JP3020587U - Display panel base plate and display photo panel using the same - Google Patents

Abstract

(57) [Summary] [Purpose] Blisters, or bubbles (blister), on the surface of photographs, posters, etc. attached to the base plate with the adhesive 2 attached.
Provide a base plate that does not generate [Structure] On one surface of a plastic foam plate 1 having a skin layer 4, a large number of parallel lines of permanent adhesive type pressure-sensitive adhesive 2 are attached and covered with a release paper 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a base plate used when an exhibition panel is created by pasting photographs and posters for exhibition.

[0002]

[Prior art]

 Conventionally, as a base plate for pasting photographs and posters for exhibition, there is a base plate made of a hard plastic foam plate or a veneer plate to which an adhesive (also referred to as “pressure-sensitive adhesive”) is applied. Of these, those using a hard plastic foam plate as a base material have become popular in recent years because of their light weight and ease of processing.

[0003]

[Problems to be solved by the device]

 By the way, an exhibition panel with photographs and posters for exhibition attached to the base plate is used for exhibitions at photo exhibitions and contests, large posters for advertising and advertisements, various event guides, and personal hobbies such as interiors. It is required that photos and posters be neatly attached. Therefore, when attaching photos or posters to the base plate, it is necessary to pay close attention not to entrap air in the adhesive and to prevent misalignment of the photos or posters due to misalignment. However, there was a problem that attachment required skill.

[0006] Furthermore, although it is not noticeable immediately after a photograph, poster, etc. is pasted on the base plate, after a while, "blister", that is, a bubble (blister) is generated on the surface of the pasted photograph, poster, etc., There were occasions when the aesthetic appearance of the exhibit was compromised. The occurrence of “blister” is a phenomenon that is often seen especially in large-sized photographs (printing paper), but large-sized photographs (printing paper) are expensive, and a base plate that does not cause such “blisters” Was strongly desired by photographers and poster creators.

In Japanese Patent Publication No. 50-23706, the area of surface paper (corresponding to "photograph, poster, etc." in the present specification) is changed by leaving it in a humid place or a dry place for a long time. There is a problem that expansion and contraction stress is generated, which causes unevenness and wrinkles on the surface. In the invention of Japanese Examined Patent Publication No. 50-23706, it is proposed that a special cross-linking component is contained in the pressure-sensitive adhesive in order to solve the above problems.

However, the “blister” in the present specification is a foreign substance which cannot be solved by including a crosslinking component in the pressure-sensitive adhesive as described above.

Regarding the cause of the occurrence of “blister”, the present inventors consider that one or more of the following several are combined.

The adhesive is sufficiently stirred before being attached to the base material, and it is envisioned that fine air is carried into the adhesive and diffused during the stirring. Such fine air particles gradually separate from the adhesive and agglomerate into large particles, but they are not discharged to the outside due to the high gas-shielding properties of photographic printing paper and high-quality art paper used for posters. Therefore, if there is a weak adhesive portion on the adhesive surface attached to the entire surface, air will collect there and cause blister.

It is envisioned that the solvent or water used to disperse the pressure sensitive adhesive will remain if the pressure sensitive adhesive is not sufficiently dried after attachment to the substrate. Alternatively, it is supposed that unreacted monomers and oligomers remain in the polymer that is the main component of the adhesive. These materials gradually evaporate, but due to the high gas-shielding properties of photographic printing paper and high-quality art paper used for posters, they are not emitted outside. Therefore, if there is a weak adhesive portion on the adhesive surface attached to the entire surface, volatile matter will collect there and cause blister.

A foaming agent is used when molding a plastic foam plate. When this plastic foam plate is used as the base material, the foaming gas existing in the cells gradually leaks out of the base material. Similar to the above, this is not discharged outside due to the high gas shielding property of high-grade art paper used for photographic printing paper and posters, and if there is a weak adhesive part of the adhesive surface attached to the whole surface, The foaming gas gathers there and causes "blister".

Air that is brought in when a photograph, a poster, or the like is attached to the base plate gathers to cause “blister”.

As a result of analyzing the gas in the “blister” by gas chromatography, the present inventors have confirmed that the gas component is mostly air, and suppose the above is the main cause.

The present invention has been made in view of such conventional problems, and achieves the following objects.

(1) To provide a base plate which does not generate “blister”, that is, air bubbles (blister) on the surface of a photograph, a poster, or the like attached to a base plate provided with an adhesive.

(2) To provide a base plate that can be attached to the base plate with less attention than before in the work of attaching the base plate without entrapping air in the adhesive.

(3) To provide a base plate that can be more easily corrected than before when a misalignment such as a photograph or a poster occurs due to a positioning error.

(4) To provide a base plate in which affixed photographs, posters, etc. are stably attached to the base plate for a long time and are not peeled off or wrinkled with the passage of time.

[0018]

[Means for Solving the Problems]

 Therefore, in the invention of claim 1, as shown in FIGS. 1 and 2, for the exhibition panel, the adhesive 2 and the release paper 3 covering the adhesive 2 are provided on the surface of the plastic foam plate 1. In the base plate, the plastic foam plate 1 is an extruded polystyrene foam plate having a thickness of 3 mm to 10 mm and a skin layer 4 formed on the surface thereof, and the permanent adhesive type pressure-sensitive adhesive 2 is formed on the surface of the skin layer 4 in parallel lines. It is used as a base plate for display panels attached in a shape.

The present invention will be further described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a plastic foam plate as a base material, and it is necessary to be an extruded foam polystyrene plate having a thickness of 3 mm to 10 mm from the viewpoint of lightness, workability and rigidity. . The extruded expanded polystyrene plate preferably has a density of 20 to 200 kg / m ³ . If the density is too low, the rigidity of the base material tends to be insufficient, and if the density is too high, the weight increases and it becomes difficult to handle, and the material becomes uneconomical.

The surface of the plastic foam plate 1 is required to be as smooth as possible for displaying photographs, posters and the like. In order to meet such requirements, it is necessary that the plastic foam plate 1 has a skin layer 4 formed on the surface, and the surface roughness obtained by an optical displacement sensor is 0.5 mm or less. Is preferred. More preferably 0. It is 2 mm or less. The skin layer 4 is a smooth layer formed on the surface of the plastic foam plate 1 by extrusion foaming and having a higher density than the inside.

The above-mentioned optical displacement sensor is a device that irradiates light onto the surface of the object to be measured and receives reflected light while moving at a constant speed while maintaining a constant distance from the surface of the object to be measured. By utilizing the fact that the unevenness of the surface of the measured object is proportional to the reflectance of light, the surface roughness can be obtained from the reflectance of the light that is converted into an electrical signal and output to the recorder. Of.

The surface roughness of the plastic foam plate 1 in the present invention is obtained as the difference between the upper and lower sides of the wave by moving the optical displacement sensor in the width direction with respect to the extrusion direction, reading the maximum and minimum values of the wave from the chart of the recorder. It is a value that can be.

The adhesive 2 is a permanent adhesive type and has a strong adhesive force to high-quality art paper used for photographic printing paper and posters, and has an adhesive strength stronger than the layer cracking strength of normal photographic paper and high-quality art paper. Is obtained. However, the fact that such a strong adhesive force is exerted immediately after sticking on the contrary makes it difficult to stick the photo or poster to the base plate. It is preferable that it has removability. That is, it is preferable that the adhesive force or the adhesive force is improved by gradually advancing the familiarity of the adhesive 2 to the back surface of the printing paper or the high-quality art paper with the passage of time.

The specific composition of the pressure-sensitive adhesive 2 is not particularly limited, but the pressure-sensitive adhesive 2 used in the present invention is preferably one mainly composed of an acrylic ester-based polymer, which may be a solvent type or an emulsion type. Can be used. Particularly, in the present invention, as will be described later, since the adhesive 2 is attached in a large number of parallel lines leaving the non-attached portion, the initial adhesive force is 0.3 to 1.2 kg / 50 mm. Can be easily obtained. It can be easily peeled off at around 0.8 kg / 50 mm in a normal sticking operation. In addition, the adhesive strength can be improved with the passage of time after sticking a photograph, poster, etc., and the adhesive strength of 1.5 to 4 kg / 50 mm can be stably provided to prevent re-peeling. . In this specification, such a state is referred to as permanent adhesive attachment.

On the surface of the plastic foam plate 1, the adhesive 2 is attached in a number of parallel lines with the non-attached portion left. That is, since the adhesive 2 is not attached to the entire surface of the base material 1 but is attached to a large number of parallel lines, the portions of the adhesive 2 and the non-attached portions are alternately located. . Each non-attached part communicates with the edge of the plastic foam plate 1 and constitutes a passage or area through which air or gas separated from the adhesive 2 escapes.

The line width ratio between the attached portion and the non-attached portion of the adhesive 2 attached in parallel lines is preferably about 2: 1 to 1: 2, and the line width of the attached portion of the adhesive 2 is 0.5-2.0 mm, especially around 1.0 mm is preferred.

The plastic foam plate 1 is often charged with static electricity when left unattended, and when it absorbs dust in the air, the back surface and the end surface of the base plate become black and dirty. In order to prevent this, an antistatic agent (often containing a surfactant as a main component) is applied to the back surface of the base plate, that is, the surface opposite to the surface to which the adhesive 2 is attached and the end surface. It is preferable.

The adhesive 2 can be attached to the plastic foam plate 1 by a gravure roll type rotary applicator or a roll coater. The coating pattern of the adhesive 2 on the roll is grooved, the adhesive 2 is scraped off the surface of the roll to leave the adhesive 2 only in the groove, and by transferring this, the adhesive is formed in a fixed pattern. 2 can be attached.

Incidentally, reference numeral 3 in FIG. 1 denotes a release paper which covers the attachment surface of the adhesive 2.

[0031]

[Action]

 When a photograph or poster is attached to the surface of the base plate, the adhesive 2 is attached to the surface of the base plate in a number of parallel lines, leaving the non-attached part, and each non-attached part is a plastic foam plate. Since it is connected to the edge of No. 1, the non-attached portion serves as an air passage, and the enclosed air is discharged outside without staying.

Although the positions of photographs, posters, etc. may be displaced with respect to the base plate, the initial adhesive force of the adhesive 2 attached in a large number of parallel lines is weak. It's easy. That is, the adhesive 2 is not attached to the entire surface of the plastic foam plate 1, but the attached portions of the adhesive 2 are alternately located with the non-attached portions. Weak and removable.

However, with the passage of time, the familiarity of the adhesive 2 gradually progresses to the back surface of the printing paper or high-quality art paper, which is the adherend, and the adhesive strength or adhesive strength is improved. As a result, permanent bonding between the base plate and the adherend is realized.

With the passage of time, fine air particles gradually separate from the adhesive 2 and condense into large particles. Alternatively, the residual solvent, unreacted monomer, and foaming gas gradually volatilize and separate from the adhesive 2. The non-attached portion of the adhesive 2 is a region where air or gas separated from the adhesive 2 escapes. Each non-attached portion communicating with the edge of the plastic foam plate 1 serves as a passage for letting air or gas separated from the adhesive 2 escape to the outside of the base plate.

As the photographic printing paper for the adherend and the art paper for the poster, chrysanthemum (636 × 639) and fourty-six (788 × 1091) can be used.

By the way, for example, Japanese Utility Model Publication No. 47-35863 discloses a photo storage album, “A pressure-sensitive adhesive is applied to the surface of a thick substrate, and the upper surface of the thick substrate is freely attached and detached with a transparent film. A base plate for storage of photographs etc. characterized in that a pressure-sensitive adhesive is provided on the diagonal stripes.

However, it is essential that the pressure-sensitive adhesive used in such a photo storage album has removability. That is, it is required as a basic property that the adhesive force or adhesive force of the pressure-sensitive adhesive to the transparent film is smaller than the cohesive force of the pressure-sensitive adhesive itself for a long time. Furthermore, the adhesive strength or adhesive force of the removable adhesive should not be stronger than the delamination strength of the photographic printing paper to be stored. This removability is an essential requirement for repeatedly attaching and peeling the transparent film to the album mount.

In the above-mentioned publication, the provision of the pressure-sensitive adhesive in a linear shape is intended mainly for the ease of peeling the transparent film. In addition, Japanese Utility Model Application Laid-Open No. 1-89176 also has the first object of the ease of repeated peeling of the transparent film in the photo storage album. It is important for the removable adhesive to maintain weak adhesiveness for a long period of time.

On the other hand, the pressure-sensitive adhesive 2 used in the present invention is a permanent adhesive type, and is not for repeatedly sticking or peeling photographic printing paper or posters. Permanent adhesive type adhesives have strong adhesion to high-quality art paper used for photographic printing paper and posters, and this adhesion is usually stronger than the layer cracking strength of photographic paper and high-quality art paper.

For this reason, the technique used for the photo album is basically different from the present invention in its purpose and problem to be solved and also in the action.

[0041]

【Example】

Example 1 A base plate as shown in FIGS. 1 and 2 was prepared by using a polystyrene extruded foam plate having a thickness of 7 mm and a density of about 100 kg / m ³ as a base material. As the adhesive, an acrylic emulsion type adhesive was used, and it was attached in a number of parallel line patterns. The width of the adhesive was 1 mm, the ratio of the width of the attached portion of the adhesive to the width of the non-attached portion 3 was 1: 1 and the amount of the attached adhesive was about 25 g / m ² (dry).

With respect to the obtained base plate, the initial adhesive force and the final adhesive force with respect to the following printing paper were measured and found to be about 0.8 kg / 50 mm and 1.5 to 4 kg / 50 mm, respectively.

Further, as an adherend, a 760 × 1080 mm (all B size) photograph (printing paper: Fuji bromide WPFM3) and foreign paper (art paper: 100 g / m ² ) were used, and the sticking workability and sticking were performed. I investigated the stability when exhibited later.

The results are shown in Table 1.

Comparative Example 1 A base plate was prepared in the same manner as in Example 1 except that an adhesive was attached to the entire surface of one side of a polystyrene extruded foam plate at about 40 g / m ² (dry).

With respect to the obtained base plate, the initial adhesive strength of the printing paper was measured and found to be about 4 to 5 kg / 50 mm.

Further, using an adherend similar to that of Example 1, the workability of application and the stability when exhibited after application were examined under the same environment as Example 1.

The results are shown in Table 1.

Comparative Example 2 A base plate was prepared in the same manner as in Example 1 except that an acrylic rubber solvent type pressure-sensitive adhesive was attached to the entire surface of one side of a polystyrene extruded foam plate at about 30 g / m ² (dry). .

With respect to the obtained base plate, the initial adhesive strength of the printing paper was measured and found to be about 5 to 6 kg / 50 mm.

Further, using an adherend similar to that of Example 1, the workability of application and the stability when exhibited after application were examined under the same environment as Example 1.

The results are shown in Table 1.

[0053]

[Table 1]

[0054]

[Effect of device]

 The present invention is as described above, and has the following effects.

(1) Since the occurrence of “blister” on the surface of a photo or a poster attached to the base plate is drastically reduced, it is possible to attach even an expensive photo at ease.

(2) In the work of sticking to the base plate, it is possible to stick a photograph, poster, etc. so as not to hold the air with less attention than before, and it does not require a high degree of skill, so even beginners can do it. Easy to handle.

(3) Even when a misalignment such as a photograph or a poster occurs due to misalignment, the misalignment can be corrected more easily than before, and the number of failures can be reduced.

(4) The attached photos, posters, etc. are stably attached to the base plate for a long time, and are not peeled off or wrinkled with the passage of time, and the entire warp is reduced. be able to.

(5) Since the expansion / contraction stress caused by the change in temperature and humidity is evenly diffused, the irregularities generated on the surface of photographs, posters, etc. are not seen. Therefore, it is not necessary to use the special cross-linking agent described in the prior art.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a base plate according to the present invention.

FIG. 2 is a partially enlarged view of FIG.

[Explanation of symbols]

 1 Plastic foam board 2 Adhesive 3 Release paper 4 Skin layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideo Ogura 2-24 Higashi-Shinagawa, Shinagawa-ku, Tokyo Dow Kako Co., Ltd.

Claims (4)

[Scope of utility model registration request] 1. A display panel base plate having a surface of a plastic foam plate provided with an adhesive and a release paper covering the adhesive, the plastic foam plate having a skin layer formed on the surface of a thickness of 3 mm to A base plate for an exhibition panel, which is a 10 mm extruded expanded polystyrene plate, and a permanent adhesive type adhesive is attached to the skin layer surface in a number of parallel lines. 2. On the attachment surface of the permanent adhesive type pressure-sensitive adhesive,
The display panel stand according to claim 1, wherein the line width ratio between the attached portion and the non-attached portion is approximately 2: 1 to 1: 2, and the line width of the attached portion is 0.5 mm to 2.0 mm. Board. 3. An exhibition photographic panel, characterized in that the release paper on the display panel base plate of claim 1 is peeled off, and a photograph is pasted on the adhesive attachment surface of a permanent adhesive type adhesive. 4. The display photographic panel according to claim 3, wherein an antistatic agent is attached to the back surface of the plastic foam plate.