High-performance modified polypropylene and processing method for two-way stretch geogrid special material

A technology of geogrid and biaxial stretching, which is applied in the field of processing special materials for biaxially stretched geogrid

Inactive Publication Date: 2014-04-16
NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, through the change of additive formula, changing its crystalline form can properly change the characteristics of the base material (such as MFR, isotacticity, molecular weight distribution, etc.), but in the optimization data of raw material ratio of geogrid and polypropylene nucleating agent There are few reports on modification research

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  • High-performance modified polypropylene and processing method for two-way stretch geogrid special material
  • High-performance modified polypropylene and processing method for two-way stretch geogrid special material

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Embodiment Construction

[0018] The present invention selects a self-made modifier, and with different additions, in ordinary polypropylene, synthetic antioxidants, arylamide nucleating agents (self-made nucleating agents) and other series of compounds, by mass ratio 100%: 0.2 %—1.0%: 0.03%—0.05%: 0.05%—0.15% After mixing evenly, the blend is added to a twin-screw extruder that has been heated to 200-230°C, with a screw speed of 60-600 rpm and a heating temperature of It is melt-extruded at 180-230°C to obtain modified polypropylene. After several experiments, the analysis and measurement results show that the modified polypropylene can not only greatly increase the normal temperature impact strength of the base resin, maintain the tensile yield strength, and reduce the tensile yield deformation. Moreover, if the yield tensile strength is not less than 30MPa, the yield strain is less than 9%, and the impact strength is increased by 50%, it is considered effective for modification, and it can be used a...

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Abstract

The invention discloses high-performance polypropylene prepared from methods of self-producing a nucleating agent and synthesizing an antioxidant. The high-performance polypropylene is used for processing a two-way stretch geogrid special material; a beta crystalline hexagonal honeycomb-shaped stable product is produced through a double-screw extruder under process conditions of a preset rotating speed, temperature and the like, and the product is excellent in performances including stable tensile strength, high compressive strength, high yield extensibility and the like. The method disclosed by the invention optimizes raw material proportion, so that the prepared grid special material is completely consistent with or better than national and industrial standards and shows strong economy and practicability.

Description

technical field [0001] The invention relates to a modification of polypropylene and a processing method for special materials for geogrids, in particular to the self-made nucleating agent, the synthesis of antioxidants, and the processing method for special materials for biaxially stretched geogrids. Background technique [0002] Plastic geogrid is a high-strength geotechnical material made of polypropylene, polyethylene or other high molecular polymers, added with relevant modifiers, and then stretched longitudinally and transversely. In particular, the biaxially stretched geogrid has strong tensile strength in the longitudinal and transverse directions, and is widely used in engineering fields such as water conservancy, highways, railways, coal mines, and construction. [0003] Since polypropylene accounts for more than 60% of plastic geogrid raw materials, and the growth and rapid development of the domestic geosynthetics market, users have increasingly stringent requirem...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/04C08K5/20B29C69/02B29C47/92B29C48/92
CPCB29C48/0018C08K5/20C08K9/04C08L2205/24C08L23/12B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 韩彩琴马进马利海杨惠琳余鹏
Owner NINGXIA BAOTA PETROCHEM SCI & TECH IND DEV
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