CN111497385A - Mica tape preparation method and mica tape - Google Patents
Mica tape preparation method and mica tape Download PDFInfo
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- CN111497385A CN111497385A CN202010329598.4A CN202010329598A CN111497385A CN 111497385 A CN111497385 A CN 111497385A CN 202010329598 A CN202010329598 A CN 202010329598A CN 111497385 A CN111497385 A CN 111497385A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
- B32B19/06—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
- B32B19/04—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
- B32B19/04—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to another layer of the same or of a different material
- B32B19/045—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
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- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
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- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
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- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
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- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Adhesive Tapes (AREA)
Abstract
The invention provides a mica tape and a preparation method thereof, wherein the preparation method comprises the following steps: the emulsion type organic silicon pressure-sensitive adhesive is used for sizing and wetting the reinforcing material; compounding with mica paper, drying and curing. The materials in the mica tape are bonded by using the emulsion type organic silicon pressure sensitive adhesive, so that the bonding effect is good; in addition, no organic solvent exists in the process from glue application to final coiling of the prepared mica tape, explosion and personal safety hazards do not exist in glue preparation and glue application, glue application solvent recovery is not needed, and the major fixed asset investment of solvent recovery is avoided.
Description
Technical Field
The invention relates to the field of wires and cables, in particular to a mica tape preparation method and a mica tape.
Background
The mica tape is an insulating material formed by baking, drying and cutting a reinforcing material such as mica paper, glass fiber cloth and the like together with a proper adhesive, has excellent high-temperature resistance and combustion resistance, has good flexibility in a normal state, and is suitable for fire-resistant insulating layers of various fire-resistant electromagnetic cables and coils. However, the following disadvantages exist in preparing mica tapes: (1) in the preparation process, the preparation raw materials are single and can not be fused with various raw materials, so that the mica tape has poor performances; (2) the flame retardance is not strong, the flame diffusion range is wide during combustion, the generated smoke quantity is large, and the texture processing can not be well carried out on the composite material cable; (3) in the drying process of the mica paper, the mica paper is not uniformly dried, and the drying quality is relatively low.
In addition, the mica tape adhesive with the largest dosage at present adopts epoxy resin or modified resin thereof as the adhesive, and adopts solvent-type organic silicon adhesive. The epoxy resin and the modified resin binder thereof can generate strong black smoke when exposed to open fire, and combustion decomposition products of the epoxy resin and the modified resin binder are carcinogenic and highly polluting, so that the epoxy resin and the modified resin binder are easy to suffocate people in fire and can also generate harm to the environment and human bodies.
Disclosure of Invention
In order to solve the technical problems, the invention provides a mica tape preparation method and a mica tape.
The embodiment of the invention provides a mica tape preparation method and a mica tape, which can realize the compounding of various materials of the mica tape and improve the performance.
In one aspect, a method for preparing a mica tape is provided, which comprises the following steps: the emulsion type organic silicon pressure-sensitive adhesive is used for sizing and wetting the reinforcing material; compounding with mica paper, drying and curing.
Further, the wetting comprises: mixing 1-5 parts of the organic silicon pressure sensitive adhesive, 2-10 parts of water and 0.0005% -0.002% of platinum emulsion to form a first solution, and infiltrating the reinforcing material by using the first solution.
Further, the glue applying is one of crack glue applying, rubber roll glue applying, glue spraying and glue dipping.
Further, the reinforcing material is a fiber cloth or a film.
Further, the compounding rate is such that the wetted reinforcement material is compounded with the mica paper under a press roll at a vehicle speed of 1-10m/min, preferably 2-7 m/min.
Further, the reinforcing material also comprises a surface treatment, wherein the surface treatment is a coupling agent reinforcing treatment or a plasma surface treatment, or a conventional fiber yarn treatment.
Further, the reinforcing material is one or a combination of several of non-woven cloth, glass fiber cloth, aramid fiber cloth, basalt fiber cloth, glass felt, polyester cloth, fiber blended cloth, a unidirectional/bidirectional stretching polyethylene film, unidirectional/bidirectional stretching polyethylene terephthalate, a polyimide film and a polytetrafluoroethylene film.
On the other hand, the mica tape is characterized by comprising a reinforcing material layer, an organic silicon pressure-sensitive adhesive layer and a mica paper layer.
Further comprises a reinforcing fiber cloth layer, an organic silicon pressure-sensitive adhesive layer, a mica paper layer, an organic silicon pressure-sensitive adhesive layer and a reinforcing film material layer.
Further, the mica paper layer comprises a reinforcing material layer, an organic silicon pressure sensitive adhesive layer, a mica paper layer, an organic silicon pressure sensitive adhesive layer and the reinforcing material layer.
The preparation method of the mica tape is simple and convenient; meanwhile, the prepared mica tape is compounded with various materials, and has excellent performance, high breakdown strength and high tensile strength.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
An embodiment of the present invention provides a method for preparing a mica tape, including: the emulsion type organic silicon pressure-sensitive adhesive is used for sizing and wetting the reinforcing material; compounding with mica paper, drying and curing.
The materials in the mica tape are bonded by using the emulsion type organic silicon pressure sensitive adhesive, so that the bonding effect is good; can realize the compounding of multilayer materials, has excellent performance and stronger breakdown strength and higher tensile strength. In addition, no organic solvent exists in the process from glue application to final coiling of the prepared mica tape, explosion and personal safety hazards do not exist in glue preparation and glue application, glue application solvent recovery is not needed, and the major fixed asset investment of solvent recovery is avoided.
In an alternative embodiment, the emulsion silicone is prepared by a process,
(1) preparation of Silicone resins
Adding 200kg of hexamethyldisiloxane, 500kg of ethyl silicate and 10kg of concentrated sulfuric acid into a reaction kettle, uniformly mixing in a water bath at 20 ℃, stirring at a high speed, dropwise adding deionized water at the speed of 2L/min, completing dropwise adding within 1 hour, stirring for half an hour after completing dropwise adding, heating to 80 ℃, performing reflux reaction for 4 hours, removing by-products by evaporation, adding ammonia water for neutralization to neutrality, adding about 500kg of toluene, and adjusting the solid content to 50%.
(2) Preparing oily organic silicon pressure-sensitive adhesive by using organic silicon resin
Cooling the reactants to 60 ℃, adding 250kg of 107 silicone rubber (with molecular weight of 80 ten thousand and vinyl content of 0.55%), 5kg of vinyl trimethoxy silane and 200g of triethanolamine, stirring and mixing uniformly, heating to 110 ℃ for reaction for 4 hours, evaporating part of solvent, adjusting solid content to 65%, cooling and discharging;
(3) mixing the oily organic silicon pressure-sensitive adhesive with an emulsifier
Adding 2.5kg of BP-20 and 70kg of deionized water into an emulsifying machine, and shearing to form a first thick phase; 2.5kg of BP-20 and 300kg of the oily organic silicon pressure sensitive adhesive obtained above are mixed and sheared, 78kg of water is added to form a second thick phase; mixing the two thick phases; then adding 1.5kg of meteorological silica and 52kg of deionized water, emulsifying to a uniform phase, transferring to a reduced pressure distillation kettle, heating, distilling under reduced pressure to remove toluene, cooling, supplementing water until the solid content is 60%, uniformly stirring, and discharging. The product is not deteriorated after being placed for 6 months. The emulsion pressure-sensitive adhesive prepared by mixing the two thick phases has more uniform finished product, smaller history and better adhesive force. The particle diameter of the direct and complete mixing method is 0.5-1 micron, the peeling force is 4-5N/cm), the peeling force of the emulsion type pressure sensitive agent mixed by two thick phases is more than 6N/cm, and the particle diameter is 0.1-0.5 micron. The adhesive force can be further improved by adding the nano silicon dioxide, the peeling force of the emulsion type pressure sensitive agent without adding the silicon dioxide is 3.5-4.5N/cm, and the peeling force of the emulsion type pressure sensitive agent with adding the silicon dioxide is more than 5N/cm.
The particle size of the emulsion pressure sensitive adhesive was tested to be 0.2 micron in Malvern 3000; the peel force was 6N/cm.
In another alternative embodiment, the emulsion silicone is prepared by the following method:
(1) preparation of emulsion type MQ resin
Adding 200kg of hexamethyldisiloxane, 500kg of ethyl silicate and 10kg of concentrated sulfuric acid into a reaction kettle, uniformly mixing in a water bath at the temperature of 20 ℃, stirring at a high speed, dropwise adding deionized water at the speed of 2L/min, dropwise adding for 1 hour, stirring for half an hour after dropwise adding, heating to 80 ℃, refluxing for reaction for 4 hours, evaporating to remove byproducts, adding ammonia water for neutralization to neutrality, adding about 500kg of toluene, adding 1.5kg of BP-20 and 50kg of deionized water into an emulsifying machine, shearing to form a first thick phase, mixing 1.5kg of BP-20 with 300kg of the obtained oily MQ resin, shearing, adding 78kg of water to form a second thick phase, mixing the two thick phases, adding 72kg of deionized water, emulsifying to form a uniform phase, transferring to a reduced pressure distillation kettle, heating, distilling under reduced pressure to remove toluene, cooling, supplementing water until the solid content is 60%, uniformly stirring, and discharging the emulsion with the shelf life of more than 6 months.
(2) Preparation of emulsion type Silicone rubber
100 parts of terminal alkenyl polymethyl/alkenyl siloxane (the alkenyl content is 0.1-5 percent), 1-50 parts of hydrogen-containing polymethyl siloxane (the hydrogen content is 0.01-0.5 percent), 0.5-5 parts of BP-20 and 240 parts of water, 1-5 parts of alkenyl silane coupling agent, 1 part of hydrogen chain active passivator alkynyl methylsiloxane and 0.05-0.5 part of sorbic acid as catalysts, and the components are mixed and stirred in a homogenizer to form uniform emulsion; the emulsion has a shelf life of more than 1 year.
(3) Preparation of emulsion type organic silicon pressure-sensitive adhesive by using 2 kinds of emulsions
The emulsions (1) and (2) prepared above were mixed in a weight ratio of 0.5 to 2, and the catalyst vinylsiloxane-platinum complex: water-2: 1 emulsion. After the three emulsions are uniformly stirred, sizing is carried out, and the prepared glue solution is used up within 1 day.
In an alternative embodiment, the wetting comprises: mixing 1-5 parts of the organic silicon pressure sensitive adhesive, 2-10 parts of water and 0.0005% -0.002% of platinum emulsion to form a first solution, and infiltrating the reinforcing material by using the first solution to realize wetting. The soaking time is 10 to 60 minutes, preferably 20 to 30 minutes, and more preferably 25 minutes.
The mica tape prepared by adopting the proportion and the parameters has the tensile strength of more than 200N/cm and the breakdown strength of 5kV/layer
Optionally, as another embodiment, the sizing is one of slot sizing, glue roller sizing, glue pouring, glue spraying, and glue dipping. Preferably, the slot sizing is performed.
The glue is applied more uniformly by adopting the method, and the quality of the mica tape can be improved.
Alternatively, as another embodiment, the reinforcing material is a fiber cloth, such as one or a combination of several of a non-woven cloth, a glass fiber cloth, an aramid fiber cloth, a basalt fiber cloth, a glass felt, a polyester cloth, a fiber blended cloth, and the like, and preferably the glass fiber cloth and the basalt fiber cloth.
The reinforcing materials are selected, so that the raw materials are easily available and the cost is low.
Alternatively, as another embodiment, the reinforcing material is a film, such as one or a combination of several of a unidirectional/bidirectional stretched polyethylene film (PE film), a unidirectional/bidirectional stretched polyethylene terephthalate (PET film), a polyimide film (PI film), a polytetrafluoroethylene film (PTFE film), and the like, preferably a PI film and a PTFE film.
Further, the surface of the reinforcing material is subjected to treatment, such as coupling agent reinforcing treatment, or plasma surface treatment, or conventional fiber yarn treatment.
Alternatively, as another example, the wetted reinforcement material is compounded with mica paper under a press roll at a vehicle speed of 1-10m/min, preferably 2-5 m/min.
In another embodiment, the preparation method of the mica tape further comprises drying and curing treatment, rolling, slitting and winding.
Further, the drying tunnel is provided with a temperature zone not lower than 2 sections, preferably 3-6 temperature zones, more preferably 4-5 temperature zones; the temperature distribution is from 70 ℃ to 200 ℃, preferably from 80 ℃ to 180 ℃; more preferably, the temperature zone is 1:90 +/-10 ℃; the temperature zone is 2:105 +/-10 ℃; the temperature zone is 3:130 +/-10 ℃; the temperature zone is 4:150 +/-10 ℃, and the temperature zone is 5:170 +/-10 ℃.
By adopting the drying method, a plurality of temperature zones are arranged in the drying process of the mica paper, and the hot air can be fully contacted with the mica sheets, so that the mica paper is dried uniformly and the drying quality is higher.
The invention provides a mica tape, which comprises a single-sided mica tape and a double-sided mica tape, wherein the single-sided mica tape and the double-sided mica tape are composed of a reinforcing fiber cloth layer, an emulsion type organic silicon pressure-sensitive adhesive, a mica paper layer, an organic silicon pressure-sensitive adhesive layer and a reinforcing thin film material layer.
Specifically, the mica tape comprises the following combinations:
1) glass fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer and mica paper;
2) glass fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and glass fiber cloth;
3) aramid fiber cloth, an emulsion type organic silicon pressure-sensitive adhesive layer and mica paper;
4) aramid fiber cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and aramid fiber cloth;
5) basalt fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer and mica paper;
6) basalt fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and basalt fiber cloth;
7) glass felt, an emulsion type organic silicon pressure-sensitive adhesive layer and mica paper;
8) glass mat, emulsion type organic silicon pressure sensitive adhesive layer, mica paper, emulsion type organic silicon pressure sensitive adhesive layer and glass mat;
9) the blended fiber cloth, the emulsion type organic silicon pressure sensitive adhesive layer and the mica paper are mixed;
10) the blended fiber cloth, the emulsion type organic silicon pressure sensitive adhesive layer, the mica paper, the emulsion type organic silicon pressure sensitive adhesive layer and the blended fiber cloth are sequentially arranged;
11) PE film, emulsion type organic silicon pressure sensitive adhesive layer and mica paper;
12) the adhesive comprises a PE film, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PE film;
13) PET film, emulsion type organic silicon pressure sensitive adhesive layer and mica paper;
14) the adhesive comprises a PET film, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PET film;
15) PI film, emulsion type organic silicon pressure sensitive adhesive layer and mica paper;
16) PI film, emulsion type organic silicon pressure sensitive adhesive layer, mica paper, emulsion type organic silicon pressure sensitive adhesive layer and PI film;
17) PTFE film, emulsion type organic silicon pressure sensitive adhesive layer and mica paper;
18) the adhesive comprises a PTFE film, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PTFE film;
19) polyester fabric, an emulsion type organic silicon pressure-sensitive adhesive layer and mica paper;
20) terylene cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and terylene cloth;
another embodiment of the present invention provides a mica tape, which comprises a three-in-one mica tape, a four-in-one mica tape, a five-in-one mica tape, a six-in-one mica tape, and the like, wherein the three-in-one mica tape, the four-in-one mica tape, the five-in-one mica tape, and the six-in-one mica tape are composed of a reinforcing fiber cloth layer, an emulsion type silicone pressure sensitive adhesive layer, a mica paper layer, an emulsion type silicone pressure sensitive adhesive layer, a reinforcing film material layer, and the like, and.
Specifically, the mica tape comprises the following combinations:
1) glass fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PE film;
2) glass fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PET film;
3) glass fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PI film;
4) glass fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PTFE film;
5) aramid fiber cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PE film;
6) aramid fiber cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PET film;
7) aramid fiber cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PI film;
8) aramid fiber cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PTFE (polytetrafluoroethylene) film;
9) basalt fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PE film;
10) basalt fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PET film;
11) basalt fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PI film;
12) basalt fiber cloth, an emulsion type organic silicon pressure sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure sensitive adhesive layer and a PTFE film;
13) glass mat, emulsion type organic silicon pressure sensitive adhesive layer, mica paper, emulsion type organic silicon pressure sensitive adhesive layer and PE film;
14) glass mat, emulsion type organic silicon pressure sensitive adhesive layer, mica paper, emulsion type organic silicon pressure sensitive adhesive layer and PET film;
15) glass mat, emulsion type organic silicon pressure sensitive adhesive layer, mica paper, emulsion type organic silicon pressure sensitive adhesive layer and PI film;
16) glass mat, emulsion type organic silicon pressure sensitive adhesive layer, mica paper, emulsion type organic silicon pressure sensitive adhesive layer and PTFE film;
17) the blended fiber cloth, the emulsion type organic silicon pressure sensitive adhesive layer, the mica paper, the emulsion type organic silicon pressure sensitive adhesive layer and the PE film are sequentially arranged;
18) the blended fiber cloth, the emulsion type organic silicon pressure sensitive adhesive layer, the mica paper, the emulsion type organic silicon pressure sensitive adhesive layer and the PET film are sequentially arranged;
19) the blended fiber cloth, the emulsion type organic silicon pressure sensitive adhesive layer, the mica paper, the emulsion type organic silicon pressure sensitive adhesive layer and the PI film are sequentially arranged;
20) the blended fiber cloth, the emulsion type organic silicon pressure sensitive adhesive layer, the mica paper, the emulsion type organic silicon pressure sensitive adhesive layer and the PTFE film are sequentially arranged;
21) terylene cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PTFE film;
22) terylene cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PE film;
23) polyester fabric, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PET film;
24) terylene cloth, an emulsion type organic silicon pressure-sensitive adhesive layer, mica paper, an emulsion type organic silicon pressure-sensitive adhesive layer and a PI film;
another embodiment of the present invention provides a mica tape, which includes a reinforcing material layer, an emulsion-type silicone pressure-sensitive adhesive layer, a mica paper layer, an emulsion-type silicone pressure-sensitive adhesive layer, and the reinforcing material layer.
Specifically, in the composite structure of the mica tape, the reinforcing materials are the same, such as glass fiber cloth, emulsion type organosilicon pressure sensitive adhesive layer, mica paper, emulsion type organosilicon pressure sensitive adhesive layer, glass fiber cloth or basalt fiber cloth, emulsion type organosilicon pressure sensitive adhesive layer, mica paper, emulsion type organosilicon pressure sensitive adhesive layer and basalt fiber cloth.
In another embodiment, the mica tape may continue to be stacked units combined in the three forms described above.
The mica tape prepared by the method has tensile strength of more than 200N/cm and breakdown strength of more than 5 kV/layer. The mica tape using the general adhesive has the tensile strength of 100-160N/cm and the breakdown strength of 2-4 kV/layer.
In another embodiment, the prepared mica tape can be used for motor insulation, wire and cable insulation and fire protection of optical fiber cables.
In a preferred embodiment, 100kg of the emulsion type silicone pressure-sensitive adhesive is taken, 200kg of deionized water and 0.001% of platinum emulsion (based on the solid content of the silicone) are added, the mixture is uniformly stirred and pumped into a gap, a glass fiber cloth which is reinforced by a silane coupling agent and is 28g/m2 quantitatively advances through the gap sizing at the speed of 4m/min, the glass fiber cloth is compounded with calcined gold mica paper with the quantitative of 140g/m2, and the mixture is dried by 5 sections of drying channels at 90 ℃, 105 ℃, 120 ℃, 140 ℃ and 180 ℃ respectively to obtain an uncoated green tape; adding 42650.1kg of photoinitiator into the emulsion, uniformly mixing, coating the mixture on a biaxially oriented polyethylene film with the weight of 18g/m2 through a rubber roll, passing through a 60 ℃ oven, then compounding the film with an uncoated embryonic tape through a roll, baking the film in the 60 ℃ oven, curing the film through an ultraviolet curing machine, rolling the film, and cutting the film into a three-in-one mica tape with the width of 6 mm. The tensile strength was 210N/cm, and the breakdown strength was 6 kV/layer.
Comparative example 1
The reinforcing material is applied with glue and wetted by using the non-emulsion type organic silicon pressure sensitive adhesive, and other steps are the same as the best embodiment. The mica tape was tested to have a tensile strength of 108N/cm and a breakdown strength of 2.2 kV/layer.
Comparative example 2
The drying process adopts constant temperature drying, and other steps are the same as the best embodiment. The mica tape was tested to have a tensile strength of 139N/cm and a breakdown strength of 3.1 kV/layer.
Comparative example 3
The adopted wetting parameters are different from those of the preferred embodiment and other embodiments, and other steps are the same as those of the preferred embodiment. The mica tape was tested to have a tensile strength of 141N/cm and a breakdown strength of 3.2 kV/layer.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A preparation method of a mica tape is characterized by comprising the following steps:
the emulsion type organic silicon pressure-sensitive adhesive is used for sizing and wetting the reinforcing material;
compounding with mica paper, drying and curing.
2. The method of manufacturing according to claim 1, wherein the wetting comprises: mixing 1-5 parts of the organic silicon pressure sensitive adhesive, 2-10 parts of water and 0.0005% -0.002% of platinum emulsion to form a first solution, and infiltrating the reinforcing material by using the first solution.
3. The method of claim 2, wherein the sizing is one of slot sizing, glue roller sizing, glue pouring, glue spraying and glue dipping.
4. The method according to claim 1, wherein the reinforcing material is a fiber cloth or a film.
5. The method of claim 1, wherein the compounding rate is such that the wetted reinforcement material is compounded with the mica paper under a press roll at a vehicle speed of 1-10m/min, preferably 2-7 m/min.
6. The method of claim 1, wherein the reinforcing material further comprises a surface treatment, wherein the surface treatment is a coupling agent reinforcing treatment or a plasma surface treatment, or a conventional fiber yarn treatment.
7. The preparation method according to claim 4, wherein the reinforcing material is one or more of a combination of non-woven cloth, glass fiber cloth, aramid fiber cloth, basalt fiber cloth, glass mat, polyester cloth, fiber blended cloth, unidirectional/bidirectional stretched polyethylene film, unidirectional/bidirectional stretched polyethylene terephthalate, polyimide film and polytetrafluoroethylene film.
8. A mica tape produced by the production method according to any one of claims 1 to 7, comprising a reinforcing material layer, an emulsion-type silicone pressure-sensitive adhesive layer and a mica paper layer.
9. The mica tape according to claim 8, which comprises a reinforcing fiber cloth layer, an emulsion type silicone pressure-sensitive adhesive layer, a mica paper layer, an emulsion type silicone pressure-sensitive adhesive layer and a reinforcing film material layer.
10. The mica tape according to claim 9, comprising a reinforcing material layer, an emulsion-type silicone pressure-sensitive adhesive layer, a mica paper layer, an emulsion-type silicone pressure-sensitive adhesive layer, and the reinforcing material layer.
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