JP5886564B2 - Sheet bundle manufacturing method - Google Patents

Description

  The present invention relates to a sheet binding method and a binding member.

  A stapler using a U-shaped staple generally binds a sheet bundle by using a metal needle staple to fold a U-shaped leg portion into the sheet bundle and bend it so as to sandwich the sheet bundle. However, when the sheet bundle bound with the metal needle is shredded, the shredder machine may be damaged by the metal needle. Further, since the metal needle is exposed on the surface of the sheet bundle, the thickness of the metal needle may increase in the binding portion.

  On the other hand, Patent Document 1 proposes a U-shaped staple made of paper and a hot melt type adhesive applied to the inner side surface of the leg. This staple is driven using a specific stapler while punching a document with a cutter provided in the stapler. Further, in the staple cradle provided in the stapler, the staple is heated by the heater, and the adhesive on the inner surface of the leg portion of the staple is melted and strongly adhered to the lower surface of the document.

  However, in Patent Document 1, it is difficult to cope with a thick document because the staple is formed in a U-shape in advance. Further, since the staple base material is made of paper, the mechanism for bending the staple legs tends to be complicated.

  As a booklet that is a robust thread binding that is difficult to fray, Patent Document 2 discloses a thread-binding booklet in which a sewing machine is sewn with an upper thread and a lower thread, and the upper thread and / or the lower thread are made of a heat-meltable material. There has been proposed one in which the intersecting portion and / or the overlapping portion of the yarn and the lower yarn are melt-fixed.

  However, in Patent Document 2, since a sewing machine is sewn with an upper thread and a lower thread, a complicated mechanism is likely to occur. In addition, since the yarn is tightly bound, it is difficult to remove the yarn, and it may take time to replace the document.

  On the other hand, when an ink image is formed at a location where sheets are bound, a binding member such as a staple or a thread may deteriorate and a sufficient strength may not be obtained. For example, when a portion where an ink image is formed with non-aqueous ink is bound with a resin binding member, the resin of the binding member may be dissolved and deteriorated by a solvent or the like contained in the ink.

JP 2002-168216 A JP 2003-226080 A

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sheet binding method and a binding member that are suitable for a shredder process, reduce the thickness of a binding portion, and have excellent ink resistance.

As one aspect of the present invention, a hole is formed in a plurality of sheets, a binding member including a thermoplastic resin having a unit represented by the following general formula (1) is disposed in the hole, and the hole is It is a sheet | seat binding method including the process of heat-bonding the said binding member arrange | positioned and binding these sheets.

  [In General Formula (1), R is an arbitrary divalent group; X is a divalent or higher valent hetero atom. ]

As another aspect of the present invention, holes are formed in a plurality of sheets, a binding member is disposed in the holes, the binding members disposed in the holes are heat-bonded, and the plurality of sheets are bound. It is a binding member used for a sheet binding method including a process, and includes a thermoplastic resin having a unit represented by the following general formula (1).

  [In General Formula (1), R is an arbitrary divalent group; X is a divalent or higher valent hetero atom. ]

  According to the present invention, it is possible to provide a sheet binding method and a binding member that are suitable for a shredder process, reduce the thickness of a binding portion, and have excellent ink resistance.

FIG. 1 is an explanatory diagram for explaining an example of a sheet binding method according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a sheet bundle bound by another example of a sheet binding method according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a sheet bundle bound by another example of a sheet binding method according to an embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of a sheet bundle bound by another example of a sheet binding method according to an embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a sheet bundle bound by another example of a sheet binding method according to an embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a sheet bundle bound by another example of a sheet binding method according to an embodiment of the present invention. FIG. 7 is a schematic plan view of a sheet bundle bound by another example of the sheet binding method according to the embodiment of the present invention. FIG. 8 is an explanatory diagram for explaining an example of taking out and inserting a sheet in the sheet binding method according to the embodiment of the present invention. FIG. 9 is a schematic cross-sectional view of a printer and a sheet post-processing apparatus according to an embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of a sheet binding device according to an embodiment of the present invention. FIG. 11 is an explanatory diagram for explaining an example of processing steps of the sheet binding device according to the embodiment of the present invention.

  Hereinafter, although the embodiment concerning the present invention is described, the illustration in this embodiment does not limit the present invention.

  As a sheet binding method according to the present embodiment, holes are formed in a plurality of sheets, a binding member including a predetermined thermoplastic resin is disposed in the holes, and the binding members disposed in the holes are heat bonded to each other. And a step of binding the sheets. Accordingly, it is possible to provide a sheet binding method that is suitable for a shredder process, has a thin binding portion, and is excellent in ink resistance.

The binding member includes a thermoplastic resin having a unit represented by the following general formula (1).

  [In General Formula (1), R is an arbitrary divalent group; X is a divalent or higher valent hetero atom. ]

  The arbitrary divalent group represented by R is not particularly limited, and may be saturated or unsaturated, branched, chained or cyclic, substituted or unsubstituted. May be. R may have a hetero atom in the main chain or branched chain.

  Examples of the divalent or higher hetero atom represented by X include N (nitrogen), O (oxygen), and S (sulfur), but are not limited thereto. When the hetero atom represented by X is trivalent or more, an arbitrary substituent such as a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted aryl group is substituted. Can have. By having a hetero atom in the main chain, it is presumed that the solubility in non-aqueous ink is lowered and the adhesiveness can be sufficiently maintained.

  As the thermoplastic resin of the present embodiment, a polyurethane resin, a polyester resin, a polyurea resin, a polyamide resin, a polycarbonate resin, or the like can be used, and these may be used in combination. In particular, a polyurethane resin and / or a polyester resin in which X = O in the general formula (1) is preferable because the heat melting temperature is relatively low.

  Examples of the commercially available thermoplastic resin of the present embodiment include Superflex 150, 210, 300, 420, 460, 470, 740, 800, 830, 840, 860, 870, E2000, and E4000 (polyurethane resin, Dai-Ichi Kogyo Seiyaku Co., Ltd.), Vylonal MD-1100, MD-1335 (polyester resin, manufactured by Toyobo Co., Ltd.) and the like can be used.

  Since the thermoplastic resin of the present embodiment described above has a hetero atom in the main chain, it has a characteristic that it is difficult to dissolve in a non-aqueous solvent. In particular, binding is performed at a portion of the sheet where an image is formed using non-aqueous ink. Adhesive strength can be sufficiently obtained even when the members are heat-bonded. On the other hand, polyethylene resins and ethylene / vinyl acetate copolymer resins are easily affected by non-aqueous solvents, and there is a problem that the resin deteriorates and the adhesive strength decreases during or after heat bonding.

  As a thermoplastic resin of this embodiment, it is preferable that the heat melting temperature is in the range of 70 to 200 ° C. More preferably, it is 90-180 degreeC. If the heat melting temperature is too high, the sheet is damaged by heat and the energy required for the treatment is increased, so that it is preferably 200 ° C. or lower, more preferably 180 ° C. or lower. On the other hand, when the heat melting temperature is low, the heat resistance of the sheet bundle is lowered, so that it is preferably 70 ° C. or higher, more preferably 90 ° C. or higher.

  As the binding member, in addition to the above-described thermoplastic resin of the present embodiment, a normal thermoplastic resin can be appropriately selected and used as long as the function and effect thereof are not impaired. As a normal thermoplastic resin, for example, polyolefin, ethylene / vinyl acetate copolymer resin, ethylene / acrylic acid copolymer resin, ethylene / ethyl acrylate copolymer resin, vinyl acetate resin and the like can be used. In this case, the thermoplastic resin of the present embodiment is preferably 30 to 100% by mass with respect to the entire resin contained in the binding member.

  As other optional components, a plasticizer, an antioxidant, a light stabilizer, an ultraviolet absorber, an antistatic agent, a flame retardant, a lubricant, and the like may be added to the binding member.

  Hereinafter, the sheet binding method according to the present embodiment will be described with reference to the drawings. FIG. 1 is an explanatory diagram for explaining an example of a sheet binding method according to the present embodiment. In FIG. 1, 1 is a sheet bundle, and 2 is a binding member.

  In FIG. 1 (a), an arbitrary number of sheets are stacked to form a sheet bundle 1. In FIG. 1 (b), a hole 3 is formed through the sheet bundle 1 in the thickness direction. In FIG. The binding member 2 is inserted into the hole 3, one end of the binding member 2 is exposed on one surface of the sheet bundle 1, and the other end of the binding member 2 is exposed on the other surface of the sheet bundle 1. The binding member 2 is arranged so that both ends are directed in opposite directions. In FIG. 1D, the binding member 2 arranged in the hole 3 is cured by heating from one side or both sides of the sheet bundle 1. Then, the binding member 2 bonds the hole 3 of the sheet bundle 1 and the periphery of the hole 3 on both sides of the sheet bundle 1 to bind a plurality of sheets. Here, the binding member 2 includes a thermoplastic resin having a unit represented by the general formula (1).

  The opening shape of the hole can be arbitrarily selected from a circle, an ellipse, a polygon such as a rectangle and a triangle, and a star. Moreover, as a hole part, as shown in FIG. 1, you may penetrate and form in the direction orthogonal to a sheet surface, and as shown in FIG. 2, it is in the direction inclined at 45-90 degrees with respect to the sheet surface. It may be formed through. As shown in FIG. 2, the hole is inclined, so that when the plurality of sheet bundles are stacked, the exposure position of the binding member is shifted between adjacent sheet bundles, and the resin is prevented from contacting and bonding. be able to. Further, as shown in FIG. 1, the hole diameter of the hole portion may be made equal in the thickness direction, and although not shown, the hole diameter of the hole portion may be made smaller or larger in the thickness direction.

  In FIG. 1, the cross-sectional shape of the binding member may be any shape that can be inserted into the hole, and can be arbitrarily selected from a circular shape, an elliptical shape, a polygonal shape such as a rectangular shape and a triangular shape, and a star shape. The binding member preferably has a shape that can be bonded to the inner wall of the hole when melted by heat bonding. Further, as shown in FIG. 1, the binding member is arranged so that both ends of the thread-like binding member are left on both surfaces of the sheet bundle, and the sheet bundle is bonded to both surfaces of the sheet bundle together with the wall surface of the hole. Alternatively, as shown in FIG. 3, one or both of both ends of the thread-like binding member may be disposed at the opening end of the hole of the sheet bundle, and the sheet bundle may be bonded to the wall surface of the hole. Further, the thread-like binding member may be cut in advance, or may be cut while being inserted into the hole of the sheet bundle.

The size of the holes is not particularly limited, for example, the area of the opening shape can be 0.7~320mm ^2. When the opening shape of the hole is circular, the hole diameter of the hole can be within 10 mm, and more preferably within 5 mm, from the viewpoint of appearance and handleability of the sheet bundle.

  The dimension of the binding member is not particularly limited as long as it is a shape that can be arranged in the hole, but for example, the cross-sectional shape can be fitted with the cross-sectional shape of the hole, or the hole can be inserted with a gap. It can be a shape. In order to prevent the sheet bundle from shifting, the gap between the hole and the binding member disposed in the hole is preferably small, preferably within 1 mm, and more preferably within 0.5 mm. As an example, the diameter of the binding member is preferably the same as or larger than a circle with a diameter of 0.5 mm, more preferably the same as or larger than the circle with a diameter of 1 mm, from the viewpoint of handling. Further, the diameter of the binding member is preferably the same as or smaller than the circle having a diameter of 10 mm, and more preferably the same or smaller than the circle having a diameter of 5 mm, from the viewpoint of appearance and handling of the sheet bundle.

  As the heat bonding, at least a part of the binding member may be heated. For example, the binding member can be heated from one or both of the sheet bundles. The heating temperature is preferably 200 ° C. or lower, more preferably 180 ° C. or lower in order to avoid damage to the sheet bundle. Further, from the viewpoint of heat resistance of the sheet bundle, it is preferably 70 ° C. or higher, more preferably 90 ° C. or higher. Further, the binding member may be pressed from one or both of the sheet bundles to be pressure-bonded, and the pressing pressure can be 0 to 0.3 MPa.

  The heating time is preferably within 5 seconds, and more preferably within 3 seconds from the viewpoint of productivity. If the heating time is short, the heat is not sufficiently transmitted, so it is necessary to keep the heating mechanism at an excessively high temperature, which is not preferable from the viewpoint of environmental load. Therefore, the heating time is preferably 0.3 seconds or longer.

  As shown in FIG. 1, by binding the sheet bundle, the binding member is made of resin, which is suitable for the shredder process, and the binding member on the surface of the sheet bundle can be formed thin by heat bonding, so the thickness of the binding portion is reduced. Can do. Further, since the binding member contains the specific resin described above, even if an ink image is formed on the binding portion, deterioration of the binding member can be prevented and sufficient strength can be obtained. Further, by adjusting the length of the thread-like binding member, it is possible to bind sheet bundles having various thicknesses.

  Further, as shown in FIG. 1, by placing the binding member in the hole before heating the binding member and heat-bonding the binding member arranged in the hole, the heating amount can be increased when the binding member is heat-bonded. Can be reduced. For example, the surface of the binding member and the wall of the hole of the sheet may be bonded, and only a part of the binding member is heated to melt the surface of the binding member and bond to the wall of the hole of the sheet. Thus, the amount of heating can be further reduced. On the other hand, in the method in which the resin is melted in advance and the molten resin is poured into the holes, a larger heating amount is required.

  Other examples of the sheet binding method according to the present embodiment are shown in FIGS.

  In FIG. 4, two hole portions 3 are formed, and the thread-like binding member 2 is inserted from one surface of the sheet bundle 1 through one hole portion 3, and then the other hole portion from the other surface of the sheet bundle 1 is inserted. 3, the both ends of the thread-like binding member 2 are bent so as to contact one surface of the sheet bundle 1, and the binding member 2 is arranged. As a result, the sheet bundle can be bound more firmly. In FIG. 4, holes may be formed at three or more locations, and thread-like binding members may be inserted into the holes. Further, as shown in FIG. 5, the end of the thread-like binding member 2 may be arranged so as to intersect on one surface of the sheet bundle 1. As a result, it is possible to more reliably prevent the binding member from falling off.

  In FIG. 6, one hole portion 3 is formed, the thread-like binding member 2 is inserted into the hole portion 3 and arranged in a ring shape, and the ring-shaped connecting portion of the hole portion 3 is heated and bonded to form a sheet bundle. 1 is bound.

  In FIG. 7, when the binding member 2 is heated and melted and fixed, an uneven shape (“XYZ” in FIG. 7) is formed on the exposed surface of the binding member 2. Thereby, arbitrary information can be given to the sheet bundle 1 and design properties can be given.

  In the above configuration, the sheet bundle is bound at one place, but the sheet bundle may be bound at a plurality of places. Further, the portion where the sheet bundle is bound is preferably around the edge of the sheet, and may be around the corner of the sheet.

  According to the sheet binding method according to the present embodiment, it is possible to more easily insert another sheet into the sheet bundle or take out some sheets from the sheet bundle.

  FIG. 8 is an explanatory diagram for explaining an example of insertion and removal of a sheet.

  In FIG. 8 (a), the scissors 4 are inserted into one side of the sheet to be taken out of the sheet bundle 1 to cut the binding member 2, and the scissors are put on the other side of the sheet to be taken out in the same manner (not shown). One sheet can be taken out by inserting and cutting the binding member. At this time, since each separated sheet bundle 1 is bonded to the wall surface of the hole by the binding member 2, the bound state is maintained. In FIG. 8B, a replacement sheet 1 a is inserted between the separated sheet bundles 1. Here, a hole 3 a having the same shape as the hole 3 of the sheet bundle 1 is formed in the replacement sheet 1 a, and the replacement sheet 1 a is arranged with the hole 3 a aligned with the hole 3 of the sheet bundle 1. . In FIG.8 (c), the cut surface of the binding member 2 is heat-melted with the heating members 5, such as a heated iron piece. In FIG. 8D, the sheet bundle 1 can be bound again by removing the heating member and then crimping the cut binding member 2 so that the cut binding surfaces meet each other.

  Hereinafter, the sheet binding apparatus will be described with reference to the drawings.

  FIG. 9 is a schematic cross-sectional view of the printer A and the sheet post-processing apparatus B. In FIG. 9, A is a printer for forming an image on a sheet, and B is a sheet post-processing apparatus connected to the printer A for conveying and discharging the sheet. The sheet post-processing apparatus B includes a sheet binding apparatus 100 that binds a sheet bundle, a conveyance path 200 that conveys a sheet discharged from the printer A to the sheet binding apparatus 100, and a sheet bundle 1 that is discharged from the sheet binding apparatus 100. Is provided, and a bypass path 400 for discharging a sheet discharged from the printer A without passing through the sheet binding device 100.

  FIG. 10 is a schematic sectional view of the sheet binding apparatus 100 shown in FIG. In FIG. 10, a sheet binding device 100 includes a sheet tray 10 for stacking and storing sheets to be conveyed, and a punching member 11 for punching holes 3 in a sheet bundle 1 stored in the sheet tray 10. , A binding member accommodating portion 12 for accommodating the binding member 2, a conveyance path 13 for conveying the binding member 2 from the binding member accommodating portion 12 to the punching portion, and a cutting for cutting the binding member 2 at the punching portion. A member 14 and heating members 15a and 15b for heat-bonding the binding member 2 at the perforated portion are provided.

  The sheet tray 10 is provided on one side surface of the sheet tray 10, and an opening 10 a that can be inserted to move the tip of the punching member 11 to the punching portion in the sheet tray 10, and the lower surface of the sheet tray 10. The front end portion of the punching member 11 includes an opening 10 b that can project from the lowermost surface of the sheet bundle 1 when the hole 3 is formed in the sheet bundle 1.

  The piercing member 11 is formed of a puncher or the like, and has a sharp blade at the tip, and is arranged to be rotatable by a drive unit (not shown) with the rotation shaft 11a as a base point. It moves from the opening 10a of 10 to the punching part of the sheet bundle 1 and is arranged so as to penetrate the sheet bundle 1 to form the hole 3. The punching member 11 may be disposed at a plurality of locations corresponding to the storage position of the sheet bundle 1 stored in the sheet tray 10, and the punching member 11 is disposed so as to be movable within the storage position of the sheet bundle 1. Then, the sheet bundle 1 may be punched at a desired binding position.

  The binding member accommodating portion 12 accommodates the thread-like binding member 2 in a wound state. The binding member accommodating portion 12 may be detachably disposed as a cartridge from the sheet binding device 100. The binding member 2 in the binding member accommodating portion 12 can be conveyed to the punching portion of the sheet bundle 1 by using the conveyance roller 13a through the conveyance path 13.

  The cutting member 14 is disposed on the topmost sheet in a state where the sheet bundle 1 is stacked on the sheet tray 10 and is disposed so as to be movable in the horizontal direction so as to cut the binding member 2 at the punching portion. The cutting member 14 may be fixedly disposed at a vertical position that does not interfere with the sheet bundle 1 in a state where the sheet bundle 1 is maximally stacked on the sheet tray 10. The position of the outermost surface may be detected and disposed so as to be movable to a vertical position that does not interfere with the sheet bundle 1. The cutting member 14 is composed of a cutter or the like, and may move in the horizontal direction to cut the binding member 2 at the perforated portion, or may operate and cut like a scissors after moving horizontally.

  The heating member 15 is composed of a heater or the like, and includes a heating member 15 a disposed above the sheet bundle 1 accommodated in the sheet tray 10 and a heating member 15 b disposed below. Similar to the cutting member 14, the cutting member 14 may be arranged so as to be movable in the horizontal direction, may be arranged so as to be fixed in the vertical direction, or may be arranged so as to be movable according to the stacking amount of the sheet bundle 1. Moreover, you may make it arrange | position the heating member 15 only in any one of upper direction or the downward direction.

  Next, processing steps of the sheet binding device 100 will be described with reference to FIG. FIG. 11 is an explanatory diagram for explaining processing steps of the sheet binding device 100.

  In FIG. 11A, a plurality of sheets are aligned and stacked on the sheet tray 10.

  In FIG. 11B, the punching member 11 is rotated in the X direction in the figure with the rotation axis 11 a as a base point, and the leading end of the punching member 11 hits the sheet bundle 1 and penetrates in the thickness direction of the sheet bundle 1. Hole 3 is formed. At this time, the sheet waste cut out by the punching member 11 is collected in the punching member box 16.

  In FIG. 11 (c), the punching member 11 is returned to its original position by rotating in the opposite direction, and then the binding member 2 is moved from the binding member housing portion 12 through the transport path 13 using the transport roller 13 a. The binding member 2 is further inserted into the hole 3 and arranged.

  In FIG. 11 (d), the cutting member 14 is moved horizontally in the punching portion direction Y, and the binding member 2 is cut around the opening edge portion at the top of the hole portion 3.

  In FIG. 11 (e), after the cutting member 14 is moved back in the opposite direction and returned to its original position, the heating members 15a and 15b are moved horizontally in the perforated portion direction Z, and the upper and lower portions of the hole 3 are moved. The binding member 2 is heated from both ends by being positioned around the opening edge. At this time, the heating members 15a and 15b may start heating when they move horizontally, or may be in a heated state in advance.

  In FIG. 11 (f), the binding member 2 is heated from both ends by the heating members 15a and 15b to be melted and cured to bind the sheet bundle 1, and the heating members 15a and 15b are horizontally moved in opposite directions. It has been returned to its original position.

  Hereinafter, a non-aqueous ink will be described as an image ink formed on a sheet. The non-aqueous ink is not particularly limited, but includes a non-aqueous solvent, a pigment or a dye, and may appropriately include a pigment dispersant and other additives.

  Examples of the pigment include organic pigments such as azo, phthalocyanine, dye, condensed polycyclic, nitro, and nitroso (brilliant carmine 6B, lake red C, watching red, disazo yellow, hanza yellow, phthalocyanine blue, Phthalocyanine green, alkali blue, aniline black, etc.); metals such as cobalt, iron, chromium, copper, zinc, lead, titanium, vanadium, manganese, nickel, metal oxides and sulfides, and ocher, ultramarine, bitumen, etc. Carbon blacks such as inorganic pigments, furnace carbon black, lamp black, acetylene black and channel black can be used. Any one of these pigments may be used alone, or two or more of these pigments may be used in combination.

  The average particle diameter of the pigment is preferably 300 nm or less, and more preferably 150 nm or less, from the viewpoints of dispersibility and storage stability. Here, the average particle diameter of the pigment is a value measured by a dynamic light scattering particle size distribution analyzer LB-500 manufactured by Horiba, Ltd.

  The content of the pigment in the ink is usually 0.01 to 20% by weight, and preferably 3 to 15% by weight from the viewpoint of printing density and ink viscosity.

  When a pigment is used, a pigment dispersant can be blended. The pigment dispersant to be blended is not particularly limited as long as the pigment is stably dispersed in the solvent. For example, hydroxyl group-containing carboxylic acid ester, long chain polyaminoamide and high molecular weight acid ester salt, high molecular weight polycarboxylic acid salt, long chain polyaminoamide and polar acid ester salt, high molecular weight unsaturated acid ester, high molecular weight copolymer , Modified polyurethane, modified polyacrylate, polyether ester type anionic activator, naphthalene sulfonic acid formalin condensate salt, polyoxyethylene alkyl phosphate ester, polyoxyethylene nonyl phenyl ether, polyester polyamine, stearylamine acetate, etc. Of these, the use of a polymer dispersant is preferred. These may be used alone or in combination of two or more.

  The blending amount of the pigment dispersant in the ink can be set as appropriate, but from the viewpoint of pigment dispersibility, the weight ratio is preferably about 0.05 to 1.0 part with respect to 1 part of the pigment, 0.1 More preferably, it is -0.7 part. The pigment dispersant is preferably contained in an amount of about 0.5 to 10% by weight, more preferably 1 to 5% by weight, based on the total amount of ink.

  As the dye, for example, oil-soluble dyes such as azo, anthraquinone, and azine can be used. Any one of these dyes may be used alone, or two or more of these dyes may be used in combination. These dyes may be used together with the above-described pigment.

  The non-aqueous solvent is a non-polar organic solvent or a polar organic solvent having a 50% distillation point of 150 ° C. or higher. The 50% distillation point means a temperature at which 50% by weight of a solvent is volatilized, which is measured according to JIS K0066 “Testing method for distillation of chemical products”.

  For example, preferred examples of the nonpolar organic solvent include aliphatic hydrocarbon solvents, alicyclic hydrocarbon solvents, aromatic hydrocarbon solvents and the like. Examples of the aliphatic hydrocarbon solvent and alicyclic hydrocarbon solvent include “Tclean N-16, Tclean N-20, Tclean N-22, Nisseki Naphthezol L, Nisseki, manufactured by JX Nippon Mining & Energy Corporation. Naphthezol M, Nisseki Naphthezol H, No. 0 Solvent L, No. 0 Solvent M, No. 0 Solvent H, Nisseki Isosol 300, Nisseki Isosol 400, AF-4, AF-5, AF-6, AF-7 ", Preferable examples include “Isopar G, Isopar H, Isopar L, Isopar M, Exxsol D40, Exxsol D80, Exxsol D100, Exxsol D130, Exxsol D140” manufactured by Exxon. Preferred examples of the aromatic hydrocarbon solvent include “Nisseki Cleansol G” (alkylbenzene) manufactured by JX Nippon Oil & Energy Corporation, “Solvesso 200” manufactured by Exxon, and the like.

  As the polar organic solvent, ester solvents, alcohol solvents, higher fatty acid solvents, ether solvents, and mixed solvents thereof can be used. For example, selected from the group consisting of an ester solvent that is an ester of a higher fatty acid having 8 to 20 carbon atoms and an alcohol having 1 to 24 carbon atoms, a higher alcohol having 8 to 24 carbon atoms, and a higher fatty acid having 8 to 20 carbon atoms. One or more of them can be preferably used.

  More specifically, as polar organic solvents, methyl laurate, isopropyl laurate, isopropyl myristate, isopropyl palmitate, isostearyl palmitate, methyl oleate, ethyl oleate, isopropyl oleate, butyl oleate, methyl linoleate , Isobutyl linoleate, ethyl linoleate, isopropyl isostearate, soybean oil methyl, soybean oil isobutyl, tall oil methyl, tall oil isobutyl, diisopropyl adipate, diisopropyl sebacate, diethyl sebacate, propylene glycol monocaprate, tri-2-ethyl Ester solvents such as trimethylolpropane hexanoate and glyceryl tri-2-ethylhexanoate; isomyristyl alcohol, isopalmityl alcohol, isostearyl Alcohol solvents such as alcohol, oleyl alcohol, hexyl decanol, octyldodecanol, decyltetradecanol; higher fatty acid solvents such as nonanoic acid, isononanoic acid, isomyristic acid, hexadecanoic acid, isopalmitic acid, oleic acid, isostearic acid; Preferable examples include ether solvents such as diethyl glycol monobutyl ether, ethylene glycol monobutyl ether, propylene glycol monobutyl ether, and propylene glycol dibutyl ether.

  Since the thermoplastic resin used for the binding member of the present embodiment has low solubility in the non-aqueous solvent described above, the thermoplastic resin of the present embodiment is prevented from being modified during the heat bonding, and the adhesive strength is reduced. Decline can be prevented. Among the non-aqueous solvents described above, the solvent preferably used for the non-aqueous ink includes an aliphatic hydrocarbon solvent, an alicyclic hydrocarbon solvent, a fatty acid ester, and the like. Since the plastic resin has low solubility, the adhesive strength of the binding member can be sufficiently secured.

  In addition to the above components, the ink may contain various additives as necessary. Specifically, as an antifoaming agent, a surface tension reducing agent, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a nonionic surfactant, or a polymer-based, silicone-based, or fluorine-based surfactant. An agent can be contained in the ink.

  The printing method using non-aqueous ink is not particularly limited, but is preferably performed using an ink jet recording apparatus. The ink jet printer may be of any system such as a piezo system, an electrostatic system, or a thermal system. When an ink jet recording apparatus is used, it is preferable that the ink according to the present embodiment is ejected from the ink jet head based on a digital signal, and the ejected ink droplets are attached to the sheet.

  The viscosity of ink when non-aqueous ink is used as non-aqueous ink for inkjet recording varies depending on the nozzle diameter of the discharge head, the discharge environment, etc., but is generally 5 to 30 mPa · s at 23 ° C. It is preferably 5 to 15 mPa · s, and most preferably about 10 mPa · s. Here, the viscosity represents a value at 10 Pa when the shear stress is increased from 0 Pa at a rate of 0.1 Pa / s at 23 ° C.

  The sheet is not particularly limited, and the thickness of the ink absorbing layer is smaller than that of plain paper, high-quality plain paper, inkjet (IJ) paper, IJ matte paper, coated paper in which an ink absorbing solution is coated on the sheet, or coated paper. It can be used with fine coated paper, glossy paper (photo glossy paper), special paper, cloth, and the like.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these.

(Production Example 1)
As binding member, (prepared by drying the Dai-ichi Kogyo Seiyaku Co., Ltd. SUPERFLEX 840, a resin having a unit represented by the following formula (2)) sectional filamentous polyurethane resin as a rectangle 2 mm × 3 mm with Using.

  [In the formula (2), R ′ is an arbitrary divalent group. ]

  High quality paper (manufactured by Asia Base Paper Co., Ltd., WHITE PPC) was used as the sheet. The ten high-quality papers were stacked without being printed to form a 3 mm × 3 mm hole.

The thread-like polyurethane resin was placed through this hole, and heat-bonded to bind ten high-quality paper. The pressurizing conditions were 160 ° C., 0.5 kN / m ² , and 3 seconds.

(Production Example 2)
10 sheets of quality paper were bound in the same manner as in Production Example 1 except that 10 sheets of quality paper were stacked in a printed state.

  High-quality paper is printed using a line-type inkjet printer “ORPHIS X9050” (made by Riso Kagaku Co., Ltd.) and non-aqueous ink “RISO X Ink F Black” (made by Riso Kagaku Co., Ltd. A solid black image was formed on one side using petroleum hydrocarbon, higher alcohol, and fatty acid ester. The print settings were paper type: plain paper and print density: 0 (standard).

(Production Example 3)
As the binding member, a thread-like polyethylene resin having a rectangular cross section of 2 mm × 3 mm (produced by melting and molding a LDPE (low density polyethylene) film (Roden Poly, thickness 0.03 mm) manufactured by Okura Industry Co., Ltd.)) was used. Other than that, ten high-quality papers were bound in the same manner as in Production Example 1 above.

(Production Example 4)
10 sheets of quality paper were bound in the same manner as in Production Example 3 except that 10 sheets of quality paper were stacked in a printed state. The quality paper was printed in the same manner as in Production Example 2 above.

(Peel strength evaluation)
10 strips of high quality paper are bound into a strip of 25 mm × 100 mm so as to include the binding portion, and 100 mm / min. Using a tensile tester (manufactured by A & D, Tensilon RTC-1210A). T-peeling was performed at a speed of, and the peak intensity was measured. This peak intensity was evaluated as peel strength. The results are shown in Table 1.

  As shown in Table 1, in Example 1, it can be seen that the binding member has high resistance to non-aqueous ink, and the peel strength is less likely to be lowered by printing. On the other hand, in Comparative Example 1, since the resistance of the binding member to the non-aqueous ink is relatively low, it can be seen that the peel strength is reduced by printing.

DESCRIPTION OF SYMBOLS 1 Sheet bundle 2 Binding member 3 Hole part 4 Scissor 5 Heating member 10 Sheet tray 11 Punching member 12 Binding member accommodating part 13 Conveyance path 14 Cutting member 15 Heating member 16 Puncher box 100 Sheet binding apparatus 200 Conveyance path 300 Discharge stand 400 Bypass Path A Printer B Sheet post-processing device

Claims (3)

Forming a hole in the plurality of sheets so as to penetrate a sheet bundle composed of a plurality of sheets,
A binding member containing a polyurethane resin is disposed in the hole,
The binding member disposed in the hole is heated from one or both surfaces of the sheet bundle, and is heat-bonded on one or both surfaces of the sheet bundle, or the wall surface of the hole to bind the plurality of sheets. A manufacturing method of a sheet bundle including a process .   Forming a hole in the plurality of sheets so as to penetrate a sheet bundle composed of a plurality of sheets,
  A binding member containing a polyurethane resin is disposed in the hole,
  A method for manufacturing a sheet bundle, comprising a step of heat-bonding the binding members disposed in the hole portions and binding the plurality of sheets. The method for manufacturing a sheet bundle according to claim 1, wherein the binding member has a thread shape.

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