JP2009149000A - Heat insulating material and heat insulation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of enhancing energy efficiency regardless of a means of lowering thermal conduction, in a freezer, refrigerator, cooler box, etc., that are used outdoors. <P>SOLUTION: A heat insulating material 1 in which a resin film 2, aluminum foil 3, reinforcing material 4 and adhesive layer 5 are laminated in this order, and a heat insulation method using the same, are disclosed. By the heat insulating material and the heat insulating method using the same, flowing of heat into a freezer, refrigerator, cooler box, etc. that are particularly used outdoors can be effectively prevented and energy saving is achieved. Also, the heat insulating material is thinner compared with the conventional heat insulating material, and a cooler box or the like can be made compact. Further, since the material is easily applicable to an existing freezer and the like, further energy saving is attained. For example, the energy saving in a cooler box used in vending machines and transport vehicles can be attained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat shielding material and a heat shielding method using the same. More specifically, the present invention relates to a heat shielding material and a heat shielding method suitable for an automatic beverage vending machine installed outdoors and a transportation vehicle such as a cold car.

Freezers, refrigerators, refrigerators, etc. have a large demand for energy saving. Among them, vending machines and refrigerators used outdoors are exposed to direct sunlight, so energy consumption for cooling is large, and it is necessary to devise measures to cut off heat from sunlight and outside air as much as possible to increase energy efficiency. .
In order to block heat, various heat insulating materials have been conventionally developed (for example, Patent Documents 1 to 3). Although these heat insulating materials have a considerable effect, a further heat insulating effect is required. However, most of the heat insulating materials are foam and thick, and the volume of a cold storage or the like becomes large.
JP 2007-278373 A JP 2006-90497 A JP 2004-322953 A

  An object of the present invention is to provide a method for improving energy efficiency without depending on means for reducing heat conduction, particularly in a freezer, refrigerator, cold storage, etc. used outdoors. Another object of the present invention is to provide a heat shield for use in such a method.

The present inventors have previously developed a roof waterproofing repair sheet having a specific structure including a fluororesin and an aluminum foil (Japanese Patent Laid-Open No. 11-310999). As a result of further research, this sheet is extremely suitable for heat insulation. The present invention was reached.
That is, the present invention is as follows.
1. A heat shielding material in which a resin film, an aluminum foil, and an adhesive layer are laminated in this order.
2. A heat shielding material in which a resin film, an aluminum foil, a reinforcing material and an adhesive layer are laminated in this order.
3. The heat shielding material according to 1 or 2, wherein the resin film is a fluororesin film.
4). The heat shielding material of the above 1, 2 or 3 which is used for heat insulation of a frozen, refrigerated or cold storage cabinet.
5. 4. The heat insulating material according to 4 above, wherein the frozen, refrigerated or cold storage container is an automatic beverage vending machine.
6). The said 4 heat-insulating material whose refrigeration, refrigeration, or cold storage is for vehicles.
7). A heat shielding method for a refrigeration, refrigeration, or cold storage cabinet, wherein the outside is covered with the heat shielding material according to any one of 1 to 6 above.
8). A heat insulating layer is provided on the top plate and / or side surface outside of the frozen, refrigerated or cold storage cabinet, and all or part of the outside of the heat insulating layer is covered with the heat shield material according to any one of 1 to 6 above. Heat insulation method for refrigeration, refrigeration or cold storage.

  According to the heat shielding material and the heat shielding method of the present invention, inflow of heat to a freezer, refrigerator, cold storage, etc. used outdoors can be effectively prevented, which contributes to energy saving. In addition, the heat shield of the present invention is thinner than conventional heat insulating materials, and it is possible to reduce the size of a cool box or the like. Furthermore, since the heat shield of the invention can be easily applied to an existing freezer or the like, further energy saving can be measured.

The present invention is described in detail below.
FIG. 1 is a diagram showing the configuration of the heat shield material of the present invention. In FIG. 1, reference numeral 1 denotes a heat shielding material of the present invention, which is usually in the form of a sheet. 2 is a resin film, 3 is an aluminum foil, 4 is a reinforcing material used as necessary, 5 is an adhesive layer, and 6 is a release material.

  Examples of the resin film 2 include a polyethylene terephthalate film, a polyethylene naphthalate film, a fluororesin film, a coextruded film of a fluororesin and an acrylic resin, and a fluororesin film is preferable. Examples of fluororesins include polytetrafluoroethylene, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / ethylene copolymer, polychlorotrifluoroethylene, chlorotriethylene. Fluoroethylene / ethylene copolymer, polyvinylidene fluoride, polyvinyl fluoride and the like can be exemplified, and polyvinyl fluoride is preferable. Although there is no restriction | limiting in particular in the thickness of a fluororesin film, Usually, it is 10-50 micrometers.

The aluminum foil 3 may be either hard or soft. The thickness is not particularly limited, but is usually 7 to 100 μm.
As the reinforcing material 4, for example, a polyethylene film, a resin film such as a polypropylene film, a polyester film, a woven fabric, a non-woven fabric, or the like is used. Although there is no restriction | limiting in particular in the thickness, Usually, 7-100 micrometers.
As the pressure-sensitive adhesive of 5, a metal such as iron or aluminum, or a coating surface thereof may be used, and for example, butyl rubber may be blended with a softener, a tackifier, a filler or the like as necessary. Vulcanized butyl rubber adhesive can be used. An acrylic adhesive and asphalt can also be used. Although there is no restriction | limiting in particular in the thickness of an adhesive layer, Usually, it is 0.1-1.2 mm.
The release material 6 is usually paper, and is peeled off from the adhesive layer immediately before use.

  The above heat shielding material can be produced according to a known method. For example, by dry laminating resin film, aluminum foil and reinforcing material as necessary to make a three-layer laminate, separately applying a pressure-sensitive adhesive to the release material with a calender roll, etc., and pasting it with the three-layer laminate Can be manufactured.

The heat shielding material of the present invention is particularly suitable for use in a freezer, refrigerator, cold storage, etc. used outdoors. For example, in vending machines and storages for transportation vehicles, energy saving can be achieved very easily by sticking the heat shield of the present invention to a top plate, a side plate or the like.
In order to further save energy, it is preferable to provide a heat insulating layer on the outer side of the top plate and / or the side plate, and to cover all or part of the outer side of the heat insulating layer with the heat shielding material of the present invention. The heat insulating layer may be a simple gap or a vacant space, or may be a heat insulating material such as a foam material or a space or a vacant room filled with a heat insulating material.

Hereinafter, the present invention will be described with reference to examples.
Example 1
The heat shield sheet of the present invention, in which fluororesin film, aluminum foil, polyethylene nonwoven fabric, butyl adhesive and release paper are laminated in this order, is applied from the outside to the top of the storage space of the van type truck and is actually running The outside air temperature, the heat shield surface temperature and the internal temperature were measured. As a comparison, the internal temperature was also measured for a track that was not attached. Measurements were taken from the beginning of July to the beginning of September.
The temperature measurement results are shown in Table 1 and FIG. From Table 1 and FIG. 2, it was found that when the heat shielding material sheet was applied, both the surface temperature and the internal temperature were lower than that of a normal van type truck.

Example 2
Two vending machines were prepared. On the entire top plate, a heat insulating layer made of a plastic casing having a low-profile, right-angled triangle with a hollow inside and having an outer surface covered with a heat shielding material sheet similar to that of Example 1 was attached. On August 15, 2007, the temperature of the top plate and the outside air temperature of two vending machines were measured over time. The results are shown in FIG.
The temperature of the top plate was much lower when the insulation layer was attached.

  In particular, in a freezer, refrigerator, cold storage, etc. used outdoors, it is useful as a heat shield for increasing energy efficiency without depending on means for reducing heat conduction.

It is a figure showing the structure of the heat shield of this invention. It is a figure showing the result of the internal temperature measurement of a track. It is a figure showing the result of the temperature measurement of the top plate of a vending machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat shield material 2 Resin film 3 Aluminum foil 4 Reinforcement material 5 Adhesive layer 6 Release material

Claims (8)

A heat shielding material in which a resin film, an aluminum foil, and an adhesive layer are laminated in this order. A heat shielding material in which a resin film, an aluminum foil, a reinforcing material and an adhesive layer are laminated in this order. The heat shielding material according to claim 1 or 2, wherein the resin film is a fluororesin film. The heat insulating material according to claim 1, 2 or 3, wherein the heat insulating material is used for heat insulation of a frozen, refrigerated or cold storage container. The heat insulating material according to claim 4, wherein the frozen, refrigerated or cold storage is an automatic beverage vending machine. The heat insulating material according to claim 4, wherein the refrigeration, refrigeration or cold storage is for a vehicle. A heat shielding method for a refrigeration, refrigeration, or cold storage container, wherein the outside is covered with the heat shielding material according to any one of claims 1 to 6. A heat insulating layer is provided on the top plate and / or side surface outside of the frozen, refrigerated or cold storage cabinet, and all or part of the outside of the heat insulating layer is covered with the heat shield material according to any one of claims 1 to 6. A heat-insulating method for freezing, refrigeration or cold storage.

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