Weather-resistant anti-bulging mica plate

Abstract

The utility model discloses a weather-resistant anti-bulge mica plate, which comprises mica plate substrates arranged on two sides, and the mica plate substrates are formed by gluing a plurality of layers of mica paper and then hot-pressing; a plurality of layers of composite linings with the same size are formed between the mica plate base plates on the two sides in an overlapping mode, each composite lining comprises two layers of mica paper and a reinforcing layer formed between the two layers of mica paper, and the reinforcing layer is a high-strength fiber fabric; a high-strength fiber mesh surface is lined between the inner side surface of the mica plate substrate and the outermost composite lining, and a layer of chopped aramid fiber is uniformly formed at the interface position between the two side surfaces of the high-strength fiber mesh surface and the mica plate substrate / the composite lining. The weather-resistant and anti-bulge mica plate has excellent weather resistance and anti-bulge performance, and is suitable for being used in outdoor or severe environments.

Description

Technical Field

[0001] The utility model relates to mica paper products in the technical field of insulating materials, and particularly relates to a weather-resistant and anti-bulging mica plate. Background Technique

[0002] Mica is a special flaky silicate mineral, which has extremely high electrical insulation; at the same time, it also has good transparency, excellent peelability, chemical stability, reducibility, and can maintain the above excellent physical and chemical properties at high temperatures, and is a very important insulating material.

[0003] Although mica has many excellent physical and chemical properties, in actual use, especially in outdoor or harsh environmental conditions, problems such as poor weather resistance and easy bulging often occur, seriously affecting its service life and insulation performance. Therefore, in order to overcome the shortcoming of easy bulging of mica plates in outdoor or harsh environmental conditions, developing a mica plate with excellent weather resistance and effective anti-bulging has become an urgent technical problem to be solved in the industry. Content of the Utility Model

[0004] The technical problem solved by the utility model is to provide a weather-resistant and anti-bulging mica plate to solve the defects in the above technical background.

[0005] The technical problem solved by the utility model is realized by adopting the following technical scheme:

[0006] A weather-resistant and anti-bulging mica plate includes mica plate substrates arranged on both sides, and the mica plate substrates are formed by hot pressing after sizing multiple layers of mica paper;

[0007] Multiple layers of composite liners with the same size are formed in a laminated manner between the mica plate substrates on both sides. A single-layer composite liner includes two layers of mica paper and a reinforcing layer formed between the two layers of mica paper, and the reinforcing layer is a high-strength fiber fabric;

[0008] A high-strength fiber mesh surface is lined between the inner side surface of the mica plate substrate and the outermost composite liner, and a layer of short-cut aramid fiber is uniformly formed at the cross-section positions between the two side surfaces of the high-strength fiber mesh surface and the mica plate substrate / composite liner.

[0009] As a further limitation, the proportion of the mica plate substrates on both sides in the overall thickness of the mica plate is 30-40%; and the multiple layers of composite liners occupy 60-70% of the remaining thickness.

[0010] As a further limitation, the number of laminated layers of the composite liners in a single weather-resistant and anti-bulging mica plate does not exceed 20 layers, preferably 5-15 layers.

[0011] As a further limitation, the forming method of the multiple composite linings between the two mica plate substrates is hot pressing, with a forming pressure of 10 to 15 MPa and a hot pressing temperature of 150 to 200 °C.

[0012] As a further limitation, the mica plate substrate is stamped with an outer wrapping hem at the outer edge, so as to form a disc-shaped volume cavity inside the hem position, and the composite linings are stacked and formed in the disc-shaped volume cavity.

[0013] As a further limitation, a layer of graphite paper is attached to the inner side surface of the mica plate substrate. The size of the graphite paper is 85 to 90% of the size of the mica plate substrate, and it is formed at the middle position of the inner side surface of the mica plate substrate; the outer side surface of the graphite paper is attached to the composite lining.

[0014] As a further limitation, the fiber raw materials used for the high-strength fiber fabric and the high-strength fiber mesh surface are high-modulus and high-temperature-resistant fibers, preferably meta-aramid fibers, carbon fibers or glass fibers.

[0015] As a further limitation, the thickness of the high-strength fiber fabric is 0.1 to 0.3 mm, and the high-strength fiber mesh surface is 0.6 to 1.2 times the thickness of the mica paper used in the corresponding composite lining.

[0016] As a further limitation, the mesh size of the high-strength fiber mesh surface is 1 to 4 mm 2 。

[0017] Beneficial effects: By adopting the combination of multiple layers of mica paper, high-strength fiber fabric, high-strength fiber mesh surface and short-cut aramid fibers, a weather-resistant and anti-bulging mica plate of the present utility model can enhance the overall structure of the mica plate internally and form a spatial crosslinking, so that when the mica plate bears external forces or temperature changes, it can evenly disperse stress and reduce local deformation, thereby effectively avoiding the occurrence of bulging phenomena; it not only effectively improves the weather resistance and anti-bulging ability of the mica plate, making the whole mica plate have higher integrity and durability, but also maintains the excellent electrical insulation performance and thermal conductivity of the mica material, enabling it to adapt to harsh outdoor working environments. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the single-side structure of the preferred embodiment of the present utility model.

[0019] Wherein: 1, outer wrapping hem; 2, mica plate substrate; 3, high-strength fiber mesh surface; 4, mica paper; 5, reinforcing layer; 6, graphite paper; 7, composite lining. Detailed Embodiments

[0020] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below with reference to specific illustrations.

[0021] See Figure 1 A weather-resistant anti-bulging mica plate. In this embodiment, the weather-resistant anti-bulging mica plate includes mica plate substrates 2 formed on both sides. The mica plate substrates 2 are obtained by sizing multiple layers of mica paper 4 and then synthesizing them through a hot pressing process. The one-time hot pressing process ensures the tight combination between the mica papers in the mica plate substrates 2 and further optimizes their physical and chemical properties. The mica plate substrates 2 on both sides are used to ensure the surface properties and basic electrical insulation of the formed weather-resistant anti-bulging mica plate, and at the same time enhance the stability of its overall structure.

[0022] In Figure 1 The corresponding embodiment, the left mica plate substrate 2 has an outer edge contour larger than that of the right mica plate substrate 2. The left mica plate substrate 2 is stamped with an outer wrap-around edge 1 at the position of the extra outer contour. The outer wrap-around edge 1 is perpendicular to the plane of the mica plate substrate 2, so as to form a disk-shaped volume cavity inside at the position of the outer wrap-around edge 1 on the outer edge of the mica plate substrate 2. The right mica plate substrate 2 is used to seal the surface of the disk-shaped volume cavity.

[0023] Six layers of composite liners 7 are formed in a stacked manner in the disk-shaped volume cavity of the left mica plate substrate 2. Each layer of the composite liner 7 is formed with the same process requirements to ensure the consistency of its size and performance. When forming, each composite liner 7 is composed of two layers of mica paper 4 and a high-strength fiber fabric 5 sandwiched in the middle. The two layers of mica paper 4 are used to achieve the electrical insulation performance and thermal conductivity of the mica plate. The addition of the high-strength fiber fabric 5 sandwiched in the middle greatly improves the overall strength and stability of the composite liner 7, so that when the composite liner 7 is subjected to external forces or temperature changes, it can evenly disperse stress and reduce local deformation, thus playing a role in enhancing and effectively avoiding the occurrence of bulging phenomena.

[0024] The single composite liner 7 is independently formed to facilitate subsequent secondary forming processing. During the secondary forming process, first, multiple layers of the composite liner 7 are stacked in the disc-shaped cavity of the left mica board substrate 2 in a preset order, ensuring that the mica paper layer orientation of each layer of the composite liner 7 is the same as that of the mica paper layer of the mica board substrate 2. A layer of high-strength fiber mesh surface 3 is evenly laid between the inner side surface of the mica board substrate 2 and the outermost composite liner 7; at the interface positions between the two side surfaces of the high-strength fiber mesh surface 3 and the mica board substrate 2 / composite liner 7, a layer of chopped aramid fibers (not marked) is also evenly formed. The addition of these chopped aramid fibers enables the entire mica board to more evenly disperse stress and reduce local deformation when subjected to external forces or temperature changes, thereby further improving the weather resistance and anti-bulging ability of the mica board.

[0025] It should be noted that during the secondary forming process of this embodiment, the various structural layers are formed by secondary hot pressing after applying glue. The glue used for applying glue is phenol A type epoxy resin glue or bisphenol F type epoxy resin glue; during the secondary hot pressing process, the forming pressure is 12 MPa and the hot pressing temperature is 180 °C, ensuring the tight stacking and good bonding between the multiple layers of the composite liner 7 between the mica board substrates 2.

[0026] In the formed weather-resistant and anti-bulging mica board, the mica board substrates 2 on both sides account for 35% of the overall thickness of the mica board, while the multiple layers of the composite liner 7 occupy 65% of the remaining thickness. This design not only ensures the basic performance of the mica board substrate 2 but also fully exerts the reinforcing effect of the composite liner 7.

[0027] In this embodiment, the combination of the high-strength fiber fabric 5 and the high-strength fiber mesh surface 3 provides an additional reinforcing effect for the mica board, making its overall performance more superior. Both the high-strength fiber fabric 5 and the high-strength fiber mesh surface 3 use meta-aramid fiber as the fiber raw material. This material has the characteristics of high modulus and high temperature resistance. It not only has excellent strength and high temperature resistance but also can form a good bond with the mica paper 4, further improving the overall performance of the mica board. The thickness of the high-strength fiber fabric 5 is 0.2 mm, which is used to play a role of skeleton support in the composite liner 7, ensuring the strength and stability of the composite liner 7; while the thickness of the high-strength fiber mesh surface 3 is 0.8 times the thickness of the single-sided mica paper 4 used in the corresponding composite liner 7, and the mesh size is 4 mm 2 ; the high-strength fiber mesh surface 3 has good permeability and supportability, and can form an effective spatial cross-linked structure in the interface adhesive layer to serve as a connection bridge between the mica board substrate 2 and the composite liner 7, helping to disperse stress, reduce local deformation, and enhance the structural integrity of the mica board when the entire mica board is subjected to external forces or temperature changes.

[0028] In this embodiment, a layer of graphite paper 6 is respectively attached to the inner surfaces of the mica plate substrates 2 on both sides. The size of the graphite paper 6 is 88% of the size of the mica plate substrate 2, and it is attached to the middle position of the inner side surface of the mica plate substrate 2. The attachment of the graphite paper 6 enables it to assist in improving the thermal conductivity and electrical insulation performance of the mica plate without damaging the overall performance of the mica plate.

[0029] A weather-resistant and anti-bulging mica plate of the present utility model, by adopting a combination of multiple layers of mica paper, high-strength fiber fabric, high-strength fiber mesh surface, and short-cut aramid fibers, successfully solves the problem that the mica plate is prone to bulging under outdoor or harsh environmental conditions, making it an optional insulating material suitable for harsh outdoor working environmental conditions. In addition, the weather-resistant and anti-bulging mica plate of the present utility model also has good processability and plasticity, and can be processed by cutting, bending, stamping, etc. according to needs to meet the requirements of different application scenarios. At the same time, its manufacturing process is simple and the cost is low, which is conducive to large-scale production and popularization and application.

[0030] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A weather-resistant and anti-bulging mica plate, characterized in that, It includes mica plate substrates arranged on both sides, and the mica plate substrates are formed by hot pressing after sizing multiple layers of mica paper; Multiple composite liners with the same size are formed in a laminated manner between the mica plate substrates on both sides. A single composite liner includes two layers of mica paper and a reinforcing layer formed between the two layers of mica paper, and the reinforcing layer is a high-strength fiber fabric; A high-strength fiber mesh surface is lined between the inner side surface of the mica plate substrate and the outermost composite liner, and a layer of chopped aramid fibers is uniformly formed at the interface positions between the two side surfaces of the high-strength fiber mesh surface and the mica plate substrate / composite liner.

2. The weather-resistant and anti-bulging mica plate according to claim 1, wherein The proportion of the mica plate substrates on both sides in the overall thickness of the mica plate is 30-40%; while the multiple composite liners occupy 60-70% of the remaining thickness.

3. The weather-resistant and anti-bulging mica plate according to claim 1, characterized in that, The number of laminated layers of the composite liners in a single weather-resistant anti-bulging mica plate does not exceed 20 layers.

4. The weather-resistant anti-bulging mica plate according to claim 1, characterized in that, The forming method of the multiple composite liners between the mica plate substrates on both sides is hot pressing.

5. The weather-resistant anti-bulging mica plate according to claim 1, wherein The mica plate substrate is stamped with an outer folded edge at the outer edge, so as to form a disc-shaped volume cavity inside the folded edge position, and the composite liners are laminated and formed in the disc-shaped volume cavity.

6. The weather-resistant anti-bulging mica plate according to claim 1, characterized in that, A layer of graphite paper is attached to the inner side surface of the mica plate substrate. The size of the graphite paper is 85-90% of the size of the mica plate substrate and is formed at the middle position of the inner side surface of the mica plate substrate; the outer side surface of the graphite paper is attached to the composite liner.

7. The weather-resistant anti-bulging mica plate according to claim 1, characterized in that, The fiber raw materials used for the high-strength fiber fabric and the high-strength fiber mesh surface are meta-aramid fibers, carbon fibers or glass fibers.

8. The weather-resistant anti-bulging mica plate according to claim 1, characterized in that, The thickness of the high-strength fiber fabric is 0.1-0.3 mm, and the high-strength fiber mesh surface is 0.6-1.2 times the thickness of the mica paper used in the corresponding composite liner.

9. The weather-resistant and anti-bulging mica plate according to claim 1, wherein The mesh size of the high-strength fiber mesh surface is 1-4 mm².

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