S, The holding time is 10S, and the cooling time is 15S.

[0075] ④ For performance analysis see Figure 4 .

Embodiment 2

[0077] ① Formulation: HDPE 73%, LDPE 10%, HDPE-g-MAH 5%, CaCO 3 10%, antioxidant 0.4%, auxiliary antioxidant 0.4%, ultraviolet absorber 0.4%, dispersant 0.4%.

[0078] ② Carry out extrusion granulation and injection molding performance testing sample according to the process parameters of Example 1.

[0079] ③For performance test results, see Figure 5 .

Embodiment 3

[0081] ① Formulation: HDPE 71%, LDPE 10%, HDPE-g-MAH 7%, CaCO 3 10%, antioxidant 0.3%, auxiliary antioxidant 0.3%, ultraviolet absorber 0.3%, dispersant 0.3%.

[0082] ②According to the process parameters of Example 1, extrude the material and test the injection molding performance of the sample strip.

[0083] ③For performance test results, see Figure 6 .

[0084] ④ Performance Analysis

[0085] Using polymer interfacial compatibilizer HDPE-g-MAH for PE / CaCO 3 The filling system has obvious compatibilizing effect. When the interfacial compatibilizer HDPE-g-MAH is added to the system, the impact performance changes greatly. The reason is that the interfacial compatibilizer HDPE-g-MAH plays a central role in it. As an interface modifying substance, it mainly plays three roles in the system: one is the coupling effect, HDPE-g-MAH is a polar polymer material, and its polar groups can interact with the surface of inorganic fillers rich in The "carboxyl terminal group" has a...

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Abstract

The invention discloses a high-density polyethylene alloy pipe and a manufacturing method thereof. High-density polyethylene 100 (HDPE 100) is used as base resin, high-density polyethylene-g-maleic anhydride (HDPE-g-MAH) is used as a compatilizer, calcium carbonate (CaCO3) and low-density polyethylene (LDPE) are added into the base resin and the compatilizer, and the mixture is blended with modifier polyamide 6 (PA6) to form a modified polyethylene (PE) alloy product. The method comprises the main operation steps of: (I) preparing HDPE modified granules; and (II) adding the modifier PA6, performing high-speed mixing to form a modified PE mixture, and extruding the modified PE mixture into the product in an extruder. According to the technical scheme, the high-density polyethylene alloy pipe overcomes the defects the defects that the conventional polyethylene resin has low tensile strength, poor rigidity and poor abrasion resistance, chemical resistance, environmental stress cracking resistance and heat resistance, has insufficient blocking property on hydrocarbon solvents and fuel oil, is easily damaged by ultraviolet under the irradiation of sunlight, seriously affects the service life of the product and the like; and the high-density polyethylene alloy pipe is suitable to be used as various heat resistant, abrasion resistant and temperature resistant pipes, and is particularly suitable for pipeline transportation of special industries of drainage, fuel gas and fuel oil delivery, chemistry and chemical industry and the like.

Description

technical field [0001] The invention relates to a high-density polyethylene alloy pipe and a manufacturing method thereof. Background technique [0002] Existing polyethylene resins are widely used in the production of water supply pipes and gas pipes due to their low density, low embrittlement temperature, good toughness, good corrosion resistance and insulation performance, and easy construction and installation, and their development is rapid. However, due to the low softening temperature of polyethylene, the melting point of HDPE is 130 ° C, and the melting point of LDPE is slightly higher than 100 ° C, low tensile strength, poor rigidity, wear resistance, chemical resistance, environmental stress cracking resistance and heat resistance and other properties Poor, insufficient barrier to hydrocarbon solvents and fuel oil, easy to be damaged by ultraviolet rays under sunlight, seriously affecting the service life of the product. Contents of the invention [0003] In vie...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L51/06C08L77/02C08K3/26B29B9/06B29C47/00F16L9/12
Inventor 龙柳媛肖和飞罗安民
Owner HUNAN ZHENHUI PIPE IND
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