Low-gloss and good-appearance polypropylene composite material for automotive interiors and preparation method thereof

A technology for composite materials and automotive interiors, applied in the field of polymer modification, can solve the problems of reducing the gloss of polypropylene materials, strong light reflection, and surface gloss reduction, so as to improve surface roughness, enhance diffuse reflection, reduce The effect of gloss

Active Publication Date: 2020-04-03
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the gloss of automotive interior parts is too high, it will easily produce strong light reflection, which will affect the driving safety and riding comfort of the driver.
[0003] In order to meet the market demand, the traditional technology has continuously optimized the raw material formula and preparation method of polypropylene materials: for example, the component polyethylene of a polypropylene blend material undergoes a cross-linking reaction during the extrusion process, and the cross-linked polyethylene acts as a microcoagulation The glue forms a rough surface on the surface of the material, and the diffuse reflection of the irradiated light forms a matting effect; in this technical solution, the crosslinking reaction of polyethylene is not easy to control, and the matte effect of the prepared composite material is unstable, which may easily lead to appearance defects; in addition, the technical solution is universal The compatibility is not strong, and the cross-linking reaction in the extrusion process to obtain composite materials has higher requirements for equipment and operators
Another example is a polypropylene blended modified material with reduced surface gloss. In this technical solution, the gloss of the polypropylene material is reduced by filling with inorganic substances. The degree of improvement in the gloss of the polypropylene material obtained by this technical solution is limited, and damage Balance of mechanical properties of materials
Therefore, traditional polypropylene composite materials still have the defects of poor gloss and appearance, and are not suitable for automotive interior parts

Method used

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  • Low-gloss and good-appearance polypropylene composite material for automotive interiors and preparation method thereof
  • Low-gloss and good-appearance polypropylene composite material for automotive interiors and preparation method thereof
  • Low-gloss and good-appearance polypropylene composite material for automotive interiors and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a low-gloss, good-looking polypropylene composite material for automotive interiors (see Table 1 for the raw material formula) and a preparation method thereof.

[0037] The preparation method is as follows:

[0038] (1) 30 parts of HDPE powder and 3 parts of diethylpropylbenzene peroxide are mixed evenly, added to the side feeding tank, 70 parts of HDPE main feed is added, the extrusion temperature is set at 160 ° C, and the extrusion reaction is carried out to prepare the dumb Optical masterbatch 1;

[0039] (2) Take the material according to the formulas of the embodiments and comparative examples in Table 1, and use high-speed mixing in a high-speed mixer for 4 to 8 minutes; the uniformly mixed mixture is extruded and granulated by a twin-screw extruder; each section of the extruder is set The temperature is 180°C, the screw speed is 450r / min, and the vacuum degree is greater than 0.06MPa.

Embodiment 2

[0041] This embodiment provides a low-gloss, good-looking polypropylene composite material for automotive interiors (see Table 1 for the raw material formula) and a preparation method thereof.

[0042] The preparation method is as follows:

[0043] (1) 20 parts of HDPE powder and 0.5 parts of diethylpropylbenzene peroxide are mixed evenly, added to the side feeding tank, 80 parts of HDPE main feed is added, the extrusion temperature is set at 170 ° C, and the extrusion reaction is carried out to prepare a dumb Optical masterbatch 1;

[0044] (2) Take the material according to the formulas of the embodiments and comparative examples in Table 1, and use high-speed mixing in a high-speed mixer for 4 to 8 minutes; the uniformly mixed mixture is extruded and granulated by a twin-screw extruder; each section of the extruder is set The temperature is 190°C, the screw speed is 480r / min, and the vacuum degree is greater than 0.06MPa.

Embodiment 3

[0046] This embodiment provides a low-gloss, good-looking polypropylene composite material for automotive interiors (see Table 1 for the raw material formula) and a preparation method thereof.

[0047] The preparation method is as follows:

[0048] (1) 30 parts of HDPE powder and 2 parts of diethylpropylbenzene peroxide are mixed evenly, added to the side feeding tank, 70 parts of HDPE main feed is added, the extrusion temperature is set at 160 °C, and the extrusion reaction is carried out to prepare the dumb Optical masterbatch 1;

[0049] (2) Take the material according to the formulas of the embodiments and comparative examples in Table 1, and use high-speed mixing in a high-speed mixer for 4 to 8 minutes; the uniformly mixed mixture is extruded and granulated by a twin-screw extruder; each section of the extruder is set The temperature is 200°C, the screw speed is 500r / min, and the vacuum degree is greater than 0.06MPa.

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Abstract

The invention provides a low-gloss and good-appearance polypropylene composite material for automotive interiors and a preparation method thereof. The composite material is prepared from the followingraw materials in parts by weight: 45-90 parts of polypropylene, 5-12 parts of matte master batch, 0-25 parts of talcum powder, 0-25 parts of a flexibilizer and 0-2 parts of other auxiliaries. The matte master batch is prepared from 100 parts of polyethylene and 0.5-3 parts of a cross-linking agent as preparation raw materials through the following method: firstly, uniformly mixing not more than 50 parts of polyethylene and the cross-linking agent, adding the mixture into an extruder by side feeding, adding the rest of polyethylene into the extruder by main feeding, and carrying out melt extrusion granulation at 160-170 DEG C to obtain the matte master batch. The matte master batch is added into a raw material formula system, so that the surface roughness of the composite material can be improved, diffuse reflection is enhanced, the glossiness is reduced, and the product appearance defect caused by an overlarge crosslinking degree can be avoided. Meanwhile, the method is simple in stepand high in universality.

Description

technical field [0001] The invention relates to a polypropylene composite material for automobile interior decoration with low gloss and good appearance and a preparation method thereof, belonging to the field of polymer modification. Background technique [0002] Polypropylene has low density, good molding and processing performance, and large modification space. It is widely used in home appliances, automobiles and other fields; when polypropylene materials are used as exterior materials in home appliances, they often require high gloss; many invention patents High-gloss polypropylene provides a large number of effective preparation methods; polypropylene composite materials used as automotive interior trims not only need to meet the requirements of mechanical properties, but also have good appearance and other comprehensive properties; automotive interior trims are considered in addition to some decorative strips Aesthetically pleasing and high gloss in design, other part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L23/06C08L23/08C08K13/02C08K3/34C08K5/14C08J3/22
CPCC08L23/10C08J3/226C08J2323/10C08J2423/06C08L2205/02C08L2205/03C08L2205/035C08L23/0815C08L23/06C08K13/02C08K3/34C08K5/14
Inventor 洪剑城张东丁佳
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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