Mixing material of high-density polyethylene, polypropylene and triatomic ethylene-propylene copolymer and preparation method thereof

A technology of EPDM and blends, which is applied in the field of blends of high-density polyethylene, polypropylene and EPDM copolymers, can solve the problems of poor compatibility, poor mechanical properties, and poor bonding force. and other problems, to achieve the effect of high tensile strength, low flow rate and high impact strength

Inactive Publication Date: 2010-01-13
无锡嘉旺精密包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor compatibility of polypropylene and polyethylene, the bonding force between the two phases is poor, the shape is rough, and the mechanical properties of the blend are poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of the blend of polyethylene, polypropylene and ethylene-propylene-diene copolymer adopts the following process steps:

[0015] a. Pour 72 kilograms of high-density polyethylene (i.e. HDPE) granules and 18 kilograms of polypropylene (PP) granules into the high-speed mixer blending of the model SHR-100L produced by Zhangjiagang Vinda Liyuan Machinery Co., Ltd., blending 1 ~3 minutes; the blending speed of the high-speed mixer is controlled at 600~700r / min.

[0016] b. After blending, pass the mixture into the SJ-35 / 40 two-way screw extruder produced by Nanjing Ruiya High Polymer Equipment Co., Ltd. for extrusion and granulation. The screw barrel and screw of the two-way screw extruder The temperature is controlled at 110-190°C, the screw extrusion pressure is controlled at 23-33MPa, and the strip-shaped blend is extruded. The blend is passed into a water tank at 35-40°C for cooling for 1-2 minutes, and then cut to obtain 90 kg of blended primary g...

Embodiment 2

[0020] Embodiment 2: the preparation method of the blend of polyethylene, polypropylene and ethylene-propylene-diene copolymer adopts following process steps:

[0021] a. Pour 82 kilograms of high-density polyethylene (i.e. HDPE) granules and 28 kilograms of polypropylene (PP) granules into the high-speed mixer blending of the model SHR-100L produced by Zhangjiagang Vinda Liyuan Machinery Co., Ltd., and blend for 1 ~3 minutes; the blending speed of the high-speed mixer is controlled at 600~700r / min.

[0022] b. After blending, pass the mixture into the SJ-35 / 40 two-way screw extruder produced by Nanjing Ruiya High Polymer Equipment Co., Ltd. for extrusion and granulation. The screw barrel and screw of the two-way screw extruder The temperature is controlled at 110-190°C, the screw extrusion pressure is controlled at 23-33MPa, and the strip-shaped blend is extruded. The blend is passed into a water tank at 35-40°C for cooling for 1-2 minutes, and then cut to obtain 110 kilogra...

Embodiment 3

[0027] a. Pour 80 kg of high-density polyethylene (i.e. HDPE) granules and 20 kg of polypropylene (PP) granules into the high-speed mixer blending model SHR-100L produced by Zhangjiagang Vinda Liyuan Machinery Co., Ltd., and blend for 1 ~3 minutes; the blending speed of the high-speed mixer is controlled at 600~700r / min.

[0028] b. After blending, pass the mixture into the SJ-35 / 40 two-way screw extruder produced by Nanjing Ruiya High Polymer Equipment Co., Ltd. for extrusion and granulation. The screw barrel and screw of the two-way screw extruder The temperature is controlled at 110-190°C, the screw extrusion pressure is controlled at 23-33MPa, and the strip-shaped blend is extruded. The blend is passed into a water tank at 35-40°C for cooling for 1-2 minutes, and then cut to obtain 100 kilograms of blended primary particles;

[0029] C, 100 kilograms of blending primary granules and 12 kilograms of ethylene-propylene-diene copolymer (being EPDM) are poured into the high-s...

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Abstract

The invention discloses a mixing material of high-density polyethylene, polypropylene and a triatomic ethylene-propylene copolymer and a preparation method thereof. The preparation method adopts the following technological steps: firstly, pouring high-density polyethylene granules and polypropylene granules into a high-speed mixing mill to be mixed together; extruding after mixing to obtain mixed initial granules; and then mixing the mixed initial granules with the triatomic ethylene-propylene copolymer; after the mixing, extruding by a bidirectional screw extruder to obtain strip-shaped mixed material; cooling and cutting the mixing material into mixed granules. The mixing material has high impact strength and tensile strength, low flow rate, and the like; and in addition, the preparation method is simple and easy to operate.

Description

technical field [0001] The invention discloses a blend of high-density polyethylene, polypropylene and ethylene-propylene-diene copolymer, and also discloses a preparation method of the blend of polyethylene, polypropylene and ethylene-propylene-diene copolymer . Background technique [0002] PP, that is, the low-temperature impact strength of general-purpose plastic polypropylene is not good, and technicians in the industry usually add polyethylene to improve the low-temperature impact strength of PP. Due to the poor compatibility of polypropylene and polyethylene, the bonding force between the two phases is poor, the shape is rough, and the mechanical properties of the blend are poor. Studies have proved that the compatibility between the two can be improved by adding a compatibilizer, and the product performance can be improved by obtaining a continuous and stable blend shape. Adding ethylene-propylene-diene copolymer (EPDM) can reduce the interfacial tension of PP / HDPE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/16B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/92514B29C2948/92561B29C2948/92704B29C2948/92895B29C2948/92923
Inventor 明达祥
Owner 无锡嘉旺精密包装材料有限公司
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