JP6213647B2 - Wrapping paper and method for manufacturing wrapping paper - Google Patents

Description

  The present invention relates to a wrapping paper for wrapping a small sheet bundle and a method for manufacturing the wrapping paper.

  O-size paper such as A row 3 size, A row 4 size, B row 4 size, B row 5 size, etc. used for electrophotographic copying machines and various printers is deposited in units of 200 to 1000 sheets depending on the application, This small-size paper bundle is wrapped with wrapping paper, and one-dimensional code (bar code), two-dimensional code, product name, serial number, size, number of sheets, product code are provided on any of the six sides of the package. The product information such as is displayed and shipped. As wrapping paper for wrapping small format paper bundles, kraft paper (unbleached, semi-bleached, bleached) and polyla kraft paper laminated with polyethylene on kraft paper are used, but the strength is relatively large and printing It is desirable to use kraft paper (unbleached, semi-bleached, bleached) that is excellent in suitability and economy.

Regarding the display of product information on the package body as described above, as a conventional method, a ream label on which a barcode (one-dimensional code) having product information such as a product name and a serial number is printed is prepared. There is a method of sticking to a desired surface of the package.
In such a product information display method, it is necessary to separately prepare a ream label on which the product is displayed, and to install a labeler to which the ream label is attached. Therefore, the time required for attaching the label to the wrapping paper requires time, and the productivity of the wrapping paper is lowered.
Furthermore, when a ream label is pasted (glued), when the wrapping paper is recovered and recycled into recycled pulp, if the glued ream label is mixed as a foreign substance, it is distributed as a lump. There is a problem that the used paper collection is hindered, such as adhesion and fouling at the production equipment (disaggregation equipment and papermaking equipment), and the cause of paper breakage and the quality of the recycled paper obtained at the papermaking stage.
In some cases, a lot number is assigned to the package. In this case, a method of printing the lot number with a variable stamp is generally used. This method requires the installation of stamps and maintenance thereof.

Thus, as a conventional wrapping paper, there is a paper that improves the recyclability of the wrapping paper by printing a barcode in an area for wrapping the side surface of the small-sized paper bundle (for example, see Patent Document 1).
In addition, in a package of small-sized paper bundles, since the printing surface of the packaging is not easily flattened, the printing quality is deteriorated. Therefore, a proposal has been made to improve the printing quality by flattening the printing surface. (For example, refer to Patent Document 2).

JP 2007-077615 A JP 2005-103879 A

Wrapping paper using kraft paper (unbleached, semi-bleached) is brownish-brown and yellowish and has low whiteness, so when printing a barcode on this wrapping paper, it is difficult for the scanner to discriminate the density of the barcode. There's a problem.
Further, even with the wrapping paper using bleached kraft paper, there is a problem that the printing quality is insufficient in the flattening process as described in Patent Document 2 described above.

  It is an object of the present invention to provide a wrapping paper excellent in printability and a method for manufacturing the wrapping paper, such as being able to solve the above-described problems and clearly display product information.

  In order to solve the above-mentioned problems, the present invention is a wrapping paper for wrapping a small-sized paper bundle, and has a base paper made of kraft paper, and an information area is formed on the outer surface of the base paper by monochrome printing. The product information is printed in the information area.

With this configuration, product information can be clearly displayed in an information area filled in a single color by printing in a single color such as white.
As the kraft paper, unbleached kraft paper, semi-bleached kraft paper or bleached kraft paper can be used.

  In the above wrapping paper, when a one-dimensional code (barcode symbol) or a two-dimensional code (matrix code symbol) is printed in the information area, the density of the one-dimensional code or the two-dimensional code is clearly displayed. Can do.

  In the above wrapping paper, when the base paper is unbleached kraft paper or semi-bleached kraft paper, the strength as the wrapping paper can be increased.

  In the above-described wrapping paper, when a moisture-proof layer is provided on one side of the base paper, it is possible to effectively suppress the dimensional change of the oval paper. The moisture-proof layer preferably contains a tabular phyllosilicate compound and a synthetic resin latex.

  In the wrapping paper described above, the information area is printed on the outer surface of the side area that wraps the side surface of the small sheet bundle in the base paper, and the inspection area extends along the edge of the base paper, When a mark serving as a reference for cutting the base paper is printed on the outer surface of the inspection area, it is preferable that the side area extends in a direction orthogonal to the inspection area.

  In this configuration, when the original sheet of the base paper is cut, the mark can be detected by the sensor, and the base paper can be cut out from the original sheet based on the positional relationship between the mark and the cutting blade. Note that symbols and patterns other than marks cannot be printed in a dark color in the inspection area to be inspected by the sensor. Therefore, when the inspection area is arranged in the side area, the space for displaying the information area in the side area becomes small. However, in the present invention, the side area extends in a direction perpendicular to the inspection area. An information area can be formed in a large area.

  The present invention also relates to a method of manufacturing a wrapping paper for wrapping a bundle of small-sized paper, wherein the wrapping paper original is traveled in the longitudinal direction, and printed on the outer surface of the original inspection region. Detecting a mark with a sensor, and cutting the original fabric with the cutting blade based on the positional relationship between the mark and the cutting blade, and cutting out the wrapping paper from the original fabric. . In addition, the inspection area extends in the traveling direction on the original fabric, and a plurality of side areas for wrapping the side surfaces of the small sheet bundle extend in a direction perpendicular to the inspection area on the original fabric. Yes. Furthermore, the information area is printed by monochromatic printing on the outer surface of each side area, and the product information is printed on each information area.

In this configuration, since the side region extends in a direction orthogonal to the inspection region, a large information region can be formed in the side region.
In addition, product information can be clearly displayed in an information area painted in a single color by printing in a single color such as white.

In the wrapping paper of the present invention, product information can be clearly displayed in an information area painted in a single color by printing in a single color such as white. In particular, when the product information is a one-dimensional code or a two-dimensional code, the density of the one-dimensional code or the two-dimensional code can be clearly displayed, so that the scanner can reliably read the one-dimensional code or the two-dimensional code. be able to.
In the wrapping paper manufacturing method of the present invention, the space of the side surface region for wrapping the side surface of the small sheet bundle can be used effectively, and the information region can be formed large.

It is the top view which showed the wrapping paper of this embodiment. It is the perspective view which showed the original fabric of the wrapping paper of this embodiment. (A) is a perspective view of a state in which a small sheet bundle is placed on the wrapping paper of this embodiment, and (b) is a perspective view of the packaging body. It is the schematic block diagram which showed the traveling apparatus and cutting blade of this embodiment.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front, rear, left, and right directions are set for convenience in order to easily understand the configuration of the wrapping paper.

  As shown in FIG. 3A, the wrapping paper 1 of the present embodiment is for wrapping a small sheet bundle 2. 3 (b) by placing the oval paper bundle 2 on the center of the inner surface 1b of the wrapping paper 1, bending the wrapping paper 1 along each surface of the oval paper bundle 2, and bonding the overlapped portions. As shown, the package 3 can be formed.

As shown in FIG. 1, the wrapping paper 1 has a base paper 10 made of kraft paper. The base paper 10 is formed in a rectangular shape in plan view. The kraft paper can be selected from unbleached kraft paper, semi-bleached kraft paper, or bleached kraft paper.
As the raw material of the base paper 10, a material obtained by appropriately mixing kraft pulp with mechanical pulp, waste paper pulp, synthetic pulp, or the like can be used. In addition, inorganic fillers such as calcium carbonate, clay and talc, plastic fillers, and the like may be added to these raw materials. Further, additives such as dyes, pigments, paper strength enhancers, yield improvers, sizing agents, pH adjusters and the like used in ordinary paper making methods may be added internally or externally.

  Further, the base paper 10 made of kraft paper (unbleached, semi-bleached, bleached) is desirably improved in printing effect by internally adding or coating a material that promotes fixability of printing ink on the outer surface 1a. . Specifically, inorganic fillers such as calcium carbonate, clay and talc, methods of applying pigments and plastic fillers, etc. to the surface, fixing accelerators, binders such as starch and PVA, surface sizing agents, cationic chemicals Additives such as dyes, paper strength enhancers, yield improvers, sizing agents, pH adjusters, and electrical resistance adjusters may be internally or externally added.

The basis weight (JIS P8124) of kraft paper (unbleached, semi-bleached, and bleached) is preferably 40 to 150 g / m ^{2, and} more preferably in the range of 50 to 80 g / m ² as a wrapping paper 1 for a small format paper bundle. . If it is thinner than this range, it will be easily broken during the packaging process, distribution and handling, and if it is thicker than the above range, it will be bulky and difficult to handle. Get higher.
The wrapping paper preferably has a tensile strength (JIS P8113) of 2.5 kN / m or more, a tear strength (JIS P8116) of 600 mN or more, and a burst strength (JIS P8112) of 200 kPa or more. It is a requirement item. It is desirable that the wrapping paper has a Steecht sizing degree (JIS P8122) of 10 to 40 seconds and a moisture permeability of 20 seconds or more according to a measurement method defined in the JIS Z2080 cup method.

  It is desirable to formulate two or more kinds of cationic chemicals in the paper layer in order to give flexographic printing suitability in printing of the information area 20, bar code 21, character information 22 and mark 30 described later. For example, two types of chemicals can be mixed and applied, or one type of chemical is internally added or size press applied to make a base paper, and then one or more types of cationic chemicals are applied in post-processing. There is also a way to do it. In particular, in the moisture-proof process, by applying a chemical to the opposite surface of the moisture-proof processed surface, it is possible to improve the printability with a half amount of chemical.

  By setting the smoothness of the base paper before moisture-proofing to 12 seconds or less on both the inner and outer sides, it is possible to improve the moisture-proofing suitability and to impart more appropriate load collapse resistance and product slip resistance as wrapping paper. it can. Even if the smoothness of one side of the base paper before moisture-proofing exceeds 12 seconds, good flexographic printability can be obtained, but load collapse and slipping of the packaged small-format paper may occur. Is concerned.

  It is desirable to apply an anti-slip agent to the surface of the base paper in order to give it an appropriate load collapse resistance and product slip resistance as a wrapping paper, but the anti-slip agent is not applied to the entire surface of the base paper, but only to a part. The amount of anti-slip agent used can be reduced by prescribing. In general, the application of the anti-slip agent is often simultaneously performed online in the paper making process or the moisture-proofing process, but in the present embodiment, it is desirable to perform the processing in the printing process, the bag making process, and the slitter processing process.

  When unbleached kraft paper in which pulp is not bleached is used as the base paper 10 of this embodiment, the color of the base paper 10 is brown or yellow, and the whiteness of the base paper 10 is reduced.

  A moisture-proof layer is coated or laminated on the inner surface 1b of the base paper 10 (see FIG. 3A). Thus, by providing the base paper 10 with a moisture-proof layer, the quality of the small-sized paper due to moisture is prevented from being deteriorated.

A well-known structure can be used as the moisture-proof layer. That is, a method of forming a synthetic resin film such as polyethylene or polypropylene as a laminate layer by a wet method or a dry method, a method of forming a coating film containing a wax as a component, or a coating film containing inorganic compound particles having a high aspect ratio Among them, a method using inorganic compound particles having a high aspect ratio can be preferably used, and in particular, a moisture-proof formed from a paint containing tabular phyllosilicate compound particles. A layer can be suitably used.
The plate-like phyllosilicate compound (layered silicate compound having a layered structure) used in the present embodiment is a plate or flake and has a clear cleavage, kaolinite (kaolin mineral), mica group, There are brittle mica, pyrophyllite, talc, smectite, vermiculite, chlorite, septite chlorite, serpentine, stilpnolane, and montmorillonite. Of these, mica and talc are preferable. The mica family includes muscovite (mascobite), sericite (sericite), phlogopite (flocopite), biotite (biotite), fluorophlogopite (artificial mica), red mica, soda mica, vanadine mica, illite, Chin mica, paragonite, brittle mica and the like.
Of these phyllosilicate compounds, muscovite and sericite are preferable from the viewpoint of particle size, aspect ratio (numerical diameter divided by thickness), and the like. In the present embodiment, any pigment having flatness (flat shape) may be used, but a more preferable average particle size range is 3 μm to 100 μm, and a more preferable average particle size range is 5 μm to 50 μm. When the average particle size is less than 5 μm, the orientation of the tabular pigment in the coating layer is difficult to be parallel to the support, and when it exceeds 50 μm, part of the tabular pigment protrudes from the coating layer. As the thickness of the tabular pigment becomes about several μm, the number of layers in the coated layer of the oriented tabular pigment decreases, so the effect of improving the moisture-proof performance decreases. A preferred aspect ratio is 5 or more, and particularly preferred is a flat pigment having an aspect ratio of 10 or more. Those having an aspect ratio of less than 5 are inferior in moisture proof performance because they cannot be oriented parallel to the coated surface. The higher the aspect ratio, the higher the number of layers in the coating layer of the flat pigment, and the higher the moisture resistance.
The plate-like phyllosilicate compound is moisture-proof and can enhance the moisture-proof effect when used in combination with a synthetic resin that forms a film. The synthetic resin forming the film is preferably used as an aqueous latex.

Examples of the synthetic resin latex of this embodiment include styrene-butadiene latex (SBR), acrylic-styrene latex, methacrylate-butadiene latex, acrylonitrile-butadiene latex, and the like. Styrene-butadiene latex is preferred because the coating layer is less likely to crack due to. Styrene-butadiene latex is modified with (meth) acrylic acid, (meth) acrylic acid ester, (meth) acrylonitrile, (meth) acrylic acid glycidyl, (meth) acrylic acid amide, (meth) acrylic glycidyl ether, etc. -Butadiene latex (modified SBR) may be used.
The blending amount of the synthetic resin and the flat pigment in the moisture-proof layer is preferably 99/1 to 30/70 in terms of mass, more preferably 97/3 to 35/65, and particularly preferably 95/5 to 40/60. . When the amount of the tabular pigment is less than 1% by mass, the effect of improving moisture resistance and the effect of improving disaggregation are reduced. If the blending amount of the flat pigment exceeds 70% by mass, the resin that fills the space between the flat pigments is insufficient, resulting in an increase in voids and pinholes, resulting in deterioration of moisture resistance.

Further, in addition to the flat phyllosilicate compound and the synthetic resin latex, a moisture proofing agent may be added as a coating component. That is, urea or melamine formaldehyde resins, aldehydes, epoxy compounds, cross-linking reactive polyvalent metal compounds, coupling agents, amino compounds, polyamide compounds, polyamide polyurea compounds, halohydrins or formaldehyde compounds thereof are used alone or in combination. be able to.
The above-mentioned materials are mixed to obtain a moisture-proof paint (water-based). At this time, if necessary, a dispersant such as polycarboxylic acid, an antifoaming agent, a surfactant, and a color conditioner may be added. it can. This paint is applied to a paper support by a conventional method to form a moisture-proof layer. The coating equipment is not particularly limited, but a coating system such as a blade coater, a bar coater, or an air knife coater that scrapes the coated surface is preferable because it tends to promote the orientation of the flat pigment. If the coating weight of the moistureproof layer was coated on one surface (coating amount of the case where the coating on both sides to fit both sides), 15 to 40 g / m ² as solid content, is preferably 20 to 35 g / m ² .

  The base paper 10 includes a lower surface region 11 for wrapping the lower surface of the oval paper bundle 2 (see FIG. 3A), two first side surface regions 12 for wrapping both sides in the short direction of the oval paper bundle 2, Two second side surface regions 13 for wrapping both sides in the longitudinal direction of the oval paper bundle 2, two upper surface regions 14 for wrapping the upper surface of the oval paper bundle 2, and an inspection provided at the right edge of the base paper 10 An area 15 is partitioned.

The inspection area 15 is a band-like area extending over the entire length of the right edge of the base paper 10.
As shown in FIG. 1, a square mark 30 is printed in a dark color such as black or dark blue at the front end of the inspection area 15, that is, the right front corner of the base paper 10.
The inspection area 15 is an area to be inspected by a sensor 6c described later, and the mark 30 is detected by the sensor 6c.
Since the symbols and patterns other than the mark 30 are not printed in the inspection area 15 of the present embodiment, and the area is a plain area, the sensor 6c can reliably detect the mark 30.

The first side surface region 12 is a belt-like region that extends to the front and rear edges of the base paper 10 (the edge on the long side of the base paper 10), and extends in a direction orthogonal to the inspection region 15. Yes.
As shown in FIG. 3B, the first side surface region 12 is folded into a carton hold type or an under hold type, and wraps the side surface in the short direction of the small sheet bundle 2 (see FIG. 3A). It is a part.

As shown in FIG. 1, an information area 20 is printed by white solid printing on the outer surface 1 a of the first side area 12 at the center in the left-right direction (longitudinal direction) of the base paper 10. The information area 20 is a rectangular area wide in the left-right direction of the base paper 10 and is painted white.
As shown in FIG. 3B, the information area 20 is displayed on the outer surface of the drooping lid that overlaps the outermost side when the first side surface area 12 is folded by the carton hold type or the under hold type.
In the information area 20, after white solid printing, barcode symbol 21 (hereinafter simply referred to as “barcode”) and product character information 22 as product information are displayed in dark colors such as black and dark blue. It is printed.

  As a printing method of the information area 20, the barcode 21, the character information 22, and the mark 30, various known printing methods can be used. For example, various printing methods such as offset printing, letterpress printing, stencil printing, flexographic printing, electrophotographic printing, ink jet printing, thermal transfer printing, and ultraviolet curable printing can be used as printing methods.

  In addition, ink containing a white pigment is used for solid white printing of the information area 20. As the component, lead white, titanium oxide, calcium carbonate and the like are used. Calcium carbonate can be synthesized by reacting calcium hydroxide with carbon dioxide, and can also be obtained by pulverizing and classifying limestone, clams, oysters, and scallop shells. Organic pigments can also be used.

As shown in FIG. 2, the wrapping paper 1 described above is manufactured by cutting an original fabric 100 wound in a roll shape at a predetermined interval by a cutting device 5 described later. On the original fabric 100, the base paper 10 is continuously printed in the longitudinal direction.
An inspection region 15 of each base paper 10 is continuously formed on the edge of the original fabric 100 in the longitudinal direction, and marks 30 are printed at regular intervals.
Further, the first side region 12 of the front and rear base paper 10 is continuously provided on the original fabric 100 with the cutting position 101 interposed therebetween.

Next, the cutting device 5 for cutting out the wrapping paper 1 from the original fabric 100 will be described.
As shown in FIG. 4, the cutting device 5 includes a traveling device 6 that travels the original fabric 100 drawn out from the roll-shaped portion in the longitudinal direction, and a cutting blade 7 that cuts the original fabric 100.

  The traveling device 6 includes a driving roller (not shown) that feeds the original fabric 100 in the longitudinal direction, a guide roller 6 a that guides the original fabric 100, a dancer roller 6 b that applies longitudinal tension to the original fabric 100, And a sensor 6c for inspecting the anti-100 inspection region 15 (see FIG. 2).

The sensor 6c is a photodetector that detects fluctuations in the amount of reflected light, and inspects the inspection region 15 shown in FIG. 2 to detect the dark mark 30.
The sensor 6c is disposed between the two guide rollers 6a. By reducing the distance between the two guide rollers 6a, the original fabric 100 travels stably between the two guide rollers 6a. Further, the sensor 6c is disposed in the vicinity of the guide roller 6a on the cutting blade 7 side. Thereby, since the original fabric 100 which passes the sensor 6c can be stabilized, the mark 30 can be reliably detected by the sensor 6c.

The cutting device 5 shown in FIG. 4 cuts the raw fabric 100 based on the positional relationship between the mark 30 (see FIG. 2) and the cutting blade 7.
In the cutting device 5, the travel amount or time of the original fabric 100 from when the sensor 6c detects the mark 30 (see FIG. 2) until the cutting position 101 (see FIG. 2) reaches the cutting blade 7 is set in advance. Has been.
In the cutting device 5, each time the sensor 6 c detects the mark 30 (see FIG. 2), the cutting blade 7 is operated at a predetermined interval to cut the original fabric 100 at the cutting position 101 (see FIG. 2). Thus, the base paper 10 (wrapping paper 1) can be cut out from the raw fabric 100.

  In the wrapping paper 1 as described above, as shown in FIG. 1, the barcode 21 is printed on the information area 20 painted white by solid white printing, and the density of the barcode 21 is clearly expressed. Therefore, the barcode 21 can be reliably read by the scanner. In addition to the bar code 21, the information area 20 can clearly represent the character information 22 of the product.

  Further, in the method for manufacturing the wrapping paper 1, the original fabric 100 (see FIG. 2) can be reliably cut at the cutting position 101 based on the mark 30 in the inspection region 15. Therefore, the information area 20 can be displayed at the same position on each wrapping paper 1.

Further, since the side surface region 12 extends in a direction orthogonal to the inspection region 15, the information region 20 can be formed large in the first side surface region 12.
Since symbols and patterns other than the mark 30 cannot be printed in a dark color in the inspection area 12, if the inspection area 15 is arranged in the first side area 12, The information area 20 becomes smaller. However, by extending the first side region 12 in a direction perpendicular to the inspection region 15, the distance between the front and rear edges of the information region 20 and the front and rear edges of the first side region 12 can be set to the left and right direction of the detection region 15. The information region 20 can be formed by effectively using the space in the first side surface region 12.

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
In the present embodiment, as shown in FIG. 1, the information area 20 is painted white by white solid printing, but the color of the information area 20 is not limited, and the information area 20 is monochromatic by monochromatic printing. It only has to be painted.
Moreover, the site | part to which the information area | region 20 is printed is not limited, It can set so that the information area | region 20 may be displayed on the desired surface of the package 3 (refer FIG.3 (b)).

  In the present embodiment, no symbols or patterns other than the mark 30 are printed on the inspection area 15 of the base paper 10. However, if the mark 30 can be reliably read by the sensor 6c, the inspection area 15 is thin. Symbols and patterns may be printed with colors.

  In the present embodiment, the barcode 21 which is a one-dimensional code is printed as product information in the information area 20, but a two-dimensional code (matrix code symbol) is printed as product information in the information area 20. Good. Further, the product name, serial number, size, number of sheets, product code, etc. may be printed in the information area 20 as product information.

DESCRIPTION OF SYMBOLS 1 Wrapping paper 2 Oval paper bundle 3 Package 5 Cutting device 6 Traveling device 6a Guide roller 6b Dancer roller 6c Sensor 7 Cutting blade 10 Base paper 11 Lower surface region 12 First side region 13 Second side region 14 Upper surface region 15 Inspection region 20 Information area 21 Bar code (one-dimensional code)
22 Character information 30 Mark 100 Original fabric 101 Cutting position

Claims (7)

A package comprising a wrapper for wrapping an oval sheet bundle and the oval sheet bundle,
The wrapping paper has a base paper made of kraft paper,
An information area is printed by monochromatic printing on the outer surface of the base paper,
Product information is printed in the information area ,
The information area is printed on the outer surface of the side area for wrapping the side of the bundle of small paper on the base paper,
An inspection area extends along the edge of the base paper,
On the outer surface of the inspection area, a mark serving as a reference when cutting the base paper is printed,
The package body, wherein the side surface region extends in a direction orthogonal to the inspection region . The package according to claim 1, wherein the inspection area is a plain area except for the mark . Wherein the information in the area, the packaging body according to claim 1 or claim 2, characterized in that one-dimensional code or two-dimensional code is printed. The base paper, packaging according to claims 1, characterized in that the unbleached kraft paper or semi-bleached kraft paper to any one of claims 3. Packaging according to any one of claims 1 to 4, wherein a moisture-proof layer is provided on one surface of the base paper. The moisture barrier package of claim 5, characterized by containing the flat plate-like phyllosilicate compound and synthetic resin latex. A method for manufacturing a package ,
A step of causing the wrapping paper original fabric according to any one of claims 1 to 6 to travel in the longitudinal direction;
Detecting the mark printed on the outer surface of the original fabric inspection area by a sensor;
Based on the positional relationship between the mark and the cutting blade, the raw material is cut by the cutting blade,
Cutting out the wrapping paper from the original fabric;
Bending the wrapping paper along each surface of the oval paper bundle after placing the oval paper bundle on the center of the inner surface of the cut wrapping paper, and bonding the overlapped portions;
With
In the original fabric, the inspection area extends in the traveling direction,
The manufacturing method of the package body , wherein a plurality of the side regions extend in a direction orthogonal to the inspection region on the original fabric.

Images