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High-rigidity, low-shrinkage and good-appearance polypropylene composite material and preparation method thereof

A composite material and low-shrinkage technology, which is applied in the field of polypropylene composite materials and modified polypropylene materials, can solve the problems of great loss of material toughness and inability to apply visible parts, etc., and achieve low shrinkage, good appearance, and comprehensive good mechanical properties

Inactive Publication Date: 2016-05-25
SHANGHAI PRET COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantages are also obvious. First of all, traditional glass fiber reinforced materials have a great loss of material toughness. In addition, appearance defects such as exposed glass fibers also make this type of material almost impossible to apply to any visible parts.

Method used

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  • High-rigidity, low-shrinkage and good-appearance polypropylene composite material and preparation method thereof
  • High-rigidity, low-shrinkage and good-appearance polypropylene composite material and preparation method thereof
  • High-rigidity, low-shrinkage and good-appearance polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 69.5% of polypropylene, 1% of high-performance inorganic filler, 19% of talc, 10% of elastomer, 0.1% of Irganox1010, 0.1% of Igrafos168, and 0.3% of NegonoxDSTP in a high-speed mixer. Minutes, then add to the twin-screw extruder to melt and extrude to granulate. 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, twin-screw The extruder rotational speed was 400 rpm. After the particles are dried, they are injection molded on an injection molding machine to prepare samples.

Embodiment 2

[0034] Weigh 69.5% of polypropylene, 3% of high-performance inorganic filler, 17% of talcum powder, 10% of elastomer, 0.1% of Irganox1010, 0.1% of Igrafos168, and 0.3% of NegonoxDSTP by weight, and dry mix them in a high-speed mixer for 5 Minutes, then add to the twin-screw extruder to melt and extrude to granulate. 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, twin-screw The extruder rotational speed was 400 rpm. After the particles are dried, they are injection molded on an injection molding machine to prepare samples.

Embodiment 3

[0036] Weigh 69.5% of polypropylene, 5% of high-performance inorganic filler, 15% of talcum powder, 10% of elastomer, 0.1% of Irganox1010, 0.1% of Igrafos168, and 0.3% of NegonoxDSTP in a high-speed mixer. Minutes, then add to the twin-screw extruder to melt and extrude to granulate. 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, twin-screw The extruder rotational speed was 400 rpm. 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 high-rigidity, low-shrinkage and good-appearance polypropylene composite material and a preparation method of the high-rigidity, low-shrinkage and good-appearance polypropylene composite material. The high-rigidity, low-shrinkage and good-appearance polypropylene composite material is prepared from the following raw materials in percentage by weight: 55 to 78 percent of polypropylene, 1 to 5 percent of high-performance inorganic filler, 15 to 25 percent of talcum powder, 5 to 15 percent of elastomer toughening agent, 0.1 to 2 percent of stabilizing agent and 0 to 5 percent of other additives. The high-rigidity, low-shrinkage and good-appearance polypropylene composite material and the preparation method, disclosed by the invention, have the advantages that 1, through the synergistic effect of the high-performance inorganic filler and the traditional talcum powder filler, the polypropylene composite material which is higher in rigidity and lower in shrinkage is obtained; 2, through a technological method of adding the high-performance inorganic filler from a side feeding opening, the polypropylene composite material which is better in comprehensive mechanical performance and lower in shrinkage is obtained; 3, compared with the disadvantages of a traditional short glass fiber modified material that glass fiber appearance is easy to appear and the like, the high-rigidity, low-shrinkage and good-appearance polypropylene composite material disclosed by the invention still has a good appearance which is equally matched with that of a traditional talcum powder modified polypropylene material, meanwhile, the high-rigidity, low-shrinkage and good-appearance polypropylene composite material is higher in rigidity and lower in shrinkage and is very suitable for appearance injection-molding parts which have higher requirements on rigidity and size stability.

Description

technical field [0001] The invention relates to a modified polypropylene material, specifically a polypropylene composite material with high rigidity, low shrinkage and good appearance, and a preparation method thereof; it belongs to the field of polymer modification and processing. Background technique [0002] With the rapid development of the automobile industry and the increasingly severe energy problems, major automobile factories have conducted a lot of research and attempts in the field of replacing steel with plastic and lightweighting. More and more metal parts are replaced by reinforced plastics, effectively The weight reduction of the whole vehicle has been realized, but at the same time, due to the huge difference between metal materials and plastic materials and the strict requirements of automobile safety, higher requirements are put forward for component design and material rigidity. [0003] For the polypropylene material with the largest demand for automotiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L23/08C08K13/04C08K7/14C08K3/34C08K5/134C08K5/526C08K5/372B29C47/92B29C48/92
CPCC08L53/00B29C48/92B29C2948/9259B29C2948/92704C08K2201/003C08K2201/004C08L23/0815C08K13/04C08K7/14C08K3/34C08K5/1345C08K5/526C08K5/372
Inventor 张锴张鹰张祥福周文
Owner SHANGHAI PRET COMPOSITES
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