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Continuous fiber ultrathin composite material sheet with different surface patterns and preparation method and application of sheet

A continuous fiber and composite material technology, applied in the field of continuous fiber ultra-thin composite material sheets, can solve the problems of unsatisfactory appearance requirements, many voids on the surface, and single appearance, and achieve high strength, good surface scratch resistance, heat resistance and Strong corrosion resistance effect

Active Publication Date: 2014-05-07
GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Continuous fiber composite materials such as carbon fiber and glass fiber can basically meet the various performance requirements of the above products, but cannot meet the requirements of high-quality and fine appearance
Ordinary carbon fiber / glass fiber has a single appearance and many voids on the surface. Even if a high-gloss surface can be achieved, the cost will be very high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of the continuous fiber composite material base material (Ⅰ): After the continuous fiber is immersed in the resin with a resin content of 30-45wt%, it passes through a 13a-level smooth hot-pressed flat mold at a temperature of 140-160°C and a pressure of 0.2 Under the condition of ~10.0MPa, it can be obtained by hot pressing for 7~30min; the thickness of the continuous fiber composite material substrate (I) is 0.20~0.50mm; the continuous fiber is selected from carbon fibers with woven lines or unidirectional UD lines, One or more of glass fiber, basalt fiber, aramid fiber cloth, and silk; the resin is selected from halogen-free flame-retardant epoxy resin, phenolic resin, olefin base, and modified thermoplastic with a tg point above 100°C. One or more resins.

[0034] The preparation method of the PET material (Ⅲ) with different patterns: the PET base film, the pattern layer, the UV curing layer, and the ink protection layer are sequentially stack...

Embodiment A1~A4

[0035] Embodiment A1~A4 and comparative example B1~B4: the preparation of resin adhesive

[0036] With the modified bisphenol A type epoxy resin of embodiment A1~A4 and comparative example B1 as matrix, add the accelerator that MX toughening agent and 50wt% leveling agent and 50wt% reactive diluent are formed in proportion, mix uniformly, Then it is cured by an aliphatic amine curing agent to obtain a resin adhesive with 100% solid content.

[0037] Table 1 The content of each component of the resin adhesive (percentage by weight)

[0038] components A1 A2 A3 A4 B1 B2 B3 B4 Modified bisphenol A epoxy resin / wt% 70 65 75 70 55 / / / Ordinary bisphenol A epoxy resin / wt% / / / / / 100 / / PUR one-component polyurethane adhesive / wt% / / / / / / 100 / Two-component polyurethane adhesive / wt% / / / / 100 Toughener / wt% 15 20 10 10 30 / / / Accelerator / wt% 5 5 5 5 10 / / / Aliphat...

Embodiment 1

[0040]Take the carbon fiber continuous fiber composite material substrate (I) with a thickness of 0.25mm, sandblast / polish it with 1000~1500 mesh sandpaper on its surface, and dry it to obtain the pretreated substrate (I); take a thickness of 0.20mm mm PET material (Ⅲ) with wire drawing, corona treatment, so that the surface dyne value is above 30mN / m, to obtain pretreated PET material (Ⅲ); evenly coated with the resin obtained in Example A1 in Table 1 On the pretreated substrate (Ⅰ), the adhesive is covered with a high-temperature-resistant PET release film, placed on a flat mold with a smooth surface of 13a, heated to above 100°C, and cured for 5 minutes to obtain a pre-coating and pre-curing base material (I); on the pre-coated and pre-cured base material (I), evenly coat the resin adhesive again to form a resin adhesive layer (II), cover the pre-treated PET material (III), and pass Squeeze out the air by manual or roller rolling, place it in a 13a-level smooth flat mold, h...

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Abstract

The invention discloses a continuous fiber ultrathin composite material sheet with different surface patterns. The continuous fiber ultrathin composite material sheet comprises a continuous fiber composite material base material (I), wherein the upper surface of the continuous fiber composite material base material (I) is coated with a resin adhesive layer (II); the upper surface of the resin adhesive layer (II) is covered with a PET (polythylene terephthalate) material (III) with different patterns; the continuous fiber composite material base material (I) is 0.20-0.50mm thick; the PET material (III) with different patterns is 0.11-0.30mm thick. The continuous fiber ultrathin composite material sheet disclosed by the invention has different attractive surface patterns and is high in smoothness, high in surface scratch resistance, high in elastic modulus, high in impact resistance, high in heat resistance and high in corrosion resistance and can be widely applied to shells of various electronic products, electric appliances, aerospace equipment and the like; furthermore, a preparation method for the continuous fiber ultrathin composite material sheet is simple in technology, is suitable for large-scale continuous production and has the advantages of high yield, high efficiency, low cost and high product yield.

Description

technical field [0001] The invention relates to a continuous fiber ultra-thin composite material sheet with different surface patterns, its preparation method and application. Background technique [0002] With the development of modern economy and the advancement of science and technology, various electronic products and electrical equipment have developed rapidly. The product requires high-quality and fine surface appearance, with a high-strength shell that can resist falling, and at the same time, the quality should be light enough, and it must also have performance requirements such as good weather resistance, scratch resistance, and corrosion resistance. Continuous fiber composite materials such as carbon fiber and glass fiber can basically meet various performance requirements of the above products, but cannot meet the requirements of high-quality and fine appearance. Ordinary carbon fiber / glass fiber has a single appearance and many voids on the surface. Even if a h...

Claims

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Application Information

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IPC IPC(8): B32B7/12B32B27/04B32B27/36C09J163/00
Inventor 陈大华黄险波吴晓军高雄宋威
Owner GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV
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