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A kind of shading low linear expansion coefficient polypropylene composite material and preparation method thereof

A technology of low linear expansion and composite materials, which is applied in the field of polypropylene composite materials and its preparation, and can solve problems such as unsatisfactory applications and no shading effect

Active Publication Date: 2022-05-10
上海日之升科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it does not have a shading effect and cannot meet the application in the LED field.

Method used

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  • A kind of shading low linear expansion coefficient polypropylene composite material and preparation method thereof
  • A kind of shading low linear expansion coefficient polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4 and comparative example 1-7

[0053] A light-shielding low linear expansion coefficient polypropylene composite material, its components and parts by weight are shown in Table 1.

[0054] Its preparation method is as follows:

[0055] The raw materials are mixed according to the proportion and then added to the twin-screw extruder, melt-blended, extruded, drawn, water-cooled, dried, and pelletized to obtain a light-shielding low linear expansion coefficient polypropylene composite material.

[0056] In the extrusion process, a double vacuum is opened in the front and rear conveying sections, and the vacuum degree is ≤-0.08MPa;

[0057] The rotational speed of the twin-screw extruder is 200-300 r / min, and the temperature of each zone is controlled at 210-230°C.

[0058] Wherein, the preparation conditions of Comparative Examples 1, 3, and 5 are the same as those of Example 1; the preparation conditions of Comparative Examples 2, 4, and 7 are the same as those of Example 3;

[0059] Table 1

[0060]

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Abstract

The invention provides a light-shielding low linear expansion coefficient polypropylene composite material and a preparation method thereof. The composite material comprises the following components in parts by weight: 100 parts of copolymerized polypropylene; 0.5-1 parts of nucleation system; 10 parts of titanium dioxide ‑20 parts; 1‑5 parts of carbon nanotubes; 5‑10 parts of basalt fiber; 10‑30 parts of glass fiber; 10‑30 parts of talcum powder; 5‑10 parts of compatibilizer. The polypropylene composite material prepared by the present invention has a thickness of more than 1 mm can achieve full shading effect, has an extremely low linear expansion coefficient, does not crack after long-term use, and does not crack when subjected to high and low temperature cycles of -20-85°C for 5000 hours.

Description

technical field [0001] The invention relates to a polypropylene composite material and a preparation method thereof, in particular to a light-shielding low linear expansion coefficient polypropylene composite material and a preparation method thereof. Background technique [0002] As the fourth-generation light source, LED has the advantages of long life, energy saving, environmental protection, safety, and rich colors. It has important applications in many aspects such as display, lighting, signal indication, and medical treatment. Its economic benefits and social significance are huge. It is one of the most promising high-tech fields in the 21st century. [0003] As LED applications become more and more extensive, LED materials have gradually become a hot spot in material development. In the field of high-power lamps and lanterns, because they will generate more heat during use, they need better heat dissipation during use. Metal parts will be installed at the bottom of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L33/02C08L51/06C08K13/04C08K7/14C08K7/10C08K3/34C08K3/22C08K3/04
CPCC08L23/14C08L2205/03C08K2003/2241C08K2201/011C08L2205/24C08L2203/20C08L33/02C08L51/06C08K13/04C08K7/14C08K7/10C08K3/34C08K3/22C08K3/041
Inventor 娄小安陈晓东张强王尹杰陈光伟李莉陈超秦凡
Owner 上海日之升科技有限公司
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