JP5048435B2 - Exothermic resin sheet and manufacturing method thereof - Google Patents

Description

  The present invention relates to a heat generating resin sheet provided with a heating wire, and a method for manufacturing the same.

  A polycarbonate plate is used as a base material such as a window for a vehicle instead of a glass material as a hard resin material. On the other hand, technologies related to defogging with heating wires arranged as windows for vehicles are known. In any technology, glass is used as a base material for windows. Glass is highly resistant to temperature and can bake a heating wire, but the polycarbonate plate is a resin and melts at a relatively low temperature of 120-250 ° C., so it is difficult to apply the technology in the glass window.

  For example, Patent Document 1 discloses a technique of embedding a resistance wire in a resin sheet, which is a polyvinyl petital polymer, and utilizing it for anti-fogging of an automobile window. It is not a base material but a sheet that provides an irregular pattern of resistance wires sandwiched between glasses.

  That is, in Patent Document 1, in order to make an irregular pattern using a resin sheet, the thermoplastic resin sheet is slackened, and the resistance wire is also slackened, and both are brought into contact with each other to cause electric energy to the resistance wire. In this case, the resistance wire is embedded in the portion where the thermoplastic resin sheet and the resistance wire are in contact with each other (the point contact is made because both of them are slackened). And an irregular pattern is formed when a thermoplastic resin sheet shrinks. Further, the portion where the resistance wire protrudes from the thermoplastic resin sheet is compressed when sandwiched by glass to form a more irregular pattern.

On the other hand, as a heat generating resin sheet using a polycarbonate plate as a base material and embedding a heating wire for melting snow on the surface of the polycarbonate plate, there is one disclosed in Patent Document 2, for example. . According to this exothermic resin sheet, in order to attach a heating wire in polycarbonate, a hollow structure in which a plurality of polycarbonate plates are processed and combined is prepared in advance, and the heating wire is arranged with a partition in the hollow structure portion. Is.

In such a heat-generating resin sheet, the air present in the hollow structure acts as a heat insulating material, which becomes an obstructive factor in conducting the heat generated by the heating wire to the surface of the polycarbonate plate. Surface defrosting and snow melting are not performed efficiently. Incidentally, the thermal conductivity of air is about 29 mW / m · k, and the thermal conductivity of the polycarbonate resin is about 190 mW / m · k. Moreover, transparency that can be replaced with glass for windows cannot be expected from the structure.
Japanese Patent Laid-Open No. 50-3111 Noto 3029638

  The present invention provides a heat generating resin sheet that is particularly useful when used on a see-through surface portion of a vehicle window and that can efficiently remove frost on the surface and melt snow on the surface. It is another object of the present invention to provide a method for producing the exothermic resin sheet.

  In order to achieve the above object, an exothermic resin sheet according to the invention of the present application is such that the heating wire is densely embedded in at least one surface of a transparent thermoplastic resin sheet and is substantially the same as the heating wire on the one surface. A part of an arbitrary cross section in the full length range is continuously exposed to the outside of the one surface, and a hard coat layer made of a material harder and more thermally conductive than the thermoplastic resin sheet has at least the one surface. It is formed to cover.

  Moreover, the manufacturing method of the exothermic resin sheet by this invention presses this heating wire on the surface of a polycarbonate resin sheet with the pressure plate in the state which sent the electric current to the heating wire and was made into the temperature within the range of 120-250 degreeC. By doing so, the substantially full length range of the heating wire on the one surface is embedded in a continuous manner so that a part of the cross section is continuously exposed outward and hardly protrudes from the one surface. Is.

  According to the heat generating resin sheet according to the present invention, Joule heat generated by energizing the heating wire is conducted to the flesh portion of the polycarbonate resin sheet through the contact surface in close contact with almost the entire surface of the heating wire embedded portion. Furthermore, not only is it conducted to the surface of the polycarbonate resin sheet through the meat part, but also the hard coat layer made of a heat conductive material better than the polycarbonate resin, the Joule heat generated by the heating wire is separated from the heating wire. Conductive diffusion can be effectively performed up to the polycarbonate resin sheet.

  In addition, according to the method for producing a heat generating resin sheet according to the present invention, the portion of the surface of the thermoplastic resin sheet that is in contact with the heating wire is melted by the Joule heat generated by the heating wire, and is pressed by the pressing plate, When the heating wire is embedded in the melted portion and the pressing plate is pressed to reach the surface of the thermoplastic resin sheet, it becomes impossible to further embed the heating wire. Can be embedded in such a manner that a part of the surface is continuously exposed to the outside and hardly protrudes from the surface.

  Due to the effects as described above, it can be used effectively as a window material, door material, wall material, floor material, etc. that require heating with a heating wire, and in particular, a perspective view of a vehicle window (such as a cabin window of a work vehicle). It is useful when used on face areas.

  Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment>
FIG. 1 is an explanatory view showing a manufacturing process of a heating wire pressure-sensitive adhesive sheet, and FIG. 2 is a perspective view showing the heating wire pressure-sensitive adhesive sheet.

  A transparent heat-resistant adhesive film 1 based on PET (polyethylene terephthalate) or polyimide is prepared. The film 1 is selected to have an adhesive surface on one side and heat resistance so that it does not melt at least by heating at about 150 to 250 ° C., and the adhesive material can withstand the same temperature. Moreover, what can be easily peeled from the object to which the heat-resistant adhesive film 1 is adhered is selected as the adhesive on the adhesive surface.

  On the other hand, the heating wire adhesive sheet manufacturing tool 2 is prepared. The manufacturing tool 2 forms a jig plate 3 having a flat upper surface, and a plurality of post members 4a are provided in one row on the upper surface of the jig plate 3 so as to be vertically movable. A plurality of post members 4b arranged in a staggered arrangement with respect to the arrangement of the post members 4a at the one end portion are provided on the other end portion of the first end plate so as to be movable up and down, and a first pressing plate is provided above the jig plate 3 5 is configured to be movable up and down.

  Then, a single heating wire 6, that is, a nichrome wire having a diameter of about 0.05 to 0.5 mm (80 parts by weight Ni-20 parts by weight Cr) is folded into ninety-nine folds on the left and right post members 4a and 4b. It is hung and positioned on the jig plate 3 so as to obtain a pre-designed pattern (planned pattern) in which a large number of linear portions 6a are arranged in parallel. Next, the adhesive surface of the square heat-resistant adhesive film 1 having a size corresponding to the jig plate 3 is attached to the upper end surfaces of the left and right post members 4a and 4b. Next, the pressing plate 5 is moved downward through driving means such as a fluid pressure cylinder device (not shown), and the left and right side post members 4 a and 4 b are simultaneously displaced downward with respect to the jig plate 3. Then, after the first pressing plate 5 presses the heat-resistant adhesive film 1 against the upper surface of the jig plate 3, the left and right end post members 4 a and 4 b are displaced downward from the upper surface of the jig plate 3.

  As a result, the entirety of the heating wire 6 except for the terminal portion 6b is pressed against the adhesive surface of the heat-resistant adhesive film 1 and stuck to and fixed thereto. Next, the first pressing plate 5 is moved upward, and the heat-resistant adhesive film 1 is taken up together with the heating wire 6 from the upper surface of the jig plate 3. And finally, the peeling film 7 is stuck on the adhesive surface of the heat resistant adhesive film 1 in a state where the whole excluding the terminal portion 6b of the heating wire 6 is covered. Thereby, the heating wire adhesive sheet 8 as shown in FIG. 2 is created. The heat-resistant adhesive film 1 may be manually pressed against the upper surface of the jig plate 3 without using the first pressing plate 5.

The heating wire pressure-sensitive adhesive sheet 8 may be prepared as follows.
That is, an electrothermal material film made of nichrome having a thickness of about 0.2 mm is attached to the transparent heat-resistant adhesive film 1, and punching is performed only on the electrothermal material film using a Thomson mold or the like. The electrothermal material film portion is peeled off from the heat resistant adhesive film 1. As a result, the heating wire 6 made of nichrome remains on the adhesive surface of the heat-resistant adhesive film 1 in a state of being arranged and adhered in a planned pattern. After that, the release film 7 is stuck to the adhesive surface of the heat-resistant adhesive film 1 in a state where the heating wire 6 is covered, similarly to the above.

  FIG. 3 is an explanatory view showing a process of adhering the heating wire adhesive sheet 8 to the thermoplastic resin sheet (polycarbonate resin sheet) 9, and FIG. 4 is a diagram showing a state where the heating wire adhesive sheet 8 is attached to the thermoplastic resin sheet 9. 1 is a perspective view showing one intermediate product 10. FIG. As shown in FIG. 3, the state in which the release film 7 is peeled off from the heating wire pressure-sensitive adhesive sheet 8 is placed on the polycarbonate resin sheet 9 while being aligned, and then the heat-resistant pressure-sensitive adhesive film 1 Is pressed to the upper surface of the polycarbonate resin sheet 9 by hand or the like and pasted through the adhesive force of the adhesive surface of the heat-resistant adhesive film 1 to produce the first intermediate product 10 shown in FIG.

  FIG. 5 is an explanatory view showing a process of applying a pressing force to the upper and lower surfaces of the first intermediate product 10 via a second pressing plate (for example, a polycarbonate resin plate) 11 made of a non-conductive material, and FIG. It is explanatory drawing which shows the process to do. As shown in FIG. 5, the second pressing plate 11 is positioned on the upper surface of the heat-resistant adhesive film 1, and a pressing force is applied to the second pressing plate 11 by a press machine including a fluid pressure cylinder device (not shown). The heat-resistant adhesive film 1 is pressed against the upper surface of the polycarbonate resin sheet 9. At this time, the pressing plate portions 11a and 11b that are directly above the portion where the pressing force by the second pressing plate 11 is not to be applied, such as the terminal portion 6b of the heating wire 6, are excised in advance.

Then, as shown in FIG. 6, the DC power supply device 13 is connected to each end portion 6 b of the heating wire 6 through the conductive wires 12 a and 12 b, so that the surface temperature of the heating wire 6 is about 200 ° C. The power supply voltage of the power supply device 13 is adjusted. The surface temperature of the heating wire 6 with respect to the voltage may be measured in advance with a thermocouple, an infrared non-contact thermometer or the like, and the calorific value (power consumption) becomes a desired value with respect to the length of the heating wire 6. In this way, the voltage and current may be set. Under this state, the second pressing plate 11 is pressed downward by a press machine, and the heat-resistant adhesive film 1 and the heating wire 6 are pressed against the polycarbonate resin sheet 9. At this time, the pressure of the second pressing plate 11 against the heat-resistant adhesive film 1 is desirably set in a range of about 1 MPa to 100 MPa (0.1 kg / cm ^{2 to} 10 kg / cm ² ). The pressing time depends on the temperature, but is about 10 to 30 seconds. When the heating wire 6 is pressed by the second pressing plate 11, the heating wire is embedded in the melted portion, and the second pressing plate 11 is pressed until reaching the surface of the polycarbonate resin sheet 9. Since the heating wire 6 cannot be embedded further on the surface of the sheet, the heating wire 6 is continuously exposed and a part of the cross section is continuously exposed to the outside, and is hardly protruded from the surface of the sheet 9. Can be embedded. On the other hand, when the pressing time is short, the heating wire 6 is not sufficiently embedded, and when the hard coat layer is formed later, the coating state of the hard coat layer on the polycarbonate resin sheet 9 becomes uneven.

  During the energization process to the heating wire 6, Joule heat generated by the heating wire 6 escapes to the second pressing plate 11 through the heat resistant adhesive film 1, and the surface temperature of the heating wire 6 is lowered. Since the heat transfer coefficient of the polycarbonate resin sheet 9 is lower than the heat transfer coefficient of the second pressing plate 11, the heat generated in the heating wire 6 is only in the part where the heating wire 6 is in contact with the polycarbonate resin sheet 9. Applied and less diffused into the sheet 9. For this reason, only the part in which the heating wire 6 is embedded is melted.

  In order to use such an action from the beginning of the treatment, the second pressing plate 11 is previously displaced downward and brought into contact with the upper surface of the heat-resistant adhesive film 1 as shown in FIG. Energize to heat the heating wire 6. If it does in this way, before making the 2nd press board 11 contact the heat resistant adhesive film 1, inconveniences, such as the heating wire 6 becoming abnormally high temperature and melting the heat resistant adhesive film 1, are avoided.

  7 is a perspective view showing a state in which the heating wire 6 is embedded in the polycarbonate resin sheet 9, and FIG. 8 is a cross-sectional view showing the aa portion of FIG. After the pressing time has elapsed, when the second pressing plate 11 is displaced upward and the heat-resistant adhesive film 1 is peeled off, the second intermediate product 14 shown in FIG. 7 is formed. At this time, since the upper part of the heating wire 6 is not covered with the meat part of the polycarbonate resin sheet 9, the uppermost part is exposed to the outside as shown in FIG. At this time, only the upper surface of the heating wire 6 is exposed and most of the remaining portion is densely embedded, so that the heating wire 6 falls off the polycarbonate resin sheet 9 even if the heat-resistant adhesive film 1 is peeled off. Nothing happens.

  Next, a transparent methyl methacrylate resin (commonly called acrylic resin) -based paint is applied by a dipping method. In order to ensure weather resistance against ultraviolet rays, UV paint is added to the paint, and ceramic particles such as ATO (antimony-doped tin oxide) and ITO (tin-doped indium oxide) are added to provide a shielding effect against infrared rays. It may be dispersed. Films are formed on the upper and lower surfaces of the polycarbonate resin sheet 9 of the second intermediate product 14 by the dip coating film forming action. The second intermediate product 14 in the state where the dip-type coating process has been completed is heated and dried in an atmosphere of 130 ° C. for about 60 minutes, immersed in a siloxane-based paint, and then condensed by heating and drying at about 120 ° C. The chemical reaction proceeds.

  FIG. 9 is a perspective view showing the third intermediate product 15 in a state where the condensation reaction has been completed. A silicon hard coat layer 16 harder than the polycarbonate resin sheet 9 is formed on the upper and lower surfaces of the third intermediate product 15. The underlying acrylic resin film forms a primer layer (same as the layer indicated by reference numeral 16a in FIG. 19) to maintain the adhesion between the polycarbonate resin sheet 9 and the silicon-based hard coat layer 16, or to expand the heat. This contributes to preventing the occurrence of cracks due to the difference. The film thickness of the silicon-based hard coat layer 16 and the primer layer is affected by the viscosity and density of the paint, the pulling speed during immersion, the environmental temperature, and the like, but each is about several μm.

  FIG. 10 is a perspective view showing a heat generating resin sheet 17 as a product. The connection terminal 18a, 18b made of nickel or chromium is attached to the third intermediate product 15 shown in FIG. 9, and the heat generating resin sheet 17 shown in FIG. 10 is completed. The connection terminals 18a, 18b and the heating wire 6 are They are connected by spot welding or screwing.

  Polycarbonate resin generally has a property that it is difficult to transmit heat but is easy to heat because it has a thermal conductivity of about 1/5 and a heat capacity per unit volume of about 65% compared to glass used as a window material. The thermal conductivity of the acrylic resin constituting the primer layer is substantially the same as that of the polycarbonate resin, but the silicon-based hard coat layer 16 can have thermal conductivity equivalent to that of glass and is close to the heating wire 6. The Joule heat of the heating wire 6 is effectively conducted through the heated portion, the temperature rise of the hard coat layer 16 and the polycarbonate resin sheet 9 at a position away from the heating wire 6 is promoted, and the temperature of the entire heat generating resin sheet 17 is made uniform. It shows the function to make. Therefore, the hard coat layer 16 on the side where the heating wire 6 is embedded works effectively in removing frost and cloudiness on the surface of the heating wire 6 and melting snow, and further cooperates with the hard coat layer 16 on the opposite side. Even if it takes some time to remove fogging and frost on the opposite surface, a sufficient temperature rise effect can be obtained.

  FIG. 11 shows the case of the exothermic resin sheet 17 according to the present invention in which the thickness of the polycarbonate resin sheet 9 is 5 mm, and the case where the polycarbonate resin sheet 9 of the exothermic resin sheet 17 is replaced with glass. It is a graph which shows the result which confirmed the relationship between the temperature about the surface (opposite surface) on the opposite side to the side where the heating wire 6 exists, and the energization time to the heating wire 6 by experiment. As can be seen from FIG. 20, in each case, although the opposite surface had a slight difference in the magnitude of the energization time, the temperature rose substantially similarly to the energization time.

  Incidentally, the physical properties of polycarbonate resin and glass are compared as follows.

The heat transmissivity is 4.3 kcal / m ² h ° C in the former, while the latter is 5.2 kcal / m ² h ° C, and the thermal conductivity is 0.17 kcal / mh ° C in the former. In contrast, the latter is 0.86 kcal / mh ° C., and the specific heat is 0.27 cal / g ° C. in the former, whereas the latter is 0.2 cal / g ° C., and the density is 1.2 g / in in the former. whereas the cm ^3, and the latter is 2.5 g / cm ^3, further surface state whereas the former has a water repellency, the latter has a hydrophilic.

Second Embodiment
FIG. 12 is an explanatory view showing a manufacturing process of the heating wire pressure-sensitive adhesive sheet 8, and FIG. 13 is a perspective view showing the heating wire pressure-sensitive adhesive sheet 8.

  The heating wire pressure-sensitive adhesive sheet manufacturing tool 2 used in the previous embodiment is prepared, and a single heating wire 6 similar to the previous one is folded into ninety-nine folds on the post members 4a and 4b on the left and right sides as shown in FIG. And is positioned on the jig plate 3 so as to obtain a planned pattern in which a large number of linear portions 6a are arranged in parallel. Next, the heat-resistant adhesive film 1 having a rectangular width that is smaller than the distance between the columns of the left and right post members 4a and 4b is positioned in the range between the columns of the left and right post members 4a and 4b on the upper surface of the jig plate 3. Put them together and hold them with your hands.

  Next, the first pressing plate 5 is moved downward through driving means such as a fluid pressure cylinder device (not shown), and after the first pressing plate 5 presses the heat-resistant adhesive film 1 against the upper surface of the jig plate 3, The post members 4 a and 4 b are displaced downward from the upper surface of the jig plate 3. At this time, the range portions excluding the U-turn portions at the left and right end portions of the heating wire 6 folded in the ninety-nine are pressed and stuck to the adhesive surface of the heat-resistant adhesive film 1 and fixed. Next, the first pressing plate 5 is moved upward, and the heat-resistant adhesive film 1 is taken up from the upper surface of the jig plate 3 in the same shape as the heating wire 6. Finally, as shown in FIG. 13, the release film 7 is attached to the adhesive surface of the heat-resistant adhesive film 1 so that the heating wire 6 is covered. Thereby, the heating wire adhesive sheet 8 is created.

  FIG. 14 is a perspective view showing the polycarbonate resin sheet 9 to which the heating wire adhesive sheet 8 is adhered. The upper and lower end portions of the polycarbonate resin sheet 9 are preliminarily elongated recesses 19a and 19b in the front-rear direction. The bus bars 20a and 20b are attached to the recesses 19a and 19b.

  Next, the state in which the release film 7 is peeled off from the heating wire adhesive sheet 8 shown in FIG. 13 is placed on the upper surface of the polycarbonate resin sheet 9 shown in FIG. The adhesive surface of the heat-resistant adhesive film 1 of the heating wire adhesive sheet 8 is adhered. Then, the left and right end portions of the heated wire 6 are placed on the upper surfaces of the corresponding bus bars 20a and 20b and connected by spot welding or the like to form the first intermediate product 10.

  FIG. 15 is an explanatory view showing a process of pressing the heat-resistant adhesive film 1 and the heating wire 6 on the upper surface of the polycarbonate resin sheet 9 of the first intermediate product 10, FIG. 16 is an explanatory view showing a process of energizing the heating wire 6, and FIG. 2 is a perspective view showing a second intermediate product 14. FIG. As shown in FIG. 15, the second pressing plate 11 is positioned on the upper surface of the heat-resistant adhesive film 1, and a pressing force is applied to the second pressing plate 11 by a press machine including a fluid pressure cylinder device (not shown). The heat-resistant adhesive film 1 is pressed against the upper surface of the polycarbonate resin sheet 9 as described above.

  As shown in FIG. 16, the DC power supply 13 is connected to the bus bars 20a, 20b on the left and right sides of the polycarbonate resin sheet 9 via the conductive wires 12a, 12b. Adjust the voltage to energize. After the energization of the heating wire 6 is completed, the second pressing plate 11 is displaced upward and the heat-resistant adhesive film 1 is peeled off from the first intermediate product 10, whereby the second intermediate product 14 shown in FIG. 17 is formed. The At this time, the upper portion of the heating wire 6 is not completely covered with the flesh of the polycarbonate resin sheet 9 as in the previous case, but is exposed outward as shown in FIG.

  FIG. 18 is a perspective view showing a heat generating resin sheet 17 as a product. After the second intermediate product 14 shown in FIG. 17 is obtained, the hard coat layer 16 is formed in the same manner as described above, and two through holes d1 and d1 are formed in the hard coat layer 16. At this time, the through hole d1 is formed by etching the hard coat layer 16 or by lift-off using a mask. Connection terminals 18a and 18b for connecting a power source are attached to each through hole d1, and connected to the corresponding bus bars 20a and 20b by spot welding or screwing.

  19A is a diagram showing a cross-sectional structure of the b1-b1 portion in FIG. 18, and FIG. 18B is a diagram showing a cross-sectional structure of the b2-b2 portion in FIG. 16a is a primer layer made of an acrylic resin. In addition, the description part in these figures attaches | subjects the corresponding code | symbol, and abbreviate | omits description.

<Third Embodiment>
20 is a perspective view of the heat generating resin sheet 17 according to the present embodiment, and FIG. 21 is a cross-sectional view showing a section cc of FIG.

  As in the case of the second embodiment, the heating resin sheet 17 according to the present embodiment has a heating pattern 6 in a planned pattern on one of the upper and lower surfaces of the polycarbonate resin sheet 9 (the lower surface in FIG. 21). The bus bars 20a and 20b, which are embedded and are connected to the heating wire 6, are attached to the left and right ends of the one surface. Further, unlike the previous first and second embodiments, the heating wire 6 is embedded in the planned pattern on the other surface of the polycarbonate resin sheet 9 as shown in FIG. It is cut one by one at the U-turn part of the end part, and the left and right end parts 6c are led to the opposite surface through the small holes 9a in the thickness direction formed at the left and right end parts of the polycarbonate resin sheet 9, The bus bars 20a and 20b on the corresponding side are connected by spot welding or the like.

  Since the polycarbonate resin sheet 9 has better workability than glass, the small hole 9a through which the heating wire 6 (nichrome wire) passes is easily processed. Moreover, the process which embeds the heating wire 6 in the upper and lower surfaces of the polycarbonate resin sheet 9 has the state which has arrange | positioned the naked sheet which peeled the peeling film 7 from the heating wire adhesive sheet 8 on the upper and lower sides of the polycarbonate resin sheet 9, and In addition, by applying a pressing force to the outside of these bare sheets with a press machine, the heat-resistant adhesive film 1 and the heating wire 6 are simultaneously pressed on the upper and lower surfaces of the polycarbonate resin sheet 9, respectively. The heating wire on each surface is energized according to what has been described. Thereby, the embedding process of the heating wire can be performed by one press process and energization process. Moreover, the hard coat layer 16 can be simultaneously formed on the upper and lower surfaces of the polycarbonate resin sheet 9 by performing a dip type hard coat treatment. Thereby, efficient manufacture of the exothermic resin sheet 17 of the embodiment becomes possible. Other points are the same as in the case of the second embodiment.

The exothermic resin sheet 17 of the embodiment can effectively heat the upper and lower surfaces of the polycarbonate resin sheet 9 with the corresponding heating wires 6, and can quickly and efficiently remove fogging, frost, snow, etc. on the upper and lower surfaces. Can be removed.
In the above description of the embodiment of the present invention, the Ni—Cr alloy (commonly referred to as “Nichrome”) is used as the heating wire 6. However, the present invention is not limited to this, and a Cu—Mn—Ni alloy (manganin) generally used as a resistance material. Cu-Ni alloy, Fe-Cr alloy, etc. can be used similarly.

It is explanatory drawing which shows manufacture of the heating wire adhesive sheet which concerns on 1st Embodiment. It is a perspective view which shows the said heating wire adhesive sheet. It is explanatory drawing which shows the process of sticking the said heating wire adhesive sheet to a thermoplastic resin sheet. It is a perspective view showing the 1st intermediate product of the exothermic resin sheet concerning a 1st embodiment. It is explanatory drawing which shows the process of providing pressing force to the upper and lower surfaces of a said 1st intermediate product via a press plate. It is explanatory drawing which shows the process of supplying with electricity to the heating wire of a said 1st intermediate product. It is a perspective view which shows the 2nd intermediate product of the heat-generating resin sheet which concerns on 1st Embodiment. It is sectional drawing which shows the aa part of FIG. It is a perspective view showing the 3rd intermediate product of the exothermic resin sheet concerning a 1st embodiment. It is a perspective view which shows the product of the heat generating resin sheet which concerns on 1st Embodiment. It is the graph which illustrated the temperature rise characteristic about each in the case of the heat-generating resin sheet of 1st Embodiment, and the case where the polycarbonate resin sheet of this sheet | seat is a glass material. It is explanatory drawing which shows the manufacturing process of the heating wire adhesive sheet which concerns on 2nd Embodiment. It is a perspective view which shows the heating wire adhesive sheet which concerns on 2nd Embodiment. It is a perspective view which shows the polycarbonate resin sheet which concerns on 2nd Embodiment. It is explanatory drawing which shows the process of pressing down the 1st intermediate product which concerns on 2nd Embodiment with a 2nd press plate. It is explanatory drawing which shows the process of supplying with electricity to the heating wire of the 1st intermediate product which concerns on 2nd Embodiment. It is a perspective view which shows the 2nd intermediate product which concerns on 2nd Embodiment. It is a perspective view which shows the product of the heat generating resin sheet which concerns on 2nd Embodiment. The heat generating resin sheet which concerns on 2nd Embodiment is shown, A is a figure which shows the cross-sectional structure of b1-b1 part in FIG. 17, B is a figure which shows the cross-sectional structure of b2-b2 part in FIG. It is a perspective view which shows the product of the heat generating resin sheet which concerns on 3rd Embodiment. It is sectional drawing which shows the cc part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat-resistant adhesive film 3 Jig board 5 Press board 6 Heating wire 7 Release film 8 Heating wire sticking sheet 9 Thermoplastic resin sheet (polycarbonate resin sheet)
14a Post member 14b Post member 16 Hard coat layer 17 Heat generating resin sheet

Claims (4)

The heating wire is densely embedded in at least one surface of the transparent thermoplastic resin sheet, and a part of an arbitrary cross section in the substantially full length range of the heating wire on the one surface is continuously formed on the one surface. An exothermic resin sheet, characterized in that a hard coat layer made of a material that is exposed to the outside and is harder and more thermally conductive than the thermoplastic resin sheet is formed so as to cover at least one of the surfaces.
2. The heat generating resin sheet according to claim 1, wherein the thermoplastic resin sheet is a polycarbonate resin sheet, and the hard coat layer is a silicon hard coat layer.
Under a state where an electric current is passed through the heating wire and the heating wire is set to a temperature in the range of 120 to 250 ° C., the heating wire is pressed against the surface of the polycarbonate resin sheet by a pressing plate, thereby the electric wire on the surface. A method for producing a heat-generating resin sheet, characterized in that a range in which a heat ray is pressed is embedded in a continuous manner so that a part of a cross-section is continuously exposed outward and hardly protrudes from the surface.
  A heating wire adhesive sheet is prepared by arranging and sticking heating wires in a planned pattern on the adhesive surface of the heat-resistant adhesive film, and the heating wire adhesive sheet is attached to the surface of the transparent thermoplastic resin sheet through the adhesive surface. 4. The method of manufacturing a heat generating resin sheet according to claim 3, wherein a current is passed through the heating wire after being attached.

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