JP7196390B2 - Manufacturing method of package with label and package with label - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a package with an indication and a package with an indication.

Conventionally, packages such as pouches have labels containing product information such as names and raw materials. Since such indication differs depending on the product, a label having an indication is prepared for each product, and by attaching this label to the package, product information and the like are displayed on the package (for example, Patent Document 1 reference).

However, when such a label gets wet with water, the label itself may deteriorate and the display may disappear. For this reason, there is a demand for means for printing the above indications instead of labels.

On the other hand, a technique of printing a display by gravure printing is also known (see Patent Document 2, for example). Indications printed by gravure printing are usually printed on the inner side of the package rather than the outer surface, so unlike labels, they do not deteriorate with water and are hard to erase.

JP-A-11-157517 JP 2017-1654636 A

By the way, among the product information, the expiry date and best-before date differ depending on the timing of enclosing the contents in the package, so it is necessary to print them immediately before or after enclosing the contents in the package. Since printing by gravure printing is performed at the manufacturing stage of the package and inside the outer surface of the package, it is difficult to print by gravure immediately before or after enclosing the contents in the package. .

The present invention has been made to solve the above problems. That is, a method for manufacturing a package with a label that is difficult to erase and that can form the label even immediately before or after the contents are enclosed in the package, and a package with a label on which such a label is formed. The purpose is to provide the body.

According to one aspect of the present invention, there is provided a method for manufacturing a package with a display having a display including product information visible from the outside, the package comprising a substrate layer and a printed layer including at least a white ink layer. and a step of irradiating the package with a laser beam to carbonize the composition of the white ink layer to form all the indications on the package. A method is provided.

The above manufacturing method may further include a step of enclosing contents in the package.

According to another aspect of the present invention, a package with a display comprising a base layer and a printed layer, and having a visible display including product information from the outer surface, wherein the printed layer contains at least white ink A package with indicia is provided, comprising a layer, wherein all of the indicia of the package are composed of a char of the composition of the white ink layer.

In the package with the indication, the indication may have a hollow portion.

The package with a display may have two or less painted parts.

In the labeled package, the product information includes at least one of a name, raw material name, expiration date, expiry date, content, nutritional information, storage method, usage method, heating time, manufacturer information, and barcode. may contain

In the package with a display, the package is a laminate comprising the base material layer, the printed layer, and the thermoplastic resin layer in order from the outside, or the outer thermoplastic resin layer, the printed layer, the base material layer, and the inside It may be composed of a laminate having thermoplastic resin layers in order from the outside.

In the labeled package, the package may be a pouch, a lid, a tube container, or a paper container.

In the labeled package, the pouch may be a retort pouch.

In the package with a display, the display may include a barcode, and the height of the barcode may be 25 mm or less.

In the package with a label, contents may be enclosed in the package with a label.

According to one aspect of the present invention, there is provided a method for manufacturing a package with a label that is hard to disappear and that can form the label even immediately before or after the contents are enclosed in the package, and a method for producing such a package. An indicia package having an indicia formed thereon is provided.

1 is a plan view of a package with a display according to the first embodiment; FIG. FIG. 2 is a cross-sectional view of a laminate that constitutes the package with a display in FIG. 1; It is the figure which showed typically the manufacturing process of the package with a display which concerns on 1st Embodiment. FIG. 10 is a plan view of a package with a display according to a second embodiment; FIG. 5 is a cross-sectional view of a laminate that constitutes the package with an indication of FIG. 4; FIG. 11 is a plan view of a package with a display according to a third embodiment; FIG. 7 is a cross-sectional view of a laminate that constitutes the package with a display in FIG. 6; It is a perspective view of the package with a display which concerns on 4th Embodiment. FIG. 9 is a cross-sectional view of a laminate that constitutes the package with a display of FIG. 8; It is a perspective view of the package with a display which concerns on 5th Embodiment. 4 is a graph of the DSC endothermic curve of white ink composition A. FIG. 4 is a graph of the DSC endothermic curve of white ink composition B. FIG.

[First embodiment]
A package with a display according to a first embodiment of the present invention will be described below with reference to the drawings. As used herein, the terms "film", "sheet" and the like are not to be distinguished from each other based solely on the difference in designation. Therefore, for example, the term "film" is used to include members that are also called sheets. 1 is a plan view of a package with a label according to this embodiment, FIG. 2 is a cross-sectional view of a laminate constituting the package with a label of FIG. 1, and FIG. 3 is a package with a label according to this embodiment. It is the figure which showed typically the manufacturing process of a body.

<<<Indicated packaging>>>
A package 10 with a display (hereinafter sometimes simply referred to as "package 10") shown in FIG. 1 is a flat-type pouch. The package 10 is a flat-type pouch, but it may be a standing pouch that can stand on its own.

The package 10 can be suitably used as a retort pouch among pouches. When the package 10 is used as a retort pouch, the package 10 has heat resistance to withstand retort processing. A "retort pouch" herein is a pouch that does not melt during retorting. “Retort treatment” is a treatment to sterilize under heat and pressure. Examples of retort treatment include sterilization at 60° C. or higher and 100° C. or lower and 100 MPa or higher and 800 MPa or lower for 10 minutes to 50 minutes.

The package 10 has an accommodation space (not shown) for accommodating contents. In addition, the package 10 is one in which the contents are accommodated and enclosed in the accommodation space. Contents include, but are not limited to, solids, liquids, or mixtures thereof. Specific contents include hamburgers, meatballs, steamed dumplings, oden, curry, stew, and the like.

The package 10 has a display 11 visible from the outside. The display 11 is entirely composed of a carbide of the components of the white ink layer 22E, which will be described later. The carbide forming the display 11 can be obtained by irradiating the white ink layer 22E with laser light.

<<Display>>
Display 11 contains product information. The display 11 is formed on the surface film 13 to be described later, but may be formed on the back film 14 .

The product information is not particularly limited, but includes, for example, the name, raw material name, expiration date, expiry date, content amount, nutrition ingredient display, usage method, heating time, manufacturer, barcode 11A, logo, symbol, etc. . "Name, raw material name, expiration date, expiry date, content amount, nutritional information, usage method, heating time, manufacturer information" in this specification are "name", "raw material name", "expiration date", " Expiration date”, “capacity”, “nutrition label”, “preservation method”, “usage method”, “heating time”, and “manufacturer” and the specific contents thereof. In this specification, "specific content" shall mean a description representing the content of each item. For example, the specific content of the name is the name of the specific content (e.g., "curry"), and the specific content of the raw material name is the name of the specific raw material (e.g., "onion, carrot", etc.). The specific contents of the best-before date and expiry date are specific dates (for example, "xxxxxx year x x month x x day, etc.), and the specific content of the content is the specific weight (e.g., “xx g”, etc.), the specific content of the nutrition labeling is a specific nutritional component (e.g., “energy xx kcal”, etc.), and the specific content of the method of use is a specific A description of a specific usage method (for example, a statement to the effect that "please warm without wrapping"), and the specific content of the heating time is a specific heating time (for example, "XX minutes" etc.) be.

It is preferable that the height H of the bar code 11A is 25 mm or less. Although the barcode differs depending on the product, if the area of the barcode is large, it takes a relatively long time to form the hard code with the laser beam. display formation time can be shortened. From the viewpoint of reading the barcode 11A accurately, it is preferable that the lower limit of the height H of the barcode 11A is 6 mm or more.

The display 11 may have a hollow portion 11B. By having the hollow portion 11B, it is possible to obtain a display effect such as making it conspicuous, and since it is not painted over, the formation time can be shortened compared to the painted portion 11C, which will be described later. In this specification, the "hollow part" means that in an arbitrary display, the inside of the area surrounded by the edge of the display (line composed of carbide of the constituent of the white ink layer) and constituting the display is white It shall mean a portion that is not filled with charred constituents of the ink layer (for example, a line made up of charred constituents of the white ink layer). In the present specification, the term “a line composed of charcoalized substances constituting the white ink layer” is a concept including a line formed by connecting dots composed of charcoalized substances constituting the white ink layer. The hollow portion 11B is not particularly limited, but may be, for example, a hollow character.

The display 11 may have the painted portions 11C, but since it takes time to form the painted portions 11C by irradiating the laser beam, the number of the painted portions 11C is two or less in order to shorten the display formation time. There is preferably one, preferably one, and more preferably zero. In this specification, the “filled portion” means that, in an arbitrary display, the area surrounded by the edge of the display (a line composed of the carbide of the structure of the white ink layer) and constituting the display is filled with white ink. It shall mean a portion filled with chars of the composition of a layer (for example, a line composed of chars of the composition of a white ink layer). It can be confirmed by observation with an optical microscope whether or not a line composed of carbides of the constituents of the white ink layer is present in this region. The painted-out portion may be painted to such an extent that it can be visually recognized as painted-out, and does not need to be completely painted without gaps. When the filled part is composed of a plurality of divided parts (for example, a plurality of characters), and when it is recognized as an integral part in terms of appearance, name, and/or concept, each part is Instead of using each of them as a painted-out portion, a single painted-out portion is used as a whole. The painted-out portion 11C is not particularly limited, but may be, for example, a painted-out character or the like.

The package 10 includes a surface film 13, a back film 14 facing the surface film 13, and a peripheral seal that is a portion that seals between the surface film 13 and the back film 14 along the peripheral edges of the surface film 13 and the back film 14. a portion 15; The peripheral seal portion 15 is composed of a side seal portion 15A, a side seal portion 15B located on the opposite side of the side seal portion 15A, an upper seal portion 15C and a bottom seal portion 15D. In addition, since the contents are contained in the package 10, the peripheral edge seal portion 15 is formed along all the peripheral edges of the surface film 13 and the back film 14. In order to accommodate the contents, for example, the upper seal portion may not be formed. The package 10 may also include a notch 16 that may serve as a starting point for opening.

<<Surface Film and Back Film>>
The surface film 13 and the back film 14 are composed of a laminate 20 shown in FIG. The laminate 20 includes a substrate layer 21 , a printed layer 22 , a bonding layer 23 , a barrier layer 24 , a bonding layer 25 and a thermoplastic resin layer 26 in this order from the outside of the package 10 . However, the laminate 20 only needs to include the base material layer 21 and the print layer 22, and does not need to include at least one of the bonding layers 23 and 25, the barrier layer 24, and the thermoplastic resin layer 26.

<Base material layer>
As the base material layer 21, for example, a plastic film is preferable. The plastic film may be an oriented polyethylene terephthalate film, a silica-deposited oriented polyethylene terephthalate film, an alumina-deposited oriented polyethylene terephthalate film, an oriented nylon film, an oriented polypropylene film, a polypropylene/ethylene-vinyl alcohol copolymer co-extruded co-stretched film, or these. A composite film in which two or more films are laminated can be used.

The substrate layer 21 is preferably biaxially stretched. As a result, the molecules constituting the base material layer 21 are arranged in the drawing direction by the drawing treatment, and the base material layer 21 exhibits excellent dimensional stability. In addition, the biaxial stretching process can impart an easy-open property to the base material layer 21 .

The thickness of the base material layer 21 is preferably 10 μm or more and 50 μm or less. If the thickness of the base material layer 21 is 10 μm or more, the heat resistance required for the package 10 can be satisfied, and if it is 50 μm or less, the product cost can be suppressed. The thickness of the substrate layer is obtained by randomly measuring ten thicknesses from a cross-sectional photograph of the substrate layer taken with an optical microscope, and calculating the arithmetic mean value of the measured thicknesses.

It is preferable that the surface of the substrate layer 21 on the side of the printed layer 22 is surface-treated from the viewpoint of improving adhesion to the printed layer 22 . The surface treatment may be plasma treatment, corona discharge treatment, ozone treatment, low-temperature plasma treatment, or glow treatment, and any one of the primer layer, anchor coat layer, and undercoat layer may be used. It may be a surface treatment by forming.

<Print layer>
The printing layer 22 is composed of a plurality of ink layers 22A-22E including at least a white ink layer 22E. Specifically, for example, the printed layers are formed in the order of black ink layer/indigo ink layer/red ink layer/yellow ink layer/white ink layer from the outside toward the inside. However, the printed layer 22 may not include the ink layers 22A to 22D other than the white ink layer 22E. The printed layer 22 can be formed by printing such as gravure printing.

The thickness of the printed layer 22 is preferably 1.5 μm or more and 4.5 μm or less. If the film thickness of the printed layer 22 is 1.5 μm or more, a clearer display 11 can be formed. can be suppressed. The "thickness of the printed layer" as used herein is the total thickness of all the ink layers. The film thickness of the printed layer 22 can be measured by the same method as for the base material layer 21 .

The laminate strength between the base layer 21 and the printed layer 22 is preferably 0.5 N/15 mm or more. Laminate strength is measured using a measurement sample cut out from the package to a width of 15 mm, and using a Tensilon tensile tester at a tensile speed of 50 mm / min in accordance with JIS K6854-1: 1999. The printed layer is removed from the base layer. It shall be measured by peeling in the direction of 90 degrees. The lamination strength is the arithmetic mean value of the values obtained by measuring 5 times.

<Each ink layer other than the white ink layer>
Each ink layer 22A to 22D other than the white ink layer 22E contains a coloring material and a binder resin. Each of the ink layers 22A to 22D may contain other optional additives. Additives include, for example, lubricants, antiblocking agents, fillers, curing agents, pigment dispersants, antifoaming agents, leveling agents, waxes, silane coupling agents, preservatives, antioxidants, ultraviolet absorbers, antirust agents, agents, plasticizers, flame retardants, color developers, and the like. These additives are used particularly for the purpose of improving printing suitability, printing effect, etc., and the type and amount used can be appropriately selected according to the printing method, printing substrate, and printing conditions.

(colorant)
The coloring material is not particularly limited, and known pigments and dyes can be used, and are appropriately selected according to the desired color.

(binder resin)
Examples of binder resins include linseed oil, tung oil, soybean oil, hydrocarbon oils, rosin, rosin esters, rosin-modified resins, shellac, alkyd resins, phenolic resins, maleic acid resins, natural resins, hydrocarbon resins, Polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, (meth) acrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, aminoalkyd base resins, nitrocellulose, ethyl cellulose, chlorinated rubber, cyclized rubber, polymers of (meth)acrylate compounds, or mixtures thereof.

<White ink layer>
The white ink layer 22E contains white pigment and binder resin. From the viewpoint of obtaining a clear display 11, the white ink layer 22E preferably further contains a coloring agent. The white ink layer 22E may contain other optional additives. Additives include, for example, coloring aids, lubricants, antiblocking agents, fillers, curing agents, pigment dispersants, antifoaming agents, leveling agents, waxes, silane coupling agents, preservatives, antioxidants, and UV absorbers. agents, rust inhibitors, plasticizers, flame retardants, color developers, and the like. These additives are used particularly for the purpose of improving printing suitability, printing effect, etc., and the type and amount used can be appropriately selected according to the printing method, printing substrate, and printing conditions.

(white pigment)
The white pigment is not particularly limited, but for example, titanium oxide can be used. The content of the white pigment in the white ink layer 22E is preferably 5% by mass or more and 90% by mass or less. If the content of the white pigment is 5% by mass or more, a discolored region can be formed in the white ink layer 22 by the carbonization of the binder resin by irradiation with laser light, and a clear second display 12 can be obtained. Also, if the content is 90% by mass or less, sufficient adhesion to the ink layer 22D can be obtained. The lower limit of the white pigment content is preferably 20% by mass or more, and the upper limit is preferably 50% by mass or less.

(binder resin)
The binder resin forming the white ink layer 22E preferably has at least one endothermic peak in an endothermic curve during temperature rise measured with a differential scanning calorimeter (DSC). Since the binder resin has the endothermic peak, the crystalline resin absorbs the energy of the laser beam and softens (melts) when irradiated with the laser beam. It is possible to suppress the occurrence of pinholes on the surface of the. The binder resin having the endothermic peak can be obtained by including a crystalline resin. The term "crystalline resin" used herein refers to a resin having at least one endothermic peak in an endothermic curve measured with a differential scanning calorimeter (DSC) when the temperature is raised. In general, a binder resin consisting of only an amorphous resin is often used for the white ink layer, and the endothermic curve obtained by a differential scanning calorimeter shows only a gentle curve due to the glass transition of the amorphous resin. observed, and often no endothermic peak is observed.

The binder resin constituting the white ink layer 22E may have one or more endothermic peaks in the range of 50° C. to 165° C. in the endothermic curve from the viewpoint of suppressing damage to the base layer 21 by the laser beam. preferable.

The binder resin constituting the white ink layer 22E is a crystal of all absorption peaks observed in the range of 50° C. to 165° C. when the heat of crystal melting (ΔHm (mJ/mg)) at the endothermic peak temperature (Tm) is measured. The total heat of fusion (ΔHmt) is preferably 0.1 mJ/mg or more and 1000 mJ/mg or less. When the total amount of heat of crystalline fusion (ΔHmt) is 0.1 mJ/mg or more, the desired line width and color development can be obtained, and the display 11 with good visibility can be formed. /mg or less, it is possible to prevent the coating film of the white ink layer 22E from becoming hard. The endothermic peak temperature (Tm) is obtained from an endothermic curve measured by heating at a heating rate of 10°C/min according to JIS K7121:1987 and K7122:1987. Also, the heat of crystal fusion (ΔHm) is obtained from the endothermic peak area.

Examples of the binder resin that constitutes the white ink layer 22E include linseed oil, tung oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin-modified resin, shellac, alkyd resin, phenolic resin, maleic acid resin, Natural resin, hydrocarbon resin, polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, (meth)acrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea Resins, melamine resins, amino alkyd resins, nitrocellulose, ethyl cellulose, chlorinated rubbers, cyclized rubbers, polymers of (meth)acrylate compounds, or mixtures thereof. Among these, the binder resin preferably contains a crystalline urethane (meth)acrylate polymer from the viewpoint of forming a clearer second display 12 and exhibiting good adhesion to the base material layer 21 .

When the package 10 is a retort pouch, the binder resin preferably contains a polyurethane resin, a chlorinated polypropylene resin, or the like, because heat resistance to withstand retort treatment is required as described above.

The crystallinity of the binder resin is determined by selecting the type of raw material monomer, controlling the degree of polymerization and the amount of crystalline oligomer mixed, controlling heat generation in the mixing process, and heating and cooling in the polymerization process. A person skilled in the art will adjust accordingly. For example, for urethane (meth)acrylate, crystallinity in the binder resin can be increased by using a compound having a molecular chain with small steric hindrance as part of the raw materials (alcohol, (meth)acrylate and isocyanate). .

The content of the binder resin in the white ink layer 22E is preferably 5% by mass or more and 50% by mass or less. If the content of the binder resin is 5% by mass or more, the adhesion to the other ink layer 22D is good, and if it is 50% by mass or less, the content of the white pigment can be maintained to some extent. Therefore, carbide can be easily formed. The lower limit of the binder resin content is preferably 10% by mass or more, and the upper limit is preferably 30% by mass or less.

(color former)
The coloring agent has the function of developing color upon irradiation with laser light and improving heat generation efficiency. Considering that the second display 12 is product information, the coloring agent preferably develops a black color when irradiated with laser light.

Examples of color formers include pigments, dyes, inorganic compounds other than pigments, and the like. Specifically, various organic pigments, inorganic pigments such as diatomaceous earth, talc, and clay, leuco dyes, bismuth, iron, zinc, antimony, tin, nickel, copper, molybdenum, and other metal simple substances, their metal salts, and metal hydroxides. substances, metal oxides, and the like. Among these, inorganic compounds are preferred from the viewpoint of hot water resistance.

Among inorganic compounds, bismuth-based compounds are particularly preferable from the viewpoint of color development by low-output laser light. Examples of bismuth-based compounds include bismuth oxide, bismuth nitrate, bismuth oxynitrate and other bismuth nitrate-based compounds, bismuth chloride and other bismuth halide-based compounds, bismuth oxychloride, bismuth sulfate, bismuth acetate, bismuth citrate, hydroxide Bismuth, titanium bismuth, bismuth titanate, bismuth subcarbonate, and the like. Among these, bismuth hydroxide, bismuth oxide, bismuth subcarbonate and bismuth nitrate are preferred.

In addition, antimony-doped tin oxide has a light hue and exhibits good color development when irradiated with laser light, so it can be suitably used in combination with a white pigment.

The content of the coloring agent in the white ink layer 22E is preferably 1% by mass or more and 50% by mass or less. If the content of the coloring agent is 1% by mass or more, it is possible to compensate for color development, and if it is 50% by mass or less, an effect of improving visibility commensurate with the content of the coloring agent can be obtained. Also, coloring of the white ink layer 22E itself can be suppressed. The lower limit of the content of the coloring agent is preferably 1% by mass or more, and the upper limit is preferably 30% by mass or less.

(coloring aid)
The color-developing auxiliary has a function of improving color-developing efficiency. Inorganic compounds can be used as color development aids. Examples of such inorganic compounds include metal oxides such as titanium oxide, magnesium oxide, zinc oxide, aluminum oxide, silicon oxide, nickel oxide, tin oxide, and neodymium oxide, mica, zeolite, kaolinite, copper-based compounds, Molybdenum compounds, copper/molybdenum composite oxides, copper/tungsten compounds, metal salts, and the like.

Examples of the copper-based compound include copper, copper oxide, copper halide, formic acid, citric acid, salicylic acid, lauric acid, oxalic acid, organic acid copper such as maleic acid, copper phosphate, and copper hydroxyphosphate. be done.

Examples of the molybdenum-based compounds include molybdenum, molybdenum dioxide, molybdenum trioxide, molybdenum chloride, and metal molybdates (metals: K, Zn, Ca, Ni, bismuth, Mg, etc.).

Examples of the metal salts include salts of acids such as sulfuric acid, nitric acid, oxalic acid and carbonic acid and metals such as barium, cobalt, magnesium, nickel and iron.

The content of the coloring aid in the white ink layer 22E is preferably 5% by mass or more and 65% by mass or less. When the content of the coloring agent is 5% by mass or more, the efficiency of color development can be further improved, and when the content is 65% by mass or less, a decrease in the strength of the white ink layer 22E can be suppressed. The lower limit of the content of the coloring aid is preferably 8% by mass or more, and the upper limit is preferably 45% by mass or less.

<Joining layer>
As the bonding layers 23 and 25, for example, an adhesive generally used in a known dry lamination method can be used. adhesives, ethylene copolymer adhesives, cellulose adhesives, polyester adhesives, polyamide adhesives, amino resin adhesives, epoxy adhesives, polyurethane adhesives, and the like can be used. A polyurethane adhesive is a cured product of a polyol compound and an isocyanate compound.

<Barrier layer>
The barrier layer 24 is a transparent or translucent resin layer having excellent gas barrier properties. Examples of the resin constituting the barrier layer 24 include polyethylene such as low-density polyethylene resin (LDPE) and high-density polyethylene resin (HDPE); polypropylene resin (PP); polyolefin resin such as polybutene; β-unsaturated carboxylic acid and its ester compound copolymer, ethylene-vinyl acetate copolymer (EVA), ethylene-vinyl alcohol (EVOH), nylon 6 film, nylon 66 film, nylon 12 film, nylon MXD6 film, C nylon Polyamide-based resins such as polyethylene terephthalate-based (modified) resins (PET, etc.), polybutylene terephthalate-based (modified) resins (PBT, etc.), vinylidene chloride-methyl acrylate copolymer (PVDC), polyacrylonitrile (PAN) There is In particular, MXD6 nylon (NY), which is a crystalline polyamide with oxygen barrier properties, is suitable. Here, nylon MXD6 film as a crystalline polyamide with oxygen barrier properties is a crystalline polyamide obtained from the polycondensation reaction of meta-xylenediamine (MXDA) and adipic acid, and is different from nylon 6, nylon 66, etc. In contrast, since it has an aromatic ring in its main chain, it has properties such as good gas barrier properties, strength, and good suitability for secondary processing. The barrier layer 24 is not limited to a single layer made of one of the above resins, and may be a multilayer film obtained by co-extrusion of two or more resins.

The film thickness of the barrier layer 24 is preferably 10 μm or more and 30 μm or less. If the film thickness of the barrier layer 24 is 10 μm or more, good gas barrier properties can be obtained, and if it is 30 μm or less, it can be used without increasing costs. As used herein, the term "barrier layer thickness" refers to the total thickness of all barrier layers when the barrier layer is a multilayer film. The film thickness of the barrier layer 24 can be measured by the same method as for the base material layer 21 . The lower limit of the film thickness of the barrier layer 24 is more preferably 12 μm or more, and the upper limit is more preferably 25 μm or less.

<Thermoplastic resin layer>
The thermoplastic resin layer 26 is for forming a peripheral edge seal portion by overlapping the surface film 13 and the back film 14 and heat-sealing the vicinity of the opposed peripheral edges. Therefore, in the surface film 13 and the back film 14, the thermoplastic resin layer 26 is located closest to the housing space, and the thermoplastic resin layers 26 are arranged so as to be in contact with each other. By applying heat and pressure while the surface film 13 and the like are arranged in this manner, the thermoplastic resin layers 26 can be heat-sealed to each other, so that the peripheral edge seal portion 15 can be formed.

Resins constituting the thermoplastic resin layer 26 include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-propylene block copolymer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene- A methacrylic acid copolymer, an ionomer resin, or the like can be used alone or in combination of two or more. The thermoplastic resin layer 26 may have a single layer structure or a multilayer structure.

When heat resistance is required for retort pouches, etc., the thermoplastic resin layer 26 is a non-stretched polypropylene layer (CPP layer) that mainly contains non-stretched polypropylene (CPP), or mainly contains linear low-density polyethylene (LLDPE). A linear low density polyethylene layer (LLDPE layer) is preferred.

The thickness of the thermoplastic resin layer 26 is preferably 3 μm or more and 100 μm or less. If the thickness of the thermoplastic resin layer 26 is 3 μm or more, it is excellent in impact resistance against dropping that may occur in the distribution process of the package 10, and if it is 100 μm or less, it is easy to fill the contents, and the contents are packed. It is also excellent in handleability such as ease of replacement. The thickness of the thermoplastic resin layer 26 can be measured by the same method as the thickness of the base material layer 21 . More preferably, the lower limit of the thickness of the thermoplastic resin layer 26 is 5 μm or more, and the upper limit is 80 μm or less.

It is preferable that the surface of the thermoplastic resin layer 26 facing the printed layer 22 is surface-treated from the viewpoint of improving adhesion. The surface treatment may be plasma treatment, corona discharge treatment, ozone treatment, low-temperature plasma treatment, or glow treatment, and any one of the primer layer, anchor coat layer, and undercoat layer may be used. It may be a surface treatment by forming.

<<<Manufacturing method of package with indication>>>
The labeled package 10 is obtained, for example, as follows. First, as shown in FIG. 3(A), a package 10A having no display 11 is prepared. However, since the contents are not enclosed in this state, the tops of the surface film 13 and the back film 14 are opened to accommodate the contents.

The ink layers 22A to 22D in the package 10A are formed by printing using an ink composition containing a coloring material and a binder resin. The white ink layer 22E is formed by printing using an ink composition containing a white pigment and a binder resin. In addition, the ink composition preferably contains a coloring agent for obtaining a clearer display and a coloring aid for improving coloring efficiency. When a color former is used, the ink composition is formed by mixing a white ink composition containing a white ink composition and a binder resin with a color forming ink composition containing a color former and a binder resin. may Also, the binder resin of the white ink composition may be a crystalline resin.

Next, as shown in FIG. 3(B), the package 10A is irradiated with a laser beam from the outer surface side of the package 10A to carbonize the components such as the binder resin of the white ink layer 22E. forming the display 11;

As laser light, YAG (yttrium (Y), aluminum (A), garnet (G)) laser light (wavelength 1064 nm)), YVO ₄ (yttrium vanadate) laser light (wavelength 1064 nm), fiber laser light (wavelength 1090 nm). , and/or CO ₂ laser (wavelength 10600 nm). These lasers have the property of transmitting through a transparent body, so that property can be used to suppress smoke and the like during display formation, and further to adjust the color density and the effect on the film. This makes it possible to form an extremely clear display 11 with little damage to the base material layer 21 . In addition, by irradiating these laser beams from the outer surface side of the package 10A, the components of the white ink layer 22E are gasified and carbonized at low output while minimizing damage to the base material layer 21. This allows the display 11 to be efficiently formed on the white ink layer 22 .

In the formation of the display 11, for example, a YVO ₄ laser machine (product name "MD-V9600", manufactured by Keyence Corporation) with an average output of 0.8 W or more and 5 W or less, more preferably 1.2 W or more and 2 W, Q switch frequency The pulse conditions are 10 kHz or more and 30 kHz or less, and a scan speed of 300 mm/s or more and 4000 mm/s, more preferably 1500 mm/s or more and 4000 mm/s. By forming the display 11 under these conditions, the display 11 can be formed at high speed without making holes in the base material layer 21, and a clear display 11 can be obtained.

Finally, the contents are accommodated in the package 10A, the upper seal portion 15C is formed, and the peripheral edge seal portion 15 is formed. As a result, the package 10 with the display shown in FIG. 1, in which the contents are enclosed, is obtained. In the above description, the display 11 is formed on the package 10A immediately before the contents are enclosed in the package 10A, but the display 11 may be formed immediately after the contents are enclosed in the package 10A.

According to the present embodiment, the white ink layer 22E is irradiated with a laser beam to form the entire display 11 from the carbide of the constituents of the white ink layer 22E. It is possible to form the indicia 11 even immediately before or after encapsulating the .

According to this embodiment, in order to form the package 10 with the indication, it is sufficient to stock the package 10A. The package 10A can be used for products of different types. As a result, waste can be eliminated and cost can be reduced.

According to the present embodiment, since the display 11 is formed of the carbide of the constituent of the white ink layer 22E located inside the base layer 21, the display 11 can be erased by processing such as retort processing, for example. Hateful.

In addition, when the white ink layer 22E contains a color former and a binder resin having at least one endothermic peak in an endothermic curve during temperature rise measured with a differential scanning calorimeter (DSC), the average output of laser light is set low, or the scan speed is set fast, a clear display 11, such as thick and clear characters, can be formed. Thereby, the damage of the base material layer 21 by the laser beam can be reduced.

[Second embodiment]
A package with a display according to a second embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a plan view of a package with a label according to this embodiment, and FIG. 5 is a cross-sectional view of a laminate constituting the package with a label of FIG. In FIG. 5, members denoted by the same reference numerals as those in FIG. 2 are the same as those shown in FIG. 2, so description thereof will be omitted.

<<<Indicated packaging>>>
A package 30 with a display (hereinafter sometimes simply referred to as "package 30") shown in FIG. 4 is a lid member. The packaging body 30, which is a lid material, is a cup-shaped packaging container, especially instant foods such as cup noodles and cup fried noodles that are processed by pouring boiling water into them, foods that are heated in a microwave oven and other instant foods, and heated beverages. , microwave oven-heatable beverages, snacks, sweets, jellies, and the like.

Like the package 10, the package 30 also has a display 31 visible from the outside. The indicia 31 contain product information, and the indicia 31 are all composed of carbides of the constituents of the white ink layer 22E. Moreover, the package 30 is composed of a laminate 40 shown in FIG.

<<Display>>
The display 31 may have a hollow portion 31A and two or less filled portions 31B. Since the display 31 is similar to the display 11, description thereof will be omitted here.

<<Laminate>>
The laminate 40 includes a substrate layer 21, a printed layer 22, a bonding layer 23, a barrier layer 24, a bonding layer 25, a substrate layer 41, a bonding layer 42, and a thermoplastic resin layer 26 in this order from the outside of the package 30. Prepare. However, the laminate 40 only needs to include the substrate layer 21 and the printed layer 22, and does not have to include at least one of the bonding layers 23, 25, 42, the substrate layer 41, and the thermoplastic resin layer 26. . Moreover, since the base material layer 41 is the same as the base material layer 21, description is omitted here.

<<<Manufacturing method of package with indication>>>
The labeled package 30 is obtained, for example, as follows. First, a package on which the display 31 is not formed is prepared. Next, this package is irradiated with a laser beam from the outer surface side of the package to carbonize the components of the white ink layer 22E and form the display 31 on the package. Thereby, the package 30 is obtained.

In this embodiment also, the white ink layer 22E is irradiated with a laser beam to form the entire display 31 from the carbide of the constituents of the white ink layer 22E. It is possible to form the indicia 31 even immediately before or after.

[Third Embodiment]
A package with a display according to a third embodiment of the present invention will be described below with reference to the drawings. FIG. 6 is a plan view of a package with a label according to this embodiment, and FIG. 7 is a cross-sectional view of a laminate constituting the package with a label of FIG. In FIG. 7, members denoted by the same reference numerals as those in FIG. 2 are the same as those shown in FIG. 2, so description thereof will be omitted.

<<<Indicated packaging>>>
A package 50 with an indication shown in FIG. 6 (hereinafter sometimes simply referred to as "package 50") is a tube container. The package 50 has an accommodation space (not shown) for accommodating contents. Examples of internal objects include toothpaste, cosmetics, glue, mustard paste, wasabi paste, cream, paint, cartilage, pharmaceuticals, and the like.

Like the package 10, the package 50 also has a display 51 visible from the outside. The indicia 51 contain product information, and the indicia 51 are all composed of carbides of the constituents of the white ink layer 22E.

<<Display>>
The display 51 is formed on a cylindrical body portion 54, which will be described later. The display 51 may have a hollow portion 51A and two or less filled portions 51B. Since the display 51 is similar to the display 11, description thereof will be omitted here.

A package 50 that is a tube container includes a head portion 53 and a cylindrical body portion 54 . The head portion 53 consists of a hollow conical shoulder portion 53A and an outlet portion 53B, which are integrally formed. A cap corresponding to the shape of the outlet portion 53B may be attached to the outlet portion 53B. The cylindrical body portion 54 is connected to the shoulder portion 53A of the head portion 53 . The tubular body 54 is constructed from a laminate 60 shown in FIG.

<<Laminate>>
The laminate 60 includes a thermoplastic resin layer 61 which is an outer thermoplastic resin layer, a bonding layer 62, a base layer 21, a printing layer 22, a bonding layer 23, a barrier layer 24, a bonding layer 25, and an inner thermoplastic resin layer. The thermoplastic resin layers 26 are provided in this order from the outside of the package 50 . However, the laminate 60 only needs to include the base material layer 21 and the print layer 22, and does not have to include at least one of the bonding layers 23, 25, 62, the barrier layer 24, and the thermoplastic resin layers 26, 61. . Further, the thermoplastic resin layer 61 is the same as the thermoplastic resin layer 26, so description thereof will be omitted here.

<<<Manufacturing method of package with indication>>>
The labeled package 50 is obtained, for example, as follows. First, a package on which the display 51 is not formed is prepared. Next, this package is irradiated with a laser beam from the outer surface side of the package to carbonize the components of the white ink layer 22E and form the display 51 on the package. Thereby, the package 50 is obtained.

In the present embodiment, the white ink layer 22E is also irradiated with a laser beam to form the entire display 51 from the carbide of the constituents of the white ink layer 22E. It is possible to form the indicia 51 even immediately before or after.

[Fourth Embodiment]
A package with a display according to a fourth embodiment of the present invention will be described below with reference to the drawings. FIG. 8 is a perspective view of a package with an indication according to this embodiment, and FIG. 9 is a cross-sectional view of a laminate constituting the package with an indication of FIG. In FIG. 9, the members denoted by the same reference numerals as those in FIG. 2 are the same as the members shown in FIG. 2, so the description thereof will be omitted.

<<<Indicated packaging>>>
A package 70 with an indication shown in FIG. 8 (hereinafter sometimes simply referred to as "package 70") is a paper container for liquid. The packaging body 70 has an accommodation space (not shown) for accommodating contents. Examples of internal substances include alcohols such as sake, shochu, and wine, dairy drinks such as milk, foods such as orange juice and tea, and liquids such as chemical products such as car wax, shampoo, and detergent. be done.

The package 70 can be manufactured by a conventionally known method using the laminate 80 to be described later. good.

Like the package 10, the package 70 also has a display 71 visible from the outside. Indicia 71 contain product information, and indicia 71 are all composed of carbides of the constituents of white ink layer 22E.

<<Display>>
The display 71 is formed on a body portion 73 or the like, which will be described later. The display 71 may have a hollow portion 71A and two or less filled portions 71B. Since the display 71 is similar to the display 11, description thereof will be omitted here.

The packaging body 70 has a square tube-shaped body portion 73 including side surfaces, a square plate-shaped bottom portion 74 , and an upper portion 75 . The upper portion 75 has a pair of opposing inclined plates 75A and a pair of folding portions 75B positioned between the inclined plates 75A and folded between the inclined plates 75A. Also, the pair of inclined plates 75A are provided with an overlap margin 76 at their upper ends, and the pair of inclined plates 75A are joined to each other by the overlap margins 76 provided at their respective upper ends. It should be noted that one of the pair of inclined plates 75A may be attached with a spout and the spout may be sealed with a cap. The body portion 73 is composed of a laminate 80 shown in FIG.

<<Laminate>>
A laminate 80 shown in FIG. 9 includes a thermoplastic resin layer 81, which is an outer thermoplastic resin layer, a bonding layer 82, a printing layer 22, a base layer 83, a bonding layer 23, a barrier layer 24, a bonding layer 25, and an inner heat layer. A thermoplastic resin layer 26, which is a plastic resin layer, is provided in this order from the outside of the package 70. As shown in FIG. However, the laminate 80 only needs to include the base material layer 83 and the printed layer 22, and does not need to include at least one of the bonding layers 23, 25, 82, the barrier layer 24, and the thermoplastic resin layers 26, 81. . Further, the thermoplastic resin layer 81 is the same as the thermoplastic resin layer 26, so description thereof will be omitted here.

The base material layer 83 is made of paper. Any paper can be used as the base material layer 83 depending on the desired rigidity. Known papers such as label paper, cup base paper, card paper, ivory paper, paper board such as manila board, milk carton base paper, cup base paper, synthetic paper and clay coated paper can be used.

The base material layer 83 may be surface-treated from the viewpoint of enhancing the adhesion like the base material layer 21 . Examples of surface treatment include corona discharge treatment and flame treatment. The flame treatment can be carried out by using a known flame treatment device to heat the surface of the substrate 83 layer.

<<<Manufacturing method of package with indication>>>
The labeled package 70 is obtained, for example, as follows. First, a package on which the display 71 is not formed is prepared. Next, this package is irradiated with a laser beam from the outer surface side of the package to carbonize the components of the white ink layer 22E and form the display 71 on the package. Thereby, the package 70 is obtained.

In this embodiment also, the white ink layer 22E is irradiated with a laser beam to form the entire display 71 from the carbide of the constituents of the white ink layer 22E. It is possible to form indicia 71 even immediately before or after.

[Fifth embodiment]
A package with a display according to a fifth embodiment of the present invention will be described below with reference to the drawings. FIG. 10 is a perspective view of a package with an indication according to this embodiment, and FIG. 11 is a cross-sectional view of a laminate constituting the package with an indication of FIG. In FIG. 11, members denoted by the same reference numerals as those in FIG. 2 are the same as those shown in FIG. 2, so description thereof will be omitted.

<<<Indicated packaging>>>
A package 90 with a display (hereinafter sometimes simply referred to as "package 90") shown in FIG. 10 is a paper cup. The package 90 has an accommodation space 90A for accommodating contents. Examples of the internal substance include alcohols such as sake, shochu and wine, dairy drinks such as milk, and foods such as soft drinks such as orange juice and tea.

Like the package 10, the package 90 also has a display 91 visible from the outside. The indicia 91 contain product information, and the indicia 91 are all composed of carbides of the constituents of the white ink layer 22E.

<<Display>>
The display 91 is formed on a body portion 93 which will be described later. The display 91 may have a hollow portion 91A and two or less filled portions 91B. Since the display 91 is similar to the display 11, description thereof will be omitted here.

The package 90 has a flange portion 93A at the top, a cylindrical body portion 93 whose diameter gradually widens toward the opening, and a bottom portion 94 provided at the lower end (one end) of the body portion 93. ing. The trunk portion 93 has a flange portion 93A whose upper end is rounded outward. A cover member may be attached to the package 90 along the flange portion 93A of the body portion 93 after the contents are stored. The lid material preferably has gas barrier properties, and conventionally known gas barrier properties can also be used. The trunk portion 93 is composed of the laminate 80 described in the fourth embodiment.

<<<Manufacturing method of package with indication>>>
The labeled package 90 is obtained, for example, as follows. First, a package on which the display 91 is not formed is prepared. Next, this package is irradiated with a laser beam from the outer surface side of the package to carbonize the components of the white ink layer 22E and form the display 91 on the package. Thereby, the package 90 is obtained.

In this embodiment also, the white ink layer 22E is irradiated with a laser beam to form the entire display 91 from the carbide of the constituents of the white ink layer 22E. It is possible to form the indicia 91 even immediately before or after.

[Reference example]
The advantages of using a white ink layer containing a white pigment, a binder resin containing a crystalline resin, and a color former as the white ink layer will be described below with reference to reference examples.

<White ink composition>
A white ink composition was obtained by blending each component so as to have the composition shown below. As the mixed solvent for the white ink compositions 1 and 2, which will be described later, methyl ethyl ketone: n-propyl acetate: isopropyl alcohol = 3:5:2 (mass ratio) was used.

(White ink composition A)
・Titanium oxide: 40% by mass
・Crystalline urethane acrylate: 10% by mass
・ Mixed solvent: 50% by mass

(White ink composition B)
・Titanium oxide: 40% by mass
・Amorphous urethane acrylate: 10% by mass
・ Mixed solvent: 50% by mass

White ink composition 1 shows two endothermic peaks (measured values: 60.4°C and 74.7°C) between 55°C and 80°C in the DSC endothermic curve. 0.85 mJ/mg and 0.77 mJ/mg. A graph of the DSC endothermic curve of white ink composition A is shown in FIG. On the other hand, in the DSC endothermic curve of white ink composition 2, only a gentle curve due to the glass transition of the amorphous resin was observed, and no endothermic peak was observed. A graph of the DSC endothermic curve of white ink composition B is shown in FIG.

<Color ink composition>
Each component was blended so as to have the composition shown below to obtain a color ink composition. Methyl ethyl ketone: n-propyl acetate: isopropyl alcohol = 3:5:2 (mass ratio) was used as the mixed solvent of the color ink compositions 1 and 2, which will be described later.
(Color-forming ink composition A)
・Urethane resin: 15% by mass
・Bismuth oxide: 5% by mass
・Titanium oxide: 20% by mass
・ Mixed solvent: 50% by mass

(Color-forming ink composition B)
・Urethane resin: 15% by mass
・Antimony-doped tin oxide: 10% by mass
・Titanium oxide: 15% by mass
・ Mixed solvent: 60% by mass

<Reference example 1>
On one side of a substrate layer made of a biaxially oriented polypropylene film having a thickness of 20 μm, a gravure printing machine was used to apply 95 parts by mass of white ink composition A, 5 parts by mass of color ink composition A, and cure. An ink composition 1 mixed with 3 parts by mass of an isocyanate-based cured product as an agent was applied and dried to form a white ink layer having a thickness of 1.5 μm. Next, the white ink composition A was applied to the surface of the white ink layer and dried to form a base layer having a thickness of 1.5 μm. Then, a thermoplastic resin layer having a thickness of 13 μm is formed on the base layer by extrusion coating of polypropylene resin, thereby providing a substrate layer, a white ink layer, a base layer, and a thermoplastic resin layer in this order. A laminate was obtained.

<Reference example 2>
In Reference Example 2, ink composition 2 was used in which 95 parts by mass of white ink composition A was mixed with 5 parts by mass of color ink composition A, and a two-pack curable urethane adhesive (coating In the same manner as in Reference Example 1, except that a thermoplastic resin layer made of an unstretched polypropylene film having a thickness of 30 μm was dry-laminated via an amount of 3 g/m ² (dry)), a base layer and a white ink layer. , a base layer, an adhesive, and a thermoplastic resin layer in this order.

<Reference example 3>
In Reference Example 3, a laminate was obtained in the same manner as in Reference Example 2, except that ink composition 1 was used instead of ink composition 2.

<Reference example 4>
In Reference Example 4, instead of ink composition 1, 95 parts by mass of white ink composition A was mixed with 5 parts by mass of color ink composition B and 3 parts by mass of an isocyanate-based cured product as a curing agent. A laminate was obtained in the same manner as in Reference Example 1, except that ink composition 3 was used.

<Reference example 5>
In Reference Example 5, instead of Ink Composition 2, Ink Composition 4 in which 95 parts by mass of White Ink Composition A and 5 parts by mass of Color Forming Ink Composition B were mixed was used. A laminate was obtained in the same manner as in 2.

<Reference example 6>
In Reference Example 6, a laminate was obtained in the same manner as in Reference Example 2, except that ink composition 3 was used instead of ink composition 2.

<Reference example 7>
In Reference Example 7, instead of ink composition 1, 80 parts by mass of white ink composition A was mixed with 20 parts by mass of color ink composition B and 3 parts by mass of an isocyanate-based cured product as a curing agent. A laminate was obtained in the same manner as in Reference Example 1, except that ink composition 5 was used.

<Reference example 8>
In Reference Example 8, instead of ink composition 2, ink composition 6 in which 80 parts by mass of white ink composition A was mixed with 20 parts by mass of color ink composition B was used. A laminate was obtained in the same manner as in 2.

<Reference example 9>
In Reference Example 9, a laminate was obtained in the same manner as in Reference Example 2, except that ink composition 5 was used instead of ink composition 2.

<Reference Example 10>
In Reference Example 10, instead of ink composition 1, 95 parts by mass of white ink composition B was mixed with 5 parts by mass of color ink composition A and 3 parts by mass of an isocyanate-based cured product as a curing agent. A laminate was obtained in the same manner as in Reference Example 1, except that ink composition 7 was used.

<Reference Example 11>
In Reference Example 11, instead of Ink Composition 2, Ink Composition 8, in which 95 parts by mass of White Ink Composition B and 5 parts by mass of Color Forming Ink Composition A were mixed, was used. A laminate was obtained in the same manner as in 2.

<Reference Example 12>
In Reference Example 12, a laminate was obtained in the same manner as in Reference Example 3, except that ink composition 7 was used instead of ink composition 1.

<Laminate strength>
In the laminates according to Reference Examples 1 to 12, the lamination strength between the substrate layer and the white ink layer was measured. Laminate strength is measured by using a measurement sample cut out from the laminate to a width of 15 mm, and using a Tensilon tensile tester at a tensile speed of 50 mm / min in accordance with JIS K6854-1: 1999. The print layer is removed from the base layer. It was measured by peeling in the direction of 90 degrees. The laminate strength was the arithmetic mean value of the values obtained by measuring 5 times.

<Visibility of printed lines>
For the laminates according to Reference Examples 1 to 12, using a fiber laser machine (model number "LP-Z250", manufactured by Panasonic Industrial Devices SUNX Co., Ltd.), under the conditions of a scan speed of 2000 mm / min and a print pulse period of 40 μs, the base material A laser beam (wavelength: 1060 nm, laser power: 30% and 60%) was irradiated from the layer side to form printed lines on the laminate. The printed line thus obtained was evaluated for colored line width and colored density. The evaluation criteria were as follows.
A: The colored line width exceeded 0.5 mm, the print color was dark, and the visibility was excellent.
◯: The colored line width was 0.1 mm or more and 0.5 mm or less, the printed color was dark, and the visibility was good.
x: The colored line width was less than 0.1 mm, the printed color was light, and the visibility was poor.

The results are shown in Table 1 below.

As shown in Table 1, the laminates according to Reference Examples 10 to 12 have a low print density and a narrow line width at both the power of 30% and 60%, so sufficient visibility cannot be obtained. rice field. On the other hand, in the laminates according to Reference Examples 1 to 9, a dark and clear display was formed only by irradiating a low-energy laser beam with a power of 30%. In addition, since the lamination strength was sufficiently high, neither lifting of each layer nor delamination was observed in the printed area and its surroundings. In addition, the laminates according to Reference Examples 1 to 9 maintained a beautiful appearance without floating of each layer or delamination even when irradiated with a high-energy laser beam with a power of 60%.

10, 30, 50, 70, 90 Packages 11, 31, 51, 71, 91 Indications 11B, 31A, 51A, 71A, 91A Hollow portions 11C, 31B, 51B, 71B, 91B Filled portions 21, 83... Base material layer 22... Printed layer 22E... White ink layer

Claims (10)

A method for manufacturing a package with a display having a display including product information visible from the outer surface,
preparing a package comprising a substrate layer and a printed layer including at least a white ink layer;
A step of irradiating the package with a laser beam to carbonize the components of the white ink layer to form all the indications on the package;
the display includes a barcode, the height of the barcode is 25 mm or less ;
The white ink layer contains a binder resin having at least one endothermic peak in an endothermic curve during temperature rise measured with a differential scanning calorimeter,
The base material layer is an oriented polypropylene film,
A method for manufacturing a package with a display, wherein the printed layer has a lamination strength of 0.5 N/15 mm or more with respect to the base material layer . 2. The method for manufacturing a package with a display according to claim 1, further comprising the step of enclosing contents in said package. A package with a display, comprising a substrate layer and a printed layer, and having a display containing product information visible from the outer surface,
The printing layer includes at least a white ink layer,
all of the indications on the package are composed of carbides of the constituents of the white ink layer,
the display includes a barcode, the height of the barcode is 25 mm or less ;
The white ink layer contains a binder resin having at least one endothermic peak in an endothermic curve during temperature rise measured with a differential scanning calorimeter,
The base material layer is an oriented polypropylene film,
A package with a display, wherein the printed layer has a lamination strength of 0.5 N/15 mm or more with respect to the base layer . 4. The indicia-attached package according to claim 3, wherein the indicia have hollow portions. 5. The labeled package according to claim 3 or 4, wherein the indicator has two or less solid-filled portions. Claims 3 to 5, wherein the display further includes at least one of the name, raw material name, expiration date, expiration date, content amount, nutrition ingredient display, storage method, usage method, heating time, and manufacturer information . A package with a label according to any one of the items. The package comprises a laminate comprising the substrate layer, the printed layer, and the thermoplastic resin layer in this order from the outside, or the outer thermoplastic resin layer, the printed layer, the substrate layer, and the inner thermoplastic resin layer, which are arranged from the outside. 7. The package with an indication according to any one of claims 3 to 6, which is composed of laminated bodies provided in sequence. The labeled package according to any one of Claims 3 to 7, wherein the package is a pouch, lid, or tube container . The labeled package according to claim 8, wherein the pouch is a retort pouch. 10. The labeled package according to any one of claims 3 to 9, wherein a content is enclosed in the labeled package.

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