JP2015104845A - Method for manufacturing composite plate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a thin plate glass included in a laminate from being damaged in a manufacturing process of a composite plate material.SOLUTION: A laminate 1 formed by laminating thin plate glasses 8 on the front and back surfaces of a resin plate 6 through adhesive sheets 7 is sandwiched between a pair of pressing plates 2 and stored inside a bag body 3. Low friction sheets 9 having non-adhesiveness are disposed between the front and back surfaces of the laminate 1 and the pressing plates 2 so as to project from the thin plate glasses 8 forming the front and back surfaces of the laminate 1. In such a state, after the inside of the bag body 3 is made negative pressure, heating is performed to melt the adhesive sheets 7 of the laminate 1 to bond the resin plate 6 to the thin plate glasses 8.

Description

  The present invention relates to a method for producing a composite plate material obtained by laminating and integrating plate materials containing thin glass.

  As a composite plate material using plate glass, laminated glass in which two plate glasses are laminated and integrated through an adhesive layer is widely used.

  As a method for producing this type of laminated glass, for example, the method disclosed in Patent Document 1 can be mentioned. That is, a laminated body formed by laminating two sheet glasses via an adhesive sheet (intermediate film) is accommodated in a bag (rubber bag) in a state of being sandwiched between a pair of rigid plates. In this state, the bag body is heated while maintaining a negative pressure to melt the adhesive sheet in the laminate while deaeration, thereby bonding the two plate glasses. At this time, since the pair of rigid plates are pushed in along with the shrinkage of the bag body, the two plate glasses are pressed from both sides and firmly bonded to each other. Thereby, it is possible to manufacture a good laminated glass in which no bubbles remain between the two sheet glasses.

JP 2005-255466 A

  By the way, in recent years, a thin plate glass is being adopted in a composite plate material such as a laminated glass from the viewpoint of weight reduction. As this type of composite plate material, there are proposed one in which a plurality of thin glass plates are laminated and integrated through an adhesive layer, and one in which thin glass plates are laminated and integrated on both surfaces of a resin plate through an adhesive layer. .

  However, when the thin glass is used in this way, the thin glass may be damaged due to the contact with the rigid plate in the manufacturing process described above. Specifically, Patent Document 1 describes that a metal plate such as an iron plate is used as the rigid plate, but the surface of the metal plate often has fine irregularities, and contact scratches (indentations) on the thin plate glass. Etc.). In addition, when the rigid plate is a metal plate, the difference in thermal expansion from the thin glass during heating increases, so that the thin glass is easily rubbed. If the thin glass is scratched in this way, the damage strength is lower than that of the thick glass, so that there is a risk of cracking starting from the scratch.

  In view of the above circumstances, an object of the present invention is to prevent the thin glass contained in the laminate from being damaged in the manufacturing process of the composite plate material.

  The present invention devised to solve the above-mentioned problem is to press a laminated body formed by laminating a plurality of plate materials through an intermediate layer serving as an adhesive layer by heating with a pair of pressing plates from both sides of the front and back under negative pressure. Is a method of manufacturing a composite plate material by heating each of the laminates together with degassing, and at least one of the front and back surfaces of the laminate is made of thin glass, A low-friction sheet is disposed between the glass and the pressing plate facing the thin glass.

  According to such a configuration, since the low friction sheet is interposed between the thin glass and the pressing plate, the thin glass is not in direct contact with the pressing plate. Therefore, it is possible to suppress the thin glass sheet from being scratched by unevenness on the surface of the pressing plate. Moreover, even if a difference in thermal expansion occurs between the thin glass and the pressing plate due to heating, an appropriate slip is imparted between the thin glass and the pressing plate by the low friction sheet. Therefore, it is possible to suppress the thin glass from being scratched and scratched with the pressing plate.

  In the above configuration, the low friction sheet has non-adhesiveness, and protrudes from the front and back surfaces of the laminate in a state of being disposed between the front and back surfaces of the laminate and the respective pressing plates. preferable.

  According to such a structure, it can prevent that a press plate and a laminated body adhere | attach. Specifically, the adhesive derived from the intermediate layer may leak from between the laminates due to heating. Therefore, when this adhesive adheres to the pressing plate, the pressing plate is pressed against the laminated body in a close contact state, and thus there is a possibility that both are bonded. Therefore, if a non-adhesive low friction sheet is protruded from the laminate, it is possible to prevent the leaked adhesive from being covered by the low friction sheet and adhere to the pressing plate. In addition, since the low friction sheet has non-adhesiveness, even if an adhesive adheres to the low friction sheet, the low friction sheet is difficult to adhere to other members such as a laminate.

  Said structure WHEREIN: It is preferable that a press plate is glass.

  In this way, the flatness of the surface of the pressing plate can be easily ensured. Moreover, since the difference in thermal expansion between the pressing plate and the thin glass sheet of the laminate is reduced, the thin glass sheet is hardly damaged. Furthermore, since the pressing plate can be made transparent, the state of the stacked body can be confirmed through the pressing plate even after the stacked body is sandwiched between the pressing plates.

  In the above configuration, the pressing plate may be a laminated glass.

  If it does in this way, even if a press plate breaks, it can prevent that a glass piece scatters.

  In the above configuration, a spacer for separating the low friction material sheet from the side surface of the laminate may be disposed at least at a part of the periphery of the laminate.

  If it does in this way, the situation where a low friction sheet will stick to the side of a layered product by negative pressure, and the deaeration of the intermediate layer of a layered product may be prevented.

  Said structure WHEREIN: It is preferable that a spacer has a through-hole for distribute | circulating gas.

  In this way, since gas flows through the through hole of the spacer, the progress of deaeration can be maintained better.

  Said structure WHEREIN: It is preferable that the low friction sheet | seat is formed with the fluororesin.

  If it does in this way, low friction property and non-adhesiveness can be easily given to a low friction sheet.

  In the above configuration, the intermediate layer is preferably an adhesive sheet that melts by heating.

  If it does in this way, since an intermediate layer can be handled as a sheet before heating, formation work of a layered product becomes easy.

  Said structure WHEREIN: It is preferable that the said laminated body has a sheet glass on the front and back, and has a resin plate between the sheet glass.

  If it does in this way, weight reduction of the composite board material manufactured can be achieved easily. Moreover, since the front and back surfaces are each formed of thin glass, the effects of the present invention can be exhibited to the maximum.

  As described above, according to the present invention, since the low friction sheet is disposed between the pressing plate and the thin glass in the manufacturing process of the composite plate material, due to contact with the pressing plate, the thin glass is indented or rubbed. Scratches can be surely prevented.

It is sectional drawing for demonstrating the state of the opening stage of the manufacturing method of the composite board | plate material which concerns on 1st Embodiment of this invention. It is sectional drawing for demonstrating the state of the final stage of the manufacturing method of the composite board | plate material which concerns on 1st Embodiment. (A) And (b) is an enlarged view of the protrusion part periphery of the low friction sheet | seat in the manufacturing method of the composite board | plate material which concerns on 1st Embodiment. It is sectional drawing for demonstrating the state of the opening stage of the manufacturing method of the composite board | plate material which concerns on 2nd Embodiment of this invention. It is sectional drawing for demonstrating the state of the beginning of the manufacturing method of the composite board | plate material which concerns on 3rd Embodiment of this invention. It is sectional drawing for demonstrating the state of the first stage of the manufacturing method of the composite board | plate material which concerns on 4th Embodiment of this invention. It is a perspective view which shows the spacer of FIG. It is sectional drawing for demonstrating the state of the final stage of the manufacturing method of the composite board | plate material which concerns on 4th Embodiment. (A) And (b) is sectional drawing which shows the modification of the laminated body from which a composite board | plate material is based.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

<First Embodiment>
As shown in FIG. 1, the manufacturing apparatus for embodying the manufacturing method of the composite board | plate material which concerns on 1st Embodiment of this invention is a pair of press board 2 which sandwiches the front and back of the laminated body 1, and the laminated body 1 and a pair. A bag body (vacuum bag) 3 that accommodates the pressing plate 2 therein and a pump 4 that sucks the gas inside the bag body 3 are provided. In addition, the code | symbol 5 in a figure is the mounting surface of the bag body 3. FIG.

  The laminate 1 is obtained by laminating thin glass 8 on the front and back surfaces of a resin plate 6 via an adhesive sheet 7 as an intermediate layer.

  The thickness of the resin plate 6 is, for example, 0.5 mm to 15.0 mm, and the thickness of the thin glass plate 8 is, for example, 0.1 mm to 1.0 mm. In this embodiment, the thickness of the resin plate 6 is larger than the thickness of the thin glass plate 8. The resin plate 6 is formed of a transparent resin such as polycarbonate or acrylic. The thin glass 8 is formed by an overflow down draw method, a float method, or the like.

  The adhesive sheet 7 is formed of, for example, a heat crosslinkable adhesive (EVA, epoxy type), a thermoplastic adhesive (EVA, PVB, TPU, COP) or the like. The thickness of the adhesive sheet 7 is, for example, 0.1 mm to 1.0 mm. Instead of the adhesive sheet 7, a liquid adhesive may be applied in the form of a film to form an intermediate layer.

  The pressing plate 2 may be a metal plate or the like, but in this embodiment, a glass plate (preferably laminated glass) is used. Here, in addition to the laminated glass that is laminated and integrated with the adhesive layer, other laminated glass and resin plates are laminated and integrated between the two thin glasses with the adhesive layer. Also included. In the case of a glass plate, the thickness of the pressing plate 2 is, for example, 3.0 mm to 10.0 mm. In addition, when using a metal plate (aluminum plate etc.) as the press plate 2, the thickness of the press plate 2 is 3.0 mm-10.0 mm, for example. The size of the pressing plate 2 may be larger than that of the thin glass 8, but in this embodiment, it is about the same (same or slightly smaller) as the thin glass 8. This is because if the pressing plate 2 is larger than the thin glass plate 8, the pressing plate 2 is curved at the time of pressing, and the pressing force applied to the thin glass plate 8 may become uneven.

  Between the thin glass 8 which comprises the front and back of the laminated body 1, and the press plate 2 corresponding to each, the low friction sheet | seat 9 is arrange | positioned.

  The low friction sheet 9 is a non-adhesive fluororesin sheet, and specifically, PTFE, PFA, FEP, ETFE, PVDF, PCTFE, ECTFE, olefin, polyester, release-treated PET, or the like is used. . The thickness of the low friction sheet 9 is, for example, 0.02 mm to 1.0 mm. The low friction sheet 9 is larger than the thin glass 8 constituting the front and back surfaces of the laminate 1 and protrudes from the periphery of the thin glass 8. The protruding width of the low friction sheet 9 is, for example, 10.0 mm to 20.0 mm. Note that the low friction sheet 9 may not protrude from the periphery of the thin glass 8. Further, air permeability may be imparted to the low friction sheet 9.

  The bag body 3 is made of an elastic material having elasticity such as rubber, and a pipe 10 connected to the pump 4 is inserted into the opening thereof. The opening of the bag body 3 is fixed to the tube 10 by a fixing tool 11 such as rubber, and the airtightness inside the bag body 3 is maintained.

  Next, a method of manufacturing a composite plate material using the composite plate material manufacturing apparatus configured as described above will be described.

  First, as shown in FIG. 1, the front and back surfaces of the laminated body 1 are housed inside the bag body 3 in a state of being sandwiched between a pair of pressing plates 2 via a low friction sheet 9. Thereafter, the tube 10 connected to the pump 4 is inserted into the opening of the bag 3, and the opening of the bag 3 is fixed to the tube 10 with the fixture 11.

  Next, the pump 4 is operated, the gas inside the bag body 3 is discharged, and the air pressure inside the bag body 3 is set to a negative pressure. Then, as shown in FIG. 2, the bag body 3 contracts and comes into close contact with the pressing plate 2. In this process, the pressing plate 2 is pushed in by the bag 3 and presses the laminated body 1 from both sides. The atmospheric pressure inside the bag body 3 is set to 1000 Pa or less (preferably 100 Pa or less), for example.

  And in the state which pressed the laminated body 1 with the press board 2 in this way, the bag body 3 is heated from the outside and the adhesive sheet 7 contained in the laminated body 1 is fuse | melted. Thereby, the resin plate 6 and the thin glass plate 8 are firmly bonded by the adhesive layer derived from the adhesive sheet 7. As a result, a composite plate material is manufactured in which the thin glass 8 is laminated and integrated on the front and back surfaces of the resin plate 6 via the adhesive layer. Although heating temperature changes with kinds of adhesive sheet 7, it is set as about 80 to 140 degreeC, for example.

  If it does in this way, in the manufacturing process of a composite board | plate material, since the low friction sheet | seat 9 is arrange | positioned between the press plate 2 and the thin plate glass 8, an indentation, a rubbing, etc. are applied to the thin plate glass 8 by contact with the press plate 2. It is possible to reliably prevent scratches caused by

  In addition, when the glass plate 8 is restrained by the pressing plate 2 when the resin plate 6 expands due to heating, the force accompanying the expansion of the resin plate 6 acts on the glass plate 8 and the glass plate 8 May be damaged. However, since the appropriate slip is ensured between the thin glass plate 8 and the pressing plate 2 by the low friction sheet 7, the thin glass plate 8 is not restrained by the pressing plate 2, and the force accompanying expansion of the resin plate 6 is released. be able to.

  Further, in this embodiment, since a glass plate is used as the pressing plate 2, the difference in expansion due to heating is small between the thin glass 8 and the thin glass 8 is hardly scratched. From the viewpoint of preventing scratches, it is preferable that the pressing plate 2 and the thin glass 8 have the same glass composition. This is because the thermal expansion coefficients of the pressing plate 2 and the thin glass 8 can be made substantially the same.

  Furthermore, in this embodiment, since the low friction sheet 9 protrudes from the periphery of the thin glass 8, it can prevent that the press plate 2 and the laminated body 1 (thin glass 8) adhere | attach. Specifically, as shown in FIGS. 3A and 3B, the adhesive 12 derived from the adhesive sheet 7 may leak from between the laminates 1 due to heating. The leaked adhesive 12 can be covered by the protruding portion 9a. Thereby, it can prevent that the adhesive agent 12 adheres to the side surface 2a of the press plate 2, or the press surface 2b. In addition, since the low friction sheet 9 has non-adhesiveness, even if the adhesive 12 adheres to the low friction sheet 9, the low friction sheet 9 is difficult to adhere to other members such as the laminate 1. However, it can be easily removed.

Second Embodiment
As shown in FIG. 4, the manufacturing method of the composite plate material according to the second embodiment of the present invention is different from the manufacturing method of the composite plate material according to the first embodiment in that the protruding portion 9 a of the low friction sheet 9. It is in the aspect. That is, in this embodiment, the protruding portion 9a of the low friction sheet 9 is folded so as to straddle the pressing surface 2b of the pressing plate 2 from the opposite surface (non-pressing surface) 2c, and by the bent portion, The side surface 2a of the pressing plate 2 is wrapped. Since other points are common to the first embodiment, detailed description thereof is omitted.

  In this way, the side surface 2a and the pressing surface 2b of the pressing plate 2 can be reliably protected by the low friction sheet 9. Therefore, it is possible to prevent the adhesive 12 leaking from between the laminated bodies 1 with heating from adhering to the pressing plate 2.

  Further, the protruding portion 9a of the low friction sheet 9 is bent so as to reach the non-pressing surface 2c from the pressing surface 2b side of the pressing plate 2, and does not enter the laminated body 1 side. Therefore, it is possible to prevent the protruding portion 9a of the low friction sheet 9 from sticking to the side surface 1a of the laminated body 1 due to negative pressure and preventing the deaeration of the adhesive sheet 7 of the laminated body 1. In addition, if what has air permeability as the low friction sheet | seat 9, even if the protrusion part 9a of the low friction sheet | seat 9 is contacting the side surface 1a of the laminated body 1, deaeration of the adhesive sheet 7 is hard to be inhibited. .

<Third Embodiment>
As shown in FIG. 5, the manufacturing method of the composite plate material according to the third embodiment of the present invention is different from the manufacturing method of the composite plate material according to the first embodiment in the aspect of the negative pressure space. That is, in this embodiment, the laminated body 1 sandwiched between the two pressing plates 2 is disposed on the placement surface 5 without using the bag body, and the sheet 13 is covered thereon. The peripheral portion of the sheet 13 is fixed to the placement surface 5 by the fixture 14, and the pipe 10 connected to the pump 4 is inserted from a part of the peripheral portion of the sheet 13. The sheet 13 is formed of an elastic material having elasticity such as rubber. Since other points are common to the first embodiment, detailed description thereof is omitted.

  In addition, although the press plate 2 is arrange | positioned also under the laminated body 1, this press plate 2 may be abbreviate | omitted and the mounting surface 5 may be utilized as a downward press plate. In this case, the low friction sheet 9 is disposed between the mounting surface 5 and the thin glass plate 8.

<Fourth embodiment>
As shown in FIG. 6, the manufacturing method of the composite plate material according to the fourth embodiment of the present invention is different from the manufacturing method of the composite plate material according to the first embodiment in that a low friction sheet is provided around the laminate 1. A spacer 15 for separating 9 from the side surface 1a of the laminate 1 is disposed.

  Specifically, the spacer 15 has a cylindrical shape (pipe shape), and the outer diameter thereof is larger than the thickness of the laminated body 1 (preferably, the combined thickness of the pressing plate 2 and the laminated body 1). The cross-sectional shape of the spacer 15 may be a polygon such as a rectangular shape, for example.

  In this embodiment, the spacers 15 are respectively disposed on the sides of the two opposite sides of the stacked body 1. The spacers 15 need only be disposed on the sides of at least one side of the stacked body 1, but are preferably disposed on the sides of all four sides of the stacked body 1.

  The protruding portion 9a of the low friction sheet 9 is stretched over the outer peripheral surface of the spacer 15 so as to be separated from the laminated body 1 side. The spacer 15 is preferably non-adhesive like the low friction sheet 9.

  As shown in FIG. 7, the spacer 15 is provided with a plurality of through holes 15 a for circulating gas. As shown in FIG. 6, the space X defined by the low friction sheet 9 and the laminate 1, the space Y inside the spacer 15, and the space Z outside the spacer 15 are communicated with each other through the through hole 15 a. .

  Then, when the pump 4 is operated, the gas inside the bag body 3 is discharged, and the inside of the bag body 3 is set to a negative pressure, the bag body 3 contracts as shown in FIG. The laminated body 1 is pressed from both sides by the pressing plate 2. At this time, the gas in the space X is mainly discharged through the space Y and the space Z. Thereafter, the bag body 3 is heated to melt the adhesive sheet 7 of the laminate 1, and a composite plate material is manufactured.

  If it does in this way, the protrusion part 9a of the low friction sheet | seat 9 can maintain the state separated from the side surface 1a of the laminated body 1 by the spacer 15 in the manufacturing process of the composite board | plate material. Further, in the process in which the bag body 3 contracts, the spacer 15 may be drawn toward the laminated body 1 and may come into contact with the side surface 1a of the laminated body 1, but even in this case, the gas can be exhausted through the through hole 15a. it can. Therefore, deaeration of the adhesive sheet 7 is not hindered.

  Moreover, since the side surface 1a of the laminated body 1 is surrounded by the outer peripheral surface of the spacer 15 and the low friction sheet 9 at the place where the spacer 15 is disposed, the laminated body 1 is adhered from between the laminated bodies 1 with heating. Even if the agent leaks out, the adhesive can be prevented from adhering to the pressing plate 2.

  In addition, this invention is not limited to said embodiment, It can implement with a various form. For example, in the above-described embodiment, the laminated body 1 that is the base of the composite plate material has been described in which the thin glass 8 is laminated on the front and back surfaces of the resin plate 6 with the adhesive sheet 7 interposed therebetween. As shown in FIG. 9A, the adhesive sheet 7 is laminated only on one surface of the resin plate 6 as shown in FIG. A laminate of the thin glass plates 8 may be used. In the latter case, it is not necessary to arrange the low friction sheet 9 between the resin plate 6 and the pressing plate 2 in the manufacturing process of the composite plate material, but from the viewpoint of preventing the resin plate 6 from being scratched, the low friction sheet 9 is not required. It is preferable to arrange the sheet 9.

DESCRIPTION OF SYMBOLS 1 Laminated body 2 Pressing plate 3 Bag body 4 Pump 5 Mounting surface 6 Resin board 7 Adhesive sheet 8 Thin sheet glass 9 Low friction sheet 9a Extruding part 10 Tube 11 Fixing tool 12 Adhesive 15 Spacer 15a Through-hole

Claims (8)

The laminated body formed by laminating a plurality of plate materials through an intermediate layer that becomes an adhesive layer by heating is heated while pressing with a pair of pressing plates from both sides of the front and back under negative pressure, so that the lamination is performed while deaeration is performed. A method of manufacturing a composite plate by bonding each plate of a body to each other,
At least one of the front and back surfaces of the laminate is made of thin glass,
A method for producing a composite plate material, comprising: arranging a low friction sheet between the thin glass plate and the pressing plate facing the thin glass plate.   The low-friction sheet has non-adhesiveness, and protrudes from the front and back surfaces of the laminate in a state of being disposed between the front and back surfaces of the laminate and the respective pressing plates. The manufacturing method of the composite board | plate material of Claim 1.   The method for producing a composite plate material according to claim 1, wherein the pressing plate is glass.   The method for producing a composite plate material according to claim 1, wherein the pressing plate is laminated glass.   The composite sheet material according to any one of claims 1 to 4, wherein a spacer for separating the low friction sheet from a side surface of the laminate is disposed at least at a part of the periphery of the laminate. Production method.   The method for producing a composite plate material according to claim 5, wherein the spacer has a through hole for allowing a gas to flow therethrough.   The said intermediate | middle layer is an adhesive sheet fuse | melted by heating, The manufacturing method of the composite board | plate material of any one of Claims 1-6 characterized by the above-mentioned.   The method for producing a composite plate material according to any one of claims 1 to 7, wherein the laminate has thin glass on the front and back surfaces and a resin plate between the thin glasses.

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