WO2010093023A1

WO2010093023A1 - Laminated glass

Info

Publication number: WO2010093023A1
Application number: PCT/JP2010/052097
Authority: WO
Inventors: 裕二正木
Original assignee: 旭硝子株式会社
Priority date: 2009-02-13
Filing date: 2010-02-12
Publication date: 2010-08-19
Also published as: JP5578085B2; JPWO2010093023A1

Abstract

The object aims to conveniently provide a laminated glass which has no crease on the periphery and good appearance even when an intermediate film comprising a resin film is used therein. Specifically disclosed is a laminated glass (1) which is characterized by comprising at least two glass plates each having a curved surface and an intermediate film sandwiched between the glass plates, wherein the intermediate film comprises a resin film layer and adhesive resin layers laminated on the entire areas of both surfaces of the resin film layer, the resin film layer has a plurality of lost parts (41) on the periphery thereof, and the shape of the generating line of the resin film layer and the shape of each of the outer peripheral lines of the adhesive resin layers are approximately identical to each other.

Description

Laminated glass

The present invention relates to laminated glass, an intermediate film for producing laminated glass, an intermediate film roll body, and a glass laminate.

Recent vehicle window glass, especially automobile windshields, have a structure in which a plurality of glass plates are sandwiched between resin films such as polyvinyl acetal such as polyvinyl butyral and ethylene-vinyl acetate copolymer. Laminated glass is often used. These resin films are easily bonded to a glass plate by heating and pressurization to form a resin layer that bonds two glass plates of laminated glass together. On the other hand, the window glass for vehicles has more curved glass which has a curved surface than flat glass. In many cases, curved glass that is curved three-dimensionally, such as a windshield of an automobile, is often used instead of a simple curved glass that is curved only in one direction. Furthermore, the vehicle window glass is often provided with functional members having various functions. For example, heat ray reflective glass that blocks transmission of infrared rays, antifogging glass with an antifogging function, and laminated glass with an antenna wire or heating wire are known.

As means for imparting functions such as heat ray reflection to laminated glass, means for adding members having these functions to an interlayer film is known. Specifically, it is conceivable to laminate a thin film having a heat ray reflecting function on the intermediate film, but a resin film such as polyvinyl acetal is easily softened at a relatively low temperature, and thus has a heat ray reflecting function. It is difficult to directly stack thin films.

Therefore, an intermediate film 8 sandwiched between two

glass plates

2 and 3 as shown in the partial sectional view of FIG. 9 has been developed. The intermediate film 8 has a resin film layer 4 such as polyethylene terephthalate (PET) resin having heat resistance and high shape stability as a support film, and a thin film having a function such as heat ray reflection is laminated on the support film (not shown). The intermediate film is formed by laminating

adhesive resin layers

5 and 6 such as polyvinyl acetal resin on both surfaces. In addition, it is good also as an intermediate film which uses the resin film layer which has functions, such as a heat ray reflection, as a support film, and laminated | stacked the

adhesive resin layers

5 and 6 on these both surfaces. Since this intermediate film 8 has a function such as heat ray reflection and has a polyvinyl acetal film having high adhesion to a glass plate on the surface, it is a suitable intermediate film for laminated glass. Reference numeral 7 denotes an opaque band at the peripheral edge often provided in the case of a vehicle window glass, and is usually a black ceramic layer.

However, a planar intermediate film having a curved glass plate that is three-dimensionally curved like the above-described window glass for a vehicle and a resin film having high shape stability (that is, low stretchability) such as PET is pasted. When matching, there are the following problems. Since this intermediate film has a resin film, the expansion and contraction is limited, and thus there is a possibility that wrinkles may occur when the interlayer film is adhered and laminated on a curved glass plate that is curved three-dimensionally. And this wrinkle tends to become remarkable in the peripheral part of a curved-surface glass plate. And when wrinkles occur, there is a risk of affecting the field of view or the appearance of the product.

Therefore, curved laminated glass that suppresses generation of wrinkles and a method for manufacturing the same have been proposed. For example, Patent Document 1 discloses a transparent curved laminated glass that prevents wrinkles during the production of laminated glass. In this curved laminated glass, as shown in the partial sectional view of FIG. 10, the intermediate film 8 sandwiched between the

glass plates

2 and 3 on both sides is a support film (resin film layer) having a thin film layer (not shown). It has a multilayer structure in which external adhesive layers (adhesive resin layers 5 and 6) are laminated on both sides of 4). Further, the peripheral edge of the curved laminated glass 1 has a peripheral band 7 made of an opaque material. The support film (resin film layer 4) is cut from the end portion at a width C that is narrower than the width of the peripheral band 7. In the curved laminated glass, there are many curved portions having a large curvature at the peripheral portion, and it is said that generation of wrinkles can be sufficiently suppressed by cutting the support film at the peripheral portion. Further, in this vehicle window glass, since the support film is cut with a width narrower than that of the peripheral band 7, the cut end is covered with the peripheral band 7, and is not substantially visible and does not cause a visual hindrance. .

Patent Document 2 discloses a manufacturing apparatus and a manufacturing method for manufacturing laminated glass in which generation of wrinkles is suppressed. This laminated glass manufacturing apparatus and manufacturing method are an apparatus and a method in which the end of the laminated interlayer film is held down, placed on a glass plate, and crimped while being tensioned so as not to cause wrinkles.

JP 2000-247691 A Japanese Patent Laid-Open No. 06-321589

In the laminated glass disclosed in Patent Document 1, in the peripheral part where wrinkles are likely to occur, a support film such as PET having low stretchability is cut and removed, and only the polyvinyl butyral (PVB) resin layer having high stretchability is removed. To solve the problem. For example, it is disclosed that in a pre-laminated body composed of a PVB adhesive film and a support film, a desired position of the support film is cut with a specific device without cutting the PVB film. In addition, in the three-layer pre-laminated body composed of the upper PVB film, the support film, and the lower PVB film, only the upper PVB film and the support film are cut, or a desired apparatus is cut into a desired position of the support film. Later, a method of pulling out the support membrane is also disclosed. The process of cutting the peripheral portion of the pre-laminated film in advance is troublesome, and there is a problem that it takes time to position the peripheral band, and a simpler method has been desired.

In the laminated glass manufacturing apparatus and manufacturing method described in Patent Document 2, a laminated glass that has a small curvature and is not so curved, a laminated glass that is curved only in one direction, or has high stretchability. This is effective in the production of laminated glass using an interlayer film. However, when producing laminated glass that is curved three-dimensionally using a support film with relatively poor stretchability, such as PET, laminated with a functional film such as a heat ray reflective film, generation of wrinkles There is a limit to restraining it.

In the present invention, based on the above-described problems, a laminated glass and a glass laminate having a good appearance with no wrinkles observed at the periphery using an intermediate film having a resin film, and an intermediate film suitable for producing the laminated glass And it aims at provision of an intermediate film roll body.

As a result of intensive studies to solve the above problems, the present inventors have found that the above problems can be solved by the following means, and have completed the present invention.

The present invention is a laminated glass obtained by sandwiching an intermediate film comprising a resin film layer and an adhesive resin layer laminated on both surfaces of the resin film layer between at least two curved glass plates. The resin film layer is a laminated glass characterized in that a peripheral portion has a plurality of deficient portions, and a bus bar of the resin film layer and an outer peripheral line of the adhesive resin layer have substantially the same shape.
The present invention is a laminated glass obtained by sandwiching and pressing an intermediate film comprising a resin film layer and an adhesive resin layer laminated on both surfaces of the resin film layer between at least two curved glass plates. The resin film layer is a laminated glass characterized in that the resin film layer has a plurality of deficient portions in a peripheral portion, and the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer have substantially the same shape. .

Preferably, in the laminated glass, the plurality of deficient portions are formed in a band-like region at a peripheral portion of the resin film layer.

Preferably, in the laminated glass, the plurality of deficient portions are formed over the entire periphery of the resin film layer.

Preferably, in the laminated glass, the peripheral edge portion is in the range of 10 to 300 mm from the outer peripheral edge of the resin film layer.

Preferably, the plurality of deficient portions are notches having at least one shape selected from the group consisting of a circle, a triangle, a quadrangle, a pentagon, a hexagon, an ellipse, an oval, a sawtooth pattern, a corrugated pattern, and an uneven pattern. It is the said laminated glass characterized by these.

Preferably, in the laminated glass, the plurality of deficient portions in the resin film layer are arranged substantially uniformly at a peripheral portion.

Preferably, in the laminated glass, the region of the resin film layer in which the plurality of defective portions are formed has an opening ratio of the defective portions that decreases toward the center.

Preferably, in the laminated glass, the opening ratio of the defect portion in the region where the defect portion of the peripheral portion of the resin film layer is formed is 30 to 99%.

Preferably, the laminated glass is characterized in that a functional thin film is provided on at least one surface of the resin film layer.

The present invention is a glass plate having one curved surface, an adhesive resin layer, a resin film layer having a plurality of deficient portions on the peripheral edge, an adhesive resin layer, and a glass plate having another curved surface, It is a laminated glass formed by laminating and pressing in this order.
The present invention is a laminated glass obtained by sandwiching and pressing an intermediate film comprising a resin film layer and an adhesive resin layer laminated on both surfaces of the resin film layer between at least two curved glass plates. The resin film layer has a plurality of deficient portions at a peripheral portion, and the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer have substantially the same shape, It is glass.
The present invention is an intermediate film for producing any one of the laminated glasses, and the intermediate film includes a resin film layer and an adhesive resin layer laminated on both surfaces of the resin film layer. The resin film layer is an intermediate film characterized in that it has a plurality of deficits at the peripheral edge, and the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer have substantially the same shape.

In the present invention, a plurality of single-layer or multi-layer resin films, which are cut into a predetermined shape in advance and have a plurality of deficient portions formed at the periphery, are enclosed between two long adhesive resin sheets. In addition, the present invention is a roll of a long intermediate film characterized by winding up the long body for manufacturing an intermediate film.

The present invention provides a laminated film comprising a resin film layer and an adhesive resin layer laminated on at least one whole surface of the resin film layer on a glass plate having a curved surface so that the adhesive resin layer is on the glass plate side. The resin film layer has a plurality of deficient portions at a peripheral portion, and the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer are substantially in the same shape. It is a glass laminate characterized by being.

ADVANTAGE OF THE INVENTION According to this invention, the intermediate film which has a resin film is used, a laminated glass with a favorable external appearance without a flaw observed in a peripheral part, a glass laminated body, an intermediate film suitable for manufacture of the said laminated glass, and an intermediate film roll The body can be provided by a simple method.

Partial sectional view of the laminated glass of the present invention Plan view of the interlayer film (1) of the present invention Plan view of the interlayer film (2) of the present invention Opening shape and arrangement example (1) Opening shape and arrangement example (2) Opening shape and arrangement example (3) Shape and arrangement of openings (4) Shape and arrangement of openings (5) Partial sectional view of conventional laminated glass (1) Partial sectional view of conventional laminated glass (2)

The present invention will be described with reference to the following specific embodiments with reference to the drawings. The present invention is not limited to these embodiments and examples, and these embodiments and examples can be changed or modified without departing from the spirit and scope of the present invention.

The laminated glass of the present invention is suitably used for laminated glass having a curved surface for vehicle windows. FIG. 1 is a partial cross-sectional view of the laminated glass of the present invention. In the laminated glass 1, an intermediate film 8 is interposed between the upper and

lower glass plates

2 and 3. The intermediate film 8 includes a resin film layer 4 and

adhesive resin layers

5 and 6 laminated on both sides of the resin film layer 4. And the peripheral part of the resin film layer 4 corresponding to the peripheral part of the laminated glass 1 has a plurality of defect parts 9 from which the resin film has been removed, and the adhesive resin of the

adhesive resin layers

5 and 6 enters the defect part 9. is doing. In addition, since this laminated glass 1 assumes the laminated glass for vehicle windows, it has the opaque band 7 in the peripheral part. The missing portion 9 is formed in a region narrower than the width of the opaque band 7 (region of width m from the end in FIG. 1).

The intermediate film of the present invention includes a resin film layer and an adhesive resin layer laminated on the entire surface of both of the resin film layers. And the said resin film layer has a some defect | deletion part in a peripheral part, and the bus line of the said resin film layer and the outer peripheral line of the said adhesive resin layer are substantially the same shape.

The opening may be an opening formed in the resin film layer, may be a cut from the end of the resin film layer toward the inside, or these openings and cuts may be mixed.

Examples of the intermediate film of the present invention are shown in the plan views of FIGS. 2 and 3, the solid line surrounding the periphery of the intermediate film 8 is a line (peripheral line) representing the outer periphery of the adhesive resin layer. In the present invention, the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer have substantially the same shape. The “bus line of the resin film layer” means a line indicating the outer periphery of the resin film layer before the defective portion is formed (in other words, a virtual outer peripheral line of the resin film layer when there is no defective portion). . That is, in the present invention, the resin film layer and the adhesive resin layer before the defect portion is formed have substantially the same shape.

In the example of the intermediate film 8 shown in FIG. 2, the defect portion 41 of the resin film 4 is a substantially square opening, and there are a plurality of openings on the peripheral edge of the resin film (in addition, at the outer peripheral edge of the resin film 4, The opening 41 has a notch shape, which is also regarded as a part of the opening). The region where the opening 41 is formed is the entire peripheral portion of the resin film, and the width m of the region is preferably narrower than the width of the opaque band 7 when a laminated glass for vehicle windows is assumed.

In the example of the intermediate film 8 shown in FIG. 3, the missing part 42 of the resin film has a plurality of triangular cutouts continuous to the entire outer peripheral edge of the resin film, forming a sawtooth pattern. The width of the sawtooth pattern is preferably about m narrower than the width of the opaque band 7.

As described above, when the defect portion is provided in the peripheral portion of the resin film constituting the intermediate film, the resin film is less likely to be wrinkled even if it is laminated with the curved glass plate. As in the case of manufacturing laminated glass for vehicle windows, it is possible to prevent wrinkles from being generated on the resin film when laminating with a glass plate having a large degree of curvature, in particular, a degree of curvature of the peripheral edge is remarkable. That is, it is effective in suppressing the generation of wrinkles when manufacturing a curved laminated glass having a structure in which wrinkles are likely to occur at the peripheral portion.

This is because the resin film layer is provided with the defect portion, so that the deformation is facilitated and the curved surface is easily followed. Further, in the pressure bonding process of the laminated glass manufacturing process (described later), the adhesive resin layer is softened by being heated and enters a defect portion of the resin film layer. And since the adhesive resin layer cooled in the subsequent process has sufficient rigidity to hold the deformation of the resin film layer bent along the curved surface, the intermediate film of the present invention comprises a glass plate having a curved surface. It is considered effective for laminating.

The

adhesive resin layers

5 and 6 are also formed at locations corresponding to the

defect portions

41 and 42 of the resin film layer 4. If the

adhesive resin layers

5 and 6 are formed on the

defect portions

41 and 42 of the resin film layer 4, the resin film layer 4 is formed on the

defect portions

41 and 42 when the intermediate film 8 is laminated with the

glass plates

2 and 3. It is easy to be firmly fixed by the formed

adhesive resin layers

5 and 6. For this reason, even when moisture or the like enters the resin film layer 4 during use as a laminated glass, the adhesive resin that has entered the

defect portions

41 and 42 has an effect of preventing the resin film layer 4 from being peeled off.

In addition, in the present invention, since the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer have substantially the same shape, the alignment of the resin film layer and the adhesive resin layer is simple when manufacturing the intermediate film. There is also an advantage to become.

In the laminated glass for a windshield of a passenger car or the like, the

defect portions

41 and 42 are preferably formed on the entire peripheral portion of the resin film so as to be disposed on the entire peripheral portion of the laminated glass. However, depending on the shape of the laminated glass plate, the peripheral portion of the resin film layer 4 that is easily wrinkled may become a part. In such a case, it is only necessary to provide the

defect portions

41 and 42 in the band-like region only in the peripheral portion where the wrinkles are easily formed.

The width m of the region where the

defect portions

41 and 42 are provided in the peripheral portion may be determined in consideration of the shape of the laminated glass plate and the stretchability of the resin film layer 4, but from the outer peripheral edge of the resin film toward the inner periphery. The width is preferably 10 to 300 mm, more preferably 30 to 200 mm. In the case where an interlayer film is used for a laminated glass for a windshield of a passenger car, it is preferable that a region where the

defect portions

41 and 42 are formed is a region overlapping with the opaque band 7. This is because a laminated glass having a better appearance can be obtained.

Here, the opaque band 7 may be a completely opaque region. In addition, a first concealment region, which is a completely opaque region, is disposed on the peripheral edge of the glass plate, and a second concealment region having a smaller concealment ratio than the first concealment region is provided on the inner side (side closer to the center). The opaque band 7 may be provided. In the latter case, gradation may be applied between the first concealment region and the second concealment region, and the concealment ratio may gradually change.

The shape and arrangement of the defect portion may be selected optimally depending on the shape of the laminated glass plate, that is, the curvature, the bending position, and the three-dimensional bending state. As an example of the shape and arrangement of the defect portion, there is a defect portion such as a checkered pattern or a square staggered arrangement as shown in FIG. As a modification, there is a shape or arrangement in which a circular opening is used instead of a square opening. Moreover, the defect | deletion part which formed the notch of the sawtooth pattern which is a triangle which continued at the edge part as shown in FIG. 3 may be sufficient.

In general, the shape of each missing portion may be any shape, and as long as it is an opening, such as a circle, a triangle, a rectangle, a pentagon, a hexagon, an ellipse, or an oval, an outline of a chrysanthemum crest, an outline of a cherry blossom crest, etc. Shape. If it is a notch, a sawtooth pattern, a corrugated pattern, an uneven pattern, etc. are mentioned.
In the present invention, a plurality of defect portions are provided at the peripheral end portion of the resin film. However, the defect portions may be the same shape or may be combined with different shape defect portions.

Specific examples of the shape and arrangement of the defect portions are shown in FIGS. FIG. 4 is a partial explanatory view of an example in which circular openings are regularly arranged. 4A is an example in which circular openings 43 are arranged in a staggered manner of 60 degrees (finely packed arrangement), and FIG. 4B is an example in which circular openings 43 are arranged in a staggered form of 90 degrees, and FIG. c) is an example in which circular openings 43 are arranged in parallel. When the interval between the openings is P and the diameter of the openings is D, the opening ratio (%) is 90.6 × D ² / P ^{2 for} the 60 ° staggered arrangement and 157 × D ² / P for the 90 ° staggered arrangement. ² and the parallel arrangement is 78.5 × D ² / P ² . In the case of a circular opening, it can be said that the 90-degree staggered arrangement and the parallel arrangement are the same if the arrangement is inclined 45 degrees.

FIG. 5A shows an example in which square openings 44 are staggered by 60 degrees, and FIG. 4B shows an example in which square openings 44 are arranged in parallel. The spacing of the respective apertures When the P, the length of the square side was as D, opening ratio (%) is 60 ° staggered arrangement 100 × ^D ² / ^P 2, arranged in parallel even 100 × ^D ² / ^P 2 It becomes.

In addition to the above, there are various examples of shapes and arrangements. For example, FIG. 6A shows an example in which oblong (oval) openings 45 are arranged in a staggered manner, and FIG. This is an example in which (oval-shaped) openings 45 are arranged in parallel. When the horizontal interval of each opening is L2, the vertical interval is S, the oval horizontal length is L1, and the vertical length is W, the aperture ratio (%) is the staggered arrangement and the parallel arrangement { It is represented by (2WL1-0.43W ² ) / 2SL2} × 100.

FIG. 7 is an example of a rhombus mesh pattern opening, and the aperture ratio can be greatly increased as shown in FIG. 7 (a). The aperture ratio can be calculated from the rhomboid width LWD, rhombus height SWD, and rhombus partition wall width W shown in FIG. 7B. Similarly, an example of a continuous (turtle shell pattern) arrangement of hexagonal openings as shown in FIG. 8 can be given. Also in this case, the aperture ratio can be calculated from the width LWD and height SWD of the unit pattern and the width W of the partition wall. The opening ratio of the sawtooth pattern or corrugated pattern notch can be easily calculated from the area ratio of FIG. 3, for example.

Note that these openings and notches may be formed by any method. For example, it can be easily formed on a resin film by a punching method or a laser processing method.

In order to improve the visibility of the part where the defect part is formed, it is preferable that each defect part is relatively small and is disposed substantially uniformly at the peripheral edge of the resin film layer. Further, even when the shape of the defect portion and the density at which the defect portion is arranged change, it is preferable that the defect portion is gradually changed in the defect portion formation region (in the peripheral portion). In particular, it is preferable that the opening ratio is gradually changed so that the opening ratio is higher toward the end of the resin film and lower as the distance from the center is closer.

In the present invention, when an interlayer film having a resin film is laminated on a curved glass plate, the presence of the defect portion makes it difficult for wrinkles to occur. This is because the shape of the defective portion is deformed by the presence of the portion, and the generation of wrinkles in the resin film layer is suppressed. The portion where the resin film layer (referred to as a wall) exists between the defect portion and the defect portion is subjected to stress only at the wall portion in order to contact the curved surface of the curved glass plate, Compared to a resin film layer having no defect, it receives a large amount of stress commensurate with the amount of the defect portion, so that large elongation is likely to occur and generation of wrinkles is suppressed. In addition, when wrinkles occur in the wall portion, the wrinkles do not extend any further because of the missing portions. For this reason, even if wrinkles occur, the generated wrinkles are short and difficult to see.

The opening ratio of the defect portion in the entire defect portion formation region of the resin film is 30 to 99%, preferably 50 to 95%. If the opening ratio of the defect portion is less than 30%, the effect of the defect portion is small and wrinkles may occur. If it exceeds 99%, the region of the resin film layer at the peripheral portion becomes less than 1%, and the resin film layer The area of the functional thin film or the like laminated on the film is also less than 1%, and the function of the thin film can hardly be exhibited. It should be noted that the opening ratio of the defect portion in the entire defect portion formation region at the peripheral portion is determined by the opening portion of the defect portion in the entire region (periphery portion) where the defect portion is formed (the resin film layer is defective due to the opening or notch). Ratio).

On the other hand, it is preferable that the opening portions of the plurality of defective portions (portions where the resin film layer is defective due to openings or notches) are arranged such that the opening ratio decreases toward the center portion. Here, the aperture ratio is a ratio of an opening portion in an area having a predetermined area in an area where a defect portion is formed. By doing in this way, it becomes easy to suppress generation | occurrence | production of the wrinkles around the outermost periphery part in which wrinkles generate | occur | produce most easily. In calculating the aperture ratio, it is preferable to target a region having a size that includes a plurality of missing portions as a predetermined size.

In the present invention, a functional thin film may be provided on at least one surface of the resin film. Such a thin film may be, for example, an infrared reflecting film, an ultraviolet absorbing film, a visible light transmission suppressing film, a conductive thin film, or a radio wave transmitting / receiving thin film. In addition, thin films having various functions may be stacked. The thin film may be laminated on both surfaces of the resin film. In this case, the thin films stacked on the respective surfaces may be the same film or different films. Furthermore, one surface of the resin film may be divided and two or more kinds of thin films may be laminated, or the thin film may be partially formed instead of the entire surface.

The functional thin film may be laminated on the resin film layer by any method, but in addition to normal thin film lamination, coating, printing, etc., vacuum deposition, thermal deposition, chemical vapor deposition (CVD), sputtering A thin film may be formed on the surface of the resin film layer by ion plating or the like.

The infrared reflection film is a known thin film having a function of selectively controlling the transmittance of light rays and heat rays, such as gold, silver, copper, platinum, aluminum, nickel, palladium, indium, tin, chromium, zinc, etc. Metals, alloys or mixtures based on these metals, and metal oxides such as tin-doped indium oxide (ITO), indium oxide, tin oxide, silicon oxide, aluminum oxide, zinc oxide, and tungsten oxide, and these metals A compound or mixture containing an oxide as a main component, and a thin film in which two or more of these metals or metal oxides are laminated can be used, and these can be appropriately selected and used. Usually, when a thin film is formed of a metal, the thickness is preferably 5 to 50 nm, and in the case of a metal oxide, it is preferably 10 to 500 nm.

Various plastic sheets and films can be used as the resin film layer, but they have heat resistance that can withstand the temperature (about 110 to 150 ° C) when a thin film is formed on the surface or laminated glass is produced. Is preferred. Specific examples of the material for the resin film layer include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyester such as polyethylene naphthalate, polyolefin such as polypropylene (PO), polyvinyl chloride (PVC), polyurethane (PU ), Polycarbonate (PC), polyamide, polyimide, polyethersulfone, polyetheretherketone, fluororesin, polystyrene, polymethyl methacrylate, polybutene, polybutadiene, polymethylpentene, ethylene (meth) acrylic acid copolymer, Various synthetic resins such as an ethylene (meth) acrylic acid ester copolymer and an ABS resin can be used, and can be appropriately selected and used.

As the resin film layer, a film made of polyethylene terephthalate (PET) or polypropylene (PP) is preferable because it has high strength and is inexpensive. The resin film layer may be a single layer or a multilayer of two or more layers of the same or different types. The thickness of the resin film layer is preferably 0.5 to 500 μm in view of processability.

As the adhesive resin layer, for example, a known adhesive resin such as polyvinyl acetal resin such as polyvinyl butyral resin (PVB), ethylene-vinyl acetate copolymer can be appropriately selected and used. Usually, the thickness of the adhesive resin layer may be 0.05 to 1.0 mm. Polyvinyl acetal resin including polyvinyl butyral resin is excellent in adhesiveness with a glass plate in addition to adhesiveness with a resin film layer. Moreover, since a polyvinyl acetal resin will be in a softened state at comparatively low temperature and exhibits adhesiveness, it can adhere | attach easily with a glass plate in the crimping | compression-bonding process of a laminated glass manufacturing process.

The glass plate used in the present invention is not particularly limited, and a glass plate used for a vehicle such as an automobile or a window glass of a building is appropriately selected and used according to the application. Further, not only a narrowly defined glass plate made of an inorganic material but also a so-called organic glass plate made of plastic (a broadly defined glass plate including organic glass) may be used. Examples of the plastic glass plate include a plate made of a resin such as polycarbonate, polypropylene, or polystyrene, an acrylic resin, a methacrylic resin, or the like.

A method for producing a laminated glass using the interlayer film of the present invention will be briefly described. In the glass plate forming step, the two glass base plates are cut separately and manufactured by a chamfering step or a clean drying step. Of the two glass base plates, a glass base plate (inner plate) that constitutes the glass plate on the inside of the vehicle is printed with a black ceramic border print on the periphery. This print may be provided on the periphery of the glass base plate (outer plate) outside the vehicle, or may be provided on both the inner plate side and the outer plate side. Thereafter, the glass base plate is placed on a frame having a frame-like edge. Next, the glass base plate is heated to a temperature equal to or higher than the softening point, and is bent into a curved shape by its own weight. Thereafter, it is gradually cooled. Next, the glass base plate moves to a laminating process through a cleaning / drying process.

In the production process of the intermediate film of the present invention, a resin film layer obtained by laminating an infrared reflective film on a polyethylene terephthalate (PET) film having a thickness of 100 μm was used. This resin film layer is cut to be slightly larger than the same shape as the glass base plate, and a square opening having a side of 5 mm as shown in FIG. The aperture ratio in the band-like region where the aperture was formed was about 50%. An adhesive resin layer made of polyvinyl butyral resin (PVB) is laminated on both surfaces of the resin film layer in which the opening is formed. The thickness of each adhesive resin layer was approximately 380 μm. Thus, the intermediate film which laminated the infrared reflective film on the resin film and the polyvinyl butyral resin layer on both surfaces was produced.

In the laminated glass manufacturing process, the two glass plates that have been curved and the intermediate film produced as described above are bonded together. First, the intermediate film and the outer glass plate are laminated in this order on the surface of the inner glass plate opposite to the opaque band. Next, after the laminated glass plate, intermediate film and glass plate are preliminarily pressure-bonded, a main pressure-bonding process is performed using an autoclave (pressure cooker). As a result, the adhesive surface between the two glass plates and the interlayer film is completely degassed and fused to form a laminated glass. Finally, the laminated glass is completed by cutting off the intermediate film protruding from between the laminated glasses.

In the above-described intermediate film manufacturing step, the intermediate film is manufactured by laminating a resin film layer and an adhesive resin layer that have been cut into a predetermined size in advance, but the present invention is not limited to this. For example, an intermediate film manufacturing length in which one or a plurality of resin films, which are cut into a predetermined shape in advance and formed with a plurality of defects at the periphery, are enclosed between two long adhesive resin sheets. You may manufacture by producing a scale and cutting out an intermediate film from this long body for intermediate film manufacture. As the adhesive resin sheet, the same material as the adhesive resin layer can be adopted. In addition, such a long body for producing an intermediate film normally circulates as a roll body wound in the longitudinal direction.

As another method, lamination may be performed so as to have a configuration of [inner glass plate / adhesive resin layer / resin film layer / adhesive resin layer / outer glass plate], pre-compression bonding, and then main compression treatment.

As described above, if there is no opening at the peripheral edge of the intermediate film, the resin film layer is easily wrinkled. However, in this laminated glass manufacturing process, the opening formed in the resin film layer is distorted, so that the resin film layer The occurrence of wrinkles can be suppressed.

As mentioned above, although demonstrated taking the laminated glass as an example, the meaning and range of this invention are not restricted to a laminated glass. Specifically, a configuration like a glass laminate in which a laminated film comprising a resin film layer and an adhesive resin layer laminated on at least one whole surface of the resin film layer is laminated on a glass plate having a curved surface. It can also be applied to. In this laminated film, the resin film layer has a plurality of deficient portions in the peripheral portion, and the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer have substantially the same shape.
In the manufacturing process of the laminated film of the glass laminate according to the present invention of the type described above, a resin film layer in which an infrared reflecting film is laminated on a polyethylene terephthalate (PET) film having a thickness of 100 μm was used. This resin film layer is cut to be slightly larger than the same shape as the glass base plate, and a square opening having a side of 5 mm as shown in FIG. The aperture ratio in the band-like region where the aperture was formed was about 50%. An adhesive resin layer made of polyvinyl butyral resin (PVB) is laminated on the side of the resin film layer in which the opening is formed on which the infrared reflective film is laminated. The thickness of the adhesive resin layer was about 760 μm. Thus, the laminated film which laminated | stacked the infrared reflecting film and the polyvinyl butyral resin layer on the resin film was produced.
In the manufacturing process of a laminated body having a glass plate / adhesive resin layer / resin film layer structure, the laminated film produced as described above is attached to the concave side of one glass plate that has been curved. Match. First, a laminated film is laminated so that the adhesive resin layer is in contact with the surface of the opaque band of the glass plate, and then a glass plate having the same shape as the glass plate is laminated on the concave surface side. Thereafter, the laminated glass plate, the laminated film, and the glass plate are preliminarily pressure-bonded and then subjected to a main pressure bonding process using an autoclave (pressure cooker). Thereafter, the glass plate on the concave surface side is removed, and as a result, the adhesive surface between the glass plate and the laminated film is completely degassed and fused to form a glass plate / adhesive resin layer / resin film layer structure. Finally, the glass laminate is completed by cutting off the adhesive resin layer and the resin film layer protruding from the glass plate.

When the laminated film has such a configuration, the laminated film easily follows the curved surface of the glass plate as described for the laminated glass. Therefore, generation | occurrence | production of a wrinkle can be suppressed in the peripheral part of a glass laminated body, and a laminated glass with a favorable external appearance can be manufactured simply.

According to the present invention, it is possible to prevent generation of wrinkles at the peripheral edge of the curved laminated glass into which the resin film having the functional thin film is inserted, and to provide a laminated glass having a good appearance. It can be suitably used as laminated glass for vehicle windows such as windshield windows of automobiles and other vehicles.
The entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2009-031577 filed on Feb. 13, 2009 are incorporated herein as the disclosure of the present invention. .

1: Laminated glass 2: Glass plate (upper side)
3: Glass plate (lower side)
4: Resin film layer 5: Adhesive resin layer 6: Adhesive resin layer 7: Opaque band 8: Intermediate film 9:

Defects

41, 43, 44, 45: Openings (defects)
42: Notch (defect)

Claims

A laminated glass comprising an interlayer film comprising a resin film layer and an adhesive resin layer laminated on both surfaces of the resin film layer between at least two curved glass plates,
The laminated glass, wherein the resin film layer has a plurality of deficient portions at a peripheral portion, and a bus bar of the resin film layer and an outer peripheral line of the adhesive resin layer have substantially the same shape.
Between the glass plates having at least two curved surfaces, a laminated glass formed by sandwiching and pressing an intermediate film comprising a resin film layer and an adhesive resin layer laminated on the entire surface of both of the resin film layers,
2. The alignment according to claim 1, wherein the resin film layer has a plurality of deficient portions at a peripheral portion, and a bus bar of the resin film layer and an outer peripheral line of the adhesive resin layer have substantially the same shape. Glass.
The laminated glass according to claim 1 or 2, wherein the plurality of deficient portions are formed in a band-shaped region at a peripheral portion of the resin film layer.
The laminated glass according to any one of claims 1 to 3, wherein the plurality of deficient portions are formed over the entire periphery of the resin film layer.
The laminated glass according to any one of claims 1 to 4, wherein the peripheral portion is in a range of 10 to 300 mm from an outer peripheral end portion of the resin film layer.
The plurality of deficient portions are cutouts of at least one shape selected from the group of a circle, a triangle, a quadrangle, a pentagon, a hexagon, an ellipse, an oval, a sawtooth pattern, a corrugated pattern, and an uneven pattern. The laminated glass according to any one of claims 1 to 5.
The laminated glass according to any one of claims 1 to 6, wherein the plurality of deficient portions in the resin film layer are arranged substantially uniformly at a peripheral portion.
The area of the resin film layer in which the plurality of defect portions are formed has an opening ratio of the defect portions that decreases toward the center portion. Laminated glass.
The alignment according to any one of claims 1 to 8, wherein an opening ratio of the defect portion in a region where the defect portion of the peripheral portion of the resin film layer is formed is 30 to 99%. Glass.
The laminated glass according to any one of claims 1 to 9, wherein a functional thin film is provided on at least one surface of the resin film layer.
A glass plate having one curved surface, an adhesive resin layer, a resin film layer having a plurality of deficient portions at the peripheral edge, an adhesive resin layer, and another glass plate having a curved surface are laminated in this order. Laminated glass made by pressure bonding.
The laminated glass for vehicle windows according to any one of claims 1 to 11.
The intermediate film for producing the laminated glass according to any one of claims 1 to 10, wherein the intermediate film is an adhesive resin laminated on both surfaces of the resin film layer and the resin film layer. An intermediate film, wherein the resin film layer has a plurality of deficient portions at a peripheral edge, and the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer have substantially the same shape. .
Production of an intermediate film in which a plurality of single-layer or multi-layer resin films that are cut in a predetermined shape in advance and have a plurality of defective portions formed in the peripheral portion are encapsulated between two long adhesive resin sheets The roll body of an intermediate film elongated body for producing the interlayer film of laminated glass according to any one of claims 1 to 10, wherein the long body for use is wound up.
A laminated film comprising a resin film layer and an adhesive resin layer laminated on at least one whole surface of the resin film layer is laminated on a glass plate having a curved surface so that the adhesive resin layer is on the glass plate side. The resin film layer is characterized in that the resin film layer has a plurality of deficient portions in a peripheral portion, and the bus line of the resin film layer and the outer peripheral line of the adhesive resin layer are substantially the same shape. A glass laminate.