JP2000177728A - Wrap film storage carton - Google Patents

Abstract

(57) [Problem] To provide a self-adhesive wrap film made of polyethylene, polypropylene, polymethylpentene, polypropylene, etc., which prevents the end of the wrap film from being cut back into the carton after cutting. A wrap film with excellent wrap film holding parts that can be easily formed with a resin coating layer using a normal gravure printing machine without the need for special curing equipment, etc. To provide a storage carton. A lid is connected to one side edge of an opening of a carton body so as to be openable and closable, and the wrap film drawn to a desired length is provided at a position covering the front plate and the front plate. In a wrap film storage carton that is pressed between the cover piece of the body and cut and used with a cutting blade, a wrap film holding portion is provided at least in a part overlapping the cover piece of the front plate, and the wrap film holding portion is modified with silicon. A wrap film storage carton characterized by being formed by a coating layer of a resin containing an acrylic resin as a main component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrap film storing carton for storing a wrap film wound in a roll shape, and more particularly to an improved technique for preventing a film end from rewinding.

[0002]

2. Description of the Related Art Conventionally, a wrap film storage carton having a function of preventing rewinding of a film end of a wrap film is known. In this wrap film storage carton, the roll-shaped wrap film stored in the carton is pulled out to a desired length and pressed between the front plate of the carton body and the cover piece of the cover covering this front plate. The wrapped film is cut and used by a cutting blade. At this time, the edge of the wrap film, which is the leading edge of the next withdrawal, often does not remain outside of the carton in the pulled-out state, but rewinds inside the carton, and often occurs. Making it difficult. In order to prevent this rewinding, various types of wrapping film storage cartons have been proposed in which a front plate pressed against cutting the wrapping film has some rewinding prevention function.

[0003] That is, as a rewind preventing function, a pressure-sensitive adhesive layer is provided as a wrap film holding portion on a front plate constituting a wrap film storage carton, and a cover piece stacked at a position covering the front plate is provided. A method of exposing the pressure-sensitive adhesive layer to the surface of the carton when the peeling-off piece connected to the strip is removed and holding the cut wrap film end by the pressure-sensitive adhesive layer to prevent rewinding. There is.

Further, a method of laminating the entire carton or the surface of the front plate with a film and using the smoothness of the surface as a smooth surface to hold the edge of the wrap film by self-adhesion of the wrap film. There is also.

Further, Japanese Patent Application Laid-Open No. 64-9151 discloses that a front plate of a carton and a cover plate provided at a position covering the front plate overlap with a front surface of the front plate or a back surface of the cover plate. There is also a method in which a flat coating layer made of a crosslinkable curing varnish is provided, and the flat coating layer is held by utilizing the self-adhesion of the wrap film to the smooth surface of the coating layer.

[0006]

However, in the above-described conventional method, for example, in the case of using the first adhesive, if the adhesive itself is too strong, the wrap film will adhere too strongly. When the wrap film is pulled out, the wrap film is cut off, and the adhesive-applied surface gradually adheres to dust, dust, etc., thereby deteriorating the wrap film holding property and becoming unsanitary.

Further, a method of laminating a smooth film on the entire carton or the surface of the front plate and holding the wrap film on the front plate having the smooth surface by utilizing the self-adhesion of the film has been proposed. Some wrap films, such as polyvinylidene chloride, have good retention stability, but wrap films with poor self-adhesion, such as polyethylene, polypropylene, polymethylpentene, and polypropylene, have poor adhesion and have insufficient function to hold the film. Absent. In order to provide the carton surface with such a smoothness that the wrap film can be held, usually 10
It is necessary to laminate a film having a thickness of μm or more, and there is a disadvantage that the cost is increased.

In this respect, a method of providing a flat coating layer with a crosslinkable curing varnish on the front surface of a carton or the back surface of a cover piece and holding the wrap film by utilizing the smoothness of the film is as follows. Compared with the method of laminating, the material cost is lower, but the holding stability of wrap film such as polyvinylidene chloride with self-adhesion is good, as in the case of providing a laminate with a smooth film on the surface,
Polyethylene, polypropylene, polymethylpentene,
In a wrap film having poor self-adhesion such as polypropylene, the function of holding the wrap film is insufficient due to weak adhesion. Furthermore, a special curing device such as an electron beam irradiation device, an ultraviolet irradiation device, or a heat beam irradiation device is required for crosslinking and curing, and cannot be processed at a high speed with a normal gravure printing machine. There is a problem that the processing cost is increased.

SUMMARY OF THE INVENTION The present invention has been found to solve the above-mentioned problems, and an object of the present invention is to provide a wrap film holding portion for preventing a wrap film end after cutting from rewinding into a carton. Is formed with a coating layer of a resin having good adhesion to a wrap film having poor self-adhesion such as polyethylene, polypropylene, polymethylpentene, and polypropylene, and further, in forming the coating layer, a special No need for a curing device, etc.
It is an object of the present invention to provide a wrap film storage carton having a wrap film holding portion which can be easily formed by an ordinary gravure printing machine and has excellent performance and productivity.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a cover is provided on one side edge of an opening of a carton body in which a wrap film wound in a roll is stored. A wrap which is continuously connected and drawn out to a desired length, is pressed between a front plate and a cover piece of the lid provided at a position covering the front plate, and is used by cutting with a cutting blade. In the film storage carton, at least a part of the front plate that overlaps with the cover piece is provided with a wrap film holding portion, and the wrap film holding portion is formed by a coating layer of a resin containing a silicon-modified acrylic resin as a main component. Characteristic wrap film storage carton.

According to the present invention, the wrap film holding portion for preventing the film end after cutting from rewinding into the carton is used for a wrap film having poor self-adhesion such as polyethylene, polypropylene, polymethylpentene and polypropylene. It is formed with a resin coating layer with good adhesion, and the coating layer can be easily formed by a normal gravure printing machine without the need for a special curing device. And a wrap film storage carton having a wrap film holding portion excellent in productivity.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the wrap film storage carton of the present invention, the portion of the wrap film holding portion formed by a coating layer of a resin containing a silicone-modified acrylic resin as a main component for preventing the wrap film from rewinding into the carton has a carton shape. Specifically, it differs depending on the mounting position of the cutting blade for cutting the wrap film. The place where the wrap film holding part is provided is
After the wrap film is pulled out of the carton body and cut, any surface may be used as long as the wrap film comes into contact with the carton, and is not particularly limited. However, in general, when cutting the wrap film, the wrap film is sandwiched between the front plate of the carton body and the cover piece overlapping it, and cut while holding it from the outside, so the wrap film is attached to the front plate of the carton. It becomes easy to be pressed and adhered. Therefore, the wrap film holding portion is preferably provided at a position on the front plate surface where the wrap film is sandwiched. Also, the size and shape of the wrap film holding portion are free,
The function of holding the wrap film may be freely determined depending on the material of the wrap film, the shape of the carton, the mounting position of the cutting blade, and the like.

FIGS. 1 to 3 show typical examples of a wrap film storage carton in which the shape and the mounting position of the wrap film are different from each other. When cutting, it is preferable that the wrap film is located in an area including a position where the wrap film is strongly pressed against the carton surface, and as a result,
The wrap film is naturally pressed against the wrap film holding part by the operation of cutting the wrap film and closely adhered,
Will be retained.

FIG. 1 is a perspective view showing a first embodiment of a wrap film storage carton according to the present invention, and shows a state in which the carton is opened. FIG. 4 is an exploded view of the wrap film storage carton of this embodiment, and the names of the respective parts are described. Also, FIG.
The carton having the form shown in FIG. 3 will also be described using this name.

The wrapping film storage carton A is characterized in that the saw blade-shaped film cutting blade H is linear, and the mounting position is the opening piece at the end of the linear cutting line L provided on the cover piece 15. When the strip 16 is peeled off and removed, it is attached to the back surface of the cover piece 15 so as to extend over the cut line L so that the blade edge slightly protrudes. In the case of this type, the wrap film holding portion P is preferably provided at a position shown in a schematic diagram on the surface of the front plate 11 of the wrap film storage carton A. By providing at this position, when cutting out the drawn wrap film F, the wrap film F sandwiched between the cover piece 15 and the front plate 11 of the wrap film storage carton A can be manually held from the outside of the cover piece 15. The wrap film F is pressed against the wrap film holding portion P, so that the wrap film F is pressed against the surface of the front plate 11 and cut.

Note that the wrap film storage carton B shown in FIG. 2 similarly to FIG. 1 shows the state after opening each type of wrap film storage carton, so that the cover piece 15 shown in FIG. The portion ahead of the provided cut line L is also an unsealing piece 16, which has been peeled off and removed at the time of unsealing and is not shown.

FIG. 2 is a perspective view showing a second embodiment of the wrap film storage carton of the present invention. The feature of the wrap film storage carton B is that, unlike the wrap film storage carton A of FIG. 1, the saw blade-shaped film cutting blade H has a V-shape as shown in the figure. Therefore, the cover piece 15 is provided with a V-shaped cutting line L having the same shape as the cutting blade H, and the opening piece 16 therefrom is peeled off.
When removed, the cutting blade H is attached to the cover piece 15 at a position on the back surface of the cover piece 15 so that the cutting edge H of the V-shaped cutting blade H slightly protrudes. Then, when cutting the wrap film F, while holding the wrap film F at a position near the V-shaped tip of the cover piece 15,
Since the wrap film F is cut from the center of the wrap film F toward both sides, the wrap film holding portion P is, as shown in the figure, the center of the surface of the front plate 11 of the wrap film storage carton B. It is preferable to provide the wrap film F at a slightly upper position because the wrap film F can be easily adhered.

FIG. 3 is a perspective view showing a third embodiment of the wrap film storage carton of the present invention. In this wrap film storage carton C, the film cutting blade H
When the wrap film storage carton C is assembled, the cutting edge of the saw blade-shaped cutting blade H is slightly forwardly protruded from the bottom plate 12 of the wrap film storage carton C, that is, the front plate 11 side. Mounted on the surface. The wrap film holding portion P is provided on the surface of the front plate 11 of the wrap film storage carton C at a position where the wrap film F is pressed by the cover piece 15 and the film cutting blade H, as shown in the drawing.

FIG. 4 is an exploded view of the blank of the wrap film storage carton A according to the first embodiment of the present invention described above with reference to FIG. Wrap film storage carton A
The blank 10 has a bending line a, as shown in FIG.
a front plate 11, a bottom plate 12, and a rear plate 1 connected to each other via b and c
3 and a cover plate 14, and a folding piece 17 is provided on a side edge of the front plate 11 via a bending line e.
Cover pieces 15 are respectively connected to the side edges of each of the above through a bending line d. An opening piece 16 is connected to the cover piece 15 via a cutout line L. The opening piece 16 can be separated by the cutout line L. The cut line L is formed in a shape that is easy to cut, such as a perforation or a lead rule. Further, the opening piece 16 is formed with a plurality of semicircular cuts 23 having the same direction at equal intervals along the longitudinal direction.

Front plate 11, bottom plate 12, rear plate 13, cover plate 14
The first side pieces 18, 18 ', the side plates 19, 19', the second side pieces 20, 20 ', and the side cover plate 21 are respectively provided at both end positions of the cover piece 15 and the cover piece 15 via bending lines f, f', respectively. ,
21 'and side cover pieces 22, 22' are provided in series.
Here, the length of the side plates 19, 19 'is substantially the same as the width of the front plate 11 and the rear plate 13, and the length of the first side pieces 18, 18' and the second side pieces 20, 20 'is the side plate. 19, 19 '. The length of the side cover plates 21 and 21 ′ is
9 and 19 ′, and is approximately half the length of the side cover 22,
The length of 22 ′ is shorter than the width of the cover plate 14.

As shown in the figure, the surface of the front plate 11 has the same diameter as the notch 23 at a position where it comes into contact with the semicircular notch 23 of the opening piece 16 when formed in the wrap film storage carton A, as shown in FIG. Are provided.
And in the wrap film storage carton of the present invention, the film holding portion P for preventing the wrap film end from rewinding into the carton is provided.

For the film holding portion P, a coating layer mainly composed of a silicon-modified acrylic resin having good adhesion to a wrap film is used. In this silicon-modified acrylic resin, methylpolysiloxane, ethylpolysiloxane A resin modified with an intermediate composed of siloxane such as dimethylpolysiloxane, diethylpolysiloxane, etc., and is provided with releasability, heat resistance and the like in advance by using a siloxane having an oligomerized reactive group. Further, Si-OH and Si-OMe are used as the reactive groups, and an acrylic resin that reacts with these reactive groups is blended and cooked for modification. As the acrylic resin, acrylates, methacrylates, and the like can be used. In this silicone-modified acrylic resin, the higher the silicone content, the better the weatherability, but it is preferably 50% or less in terms of cost.
This silicone-modified acrylic resin is not of a type that forms a dried coating layer by crosslinking and curing after application, but of a type that can form a dried coating layer by heating and drying a solvent component. The formation of the layer does not require a special curing device for a cross-linking reaction, and the coating layer can be easily formed by an ordinary gravure printing machine or the like.

The coating layer mainly composed of the silicone-modified acrylic resin as described above is usually prepared by dissolving these resins with an organic solvent and adjusting the viscosity, evaporation rate and the like suitable for a coating means such as gravure printing. To make a coating solution, apply this,
It is formed by drying. The smoother the surface of the coating layer, the better the adhesion to the wrap film and the better the film retention. Therefore, it is preferable that the coating liquid for forming the coating layer has a low viscosity and is gradually dried so that the surface is leveled after the coating.

The thickness of the coating film layer when dried is 2 to 10
The thickness may be about μm, and 3 to 6 μm is preferable because the workability of coating is good. If it is less than 2 μm, the smoothness of the surface is insufficient and the retention of the wrap film is reduced. If it exceeds 10 μm, the retention of the wrap film is not further improved, and the material is wasted. It is also not desirable in terms of point.
The place where the coating layer is provided is not particularly limited as long as the wrap film is pulled out of the carton body and cut, and then the wrap film comes into contact with the carton. However, in general, when cutting wrap film, the wrap film is sandwiched between the front plate of the carton body and the lid that overlaps it, and cut while pressing from the outside, so the wrap film is the front plate of the carton. Pressed against the part, it is easy to adhere. Therefore, the coating layer for film retention is
It is preferable to provide the front plate portion at a position where the film is sandwiched. Further, the size and shape of the coating layer are free, and may be freely determined depending on the material of the wrap film, the shape of the carton, the mounting position of the cutting tool, or the like so that the film holding property is stabilized.

Next, in the case of such a wrap film storage carton A, the blank 10 is assembled as follows. First, the blank 10 is divided into bending lines a, b,
It is bent along c, d, e, and f, the back surface of the folded piece 17 is attached to the back surface of the front plate 11, and then the second side piece 2
The first side pieces 18, 18 'are sandwiched between the front surfaces of 0, 20' and the back surfaces of the side plates 19, 19 ', and the respective contact surfaces are adhered to each other to form a carton storage portion. In addition, the lid portion includes the surfaces of the side lid pieces 22 and 22 ′ and the side lid plate 21,
It is formed by sticking the back surface 21 ′.

In the wrap film storage carton A thus assembled, a roll-shaped wrap film or the like is stored in the concave portion of the storage section. Then, the front surface of the front plate 11 and the back surface of the opening piece 16 of the cover piece 15 are adhered by an adhesive applied in a strip shape so as to overlap the half cut portion 24 of the front plate 11, thereby sealing the carton. . In this case, only the inside of the half cut portion 24 from which the overprint varnish has been removed is adhered to the inside of the cut 23 of the opening piece 16.

At the time of use, as shown in FIG. 5, the unsealing piece 16 is provided with the knob 2 on the base end side of the semicircular cut 23.
When the pin 5 is pinched and the opening piece 16 is cut off from the cut line L, the carton is opened by delamination of the paper on the surface inside the half-cut portion 24 which is the adhesive portion, and the cutting blade H is cut from the opening portion. Exposed. At the same time, the roll-shaped wrap film F stored in the carton is also exposed, so that the wrap film F can be fed out by a required amount and cut by the cutting blade H.

Hereinafter, the present invention will be described with reference to specific examples. [Example 1] A coated ball (paperboard) having a basis weight of 450 g / m2 was used as a carton material, and a predetermined pattern and overprint varnish were printed in-line with the wrap film holding section using an inline apparatus for rotogravure printing. Using a coating liquid composed of silicone-modified acrylic resin (trade name: WG (manufactured by Nippon Kakko Co., Ltd.)), FIG.
At the position shown in FIG. 4 and dried, and punched into the shape shown in FIG. 4 to form a carton blank. Subsequently, a straight saw blade-shaped cutting blade H was attached to the same position as shown in FIG. 4 by a dedicated device, and further, the body was pasted by a sack pasting machine to prepare a wrap film storage carton of Example 1.

The wrap film storage carton prepared by the above method is separately filled and packed with a polyvinylidene chloride resin wrap film, a polyvinyl chloride resin wrap film, and a polyethylene resin wrap film.
Open each, pull out the wrap film, cut,
The film retention properties due to the adhesion of the wrap film to the coating layer were evaluated. The results were all good, showing good adhesion, showing sufficient film holding properties, and having good adhesion without too much film breakage.

[0030]

The wrap film storage carton of the present invention is used as a film holding portion for preventing the end of the wrap film pulled out during use from rewinding into the carton.
A coating film formed by applying a coating liquid containing a silicon-modified acrylic resin as a main component to a predetermined portion of a carton using a gravure printing machine or the like, which can form a dried coating film by heating and drying a solvent component in the solution. Layers,
The coating layer of the silicone-modified acrylic resin has good adhesion to the wrap film and has a smooth surface, so that the wrap film is well adhered and held. Also, even if it adheres too much to a smooth surface,
It is possible to obtain a wrap film storage carton in which the wrap film can be easily pulled out.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a first embodiment of a wrap film storage carton according to the present invention.

FIG. 2 is a schematic perspective view showing a second embodiment of a wrap film storage carton according to the present invention.

FIG. 3 is a schematic perspective view showing a third embodiment of a wrap film storage carton according to the present invention.

FIG. 4 is an exploded view of a blank of the first embodiment of the wrap film storage carton according to the present invention.

FIG. 5 is a perspective view showing the opened state of the first embodiment of the wrap film storage carton according to the present invention.

[Explanation of symbols]

 A First Embodiment of Wrap Film Storage Carton B Second Embodiment of Wrap Film Storage Carton C Third Embodiment of Wrap Film Storage Carton H Cutting Blade L Cutout Line F Wrap Film 10 Blank 11 Front Plate Reference Signs List 12 bottom plate 13 rear plate 14 cover plate 15 cover piece 16 unsealing piece 17 folded piece 18 first side piece 19 side plate 20 second side piece 21 side cover plate 22 side cover piece 23 cut 24 half cut part 25 knobs a to f Ruled line

Claims (1)

[Claims] 1. A lid body is connected to one side edge of an opening of a carton body in which a wrap film wound in a roll shape is housed so as to be openable and closable. In a wrap film storage carton that is pressed between a plate and a cover piece of the lid provided at a position covering the front plate and cut and used by a cutting blade, at least a part of the front plate that overlaps with the cover piece. To
A wrap film storage carton provided with a wrap film holding portion, wherein the wrap film holding portion is formed by a coating layer of a resin containing a silicon-modified acrylic resin as a main component.