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A kind of polypropylene composite material and preparation method thereof

A technology of composite materials and polypropylene, which is applied in the field of polypropylene composite materials and its preparation, can solve problems such as lack of effect, achieve smoother surface, avoid warping and floating fibers, and smooth surface

Active Publication Date: 2021-06-04
柏力开米复合塑料(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned materials still use glass fibers as fillers, which cannot completely avoid the problem of floating fibers.
[0005] Talc powder filled PP can reduce the material cost, improve the dimensional stability and rigidity of the material at the same time, and avoid the problem of floating fibers, but the effect is far less than that of glass fiber reinforced PP
For example, the flexural modulus of 20wt% glass fiber reinforced PP can reach about 4000MPa, while the flexural strength of 20wt% talcum powder filled PP can only reach 1500-2000MPa

Method used

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  • A kind of polypropylene composite material and preparation method thereof
  • A kind of polypropylene composite material and preparation method thereof
  • A kind of polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment provides a polypropylene composite material, comprising the following components in parts by weight:

[0054]

[0055] Among them, the isotacticity of homopolypropylene is 98.5%, the melt index is 12g / 10min, the melt index of styrene-acrylonitrile copolymer is 2.9g / 10min, the mesh number of talcum powder is 3000 mesh, and the nano calcium carbonate The particle size is 20-50nm.

[0056] The preparation method of above-mentioned polypropylene composite material is as follows:

[0057] (1) According to the formula, add other components except talcum powder into the high-speed mixer, and mix for 15 minutes at a rotating speed of 200r / min to obtain a mixed material;

[0058] (2) The mixed material obtained in step (1) is added from the main feeding port of the twin-screw extruder, and the talcum powder is added from the side feeding port of the twin-screw extruder, and the extrusion section of the twin-screw extruder includes There are 11 zones, the scr...

Embodiment 2

[0061] This embodiment provides a polypropylene composite material, comprising the following components in parts by weight:

[0062]

[0063] Among them, the isotacticity of homopolypropylene is 99.2%, the melt index is 7.6g / 10min, the melt index of styrene-acrylonitrile copolymer is 4.5g / 10min, the mesh number of talcum powder is 3500 mesh, nanometer calcium carbonate The particle size is 65-100nm.

[0064] The preparation method of above-mentioned polypropylene composite material is as follows:

[0065] (1) According to the formula, add other components except talcum powder into the high-speed mixer, and mix for 10 minutes at a speed of 500r / min to obtain a mixed material;

[0066] (2) The mixed material obtained in step (1) is added from the main feeding port of the twin-screw extruder, and the talcum powder is added from the side feeding port of the twin-screw extruder, and the extrusion section of the twin-screw extruder includes There are 11 zones, the screw speed o...

Embodiment 3

[0069] This embodiment provides a polypropylene composite material, comprising the following components in parts by weight:

[0070]

[0071] Among them, the isotacticity of homopolypropylene is 98.5%, the melt index is 12g / 10min, the melt index of styrene-acrylonitrile copolymer is 2.9g / 10min, the mesh number of talcum powder is 5000 mesh, the nanometer calcium carbonate The particle size is 20-50nm.

[0072] The preparation method of above-mentioned polypropylene composite material is as follows:

[0073] (1) According to the formula, add other components except talcum powder into the high-speed mixer, and mix at a speed of 300r / min for 20min to obtain a mixed material;

[0074] (2) The mixed material obtained in step (1) is added from the main feeding port of the twin-screw extruder, and the talcum powder is added from the side feeding port of the twin-screw extruder, and the extrusion section of the twin-screw extruder includes There are 11 zones, the screw speed of t...

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Abstract

The invention provides a polypropylene composite material and a preparation method thereof. The polypropylene composite material comprises the following components in weight percentage: 50-80% of polypropylene, 5-10% of styrene-acrylonitrile copolymer, 10-40% of talcum powder, 0.1-0.5% of nucleating agent, coupling agent 0.2‑0.8% and crosslinker 0.1‑0.5%. The polypropylene composite material is prepared by first mixing other components except talcum powder in a high-speed mixer, then extruding through an extruder, and finally radiating cross-linking. The polypropylene composite material provided by the invention has high strength and rigidity, smooth surface, no warping and floating fiber problems, and is suitable for occasions with high requirements on material appearance and rigidity.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) has the advantages of low density, excellent mechanical properties and chemical resistance, and high cost performance. It is currently the most widely used commercial polymer material and is widely used in automobiles, electrical industries and other industries. However, in practical applications, the mechanical properties of pure polypropylene materials cannot meet the requirements and need to be modified. [0003] At present, the most commonly used method of PP modification is blending with inorganic fillers (such as glass fiber, talcum powder, etc.). Among them, glass fiber can greatly improve the strength, rigidity and heat resistance of PP, and its reinforcing effect on PP is much higher than that of other inorganic fillers. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L25/12C08K3/34C08K3/26C08K5/3492C08K13/02
CPCC08K2003/265C08K2201/011C08L23/12C08L25/12C08K3/34C08K3/26C08K5/34924C08K13/02
Inventor 朱成军
Owner 柏力开米复合塑料(昆山)有限公司