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Polypropylene composite material with high strength and high elongation at break and preparation method thereof

A composite material, polypropylene technology, applied in polypropylene composite materials, polypropylene composite materials with high elongation at break, high strength field, can solve the problem of high ductility, increased material cost, loss of bending resistance, etc. problems, achieve high impact toughness, improve performance, and reduce dosage

Inactive Publication Date: 2013-04-17
SHANGHAI PRET COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the performance requirements of polypropylene materials increase year by year, it is necessary to improve the toughness, especially the tensile ductility, of the material as much as possible under the premise of maintaining sufficient rigidity. The proportion of components can achieve sufficiently high and relatively balanced rigidity and toughness, but it is difficult to increase the ductility characterized by tensile elongation at break, and at the same time, a large amount of rubber elastic body used for toughening loses considerable flexural properties, and greatly improves material cost

Method used

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  • Polypropylene composite material with high strength and high elongation at break and preparation method thereof
  • Polypropylene composite material with high strength and high elongation at break and preparation method thereof
  • Polypropylene composite material with high strength and high elongation at break and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 94.5% of polypropylene, 5% of superfine calcium carbonate, 0.1% of Irganox 1010, 0.1% of Igrafos 168, and 0.3% of Negonox DSTP by weight, and dry mix them in a high-speed mixer for 5 minutes, then add the Melting extrusion granulation in the extruder, where the temperature inside the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, and the speed of the twin-screw extruder is 400 rpm / Minute. After the particles are dried, they are injection molded on an injection molding machine to prepare samples.

Embodiment 2

[0036] Weigh 79.5% of polypropylene, 20% of superfine calcium carbonate, 0.1% of Irganox 1010, 0.1% of Igrafos 168, and 0.3% of Negonox DSTP by weight, and dry mix them in a high-speed mixer for 5 minutes, then add the Melting extrusion granulation in the extruder, where the temperature inside the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, and the speed of the twin-screw extruder is 400 rpm / Minute. After the particles are dried, they are injection molded on an injection molding machine to prepare samples.

Embodiment 3

[0038] Weigh 69.5% of polypropylene, 30% of superfine calcium carbonate, 0.1% of Irganox 1010, 0.1% of Igrafos 168, and 0.3% of Negonox DSTP by weight, dry mix them in a high-speed mixer for 5 minutes, and then add Melting extrusion granulation in the extruder, where the temperature inside the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, and the speed of the twin-screw extruder is 400 rpm / Minute. After the particles are dried, they are injection molded on an injection molding machine to prepare samples.

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Abstract

The invention discloses a polypropylene composite material with high strength and high elongation at break. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 55-94% of polypropylene, 5-40% of ultrafine inorganic filler, 0-20% of elastomeric toughener and 0.1-2% of stabilizer. The polypropylene composite material disclosed by the invention has the following advantages: 1) the ultrafine calcium carbonate spherical filler is used for filling so as to modify the polypropylene material; and then compared with traditional talc powder-modified polypropylene, the polypropylene composite material has obviously higher impact toughness and especially has sufficient anti-bending performance and good rigid-tough balance; 2) the ultrafine calcium carbonate rigid particles are used for toughening the polypropylene material, the using quantity of a rubber elastomer with high price is greatly reduced, and the polypropylene composite material simultaneously has higher rigidity and tensile ductility; and 3) the sectional feeding way is adopted, the ultrafine calcium carbonate filler is added into an extruding machine at the lower stream of a screw rod, the influence of other components during the melting blending process on the ultrafine spherical particles during shearing and dispersion processes can be avoided to the greatest extent, and the performances of the composite material are further improved.

Description

technical field [0001] The invention relates to a polypropylene composite material, specifically a polypropylene composite material with high strength and high elongation at break, and a preparation method thereof, belonging to the field of polymer modification and processing. Background technique [0002] With the rapid development of automobiles and related industries, the demand for various general-purpose plastics and engineering plastics in various industries is increasing day by day, among which polypropylene composite materials account for a large share. At the same time, for polypropylene composite materials used in interior and exterior parts of automobiles, in addition to aesthetics and comfort, higher requirements are put forward for its safety and applicability. Polypropylene materials are required to have high strength, high toughness or ultra-high Toughness, while taking into account high fluidity, low emission, scratch resistance, light resistance and other pr...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L53/00C08L23/08C08K13/02C08K3/26B29C47/92B29B9/06B29C48/92
CPCB29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 张锴张鹰张祥福周文
Owner SHANGHAI PRET COMPOSITES
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