JP5009724B2 - Auxiliary tool for heat bonding and method for bonding printed sheets using the same - Google Patents

Description

  The present invention provides, for example, printing sheets such as inkjet paper, coated paper, or high-quality paper subjected to inkjet recording or the like on a base plate for a heat-bonding type panel without causing wrinkles, slack, bubble entrapment or displacement. The present invention relates to a heat bonding auxiliary tool having a relatively simple structure that can be bonded accurately and efficiently, and a printing sheet bonding method using the same.

  When exhibiting printed sheets such as inkjet paper, coated paper or high-quality paper subjected to inkjet recording or the like, it is widely practiced to attach the printed sheet to a base plate to form an exhibition panel. 2. Description of the Related Art Conventionally, as a display panel base plate to which such a print sheet is attached, a plate-like polystyrene extruded foam or a veneer plate coated with an adhesive is often used. In particular, those using polystyrene foam as a base plate have recently been favorably used because of their light weight and workability. Here, an exhibition panel in which a printing sheet made of an exhibition photograph, a poster, or the like is pasted on such a base plate is required to be neatly pasted without bubbles of the printing sheet due to air bubbles. Therefore, when attaching photographs and posters to the base plate, it was necessary to pay close attention not to embed the air between the adhesive and it required skill to attach it. .

  On the other hand, even if the work of pasting the printing sheet on the base plate is successful, “blister”, that is, bubbles are generated on the surface of the photos and posters stuck due to changes over time, which significantly impairs the beauty of the display There was also. The occurrence of “blowing” is considered to be caused by a plurality of causes, one of which is an adhesive that adheres a printed sheet to a base plate. That is, in general, a type of adhesive in which the main component is dispersed in a solvent or water is widely used. However, if the adhesive is insufficiently dried after being attached to the base plate, Solvent or water remains in the adhesive. These residual components volatilize over time, but they are trapped by photographs and posters that are printed sheets with high gas shielding properties, and volatile components gather locally in areas with weak adhesive strength, so-called `` fluff Is thought to produce.

From this point of view, in order to essentially avoid the above-mentioned problem of “blowing due to residual solvent and water” caused by using an adhesive for laminating printing sheets, a volatile solvent and an alternative to the above adhesive are used. A heat-bonding panel base plate using a hot-melt adhesive containing no water has been proposed (see, for example, Patent Document 1). In this heat bonding type panel base plate, a plate-like foam, a paper material laminated and adhered to the front and back surfaces of the plate-like foam, and a hot-melt adhesive layer further coated on the surface of the paper material on the front side With. And the laminated body which laminated | stacked the back surface of the printing sheet surface-printed on the adhesive-layer surface of the base plate for heat bonding type panels is passed at least to a pair of heating rolls, and is heated to the temperature range in which a hot-melt-adhesive layer shows reactivation. Thus, the printed sheet is pressure-bonded to the base plate for the heat bonding type panel. If the hot-melt adhesive does not contain water at all, there is no generation of gas after bonding, and there is no so-called “blowing” caused by the gas being trapped by the printing sheet. ing.
JP-A-11-305702 (Claims)

However, as described above, even if the printing sheet can be prevented from “blowing” by using the heat-adhesive panel base plate, generally, the printing sheet made of inkjet paper, coated paper, fine paper, synthetic paper, or the like Because it is not self-supporting, it still requires experience and ingenuity to apply the printed sheet on the heat-adhesive panel base plate accurately and without causing wrinkles, slack, or misalignment. If this is the case, there is a risk that the sticking will fail.
Further, in order to adhere the print sheet to the base plate for the heat-bonding type panel, the laminate is passed through at least a pair of heating rolls, but when the reactivation of the adhesive layer on the side that passes through the pair of heating rolls is delayed There is also a problem that the printing sheet is not sufficiently adhered at the leading edge, and the leading edge of the printing sheet is wound up by a roll and passes through the pair of rolls in a state where the leading edge of the printing sheet is rolled up.

An object of the present invention is to provide a heat bonding auxiliary with a relatively simple structure capable of accurately and efficiently laminating a printed sheet on a heat bonding type panel base plate without causing wrinkles, loosening or displacement. Another object is to provide a tool and a method for bonding a printed sheet using the same.
Another object of the present invention is to provide an auxiliary tool for heat bonding that can effectively prevent the printing sheet from rolling up when passing through a pair of heating rolls, and a method for bonding a printing sheet using the same.

In the invention according to claim 1, as shown in FIG. 1, the back surface of the printed sheet 16 whose surface is printed on the surface of the adhesive layer 15 of the square heat bonding type panel base plate 11 is laminated, This is a heating bonding auxiliary tool 20 for passing the printing sheet 16 to the base plate 11 through at least a pair of heating rolls 17.
The characteristic configuration includes a rectangular bottom plate 21 having an area larger than that of the base plate 11, elastic elongated edge portions 22 provided on at least two adjacent sides of the square of the bottom plate 21, and a pair of rolls 17. A transparent or translucent heat-resistant cover sheet 23 having an end bonded to one end of the back surface of the bottom plate 21 on the side to be passed through and having a size capable of covering part or all of the bottom plate surface and the edge portion 22. The edge portion 22 is at a position where the thickness D is larger than the thickness d of the laminated body 10 and is compressed to the thickness of the laminated body 10 when the pair of rolls 17 is passed.

  In the heat bonding auxiliary tool described in claim 1, the laminated body 10 is stacked on the surface of the bottom plate 21, and at least two adjacent sides of the heat bonding type panel base plate 11 and the printing sheet 16 are arranged side by side. The printing sheet 16 can be accurately laminated on the base plate 11 for a heat-bonding panel by bringing it into contact with the edges 22. Therefore, the printed sheet 16 can be bonded to the heat bonding type panel base plate 11 by passing the laminate 10 through the pair of heating rolls 17 in this state. At this time, although the thickness D of the edge portion 22 is larger than the thickness d of the laminated body 10, when the pair of rolls 17 are passed, the edge edge portion 22 compresses to the thickness of the laminated body 10. There is no hindrance to bonding to the base plate 11 for heat bonding type panel. As a result, this heat bonding auxiliary tool can accurately and efficiently bond the print sheet on the heat bonding panel base plate without causing wrinkles, slack, or misalignment.

  In addition, the auxiliary tool for heat bonding described in claim 1 includes a cover sheet 23 that covers the laminate 10 when the pair of rolls 17 are passed, and passes the end of the cover sheet 23 through the roll 17. Since it adheres to the bottom plate 21 on the side, the cover sheet 23 prevents the printing sheet on the side that passes through the pair of heating rolls from being rolled up by the roll. For this reason, by using this heating and bonding auxiliary tool, it is possible to effectively prevent the printed sheet from being rolled up when passing through the pair of heating rolls.

The invention according to claim 2 is the invention according to claim 1, characterized in that the edge portion 22 is provided at least on the side of the bottom plate 21 on the side that first passes through the pair of rolls 17 of the bottom plate 21. To do.
In the heat bonding auxiliary tool described in claim 2, when the laminate 10 is passed through the heating roll 17 and the print sheet 16 is bonded to the heat bonding type panel base plate 11, The edge of the printing sheet 16 can be made to correspond to the edge of the heat bonding type panel base plate 11, and the bonding can be made more accurate.

The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the edge portion 22 is made of a foam made of synthetic resin or synthetic rubber.
In the heat bonding auxiliary tool according to the third aspect, the edge portion 22 that compresses the laminate 10 to the thickness of the laminate 10 when the laminate 10 is passed through the pair of rolls 17 can be obtained relatively easily.

The invention according to claim 4 is the invention according to claim 3, wherein the thickness D of the edge portion 22 is 1.1 to 2.5 times the thickness d of the laminate 10, and the edge portion The foam constituting 22 is characterized in that the compression stress when compressed by 50% is in the range of 1 to 50 kPa, and the compression set when compressed by 50% is 5.0% or less.
In the auxiliary tool for heat bonding described in claim 4, the edge portion 22 can be compressed to the thickness of the laminate 10 when the laminate 10 is passed through the pair of rolls 17. The lifetime can be made relatively long.

  As shown in FIG. 4, the invention according to claim 5 is a laminate 10 in which the back surface of a printed sheet 16 that is surface-printed on the surface of the adhesive layer 15 of the square heat-bonding panel base plate 11 is laminated. The step of stacking on the surface of the bottom plate 21 in the auxiliary tool 20 according to any one of 1 to 4, and the heating adhesive panel base plate 11 and the printing sheet 16 constituting the laminate 10 as shown in FIG. The step of bringing at least two sides adjacent to each other into contact with the side edge portions 22 provided on the two adjacent sides of the bottom plate 21 respectively, and the laminate 10 as shown in FIG. A step of covering with a cover sheet 23 together with a part or the whole, and passing the laminate 10 through at least a pair of heating rolls 17 while being stacked on the bottom plate 21 and covered with the cover sheet 23 as shown in FIG. Ri is a bonding method of a print sheet and a step of bonding the printed sheet 16 to the heat-adhesive panel support plate 11.

  As shown in FIG. 4, the invention according to claim 6 places a square heat-bonding panel base plate 11 on the surface of the bottom plate 21 of the auxiliary tool 20 according to any one of claims 1 to 4. A step of bringing at least two adjacent sides of the base plate 11 for the heat bonding type panel into contact with the edge portions 22 provided on the two adjacent sides of the bottom plate 21, and the adhesive layer 15 surface of the base plate 11 for the heat bonding type panel Laminating the back surface of the printing sheet 16 having the surface printed thereon, and bringing the at least two adjacent sides of the printing sheet 16 into contact with the edge portions 22 provided on the two adjacent sides of the bottom plate 21, respectively, and heat bonding A step of covering the laminated body 10 in which the printing sheet 16 is laminated on the mold panel base plate 11 with a cover sheet 23 together with a part or all of the edge portion 22, and the laminated body 10 is stacked on the bottom plate 21 to cover the cover sheet 23. In And a step of adhering the print sheet 16 to the base plate 11 for heat-bonding type panel by passing it through at least a pair of heating rolls 17 in a more coated state.

  In the printing sheet bonding method according to claim 5 and claim 6, since at least two adjacent sides of both the heat-bonding panel base plate 11 and the printing sheet 16 are brought into contact with the edge portion 22, respectively. The printing sheet 16 can be accurately laminated and bonded to the heat-bonding panel base plate 11. In addition, since the cover sheet 23 covers the printing sheet on the side that passes through the roll 17, it is possible to prevent the printing sheet on the side that passes through the pair of heating rolls from being rolled up by the roll.

  In the heating and bonding auxiliary tool of the present invention, a rectangular bottom plate, an elastic long and narrow edge provided on at least two adjacent sides of the bottom plate, a part of the bottom plate surface and the edge, or And a heat-resistant cover sheet having a size that can be entirely covered, so that the laminated body is stacked on the surface of the bottom plate, and at least two adjacent sides of both the heat-adhesive panel base plate and the printed sheet are bordered. By making it contact with each part, a printing sheet can be correctly laminated | stacked on the base plate for heat bonding type panels. Accordingly, by passing the laminate through a pair of heating rolls in this state, the printed sheet can be accurately and efficiently bonded to the base plate for the heat-bonding panel without causing wrinkles, slack, or displacement. . Also, since the end of the cover sheet is bonded to the bottom plate on the side that first passes through the roll, the cover sheet can prevent the printing sheet on the side that passes through the pair of heating rolls from being rolled up by the roll. it can.

  Further, in the printing sheet bonding method of the present invention, such a heat bonding auxiliary tool is used, so that at least two adjacent sides of both the heat bonding type panel base plate and the printing sheet are brought into contact with the edge portions, respectively. By this, a printing sheet can be correctly laminated | stacked and adhere | attached on the base plate for heat bonding type panels. Moreover, since the printing sheet on the side to be passed through the roll is covered by the cover sheet, the printing sheet on the side to be passed through the pair of heating rolls can be prevented from being wound up by the roll.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.
As shown in FIG. 1, the auxiliary tool 20 for heat bonding according to the present invention includes a laminate 10 in which the back surface of a printed sheet 16 that is surface-printed on the adhesive layer 15 surface of a square heat bonding panel base plate 11 is laminated. The printed sheet 16 is bonded to the base plate 11 through at least a pair of heating rolls 17.

A base plate 11 for a heat-bonding panel shown in FIG. 1 includes a plate-like foam 12, a paper material 14 laminated on the surface of the plate-like foam 12 with an adhesive 13, and the surface of the paper material 14. And a hot melt adhesive layer 15 that is further coated. This plate-like foam 12 is mainly composed of a specific polyolefin resin composition and a specific inorganic filler. Examples of the polyolefin resin composition include low density polyethylene, linear low density polyethylene, EVA (ethylene One or a mixture of two or more selected from (vinyl acetate) resins. Examples of the paper material 14 include craft paper, coated paper, and synthetic paper. Paper having a basis weight of 100 to 300 g / m ² is used. As the adhesive 13 for laminating and bonding the paper material 14 to the plate-like foam 12, a hot-melt adhesive, a solvent-based adhesive, an emulsion-based adhesive, a pressure-sensitive adhesive, or the like can be used. Agents are preferred. The hot melt adhesive layer 15 is formed by coating the surface of the paper material 14 with a hot melt adhesive that exhibits reactivation.

  On the other hand, examples of the printing sheet 16 include inkjet paper, coated paper, high-quality paper, and the like on which ink-jet recording or the like having a pattern and text printed on the surface is performed.

  As shown in FIGS. 1 and 6, the heat bonding auxiliary tool 20 of the present invention for bonding a printing sheet 16 to the heat bonding type panel base plate 11 includes a bottom plate 21, a peripheral edge 22, and a cover sheet 23. . The bottom plate 21 mounts the laminated body 10 on the surface thereof, and therefore, it is necessary to have a larger area than the base plate 11 constituting the laminated body 10, and a plate material made of a square like the panel base plate 11. It becomes more. Since the bottom plate 21 carries the laminated body 10 and passes the laminated body 10 through the pair of heating rolls 17, it is required to have a certain degree of rigidity, a relatively thin thickness, and a certain degree of heat resistance. For this reason, the bottom plate 21 is exemplified by a plate made of a metal such as aluminum, or a synthetic resin having a relatively high heat resistance and high rigidity such as an acrylic resin or a polyamide resin. It is preferably about 1 to 2 mm.

  As shown in FIG. 6, the edge portion 22 is provided on at least two sides of the bottom plate 21 that are adjacent to each other. The material of the edge portion 22 is preferably a foam made of synthetic resin or synthetic rubber and excellent in compressive stress and compression set. Specific examples of foams excellent in compressive stress and compression set include, for example, rubber foams that are so-called rubber sponges such as natural rubber or synthetic rubber, flexible urethane foams, vinyl chloride foams, polyolefin resin foams, etc. Is exemplified. Examples of the polyolefin-based resin include low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, and ethylene-propylene copolymer such as EPDM.

  The foaming ratio of the foam constituting the edge portion 22 can be used in the range of 2 to 100 times in terms of processability, compression set, and the like. When the expansion ratio is lower than 2 times, these performances are not expressed. When the expansion ratio exceeds 100 times, the practical strength of the foam is inferior, and various performances are also deteriorated. Preferably it is the range of 5-50 times. And as for this foam, it is preferable that the 50% compressive stress when compressed to 50% is in the range of 1 to 50 kPa, and more preferably in the range of 2 to 30 kPa. That is, if the 50% compressive stress exceeds 50 kPa, the flexibility is inferior and the pressure required for the laminate increases, so that the adhesion workability is inferior. Further, when the 50% compressive stress is less than 1 kPa, the laminate 10 is easily deformed even with a small stress, so that the stack 10 is likely to be displaced.

Here, the 50% compressive stress is a value calculated by the following method in accordance with JIS K-6767. That is, the sheet-like samples in which the top and bottom surfaces are parallel and the periphery is cut are stacked, and the foams are stacked so that the external dimensions are 50 mm in length, 50 mm in width, and 25 to 30 mm in thickness. The thickness of this product is precisely measured, sandwiched between predetermined test equipment, 50% of the initial thickness is compressed at a compression speed of 10 mm / min, and the load W (N) is measured, and calculated according to the following formula (1). To do. In this equation (1), “σ” represents 50% compression stress (Pa), “W” represents load (N), and “A” represents compression area (m ² ).

σ = W / A (1)
Further, the foam constituting the edge portion 22 is required to have a 50% compression set when compressed to 50% is 5.0% or less, preferably 2.0% or less. If the 50% compression set exceeds 5%, the deformation is too large, so that the compression allowance for compression to the thickness of the laminate 10 is reduced, resulting in poor adhesion.

  Here, the 50% compression set is a value calculated by the following method in accordance with JIS K-6767. That is, the foam-like samples are stacked so that the upper and lower surfaces are parallel and the periphery is cut, and the outer dimensions are 50 mm in length, 50 mm in width, and 25 mm in thickness. The thickness of this product is precisely measured, sandwiched between predetermined test devices, compressed and fixed by 50% of the thickness of the test piece, and left in a standard state for 22 hours continuously. Then, after removing a test piece and leaving it to stand in the place of a standard state for 24 hours, the thickness of the same location as before is measured, and it calculates according to the following formula | equation (2). In this equation (2), “C” indicates 50% compression set (%), “t0” indicates the initial thickness (mm) of the test piece, and “t1” indicates after the test of the test piece. The thickness (mm) is shown.

C = (t0−t1) / t0 × 100 (2)
Such a foam is formed into an elongated shape, and is adhered to or adhered to at least two sides of the quadrangular side of the bottom plate 21 so as to be provided on the bottom plate 21 to form a long and narrow edge portion 22 having elasticity. And this edge part 22 needs to be compressed to thickness d of the laminated body 10 when the thickness D is larger than the thickness d of the laminated body 10 and the pair of rolls 17 is passed. , The thickness D of the edge portion 22 is 1.1 to 2.5 times, preferably 1.2 to 2.0 times the thickness d of the laminate 10. The thickness D is practically preferably in the range of 1 to 10 mm. In addition, the edge part 22 shown in FIG. 6 shows the case where one of them is provided in the edge | side of the side which lets the pair of rolls 17 (FIG. 1) of the baseplate 21 pass initially.

  The cover sheet 23 is a rectangular sheet that covers the laminate 10 mounted on the surface of the bottom plate 21, and as shown in FIGS. 1 to 5, the bottom plate on the side where the end portion first passes through the pair of rolls 17. It is bonded to one end edge of the back surface of 21. The cover sheet 23 is folded at the edge of the bottom plate 21 on the side that is first passed through the roll 17 (FIG. 1), and its end is adhered to the back surface of the bottom plate 21 so as to cover the surface of the bottom plate 21. The surface of the bottom plate 21 and a part or all of the edge portion 22 are formed in a size that can be covered. Since this cover sheet 23 covers the laminate 10 mounted on the surface of the bottom plate 21, it is required to be relatively flexible, and since it is passed through the heating roll 17, heat resistance is also required. To do. The cover sheet 23 is required to be transparent or translucent so that the presence of the laminate 10 covered with the cover sheet 23 can be visually recognized. For this reason, the cover sheet 23 is a sheet made of a polyester resin such as polyethylene terephthalate (PET), a sheet made of a polyamide resin such as nylon, or a sheet made of a polyimide resin having higher heat resistance (for example, Toray Industries, Inc.). DuPont's trade name “Kapton”) and the like are exemplified. And in order to ensure the softness | flexibility, it is preferable that the thickness is 50-100 micrometers.

Next, a method for bonding the printed sheet 16 using the heating bonding auxiliary tool 20 will be described.
<Laminated body loading process>
First, the laminated body 10 is prepared. As shown in FIG. 1, the laminate 10 is formed by laminating the back surface of the printed sheet 16 that is printed on the surface of the adhesive layer 15 of the square heat-bonding panel base plate 11, and as shown in FIG. 7, This laminated body 10 is loaded on the surface of the bottom plate 21 in the auxiliary tool 20 described above. As shown in FIGS. 4 and 5, the mounting is performed such that the base plate 11 is on the bottom plate 21 side and the printing sheet 16 is exposed on the surface.

<Edge part contact process>
Next, as shown in FIGS. 3 and 4, at least two sides adjacent to each other of the base plate 11 for the heat-bonding type panel and the printing sheet 16 constituting the laminate 10 are arranged on the two sides adjacent to the bottom plate 21. Are brought into contact with the edge portions 22 provided on each. That is, since the adhesive layer 15 of the heat bonding type base plate 11 can be reactivated and heated and bonded to the print sheet 16 by heating, the print sheet 16 is simply laminated on the adhesive layer 15 of the base plate 11. 16 does not adhere to the base plate 11, and the print sheet 16 can be moved while being stacked on the base plate 11. For this reason, as shown in FIG. 7, the two adjacent sides of the printing sheet 16 are adjacent to the base plate 11 by bringing at least two sides adjacent to each other into contact with the side edge portion 22 of the auxiliary tool 20. Matches two sides. Therefore, the printing sheet 16 can be accurately laminated on the base plate 11 without generating wrinkles, slackness, or displacement by this process.

<Coating process>
Next, as shown in FIG. 2, the laminated body 10 that is mounted on the bottom plate 21 and has two adjacent sides brought into contact with the edge portion 22 is covered with a cover sheet 23 together with a part or all of the edge portion 22. To do. Here, since the end of the cover sheet 23 is bonded to one end of the back surface of the bottom plate 21 on the side that first passes through the pair of rolls 17, the cover sheet 23 passes through the rolls 17 as indicated by solid line arrows in FIG. 3. The laminated body 10 mounted on the bottom plate 21 is covered with the cover sheet 23 by folding back at the edge of the bottom plate 21 on the side to be used.

<Heat bonding process>
Next, as shown in FIG. 1, the laminated sheet 10 is passed through at least a pair of heating rolls 17 while being stacked on the bottom plate 21 and covered with the cover sheet 23, whereby the print sheet 16 is heated and bonded to the panel base plate 11. Adhere to. That is, the adhesive layer 15 of the heat-bonding type base plate 11 can be reactivated and heated and bonded to the printing sheet 16, so that the laminate 10 needs to be passed through a heating roller. Here, since the printing sheet 16 is laminated on the adhesive layer 15, it is necessary to heat the printing sheet 16 itself, and at least the adhesive layer 15 has a heating roller that contacts the cover sheet 23 covering the printing sheet 16. It is heated above the temperature showing reactivation. Then, by passing through such a heating roll 17, the adhesive layer 15 is reactivated and the printing sheet 16 can be bonded to the base plate 11.

  As described above, in the adhesion of the print sheet using the above-described heat bonding auxiliary tool, the laminated body 10 is stacked on the surface of the bottom plate 21, and both the heat bonding panel base plate 11 and the print sheet 16 are adjacent to each other. Since at least two sides are respectively brought into contact with the edge portion 22, the printing sheet 16 can be accurately laminated on the base plate 11 for the heat-bonding panel. In this state, the laminate 10 is passed through a pair of heating rolls 17 so that the print sheet 16 is bonded to the heat-adhesive panel base plate 11. Bonding can be performed accurately and efficiently without slack or misalignment. At this time, although the thickness D of the edge portion 22 is larger than the thickness d of the laminated body 10, when the pair of rolls 17 are passed, the edge edge portion 22 compresses to the thickness of the laminated body 10. There is no hindrance to bonding to the base plate 11 for heat bonding type panel.

  Further, since the cover sheet 23 covers the laminated body 10 when the pair of rolls 17 are passed, the cover sheet 23 prevents the printing sheet 16 on the side to be passed through the pair of heating rolls from being rolled up by the rolls. For this reason, it is possible to effectively prevent the printed sheet from rolling up when passing through the pair of heating rolls.

  In the above-described embodiment, in the printing sheet adhering method, the stack 10 prepared in the stack stacking process is stacked on the surface of the bottom plate 21, and then the stack 10 is configured in the edge contact step. Although the at least two sides adjacent to each other of both the base plate 11 and the printing sheet 16 for the heat bonding type panel are brought into contact with the edge portions 22 provided on the two adjacent sides of the bottom plate 21, respectively, The heat bonding type panel base plate 11 is placed on the surface of the bottom plate 21 of the auxiliary tool 20, and at least two adjacent sides of the heat bonding type panel base plate 11 are provided on two adjacent sides of the bottom plate 21. After the step of contacting the portion 22, the back surface of the printing sheet 16 whose surface is printed is laminated on the surface of the adhesive layer 15 of the heat bonding type panel base plate 11, and the printing sheet 16 is adjacent to the back surface. At least two sides are provided in contact with the edge portions 22 provided on two adjacent sides of the bottom plate 21, whereby the laminate 10 in which the print sheet 16 is laminated on the base plate 11 for the heat-bonding panel. May be obtained.

Next, examples of the present invention will be described in detail together with comparative examples.
<Preparation of base plate for heat bonding type panel>
First, the plate-like foam 12 used for the base plate 11 for heat bonding type panels was produced. That is, 78.8 parts by mass of a low density polyethylene (manufactured by Nippon Unicar Co., Ltd., product number “NUC-8505”) having an MFR of 0.8 g / 10 min, and a linear shape having an MFR of 0.8 g / 10 min Low density polyethylene (made by Nippon Unicar Co., Ltd., product number “NUCG-4953”) 10.6 parts by mass, EVA resin containing 3.0% VA (vinyl acetate) and MFR 1.0 g / 10 min ( Nippon Unicar Co., Ltd., product number “NUC-8552D”) 100 parts by mass of polyolefin resin composition consisting of 10.6 parts by mass and heavy calcium carbonate having an average particle size of 4 μm (product of Sankyo Seimitsu Co., Ltd., product) Number “Escalon # 200”) 102.9 parts by mass, 7.0 parts by mass of foaming agent, 1.1 parts by mass of foaming aid, and 1,3-bis (tert-butylperoxyisopropyl) as a crosslinking agent ) A composition obtained by further mixing 1.1 parts by weight of Nzen (product name “Parkadox 14-40” manufactured by Kayaku Akzo Co., Ltd.) and 0.2 parts by weight of a lubricant is set at an in-machine temperature of 120 ° C. After mixing in an internal mixer for 4 minutes, a sheet with a thickness of 2 mm was prepared with two rolls, and this sheet was heated under pressure at 180 ° C. under a pressure of 100 kg / cm ^{2 for} 15 minutes. Foam was taken out, and then taken out and cooled with a press at a temperature of 20 ° C. for 30 minutes to obtain a foam original plate, which was applied to a slicer to obtain a polyolefin resin plate foam having a thickness of 3 mm. When the physical properties of the resin plate-like foam were measured, the hardness in SRIS0101 was 40 degrees and the apparent density was 100 kg / cm ³ .

A paper material 14 made of synthetic paper having a basis weight of 240 g / m ² is used on the surface of the polyolefin resin plate-like foam 12 by using a hot melt adhesive (trade name “Hirodyne 4305” manufactured by Yasuhara Chemical Co., Ltd.). Laminated and bonded. Thereafter, a hot melt adhesive (manufactured by Yashara Chemical Co., Ltd., trade name “HIRODYNE” having EVA as a main component, a melt viscosity of 3,900 mPa · s / 180 ° C. and a softening point of 77 ° C. 4305 ") was applied to the surface of the paper material at 15 to ²⁰ g / m ² to form a hot melt adhesive layer 15. This obtained the base plate 11 for heat bonding type panels.

<Preparation of heat bonding aids>
An acrylic resin plate having a length of 330 mm / width of 235 mm / thickness of 2 mm was used as the bottom plate 21. Then, an EPDM foam having a semi-open cell structure having a width of 10 mm as a resilient material and a thickness of 5 mm (rubber sponge manufactured by Sanwa Kako Co., Ltd.) Opsealer OP130 ”) was bonded as the edge 22. Further, as the heat-resistant cover sheet 23, a polyimide resin film (trade name “Kapton” manufactured by Toray DuPont Co., Ltd.) having a length of 330 mm and a width of 235 mm and a thickness of 50 μm is used, and the end of the film is a bottom plate. The auxiliary part 20 of the present invention shown in FIG. 6 was obtained by adhering to one end edge of the back surface on the side to be passed through 21 rolls 17.

<Example 1>
On one side of the auxiliary tool 20, the heating adhesive layer 15 surface of the heat-adhesive panel base plate 11 and the coated paper (thickness 70 μm) subjected to ink jet recording printing are overlapped in this order as a printing sheet 16, After these two adjacent sides are stacked so as to be in contact with the edge portion 22 provided on the auxiliary tool 20, the coated paper, the base plate for the heat-bonding panel, and the auxiliary tool are attached to a pair of heating rubber roll and guide roll. It was passed once through a laminator for foam board (manufactured by R.S. Japan Co., Ltd., maximum laminate width 235 mm), and the base plate for the heat-bonding panel and the coated paper were bonded. The laminating test was performed at a set temperature of the upper heating roll of 130 ° C. and a laminating speed of 410 mm / min.
As a result of the above, coated paper that has been subjected to ink jet recording printing can be satisfactorily bonded to the heat-adhesive panel base plate without any wrinkles or misalignment, and the heat-adhesive panel base plate can also be heated. There was no warping or the like.

<Example 2>
A heat-adhesive panel was tested under the same conditions as in Example 1 except that high-quality paper (thickness: 100 μm) subjected to inkjet recording printing was used as the printing sheet 16 instead of the coated paper of Example 1. The base plate and high-quality paper were bonded.
As a result of the above, high-quality paper that has been subjected to inkjet recording printing can be satisfactorily bonded to the heat-adhesive panel base plate without any wrinkles or misalignment, and the heat-adhesive panel base plate can also be heated. There was no warping or the like.

<Example 3>
A thin and thick inkjet paper (thickness of 150 and 240 μm respectively) subjected to inkjet recording printing instead of the high-quality paper of Example 2 was used as the printing sheet 16, and the set temperature of the upper heating roll was set to 150 ° C. The test was performed under the same conditions as in Example 1 except that the heat-bonding panel base plate and thin and thick inkjet papers were bonded together.
As a result of the above, the ink jet recording printing paper can be satisfactorily bonded without any wrinkles or misalignment on the heat bonding type panel base plate, and the heat bonding type panel base plate is also warped by heat. It never happened.

<Comparative Example 1>
Without using the auxiliary tool 20 of the present application, the heat-adhesive layer surface 15 of the heat-adhesive panel base plate 11 and the back surface of the print sheet 16 made of coated paper (thickness 70 μm) subjected to inkjet recording printing are stacked in this order. In addition, the coated paper and the base plate for the heat-bonding panel are passed once through a laminator for foam board having a pair of heated rubber rolls and a guide roll (manufactured by R.S. Japan Co., Ltd., maximum laminate width 235 mm), The base plate for heat bonding type panel and the coated paper were bonded. The laminating test was performed at a set temperature of the upper heating roll of 130 ° C. and a laminating speed of 410 mm / min.

As a result, the coated paper subjected to ink jet recording printing was adhered on the base plate for heat bonding type panel with the four corners slightly shifted and wrinkled on the surface.
This is because the at least two adjacent sides of both the heat-adhesive panel base plate 11 and the print sheet 16 cannot be brought into contact with the edge portion 22, so the print sheet 16 is attached to the heat-adhesive panel base plate 11. This is thought to be due to the fact that it could not be laminated accurately.

It is sectional drawing which shows the state which has passed the heating roll on both sides of the laminated body with the auxiliary tool of this invention embodiment. It is sectional drawing which shows the state which pinched | interposed the laminated body with the auxiliary tool. It is the sectional view on the AA line of FIG. 7 which shows the state which has contacted the side edge of the laminated body put on the baseplate of the auxiliary tool with the edge part. It is sectional drawing corresponding to FIG. 3 which shows the state which installed the laminated body on the baseplate of the auxiliary tool. It is sectional drawing corresponding to FIG. 3 which shows the state which installs a laminated body in the auxiliary tool. It is a perspective view of the auxiliary tool. It is a perspective view corresponding to FIG. 6 which shows the state which installed the laminated body on the baseplate of the auxiliary tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Laminated body 11 Base plate for heat bonding type panels 15 Adhesive layer 16 Printing sheet 17 Heating roll 20 Heat bonding auxiliary tool 21 Bottom plate 22 Edge part 23 Heat resistant cover sheet D Thickness of edge part d Thickness of laminated body

Claims (6)

The back surface of the printed sheet (16) printed on the surface of the adhesive layer (15) of the square heat bonding panel base plate (11) is laminated, and this laminate (10) is at least a pair of heating rolls (17 ) Is a heating bonding auxiliary tool (20) for bonding the printed sheet (16) to the base plate (11),
A rectangular bottom plate (21) having a larger area than the base plate (11);
A resilient elongated edge (22) provided on at least two sides of the quadrangle of the bottom plate (21); and
An end portion is bonded to one end of the back surface of the bottom plate (21) on the side to be passed through the pair of rolls (17), and a size capable of covering a part or all of the bottom plate surface and the edge portion (22). A transparent or translucent heat-resistant cover sheet (23) having
The marginal portion (22) has a thickness (D) larger than the thickness (d) of the laminate (10) and passes through the pair of rolls (17). A heat bonding aid characterized by being compressed to   2. The heating bonding auxiliary tool according to claim 1, wherein the side edge portion (22) is provided on a side of the bottom plate (21) on the side that first passes through the pair of rolls (17).   The auxiliary tool for heat bonding according to claim 1 or 2, wherein the edge (22) is made of a foam made of synthetic resin or synthetic rubber.   The thickness (D) of the edge portion (22) is 1.1 to 2.5 times the thickness (d) of the laminate (10), and the foam constituting the edge portion (22) is The auxiliary tool for heat bonding according to claim 3, wherein the compression stress when compressed by 50% is in the range of 1 to 50 kPa, and the compression set when compressed by 50% is 5.0% or less. The laminated body (10) in which the back surface of the printed sheet (16) whose surface is printed is laminated on the adhesive layer (15) surface of the square heat bonding type panel base plate (11). A step of loading on the surface of the bottom plate (21) in the auxiliary tool (20) described in 1.
At least two sides adjacent to each other for both the heat-bonding panel base plate (11) and the printed sheet (16) constituting the laminate (10) are provided on two adjacent sides of the bottom plate (21). Each of the contacted edges (22),
Covering the laminate (10) with a cover sheet (23) together with a part or all of the edge portion (22);
The printed sheet (16) is heated and bonded by passing the laminate (10) on the bottom plate (21) and passing through at least a pair of heating rolls (17) in a state of being covered with the cover sheet (23). A method for adhering a printed sheet, comprising a step of adhering to a mold panel base plate (11). A square heat bonding type panel base plate (11) is placed on the surface of the bottom plate (21) of the auxiliary tool (20) according to any one of claims 1 to 4, and the heat bonding type panel base plate (11). ) Contacting at least two sides adjacent to the side edge (22) provided on two adjacent sides of the bottom plate (21);
Laminating the back surface of the printed sheet (16) whose surface is printed on the surface of the adhesive layer (15) of the base plate (11) for the heat bonding type panel, and at least two adjacent sides of the printed sheet (16) are the bottom plate ( 21) contacting each of the edge portions (22) provided on two adjacent sides;
A step of covering the laminate (10) in which the printing sheet (16) is laminated on the base plate (11) for the heat-bonding panel with a cover sheet (23) together with a part or all of the edge portion (22). When,
The printed sheet (16) is heated and bonded by passing the laminate (10) on the bottom plate (21) and passing through at least a pair of heating rolls (17) in a state of being covered with the cover sheet (23). A method for adhering a printed sheet, comprising a step of adhering to a mold panel base plate (11).

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