JP4964983B2 - Method for manufacturing heat insulating sheet and heat insulating sheet manufactured thereby - Google Patents

Description

  The present invention relates to a heat insulating sheet containing hollow micro objects (microspheres), and more particularly to a heat insulating sheet used as a cover for covering automobiles, small ships, and the like.

  In order to prevent the indoor temperature of an automobile from excessively rising due to the heat of the sun, generally, a corrugated cardboard having an aluminum foil pasted on its surface is used. Such a decorative cardboard can be bent and is disposed inside the front window of the automobile while the vehicle is stopped, thereby reflecting sunlight to achieve a heat insulating effect inside the vehicle.

  The heat insulation means using the decorative cardboard only shields sunlight from the front window, so that it cannot shield sunlight entering from other window glass such as a side window or heat transmitted from the roof of the automobile. There was a problem that the effect was not sufficient. Moreover, although the sunlight is reflected by the aluminum foil affixed on the surface, there also existed a problem that heat was transmitted to the inside by being exposed to sunlight for a long time, and the heat insulation effect became thin.

  In view of such circumstances, the present applicant pays attention to a hollow micro object already known to have a high heat insulating effect, covers a heat insulating sheet in which the hollow micro object is present in an automobile or the like that requires heat insulation, and sunlight. It came to study earnestly about the technology which shields. This hollow microscopic body is also called a microsphere, and is formed by sealing air and various gases in a sphere made of ceramic, resin, glass or the like having a diameter of about 5 μm to 300 μm.

  As a conventional heat insulation sheet containing the hollow micro object, for example, one disclosed in Patent Document 1 can be cited. Such a conventional heat insulating sheet is obtained by mixing a hollow micro object with a paint mainly composed of a latex material, and applying this to the surface of the sheet substantially uniformly. For example, it requires heat insulation on a roof of a building or a vehicle. It can be attached to the part.

Registered Utility Model Publication No. 3046167

  However, in the above conventional heat insulating sheet, a latex agent is used as a medium, and this latex is water-based and at the same time hardens and loses its flexibility. For example, when used as a cover for covering an automobile, There is a problem in that it cannot follow various uneven shapes on the surface of the automobile and cannot serve as a cover.

  Furthermore, since the conventional heat insulating sheet lacks flexibility as described above, it cannot be stored by being wound or folded in a roll shape, and is practically impossible to apply to a cover of an automobile or the like. There is also. That is, a cover of an automobile or the like is used exclusively when the vehicle is stopped and needs to be stored in the vehicle while traveling, but if it cannot be rolled or folded, it is stored in a limited space such as a trunk. Because you can't.

  The present invention has been made in view of such circumstances, and by providing flexibility and elasticity to the sheet containing the hollow micro object, it is possible to obtain a sufficient heat insulating effect and to be stored by being wound or folded. In addition, the present invention provides a method for manufacturing a heat insulating sheet capable of covering an automobile or the like following an uneven shape and a heat insulating sheet manufactured thereby.

  According to the first aspect of the present invention, a plurality of hollow micro objects having different diameters are added to a flexible resin that maintains flexibility and elasticity even after being dried and solidified, and formed into a sheet having a thickness of 0.4 to 3.0 mm. A method for producing a heat insulating sheet, wherein the flexible resin is formed into a sheet shape, and before the flexible resin is dried and solidified, the hollow fine bodies are uniformly dispersed on the surface of the flexible resin, Further comprising a step of applying the flexible resin on the substrate, wherein the hollow fine body and the flexible resin are applied on a base fabric made of woven fabric, nonwoven fabric or paper to form a sheet. To do.

  The invention according to claim 2 is the method for producing a heat insulating sheet according to claim 1, wherein the flexible resin is formed on the base fabric into a sheet shape, and the flexible resin is dried before solidifying. It is characterized in that the hollow microscopic object is uniformly dispersed on the surface of the resin, and the flexible resin is further applied thereon.

  According to a third aspect of the present invention, in the method for manufacturing a heat insulating sheet according to the first aspect, the flexible resin is formed into a sheet shape, and before the flexible resin is dried and solidified, the surface of the flexible resin is formed. The hollow micro objects are uniformly sprayed, and the flexible resin is further applied thereon, and then the base cloth is placed thereon.

  According to a fourth aspect of the present invention, in the method for manufacturing a heat insulating sheet according to the second or third aspect, the base fabric is impregnated with a resin in advance.

  The invention according to claim 5 is the method for manufacturing a heat insulating sheet according to any one of claims 1 to 3, wherein the hollow resin is applied to the flexible resin and the hollow micro object is applied to the flexible resin. It is characterized by using a different material from the conductive resin.

  Invention of Claim 6 is a manufacturing method of the heat insulation sheet | seat as described in any one of Claims 1-5, The said hollow micro body is a thing with a diameter of 5-300 micrometers, These are suitably used. It is characterized by being mixed at a ratio.

  Invention of Claim 7 is the manufacturing method of the heat insulation sheet | seat of any one of Claims 1-6. WHEREIN: The width | variety of a motor vehicle with respect to the sheet-like flexible resin containing the said hollow micro object A cutting process in which substantially the same dimensions are defined as horizontal lengths, and the lengths from the car hood root to the front window, roof, rear window, and trunk lid root are cut into a rectangular shape, and the cutting process is performed. A winding member attaching step for attaching a cylindrical or column-shaped winding member to one end in the longitudinal direction of the sheet-like flexible resin, and a desired portion of the sheet-like flexible resin subjected to the cutting step And an attaching means attaching step for attaching a magnet or a suction cup that can be attached to an automobile.

  The invention according to claim 8 is the method for producing a heat insulating sheet according to claim 7, wherein the sheet-like flexible resin including the hollow minute body is cut into a side member cut to a shape covering a side window of an automobile. And bonding means for bonding the second sheet obtained by the step and the side-side cutting step to the first sheet that has undergone the cutting step, the winding member attaching step, and the adhering means attaching step. And an attachment step for attaching to two sheets.

  Invention of Claim 9 was manufactured by the method of the said Claims 1-8, The heat insulation sheet characterized by the above-mentioned.

  According to the inventions of claims 1 to 4, 6 and 9, the sheet containing the hollow micro objects having different diameters is made flexible and elastic, so that a sufficient heat insulating effect is obtained and the sheet is wound. It is possible to manufacture a heat insulating sheet that can be folded and stored and can follow an uneven shape to cover an automobile or the like. Moreover, since the base fabric which consists of a woven fabric, a nonwoven fabric, or paper is used, a more flexible heat insulation sheet can be obtained, improving tensile strength.

  Furthermore, since it has a three-layer structure in which the flexible resin is positioned on the upper and lower surfaces of the hollow micro object, the hollow micro object can be reliably included in the heat insulating sheet. Furthermore, since the base fabric is included, the tensile strength of the heat insulating sheet can be improved in addition to the improvement of moldability in the production process.

  According to invention of Claim 5, the front and back of a heat insulation sheet can be shape | molded with the material of a respectively different property, and the heat insulation sheet according to a use can be obtained. For example, only the surface side of the heat insulating sheet can be molded with a soft resin having water repellency and weather resistance.

  According to the invention of claim 7, the heat insulating sheet can be manufactured according to the applicable vehicle type, and the take-up member can be provided so that it can be taken up and stored. Can be easy.

  According to invention of Claim 8, the 2nd sheet | seat for attaching to a 1st sheet | seat and interrupting the sunlight from the side window of a motor vehicle can be obtained.

The top view which shows the heat insulation sheet (1st sheet | seat) which concerns on embodiment of this invention. The top view which shows the heat insulation sheet (2nd sheet | seat) which concerns on embodiment of this invention. The perspective view which shows the state wound up so that the heat insulation sheet (1st sheet | seat) concerning embodiment of this invention might be accommodated. The perspective view which shows the state which attached the heat insulation sheet (1st sheet | seat) which concerns on embodiment of this invention to the motor vehicle. The perspective view which shows the state which attached the heat insulation sheet (2nd sheet | seat) which concerns on embodiment of this invention to the motor vehicle. The top view and side view which show the motor vehicle to which the heat insulation sheet which concerns on embodiment of this invention is applied Sectional schematic diagram which shows the state of the hollow micro object in the heat insulation sheet which concerns on embodiment of this invention. Cross-sectional schematic diagram showing the state when the size of the hollow micro object is uniform The graph which shows the temperature change in a vehicle accompanying the elapsed time in a present Example, the comparative example 1, and the comparative example 2.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The heat insulation sheet of this embodiment covers the outer side of a motor vehicle, suppresses the temperature rise in a vehicle by sunlight, and has a hollow micro object inside a sheet-like flexible resin. Such a hollow micro body is a micro body in which air is contained in a spherical body made of ceramic, but may be made of glass, resin, or the like, or may contain various gases.

  In addition, since the hollow micro object used in the present embodiment is a mixture of hollow micro objects having a diameter of about 5 to 300 μm at an appropriate ratio, as shown in the schematic diagram shown in FIG. Therefore, the heat insulation effect is remarkably improved. The improvement of the heat insulation effect by increasing the density of the hollow micro object will be described below.

  In other words, it has been found that the sunlight shielding effect by the hollow micro object is mainly achieved by the reflection of solar electromagnetic waves by the internal air (or gas). However, when only hollow micro objects having substantially the same diameter are present, the gap between the hollow micro objects becomes large as shown in FIG. 8, and the volume occupied by the hollow micro objects in the flexible resin sheet is large. Is smaller than the state shown in FIG. Therefore, the volume of air in the whole hollow micro body is reduced, the reflection efficiency of solar electromagnetic waves is deteriorated, and the heat insulation effect is poor. 7 and 8, reference numeral 7 indicates a hollow micro object, and reference numeral 8 indicates a flexible resin.

  On the other hand, if a hollow micro object having a remarkably large diameter is used, the hollow micro object may be ruptured when an excessive load is applied to the surface during winding of the heat insulating sheet, etc. Since there is a possibility that the property itself may be impaired, it is most preferable that the hollow hollow body is in the range of approximately 5 to 300 μm in diameter.

  The flexible resin as a medium in the heat insulating sheet maintains flexibility and elasticity even after being dried and solidified, and a synthetic resin using polycarbonate diol (PCD) as a raw material is used. Alternatively, other flexible resins such as natural rubber or synthetic rubber may be used. That is, the heat insulating sheet in the present invention is required to have high flexibility and elasticity from the necessity of covering automobiles having various uneven shapes and winding and storing them, but after being formed into a sheet shape If a resin that maintains sufficient flexibility and elasticity even when solidified in the medium is used as a medium, such a requirement can be satisfied and it can be appropriately used as a cover.

  On the other hand, for example, latex and urethane resin used in paints are inflexible after solidification, and therefore cannot be wound or folded, which is inconvenient to store and has various uneven shapes for automobiles. It is not suitable for use as a cover. In addition, after being stored by winding or folding, it can be used after being restored into a sheet shape, so that elasticity is required in addition to flexibility, but the above-mentioned latex or urethane resin can also have such properties. Absent.

  Moreover, the heat insulation sheet in this embodiment is equipped with the woven fabric as a base fabric in the inside, and is improving the moldability and tensile strength in a manufacture process. This woven fabric is made of natural fibers or synthetic fibers, and may be replaced with a nonwoven fabric or paper including synthetic paper.

  Furthermore, the thickness of the heat insulating sheet according to the present embodiment is set to approximately 0.4 mm to 3.0 mm so as to be in an optimum state as an automobile cover. When the thickness is 0.4 mm or less, practical tensile strength or the like cannot be obtained, and when it is 3.0 mm or more, winding or folding becomes difficult during storage. This is because, if the thickness is within the range, storage can be facilitated while maintaining a practical strength.

  The heat insulating sheet is composed of a first sheet having a rectangular shape in a state of being flattened, and a second sheet having a shape covering a side window of an automobile, and the dimensions in the first sheet are as shown in FIG. The width W (see FIG. 6) of the applied vehicle is the same as the horizontal length, and the dimension L (see FIG. 6) from the bonnet root of the vehicle to the front window, roof, rear window, and trunk lid root. The length is assumed to be vertical.

  A pipe 2 as a winding member is attached to one end of the first sheet 1. The pipe 2 is a cylindrical member made of vinyl or light metal having a diameter of 10 to 50 mm, and has a length X slightly larger than the width W of the first sheet 1. In place of the pipe 2, a cylindrical member made of another material may be used. However, it is preferable to use a member having strength and weight required for practical use.

  As shown in the figure, a magnet 3 that can be bonded to an automobile is attached to a predetermined portion of the first sheet 1. Since the magnet 3 can be adhered to the vehicle body (metal part) of the automobile when the automobile is covered with the first sheet 1, the first sheet 1 can be fixed so as not to fly by wind or the like. Instead of the magnet 3, a suction cup may be attached to the first sheet 1.

  Furthermore, a magic tape (registered trademark) female 4 as an adhering means is attached to a predetermined portion of the first sheet 1 as shown in FIG. The female 4 of the magic tape can be bonded to the male 5 of the magic tape attached to the second sheet 5 shown in FIG. 2, and when the first sheet 1 covers the automobile, the second sheet 5 is attached to the first sheet 1. It is made to hang from both sides. In addition, it may replace with a magic tape and may use the other general-purpose adhesion | attachment means (The thing which can adhere | attach or remove).

  Similar to the first sheet 1, the second sheet 5 includes a hollow microscopic body in a flexible resin, and the side window of the automobile is covered with the suspended second sheet 5 so that the sun from the side surface can be obtained. Light can be blocked and heat insulation in the side windows can be performed.

  A magnet 3 similar to that of the first sheet 1 is also attached to the lower end of the second sheet 5, and the second sheet 5 is attached by adhering the magnet 3 to the vehicle body (door portion or the like) of the automobile. It can be prevented from flying or being blown by wind or the like. A suction cup may be used in place of the magnet 3, and the male 6 of the magic tape may be disposed on the entire upper edge of the second sheet 5.

Next, the manufacturing method of the said heat insulation sheet is demonstrated.
First, a flexible resin that maintains flexibility and elasticity even after drying and solidification is applied onto a base fabric made of a woven fabric with a brush, a spatula, a roller, a spray, or the like to form a sheet. An arbitrary additive for improving moldability may be added to the flexible resin. In addition, by interposing the base fabric, it is possible to improve the moldability of the flexible resin when it is molded into a sheet shape, but only the flexible resin is molded into a sheet shape without using the base fabric. It may be.

  And before the flexible resin shape | molded in the sheet form dries and solidifies, a hollow micro object is uniformly sprayed with respect to the surface of the said flexible resin. Here, as described above, the hollow micro object having a diameter of approximately 5 to 300 μm is mixed at an appropriate ratio, and is dispersed by, for example, a sandblasting method or a method similar to making sandpaper. The amount of the hollow fine particles to be dispersed is preferably 1: 1 by weight ratio and 1: 5 by volume ratio with respect to the flexible resin related to the heat insulating sheet, from the viewpoint of heat insulation and elasticity maintenance, but these ratios may be arbitrary. . In addition, since the heat insulation effect will become small if there is little content of a hollow micro object, in order to acquire a desired heat insulation effect, more than predetermined content is needed.

  Thereafter, the same resin as the sheet-like flexible resin is applied onto the hollow micro object with a brush, a spatula, a roller, or a spray to obtain a sheet having a three-layer structure centered on the base fabric and the hollow micro object. Thereby, a hollow micro object can be reliably included in a flexible resin, and it can prevent that a hollow micro object exposes and falls off from the heat insulation sheet surface.

  The flexible resin coating step may be completed as described above, and the flexible resin may be further coated thereon an arbitrary number of times, but the total thickness of the heat insulating sheet is approximately 0.4 to 3.0 mm. It is necessary to become. Further, the flexible resin applied to the third layer can be different from the flexible resin applied to the first layer, and in this case, the following effects can be obtained. That is, the properties can be different between the surface and the back surface of the heat insulating sheet, for example, if the surface is a flexible resin having high water repellency or weather resistance, and the back surface is a flexible resin having good adhesion to an automobile, It is possible to provide a high-quality heat insulating sheet according to the application.

  In addition to the manufacturing method described above, the flexible resin is formed into a sheet shape, and before the flexible resin is dried and solidified, the hollow fine bodies are uniformly sprayed on the surface of the flexible resin. After applying the flexible resin, the base fabric may be placed. Also by such a manufacturing method, what has the same operation effect as the heat insulation sheet mentioned above can be obtained. In addition, what impregnated resin beforehand with respect to the base fabric may be used, and in this case, a heat insulating sheet in which the base fabric is encapsulated with the resin can be reliably obtained.

  In order to use the heat insulating sheet formed as described above as the first sheet 1 (see FIG. 1) having a size and shape corresponding to the applied vehicle type, a cutting step, a winding member attaching step, and an adhering means attaching step are performed. The cutting step is a step of obtaining the rectangular first sheet 1 by cutting the sheet-like flexible resin containing the hollow microscopic body with dimensions of width W and length L. If the width of the conductive resin is formed with W, it may be cut only by the length of the dimension L.

  The winding member attaching step is a step of attaching the pipe 2 to one of the longitudinal ends of the first sheet 1. For example, the pipe 2 may be attached to the first sheet 1 with a general-purpose adhesive. A hole for attaching the pipe 2 to the end of the sheet 1 may be formed in advance, and the pipe 2 may be inserted and attached to the hole.

  The attachment means attaching step is a step of attaching the magnet 3 (or a suction cup instead) to a desired portion of the first sheet 1 with a general-purpose adhesive or the like, and may be performed before or after the winding member attaching step. Good. Through the manufacturing process, the first seat 1 for covering the front window, roof, and rear window of the automobile can be manufactured.

  On the other hand, the second sheet 5 is subjected to an attachment process after undergoing a side-side member cutting process of cutting the sheet-like flexible resin containing the hollow minute body into a shape (see FIG. 2) covering the side window of the automobile. It is manufactured by. The attaching step is a step of attaching the magic tape male 6 to a desired portion of the second sheet and attaching the magic tape female 4 to the corresponding position of the first sheet.

  In order to cover the automobile with the heat insulating sheet, first, as shown in FIG. 4, the first sheet 1 is bonded with the magnet 3 over the front window, the roof, and the rear window, and then the first sheet 1 is used. The magic tape male 6 in the second sheet 5 is bonded to the magic tape female 4 in FIG. 5, and the lower end thereof is fixed by the magnet 3 to obtain a state as shown in FIG. At this time, since the 1st sheet | seat 1 and the 2nd sheet | seat 5 are materials with sufficient flexibility, they can fully follow the uneven | corrugated shape in each part of a motor vehicle, and can cover a motor vehicle.

  On the other hand, in order to store the heat insulating sheet covering the automobile, the first sheet 1 and the second sheet 5 are separated, the second sheet 5 is folded, and as shown in FIG. 1 is wound and each is accommodated in a trunk of an automobile, for example. At this time, since the 1st sheet | seat 1 and the 2nd sheet | seat 5 are the materials rich in the softness | flexibility and elasticity, they can be folded or rolled up easily.

  According to this embodiment, while protecting a motor vehicle from a wind and rain, the excessive temperature rise in the vehicle of summer can be suppressed by the heat insulation effect. Furthermore, if it is used in winter, the temperature inside the vehicle can be prevented from excessively decreasing, and the heating efficiency inside the vehicle can be improved.

  As mentioned above, although this embodiment was described, the present invention is not limited to this, for example, in addition to the above manufacturing method, the surface may be embossed to improve the strength of the heat insulating sheet, You may make it print a design etc. on the surface for the decoration effect. Furthermore, the heat insulating sheet of the present invention may be applied to a cover of a small ship or the like in addition to being applied to an automobile.

Hereinafter, the present invention will be described more specifically with reference to examples. The examples are provided to illustrate the present invention and are not intended to limit the present invention.
In this example, a heat insulating sheet including a hollow fine body having a thickness of 5 to 300 μm and a synthetic resin made of polycarbonate diol (PCD) as a raw material with a woven cloth as a base cloth and having a thickness of 0.6 mm was used. Then, the front window, roof, rear window, and side window of the automobile that was placed in a place exposed to sunlight outdoors were covered with the heat insulating sheet, and the temperature inside the vehicle that changed over time was measured.

  On the other hand, as Comparative Example 1, the car was left in the same place as the example without being covered with the heat insulating sheet, and as Comparative Example 2, the car was left in the shade without being covered with the heat insulating sheet. The temperature inside the vehicle, which changes with time, was measured and compared with the examples. The measurement results are shown in FIG. 9 with time on the horizontal axis and temperature on the vertical axis.

  As is clear from the comparison of FIG. 9, if the vehicle is covered with the heat insulating sheet according to the present embodiment, the heat insulating effect can be remarkably exhibited as compared with the indoor temperature of the vehicle in a place exposed to sunlight. The temperature change can be approximately the same as the in-vehicle temperature of the automobile placed in the vehicle.

  The step of forming the flexible resin into a sheet shape, spraying the hollow microscopic object uniformly on the surface of the flexible resin before the flexible resin is dried and solidified, and further applying the flexible resin thereon Having a hollow micro object and a flexible resin on a base fabric made of woven fabric, non-woven fabric or paper and forming it into a sheet shape, and a heat insulating sheet manufactured thereby, Other forms may also be used.

1 ... 1st sheet (heat insulation sheet)
2 ... Pipe (winding member)
DESCRIPTION OF SYMBOLS 3 ... Magnet 4 ... Female of magic tape 5 ... Second sheet 6 ... Male of magic tape 7 ... Hollow micro object 8 ... Flexible resin

Claims (9)

A method for producing a heat-insulating sheet in which a plurality of hollow micro objects having different diameters are added to a flexible resin that maintains flexibility and elasticity even after drying and solidifying, and is molded into a sheet having a thickness of 0.4 to 3.0 mm. ,
The flexible resin is formed into a sheet shape, and before the flexible resin is dried and solidified, the hollow microscopic object is uniformly dispersed on the surface of the flexible resin, and the flexible resin is further applied thereon. A method for producing a heat insulating sheet, comprising: forming a sheet by applying the hollow fine body and the flexible resin onto a base fabric made of a woven fabric, a nonwoven fabric, or paper.   The flexible resin is molded into a sheet on the base fabric, and before the flexible resin is dried and solidified, the hollow microscopic object is uniformly dispersed on the surface of the flexible resin, and the The method for producing a heat insulating sheet according to claim 1, wherein a flexible resin is applied.   The flexible resin is formed into a sheet shape, and before the flexible resin is dried and solidified, the hollow microscopic object is uniformly dispersed on the surface of the flexible resin, and the flexible resin is further applied thereon. The method for manufacturing a heat insulating sheet according to claim 1, wherein the base fabric is placed after the step.   The method for producing a heat insulating sheet according to claim 2 or 3, wherein the base fabric is impregnated with a resin in advance.   The heat insulating sheet according to any one of claims 1 to 3, wherein the flexible resin on which the hollow micro objects are dispersed and the flexible resin applied on the hollow micro objects are made of different materials. Manufacturing method.   The hollow micro object has a diameter of 5 to 300 µm and is a mixture of these in an appropriate ratio. The heat insulating sheet according to any one of claims 1 to 5, Production method. For the sheet-like flexible resin containing the hollow micro body,
A cutting step in which a width approximately the same as the width of the vehicle is a horizontal length, and a length from the bonnet root of the vehicle to the front window, roof, rear window, and trunk lid is cut into a rectangular shape having a vertical length;
A winding member attaching step of attaching a cylindrical or columnar winding member to one of the longitudinal ends of the sheet-like flexible resin subjected to the cutting step;
Adhesive means attaching step for attaching a magnet or sucker that can be adhered to an automobile to a desired location of the sheet-like flexible resin subjected to the cutting step;
The manufacturing method of the heat insulation sheet as described in any one of Claims 1-6 characterized by the above-mentioned. For the sheet-like flexible resin containing the hollow micro body,
A side-side member cutting step for cutting into a shape covering the side window of the automobile;
Adhesive means for adhering the second sheet obtained by the side-side cutting step to the first sheet that has undergone the cutting step, the winding member attaching step, and the adhering means attaching step are attached to the first sheet and the second sheet. Installation process to attach,
The manufacturing method of the heat insulation sheet | seat of Claim 7 characterized by the above-mentioned.   A heat insulating sheet manufactured by the method according to claim 1.

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