JP2015133287A - floor heating heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor heating heater increased in adhesiveness of a film while securing good PTC characteristics.SOLUTION: A floor heating heater 1 is a band-shaped long object, and configured by forming, on a film 11 on the lower surface thereof, a PTC ink layer 30 serving as a heating element having PTC characteristics, conducting wires 15a, 15b, and electrodes 13a, 13b and by bonding a film 17 to the upper surface thereof. The PTC ink layer 30 is formed in a band shape extending in a longitudinal direction of the heater, and a plurality of the PTC ink layers are disposed in a width direction of the heater with an interval therebetween. The film 17 on the upper surface is directly bonded to the film 11 on the lower surface, between the PTC ink layers 30, in addition to the PTC ink layers 30.

Description

  The present invention relates to a floor heater used for floor heating.

  2. Description of the Related Art As a heating device, one that performs floor heating by laying a sheet-like floor heating heater under the floor or the like is known.

  FIG. 4 is a view showing such a floor heating heater 100. 4A shows a plan view of the floor heating heater 100, and FIG. 4B shows a cross section taken along the line aa in FIG. 4A. The floor heating heater 100 is a strip-like long object, but FIG. 4A shows only a part in the longitudinal direction. In FIG. 4A, the film 17 on the upper surface of the floor heater 100 is not shown.

  In the floor heater 100, a carbon ink layer 20 as a heating element is provided on a film 11 made of PET (polyethylene terephthalate). Positive and negative electrodes 13a and 13b are formed on both sides of the film 11, respectively.

  Conductive wires 15 a and 15 b are formed on the carbon ink layer 20. The conducting wires 15a and 15b are provided so as to extend from the electrodes 13a and 13b in the width direction of the floor heating heater 100 (corresponding to the vertical direction in FIG. 4A, hereinafter referred to as the heater width direction). The conducting wires 15a and 15b are alternately arranged in the longitudinal direction of the floor heating heater 10 (corresponding to the left-right direction in FIG. 4A).

  The upper surface of the floor heater 100 is covered with a film 17 made of PET. An adhesive layer (not shown) such as a hot melt adhesive is provided on the lower surface of the film 17 so that the film 17 is adhered to the carbon ink layer 20 or the like.

  In the floor heating heater 100, when the carbon ink layer 20 between the conductive wires 15a and 15b is energized, the carbon ink layer 20 generates heat, thereby performing floor heating.

  In recent years, cases of using PTC ink having PTC (Positive Temperature Coefficient) characteristics instead of carbon ink as a heating element are increasing (Patent Documents 1 and 2). The PTC characteristic is a characteristic that resistance increases as the temperature rises. The PTC ink can be produced by mixing conductive particles such as carbon black and a resin such as a fluorine resin.

  Since normal carbon ink keeps increasing in temperature when an electric current continues to flow, if a person sits on the floor, heat will be accumulated and the temperature tends to become high, resulting in a decrease in comfort. On the other hand, since the resistance of PTC ink increases and the amount of energization decreases when the temperature rises, the temperature converges to the upper limit value, and problems such as heat accumulation can be prevented. In addition, such a self-temperature adjusting function can reduce the burden of temperature control using a controller, a temperature sensor, or the like, and can reduce the cost of control.

Japanese Patent Laid-Open No. 10-321346 Utility model registration No. 3038310

  However, PTC ink has lower strength as an ink layer than carbon ink. Therefore, when a PTC ink layer is used instead of the carbon ink layer 20 of the floor heater 100 described above, when the peeling force is applied to the film 17, the PTC ink layer is split so that the film 17 is easily peeled off. Since the floor heating heater 100 is rolled up and carried during construction, there is a problem that the film 17 is peeled off at this time and the quality is lowered.

  The above point can be improved by increasing the proportion of the resin of the PTC ink, but there is a problem that the PTC characteristic is impaired and the increase in resistance with a rise in temperature is reduced. Moreover, if the ratio of the resin is increased, the layer thickness of the floor heating heater increases and cannot be rolled up and lowered, resulting in a decrease in workability.

  This invention is made | formed in view of such a problem, The objective is to provide the floor heating heater which improved the adhesiveness of the film, ensuring a favorable PTC characteristic.

  The present invention for achieving the above-described object is a floor heating heater used for floor heating, in which a PTC ink layer, a conductive wire, and an electrode, which are heating elements having PTC characteristics, are formed on a film on the lower surface, A floor heating comprising: a plurality of PTC ink layers arranged at intervals, and a top film adhered to a bottom film between the PTC ink layers. It is a heater.

  In the floor heating heater of the present invention, since the lower film exposed between the PTC ink layers is directly bonded to the upper film, the adhesion of the upper film is ensured, and the film can be prevented from peeling off. Furthermore, since it is not necessary to increase the proportion of the resin in the PTC ink layer in order to prevent peeling of the film, good PTC characteristics can be secured, and the floor heater can be made thin, so that it can be rolled and carried and the workability is also high.

  It is desirable that the floor heating heater is a strip-like long object, and a plurality of the PTC ink layers are arranged at intervals in the width direction of the floor heating heater.

  In this case, the film on the lower surface is exposed along the heater longitudinal direction, and the film on the upper surface and the film on the lower surface are strongly bonded at the exposed portion. Therefore, the adhesive force of the upper film is ensured over the heater longitudinal direction, and the upper film is less likely to peel off.

  The PTC ink layer is formed in a strip shape extending in the longitudinal direction of the floor heating heater, and a positive electrode and a negative electrode are provided along both sides of the floor heating heater, and the conductive wire includes the positive electrode, Each of the negative electrodes is provided so as to extend across a plurality of the PTC ink layers in the width direction of the floor heating heater, the conductive wire provided from the positive electrode, and the negative electrode. It is desirable that the conducting wires are alternately arranged in the longitudinal direction of the floor heating heater.

  In this floor heater, conductive wires extending from each of the positive electrode and the negative electrode are alternately arranged in the heater longitudinal direction, and the PTC ink layer between the conductive wires is energized to generate heat. The PTC ink layer is formed in a strip shape along the heater longitudinal direction and arranged at intervals in the heater width direction, so that the arrangement of the PTC ink layer is adapted to the configuration of such a floor heating heater and the adhesiveness is improved. be able to.

  According to the present invention, it is possible to provide a floor heating heater having improved film adhesiveness while ensuring good PTC characteristics.

The figure which shows the floor heating heater 1 The figure which shows the adhesiveness of the film 17 The figure which shows the floor heating heater 1a The figure which shows the floor heating heater 100

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a view showing a floor heater 1 according to an embodiment of the present invention. 1A is a plan view of the floor heating heater 1, and FIG. 1B is a cross section taken along line AA in FIG. 1A. Although the floor heating heater 100 is a strip-like long object, only a part in the longitudinal direction is shown in FIG. In FIG. 1A, the film 17 on the upper surface of the floor heater 1 is not shown.

  The floor heater 1 is wound and carried at the time of construction, and is cut and laid by an appropriate length. The floor heater 1 is laid on, for example, a heat insulating material under the floor, and a flooring, a soft sheet, a tile, a stone, a carpet, a thin tatami mat, a cork, and the like are laid thereon.

  In the floor heater 1, a PTC ink layer 30 as a heating element is provided on a film 11 made of PET. The PTC ink layer 30 is provided in a plurality of regions 10 in the heater longitudinal direction (corresponding to the left-right direction in FIG. 1A).

  The PTC ink layer 30 is formed by printing PTC ink. As described above, the PTC ink can be manufactured by mixing conductive particles such as carbon black and a resin such as a fluorine resin.

  The PTC ink layer 30 is provided in a strip shape extending in the heater longitudinal direction. A plurality of PTC ink layers 30 are arranged at intervals in the heater width direction (corresponding to the vertical direction in FIG. 1A). The film 11 on the lower surface is exposed between the PTC ink layers 30 adjacent in the heater width direction.

  Positive and negative electrodes 13a and 13b are provided on both sides of the film 11, respectively. The electrodes 13a and 13b are formed by printing silver or the like. Here, the electrode 13a is a positive electrode and the electrode 13b is a negative electrode.

  Conductive wires 15a and 15b are formed on the PTC ink layer 30 with copper foil or the like. The conducting wires 15a and 15b are provided so as to extend from each of the electrodes 13a and 13b across the plurality of PTC ink layers 30 in the heater width direction. The conducting wire 15a provided from the electrode 13a and the conducting wire 15b provided from the electrode 13b are alternately arranged in the heater longitudinal direction.

  Between the areas 10, holes 40 for construction of the floor heater 1 are provided. A plurality of holes 40 are provided in the heater width direction, and the floor heater 1 can be attached to a joist under the floor using these holes 40.

  The upper surface of the floor heater 1 is covered with a film 17 made of PET. As described above, an adhesive layer (not shown) such as a hot melt adhesive is provided on the lower surface of the film 17.

  In the present embodiment, the adhesive layer on the lower surface of the film 17 directly adheres not only to the PTC ink layer 30 but also to the film 11 exposed between the PTC ink layers 30. Since the adhesive layer of the film 17 and the film 11 adhere strongly, the adhesiveness of the film 17 is ensured and peeling of the film can be prevented.

  In FIG. 2, the adhesion of the film 17 in the case where the PTC ink layers 30 are arranged at intervals as in the present embodiment and the PTC ink layer 30 is continuously formed without intervals is shown by a peel test. The measurement results are shown.

  The peel test was measured by a T-peel test defined in KSM (Korean National Standard) ISO 11339 standard corresponding to ISO 11339 (T-peel test of adhesive-soft material bonded portion).

  The T-peeling test is a test in which each adherend is gripped by a gripping tool of a testing machine and moved in a reverse direction at a predetermined speed with respect to a sample in which adherends are bonded to each other. Peel strength. Here, the speed (grasping movement speed) was 10 mm / min, and the temperature and humidity during the test were 23 ± 2 (° C.) and 50 ± 5 (% RH), respectively. The width of the sample was 25 mm.

  “PTC1” in FIG. 2 is a result when the PTC ink layers 30 are arranged at intervals, and “PTC2” is a result when the PTC ink layers 30 are continuously formed without intervals. As shown in the item “Test Results”, the peel strength when the PTC ink layers 30 are arranged at intervals is 77.25 (N / 25 mm), and the peel strength when they are continuously formed without intervals is as follows. It was 41.06 (N / 25 mm). Thus, it was found that the adhesiveness of the film 17 was improved when the PTC ink layers 30 were arranged at intervals.

  The floor heating heater 1 controls on / off of energization to the PTC ink layer 30 between the conductors 15a and 15b by a controller (not shown), and performs floor heating by heat generation of the PTC ink layer 30 accompanying energization. As described above, the PTC ink layer 30 has a PTC characteristic in which the resistance increases as the temperature rises, and the energization amount decreases as the temperature rises. Therefore, the temperature of the PTC ink layer 30 converges to the upper limit value, and there is no problem such as heat accumulation. In addition, such a self-temperature adjusting function can reduce the burden of temperature control using a controller, a temperature sensor, or the like, and can reduce the cost of control.

  As described above, in the floor heating heater 1 of the present embodiment, the lower film 11 exposed between the PTC ink layers 30 directly adheres to the upper film 17, so that the adhesiveness of the upper film 17 is ensured. The film can be prevented from peeling off. Furthermore, since it is not necessary to increase the proportion of the resin of the PTC ink layer 30 in order to prevent the film 17 from being peeled off, good PTC characteristics can be secured, and the floor heater 1 can be made thin, so that it can be rolled and carried and the workability is also improved. high.

  The floor heating heater 1 is a strip-like long object, and a plurality of PTC ink layers 30 are arranged at intervals in the heater width direction. Therefore, the lower film 11 is exposed along the heater longitudinal direction, and the upper film 17 and the lower film 11 are strongly bonded to each other at the exposed portion. Therefore, the adhesive force of the film 17 on the upper surface is ensured over the heater longitudinal direction, and even if the heater longitudinal direction of the floor heating heater 1 is rounded and carried, it is difficult for the film 17 on the upper surface to peel off.

  In the floor heater 1, the conductors 15a and 15b extending from the electrodes 13a and 13b are alternately arranged in the heater longitudinal direction, and the PTC ink layer 30 between the conductors 15a and 15b is energized to generate heat. By forming the PTC ink layer 30 in a belt shape along the heater longitudinal direction and arranging the PTC ink layer 30 at intervals in the heater width direction, the arrangement of the PTC ink layer 30 can be adapted to the configuration of the floor heating heater 1 and bonded. Can increase the sex.

  However, the present invention is not limited to this. For example, the PTC ink is not limited to those described above, and various kinds of conductive particles and resins, or their ratios can be determined in consideration of the PTC characteristics and the strength of the ink layer. For example, it is desirable that the ratio of the conductive particles in the PTC ink is 30% to 50% and the ratio of the resin that is the remainder of the PTC ink is 50% to 70%. This is because when the resin ratio exceeds 70%, the PTC characteristics are impaired, and when the resin ratio is less than 50%, the strength is too low, and the film 17 is easily peeled off due to the splitting of the ink layer as described above. By maintaining the ratio between the conductive particles and the resin within the above range, good PTC characteristics and a certain level of strength can be realized. For example, from the viewpoint of improving the strength to the maximum, the ratio between the conductive particles and the resin is preferably about 30 (%): 70 (%).

  In the present embodiment, the PTC ink layer 30 is provided in a strip shape, but the arrangement of the PTC ink layer 30 is not limited to this. For example, as shown in the floor heater 1a in FIG. 3, the PTC ink layer 30a may be provided in a rectangular tile shape.

  In the example of FIG. 3, the conductors 15a and 15b are alternately arranged in the heater longitudinal direction, but the PTC ink layer 30a is provided only between the conductor 15a and the conductor 15b on one side, and the conductor 15b on the other side Is not provided with the PTC ink layer 30a. Furthermore, the PTC ink layer 30a is provided at an interval in the heater width direction, and the portions where the film 11 on the lower surface is exposed are present in a substantially lattice shape. Even in this case, the upper film 17 adheres directly to the lower film 11 and the adhesion is improved.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these naturally belong to the technical scope of the present invention. Understood.

1, 1a, 100... Floor heater 10... Area 11, 17. PTC ink layer

Claims (3)

A floor heater used for floor heating,
A PTC ink layer that is a heating element having PTC characteristics, a conductive wire, and an electrode are formed on the lower film, and the film is adhered to the upper surface.
A plurality of the PTC ink layers are arranged at intervals,
A floor heating heater, wherein an upper film is bonded to a lower film between the PTC ink layers. The floor heater is a strip-like long object,
The floor heating heater according to claim 1, wherein a plurality of the PTC ink layers are arranged at intervals in the width direction of the floor heating heater. The PTC ink layer is formed in a strip shape extending in the longitudinal direction of the floor heater,
A positive electrode and a negative electrode are provided along both sides of the floor heater,
The conducting wire is provided so as to extend from each of the positive electrode and the negative electrode across the plurality of PTC ink layers in the width direction of the floor heater.
The floor heating heater according to claim 2, wherein the conducting wire provided from the positive electrode and the conducting wire provided from the negative electrode are alternately arranged in a longitudinal direction of the floor heating heater.

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