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Spraying-free polypropylene composite material

A composite material, polypropylene technology, applied in the field of polypropylene materials, can solve the problems of material metallic luster, unsatisfactory color, molding fluidity, etc., to achieve improved metallic luster and mechanical properties, good dispersion and contact, and good metallic luster Effect

Inactive Publication Date: 2019-07-09
SUZHOU RUNJIA ENGINEER PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although spray-free parts have great advantages compared with painted parts, there are still many problems to be overcome in our country's spray-free technology: such as the problem of material metal gloss and unsatisfactory color; material forming fluidity, weld line, flow Appearance problems such as scratches

Method used

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  • Spraying-free polypropylene composite material
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  • Spraying-free polypropylene composite material

Examples

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Effect test

Embodiment 1

[0024] The invention provides a spray-free polypropylene composite material, and the composition of raw materials for preparing the material is shown in Table 1.

[0025] Wherein: the flow rate of the polypropylene resin under a load of 2.16kg is 50-65g / min at a temperature of 230°C.

[0026] Aluminum materials include flake aluminum and spherical aluminum; through the combined use of different shapes of aluminum powder, the reflection and diffuse reflection effects are improved, and the metallic luster of the material is improved; the length of the flake aluminum and the diameter of the spherical aluminum Both are between 5-25μm; aluminum materials are coated and modified with wax to improve compatibility with polypropylene matrix; the wax is polyethylene wax with a molecular weight of 3000-5000.

[0027] The modified powder material is a mixed powder of talcum powder and titanium dioxide coated with epoxy resin, wherein the mass ratio of talc powder and titanium dioxide is 9...

Embodiment 2

[0039] Compared with Embodiment 1, this embodiment differs in that:

[0040] (1) The composition of raw materials for preparing spray-free polypropylene composite materials is different, see Table 1 for details.

[0041] (2) In step (1) of the preparation method: heat the polyethylene wax to 100°C to melt it, then add the aluminum material to the polyethylene wax; the mass ratio of polyethylene wax to aluminum material is 8:1; stir and sonicate 50min (stirring speed is 200rpm), so that the aluminum material is uniformly dispersed in the molten polyethylene wax; after that, it is cooled and solidified to obtain a modified aluminum material.

Embodiment 3

[0043] (1) The composition of raw materials for preparing spray-free polypropylene composite materials is different, see Table 1 for details.

[0044] (2) In step (1) of the preparation method: heat the polyethylene wax to 115°C to melt it, then add the aluminum material to the polyethylene wax; the mass ratio of polyethylene wax to aluminum material is 6.5:1; stir and sonicate 30min (the stirring speed is 500rpm), so that the aluminum material is uniformly dispersed in the molten polyethylene wax; after that, it is cooled and solidified to obtain a modified aluminum material.

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Abstract

The invention relates to a spraying-free polypropylene composite material. The spraying-free polypropylene composite material is prepared by using a method comprising the steps: modifying an aluminummaterial by using polyethylene wax, performing uniform mixing on raw materials, performing melting and extrusion, performing cooling by using circulating water, and performing granulation so as to obtain a finished product, wherein the aluminum material includes sheet-like aluminum and spherical aluminum. Through combined use of the aluminum powder of a sheet shape, a spherical shape and other shapes, the metallic luster of the material is improved, and the material is provided with better and more beautiful color; and meanwhile, surface treatment is performed on the aluminum material by usingthe polyethylene wax, so that the aluminum material has better dispersion in the polypropylene material and better contact with the polypropylene material, and the metallic luster and mechanical properties of the material are improved. In addition, the surface of a prepared component has no air marks, flow marks and weld bonds, and the problem of material delamination is solved.

Description

technical field [0001] The invention relates to the field of polypropylene materials, in particular to a spray-free polypropylene composite material. Background technique [0002] With the continuous development of the automobile industry, the application of new materials and new technologies provides new ideas for the development of parts. Automobile interior and exterior plastic products are usually sprayed with paint, which not only has a complicated process, but also causes great pollution to the environment. Spray-free materials are materials that add metal powder to plastic raw materials, and direct injection molding can make the product appear spray-painted. Today, some interior and exterior paint-free parts have gradually replaced painted parts and entered the market. The application of spray-free materials simplifies the molding process of automotive interior and exterior parts to a certain extent, improves product competitiveness, and is beneficial to the develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/08C08K13/06C08K9/10C08K3/34C08K3/22C08K9/04C08K7/00C08K3/08C08K7/18
CPCC08L23/12C08L2205/035C08K2003/2241C08K2003/0812C08L23/14C08L23/0815C08K13/06C08K9/10C08K3/34C08K3/22C08K9/04C08K7/00C08K3/08C08K7/18
Inventor 汪理文周明李庆贵牛国增翁永华
Owner SUZHOU RUNJIA ENGINEER PLASTIC
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