JP2017140777A - Heat-shielding film and heat-shielding glass structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-shielding film having stable adhesiveness and good peeling property with respect to a glass body such as a window pane, and a heat-shielding glass structure including the heat-shielding film.SOLUTION: A heat-shielding film 1 includes a light-transmitting film 2, an adhesive layer 3 containing a heat-shielding material 3a, and a release layer 4 formed between the light-transmitting film 2 and the adhesive layer 3, in which the adhesive layer 4 is preferably soluble in water or soluble in alcohol. The heat-shielding glass structure includes the heat-shielding film 1, in which the adhesive layer 3 side of the heat-shielding film 1 is adhered to one surface of a glass body. The heat-shielding film 1 can be peeled on an interface between the adhesive layer and the release layer 4 with respect to the glass body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a thermal barrier film and a thermal barrier glass structure.

  2. Description of the Related Art Conventionally, an attempt has been made to block incident sunlight by sticking a heat-shielding film to a window glass or vehicle glass, thereby suppressing a temperature increase in a room or a vehicle.

  For example, in Patent Document 1, a resin base film, an adhesive layer formed on the back side of the base film, a heat shielding layer formed on the front side and / or the back side of the base film, A thermal barrier film having a UV hard coat layer formed on the surface side of the thermal barrier layer is described. Further, it is described that the adhesive layer of the heat shielding film is formed as a layer having removability, and the heat shielding layer contains an inorganic near-infrared absorber. Furthermore, Patent Document 1 describes that, for example, a heat shielding film can be attached to a window glass or the like in summer, and the heat shielding film can be peeled off from the window glass or the like in winter.

JP 2013-230613 A

  When a conventional heat-shielding film is attached to a window glass or vehicle glass, for example, it contributes to the suppression of a rise in room temperature in summer, but the room temperature is lowered due to sunlight being blocked in winter. As a result, there is a problem that it is difficult to control heating costs because the amount of heaters used increases in winter.

  Moreover, although the adhesive layer has a removability in the heat-shielding film of Patent Document 1, it is difficult to achieve both stable adhesion to window glass and good releasability. For example, if the adhesion to a window glass or the like is increased, the peelability tends to be insufficient, so that the adherence such as an adhesive substance remains on the window glass or the like due to the peeling of the heat shielding film, making it difficult to wipe off. Concerned.

  The present invention has been made in view of the circumstances as described above, and has a heat-shielding film having stable adhesion to glass bodies such as window glass and good peelability, and a heat-shielding film provided with this heat-shielding film. It is an object to provide a glass structure.

In order to solve the above problems, the thermal barrier film of the present invention is
A light transmissive film;
An adhesive layer containing a heat shielding material;
A release layer formed between the light transmissive film and the adhesive layer;
It is characterized by having.

  The thermal barrier glass structure of the present invention is a thermal barrier glass structure provided with the thermal barrier film, wherein the adhesive layer side of the thermal barrier film is bonded to one surface of the glass body, and the thermal barrier film Is characterized in that it can be peeled from the release layer with respect to the glass body.

  The thermal barrier film of the present invention has stable adhesion to glass bodies such as window glass and good peelability. When removing the thermal barrier film, the thermal barrier glass structure of the present invention can be peeled off from the release layer of the thermal barrier film adhered to the glass body. Can be maintained.

It is the cross-sectional schematic diagram which illustrated one Embodiment of the thermal insulation film of this invention. (A) is a schematic sectional drawing which shows the state which affixed the thermal insulation film on the glass body. (B) is a schematic sectional drawing which shows the state which peeled the peeling layer and light transmissive film of the heat shielding film from the glass body. It is a schematic sectional drawing which illustrated another embodiment of the heat insulation film of this invention.

  FIG. 1 is a schematic cross-sectional view illustrating an embodiment of the heat shield film of the present invention.

As illustrated in FIG. 1, the heat shield film 1 includes a light transmissive film 2, an adhesive layer 3 including a heat shield material 3 a, and a release layer formed between the light transmissive film 2 and the adhesive layer 3. 4 is provided. Although not shown, the outer surface of the light transmissive film 2 may be provided with a hard coat layer such as a silicon resin, an antifouling layer such as a fluorine resin, or the like. The outer surface of the pressure-sensitive adhesive layer 3 may be provided with a protective film that easily peels off and protects the pressure-sensitive adhesive layer 3 before being bonded to the glass body 5.
(Light transmissive film)
The light-transmitting film 2 functions as a base material for the heat-shielding film 1 and protects it from friction caused by cleaning in daily life.

  The light transmissive film 2 can be composed of various resins. Specific examples include polyester resins, acetate resins, polyether resins, polycarbonate resins, polyacrylic resins, polymethacrylic resins, polystyrene resins, polyolefin resins, and the like. Other examples include polyimide resins, polyamide resins, polyvinyl chloride resins, polyacetal resins, polyvinylidene chloride resins, polyphenylene sulfide resins, and the like. Further, for example, polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are preferably used because they are excellent in strength, workability, and heat resistance.

  The light transmissive film 2 may be colorless or colored, transparent, translucent, etc., but the refractive index is close to that of the glass body to be deposited (for example, window glass or vehicle glass). It is preferable to adjust so that it may become. Thereby, the transparency of sunlight can be ensured.

Furthermore, although the thickness of the light transmissive film 2 is not specifically limited, For example, the range of 25 micrometers-300 micrometers can be illustrated. When the thickness of the light transmissive film 2 is within this range, it is possible to obtain preferable strength and flexibility in order to adhere to the glass body 5.
(Adhesive layer)
The adhesive layer 3 has adhesiveness and has a function of adhering the heat shielding film 1 to a glass body to be attached.

  The pressure-sensitive adhesive layer 3 is formed of an adhesive (resin) containing a heat shielding material 3a. In this embodiment, the heat shielding material 3 a is uniformly dispersed in the adhesive (resin) constituting the adhesive layer 3.

  For example, an acrylic, silicon, urethane, or rubber adhesive can be used as the adhesive constituting the adhesive layer 3, but it may be formed of a water-soluble or alcohol-soluble material. preferable.

  The material for forming the water-soluble pressure-sensitive adhesive layer 3 is not particularly limited, and examples thereof include those synthesized from a water-soluble compound and a pressure-sensitive polymer component.

  The water-soluble compound is preferably one that imparts fluidity to the adhesive polymer component and provides a plasticizing effect. Specifically, the water-soluble compound can be exemplified by one or more of polyether polyol, alkanolamine, polyvinyl ether and the like.

In addition, examples of the polymer having a carboxyl group in the adhesive polymer component include the following (A) homopolymer or copolymer of monomer and (B) monomer.
(A) Homopolymers such as poly (meth) acrylic acid, carboxyethyl (meth) acrylate, maleic acid, itaconic acid, and monomers thereof.
(B) Alkyl acrylate monomers such as n-butyl (meth) acrylate and 2-ethylhexyl (meth) acrylate.

  These ratios can be adjusted to achieve both tackiness and water removability. Moreover, in order to maintain the light transmittance of the thermal insulation film 1, it can adjust so that the refractive index of the adhesion layer 3 may become a numerical value close | similar to the glass body which is a deposition object.

  The material for forming the adhesive layer 3 having alcohol solubility is not particularly limited, but examples thereof include the same water-soluble compounds as those used in the above surgery.

As the heat shielding material 3a, an inorganic near-infrared absorber can be used. Examples of the inorganic near-infrared absorber include one or two or more near-infrared absorbing materials among antimony-doped tin oxide (ATO), antimony-doped zinc oxide, gallium-doped zinc oxide, tin-doped indium oxide, and the like. Can be exemplified. The fine particles of the near-infrared absorber can preferably be exemplified by those having a particle diameter of 100 nm or less.
(Peeling layer)
The peeling layer 4 is a layer for separating between the adhesive layer 3 and the peeling layer 4 on the surface of the glass body 5 when the thermal barrier film 1 is peeled from the glass body to be attached.

  The release layer 4 is formed of a resin such as a polyolefin resin, a polyester resin, a silicon resin, or a fluororesin. Further, the release layer 4 can contain a known impact resistance imparting agent and inorganic fillers such as titanium oxide, calcium carbonate, and talc.

  The release layer 4 is bonded to the adhesive layer 3 with a relatively weak adhesive strength. That is, the adhesive strength of the release layer 4 to the adhesive layer 3 is adjusted to be weaker than the adhesive strength when the adhesive layer 3 and the light-transmitting film 2 are directly adhered, and the adhesive strength of the adhesive layer 3 to the glass body. ing.

  FIG. 2 (A) is a schematic cross-sectional view showing a state in which a thermal barrier film is attached to a glass body. FIG. 2B is a schematic cross-sectional view showing a state in which the release layer of the heat shield film and the light transmissive film are peeled from the glass body.

  As illustrated in FIG. 2A, the heat shield film 1 has a release layer 4 formed between the light-transmitting film 2 and the pressure-sensitive adhesive layer 3 containing the heat-shielding material 3a, and the pressure-sensitive adhesive layer 3 side. Can be adhered to the glass body 5 by bringing the glass body 5 into contact with the glass body 5.

  Since the heat-shielding film 1 includes the heat-shielding material 3a in the adhesive layer 3, the heat-shielding film 1 is disposed on the glass body 5 so that, for example, heat from sunlight is cut off in summer when the temperature is high. Thus, the temperature rise in the room or the vehicle can be suppressed, and the cooling cost can be suppressed low.

  On the other hand, for example, the heat shielding film 1 can be peeled from the glass body 5 in winter when the temperature is low.

  As illustrated in FIG. 2B, the heat shielding film 1 has a release layer 4 between the light-transmitting film 2 and the adhesive layer 3, and thus between the release layer 4 and the adhesive layer 3. The release layer 4 and the light transmissive film 2 can be peeled off. When the thermal barrier film 1 (the release layer 4 and the light transmissive film 2) is peeled from the release layer 4, the adhesive layer 3 remains on the glass body 5, but the adhesive layer 3 is made of water (warm water) or alcohol. It can be easily washed away. Therefore, even in winter, by taking in sunlight, a decrease in room temperature can be suppressed, and heating costs can be suppressed low. Moreover, since the pressure-sensitive adhesive layer 3 after the peeling is removed cleanly from the glass body 5, there is no possibility of harming the appearance of the glass body 5.

  Thus, since the peeling layer 4 is formed between the light-transmitting film 2 and the adhesion layer 3, the heat-shielding film 1 has stable adhesiveness to the glass body 5 and good peeling properties. Yes.

  Moreover, the heat-shielding glass structure provided with this heat-shielding film 1 has the adhesive layer 3 side of the heat-shielding film 1 bonded to one surface of a glass body 5 (window glass, vehicle glass, etc.). 1 can be peeled from the peeling layer 4 with respect to the glass body 5.

  FIG. 3 is a schematic cross-sectional view illustrating another embodiment of the thermal barrier film of the present invention. The description common to the embodiment illustrated in FIGS. 1 and 2 is omitted.

  In the heat shield film 1 of this embodiment, the heat shield layer 31 including the heat shield material 3 a is formed inside the adhesive layer 3. Examples of the heat shielding layer 31 include metal films such as a Cu thin film, an Ag thin film, and an Au thin film. Among them, an Ag thin film that has high infrared reflectivity and transparency and low thermal conductivity is particularly preferable. preferable.

  Furthermore, in order to obtain a high visible light transmittance, a resin layer containing a high refractive index metal (heat shielding material 3a) can be further laminated on these metal films. Specifically, for example, a resin layer in which fine particles such as zinc aluminum oxide, zinc oxide, titanium oxide, tin oxide, silicon oxide, indium oxide (ITO), antimony-doped tin oxide (ATO), and antimony-doped zinc oxide are dispersed. Can also be laminated. Among them, a resin layer in which ITO fine particles or ATO fine particles are dispersed can be preferably exemplified as a material having excellent infrared absorptivity.

  In the heat shield film 1 of this embodiment, the heat shield layer 31 made of the heat shield material 3 a is formed on the adhesive layer 3. For this reason, by disposing the heat-shielding film 1 on the glass body 5, for example, in summer when the temperature is high, heat from sunlight can be blocked and temperature rise in the room or in the vehicle can be suppressed. Cost can be kept low.

  Moreover, since the peeling layer 4 is formed between the light-transmitting film 2 and the adhesive layer 3, the thermal insulation film 1 is separated between the peeling layer 4 and the adhesive layer 3, and the release layer 4 The light transmissive film 2 can be peeled off. When the thermal barrier film 1 is peeled from the release layer 4, the adhesive layer 3 remains on the glass body 5, but the adhesive layer 3 can be easily washed and removed with water (warm water), alcohol or the like. Therefore, even in winter, by taking in sunlight, a decrease in room temperature can be suppressed, and heating costs can be suppressed low. And since the adhesion layer 3 after peeling removes the heat-shielding film 1 from the glass body 5 neatly, there is no possibility of harming the external appearance of the glass body 5. FIG.

  The heat shield film 1 of the present invention includes a light transmissive film 2, an adhesive layer 3 containing a heat shield material 3 a, and a release layer 4 formed between the light transmissive film 1 and the adhesive layer 3. Yes.

  In the heat shielding film 1, the adhesive layer 3 preferably has water solubility or alcohol solubility.

  The thermal barrier glass structure of the present invention is a thermal barrier glass structure including the thermal barrier film 1 described above. The adhesive layer 3 side of the heat shield film 1 is adhered to one surface of the glass body 5, and the heat shield film 1 can be peeled from the release layer 4 with respect to the glass body 5.

  The heat shield film and the heat shield glass structure of the present invention are not limited to the above embodiments.

DESCRIPTION OF SYMBOLS 1 Heat-shield film 2 Light-transmitting film 3 Adhesive layer 3a Heat-shield material 4 Peeling layer 5 Glass body

Claims (3)

A light transmissive film;
An adhesive layer containing a heat shielding material;
A release layer formed between the light transmissive film and the adhesive layer;
A thermal barrier film characterized by comprising:   The heat-shielding film according to claim 1, wherein the adhesive layer has water solubility or alcohol solubility. A thermal barrier glass structure comprising the thermal barrier film according to claim 1 or 2,
The heat-shielding glass, wherein the adhesive layer side of the heat-shielding film is bonded to one surface of the glass body, and the heat-shielding film can be peeled from the release layer with respect to the glass body. Structure.

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