High-strength and high-toughness glass fiber reinforced composite hard mica material

Abstract

The application relates to the technical field of mica composite materials, in particular to a high-strength and high-toughness glass fiber reinforced composite hard mica material. The high-strength and high-toughness glass fiber reinforced composite hard mica material is made of a core layer mica precast plate, a plurality of intermediate layer mica precast plates and a surface layer mica precast plate; the intermediate layer mica precast plate is made of a plurality of intermediate layer mica precast unit thin plates; the intermediate layer mica precast unit thin plate is made of phlogopite paper A and a toughening and reinforcing type pre-impregnated tape A, the toughening and reinforcing type pre-impregnated tape A in the intermediate layer mica precast plate is combined between adjacent phlogopite papers A; the toughening and reinforcing type pre-impregnated tape A comprises a pre-impregnated resin matrix A and a glass fiber mesh cloth arranged in the pre-impregnated resin matrix A. The hard mica composite material provided by the application has excellent bending resistance and good impact toughness, and the application range of the hard mica material is expanded.

Description

Technical Field

[0001] This application relates to the field of mica composite materials technology, and in particular to a high-strength and high-toughness glass fiber reinforced composite hard mica material. Background Technology

[0002] Rigid mica material is an electrical protective material with excellent high-temperature resistance and insulation safety performance, prepared using mica base material, epoxy resin, or silicone resin as a binder. Existing rigid mica materials are made by hot pressing multiple layers of mica paper, allowing for stamping and preventing delamination. Through stamping, complex-shaped rigid mica products can be obtained to meet the needs of industrial production applications.

[0003] The relatively high flexural strength of existing hard mica materials mainly relies on the high-density three-dimensional cross-linked network formed by epoxy resin or silicone resin. Although this gives them excellent flexural properties, the highly dense three-dimensional cross-linked network also makes hard mica materials brittle and deviates from good impact toughness, thus limiting their application range. Utility Model Content

[0004] To address the technical problem of impact toughness deviation in existing hard mica materials, this invention provides a high-strength, high-toughness glass fiber reinforced composite hard mica material.

[0005] The high-strength and high-toughness glass fiber reinforced composite hard mica material provided in this application is achieved through the following technical solution: A high-strength, high-toughness glass fiber reinforced composite rigid mica material comprises a core mica precast board, several intermediate mica precast boards, and a surface mica precast board. The intermediate mica precast boards are made of several intermediate mica precast unit thin plates. Each intermediate mica precast unit thin plate is made of phlogopite paper A and toughening and reinforcing prepreg tape A, wherein the toughening and reinforcing prepreg tape A in the intermediate mica precast board is composited between adjacent phlogopite paper A. The toughening and reinforcing prepreg tape A comprises a prepreg resin matrix A and a glass fiber mesh located inside the prepreg resin matrix A.

[0006] The hard mica composite material provided in this application has excellent bending resistance and good impact toughness, thus expanding the application range of hard mica materials.

[0007] Preferably, the intermediate fiberglass mesh is a plain weave; the mesh size of the intermediate fiberglass mesh is 1mm*1mm, 2mm*2mm, 3mm*3mm, or 5mm*5mm; and the warp and weft yarns used in the weaving of the intermediate fiberglass mesh are both high-strength HS glass fibers.

[0008] More preferably, the mesh size of the intermediate fiberglass mesh is 2mm*2mm.

[0009] High-strength HS glass fiber mesh can impart good bending resistance and impact toughness to rigid mica composites.

[0010] More preferably, the intermediate fiberglass mesh fabric is a plain weave; the intermediate fiberglass mesh fabric is a high-strength HS glass fiber / meta-aramid fiber blended fabric.

[0011] Preferably, the warp yarns used in the weaving of the high-strength HS glass fiber / meta-aramid fiber blended fabric include high-strength HS glass fiber warp yarns and meta-aramid fiber warp yarns arranged at intervals, and the spacing between adjacent high-strength HS glass fiber warp yarns and meta-aramid fiber warp yarns is 1 mm, 2 mm, 3 mm or 5 mm.

[0012] More preferably, the weft yarns used in the weaving of the high-strength HS glass fiber / meta-aramid fiber blended fabric include high-strength HS glass fiber weft yarns and meta-aramid fiber weft yarns arranged at intervals, and the spacing between adjacent high-strength HS glass fiber weft yarns and meta-aramid fiber weft yarns is 1 mm, 2 mm, 3 mm or 5 mm.

[0013] High-strength HS glass fiber / meta-aramid fiber hybrid fabric, formed by high-strength HS glass fiber and meta-aramid fiber, can give rigid mica composite materials better bending resistance and impact toughness.

[0014] Preferably, the core mica precast board is made of a plurality of phlogopite paper B and toughened and reinforcing prepreg tape B laminated between adjacent phlogopite paper B; the upper and lower surfaces of the core mica precast board are both toughened and reinforcing prepreg tape B; the toughened and reinforcing prepreg tape B includes a prepreg resin matrix B and an aramid woven fabric located inside the prepreg resin matrix B.

[0015] Preferably, the surface mica precast panel is made of phloem paper C and toughened and reinforced prepreg tape C, wherein the toughened and reinforced prepreg tape C is laminated on the surface of phloem paper C facing away from the intermediate mica precast panel; the toughened and reinforced prepreg tape C includes a prepreg resin matrix C and a surface fiberglass mesh cloth located inside the prepreg resin matrix C.

[0016] Preferably, the surface fiberglass mesh is a plain weave; the mesh size of the surface fiberglass mesh is 1mm*1mm, 2mm*2mm, or 3mm*3mm; and the warp and weft yarns used in the weaving of the surface fiberglass mesh are both high-strength HS glass fibers.

[0017] By adopting the above technical solutions, the overall bending strength and impact toughness can be improved, and the overall wear resistance can be improved.

[0018] Preferably, the thickness of the core mica precast panel is 1 to 5 times the thickness of the surface mica precast panel; the thickness of the intermediate mica precast panel is 3 to 12 times the thickness of the core mica precast panel.

[0019] More preferably, the thickness of the core mica precast panel is twice the thickness of the surface mica precast panel; the thickness of the intermediate mica precast panel is 6 to 8 times the thickness of the core mica precast panel.

[0020] In summary, the present invention has the following advantages: 1. In this application, toughened and reinforced prepreg tape imparts good bending resistance and impact toughness to hard mica composite materials, thus solving the technical problem of impact toughness deviation in existing hard mica materials.

[0021] 2. The surface fiberglass mesh in the surface mica precast panel of this application can improve the bending strength and impact toughness of rigid mica material on the one hand, and improve the wear resistance of rigid mica material on the other hand.

[0022] 3. The aramid woven fabric in the core mica precast panel of this application can further improve the impact toughness of rigid mica material while ensuring the overall high temperature resistance and insulation performance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the high-strength and high-toughness glass fiber reinforced composite hard mica material in Example 1.

[0024] In the diagram, 1. Core layer mica precast board; 11. Phlogopite paper B; 12. Toughened and reinforced prepreg tape B; 121. Prepreg resin matrix B; 122. Aramid woven fabric; 2. Intermediate layer mica precast board; 20. Intermediate layer mica precast unit sheet; 21. Phlogopite paper A; 22. Toughened and reinforced prepreg tape A; 221. Prepreg resin matrix A; 222. Intermediate layer fiberglass mesh; 3. Surface layer mica precast board; 31. Phlogopite paper C; 32. Toughened and reinforced prepreg tape C; 321. Prepreg resin matrix C; 322. Surface layer fiberglass mesh. Detailed Implementation

[0025] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Example 1: Refer to Figure 1The high-strength, high-toughness glass fiber reinforced composite rigid mica material is made of a core layer mica precast plate 1, an intermediate layer mica precast plate 2, and a surface layer mica precast plate 3. The thickness of the core layer mica precast plate 1 is 1 to 5 times the thickness of the surface layer mica precast plate 3, and the thickness of the intermediate layer mica precast plate 2 is 3 to 12 times the thickness of the core layer mica precast plate 1. Preferably, the thickness of the core layer mica precast plate 1 is 2 times the thickness of the surface layer mica precast plate 3, and the thickness of the intermediate layer mica precast plate 2 is 6 to 8 times the thickness of the core layer mica precast plate 1.

[0027] Reference Figure 1 The intermediate mica precast panel 2 is formed by hot pressing several intermediate mica precast unit thin plates 20. The thickness of the intermediate mica precast panel 2 is controlled by controlling the number of intermediate mica precast unit thin plates 20. The intermediate mica precast unit thin plate 20 is made of phlogopite paper A21 and toughened and reinforced prepreg tape A22. The number of phlogopite paper A21 and toughened and reinforced prepreg tape A22 is equal. In the intermediate mica precast panel 2, the phlogopite paper A21 is hot-pressed and laminated between adjacent toughened and reinforced prepreg tapes A22. That is, one surface of the intermediate mica precast unit thin plate 20 is laminated with toughened and reinforced prepreg tape A22, while the other surface is phlogopite paper A21.

[0028] Reference Figure 1 The toughened and reinforced prepreg tape A22 includes a prepreg resin matrix A221 and an intermediate fiberglass mesh 222 located inside the prepreg resin matrix A221. The prepreg resin matrix A221 is formed by hot pressing two silicone resin semi-cured films. The silicone adhesive used in the silicone resin semi-cured film is the same as the silicone adhesive in phlogopite, which is commercially available Shin-Etsu KR 242A silicone resin from Japan. Specifically, silicone resin KR 242A is coated on release paper, and after hot drying to remove the organic solvent, a silicone resin semi-cured film is formed. The intermediate fiberglass mesh 222 is then laminated between the two silicone resin semi-cured films and hot-pressed to obtain the toughened and reinforced prepreg tape A22.

[0029] The intermediate fiberglass mesh 222 is a plain weave fabric. Both the warp and weft yarns used in weaving the intermediate fiberglass mesh 222 are high-strength HS glass fiber, thus the intermediate fiberglass mesh 222 is a high-strength HS glass fiber mesh. In the high-strength HS glass fiber mesh woven using high-strength HS glass fiber as warp and weft yarns, the spacing of the high-strength HS glass fiber is 1mm*1mm, 2mm*2mm, 3mm*3mm, or 5mm*5mm. Therefore, the mesh size of the intermediate fiberglass mesh 222 is 1mm*1mm, 2mm*2mm, 3mm*3mm, or 5mm*5mm. Preferably, the mesh size of the intermediate fiberglass mesh 222 is 3mm*3mm. The high-strength HS glass fiber is commercially available from Nanjing Glass Fiber Research and Design Institute Co., Ltd., specifically high-strength HS2, HS4, or HS6 glass fiber. High-strength HS2 glass fiber is preferred as it meets the toughening and reinforcement requirements and has a relatively low raw material cost.

[0030] Reference Figure 1 The core mica precast panel 1 is made of several phlogopite paper B11 and toughened and reinforcing prepreg tape B12 laminated between adjacent phlogopite paper B11. Both the upper and lower surfaces of the core mica precast panel 1 are made of toughened and reinforcing prepreg tape B12, that is, the number of toughened and reinforcing prepreg tape B12 in the core mica precast panel 1 is one more than the number of phlogopite paper B11.

[0031] Reference Figure 1 The toughened and reinforcing prepreg tape B12 in the core mica precast panel 1 includes a prepreg resin matrix B121 and an aramid woven fabric 122 located inside the prepreg resin matrix B121. The aramid woven fabric 122 is a commercially available aramid woven fabric, and the mesh size can be selected as 1mm*1mm, 2mm*2mm, 3mm*3mm, or 5mm*5mm. Preferably, the mesh size of the aramid woven fabric 122 can be selected as 2mm*2mm.

[0032] The prepreg resin matrix B121 is formed by hot pressing two silicone resin semi-cured films. The silicone binder used in the silicone resin semi-cured film is the same as that used in phlogopite, namely commercially available Shin-Etsu KR 242A silicone resin from Japan. Specifically, silicone resin KR 242A is coated onto release paper, and after heat drying to remove the organic solvent, a silicone resin semi-cured film is formed. Aramid woven fabric 122 is then laminated onto the two silicone resin semi-cured films and pressed between the two films to obtain the toughened and reinforced prepreg tape B12.

[0033] Reference Figure 1 The surface mica precast panel 3 is made of gold mica paper C31 and toughened and reinforced prepreg tape C32. The toughened and reinforced prepreg tape C32 is laminated on the surface of gold mica paper C31 facing away from the middle layer mica precast panel 2.

[0034] Reference Figure 1 The toughened and reinforced prepreg tape C32 includes a prepreg resin matrix C321 and a surface fiberglass mesh 322 located inside the prepreg resin matrix C321. The surface fiberglass mesh 322 has a plain weave structure, and the warp and weft yarns used in its weaving are both high-strength HS glass fibers. The high-strength HS glass fibers in the high-strength HS glass fiber mesh woven using high-strength HS glass fibers as warp and weft yarns have a spacing of 1mm*1mm, 2mm*2mm, or 3mm*3mm. Therefore, the mesh size of the surface fiberglass mesh 322 is 1mm*1mm, 2mm*2mm, or 3mm*3mm. Preferably, the mesh size of the surface fiberglass mesh 322 is 2mm*2mm. The high-strength HS glass fiber is commercially available high-strength HS2, high-strength HS4, or high-strength HS6 glass fiber from Nanjing Glass Fiber Research and Design Institute Co., Ltd. High-strength HS2 glass fiber is preferred as it meets the toughening and reinforcement requirements and has a relatively low raw material cost.

[0035] The prepreg resin matrix C321 is formed by hot pressing two silicone resin semi-cured films. The silicone binder used in the silicone resin semi-cured film is the same as that used in phlogopite, namely commercially available Shin-Etsu KR 242A silicone resin from Japan. Specifically, silicone resin KR 242A is coated onto release paper, and after heat drying to remove the organic solvent, a silicone resin semi-cured film is formed. A surface fiberglass mesh 322 is then laminated onto the two silicone resin semi-cured films and pressed between them to obtain the toughened and reinforced prepreg tape C32.

[0036] The difference between Example 2 and Example 1 is that the intermediate fiberglass mesh fabric 222 is a plain-woven high-strength HS glass fiber / meta-aramid fiber blended fabric. The warp yarns used in the weaving of the high-strength HS glass fiber / meta-aramid fiber blended fabric include high-strength HS glass fiber warp yarns and meta-aramid fiber warp yarns arranged at intervals. The high-strength HS glass fiber warp yarns are commercially available high-strength HS2 glass fiber, high-strength HS4 glass fiber, or high-strength HS6 glass fiber from Nanjing Glass Fiber Research and Design Institute Co., Ltd. Preferably, the high-strength HS glass fiber is high-strength HS2 glass fiber, which can meet the toughening and reinforcement requirements and has a relatively low raw material cost. The meta-aramid fiber warp yarns are meta-aramid filaments from Dongguan Tekelun New Material Application Co., Ltd. The spacing between adjacent high-strength HS glass fiber warp yarns and meta-aramid fiber warp yarns is 1mm, 2mm, 3mm, or 5mm; preferably, the spacing is 3mm.

[0037] The weft yarns used in the weaving of the high-strength HS glass fiber / meta-aramid fiber blended fabric include high-strength HS glass fiber weft yarns and meta-aramid fiber weft yarns arranged alternately. The spacing between adjacent high-strength HS glass fiber weft yarns and meta-aramid fiber weft yarns is 1 mm, 2 mm, 3 mm, or 5 mm. Preferably, the spacing between adjacent high-strength HS glass fiber weft yarns and meta-aramid fiber weft yarns is 3 mm. The high-strength HS glass fiber weft yarn is commercially available high-strength HS2 glass fiber, high-strength HS4 glass fiber, or high-strength HS6 glass fiber from Nanjing Glass Fiber Research and Design Institute Co., Ltd. High-strength HS glass fiber is preferably high-strength HS2 glass fiber, which can meet the toughening and reinforcement requirements and has a relatively low raw material cost. The meta-aramid fiber weft yarn is meta-aramid filament from Dongguan Tekelun New Material Application Co., Ltd.

[0038] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-strength, high-toughness glass fiber reinforced composite rigid mica material, characterized in that: The rigid mica material is made of a core layer mica precast board (1), an intermediate layer mica precast board (2), and a surface layer mica precast board (3). The intermediate layer mica precast board (2) is made of several intermediate layer mica precast unit thin plates (20). The intermediate layer mica precast unit thin plate (20) is made of phlogopite paper A (21) and toughened and reinforced prepreg tape A (22). The phlogopite paper A (21) in the intermediate layer mica precast board (2) is composited between adjacent toughened and reinforced prepreg tapes A (22). The toughened and reinforced prepreg tape A (22) includes a prepreg resin matrix A (221) and an intermediate layer fiberglass mesh (222) located inside the prepreg resin matrix A (221).

2. The high-strength, high-toughness glass fiber reinforced composite hard mica material according to claim 1, characterized in that: The intermediate fiberglass mesh fabric (222) is a plain weave; the mesh size of the intermediate fiberglass mesh fabric (222) is 1mm*1mm or 2mm*2mm or 3mm*3mm or 5mm*5mm; the warp and weft yarns used in the weaving of the intermediate fiberglass mesh fabric (222) are both high-strength HS glass fibers.

3. The high-strength, high-toughness glass fiber reinforced composite rigid mica material according to claim 1, characterized in that: The intermediate fiberglass mesh fabric (222) is a plain weave; the intermediate fiberglass mesh fabric (222) is a high-strength HS glass fiber / meta-aramid fiber blended fabric.

4. The high-strength, high-toughness glass fiber reinforced composite rigid mica material according to claim 3, characterized in that: The warp yarns used in the weaving of the high-strength HS glass fiber / meta-aramid fiber blended fabric include high-strength HS glass fiber warp yarns and meta-aramid fiber warp yarns arranged at intervals, with the spacing between adjacent high-strength HS glass fiber warp yarns and meta-aramid fiber warp yarns being 1mm, 2mm, 3mm, or 5mm; the weft yarns used in the weaving of the high-strength HS glass fiber / meta-aramid fiber blended fabric include high-strength HS glass fiber weft yarns and meta-aramid fiber weft yarns arranged at intervals, with the spacing between adjacent high-strength HS glass fiber weft yarns and meta-aramid fiber weft yarns being 1mm, 2mm, 3mm, or 5mm.

5. The high-strength, high-toughness glass fiber reinforced composite hard mica material according to claim 1, characterized in that: The core mica precast board (1) is made of a plurality of phlogopite paper B (11) and toughened and reinforced prepreg tape B (12) composited between adjacent phlogopite paper B (11); the upper and lower surfaces of the core mica precast board (1) are both toughened and reinforced prepreg tape B (12); the toughened and reinforced prepreg tape B (12) includes a prepreg resin matrix B (121) and an aramid woven fabric (122) located inside the prepreg resin matrix B (121).

6. The high-strength, high-toughness glass fiber reinforced composite hard mica material according to claim 1, characterized in that: The surface mica precast panel (3) is made of phloem paper C (31) and toughened and reinforced prepreg tape C (32). The toughened and reinforced prepreg tape C (32) is composited on the surface of phloem paper C (31) facing away from the intermediate mica precast panel (2). The toughened and reinforced prepreg tape C (32) includes a prepreg resin matrix C (321) and a surface fiberglass mesh cloth (322) located inside the prepreg resin matrix C (321).

7. The high-strength, high-toughness glass fiber reinforced composite hard mica material according to claim 6, characterized in that: The surface fiberglass mesh (322) is a plain weave; the mesh size of the surface fiberglass mesh (322) is 1mm*1mm or 2mm*2mm or 3mm*3mm; the warp and weft yarns used in the weaving of the surface fiberglass mesh (322) are both high-strength HS glass fiber.

8. The high-strength, high-toughness glass fiber reinforced composite hard mica material according to claim 1, characterized in that: The thickness of the core mica precast panel (1) is 1 to 5 times the thickness of the surface mica precast panel (3); the thickness of the intermediate mica precast panel (2) is 3 to 12 times the thickness of the core mica precast panel (1).

9. The high-strength, high-toughness glass fiber reinforced composite hard mica material according to claim 8, characterized in that: The thickness of the core mica precast panel (1) is twice the thickness of the surface mica precast panel (3); the thickness of the intermediate mica precast panel (2) is 6 to 8 times the thickness of the core mica precast panel (1).

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