JP2012197570A - Daylighting heat-insulating material - Google Patents

Abstract

Provided is a daylighting heat insulating material having high heat insulating properties, high translucency, and high compressive strength.
A lighting heat insulating material (1) comprising a plurality of resin sheets (2) laminated via a plurality of resin spacers (3), wherein the resin sheet (2) has translucency and the resin spacer (3) The lighting insulation material 1 comprised by the hardened | cured material of the curable resin composition.
[Selection] Figure 1

Description

  The present invention relates to a daylighting heat insulating material used for a building or the like, and more particularly, to a daylighting heat insulating material having a structure in which a plurality of resin sheets are laminated via an air layer.

  When considering the living environment of a building, the lighting of the building is extremely important. In current buildings, it is common to install glass windows in the daylighting section. However, the glass window has low heat insulation. Therefore, there has been a problem that the efficiency of cooling and heating is reduced due to heat being released through the glass window or heat entering. According to the “Energy Conservation Technology Strategy Report” (June 12, 2002, Ministry of Economy, Trade and Industry), it is said that 45% of all energy consumed is lost through openings such as windows.

  In recent years, from the viewpoint of energy saving, attempts have been made to increase the efficiency of cooling and heating to the limit by enhancing the heat insulation from the outside. For this purpose, various wall materials having high heat insulation properties have been proposed. However, it has been difficult to enhance the heat insulation of the glass window as compared with wall materials and the like. Therefore, a method for improving the heat insulating property of the glass window is required.

  As a method for improving the heat insulating property of the glass window, for example, a method of attaching a daylighting heat insulating material to the glass window can be mentioned. For example, Patent Literature 1 below discloses a daylighting heat insulating material including a plurality of translucent sheets stacked via a plurality of resin spacers arranged in parallel to each other. Examples of the spacer resin used for the daylighting heat insulating material include acrylic resins, silicone rubbers, ethylene vinyl acetate copolymers, styrene elastomers, and polyesters. Moreover, the following patent document 2 describes a method for manufacturing the daylighting heat insulating material as described above. That is, a method is disclosed in which a resin spacer is formed by discharging a molten resin onto a resin film, and a step of repeating the step of laminating the resin film is repeated.

JP 2008-114583 A Japanese Patent No. 4608595

  The spacer of the daylighting heat insulating material described in Patent Documents 1 and 2 behaves as an elastomer (viscoelastic body) at room temperature. Therefore, the daylighting heat insulating materials of Patent Documents 1 and 2 are weak against the force from the outside in the stacking direction and have a low compressive strength. Therefore, the daylighting heat insulating materials of Patent Documents 1 and 2 have a problem that they are easily deformed over time and cannot be stored in multiple stages.

  An object of the present invention is to provide a daylighting heat insulating material having high heat insulating properties, high translucency, and high compressive strength.

  The daylighting heat insulating material of the present invention is a daylighting heat insulating material provided with a plurality of resin sheets laminated via a plurality of resin spacers, wherein the resin sheet has translucency, and the resin spacer is post-cured. It is comprised by the hardened | cured material of a conductive resin composition.

  On the specific situation with the lighting insulation material of this invention, the thickness of the said resin sheet is the range of 10 micrometers-300 micrometers. In that case, the strength of the daylighting heat insulating material can be sufficiently increased without making the daylighting heat insulating material thicker than necessary.

  In another specific aspect of the daylighting heat insulating material of the present invention, the daylighting heat insulating material includes three or more resin sheets. In that case, the heat insulating property of the lighting heat insulating material can be further improved.

  In another specific aspect of the daylighting heat insulating material of the present invention, the plurality of resin spacers are arranged so as to overlap in the stacking direction of the resin sheets via the resin sheets. In that case, the designability and translucency of a lighting heat insulating material can be improved more.

  In still another specific aspect of the daylighting heat insulating material of the present invention, the plurality of resin spacers are arranged in a lattice shape. In that case, the airtightness between the plurality of resin sheets is increased. Therefore, the heat insulating property of the daylighting heat insulating material can be further improved.

  In still another specific aspect of the daylighting heat insulating material of the present invention, the resin spacer has translucency. In that case, the translucency of a lighting heat insulating material can further be improved.

  In the daylighting heat insulating material of the present invention, a plurality of light transmitting resin sheets are laminated via a plurality of resin spacers, so that the daylighting heat insulating material has high heat insulating properties and light transmitting properties. Furthermore, since the resin spacer is composed of a cured product of the post-curing resin composition, the daylighting heat insulating material has a high compressive strength. Therefore, according to the present invention, it is possible to provide a daylighting heat insulating material having high heat insulating properties, high translucency, and high compressive strength.

It is the schematic sectional drawing to which a part of lighting insulation material concerning one embodiment of the present invention was expanded.

  Hereinafter, the present invention will be clarified by describing specific embodiments of the present invention with reference to the drawings.

  As shown in FIG. 1, the daylighting heat insulating material 1 includes a plurality of resin sheets 2. Preferably, the daylighting insulating material 1 includes three or more resin sheets 2. In that case, since the daylighting heat insulating material 1 includes a plurality of air layers 5 to be described later, the heat insulating property can be further improved. In the present embodiment, the daylighting heat insulating material 1 includes six resin sheets 2.

  The resin used as the material of the plurality of resin sheets 2 is not particularly limited as long as it has translucency. For example, polyethylene terephthalate, polycarbonate, polyethylene, acrylic resin, polyvinyl chloride, polyvinyl alcohol, cellulose triacetate, and combinations thereof Etc. The resins that are the materials of the plurality of resin sheets 2 may all be the same or different.

  In the present invention, “having translucency” means that the visible light transmittance is 20% or more.

  Although the thickness of the some resin sheet 2 is not specifically limited, A preferable minimum is 10 micrometers and a preferable upper limit is 300 micrometers. When the thickness of the plurality of resin sheets 2 is less than 10 μm, the strength of the obtained lighting heat insulating material may be inferior. If the thickness of the plurality of resin sheets 2 exceeds 300 μm, the daylighting heat insulating material may become thicker than necessary to obtain the same heat insulating effect. More preferably, the minimum of the thickness of the some resin sheet 2 is 20 micrometers, and an upper limit is 200 micrometers. The thicknesses of the plurality of resin sheets 2 may all be the same or different.

  The plurality of resin sheets 2 are stacked via a plurality of resin spacers 3. An air layer 5 is formed between the adjacent resin sheets 2 by the plurality of resin spacers 3. The heat resistance of the lighting heat insulating material 1 is enhanced by the air layer 5. Moreover, when the several air layer 5 is formed in the lighting insulation material 1 like this embodiment, the heat insulation of the lighting insulation material 1 can be improved more.

  The plurality of resin spacers 3 are constituted by a cured product obtained by curing a post-curing resin composition by a post-curing reaction. Since the said hardened | cured material is hardened by postcure, the compressive strength of the daylighting heat insulating material 1 can be raised. The method for post-curing the post-curing resin composition is not particularly limited, and is appropriately selected depending on the post-curing resin composition. Examples of the post-curing method include thermal curing, photocuring, and moisture curing.

  The post-curing resin composition is not particularly limited as long as it is a resin composition that can be cured by a post-curing reaction. As the resin component for the post-curing resin composition, for example, epoxy resin, phenol resin, silicone resin, urethane resin, urea resin, melamine resin, and combinations thereof are preferably used. The post-curing resin compositions used for the plurality of resin spacers 3 may all be the same or different.

  The post-curable resin composition may contain various other components in addition to the resin. For example, when the post-curing resin composition is post-cured by photocuring, it preferably contains a radical photopolymerization agent or a cationic photopolymerization initiator.

  As the post-curing resin composition, preferably, a silicone resin composition or an epoxy resin composition is used. The silicone resin composition may be, for example, a moisture curable resin composition such as a deoxime-type silicone resin. The epoxy resin composition may be, for example, a photocurable resin composition including an epoxy resin such as bisphenol F type, an alcohol such as trimethylolpropane, and a photopolymerization initiator.

  The cured product preferably has flexibility. When the flexibility of the cured product is low, the resin spacer 3 becomes brittle and may be easily broken.

  The cured product preferably has translucency. In that case, the translucency of the lighting heat insulating material 1 can further be improved.

  The cured product preferably has high heat insulating properties so as not to hinder the heat insulating performance of the daylighting heat insulating material 1.

  The shape of the plurality of resin spacers 3 is not particularly limited as long as the air layer 5 can be formed, and may be, for example, a particle shape, a linear shape, a lattice shape, or the like. The plurality of resin spacers 3 may all have the same shape or different shapes. Moreover, you may provide the designability to the lighting heat insulating material 1 with the shape of the some resin spacer 3. FIG.

  Especially, it is preferable that the shape of the plurality of resin spacers 3 is a lattice shape. In that case, the air layer 5 can be efficiently divided, and the periphery of the air layer 5 can be efficiently sealed. Thereby, the independence and airtightness of the divided air layer 5 can be enhanced. Accordingly, the heat insulating property of the daylighting heat insulating material 1 can be further improved.

  When the lighting insulation 1 includes three or more resin sheets 2, the plurality of resin spacers 3 are stacked in the stacking direction of the resin sheets 2 via the resin sheets 2 as shown in FIG. 1. It is preferable that they are arranged. In that case, a decrease in translucency of the daylighting heat insulating material 1 due to the resin spacer 3 can be minimized.

  The air layer 5 is preferably divided into a plurality of cells by a plurality of resin spacers 3. Thereby, the independence and airtightness of the individual cells of the air layer 5 can be enhanced. Accordingly, the heat insulating property of the daylighting heat insulating material 1 can be further improved. Further, the compression strength of the daylighting heat insulating material 1 can be further increased by the resin spacer 3 used for dividing the air layer 5.

When dividing the air layer 5 into a plurality of cells, preferred lower limit is 4 cm 2 in size for each cell in the air layer ^5, the upper limit thereof is preferably 1800 cm ^2. When the size of each cell of the air layer 5 is less than 4 cm ² , the visible light transmittance of the obtained lighting insulation 1 may be inferior. When the size of each cell of the air layer 5 exceeds 1800 cm ² , the compression strength of the obtained lighting heat insulating material 1 may be inferior. More preferably, the lower limit of the size of each cell of the air layer 5 is 25 cm ² and the upper limit is 600 cm ² .

  The lighting heat insulating material 1 of the present invention can be manufactured by using a post-curing resin composition to manufacture a laminate of the resin sheet 2 by a known method and then post-curing the spacer. The laminated body of the said resin sheet 2 can be manufactured with the manufacturing apparatus and manufacturing method of patent document 2, for example. The method of post-curing the spacer is appropriately selected depending on the post-curable resin composition. For example, in the case where the post-curable resin composition is a photoreactive hot melt adhesive, the daylighting heat insulating material 1 of the present invention is obtained by irradiating ultraviolet rays after the laminate of the resin sheet 2 is manufactured. Can do.

  As described above, in the daylighting heat insulating material of the present invention, since the plurality of resin sheets are laminated via the plurality of resin spacers, the daylighting heat insulating material is highly insulated by the air layer formed between the adjacent resin sheets. Have sex. Moreover, since the resin sheet has translucency, the lighting heat insulating material has high translucency. Furthermore, since the resin spacer is composed of a cured product of the post-curing resin composition, the daylighting heat insulating material has a high compressive strength. Therefore, according to the present invention, it is possible to provide a daylighting heat insulating material having high heat insulating properties, high translucency, and high compressive strength.

  The daylighting heat insulating material of the present invention can exhibit high heat insulating performance, for example, by installing it in a daylighting part of a building alone or in combination with ordinary glass.

  Although it does not specifically limit as an installation aspect of the lighting insulation material of this invention, For example, in the bay window-shaped daylighting part by a normal glass, installing away from this glass inside this glass can be considered. By installing the daylighting heat insulating material of the present invention so as to be removable, the daylighting heat insulating material of the present invention can be used according to the season and purpose. Moreover, it is good also as a shape which can open and close the lighting insulation material of this invention.

  Hereinafter, the present invention will be clarified by giving specific examples of the present invention. In addition, this invention is not limited to a following example.

(Manufacture of resin sheet laminate)
Under the atmosphere of 23 ° C. and 50% relative humidity, the resin sheet laminates of Examples 1 and 2 and Comparative Example were manufactured by the following manufacturing method.

  By discharging the resin spacer composition onto a single PET film (trade name “Cosmo Shine A4300”, manufactured by Toyobo Co., Ltd., thickness 200 μm), a linear resin spacer composition having a diameter of 0.56 mm is used. Twenty products were applied at a pitch of 50 mm. Subsequently, another PET film was laminated on the PET film before the resin spacer composition was solidified. Subsequently, the resin spacer composition was applied with the same diameter and the same pitch so that the resin spacer composition overlapped with the PET film in the stacking direction via the PET film. These were repeated to obtain a five-layer resin sheet laminate in which six PET films were laminated.

Example 1
Using a silicone thermosetting resin composition (trade name “silicone sealant # 8060” manufactured by Cemedine Co., Ltd.) as a resin spacer composition, a five-layer resin sheet laminate was obtained by the above-described production method.

Thereafter, the resin sheet laminate was allowed to stand at room temperature for 1 day in a production site room, and the silicone thermosetting resin composition used for the resin sheet laminate was post-cured by room humidity to obtain a daylighting heat insulating material. The total thickness of the daylighting heat insulating material was 4 mm, and the surface weight was 1.7 kg / m ² .

(Example 2)
As an epoxy resin, bisphenol F type epoxy resin that is solid at room temperature and normal pressure (product name “E4004P”, manufactured by Japan Epoxy Resin Co., Ltd.), 77 parts by weight, liquid at room temperature and normal pressure. Bisphenol F type epoxy resin (trade name “EP807” manufactured by Japan Epoxy Resin Co., Ltd., 10 parts by weight of the number average functional group of epoxy groups in one molecule), trimethylolpropane (manufactured by Mitsubishi Gas Chemical Co., Inc., 1 Number average functional group number of primary hydroxyl group in molecule 3) 2.6 parts by weight, alcohol (trade name “DCB-1000”) which is a copolymer of tetramethylene oxide and propylene oxide, of primary hydroxyl group in molecule Number average functional group number 2, Nippon Oil & Fats Co., Ltd. 10.4 parts by weight, and photopolymerization initiator (Union Carbide, trade name “UVI6” 90 ") blended with 1 part by weight, melt-kneaded, to prepare a resin spacer composition. The EPO equivalent of the epoxy group of the epoxy resin was 673 g / eq, and the OH equivalent of the primary hydroxyl group of the alcohol was 1301 g / eq. The molar ratio of the epoxy group of the epoxy resin to the primary hydroxyl group of the alcohol was 1.9.

  Using the resin spacer composition, a five-layer resin sheet laminate was obtained by the above-described production method.

Then, using an ultrahigh pressure mercury lamp, the resin spacer composition used for the resin sheet laminate was post-cured by irradiating light with a wavelength of 365 nm with an irradiation intensity of 50 mW / cm ² for 1 minute, A lighting insulation was obtained. The total thickness of the daylighting heat insulating material was 4 mm, and the surface weight was 1.7 kg / m ² .

(Comparative example)
Using acrylic elastomer as the resin spacer composition, a five-layer resin sheet laminate was obtained by the above-described production method. The said resin sheet laminated body was used as the lighting insulation material of the comparative example. The total thickness of the daylighting heat insulating material was 4 mm, and the surface weight was 1.7 kg / m ² .

(Evaluation of compressive strength)
Ten pieces of the daylighting heat insulating material of Example 1 cut so as to have an area of 1 m × 1 m were stacked. Similarly, 10 pieces of the daylighting heat insulating material of Example 2 cut so as to have an area of 1 m × 1 m were stacked. In addition, 10 lighting insulation materials of comparative examples cut so as to have an area of 1 m × 1 m were stacked. Thereafter, the stacked daylight insulation materials of Examples 1 and 2 and the comparative example were allowed to stand for 1 week in a stacked state.

  As a result, the daylighting heat insulating materials of Examples 1 and 2 were not deformed and maintained a total thickness of 4 mm. In the heat insulating material of the comparative example, the resin spacer was obliquely displaced, and the total thickness of 4 mm could not be maintained.

DESCRIPTION OF SYMBOLS 1 ... Daylight insulation material 2 ... Resin sheet 3 ... Resin spacer 5 ... Air layer

Claims (6)

A lighting heat insulating material comprising a plurality of resin sheets laminated through a plurality of resin spacers,
The resin sheet has translucency,
A daylighting heat insulating material, wherein the resin spacer is composed of a cured product of a post-curing resin composition.   The lighting heat insulating material according to claim 1, wherein the resin sheet has a thickness in a range of 10 μm to 300 μm.   The daylighting heat insulating material according to claim 1, comprising three or more resin sheets.   The daylighting heat insulating material according to claim 3, wherein the plurality of resin spacers are disposed so as to overlap each other in the stacking direction of the resin sheets via the resin sheets.   The lighting heat insulating material according to any one of claims 1 to 4, wherein the plurality of resin spacers are arranged in a lattice pattern.   The daylighting heat insulating material according to claim 1, wherein the resin spacer has translucency.

Images