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Composite material and preparation method thereof and electronic device with composite material

A technology of composite materials and prefabricated parts, applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve problems such as single visual effect and tactile feeling, long time, large manpower and material resources, etc.

Active Publication Date: 2013-01-23
LENOVO (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Grinding in the spraying process takes a long time for manual processing, consumes a lot of manpower and material resources, and affects the consistency of the product
In addition, a single spray paint limits the appearance of carbon fiber products, and the visual effect and touch are single

Method used

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  • Composite material and preparation method thereof and electronic device with composite material
  • Composite material and preparation method thereof and electronic device with composite material
  • Composite material and preparation method thereof and electronic device with composite material

Examples

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preparation example Construction

[0044] The present invention also provides a method for preparing a composite material, comprising: a) soaking the first material with fiber characteristics in the resin composition to obtain a prepreg;

[0045] b) placing at least one prepreg and at least one preform formed of a second material with metallic properties in a mold for hot pressing to obtain the composite material; the linear thermal expansion coefficient of the prepreg is the same as that of the prepreg wherein the prepreg forms the support layer; and the preform forms the facing layer.

[0046] Compared with the prior art, the composite material provided by the present invention includes a support layer and a surface layer, and the support layer is formed by a first material soaked in a resin composition, and the first material is preferably carbon fiber. According to the present invention, The carbon fiber is preferably a prepreg sheet obtained by immersing continuous carbon fiber strands in epoxy resin and t...

Embodiment 3

[0055] Take 8 epoxy resin pre-impregnated carbon fiber sheets with a thickness of 0.1 mm, with a size of 1 m × 1 m. The prepreg carbon fiber sheet stacks are placed with the edges aligned. Coat the surface of the uppermost carbon fiber sheet with thermosetting epoxy resin adhesive to form a coating film, and then take an aluminum alloy foil of the same specification with a thickness of 0.1 mm and place it on the thermosetting epoxy resin adhesive coating film. Thereby, a preform is obtained. The word lenovo is etched on the surface of the aluminum alloy foil.

[0056] The preform was placed on the lower pressure film of the vacuum hot press, the mold was closed but no pressure was applied, and then a vacuum was applied to make the vacuum degree reach 1 kPa, the temperature was raised to 130 ° C, hot pressing for 15 minutes, and pressure holding for 5 minutes Then take out the composite material.

Embodiment 4

[0058] Take 4 epoxy resin prepreg carbon fiber sheets with a thickness of 0.1 mm, and the specifications are 1 m × 1 m. A piece of foamed polyethylene sheet with a thickness of 0.5mm and a specification of 1m × 1m. The pre-impregnated carbon fiber sheet and the foamed polyethylene sheet such as figure 2 Stacked in the order shown, edge-to-edge. Coat the surface of the uppermost carbon fiber sheet with thermosetting epoxy resin adhesive to form a coating film, and then take an aluminum alloy foil of the same specification with a thickness of 0.1 mm and place it on the thermosetting epoxy resin adhesive coating film. Thereby, a preform is obtained. The word lenovo is etched on the surface of the aluminum alloy foil.

[0059] The pre-pressed part was placed on the lower pressure film of a vacuum hot-pressing machine, evacuated to make the vacuum degree reach 5 kPa, the temperature was raised to 130° C., hot-pressed for 15 minutes, and the composite material was taken out after ...

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Abstract

The invention provides a composite material which comprises a supporting layer and a surface layer, wherein the surface layer is arranged on the supporting layer; the supporting layer is prepared through soaking a first material in a resin combination and then curing the obtained product, the first material has fiber properties, the surface layer is composed of a second material, and the second material has metal properties; the linear thermal expansion coefficient of the resin combination is close to the linear thermal expansion coefficient of the second material; and the first material is a high-strength and high-hardness material. Compared with the prior art, the composite material provided by the invention is high in strength and hardness, and the surface of the composite material has a richer appearance effect. The invention also provides a preparation method of the composite material and an electronic device with the composite material.

Description

technical field [0001] The invention relates to the technical field of material synthesis, in particular to a composite material and a preparation method thereof. Background technique [0002] Carbon fiber is a microcrystalline graphite material obtained by carbonization and graphitization of organic fibers. It not only has the inherent characteristics of carbon materials, but also has the flexibility and processability of textile fibers. It is a new generation of reinforcing fibers. Compared to conventional glass fibers (GF), the Young's modulus of carbon fibers is more than 3 times higher. Compared with Kevlar fiber (KF-49), carbon fiber not only has about twice the Young's modulus, but also does not swell or swell in organic solvents, acids and alkalis, and is corrosion-resistant. It is precisely because of the many advantages of carbon fiber that it is widely used in automobiles, electronics, textiles, military industry, sports equipment and other fields. [0003] In t...

Claims

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Application Information

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IPC IPC(8): B32B15/08B32B27/04
Inventor 尤德涛郝宁
Owner LENOVO (BEIJING) CO LTD
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