JP2000185360A - Functional material laminate and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively, simply apply to a window glass and to prevent performance deterioration with moisture evaporation by sealing a functional material made of a water soluble polymer compound, a nonionic surfactant and/or an inorganic electrolyte and water between vinylidene chloride resin or vinylidene chloride resin-coated films. SOLUTION: A functional material 3 containing a water soluble polymer compound, a nonionic surfactant and/or an inorganic electrolyte and water is sealed between two transparent sealing films 2 having excellent gas barrier properties and covered with vinylidene chloride resin or vinylidene chloride resin to prevent moisture evaporation from the film surfaces. The material 3 has a thermotropic function for switching a light transmission state and a light shielding state according to a temperature change. As the material 3, a nonionic surfactant or an isotropic water solution of nonionic water soluble polymer exhibiting a cloud point phenomenon is used. Thus, the water evaporation from the film 2 surface is suppressed, a composition change in the material 3 is prevented, and good quality can be maintained for a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a water-soluble polymer compound such as a light control glass, a nonionic surfactant and / or a non-ionic surfactant.
Alternatively, the present invention relates to a functional material laminate obtained by laminating a functional material containing an inorganic electrolyte and water as constituents, and a method for producing the same.

[0002]

2. Description of the Related Art A functional material laminate (hereinafter simply referred to as a laminate) is formed by laminating a liquid or wet gel-like functional material between two transparent plates and sealing a peripheral portion thereof with a sealing material. As described in, for example, JP-A-6-255016, a thermotropic state in which the state changes from a transparent state to a cloudy state due to a temperature rise as a functional material between two glass plates arranged in parallel. There has been proposed a thermotropic light control glass in which various polymer aqueous solutions are laminated. In addition, this thermotropic light control glass has been spotlighted because it is more durable, has better light shielding properties than light control glass using liquid crystal and the like, and is inexpensive.

[0003]

However, since the thermotropic light control glass is laminated with a thermotropic material between two pieces of glass, it becomes thicker than a general-purpose window glass, and the general-purpose light-controlling glass becomes thicker. There is no way to assemble it on a window glass sash. For this reason, a window glass using this light control glass needs to use a special sash as a sash, which is more expensive than a general-purpose window glass, and is difficult to apply to an existing window glass. On the other hand, general-purpose polyolefins and P
Although it is conceivable to enclose a thermotropic polymer aqueous solution between sealing films such as VC, even if the peripheral part is completely sealed, the gas barrier properties of the sealing film itself are not so good. There is a problem that the performance is deteriorated, for example, the moisture evaporates, the composition of the encapsulated thermotropic material changes, and the temperature of the state change shifts to a lower temperature side.

[0004] It is an object of the present invention to provide a functional material laminate which can be applied to a window glass at low cost and simply, and which can prevent performance deterioration due to evaporation of moisture, and a method for producing the same.

[0005]

Means for Solving the Problems and Their Functions The present inventors have conducted intensive studies in order to solve the above problems, and as a result,
As a sealing film for enclosing a functional material such as a thermotropic material, the present inventors have found that the above problems can be solved by using a vinylidene chloride resin or a transparent sealing film coated with a vinylidene chloride resin. Was completed.

The functional material laminate according to the first aspect is characterized in that a water-soluble polymer compound, a nonionic surfactant and / or an inorganic electrolyte are interposed between a vinylidene chloride resin or a film coated with a vinylidene chloride resin. , And a functional material containing water as a constituent component. In this functional material laminate, as the sealing film, a vinylidene chloride resin having a low gas permeability or a transparent sealing film coated with a vinylidene chloride resin is used, so that evaporation of water from the film surface is prevented. It is possible to suppress the change of the composition of the functional material. Further, such a functional material laminate can be easily fixed to an existing general-purpose window glass via an adhesive tape, an adhesive, or the like, and the existing window glass can be easily used as a light control glass. Further, when at least one of the sealing films has an adhesive property or an adhesive layer formed on the outer surface, it is preferable because it can be easily fixed to glass.

A functional material laminate according to a third aspect of the present invention comprises a vinylidene chloride resin or a transparent sealing film coated with a vinylidene chloride resin, a water-soluble polymer compound, a nonionic surfactant, In this case, a functional material containing a component and / or an inorganic electrolyte and water as constituents is enclosed. In this functional material laminate, claim 1
Similarly to the above, since a transparent sealing film coated with vinylidene chloride resin or vinylidene chloride resin is used as the sealing film, evaporation of water from the film surface is suppressed, and the composition of the functional material is changed. Can be suppressed. In addition, since the thicknesses of the sealing film and the functional material are extremely thin, if the glass of a general-purpose window glass is used as the base, the functional material laminate can be assembled to a general-purpose sash. In addition, by attaching a functional material laminate instead of glass to an existing window glass, the existing window glass can be easily made to be a light control glass.

[0008] As described in claim 4, the functional material laminate in which the substrate is fixed directly on the outer surface of one of the sealing films or via an adhesive, the thickness of the sealing film and the functional material itself is not increased. Since it is extremely thin, the use of a general-purpose window glass as the base makes it possible to mount the functional material laminate on a general-purpose sash. In addition, by attaching a functional material laminate instead of glass to an existing window glass, the existing window glass can be easily made to be a light control glass. Furthermore, in the case where the sealing film and the functional material are arranged between the substrates as described in claim 5 or 6, since the film surface is not exposed, the durability such as scratches and the like are less likely to occur. Is improved and preferred.

A method for producing a functional material laminate according to claim 7 is characterized in that a water-soluble polymer compound and a nonionic surfactant are interposed between transparent sealing films coated with vinylidene chloride resin or vinylidene chloride resin. And / or an inorganic electrolyte and a functional material having water as constituents are supplied, and one sealing film is pressed against the other sealing film side substantially linearly by the pressing means, and the sealing means and the sealing means are sealed. The stopper film is relatively moved to squeeze out the excess functional material between the sealing films, and is sealed between the sealing films while extruding bubbles in the functional material to the outside. According to this method, the functional material laminate according to claim 1 or 2 can be continuously manufactured while preventing air bubbles from being mixed into the functional material, which is preferable.

[0010] The method of manufacturing a functional material laminate according to claim 8 is a method for manufacturing a laminate of a functional material, comprising: a transparent sealing film coated with vinylidene chloride resin or vinylidene chloride resin; While supplying a functional material comprising a water-soluble surfactant and / or an inorganic electrolyte and water as constituents, and pressing the sealing film to the substrate side substantially linearly by the pressing means, the pressing means and the sealing film are used. Are relatively moved to squeeze out the surplus functional material between the sealing film and the base, and to seal the space between the sealing film and the base while extruding bubbles in the functional material to the outside. According to this method, the functional material laminate according to claim 3 can be continuously manufactured while preventing air bubbles from being mixed into the functional material, which is preferable. As described in claim 9, after encapsulating the functional material, the base material is fixed to the outer surface of at least one of the sealing films directly or via an adhesive, whereby the functional material laminate according to claims 4 to 6 is formed. Can be manufactured.

The functional material laminate of the present invention can be attached to an existing window glass, or replaced, or
It can be used as a newly-installed light control glass, and it can be used for vertical windows, skylights, louver windows, sliding windows, blind windows, bay windows, outside windows, sideways windows, double-sided windows, vertical windows in general houses and buildings, etc. Sliding windows, corner windows, terrace doors, waist panel doors, interior doors at high altitudes, patio doors, solariums, greenhouse glass, arcades for large facilities, top lights, sunroofs for automobiles, rear windows, building exterior walls and thermal storage walls Etc. can be used.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a functional material laminate 1 basically includes a water-soluble polymer compound between two transparent sealing films 2 coated with vinylidene chloride resin or vinylidene chloride resin. , A non-ionic surfactant and / or an inorganic electrolyte, and a functional material 3 containing water as a constituent component.

In this functional material laminate 1, the sealing film 2 is formed of a vinylidene chloride resin or a resin film coated with a vinylidene chloride resin and having excellent gas barrier properties, so that moisture from the film surface can be reduced. It is configured such that evaporation can be prevented and deterioration of the quality of the functional material laminate 1 due to a change in the composition of the functional material 3 can be prevented. Examples of the vinylidene chloride resin film used in the sealing film 2 include a copolymer resin film obtained by copolymerizing a vinylidene chloride monomer and another vinyl monomer, and a homopolymer resin film of vinylidene chloride. As a film coated with vinylidene chloride resin, a biaxially oriented polypropylene, a nylon film, a cellophane film, a polyvinyl chloride film or the like as a base film, a copolymer resin obtained by copolymerizing a vinylidene chloride monomer and another vinyl monomer, Films coated with a homopolymer resin of vinylidene chloride are included.
Here, vinyl chloride, vinyl acetate, methyl acrylate, methyl methacrylate, acrylonitrile, etc. are used as other vinyl monomers. However, the two sealing films 2 may be of the same type or different types.

The functional material 3 has a thermotropic function of switching between a light-transmitting state and a light-shielding state by a change in temperature. Such a material shows a transparent state at a lower temperature and a cloudy state at a higher temperature from a cloud point determined by the composition ratio of the components. In a transparent state, light in the visible region can be transmitted with little absorption and reflection. In the cloudy state, light is scattered by the aggregated particles, and transmitted light can be suppressed.

In general, as the thermotropic functional material having such properties, there is an isotropic aqueous solution of a nonionic surfactant or a nonionic water-soluble polymer exhibiting a cloud point phenomenon. Specific examples thereof include a polyvinyl alcohol partial acetal product, an aqueous solution of methylcellulose, and hydroxypropylcellulose, but in terms of sufficiently shielding sunlight, a water-soluble polymer having a hydroxypropyl group having a good hydrophobic-hydrophilic balance. And hydroxypropylcellulose having a structurally stable cellulose in the main chain is preferable. However, the present invention is not limited to this.

On the other hand, when an aqueous solution of hydroxypropylcellulose or the like is used alone, macroscopic phase separation may occur when the state changes and becomes cloudy. However, by adding an amphipathic molecule such as a nonionic surfactant having both a hydrophilic part and a hydrophobic part to this, macroscopic phase separation can be suppressed, and a microscopic phase separation state can be maintained for a long time. Here, macroscopic phase separation means that aggregation of hydroxypropylcellulose and the like progresses with time, and these aggregates and water as a solvent are almost completely separated. On the other hand, with micro-phase separation, although aggregation partially occurs, the progress of aggregation at a certain level or more is suppressed,
It means a state in which these aggregates are substantially uniformly dispersed in the solvent, which is clearly different from those in which these aggregates settle out and are clearly separated from the solvent.

For the above reasons, it is preferable to add a nonionic surfactant. As such a nonionic surfactant, those having a molecular weight of about 3000 or less in the oligomer region, more preferably about 1000 or less are easy to use, and the ionic group has a very large hydrophilic group. Therefore, the hydrophobic group is preferably a higher alkyl group. Specific examples include polyoxypropylene 2-ethyl-2-hydroxymethyl-1,3-propanediol (polyoxypropylene trimethylolpropane ether), polypropylene glycol, diethylene glycol monobutyl ether, polyoxypropylene glycerin, and sodium lauryl sulfate. For example, any substance having the same action can be used. The addition of an inorganic electrolyte such as sodium chloride to control the cloud point of the functional material 3 of the present invention is also within the scope of the present invention. Thereby, the cloud point can be shifted to the low temperature side.

Regarding the compounding ratio (addition amount) of the substance constituting the functional material 3, the optical characteristics (transmittance and reflectance at the time of light transmission and light shielding) when used as the light control glass, and the functional material 3 The optimum blending is determined in consideration of the viscosity at the time of clouding, the cloud point suitable for the place of use, and the like. Essentially, the amount of the inorganic electrolyte such as sodium chloride is adjusted so that the cloud point becomes a desired value. Thereby, the cloud point of the functional material 3 of the present invention can be arbitrarily set to a temperature lower than approximately 55 ° C. It is also within the scope of the present invention to add additives such as antioxidants, antifreezing agents, and stabilizers to these solutions.

In another embodiment of the functional material laminate 1, when at least one of the sealing films 2 is made of a material having adhesiveness or a material having an adhesive layer formed on an outer surface thereof, it can be applied to existing glass. It is preferable because it can be easily fixed.
Further, as in a functional material laminate 1A shown in FIG. 2, at least a part or all of a transparent substrate 4 is bonded to a bonding layer 5 on the outside of a sealing film 2 coated with vinylidene chloride resin or vinylidene chloride resin. Also fixed through
It is included in the category of the present invention.

As the substrate 4, a flat inorganic glass or an organic glass such as polycarbonate is usually used. Heat reflection glass, low radiation glass, laminated glass, tempered glass,
Double strength glass, UV cut glass, netted glass, template glass, frosted glass, etc. can be arbitrarily adopted. The base 4 is
When used as a light control glass, it is usually made transparent, but a part of the base 4 may be made opaque, and when it is used as an outer wall of a building, at least one is made opaque. It may be composed of a simple glass plate, a metal plate or the like.

The adhesive layer 5 can be made of a known material as long as it fixes the sealing film 2 and the base 4 and does not impair the appearance. As the adhesive layer 5, a material having an ultraviolet shielding function or a material having an anti-scattering function is used. Instead of the adhesive layer 5, for example, a sun stop resin manufactured by Daito Chemitronics Co., Ltd. The sealing film 2 and the base 4 may be bonded to each other using a combination of the above.

As shown in a functional material laminate 1B shown in FIG. 3, the functional material 3 is placed between the sealing film 2 and the base 4.
May be encapsulated, or the sealing film 2 and the functional material 3 may be disposed between one base 4 as in the functional material laminates 1C and 1D shown in FIGS. What sealed between the peripheral parts with the sealing material 6 is also in the category of the present invention.

Next, a method of manufacturing the functional material laminate will be described. First, as shown in FIG. 6, the sealing film 2 is formed on a base by using a holding means 7 having a flat base base 8 and a roll 9 and arranging the base base 8 and the roll 9 in parallel at regular intervals. It sets on the stand 7, further sets another sealing film 2 on it, supplies the functional material 3 between both sealing films 2, and lowers the upper sealing film 2 with the roll 9 While moving the roll 9 to the left while pressing it substantially linearly to the side of the sealing film 2, the excess functional material 3 between the two sealing films 2 is squeezed out, and the bubbles in the laminate are discharged to the outside. While discharging, a long functional resin laminate in which the functional material 3 is filled between the two sealing films 2 is continuously manufactured.

Next, the functional material laminate 1 is obtained by cutting the long functional material laminate to a required size and heat-sealing the outer peripheral portion. However, the outer peripheral portion of the functional material laminate 1 may be sealed with an adhesive, or the seal portion may be further sealed with an aluminum tape or the like.

When the functional material laminate 1B is manufactured, the base 4 is set on the base 8 and the sealing film 2 is set thereon. The functional material 3 is supplied, and the upper sealing film 2 is moved to the left side of the roll 9 while being substantially linearly pressed toward the base 4 by the roll 9, and the excess function between the sealing film 2 and the base 4 is obtained. The functional material 3 is filled between the sealing film 2 and the base 4 while squeezing out the functional material 3 and discharging bubbles in the laminate to the outside. Further, when the functional material laminates 1A, 1C, and 1D are manufactured, an adhesive is applied to the sealing film 2 of the functional material laminates 1 and 1B manufactured as described above, and the base 4 is formed. It will be fixed by bonding.

[0026]

Next, an example of a specific example will be described. Comparative Example 1 A functional material was prepared as follows. Hydroxypropylcellulose (HPC-L, manufactured by Nippon Soda Co., Ltd., hereinafter referred to as HPC) as a water-soluble polymer, and polyoxypropylene trimethylolpropane ether as a nonionic surfactant (Sannicks Triol TP-, manufactured by Sanyo Chemical Industries, Ltd.) 400), 3% as inorganic electrolyte and water
The aqueous sodium chloride solutions were mixed at a weight ratio of 5: 1: 9, respectively. 300x300mm as sealing film
A 100 μm thick polypropylene film was used. A functional material was filled between the sealing films, the periphery was sealed with an adhesive, and the sealing portion was further sealed with an aluminum tape to obtain a functional material laminate.

Example 1 A functional material was prepared as follows. Hydroxypropylcellulose (HPC-L, manufactured by Nippon Soda Co., Ltd., hereinafter referred to as HPC) as a water-soluble polymer, and polyoxypropylene trimethylolpropane ether as a nonionic surfactant (Sannicks Triol TP-, manufactured by Sanyo Chemical Industries, Ltd.) 400), 3% aqueous sodium chloride solution as the inorganic electrolyte and water, respectively:
The mixture was mixed at a weight ratio of 1: 9. As a sealing film, 30
A 100 μm thick polypropylene film coated on both sides with a vinylidene chloride resin of 0 × 300 mm was used. A functional material was filled between the sealing films, the periphery was sealed with an adhesive, and the sealing portion was further sealed with an aluminum tape to obtain a functional material laminate.

The functional material laminates of Comparative Example 1 and Example 1 were left in close contact with the window glass, and the appearance was observed. Table 1 shows the results.

[0029]

[Table 1]

As shown in Table 1, Comparative Example 1 and Example 1
One day after the production, the functional material laminate changes its state between a transparent state and a cloudy state when the surface temperature is between 25 ° C. and 35 ° C., and can control solar radiation indoors well. However, in the functional material laminate of Comparative Example 1 using a polypropylene film, the surface temperature was 25 ° C., the state became cloudy, and deterioration of performance was observed after one month. On the other hand, in the functional material laminate of Example 1 using a polypropylene film coated on both sides with vinylidene chloride resin, the surface temperature was found to be 25 after one month.
At 0 ° C., it is clear that the composition is in a transparent state and the deterioration of performance is prevented.

[0031]

According to the functional material laminate of the first aspect, as the sealing film, a vinylidene chloride resin having a low gas permeability or a transparent sealing film coated with a vinylidene chloride resin is used. Therefore, it is possible to suppress the evaporation of water from the film surface, suppress a change in the composition of the functional material, and provide a functional material laminate that can maintain good quality for a long period of time. In addition, this functional material laminate can be easily fixed to an existing general-purpose window glass via an adhesive tape, an adhesive, or the like, and the existing window glass can be easily made into a light control glass. Become. As described in claim 2, when at least one of the sealing films is a film having adhesiveness or a film having an adhesive layer formed on an outer surface, a functional material laminate can be easily formed on an existing window glass. It can be mounted.

According to the functional material laminate of the third aspect, the sealing film is made of a vinylidene chloride resin having a low gas permeability or a transparent sealing film coated with a vinylidene chloride resin. It is possible to suppress the evaporation of water from the film surface, suppress the change in the composition of the functional material, and provide a functional material laminate that can maintain good quality for a long period of time. Moreover, since the thicknesses of the sealing film and the functional material are extremely thin, if the glass of the general-purpose window glass is used as the base, the functional material laminate can be assembled to the general-purpose sash. In addition, by attaching a functional material laminate instead of glass to an existing window glass, the existing window glass can be easily made to be a light control glass.

If the base is fixed directly or via an adhesive to the outer surface of one of the sealing films, the thicknesses of the sealing film and the functional material are extremely thin. By using a general-purpose window glass, it becomes possible to attach the functional material laminate to a general-purpose sash. In addition, by attaching a functional material laminate to the existing window glass instead of glass,
It is possible to easily use the existing window glass as the light control glass. Further, when the sealing film and the functional material are arranged between the substrates as described in claim 5 or 6, the film surface does not come out, so that the durability such as scratches and the like are hardly generated is improved. And preferred.

According to the method of manufacturing a functional material laminate according to claim 7, the functional material laminate according to claim 1 or 2 is continuously formed while preventing air bubbles from being mixed into the functional material. It is preferable because it can be manufactured. According to the method for producing a functional material laminate according to claim 8, the functional material laminate according to claim 3 can be produced continuously while preventing air bubbles from being mixed into the functional material. Is preferable. As described in claim 9, after encapsulating the functional material, the base material is fixed to the outer surface of at least one of the sealing films directly or via an adhesive, whereby the functional material laminate according to claims 4 to 6 is formed. Can be manufactured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a functional material laminate of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of a functional material laminate having another configuration.

FIG. 3 is a longitudinal sectional view of a main part of a functional material laminate having another configuration.

FIG. 4 is a longitudinal sectional view of a main part of a functional material laminate having another configuration.

FIG. 5 is a longitudinal sectional view of a main part of a functional material laminate having another configuration.

FIG. 6 is an explanatory view of a method for producing a functional material laminate according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Functional material laminated body 2 Sealing film 3 Functional material 4 Substrate 5 Adhesive layer 6 Sealing material 7 Holding means 8 Base stand 9 Roll 1A Functional material laminated body 1B Functional material laminated body 1C Functional material laminated body 1D Function Laminate

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F100 AA01B AG00 AJ06 AK01B AK07 AK16A AK16C AT00A AT00C AT00D BA03 BA04 BA06 BA26 CA18B CB00 DA12 DD25 DD32 EA042 EC183 EH46A EH46C EH902 EJ202 J01J02J01 GB01 J01 GB02

Claims (9)

[Claims] 1. A water-soluble polymer compound, a nonionic surfactant and / or an inorganic electrolyte, and water as constituent components between transparent sealing films coated with vinylidene chloride resin or vinylidene chloride resin. A functional material laminate comprising a functional material sealed therein. 2. The functional material laminate according to claim 1, wherein at least one of the sealing films has an adhesive property or has an adhesive layer formed on an outer surface thereof. 3. A water-soluble polymer compound, a nonionic surfactant and / or an inorganic electrolyte, and water between a transparent sealing film coated with vinylidene chloride resin or vinylidene chloride resin, and a substrate. A functional material laminate characterized by encapsulating a functional material which is a component of the above. 4. The functional material laminate according to claim 1, wherein the substrate is fixed to the outer surface of one of the sealing films directly or via an adhesive. 5. The functional material laminate according to claim 1, wherein at least a part or all of the transparent substrate is fixed to the outer surfaces of both sealing films directly or via an adhesive. 6. The functional material laminate according to claim 3, wherein the base is fixed to the outer surface of the sealing film directly or via an adhesive. 7. A water-soluble polymer compound, a nonionic surfactant and / or an inorganic electrolyte, and water as constituents between a transparent sealing film coated with vinylidene chloride resin or vinylidene chloride resin. While supplying a functional material that is, while pressing one sealing film to the other sealing film side in a substantially linear shape by the pressing means, relatively moving the pressing means and the sealing film, between the sealing film A method for producing a functional material laminate in which a surplus functional material is squeezed out and bubbles in the functional material are extruded to the outside and sealed between sealing films. 8. A water-soluble polymer compound, a nonionic surfactant and / or an inorganic electrolyte, and water between a substrate and a transparent sealing film coated with vinylidene chloride resin or vinylidene chloride resin. While supplying the functional material as a constituent component, while pressing the sealing film to the substrate side in a substantially linear shape by the pressing means, the pressing means and the sealing film are relatively moved, and between the sealing film and the substrate. A method for producing a functional material laminate, in which a surplus functional material is squeezed out and bubbles in the functional material are extruded to the outside and sealed between a sealing film and a substrate. 9. The method for producing a functional material laminate according to claim 7, wherein after enclosing the functional material, the substrate is fixed to the outer surface of at least one sealing film directly or via an adhesive.