JP2002362060A - Member for sheet binding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a member for sheet binding by which a plurality of laminated sheets can be bound into a booklet-like shape and removal and rebinding of the bound sheets can be easily repeated and the sheets can be made into a strongly bound booklet. SOLUTION: The member for sheet binding prepared by providing a sheet fixing layer comprising a re-peelable pressure-sensitive adhesive and a hot-melt adhesive with a melting temperature or a reaction temperature of higher than 60 deg.C on a substrate is provided and the sheet fixing layer has such pressure- sensitive adhesive properties that can repeat fixing and removal of the end faces of the sheets and the sheet fixing layer generates such adhesive properties that can strongly fix the end faces of the sheets being brought into contact with it when temperature is elevated up to the melting temperature or the reaction temperature or higher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet binding member for binding sheets such as printed matter into a booklet.

[0002]

2. Description of the Related Art A plurality of sheets, such as printed materials such as postcards, cards, business cards, etc., and memos, etc., are difficult to handle as individual sheets as the number of sheets increases, and sheets are stacked in a booklet form and bound on one side. For example, the printed content of each sheet can be easily read or newly written while the sheets are stacked together. Conventionally, in order to bind the sheets in this way, a method using a metal fitting, a method using a thread, a method using a resin, and the like have been used.

[0003]

However, in the method using a metal fitting and the method of sewing with a thread, it is necessary to provide a perforated portion for penetrating the metal fitting and the thread near the end of the sheet. And it is not possible to newly write at the end of the sheet. Further, there is a problem that the sheet is damaged when a perforation is formed in the sheet or when the sheet is bound and handled, and that the metal fittings and the threads are exposed, thereby deteriorating the aesthetic appearance of the booklet in which the sheet is bound. On the other hand, in the method of bonding with resin, the sheet is bound by pressing or applying an adhesive resin to the end face of the sheet, that is, one side of the thickness of the sheet, and the sheet can be spread, but the sheet is bonded once. If you do, you can no longer remove it. Also,
Even if it can be removed, the resin at the removed site is solidified and has no adhesiveness. For this reason, it has been difficult to replace sheets, rearrange the order of stacked sheets, or print a new sheet and return to a booklet.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to staple a plurality of stacked sheets in a booklet form, to easily remove and rebind the bound sheets, and to bind the sheets. An object of the present invention is to provide a sheet binding member that can be a booklet that is strongly bound.

[0005]

That is, a sheet binding member of the present invention comprises a sheet fixing layer containing a removable adhesive and a hot melt adhesive having a melting temperature or a reaction temperature exceeding 60 ° C. on a support. Wherein the sheet fixing layer has an adhesive property at room temperature that can repeatedly fix and remove the end face of the sheet, and the sheet fixing layer is heated to a temperature higher than the melting temperature or the reaction temperature. Then, it is characterized in that an adhesive property capable of firmly fixing the end face of the contacted sheet is generated.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the sheet binding member of the present invention, the sheet fixing layer contains a removable adhesive and a hot melt adhesive. The function of the re-peelable pressure-sensitive adhesive is to fix the sheet when pressure is applied by bringing the end face of the sheet into contact with the sheet fixing layer, and to exhibit adhesiveness such that removal and re-fixing of the sheet can be repeated. On the other hand, the function of the hot melt adhesive is to fix the sheet firmly when it is solidified by contacting the end face of the sheet with the sheet fixing layer, heating the sheet to a temperature higher than the melting temperature or reaction temperature, and then cooling it to the temperature or lower. To be adhesive.

Here, the sheet is fixed by pressing one of its end faces, that is, one of the thickness faces, against the sheet fixing layer, and the fixed sheet can be easily removed from the sheet fixing layer, and the detached sheet or another sheet can be removed. A slight fixation that can easily fix the sheet to the sheet fixing layer again and can repeatedly remove and fix,
"Temporary fastening". The adhesive strength of the temporary fixing is such that the sheet does not come off even when the booklet is normally used, for example, when the bound sheet is turned or written on the sheet, and the sheet can be easily removed. A degree of adhesive strength is preferred. For example, the adhesive strength in the temporarily fixed state is 100
１０００1000 g / 25 mm is preferred.

[0008] On the other hand, a firm fixing in which the end surface of the sheet is fixed to the sheet fixing layer and the sheet can no longer be easily removed is hereinafter referred to as "final fastening". The state of the final fastening is obtained by heating the sheet fixing layer to which the sheet is temporarily fastened to a predetermined temperature of 60 ° C. or more specific to the hot-melt adhesive, and then cooling it to the predetermined temperature or less. For example,
The adhesive strength in the final fastening state is 500 to 5000 g / 25.
mm is preferred.

[0009] The removable adhesive contained in the sheet fixing layer of the sheet binding member of the present invention has an adhesive property that enables the sheet fixing layer to be temporarily fixed, that is, an adhesive property that enables repeated removal and fixing of the sheet. , At room temperature, appropriately selected from ordinary removable adhesives according to the material and thickness of the support and the sheet to be bound. In addition, it is preferable that the adhesive of the re-peelable adhesive does not significantly change with time.

The removable adhesive is, for example, acrylic,
Viscoelastic polymers such as rubber-based and silicone-based are exemplified. Examples of the acrylic polymer include methyl acrylate, ethyl acrylate, methyl methacrylate, butyl acrylate, isooctyl acrylate, 2-ethylhexyl acrylate, isononyl acrylate, hydroxyl acrylate, and glycidyl acrylate. Examples of the rubber-based polymer include nitrile rubber, isoprene rubber, butyl rubber, chloroprene rubber, chloride rubber, styrene-butadiene copolymer, and natural rubber. Examples of the silicone-based polymer include methyl silicone and phenyl silicone.

These can be used alone or in combination of two or more. Further, examples of the form of the removable adhesive include a solution type in which the polymer is dissolved in a solvent, an emulsion type in which the polymer is dispersed in water, and a hot melt type in which the polymer is heated and softened during application.

The sheet fixing layer in the present invention contains the removable pressure-sensitive adhesive as described above and has a tackiness that can be temporarily fixed at room temperature. In the present invention, “room temperature” means 5 to 3
Indicates 5 ° C.

[0013] The hot melt adhesive contained in the sheet fixing layer of the sheet binding member of the present invention has a melting temperature or a reaction temperature exceeding 60 ° C, and when the temperature of the sheet fixing layer is raised to the melting temperature or the reaction temperature or higher, the contact is made. If an adhesive property capable of firmly fixing the end surface of the formed sheet can be generated, it can be appropriately selected from ordinary hot melt adhesives and used. For example, an ethylene copolymer, an olefin polymer, a styrene elastomer, or the like can be used.

Specifically, as an ethylene copolymer,
Examples thereof include an ethylene-vinyl acetate copolymer, ethyl methacrylate, and ethyl ethacrylate. Examples of the olefin-based polymer include atactic polypropylene, low-density polyethylene, and non-crystalline polyalphaolefin. As a styrene elastomer,
Styrene-isoprene-styrene block copolymer (S
IS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-propylene-styrene block copolymer (SEPS), and the like.
Other examples include polyesters, polyamides, and polyurethanes.

A hot melt adhesive is a thermoplastic resin type that melts and liquefies when heated to a melting temperature, that is, a softening point or a melting point, and then solidifies when cooled, and is heated to a reaction temperature. By this, a chemical reaction such as a condensation reaction is caused to occur, and the reaction is solidified. Although any type may be used for the sheet fixing layer in the present invention, the melting temperature or the reaction temperature needs to be higher than 60 ° C. in order to be distinguished from the temporary fixing temperature. Reaction temperature 6
The temperature is preferably from 0 to 150 ° C. from the viewpoint of final fastening workability.

The sheet fixing layer used in the present invention may have good tackiness, adhesiveness, and fluidity, if necessary, in common with or separately from the removable adhesive and the hot melt adhesive. A tackifier is added. As the tackifier, there are a natural resin type and a synthetic resin type. Examples of natural resin type include rosin, rosin derivative, terpene resin, terpene phenol resin, aromatic modified terpene resin, hydrogenated terpene resin, and the like.Examples of synthetic resin type include petroleum resin, alkyl phenol resin, Xylene resin, coumarone indene resin and the like can be mentioned.

In the sheet binding member of the present invention, the sheet fixing layer is provided on a support. Papers, plastic films, cloths, and the like can be used for the support, and are appropriately selected depending on the application. Examples of paper include high quality paper,
Examples include imitation paper, coated paper, art paper, and the like, and recycled paper can also be used. Examples of plastic films include films of polyester, polypropylene, polyethylene and the like. Examples of the cloth include a woven cloth and a nonwoven cloth.

In the temporarily fixed state, the adhesive strength between the removable adhesive and the support or the adhesive strength between the removable adhesive and the hot melt adhesive is smaller than the adhesive strength between the removable adhesive and the sheet. It is preferable that the temporarily fixed sheet can be removed without any attached matter.

The shape of the support is not particularly limited. However, when the sheets are bound in a booklet shape, the support is preferably in the form of a flake serving as the spine of the booklet. Further, the sheet may be extended to the width of the sheet, for example, the size of a postcard, so as to be the cover of the booklet. It is preferable that the support has flexibility in the stacking direction of the sheets so that the sheets can be easily opened even when the sheets are bound thick.

As described above, the sheet fixing layer of the sheet binding member of the present invention contains a removable adhesive which can temporarily fix the sheet and a hot melt adhesive which can completely fix the sheet by heating. The sheet fixing layer is provided on a part or the whole of the support as long as the action of both the removable adhesive and the hot melt adhesive is not hindered. That is, it is configured such that both the removable adhesive and the hot-melt adhesive can come into contact with the end face of any one sheet to be bound.

FIGS. 1A to 1D are schematic cross-sectional views of an embodiment of the sheet binding member of the present invention provided with various sheet fixing layers. In FIG. 1, 1 is a support, 2 is a sheet fixing layer, and 3 is a protective film described later.

FIG. 1A shows a sheet fixing layer 2.
This is an example in which a hot melt adhesive layer 21 and a removable adhesive layer 22 are provided adjacent to each other on the entire surface of the support 1 without overlapping. FIG. 1B shows a support 1 as a sheet fixing layer 2.
In this example, a hot-melt adhesive layer 21 is provided on the entire upper surface, and a removable adhesive layer 22 is provided on a part of the hot-melt adhesive layer 21. FIG. 1C shows that a removable adhesive layer 22 is provided on the entire surface of the support 1 as the sheet fixing layer 2, and a hot melt adhesive layer 21 is provided on a part of the removable adhesive layer 22. This is an example in which is provided. FIG. 1D shows an example in which a mixture layer 23 of a removable adhesive and a hot melt adhesive is provided on the entire surface of the support 1 as the sheet fixing layer 2. FIG. 2 shows a state in which the sheet binding member shown in FIG.
FIG.

As shown in FIGS. 1A to 1C, when the removable adhesive and the hot-melt adhesive are alternately exposed on the surface of the sheet fixing layer, the sheet to be bound is hot-melt. It comes into contact with the adhesive layer 21 and the removable pressure-sensitive adhesive layer 22 alternately. In particular, when the removable adhesive and the hot-melt adhesive are alternately and parallelly exposed on the surface of the sheet fixing layer, that is, in a striped manner, both sheets are re-equivalent to the hot-melt adhesive layer 21 at an equal ratio. This is preferable because it can come into contact with the release adhesive layer 22. For example, in the case of a sheet binding member that binds the long side of a postcard, the width of the stripe is 5 to 20 mm each, from the viewpoint of workability at the time of manufacturing the sheet binding member and handleability of the bound sheet. preferable. Here, although not particularly illustrated, when the direction of the stripe is perpendicular to the thickness direction of the sheet, the sheet binding member can use two types of binding methods in parallel. For example, the front half of the booklet can be used exclusively for final fastening, and the rear half of the booklet can be used for both temporary fastening and final fastening.

The thickness of the removable pressure-sensitive adhesive layer is from 20 to 40.
The thickness is preferably about 0 μm, and the thickness of the hot melt adhesive layer is preferably about 20 to 400 μm. When the sheet fixing layer is a single layer as shown in FIG. 1D, the thickness of the sheet fixing layer is preferably about 40 to 800 μm.

In order to provide the sheet fixing layer on the support, a usual coating apparatus can be used. For example, a roll, a gravure,
The sheet fixing layer can be provided by simultaneously or separately applying a hot melt adhesive and a removable adhesive to the surface of the support with a screen, a nozzle, a spray, a jet, a wheel, or the like. If necessary, the hot-melt adhesive or the removable adhesive may be diluted with a solvent in advance.

The sheet fixing layer of the sheet binding member of the present invention is preferably coated with a protective film for improving workability. As the protective film, a material which can be easily peeled at room temperature from the hot melt adhesive and the removable adhesive in the present invention may be appropriately selected from general protective film materials and release treatments. For example, paper, polyesters such as polyethylene terephthalate, polymethylpentene, polypropylene, polyolefins such as polyethylene, halogen-containing vinyl polymers such as polyvinyl fluoride and polyvinyl chloride, polyamides such as nylon, cellulose such as cellophane, and films such as polystyrene. Which has been subjected to a release treatment.

When the number of sheets to be stapled is small, the protective film is divided into a plurality of sheets in the sheet thickness direction so that the surplus portion of the sheet fixing layer is not exposed, so that the protective film can be sequentially peeled in accordance with the number of sheets to be stapled. You may do it.

FIGS. 3 and 4 are schematic perspective views showing a use mode of binding sheets by the sheet binding member of the present invention. Hereinafter, a method of binding sheets will be described with reference to the drawings. When the sheet fixing layer of the sheet binding member is covered with the protective film, the covering sheet is removed in advance. First, in the case of binding a sheet by temporary fixing, when the end surface of the laminated sheet 4, that is, the surface of the sheet thickness is pressed against the sheet fixing layer 2, the removable adhesive layer 22 in the sheet fixing layer 2 causes
As shown in FIG. 3, the laminated sheets 4 are temporarily fixed.

Since the temporarily fixed sheet 4 is bound to the sheet fixing layer 2 with only one side of the thickness, the sheet 4 can be turned or spread like a booklet. Here, it is preferable that the removable adhesive layer 22 has sufficient adhesive strength so that the sheet does not come off during handling such as a booklet. The support 1 of the sheet binding member corresponds to a spine of a booklet of the stacked sheets 4 to be bound.

In this state, when one of the temporarily fixed sheets is pulled up, the pulled up sheet can be easily removed from the sheet fixing layer 2. FIG. 4 shows a schematic perspective view of this detached state. In the figure, reference numeral 5 denotes one removed sheet. It is preferable that the detached sheet keeps the state before lamination without attaching the removable adhesive. When characters are added to the detached sheet 5 and the sheet is returned to the original position between the stacked sheets and pressed against the sheet fixing layer 2, the sheet 5 is temporarily fixed again by the removable adhesive. The sheets need not be a plurality of stacked sheets, and one sheet may be bound at a time.

Next, the case where the sheets are bound by the final fastening will be described. When heated with a household iron from the support 1 side of the sheet binding member on which the laminated sheets are temporarily fastened, that is, from the spine side of the booklet, the hot melt adhesive layer 21 of the sheet fixing layer 2 becomes softened, melted or reacted. Reach temperature and melt. When the temperature is returned to room temperature, the hot melt adhesive layer 21 is solidified and the sheet 4 is firmly fixed to the sheet fixing layer 2 and bound. Now, even if one sheet is pulled up, it cannot be removed. Attempting to forcibly remove the sheet may cause the sheet to break or the sheet fixing layer to peel off from the support.

[0032]

The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the invention thereto. Example 1 A high-quality paper having a thickness of 150 μm was prepared as a support material, and a polyester hot-melt adhesive (manufactured by Toyobo Co., Ltd., Byron GM900) having a melting temperature of 130 ° C. was coated on one side of the high-quality paper with a thickness of 250 μm. Width 20mm, spacing 2
A hot melt adhesive layer was formed by applying a nozzle coater so as to form a 0 mm equally-spaced stripe shape. Next, an emulsion-type acrylic re-peelable pressure-sensitive adhesive (product name: Rica Bond 80R, manufactured by Chuo Rika Kogyo Co., Ltd.) is applied with a gravure coater to a width of 20 mm so as to fill the gaps between the adhesive layers, and then re-peeled to a thickness of 250 μm. An adhesive layer was provided. As a result, the hot melt adhesive layer and the removable pressure-sensitive adhesive layer have a thickness of 25 which is alternately and adjacently arranged in parallel stripes at regular intervals.
A sheet fixing layer of 0 μm was obtained. A protective film was overlaid on the sheet fixing layer to cover the sheet fixing layer.

Next, the sheet fixing layer with the protective film is cut into a size of 150 mm in a direction crossing the stripe of the hot melt adhesive layer and the removable pressure-sensitive adhesive layer and 40 mm in a direction parallel thereto, A sheet binding member for binding 100 postcards was obtained. FIG. 1A is a cross-sectional view of the sheet binding member in a direction crossing the stripe.

When the protective film is removed from the sheet binding member obtained above (see FIG. 2) and the thick side of the long side of the stacked 50 postcards is pressed against the sheet fixing layer, re-peeling in the sheet fixing layer is performed. The postcard was fixed by the adhesive layer as shown in FIG. Furthermore, it was possible to temporarily fix up to 100 postcards in the same manner. The temporary postcard was handled like a booklet and turned over or spread, but the postcard did not come off.

Next, when one of the temporarily fixed postcards is lifted, one of the raised postcards is removed from the sheet fixing layer without any damage or adhesion of the removable adhesive.
Could be removed as shown. When letters were added to the removed postcard, the postcards were returned to their original positions between the stacked postcards, and pressed against the sheet fixing layer, the postcards were fixed again and temporarily fixed.

Next, the sheet was heated at 140 ° C. with a household iron from the support side of the sheet binding member on which the 100 postcards were temporarily fastened, that is, from the spine side of the booklet.
The hot melt adhesive layer of the sheet fixing layer melted. When the temperature was returned to room temperature, the 100 postcards were firmly fixed to the sheet fixing layer and were in a fully-clamped state. I couldn't remove the postcard even if I pulled it up.

Example 2 150 μm thick as support material
Was prepared, and the polyester hot melt adhesive used in Example 1 was applied to one surface of the wood free paper with a roll coater to obtain a hot melt adhesive layer having a thickness of 250 μm. Next, on the hot melt adhesive layer, the emulsion-type acrylic removable pressure-sensitive adhesive used in Example 1 was gravure-coated so as to form a stripe shape at an equal interval of 250 μm in thickness, 20 mm in width, and 20 mm in interval. It was applied with a coater to provide a removable adhesive layer. As a result, the lower hot-melt adhesive layer is exposed from the gap between the removable adhesive layers, and the removable adhesive and the hot-melt adhesive form a surface in a stripe shape that is alternately and parallel at equal intervals. Thus, a sheet fixing layer having a thickness of 500 μm was obtained. Further, in the same manner as in Example 1, the sheet fixing layer was covered with a protective film and cut to obtain a sheet binding member for binding 100 postcards. FIG. 1B is a cross-sectional view of the sheet binding member in a direction crossing the stripe.

(Example 3) 150 μm thick as support material
Quality paper was prepared. Styrene-isoprene-styrene block copolymer-based hot melt adhesive with a melting temperature of 120 ° C (Claton Polymers product number D-1107)
And a natural rubber-based removable adhesive containing rosin (Toyo Petrolite Co., product number P-708K) at 150 ° C.
While heating the mixture. This mixture is applied on one side of the high-quality paper by a roll coater to a thickness of 25%.
A sheet fixing layer of 0 μm was obtained. Further, in the same manner as in Example 1, the sheet fixing layer was covered with a protective film and cut to obtain a sheet binding member for binding 100 postcards. FIG. 1D is a cross-sectional view of the sheet binding member in a direction crossing the stripe.

When 100 postcards were bound in the same manner as in Example 1 using the sheet binding members obtained in Examples 2 and 3, temporary fixing (fixing, removing, and re-fixing) was performed as in Example 1. And it was possible to perform final fastening.

[0040]

According to the sheet binding member of the present invention, the sheet can be bound by either temporary fastening or permanent fastening. As a result, from the booklet where the sheets are temporarily stapled,
After temporarily removing the sheet and temporarily rearranging the sheet, or adding a new sheet, the sheet can be temporarily fixed again, and further, these steps can be repeated. Further, the sheet can be firmly bound by the final fastening only by heating the booklet of the temporary fastening without the need to re-bind using another binding member.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing an embodiment of a sheet binding member of the present invention. FIG. 1 (a) shows a hot-melt adhesive layer and a removable pressure-sensitive adhesive layer adjacent to each other over the entire surface of a support. (B) is an example in which a hot-melt adhesive layer is provided on the entire surface of the support, and a removable adhesive layer is provided on a part of the hot-melt adhesive layer, (c). Is an example in which a removable pressure-sensitive adhesive layer is provided on the entire surface of a support, and a hot melt adhesive layer is provided on a part of the removable pressure-sensitive adhesive layer. This is an example in which a layer in which a removable adhesive and a hot melt adhesive are mixed is provided.

FIG. 2 is a schematic perspective view of the sheet binding member of FIG. 1A with a protective film removed.

FIG. 3 is a schematic perspective view showing an example of a usage form of the sheet binding member of FIG. 2;

FIG. 4 is a schematic perspective view of the usage pattern of FIG. 3 with one sheet removed.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 support 2 sheet fixing layer 21 hot melt adhesive layer 22 removable adhesive layer 23 mixture layer of removable adhesive and hot melt adhesive 3 protective film 4 laminated sheet 5 removed single sheet

Claims (4)

[Claims] 1. A sheet binding member comprising a support having thereon a sheet fixing layer containing a removable adhesive and a hot melt adhesive having a melting temperature or a reaction temperature higher than 60 ° C. Has an adhesive property that can repeatedly fix and remove the end face of the sheet at room temperature, and the sheet fixing layer can firmly fix the end face of the contacted sheet when the temperature is raised to the melting temperature or the reaction temperature or higher. A sheet binding member that generates a property. 2. The sheet binding member according to claim 1, wherein the sheet fixing layer is made of a mixture of a removable adhesive and a hot melt adhesive. 3. The sheet binding member according to claim 1, wherein the removable adhesive and the hot melt adhesive are alternately and parallel exposed on the surface of the sheet fixing layer. 4. The sheet binding member according to claim 1, wherein a protective film is coated on the sheet fixing layer.