CN115277908A - Basalt fiber reinforced non-shielding/anti-falling/wear-resisting/heat-dissipating type mobile phone shell and preparation method thereof - Google Patents

Abstract

A basalt fiber reinforced non-shielding/anti-falling/wear-resisting/heat-dissipating mobile phone shell and a preparation method thereof are characterized in that basalt fiber fabric is used as a reinforcing material, a forming agent, a finish paint layer, a extinction layer and a primer layer are used for forming the basalt fiber reinforced non-shielding/anti-falling/wear-resisting/heat-dissipating mobile phone shell, and the novel mobile phone shell is prepared through basalt fiber fabric treatment, shearing, compression molding, curing, cutting, polishing, paint spraying and drying processes. The method is simple to operate and easy to process, and due to the excellent characteristics of the basalt fibers, the mobile phone shell has the advantages of no signal shielding, high strength, good wear resistance, falling resistance, corrosion resistance, natural texture, good hand feeling, low cost and the like.

Description

A basalt fiber-reinforced unshielded/drop-proof/wear-resistant/heat-dissipating mobile phone case and its preparation method

technical field

The invention relates to the field of preparation technology of basalt fiber-reinforced mobile phone cases, and more specifically, relates to a method for preparing a basalt fiber-reinforced non-shielding/drop-proof/wear-resistant/heat-dissipating mobile phone case.

Background technique

With the rapid development of communication technology and the popularization and application of electronic information equipment, smart phones have become an indispensable communication and entertainment tool in people's production and daily life. It is easy to be damaged, so there is a mobile phone case, which is commonly known as a mobile phone case. The mobile phone case can reduce scratches, falls, and wear of the mobile phone, and the insulated mobile phone case can also reduce magnetic field interference and enhance the mobile phone signal. Nowadays, there are a wide variety of mobile phone cases on the market, which can be divided into PC cases, leather, silica gel, cloth, hard plastic, leather cases, metal tempered glass cases, soft plastics, plush, silk, etc. according to their textures. At present, mobile phone cases have gradually formed an independent industry.

At present, most mobile phone shells are usually injection molding products. For example, Shen Li (CN 111805831) and Zhao Zhihui (CN111393848 A) have developed a mechanical in-die cut mobile phone shell and graphene, chopped Carbon fiber and some metal-reinforced mobile phone cases, both of which have a certain metal texture and high strength, but there are metal substances in the raw materials, which will affect the mobile phone signal to a certain extent, and the appearance is not beautiful and natural. In order to obtain different appearance texture effects, patterns are printed by screen printing and transfer film after injection molding. For example, Hu Zhiyun (CN 112571826) has developed a composite mobile phone case. The outer layer needs to print patterns, but these patterns are essentially Does not have the feel of natural materials and the pattern will wear and fade over time. There are also some products imitated by artificial leather, such as PU or TPU materials imitating the pattern of natural materials, and then glued to the surface of the product, which is also an imitation of natural materials, and the appearance does not achieve the effect of natural materials. There are also products woven with natural fibers at this stage, but they are mostly used in daily products, and are rarely used in mobile phone cases. For example, Shao Haicheng (CN 110128778) developed a carbon fiber mobile phone case, which has a natural and beautiful texture, but carbon fiber shields mobile phone signals. The effect will affect the mobile phone communication. Wang Ling (CN 213072788U) has invented a kind of mobile phone shell, has improved mobile phone shell strength and wear-resistant performance by arranging reinforcement layer and wear-resistant layer, but reinforcement layer and wear-resistant layer are thicker, cause its feel not good, and mobile phone The heat dissipation is poor, which affects the life of the mobile phone chip. Wenfeng (CN 104924632 B) invented a mobile phone case made of lamellar calcium carbonate and glass fiber as reinforcement materials, which is ultra-light and resistant to high and low temperatures. After injection molding, there are more processes and the operation is more cumbersome. Basalt fiber fabric is a new type of inorganic green high-performance fiber material that is drawn and woven at high speed by a wire drawing machine after melting natural basalt. It not only has high chemical and thermal stability, but also has excellent mechanical properties. Shielding, weather resistance, environmental protection and pollution-free, easy heat dissipation, low cost and other characteristics. And the overall thickness is controllable and the strength is high. Using basalt fiber fabric impregnated with high thermal conductivity molding agent as reinforcement material, the mobile phone case made has no signal shielding, fast heat dissipation, natural beauty, wear resistance, and good hand feeling. The performance of the product can meet the needs of people's daily life.

Contents of the invention

Technical problems to be solved:

1. The present invention provides a basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/heat-dissipating mobile phone case and a preparation method thereof, which is to solve the problem of shielding mobile phone signals by mobile phone cases such as carbon fiber and metal in the past.

2. The present invention provides a basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/heat-dissipating mobile phone case and a preparation method thereof, aiming at solving the problem that current mobile phone cases are not drop-proof and not wear-resistant.

3. The present invention provides a basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/heat-dissipating mobile phone case and a preparation method thereof, aiming at solving the difficulty of heat dissipation of traditional mobile phone cases and reducing the service life of mobile phone chips.

4. The present invention provides a basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/heat-dissipating mobile phone case and a preparation method thereof, which aims to solve the problem of fading and discoloration of the surface pattern of the current mobile phone case and the environmental pollution of the materials used. Manufacturing process complex issues.

Technical solutions:

In order to achieve the above technical requirements, the present invention provides a basalt fiber-reinforced non-shielding/drop-proof/wear-resistant/heat-dissipating mobile phone case and its preparation method, which are achieved through the following technical solutions:

A basalt fiber-reinforced unshielded/drop-proof/wear-resistant/heat-dissipating mobile phone case consists of a topcoat layer, a matte layer, a primer layer, a basalt fiber fabric layer impregnated with a forming agent, and a primer layer from the inside to the outside. , matting layer, topcoat layer.

A basalt fiber reinforced non-shielding/drop-proof/wear-resistant/heat-dissipating mobile phone case provided by the present invention includes the topcoat layer, wherein the topcoat preferably includes chlorinated rubber paint, AE5009H elastic rubber paint, TPR rubber A kind of paint. The present invention has no particular limitation on the source of the topcoat used.

A basalt fiber reinforced non-shielding/drop-proof/wear-resistant/heat-dissipating mobile phone case provided by the present invention includes the primer layer, wherein the primer preferably includes bisphenol A liquid epoxy resin primer, bisphenol One of the F-type liquid epoxy primers. The present invention has no particular limitation on the source of the primer used.

A basalt fiber-reinforced unshielded/drop-resistant/wear-resistant/heat-dissipating mobile phone case provided by the present invention includes a molding agent impregnated with basalt fiber fabric, wherein the molding agent preferably includes F-51 phenolic resin and W-30 thermal conductive silicone grease , One of TC-5888 silicone resins. The present invention has no particular limitation on the source of the forming agent used.

A basalt fiber-reinforced non-shielding/drop-proof/wear-resistant/heat-dissipating mobile phone case provided by the present invention includes a matting agent, wherein the matting agent preferably includes pure polyester matting RB3329, SJ-166 matting agent, and SJ-2800 matting agent One of. The present invention has no particular limitation on the source of the matting agent used.

A basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/radiating mobile phone case provided by the present invention includes basalt fiber fabric, wherein the basalt fiber fabric agent preferably includes 3K twill basalt fiber cloth, 3K plain weave basalt fiber cloth, 1K plain weave One or both of basalt fiber cloth, 1K twill basalt fiber cloth, and 1K mesh hollow structure basalt fiber fabric. The present invention has no special limitation on the source of the basalt fiber fabric used.

Preparation:

The present invention also provides a method for preparing a basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/radiating mobile phone case, comprising the following steps:

(1) Immerse the basalt fiber fabric in the molding agent and dry it. Using the basalt fiber fabric as the main material, immerse the basalt fiber fabric in the molding agent for 2.0-5.0 hours, take out the basalt fiber fabric and let it dry for 2.0-8.0 hours, and set it aside. The forming agent added in the present invention is mainly thermoset together with basalt fiber to form the most important basic structure of the mobile phone case, followed by the selection of heat-dissipating forming agent, which can make it have excellent heat dissipation performance;

(2) According to the specified size, the basalt fiber fabric in step (1) is jammed and cut with a cutting machine, and it is set aside;

(3) Press the 2-5 layers of basalt fiber fabric cut in step (2) to the outer layer of the mobile phone metal mold with a hot and cold press (the pressure is 5.0MPa-30.0MPa, and the extrusion time is 5.0-30.0 second), put it into the rubber sleeve of soft material, and finally flatten it with a hot and cold press (the pressure is 5.0MPa-30.0MPa, the extrusion time is 5.0-30.0 seconds), and it is ready for use;

(4) Cover the outside of the rubber sleeve in step (3) with a plastic-sealed protective bag again, and vacuum it with a vacuum machine. After the treatment is completed, it will be cured in a high-pressure vacuum tank (120.0-180.0°C, 1.0-3.0 hours, 800.0 -900.0KPa), standby;

(5) Remove the plastic-sealed protective bag and its rubber sleeve cured in step (4), cut the shape of the mobile phone case and all the holes, then take off the metal mold, and use alcohol to wet the cut mobile phone case Wipe it clean with a towel, use 3000.0 mesh sandpaper to manually polish the corners of the mobile phone case in sequence, and wipe the dust with an alcohol wipe again, and set it aside;

(6) Wipe and dry the mobile phone case in step (5), spray the primer evenly by hand or machine, put it in the oven to dry (60.0-80.0°C, 8.0-15.0 minutes), take it out, and deburr it with 3000.0 The corners of the mobile phone case are manually polished with sandpaper to remove the burrs generated when the primer is sprayed. After polishing, the mobile phone case is wiped with alcohol and white electric oil in sequence. After drying, the matting agent is sprayed evenly by hand or by machine. Dry in an oven (65.0-85.0°C, 10.0-15.0 minutes), and set aside. In the present invention, by spraying the primer, it is mainly to seal the inside and play a protective role; secondly, it can increase the adhesion of the topcoat, increase the fullness of the topcoat, and ensure the uniform absorption of the topcoat. Spraying the matting agent can eliminate the reflective effect when there is light, and eliminate the light through the diffuse reflection of the matting agent, making the mobile phone case more visually beautiful;

(7) Spray the topcoat evenly on the mobile phone case after drying in step (6) by hand or machine, then put it into the oven for drying (75.0-90.0°C, 20.0-40.0 minutes), and finally transfer it to a large oven (80.0- 100.0°C, 1.0-3.0 hours), the present invention is obtained. The invention makes the mobile phone case smooth, scratch-resistant, wear-resistant and weather-resistant by spraying the topcoat, and can increase its hand feeling and smoothness;

Positive effect of the present invention:

Compared with the prior art, the present invention provides a basalt fiber-reinforced non-shielding/drop-proof/wear-resistant/heat-dissipating mobile phone case and a preparation method thereof, the positive effects of which are:

1. A basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/heat-dissipating mobile phone case and preparation method thereof, adopting basalt fiber fabric as the material for strengthening the mobile phone case, avoiding the shielding of the case material to the signal of the mobile phone, Improve call quality.

2. A basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/heat-dissipating mobile phone case and its preparation method, the basalt fiber fabric is firmly combined with the resin, and the surface is treated with multi-layer spraying to improve the mobile phone case. Anti-drop performance, wear resistance.

3. A basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/heat-dissipating mobile phone case and its preparation method. The basalt fiber fabric adopts a special weaving method, leaving specific gaps between each strand of fiber, and using a heat-dissipating type The forming agent makes it easy to dissipate heat from the mobile phone case and increase the service life of the mobile phone chip.

4. A basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/heat-dissipating mobile phone case and its preparation method. The fiber pattern of the mobile phone case of the present invention is naturally beautiful without fading or fading, and the processing technology is simple and the price is low. Low, the basalt fiber fabric used as reinforcement fabric is derived from nature and is environmentally friendly and pollution-free.

Description of drawings:

Figure 1: The influence of the mobile phone case on the signal, the mobile phone case with basalt fiber as reinforcement material has no shielding on the mobile phone signal.

Figure 2: Block diagram of the manufacturing process of basalt fiber reinforced mobile phone case.

Figure 3: Plan view of basalt fiber reinforced mobile phone case.

Detailed ways

Example 1:

Select gray 3K plain basalt fiber fabric as the reinforcing material of the mobile phone case, use 100.0ml of W-30 thermal conductive silicone grease as the forming liquid of the basalt fiber fabric, soak the 3K plain basalt fiber fabric of 40.0×50.0cm in the above forming liquid, The basalt fiber fabric needs to be completely soaked, the immersion time is 2.0 hours, take out the basalt fiber fabric and let it dry at room temperature for 3.0 hours. Cut the basalt fiber fabric treated with the molding agent to size with a cutting machine, and press the two-layer fabric to the outer layer of the mobile phone shell metal mold with a hot and cold press after cutting (pressure 10.0MPa, extrusion 10.0 seconds). Take it out and put it into the outer silicone sleeve of soft material, and finally flatten it with a hot and cold press (pressure 8.0MPa, extrusion for 12.0 seconds). After flattening, put it into a plastic-sealed protective bag, evacuate it with a vacuum machine, and then put it into a hot autoclave for curing (130.0°C, 2.0 hours, 850.0kPa). Remove the cured plastic protective bag and its outer silicone sleeve, use a laser cutting machine to cut the shape of the mobile phone case and all the holes, and then remove the metal mold. Use alcohol to wipe the cut mobile phone case, use 3000.0 mesh sandpaper to manually polish the corners in sequence, and then wipe the dust clean for a preliminary appearance inspection. Use the machine to evenly spray the bisphenol A liquid epoxy resin primer on the mobile phone case that has passed the inspection, and put it in an oven to dry (65.0°C, 9.0 minutes). After taking it out, sand the phone case again with sandpaper. After polishing, use alcohol and white electric oil to wipe the phone case in turn. After drying, use a machine to evenly spray pure polyester matte RB3329, and put it in an oven to dry (70.0°C, 10.0 minutes) . Take it out and spray chlorinated rubber paint evenly with a machine, then put it in an oven to dry (75.0°C, 28.0 minutes), and finally transfer to a large oven (80.0°C, 1.9 hours) to get a gray/2 layers/3K plain basalt fiber Fabric reinforced phone case.

Example 2:

Select the blue 3K twill basalt fiber fabric as the reinforcing material for the mobile phone case, use 110.0 ml of TC-5888 silicone resin as the forming liquid of the basalt fiber fabric, soak the 3K twill basalt fiber fabric of 50.0×50.0cm in the above forming liquid , The basalt fiber fabric needs to be completely soaked, the immersion time is 2.1 hours, take out the basalt fiber fabric and let it dry at room temperature for 3.2 hours. The basalt fiber fabric treated with the forming agent is cut to size with a cutting machine, and the three-layer fabric is pressed to the outer layer of the mobile phone shell metal mold with a hot and cold press after cutting (pressure 11.0MPa, extrusion 12.0 seconds). Take it out and put it into the outer silicone sleeve of soft material, and finally flatten it with a hot and cold press (pressure 10.0Mpa, extrusion for 12.0 seconds). After flattening, put it into a plastic-sealed protective bag, evacuate it with a vacuum machine, and then put it into a hot autoclave for curing (140.0°C, 1.8 hours, 820.0kPa). Remove the cured plastic protective bag and its outer silicone sleeve, use a laser cutting machine to cut the shape of the mobile phone case and all the holes, and then remove the metal mold. Use alcohol to wipe the cut mobile phone case, use 3000.0 mesh sandpaper to manually polish the corners in sequence, and then wipe the dust clean for a preliminary appearance inspection. Use the machine to evenly spray the bisphenol F type liquid epoxy primer on the mobile phone case that has passed the inspection, and put it in an oven to dry (63.0°C, 8.0 minutes). After taking it out, sand the phone case again with sandpaper. After polishing, use alcohol and white electric oil to wipe the phone case in turn. After drying, use a machine to evenly spray pure polyester matte RB3329, and put it in an oven to dry (68.0°C, 8.0 minutes) . Take it out and spray AE5009H elastic rubber paint evenly with a machine, then put it in an oven to dry (80.0°C, 25.0 minutes), and finally transfer it to a large oven (78.0°C, 2.0 hours), and you can get a blue/3-layer/3K twill basalt Textile phone case.

Example 3:

Choose black 1K plain weave basalt fiber fabric as the reinforcing material of the mobile phone case, use 125.0 ml of TC-5888 silicone resin as the forming liquid of the basalt fiber fabric, soak the 1K plain weave basalt fiber fabric of 50.0×40.0cm in the above forming liquid, The basalt fiber fabric needs to be completely soaked, the immersion time is 2.2 hours, take out the basalt fiber fabric and let it air at room temperature for 3.5 hours. The basalt fiber fabric treated with the forming agent is cut to size with a cutting machine, and the four-layer fabric is pressed to the outer layer of the mobile phone shell metal mold with a hot and cold press after cutting (pressure 12.0MPa, extrusion 11.0 seconds). Take it out and put it into the outer silicone sleeve of soft material, and finally flatten it with a hot and cold press (pressure 9.5MPa, extrusion for 11.0 seconds). After flattening, put it into a plastic-sealed protective bag, evacuate it with a vacuum machine, and then put it into a hot autoclave for curing (150.0°C, 1.8 hours, 845.0kPa). Remove the cured plastic protective bag and its outer silicone sleeve, use a laser cutting machine to cut the shape of the mobile phone case and all the holes, and then remove the metal mold. Use alcohol to wipe the cut mobile phone case, use 3000.0 mesh sandpaper to manually polish the corners in sequence, and then wipe the dust clean for a preliminary appearance inspection. Use the machine to evenly spray the bisphenol F type liquid epoxy resin primer on the mobile phone case that has passed the inspection, and put it in an oven to dry (68.5°C, 9.5 minutes). After taking it out, sand the phone case again with sandpaper. After polishing, use alcohol and white electric oil to wipe the phone case in turn. After drying, use a machine to evenly spray SJ-166 matting agent, and put it in an oven to dry (75.5°C, 9.5 minutes) . Take it out and spray TPR rubber paint evenly with a machine, then put it in an oven to dry (73.5°C, 29.5 minutes), and finally transfer to a large oven (85°C, 2.4 hours) to get a black 4-layer/1k/plain basalt fiber fabric Reinforced phone case.

Example 4:

Select the blue 4K twill basalt fiber fabric as the reinforcing material of the mobile phone case, use 130.0ml of W-30 thermal conductive silicone grease as the forming liquid of the basalt fiber fabric, soak the 4K twill basalt fiber fabric of 60.0×60.0cm in the above forming liquid , The basalt fiber fabric needs to be completely soaked, the immersion time is 2.0 hours, take out the basalt fiber fabric and let it air for 3.2 hours at room temperature. Cut the basalt fiber fabric treated with the molding agent to size with a cutting machine, and press the two-layer fabric to the outer layer of the mobile phone shell metal mold with a hot and cold press after cutting (pressure 12.5MPa, extrusion 11.5 seconds). Take it out and put it into the outer silicone sleeve of soft material, and finally flatten it with a hot and cold press (pressure 10.5MPa, extrusion for 10.0 seconds). After flattening, put it into a plastic-sealed protective bag, evacuate it with a vacuum machine, and then put it into a hot autoclave for curing (160.0°C, 1.9 hours, 830.0kPa). Remove the cured plastic protective bag and its outer silicone sleeve, use a laser cutting machine to cut the shape of the mobile phone case and all the holes, and then remove the metal mold. Use alcohol to wipe the cut mobile phone case, use 3000.0 mesh sandpaper to manually polish the corners in sequence, and then wipe the dust clean for a preliminary appearance inspection. Use a machine to evenly spray the bisphenol A liquid epoxy primer on the mobile phone case that has passed the inspection, and put it in an oven to dry (67.5°C, 12.5 minutes). After taking it out, sand the phone case again with sandpaper. After polishing, use alcohol and white electric oil to wipe the phone case in turn. After drying, use a machine to evenly spray SJ-2800 matting agent, and put it in an oven to dry (78.5°C, 11.5 minutes) . Take it out and spray TPR rubber paint evenly with a machine, then put it in an oven to dry (75.5°C, 32.5 minutes), and finally transfer it to a large oven (80°C, 2.7 hours) to get a blue/2-layer/4K twill basalt fiber Fabric reinforced phone case.

Example 5:

Select gray 1K mesh hollow structure basalt fiber fabric as the reinforcing material of the mobile phone case, use 150.0 ml of F-51 phenolic resin as the forming liquid of the basalt fiber fabric, soak the 4K twill basalt fiber fabric of 70.0×70.0cm in the above forming liquid In the process, the basalt fiber fabric needs to be completely infiltrated, the immersion time is 2.0h, and the basalt fiber fabric is taken out and left to air at room temperature for 3.2h. Cut the basalt fiber fabric treated with the molding agent to size with a cutting machine, and press the two-layer fabric to the outer layer of the mobile phone shell metal mold with a hot and cold press after cutting (pressure 12.5MPa, extrusion 11.5 seconds). Take it out and put it into the outer silicone sleeve of soft material, and finally flatten it with a hot and cold press (pressure 10.5MPa, extrusion for 10.0 seconds). After flattening, put it into a plastic-sealed protective bag, evacuate it with a vacuum machine, and then put it into a hot autoclave for curing (160.0°C, 1.9 hours, 830.0kPa). Remove the cured plastic protective bag and its outer silicone sleeve, use a laser cutting machine to cut the shape of the mobile phone case and all the holes, and then remove the metal mold. Use alcohol to wipe the cut mobile phone case, use 3000.0 mesh sandpaper to manually polish the corners in sequence, and then wipe the dust clean for a preliminary appearance inspection. Use a machine to evenly spray the bisphenol A liquid epoxy primer on the mobile phone case that has passed the inspection, and put it in an oven to dry (67.5°C, 12.5 minutes). After taking it out, polish the mobile phone case again with sandpaper. After polishing, use alcohol and white electric oil to wipe the mobile phone case in turn. After drying, use a machine to evenly spray SJ-166 matting agent, and put it in an oven to dry (78.5°C, 11.5 minutes) . Take it out and spray AE5009H elastic rubber paint evenly with a machine, then put it in an oven to dry (75.5°C, 32.5 minutes), and finally transfer it to a large oven (80°C, 2.7 hours), and you can get a gray/2 layers/1K mesh hollow Phone case reinforced with structural basalt fiber fabric.

Comparative example 1:

Select 3K fiberglass fabric as the reinforcing material of the mobile phone case, use 130.0 ml of F-51 phenolic resin as the forming liquid of the glass fiber fabric, soak the 3K plain glass fiber fabric of 60.0×60.0cm in the above forming liquid, and the glass fiber fabric It needs to be completely soaked, and the soaking time is 2.0 hours. Take out the glass fiber fabric and let it dry at room temperature for 3.2 hours, and then transfer it to a refrigerator at -5.0°C for 1.5 hours. Cut the fiberglass fabric treated with the molding agent by size with a cutting machine, and press the two-layer fabric to the outer layer of the mobile phone shell metal mold with a hot and cold press after cutting (pressure 12.5MPa, extrusion 11.5 seconds). Take it out and put it into the outer silicone sleeve of soft material, and finally flatten it with a hot and cold press (pressure 10.5MPa, extrusion for 10.0 seconds). After flattening, put it into a plastic-sealed protective bag, evacuate it with a vacuum machine, and then put it into a hot autoclave for curing (160.0°C, 1.9 hours, 830.0kPa). Remove the cured plastic protective bag and its outer silicone sleeve, use a laser cutting machine to cut the shape of the mobile phone case and all the holes, and then remove the metal mold. Use alcohol to wipe the cut mobile phone case, use 3000.0 mesh sandpaper to manually polish the corners in sequence, and then wipe the dust clean for a preliminary appearance inspection. Use a machine to evenly spray the bisphenol A liquid epoxy primer on the mobile phone case that has passed the inspection, and put it in an oven to dry (67.5°C, 12.5 minutes). After taking it out, sand the phone case again with sandpaper. After polishing, use alcohol and white electric oil to wipe the phone case in turn. After drying, use a machine to evenly spray SJ-2800 matting agent, and put it in an oven to dry (78.5°C, 11.5 minutes) . Take it out and spray TPR rubber paint evenly with a machine, then put it in an oven to dry (75.5°C, 32.5 minutes), and finally transfer it to a large oven (80°C, 2.7 hours) to get a 2-layer glass fiber fabric reinforced mobile phone case .

Comparative example 2:

Select 3K plain weave carbon fiber fabric as the reinforcing material of the mobile phone case, use 140.0 ml of TC-5888 silicone resin as the forming liquid of the carbon fiber fabric, soak the 3K plain weave carbon fiber fabric of 55.0×55.0cm in the above forming liquid, the carbon fiber fabric needs to be completely Immersion, the immersion time is 2.0 hours, take out the carbon fiber fabric and let it dry at room temperature for 3.2 hours, and then transfer it to a refrigerator at -5.0°C for 1.5 hours. Cut the carbon fiber fabric treated with the molding agent according to size with a cutting machine, and press the two layers of fabric to the outer layer of the mobile phone shell metal mold with a hot and cold press after cutting (pressure 12.5MPa, extrusion 11.5 seconds). Take it out and put it into the outer silicone sleeve of soft material, and finally flatten it with a hot and cold press (pressure 10.5Mpa, extrusion for 10.0 seconds). After flattening, put it into a plastic-sealed protective bag, evacuate it with a vacuum machine, and then put it into a hot autoclave for curing (160.0°C, 1.9 hours, 830.0kPa). Remove the cured plastic protective bag and its outer silicone sleeve, use a laser cutting machine to cut the shape of the mobile phone case and all the holes, and then remove the metal mold. Use alcohol to wipe the cut mobile phone case, use 3000.0 mesh sandpaper to manually polish the corners in sequence, and then wipe the dust clean for a preliminary appearance inspection. Use the machine to evenly spray the bisphenol F type liquid epoxy resin primer on the mobile phone case that has passed the inspection, and put it in an oven to dry (67.5°C, 12.5 minutes). After taking it out, sand the phone case again with sandpaper. After polishing, use alcohol and white electric oil to wipe the phone case in turn. After drying, use a machine to evenly spray SJ-2800 matting agent, and put it in an oven to dry (78.5°C, 11.5 minutes) . Take it out and spray TPR rubber paint evenly with a machine, then put it in an oven to dry (75.5°C, 32.5 minutes), and finally transfer it to a large oven (80°C, 2.7 hours) to get a 2-layer carbon fiber fabric reinforced mobile phone case.

Performance experiments were performed on the mobile phone cases prepared in Examples 1-5 and Comparative Examples 1-2. The peel strength test method is in accordance with GB/T2790-1995 "Adhesive-Peel Test of Bonded Specimens Combining Flexible Materials and Rigid Materials Part 2: 180° Peeling", and the drop resistance test is in accordance with GB/T 2423.7-2018 "Environmental Testing of Electrical and Electronic Products Part 2 Test Method Experiment Ed: Free Fall", the adhesion test is in accordance with GB/T 9286-1998 "Cross-cut test of paint and varnish film", and friction test, the experimental results are shown in Table 1 And Figures 1, 2, and 3.

Each embodiment performance measurement of table 1

Claims (7)

1. A basalt fiber-reinforced non-shielding/drop-proof/wear-resistant/heat-dissipating mobile phone case, characterized in that, the mobile phone case includes topcoat layer, matting layer, primer layer, Basalt fiber fabric layer impregnated with forming agent, primer layer, matting layer, topcoat layer. 2. A basalt fiber reinforced non-shielding/drop-resistant/wear-resistant/radiating mobile phone case according to claim 1, characterized in that: the topcoat layer is chlorinated rubber paint, water-based rubber paint, One of AE5009H elastic rubber paint and TPR rubber paint. 3. A basalt fiber-reinforced unshielded/drop-proof/wear-resistant/heat-dissipating mobile phone case according to claim 1, characterized in that: the primer layer is phosphating primer, bisphenol A type One of liquid epoxy resin primers, bisphenol F type liquid epoxy resin primers. 4. A basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/radiating mobile phone case according to claim 1, characterized in that: the molding agent impregnated with basalt fabric is F-51 phenolic resin , W-30 thermal grease, TC-5888 silicone resin in one. 5. A basalt fiber-reinforced unshielded/drop-resistant/wear-resistant/radiating mobile phone case according to claim 1, characterized in that: the basalt fabric is 3K twill basalt fiber cloth, 3K plain basalt fiber One or more of 1K plain basalt fiber cloth, 1K mesh hollow structure basalt fiber fabric, 1K twill basalt fiber cloth, 4K plain basalt fiber cloth, 4K twill basalt fiber cloth. 6. A basalt fiber-reinforced non-shielding/drop-proof/wear-resistant/heat-dissipating mobile phone case according to claim 1, characterized in that: said matting agent is pure polyester matting RB3329, XF24-XF68 matting Paint, one of SJ-166 matting agent, SJ-2800 matting agent. 7. A method for preparing a basalt fiber-reinforced non-shielding/drop-resistant/wear-resistant/radiating mobile phone case according to claims 1-6, characterized in that the specific implementation steps are: (1) Adopt basalt fiber fabric as reinforcing material, forming agent as soaking liquid, immerse basalt fiber fabric in forming agent and place for 2.0-5.0 hours, take out basalt fiber fabric and let it air for 2.0-8.0 hours, and set aside; (2) According to the specified size, the basalt fiber fabric in step (1) is jammed and cut with a cutting machine, and it is set aside; (3) Press the 2-5 layers of basalt fiber fabric cut in step (2) to the outer layer of the mobile phone metal mold with a hot and cold press (the pressure is 5.0MPa-30.0MPa, and the extrusion time is 5.0-30.0 second), put it into the rubber sleeve of soft material, and finally flatten it with a hot and cold press (the pressure is 5.0MPa-30.0MPa, the extrusion time is 5.0-30.0 seconds), and it is ready for use; (4) Cover the outside of the rubber sleeve in step (3) with a plastic-sealed protective bag again, and vacuum it with a vacuum machine. After the treatment is completed, it will be cured in a high-pressure vacuum tank (120.0-180.0°C, 1.0-3.0 hours, 800.0 -900.0KPa), standby; (5) Remove the plastic-sealed protective bag and its rubber sleeve cured in step (4), cut the shape of the mobile phone case and all the holes, then take off the metal mold, and use alcohol to wet the cut mobile phone case Wipe it clean with a towel, use 3000.0 mesh sandpaper to manually polish the corners of the mobile phone case in sequence, and wipe the dust with an alcohol wipe again, and set it aside; (6) Wipe and dry the mobile phone case in step (5), spray the primer evenly, put it in the oven to dry (60.0-80.0°C, 8.0-15.0 minutes), take it out, deburr, and use 3000.0 mesh sandpaper to clean the mobile phone The corners of the case are manually polished in order to remove the burrs generated when spraying the primer. After polishing, use alcohol and white electric oil to wipe the mobile phone case in turn. After drying, spray the matting agent evenly and put it in the oven to dry (65.0-85.0℃ , 10.0-15.0 minutes), stand-by; (7) Cover the mobile phone case dried in step (6), evenly spray the topcoat, then put it in the oven for drying (75.0-90.0°C, 20.0-40.0 minutes), and finally transfer to the oven for drying (80.0-100.0°C, 1.0 -3.0 hours), to obtain the present invention.

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