WO2021172244A1

WO2021172244A1 - Shrink label raw material

Info

Publication number: WO2021172244A1
Application number: PCT/JP2021/006527
Authority: WO
Inventors: 剛輔松永; 原田　雅史; 洋松岡; 隼也西田
Original assignee: 株式会社フジシールインターナショナル
Priority date: 2020-02-26
Filing date: 2021-02-22
Publication date: 2021-09-02
Also published as: JPWO2021172244A1

Abstract

Provided is a shrink label raw material in which solid printing part is finely expressed by letterpress printing. The shrink label raw material comprises: a long strip-shaped thermal shrinkage film 1; a design row including a plurality of design printing parts 21 and 22 repeatedly printed in a longitudinal direction of the thermal shrinkage film 1 and transparent parts 41 and 42 arranged between the respective design printing parts 21 and 22 and extending in a widthwise direction, the design row having design rows X1 and X2 arranged in two rows or more in the widthwise direction of the thermal shrinkage film 1. In the first design row X1 and the second design row X2 adjacent to each other in the widthwise direction, the transparent parts 41 of the first design row X1 and the transparent pars 42 of the second design row X2 are discontinuous in the widthwise direction.

Description

Shrink label original fabric

The present invention relates to a shrink label original fabric in which a design printing portion is repeatedly represented in the longitudinal direction on a long strip-shaped heat-shrinkable film.

A shrink label in which a heat-shrinkable film is formed into a tubular shape is known. Such a shrink label usually has a long strip-shaped shrink label original fabric having a long strip-shaped heat-shrinkable film and a plurality of design printing portions repeatedly printed in the longitudinal direction of the heat-shrinkable film. Obtained by cutting. The design printing portion is formed by printing ink on a heat-shrinkable film by various printing methods.

The printing method can be roughly divided into a letterpress printing method and an intaglio printing method. The letterpress printing method is relatively inexpensive in terms of cost, and is excellent in printability for heat-shrinkable films of various materials and thicknesses. Examples of the letterpress printing method include printing methods such as a flexographic printing method and a letterpress rotation printing method. In particular, when a shrink label is formed by the letterpress printing method, the flexographic printing method is often used.

The flexographic printing method is a method of printing flexographic ink using a cylindrical plate having a cylindrical plate cylinder and a sheet-shaped printing plate wound around the plate cylinder. The printing plate has a letterpress. By rotating the cylindrical plate having the printing plate and bringing the heat-shrinkable film into contact with the surface of the plate, the ink is transferred from the letterpress to the heat-shrinkable film to form a design printing portion.

In letterpress printing methods such as flexographic printing, contact with the heat-shrinkable film on the surface of the cylindrical plate (the letterpress comes into contact with the heat-shrinkable film) and heat on the surface of the cylindrical plate as the cylindrical plate rotates. Non-contact with the shrinkable film (leaving away from the heat-shrinkable film in the recess without the letterpress) is repeated alternately. Therefore, the cylindrical plate vibrates to cause so-called bouncing, which may cause defective ink transfer. Printing is blurred at areas where ink transfer is poor, so improvement is required.

Patent Document 1 has an image portion and a non-image portion, and a low layer in which a region from the tip end side of the image portion in the printing direction to 0.5 mm to 5 mm is lower than the height of the image portion other than the region. It is disclosed that a flexographic printing plate is used, which is a modified region, and the low-layer region is gradually lowered toward a non-image portion in the printing direction. Patent Document 1 describes that by using the flexographic printing plate, bouncing can be suppressed and an even image can be printed.

WO2016 / 136357

From the viewpoint of the variety of technologies, when expressing a design by letterpress printing, a shrink label original fabric in which the design printing part is beautifully represented by a means different from Patent Document 1 is desired.

An object of the present invention is to provide a shrink label original fabric in which the design printing portion is neatly represented by letterpress printing.

The original shrink label of the present invention was arranged between a long strip-shaped heat-shrinkable film, a plurality of design printing parts repeatedly printed in the longitudinal direction of the heat-shrinkable film, and each of the design printing parts. A design row including a transparent portion extending in the lateral direction, the design row having two or more rows arranged in the lateral direction of the heat-shrinkable film, and adjacent to each other in the lateral direction. In the 1st design row and the 2nd design row, the transparent portion of the 1st design row and the transparent portion of the 2nd design row are discontinuous in the lateral direction.

The preferable shrink label raw fabric of the present invention is a shrink label raw fabric used by joining those cut along the lateral direction with a joining member, and the joining member is the first design row. It is arranged at a position that does not overlap with either the transparent portion or the transparent portion of the second design row.

According to the present invention, since ink loss can be suppressed when the design printing portion is letterpress printed on the cylindrical plate, it is possible to provide a shrink label original fabric in which the design printing portion is beautifully represented by letterpress printing.

FIG. 1 is a plan view of the shrink label original fabric as viewed from the front surface side. FIG. 2 is a plan view of the original shrink label fabric as viewed from the back surface side. FIG. 3 is a partially enlarged back view of FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a reference side view of a printing machine used in the manufacturing process of shrink label raw fabric. FIG. 7A is a plan view of the first cylindrical plate. FIG. 7B is a perspective view of the first cylindrical plate. FIG. 8 is a plan view of the first printing plate. FIG. 9 is a perspective view of a roll body in which the original shrink label roll is wound into a roll shape. FIG. 10 is a plan view of a long sheet obtained from the original shrink label fabric as viewed from the back surface side. FIG. 11 is a reference perspective view showing a process of forming a tubular label from a long sheet. FIG. 12A is a front view showing a process of attaching a wrapping label obtained from a long sheet to an article. FIG. 12B is a front view showing a process of attaching a wrapping label obtained from a long sheet to an article. FIG. 13 is a plan view of the original shrink label having a printing defective area as viewed from the back surface side. FIG. 14 is a plan view showing a process of removing a printing defective area. FIG. 15A is a plan view showing a process of joining shrink label raw fabrics. FIG. 15B is a plan view showing a process of joining shrink label raw fabrics.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification, the plan view shape refers to a shape when the heat-shrinkable film is viewed in the normal direction from the front surface side or the back surface side of the heat-shrinkable film. In addition, "first", "second", etc. may be added to the beginning of the term, but this first, etc. is added only to distinguish the terms, and the order, superiority, etc. It has no special meaning. The numerical range represented by "lower limit value X to upper limit value Y" means a lower limit value X or more and an upper limit value Y or less. When a plurality of the numerical values are described separately, it is possible to select an arbitrary lower limit value and an arbitrary upper limit value and set "arbitrary lower limit value to arbitrary upper limit value". In addition, the dimensions, thickness, scale ratio, etc. of each configuration in each figure are different from the actual ones.

<Outline of shrink label original fabric>
FIG. 1 is a view of the shrink label original fabric A as viewed from the front surface side. FIG. 2 is a view of the shrink label original fabric A viewed from the back surface side. FIG. 3 is an enlarged plan view of a part of FIG. 2. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. FIG. 5 is a cross-sectional view taken along the line VV of FIG.

In FIG. 1, the shrink label original fabric A of the present disclosure has a long strip shape in a plan view. In the present specification, the long strip shape refers to a substantially rectangular shape in a plan view in which the length in the longitudinal direction is sufficiently longer than that in the lateral direction. The lateral direction is a direction orthogonal to the longitudinal direction. The length in the longitudinal direction of the long strip is, for example, 5 m or more, preferably 10 m or more. The shrink label original fabric A has a long strip-shaped heat-shrinkable film 1 and a plurality of design printing portions formed on the heat-shrinkable film 1. Here, in the present specification, the design printing section comprises an ink solidifying section in which ink is printed on the heat-shrinkable film 1 and the ink is solidified.

In the present embodiment, the design printing unit includes a design printing unit 21 that is repeatedly printed in the longitudinal direction, a design printing unit 22 that is repeatedly printed in the longitudinal direction, and a design printing unit 23 that is repeatedly printed in the longitudinal direction. And a design printing unit 24 that is repeatedly printed in the longitudinal direction. The

design printing units

21, 22, 23, 24 are adjacent to each other in the lateral direction as shown in FIG. Hereinafter, when all of the design printing unit 21, the design printing unit 22, the design printing unit 23, and the design printing unit 24 are intended, they may be referred to as the design printing units 21 to 24. The same applies to the following description.

The plurality of design printing units 21 to 24 are repeatedly printed in the longitudinal direction of the heat-shrinkable film 1, and therefore, the plurality of design printing units 21 to 24 are arranged in the longitudinal direction, respectively. A transparent portion 41 extending in the lateral direction is included between the design printing portions 21 adjacent to each other in the longitudinal direction. Similarly, a transparent portion 42 extending in the lateral direction is provided between the design printing portions 22 adjacent to each other in the longitudinal direction, and a transparent portion 43 extending in the lateral direction is provided between the design printing portions 23 adjacent to each other in the longitudinal direction. A transparent portion 44 extending in the lateral direction is included between the design printing portions 24 adjacent to each other in the longitudinal direction.

The row X1 (design row X1) composed of the design printing portion and the transparent portion arranged in the longitudinal direction may be arranged in two or more rows in the lateral direction of the heat shrinkable film 1. In the present embodiment, the design printing units 21 to 24 are adjacent to each other in the longitudinal direction and the lateral direction. In two design rows X1 and X2 (first design row X1 and second design row X2) adjacent to each other in the lateral direction, the transparent portion 41 of the first design row X1 and the transparent portion 42 of the second design row X2 are short. Discontinuous in the hand direction.

<Heat shrinkable film>
The heat-shrinkable film 1 is not particularly limited as long as it has heat-shrinkability, flexibility, and appropriate strength and rigidity. For example, a synthetic resin film, a foamed resin film, a non-woven fabric, and the like. Examples thereof include a laminated film in which two or more layers are laminated. Further, a film in which a gas and / or optical barrier layer such as a metal vapor deposition film is laminated on a synthetic resin film or a laminated film may be used as the heat shrinkable film 1. Heat shrinkability refers to the property of shrinking when heated to a predetermined temperature (for example, 70 ° C to 100 ° C). The material of the synthetic resin film and the like is not particularly limited, and examples thereof include polyethylene, polypropylene, cyclic olefins, polyolefin-based materials such as copolymer polymers containing polyethylene, polyester-based materials such as polyethylene terephthalate and polylactic acid, polyamide-based materials, and polystyrene-based materials. Can be mentioned.

Further, the heat-shrinkable film 1 may have self-stretchability, provided that it has heat-shrinkability, or may have substantially no self-stretchability. Self-stretching refers to the property of stretching by applying a tensile force and then restoring to almost the original state by releasing the tensile force. The heat-shrinkable film 1 may be heat-shrinkable in the lateral direction, heat-shrinkable in the longitudinal direction, or heat-shrinkable in the lateral direction and the longitudinal direction. Further, the heat-shrinkable film 1 may be one that is mainly heat-shrinkable in the lateral direction, one that is mainly heat-shrinkable in the longitudinal direction, or one that is equivalent in the lateral direction and the longitudinal direction. ..

In the illustrated example, the heat-shrinkable film 1 that mainly heat-shrinks in the lateral direction is used. The heat shrinkage rate of the heat shrinkable film 1 in the main heat shrinkage direction (for example, the short side direction) is not particularly limited, but is preferable because it can be satisfactorily attached to an adherend having a relatively large diameter difference. Is 20% or more, more preferably 30% or more, still more preferably 40% or more. The heat-shrinkable film 1 may change heat in a direction orthogonal to the main heat-shrinking direction (for example, in the longitudinal direction), and the heat-shrinkability in that direction is, for example, -3 to 15%, preferably -3 to 15%. It is 1 to 10%. The minus of the heat shrinkage rate means heat elongation.

However, in the present specification, the heat shrinkage is the length (original length) of the heat shrinkable film 1 before heating (stored for 24 hours under standard conditions) and the heat shrinkage is taken out by immersing it in warm water at 90 ° C. for 10 seconds. The length of the heat-shrinkable film 1 (the length after immersion) is measured under standard conditions, and is obtained by substituting it into the following equation. The length of each heat-shrinkable film 1 is measured under standard conditions. Standard conditions are 23 ° C, 1 atm, and 50% RH.
Heat shrinkage rate (%) = [{(original length in the longitudinal direction (or the lateral direction))-(length after immersion in the longitudinal direction (or the lateral direction))} / (longitudinal direction (or the lateral direction) Direction) Original length)] x 100.

The thickness of the heat-shrinkable film 1 is not particularly limited, and is, for example, 8 μm to 200 μm, preferably 10 μm to 120 μm. Further, the heat-shrinkable film 1 is preferably a transparent (colored transparent or colorless transparent) film, and more preferably a colorless and transparent film is used. Among the above examples, examples of the transparent heat-shrinkable film 1 include a synthetic resin film, a laminated film of a synthetic resin film and another transparent film, and the like.

Here, transparent (colored transparent or colorless transparent) is a white paper printed with an arbitrary number (12 points in size) on the back side of the object at a distance of 1 cm from the back side. It refers to a state in which the object is arranged and the number can be identified from the surface side through the object. As an index of transparency (colorless transparency or colored transparency), for example, the total light transmittance is 70% or more, preferably 80% or more, and more preferably 90% or more. However, the total light transmittance refers to a value measured by a measurement method based on JIS K 7361 (test method for total light transmittance of plastic-transparent material).

<Design printing department>
The design printing units 21 to 24 use a set of arbitrary images (designs) as one design pattern, and the design pattern is repeatedly letterpress-printed in the longitudinal direction of the heat-shrinkable film 1. Assuming that each of the plurality of design printing units 21 to 24 arranged in the longitudinal direction is a "row", the design printing units 21 to 24 are provided in two or more rows (multiple rows) in the lateral direction of the heat shrinkable film 1. ing.

The design rows may be formed in two or more rows in the lateral direction of the heat-shrinkable film 1, preferably in three rows or more, and more preferably in four rows or more. The upper limit of the number of rows in the design row is not particularly limited, and is determined by the relationship between the length in the short direction of the heat-shrinkable film 1 and the length in the short direction of the design printing portion. In the illustrated example, for convenience, the shrink label original fabric A provided with four rows of design rows X1 to X4 in the lateral direction is represented.

Hereinafter, when each design column is distinguished in terms of terms, it is referred to as a first design column X1, a second design column X2, and the like. However, the first design row X1 and the second design row X2 are two design rows adjacent to each other in the lateral direction. As shown in the illustrated example, for convenience, the four rows of design rows X1 to X4 are referred to as the first design row X1, the second design row X2, the third design row X3, and the fourth design row X4 in order from the side. It is not limited to this order.

As shown in FIG. 1, the design printing units 21 to 24 are letterpress-printed on the front surface and / or the back surface of the heat-shrinkable film 1 so that the image (design) can be visually recognized from the front side of the heat-shrinkable film 1. There is. The design printing units 21 to 24 are provided on at least one of the front surface and the back surface of the heat shrinkable film 1. From the viewpoint of preventing scratches, the design printing units 21 to 24 are letterpress-printed on the back surface of the heat-shrinkable film 1.

The design printing units 21 to 24 have a display printing unit 5 formed by letterpress printing and representing an image (design). Preferably, the design printing units 21 to 24 include a display printing unit 5 formed by letterpress printing and representing an image (design), and a patternless solid color solid printing unit 31 to 34 formed by letterpress printing. ..

The display printing unit 5 is formed by letterpress printing one color ink or two or more color inks on the heat shrinkable film 1. Further, the display printing unit 5 may be formed by printing one layer (1 degree), may be formed by overprinting two or more layers (two times or more), or may be formed by overprinting two or more layers. It may be formed by printing in a state where (twice or more) are not overlapped and they are separated from each other.

Examples of the image represented by the display / printing unit 5 include characters, symbols, and patterns. From the viewpoint of visually transmitted contents (information), the display / printing unit 5 represents legal display or non-legal display using images such as characters and symbols. Legal labeling refers to what should be represented by law, trade association agreements or customs. The statutory label is determined according to the product to which the shrink label is applied, and examples thereof include a product name, an ingredient, a place of origin, a content, an expiration date, a date of manufacture, and a manufacturer (seller). Non-statutory labeling usually refers to what is arbitrarily represented to promote a product. Non-statutory indications generally include trademarks (product names), characters, product images, product descriptions, catchphrases, and the like. In the illustrated example, the display printing unit 5 includes a display printing unit 5 representing characters and a display printing unit 5 representing a pattern. However, the present invention is not limited to these two, and may be only one or three or more.

The solid printing units 31 to 34 represent a solid image of one color, and preferably a solid image of one color without a pattern. The solid shape means that the solidified ink portion extends in the plane direction to form one continuous layer. However, since the solid image formed by the printing method is composed of an aggregate of inks that are adhered and solidified in a dot shape, the ink solidified portion extends in the plane direction when viewed macroscopically. Although they form one continuous layer, it should be noted that there may be innumerable minute gaps in the plane when viewed microscopically. When viewed microscopically in this way, even if there are minute gaps, if they form one continuous layer macroscopically, they are included in the solid category.

The colors of the solid printing units 31 to 34 are not particularly limited, and are one color selected from arbitrary colors such as white, silver, and black. Preferably, the solid printing units 31 to 34 are white. The solid printing unit 31 may express a pattern with shading, or may have no pattern. For example, the plain white solid printing units 31 to 34 can be formed by letterpress printing white ink on the heat-shrinkable film 1. In particular, the solid printing units 31 to 34 are displayed so as to cover the back surface of the display printing unit 5 and the back surface of the heat shrinkable film 1 (the back surface of the heat shrinkable film 1 in the range where the display printing unit 5 is not formed). It is formed so as to extend to the back surface of the printing portion 5 and the back surface of the heat-shrinkable film 1. Such non-patterned solid color printing units 31 to 34 are also called background printing or the like to make the image of the display printing unit 5 stand out, and are one element of the design represented by the design printing units 21 to 24. It becomes.

In the illustrated example, the design printing units 21 to 24 cover the display printing unit 5 with letterpress printing on the back surface of the heat shrinkable film 1, and the display printing unit 5 and the heat shrinkable film 1 so as to cover the display printing unit 5. It has solid printing portions 31 to 34 printed in letterpress on the back surface. The size (area) of the solid printing units 31 to 34 is usually larger than that of the display printing unit 5. Further, it can be said that the size (area) of the design printing section 21 to 24 is usually the size of the solid printing section 31 to 34. The thicknesses of the display printing unit 5 and the solid printing unit 31 to 34 are not particularly limited, and are independently, for example, 0.5 μm to 5 μm.

In FIG. 1, design printing sections 21 to 24 (display printing section 5 and solid printing sections 31 to 34) that can be visually recognized when viewed from the surface side of the heat-shrinkable film 1 are drawn with solid lines. When viewed from the back surface side of the heat-shrinkable film 1, the display printing section 5 covered with the solid printing sections 31 to 34 is not clearly visible, so that the display printing section 5 is not drawn in FIG. Although FIG. 3 is also a view seen from the back surface side of the heat-shrinkable film 1, in FIG. 3, the display printing portion 5 covered with the solid printing portions 31 to 34 is drawn by a broken line.

The plan view shape of the solid printing portions 31 to 34 is not particularly limited, but is usually a substantially rectangular shape or a substantially square shape in the plan view. The solid printing portions 31 to 34 having a substantially rectangular shape or a substantially square shape in a plan view are arranged so that one side thereof is parallel to the longitudinal direction. In the illustrated example, the solid printing portions 31 to 34 have a substantially rectangular shape in a plan view, and their long sides are arranged parallel to the short side. The plan view shape of the solid printing portions 31 to 34 is not limited to a plan view substantially rectangular shape or a substantially square shape, and may be another shape such as a plan view substantially circular shape, a substantially elliptical shape, or a substantially parallel quadrilateral shape. Good (not shown).

In the present specification, "abbreviation" means an allowable range in the technical field to which the present invention belongs. For example, an "abbreviation" of a substantially rectangular shape, a substantially square shape, or a substantially parallel quadrilateral shape means, for example, a shape in which corners are chamfered, a shape in which a part of a side is slightly bulged or recessed, or a shape in which a side is slightly curved. Shape etc. are included. Further, the substantially circular and substantially elliptical "abbreviations" include, for example, a shape in which a part of the circumference is slightly bulged or recessed, a shape in which a part of the circumference is slightly straight or diagonal, and the like.

As described above, in FIGS. 1 and 2, in each of the design rows X1 to X4, a plurality of design printing portions 21 to 24 are arranged in the longitudinal direction of the heat-shrinkable film 1, but the designs are adjacent to each other in the longitudinal direction. Between the printing portions 21 to 24, transparent portions 41 to 44 extending in the lateral direction are provided. The transparent portions 41 to 44 are film regions of the transparent heat-shrinkable film 1 in which the design printing portions 21 to 24 are not provided. The transparent portions 41 to 44 are colorless and transparent or colored and transparent like the heat-shrinkable film 1, and are preferably colorless and transparent.

The transparent portions 41 to 44 extend in the lateral direction, and when the solid printing portions 31 to 34 have a substantially rectangular shape (or a substantially square shape) in a plan view, the transparent portions 41 to 44 are short sides. It is a region extending in a straight band shape in the direction. Hereinafter, the transparent portions 41 to 44 existing between the design printing portions 21 to 24 adjacent to each other in the longitudinal direction are referred to as "line-to-line transparent portions 41 to 44". Therefore, each design column (first design column X1, second design column X2, third design column X3, fourth design column X4) is composed of a design printing section 21 to 24 and a line spacing transparent section 41 to 44, respectively. , The design printing portions 21 to 24 and the line spacing transparent portions 41 to 44 are alternately arranged in the longitudinal direction.

Hereinafter, when distinguishing the design printing sections 21 to 24, the solid printing sections 31 to 34, and the line spacing transparent sections 41 to 44 of the first to fourth design columns X1 to X4, the first one is added to the beginning of these terms. , 2nd, 3rd, 4th are attached.

The transparent portions 41 to 44 between the first to fourth lines are all in the shape of a plan view band extending in the lateral direction. The first line spacing transparent portion 41 and the second line spacing transparent portion 42 are discontinuous in the lateral direction. Discontinuity between the first line spacing transparent portion 41 and the second line spacing transparent portion 42 in the lateral direction means that the width of the first line spacing transparent portion 41 is the same as the width of the first line spacing transparent portion 41 from the lateral edge of the first line spacing transparent portion 41. This means that the virtual band does not overlap all or part of the second line-to-line transparent portion 42 when the band is extended in the lateral direction.

The width of the first line-to-line transparent portion 41 refers to the length in the longitudinal direction of the line-to-line transparent portion, and when the width of the first-line-to-line transparent portion 41 is not constant (that is, when the first-line-to-line transparent portion 41 is not in the shape of a plan view band). ), The minimum value. Therefore, when the first line-to-line transparent portion 41 has a plane view band shape, the width of the virtual band is equal to the width of the first line-to-line transparent portion 41, and when the first line-to-line transparent portion 41 does not have a plane view band shape. The width of the virtual band is equal to the minimum width of the first line-to-line transparent portion 41.

Further, in the positional relationship between the second line spacing transparent portion 42 and the third line spacing transparent portion 43, the second line spacing transparent portion 42 and the third line spacing transparent portion 43 are discontinuous in the lateral direction. The discontinuity between the second line spacing transparent portion 42 and the third line spacing transparent portion 43 in the lateral direction means that the above-mentioned "What is the discontinuity between the first line spacing transparent portion 41 and the second line spacing transparent portion 42 in the lateral direction?" In the explanation, "first" shall be read as "second" and "second" shall be read as "third".

Regarding the positional relationship between the third line spacing transparent portion 43 and the fourth line spacing transparent portion 44, the third line spacing transparent portion 43 and the fourth line spacing transparent portion 44 are discontinuous in the lateral direction. The discontinuity between the third line spacing transparent portion 43 and the fourth line spacing transparent portion 44 in the lateral direction means that the above-mentioned "the first line spacing transparent portion 41 and the second line spacing transparent portion 42 are discontinuous in the lateral direction". In the explanation, "first" shall be read as "third" and "second" shall be read as "fourth".

Since the design column is not limited to four columns, if the above positional relationship is generalized, the positional relationship between the row spacing transparent portion of the odd-numbered columns and the row spacing transparent portion of the even-numbered columns is the row spacing transparent portion of the odd-numbered columns and the even number. The row-to-row transparent part of the column is discontinuous in the lateral direction.

Regarding the positional relationship between the first line spacing transparent portion 41 and the third line spacing transparent portion 43, the first line spacing transparent portion 41 and the third line spacing transparent portion 43 are continuous in the lateral direction. The continuity of the first line spacing transparent portion 41 and the third line spacing transparent portion 43 in the lateral direction is the same as the width of the first line spacing transparent portion 41 from the lateral edge of the first line spacing transparent portion 41 as described above. When a virtual band having a width is extended in the lateral direction, it means that the virtual band overlaps all or a part of the third line spacing transparent portion 43, and preferably, the virtual band overlaps the third line spacing transparent portion 43. It means that it overlaps with all of.

Regarding the positional relationship between the second line spacing transparent portion 42 and the fourth line spacing transparent portion 44, the second line spacing transparent portion 42 and the fourth line spacing transparent portion 44 also have the positional relationship between the first line spacing transparent portion 41 and the third line spacing transparent portion 43. Similarly, it is continuous in the lateral direction. Similarly, when the above positional relationship is generalized, in the positional relationship between the row-to-row transparent parts of the odd-numbered columns and the row-to-row transparent parts of the even-numbered columns, the row-to-row transparent parts of the odd-numbered columns and the row-to-row transparent parts of the even-numbered columns are short. The row spacing transparent portion of the even column and the row spacing transparent portion of the even column which are continuous in the hand direction are continuous in the short direction.

Regarding the positional relationship between the first line-to-line transparent portion 41 and the second design printing portion 22 (second solid printing portion 32), the first-line spacing transparent portion 41 has both ends 22a in the longitudinal direction of the second design printing portion 22 in the short direction. , 22b, preferably located between the longitudinal edge 22a of the second design printing section 22 and the longitudinal midpoint in the lateral direction. In the present specification, the midpoint refers to the midpoint (1/2 length) between the edges of both ends.

Regarding the positional relationship between the second line-to-line transparent portion 42 and the third design printing portion 23 (third solid printing portion 33), the second-line spacing transparent portion 42 has both ends 23a in the longitudinal direction of the third design printing portion 23 in the short direction. , 23b, preferably located between the longitudinal edge 22a of the third design printing section 23 and the longitudinal midpoint in the lateral direction. Regarding the positional relationship between the third line spacing transparent portion 43 and the fourth design printing section 24 (fourth solid printing section 34), the third line spacing transparent section 43 has both ends 24a in the longitudinal direction of the fourth design printing section 24 in the short direction. , 24b, preferably located between the longitudinal edge 24a and the longitudinal midpoint of the fourth design printing section 24 in the lateral direction. To generalize the above positional relationship, in the positional relationship between the row spacing transparent portion of the odd-numbered columns and the design printing portion of the even-numbered columns, the row spacing transparent portion of the odd-numbered columns is the edge of both ends in the longitudinal direction of the design printing portion of the even-numbered columns in the short direction. It is placed in between. In the positional relationship between the even-numbered row spacing transparent portion and the odd-numbered column design printing portion, the even-numbered column line spacing transparent portion is arranged between both edges of the odd-numbered column design printing portion in the longitudinal direction in the lateral direction.

Further, in each of the design rows X1 to X4, the design printing portions 21 to 24 adjacent to each other in the lateral direction of the heat-shrinkable film 1 may be continuous or arranged at predetermined intervals in the lateral direction. You may be. In the illustrated example, the design printing units 21 to 24 adjacent to each other in the lateral direction are not continuous and are arranged at predetermined intervals. Therefore, a transparent portion 6 is provided between the design printing portions 21 to 24 adjacent to each other in the lateral direction.

The transparent portion 6 extends linearly over the entire longitudinal direction, and when the design printing portions 21 to 24 have a substantially rectangular shape (or a substantially square shape) in a plan view, the transparent portion 6 has a substantially rectangular shape (or a substantially square shape). It is a region extending in a strip shape in the longitudinal direction. Hereinafter, the transparent portion 6 existing between the adjacent design printing portions 21 to 24 in the lateral direction is referred to as "inter-row transparent portion 6". Therefore, the inter-row transparent portion 6 is arranged between the design rows X1 to X4. The transparent portions 6 between the rows are preferably substantially the same shape and the same size in a plan view.

The width of each line-to-line transparent portion 41 to 44 is independently, not particularly limited, and is appropriately set, but is, for example, 3 mm to 10 mm. The width of the inter-row transparent portion 6 (the length of the inter-row transparent portion 6 in the lateral direction) is not particularly limited and is appropriately set, but is, for example, 3 mm to 10 mm. From the viewpoint of the sizes of the design printing section 21 to 24, the solid printing section 31 to 34, and the line spacing transparent section 41 to 44, it is preferable that the relationship of the following formula is satisfied.
Formula: (longitudinal length of the design printed portion-longitudinal length of the line-to-line transparent portion) x 1/2> width of the joining member.

With reference to FIG. 3, the longitudinal length L2 of the design printing portions 21 to 24 is the length between the longitudinal end edges of the design printing portions 21 to 24, and the longitudinal lengths of the line spacing transparent portions 41 to 44. As described above, the L4 is the width of the line spacing transparent portions 41 to 44. For example, in the first design column X1, the first design printing section 21 (first solid printing section 31) and the first line-to-line transparent section 41 are formed in a size satisfying the above formula. The other design rows are also formed in a size that satisfies the above formula. For example, in the second to fourth design columns X2 to X4, the second to fourth design printing sections 22 to 24 (second to fourth solid printing sections 32 to 34) and the second to fourth line spacing transparent sections are similarly formed. 42 to 44 are each formed to have a size satisfying the above formula.

<Manufacturing method of shrink label raw fabric>
The shrink label raw fabric A can be obtained, for example, by the following method. However, the shrink label raw fabric A is not limited to the one obtained by the following manufacturing method.

The shrink label original fabric A is formed by a step of transporting a long strip-shaped heat-shrinkable film 1 in the longitudinal direction and a step of printing ink on the heat-shrinkable film 1 during transport to form design printing portions 21 to 24. can get. The printing method for forming the design printing portions 21 to 24 is a letterpress printing method using a cylindrical plate in which a sheet-shaped printing plate is wound around a plate cylinder, and a flexographic printing method using a cylindrical plate is preferable. Is.

FIG. 6 shows the printing machine 7. The thin arrows in FIG. 6 indicate the transport direction of the heat-shrinkable film 1. A printing machine 7 is arranged in the middle of feeding the heat-shrinkable film 1 in the longitudinal direction. The printing machine 7 has, for example, a cylindrical plate of a flexographic printing method. In the illustrated example, the case of printing three types of ink is shown (thus, three cylindrical plates are arranged). For example, as shown in the above illustrated example, the design printing units 21 to 24 include a display printing unit 5 representing characters, a display printing unit 5 representing a pattern having a different color from the characters, and solid printing units 31 to 34. In the case of, a cylindrical plate (first cylindrical plate, second cylindrical plate, third cylindrical plate) for letterpress printing of different inks is arranged. However, the number of cylindrical plates is not limited to this.

Specifically, as shown in FIG. 6, the printing machine 7 has a center drum 71 that conveys the heat-shrinkable film 1 and a plurality of cylindrical plates arranged around the center drum 71 with the heat-shrinkable film 1 interposed therebetween. (For example, the first cylindrical plate 81, the second cylindrical plate 82, and the third cylindrical plate 83). For example, the third cylindrical plate 83, the second cylindrical plate 82, and the first cylindrical plate 81 are arranged in this order from the upstream side to the downstream side in the transport direction of the heat-shrinkable film 1.

The cylindrical plates 81 to 83 are provided with anilox roll 72 and a doctor chamber 73, respectively. Ink adheres to the anilox rolls 72 from the doctor chamber 73, the ink is transferred from the anilox rolls 72 to the letterpresses of the cylindrical plates 81 to 83, and the ink is transferred from the letterpresses of the cylindrical plates 81 to 83 to the heat shrinkable film 1. NS. The cylindrical plates 81 to 83 include a cylindrical plate cylinder 89 and a sheet-shaped printing plate (first printing plate 811, second printing plate 821, third printing plate 831) wound around the plate cylinder 89. , Have. The sheet-shaped printing plates 811 to 83 are, for example, those in which a letterpress is formed on a flexible sheet such as an elastomer or rubber. As the printing press 7 such as the plate cylinder 89, the sheet-shaped printing plate 811 to the anilox roll 72, and the doctor chamber 73, those used in a conventionally known flexographic printing method can be used.

7 (a) and 7 (b) show a first cylindrical plate 81 for letterpress printing of the solid printing portions 31 to 34, and FIG. 8 shows a first printing plate constituting the first cylindrical plate 81. 811 is shown. The first cylindrical plate 81 includes a columnar plate cylinder 89 having a support shaft 891, a sheet-shaped first printing plate 811 (see FIG. 8) wound around the plate cylinder 89, and a first printing plate 811. It has a joint adhesive 88 that fills the seams at both ends of the. The circumferential length and the axial length of the letterpress 819 of the first printing plate 811 are equal to the longitudinal length and the lateral length of the solid printing portions 31 to 34.

As shown in FIG. 8, the first printing plate 811 has a letterpress 819 for printing the solid printing portions 31 to 34 formed on the surface thereof. The letterpress 819 is provided at a plurality of locations at predetermined intervals in the axial direction and the circumferential direction when the sheet-shaped first printing plate 811 is wound around the plate cylinder 89. The number of letterpresses 819 in the axial direction corresponds to the number of rows of the design printing sections 21 to 24 (solid printing sections 31 to 34). For example, as described above, the heat shrinkable film 1 has the first to fourth designs. When forming rows X1 to X4, four letterpress rows (first to fourth letterpress rows) are provided at predetermined intervals in the axial direction. The distance between the letterpress rows adjacent to each other in the axial direction is equal to the width of the inter-row transparent portion 6 of the design printing portions 21 to 24 (solid printing portions 31 to 34). Between the letterpress rows adjacent to each other in the axial direction, there is an inter-row recess 818 (this recess is a portion recessed due to the relative unevenness relationship with the letterpress), and ink is not transferred in this inter-row recess 818. .. Therefore, the area of the heat-shrinkable film 1 corresponding to the inter-row recess 818 is non-printing (inter-row transparent portion 6).

Further, the distance between the letterpress 819s adjacent to each other in the circumferential direction of each letterpress column is equal to the width of the line spacing transparent portions 41 to 44 of the design printing portions 21 to 24. Between the letterpress 819s adjacent to each other in the circumferential direction, there is an interline recess 8171 (this recess is a portion recessed due to the relative unevenness relationship with the letterpress), and ink is not transferred in this interline recess 8171. Therefore, the area of the heat-shrinkable film 1 corresponding to the line-to-line recess 8171 is non-printing (line-to-line transparent portions 41 to 44).

In order to form a shrink label original fabric A in which the transparent portion 41 between the first row and the transparent portion 42 between the second rows are discontinuous in the lateral direction, two letterpress columns adjacent to each other in the axial direction (the interline recess between them is It is provided so as to be offset in the circumferential direction (so that it is not continuous in the axial direction). That is, the line spacing recess 8171 is discontinuous in the axial direction. Specifically, the first row spacing recess 8171 of the first letterpress column is axially discontinuous with the second row spacing recess 8172 of the second letterpress column, and the second row spacing recess 8172 of the second letterpress column is the third row spacing recess 8172. The third row spacing recess 8173 of the letterpress column is discontinuous in the axial direction, and the third row spacing recess 8173 of the third letterpress column is axially discontinuous with the fourth row spacing recess 8174 of the fourth letterpress column. In other words, the second letterpress 819 of the second letterpress column exists on the axial side of the first row spacing transparent portion 41 of the first letterpress column, and the axial side of the second row spacing transparent portion 42 of the second letterpress column. The third letterpress 819 of the third letterpress column exists on the side, and the fourth letterpress 819 of the fourth letterpress column exists on the axial side of the third row-to-row transparent portion 43 of the third letterpress column. Since the sheet-shaped first printing plate 811 is wound around the plate cylinder 89, a letterpress cannot be formed at the seams at both ends of the first printing plate 811, and the seams become line spacing recesses 8171.

The third cylindrical plate is a cylindrical plate that letterpress prints the display printing unit 5 (or the display printing unit 5 that represents a pattern) that represents characters, and the second cylindrical plate is a display printing unit that represents a pattern. This is a cylindrical plate for letterpress printing of 5 (or a display printing unit 5 representing characters). The second and third cylindrical plates are the same as the configuration of the first cylindrical plate 81, except that each letterpress can print a display such as characters and patterns.

<< Transport process >>
As shown in FIG. 6, the long strip-shaped heat-shrinkable film 1 is conveyed in the longitudinal direction. When the heat-shrinkable film 1 is fed along the periphery of the center drum 71, letterpress printing is sequentially applied to the heat-shrinkable film 1 in the printing process described later.

<< Printing process >>
With reference to FIG. 6, a display printing unit 5 for displaying characters, for example, is letterpress-printed on the back surface of the heat-shrinkable film 1 sent to the center drum 71 by the third cylindrical plate 83. Next, the second cylindrical plate 82 is used for letterpress printing of color ink on the back surface of the heat-shrinkable film 1, for example, a display printing unit 5 for displaying a pattern is formed, and the first cylindrical plate 81 is used for heat-shrinkability. Color ink is letterpress-printed on the back surface of the film 1 while overlapping the display printing section 5, to form a solid printing section 31.

Depending on the type of ink, the ink is dried or irradiated with ionizing radiation such as ultraviolet rays to cure each ink. The obtained shrink label raw fabric A is usually wound around a winding portion 74 having a core material. FIG. 9 shows a roll body B in which the shrink label raw fabric A is wound around the core material in a roll shape.

<Example of using shrink label original fabric>
In the shrink label original fabric A of the present disclosure, an image (design) represented by the design printing unit 21 is repeatedly arranged in the longitudinal direction. The shrink label raw fabric A is processed into a tubular label, a wrapping label, or the like for use. For example, when processing the shrink label raw fabric A into a tubular label, first, the shrink label raw fabric A is divided into a long sheet C composed of a single row of design rows. Specifically, the shrink label raw fabric A is pulled out from the roll body B, and the shrink label raw fabric A is lengthened at the boundary between the design rows X1 to X4 (for example, the transparent portion 6 between rows) indicated by the thick arrows in FIG. Cut parallel to the direction. Then, a long sheet C including one row of design rows X1 can be obtained. As shown in FIG. 2, in the case of the shrink label original fabric A provided with four rows of design rows X1 to X4 in the lateral direction, four long sheets C can be obtained. The right side portion and the left side portion (so-called ear portion) of the shrink label original fabric A in the lateral direction are discarded.

FIG. 10 shows one long sheet C obtained by dividing the shrink label original fabric A. As shown in FIG. 11, the long sheet C is rolled into a tubular shape with the back surface side inside, and the left end portion C1 and the right end portion C2 in the lateral direction are overlapped and adhered to form a long cylinder. The shape label continuum D is obtained. By detecting the line spacing transparent portions 41 to 44 of the long tubular label continuum D with a sensor and cutting the tubular label continuum D in the line spacing transparent portions 41 to 44 in parallel in the lateral direction, the tubular label continuum D is cut in parallel in the lateral direction. A tubular label including one design printing unit 21 to 24 can be obtained. Since the obtained tubular label has the heat-shrinkable film 1, it is externally fitted to an adherend such as a container and attached to the adherend by heating.

Further, one design printing unit 21 is formed by detecting the line-to-line transparent portion 41 of the long sheet C shown in FIG. 10 with a sensor and cutting the long sheet C in the line-to-line transparent portion 41 in parallel in the lateral direction. A sheet-fed label E containing it is obtained. This single-wafer-shaped label E can be used as a wrapping label.

The single-wafer-shaped label E is attached so as to be wrapped around an adherend F such as a container, for example, as shown in FIGS. 12 (a) and 12 (b). A label by such a mounting method is also called a wrapping label. An adhesive is applied to the back surface of at least one end of the wrapping label, and as shown in FIG. 12A, one end E1 is attached to an adherend F such as a container to attach the wrapping label E. After wrapping around the adherend, as shown in FIG. 12B, the back surface of the other end E2 is attached to the front surface of one end E1 (or the back surface of the other end E2 is attached). Attach it to the adherend F). In FIGS. 12 (a) and 12 (b), the design printing unit 21 (display printing unit 5 and solid printing unit 31) that can be visually recognized when viewed from the front surface side is drawn with solid lines. Finally, by heating, the winding label E having the heat-shrinkable film 1 is heat-shrinked and attached to the adherend F.

<Effect of shrink label original fabric>
In the shrink label original fabric A of the present disclosure, the design printing sections 21 to 24 are neatly represented by letterpress printing. Specifically, when the shrink label raw fabric A is manufactured, as described above, the design printing unit 21 to print the ink on the heat-shrinkable film 1 by letterpress printing using the first cylindrical plate 81. 24 is formed. In general, as the cylindrical plate rotates, the letterpress plate comes into contact with the heat-shrinkable film (the ink is transferred at this time), and the inter-row recesses and the inter-row recesses do not come into contact with the heat-shrinkable film. Toppan printing is performed while repeating. In the process of transition from the contact of the letterpress to the non-contact of the interline recess, the cylindrical plate vibrates, causing so-called bouncing.

In this regard, in the present disclosure, since the inter-row recesses 8171 of the first letterpress column of the first cylindrical plate 81 and the inter-row recesses 8172 of the second letterpress column are discontinuous in the axial direction, the first cylindrical plate 81 When the row spacing recess 8171 of the first letterpress column faces the heat-shrinkable film 1, the letterpress 819 of the second letterpress column is in contact with the heat-shrinkable film 1. That is, when the first cylindrical plate 81 is rotated, the letterpress 819 of at least one letterpress row of the plurality of letterpress rows always comes into contact with the heat shrinkable film 1. Therefore, it becomes difficult for the first cylindrical plate 81 to bounce. The design printing units 21 to 24 that are letterpress-printed using the first cylindrical plate 81 that is difficult to bounce are not likely to lose ink and are clearly represented.

In particular, the solid printing portion has a relatively large area, and ink transfer defects due to bouncing are likely to occur. In other words, ink loss is likely to be noticeable. However, according to the present disclosure, the solid printing portion is clean without ink loss. Solid printing units 31 to 34 can be represented. The cylindrical plate (for example, the second cylindrical plate and the third cylindrical plate) that prints the display printing part that represents characters and patterns, depends on the arrangement of the characters and patterns, but the letterpress always comes into contact with the plate during its rotation. However, bouncing may occur in this respect. In the solid printing section 31 made of solid printing, light coloring due to ink loss is easily noticeable in appearance, but in the display printing section 5 representing characters, patterns, etc., even if light coloring occurs due to ink loss, the appearance is too much. It may not be noticeable. In practice, it is the solid printing section 31 that causes the problem of printing defects to become more prominent due to ink loss due to bouncing. Can be obtained.

By the way, as described above, at the time of manufacturing the shrink label raw fabric A, ink is printed on the heat-shrinkable film 1 to form the design printing portions 21 to 24. In that case, for example, a camera is provided. The print suitability of the design printing units 21 to 24 is checked by an image inspection device or the like. Even if a printing defect (printing defects include printing omission, entanglement, stains, etc.) is detected in the design printing unit 21, the shrink label original fabric A is mechanically and continuously manufactured. The printing machine 7 is not stopped during the process, and the shrink label original fabric A is once produced and wound into a roll. After that, the shrink label original fabric A is pulled out from the roll body B, the printing defective portion of the design printing portion 21 is removed, the shrink label original fabric A is joined by a joining member, and the shrink label original fabric A is wound up again in a roll shape.

Specifically, during the production of the shrink label original fabric A, for example, as shown in FIG. 13, one of the plurality of design printing units 21 to 24 is applied to the design printing unit (design printing unit 221 indicated by x in FIG. 13). When there is a printing defect, the machine stores the defective design printing unit 221. After the shrink label original fabric A has been manufactured, the shrink label original fabric A is pulled out from the roll body B up to the memorized defective design printing section 221. Next, it is cut in the lateral direction so as to include the defective design printing portion 221 (this cutting line is shown by a thin broken line in FIG. 13). At this time, it is desirable to cut so that the cutting line does not cover the line-to-line transparent portions 41 to 44.

As described above, the sensor detects the line-to-line transparent portion 41 when obtaining the tubular label including one design printing portion 21 or the sheet-fed label E from the tubular label continuum D or the long sheet C. However, if the joining member is attached to the line-to-line transparent portion 41, the sensor may not be able to accurately detect the line-to-line transparent portion 41. Therefore, it is desirable to cut so that the cutting line does not cover the line-to-line transparent portions 41 to 44 (so as to divide the design printing portions 21 to 24 in which the cutting lines are arranged in the lateral direction). Further, as will be described later, when the edge of one region of the shrink label original fabric A and the edge of the other region are butted, the design printing portion 21 in which one region is divided and the other region are separated by the splicing. It is desirable to cut the design printing unit 21 so that the design printing unit 21 is combined to form one design printing unit 21. When cut, as shown in FIG. 14, the region including the defective design printing portion 221 is separated from the shrink label original fabric A.

Next, as shown in FIG. 15A, the edge of one region A1 and the edge of the other region A2 of the shrink label original fabric A after removing the region including the defective design printing portion 221 are abutted against each other. The divided design printing unit 21 in the one area A1 and the divided design printing unit 21 in the other area A2 are combined to form one design printing unit 21. Therefore, the forming intervals of the design printing portions 21 to 24 and the line spacing transparent portions 41 to 44 in each design column of the shrink label original fabric A after joining are the same as those of the shrink label original fabric A before joining. Then, as shown in FIG. 15B, the joining member G is attached in the lateral direction so as to straddle the edge portion of the one region A1 and the edge portion of the other region A2. By attaching the joining member G, a shrink label original fabric A in which one region A1 and the other region A2 are joined can be obtained. In FIG. 15B, dots are added to the tape G in order to show the joining member G in an easy-to-understand manner.

Examples of the joining member G include splice tape and the like. Further, the joining member G is made of a material that can mechanically detect the joining member G. For example, a metal foil such as aluminum or a film containing a metal vapor deposition film coated with an adhesive is used. .. The width of the joining member G is not particularly limited, and is, for example, 15 mm to 35 mm. When the joining member G is attached, it is preferable that the joining member G is arranged at a position where it does not overlap all or part of the line spacing transparent portions 41 to 44 of each design column, and further, the row spacing transparent portions of each design column. It is more preferable that they are arranged at positions that do not overlap with any of 41 to 44.

In the shrink label original fabric A of the present disclosure, as described above, the design printing portion 21 and the line spacing transparent portion 41 of the first design column X1 have the formula: (length in the longitudinal direction of the design printing portion-longitudinal direction of the line spacing transparent portion). It is formed so as to satisfy the relationship of length) × 1/2> width of the joining member. Therefore, when joining the one region A1 and the other region A2, the joining member G can be attached so as not to overlap the line spacing transparent portions 41 to 44 of each design column.

As for the spliced shrink label raw fabric A, a long sheet C including the joining member G can be obtained by cutting in parallel with the longitudinal direction as described in <Example of using the shrink label raw fabric>. By forming the long sheet C into a tubular shape, a tubular label continuum D including the joining member G can be obtained. As for the tubular label continuum D including the joining member G, one tubular label can be obtained by detecting the line-to-line transparent portion 41 with a sensor and cutting in the lateral direction. Similarly, for the long sheet C including the joining member G, one single-wafer-shaped label E can be obtained by detecting the line-to-line transparent portion 41 with a sensor and cutting the long sheet C in the lateral direction. Since the joining member G does not overlap the line-to-line transparent portion 41, a sensor detection error does not occur, and the line-to-line transparent portion 41 can be reliably cut.

In this way, a plurality of sheet-fed labels E and tubular labels can be obtained from the long sheet C including the joining member G and the tubular label continuum D, and the joining member G is attached to at least one of them. attached. The single-wafer-shaped label E or the tubular label to which the joining member G is attached is found by a detector that detects the joining member G after (or before) mounting on an adherend such as a container. , Removed from the product.

1 Heat-

shrinkable film

21, 22, 23, 24

Design printing section

31, 32, 33, 34

Solid printing section

41, 42, 43, 44 Transparent section (transparent line spacing)
A Shrink label original fabric C Long sheet G Joining member X1, X2, X3, X4 Design row

Claims

With a long strip of heat-shrinkable film,
A design row comprising a plurality of design printing portions repeatedly printed in the longitudinal direction of the heat-shrinkable film and transparent portions extending in the lateral direction arranged between the design printing portions. It has two or more rows of design rows arranged in the lateral direction of the heat-shrinkable film.
In the first design row and the second design row adjacent to each other in the lateral direction, the transparent portion of the first design row and the transparent portion of the second design row are discontinuous in the lateral direction.
It is a shrink label original fabric that is used by joining those cut along the lateral direction with a joining member.
The shrink label original fabric according to claim 1, wherein the joining member is arranged at a position where it does not overlap with either the transparent portion of the first design row and the transparent portion of the second design row.