CN111034353A - Woven soft planar heating element containing protective film and its manufacturing method - Google Patents
Woven soft planar heating element containing protective film and its manufacturing method Download PDFInfo
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- CN111034353A CN111034353A CN201880054946.2A CN201880054946A CN111034353A CN 111034353 A CN111034353 A CN 111034353A CN 201880054946 A CN201880054946 A CN 201880054946A CN 111034353 A CN111034353 A CN 111034353A
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- protective film
- layer
- heating element
- woven
- heat generating
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
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Images
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
- H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles
- H05B3/347—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles woven fabrics
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Surface Heating Bodies (AREA)
- Resistance Heating (AREA)
Abstract
The present invention discloses a weaving type soft planar heating element containing a protective film and a manufacturing method thereof, the planar heating element comprises: a heating layer formed by weaving metal heating fibers; the protective film is made of polymer materials, wraps the surface of the heating layer to prevent the heating layer from being damaged by the external environment, and is soaked into gaps of the woven metal heating fibers to prevent air holes from existing. The woven soft sheet heating element comprising the protective film thus obtained is molded to form the protective film, and is excellent in flexibility, free from peeling during use, high in production speed and stable in quality. Further, the heat emitted from the heat generating layer is reflected to control the heat direction, thereby exhibiting high heat efficiency and shortening the heating time.
Description
Technical Field
The present invention relates to a woven flexible sheet heating element comprising a protective film and a method for producing the same, and more particularly, to a sheet heating element having excellent flexibility, no peeling during use, high production speed and stable quality, in which the protective film is formed by molding (molding).
Background
The heating element for converting energy from electricity or gas into heat energy is generally classified into a linear heating element made of metal or ceramic wire, a block heating element such as graphite, and a planar heating element in which a heating element is coated on a planar electrode in a film (membrane) manner. The planar heating element has a planar metal electrode, a metal, ceramic or carbon heating layer coated on the planar metal electrode, and insulators sealing the upper and lower parts of the heating layer.
Recently, there has been a demand for a flexible planar heat-generating element in which the planar heat-generating element is formed into a non-planar curved surface shape or is flexibly bent during use. A conventional flexible sheet heating element is produced by applying a material such as carbon to a flexible substrate, or by arranging a linear heating element such as nichrome on a flexible material such as a plastic film or a cloth and fixing the linear heating element. However, this planar heat-generating element has problems such as a problem of durability, a problem of uneven heat generation over the entire area, and a problem that the entire heat-generating element cannot operate if the wire of the linear heat-generating element is broken. For example, a carbon-based electrode supported by a planar heating element is oxidized at a high temperature to be brittle and is easily cracked due to its brittleness when subjected to an impact, which makes it difficult to use the planar heating element for a long time. Further, when the far infrared ceramic heating element is coated on the upper portion of the metal substrate, the ceramic heating element cannot be used when the sheet heating element is largely bent due to the bending limit of the ceramic heating element.
In order to overcome this problem, a technique has been developed in which a conductive material is formed into a linear shape and then woven to prepare a sheet heating element. That is, for example, "Kokai patent office publication No. 10-2008-0090068 planar heating element and physical structure and manufacturing method thereof" discloses a method of weaving a planar heating element using a weaving yarn in which a general fiber and a metal fiber are twisted. In addition, the "weaving of a heating element by a veil of 20-2005-0011304 registered utility model in the Korean patent office" discloses a technique of coating a conductive carbon on the surface of a polymer wire having no conductivity to form a planar heating element.
The metal fiber sheet heating element as described above is produced by weaving a heating electrode and then bonding layers of a polymer insulating material to both surfaces thereof by hot pressing or bonding insulating ceramic fibers in a layered manner. However, when the woven-type heating element is woven by this method, the efficiency is reduced because the polymer layer bonded to the electrode of the heating element has a large thickness, and there is a problem that the interlayer is peeled off due to repeated mechanical stress during use. Further, in the manufacturing process, the production speed is reduced due to the complicated process, and expensive facilities such as hot press equipment are required, and it is difficult to form the heat-generating bodies in various shapes by using a mold.
Disclosure of Invention
Problems to be solved by the invention
Accordingly, an object of the present invention is to provide a woven flexible sheet heating element comprising a protective film, which is excellent in flexibility and does not peel off during use, has a high production speed and is stable in quality, and a method for producing the same.
Another object of the present invention is to provide a woven flexible sheet heating element including a protective film, which can reflect heat emitted from a heat generating layer to control the direction of heat, thereby exhibiting high thermal efficiency and shortening the heating time, and a method for manufacturing the same.
Means for solving the problems
The object can be achieved by a woven soft planar heating element comprising a protective film, comprising: a heating layer formed by weaving metal heating fibers; the protective film is made of polymer materials, wraps the surface of the heating layer to prevent the heating layer from being damaged by the external environment, and is soaked into gaps of the woven metal heating fibers to prevent air holes from existing.
Here, it is preferable that the protective film is formed by molding (molding) after the heat generating layer is immersed in the liquid polymer in a roll-to-roll manner or is formed by any one of a spraying method, a screen printing method, and a squeegee method.
Preferably, the heat generating layer further includes a reflective layer formed by weaving ceramic fibers, the reflective layer being laminated on one surface of the heat generating layer and reflecting heat generated from the one surface so that heat generated from the heat generating layer is released from the other surface, and the protective film is impregnated into gaps between the woven ceramic fibers so as to prevent air holes from being present and is present so as to wrap surfaces of the heat generating layer and the reflective layer.
Preferably, the heat generating layer is formed by weaving the metal heat generating fibers with warp and weft, the reflecting layer is formed by weaving the ceramic fibers with warp and weft, and the heat generating layer and the reflecting layer are bonded by bonding or sewing, and the heat generating layer and the reflecting layer are integrally woven by weaving the metal heat generating fibers with warp and weft and weaving the ceramic fibers with warp and weft.
Preferably, compared with the reflection layer, the metal heating fibers of the heating layer have a larger configuration area than the ceramic fibers, and compared with the heating layer, the ceramic fibers of the reflection layer have a larger configuration area than the metal heating fibers.
Preferably, the ceramic fiber is selected from the group consisting of glass fiber, heat-resistant polymer fiber, titanium oxide fiber, alumina fiber, zirconia fiber, silicon carbide fiber, potassium titanate fiber, basalt fiber, and a mixture thereof.
Preferably, a heat insulating layer composed of a polymer and ceramic particles is stacked on the protective film, and a radiation layer composed of a polymer and a carbon material is stacked on the surface opposite to the heat insulating layer stacked on the protective film.
Preferably, the material of the metal heat emitting fiber is selected from the group consisting of platinum (Pt), iron (Fe), nickel (Ni), aluminum (Al), copper (Cu), titanium (Ti), molybdenum (Mo), gold (Au), silver (Ag), palladium (Pd), ruthenium (Ru), magnesium (Mg), chromium (Cr), zinc (Zn), tungsten (W), cobalt (Co), and alloys thereof, and preferably, the polymer material is selected from the group consisting of epoxy-based resin, acrylic-based resin, polyamide-based resin, polyimide-based resin, and a mixture thereof.
The above object can be also achieved by a method for manufacturing a woven flexible sheet heating element including a protective film, comprising the steps of: weaving the metal heating fiber to form a heating layer; coating a polymer to wrap the surface of the heat generating layer and impregnating the polymer into the gaps of the woven metal heat generating fibers to form a protective layer while avoiding the presence of pores.
Here, it is preferable that the protective film is formed by molding after immersing the heat generating layer in a liquid polymer in a roll-to-roll (roll-to-roll) manner or is formed by any one of a spraying method, a screen printing method, and a squeegee method.
Effects of the invention
The arrangement of the present invention as described above can provide a woven flexible sheet heating element comprising a protective film which is formed by molding, is excellent in flexibility, does not peel off during use, and has high production speed and stable quality.
Further, the heat emitted from the heat generating layer is reflected to control the heat direction, thereby exhibiting high heat efficiency and shortening the heating time.
Drawings
FIG. 1 is a cross-sectional view of a woven flexible sheet heating element according to an embodiment of the present invention.
Fig. 2 is a sectional view showing a protective film forming process.
Detailed Description
The woven flexible sheet heating element including a protective film and the method of manufacturing the same according to the embodiment of the present invention will be described in detail below with reference to the drawings.
FIG. 1a shows a woven flexible sheet heating element 10 of the first embodiment, which comprises a heat generating layer 11 and a protective film 13. In particular, the heat generating layer 11 is formed by weaving thin linear metal heat generating fibers made of a heat generating metal, and a general weaving method such as a silk weave, a twill weave, and an sub-weave can be used as the weaving method, and the weaving method can be used without limitation. Preferably, the material of the metal heat generating fibers is selected from the group consisting of platinum (Pt), iron (Fe), nickel (Ni), aluminum (Al), copper (Cu), titanium (Ti), molybdenum (Mo), gold (Au), silver (Ag), palladium (Pd), ruthenium (Ru), magnesium (Mg), chromium (Cr), zinc (Zn), tungsten (W), cobalt (Co), and alloys thereof, or a plurality of metal heat generating fibers each made of a different metal or alloy material are prepared and woven. In particular, the metal heating fiber made of alloy is preferably made of stainless steel (stainless steel) or nichrome (nichrome), and may be woven by using stainless steel and nichrome separately or together.
SUS304, SUS304L, SUS316L, and the like can be used as stainless steel fibers, and these fibers are excellent in flexibility, strength, weaving properties, heat generating properties, and the like, and are therefore very suitable for the present invention. The nichrome fiber has high heat generation efficiency and is easy to weave, but is less flexible than stainless steel fiber. Further, although the fiber made of a single metal or alloy has a lower heat generation efficiency than the stainless steel fiber or the nichrome fiber, it is easily applicable to a special device such as a semiconductor device or a device requiring metal-specific characteristics.
Preferably, the diameter of the metal heat generating fiber is 10 to 200 μm, and the weaving pitch of the metal heat generating fiber is very close when the diameter is less than 10 μm and it is difficult to mold (molding) the protective film 13 between the pitches, so that it is possible to separate the heat generating layer 11 and a part of the region of the protective film 13 from each other, and a thicker heat generating layer 11 is formed when it exceeds 200 μm and the flexibility is lowered.
The protective film 13 is formed of a polymer material in a structure wrapping the heat generating layer 11 so as to protect the heat generating layer 11 from the external environment and to achieve insulation. At this time, the protective film 13 wraps the surface of the heat generating layer 11 to prevent the heat generating layer 11 from being damaged by the external environment, and is made of a polymer material impregnated into the gaps of the woven metal heat generating fibers to prevent the existence of pores. That is, the protective film 13 prevents the heat generating layer 11 from being electrically leaked or short-circuited by contact with the outside, and is formed so as to cover the outer surface of the heat generating layer 11 to prevent mechanical abrasion or breakage.
If there are pores (holes) between the heat generating layer 11 and the protective film 13, cracks may occur in the pores by external stimulus when the planar heat generating element 10 is continuously bent or washed, and the heat generating layer 11 and the protective film 13 may be separated from each other. In particular, if the insulating layers are stacked on the surfaces of the heat generating layers and then they are pressed together by heat treatment as in the conventional art, pores are always present between the heat generating layers and the insulating layers regardless of the pressure applied, and thus cracks may be generated in the pores by external stimulus or washing. However, in the present invention, the polymer is impregnated between the metal heat generating fibers constituting the heat generating layer 11 to prevent the presence of pores, and the polymer is also applied to the surface of the heat generating layer 11 to form the protective film 13 in which the impregnated polymer and the polymer applied to the surface are integrally formed.
The method of manufacturing the planar heat-generating body 10 as described above includes the steps of: weaving metal heating fibers to form a heating layer 11; the protective layer 13 is formed by coating a polymer to wrap the surface of the heat generating layer 11 and impregnating the polymer into the gaps of the woven metal heat generating fibers to avoid the presence of pores.
Among them, the method of forming the protective layer 13 can be such that the liquid polymer 1 is prepared as shown in fig. 2 and the heat generating layer 11 is formed by molding after being immersed in the liquid polymer 1. When the protective film 13 is formed by molding, the liquid polymer 1 is arranged in each gap of the woven heat generating layer 11 and then cured, so that each gap of the heat generating layer 11 is uniformly filled without a gap, and a stable protective film 13 can be formed. At this time, the heat generating layer 11 is supplied into the liquid polymer 1 in a roll-to-roll manner.
The method of coating the polymer is generally as follows, attaching thermoplastic insulating polymer films to the upper and lower portions of the heat generating layer, and then laminating the polymer protective film to the heat generating layer by means of hot pressing. When the protective film is formed by the above method, the polymer does not fill the gap of the heat generating layer well, and the polymer film may be peeled off depending on the state of the polymer film during use, thereby causing product defects. In contrast, when the protective film 13 is woven by the molding method of the present invention, the heat generating layer 11 can be stably inserted into the polymer and is mechanically very stable, and can be applied thinner than the film method to improve flexibility. Also, the present invention is easily mass-produced using a roll-to-roll method, can be easily attached using chemical bonding or mechanical sewing, and thus can easily make clothes, jackets, products such as greenhouse applications, and the like. Further, the spray method, the squeegee method, or the screen printing method, which is a polymer coating method, does not form a protective film superior to the molding method of the present invention, but can be applied as a process.
The polymer material forming the protective film 13 may be made of various materials depending on flexibility, usable temperature, and flame retardancy. For example, an epoxy-based or acrylic resin is preferable when the woven flexible sheet heating element 10 is used at a temperature of 150 ℃ or lower, and a polyamide resin is preferable when the woven flexible sheet heating element is used at a temperature of 250 ℃ or lower, although the flexibility is not high. Further, when the woven flexible sheet heating element 10 is used at a temperature of 400 ℃ or lower while it is required to have flexibility, a polyimide resin is preferably used, and the resin should be prepared by using a thermosetting resin or an ultraviolet ray curing resin in its entirety and curing the thermosetting resin or the ultraviolet ray curing resin in a high viscosity liquid state when applied to the heat generating layer 11 to form a solid state. When the heat-generating body 11 of the present invention is used for applications requiring flame retardancy, it is preferable to have a thermoplastic property of 10cm, usually 1 to 30cm, based on the flame retardant for automobiles.
As shown in fig. 1b, the woven flexible sheet heating element 20 of the second embodiment includes a heat generating layer 21, a protective film 23, and a reflective layer 25. Here, the shapes of the heat generating layer 21 and the protective film 23 are the same as the materials and the heat generating layer 11 and the protective film 13 of the first embodiment, and thus detailed descriptions thereof will be omitted below.
The reflective layer 25 is stacked on one surface of the heat generating layer 21 and reflects heat generated on one surface to allow heat generated on the heat generating layer 21 to be released from the other surface, and preferably, the reflective layer 25 is disposed inside the protective film 23. The reflective layer 25 is formed by weaving ceramic fibers. More specifically, the protective film 23 is impregnated into the gaps of the woven ceramic fibers to avoid the presence of pores, and is present so as to wrap the surfaces of the heat generating layer 21 and the reflective layer 25. That is, like the protective film 23 formed on the heat generating layer 21, as in the first embodiment, the protective film 23 is impregnated into the gap of the reflective layer 25 to avoid the presence of pores so that the reflective layer 25 and the protective film 23 are not separated from each other by being subjected to external stimulus or washing.
Here, the ceramic fiber is made of a ceramic material that does not absorb heat but reflects light in a thin thread shape, and is woven by a weaving method such as silk weaving, twill weaving, and sub-weaving, like the metal heat generating fiber. Preferably, the material of the ceramic fiber reflecting heat is selected from the group consisting of glass fiber, heat-resistant polymer fiber, titanium oxide fiber, alumina fiber, zirconia fiber, silicon carbide fiber, potassium titanate fiber, basalt fiber, and a mixture thereof, but the present invention is not limited thereto. In particular, basalt fiber (basalt fiber) obtained by spinning basalt is an excellent heat-insulating fiber and is very suitable for the present invention.
The heat generating layer 21 and the reflecting layer 25 of the present invention may be formed in two types as described below. First, the heat generating layer 21 is formed by weaving metal heat generating fibers with warps and wefts, and the reflecting layer 25 is also formed by weaving ceramic fibers with warps and wefts. The heat generating layer 21 and the reflecting layer 25 may be bonded with an adhesive or sewn to form the heat generating element 20. When the heating element 20 is formed in this structure, the metal heating fibers and the ceramic fibers can clearly distinguish the layers thereof, so that heat generated from the metal heating fibers is easily discharged to the other surface of the heating layer 21.
In addition, the woven soft planar heating element 20, which can be configured in other shapes, is integrally woven with the heating layer 21 and the reflecting layer 25 by weaving metal heating fibers with warp and weft and weaving ceramic fibers with the metal heating fibers with warp and weft. At this time, the metal heat generating fibers in the region of the heat generating layer 21 are woven so as to have a wider area than the region of the reflecting layer 25, and the ceramic fibers in the region of the reflecting layer 25 are woven so as to have a wider area than the region of the heat generating layer 21. Accordingly, the heat generating layer 21 includes a part of the ceramic fibers but exhibits a heat releasing function because the arrangement area of the metal heat generating fibers is wide, whereas the reflecting layer 25 includes a part of the metal heat generating fibers but exhibits a function of reflecting heat released from the heat generating layer 21 to the other surface of the heat generating layer 21 because the arrangement area of the ceramic fibers is wide. Here, it is preferable that the heat generating layer 21 has an arrangement area of the metal heat generating fibers in a range of 70 to 100% and the reflecting layer 25 has an arrangement area of the ceramic fibers in a range of 70 to 100% to form the heat generating body 20. Such an arrangement area is because it is difficult to control the direction of heat discharged from the metal heat generating fibers by the ceramic fibers when each is less than 70%.
The woven flexible sheet heating element 30 of the third embodiment includes a heat generating layer 31, a protective film 33, and a heat insulating layer 35. Here, the shape and material of the heat generating layer 31 and the protective film 33 are the same as those of the heat generating layer 11 and the protective film 13 of the first embodiment, and thus a detailed description thereof will be omitted, and the present embodiment does not separately include the reflective layer 25 of the second embodiment.
The thermal insulation layer 35 is not stacked inside the protective film 33 but stacked outside, and is formed of a material composed of a polymer and ceramic particles. The heat insulating layer 35, like the reflective layer 25, allows heat to escape not in the direction of the heat insulating layer 35 but in the opposite direction. The heat insulating layer 35 is formed by stacking the protective film 33 on the lower portion thereof by a brush method, a spray method, a dip method, a squeegee method, or a screen printing method after the curing. The heat insulating layer 35 having high heat insulating properties is a composite of a specially produced high heat insulating ceramic and a polymer, and has a low thermal conductivity of 0.05W/mK or less. Since a low thermal conductivity of 0.05W/mK or less cannot be achieved by a general single material polymer, and a polymer such as an acrylic resin is filled with a special filler, as an example, the present invention forms a heat insulating layer by using a heat insulating material containing, as a filler, silica spheres (silica balls) or ceramic balls (titania balls) having a size of 10 to 100 μm in a hollow state.
The woven flexible sheet heating element 40 of the fourth embodiment includes a heat generating layer 41, a protective film 43, a reflecting layer 45, a heat insulating layer 47, and a radiation layer 49. Here, the shapes and materials of the heat generating layer 41, the reflective layer 43, the protective film 45, and the heat insulating layer 47 are the same as those of the heat generating layers 21, 31, the protective films 23, 33, the reflective layer 25, and the heat insulating layer 35 of the second and third embodiments, and thus detailed descriptions thereof will be omitted below.
A radiation layer 49 is stacked on the side opposite to the thermal insulation layer 47 stacked on the protective film 43, and the radiation layer 49 is formed by mixing a polymer with a carbon material. The radiation layer 49 having a high infrared emissivity is formed in view of heat generated on the heat-generating body 40 radiating not only by conduction and convection but also by infrared radiation, and is composed of a high emissivity material. As for the high emissivity material, graphite, nanocarbon, carbon nanotube, or graphene, which is a carbon material, and a polymer are mixed to constitute the high emissivity material.
When a conventional planar heating element is made of a metal material, there is a possibility that electric leakage or short circuit may occur due to contact with the outside, and mechanical abrasion or damage may occur. In order to prevent this problem, the heat generating electrode is woven and then the polymer-based insulating material layers are thermocompression bonded or insulating ceramic fibers are bonded in layers on both sides. However, when the woven-type heating element is woven by this method, the efficiency is reduced because the polymer layer bonded to the electrode of the heating element has a large thickness, and there is a problem that the interlayer is peeled off due to repeated mechanical stress during use. Further, in the manufacturing process, the production speed is reduced due to the complicated process, and expensive facilities such as hot press equipment are required, and it is difficult to form the heat-generating bodies in various shapes by using a mold.
In contrast to this, the present invention impregnates the heat generating layers 11, 21, 31, 41 into the liquid polymer 1 and forms the protective films 13, 23, 33, 43 by molding so that the gaps of the heat generating bodies 10, 20, 30, 40 are uniformly and seamlessly filled, thereby not being separated by external impact and forming stable protective films 13, 23, 33, 43. After the heat insulating layers 35 and 47 and the reflecting layers 25 and 45 are formed, the heat energy emitted from the heat generating layers 11, 21, 31 and 41 is reflected by the heat insulating layers 35 and 47 and the reflecting layers 25 and 45 to control the heat direction, and the heat radiation function is improved by the infrared radiation of the radiating layers 25 and 45. Thereby, higher thermal efficiency can be exhibited and heating time can be shortened. In addition, since the heat generating layers 11, 21, 31, 41 and the reflecting layers 25, 45 are formed by weaving metal heat generating fibers and ceramic fibers in the woven flexible planar heating elements 10, 20, 30, 40 of the present invention, the flexibility is high and the impact resistance is excellent, and the mechanical durability and the electrical performance can be improved.
Claims (15)
1. A woven soft planar heating element comprising a protective film, characterized in that,
the method comprises the following steps:
a heating layer formed by weaving metal heating fibers;
the protective film is made of polymer materials, wraps the surface of the heating layer to prevent the heating layer from being damaged by the external environment, and is soaked into gaps of the woven metal heating fibers to prevent air holes from existing.
2. A woven flexible sheet heating element comprising a protective film according to claim 1,
the protective film is formed by molding after immersing the heat generating layer in a liquid polymer in a roll-to-roll manner.
3. A woven flexible sheet heating element comprising a protective film according to claim 1,
the protective film is formed by any one of a spraying method, a screen printing method or a scraper method.
4. A woven flexible sheet heating element comprising a protective film according to claim 1,
further comprising a reflecting layer formed by weaving ceramic fibers, laminated on one surface of the heat generating layer and reflecting heat generated on one surface to let the heat generated on the heat generating layer be released from the other surface,
the protective film is impregnated into gaps of the woven ceramic fibers to prevent pores from being present, and is present to wrap surfaces of the heat generating layer and the reflecting layer.
5. A woven flexible sheet heating element comprising a protective film according to claim 4,
the heating layer is formed by weaving the metal heating fibers by warps and wefts, the reflecting layer is formed by weaving the ceramic fibers by the warps and the wefts, and the heating layer and the reflecting layer are combined in a bonding or sewing mode.
6. A woven flexible sheet heating element comprising a protective film according to claim 4,
the metal heating fibers are woven by warp and weft, and the ceramic fibers are woven by warp and weft together, so that the heating layer and the reflecting layer are integrally woven.
7. A woven flexible sheet heating element comprising a protective film according to claim 4,
compared with the reflecting layer, the configuration area of the metal heating fibers of the heating layer is larger than that of the ceramic fibers, and compared with the heating layer, the configuration area of the ceramic fibers of the reflecting layer is larger than that of the metal heating fibers.
8. A woven flexible sheet heating element comprising a protective film according to claim 4,
the ceramic fiber is selected from the group consisting of glass fiber, heat-resistant polymer fiber, titanium oxide fiber, alumina fiber, zirconia fiber, silicon carbide fiber, potassium titanate fiber, basalt fiber, and a mixture thereof.
9. A woven flexible sheet heating element comprising a protective film according to claim 1,
a heat insulating layer composed of a polymer and ceramic particles is laminated on the protective film.
10. A woven flexible sheet heating element comprising a protective film according to claim 9,
a radiation layer is stacked on a surface opposite to the thermal insulation layer stacked on the protective film, and the radiation layer is composed of a polymer and a carbon material.
11. A woven flexible sheet heating element comprising a protective film according to claim 1,
the metal heating fiber is made of a material selected from the group consisting of platinum, iron, nickel, aluminum, copper, titanium, molybdenum, gold, silver, palladium, ruthenium, magnesium, chromium, zinc, tungsten, cobalt, and alloys thereof.
12. A woven flexible sheet heating element comprising a protective film according to claim 1,
the polymer material is selected from the group consisting of epoxy-based resins, acrylic-based resins, polyamide-based resins, polyimide-based resins, and mixtures thereof.
13. A method for producing a woven soft sheet heating element comprising a protective film,
comprises the following steps:
weaving the metal heating fiber to form a heating layer;
coating a polymer to wrap the surface of the heat generating layer and impregnating the polymer into the gaps of the woven metal heat generating fibers to form a protective layer while avoiding the presence of pores.
14. The method of manufacturing a woven flexible sheet heating element comprising a protective film according to claim 13,
the protective film is formed by molding after immersing the heat generating layer in a liquid polymer in a roll-to-roll manner.
15. The method of manufacturing a woven flexible sheet heating element comprising a protective film according to claim 13,
the protective film is formed by any one of a spraying method, a screen printing method or a scraper method.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2017-0106734 | 2017-08-23 | ||
| KR1020170106734A KR102434600B1 (en) | 2017-08-23 | 2017-08-23 | A woven flexible surface heating element including an insulating film |
| PCT/KR2018/007092 WO2019039718A1 (en) | 2017-08-23 | 2018-06-22 | Woven flexible planar heating element comprising protective film, and method for producing same |
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| Publication Number | Publication Date |
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| CN111034353A true CN111034353A (en) | 2020-04-17 |
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| CN201880054946.2A Pending CN111034353A (en) | 2017-08-23 | 2018-06-22 | Woven soft planar heating element containing protective film and its manufacturing method |
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| Country | Link |
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| KR (1) | KR102434600B1 (en) |
| CN (1) | CN111034353A (en) |
| WO (1) | WO2019039718A1 (en) |
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| CN118031288A (en) * | 2024-03-13 | 2024-05-14 | 广东暖时代科技有限公司 | Mobile flexible heating system |
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| WO2020218641A1 (en) * | 2019-04-25 | 2020-10-29 | (주)티엔케이 | Flexible carbon-fiber heating product having 3d form and manufacturing method therefor |
| CN111567893B (en) * | 2020-04-08 | 2023-01-24 | 深圳麦克韦尔科技有限公司 | Heating element, preparation method thereof and heating non-combustible aerosol forming device |
| KR20220069480A (en) * | 2020-11-20 | 2022-05-27 | 한국전기연구원 | Method of manufacturing a metal fiber heating element electrode in which a connector electrode is bonded to the tip, and a metal fiber heating element electrode manufactured thereby |
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Also Published As
| Publication number | Publication date |
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| KR102434600B1 (en) | 2022-08-19 |
| KR20190021680A (en) | 2019-03-06 |
| WO2019039718A1 (en) | 2019-02-28 |
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