CN112048208A - Fireproof insulating coating and preparation method thereof - Google Patents
Fireproof insulating coating and preparation method thereof Download PDFInfo
- Publication number
- CN112048208A CN112048208A CN202010975741.7A CN202010975741A CN112048208A CN 112048208 A CN112048208 A CN 112048208A CN 202010975741 A CN202010975741 A CN 202010975741A CN 112048208 A CN112048208 A CN 112048208A
- Authority
- CN
- China
- Prior art keywords
- adhesive tape
- pair wheel
- conveying pair
- polyamide
- cutter shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- 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
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/308—Wires with resins
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Paints Or Removers (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention relates to the technical field of coatings, in particular to a fireproof insulating coating and a preparation method thereof, the insulating coating is formed by mixing a polyamide-imide resin coating and an organic silicon sol, the polyamide-imide resin coating comprises a solvent and polyamide-imide resin, the organic silicon sol comprises 20-30% of adhesive tape objects in parts by weight, the adhesive tape objects comprise two adhesive tape bodies and uniformly dispersed silicon dioxide particles, the adhesive tape bodies are prepared by drying a base cloth and an emulsion adhesive layer coated on the base cloth, the base cloth faces outwards when the two adhesive tape bodies are adhered, and the emulsion adhesives are adhered and adhered to form a whole. According to the invention, the adhesive tape body in the adhesive tape object is used as a carrier to carry the silicon dioxide particles, the adhesive tape object is uniformly dispersed through a mixing process to realize the dispersion uniformity of the silicon dioxide particles, the fireproof insulation requirement is met, and the toughness of the insulation film can be greatly increased.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a fireproof insulating coating and a preparation method thereof.
Background
In recent years, inverter control of electric appliances at high voltage and high current has been widely performed in response to demands for downsizing, high performance, energy saving, and the like of the electric appliances. In this case, a high inversion surge voltage is often generated in the electric appliance due to the inverter control, and when such an inversion surge voltage is generated, there is a possibility that an adverse effect is exerted on an insulation system of a coil in the electric appliance. In particular, in an insulated wire used for a coil, partial discharge occurs mainly between wires or between ground, and this partial discharge causes erosion of an insulating film and dielectric breakdown. As an insulated wire used for a coil of such an electric appliance, an insulated wire having one or more layers of an insulating coating formed by applying and baking an insulating paint prepared by dissolving a polyimide resin, a polyamideimide resin, a polyesterimide resin, or the like in a solvent around a conductor having a circular cross section is used. The traditional insulating paint has the problems that the dispersibility of silicon dioxide particles is poor, and the coating property of the traditional insulating paint on conductors with quadrilateral sections is not good enough.
To this end, patent specification CN102206464B discloses an insulating coating material having excellent dispersibility of silica fine particles and coatability with respect to a conductor having a quadrangular cross section, the insulating coating material being formed by mixing a polyamideimide resin coating material containing a solvent and a polyamideimide resin with an organic silica sol used for an insulated wire having an insulating film provided on a conductor having a quadrangular cross section, wherein the organic silica sol is prepared by dispersing silica fine particles in a dispersion solvent containing a cyclic ketone having a boiling point in the range of 130 to 180 ℃ in a proportion of 70 to 100% by weight, and an insulated wire having an insulating film formed by using the insulating coating material.
However, the insulating coating still has the defects that the dispersion uniformity of silicon dioxide particles is not ideal, and the toughness of an insulating coating is poor. Therefore, optimization improvements are needed.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a fireproof insulating coating and a preparation method thereof.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
the insulating coating is formed by mixing polyamide imide resin coating and organic silicon sol, wherein the polyamide imide resin coating comprises solvent and polyamide imide resin, the organic silicon sol comprises 20-30% of adhesive tape objects in parts by weight, the adhesive tape objects comprise two layers of adhesive tape bodies and silicon dioxide particles uniformly dispersed between the two layers of adhesive tape bodies, the adhesive tape bodies are prepared by drying base cloth and an emulsion adhesive layer coated on the base cloth, the base cloth faces outwards when the two layers of adhesive tape bodies are adhered, and emulsion adhesion is mutually adhered and adhered into a whole.
Further, in the fireproof insulating coating, the dispersion solvent of the organic silica sol is cyclic ketone with a boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone.
Further, in the fire-retardant insulating paint, the polyamideimide resin paint is formed by dissolving the polyamideimide resin in a solvent containing a cyclic ketone having a boiling point in the range of 130 ℃ to 180 ℃, and the cyclic ketone contains at least one of cycloheptanone, cyclohexanone and cyclopentanone.
Further, in the fireproof insulating coating, the proportion of the organic silica sol in the polyamide-imide resin is 30-40% by weight.
Further, in the fireproof insulating coating, the base cloth in the adhesive tape body is made of glass fiber.
Further, in the fireproof insulating coating, the emulsion adhesion layer in the adhesive tape body is a teflon emulsion layer.
Further, in the fireproof insulating coating, the adhesive tape body is formed by manufacturing a whole adhesive tape body by a forming device, and then longitudinally and transversely cutting the whole adhesive tape body.
Further, in the fireproof insulating coating, the forming device comprises a silica hopper, a front conveying pair wheel, a rear conveying pair wheel, a longitudinal slitting blade and a hobbing cutter shaft, the silica hopper is positioned in the middle area of the non-joint part of the adhesive tape I and the adhesive tape II, the front conveying pair wheel and the rear conveying pair wheel are respectively positioned at two sides of the joint part of the adhesive tape I and the adhesive tape II, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel and the rear conveying pair wheel, and the longitudinal slitting blade is arranged between the front conveying pair wheel and the rear conveying pair wheel side by side; the rolling cutter shaft is positioned at the rear side of the rear conveying paired wheel, the joint part of the adhesive tape I and the adhesive tape II forms a plurality of strip parts through a longitudinal slitting blade, and the strip parts form each adhesive tape object through the cutting action of the rolling cutter shaft.
Furthermore, in the fireproof insulating paint, the length of the adhesive tape object is 0.1-1cm, and the width of the adhesive tape object is 1/10-1/3 of the length.
A preparation method of a fireproof insulating coating comprises the following steps:
1) preparing a rubber belt material by utilizing a forming device, wherein the forming device comprises a silicon dioxide hopper, a front conveying pair wheel, a rear conveying pair wheel, a longitudinal slitting blade and a hobbing cutter shaft, the silicon dioxide hopper is positioned in the middle area of the non-joint part of the rubber belt I and the rubber belt II, the front conveying pair wheel and the rear conveying pair wheel are respectively positioned at two sides of the joint part of the rubber belt I and the rubber belt II, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel and the rear conveying pair wheel, and the longitudinal slitting blade is arranged between the front conveying pair wheel and the rear conveying pair wheel side by side; the rolling cutter shaft is positioned at the rear side of the rear conveying paired wheel, the joint part of the adhesive tape I and the adhesive tape II forms a plurality of strip parts through a longitudinal slitting blade, and the strip parts form each adhesive tape object through the cutting action of the rolling cutter shaft;
2) mixing the adhesive tape material with a dispersing solvent to prepare an organic silica sol, wherein the adhesive tape material accounts for 20-30 wt%, the dispersing solvent is a cyclic ketone with a boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone;
3) mixing polyamide-imide resin coating and organic silicon sol to prepare insulating coating, wherein the organic silicon sol accounts for 30-40% by weight, the polyamide-imide resin coating is formed by dissolving the polyamide-imide resin in a solvent containing cyclic ketones with boiling points within the range of 130-180 ℃, and the cyclic ketones comprise at least one of cycloheptanone, cyclohexanone and cyclopentanone.
The invention has the beneficial effects that:
1. the silicon dioxide particle dispersion device is scientific and reasonable in structural design, the adhesive tape body in the adhesive tape object is used as a carrier to carry the silicon dioxide particles, the adhesive tape object is uniformly dispersed through a mixing process to realize the dispersion uniformity of the silicon dioxide particles, the fireproof insulation requirement is met, and meanwhile, the toughness of the insulating film can be greatly improved.
2. The insulating coating of the invention is difficult to flow from the corner part of the conductor to the flat part due to the resistance action of the inner rubber belt part, thereby avoiding the occurrence of the phenomenon that the thickness of the insulating coating on the corner part is thinner than that of the flat part, and having better coating performance.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a molding apparatus according to the present invention;
FIG. 2 is a schematic top view of a portion of the forming apparatus of the present invention;
FIG. 3 is a schematic cross-sectional view of a wire according to an embodiment of the present invention;
in the figure: 1-adhesive tape I, 2-adhesive tape II, 3-silicon dioxide hopper, 4-front conveying paired wheel, 5-rear conveying paired wheel, 6-longitudinal slitting blade, 7-rolling cutter shaft, 8-adhesive tape object and 9-conductor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
This example provides a flameproof insulating coating material used for an insulated wire in which an insulating film is provided on a conductor 9 having a square cross section, the insulating coating material being formed by mixing a polyamideimide resin coating material containing a solvent and a polyamideimide resin and a silicone sol.
In this example, the polyamideimide resin coating is formed by dissolving a polyamideimide resin in a solvent containing a cyclic ketone having a boiling point in the range of 130 ℃ to 180 ℃, the cyclic ketone containing at least one of cycloheptanone, cyclohexanone and cyclopentanone.
In this example, the proportion of the silicone sol in the polyamideimide resin was 35% by weight. The organic silica sol comprises 25 weight percent of adhesive tape 8, the dispersion solvent of the organic silica sol is cyclic ketone with the boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone.
In this embodiment, the adhesive tape 8 includes two adhesive tape bodies and silica particles uniformly dispersed between the two adhesive tape bodies, the adhesive tape body is made of a base cloth and an emulsion adhesive layer coated thereon after drying, the base cloth faces outward when the two adhesive tape bodies are adhered, and the emulsion adhesive layers are adhered and adhered to each other to form a whole. The base cloth in the adhesive tape body is made of glass fiber, and the emulsion adhesion layer in the adhesive tape body is a Teflon emulsion layer.
In this embodiment, the adhesive tape body is formed by first forming a whole adhesive tape body by the forming device, and then longitudinally and transversely cutting the whole adhesive tape body. The forming device comprises a silica hopper 3, a front conveying pair wheel 4, a rear conveying pair wheel 5, a longitudinal slitting blade 6 and a hobbing cutter shaft 7, wherein the silica hopper 3 is positioned in the middle area of the non-joint part of the adhesive tapes I1 and II2, the front conveying pair wheel 4 and the rear conveying pair wheel 5 are respectively positioned at two sides of the joint part of the adhesive tapes I1 and II2, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel 4 and the rear conveying pair wheel 5, and the longitudinal slitting blade 6 is arranged between the front conveying pair wheel 4 and the rear conveying pair wheel 5 side by side; the rolling cutter shaft 7 is positioned at the rear side of the rear conveying pair wheel 5, the joint parts of the adhesive tapes I1 and II2 form a plurality of strip parts through the longitudinal slitting blade 6, and the strip parts form each adhesive tape object 8 through the cutting action of the rolling cutter shaft 7.
In this example, the length of the tape 8 is 0.5cm, and the width thereof is 1/5.
The preparation method of the fireproof insulating coating comprises the following steps:
1) preparing a rubber belt material by using a forming device, wherein the forming device comprises a silica hopper 3, a front conveying pair wheel 4, a rear conveying pair wheel 5, a longitudinal slitting blade 6 and a hobbing cutter shaft 7, the silica hopper 3 is positioned in the middle area of the non-joint part of the rubber belts I1 and II2, the front conveying pair wheel 4 and the rear conveying pair wheel 5 are respectively positioned at two sides of the joint part of the rubber belts I1 and II2, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel 4 and the rear conveying pair wheel 5, and the longitudinal slitting blade 6 is arranged between the front conveying pair wheel 4 and the rear conveying pair wheel 5 side by side; the rolling cutter shaft 7 is positioned at the rear side of the rear conveying pair wheel 5, the joint parts of the adhesive tape I1 and the adhesive tape II2 form a plurality of strip parts through the longitudinal slitting blade 6, and the strip parts form each adhesive tape object 8 through the cutting action of the rolling cutter shaft 7;
2) mixing the adhesive tape material with a dispersing solvent to prepare an organic silica sol, wherein the adhesive tape material accounts for 25% by weight, the dispersing solvent is a cyclic ketone with a boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone;
3) the polyamide-imide resin coating is formed by dissolving polyamide-imide resin in a solvent containing cyclic ketones with boiling points within the range of 130-180 ℃, wherein the cyclic ketones comprise at least one of cycloheptanone, cyclohexanone and cyclopentanone.
Example two
This example provides a flameproof insulating coating material used for an insulated wire in which an insulating film is provided on a conductor 9 having a square cross section, the insulating coating material being formed by mixing a polyamideimide resin coating material containing a solvent and a polyamideimide resin and a silicone sol.
In this example, the polyamideimide resin coating is formed by dissolving a polyamideimide resin in a solvent containing a cyclic ketone having a boiling point in the range of 130 ℃ to 180 ℃, the cyclic ketone containing at least one of cycloheptanone, cyclohexanone and cyclopentanone.
In this example, the proportion of the silicone sol in the polyamideimide resin was 30% by weight. The organic silica sol comprises 20 weight percent of adhesive tape 8, the dispersion solvent of the organic silica sol is cyclic ketone with the boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone.
In this embodiment, the adhesive tape 8 includes two adhesive tape bodies and silica particles uniformly dispersed between the two adhesive tape bodies, the adhesive tape body is made of a base cloth and an emulsion adhesive layer coated thereon after drying, the base cloth faces outward when the two adhesive tape bodies are adhered, and the emulsion adhesive layers are adhered and adhered to each other to form a whole. The base cloth in the adhesive tape body is made of glass fiber, and the emulsion adhesion layer in the adhesive tape body is a Teflon emulsion layer.
In this embodiment, the adhesive tape body is formed by first forming a whole adhesive tape body by the forming device, and then longitudinally and transversely cutting the whole adhesive tape body. The forming device comprises a silica hopper 3, a front conveying pair wheel 4, a rear conveying pair wheel 5, a longitudinal slitting blade 6 and a hobbing cutter shaft 7, wherein the silica hopper 3 is positioned in the middle area of the non-joint part of the adhesive tapes I1 and II2, the front conveying pair wheel 4 and the rear conveying pair wheel 5 are respectively positioned at two sides of the joint part of the adhesive tapes I1 and II2, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel 4 and the rear conveying pair wheel 5, and the longitudinal slitting blade 6 is arranged between the front conveying pair wheel 4 and the rear conveying pair wheel 5 side by side; the rolling cutter shaft 7 is positioned at the rear side of the rear conveying pair wheel 5, the joint parts of the adhesive tapes I1 and II2 form a plurality of strip parts through the longitudinal slitting blade 6, and the strip parts form each adhesive tape object 8 through the cutting action of the rolling cutter shaft 7.
In this example, the length of the tape material is 0.1cm, and the width is 1/10 of the length.
The preparation method of the fireproof insulating coating comprises the following steps:
1) preparing a rubber belt material by using a forming device, wherein the forming device comprises a silica hopper 3, a front conveying pair wheel 4, a rear conveying pair wheel 5, a longitudinal slitting blade 6 and a hobbing cutter shaft 7, the silica hopper 3 is positioned in the middle area of the non-joint part of the rubber belts I1 and II2, the front conveying pair wheel 4 and the rear conveying pair wheel 5 are respectively positioned at two sides of the joint part of the rubber belts I1 and II2, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel 4 and the rear conveying pair wheel 5, and the longitudinal slitting blade 6 is arranged between the front conveying pair wheel 4 and the rear conveying pair wheel 5 side by side; the rolling cutter shaft 7 is positioned at the rear side of the rear conveying pair wheel 5, the joint parts of the adhesive tape I1 and the adhesive tape II2 form a plurality of strip parts through the longitudinal slitting blade 6, and the strip parts form each adhesive tape object 8 through the cutting action of the rolling cutter shaft 7;
2) mixing the adhesive tape material with a dispersing solvent to prepare an organic silica sol, wherein the adhesive tape material accounts for 20% by weight, the dispersing solvent is a cyclic ketone with a boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone;
3) the polyamide-imide resin coating is formed by dissolving polyamide-imide resin in a solvent containing cyclic ketones with a boiling point within a range of 130-180 ℃, wherein the cyclic ketones comprise at least one of cycloheptanone, cyclohexanone and cyclopentanone.
EXAMPLE III
This example provides a flameproof insulating coating material used for an insulated wire in which an insulating film is provided on a conductor 9 having a square cross section, the insulating coating material being formed by mixing a polyamideimide resin coating material containing a solvent and a polyamideimide resin and a silicone sol.
In this example, the polyamideimide resin coating is formed by dissolving a polyamideimide resin in a solvent containing a cyclic ketone having a boiling point in the range of 130 ℃ to 180 ℃, the cyclic ketone containing at least one of cycloheptanone, cyclohexanone and cyclopentanone.
In this example, the proportion of the silicone sol in the polyamideimide resin was 40% by weight. The organic silica sol comprises 30 weight percent of adhesive tape 8, the dispersion solvent of the organic silica sol is cyclic ketone with the boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone.
In this embodiment, the adhesive tape 8 includes two adhesive tape bodies and silica particles uniformly dispersed between the two adhesive tape bodies, the adhesive tape body is made of a base cloth and an emulsion adhesive layer coated thereon after drying, the base cloth faces outward when the two adhesive tape bodies are adhered, and the emulsion adhesive layers are adhered and adhered to each other to form a whole. The base cloth in the adhesive tape body is made of glass fiber, and the emulsion adhesion layer in the adhesive tape body is a Teflon emulsion layer.
In this embodiment, the adhesive tape body is formed by first forming a whole adhesive tape body by the forming device, and then longitudinally and transversely cutting the whole adhesive tape body. The forming device comprises a silica hopper 3, a front conveying pair wheel 4, a rear conveying pair wheel 5, a longitudinal slitting blade 6 and a hobbing cutter shaft 7, wherein the silica hopper 3 is positioned in the middle area of the non-joint part of the adhesive tapes I1 and II2, the front conveying pair wheel 4 and the rear conveying pair wheel 5 are respectively positioned at two sides of the joint part of the adhesive tapes I1 and II2, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel 4 and the rear conveying pair wheel 5, and the longitudinal slitting blade 6 is arranged between the front conveying pair wheel 4 and the rear conveying pair wheel 5 side by side; the rolling cutter shaft 7 is positioned at the rear side of the rear conveying pair wheel 5, the joint parts of the adhesive tapes I1 and II2 form a plurality of strip parts through the longitudinal slitting blade 6, and the strip parts form each adhesive tape object 8 through the cutting action of the rolling cutter shaft 7.
In this example, the length of the tape material is 1cm, and the width thereof is 1/3.
The preparation method of the fireproof insulating coating comprises the following steps:
1) preparing a rubber belt material by using a forming device, wherein the forming device comprises a silica hopper 3, a front conveying pair wheel 4, a rear conveying pair wheel 5, a longitudinal slitting blade 6 and a hobbing cutter shaft 7, the silica hopper 3 is positioned in the middle area of the non-joint part of the rubber belts I1 and II2, the front conveying pair wheel 4 and the rear conveying pair wheel 5 are respectively positioned at two sides of the joint part of the rubber belts I1 and II2, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel 4 and the rear conveying pair wheel 5, and the longitudinal slitting blade 6 is arranged between the front conveying pair wheel 4 and the rear conveying pair wheel 5 side by side; the rolling cutter shaft 7 is positioned at the rear side of the rear conveying pair wheel 5, the joint parts of the adhesive tape I1 and the adhesive tape II2 form a plurality of strip parts through the longitudinal slitting blade 6, and the strip parts form each adhesive tape object 8 through the cutting action of the rolling cutter shaft 7;
2) mixing the adhesive tape material with a dispersing solvent to prepare an organic silica sol, wherein the adhesive tape material accounts for 30% by weight, the dispersing solvent is a cyclic ketone with a boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone;
3) the polyamide-imide resin coating is formed by dissolving polyamide-imide resin in a solvent containing cyclic ketones with boiling points within the range of 130-180 ℃, wherein the cyclic ketones comprise at least one of cycloheptanone, cyclohexanone and cyclopentanone.
The insulating coating prepared in the first to third examples is an insulating film formed after being coated on the outer side of the conductor 9, and the fracture toughness KIC test proves that the insulating film can improve the toughness of the wire by 10-20%; it was found by the thickness measurement that the insulating coating material hardly flowed from the corner portion of the conductor 9 to the flat portion due to the resistance of the inner land portion 8, and the thickness of the insulating coating film on the corner portion was prevented from being thinner than that of the flat portion.
The silicon dioxide particle dispersion device is scientific and reasonable in structural design, an adhesive tape body in an adhesive tape object is used as a carrier to carry silicon dioxide particles, the adhesive tape object is uniformly dispersed through a mixing process to achieve the dispersion uniformity of the silicon dioxide particles, the fireproof insulation requirement is met, and meanwhile the toughness of an insulation film can be greatly improved.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A fire-retardant insulating coating material for an insulated wire having an insulating film provided on a conductor having a quadrangular cross section, the insulating coating material being formed by mixing a polyamideimide resin coating material containing a solvent and a polyamideimide resin with a silicone sol, characterized in that: the organic silica sol comprises 20-30% of adhesive tape objects in parts by weight, the adhesive tape objects comprise two adhesive tape bodies and silica particles uniformly dispersed between the two adhesive tape bodies, the adhesive tape bodies are prepared by drying a base cloth and an emulsion adhesive layer coated on the base cloth, the base cloth faces outwards when the two adhesive tape bodies are adhered, and the emulsion adhesives are mutually adhered and adhered into a whole.
2. The fireproof insulating paint according to claim 1, wherein: the dispersion solvent of the organic silica sol is cyclic ketone with a boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone.
3. The fireproof insulating paint according to claim 1, wherein: the polyamide-imide resin coating is formed by dissolving the polyamide-imide resin in a solvent containing a cyclic ketone having a boiling point in the range of 130 ℃ to 180 ℃, the cyclic ketone containing at least one of cycloheptanone, cyclohexanone and cyclopentanone.
4. The fireproof insulating paint according to claim 1, wherein: the proportion of the organic silica sol in the polyamide-imide resin is 30-40% by weight.
5. The fireproof insulating paint according to claim 1, wherein: the base cloth in the adhesive tape body is made of glass fiber.
6. The fireproof insulating paint according to claim 1, wherein: the emulsion adhesion layer in the adhesive tape body is a Teflon emulsion layer.
7. The fireproof insulating paint according to claim 1, wherein: the adhesive tape body is formed by manufacturing a whole adhesive tape body by a forming device, and then longitudinally and transversely cutting the whole adhesive tape body.
8. The fireproof insulating paint of claim 7, wherein: the forming device comprises a silica hopper, a front conveying pair wheel, a rear conveying pair wheel, a longitudinal slitting blade and a hobbing cutter shaft, wherein the silica hopper is positioned in the middle area of the part, which is not jointed with the adhesive tape I and the adhesive tape II, of the adhesive tape I; the rolling cutter shaft is positioned at the rear side of the rear conveying paired wheel, the joint part of the adhesive tape I and the adhesive tape II forms a plurality of strip parts through a longitudinal slitting blade, and the strip parts form each adhesive tape object through the cutting action of the rolling cutter shaft.
9. The fire-retardant insulating paint according to claim 8, characterized in that: the length of the adhesive tape object is 0.1-1cm, and the width of the adhesive tape object is 1/10-1/3 of the length.
10. A preparation method of a fireproof insulating coating is characterized by comprising the following steps:
1) preparing a rubber belt material by utilizing a forming device, wherein the forming device comprises a silicon dioxide hopper, a front conveying pair wheel, a rear conveying pair wheel, a longitudinal slitting blade and a hobbing cutter shaft, the silicon dioxide hopper is positioned in the middle area of the non-joint part of the rubber belt I and the rubber belt II, the front conveying pair wheel and the rear conveying pair wheel are respectively positioned at two sides of the joint part of the rubber belt I and the rubber belt II, the joint part is forcibly conveyed backwards under the clamping action of the front conveying pair wheel and the rear conveying pair wheel, and the longitudinal slitting blade is arranged between the front conveying pair wheel and the rear conveying pair wheel side by side; the rolling cutter shaft is positioned at the rear side of the rear conveying paired wheel, the joint part of the adhesive tape I and the adhesive tape II forms a plurality of strip parts through a longitudinal slitting blade, and the strip parts form each adhesive tape object through the cutting action of the rolling cutter shaft;
2) mixing the adhesive tape material with a dispersing solvent to prepare an organic silica sol, wherein the adhesive tape material accounts for 20-30 wt%, the dispersing solvent is a cyclic ketone with a boiling point in the range of 130-180 ℃, and the cyclic ketone comprises at least one of cycloheptanone, cyclohexanone and cyclopentanone;
3) mixing polyamide-imide resin coating and organic silicon sol to prepare insulating coating, wherein the organic silicon sol accounts for 30-40% by weight, the polyamide-imide resin coating is formed by dissolving the polyamide-imide resin in a solvent containing cyclic ketones with boiling points within the range of 130-180 ℃, and the cyclic ketones comprise at least one of cycloheptanone, cyclohexanone and cyclopentanone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975741.7A CN112048208A (en) | 2020-09-16 | 2020-09-16 | Fireproof insulating coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975741.7A CN112048208A (en) | 2020-09-16 | 2020-09-16 | Fireproof insulating coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112048208A true CN112048208A (en) | 2020-12-08 |
Family
ID=73603028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010975741.7A Withdrawn CN112048208A (en) | 2020-09-16 | 2020-09-16 | Fireproof insulating coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112048208A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2666637Y (en) * | 2003-09-18 | 2004-12-29 | 何林 | Cutting tool for bamboo splints and picks |
| CN102206464A (en) * | 2010-03-30 | 2011-10-05 | 日立卷线株式会社 | Insulating varnish and insulated wire formed by using the same |
| KR101269653B1 (en) * | 2011-12-20 | 2013-05-30 | 세종대학교산학협력단 | Inorganic nanofiller, partial discharge resistant enameled wire comprising the same, and preparing method of the enameled wire |
| CN104530546A (en) * | 2014-12-22 | 2015-04-22 | 山东农业大学 | Special anti-reflection reinforced master batch for agricultural greenhouse film and preparation method of anti-reflection reinforced master batch |
| CN104972510A (en) * | 2015-07-02 | 2015-10-14 | 安徽理工大学 | Cutting device utilizing waste conveying belt for manufacturing mining support stripe |
| CN106010116A (en) * | 2016-06-29 | 2016-10-12 | 广西凯威铁塔有限公司 | A kind of anti-aging artificial tree bark and preparation method thereof |
| CN106590324A (en) * | 2015-10-15 | 2017-04-26 | 天津市硅酸盐研究所有限公司 | Technology research and development of organic and inorganic composite silicon steel plate insulating paint |
| CN106916367A (en) * | 2017-03-16 | 2017-07-04 | 华南理工大学 | A kind of film containing nano titanium oxide and preparation method thereof |
| CN107629714A (en) * | 2017-11-06 | 2018-01-26 | 张永宏 | A kind of antistatic PET film adhesive tape |
| CN107805431A (en) * | 2017-11-14 | 2018-03-16 | 蚌埠市嘉实机电设备制造有限公司 | A kind of capacitor case coatings |
| CN107974165A (en) * | 2017-11-29 | 2018-05-01 | 曹结宾 | One kind heating cable |
-
2020
- 2020-09-16 CN CN202010975741.7A patent/CN112048208A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2666637Y (en) * | 2003-09-18 | 2004-12-29 | 何林 | Cutting tool for bamboo splints and picks |
| CN102206464A (en) * | 2010-03-30 | 2011-10-05 | 日立卷线株式会社 | Insulating varnish and insulated wire formed by using the same |
| KR101269653B1 (en) * | 2011-12-20 | 2013-05-30 | 세종대학교산학협력단 | Inorganic nanofiller, partial discharge resistant enameled wire comprising the same, and preparing method of the enameled wire |
| CN104530546A (en) * | 2014-12-22 | 2015-04-22 | 山东农业大学 | Special anti-reflection reinforced master batch for agricultural greenhouse film and preparation method of anti-reflection reinforced master batch |
| CN104972510A (en) * | 2015-07-02 | 2015-10-14 | 安徽理工大学 | Cutting device utilizing waste conveying belt for manufacturing mining support stripe |
| CN106590324A (en) * | 2015-10-15 | 2017-04-26 | 天津市硅酸盐研究所有限公司 | Technology research and development of organic and inorganic composite silicon steel plate insulating paint |
| CN106010116A (en) * | 2016-06-29 | 2016-10-12 | 广西凯威铁塔有限公司 | A kind of anti-aging artificial tree bark and preparation method thereof |
| CN106916367A (en) * | 2017-03-16 | 2017-07-04 | 华南理工大学 | A kind of film containing nano titanium oxide and preparation method thereof |
| CN107629714A (en) * | 2017-11-06 | 2018-01-26 | 张永宏 | A kind of antistatic PET film adhesive tape |
| CN107805431A (en) * | 2017-11-14 | 2018-03-16 | 蚌埠市嘉实机电设备制造有限公司 | A kind of capacitor case coatings |
| CN107974165A (en) * | 2017-11-29 | 2018-05-01 | 曹结宾 | One kind heating cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4109098A (en) | High voltage cable | |
| US3349164A (en) | Insulative stress relief film | |
| US20110232937A1 (en) | Conductive elastomer and method of applying a conductive coating to a cable | |
| DE2501811A1 (en) | HIGH VOLTAGE CABLE WITH SYNTHETIC INSULATION AND SEMI-CONDUCTIVE COATING | |
| CN105308688B (en) | Material including redox graphene, includes the device and the method that manufactures the material of the material | |
| EP3207546A1 (en) | Dielectric material with enhanced breakdown strength | |
| CN110003656B (en) | Silicone rubber composite material and preparation method thereof | |
| US20200251243A1 (en) | Magnet Wire With Improved Enamel Adhesion | |
| CN217933210U (en) | Silica gel insulation new energy automobile shielding cable | |
| JP2010040320A (en) | Insulation coating for electric wire, and electric insulated wire using the same | |
| CN103971846A (en) | High-voltage cable | |
| CN112048208A (en) | Fireproof insulating coating and preparation method thereof | |
| CN105255017A (en) | Ethylene-propylene rubber insulating material for medium voltage power cable and preparation method thereof | |
| CN110993180B (en) | High-voltage pulse transmission cable and preparation method thereof | |
| EP3591672B1 (en) | Insulator with resistivity gradient | |
| JPH02189814A (en) | electric coil | |
| CN107768045A (en) | A kind of composite insulator with the equal laminated structure of nonlinear conductance material | |
| KR102001942B1 (en) | Conductor making method for gas-insulated switchgear | |
| US11418147B2 (en) | Integrated photovoltaic cable and manufacturing method thereof | |
| CN211578402U (en) | Connection sealing structure of electric transmission line and connection sealing structure of cable | |
| JPS6254214B2 (en) | ||
| CN112521885A (en) | Semi-conductive self-adhesive tape for high-follow-shape communication cable | |
| CN106935317B (en) | A kind of compound insulation wire and preparation method thereof | |
| CN106158088A (en) | A kind of environment-friendly varnished wire for direct current generator | |
| JP3121376B2 (en) | Polyimide laminate and cable insulated with the laminate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201208 |