Synthetic mica tape for wire and cable production and manufacturing method thereof

Abstract

The invention provides a synthetic mica tape for wire and cable production and a manufacturing method thereof. The synthetic mica tape comprises glass fiber cloth; and the first adhesive is arranged at the top of the glass fiber cloth. According to the synthetic mica tape for wire and cable production and the manufacturing method thereof provided by the invention, the mica paper is immersed into the treating fluid formed by mixing the organic silica gel, the nano ceramic powder, the nano silicon dioxide and the silane coupling agent, and then is dried to obtain the flame-retardant mica paper; therefore, the flame-retardant effect of the produced mica tape can be improved, and the safety in use is improved; the preparation method comprises the following steps: preparing acrylic resin, texanol, nano aerogel, magnesium hydroxide and nano white carbon black into a mixed solution so as to prepare a first adhesive and a second adhesive, then uniformly smearing the bottom of flame-retardant mica paper with the first adhesive, and smearing the top of the flame-retardant mica paper with the second adhesive, thereby obtaining the flame-retardant mica paper through double gluing treatment. And the flame retardant property of the mica tape is further enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of wire and cable production, and in particular to a synthetic mica tape used for wire and cable production and a manufacturing method thereof. Background Art

[0002] Wires and cables are wire products used to transmit electrical (magnetic) energy, information and realize electromagnetic energy conversion. Wires and cables in a broad sense are also referred to as cables. Cables in a narrow sense refer to insulated cables, which can be defined as: a collection of the following parts; one or more insulated cores, and their respective coatings, total protective layers and outer sheaths. Cables may also have additional uninsulated conductors. Synthetic mica tape has excellent high temperature resistance and flame resistance, and is often used as an insulating layer in the production of wires and cables.

[0003] For example, in the patent application announced as CN 114242356 A in the prior art, synthetic mica paper is connected to glass fiber cloth through a first adhesive, and the synthetic mica paper is connected to a polyester film through a second adhesive, and a protective layer is coated on the surface of the polyester film. The present invention uses polyester film to make the synthetic mica tape have excellent rigidity, hardness and toughness, good tensile resistance, puncture resistance, friction resistance, high temperature and low temperature resistance, chemical resistance and oil resistance. Anti-aging agents and antioxidants can significantly improve the anti-aging and anti-oxidation properties of the first adhesive and the second adhesive, so that the synthetic mica tape is not prone to stratification after long-term use, the bonding effect is better, and the service life of the synthetic mica tape is increased.

[0004] However, the synthetic mica tape only relies on mica paper and glass fiber cloth to achieve the flame retardant function. This single flame retardant method has limitations, which makes it difficult to achieve the ideal flame retardant effect. When encountering special working conditions such as high temperature and open flame, it cannot provide a sufficiently reliable fire barrier for related facilities and equipment, which leads to a significant reduction in safety protection performance and a significant increase in safety hazards.

[0005] Therefore, it is necessary to provide a synthetic mica tape for wire and cable production and a manufacturing method thereof to solve the above-mentioned technical problems. Summary of the invention

[0006] The invention provides a synthetic mica tape for electric wire and cable production and a manufacturing method thereof, which solves the problem that the flame retardant structure is relatively single, the flame retardant effect is reduced and the safety is reduced.

[0007] In order to solve the above technical problems, the present invention provides a synthetic mica tape for the production of wires and cables, comprising:

[0008] Fiberglass cloth;

[0009] a first adhesive, the first adhesive being disposed on the top of the glass fiber cloth;

[0010] Flame-retardant mica paper, which is arranged on top of the first adhesive;

[0011] A second adhesive, the second adhesive being disposed on top of the flame retardant mica paper;

[0012] A PI film, wherein the PI film is disposed on top of the second adhesive;

[0013] A protective layer is arranged on the top of the PI film.

[0014] Preferably, the first adhesive and the second adhesive are both made of the following components by weight: 4-6 parts of acrylic resin, 0.5-1.5 parts of alcohol ester dodecahydrate, 0.5-1.5 parts of nano aerogel, 1-3 parts of magnesium hydroxide and 0.2-0.6 parts of nano white carbon black.

[0015] Preferably, the protective layer is an anti-ultraviolet coating, and the protective layer is made of phenyl o-hydroxybenzoate.

[0016] In order to solve the above problems, the present invention also provides a method for making a synthetic mica tape for wire and cable production, comprising the following steps:

[0017] S1, mixing organic silica gel, nano-ceramic powder, nano-silicon dioxide and silane coupling agent, stirring for 30-45 minutes at a stirring rate of 700-1000 rpm to obtain a treatment solution;

[0018] S2, 4-6 parts of acrylic resin, 0.5-1.5 parts of alcohol ester twelve, 0.5-1.5 parts of nano aerogel, 1-3 parts of magnesium hydroxide and 0.2-0.6 parts of nano white carbon black are mixed, and stirred for 50-60 minutes at a stirring rate of 1000-1200 rpm to obtain a first adhesive and a second adhesive;

[0019] S3, immersing the mica paper in the treatment solution, treating the mica paper by dipping, and then drying to obtain the treated flame retardant mica paper;

[0020] S3, laminating the treated flame retardant mica paper with the glass fiber cloth by coating;

[0021] S4, treating one side of the mica tape and the glass fiber cloth with a first adhesive by laminating the flame retardant mica paper and the glass fiber cloth in step S3;

[0022] S5, then applying a second adhesive on the side away from the glass fiber cloth, laminating the PI film to the side of the treated mica tape away from the glass fiber cloth, and bonding with the second adhesive;

[0023] S6. Spray an anti-ultraviolet coating on the surface of the PI film, and then dry it to obtain a finished synthetic mica tape. Then, the finished synthetic mica tape is rolled up and cut into synthetic mica tapes of required sizes by a cutting machine.

[0024] Preferably, a mixing device is required in step S2, and the mixing device includes a mixing tank, a discharge valve is fixedly installed at the bottom of the mixing tank, a drive motor is fixedly installed at the top of the mixing tank, a rotating shaft is fixedly installed at the output end of the drive motor, a stirring blade is fixedly installed at the bottom of the rotating shaft, connecting rods are fixedly installed on both sides of the rotating shaft, a scraper is fixedly installed at one end of the connecting rod, and one side of the scraper is attached to the inner side surface of the mixing tank.

[0025] Preferably, a water inlet pipe is fixedly installed on the top of the mixing tank, a solenoid valve is fixedly installed on the input end of the water inlet pipe, and a diverter frame is fixedly installed on the output end of the water inlet pipe.

[0026] Preferably, the diverter frame is fixedly mounted on the inner side of the mixing tank, and a guide frame is fixedly mounted on the bottom of the diverter frame.

[0027] Preferably, a water outlet hole is provided at the bottom of the diverter frame, and the water outlet hole is respectively connected with the inside of the diverter frame and the guide frame.

[0028] Preferably, a plurality of nozzles are fixedly mounted on both the inner side and the outer side of the guide frame.

[0029] Preferably, a feed frame is fixedly installed on the top of the mixing tank, support rods are fixedly installed on all four sides of the mixing tank, and a bottom plate is fixedly installed on the bottom of the support rods.

[0030] Compared with the related art, the synthetic mica tape for wire and cable production and the manufacturing method thereof provided by the present invention have the following beneficial effects:

[0031] The present invention provides a synthetic mica tape for the production of electric wires and cables and a method for making the same. The mica paper is immersed in a treatment solution mixed with organic silica gel, nano-ceramic powder, nano-silicon dioxide and a silane coupling agent, and then dried to obtain the flame-retardant mica paper. In this way, the flame-retardant effect of the produced mica tape can be increased, thereby improving the safety during use.

[0032] Acrylic resin, alcohol ester twelve, nano aerogel, magnesium hydroxide and nano white carbon black are made into a mixed solution to prepare the first adhesive and the second adhesive. Subsequently, the first adhesive is evenly applied to the bottom of the flame retardant mica paper, and the second adhesive is applied to the top of the flame retardant mica paper. Through such double gluing treatment, the flame retardant properties of the mica tape are further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of a preferred embodiment of a synthetic mica tape for the production of wires and cables provided by the present invention;

[0034] Figure 2 A schematic structural diagram of a preferred embodiment of a mixing device for a method for making a synthetic mica tape for electric wire and cable production provided by the present invention;

[0035] Figure 3 for Figure 1 The schematic diagram of the cross-sectional structure of the mixing tank shown;

[0036] Figure 4 for Figure 2 An enlarged schematic diagram of part A is shown.

[0037] Numbers in the figure: 1. glass fiber cloth, 2. first adhesive, 3. flame retardant mica paper, 4. second adhesive, 5. PI film, 6. protective layer, 7. mixing tank, 71. feed frame, 72. discharge valve, 73. support block, 74. support rod, 75. bottom plate, 76. drive motor, 77. rotating shaft, 78. stirring blade, 79. connecting rod, 70. scraper, 8. water inlet pipe, 81. solenoid valve, 82. diverter frame, 83. water outlet hole, 84. guide frame, 85. nozzle. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0039] First embodiment

[0040] Please refer to Figure 1 ,in, Figure 1 A schematic diagram of a preferred embodiment of a synthetic mica tape for the production of wires and cables provided by the present invention. A synthetic mica tape for the production of wires and cables comprises: a glass fiber cloth 1;

[0041] A first adhesive 2, wherein the first adhesive 2 is disposed on the top of the glass fiber cloth 1;

[0042] Flame-retardant mica paper 3, the flame-retardant mica paper 3 is arranged on the top of the first adhesive 2;

[0043] A second adhesive 4, wherein the second adhesive 4 is disposed on the top of the flame retardant mica paper 3;

[0044] A PI film 5, wherein the PI film 5 is disposed on top of the second adhesive 4;

[0045] The protective layer 6 is arranged on the top of the PI film 5 .

[0046] The first adhesive 2 and the second adhesive 4 are both made of the following components by weight: 4-6 parts of acrylic resin, 0.5-1.5 parts of alcohol ester dodecahydrate, 0.5-1.5 parts of nano aerogel, 1-3 parts of magnesium hydroxide and 0.2-0.6 parts of nano white carbon black.

[0047] The protective layer 6 is an anti-ultraviolet coating, and the protective layer 6 is made of phenyl o-hydroxybenzoate.

[0048] In order to solve the above problems, the present invention also provides a method for making a synthetic mica tape for wire and cable production, comprising the following steps:

[0049] S1, mixing organic silica gel, nano-ceramic powder, nano-silicon dioxide and silane coupling agent, stirring for 30-45 minutes at a stirring rate of 700-1000 rpm to obtain a treatment solution;

[0050] S2, 4-6 parts of acrylic resin, 0.5-1.5 parts of alcohol ester twelve, 0.5-1.5 parts of nano aerogel, 1-3 parts of magnesium hydroxide and 0.2-0.6 parts of nano white carbon black are mixed, and stirred for 50-60 minutes at a stirring rate of 1000-1200 rpm to obtain a first adhesive 2 and a second adhesive 4;

[0051] S3, immersing the mica paper in the treatment solution, treating the mica paper by dipping, and then drying to obtain the treated flame retardant mica paper 3;

[0052] S3, laminating the treated flame retardant mica paper 3 with the glass fiber cloth 1 by coating;

[0053] S4, treating the flame retardant mica paper 3 and the glass fiber cloth 1 in step S3 by laminating with the first adhesive 2 on one side of the mica tape and the glass fiber cloth;

[0054] S5, then applying the second adhesive 4 on the side away from the glass fiber cloth 1, laminating the PI film 5 to the side of the treated mica tape away from the glass fiber cloth, and bonding with the second adhesive 4;

[0055] S6, spraying an anti-ultraviolet coating on the surface of the PI film 5, and then drying to obtain a finished synthetic mica tape, then rolling up the finished synthetic mica tape, and then cutting it into synthetic mica tapes of required sizes by a cutting machine.

[0056] Organic silica gel has the characteristics of high and low temperature resistance, electrical insulation, oxidation stability, flame retardancy, corrosion resistance, and heat resistance. It is a good material for preparing heat-resistant mica tape.

[0057] Nano ceramic powder has excellent thermal insulation effect, high temperature resistance, and is not easy to fall off, which can improve the high temperature resistance of organic silica gel;

[0058] Nano-silicon dioxide has good insulation and processing properties, can fill the pores of mica paper, improve the insulation of organic silica gel, and then improve the insulation and heat insulation properties of mica tape;

[0059] Silane coupling agent is used as a binder to evenly mix organic silica gel, nano-ceramic powder and nano-silicon dioxide, and improve the bonding strength, heat resistance and flame retardancy of the system;

[0060] Acrylic resin is the basic raw material for preparing the heat insulation layer treatment liquid, which has good compatibility, gloss retention, color retention and heat reflection and heat insulation effects;

[0061] Alcohol ester is a good film-forming aid, which helps to promote the film formation of acrylic resin;

[0062] Nano aerogel is a solid material with the lowest thermal conductivity. It has excellent visible light transmittance, heat insulation, high temperature resistance, and flame retardancy. It can improve the heat resistance, flame retardancy, and thermal insulation of acrylic resin.

[0063] Magnesium hydroxide has the functions of heat insulation and flame retardancy. It is used as a flame retardant. The residue produced by decomposition, magnesium oxide, is a dense oxide that can be deposited on the surface of the material to inhibit the generation of combustible gas, play a role in heat insulation, oxygen isolation, and achieve the effect of smoke suppression.

[0064] Nano-silica is used as a filler and has strong adhesion and tear resistance. It can be fully and evenly dispersed in acrylic resin, which greatly improves the strength, toughness, ductility and wear resistance of acrylic resin materials, thereby improving the thermal insulation and mechanical properties of mica tape.

[0065] The working principle of a synthetic mica tape for wire and cable production and a manufacturing method thereof provided by the present invention is as follows:

[0066] Mix organic silica gel, nano ceramic powder, nano silicon dioxide and silane coupling agent, stir for 30-45 minutes, and stir at a rate of 700-1000 rpm to obtain a treatment solution; mix 4-6 parts of acrylic resin, 0.5-1.5 parts of alcohol ester twelve, 0.5-1.5 parts of nano aerogel, 1-3 parts of magnesium hydroxide and 0.2-0.6 parts of nano white carbon black, stir for 50-60 minutes, and stir at a rate of 1000-1200 rpm to obtain a first adhesive 2 and a second adhesive 4; immerse mica paper in the treatment solution, treat the mica paper by dipping, and then dry to obtain a treated Flame retardant mica paper 3; laminate the treated flame retardant mica paper 3 with the glass fiber cloth 1 by coating; treat the flame retardant mica paper 3 and the glass fiber cloth 1 by laminating one side of the mica tape with the first adhesive 2; then apply the second adhesive 4 on the side away from the glass fiber cloth 1, laminate the PI film 5 to the side of the treated mica tape away from the glass fiber cloth, and adhere it with the second adhesive 4; spray an anti-ultraviolet coating on the surface of the PI film 5, and then dry it to obtain a finished synthetic mica tape, then roll up the finished synthetic mica tape, and then cut it into synthetic mica tapes of required sizes by a cutting machine.

[0067] Compared with the related art, the synthetic mica tape for wire and cable production and the manufacturing method thereof provided by the present invention have the following beneficial effects:

[0068] The flame retardant mica paper 3 is obtained by immersing the mica paper in a treatment solution mixed with organic silica gel, nano-ceramic powder, nano-silicon dioxide and a silane coupling agent, and then drying the mica paper. This can increase the flame retardant effect of the mica tape produced, thereby improving the safety during use.

[0069] Acrylic resin, alcohol ester twelve, nano aerogel, magnesium hydroxide and nano white carbon black are made into a mixed solution to prepare the first adhesive 2 and the second adhesive 4. Subsequently, the first adhesive 2 is evenly applied to the bottom of the flame retardant mica paper, and the second adhesive 4 is applied to the top of the flame retardant mica paper. Through such double gluing treatment, the flame retardant properties of the mica tape are further enhanced.

[0070] Second embodiment

[0071] Please refer to Figure 2 , Figure 3 and Figure 4 Based on the synthetic mica tape for wire and cable production and its manufacturing method provided in the first embodiment of the present application, the second embodiment of the present application proposes another synthetic mica tape for wire and cable production and its manufacturing method. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0072] Specifically, the second embodiment of the present application provides a synthetic mica tape for the production of wires and cables and a method for producing the same. The difference is that, in the synthetic mica tape for the production of wires and cables and a method for producing the same, a mixing device is required in step S2, and the mixing device includes a mixing tank 7, a discharge valve 72 is fixedly installed at the bottom of the mixing tank 7, a drive motor 76 is fixedly installed at the top of the mixing tank 7, a rotating shaft 77 is fixedly installed at the output end of the drive motor 76, a stirring blade 78 is fixedly installed at the bottom of the rotating shaft 77, connecting rods 79 are fixedly installed on both sides of the rotating shaft 77, a scraper 70 is fixedly installed at one end of the connecting rod 79, and one side of the scraper 70 is attached to the inner side surface of the mixing tank 7.

[0073] A water inlet pipe 8 is fixedly installed on the top of the mixing tank 7 , a solenoid valve 81 is fixedly installed on the input end of the water inlet pipe 8 , and a diverter frame 82 is fixedly installed on the output end of the water inlet pipe 8 .

[0074] The diverter frame 82 is fixedly mounted on the inner side of the mixing tank 7 , and a guide frame 84 is fixedly mounted on the bottom of the diverter frame 82 .

[0075] A water outlet hole 83 is formed at the bottom of the diverter frame 82 , and the water outlet hole 83 is connected to the inside of the diverter frame 82 and the guide frame 84 .

[0076] A plurality of water outlet holes 83 are provided, and water can be dispersed to the inner side surface of the guide frame 84 through the guidance of the water outlet holes 83 , and then sprayed out through the nozzle 85 .

[0077] A plurality of nozzles 85 are fixedly mounted on the inner side and the outer side of the guide frame 84 .

[0078] A feed frame 71 is fixedly installed on the top of the mixing tank 7 , support rods 74 are fixedly installed around the mixing tank 7 , and a bottom plate 75 is fixedly installed on the bottom of the support rods 74 .

[0079] By connecting the support rod 74 and the bottom plate 75 , the support rod 74 and the mixing tank 7 are then connected, so that the mixing tank 7 can be supported.

[0080] The working principle of a synthetic mica tape for wire and cable production and a manufacturing method thereof provided by the present invention is as follows:

[0081] When in use, acrylic resin, alcohol ester twelve, nano aerogel, magnesium hydroxide and nano white carbon black are placed into the inner side of the mixing tank 7 through the feeding frame 71, and then the driving motor 76 is started to drive the rotating shaft 77 to rotate, so that the rotating shaft 77 drives the stirring blade 78 to rotate, so that the stirring blade 78 stirs the materials inside the mixing tank 7. After the stirring is completed, the discharge valve 72 is opened to discharge the materials, and the inner wall of the mixing tank 7 is scraped by the scraper 70, so that the materials adhering to the inner wall of the mixing tank 7 can be scraped off;

[0082] When the inner wall of the mixing tank 7 needs to be cleaned, the solenoid valve 81 can be opened to allow the external water source to enter the inner side of the diversion frame 82 through the solenoid valve 81 and the water inlet pipe 8, and then enter the inner side of the guide frame 84 through the water outlet 83, and then be sprayed out through the nozzle 85, so as to flush the inner wall of the mixing tank 7 and the rotating shaft 77.

[0083] Compared with the related art, the synthetic mica tape for wire and cable production and the manufacturing method thereof provided by the present invention have the following beneficial effects:

[0084] By driving the motor 76, the rotating shaft 77, the stirring blade 78, the connecting rod 79, the scraper 70, the guide frame 84 and the nozzle 85 and other structures to cooperate with each other, after the stirring is completed, the scraper 70 can scrape off the material adhering to the inner wall of the mixing tank 7 to avoid waste of material caused by adhesion, and at the same time, the nozzle 85 can spray water to rinse the inside of the mixing tank 7.

[0085] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A synthetic mica tape for wire and cable production and a method for making the same, characterized in that: include: Fiberglass cloth; a first adhesive, the first adhesive being disposed on the top of the glass fiber cloth; Flame-retardant mica paper, which is arranged on top of the first adhesive; A second adhesive, the second adhesive being disposed on top of the flame retardant mica paper; A PI film, wherein the PI film is disposed on top of the second adhesive; A protective layer is arranged on the top of the PI film.

2. The synthetic mica tape for wire and cable production and the method for making the same according to claim 1, characterized in that: The first adhesive and the second adhesive are both made of the following components by weight: 4-6 parts of acrylic resin, 0.5-1.5 parts of alcohol ester dodecahydrate, 0.5-1.5 parts of nano aerogel, 1-3 parts of magnesium hydroxide and 0.2-0.6 parts of nano white carbon black.

3. The synthetic mica tape for wire and cable production and the method for making the same according to claim 1, characterized in that: The protective layer is an anti-ultraviolet coating, and the protective layer is made of phenyl o-hydroxybenzoate.

4. A method for producing a synthetic mica tape for wire and cable production according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, mixing organic silica gel, nano-ceramic powder, nano-silicon dioxide and silane coupling agent, stirring for 30-45 minutes at a stirring rate of 700-1000 rpm to obtain a treatment solution; S2, 4-6 parts of acrylic resin, 0.5-1.5 parts of alcohol ester twelve, 0.5-1.5 parts of nano aerogel, 1-3 parts of magnesium hydroxide and 0.2-0.6 parts of nano white carbon black are mixed, and stirred for 50-60 minutes at a stirring rate of 1000-1200 rpm to obtain a first adhesive 2 and a second adhesive 4; S3, immersing the mica paper in the treatment solution, treating the mica paper by dipping, and then drying to obtain the treated flame retardant mica paper; S3, laminating the treated flame retardant mica paper with the glass fiber cloth by coating; S4, treating one side of the mica tape and the glass fiber cloth with a first adhesive by laminating the flame retardant mica paper and the glass fiber cloth in step S3; S5, then applying a second adhesive on the side away from the glass fiber cloth, laminating the PI film to the side of the treated mica tape away from the glass fiber cloth, and bonding with the second adhesive; S6. Spray an anti-ultraviolet coating on the surface of the PI film, and then dry it to obtain a finished synthetic mica tape. Then, the finished synthetic mica tape is rolled up and cut into synthetic mica tapes of required sizes by a cutting machine.

5. The method for making a synthetic mica tape for wire and cable production according to claim 1, characterized in that: A mixing device is required in the step S2, and the mixing device includes a mixing tank, a discharge valve is fixedly installed at the bottom of the mixing tank, a driving motor is fixedly installed at the top of the mixing tank, a rotating shaft is fixedly installed at the output end of the driving motor, a stirring blade is fixedly installed at the bottom of the rotating shaft, connecting rods are fixedly installed on both sides of the rotating shaft, a scraper is fixedly installed at one end of the connecting rod, and one side of the scraper is attached to the inner side surface of the mixing tank.

6. The method for making a synthetic mica tape for wire and cable production according to claim 5, characterized in that: A water inlet pipe is fixedly installed on the top of the mixing tank, a solenoid valve is fixedly installed on the input end of the water inlet pipe, and a diversion frame is fixedly installed on the output end of the water inlet pipe.

7. The method for making a synthetic mica tape for electric wire and cable production according to claim 6, characterized in that: The diverter frame is fixedly mounted on the inner side of the mixing tank, and a guide frame is fixedly mounted on the bottom of the diverter frame.

8. The method for making a synthetic mica tape for electric wire and cable production according to claim 7, characterized in that: A water outlet hole is provided at the bottom of the diversion frame, and the water outlet hole is respectively connected with the inside of the diversion frame and the guide frame.

9. The method for making a synthetic mica tape for electric wire and cable production according to claim 8, characterized in that: A plurality of nozzles are fixedly mounted on the inner side and the outer side of the guide frame.

10. The method for making a synthetic mica tape for electric wire and cable production according to claim 9, characterized in that: A feeding frame is fixedly installed on the top of the mixing tank, support rods are fixedly installed around the mixing tank, and a bottom plate is fixedly installed at the bottom of the support rods.

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