JPH10147076A - Mounting sheet for album - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a mounting sheet for an album having no deformation due to changes of temperature and humidity and no discoloring even when it is exposed to solar light. SOLUTION: A base plate 2 laminated with two polystyrene sheets each containing ultraviolet scatterer is formed with an adhesive layer 3 containing light stabilizer, coated with the layer 3, and mounted with a protective film 4 made of biaxially oriented polypropylene in a doubled state. The polystyrene and the polypropylene are scarcely affected by temperature and humidity, and have similar properties to the temperature and humidity. Accordingly, the mounting sheet for an album is not deformed and not discolored in a normal using state and can preserve a photograph and the like for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an album mount for sandwiching and preserving a photograph or the like between a substrate and a protective film. The present invention relates to an album mount capable of storing photos and the like in a state.

[0002]

2. Description of the Related Art As a mount for an album, a protective film consisting of a substrate coated with a pressure-sensitive adhesive on both sides and a transparent plastic film detachably mounted on the surface coated with the pressure-sensitive adhesive. Are commercially available and widely used. As such a board for the album mount, cardboard is generally used because it is inexpensive and easy to process.

[0003]

When cardboard is used as the substrate of the above-mentioned album mount, it may be left in a high-temperature place exposed to direct sunlight, for example.
When the storage state is poor, such as when the storage sheet is left in a high humidity place, a problem may occur that the mount is deformed in a short period of time. Even in the normal storage state, the same problem may occur after a long period of time.
Such problems are mainly due to differences in physical properties between cardboard and plastic films. That is, the thick paper shrinks due to the rise in temperature, but the plastic film expands conversely, and the thick paper grows due to the rise in humidity, but the plastic film hardly changes. The repetition of such shape and dimensional changes causes deformations such as wrinkles and curls on the surfaces of the cardboard and the plastic film. Further, when the cardboard and the pressure-sensitive adhesive are exposed to sunlight, discoloration such as yellowing is mainly caused, and the appearance is impaired. This discoloration also causes a problem that the adhesive strength of the pressure-sensitive adhesive is also reduced.

[0004] When such problems such as deformation and discoloration occur, not only does the beauty of the album itself deteriorate, but the photograph itself is deformed, and the album is no longer used.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended for an album capable of preserving a photograph or the like in a good condition for a long period of time without deformation or discoloration of the mount due to environmental changes. It is intended to provide a mount.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method of bonding a substrate to which a plurality of plastic sheets containing an ultraviolet scattering agent are adhered, and an adhesive formed on the surface of the substrate with an adhesive containing a light stabilizer. The agent layer and the adhesive layer surface are coated, and a part of both surfaces near the end of the substrate opposite to the binding portion is attached so as to be non-adhesive with the connection portion of the plastic sheet on the opposite binding portion side, The present invention provides an album mount, wherein the adhesive layer has a protective film attached so as to be detachable. The present invention also provides the above-mentioned album mount, wherein the plastic sheet constituting the substrate is a polystyrene sheet. The present invention also provides the two album mounts, wherein the plastic sheet constituting the substrate is a foamed plastic sheet. The present invention also provides the above-mentioned album mount, wherein the adhesive layer surface is formed so as to be smooth with the surface of the substrate on which the adhesive layer is not formed. Further, the present invention provides the above-mentioned album mount, wherein the protective film is biaxially oriented polypropylene.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An album mount according to the present invention will be described below with reference to FIGS. FIG. 1 is a plan view showing a state in which the protective film of the mount for the album is partially turned over. For convenience of drawing, the adhesive layer is indicated by a solid line, and the portions that can be seen through the protective film are omitted. . FIG. 2 shows II-I in FIG.
FIG. 3 is a cross-sectional view taken along the line I, and the display of the adhesive layer is simplified for convenience of drawing and easy understanding. FIG.
4 is a partial cross-sectional view of a modified form of the album mount, and FIG. 5 is a schematic view for explaining a method of manufacturing the album mount.

As shown in FIGS. 1 and 2, an album mount 1 comprises a substrate 2 and an adhesive layer 3 formed on the surface of the substrate 2.
And a protective film 4 attached so as to cover the adhesive layer 3.

The substrate 2 has a plurality of, preferably two, plastic sheets 2a and 2b bonded together with an adhesive. A structure in which a plurality of plastic sheets are bonded to each other is preferable because mechanical strength can be increased as compared with a single plastic sheet having the same thickness.

[0010] The constituent material of the plastic sheet is not particularly limited, but in order to achieve the object of the present invention, a material having a small hygroscopicity and a small deformation due to high temperature is preferable. An example of such a plastic sheet is a polystyrene sheet. As the plastic sheet, a foamed plastic sheet, for example, a sheet made of polystyrene foam can be used to reduce the weight of the album itself.

The plastic sheets 2a and 2b contain an ultraviolet scattering agent. When the ultraviolet light scattering agent is contained in this way, in addition to the effect of preventing discoloration of the substrate 2 due to ultraviolet light, fine irregularities are formed on the surface of the substrate 2, thereby facilitating the formation of the adhesive layer 3. Also, an additional effect of increasing the bonding force can be obtained. Examples of such an ultraviolet scattering agent include white pigments such as titanium dioxide and zinc oxide.

The plastic sheets 2a and 2b can be obtained by blending a predetermined amount of an ultraviolet scattering agent with the raw material plastic and extruding the mixture by a conventional method. In this case, the blending amount of the ultraviolet light scattering agent depends on the amount of plastic
About 5 to 10 parts by weight per 0 parts by weight is preferred.

A binding portion 5 for detachably attaching to the album body is formed at one end of the substrate 2 in the width direction (a direction indicated by an arrow in FIG. 1). The structure of the binding portion 5 is not particularly limited, and may be the same as that of a general commercial product. For example, one end of the substrate 2 may be directly or perforated to form the binding portion 5,
As shown in FIGS. 1 and 2, the binding plate 10 and the substrate 2 are
A structure in which the films 11a and 11b are connected to each other may be employed. Reference numeral 6 denotes a hole for detachably attaching to the album main body. Needless to say, it should be provided as necessary depending on the binding structure of the album. In addition, a notch 13 can be formed in the substrate 2 in order to easily peel off the protective film 4 when using the album.

The adhesive layer 3 is a portion that becomes a sticking surface for a photograph or the like when used, and is formed on the surface of the substrate 2.
The state of formation of the adhesive layer 3 is not particularly limited. For example, as shown in FIG. 1, the adhesive layer 3 can be formed by applying an adhesive in a plurality of oblique lines at substantially equal intervals.

As a modification of the adhesive layer 3, as shown in FIGS. 3 and 4, plastic sheets 2 a and 2
It is also possible to form an adhesive layer 3 'by piercing or forming a recess in b, and filling the hole or the recess with an adhesive. With such a structure, the surface of the adhesive layer 3 ′ and the surface of the substrate 2 on which the adhesive layer 3 ′ is not formed can be smoothed. Compared to the case where the agent layer 3 is used, it is preferable in that the line of the adhesive due to being pressed from above during use is less likely to adhere to the back side of the photograph.

As the adhesive used for forming the adhesive layer 3, a general rubber-based or acrylic polymer-based pressure-sensitive adhesive can be used. Some of them also have styrene-butadiene rubber-based adhesives having unsaturated bonds. It is easy to discolor. Therefore, in order to prevent such a problem, a light stabilizer is added to the adhesive.

Examples of the light stabilizer used in the present invention include amines, phenol derivatives, and triazine derivatives which act as antioxidants against oxidative deterioration due to ultraviolet rays. Other light stabilizers include ultraviolet absorbers such as benzophenone derivatives and salicylic acid derivatives. The amount of the light stabilizer is 100
About 2 to 3 parts by weight per part by weight is preferred.

The protective film 4 covers the adhesive layer 3 on the substrate 2 with a two-folded film so that the stopper portions 1 on both sides near the end of the substrate 2 on the side opposite to the binding portion are provided.
At 5, it is attached by an adhesive 16. The adhesive strength of the stopper portion 15 is higher than the adhesive strength of the adhesive layer 3 and may be an adhesive strength that does not peel off in conjunction with the operation of peeling off the protective film 4 during normal album use. Further, a light stabilizer can also be contained in the adhesive for attaching the stopper 15.

The protective film 4 is attached so as not to adhere to the connecting portion 17 of the plastic sheets 2a and 2b on the side opposite to the binding portion. By making it non-adhesive in this way, the tension applied to the protective film 4 due to a slight displacement between the plastic sheets 2a and 2b that occurs when the backing paper 1 is opened and closed during use can be absorbed and dispersed. The film 4 can be prevented from breaking. Therefore, the term “non-adhesive” as used herein means that the protective film 17 and the connecting portion 17 are not integrated by an adhesive or the like, and the protective film 17 and the connecting portion 17 are substantially integrated by pressing force. In this case, the protective film 17 and the connecting portion 17 may be in gradual contact with each other, or as shown in FIG. Small gap 1
8 may be provided. Protective film 4
Is attached to the adhesive layer 3 so that it can be attached and detached from the binding portion 5 side.

As a constituent material of the protective film 4, a material having a small hygroscopicity and a small deformation due to a high temperature is preferable similarly to the plastic sheet, and further, a material having the same or similar properties as the plastic sheet is preferable. . As such a protective film, polypropylene is preferable because deformation due to the above factors is small,
Particularly, biaxially oriented polypropylene is preferable.

[0021]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

Example 1 An album mount was produced by the following method. Its manufacture
The method will be described with reference to FIG. The board is composed
200 μm thick diacid as a plastic sheet
2 polystyrene sheets containing 5 to 10% by weight of titanium oxide
Using. This polystyrene sheet (including titanium dioxide
If no), specific gravity 1.1, softening point 95 ° C, water absorption
Rate 0.005% or less (24 hours, 23 ° C), thermal expansion coefficient 1
1 × 10 ^-Fivecm / cm / ° C was used. Also, the protective fill
The thickness is 60 μm, and the water absorption is 0.04 to 0.06.
% (24hr, 23 ° C), coefficient of hygroscopic expansion 0.1 × 10^-Fivecm
/ cm /% RH, coefficient of thermal expansion 11 × 10^-FiveBiaxial stretching of cm / cm / ℃
A polypropylene film was used. First, biaxially stretched poly
Amine light stabilizer on one side on propylene film 4
(Trade name: DX104, manufactured by Dainippon Ink and Chemicals) 2-3 weight
% Of the adhesive layer 3 (containing acrylic polymer and synthetic rubber)
Mixed type pressure sensitive adhesive; trade name C-7, Happy Trading Company
Is formed, and the adhesive 16 for the stopper 15 is further formed.
(Synthetic rubber adhesive; trade name G-15, Happy Trading Company
Made of acrylic) on the other side
Mer-type adhesive; trade name BP-860, meanwhile Yushi
Plastic sheets 2a, 2b coated with
After placing them at appropriate intervals, press them together to bond them.
You. Next, fold back in the direction of the arrow in the figure, press
The plastic sheets 2a and 2b are integrated into a substrate 2
Was. Thereafter, the binding portion 5 is attached, and as shown in FIGS.
I got the mount for the album.

The thus-obtained album mount was left to stand, the adhesive was sufficiently dried, and the stability in a constant temperature and humidity atmosphere was tested. The size of the album mount was 325 × 315 cm. In addition, an album mount manufactured in the same manner using cardboard having the same dimensions and a thickness of 400 μm (water content: 8%) was tested as a comparative example. The test was carried out for one week in an atmosphere of 35 ° C. and 30% (Test Example 1) and in an atmosphere of 25 ° C. and 90%.
The shrinkage (%), the elongation (%), and the dimensional change of each of the substrate and the protective film when left for a week (Test Example 2) were measured, and the change in appearance was visually observed. The results are shown in Tables 1 and 2.

[0024]

[Table 1]

As is clear from Table 1, the album mount of the present invention did not change at all even when left in a high temperature atmosphere corresponding to the daytime in summer. This is because both the polystyrene of the substrate and the biaxially oriented polypropylene of the protective film have the property that there is almost no change with temperature, and the properties for both temperatures are similar. On the other hand, in the mount for the album of the comparative example, since the cardboard used as the substrate was entirely shrunk and deformed, wrinkles were generated on the protective film and the appearance was obviously impaired, making the album unsuitable for practical use.

[0026]

[Table 2]

As is clear from Table 2, the album mount of the present invention did not change at all even when left in a high humidity atmosphere corresponding to the daytime in summer. This is because both the polystyrene of the substrate and the biaxially oriented polypropylene of the protective film have the property that there is almost no change due to humidity, and the properties for both humidity are similar. On the other hand, in the album mount of the comparative example, since the cardboard used as the substrate expanded and deformed in one direction, the protective film did not change, but the appearance was obviously impaired, making the album unsuitable for practical use.

Further, as is clear from the results shown in Tables 1 and 2, it was confirmed that the album mount of the present invention did not deform even when left in a high-temperature and high-humidity atmosphere. Also, the album mount of the present invention hardly discolors in a normal use state, and in a severe condition, for example, in the summertime when the conventional album mount using a cardboard as a substrate easily discolors. No discoloration was observed even when left under the conditions corresponding to daytime.

[0029]

The album mount of the present invention uses a material which is hardly affected by temperature and humidity in a normal use environment as a material of the substrate and the protective film. It does not occur and there is no dimensional change. Further, since the substrate contains an ultraviolet scattering agent and the adhesive layer contains a light stabilizer, no discoloration occurs even when exposed to sunlight in a normal use state. For this reason, objects to be stored, such as photographs, cutouts, and stamps, can be stored in a good state for a long period of time.

[Brief description of the drawings]

FIG. 1 is a plan view of an album mount.

FIG. 2 is a cross-sectional view of the album mount shown in FIG. 1, taken along the line II-II.

FIG. 3 is a partial sectional view of a modified embodiment of the album mount shown in FIG. 1;

FIG. 4 is a partial sectional view of a modified embodiment of the album mount shown in FIG. 1;

FIG. 5 is a diagram for explaining a method of manufacturing an album mount.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Album mount 2 Substrate 2a Plastic sheet 2b Plastic sheet 3 Adhesive layer 4 Protective film 5 Binding part 15 Stopper part

Claims (5)

[Claims] 1. A substrate on which a plurality of plastic sheets containing an ultraviolet scattering agent are adhered, an adhesive layer formed on the substrate surface with an adhesive containing a light stabilizer,
The adhesive layer covers the surface of the adhesive layer, and is adhered so as to be non-adhesive with the connection portion of the plastic sheet on the side opposite to the binding portion at a part of both surfaces near the end of the substrate opposite to the binding portion. And a protective film attached so as to be detachable. 2. The album mount according to claim 1, wherein the plastic sheet constituting the substrate is a polystyrene sheet. 3. The album mount according to claim 1, wherein the plastic sheet constituting the substrate is a foamed plastic sheet. 4. An adhesive layer surface is formed so as to be smooth with a substrate surface on which no adhesive layer is formed.
The mount for the described album. 5. The album mount according to claim 1, wherein the protective film is biaxially oriented polypropylene.