JPH01244833A - Jointed sheet for decorative illumination and method for joining - Google Patents

Abstract

PURPOSE:To prevent the discontinuity in decorative illumination effect from generating by a method wherein adhesive having the specified light transmittance is filled in the gap, by which two edge parts of sheets for decorative illumination having the specified light transmittance are separated on an adhesive tape having the light transmittance higher than that of the sheet for decorative illumination, and solidified so as to make the sheets and the tape into an integral body. CONSTITUTION:The edge parts 1a and 1b of sheets for decorative illumination are arranged on an adhesive tape 2 so as to be opposite to each other under the state that the proper gap is left between them. Next, adhesive is filled in the gap 3 and solidified so as to form a solidified filling layer 4 in order to form a bonded and filled member 5 together with the adhesive tape 2. In this case, the light transmittance of the sheet for decorative illumination is 0.08-10% and the light transmittance of the adhesive tape used is higher than that of the sheet for decorative illumination. Further, the light transmittance of the adhesive used for filling is 60-140% of that of the sheet for decorative illumination. As a result, the edge parts of the sheets for decorative illumination can be strongly jointed and no discontinuous part in decorative illumination effect is produced at the joint.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a joined body of sheets for illumination (electrical decoration) and a joining method. The present invention relates to a joined body of illumination sheets that does not cause discontinuity in effect, and a joining method.

[Prior art and problems to be solved by the invention]

As a recent display sheet, a light source is placed on the back side of the sheet,
During the day, the displayed information on the surface side can be observed using reflected light.
At night, a display device that uses both reflected light and transmitted light, such as a signboard called a backlift, is used, which uses a light source to illuminate the entire display sheet with transmitted light so that the display on the front side can be observed. ing.

As such a backlift sheet, a so-called illumination sheet having a predetermined light transmittance is used, but if the display product (signboard etc.) is of large size or
Depending on the shape of the display product, it is necessary to join the edges of the illumination sheet to make it integral and continuous. In this case, the light transmittance of the joint is often different from that of the main body, resulting in, for example, dark areas or excessively bright areas, resulting in discontinuity in the illumination effect.

The present invention aims to provide a joined body of sheets for illumination and a joining method that do not cause discontinuity in the illumination effect.

[Means for Solving the Problems and Effects] The light-transmitting sheet assembly of the present invention comprises at least one light-transmitting light-transmitting sheet having at least two mutually joined end edges. and at least one adhesive filling member joining the edge portions, wherein the mutually bonded edge portions of the illumination sheet are butted against each other with a gap between them. wherein the adhesive filling member includes an adhesive tape having a light transmittance higher than that of the illumination sheet, and is formed on the adhesive tape and includes a solidified adhesive polymer resin material as a base material; and the light transmittance of the illumination sheet is 60
an adhesive solidified filler layer having a light transmittance of % to 140%, the adhesive tape is overlaid and adhered to at least one side of the illumination sheet joining edge abutting part, and The adhesive solidified filling layer is filled in the abutment gap of the joining edge of the illumination sheet, and
It is characterized in that the abutted edge portions of the illumination sheet and the adhesive tape are integrally joined.

The method for joining illumination sheets of the present invention includes, in order to join at least two end edges of at least one light-transmitting sheet to each other, the end edges of the illumination sheets to be joined are the parts are butted against each other, and an adhesive tape having a light transmittance higher than the light transmittance of the illumination sheet is overlaid on at least one side of the butted part,
A solidified adhesive polymer resin material is included as a base material in the gap between the edge parts of the illumination sheet in the abutting portion, and when it is solidified to the same thickness as the illumination sheet, the illumination A filling adhesive having a light transmittance of 60% to 140% of the light transmittance of the sheet for illumination is filled, and the filling layer of the filling adhesive is solidified, whereby the edge of the sheet for illumination and the adhesive The present invention is characterized in that it includes joining and integrating the tape and the adhesive solidified filler layer.

Another method for joining the illumination sheet of the present invention includes at least one
In order to join at least two end edges of the light-transmitting sheets for illumination to each other, the adhesive surface of an adhesive tape having a light transmittance higher than that of the sheet for illumination is applied. comprising a solidified adhesive polymeric resin material as a matrix;
and 60% to 140% of the light transmittance of the illumination sheet when solidified to the same thickness as the illumination sheet.
An adhesive filling member is prepared by applying a filling adhesive having a light transmittance of The edge portions of the electrical sheet to be joined are arranged on the member so that the adhesive solidified filling layer is filled between the edge portions, and the adhesive filling member and the electrical The present invention is characterized in that it includes joining and integrating the decorative sheet edge portion.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The illumination sheet joined body and joining method of the present invention will be described with reference to the accompanying drawings.

In the method of the present invention shown in FIGS. 1 and 2, the edge portions 1a and 1b of the illumination sheet are placed against each other on the adhesive tape 2 so as to face each other. At this time, the edge portions 1a and lb are arranged at appropriate intervals so as not to overlap each other. Although there is no particular limitation on the size of the gap 3 between the edge portion 1a and the gap 1b, it is generally preferably 1.5 fl or less, and even more preferably 0.5 fl or less. When the edge parts of the illumination sheets to be joined overlap each other, the light transmittance of the joined part is significantly reduced, a dark area is generated in the joined part, and the continuity of the illumination effect is impaired. In FIG. 2, this gap is filled with a filling adhesive, which is solidified to form a solidified filling layer 4. In FIG. As a result, the adhesive filling member 5 is formed by the adhesive tape 2 and the adhesive solidified filling N4.

Joining of the edge parts 1a and lb of the illumination sheet with adhesive tape (
Bonding) may be performed before the adhesive filling operation, or may be performed simultaneously with the solidification of the solidified filler layer. Adhesive tape joins by solidifying (hardening) the filling adhesive applied to the joint surface.
Alternatively, it may be performed by applying heat, ultrasound,
Alternatively, it may be melted and bonded by high frequency irradiation.

When the filler adhesive is filled into the gap at the edge of the illumination sheet, a portion of the filler adhesive infiltrates into the fiber sheet base fabric at the edge and hardens there, resulting in the so-called bonding process. It can have an anchoring effect.

In another joining method of the present invention shown in FIGS. 3 and 4, a solidified filling layer 4' of filling adhesive is previously formed on the adhesive surface of the adhesive tape 3 to create an adhesive filling member 5. .

The shape and dimensions of this filling layer 4' correspond to the shape and dimensions of the edge portion of the illumination sheet to be joined.

Next, as shown in FIG. 4, the edges 1a and lb of the illumination sheets to be joined are butted onto the adhesive surface of the adhesive tape 2 with the solidified filling layer 4' of the adhesive filling member 5 interposed therebetween. Deploy. Next, the adhesive filling member and the edge portion of the illumination sheet are joined and integrated. At this time, an adhesive tape may be attached to the opposite side of the adhesive surface to further increase the adhesive strength of the joint.

The illumination sheet used in the present invention may be of any type or configuration as long as it has sufficient light transmittance to exhibit an illumination effect and has a color and pattern for the illumination effect as desired. Although there is no limitation, it is generally preferable to have a light transmittance of 0.08% to 10%.

A sheet with a light transmittance higher than 10% may display colors and patterns clearly, but the light source may be visible through the sheet, resulting in a problem that the so-called "ANDON" effect is degraded. Further, when the light transmittance is lower than 0.08%, the surface of the illuminated product may be dark, the colors and patterns thereof may be unclear, and the illumination effect may be unsatisfactory.

The illumination sheet used in the present invention has a predetermined color, pattern, and light transmittance, and may be composed of a single polymer resin material sheet, or may be composed of two or more overlapping sheets. It may also be a composite of combined resin films or sheets. Alternatively, the illumination sheet may consist of a base fabric made of at least one fiber sheet and a polymer resin film layer laminated on the base fabric. This polymer resin membranous layer is
It may be formed on the surface of the base fabric, or may be placed between two or more base fabrics. The polymeric resin film layer may have the desired color and pattern and may also include a stain-resistant coating layer. Further, it is preferable that the polymer resin film layer has ultrasonic or high frequency adhesive properties and can be firmly bonded to the adhesive tape.

When polymer resin film layers are formed on both sides of a base fabric made of fiber sheets, the front side resin film layer has relatively low light transmittance, and the back side (light source side) resin film layer has relatively low light transmittance. Preferably, the layer has relatively high light transmission. Of course, both phase resin film-like layers may have the same type of light transmittance, or the light transmittance of the resin film-like layer on the back side may be lower than that of the resin film-like layer on the front side. obtain.

The base fabric made of a fiber sheet used in the illumination sheet of the present invention has appropriate light transmittance, and such a fiber material sheet may be colored (dyed) in a desired color or not. No natural fibers, such as cotton, linen, inorganic fibers, such as glass fibers, recycled fibers, such as viscose rayon, cupro, etc., semi-synthetic fibers, such as
and synthetic fibers, such as triacetate and triacetate fibers,
For example, at least one fiber selected from nylon 6, nylon 66, polyester (polyethylene terephthalate, etc.) fiber, aromatic polyamide fiber, aromatic polyester fiber, acrylic fiber, polyvinyl chloride fiber, polyolefin fiber, etc. is used. be able to. The fibers in the fibrous material sheet may be in any form such as short fiber spun yarn, long fiber yarn, split yarn, or tape yarn, and the fibrous material sheet may be a woven fabric, a dense fabric, a nonwoven fabric, or a composite fabric thereof. It may be either. In general, the fibers used for illumination sheets are preferably polyester fibers or glass fibers, and in view of their low elongation under stress, these fibers are preferably in the form of long fibers (filament 1-), and are plain woven. Preferably, it forms a cloth. The fiber material sheet is useful for maintaining the mechanical strength of the resulting illumination sheet at a high level.

In the illumination sheet used in the present invention, the front and back layer film materials may be laminated and bonded to each other via a fiber material sheet. Such fiber material sheets are 1-80%
It is preferable that it has a light transmittance of 3 to 7.
More preferably, it has a light transmittance of 0%. and,
Although an intermediate binding sheet may be included, it is preferable that the light transmittance of the illumination sheet including this intermediate binding sheet as a whole is 0.08 to 10%.

In the illumination sheet of the present invention, as the most preferable fiber material sheet, it is preferable to use a woven sheet with a special structure as described in Japanese Patent Publication No. 57-30381, but it is of course limited to this. It is not something that will be done.

The polymer film (or sheet) used as the laminated film-like material to be combined with the fiber sheet base fabric of the illumination sheet used in the present invention is generally formed from a flexible polymer resin. Such flexible polymer resins include natural rubber, neoprene rubber, chloroprene rubber, silicone rubber, fluoro rubber, Hypalon and other synthetic rubbers, or PV
C resin, ethylene-vinyl acetate copolymer (EVA) resin, acrylic resin, silicone resin, polyurethane resin, polyethylene (PE) resin, polypropylene (P
) Resin, polyester resin, fluororesin, and other synthetic resins can be used with or without coloring in a desired color. Such materials also have good waterproof properties and can provide the resulting laminated sheet with desired waterproof properties as well as flame retardancy and mechanical strength. The flexible polymer front and back layers have a thickness of 0.05n or more, more preferably 0.05 to 1
．． Preferably, it has a thickness of Oxvr.

These flexible polymer resin film materials can be prepared by known methods such as topping, calendering, coating, dipping, etc. using rubber or resin films, solutions, pastes, straights, etc. as described above. can be formed.

These rubbers or resins contain plasticizers, stabilizers, colorants, ultraviolet absorbers, and other functional agents such as flame retardants,
A flame retardant and the like may also be included.

The flexible polymer resin film-like material may be formed from a single layer of flexible polymer resin, but it also has an inner layer made of flexible resin and is formed on this inner layer, and has antifouling and antifouling properties. It may also include an outer layer made of a weather-resistant synthetic resin.

As the stain-resistant and weather-resistant synthetic resin for the outer layer, fluorine-containing resins and acrylic resins can be used. That is, the stain-proof and weather-resistant resin outer layer is formed by applying a fluorine-containing resin or an acrylic resin on the inner layer, or by adhering a film made of these resins.

The thickness of the fluorine-containing resin film (coating film) is preferably 0.
The thickness is about 0.01 to 0.5 microns, more preferably about 5 to 50 microns, but it can be made thicker or thinner as long as it achieves the objectives of weather resistance, antifouling properties, and durability. There are no particular limitations.

In addition, the fluorine-containing resin film may contain other resins such as MM.
There is no problem even if A and the like are used in combination, such as by mixing or pasting together, as long as the purpose of illumination is achieved. Commercially available fluorine-containing resin films used for illumination sheets include Tetra Film (Dupont Trademark), Afflex Film (Asahi Glass Trademark), and KFC Film (Ou Kagaku).

In the illumination sheet, it is preferable that a film-like fluorine-containing resin with a substantially smooth surface is adhered to the upper surface of the inner layer, but there is also a method of applying a fluorine-containing resin solution or emulsion. The fluorine-containing resin film used in the present invention preferably has a tensile strength of 100 kg/cd or more.

The stain-proof and weather-resistant resin outer layer used in the illumination sheet may be formed of polyacrylic resin. For this purpose, an acrylic resin film is generally used, but a method of applying an acrylic resin solution or emulsion onto the base layer and drying may also be used.

The acrylic resin film used in the present invention is 100k
g/cn! It is preferable to have a tensile strength of 1 or more.
Preferably, it has a weight of ~50 g/rd, preferably 3-30 g/m, or a thickness of 3 microns or more (usually 3-50 microns), more preferably 4-30 microns. . Such a film is adhered to the surface of the inner layer using an adhesive or otherwise affixed.

In the illumination sheet, the stain-proof and weather-resistant resin outer layer formed on the flexible resin inner layer is made of a polyvinylidene fluoride resin layer and an acrylic resin layer, in addition to the fluorine-containing resin and acrylic resin mentioned above. or a laminate of a polyvinylidene fluoride resin layer, an acrylic resin layer, and a polyvinyl chloride resin layer. In these laminates, the polyvinylidene fluoride resin layer has a thickness of 2 to 3 microns, the acrylic resin layer has a thickness of 2 to 4 microns, and
The thickness of the polyvinyl chloride resin layer is preferably 40 to 50 microns.

The adhesive tape used in the method of the present invention has a higher light transmittance than the sheet for illumination, and generally it is preferable to have a light transmittance of 15% or more, more preferably 20% or more, and 30% or more. % or more is even more preferable, and particularly transparent one is most preferable. Further, an adhesive resin layer or an adhesive resin layer may be formed on at least a portion of the adhesive surface.

Such high light transmittance adhesive tapes may be made of synthetic resin films or sheets, such as polyvinyl chloride resins, polyvinyl acetate resins, polyurethane resins, polyester resins, and polyamide resins. However, in order to maintain the strength of the joint at the same level as that of an illumination sheet, adhesive tapes generally consist of a base fabric made of a fiber sheet and a synthetic resin film formed on at least one side of the base fabric. or a sheet layer. The fiber sheet may be selected from the same fiber sheet as the fiber sheet for illumination sheets. In this case as well, the adhesive tape as a whole has a higher light transmittance than the illumination sheet, preferably 25% or more, and the light transmittance of the joint can be made as close to that of the illumination sheet as possible. It is necessary that

The filling adhesive used in the method of the present invention contains a solidified adhesive polymer resin as a base material, and when it is formed to the same thickness as the sheet for illumination to be used, One having a light transmittance of 60% to 140% of the light transmittance of the sheet, preferably one having a light transmittance of 60 to 120%, more preferably one having the same light transmittance as the sheet for illumination. is used.

The solidified adhesive polymer resin matrix component of such filler adhesives can be selected from polyvinyl chloride resins, polyvinyl acetate resins, polyurethane resins, polyester resins, polyamide resins, etc., and Pigments, dyes (eg, titanium dioxide, inorganic pigments, organic pigments), and other coloring agents may be included to define the light transmittance to a predetermined value. The filling adhesive may contain ultraviolet absorbers, antioxidants, fillers, flame retardants (eg, antimony trioxide and organic flame retardants), etc., as required.

The filling adhesive may be liquid (viscous) and may be flowed and filled into the gap between the edges of the butted illumination sheets, or the filling adhesive may be solid and may be filled. may be filled into the gap as an elongated continuous body having a shape and size corresponding to the gap. Furthermore, the filling adhesive may be powder, granules, or granules, which may be filled into the gap by an appropriate method.

〔Example〕

The present invention will be further explained by examples.

In the Examples below, the light transmittance of each sample and component was measured by the method described below.

1. Apparatus i) Using a plywood board with a thickness of 1.5 cm, the inner diameter is 51 cm.
A rectangular prism-shaped box measuring (height) x 27 cm (width) x 30 cm (back) was assembled.

(One of the sides of this box can be opened and closed freely, and there is no gap when closed.) ii) 27cmX
A 30 cm slit was made from a flat plywood sheet and attached to the box prepared in step i) at a position 10 cm above the bottom so as to be parallel to the top and bottom plates.

1ii) The slit made in ii) has 5 points in the center.
A square optical path (cutout) of cm x 5 cx is
The slit should be parallel to each side of the slit, and should not allow light to pass through it anywhere else.

iv) White lamp used as a light source (indoor eye lamp RS
A 100V 300W lamp (Iwasaki Electric Co., Ltd.) was attached and fixed from the top plate so that the distance from the tip of the lamp to the optical path of the slit was 21 cm.

■) Light sensing part (sensor) of illumination meter (4 Shiba IM-2D)
The central part of the light source was fixed so that it was on an extension of the straight line connecting the central part of the white lamp as the light source and the central part of the optical path.

(The height of the sensor part of the illuminance meter was 2.5 crn, so the distance from the optical path (slit) to the sensor part of the illuminance meter was 7.5 cm.)vi) As a light source A current variable device (SLIDAC) was inserted between the white lamp and the power source to adjust the amount of light from the lamp.

2. Test sample i) The test sample can be measured if it is larger than the optical path (5 cm x 5 cm). However, when placed on the optical path,
I used something as large as possible to prevent it from falling or shifting.

ii) The test sample was uniform in thickness and homogeneous at all parts.

3. Measurement method i) Turn on the power and gradually light the lamp using a current variable device.

ii) The illuminance when the white light emitted from the light source lamp passes through a 5cffl x 5C11 optical path and reaches the illumination meter without a measurement sample is 19.000 to 20.0.
A current variable device was used to set the current to between 001x and 001x.

iii > Illuminance is 19.000 to 20.0001 x
When the time comes, continue measuring the illuminance at that time three times.
Recorded. The allowable range of variation for three measurements is 1%.
If the variation was 1% or more, the measurement was repeated again to confirm that the light source was stable. The average value of three measurements was taken as a blank (Lo).

iv) After completing the blank measurement, the next sample to be measured was mounted in a flat state that completely covered the optical path above the slit and had no floats or walnuts.

At this time, which side of the sample, the front side or the back side, should be oriented toward the light source was selected in consideration of the intended use of the sample, and the appropriate side was selected for measurement.

(2) A sample was placed on the optical path, the light source light set as a blank was transmitted, and the illuminance when the transmitted light reached the illuminance meter was measured. The measurement was performed three times, and the variation was within 1%. If the variation was 1% or more, the measurement was repeated again. The average value of the three measurements is the measured value (L)
And so.

vi) Light transmittance (%) is measured value (L) blank (L)
It is expressed as a percentage of o).

■.

S1111 A polyester multifilament woven sheet (hereinafter referred to as base fabric (A)) having the following structure and the leno weave structure shown in FIG. 5 was manufactured.

M weave 1000d/192f/1xloooa/1
92f/11 lines/25.4mX11 lines/25.4m
In FIG. 5, a layer of warp yarns 6 with a number of threads arranged parallel to each other is laminated with a layer of weft yarns 7 with a number of threads arranged parallel to each other, and the warp threads 6 and the weft threads 7 are entangled with a leno thread 8. are combined. Warp 6
and weft 7 is 1000 d/192 f/1
The leno yarn 8 is made of 105d/12f/1 nylon 6 multifilament yarn.

The obtained base fabric is Gray fabric weight: 125 g/m Gray light transmittance: 42% It had

Next, polymer resin films (B) and (C) having the following two types of compositions to be attached to the base fabric (A) were prepared.

A red translucent film (C) is laminated on the surface of the base fabric (A), and a colorless transparent film (B) is laminated on the back side of the base fabric A, and these films (B) and (C ) was heat-pressed onto the base fabric (A) at 165°C.

A fluorine-containing resin film (Shon 1KFc film, manufactured by Ou Kagaku, thickness 50 tsumi) was further adhered onto the film (C) layer to obtain an illumination sheet.

This illumination sheet has a thickness of 0.651 m and a light transmittance of 3.
It had 4%.

B. 1'1' notice of the tape The colorless transparent film (B) described in Table 1 above is applied to the base fabric (A).
The resulting laminated sheet was slit to a width of 3 cm, and this was used as an adhesive tape.

This adhesive tape has a thickness of 0.65+n and a light transmittance of 34.
It had 2%.

c, the words of W. 'iA A pasty filling adhesive having the following composition was prepared.

Table 2 Note: *... Tetrahydrofuran, solvent The light transmittance of the solidified film (thickness 0.65 mm) of the filled adhesive obtained was 4.4% (sheet for illumination). 12 for the light transmittance of
9.4%).

This filled adhesive was filled into an extruded tube.

The edges of the two illumination sheets are butted against each other at a spacing of 1 crane, and adhesive tape is overlaid on this joint, which is then subjected to high-frequency stitching to adhere to the illumination sheets. The tapes were combined.

The obtained bonded body (D) was used as it was as a sheet for illumination to create an illuminated signboard, and when the internal light source was turned on in the dark, a linear glow was generated at the joint, and the illumination effect was A discontinuity occurred.

By the same operation as above, overlap the adhesive tape and the end edges of the illumination sheets that are butted against each other, extrude the filler adhesive from the extrusion tube into the gap between the end edges of the illumination sheets, and fill it. After drying at 80°C, this was subjected to high frequency suturing treatment to obtain a bonded body (E).

When the internal light source of the signboard manufactured using the obtained bonded body (E) was turned on, the brightness of the bonded part was almost the same as that of other parts, and no discontinuity in the illumination effect was observed. Ta.

Furthermore, the adhesive strength of the bonded portion was of a level that caused no practical problems. In addition, there were no practical problems in terms of the flexibility of the bonded parts of the bonded body (E), the strength of the filled and solidified filling layer against falling off by rubbing, the flame retardance, the weather resistance, and the like.

When an adhesive tape was further bonded by high-frequency stitching to the opposite side of the bonded part of the bonded body (E), the adhesive strength of the bonded part was further improved, and a good illumination effect was exhibited.

Implementation The same operations as in Example 1 were performed. However, due to the filler on the adhesive surface of the adhesive tape, a width of 1. An adhesive filling member was prepared by forming a Q*n+ filling layer, and the edge portions of the illumination sheets were butted together through the filling layer, and a high-frequency stitching operation was performed on them to join and integrate them.

The obtained joined body had the same performance as Example 1.

In addition, when the same operation as above was performed, except that adhesive was applied to the part of the adhesive surface of the adhesive tape where the filler layer was not formed, the butting and fixing operation of the edge of the illumination sheet was completed. It was done very easily.

The same operation as in Example 1 was performed. However, in the composition of the filler listed in Table 2, when the amount of titanium dioxide added was 2.0 parts by weight, the light transmittance of the obtained solidified film (thickness 0.65 mm) of the filled adhesive was as follows. It was 3.5% (103% of the light transmittance of the illumination sheet).

The signboard manufactured using the obtained bonded body was as good as Example 1 in terms of the brightness of the bonded part, adhesive strength, flexibility, and kneading strength.
It was the same.

Tip ↓ The same operation as in Example 1 was performed. However, in the filler composition listed in Table 2, when the amount of titanium dioxide added was 4.5 parts, the resulting solidified filler film (thickness 0
．． 65 m) was 2.4% (70.6% of the light transmittance of the illumination sheet).

The signboard manufactured using the obtained bonded body had no practical problems in terms of the brightness of the bonded parts, and was also satisfactory in terms of adhesive strength, flexibility, and kneading strength. Ta.

〔Effect of the invention〕

The illuminated sheet assembly of the present invention exhibits a uniform and beautiful illumination effect without causing any discontinuity in the illumination effect due to the joined parts. Further, the method for joining sheets for illumination of the present invention makes it possible to firmly join the edge portions of sheets for illumination by a simple operation, and the resulting joint has a brighter part than other parts. , or dark parts, etc.
There is no formation of discontinuous portions of the illumination effect, and therefore, the sheet joined body for illumination and the joining method of the present invention have extremely high practical utility.

[Brief explanation of the drawing]

1 and 2 are cross-sectional explanatory views for explaining the steps of an embodiment of the method for joining sheets for illumination according to the present invention, and FIGS. FIG. 5 is a cross-sectional explanatory view for explaining the steps of an embodiment of the illumination sheet joining method of the present invention, and FIG. 5 is a plan view showing an example of the fiber sheet base fabric in the illumination sheet used in the method of the present invention. It is a diagram. la, lb... edge of sheet for illumination, 2... adhesive tape, 3... gap, 4.4'... filling layer,
5... Adhesive filling member, 6... Warp,
7...Weft thread, 8... Leno thread.

Claims (1)

[Scope of Claims] 1. At least one light-transmissive illumination sheet having at least two end edges joined to each other; and at least one light-transmitting sheet having at least two end edges joined to each other. and an adhesive filling member, wherein the mutually joined end edges of the illumination sheet are butted against each other with a gap, and the adhesive filling member is arranged to fill the light of the illumination sheet. an adhesive tape having a light transmittance higher than the light transmittance; and an adhesive tape formed on the adhesive tape, comprising a solidified adhesive polymer resin material as a base material, and having a light transmittance of 60% to 60% of the light transmittance of the illumination sheet. a solidified filler layer of an adhesive having a light transmittance of 140%, the adhesive tape is overlapped and adhered to at least one side of the abutting portion of the joining edge of the illumination sheet,
and the adhesive solidified filler layer is filled in the abutment gap of the joined edge of the illumination sheet, and is integrally joined together with the abutted edge of the illumination sheet and the adhesive tape. , Sheet assembly for illumination. 2. The joined body according to claim 1, wherein the illumination sheet has a light transmittance of 0.08 to 10%. 3. The illumination sheet includes at least one base fabric layer made of a fiber material, and at least one resin layer laminated on the base fabric layer and made of a polymer resin material. The zygote according to claim 1. 4. The bonded body according to claim 1, wherein the adhesive tape has a light transmittance of 15% or more. 5. The bonded body according to claim 1 or 4, wherein the adhesive tape comprises a base fabric made of a fiber material and an ultrasonic, high frequency or thermal adhesive polymer resin layer formed on at least one surface thereof. 6. The bonded body according to claim 1, wherein the solidified adhesive polymer material has thermal, ultrasonic or high frequency adhesive properties. 7. In order to join at least two end edges of at least one light-transmitting sheet for illumination to each other, the end edges of the sheet for illumination to be joined are arranged so as to butt against each other, and An adhesive tape having a light transmittance higher than that of the illumination sheet is superimposed on at least one side of the abutting portion, and a solidified adhesive tape is placed in the gap between the edges of the illumination sheet at the abutment portion. Contains a combined resin material as a base material, and
It is filled with a filling adhesive that exhibits a light transmittance of 60% to 140% of the light transmittance of the illumination sheet when solidified to the same thickness as the illumination sheet, and the filling adhesive A method for joining a sheet for illumination, comprising: solidifying a filling layer of an adhesive, thereby joining and integrating the edge portion of the sheet for illumination, an adhesive tape, and the solidified adhesive filling layer. 8. In order to join at least two edge parts of at least one light-transmitting sheet for illumination to each other, an adhesive tape having a light transmittance higher than that of the sheet for illumination is used. Contains a solidified adhesive polymer resin material as a base material on the adhesive surface, and when it is solidified to the same thickness as the illumination sheet, 60% to 60% of the light transmittance of the illumination sheet. A filling adhesive exhibiting a light transmittance of 140% is applied so as to form a solidified filling layer having a shape and size corresponding to the edge portion of the illumination sheet to be joined to produce an adhesive filling member, and The edge portions of the illumination sheet to be joined are butt-arranged on the adhesive filling member so that the adhesive solidified filling layer of the adhesive filling member is filled between the edge portions, and A method for joining an illumination sheet, comprising: joining and integrating an adhesive filling member and an edge portion of the illumination sheet.