High-weatherability high-flow glass fiber dipping polyolefin formula and preparation method thereof

Abstract

The invention relates to a high-weatherability high-flow glass fiber dipping polyolefin formula and a preparation method thereof. The high-weatherability high-flow glass fiber dipping polyolefin formula comprises the following components by mass part: 1) 100 parts of polyolefin; 2) 0.5-2 parts of an anti-ultraviolet aging auxiliary agent; 3) 0.5-2 parts of an anti-oxidant; 4) 0.2-2 parts of a flow promoter; 5) 2-10 parts of a flexibilizer; and 6) 1-5 parts of a compatilizer. The components are pre-mixed according to certain proportion, the components are fusion through a double / single screw extruder, then mixed and extruded to a die head for shunting and dipping, and the high-weatherability high-flow glass fiber dipping polyolefin can be prepared. The high-weatherability high-flow glass fiber dipping polyolefin has the advantages that a hyper branched tail end active function group and glass fiber are combined, interface combination capability between polyene resin and glass fiber are enhanced, and the mechanical properties are increased.

Description

technical field [0001] The invention relates to the technical field of plastic manufacturing, in particular to a high weather resistance and high flow glass fiber impregnated polyolefin formula and a preparation method thereof. Background technique [0002] In general-purpose plastics, conventional polyolefins mainly refer to polyethylene and polypropylene. Polyethylene (PE for short) is a thermoplastic resin obtained by polymerizing ethylene monomers, and the industry also includes copolymers of ethylene and a small amount of α-olefins. Polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance, good chemical stability, and can withstand most acid and alkali erosions. It is widely used in films, hollow products, wires and cables, pipes and other fields. Polypropylene (PP) is a kind of thermoplastic resin prepared by polymerizing propylene, including copolymers of propylene and a small amount of ethylene. It is usually a translucent colorl...

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Problems solved by technology

[0004] However, on the one hand, due to the application in some specific fields, long-term exposure to sunlight puts forward higher requirements for anti-ultraviolet performance and thermo-oxidative aging performance. For example, the retention rate of tensile strength properties after 1000h thermo-oxidative aging at Reach more than 80%; on the other hand, the existing polypropylene material has a poor impregnation effect on glass fiber, which directly affects the mechanical properties of the product; through technological improvement, it is possible to degrade polypropylene with peroxide to improve its fluidity. Or add small molecular additives such as lubricants or flow promoters to modify PP and PE. Although the flow properties of polyolefins are improved and the impregnation effect with glass fibers is improved, their mechanical properties are also damaged.

In addition, due to the insufficient viscosity control of polyolefin materials, when it is applied to unidirectional continuous glass fiber reinforced sheets, the thickness of polypropylene sheets on the market can only reach 0.2-0.3mm, and the thickness of polyethylene sheets is mainly 0.25-0.3mm. mm, cannot meet the development needs of lightweight and high performance

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