JP2007249119A - Sealing member and book with sealing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing member that exhibits predetermined sealing properties and is hardly opened upon selling a book but that can be safely and easily peeled off upon opening and that has a base material and a pressure-sensitive adhesive easily separated from the book upon recycling, and to provide a book with the sealing member. <P>SOLUTION: The sealing member to seal a fore edge of a book and the book with a sealing member using the above member are characterized in that the sealing member comprises a base material having a specific gravity of 0.97 or less and a pressure-sensitive adhesive comprising a water-soluble pressure-sensitive adhesive or an alkali-soluble pressure-sensitive adhesive. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sealing member and a book with a sealing member, and more particularly to a sealing member and a book with a sealing member that are excellent in usability and recyclability.

In recent years, books such as magazines and books are browsed in bookstores and convenience stores, and as a result, there is a problem that the books are damaged and the product value is lowered.
Moreover, it is a big problem because harmful magazines are freely read by youth unconditionally. For this reason, local governments have been moving to legislate the revision of the Youth Healthy Development Ordinance, etc., so that youths can not browse unhealthy magazines.
Therefore, at present, in order to prevent browsing, measures such as wrapping the entire book with a transparent film, packing it with a plastic bag, or binding it with fine yarn are taken.
On the other hand, it is not necessary to use scissors or a cutter at the time of opening, and it can be safely peeled off, so that the front side and the back side are sealed with an adhesive label at the small edge of the book (for example, Patent Document 1).
JP 2002-187379

However, if the entire book is wrapped with a transparent film, packed in a plastic bag, or tied with a thin thread, it can be effectively prevented from browsing, but it must be cut with scissors or a cutter when opened. The problem was seen. Therefore, there is a danger that the transparent film, the plastic bag and the fine yarn are treated as waste after opening, as well as being dangerous at the time of opening.
Further, when the adhesive label disclosed in Patent Document 1 is attached, there is a problem that the label base material and the adhesive are not easily separated from the book when recycling magazines and books to recycle paper. It was. Therefore, it is difficult to selectively extract only the pulp, or some of the label base material and pressure-sensitive adhesive are mixed with the pulp, resulting in insufficient strength of recycled paper. It was.

Therefore, as a result of intensive studies, the present inventors have solved the above-described problems with a sealing member composed of a base material having a predetermined specific gravity and an adhesive layer made of a water-soluble adhesive or an alkali-soluble adhesive. I found that it can be solved.
That is, the present invention, when selling a book, can not be easily opened with a predetermined sealing property, while at the time of opening, the sealing member can be safely and easily peeled off, and when recycled, It is an object of the present invention to provide a sealing member in which a base material and an adhesive can be easily separated from a book and a book with such a sealing member.

According to the present invention, a sealing member for sealing a fore edge of a book, a base material having a specific gravity of 0.97 or less, and a pressure-sensitive adhesive layer made of a water-soluble pressure-sensitive adhesive or an alkali-soluble pressure-sensitive adhesive. The sealing member characterized by being comprised is provided, and the problem mentioned above can be solved.
That is, according to the sealing member of the present invention, since it has a pressure-sensitive adhesive layer made of a water-soluble pressure-sensitive adhesive or an alkali-soluble pressure-sensitive adhesive, it exhibits a sufficient pressure-sensitive adhesive force at the time of selling a book to obtain an effective sealing property. be able to. On the other hand, when the book with a sealing member is recycled as it is, the water-soluble pressure-sensitive adhesive layer or the alkali-soluble pressure-sensitive adhesive layer can be dissolved in a treatment liquid (water or an alkali solution). Further, since the pressure-sensitive adhesive layer is formed on a base material having a specific gravity of 0.97 or less, only the base material floats on the treatment liquid during recycling. The book can be easily separated.

Moreover, in comprising the sealing member of this invention, while setting the adhesive force after 30-minute sticking measured based on JISZ-0237 to a value of 7.0 N / 25mm or less, and 24 hours after sticking The adhesive strength is preferably set to a value of 14.0 N / 25 mm or less.
By comprising in this way, the sealing property at the time of use can be evaluated quantitatively, and the sealing member with a uniform adhesion characteristic can be manufactured stably. Moreover, when a water-soluble adhesive or an alkali-soluble adhesive is used, the adhesiveness to a book tends to increase with the passage of time, but this can be prevented and the predetermined opening property can be maintained.

Moreover, when comprising the sealing member of this invention, it is preferable that a base material is a surface treatment polypropylene film.
By configuring in this way, the range of pressure-sensitive adhesives can be expanded, and even when used under high-humidity conditions, a predetermined sealing property can be obtained, while the weight can be easily reduced. It can also improve the property.

Further, in constituting the sealing member of the present invention, when the sealing member affixed to the book is immersed in water or an alkaline solution at 23 ° C., the base material and the book are separated from each other within 72 hours. Is preferred.
By comprising in this way, the processability in the case of recycling can be evaluated quantitatively, and the sealing member with a uniform process characteristic can be manufactured stably.

Further, in constituting the sealing member of the present invention, a non-adhesive part that does not form an adhesive layer in the middle part of the sealing member, or a non-adhesive member that is formed by providing a non-adhesive member on the adhesive layer. It is preferable to provide an adhesive part.
By comprising in this way, it can prevent reliably that an adhesive adheres with respect to the edge of a book, and can prevent the damage of the book at the time of peeling the member for sealing effectively.

Moreover, in constructing the sealing member of the present invention, it is preferable that the area per unit area of the pressure-sensitive adhesive layer decreases from both end portions of the sealing member toward the intermediate portion.
By comprising in this way, it can prevent effectively that an adhesive adheres with respect to the fore edge of a book, and can prevent the damage of the book at the time of removing the sealing member effectively.

Another aspect of the present invention is a book with a sealing member having a small end sealed using a sealing member, the sealing member having a specific gravity of 0.97 or less, and a water-soluble material. A book with a sealing member, comprising: an adhesive layer made of an adhesive or an alkali-soluble adhesive.
That is, since it has a pressure-sensitive adhesive layer made of a water-soluble pressure-sensitive adhesive or an alkali-soluble pressure-sensitive adhesive, it can exhibit a sufficient adhesive force at the time of selling a book and obtain an effective sealing property. On the other hand, when the book with a sealing member is recycled as it is, the water-soluble pressure-sensitive adhesive layer or the alkali-soluble pressure-sensitive adhesive layer can be dissolved in a treatment liquid (water or an alkali solution). Further, since the pressure-sensitive adhesive layer is formed on a base material having a specific gravity of 0.97 or less, only the base material floats on the treatment liquid during recycling. The book can be easily separated.
Therefore, it is possible to obtain a book with a sealing member that can be easily recycled while preventing the product value from being lowered due to deterioration caused by browsing.

Further, in constituting the book with the sealing member of the present invention, the sealing member is a non-adhesive part that does not form an adhesive layer in the intermediate part of the sealing member, or a non-adhesive member on the adhesive layer It is preferable to provide a non-adhesive part formed by providing the.
By comprising in this way, while being able to prevent reliably that an adhesive adheres with respect to the edge of a book, damage to the cover of a book can be prevented effectively. Therefore, it is possible to obtain a book with a sealing member that can be easily recycled while further preventing a decline in commercial value.

Further, in configuring the book with the sealing member of the present invention, the sealing member is a sealing member that reduces the area per unit area of the pressure-sensitive adhesive layer from the both ends of the sealing member toward the intermediate portion. Preferably there is.
By comprising in this way, it can prevent effectively that an adhesive adheres with respect to the fore edge of a book, and can prevent the damage of the book at the time of removing the sealing member effectively. Therefore, it is possible to obtain a book with a sealing member that can be easily recycled while further preventing a decline in commercial value.

Moreover, when composing the book with a sealing member of the present invention, it is preferable that a sealing member is attached to each of a plurality of locations of the booklet with the sealing member.
By configuring in this way, a predetermined sealing property can be obtained regardless of the size of the book, and it can be effectively prevented from being turned from other than the fore edge.

[First embodiment]
The sealing member according to the first embodiment is a sealing member for sealing a fore edge of a book, and includes a base material having a specific gravity of 0.97 or less and a water-soluble adhesive or an alkali-soluble adhesive. It is a member for sealing characterized by comprising an agent layer.
Hereinafter, embodiments of the sealing member will be specifically described with reference to the drawings.
In FIG. 1, reference numeral 10 denotes a base material, reference numeral 12 denotes a pressure-sensitive adhesive layer, and reference numeral 14 denotes a sealing member composed of the base material 10 and the pressure-sensitive adhesive layer 12. Reference numeral 16 indicates a peeling member temporarily attached to protect the pressure-sensitive adhesive layer 12 before the sealing member 14 is used.

1. Substrate In the present invention, a substrate having a specific gravity of 0.97 or less is used.
The reason for this is that by using a base material having a specific gravity of 0.97 or less, at the time of recycling, only the base material floats on the processing liquid after the pressure-sensitive adhesive layer described later is dissolved in the processing liquid. is there. Therefore, the base material, the pressure-sensitive adhesive, and the book can be easily separated without using special means.
However, if the specific gravity of the substrate is excessively small, the strength of the substrate may be significantly reduced. Therefore, the specific gravity of the substrate used in the present invention is preferably set to a value in the range of 0.5 to 0.95, and more preferably set to a value in the range of 0.6 to 0.92.
In addition, examples of the base material having a specific gravity of 0.97 or less include a plastic film or synthetic paper made of a resin having a specific gravity of 0.97 or less and having a predetermined water resistance.
More specifically, a substrate made of polypropylene, low density polyethylene, medium density polyethylene, high density polyethylene, foamed polyester, or the like is used. Among them, a base material made of polypropylene is preferable because of good water resistance and easy weight reduction.

  A synthetic paper produced by an internal paper making method is also suitable as the substrate. More specifically, a synthetic paper which is a base material produced by melt-extrusion of a polypropylene resin into a film and biaxial stretching and having a microvoid inside is preferable. As such synthetic paper, for example, trade name YUPO (YUPO Corporation) and the like can be mentioned.

Moreover, regarding the thickness of the substrate, it is usually preferable to set the thickness to a value within the range of 10 to 200 μm.
The reason for this is that when the thickness of the base material is less than 10 μm, workability may be reduced when pasting on a book. On the other hand, if the thickness of the base material exceeds 200 μm, the stiffness of the film becomes strong, and the selection range of compatible pressure-sensitive adhesives may be narrowed or the sealing performance may be significantly reduced.
Therefore, the thickness of the base material is more preferably set to a value within the range of 20 to 100 μm, and further preferably set to a value within the range of 25 to 80 μm.

Further, the form of the substrate is not particularly limited, but may be a flat plate as shown in FIG. 1 (a), or the surface as shown in FIG. 1 (b). It is also preferable to provide an unevenness 10 'for preventing slippage.
Further, as shown in FIG. 1 (c), the surface of the base material or the base material colored by adding a colorant 10 ″ to the inside, as shown in FIG. Further, a base material with a symbol 10 '''is also suitable.
For example, by using a colored base material, it is possible to improve the discriminability with respect to the base material when it is floated by the treatment liquid at the time of recycling. Therefore, the recycling process can easily proceed even at night.
Further, by using a base material to which characters, figures, symbols, etc. are attached, the added value as a sealing member can be improved, and the distinguishability with respect to a book can be improved.

A surface-treated substrate, for example, a substrate subjected to corona treatment or easy adhesion treatment is suitable.
The reason for this is that by using such a surface-treated base material, the adhesion between the base material and the pressure-sensitive adhesive layer is improved. This is because a predetermined sealing property can be obtained even when used in the above.
In addition, by applying such a surface treatment, it is possible to suitably use a base material that is difficult to adhere as it is, such as polypropylene, but can be easily reduced in weight.
In constructing the sealing member of the present invention, a particularly suitable substrate is a surface-treated polypropylene film.
The reason for this is that the selection range of the pressure-sensitive adhesive to be used is widened, and even when used under high-humidity conditions, a predetermined sealing property can be obtained. It is because it can improve also about.
That is, the surface treatment makes it possible to sufficiently adhere the pressure-sensitive adhesive layer, and as its characteristics, it is easy to reduce weight and has excellent water repellency. This is because it is possible to effectively perform separation.

2. Pressure-sensitive adhesive layer (1) Types of pressure-sensitive adhesive The water-soluble pressure-sensitive adhesive or alkali-soluble pressure-sensitive adhesive is used as the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer.
The reason for this is that by using such an adhesive, an effective sealing property can be obtained by exhibiting sufficient adhesive force at the time of sales of books. On the other hand, when the book with a sealing member is recycled as it is, the water-soluble pressure-sensitive adhesive layer or the alkali-soluble pressure-sensitive adhesive layer can be dissolved in the treatment liquid (water or alkali solution).

The water-soluble pressure-sensitive adhesive or alkali-soluble pressure-sensitive adhesive is not particularly limited, but is preferably one that is easily dissolved in water, a sodium hydroxide aqueous solution having a concentration of 0.1 to 10%, or the like.
Specific examples of such pressure-sensitive adhesives include solvent-type and emulsion-type acrylic resin-based pressure-sensitive adhesives. A more preferred pressure-sensitive adhesive is an acrylic resin-based pressure-sensitive adhesive that contains a predetermined amount of carboxyl groups in the polymer constituting the pressure-sensitive adhesive and has improved hydrophilicity.

(2) Disaggregation In addition, when selecting a water-soluble adhesive or an alkali-soluble adhesive in the adhesive layer, when the sealing member affixed to the book is immersed in water or an alkaline solution (each at a temperature of 23 ° C.), It is preferable that the base material and the book are separated from each other within 72 hours.
This is because the water-soluble pressure-sensitive adhesive or alkali-soluble pressure-sensitive adhesive has such a disaggregation property, whereby the processability in the case of recycling can be quantitatively evaluated. Therefore, it becomes possible to stably manufacture a sealing member having uniform processing characteristics.
In addition, when immersing the sealing member affixed to the book in such water or an alkaline solution, it is preferable to stir. This is because the disintegration property of the water-soluble adhesive or alkali-soluble adhesive can be determined more accurately and quickly.

(3) Adhesive strength Further, regarding the adhesive strength of the adhesive layer, the adhesive strength after 30 minutes sticking to the stainless steel plate is measured in accordance with JISZ-0237, and the value is 7.0 N / 25 mm or less, The adhesive strength after 24 hours of sticking is preferably set to a value of 14.0 N / 25 mm or less.
The reason for this is that when the adhesive strength after 30 minutes exceeds 7.0 N / 25 mm and the adhesive strength after 24 hours exceeds 14.0 N / 25 mm, it becomes difficult for the purchaser to peel off the sealing member. This is because the case where the surface adherend is destroyed increases.
Accordingly, the adhesive strength after 30 minutes is more preferably within a range of 3.0 to 6.0 N / 25 mm, and the adhesive strength after 24 hours is more preferably within a range of 7.0 to 12.0 N / 25 mm. preferable.

(4) Coating amount and thickness of pressure-sensitive adhesive In addition, regarding the coating amount of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer, the coating amount of the water-soluble pressure-sensitive adhesive or alkali-soluble pressure-sensitive adhesive ranges from 5 to 60 g / m ² . It is preferable to set the value within the range.
The reason for this is that this configuration further improves the balance between the sealing property at the time of use and the processability when recycled.
That is, when the coating amount of the pressure-sensitive adhesive is less than 5 g / m ² , the sealing performance of the book by the sealing member may be poor. On the other hand, when the coating amount of the pressure-sensitive adhesive exceeds 60 g / m ² , it may be easily protruded from the base material, or may be damaged when the book is opened.
Therefore, it is more preferable to set the coating amount of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer to a value within the range of 10 to 40 g / m ² .

Moreover, regarding the coating amount of the pressure-sensitive adhesive, the thickness of the correlated pressure-sensitive adhesive layer is usually preferably a value in the range of 5 to 60 μm.
This is because when the thickness of the pressure-sensitive adhesive layer is less than 5 μm, the sealing performance of the book by the sealing member may be poor. On the other hand, when the thickness of the pressure-sensitive adhesive layer exceeds 60 μm, it may be easy to find from the base material, or may be damaged when the book is opened.
Therefore, the thickness of the pressure-sensitive adhesive layer of the sealing member is more preferably set to a value within the range of 10 to 40 μm.

(5) Additive In addition, the pressure-sensitive adhesive layer preferably contains a colorant, an antioxidant, a surfactant, a filler, a lightening agent, an antistatic agent, conductive particles, and the like as an additive.
In particular, when a predetermined amount of colorant is contained in the pressure-sensitive adhesive layer, it can be used as an indicator for judging whether or not the pressure-sensitive adhesive layer has been dissolved by diffusing to the surroundings when recycled. .
In addition, by including a predetermined amount of the surfactant in the pressure-sensitive adhesive layer, the permeability with the treatment liquid in the case of recycling is improved, and as a result, it can be dissolved more quickly.
Furthermore, by including a predetermined amount of a lightening agent in the pressure-sensitive adhesive layer, the specific gravity of the sealing member can be easily adjusted, and as a result, the contact property with the treatment liquid when recycling is improved. This is because the pressure-sensitive adhesive layer can be dissolved more quickly.

(6) Aspect of pressure-sensitive adhesive layer Further, as shown in FIGS. 2A to 2E and FIG. 3A, non-adhesive that does not form the pressure-sensitive adhesive layer 12 at the intermediate portions at both ends of the sealing member. 3 or a non-adhesive part formed by providing a non-adhesive member 11 (non-adhesive material layer 13) on the adhesive layer 12, as shown in FIG. 3 (b) or FIG. 3 (c). 17 is preferably provided.
The reason for this is that by providing the non-adhesive portion in this way, it is possible to reliably prevent the adhesive from adhering to the edge of the book. That is, by preventing the adhesive from adhering to the edge of the book, it is possible to solve problems such as dirt due to the adhesive and adhesion between pages.

Further, the shape of the non-adhesive portion is not particularly limited, and as shown in FIG. 2A, the shape of the non-adhesive portion 17 may be rectangular, as shown in FIG. As described above, the end portions 17a and 17b of the non-adhesive portion 17 may be anti-elliptical. Alternatively, as shown in FIG. 2C, the shape of the non-adhesive portion 17 may be approximately rhombus, and as shown in FIG. 2D, the adhesive layer 12 and the non-adhesive portion 17 The boundary adhesive may be gradationized.
Furthermore, as shown in FIG. 3B, a non-adhesive portion 17 may be formed by laminating a non-adhesive member 11 such as paper, a film, or synthetic paper on the adhesive layer 12, and FIG. As shown in c), the non-adhesive portion 17 may be formed by applying a non-adhesive material such as paint, ink, synthetic resin or the like on the adhesive layer 12 to form the non-adhesive material layer 13.

Moreover, it is preferable to reduce the area per unit area of the pressure-sensitive adhesive layer from both end portions of the sealing member toward the intermediate portion. That is, it is preferable that the pressure-sensitive adhesive layer is formed so that the area gradually increases from the small edge side toward the other side. For example, in the example of FIG. 2B, the end portions 17a and 17b of the non-adhesive portion 17 are anti-elliptical, and the adhesive layer area is adjusted. In the example of FIG. And the pressure-sensitive adhesive layer area is adjusted.
This is because it is possible to effectively prevent the adhesive from adhering to the edge of the book by adjusting the area of the adhesive layer in this way. On the other hand, when the sealing member is peeled off, the area of the pressure-sensitive adhesive layer in the intermediate portion is relatively small, so that damage to the book can be effectively prevented.
Conventionally, in the case of a sealing member having a uniform coating area, there has been a problem that either the front cover or the back cover of a book is easily damaged. More specifically, when opening the book, for example, if the sealing member is peeled off from the front side, the front side is peeled off from the center of the cover toward the cover edge. It is rare to damage the cover. On the other hand, in the back cover, since the sealing member is peeled off from the end of the back cover, there is a problem that stress is concentrated and the back cover is easily damaged. Moreover, since the surface opposite to the side to be opened is usually not visible, it was often noticed after the cover was damaged.
On the other hand, damage to the back cover can be effectively prevented by adopting the above-described configuration of the pressure-sensitive adhesive layer.

Moreover, it is preferable to provide the handle part comprised by not providing an adhesive layer in the edge part of the member for sealing, or providing the non-adhesive member on an adhesive layer. For example, FIG. 2 (e) is an example of a sealing member 14 provided with a handle portion 15 configured without forming the pressure-sensitive adhesive layer 12.
This is because the handleability of the sealing member can be greatly improved by providing the handle portion. That is, when opening the book with the sealing member attached, the sealing member can be easily peeled off using the handle portion as a trigger. Further, since the force can be uniformly applied using the handle portion, the risk of damage to the book can be further reduced.
In the example of FIG. 2 (e), the handle portions 15 are partially provided at both ends, but a handle portion may be provided in the entire area of both ends, or a handle portion may be provided only at one end. It may be provided.

(7) Formation method The formation method of the pressure-sensitive adhesive layer is not particularly limited. For example, a known knife coater, roll coater, roll knife coater, reverse coater, die coater, gravure coater, Meyer bar, etc. It is preferable to form the pressure-sensitive adhesive layer by applying directly to the substrate using the method and then drying.
Further, it is more preferable to transfer the pressure-sensitive adhesive layer to the substrate after applying the pressure-sensitive adhesive to the peeling surface of the peeling member using a knife coater or the like and drying the pressure-sensitive adhesive layer.
This is because the thermal damage to the substrate can be reduced by transferring the pressure-sensitive adhesive layer.

On the other hand, as a method for producing the sealing member 14 as shown in FIGS. 2A to 2E and FIG. 3A, a gravure coating method, a screen printing method, and a spray coating method are applied to the base material 10. Etc., and a method of partially applying the pressure-sensitive adhesive 12.
That is, a method of partially applying the adhesive 12 to the base material 10 to obtain a sealing member 14 as shown in FIG.
Further, after the pressure-sensitive adhesive layer 12 is formed on the entire surface of the substrate 10, a non-adhesive member 11 such as paper or film is pasted on the pressure-sensitive adhesive layer, and a sealing member as shown in FIG. The method of obtaining 14 is mentioned.
Further, after the pressure-sensitive adhesive layer 12 is formed on the entire surface of the base material 10, a non-adhesive material layer 13 is formed on the pressure-sensitive adhesive layer 12 by applying or spraying a non-adhesive material layer. The method of obtaining the sealing member 14 as shown in FIG.

3. Peeling member As a peeling member, a polyester film, a foamed polyester film, a plastic film such as a polypropylene film, a coated paper, a paper such as a glassine paper, and a base material such as a polyethylene laminated paper, a silicone-based release agent, For example, a fluorine release agent, a long-chain alkyl release agent, or the like applied thereto and a release layer having a thickness of 0.1 to 5 μm may be used.
Moreover, although it does not restrict | limit in particular regarding the thickness of the peeling member, ie, the total value of the thickness of the base material in a peeling member, and a peeling layer, Usually, it exists in the range of 20-200 micrometers. It is preferably a value.
And in the case of the sealing member 14 shown to Fig.1 (a)-(d), after peeling off the peeling member 16 and exposing the adhesive layer 12 first, in the fore edge 20 of the book 18, from the front side to the back side It is pasted so that it can be adhesively fixed across (Fig. 4).

[Second Embodiment]
The second embodiment is a book with a sealing member sealed with a sealing member using a sealing member, wherein the sealing member includes a base material having a specific gravity of 0.97 or less, a water-soluble adhesive or It is a book with a sealing member, characterized by comprising an adhesive layer made of an alkali-soluble adhesive.
Hereinafter, the content described in the first embodiment will be omitted, and the embodiment of the book with a sealing member will be specifically described with reference to the drawings, focusing on the content different from the first embodiment.

First, FIGS. 4A and 4B are examples in which the sealing member 14 is divided and arranged with respect to the fore edge 20 of the book 18.
However, although the sealing member 14 shown in FIG. 4B is a single sealing member 14, a rectangular opening 22 is provided at the center thereof, and as a result, the small opening 20 is divided. This is an example of arrangement.
FIG. 5A shows an example in which the sealing member 14 is attached to the central portion of the fore edge 20 of the book 18.
However, in the example of FIG. 5A, depending on the size of the small edge 20 of the book 18 and the tape width of the sealing member 14, the upper or lower portion of the small edge 20 of the book 18 may be turned.

Therefore, as shown in FIG. 5 (b), the sealing member 14 having a relatively large area is provided so that the upper and lower portions are covered and cannot be turned regardless of the size of the small edge 20 of the book 18. It is also preferable to use it.
Furthermore, as shown in FIGS. 4A and 4B, it is more preferable that the sealing members 14 are divided and arranged so as to have a predetermined width or more at a plurality of positions of the forehead 20 of the book 18.
The size of the sealing member 14 can be appropriately changed depending on the adhesive strength of the pressure-sensitive adhesive layer 12 in the sealing member 14 and the size of the book 18 to be attached. However, the width of the sealing member 14 is 3 cm. The above configuration is preferable.

Further, in constituting the book with the sealing member of the present invention, the adhesive layer of the sealing member that is pasted on the front and back surfaces of the book across the small edge of the book is not attached to the front and back surfaces of the book near the small edge. It is preferable that a sealing member formed so that the area of the pressure-sensitive adhesive layer gradually increases from the small edge side to the other side of the sealing member.
By comprising in this way, it can prevent reliably that an adhesive adheres with respect to the edge of a book. Moreover, peeling of the member for sealing at the time of opening can be made still easier.
Therefore, it is possible to obtain a book with a sealing member that can be easily recycled while further preventing a decline in commercial value.
In addition, about the specific form in such a book with a sealing member, what changed the form of the adhesive layer in the sealing member variously as described in 1st Embodiment is mentioned. Specific examples of these are shown in FIGS.

  EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, it cannot be overemphasized that this invention is not limited to description of the following Examples.

[Example 1]
1. Creating a sealing member Using a roll coater, a water-soluble acrylic pressure-sensitive adhesive (Lintec Co., Ltd.) is applied to the peeling surface of a 90 μm-thick peeling member ("SP-8K Ao" manufactured by Lintec Co., Ltd.). “P-0093”) was applied so as to form a pressure-sensitive adhesive layer having a thickness of 25 μm (28 g / m ² ) after drying, and dried to form a pressure-sensitive adhesive layer.
Next, as a base material, a polypropylene film having a thickness of 50 μm and a specific gravity of 0.91 (“Rayoface CPA51” manufactured by UCB Japan Co., Ltd.) was prepared and subjected to corona treatment on one side. The formed peeling members were laminated to create a sealing member having the configuration shown in FIG.

2. Evaluation of sealing member (1) Adhesive strength Further, the adhesive strength of the obtained sealing member was evaluated.
That is, regarding the adhesive strength of the sealing member, the adhesive strength (N / 25 mm) to the stainless steel plate was measured after 30 minutes and 24 hours after sticking in accordance with JISZ0237.

(2) Disaggregation test Moreover, the disaggregation test in the obtained sealing member was implemented.
That is, a book (weekly magazine, 30 cm long, 21 cm wide, 2.5 cm thick) with a sealing member of a predetermined size (50 mm × 50 mm) was cut into a 10 mm × 10 mm grid pattern (25 pieces). Then, they were respectively put into 23 ° C. water and 3% sodium hydroxide solution as treatment liquids. Next, after stirring for 3 days with stirring, the disaggregation state of the sealing member was visually observed and evaluated according to the following criteria.
○: The base material separated from the book and floated on the treatment liquid.
(Triangle | delta): Although a base material isolate | separates from a book, it is a state which does not float on a process liquid.
X: A state in which the base material is not separated from the book.

[Comparative Example 1]
A sealing member was prepared and evaluated in the same manner as in Example 1 except that a polyester film having a thickness of 50 μm and a specific gravity of 1.4 (“Lumirror # 50” manufactured by Toray Industries, Inc.) was used as the substrate. .

[Comparative Example 2]
A sealing member was prepared and evaluated in the same manner as in Example 1 except that a non-water-soluble acrylic pressure-sensitive adhesive (“PLN” manufactured by Lintec Corporation) was used as the pressure-sensitive adhesive.

[Example 2]
1. Preparation of sealing member provided with non-adhesive part In Example 2, high-quality paper (KPY manufactured by Nippon Paper Industries Co., Ltd., thickness) with respect to the adhesive layer surface of the sealing member prepared in Example 1: 73 [mu] m) was bonded, and a 35 mm x 100 mm sealing member provided with the non-adhesive member 11 as shown in FIG. 8 was produced.

2. Evaluation of book damage The created sealing member is attached to the small edge of a book (length 30 cm, width 21 cm, thickness 3 cm) as shown in FIG. 4 (a), and after 24 hours, the front side of the book The end of the sealing member was peeled off with a finger, and the sealing member was slowly peeled toward the back side through the edge. The results were evaluated according to the following criteria. The obtained results are shown in Table 2.
○: There was no damage on the front and back of the book.
Δ: The surface of the book was not damaged, but the back was slightly damaged.
X: The front surface of the book was not damaged, but the back surface was greatly damaged.

[Example 3]
In Example 3, a sealing member was prepared and evaluated in the same manner as in Example 2 except that the non-adhesive portion was not provided in the sealing member prepared in Example 2. The obtained results are shown in Table 2.

According to the sealing member and the book with a sealing member of the present invention, it is possible to provide a sealing member and a book with the sealing member that can obtain a predetermined sealing property and can also obtain a good recyclability.
Therefore, it is expected to contribute to promoting the recycling of books and improving the quality of recycled paper as well as preventing the deterioration of books due to browsing.

(A)-(d) is sectional drawing in the various aspects of the member for sealing. (A)-(e) is a figure provided in order to demonstrate the aspect of the member for sealing which provided the non-adhesion part. (A)-(c) is a figure provided in order to demonstrate the method of creating the aspect of the member for sealing which provided the non-adhesion part. (A)-(b) is a figure provided in order to demonstrate the use condition in the various aspects of the member for sealing. (A)-(b) is a figure provided in order to demonstrate the use condition in the various aspects of another member for sealing. (A)-(c) is a figure provided in order to demonstrate the use condition in the aspect of another member for sealing. (D)-(f) is a figure provided in order to demonstrate the use condition in the aspect of another member for sealing. It is a figure provided in order to demonstrate the member for sealing in Example 2. FIG.

Explanation of symbols

10: Base material 11: Non-adhesive member 12: Adhesive layer 13: Non-adhesive material layer 14: Sealing member 15: Handle part 16: Peeling member 17: Non-adhesive part 18: Book 20: Forehead 22: Opening

Claims (10)

A sealing member for sealing a small edge of a book,
A sealing member comprising a base material having a specific gravity of 0.97 or less and a pressure-sensitive adhesive layer made of a water-soluble pressure-sensitive adhesive or an alkali-soluble pressure-sensitive adhesive.   The adhesive strength after 30 minutes sticking measured in accordance with JISZ-0237 is set to a value of 7.0 N / 25 mm or less, and the adhesive strength after 24 hours sticking is set to a value of 14.0 N / 25 mm or less. The sealing member according to claim 1.   The sealing member according to claim 1 or 2, wherein the base material is a surface-treated polypropylene film.   The base material and the book are separated from each other within 72 hours when the sealing member affixed to the book is immersed in water at 23 ° C or an alkaline solution at 23 ° C. The sealing member as described.   The non-adhesive part which does not form the said adhesive layer in the intermediate part of the said sealing member, or the non-adhesive part formed by providing a non-adhesive member on the said adhesive layer is provided, It is characterized by the above-mentioned. Item 5. A sealing member according to Item 1-4.   The sealing member according to any one of claims 1 to 5, wherein an area per unit area of the pressure-sensitive adhesive layer is decreased from both end portions of the sealing member toward an intermediate portion. It is a book with a sealing member that is sealed with a sealing member using a sealing member,
A book with a sealing member, wherein the sealing member is composed of a base material having a specific gravity of 0.97 or less and an adhesive layer made of a water-soluble adhesive or an alkali-soluble adhesive.   The sealing member is provided with a non-adhesive part that does not form the pressure-sensitive adhesive layer, or a non-adhesive part that is formed by providing a non-adhesive member on the pressure-sensitive adhesive layer, in an intermediate part of the sealing member. The book with a sealing member according to claim 7, wherein the book is a sealing member.   9. The sealing member according to claim 7, wherein the sealing member is a sealing member that reduces an area per unit area of the pressure-sensitive adhesive layer from both ends of the sealing member toward an intermediate portion. Book with sealing material.   10. The book with a sealing member according to claim 7, wherein the sealing member is attached to each of a plurality of positions of the small edge of the book with the sealing member. 11.

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