KR20220105516A - Cabon heating sheet for heating the root of the crop - Google Patents

Abstract

A root-zone heated carbon heating sheet of the present invention is equipped with: a carbon weaving network having a first width, and having a first surface and a second surface in a band shape extended in a longitudinal direction; a first protective film having a second width wider than that of the first width, and protecting the first surface of the carbon weaving network; and a second protective film having the same width as that of the second width, and protecting the second surface of the carbon weaving network. In the present invention, each of the first and second protective films comprises: a gas blocking layer; a water blocking layer laminated on the gas blocking layer; a silicon layer coated on the water blocking layer; and an adhesive layer coated on the gas blocking layer. The present invention is completed by combining, by thermal compression, the first protective film, the carbon weaving network, and the second protective film. Therefore, the present invention can maintain the lifespan of the carbon weaving network for a long time.

Description

Root zone heating carbon heating sheet {Cabon heating sheet for heating the root of the crop}

The present invention relates to a carbon heating sheet for warming the rhizome, and more particularly, to a carbon heating sheet for heating the rhizome, which is buried in the ground in a facility house to warm the rhizome of a crop under growth temperature conditions.

Crop cultivation technology through underground heating in a large facility house with a length of about 100m is used.

There are two types of underground heating technology: a hot-water method in which a pipe is buried underground and hot water is supplied to heat the root area of a crop, and an electric type, in which an electric heating wire is buried in the ground and heated by electric energy.

In the electric underground heating method, the carbon woven net heating method using a heating element woven with carbon coating yarn instead of an electric heating wire is widely used.

The carbon woven net heating method is a method in which the heating element woven in the form of a net with carbon coated yarn is buried in the ground.

Usually, carbon woven nets are buried at a depth of 30 to 70 meters above the ground, depending on the type of crop. Therefore, the carbon heating net buried in the ground is supplied with water for crop growth every day, so earth pressure or water pressure according to the depth of the landfill is applied, and it is placed in a state of considerable wetness.

Therefore, it is usually waterproofed and buried with a general plastic resin film such as silicone, PVC or PET.

However, when using such a general salacon or plastic resin film, if the physical strength is weak or there is a pinhole in the film itself, moisture or moisture penetrates into the inside of the waterproofing film through defects or pinholes over time. In this case, when an electric short of the carbon coating company occurs, sufficient heat is not achieved.

In addition, it is estimated that there is a possibility that external moisture or moisture may be sucked into the waterproof membrane in the process of repeating the volume expansion and contraction of the internal air due to the heat of carbon yarn inside the waterproof membrane.

On the other hand, when a carbon heating element with a length of 50 to 100 m along the length of the house is configured as a hard type, there are difficulties in loading, transportation and construction. It is convenient for transportation and construction.

However, if the hardness and strength of the external waterproofing film surrounding the carbon heating mesh is weak, there is a risk of surface scratches or damage during loading, transportation and construction, and these damaged areas may eventually serve as a place for moisture or moisture infiltration in the ground. Subsequently, the careful attention of the operator in handling was required.

Registered Patent No. 102177474 Registered Patent No. 102012447 Registered Patent No. 101515291 Registered Patent No. 101597988 Patent Publication No. 1020170022083 Patent Publication No. 1020140133371 Patent Publication No. 1019990064674

In order to solve the problems of the prior art described above, an object of the present invention is to provide a heating carbon heating sheet for the root area that can prevent failure due to moisture penetration.

Another object of the present invention is to provide a heated carbon heating sheet for the root area, which is easy to load, transport and construct.

In order to achieve the above object, the carbon heating sheet for heating the root part of the present invention has a first width, and a carbon woven network having a first surface and a second surface in a band shape elongated in the longitudinal direction, and wider than the first width A first protective film having a second width and protecting the first surface of the carbon woven net, and a second protective film having the same width as the second width and protecting the second surface of the carbon woven net.

In the present invention, each of the first and second protective films includes a gas barrier layer, a water barrier layer laminated on the gas barrier layer, a silicone layer coated on the water barrier layer, and an adhesive layer coated on the gas barrier layer.

The present invention is completed by laminating the first protective film, the carbon woven net and the second protective film by thermocompression bonding.

The gas barrier layer of the present invention is preferably made of a nylon-based resin. Nylon-based resins have good toughness, physical strength, and gas barrier properties, and are particularly good for blocking moisture or moisture penetration when buried underground because of their excellent pinhole resistance.

The water barrier layer of the present invention is preferably composed of a PET-based resin. PET-based resins have weak gas permeation barrier properties, but good water vapor barrier properties, and good crack resistance, weather resistance, and chemical resistance.

Therefore, in the present invention, the physical properties and penetration of gas and water vapor can be completely blocked by the composite structure of the gas barrier layer and the water barrier layer.

In the present invention, an acrylic resin layer may be further provided between the water barrier layer and the silicone layer. The acrylic resin layer has good hardness and scratch resistance.

In the present invention, the silicone layer is UV-cured and used as a material for releasing/peeling the adhesive layer while protecting the surface of the acrylic resin layer. Therefore, it is possible to pack the heated carbon heating sheet of the root region of the present invention in the form of a roll, so that the convenience of packing, loading and transporting can be promoted.

In the present invention, the adhesive layer is preferably a hot melt adhesive for high-speed adhesion.

In the present invention, wrapping the carbon woven network with a heat storage layer such as a non-woven fabric can help with underground heat generation.

In the present invention, the carbon woven network may be coated with silicone before being wrapped with a heat storage layer.

As described above, the carbon heating sheet for heating the root region of the present invention can completely block moisture or moisture penetration in the ground by configuring the protective film surrounding the carbon woven net in a multi-layer structure, so that the life of the carbon woven net can be maintained for a long time. .

In addition, it has a flexible configuration and strong physical strength and hardness, making it very convenient to load, transport and construct.

However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned above will be clearly understood by those skilled in the art without departing from the spirit and scope of the present invention.

1 is a view for explaining the heating state of the root winding portion of the carbon heating sheet for heating the root zone according to the present invention.
2 and 3 are photographs showing the underground buried construction state of the heated carbon heating sheet in the root zone according to the present invention.
Figure 4 is an equivalent circuit diagram for explaining the electrical characteristics of the heated carbon heating sheet according to the present invention.
5 is a cross-sectional view of a preferred embodiment of the heating carbon heating sheet 10 according to the present invention.
6 is a view for explaining a preferred embodiment of the hot-melt adhesive of the carbon heating sheet according to the present invention.
7 is a photograph of a preferred embodiment of the heating carbon heating sheet 10 according to the present invention.
8 is a close-up photograph of a portion of FIG. 4 .

With respect to the embodiments of the present invention disclosed in the text, specific structural or functional descriptions are only exemplified for the purpose of describing the embodiments of the present invention, and the embodiments of the present invention may be embodied in various forms. It should not be construed as being limited to the embodiments described in .

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, similar reference numerals are used for components.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be Other expressions describing the relationship between elements, such as "between" and "immediately between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate that the specified feature, number, step, operation, component, part, or combination thereof exists, and is one or more It should be understood that this does not preclude the possibility of addition or existence of other features or numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, preferred embodiments of the present invention will be further described with reference to the accompanying drawings. Identical parts in the drawings are treated with the same reference numerals.

1 is a view for explaining the heating state of the rhizome part of the carbon heating sheet for heating the root zone according to the present invention. , FIG. 4 is an equivalent circuit diagram for explaining the electrical characteristics of the heated carbon heating sheet according to the present invention.

1 to 3 , the carbon heating sheet 10 for heating the root zone of the present invention is embedded in the ground at a predetermined depth, for example, 30 to 70 m from the ground surface inside the facility house. It extends along the furrows on both sides of the ridge to provide a constant growth environment for crops throughout the year by heating the root zone of the crop 20 located in the ridge to 15 to 20 ° C. The carbon woven net 30 sealed inside the root winding portion warming carbon heating sheet 10 is woven so that a plurality of carbon-coated yarns 36 are electrically connected between two parallel conductor wires 32 and 34. . Each of the carbon-coated yarns 36 has an inherently identical resistance value (R). Therefore, the terminal resistance (Ro) of the carbon woven network 30 may be calculated as R/n (where n is the number of carbon coated yarns).

However, since watering is repeated every predetermined time for the growth of crops, the carbon heating sheet 10 buried in the ground is placed in a very wet state and has no choice but to receive a certain water pressure during watering.

Therefore, if there is a pinhole in the outer waterproofing membrane surrounding the carbon woven network 30, the risk of moisture or moisture penetrating into the waterproofing membrane through the pinhole is inevitably higher than that of the ground.

In addition, if there is an air layer inside the waterproofing membrane, dew condensation occurs due to water vapor condensation inside the air layer due to the temperature difference between the inner air layer and the outside due to the heat of the carbon woven network, or phase change due to the temperature reduction of the expanded gas and according to Sarl’s law A strong suction force is generated according to the volume reduction, and there is a possibility that external moisture or moisture may be sucked into the interior by this phenomenon.

This phenomenon is likely to occur more easily in the underground, where water pressure and earth pressure act, compared to the surface.

When buried in the ground for a long period of time, the resistance of the carbon coating yarn through which moisture has penetrated is lower than the specific resistance value (R) when the above-mentioned internal condensation or moisture absorption, moisture penetration through the pinhole, or the condensation part 38 occurs. In this case, since most of the current passes through the portion 38, the heat generating ability in the other portions will be significantly reduced.

Therefore, if the wet invasion part occurs in any one place over several tens of meters buried underground, it will not be possible to create a crop growth environment if the desired exothermic action is not possible or if the heat generating ability is remarkably reduced.

Therefore, the heating carbon heating sheet 10 in the root region must be manufactured strictly so that moisture penetration does not occur in any place in the ground even after a long period of time.

5 is a cross-sectional view of a preferred embodiment of the heating carbon heating sheet 100 according to the present invention.

Referring to the drawings, the carbon heating sheet 100 for heating the root part of the present invention has a first width W1 and has a first surface 112 and a second surface 114 in the form of a band elongated in the longitudinal direction. A carbon woven network 110 and a first protective film 120 for protecting the first surface 112 of the carbon woven network 110, having a second width W2 wider than the first width W1, and , having the same width as the second width W2, and a second protective film 130 for protecting the second surface 114 of the carbon woven net (110).

The carbon weave network 110 includes a carbon coated yarn 116 provided as a weft yarn, a polyester yarn 118 provided as a warp yarn, and a stone wire 119 used as a part of the warp on both sides of the warp yarn. The stone wire 119 is provided as a power wire for supplying power to the carbon-coated yarn 116 . The carbon coating yarn 116 is coated with carbon on the aramid yarn by impregnating the aramid yarn in the carbon solution in the carbon impregnation tank.

Each of the first and second protective films 120 and 130 includes the gas barrier layers 122 and 132, the water barrier layers 124 and 134 stacked on the gas barrier layers 122 and 132), and the water barrier layers 124 and 134. printed layers 126 and 136 laminated thereon, silicone layers 128 and 138 coated on the printed layers 126 and 136 , and adhesive layers 129 and 139 coated on the gas barrier layer 122 . do.

The gas barrier layers 122 and 132 are preferably made of nylon-based resin. Nylon-based resins have good toughness, physical strength, and gas barrier properties, and are particularly good for blocking moisture or moisture penetration when buried underground because of their excellent pinhole resistance.

The water blocking layers 124 and 134 are preferably made of PET-based resin. PET-based resins have weak gas permeation barrier properties, but good water vapor barrier properties, and good crack resistance, weather resistance, and chemical resistance.

Therefore, in the present invention, the physical properties and penetration of gas and water vapor can be completely blocked by the multilayer structure of the gas barrier layer and the water barrier layer.

The printing layers 126 and 136 are preferably formed of an acrylic resin layer. The acrylic resin layer has good hardness and scratch resistance.

The silicone layers 128 and 138 are UV-cured and used as a material for releasing/peeling the adhesive layers 129 and 139 while protecting the surface of the acrylic resin layer.

The adhesive layers 129 and 139 are preferably made of a hot melt adhesive. Although the hot melt adhesive has weak heat resistance, the carbon heating sheet of the present invention is not a big problem because it is used in a temperature range of 60° C. or less. Since the surface of the carbon woven net 110 is a non-adhesive surface, a hot melt adhesive is suitable, high-speed adhesion is possible, and it is eco-friendly. In addition, since the bonding process temperature of the hot melt adhesive is about 120° C., it can be applied without thermal stress of the carbon coating company.

In the present invention, the first protective film 120 , the carbon woven net 110 , and the second protective film 130 are thermocompression-bonded and adhered.

6 is a view for explaining a preferred embodiment of a hot-melt bonding machine for a carbon heating sheet according to the present invention, and FIG. 7 is a photograph of a preferred embodiment of a heated carbon heating sheet 100 according to the present invention. 8 is a close-up photograph of a portion of FIG. 7 .

Referring to FIG. 6 , the carbon heating sheet hot melt adhesive 200 includes a frame 210 , a first supply reel 220 , a second supply reel 230 , a third supply reel 240 , and a first guide roller 250 . ), a second guide roller 255 , a heating roller 260 , a first pressing roller 270 , a second pressing roller 280 and a winding reel 290 .

The first supply reel 220 is disposed at the front end of the frame 210 to supply the carbon woven net 110 .

The second supply reel 230 is disposed on the upper portion of the frame 210 to supply the first protective film 120 . The third supply reel 240 is disposed under the frame 210 to supply the second protective film 130 .

The first guide roller 250 film width W1 of the carbon woven net 110 supplied from the front between the first protective film 120 supplied from the upper portion and the second protective film 130 supplied from the lower portion. Guide them in a stacked state so that they are located in the center of the full width W2 of the .

The first protective film 120 / carbon woven net 110 / second protective film 130 laminated by the guide roller 250 is subjected to a constant pressure with respect to the entire width of the carbon heating sheet by the first pressing roller 270 . is pressurized to

The pressurized laminate is guided by the second guide roller 255 and supplied to the heating roller 260 .

The heating roller 260 is composed of five heating rollers arranged in a “W” shape and thermocompression-bonds the guided lamination agent to form a carbon woven net between the first protective film 120 and the second protective film 130 . The adhesive layers 129 and 139 are thermocompression-bonded so that 110 is completely sealed. The thermocompression bonding is performed 5 times while passing between the 5 heating rollers in a zigzag manner.

The second pressing roller 280 presses only the both edges of the carbon heating sheet 100 which is completely thermocompressed by the heating roller 270 and laminated once again, as shown in FIG. By re-compressing the thinner edge portion, the edge portion compression of the carbon heating sheet 100 is ensured.

The winding reel 290 winds the laminated carbon heating sheet 100 at a constant speed.

7 shows a real photograph of a state in which an external connection line is connected to one end of the carbon heating sheet 100 that is adhered and wound as described above.

As described above, in the present invention, since it is packaged and transported in the form of a roll as shown in FIG. 7 , it is easy to load, transport and construct compared to the hard type despite the product having a long length of several tens of meters or more.

In the present invention, the carbon woven network 110 is preferably wrapped with a heat storage layer such as a nonwoven fabric to store heat. In addition, if necessary, the carbon woven network 110 may be treated with a silicone coating as a whole by applying a silicone solution. This can help with electrical insulation and waterproofing.

Meanwhile, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments and should be defined by the claims described below as well as the claims and equivalents.

10, 100: carbon heating sheet
20: crop
30, 110: carbon woven net
112: first side
114: second side
116: carbon coated yarn
118: polyester yarn
119 : Seokdoseon
120: first protective film
122,132: gas barrier layer
124,134: water-blocking layer
126,136: printed layer
128, 138: silicon layer
129, 139: adhesive layer
200: hot melt adhesive
210: frame
220: first supply reel
230: second supply reel
240: third supply reel
250: first guide roller
255: second guide roller
260: heating roller
270: first pressure roller
280: second pressure roller
290: winding roller

Claims (7)

A carbon woven net having a first width, a first surface and a second surface in the form of a band extending long in the longitudinal direction;
a first protective film having a second width wider than the first width, and protecting the first surface of the carbon woven network; and
and a second protective film having the same width as the second width and protecting the second surface of the carbon woven network,
Each of the first and second protective films is
gas barrier layer;
a water barrier layer laminated on the gas barrier layer;
a silicone layer coated on the water barrier layer; and
and an adhesive layer coated on the gas barrier layer opposite to the surface on which the water barrier layer is laminated,
A heated carbon heating sheet in the root winding area in which the first protective film, the carbon woven net and the second protective film are laminated by thermocompression bonding. According to claim 1, wherein the gas barrier layer is a nylon film with good pinhole resistance, the root winding portion heating carbon heating sheet. According to claim 2, wherein the water barrier layer is a PET-based resin root winding portion heating carbon heating sheet. [Claim 4] The heated carbon heating sheet in the root part of claim 3, further comprising an acrylic resin layer between the water blocking layer and the silicone layer. According to claim 1, wherein the adhesive layer is a hot-melt adhesive root winding portion heating carbon heating sheet. According to claim 1, wherein the carbon woven network is a root winding portion heating carbon heating sheet further comprising a heat storage layer having a width smaller than the first width. According to claim 1, wherein the carbon weave network is a silicon-coated root winding portion heating carbon heating sheet.

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