WO2008004667A1

WO2008004667A1 - Process for manufacturing packaging bag, and packaging system

Info

Publication number: WO2008004667A1
Application number: PCT/JP2007/063584
Authority: WO
Inventors: Yukio Nakagawa; Yoshio Iwasaki
Original assignee: Ishida Co., Ltd.
Priority date: 2006-07-06
Filing date: 2007-07-06
Publication date: 2008-01-10
Also published as: JPWO2008004667A1

Abstract

A process for manufacturing a packaging bag through printing and bag-making operations sequentially performed, characterized by including the printing step of while unwinding (15) a plain laminate film furnished with a base material layer, a vapor deposition layer and a sealant layer, feeding the same to inkjet printer (17), then spraying an ultraviolet hardening ink composition through the head of the printer to thereby print a desired design involving merchandise information and pattern on a given surface of the base material layer of the laminate film, and thereafter carrying out ultraviolet irradiation (18) to thereby harden the ultraviolet hardening ink composition; and the subsequent bag-making step of feeding the printed laminate film to bag making and packaging machine (10) by which while forming (13) the laminate film into a tube, the lengthwise both end faces of the laminate film are longitudinally sealed and by which perpendicularly to the lengthwise direction of the laminate film, lateral sealing at given intervals is carried out to thereby accomplish bag-making.

Description

Specification

Packaging bag manufacturing method and packaging system

Technical field

[0001] The present invention includes a method for manufacturing a packaging bag capable of filling and packaging a product while forming the film sack while printing on a plain film, and a printing function used in the manufacturing method. The packaging system.

Background art

[0002] Commercial packaging bags typified by food packaging bags such as snacks are printed on the exterior to explain the contents of the items in the bags and to appeal the products. Usually. The printed laminated film was supplied to a packaging machine, filled in with a product while being formed into a bag shape, and formed into a packaging bag. The printed laminated film used in the manufacture of such a packaging bag is a laminated film in which a base film having mechanical properties of a film and a low melting point polymer film having heat sealing properties are laminated. In addition, the base material layer film is configured by laminating a base material layer film having a printing surface and a base material layer film having a vapor deposition surface so as to have a printing surface and a vapor deposition surface. In order to manufacture a laminated film that can be produced, many processes are required, such as vapor deposition on a base layer film, printing on a base layer film, and lamination of a base layer film and a low melting point film. For this reason, printing on a laminated film is usually performed in advance by a gravure printing method in a separate process prior to the packaging bag manufacturing process in which the laminated film is formed into a packaging bag. .

However, the content printed on the laminated film (product advertising pattern 'promotional text to encourage purchase' 'product information') varies depending on the product, and the brand of the laminated film must be changed every time the packaged product is changed. The work efficiency in the packaging bag manufacturing process must be improved. In particular, in recent years, there has been a strong demand for a design change in a short period of time, so small lots of the same design are progressing, and this problem is becoming important.

[0003] By the way, there has been known a packaging machine that incorporates a printing device that prints a bag manufacturing date and a packaging lot differently for each individual laminated film in the packaging bag manufacturing process. (For example, Patent Document 1).

Patent Document 1: JP-A-10-181721

[0004] However, since the printing in the conventional packaging bag manufacturing process represented by the packaging machine described in Patent Document 1 performs printing with a thermal head or a thermal transfer ribbon, the design has already been designed. However, limited additional information was printed on the packaging material.

Therefore, if a plain laminated film that is not a printed film is supplied to the packaging machine, and the packaging bag manufacturing process can not only print, but also print the design on the laminated film and wrap the product with the packaging machine, The process can be simplified, and it is possible to effectively deal with design changes in small lots.

Disclosure of the invention

Problems to be solved by the invention

[0005] Accordingly, an object of the present invention is to provide a method for manufacturing a packaging bag that can package an article while printing on a plain film in the packaging bag manufacturing process, and to the manufacturing method. The packaging system with the printing function to use ^ iij out.

Furthermore, in order to form a packaging system having such a printing function, high-speed and clear printing is possible, and the printing layer is formed with a high printing surface durability.

Means for solving the problem

[0006] In order to solve the above problems, in the present invention, printing is performed by an inkjet method, and a printing process in which a laminated film is not taken up and a bag making process are performed in a series of steps. The most important feature is the manufacturing method and packaging system of packaging bags that can be used.

[0007] As a specific method for producing a packaging bag of the present invention,

While winding a plain laminated film having a base material layer, a vapor deposition layer and a sealant layer, it is supplied to an inkjet printer,

From the head of the printer, an ultraviolet curable ink composition is jetted, and a desired design including product information and a pattern is printed on a predetermined surface of the laminated film base layer. Printing process for curing the ultraviolet curable ink composition Thereafter, the laminated film on which the printing has been performed is supplied to a bag-making packaging machine, and the laminated film is formed into a cylindrical shape, while both longitudinal ends of the laminated film are vertically sealed, and then the laminated film is formed. The main feature is that it includes a bag-making process in which a bag is made by performing transverse sealing at a predetermined interval perpendicular to the length direction of the film.

It is preferable that the manufacturing method of the said packaging bag comprises the following elements further.

It is preferable that the printing is performed on the laminated film in a state where the plane is maintained.

In the printing, it is preferable that printing is not performed on the surface of the base material layer on which the longitudinal seal of the laminated film is applied! /.

Using the laminated film including a base material layer having a surface subjected to mat treatment, corona treatment, plasma treatment, flame treatment, or EB gun treatment, the printing is performed using the treated surface as a printing surface. U prefer that.

Materials with a surface wetting index of less than 38 dynes Zcm are matte, corona treated, plasma treated, flame treated, or EB gun treated to provide a surface with a wetting index of 38 dynes Zcm or higher. It is preferable that the printing is performed by using the treated surface as the printing surface, using the laminated film including the base material layer.

It is preferable that the printing is performed by using the laminated film having an ink receiving layer formed on the surface of the base material layer, and the printing is performed using the ink receiving layer as a printing surface. More preferably, it is formed from a thermoplastic polymer binder.

It is preferable that the ultraviolet curable ink composition contains a colorant, a surfactant, an ultraviolet curable diluent, and a photoinitiator. The ultraviolet curable diluent is a mono- or polyfunctional alkyl. More preferred are (meth) acrylate, glycol (meth) acrylate or alkoxylated glycol (meth) acrylate. Alternatively, it is preferable that the ultraviolet curable diluent contains a prepolymer, and the prepolymer is a polyester (meth) acrylate, an epoxy (meth) acrylate, or a polyurethane (meth) acrylate. Further preferred.

The printing design includes the eye mark printing on the laminated film and the merchandise to be packaged. It is preferable to include at least one of the deadline information related to the product.

After the laminated film is printed, it is preferable that a top coat layer is further formed on the printed surface of the laminated film.

[0009] As a specific packaging system of the present invention,

(a) a film unwinding roller for unwinding the laminated film,

(b) a printing apparatus comprising an inkjet head and an ultraviolet irradiation lamp for printing on a laminated film;

(c) a former for forming a laminated film into a cylindrical shape,

(d) a longitudinal sealing device for sealing both end surfaces in the length direction of the cylindrical laminated film;

(e) a transverse seal 'cutting device for cutting transverse seals at predetermined intervals in a direction perpendicular to the longitudinal direction of the cylindrical laminated film;

(f) a film storage device comprising a fixed roll and a moving roll for storing a predetermined length of laminated film placed between the printing device (b) and the former (c); and

(g) The main feature is that a control device for controlling the printing device (b), the vertical sealing device (d) and the horizontal sealing device (e) according to printing conditions and packaging conditions is provided. And

[0010] It is preferable that the packaging system further includes the following elements.

Printing by the printing device (b) is performed with the laminated film stopped,

The vertical sealing, the horizontal sealing, and the cutting by the vertical sealing device (d) and the horizontal sealing device (e) are preferably performed while a cylindrical laminated film is continuously supplied. While the unwinding roller (a) force continuously unwinds the laminated film, the second film storage device (h) for performing printing by the printing device (b) in a stopped state of the laminated film includes the unwinding roller (a) force. Preferably, it is provided between the take-out roller (a) and the printing device (b). The printing apparatus (b) performs printing in a state in which the laminated film maintains a flat surface, and further, a mechanism for moving the inkjet head in the moving direction of the film, under the ink jet head, the laminated film It is preferable to have a support plate to support, and a suction device provided in the support plate. The inkjet head has at least a pattern and product information on the laminated film.

V, the inkjet head A which preferably includes the inkjet head A for printing the deviation and the inkjet head B for printing at least one of the eye mark and the expiration date information on the packaged product. Is composed of a plurality of heads arranged in a direction orthogonal to the traveling direction of the laminated film so that wide printing can be performed on the laminated film.

More preferably, the inkjet head B is arranged so as to print at one position in the direction orthogonal to the direction of travel of the laminated film. Further, it is more preferable that the irradiation lamp also has the power of the ultraviolet lamp A that irradiates the printing surface printed by the inkjet head A and the ultraviolet lamp B that irradiates the printing surface printed by the inkjet head B.

Alternatively, the inkjet head includes a plurality of arrays arranged in a direction orthogonal to the laminating film traveling direction so that at least one of a pattern and product information can be printed on the laminating film in a wide width. It is preferable that at least one of the plurality of ink-jet heads is printed with at least one of the eye mark and the expiration date information on the packaged product.

The control device (g), which preferably provides a sensor for detecting the eye mark between the printing device and the former, prints the laminated film according to the detection signal of the sensor force. In addition, it is more preferable to control the vertical sealing device (d) so as to perform vertical sealing at a location.

The unwinding roller (a) force is supplied to the film storage device (f) while the supplied laminated film is stopped and printing is performed on the laminated film surface by the printing device (b). It is preferable that control is performed by the control device (g) so that the laminated film is supplied to the former (c).

It is preferable that a top coat processing device (i) for performing a top coat is further incorporated on the printing surface of the laminated film printed by the printing device (b).

The invention's effect

According to the manufacturing method and the packaging system of the packaging bag of the present invention, the plain laminated film is Using a packaging machine with a built-in function that can perform printing including images, product information, and eye marks for product image formation, the printing process and bag making process are performed in a series of processes. Therefore, after the printing process is completed, there is no hassle of winding up the laminated film that has been printed.

As a result, it is possible to perform packaging while changing the contents of printing in accordance with changes in the items to be packaged, changes in the amount of items to be filled, and changes in the size of the bag. Compared with the process of packaging while changing the brand when changing the brand, a system with diversity can be obtained.

Brief Description of Drawings

FIG. 1 is a schematic cross-sectional view showing the configuration of a packaging bag produced by the method of the present invention.

FIG. 2 is a schematic cross-sectional view showing a configuration different from FIG.

FIG. 3 is a schematic view showing an embodiment for explaining a printing method by the packaging system of the present invention.

FIG. 4 is a schematic view of a general vertical bag making and packaging machine used for manufacturing packaging bags.

Explanation of symbols

1 Sealant layer

2 Barrier layer

3 Adhesive layer

4 Base material layer

5 Ink receiving layer

10 Bag making and packaging machine

11 Vertical seal device

12 Horizontal seal 'cutting device

13 Former

14 Pull-down mechanism

15 Roller roller

16 Guide roller

17 Printing machine equipment

18 UV irradiation equipment 19 coating roller

20 sensors

21 Control unit

22 Support plate

23, 23 'movable roller

24, 24 'fixed roller

B Packaging bag

C goods

F Laminated film

BEST MODE FOR CARRYING OUT THE INVENTION

[0014] The packaging bag manufacturing method and the packaging system of the present invention are a series of processes including a printing process in which a printing process is incorporated in a bag-making process and a bag-making process. Therefore, the laminated film is supplied to the bag making process as it is without being wound after the printing process.

As described above, in order to make the printing process and the bag making process a series of processes, it is very difficult to adopt the gravure printing method, so the inkjet printing method is adopted in the present invention. However, printing that replaces gravure printing, which constitutes the packaging bag design itself, rather than simple text information printing, is applied to the laminated film that is the raw material of packaging bags that require airtightness. Even if applied, there are many problems, such as peeling off prints with poor ink fixability, such as laminated film strength ink, and poor clarity with poor color development. Therefore, in the present invention, a manufacturing method and a packaging system of a packaging bag printed by the ink jet printing method, in which the above-mentioned problems are suppressed by devising the laminated film to be used and the procedure of the printing process, are presented.

[0015] (Laminated film)

In the manufacturing method and the packaging system of the packaging bag of the present invention, a film having a plain surface (base material layer) is used as the laminated film for packaging (F). That is, the manufacturing method and the packaging system of the packaging bag of the present invention are the manufacturing process of the packaging bag that is not included in the packaging system for additionally printing the bag manufacturing date or the packaging lot on the already printed packaging film. Among them, a system capable of printing on the plain laminated film (F) up to the design of the packaging bag. System.

In the present invention, since a plain base material layer film and a sealant layer film are laminated to form a laminated film, a separate process for pre-printing is not required, and the laminated film is laminated. The film manufacturing process is simplified.

[0016] (Base material layer)

Since the base material layer (4) is the main body forming the bag, it is required to have an appropriate hardness with high tensile strength, heat resistance to withstand heat sealing during bag formation, and low. Since it must be costly, biaxially oriented polypropylene film (OPP), biaxially oriented polyester film, biaxially oriented polyamide or the like is used.

If heat sealability is also required on the outer surface of the bag, the ability to form a further sealant layer on the outer surface of the base material layer, heat-sealable biaxially stretched polypropylene film (OPH), heat-sealable biaxially stretched polyethylene A terephthalate film is used. The thickness of the base material layer is preferably 10 to 100 111, more preferably 15 to 50 / ζ πι. Further, instead of the material of the base material layer, or paper such as thin paper having a specific gravity of 30 to L00 g / m ² is preferably used as the base material layer (4). it can.

[0017] (Sealant layer)

The sealant layer (1) is preferably a low melting point polymer that melts at a low temperature of 160 ° C. or lower, preferably 120 ° C. or lower. Such polymers generally include linear low density polyethylene (LLDPE), ethylene 'propylene copolymers, copolymers of ethylene and Z or propylene with other olefin monomers (butene, pentene, etc.), For example, ethylene acetate bur resin is used. Of these, low-density polyethylene such as linear low-density polyethylene (mLLDPE) polymerized with a meta-cene catalyst can be suitably used. In addition to the above materials, heat sealable biaxially oriented polypropylene (OPH) can also be used.

When unstretched polypropylene and heat-sealable biaxially-stretched polypropylene are used, the heat-sealable layer has a copolymer of propylene and other olefins (ethylene, butene, etc.) so that it can be melted at a low melting point. Low-density polyethylene (such as linear low-density polyethylene polymerized with a meta-octane catalyst), a layer containing ethylene acetate butyl copolymer It is preferable to form.

The polyethylene constituting the sealant layer (1) may be a single layer or a multilayer. Examples of the multilayer include a coextruded product of the above linear low density polyethylene layer and low density polyethylene or high density polyethylene. The sealant layer may be formed of a low-melting-point polyester that is composed only of polyolefin as described above. Examples of the low melting point polyester include a copolymerized polyester of ethylene terephthalate and cyclohexanediol manufactured by Eastman Kodak Company.

The thickness of the sealant layer is preferably 10 to 80 m force S, more preferably 20 to 50 m force S.

[0018] (Barrier layer)

The noria layer (3) is a layer that protects the internal food against water and oxygen, and is a metal such as aluminum, iron, or magnesium, or an acid such as acid aluminum or acid cage. It is preferable to form by vapor deposition of ceramic or the like. A preferable thickness of the barrier layer (3) is preferably 300 to 1500A. In addition, the barrier layer may be formed of an ethylene butyl alcohol film, a film containing reduced iron or cobalt instead of the vapor deposition layer or in combination with the vapor deposition layer! /.

[0019] (Laminated)

First, the barrier layer (3) is formed on one surface of the sealant layer (2) or the base material layer (4) by a method such as vapor deposition. Note that a barrier layer (3) may be provided on one side of each of the sealant layer (2) and the base material layer (4).

Next, when a film including the sealant layer (2) and a film including the base material layer (4) are laminated so as to sandwich the deposited barrier layer (3), a laminated film (F) is obtained. Examples of the lamination method include dry lamination in which lamination is performed through an adhesive, and sandwich lamination in which lamination is performed while extruding polyethylene at a thickness of about 10 to 30 μm between laminated films.

Adhesive (3) used for laminating includes two-part solution type mainly composed of polyether Z polyurethane, aromatic polyether, aromatic polyester, aliphatic polyester, aliphatic polyurethane, aliphatic poly Adhesive with ether-based polymer solvent A hot-melt adhesive such as a tylene acrylic acid copolymer, an ethylene metatalylate copolymer, or an ethylene acrylate copolymer can be used.

As an example of lamination of the laminated film (F) used in the present invention, as shown in FIG. 1, from the inside, a meta-octene linear low density polyethylene (sealant layer (1)) Z adhesive (3) Z barrier layer ( 2) / Biaxially stretched polyester (or polyamide) (base material layer (4)) or unstretched polypropylene (sealant layer (1)) Z adhesive (3) Z barrier layer (2) Z biaxial Stretched polypropylene substrate layer (4), and as shown in Fig. 2, from the inside, it is a meta-octene linear low-density polyethylene (sealant layer)) Z adhesive (3) Z barrier layer (2) Z biaxially stretched polypropylene (base material layer (4)) Z adhesive (3) Z thin paper (base material layer 4). The base material layer (4) on the outer surface of the laminated film is preferably subjected to a surface treatment described later in order to perform ink jet printing, but instead of the surface treatment, an ink receiving layer (5) described later is formed. May be.

[0020] (Substrate layer printing surface)

In the production method of the present invention, the outer surface of the base film layer (4) of the laminated film that becomes the surface of the packaging bag is a part that is printed in the packaging bag production process. It is required that the ink adherence is good. Specifically, it is preferable to be made of a hydrophobic polymer such as polyamide, polyester, or polypropylene, or paper. When a hydrophobic polymer is used, the surface to be printed has a matte treatment (sand blast surface treatment), corona discharge treatment, plasma treatment (surface treatment by a plasma generated by glow discharge), flame treatment (by PANA). Surface treatment such as surface oxidation) or EB gun (electron gun) treatment is more preferable.

In particular, when a material having a surface wetting index of less than 38 dynes Zcm, such as polypropylene or polyester, is used as the material for the base material layer (4), the mat treatment, corona treatment, It is preferable to use a laminated film including a base material layer having a surface that has been subjected to surface treatment such as plasma treatment, flame treatment, or EB gun treatment to have a surface wetness index of 38 dynes Zcm or more.

[0021] The range in which the laminated film is printed is the entire range except for the heat seal portion. Of course, due to design reasons, do not print on a part of the range excluding the heat seal area. A large range may be provided. On the other hand, whether to print on the heat seal part depends on the type of packaging. First, the horizontal seal position can be printed if it is a normal packaging bag. On the other hand, regarding the vertical seal, when the packaging bag is attached to an envelope, printing is not required on the end surface of one end where the vertical seal is performed. On the other hand, in the case of gluing, you may print up to both ends of the vertical seal. That is, in a state where the outer side surface and the inner side surface are overlapped and heat sealing is performed, the heat sealing characteristics are not deteriorated, and therefore printing is not performed on the outer side surface of the corresponding part.

[0022] In addition, when the base layer (4) is formed of polypropylene, polyester, polyamide, or the like other than paper, an ink receiving layer (5) is formed on the outer side of the base layer (4). It is preferable. Specific examples include inorganic or organic fine particles (silica, alumina, calcium carbonate, styrene plastic pigment, acrylic plastic pigment, etc.) as an ink receiving layer (5) on a polypropylene base layer (4). ) And a binder (a conjugated-gene copolymer latex such as polybutyl alcohol, carboxymethyl cellulose, and styrene-butadiene copolymer, a butyl polymer latex such as an acrylic polymer latex and an ethylene vinyl acetate copolymer). It is preferable to be coated. As a result, ink adhesion and ink retention can be further improved.

[0023] (Printing process)

When printing a packaging bag in the packaging bag manufacturing process as in the manufacturing method of the present invention, it is difficult to use the gravure printing method as described above. Printing on the laminated film.

In the packaging system of the present invention, what can be printed on the laminated film (F) is not limited to character information, and printing that gives a design to the plain laminated film (F) can be performed. Of course, it is possible to print merchandise advertisement information and product information as a design, and it is also possible to print an eye mark indicating the position to be processed, such as a vertical seal or horizontal seal of the laminated film (F).

[0024] (Ink composition)

The ink composition used in the present invention contains a colorant, an ultraviolet curable diluent, a surfactant, and a photoinitiator. UV curable diluents include monomers and prepolymers ( Oligomer) is preferred.

[0025] (Coloring agent)

Examples of the colorant for inkjet include known azo dyes and dyes such as phthaloshun dyes used in ultraviolet curable inks, organic pigments such as azo pigments, anthraquinone pigments, and isoindoline pigments, and inorganic pigments such as carbon black. Pigments are used.

[0026] (UV curable diluent)

(Monomer)

As the monomer of the ultraviolet curable diluent, mono- or polyfunctional (meth) acrylate is preferable. Specific examples of (meth) acrylate include alkyl (meth) acrylate, such as octadecyl (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and ethylene glycol di (meth) acrylate. , Glycol (meth) acrylate, such as dipropylene glycol di (meth) acrylate, or ethoxylated trimethylol propane tri (meth) acrylate, propoxylated neopentyl glycol di (meth) acrylate, etc. ) Various (meth) acrylates such as acrylate. Among these, from the viewpoint of durability of the printed ink, it is preferable that a crosslinked structure is introduced by a polyfunctional monomer.

[0027] (Oligomer)

As the polymer (oligomer) of the ultraviolet curable diluent, polyester (meth) acrylate, epoxy (meth) acrylate, polyurethane (meth) acrylate, or the like can be used.

Specific examples of polyester (meth) acrylates include (meth) acrylic esters of oligoesters that can also produce aliphatic diols and dicarboxylic acid strength. Examples of the aliphatic diol include ethylene glycol, hexanediol, and polyethylene glycol. Examples of the dicarboxylic acid include succinic acid, malonic acid, phthalic acid, and tetrahydrophthalic acid.

Specific examples of epoxy (meth) acrylate include polyethylene glycol diglycidyl ether di (meth) acrylate, trimethylolpropane triglycidyl ether di (meta

) Atallate, bisphenol A epoxy (meth) acrylate, propylene oxide modified Sphenol A-based epoxy (meth) acrylate.

Specific examples of polyurethane (meth) acrylate include (a) hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, and other (b) tolylene diisocyanate. And those obtained by reacting with a polyisocyanate such as hexanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, norbornene diisocyanate.

[0028] (Photoinitiator)

As the photoinitiator, a known radical polymerization type or cationic polymerization type that can cure an ultraviolet curable compound is used. The radical polymerization type includes benzoin isopropyl ether, 2, 4 jetylthioxanthone, etc. These initiators are used in combination with sensitizers such as trimethylamine and p-dimethylaminoacetophenone. Also good.

Examples of the cationic polymerization type include aromatic sulfo-salts.

[0029] (Surfactant)

In order to improve the dispersibility of the colorant and the stability of the dispersed colorant in the composition, a ionic, cationic, or nonionic surfactant is added. It is selected from various kinds of activators, and examples thereof include fluorine-based or silicon-based activators.

[0030] (Ink composition ratio)

The composition ratio of each component of the ink composition is preferably selected within the following range. The total ratio of each component is 100% by weight.

1-10% by weight of colorant

UV curable diluent 75-95 wt%

Surfactant 15-50% by weight

Photoinitiator 3-10% by weight

[0031] (Printing method)

As described above, the laminated film is manufactured by a process in which a printing process and a bag making process are linked. When printing on the laminated film by inkjet method In order to prevent distortion of the pattern, the laminated film that receives printing maintains a flat state that does not cause deflection or loosening even when subjected to the jet pressure of the ink jet, that is, a so-called pinch. It is preferable to receive the print in a state where In this way, in order to maintain a flat state in the printing process in the printing process and the bag making process, the printing process is used in the packaging system used in the packaging bag manufacturing method of the present invention. It is necessary to devise equipment and processes before and after the equipment used for printing.

[0032] (Topcoat layer)

In order to protect printing performed by the above method, a top coat layer may be further provided on the printing surface of the laminated film. The coating liquid used for the top coat is one or more of polyester resin, cellulose derivative, acrylic resin, epoxy resin, urethane resin, phthalic resin, amino resin, etc. Those dissolved in an organic solvent are used. When the coating liquid for coating is applied to the printing surface of the laminated film and the solvent is volatilized, a top coat layer containing the resin as a component is formed. The thickness of the top coat layer is not particularly limited, but is preferably about 1 to: LO / zm.

[0033] (Packaging system)

The packaging system of the present invention is a system capable of forming the above laminated film into a packaging bag and performing design printing on the laminated film. The packaging system of the present invention includes the following devices (a) to (g).

(a) Film unwinding roller for unwinding laminated film

(b) A printing apparatus comprising an inkjet head and an ultraviolet irradiation lamp for printing on a laminated film

(c) A former for forming a laminated film into a cylindrical shape

(f) a film storage device comprising a fixed roll and a movable roll for storing a predetermined length of laminated film placed between the printing device (b) and the former (c); And

(g) A control device for controlling the printing device (b), the vertical seal device (d), and the horizontal seal 'cutting device (e) according to printing conditions and packaging conditions

[0034] Further, it is preferable that the following apparatuses (h) to (i) are included.

(h) The unwinding roller (a) force A second film storage device for continuously unwinding the laminated film and performing printing by the printing device (b) while the laminated film is stopped

(i) A top coat processing apparatus for performing a top coat on the printing surface of the laminated film printed by the printing apparatus (b)

The second film storage device is provided between the unwinding roller (a) and the printing device (b), and the top coat processing device (i) is disposed after the printing device (b). Provided in the process before being supplied to the former (c).

[0035] (Bag making and packaging equipment)

In the manufacturing method of the present invention, since the processes other than the printing process are general bag making processes, a general apparatus used in the process can be used. As a general example of forming a packaging bag from the laminated film (F), a vertical pillow packaging machine will be described below as an example of a bag making and packaging apparatus. An example of a general vertical pillow packaging machine is shown in Fig. 6 as described above. A bag making and packaging machine for vertical pillow packaging is generally a former for forming a laminated film (F) fed from a winding roller (15) (not shown in FIG. 4) into a cylindrical shape (F). 13) A pull-down mechanism (14) for transporting the laminated film (F) formed into a cylindrical shape downward along the former (13), and the laminated film (F) in a tubular shape is long. A vertical seal device (11) for sealing the overlapping portions on the former (13) and a pair of horizontal seals for horizontally sealing the vertically laminated cylindrical laminated film (F) at a predetermined interval Basically composed of a seal 'cutting device (12)! Speak.

[0036] (Unwinding roller, guide roller)

The laminated film (F) is also unwound by the film unwinding roller (15), guided to the plurality of guide rollers (16), and introduced into the bag making and packaging apparatus (10) to form a cylindrical shape. Molded. The outline of the process up to introduction into the bag making and packaging machine (10) is shown in Fig. 3. In the present invention, as shown in FIG. 3, in the process from the winding roller (15) to the bag making and packaging device (10), a printing device (17) and an ultraviolet irradiation device (18) are provided and necessary. Corresponding coating rollers (19), topcoat processing equipment, film storage equipment, etc. will be provided.

[0037] (Printer)

The printing device (17) used in the present invention is an ink jet printing device, and includes an ink tank, an ink supply path for supplying ink of tank power to the ink head, and an ink jet head for discharging ink (not shown). The inkjet head is composed of a plurality of pieces and is arranged in the film width direction. Each inkjet head prints at the packaging bag production speed, so it is preferable not to slide in the film width direction. Ink head force Color printing is performed on the laminated film surface by the ejected ink. For color printing, the printing device (17) usually has three ink spraying portions. Since the inkjet head itself has a large number of nozzles, printing in the width direction of the laminated film (direction perpendicular to the traveling direction) can be performed by arranging the nozzles in a direction perpendicular to the film traveling direction. can do. However, the width of a single inkjet head is limited. Therefore, for printing a wide film, a plurality of inkjet heads can be arranged in a direction perpendicular to the film traveling direction.

[0038] The ink jet head is preferably two types of ink jet heads depending on the contents to be printed on the laminated film. That is, the printing apparatus (17) used in the present invention includes an inkjet head A for printing at least one of the pattern and product information, an eye mark, a shelf life, a expiration date, a manufacturing year related to the product to be packaged. It is preferable to have at least two types of inkjet head B for printing at least one of the deadline information such as the date and time.

[0039] Since the inkjet head A is in charge of printing a picture and product information, the inkjet head A is composed of a plurality of heads arranged in a direction orthogonal to the laminated film traveling direction so that wide printing can be performed on the laminated film. Well, I like to be.

On the other hand, the inkjet head B is in charge of printing such as an eye mark and expiration date information, and therefore may be arranged to print at any one position in the direction orthogonal to the laminated film traveling direction. Prefer U ,. Of these, the inkjet head B is preferred. A preferable arrangement is one of the positions of one of the above-mentioned forces in the direction orthogonal to the film traveling direction.

[0040] Alternatively, any one of the plurality of inkjet heads that print the pattern or the product information that uses the inkjet head B dedicated to printing the eye mark or the expiration date information is used for the eye mark or the expiration date information. The printing can also be used as a dual purpose.

[0041] As described above, during printing of the laminated film, it is preferable that the portion that receives the printing is held in a state where the plane can be maintained even if a slight amount of jetting force is applied. For this reason, in the packaging system of the present invention, the printing apparatus (b) can stably hold the laminated film as an apparatus to be used in the printing process, as well as an ejection mechanism that ejects the printing liquid by the ink jet. Therefore, it is preferable to provide a mechanism for moving the inkjet head in the moving direction of the film, a support plate (22) for supporting the laminated film, and a suction device (not shown) provided in the support plate (22). . The support plate (22) is provided in a flat state, particularly preferably in a horizontal state, and includes a plate on which printing is performed in the corresponding portion. The laminated film present on the surface of the plate is vacuum-sucked by the suction device on the surface opposite to the surface to receive printing, and comes into close contact with the support plate (22). Even if the inkjet head moves for wide-range printing, and the inkjet head force and the ink composition are ejected, the laminated film can continue to maintain flatness.

[0042] Depending on the mechanism of the apparatus such as a movable conveyor, printing can be performed while maintaining the flat surface while moving while adsorbed to the support plate. However, such a mechanism is employed and is stable. When a typical operation is required, a cost problem arises. Therefore, it is preferable that the laminated film be printed while the inkjet head is moved within a predetermined range during the printing while the laminated film is fixed to the support plate by the suction device.

[0043] (Film storage device)

As described above, in the printing process, if a mechanism for intermittently stopping the laminated film is adopted, the entire process is intermittently performed, or the entire process is continuously performed. However, it is necessary to be able to perform only the printing process intermittently. In order to shorten the manufacturing time of the packaging bag, a method of intermittently performing the latter printing process is preferable. Even with such an intermittent printing method, as a printing speed, printing of 20 to 40 mZmin is possible at present, so it is possible to connect the printing process and the packaging process itself. However, a mechanism for intermittently operating only the printing process related to the operation of the laminated film in other processes before or after the printing process or before and after the printing process is required. Therefore, the packaging system of the present invention preferably includes a film storage device.

When the film storage device (f) disposed between the printing device (b) and the former (c) is provided, the vertical seal can be used even when printing by a printing process is performed in the laminated film stopped state. The vertical sealing, horizontal sealing, and cutting by the apparatus (d) and the horizontal sealing apparatus (e) can be performed while a cylindrical laminated film is continuously supplied.

On the other hand, if a second film storage device (h) is provided between the unwinding roller (a) and the printing device (b), the laminated film can be continuously formed regardless of the operating state of the printing process. It can be rolled up.

A known mechanism can be adopted as the mechanism of the film storage device that can be earned. For example, as shown in FIG. 3, it is composed of at least two stationary rollers (24) and at least one movable roller (23), and the movable between two stationary rollers (24). A mechanism for storing the laminated film can be exemplified by disposing a roller (23) and moving the movable roller (23) relative to the fixed roller (24). In FIG. 3, dashes are added to the numbers of the movable roller and the fixed roller used in the second film storage device.

[0045] (Ultraviolet irradiation device)

The printing device (17) used in the present invention includes an ultraviolet irradiation device (18). Unlike normal printing, in the packaging system of the present invention, a laminated film (F) packaging bag is used so that the laminated film is moving at a high speed. The design printed above requires quick drying. For this reason, in the present invention, the ink applied to the laminated film with the ultraviolet curable ink is printed on the ultraviolet irradiation device ( According to 18), the monomer and oligomer in the ink composition are rapidly cured and solidified, and are fixed on the surface of the laminated film as a packaging bag design.

[0046] The ultraviolet irradiation device (18) has an ultraviolet lamp having a length corresponding to the width of the laminated film, and a reflector surrounding the upper side of the ultraviolet lamp whose bottom surface is open (not shown). As such an ultraviolet irradiation device (18), a known device can be used, and for example, it is also shown in Patent Document 2 below.

Fig. 3 shows an example in which one set of printing device (17) and ultraviolet irradiation device (18) is provided. For each 1S printing color (basic color), three sets (or more) of printing devices ( 17) and an ultraviolet irradiation device (18) may be provided.

Patent Document 2: Japanese Patent Application Laid-Open No. 2004-284211

[0047] In addition, as described above, when the printing apparatus (17) force used in the present invention includes at least two types of the ink jet head A and the ink jet head B, the appropriate irradiation content varies depending on the printing content. Also from the viewpoint of shortening the process time, the ultraviolet lamp includes an ultraviolet lamp A that irradiates the printing surface printed by the ink jet head A, and an ultraviolet lamp B that irradiates the printing surface printed by the ink jet head B. It is preferable to have.

[0048] (Coating Grolla)

After printing on the laminated film, if it is necessary to have a viewpoint such as preventing printing blurring when the surface is rubbed, for example, when the ink and the base material are incompatible, the laminated film The printed surface of the laminated film may be protected by roll coating or gravure coating on the printed surface. In this case, it is necessary to provide a coating roller (19) behind the ultraviolet irradiation device (18).

[0049] (Topcoat treatment device)

Alternatively, in order to protect printing, when the top coat layer is provided on the laminated film, a top coat processing apparatus for performing a top coat on the printing surface of the laminated film printed by the printing apparatus (b) ( i) (not shown) can also be incorporated. The top coat treatment device (i) includes a mechanism for coating the coated film with the coating coating liquid by means such as coating or spraying, and, if necessary, coating. Thereafter, a drying mechanism for volatilizing the solvent contained in the coating liquid for coating may be provided.

[0050] (Control device, sensor)

The position and timing of the horizontal and vertical seals are controlled by the control device (21). In order to judge the exact position and timing, it is preferable to provide a sensor (20). When the eye mark is printed on the laminated film (F) by the printing device (17), the eye mark printed on the laminated film (F) is printed between the printing device (17) and the former (13). A sensor (21) to detect is arranged, and based on the signal detected by the sensor, the control device (21) determines the position and timing at which horizontal sealing and vertical sealing should be performed. Bags are possible.

[0051] (Bag-making process after printing)

The printed packaging bag is formed into a bag-making packaging bag through the following general process by the printing apparatus. The laminated film (F) is transported by the pull-down belt (14c) of the bag making and packaging machine (10) toward the shoulder (13a) of the former (13).

The laminated film (F) is formed into a tubular shape in the course of being conveyed from the shoulder portion (13a) of the former of the bag making and packaging machine (10) to the cylindrical portion (13b), and is formed along the former surface. Then, both ends of the film are overlapped in the film running direction, and the laminated film is vertically sealed by the longitudinal sealing device (11) on the front surface of the former. The vertical seal can be either an envelope-attached or a palm-attached type.

[0052] Next, the laminated film (F) is sealed at an appropriate interval by a horizontal seal and cutting device (12), and the laminated film (F) is an unfinished packaging bag having an open upper end (B). In addition, the product (C) is supplied into the unfinished packaging bag (B) through the inner cavity of the tubular portion (13b) of the former. Finally, the upper end of the unfinished packaging bag (B) is sealed by the horizontal seal 'cutting device (12) and cut into individual bags by the knife of the horizontal seal' cutting device (12). As a part of the packaging system, a packaging bag (B) that is inkjet-printed and in which the item (C) is hermetically filled is produced.

[0053] (Bag form)

When a packaging bag is produced by the vertical pillow packaging machine described above, a pillow type packaging is used. Although a bag is manufactured, the packaging system of the present invention can also manufacture a square gusset bag or a four-sided seal bag without being limited to the pillow type.

Industrial applicability

By incorporating a printing function for a plain film into the packaging bag manufacturing system, the present invention makes it easy to change the printing design and printing contents according to the items wrapped in the bag. Since the supplied laminated film is plain, the manufacturing process of the laminated film can be simplified, so the manufacturing process of the laminated film can be simplified and the manufacturing process of the packaging bag can be diversified. High utility value, on.

Claims

The scope of the claims

[1] While winding a plain laminated film having a base material layer, a vapor deposition layer and a sealant layer

, Supply to inkjet printer,

From the head of the printer, an ultraviolet curable ink composition is jetted, and a desired design including product information and a pattern is printed on a predetermined surface of the laminated film base layer. After the printing process for curing the ultraviolet curable ink composition, the printed laminated film is supplied to a bag making and packaging machine, and the laminated film is formed into a cylindrical shape while the length of the laminated film is increased. Characterized in that it comprises a bag-making process in which both end surfaces in the direction are vertically sealed, and then a bag is formed by performing horizontal sealing at a predetermined interval perpendicular to the length direction of the laminated film.

A packaging bag manufacturing method in which a printing process and a bag making process are performed in a series of steps.

[2] The method for producing a packaging bag according to claim 1, wherein the printing is performed on the laminated film in a state where a flat surface is maintained.

[3] The method for producing a packaging bag according to claim 1, wherein, in the printing, printing is not performed on a surface of the base material layer on which the vertical seal of the laminated film is applied.

[4] Using the laminated film including a base material layer having a surface subjected to mat treatment, corona treatment, plasma treatment, flame treatment, or EB gun treatment, the printing is performed on the treated surface. The manufacturing method of the packaging bag of Claim 1 performed as this.

[5] Surface with a wetting index of 38 dynes Zcm or more by matting, corona treatment, plasma treatment, flame treatment, or EB gun treatment on materials with a surface wetting index of less than 38 dynes Zcm The method for producing a packaging bag according to claim 1, wherein the printing is performed by using the laminated film including the base material layer including the printed surface as the printed surface.

[6] The production of the packaging bag according to claim 1, wherein the printing is performed by using the laminated film having an ink receiving layer formed on the surface of the base material layer and using the ink receiving layer as a printing surface. Method.

[7] The method for producing a packaging bag according to claim 6, wherein the ink receiving layer is formed of inorganic or organic fine particles and a thermoplastic polymer binder.

[8] The method for producing a packaging bag according to claim 1, wherein the ultraviolet curable ink composition contains a colorant, a surfactant, an ultraviolet curable diluent, and a photoinitiator.

[9] The ultraviolet curable diluent according to claim 8, wherein the ultraviolet curable diluent is mono- or polyfunctional alkyl (meth) acrylate, glycol (meth) acrylate, or alkoxylated glycol (meth) acrylate. Manufacturing method for packaging bags.

[10] The method for producing a packaging bag according to claim 8, wherein the ultraviolet curable diluent contains a prepolymer.

[11] The method for producing a packaging bag according to claim 8, wherein the prepolymer is polyester (meth) acrylate, epoxy (meth) acrylate, or polyurethane (meth) acrylate.

[12] The method for producing a packaging bag according to claim 1, wherein the printing design includes at least one of eye mark printing on a laminated film and deadline information on a product to be packaged.

[13] The method for producing a packaging bag according to claim 1, wherein a top coat layer is further formed on the printed surface of the laminated film after the laminated film is printed.

[14] (a) Film unwinding roller for unwinding the laminated film,

(c) a former for forming a laminated film into a cylindrical shape,

(g) A packaging system comprising a control device for controlling the printing device (b), the vertical sealing device (d), and the horizontal sealing and cutting device (e) according to printing conditions and packaging conditions.

[15] The printing by the printing apparatus (b) is performed in a laminated film stop state, 15. The packaging system according to claim 14, wherein the vertical sealing, horizontal sealing, and cutting by the vertical sealing device (d) and the horizontal sealing device (e) are performed while a cylindrical laminated film is continuously supplied.

[16] A second film storage device (h) for continuously unwinding the laminated film while performing printing by the printing device (b) while the laminated film is stopped while the unwinding roller (a) force is provided. 15. The packaging system according to claim 14, provided between the unwinding roller (a) and the printing device (b).

[17] The printing apparatus (b) performs printing in a state where the laminated film maintains a flat surface, and further, under a mechanism for moving the inkjet head in the moving direction of the film, the ink jet head, 15. The packaging system according to claim 14, further comprising a support plate that supports the laminated film, and a arch I device that is provided on the support plate.

[18] The ink jet head has at least one of an inkjet head A for printing at least V of the pattern and product information on the laminated film, and an eye mark and time limit information on the product to be packaged. 15. The packaging system according to claim 14, comprising an inkjet head B for printing.

[19] The inkjet head A is composed of a plurality of heads arranged in a direction orthogonal to the laminate film traveling direction so that wide printing can be performed on the laminate film, and the inkjet head B is configured to advance the laminate film. 19. The packaging system according to claim 18, wherein the packaging system is arranged to print at one position in the direction perpendicular to the direction.

[20] The irradiation lamp includes an ultraviolet lamp A that irradiates a printed surface printed by the inkjet head A, and an ultraviolet lamp B that irradiates a printed surface printed by the inkjet head B. 19. The packaging system according to 19.

[21] The ink jet head includes a plurality of ink jet heads arranged in a direction orthogonal to the traveling direction of the laminated film so that at least one of a pattern and product information can be printed on the laminated film in a wide width. 18. The packaging according to claim 17, wherein at least one of the plurality of ink jet heads is also used to print at least one of the eye mark and the expiration date information on the packaged product. system.

[22] The packaging system according to claim 14, wherein a sensor for detecting the eye mark is provided between the printing apparatus and the former.

[23] The control device (g) controls the vertical sealing device (d) so as to perform vertical sealing on a portion where the laminated film is not printed by the detection signal of the sensor force. The packaging system according to claim 14.

[24] The unwinding roller (a) force The supplied laminated film stops and the printing apparatus

While printing is being performed on the laminated film surface according to (b), the film storage device

15. The packaging system according to claim 14, wherein control is performed by the control device (g) so that the laminated film stored in (f) is supplied to the former (c).

[25] The packaging according to claim 14, wherein a topcoat processing device (i) for performing a topcoat is further incorporated on a printing surface of the laminated film printed by the printing device (b). system.