JP2018065720A - Glass wood material laminate and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass wood material laminate capable of suppressing remaining air bubbles inside regardless moisture content and surface uneven state of a wood material and a manufacturing method therefor.SOLUTION: There is provided a manufacturing method of a glass wood material laminate 10 having a laminate structure in which a glass 11 and a wood material 14 are laminated via an adhesive film 12 and a planarized film 13 for reducing surface uneven of a wood material 14 between the adhesive film 12 and the wood material 14, which includes a process for forming a planarized film 13 on a surface of the wood material 14 and a process for adhering the glass 11 and the wood material 14 having the planarized film 13 formed via the adhesive film 12 so that a side of the planarized film 13 of the wood material 14 is opposed to the glass 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a glass-wood laminate and a method for producing the same.

  Laminated glass in which a pair of glass plates are laminated via an intermediate film has high impact resistance and is not easily damaged, and even if it is damaged, glass fragments do not scatter and are excellent in crime prevention and safety. Therefore, laminated glass is widely used in vehicles such as automobiles, trains, airplanes, and ships; buildings; interiors and the like. Conventionally, polyvinyl butyral (PVB) or ethylene / vinyl acetate copolymer (EVA) is preferably used as a material for the interlayer film from the viewpoint of reliability such as weather resistance and chemical stability. Furthermore, by devising the PVB or EVA material, functions such as ultraviolet cut, infrared cut, and sound insulation can be imparted or colored.

Furthermore, in recent years, glass materials with higher design properties have been demanded in applications such as building materials such as window materials, floor materials, wall materials, and ceiling materials; interior materials such as table tops. For example, in Patent Document 1, a synthetic rubber-like frame piece is disposed along the inner peripheral edge of a pair of glass plates, and a natural shaped object is placed in a transparent synthetic resin filled in the internal space of the frame piece. A laminated glass is proposed in which an intermediate perspective layer in which a pattern body is embedded is interposed (claim 1).
However, the laminated glass described in Patent Document 1 has a large number of steps and is difficult to mass-produce because a frame piece is provided and a resin is poured into the internal space to form an intermediate perspective layer.
Under such background, a laminated glass in which different materials other than glass such as printed PET (polyethylene terephthalate) film, Japanese paper, cloth, metal, marble, veneer, pressed flower, and leaf vein are encapsulated has been proposed. This laminated glass is based on a five-layer structure of glass plate / PVB intermediate film / different material / PVB intermediate film / glass plate, and realizes a design with excellent aesthetics by visually observing the different material through the front glass plate. be able to.

JP-A 63-147845

  Generally, since wood such as a veneer contains moisture, bubbles are likely to be generated when moisture is evaporated from the wood when the PVB film forming the glass and the intermediate film and the wood are bonded together. Since wood also has fine irregularities on the surface, air is likely to remain inside the fine irregularities on the surface of the wood when the PVB film forming the glass and the intermediate film and the wood are bonded together. Therefore, if wood such as a veneer is used as it is without any special treatment, small bubbles are likely to remain inside the glass / PVB interlayer / wood glass laminate. If the wood is used in a state of being dried at high temperature, the generation of bubbles is suppressed, but the wood may be discolored or deteriorated. When the dried wood is not immediately used for the production of laminated glass, a storage environment capable of maintaining a dry state is required. Also, drying alone cannot solve the problem of air remaining inside the surface irregularities of the wood during bonding.

  An object of this invention is to provide the glass-wood laminated body which can suppress that a bubble remains inside, and its manufacturing method irrespective of the moisture content and surface unevenness | corrugation state of wood.

  This invention provides the glass-wood laminated body which has the structure of [1]-[6] below, and its manufacturing method.

[1] A glass-wood laminate in which glass and wood are laminated via an adhesive film,
A glass-wood laminate comprising a planarizing film for reducing surface irregularities of the wood between the adhesive film and the wood.
[2] The glass-wood laminate according to [1], wherein the planarizing film includes a cured product of a curable resin.
[3] The glass-wood laminate according to [1] or [2], wherein the adhesive film includes a thermoplastic resin.
[4] The glass-wood laminate according to [3], wherein the thermoplastic resin is polyvinyl butyral or an ethylene / vinyl acetate copolymer.
[5] The glass laminate according to any one of [1] to [4], wherein the adhesive film and / or the planarizing film further contains a colorant.

[6] A method for producing a glass-wood laminate in which glass and wood are laminated via an adhesive film,
Forming a planarizing film on the surface of the wood;
A step of adhering the glass and the wood on which the planarizing film is formed through the adhesive film so that the planarizing film side of the wood faces the glass. Method.

  The glass-wood laminate of the present invention and the method for producing the same can suppress air bubbles from remaining inside regardless of the moisture content of the wood and the surface roughness.

It is a schematic cross section of the glass-wood laminated body of one Embodiment which concerns on this invention.

Embodiments of the present invention will be described below.
[Glass-wood laminate]
As shown in FIG. 1, a glass-wood laminate 10 according to an embodiment of the present invention has a laminated structure in which glass 11 and wood 14 are laminated via an adhesive film 12, and the adhesive film 12 and the wood 14. The flattening film 13 for reducing the unevenness of the surface of the wood 14 is provided.
The glass-wood laminate 10 can be preferably used for applications such as building materials such as window materials, floor materials, wall materials, and ceiling materials; interior members such as table top plates; and exteriors of white goods such as refrigerators.

A known glass 11 can be used, and examples thereof include soda lime glass, borosilicate glass, and alkali-free glass. The glass 11 may have a surface subjected to known surface treatments such as antireflection (AR) treatment, fingerprint prevention (AFP) treatment, antifouling treatment, and antibacterial treatment. The glass 11 may be subjected to a known secondary processing such as tempering.
The total light transmittance of the glass 11 is preferably 80% or more, more preferably 85% or more, and particularly preferably 90% or more.
The surface roughness (arithmetic average roughness Ra) of the glass 11 is preferably 10 nm or less, more preferably 5 nm or less, and further preferably 2 nm or less.
The transparency and surface roughness of the glass 11 are not limited to the above, and may be subjected to a treatment such as matting.
The thickness of the glass 11 is preferably 0.01 to 20 mm, more preferably 0.05 to 10 mm, and particularly preferably 0.15 to 5 mm.

The material of the adhesive film 12 may be any material as long as the glass 11 and the wood 14 can be bonded together, and a material for an interlayer film of laminated glass can be used, and preferably includes a thermoplastic resin. A well-known thing can be used for a thermoplastic resin, Polyvinyl acetal, such as ethylene-vinyl acetate copolymer (EVA); polyvinyl butyral (PVB), etc. are used preferably. Among these, polyvinyl acetal such as PVB is preferable from the viewpoint of reliability such as weather resistance and chemical stability.
The material of the adhesive film 12 is preferably a thermoplastic resin film. By using a thermoplastic resin film such as a PVB film, the glass 11 and the wood 14 can be easily bonded.

  Examples of the wood 14 include veneer, wood veneer, wood plywood, particle board, and wood fiber board such as MDF (medium density fiber board). From the viewpoint of weight reduction and cost of the glass-wood laminate 10, A veneer or the like is preferable.

Generally, wood such as a veneer contains moisture. When a wood containing moisture is used as it is and a PVB film or the like that forms an adhesive film with glass is bonded to the wood, bubbles are likely to be generated by the evaporation of moisture from the wood. Generally, wood such as a veneer has fine irregularities on the surface, and the larger the irregularities on the surface, the better the aesthetic appearance when viewed through glass. For example, the surface roughness (arithmetic average roughness Ra) of a commercially available veneer is about 10 μm. However, when wood having surface irregularities is used as it is, and a PVB film or the like that forms glass and an adhesive film is bonded to wood, air tends to remain inside the fine irregularities on the surface of the wood. Therefore, if wood such as a veneer is used as it is without any special treatment, small bubbles tend to remain inside the glass / adhesive film / wood glass / wood laminate.
If the wood is used in a state of being dried at a high temperature, the generation of bubbles is suppressed, but the wood may be discolored or deteriorated. When the dried wood is not immediately used for the production of laminated glass, a storage environment capable of maintaining a dry state is required. Also, drying alone cannot solve the problem of air remaining inside the surface irregularities of the wood during bonding.

  In the present embodiment, the planarization film 13 is formed in advance on the surface of the wood 14 on the glass bonding side. The planarizing film 13 can reduce the surface unevenness of the wood 14 and suppress moisture evaporation from the wood 14 during bonding. The surface roughness (arithmetic average roughness Ra) of the planarizing film 13 is preferably 0.1 to 5 μm.

The planarizing film 13 preferably includes a cured product of a curable resin. Examples of the curable resin include an energy ray curable resin such as an ultraviolet curable resin and an electron beam curable resin, a thermosetting resin, a moisture curable resin, a resin that can be dispersed in a liquid and cured by drying, and 2 Liquid mixed type curable resin etc. are mentioned. Among these, an ultraviolet curable resin or the like is preferable.
The form of the material of the planarizing film 13 is preferably liquid. As the liquid curable resin, commercially available curable resins and varnishes suitable for wood can be used. The planarizing film 13 can be formed by applying and curing a curable resin on the surface of the wood 13 on the glass bonding side.
The thickness of the flattening film 13 is designed according to the surface unevenness level of the wood 14, and is preferably 0.1 to 5 μm, more preferably 0.1 to 1 μm, and particularly preferably 0.1 to 0.5 μm.

  The adhesive film 12 and / or the planarizing film 13 can contain a colorant as necessary. When the adhesive film 12 and / or the planarizing film 13 includes a colorant, the glass-wood laminate 10 can exhibit a color in which the original color of the wood 13 and the color of the colorant are combined. By freely combining the colors of the wood 13 and the colorant, the design freedom of the color of the glass-wood laminate 10 is increased, and the color variation can be developed. Coloring agents include pigments, dyes, and combinations thereof.

  Examples of the dye include anthraquinones, azo series, anthrapyridones, perylenes, anthracenes, perinones, indanthrones, quinacridones, xanthenes, thioxanthenes, oxazines, oxazolines, indigoids, thioindigoides Quinophthalones, naphthalimides, cyanines, methines, pyrazolones, lactones, coumarins, bis-benzoxazolylthiophenes, naphthalenetetracarboxylic acids, phthalocyanines, triarylmethanes, aminoketones, bis ( Styryl) biphenyls, azines, rhodamines, derivatives thereof, and combinations thereof.

  The pigment may be an organic pigment or an inorganic pigment. Organic pigments include azo, azomethine, polyazo, phthalocyanine, quinacridone, anthraquinone, indigo, thioindigo, quinophthalone, benzimidazolone, isoindoline, isoindolinone, and diacetate. Examples include acetoallylide. Inorganic pigments include carbon black (CB), titanium oxide, zinc white, zinc oxide, lithopone, iron oxide, aluminum oxide, silicon dioxide, kaolinite, montmorillonite, talc, barium sulfate, calcium carbonate, silica, alumina, cadmium red. , Bengara, molybdenum red, chrome vermilion, molybdate orange, yellow lead, chrome yellow, cadmium yellow, yellow iron oxide, titanium yellow, chromium oxide, pyridian, cobalt green, titanium cobalt green, cobalt chrome green, ultramarine, ultramarine Examples include blue, bitumen, cobalt blue, cerulean blue, manganese violet, cobalt violet, and mica.

  The adhesive film 12 and / or the planarizing film 13 can further contain other optional additives as necessary.

The glass-wood laminated body 10 can contain arbitrary elements other than the above as needed.
For example, a protective material such as Japanese paper and curable resin can be bonded to the back side of the wood 14 as necessary.
In addition, the design can be changed as appropriate without departing from the gist of the present invention.

[Method for producing glass-wood laminate]
An example of manufacturing the glass-wood laminate 10 will be described.

(Process (1))
First, the planarizing film 13 is formed on the surface of the wood 14 on the glass bonding side.
The material of the planarizing film 13 is preferably a liquid curable resin. The planarizing film 13 can be formed by applying and curing a curable resin on the surface of the wood 13 on the glass bonding side. Examples of the coating method include knife coating, die coating, lip coating, roll coating, curtain coating, bar coating, gravure coating, flexo coating, dip coating, spray coating, spin coating, and ink jet printing.

(Process (2))
Next, the glass 11 and the wood 14 on which the planarizing film 13 is formed are bonded (bonded) through the adhesive film 12 so that the planarizing film 13 side of the wood 14 faces the glass 11.
The glass 11 and the thermoplastic resin film such as a PVB film and the wood 14 on which the flattening film 13 is formed are stacked, and the glass 11 and the wood 14 are simply bonded by thermocompression bonding at a temperature at which the thermoplastic resin film is softened. Can be glued to. When a PVB film is used, the heating temperature is preferably about 130 ° C., and the applied pressure is preferably about 1 MPa.
The glass-wood laminated body 10 shown in FIG. 1 can be manufactured as described above.

  When the glass 11 is a surface-treated glass having a known surface treatment such as antireflection (AR) treatment, anti-fingerprint (AFP) treatment, antifouling treatment, and antibacterial treatment on the surface, the timing of the surface treatment is Any timing before or after the bonding may be used.

  As described above, according to the glass-wood laminate 10 and the manufacturing method thereof according to the present embodiment, it is possible to suppress air bubbles from remaining inside regardless of the moisture content of the wood and the surface irregularity state.

  Hereinafter, the present invention will be described based on examples, but the present invention is not limited thereto. Example 11 is an example and Example 21 is a comparative example.

[material]
The abbreviations of the materials used in each example are as follows.
<Glass>
(G1) Float glass plate ("FL5" manufactured by Asahi Glass Co., Ltd., length 10 cm x width 10 cm x thickness 5 mm, surface roughness (arithmetic mean roughness Ra) 0.1 µm),
<Wood>
(W1) Mobbing veneer (made by a board trading company, length 10 cm x width 10 cm x thickness 250 µm, surface roughness (arithmetic mean roughness Ra) 8.9 µm)
<Curable resin>
(R1) UV curable resin (“3051” manufactured by Three Bond Holdings Co., Ltd.)
<Thermoplastic resin film>
(F1) PVB film ("S-LEC CLEAR FILM 15 mil" manufactured by Sekisui Chemical Co., Ltd., length 10 cm x width 10 cm x thickness 0.38 mm)

[Example 11: Production of glass-wood laminate]
An ultraviolet curable resin (R1) was applied to the surface of the veneer (W1) on the glass bonding side, and the glass rod was rolled to spread the coating solution over the entire veneer. Then, it was cured by irradiation with ultraviolet rays ( ² mW / cm ² ) using a chemical lamp manufactured by NEC to form a flattened film (surface roughness (arithmetic average roughness Ra) 0.2 μm).
Next, the glass (G1), the PVB film (F1), and the veneer (W1) on which the above-described flattening film was formed were overlapped so that the flattened film side of the veneer (W1) faced the glass (G1). . Laminate these in a bag made of film, heat the mouth of the bag in a vacuum and seal it to make a vacuum pack, and heat-press it under the condition of 130 ° C. A body (M11) was obtained.

[Example 21: Production of glass-wood laminate]
The same as Example 11 except that the glass (G1), the PVB film (F1), and the veneer (W1) were heat-bonded without forming a flattening film on the glass adhesion side surface of the veneer (W1). A glass-wood laminate (M21) was obtained.

[Evaluation items and evaluation methods]
The following evaluation was implemented about the glass-wood laminated body obtained in each case.
(Average number of bubbles in 1 cm square)
Three test areas of 1 cm square are randomly extracted from the area (8 cm square) excluding the outer peripheral part (range of 1 cm from each side) of the glass-wood laminate (10 cm square), and the number of bubbles in each test area is visually observed. And the average value was obtained. The evaluation criteria are as follows.
○ (Good): 1cm square has an average number of bubbles of 5 or less,
X (Bad): The average number of bubbles per square cm is 6 or more.

[Evaluation results]
Table 1 shows the main production conditions and evaluation results.
In Example 11 in which a glass / wood laminate having a laminated structure of wood / flattening film / adhesion film / glass was produced, the average number of bubbles in a 1 cm square of the glass / wood laminate was 0. On the other hand, in Example 21 in which the planarizing film was not formed, the average number of bubbles in a 1 cm square of the glass-wood laminate was 6 or more.

  The glass-wood laminate of the present invention can be preferably used for applications such as building materials such as window materials, floor materials, wall materials, and ceiling materials; interior members such as table tops; and exteriors of white goods such as refrigerators.

10: Glass-wood laminate, 11: Glass, 12: Adhesive film, 13: Planarization film, 14: Wood

Claims (6)

A glass-wood laminate in which glass and wood are laminated via an adhesive film,
A glass-wood laminate comprising a planarizing film for reducing surface irregularities of the wood between the adhesive film and the wood.   The glass-wood laminate according to claim 1, wherein the planarizing film includes a curable resin.   The glass-wood laminate according to claim 1 or 2, wherein the adhesive film contains a thermoplastic resin.   The glass-wood laminate according to claim 3, wherein the thermoplastic resin is polyvinyl butyral or an ethylene / vinyl acetate copolymer.   The glass laminate according to claim 1, wherein the adhesive film and / or the planarizing film further contains a colorant. A method for producing a glass-wood laminate in which glass and wood are laminated via an adhesive film,
Forming a planarizing film on the surface of the wood;
A step of adhering the glass and the wood on which the planarizing film is formed through the adhesive film so that the planarizing film side of the wood faces the glass. Method.

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