High-density polyethylene resin for preparing small hollow product with extrusion blow molding

A high-density polyethylene and extrusion blow molding technology, which is used in the field of high-density polyethylene resin for extrusion blow molding of small hollow products, can solve the problems of poor tensile yield stress and environmental stress cracking resistance of HDPE resin, and achieves Effects of excellent performance, increased tensile yield stress, excellent resistance to environmental stress cracking

Inactive Publication Date: 2017-10-24
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor tensile yield stress and environmental stress cracking resistance of HDPE resin in the prior art, and to provide a high-density polyethylene resin for extrusion blow molding small hollow products, which has excellent tensile yield stress and environmental stress cracking resistance

Method used

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  • High-density polyethylene resin for preparing small hollow product with extrusion blow molding
  • High-density polyethylene resin for preparing small hollow product with extrusion blow molding
  • High-density polyethylene resin for preparing small hollow product with extrusion blow molding

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Polymerization process conditions

[0021]

[0022] The composite processing aid in this embodiment is: 0.5wt‰ antioxidant 1010, 0.6wt‰ antioxidant 168, 0.3wt‰ antioxidant DHT, 1.0wt‰ calcium stearate, 0.5wt‰ of erucamide. The temperature of the first zone of the twin-screw extruder is 165°C, the temperature of the second zone is 210°C, the temperature of the third zone is 180°C, and the template temperature is 175°C.

Embodiment 2

[0024] Polymerization process conditions

[0025]

[0026]

[0027] The composite processing aid in this embodiment is: 0.5wt‰ antioxidant 1010, 0.6wt‰ antioxidant 168, 0.3wt‰ antioxidant DHT, 1.0wt‰ zinc stearate, 0.5wt‰ of oleic acid amide. The temperature of the first zone of the twin-screw extruder is 165°C, the temperature of the second zone is 210°C, the temperature of the third zone is 180°C, and the template temperature is 175°C.

Embodiment 3

[0029] Polymerization process conditions

[0030]

[0031] The composite processing aid in this embodiment is: 0.3wt‰ antioxidant 1010, 0.9wt‰ antioxidant 168, 0.5wt‰ antioxidant DHT, 0.6wt‰ calcium stearate, 0.5wt‰ of erucamide. The temperature of the first zone of the twin-screw extruder is 170°C, the temperature of the second zone is 215°C, the temperature of the third zone is 175°C, and the template temperature is 180°C.

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Abstract

The invention relates to high-density polyethylene resin for preparing a small hollow product with extrusion blow molding. A process of connecting two kettles of a Mitsui slurry polymerization device in series is adopted; then a reaction kettle is connected in series; only ethylene is added into the first reaction kettle; ethylene and butene-1 are added into a second reaction kettle and a third reaction kettle; the molecular weight distribution of HDPE (High-Density Polyethylene) is widened further through the polymerization of the third reaction kettle; meanwhile, the content of the butene-1 as a copolymer monomer of a high-molecular weight part is increased in order to meet the requirement on the HDPE for preparing the small hollow product with the extrusion blow molding. The HDPE has superior mechanical performance, can be up to 28MPa in tensile yield strength to the maximum extent, is over 200h in environmental stress cracking resistance, is improved remarkably in toughness, and can be widely applied to molding and processing of the small hollow product.

Description

technical field [0001] The invention relates to a high-density polyethylene resin, in particular to a high-density polyethylene resin for extrusion blow molding small hollow products. Background technique [0002] Due to its high density, high rigidity, good toughness, and good processing performance, high-density polyethylene (HDPE) is often used in the production of milk bottles, juice bottles, cosmetic bottles, medicine bottles, detergents, food containers, industrial bottles, etc. Small hollow containers. HDPE small hollow products mainly include drinking water packaging bottles, cosmetic bottles, detergent bottles, medicine bottles, etc. When choosing raw materials for HDPE small hollow products, two considerations need to be taken into account. The first is the requirements of the product’s performance on the material, including mechanical properties, good strength, stiffness, impact toughness and creep resistance, which can ensure the basic use requirements of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/00C08K5/098C08K5/20C08K5/526C08K5/134C08F210/16C08F210/08C08F2/00B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08F210/16C08F2400/02C08K5/00C08K5/098C08K5/1345C08K5/20C08K5/526C08K2201/014C08L2207/062C08F210/08C08F2500/07C08F2/00C08L23/06Y02P20/52
Inventor 邱敦瑞徐振明傅勇尚小杰
Owner SINOPEC YANGZI PETROCHEM
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