JP6898623B2 - Perfect binding - Google Patents

Description

The present invention relates to perfect binding, specifically, perfect binding with excellent spreadability and productivity.

Generally, a book is composed of a part of the text called the body and a cover. The bookbinding method includes "thread binding" and "wireless binding", which are traditional bookbinding methods used for books and the like. "Thread binding" is a bookbinding method in which paper is fixed using threads when binding.

On the other hand, "wireless binding" is a bookbinding method that does not use threads when binding, and a streak-like scratch called gully is provided on the spine of the body (the part that becomes the spine cover when binding), and that part is covered with streaks. Adhesive such as glue is applied, and glue with a width of several millimeters is applied to the back side of the front and back covers and the back cover, respectively, and the front and back covers and the main body are bonded and fixed. That is. As one of the perfect bindings, there are a bookbinding structure disclosed in Patent Document 1 and a bookbinding structure disclosed in Patent Document 2.

Japanese Unexamined Patent Publication No. 2018-1456 Japanese Unexamined Patent Publication No. 2012-232468

However, as shown in FIG. 10, when the cover C is bound by perfect binding using thick paper, the strength of the spine is added and the throat portion T is less likely to be deformed (bent). Therefore, the strength of the throat portion T is increased. More. As a result, there is a problem that the spreadability of the bookbinding is deteriorated (the spread angle θ becomes small).

Further, the bookbinding disclosed in Patent Document 1 has a problem that the productivity is lowered because it is necessary to foam the moisture-curable polyurethane hot-melt adhesive. Further, the bookbinding disclosed in Patent Document 1 needs to have a cover, which has a problem that the spreadability is deteriorated.

Further, the bookbinding structure disclosed in Patent Document 2 has a problem that the spreadability is good, but the structure is complicated and the productivity is low.

In addition to this, as one of the bookbindings having good spreadability, there is a codex bookbinding (codex binding) which is a kind of overlock binding bookbinding. In Codex bookbinding, after fixing (wrapping) multiple sheets of paper together using threads, adhesive is applied to the spine of the body (the part that becomes the spine cover when binding) without attaching the cover. , The above-mentioned grouping is fixed and bound. The adhesive applied here is used to prevent each matoi from shifting, and does not fix each piece of paper. The spreadability of the Codex bookbinding is guaranteed by the thread.

Such Codex bookbinding has a problem that productivity is lowered because a process of fixing the paper using a thread is required. Further, in Codex bookbinding, there is a problem that threads appear on the back surface and the design (aesthetics) of bookbinding is deteriorated. Further, in Codex bookbinding, as described above, there is a problem that the strength is low because the bookbinding is performed by applying an adhesive to the spine of the body without attaching a cover or the like and fixing a plurality of the above-mentioned matois. It was. In addition, there is a problem that it is not possible to bind a book using paper having a different thickness for each page.

And, among bookbindings made of paper-like materials having different thicknesses, there has been no bookbinding having good spreadability and good productivity.

In view of the above circumstances, it is an object of the present invention to provide a perfect binding bookbinding having excellent spreadability and high productivity.

As a result of diligent research on the above-mentioned problems, the inventor of the present invention has found the following epoch-making perfect binding bookbinding.

A first aspect of the present invention for solving the above problems is to provide a main body portion made of a plurality of paper-like materials and an adhesive portion formed on an end surface portion of the main body portion to bond the paper-like materials. The perfect binding is provided, wherein the adhesive portion is made of a material containing polyurethane and does not have a fixture for binding a paper-like material.

Here, the "paper-like material" includes not only paper but also paper-like (thin-film-like) materials such as wood and leather, those in which a plurality of papers are over-stitched (thread-overbound portion), and a plurality of papers. It also includes a member in which a plurality of papers are put together, such as a paper bound with a wire (thread binding portion) or a plurality of papers bound with a sewing machine (sewing binding portion).

In conventional bookbinding, the paper-like material cannot be fixed only by the adhesive part, and those skilled in the bookbinding industry did not even have such an idea, but the present inventor breaks the conventional concept and uses only the adhesive part. For the first time, it was discovered that the paper-like material can be fixed, and that it has excellent spreadability and sufficient durability (strength).

In such a first aspect, since the adhesive strength between the paper-like material and the adhesive portion is high and the adhesive portion has sufficient flexibility, it is possible to provide perfect binding with excellent spreadability and productivity. it can. Further, in this embodiment, since the number of production steps is smaller than that in the conventional bookbinding, the production efficiency can be improved.

A second aspect of the present invention is the perfect binding according to the first aspect, wherein the cover portion for wrapping the main body portion is not provided.

In such a second aspect, it is possible to provide perfect binding binding having excellent aesthetics and design, and having higher productivity.

A third aspect of the present invention is the perfect binding according to the first or second aspect, wherein the material containing polyurethane is a polyurethane hot melt adhesive.

Here, the "polyurethane hot melt adhesive" refers to an adhesive containing a thermoplastic polyurethane resin as a main component.

In such a third aspect, since the adhesive strength between the paper-like material and the adhesive portion is higher and the adhesive portion has sufficient flexibility, it is possible to provide perfect binding with better spreadability. ..

A fourth aspect of the present invention is any one of the first to third aspects, characterized in that a plurality of grooves are formed in the end face portion in a direction intersecting the paper surface of the paper-like material. It is in the perfect binding bookbinding described in 1.

In the fourth aspect, the adhesive strength between the paper-like material and the adhesive portion can be improved, so that the strength of bookbinding can be improved.

A fifth aspect of the present invention is the perfect binding according to any one of the first to fourth aspects, wherein the main body is made of paper-like materials having different thicknesses.

In such a fifth aspect, it is possible to provide perfect binding with excellent spreadability and high productivity even if the paper-like materials have different thicknesses.

A sixth aspect of the present invention is the perfect binding according to any one of the first to fifth aspects, wherein at least one thickness tp of the plurality of paper-like materials satisfies the following equation. ..
0.02 mm ≤ tp ≤ 3 mm

In such a sixth aspect, it is possible to provide perfect binding with excellent spreadability and high productivity even if the paper-like material has a thickness in the above range.

A seventh aspect of the present invention is the perfect binding according to any one of the first to sixth aspects, wherein the thickness tr of the adhesive portion satisfies the following equation.
0.1 mm ≤ tr ≤ 5 mm

In such a seventh aspect, it is possible to provide perfect binding with higher productivity.

In the eighth aspect of the present invention, the paper-like material is at least one of a plurality of papers bound by thread binding, a plurality of papers bound by wire, and a plurality of papers bound by a sewing machine. It is in the perfect binding bookbinding according to any one of the 1st to 7th aspects, which comprises.

In overlock binding in which a plurality of overlocking parts are combined, in binding in which a plurality of wire binding parts are combined, or in binding in which a plurality of sewing machine binding parts are combined, the width of the vicinity of the portion bound with a thread or wire is wide. There was a problem that it swelled in the direction.

In such an eighth aspect, it is possible to provide a bookbinding having a flat width direction without causing such a problem while having sufficient spreadability.

In the ninth aspect of the present invention, the adhesive portion is transparent or translucent, and at least a part of the end face portion on which the adhesive portion of the paper-like material is formed is colored, and when the book is bound, the pattern is displayed through the adhesive portion. It is in the perfect binding bookbinding according to any one of the 1st to 8th aspects.

In such a ninth aspect, it is possible to provide perfect binding binding with improved aesthetics and design of the bonded portion. Further, when a plurality of overlocking parts, wire binding parts or sewing machine binding parts are used as the paper-like material, the threads and wires used for them can be seen through the transparent or translucent adhesive parts, so that the adhesive parts can be seen. It is possible to provide a perfect binding bookbinding with improved aesthetics and design.

FIG. 1 is a schematic perspective view of perfect binding binding according to the first embodiment. FIG. 2 is a schematic side view of the bookbinding according to the first embodiment when the bookbinding is opened and viewed from the X direction. FIG. 3 is a schematic bottom view showing a manufacturing process of the perfect binding bookbinding according to the first embodiment. FIG. 4 is a table showing the results of tensile strength tests of Examples and Comparative Examples. FIG. 5 is a table showing the results of the spreadability test of Examples and Comparative Examples. FIG. 6 is a table showing the results of tensile strength tests of Examples having different thicknesses of the bonded portions. FIG. 7 is a table showing the results of the spreadability test of Examples having different thicknesses of the bonded portions. FIG. 8 is a schematic view showing a color state of the paper-like material according to the second embodiment. FIG. 9 is a schematic view of bookbinding according to the second embodiment when viewed from the back. FIG. 10 is a schematic view of conventional bookbinding when viewed from below when opened.

An embodiment of perfect binding according to the present invention will be described below with reference to the accompanying drawings. The present invention is not limited to the following embodiments.
(Embodiment 1)

FIG. 1 is a schematic perspective view of perfect binding binding according to the present embodiment. As shown in this figure, the bookbinding 1 is provided on a main body portion 10 formed by stacking a plurality of paper-like materials 11a to 11i having a rectangular shape and different thicknesses, and on a right side surface portion (end surface portion) of the main body portion. It is composed of an adhesive portion 20. The main body 10 is not provided with a cover or the like for wrapping the main body as used in ordinary bookbinding, and is also provided with threads and fixtures for fixing the paper-like materials 11a to 11i. Absent. That is, the bookbinding 1 has a structure in which the paper-like materials 11a to 11i can be fixed only by the adhesive portion 20.

The paper-like material is not particularly limited as long as it is a thin paper-like material. Examples of paper-like materials include Western paper (art paper, coated paper, matte paper, high-quality paper, medium-quality paper), Japanese paper, synthetic paper, paperboard (cardboard base paper, paperboard for paperware, miscellaneous paperboard), leather, synthetic leather, etc. Examples include wood and cloth.

Further, the thickness Tp of the paper-like material is not particularly limited, but a paper-like material having a thickness Tp in the range of 0.02 mm to 3 mm can be used, and the thickness Tp is in the range of 0.05 mm to 2 mm. It is preferable because it is easy to handle, and it is more preferable that the thickness Tp is in the range of 0.1 mm to 1 mm because it is easier to handle.

Next, the adhesive portion 20 is not particularly limited as long as it is made of a material containing polyurethane, but is made of a reactive polyurethane hot melt adhesive (resin) from the viewpoint of spreadability and durability (strength). Is preferable. Examples of the reactive polyurethane hot melt adhesive include urethane prepolymers having an isocyanate group which is a reaction product of a polyol and polyisocyanate.

Examples of the polyol include polyether polyols, polyester polyols, acrylic polyols, polycarbonate polyols, polybutadiene polyols, hydrogenated polybutadiene polyols, dimerdiols and the like.

Examples of the polyisocyanate include polyoxyethylene glycol, polyoxypropylene glycol, polyoxytetramethylene glycol, polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxytetramethylene glycol, and polyoxypropylene polyoxytetramethylene glycol. And so on.

The above-mentioned polyol and polyisocyanate may each be composed of one type or two or more types.

The thickness Tr of the adhesive portion 20 is not particularly limited as long as the adhesive strength (durability) with the main body portion 10 is sufficient, but the thickness Tr of the adhesive portion 20 may be in the range of 0.1 mm to 5 mm. For example, those having high productivity and sufficient adhesive strength are preferable, and those in the range of 0.2 mm to 2 mm are more preferable because they have higher productivity and sufficient adhesive strength, and those in the range of 0.2 mm to 1 mm. If this is the case, it is particularly preferable because the productivity is higher and the adhesive strength is sufficient.

Further, a plurality of grooves are formed in the right side surface portion of the main body portion 10 in a direction intersecting with the paper surface (direction in which the paper surfaces overlap). The distance between these grooves is not particularly limited, but if it is constant, the adhesive strength between the paper-like material and the adhesive portion is improved, which is preferable. The depth of the groove is also not particularly limited.

Further, the shape of the groove is not particularly limited, but if it is formed in the direction perpendicular to the paper surface of the paper-like material from the front cover to the back cover, the adhesive strength between the paper-like material and the adhesive portion can be improved. Preferably, the adhesive strength between the paper-like material and the adhesive portion is improved when the paper-like material is formed in a direction intersecting the paper surface (the intersection angle is smaller than 90 degrees) from the front cover to the back cover. It is more preferable because it can be caused.

In the bookbinding 1 configured in this way, as shown in FIG. 2, since the adhesive portion 20 bends when the bookbinding 1 is opened, there is no throat portion as in the conventional bookbinding, and sufficient spreadability is provided. Will have. In FIG. 2, the adhesive portion 20 is enlarged and drawn in order to make it easier to understand the state when the bookbinding 1 is opened, but in reality, when viewed from the spread surface side direction Y, the paper 11f and the paper 11g are drawn. The adhesive portion 20 between them is almost invisible, and the paper 11f and the paper 11g appear to be connected as if they were one piece of paper.

Further, although the bookbinding 1 is composed of papers 11a to 11i having different thicknesses, it has excellent spreadability and sufficient durability regardless of which paper portion is spread. ing.

Next, the manufacturing method of bookbinding 1 will be described. As shown in FIG. 3, although the thickness is different, the same rectangular papers 11a to 11i are bundled to form the main body portion 10 (FIG. 3A). Next, at least one of roughening, milling, and notching is applied to the left side surface portion of the main body portion 10 (the side surface portion to which the reactive polyurethane hot melt adhesive or the like described later is applied).

Then, using a brush, a roller, a nozzle, or the like, a material containing polyurethane such as a reactive polyurethane hot melt adhesive is applied so as to have a thickness of 0.5 mm (FIG. 3 (b)). Bookbinding 1 can be produced by allowing the material containing polyurethane to be cured by leaving it in that state for 12 to 48 hours.

As described above, the bookbinding 1 according to the present embodiment can be easily manufactured with a small number of man-hours. Further, since the bookbinding 1 can be manufactured without using a special tool, the productivity is higher than that of the conventional bookbinding.
<Tensile strength test and spread test>

Prepare 60 sheets each of two types of A4 size paper (high quality paper (81.5 g / m ² ) and high quality paper (104.7 g / m ² )) with different thicknesses, and use a reactive polyurethane hot melt adhesive as an adhesive. (Manufactured by Taiyo Seiki Co., Ltd .: HMR-115) was used to bind the book as described above to prepare Example 1 (without cover) and Example 2 (without cover), respectively. In addition, A3 size paper with a thickness of 0.11 mm was used for binding the bound material, which was made of high- ^{quality paper (81.5 g / m 2} ) using a reactive polyurethane hot melt adhesive. The bookbinding composed of (104.7 g / m ² ) was attached so as to wrap A3 size paper having a thickness of 0.18 mm, respectively, to prepare Example 1 (with a cover) and Example 2 (with a cover), respectively. ..

In addition, bookbinding was performed in the same manner as in Example 1 (with cover) and Example 2 (with cover), except that an ethylene-vinyl acetate resin (manufactured by Taiyo Seiki Co., Ltd .: Horizon Melt HM-221) was used as the adhesive. Then, Comparative Example 1 and Comparative Example 2 were prepared, respectively.

Tensile strength tests were performed on these examples and comparative examples. Specifically, as a tensile strength test, after binding (binding with 60 sheets of paper), two sheets of paper (tensile paper) arranged in the center (30th and 31st sheets) are exposed. Bend the bookbinding. Then, a person grips the tip of one tension paper, another person grips the tip of the other tension paper, and the tip of one tension paper is pulled in the opposite direction of the other tension paper. A strength test was performed. The result is shown in FIG.
Here, "○" indicates that there is sufficient strength, and "x" indicates that there is no strength that can withstand use.

As can be seen from this figure, the bookbinding according to the present invention (Example 1 and Example 2) has a paper thickness as compared with the bookbinding using an ethylene-vinyl acetate resin-based resin (Comparative Example 1 and Comparative Example 2). It was found that there is sufficient strength even if the resin (Tp) changes.

In addition, in order to investigate the spreadability of the bookbinding according to the present invention, the spread angle when each Example and Comparative Example was opened was examined. As a spread test, specifically, when binding (binding with 60 sheets of paper), two sheets of paper (tensile paper) arranged in the center (30th and 31st sheets) are exposed. As you can see, fold the bookbinding. An A4 size weight weighing 3.5 kg was placed there for 1 minute on the spread portion (the portion where the tension papers are joined) of the spread binding. After that, the weight was removed, and the angle (spread angle (°)) formed by the two tension sheets at the spread portion was measured using a protractor. The result is shown in FIG.

As can be seen from this figure, the bookbinding according to the present invention (Example 1 and Example 2) has a paper thickness as compared with the bookbinding using an ethylene-vinyl acetate resin-based resin (Comparative Example 1 and Comparative Example 2). It was found that even if the resin (Tp) was changed, it had a high spread property.

Next, in order to investigate the relationship between the thickness (Tr) of the bonded portion and the tensile strength, a similar tensile strength test was performed. Specifically, a bookbinding product in which the thickness (Tr) of the adhesive portion and the thickness (Tp) of the paper used are changed, and a product with the same cover as the one described above are produced and loaded on them. The load was measured when the bookbinding was torn (broken). The result is shown in FIG.

As can be seen from this figure, it was found that if the thickness of the bonded portion is in the range of 0.3 mm to 1.0 mm, there is sufficient tensile strength. In particular, it was found that when the thickness of the bonded portion was in the range of 0.5 mm to 1.0 mm, it had a very high tensile strength.

In addition, the spreadability test described above was performed on a part of these bookbindings. The result is shown in FIG.

As can be seen from this figure, it was found that the bookbinding according to the present invention has a sufficient spread property, and particularly the bookbinding having no cover has a very high spread property. It was also found that the thicker the paper, the higher the spreadability.
(Embodiment 2)

In the first embodiment, the side surface portion of the main body portion is not colored at all, but the present invention is not limited to this. For example, as shown in FIG. 8, a part of the side surface portion where the adhesive portion of each paper-like material (for example, paper 11D) constituting the main body portion is formed is colored, and the main body portion is configured as shown in FIG. At that time, characters and patterns may be formed. The adhesive portion is preferably made of a transparent or translucent material. When the adhesive portion is transparent or translucent, the characters and patterns formed on the side surface portion of the main body portion on the adhesive portion side can be seen through the adhesive portion.

By configuring the bookbinding 1A in this way, the aesthetic appearance and design of the bookbinding 1A can be improved.
(Other embodiments)

In the above-described embodiment, roughening, milling, notching and the like are applied to the left side surface portion of the main body portion 10, but the present invention is not limited to this. For example, it is not necessary to perform these processes on the left side surface portion of the main body portion. The bookbinding according to the present invention has a strong tensile strength, but when a load is applied to only one corner of the paper-like material provided with the adhesive portion, the paper-like member can be easily separated. It has become.

Then, the paper-like member that has not been roughened or the like can be separated in a state where the end surface provided with the adhesive layer is clean (smooth). When the material that has been roughened or the like is separated, the surface of the end portion provided with the adhesive portion becomes rough.

Further, in the above-described embodiment, the book is bound so as not to have a so-called front cover (including a back cover), but the present invention is not limited to this. For example, a cover that does not adhere to the adhesive portion (one that is stronger than the paper-like material or one that has a higher design) may be provided on the front surface and the back surface of the bookbinding. By constructing the bookbinding in this way, the aesthetic appearance and design of the bookbinding can be improved.

Further, in the above-described embodiment, one sheet of paper or the like is used as the paper-like material, but the present invention is not limited to this. As the paper-like material, for example, a plurality of papers are overlocked (thread overlocking part), a plurality of papers are wire-bound (wire binding part), or a plurality of papers are sewing-bound (sewing machine binding). A member in which a plurality of papers are put together may be used as in the part). It should be noted that, although there have been conventionally those in which only one copy of these is bound, the present invention is in which a plurality of these members are bound together.

In overlock binding in which a plurality of overlocking parts are combined, in binding in which a plurality of wire binding parts are combined, or in binding in which a plurality of sewing machine binding parts are combined, the width of the vicinity of the portion bound with a thread or wire is wide. Although there is a problem that it swells in the direction, the present invention can provide a perfect binding bookbinding having a flat width direction without causing such a problem while having sufficient spreadability. ..

Further, when the adhesive portion is transparent or translucent, the threads and wires used for them can be seen through the adhesive portion, so that it is possible to provide perfect binding with improved aesthetics and design of the adhesive portion. ..

1, 1A Bookbinding 10 Main body 11a, 11b, 11c, 11d, 11e, 11f, 11g, 11h, 11i, 11D
20 Adhesive part

Claims (9)

The main body made of multiple paper-like materials and
An adhesive portion formed on the end face portion of the main body portion to adhere the paper-like material, and an adhesive portion.
It is a perfect binding bookbinding equipped with
The adhesive portion is made of a material containing polyurethane.
It does not have a fixture for binding the paper-like material,
The paper-like material includes at least one of a plurality of papers bound by thread, a plurality of papers bound by wire, and a plurality of papers bound by a sewing machine.
Perfect binding that is characterized by this. The main body made of multiple paper-like materials and
An adhesive portion formed on the end face portion of the main body portion to adhere the paper-like material, and an adhesive portion.
It is a perfect binding bookbinding equipped with
The adhesive portion is made of a material containing polyurethane.
It does not have a fixture for binding the paper-like material,
The adhesive portion is transparent or translucent,
At least a part of the end face portion on which the adhesive portion of the paper-like material is formed is colored so that a pattern is displayed through the adhesive portion when binding.
Perfect binding that is characterized by this. The adhesive portion is transparent or translucent,
At least a part of the end face portion on which the adhesive portion of the paper-like material is formed is colored so that a pattern is displayed through the adhesive portion when binding.
The perfect binding according to claim 1. The perfect binding according to any one of claims 1 to 3, wherein the bookbinding portion does not have a cover portion for wrapping the main body portion. The perfect binding according to any one of claims 1 to 4, wherein the material containing polyurethane is a polyurethane hot melt adhesive. The perfect binding according to any one of claims 1 to 5 , wherein a plurality of grooves are formed in the end face portion in a direction intersecting the paper surface of the paper-like material. Said body portion, perfect binding according to any one of claim 1 to 6, characterized in that the thickness is made up of different said paper-like material. The perfect binding according to any one of claims 1 to 7 , wherein at least one thickness tp of the plurality of paper-like materials satisfies the following equation.
0.02 mm ≤ tp ≤ 3 mm The perfect binding according to any one of claims 1 to 8 , wherein the thickness tr of the adhesive portion satisfies the following equation.
0.1 mm ≤ tr ≤ 5 mm

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