KR101816519B1 - Insulating coating method for heating element - Google Patents

Abstract

The present invention relates to an insulating method which enhances an insulation of a planar heating element. In general, since PET films used as an insulating material of a planar heating element are not bonded to any other resins after molded at least once, a method, which uses an adhesive to attach PE resins, ages the same, then extrudes the same in a gel phase state through an extruder and attached the aged film, can be used only at a low temperature area because of characteristics of the adhesive and a low heat resistance of PE resins. Moreover, the insulating method has strong strength but no flexibility. To solve such problems, the insulating method of the present invention manufactures a flexible PET by making a PET having excellent heat resistance, durability, and dehumidification a base, coats in a dual insulation with a high strength PET and a flexible PET resin, such that there is no surface imbalance which is generated when withstand voltage of a heating yarn is destroyed because an insulating surface of the heating yarn becomes thin when a molten resin for forming insulation films is directly extruded and pressed to a surface of an existing planar heating element, or when being laminated. In addition, the method uses a base film (100) to insulate again, such that durability is enhanced because of the double insulation. The method solves a problem which a protective film is detached by heat because an adhesive is not used, such that an upper insulating plate and a lower insulating plate are fixedly fused more than adhering by an adhesive. Since attachment and aging process are removed, a manufacturing cost is reduced, and heat resistance and durability are increased. The method comprises the steps of: preparing the base film by extruding the high strength PET and flexible PET at the same time; fusing the high strength PET and flexible PET; laminating the base film to a fabric (130) of the planar heating element; and laminating and coiling the laminated base film, melted flexible PET, and the fabric of the planar heating element.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an insulation method having a high strength and flexibility,

The present invention relates to a method for inspecting both sides of an area heating element, and more particularly, to a method of inspecting both sides of a area heating element by providing a base film on both surfaces of a continuously supplied surface heating element and supplying a molten polymer resin, which is extruded from the extruder, And the insulation film is adhered to both surfaces of the surface heat emission element with good adhesion.

As shown in Fig. 1, insulating insulating films 1 and 3 made of an insulating synthetic resin film are coated on both side surfaces of a sheet-like heat generating element to electrically insulate the surface heat generating element 2 from electrical insulation And is constructed to be waterproof.

The insulating film may be generally formed of a polymer synthetic resin such as PET, PVC, or TPU. Conventional surface heating elements are laminated by applying an adhesive to an insulating film such as PET, PVC or TPU, placing them on both sides of the surface heating element and thermo-compressing, and extruding the polymer synthetic resin through an extruder (T-DIE) .

However, in the conventional insulation methods of the surface heat emission element, a method of applying a reinforcing agent and an adhesive to the insulation film and thermo-compression, or extruding the gel polymer resin by an extruder, and then laminating the film with the surface heating element The film coating process was difficult and there were many problems such as insulation breakdown.

Due to such a problem, the heat is not evenly distributed in the case of thermocompression, and therefore, the laminate is not formed or due to the characteristics of the extrusion method, the exothermic yarn penetrates the extruded sheet and the insulation portion of the extruded sheet becomes very thin, There is a problem that the function is lost.

In addition, when the PET film is once molded in the heat resistance of the insulating material, it does not adhere to any other resin. Therefore, the PE resin is attached using an adhesive, aged, and then extruded in a gel state through an extruder to adhere the aged film Method has very low heat resistance of adhesive and PE resin, so it can be used only in low temperature range. In addition, the above insulation method has a high rigidity but is not flexible, which is very inconvenient for heating.

In addition, the problem of conventional laminating is that a method of attaching a surface heating element to one surface and laminating one surface that is not insulated by the secondary operation is adopted, and the gel is not completely adhered to the surface.

Patent Registration No. 10-0488479 Published Japanese Patent Application No. 10-2013-0004532

The present invention solves the problems of the conventional method of insulating a surface heating element as described above. The present invention provides a base film by simultaneously extruding a flexible PET resin without using an adhesive for a high strength PET resin to produce a flexible surface heat generating element And a flexible PET resin is extruded between the planar heating element and the base film through an extruder to form a base film so that the flexible PET resin faces the planar heating element and the planar heating element can be provided with high heat resistance and flexibility simultaneously. The purpose is to provide.

The method for inspecting a planar heating element according to the first embodiment of the present invention has a high strength and flexibility. The method comprises: preparing a base film by simultaneously extruding the high strength PET and the flexible PET; fusing the high strength PET and the flexible PET; Bonding the base film (100) to the heating body fabric (130), and winding the laminated base film, the melted flexible PET, and the face heating body together.

The method of insulating the planar heating element according to the second embodiment of the present invention with high strength and flexibility includes a step of producing flexible PET and a step of forming a high strength and a high strength in a molten state which is extruded while simultaneously extruding the high strength PET and the flexible PET without using the base film PET and the flexible PET polymer resin are laminated with the surface heating element body, and a surface heating element insulated by simultaneous extrusion of the high strength PET and the flexible PET is wound on at least one surface.

The method of manufacturing a flexible printed circuit board (PCB) according to a third embodiment of the present invention includes steps of fabricating flexible PET, forming a busheess film by simultaneously extruding high strength PET and flexible PET, The flexible PETs 102 are arranged so as to face each other, and then the surface heating element yarns are thermally fused together while being passed between the heated thermal rollers 170 at a temperature of about 180 ° C to 280 ° C to join both surfaces.

In the insulating method having high strength and flexibility of the planar heating element according to the first and second embodiments of the present invention, the high strength PET and the flexible PET are coated on both surfaces of the planar heating element body.

In the method for producing a flexible PET according to the first to third embodiments of the present invention, a plasticizer is added to reinforce the flexibility of the glycol-modified PET resin so that the glycol-modified PET resin The plasticizer to be used herein may be a resin selected from any one of tri-butoxyethyl phosphate or diacetyl monododecanoyl glyceride, And mixed to produce flexible PET.

The insulating method having the high strength and flexibility of the planar heating element according to the present invention is a method in which a molten resin for forming an insulating film is directly extruded on the surface of a conventional planar heating element by using a PET having excellent heat resistance, durability and moisture- The insulation surface of the heat-generating yarn portion caused by the compression is thinned, so that the withstand voltage of the heat-generating yarn is destroyed or the surface imbalance that occurs when the jointing occurs is eliminated, and the durability due to the double insulation is strengthened by inserting again using the basic base film There is an effect that the problem that the protective film is dropped by heat without using an adhesive is improved.

In addition, the molten resin for forming an insulating film is directly extruded on the surface of the surface heating element, and the surface of the surface coating of the insulating film is pressed and uneven so that the withstand voltage is prevented from breaking and the insulation of the surface heating element is not destroyed.

According to the insulation method of the present invention, when the molten resin for insulation formation is directly extruded on the surface of the plane-shaped heating element to allow it to permeate between the heating yarns, a large amount of the molten resin should be added to the conventional extrusion method, There is an advantage that occurrence suppression, withstand voltage and insulation breakdown can be prevented.

1 is an exploded perspective view showing a structure of a conventional planar heating element;
FIG. 2 is a plan view of a base film for insulating a planar heating element according to the present invention. FIG.
Figures 3 to 9 are schematic views of a coating apparatus according to the present invention.

Hereinafter, an insulating method having high strength and flexibility of the planar heating element according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

A method of inspecting a planar heating element according to the present invention includes the steps of preparing a base film by simultaneously extruding high strength PET and flexible PET, melting the flexible PET, and extruding the flexible PET polymer resin in an extruded state, Winding the flexible PET PET polymer resin and the base film in a molten state which is extruded from one side of the non-insulated one side, and winding the same.

Fig. 2 shows an apparatus for manufacturing a base film for insulation of an area heating element according to the present invention.

The step of simultaneously extruding the high-strength PET and the flexible PET to prepare the base film is performed by extruding high-strength PET and flexible PET.

High-strength PET used in this step uses amorphous PET for transparency. The amorphous PET is soft and tough because it is not crystallized, but it has the advantage of not lowering its strength even at low temperatures. In the present invention, amorphous PET is used because it does not block the far-infrared ray in the far-infrared ray radiation emitted from the planar heating element and can increase the surface strength and strengthen the scratch.

On the other hand, glycol-modified PET is used as flexible PET. However, since glycol-modified PET is also strong, it is difficult to apply it to a surface heating element. For this reason, flexible PET is produced more flexible than glycol-modified PET by injecting plasticizer and additives to reinforce flexibility in glycol-modified PET.

As the plasticizer used herein, any one of tri-butoxyethyl phosphate or diacetyl monododecanoyl glyceride may be selected or used in combination.

As the additive, acrylic acid, styrene, xylene, glycidyl methacrylate and the like can be used.

In the step of fusing the high-strength PET and the flexible PET, the high-strength PET is first cast into a single die 120 having two layers in the form of a dry pellet through the first extruder 110 to melt 101a, And the flexible PET is further extruded in a dry state through the second extruder 111 to melt at a melting temperature (102a) to form a layer.

Referring to FIG. 2, the sheet coming out from the die 120 is extruded while forming a sheet with a fully fused body while forming two layers, and then extruded into a sheet shape while adjusting its thickness through a three-roll calender A base film fused with high-strength PET and flexible PET is prepared by winding it on a winding roll.

At this time, the amount of extruded from the first extruder and the amount of extruded from the second extruder may be the same or different. In the present invention, the extrusion ratio of the high strength PET and the flexible PET is 1: 5 in order to enhance the flexibility. In the present invention, 20 parts by weight of the high strength PET (101) Is suitably 80 parts by weight. The ratio may vary depending on the thickness of the yarn. The base film formed in this manner has a stronger durability than that of the conventional adhesive, and the manufacturing cost is remarkably reduced.

Although the base film according to the present invention has two layers as an example, the present invention is not limited thereto, and PET of different states may be composed of three to eight layers depending on the application.

In the step of joining the base film 100 to the surface heating body 130, the same material as that of the flexible PET is used to join the surface of the surface heating body and the base film in order to join the base film. To this end, the flexible PET is melted from the extruder, and the melted flexible PET is discharged between the base of the surface heating element and the base film.

First, a flexible PET material in the form of a dry pallet is sent to an extruder, melted at a melting temperature in an extruder, and then the flexible PET material in a molten state is extruded from the die. Finally, the dice 120 are extruded in the form of a gel-like sheet 102a.

On the other hand, one side of the base film is made of high-strength PET, and the other side of the base film is made of flexible PET. Referring to FIG. 3, a flexible PET of gel is extruded at a portion where the other side of the base film on which the flexible PET is formed faces the planar heating element.

In the step of laminating the laminated base film, the molten flexible PET, and the surface heating element fabric together, the base film 100 composed of the high strength PET and the flexible PET is rolled into an unwinder for adjusting the tension, do. Also, the surface heating element fabric is wound and arranged in a roll form on an unwinder capable of tension adjustment. At this time, the flexible PET of the base film is arranged so as to be opposed to the surface heating element. A die 120 is disposed on the lower side between the base film and the unwinder wound with the surface heating element fabric.

Referring to FIG. 3, the gel-like flexible PET sheet 102a descends in the die, and the base film 100 and the surface heating element body 130 are joined together. Such a lap is made in a three-roll calender, in which the center roll and the right roll are pressed against each other in a three-roll calender for a rigid lap.

Finally, the bonded base film and the surface heating element fabric are wound on a winder 160 capable of adjusting the tension.

As described above, only one side is insulated by the base film and the other side is not insulated. In order to insulate the other side of the non-insulated area heating element, the surface of the non-insulated area heating element is placed in a tension adjustable winder facing the base film, and the gel-like flexible PET sheet is discharged from the die.

Next, the base film is disposed so as to be opposed to the flexible PET on the un-winder capable of controlling the tension, and the dice are disposed therebetween. One side of the base film 100 is insulated from the gel film The pressure is applied in the three roll calenders 140 so that the surface heating element fabric is solidly lapped, and then wound on a winder capable of tension adjustment to complete the insulation.

The above and other objects, features, and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

≪ Example 1 >

As shown in FIG. 4, the following <Embodiment 1> is a schematic view for simultaneously joining both sides.

The two-sided lamination apparatus has almost the same structure as the one-sided coating apparatus of FIG. 3, but has two dies, which are composed of a first die 121 and a second die 122, And are arranged to face each other in the flexible PET direction. The arrangement order is arranged from left to right in the order of the first base film 100a, the first die 121, the surface heating body 130, the second die 122 and the base film 100b, Respectively.

At this time, in order to pressurize the three roll calenders 140 so that the first base film, the surface heating element fabric, and the second base film are tightly joined, a steel roller and a silicone or urethane roller are mixed The three roll calenders are composed of a first roller 141, a second roller 142 and a third roller 143 in this order. The first roller 141 and the second roller 142 are cooling steel rollers and the three rollers 143 A rubber roller such as silicone or urethane is used. If only a steel roller is used, pressurization is not properly performed at the time of pressurization, which may cause problems such as defective lapping. Therefore, one of the two rollers to be pressurized must be urethane, Should be used.

&Lt; Example 2 &gt;

As shown in FIG. 5, the following <Embodiment 2> is a schematic view for cross-sectioning sections without using a base film.

As shown in FIG. 2, in the cross-sectional lamination apparatus, the high-strength PET is in the form of a first pellet in a dry state through one die 120 having two layers, which is sent through the first extruder 110 to melt at a melting temperature, The flexible PET is also extruded in a dry state through a second extruder 111 to melt at a melting temperature to form a layer to form two layers while forming a completely fused sheet, And wound around the winding roll 160 while being joined to the surface heating element body 130. [

As described above, since one side of the insulated one-sided heating element is insulated from the insulated one, the uncoated side is relocated to the un-winder whose tension is adjusted in the direction of the die 120, And is wound on the winder by the same process as above.

In the present invention, in order to enhance the flexibility, the extrusion ratio of the high strength PET and the flexible PET is 1: 5 in order to enhance the flexibility of the extruder. The three roll calenders to which the extrusion sheet is pressed are constituted in the order of 1 roller 141, 2 rollers 142 and 3 rollers 143, 1 roller and 2 rollers are cooling steel rolls, and 3 rollers are made of silicone The surface 101a of the high strength PET is rapidly cooled by the two rollers made of urethane or the like and hardened by forming the hardness so that the surface heating element yarn pierces the side of the flexible PET 102a, So that the dielectric strength can be strengthened, and the insulation method can be drastically improved such that the surface heating element yarn pierces the resin and the insulation becomes thin.

Accordingly, the gel-like high-strength PET 101a has a technical feature of rapidly solidifying but also maintaining flexibility of the gel-like flexible PET 102a, so that the surface heating element yarn is molded well.

&Lt; Example 3 &gt;

As shown in FIG. 6, the following <Embodiment 3> is a schematic view for simultaneously joining both sides without using a base film on both sides.

The double-sided laminating apparatus has almost the same structure as the single-sided coating apparatus of Fig. 5, but the dice of Fig. 2 are composed of two dice 121 and two dice 122, And the arrangement order is arranged in the order of the first die, the surface heating element body, and the second die, so that both surfaces are joined together in a single step.

The above process is very difficult and the first extruder and the second extruder extrude into the first die, and the third extruder and the fourth extruder extrude into the second die. In this case, the shape to be extruded is made symmetrical with respect to the high-strength PET, the flexible PET, the surface heating element fabric, the flexible PET and the high-strength PET in the order of the surface heating element fabric

The three roll calenders 140 to which the extruded sheets are pressed are constituted by a roller, a roller and a roller in the following order: one roller and two rollers are cooling steel rolls and three rollers are made of rubber rolls such as silicone or urethane. In addition, the 3 rollers must also constitute cooling, and usually a cooling device called a chiller is provided to rapidly cool it. The surface of the high-strength PET contacted with the cooling roller rapidly cooled, but the flexible PET maintains the gel state, so that only the flexible PET portion is digested, and the upper and lower surfaces are fused so that the withstand voltage is strengthened and the surface heating element yarn pierces the resin. It is possible to drastically improve the conventional insulation method such as thinning. Therefore, the high strength PET has a technical feature that the PET is kept in a gel state while hardening rapidly, and the surface heat emitting body yarn is molded well.

<Example 4>

As shown in FIG. 7, the following fourth embodiment is a schematic view for simultaneously joining both surfaces.

The two-sided laminating apparatus has almost the same structure as the one-sided coating apparatus of Fig. 3, except that the two dice are composed of the first dice 121 and the second dice 122, and the three roll calendars are arranged in the first three roll calenders 140- 1) and a second 3-roll calendar 140-2, and both sides are joined together in a single step through respective steps.

&Lt; Example 5 &gt;

As shown in FIG. 8, the following <Embodiment 5> is a schematic view for simultaneously joining both surfaces in one step and two steps.

The two-sided lamination device has almost the same structure as that of Example 3), but the dice of Fig. 2 is composed of two dice 121 and second dice 122, and the three-roll calender is the first three roll calenders 140 -1) and a second 3-roll calendar 140-2, and both the first and second roll calendars 140-1 and 140-2 are jointed together by performing one step and two steps at the same time.

&Lt; Example 6 &gt;

As shown in FIG. 9, the following sixth embodiment is a schematic view for simultaneously joining both surfaces using a thermal roller.

In the thermo-compression double-sided lamination device, the base film 100 composed of the high-strength PET and the flexible PET extruded in the die of FIG. 2 is arranged so that the flexible PETs 102 face each other, (170, 171), so that both surfaces are joined together.

Through the above manufacturing process, the insulated surface heating element has excellent appearance, and it is technically possible to remarkably improve the deterioration of the adhesive surface which has been problematic in the conventional coating method, the failure of the withstand voltage due to the peeling of the surface heating element body during insulation, Feature.

1: lower insulating sheet 2: planar heating element,
3: upper insulating sheet
100: base film 100a: first base film
100b: second base film 101: high strength PET
102: Flexibility PET 101a: Gel-like high strength PET
102a: Gel-like flexible PET 110: First extruder
111: Second extruder 112: Third extruder
113: fourth extruder 120: die
121: first dice 122: second dice
130: Surface heating element fabric 140: 3 roll calenders
140-1: the first three roll calendars 140-2: the second three roll calendars
150: Tension Laura 151: Guide Laura
160: One-sided support team 170: First row Laura
170: Second column row

Claims (5)

In an insulation method having high strength and flexibility of an area heating element,
Producing flexible PET;
A step of simultaneously extruding the high-strength PET and the flexible PET to form the base film 100, the step of melting the flexible PET,
And a step of winding a planar heating element which is insulated by simultaneously extruding the high-strength PET and the flexible PET on at least one surface of the flexible PET polymer resin in a molten state, which is extruded and joined to the base film and the planar heating element body, High strength and flexible insulation.
In an insulation method having high strength and flexibility of an area heating element,
Producing flexible PET;
The high strength PET and the flexible PET polymer resin which are extruded while simultaneously extruding the high strength PET and the flexible PET without using the base film are laminated with the surface heating element body and are insulated by simultaneous extrusion of high strength PET and flexible PET on at least one side And a step of winding the planar heating element.
3. The method according to claim 1 or 2,
In the step of producing flexible PET, flexible plastic resin can be made more flexible than glycol-modified PET resin by injecting plasticizer to reinforce flexibility in glycol-modified PET resin. As the plasticizer used, tributoxyethyl phosphate ( Tri-butoxyethyl phosphate or diacetyl monododecanoyl glyceride, or a mixture thereof to produce a flexible PET. The method of claim 1, wherein the flexible PET is selected from the group consisting of tri-butoxyethyl phosphate and diacetyl monododecanoyl glyceride.
3. The method according to claim 1 or 2,
Wherein the high-strength PET and the flexible PET are coated on both sides of the surface heating element body, and the method has high strength and flexibility.
In an insulation method having high strength and flexibility of an area heating element,
Producing flexible PET;
A step of simultaneously extruding high-strength PET and flexible PET to form a base film;
The base film 100 is arranged so that the flexible PETs 102 face each other and then the surface heating element yarns are thermally fused together while being passed between the heating and heating rollers 170 heated to 180 ° C. to 280 ° C. together, Wherein the surface heat generating element has a high strength and flexibility.

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