WO2015072204A1

WO2015072204A1 - Opening tab and package with opening tab

Info

Publication number: WO2015072204A1
Application number: PCT/JP2014/072286
Authority: WO
Inventors: 大森麻希子; 阿部利博; 鬼澤香代子; 瀬谷清美; 中島浩司; 田中幹雄
Original assignee: 株式会社クレハ
Priority date: 2013-11-13
Filing date: 2014-08-26
Publication date: 2015-05-21

Abstract

Provided are: an opening tab (3) that is joined to the outer surface of a tubular packaging film (1) for packaging an object to be contained, wherein the joint part between the tubular packaging film and the opening tab includes a vertex and two strip-like parts that extend from the vertex in the longitudinal direction of the opening tab; and a packaging bag that is equipped with the tubular packaging film for packaging the contained object and the opening tab joined to the outer surface of the tubular packaging film.

Description

Opening piece and package with opening piece

The present invention relates to a package including a packaging film for individually packaging contents of processed foods such as sausage, processed cheese, ham, and hamburger in a sealed state, and an opening piece joined to open the packaging film. In particular, the present invention relates to a joint structure of an opening piece.

Packaging for processed foods such as sausage, processed cheese, ham, hamburger, etc., is usually filled with processed foods inside a cylindrical packaging film, and as shown in the schematic diagram (reference diagram) of FIG. Both end portions in the longitudinal direction of the packaging film 1 are converged and sealed by the aluminum wire clip 2 or other means. As these packaging bodies, in order to peel off the packaging film and take out processed foods or the like as contents, the unsealing pieces 3 also called cut tapes or openers are used for welding such as ultrasonic welding, high frequency welding, thermal welding, etc. Some of them are provided by bonding with an adhesive or the like. For example, in a cylindrical packaging body in which the opening piece 3 is bonded to the outer surface of the cylindrical packaging film 1, the end portion of the opening piece 3 is grasped with a finger and turned to start the bonding film. 1, a broken portion is formed, and an opening is formed in the cylindrical packaging film 1 by using the broken portion as a trigger. The packaging film is peeled off from the opening to expose contents such as processed food. be able to. In addition, in FIG. 1, although provided so that the longitudinal direction of the opening piece 3 and the longitudinal direction of the cylindrical packaging film 1 may orthogonally cross, it is not restricted to this.

For the unsealed piece, the same material as that for forming the packaging film, particularly the outer surface layer thereof is usually adopted in consideration of the bonding property with the cylindrical packaging film. For example, a polyvinylidene chloride resin film is often used as a packaging film material. In this case, a polyvinylidene chloride resin film is usually used as the opening piece, and when the opening piece is a laminated film, a polyvinylidene chloride resin film is used as the outer surface layer to be joined to the packaging film. Often.

The joint of the opened piece with the packaging film, for example, the welded portion, is the starting point for forming the opening in the packaging film, so the packaging film can be easily peeled off from the formed opening, and the contents such as processed food are exposed. Various attempts have been made to optimize the shape and position of the welded portion in order to facilitate removal. For example, Patent Documents 1 to 3 disclose welding wires having shapes as shown in the schematic diagrams of FIGS. 9 to 11 (reference diagrams showing the prior art).

In the opening piece shown in the schematic diagram of FIG. 9, a single weld line extending in the longitudinal direction of the opening piece is formed as a joint portion, specifically, a welding portion A, spaced from both ends in the longitudinal direction of the opening piece. Has been. The welding part A is opened between, for example, an ultrasonic horn having a predetermined shape (in the case of forming a single welding line, a substantially rectangular shape) and an anvil (a heater may be incorporated). It can be formed by sandwiching a film forming a piece, by ultrasonic heating, and further by heating from an anvil as necessary.

In the opening piece shown in the schematic diagram of FIG. 10, in addition to the welding portion A of the single welding wire, sub welding portions B are formed at two corners of the opening piece. In other words, after filling the packaged film with the open piece joined by welding, the processed food or the like is filled, and then heating such as a retort (heating and pressurizing) process is often performed for the purpose of sterilization. In particular, a portion other than the welded portion of the opening piece may be curled. When the deformation or curl of the opened piece occurs, not only the appearance is bad, but the opened piece is peeled off or the opening part is formed in the packaging film in the subsequent manufacturing process or product distribution process Therefore, food hygiene is a big problem. Therefore, in the retort process or the like, a secondary welded portion B is formed by joining, for example, welding a part of the opened piece to the packaging film with a bonding strength relatively smaller than that of the welded portion A so that the opened piece is not deformed or curled. May be provided. The sub-joint portion, specifically, the sub-weld portion B, is a joint that is relatively smaller than the weld portion A when an opening is to be formed in the packaging film by gripping and turning the end of the unsealed piece with a finger. Due to its strength, the unsealed piece and the packaging film are easily peeled off at the secondary welding part B. As a result, the rupture part is formed in the wrapping film starting from the welding part A, and the rupture part is used as a trigger to open the packaging film. The part can be formed. The position, shape, size, and the like of the sub welded portion B can be selected as appropriate. The sub welded portion B is formed by ultrasonic heating using the ultrasonic horn having a predetermined shape described above and heating from the anvil. It can be done by adjusting.

In the opening piece shown in the schematic diagram of FIG. 11, the shape of the elongate ring-shaped welded portion A is disclosed. In this case, the inside of the welded part A is a non-joined part, specifically a non-welded part. The ring-shaped welded portion A can be formed using an ultrasonic heating horn having a corresponding ring-shaped shape. The unsealed piece shown in the schematic diagram of FIG. 11 may further include a sub welded portion B.

In addition to those shown in the schematic diagrams of FIGS. 9 to 11, the position, shape, size, etc. of the welded portion A and the position, shape, size, etc. of the sub welded portion B can be combined in many ways. Are known. In addition, when forming the welding part A by ultrasonic heating, generally speaking, if the energy provided for ultrasonic heating is the same, the smaller the area of the welding part A, the larger the bonding strength, and the welding part A It is known that the larger the area, the lower the bonding strength. The same applies to the bonding strength of the sub welded portion B.

In an open piece joined to a conventionally known cylindrical packaging film, the shape and size of the opening formed in the packaging film starting from the joint between the cylindrical packaging film and the open piece However, depending on the user and every time it is used, it is not stable, the opening operation is not easy, the shape of the opening is not clean, and the opening piece is attached to the packaging film and remains open. Problems have been pointed out, such as when it takes only one piece to peel, it takes time to dispose of it, and when the opened piece adheres to the packaging film, it also takes time to dispose of it when it tears off in a small area. ing. Also, the size (area) of the opening is small, and it takes time to expose and take out the contents of processed food, etc. Problems such as a large amount adhering and remaining have been pointed out.

Therefore, in the opening piece joined to the outer surface of the cylindrical packaging film for packaging the contents, the cylindrical packaging film for packaging the contents can be opened easily and cleanly, and the opening portion There has been a need for an open piece bonded to the outer surface of a large, cylindrical packaging film. Further, there has been a demand for a package with an opening piece that can easily and cleanly and stably open a cylindrical packaging film for packaging contents and has a large opening.

JP 2011-51610 A Utility Model Registration No. 2529399 JP 2012-101800 A

An object of the present invention is to easily and cleanly and stably open a cylindrical packaging film for packaging contents in an opening piece bonded to the outer surface of the cylindrical packaging film for packaging contents. An object of the present invention is to provide an opening piece having a large opening and bonded to the outer surface of a cylindrical packaging film. Another object of the present invention is to provide a package with an opening piece, which can easily and cleanly and stably open a cylindrical packaging film for packaging contents and has a large opening.

As a result of earnest research on solving the above problems, the present inventors have found that the problem can be solved by making the shape of the joint portion between the cylindrical packaging film and the opening piece unique. Completed the invention.

That is, according to this invention, it is the opening piece joined to the outer surface of the cylindrical packaging film which packages the contents, Comprising: The junction part of a cylindrical packaging film and an opening piece is a vertex, and 2 The above-mentioned opening piece including a strip-like portion extending from the apex of the book in the longitudinal direction of the opening piece is provided.

Further, according to the present invention, the following opening pieces (1) to (15) are provided as embodiments.
(1) The opened piece in which the apex of the joint is chamfered.
(2) The opened piece, wherein the angle formed by the two strips at the apex is 10 to 170 degrees.
(3) The above-mentioned opening piece, wherein at least one of the side surfaces of the two strip-shaped portions is linear.
(4) The above-mentioned opening piece, wherein at least one of the side surfaces of the two strip-shaped portions is a convex curve shape or a concave curve shape.
(5) The above-mentioned opening piece in which the lengths of the two strip-shaped portions are the same.
(6) The above-mentioned opening pieces in which the lengths of the two strip-like portions are different.
(7) The opening piece, wherein the joint portion includes a triangular portion.
(8) The opened piece having a non-joined portion in the inner region of the triangular portion.
(9) The above-mentioned opening piece, wherein the joint portion includes a protrusion that continues to the apex and extends to the opposite side of the strip-shaped portion.
(10) The above-mentioned opening piece, in which at least one strip-shaped portion has a bent portion at the end opposite to the apex.
(11) The opened piece having a plurality of joint portions, and two joint portions of the plurality of joint portions have opposite directions extending from the vertices of the two strip-shaped portions in each joint portion. .
(12) The opening piece, wherein at least one of the plurality of joint portions is a joint portion including a triangular portion.
(13) The opening piece further including a sub-joining portion for fixing the opening piece to the outer surface of the cylindrical packaging film.
(14) The opened piece, wherein the sub-joining portion is a sub-welded portion.
(15) The opened piece, wherein the joint is a welded part.

Furthermore, according to the present invention, there is provided a cylindrical packaging film for packaging contents, and a packaging body with an opening piece comprising the opening piece joined to the outer surface of the cylindrical packaging film.

Further, according to the present invention, as an embodiment, the following packages (A) to (C) are provided.
(A) The said package with an opening piece from which the longitudinal direction of an opening piece differs from the longitudinal direction of a cylindrical packaging film.
(B) The said package with an opening piece in which the longitudinal direction of an opening piece and the longitudinal direction of a cylindrical packaging film orthogonally cross.
(C) The said package with an opening piece whose longitudinal direction of an opening piece and the longitudinal direction of a cylindrical packaging film are the same.

According to the present invention, an opening piece joined to the outer surface of a cylindrical packaging film for packaging the contents, where the junction between the cylindrical packaging film and the opening piece is an apex and two pieces Opening of the cylindrical packaging film for wrapping the contents is performed easily, cleanly and stably by the above-mentioned opening piece including a strip-like portion extending in the longitudinal direction of the opening piece from the apex. The opening piece joined to the outer surface of the cylindrical packaging film with a large opening can be provided.

Further, according to the present invention, the contents are provided by a cylindrical packaging film for packaging the contents, and the package with the opening pieces provided with the opening pieces joined to the outer surface of the cylindrical packaging film. The tubular packaging film for packaging can be opened easily, cleanly and stably, and an effect is provided that a package with an opening piece having a large opening is provided.

It is a schematic diagram (reference drawing) explaining one of the specific examples of a package body with an opening piece provided with a cylindrical packaging film and an opening piece. It is a schematic diagram which shows the specific example of the opening piece of this invention. It is a schematic diagram which shows one specific example of the junction part in the specific example of the opening piece of this invention. ~ It is a schematic diagram which shows the other specific example of the junction part in the specific example of the opening piece of this invention. ~ It is a schematic diagram which shows the other specific example of the junction part in the specific example of the opening piece of this invention. ~ It is a schematic diagram which shows the other specific example of the opening piece of this invention, and the other specific example of a junction part. ~ It is a schematic diagram which shows the other specific example of the opening piece of this invention, and the other specific example of a junction part. ~ It is a schematic diagram which shows the other specific example of the opening piece of this invention, and the other specific example of a junction part. It is the schematic diagram (reference drawing which shows a prior art) which shows the specific example of the conventional opening piece and a junction part. It is the schematic diagram (reference drawing which shows a prior art) which shows the other specific example of the conventional opening piece and a junction part. It is the schematic diagram (reference drawing which shows a prior art) which shows the other specific example of the conventional opening piece and a junction part.

1. Packaging film The tubular packaging film for packaging the contents used to form the packaging body with the opening piece of the present invention is bonded to the outer surface of the opening piece of the present invention. It is not particularly limited, and a cylindrical packaging film that has been conventionally used for individually packaging contents such as processed foods such as sausage, processed cheese, ham, and hamburger in a sealed manner can be used.

That is, examples of packaging films include polyvinylidene chloride resin films, polyester resin films (polyethylene terephthalate film, etc.), polyamide resin films, polyolefin resin films (polypropylene film, etc.), oxygen barrier properties and water vapor barriers. From the viewpoint of properties, a polyvinylidene chloride resin film is preferred. Moreover, as a packaging film, a heat-shrinkable film (uniaxially stretched film or biaxially stretched film) can also be used. Furthermore, laminated films can also be used for increasing the strength of packaging films, improving barrier properties, improving heat resistance, adjusting shrinkage, etc., for example, polyvinylidene chloride resin films and polyethylene terephthalate films. Alternatively, a laminated film with a polypropylene film can be used.

The size of the cylindrical packaging film is not particularly limited and is determined according to the size of the contents to be packaged. Usually, the circumferential length is 15 to 400 mm, and the length is 50 to 300 mm. The circumferential length is 30 to 300 mm and the length is 70 to 250 mm. Widely adopted is the circumferential length 40 to 200 mm and the length 80 to 200 mm. The thickness of the cylindrical packaging film is not particularly limited and can be determined in consideration of the strength and barrier properties of the film according to the contents to be packaged, but is usually 15 to 300 μm, in many cases 25 to 200 μm, Widely adopted is the range of 30 to 150 μm.

[Manufacture of cylindrical packaging film]
The production method of the cylindrical packaging film is not particularly limited, and after manufacturing a sheet-like or cylindrical film by extrusion molding and applying heat-shrinkability as necessary, a predetermined circumference is obtained. A cylindrical packaging film having the following can be formed. When the cylindrical packaging film is a laminated film, the laminated film may be obtained by coextrusion molding or extrusion lamination, or a plurality of films may be adhered by an adhesive such as a urethane adhesive.

The packaging film includes a packaging film that is a non-adherent film that does not adhere to the processed food filled therein, and a packaging film that is an adhesive film that adheres to the processed food filled therein. Either can be used. Since there is no air inside if it is in close contact with the processed food to be filled, from the viewpoint of anti-corruption, a packaging film that is an adhesive film is preferable, but since the adhesion between the packaging film and the processed food is large, the packaging film However, it was difficult to peel off from each food, and in some cases, only the opened piece was peeled off from the packaging film. If the opening piece of the present invention is used, since the opening piece remains attached to the packaging film, only the opening piece is not peeled off from the packaging film, and the opening is wide. The processed food can be smoothly taken out of the food.

2. Opening piece The opening piece of the present invention, which is joined to the outer surface of a cylindrical packaging film for packaging the contents and used to form a package with an opening piece, is not particularly limited, and conventionally, sausage, processed cheese The film material which forms the opening piece used in the package with opening pieces, such as processed foods, such as ham and a hamburger, can be used. That is, examples of the opening piece include a polyvinylidene chloride resin film, a polyester resin film (polyethylene terephthalate film, etc.), a polyamide resin film, a polyolefin resin film (polypropylene film, etc.), and the like. A laminated film can also be used as the opening piece.

As described above, as the opening piece, the same film material as the material for forming the packaging film, particularly the outer surface layer thereof is usually employed in consideration of the bonding property with the cylindrical packaging film. Since a polyvinylidene chloride resin film is preferably used as the material for the cylindrical packaging film, a polyvinylidene chloride resin film is often preferably used as the opening piece. Further, when the opening piece is a laminated film, a polyvinylidene chloride resin film is often used as an outer surface layer to be joined to the packaging film.

The shape and size of the opening piece are not particularly limited, and are selected according to the size of the cylindrical packaging film determined according to the size of the contents to be packaged and the direction in which the opening piece is applied to the cylindrical packaging film. can do. As the shape of the opening piece, a rectangle (including a square), an ellipse (including a circle), a rhombus, a trapezoid, a parallelogram, a star, and other polygonal shapes can be adopted. A rectangular shape is preferably employed from the viewpoints of performance and ease of manufacture. For example, in the case of a rectangular shape, the size of the opening piece is usually in the range of 3 to 100 mm in width and 5 to 300 mm in length, and in many cases in the range of 5 to 70 mm in width and 10 to 200 mm in length. Widely adopted is a range of 7 to 50 mm in width and 15 to 150 mm in length. The thickness of the opening piece is not particularly limited and can be determined in consideration of the bonding property with the packaging film, for example, the weldability, etc., but is usually 15 to 200 μm, in many cases 25 to 150 μm, and is widely used. It is in the range of 30 to 100 μm. The color (hue, saturation, brightness) of the opening piece is not particularly limited, and may be transparent or opaque. Furthermore, you may give printing of the arrow etc. which show an opening direction to an opening piece, for example.

[Manufacture of unsealed pieces]
The production method of the unsealed piece is not particularly limited, but usually, a film-like product is produced by extrusion molding, stretched and heat-set as required, printed as necessary, and then cut into a predetermined shape. Can be obtained by: Before cutting the film-like material, heat treatment is performed to reduce heat shrinkage, and for example, when performing retort heating after filling with sausage, the unsealed pieces can be prevented from being thermally deformed or turned up. When the opening piece is a laminated film, a laminated film may be obtained by coextrusion molding or extrusion lamination, or a plurality of films may be obtained by bonding with an adhesive, for example, a urethane-based adhesive.

3. Joining partThe present invention is an opening piece joined by welding or the like to the outer surface of a cylindrical packaging film for wrapping the contents, the joining part between the cylindrical packaging film and the opening piece, for example, the welding part is the apex, And the strip-shaped part extended in the longitudinal direction of an opening piece from two this vertex is characterized by the above-mentioned. That is, the opening piece of the present invention is, for example, in FIG. 2 (FIG. 2 is a schematic diagram for helping understanding of the aspect of the opening piece and the joint portion of the present invention. The same applies to other drawings). As shown, in a rectangular shaped opening piece, the opening piece is formed with a vertex and a welded part A including two strip-like parts. According to the present invention, in the opened piece, the junction between the cylindrical packaging film and the opened piece includes the apex and the strip-shaped part extending in the longitudinal direction of the opened piece from the two apexes. There is provided the above-described opening piece that can easily and cleanly and stably open a cylindrical packaging film for packaging an object and has a large opening. Further, in most cases, the opened piece can be opened without being detached while it is bonded to the packaging film, and thus the opened piece that is easy to dispose of is provided without scattering of the opened packaging film and the opened piece.

The shape of the joint portion including the apex and the strip-shaped portion extending in the longitudinal direction of the open piece from the two apexes, which characterizes the shape of the joint portion of the opening piece in the present invention, is typically shown in FIG. It means a shape in which a part of the base of the triangle as shown is cut out. In this case, the ratio of the length Y obtained by notching the base to the length X of the base of the triangle virtually formed by the apex and the ends of the two strips is usually 97% or less, 95% or less is preferable, 70% or less is more preferable, and 50% or less is still more preferable. Therefore, the sum (that is, a + b) of the lengths of the end faces of the two strip-shaped portions (hereinafter, sometimes referred to as “width of the strip-shaped portion”), which is a part of the base of the triangle, is the base of the triangle. The length of the bottom side left by cutting out a part of the triangle is generally 3% or more, preferably 5% or more, more preferably 30% or more, and still more preferably 50% with respect to the length X of the base of the triangle. % Or more.

In addition, when a junction part is what is called V shape where the width | variety of two strip-shaped parts is very thin, even if an opening is not obtained even if an opening piece is peeled off, even if an opening is obtained, In the opening process, the opening is not enlarged, and it becomes difficult to finally take out the contents. The width of the two strip-shaped portions being extremely narrow means that the sum (a + b) of the widths of the two strip-shaped portions in the V-shape is usually less than 3%, but the sum of the widths (a + b) If the ratio is less than 2%, the phenomenon described above may become prominent.

〔vertex〕
As long as the joint part in the opening piece of the present invention includes a vertex and a strip-like part extending from the two vertexes in the longitudinal direction of the opening piece, it can further have various shapes. As the shape in the vicinity of the apex, in addition to the one having a protruding tip as shown in FIG. 3, as shown in FIG. 4A, an opening piece in which the apex of the joint is chamfered can be used. In the opened piece in which the apex of the joint portion is chamfered, when forming the joint portion by ultrasonic welding as will be described later, it is possible to avoid joining failure due to the concentration of ultrasonic heating, and clean peeling of the opened piece is possible. It becomes possible.

〔Apex angle〕
In the joint part of the opened piece of the present invention, the angle formed by the two strip-shaped parts at the apex, that is, the apex angle is not particularly limited, but is usually in the range of 10 to 170 degrees. The vertical angle is preferably 40 degrees or more from the viewpoint that the cylindrical packaging film for wrapping the contents can be opened easily and cleanly and stably, and the opening can be made large. The angle is more preferably at least 80 °, more preferably at least 80 °, particularly preferably at least 90 °. The apex angle is not particularly limited, and the cylindrical packaging film for wrapping the contents is opened easily, cleanly, stably and reliably, and the size of the opening piece (specifically, the width). From the viewpoint of restrictions, etc., it is usually 170 degrees or less, often 150 degrees or less, and in most cases 130 degrees or less.

[Various shapes of strips]
The two strip-shaped portions extending in the longitudinal direction of the unsealed piece from the apex of the joint portion in the unsealed piece of the present invention need not have all the side surfaces of the two strip-shaped portions linear, From the viewpoint of easily, cleanly, stably and reliably opening the cylindrical packaging film to be packaged, it is preferable that at least one of the side surfaces of the two strip-shaped portions is linear. Therefore, at the joint portion, at least one of the side surfaces of the two strip-shaped portions may be a convex curve shape or a concave curve shape (not shown). As shown in FIG. 3, all of the side surfaces of the two strip-shaped portions may be linear.

About the joint part in the opening piece of the present invention, the two strip-like parts extending in the longitudinal direction of the opening piece from the apex are often the same in the length of the two strip-like parts. As shown in FIG. 4B, the lengths of the two strip-shaped portions may be different. When the lengths of the two strip-shaped portions are different, it is possible to adjust the shape of the opening by peeling off the unsealed pieces.

Moreover, in the opening piece of the present invention, as shown in FIG. 4C, the joining portion including the apex and the strip-like portion extending from the two apexes in the longitudinal direction of the opening piece is connected to the apex to form a strip. A protrusion extending on the opposite side of the shape portion [the left end portion in FIG. 4C corresponds. ]. The shape and size of the protrusion are not particularly limited and can be selected as appropriate. For example, at least one strip-shaped portion included in the joint portion corresponds to a bent portion (the right end portion in FIG. 4C corresponds to an end portion on the opposite side to the apex. ]. The shape and size of the bent portion, and the manner of bending (can be set such that the end opposite to the apex of the strip-shaped portion is away, or the other portion is bent so that the end approaches). It does not specifically limit and can be selected suitably. When the joint portion in the opened piece of the present invention has the above-described protrusion and / or bent portion, the strength and feel of peeling when the opened piece is peeled off from the package with the opened piece to form the opening, the opening It may be possible to adjust the shape or the like. Furthermore, as the cutout shape of the triangle virtually formed by the apex and the end portions of the two strip-shaped portions in the joint portion of the opening piece of the present invention, a round shape, an elliptical shape, a rectangular shape may be used as desired. Shape (including a square shape), triangle shape, star shape, heart shape or other pattern shape, or a partial shape thereof (for example, a circular partial shape as shown in FIG. 4D or FIG. 4E). With such a shape, the design of the opening formed by peeling the unsealed piece from the package with the unsealed piece can be improved.

Furthermore, in the opening piece of the present invention, the apex and the joint part including the strip-like part extending in the longitudinal direction of the opening piece from the two apexes are in a shape including a fan-shaped part and a triangular part. You can also. The joint portion which is a triangular portion shown in FIG. 5A corresponds to a shape in which a part of the base of the triangle described above as a typical example is cut away, and the cutout portion is eliminated. This corresponds to a shape covering all the strip-shaped portions extending from the apex in the longitudinal direction of the opening piece. The triangle shape of the triangular portion is not particularly limited, and the shape of the opening is clean when it is an isosceles triangle, and the shape of the opening can be controlled when it is a non-isosceles triangle. One or more vertices of the triangle may be chamfered at the joined portion of the triangular portion. Moreover, it is good also as what has a non-joining part (refers to the part which is not joined with a packaging film by welding etc.) as shown in FIG. 5B or 5C in the internal area | region of a triangular-shaped part. The shape and size of the non-joined part can be selected as appropriate. In addition, when a junction part contains a triangle shape, as a result of a joint area becoming comparatively large, since joint strength of an opening piece and the outer surface of a packaging film becomes relatively small, in order to adjust joint strength For example, as will be described later, when the opening piece has a plurality of joints including a vertex and two strips extending in the longitudinal direction of the opening piece from the two vertexes, It can employ | adopt as a shape of one junction part.

[Multiple joints]
If desired, the opening piece of the present invention may have a plurality of joints, and the opening pieces are peeled from the package with the opening pieces by appropriately selecting the number of joints, the mode of the joints, and the like. Thus, options such as the opening direction when forming the opening, the strength and feel of peeling, and the shape and size of the opening can be increased. In particular, the unsealed piece of the present invention has a plurality of joint portions, and two joint portions of the plurality of joint portions have opposite directions extending from the vertices of the two strip-shaped portions in each joint portion. It can be assumed that In this case, when peeling the unsealed piece from the package with the unsealed piece, by selecting one of the directions extending from the top of the two strip-shaped portions at each joint portion of the two joint portions, from either the left or right direction However, the unsealed piece can be easily peeled off. In addition, when the opening piece of the present invention has a plurality of joints exceeding two, for example, three joints or four joints, the direction extending from the apexes of the two strip-shaped parts in each joint is The shape and size of the joint that is not the two joints in the reverse direction can be appropriately selected. For example, when the opening piece of the present invention has four joints, the combination of two joints in which the directions extending from the vertices of the two strip-shaped parts are opposite to each other in the joints are orthogonal to each other. It is also possible to have two sets.

When the opening piece of the present invention has a plurality of joint portions, each shape of the plurality of joint portions, that is, the apex and the strip-like portion extending from the two apexes in the longitudinal direction of the opening piece are included. As the shape, various shapes as described above can be adopted. For example, there are two typical-shaped joints in which the base of the triangle shown in FIG. 3 is cut out so that the directions extending from the vertices of the two strip-shaped parts are opposite in each joint. Can be. Further, at least one of the plurality of joint portions may be a joint portion including a triangular portion, for example, as shown in FIG. 6A, a welded portion A ₁ having a shape in which the base of the triangle is cut off, it can be assumed to have a weld portion a ₂ is a triangular portion. In this case, by adjusting the position and size of the welded portion A ₁ and the welded portion A ₂ , the strength and feel of peeling of the opened piece from the left side and peeling of the opened piece from the right side are adjusted. May be preferable. The plurality of joints are preferably separated from each other as shown in FIG. 6A. However, if desired, the joints may share a base as shown in FIGS. 6B to 6D.

[Sub-joint]
The opening piece of the present invention may further have a sub-joining portion that fixes the opening piece to the outer surface of the cylindrical packaging film, for example, a sub-welding portion. As described above, the sub-joint part is joined to the packaging film by welding or the like with a relatively small joining strength so that deformation or curling of the opened piece does not occur in the retort process or the like. It is the junction part made to do. For example, as shown in FIG. 7A, FIG. 8A and FIG. 8B, a welding portion A (or a plurality of weldings) which is a joint portion including a vertex and a strip-like portion extending from the two vertexes in the longitudinal direction of the opening piece. Sub welds B ₁ and B ₂ (or sub welds B ₁ which are sub joints of the same shape), which are sub joints of different shapes on both sides in the longitudinal direction of the unsealed pieces of the parts A ₁ and A ′ ₁ ) B ′ ₁ ). When the sub welded portions B ₁ and B ₂ (or B ′ ₁ ) are intended to form an opening in the packaging film by grasping and turning the end of the opening piece with a finger, Is easily peeled off at the sub welded portion B ₁ or B ₂ (or B ′ ₁ ), so that a rupture portion is formed on the packaging film starting from the welded portion A (or A ₁ or A ′ ₁ ), An opening can be formed in the packaging film by using the broken portion as a trigger. As described above, the peel strength of the sub-joint portion such as the sub-weld portion is smaller than the peel strength of the joint portion, for example, the weld portion. Further, when the urging opening only from one left or right as shown in FIG. 7A, the peel strength of the sub-weld portion B ₁ in the vertex side, the peel strength of the sub-weld portion B ₂ is less than that at the bottom side It is preferable. The position, shape, size, etc. of the sub-joint portion can be selected as appropriate. Depending on requirements, a round shape (circular shape), a semicircular shape, an elliptical shape, a rectangular shape (including a square shape), a triangular shape, a star shape, a heart shape or other pattern shape, or a partial shape thereof. Thereby, the design of an opening piece can be made favorable. A plurality of sub-joining portions may be provided, and the shape and size of the plurality of sub-joining portions may be the same or different. Further, the position, shape, size, etc. of the joint part and the sub-joint part can be selected in combination as appropriate. For example, various selections as shown in FIGS. 7B and 7C and FIGS. 8B to 8E are possible. It is. When the unsealed piece has a sub-joined portion such as a secondary welded portion on the bottom side of the joint portion such as a welded portion, the length in the width direction of the unsealed piece of the subjoined portion is greater than the length of the bottom side of the joined portion Is preferably small, and it is difficult to prevent expansion of the opening caused by peeling of the joint.

4). Forming method of joint part In the opening piece joined to the outer surface of the cylindrical packaging film for wrapping the contents of the present invention, the apex and the strip-like part extending in the longitudinal direction of the opening piece from the two apexes The method for forming the joining portion between the cylindrical packaging film and the opened piece is not particularly limited, and a method usually employed for joining the opened piece can be adopted. For example, a welding method such as ultrasonic welding, high-frequency welding, and thermal welding, an adhesive method using an adhesive, and the like can be mentioned, and a welding method is preferable, and a commonly used ultrasonic welding method is most preferable. The joining part by the ultrasonic welding method, that is, the formation of the welding part is well known per se. Specifically, the opening piece and the packaging film are placed between the ultrasonic heating horn and the anvil processed into a predetermined shape. Normally, the ultrasonic horn is vibrated ultrasonically in a state where the unsealed pieces are placed on the ultrasonic horn. By setting it in a state, a welded portion is formed. Further, simultaneously with the ultrasonic vibration of the ultrasonic horn, the anvil is heated to promote the melting of the portion where the welded portion is formed, whereby the bonding strength, specifically, the welding strength can be increased. Depending on the size of the area of the welded portion, the voltage and / or current applied to the ultrasonic horn can be changed, or the heating of the anvil can be changed as necessary.

The method for forming the sub-joint portion such as the sub-weld portion can be performed in substantially the same manner as the method for forming the joint portion such as the weld portion. Usually, a sub weld portion having a predetermined shape can be formed at a predetermined position only by ultrasonic welding without performing anvil heating.

5. Packaging Body According to the present invention, there is provided a cylindrical packaging film for packaging contents, and a packaging body with an opening piece including the opening piece joined to the outer surface of the cylindrical packaging film. The combination of the cylindrical packaging film and the opening piece, specifically, the mode of attaching the opening piece to the cylindrical packaging film performed by bonding can be appropriately selected as desired.

[Attachment of opened piece]
The sticking position of the opening piece can be any position in the vicinity of the end in the longitudinal direction of the cylindrical packaging film or in the vicinity of the center in the longitudinal direction. When the position of the opening piece is near the end of the cylindrical packaging film in the longitudinal direction, the end of the packaging film can be easily turned and the contents can be easily taken out. In the case of a film, it is preferable because the contents are hardly adhered. On the other hand, if the opening position of the opening piece is in the vicinity of the central portion in the longitudinal direction of the cylindrical packaging film, the packaging film can be easily peeled off and the contents can be easily taken out because the area of the opening is large. . Moreover, you may stick an opening piece in the several position of a longitudinal direction. In addition, as the vicinity of the end portion in the longitudinal direction of the cylindrical packaging film, a location separated from the position converged by the aluminum wire clip or other means is selected. From the viewpoint of ease of sticking of the opening piece and ease of forming the opening by peeling off the opening piece, the opening piece may be attached in the vicinity of one end in the longitudinal direction of the cylindrical packaging film. preferable.

Regarding the sticking direction of the opening piece, the relationship between the longitudinal direction of the opening piece and the longitudinal direction of the cylindrical packaging film is not particularly limited. For example, it can be set as the package body with an opening piece whose longitudinal direction of an opening piece and the longitudinal direction of a cylindrical packaging film are the same. Further, the longitudinal direction of the opening piece may be different from the longitudinal direction of the cylindrical packaging film. Specifically, the packaging body with the opening piece in which the longitudinal direction of the opening piece and the longitudinal direction of the cylindrical packaging film are orthogonal to each other. Or the package body with an opening piece which is the direction where the longitudinal direction of an opening piece and the longitudinal direction of a cylindrical packaging film incline may be sufficient. From the viewpoint of ease of sticking of the opening piece and ease of formation of the opening by peeling of the opening piece, preferably the opening piece and the cylindrical packaging film have the same longitudinal direction. It is customary to use a packaging body or a packaging body with an opening piece in which the longitudinal direction of the opening piece and the longitudinal direction of the cylindrical packaging film are different. More preferably, the package body with the opening pieces is different in the longitudinal direction of the opening pieces and the longitudinal direction of the cylindrical packaging film.

When a plurality of opening pieces are attached to a cylindrical packaging film, opening pieces having substantially the same shape and size may be attached, and at least one of the shape and / or size is different. An open piece may be attached. Moreover, the opening piece which is substantially the same also about the shape and / or size of joining parts, such as a welding part, may be stuck, and the opening piece from which at least one differs may be stuck. The same applies to the shape and / or size of the sub-joint portion such as the sub-weld portion. Further, the direction of applying the plurality of opening pieces may be applied in the same direction or in different directions, but is preferably applied in the same direction.

Hereinafter, the present invention will be further described with reference to examples and comparative examples, but the present invention is not limited to these examples.

[Example 1]
Outside of a packaging film made of a polyvinylidene chloride resin film in a cylindrical shape filled with fish sausage (opening length: 80 mm, length: 150 mm) using an opening piece made of a polyvinylidene chloride resin film (width: 10 mm, length: 25 mm) The peel test of the open piece of the package with the open piece provided with the open piece joined to the surface by welding was performed. In other words, on the outer surface near the end in the longitudinal direction of the packaging film (positioned about 30 mm away from the end), the longitudinal direction of the opening piece is orthogonal to the longitudinal direction of the packaging film, there welded portion, as shown in FIG. 7A, and the welding portion a formed of two strip-shaped portions of the apex angle of 90 degrees, the auxiliary welding portion B ₁ and rectangular sub welded portion B ₂ of round shape The unsealed piece was welded so as to have, and a package with the unsealed piece was obtained.

Eight test subjects (4 adults, male and female each), about each of the two packages with open pieces, grab the center position of the left end of the open piece with your finger and pull it to the right. The package was opened to a position past the position. With respect to all the packaging bodies, the packaging film was peeled off from the sausage while the opened pieces were joined, and an opening was formed (aperture ratio 100%). When the dimension of the formed opening was measured, the width (longitudinal direction of the packaging film) was 31 mm, and the length (circumferential direction of the packaging film) was 21 mm (average value of 16 pieces). Furthermore, by grasping and pulling the unsealed piece and the peeled packaging film with a finger, the packaging film can be easily peeled off from the sausage along with the unsealed piece all around the sausage. (Opening rate 100%).

[Example 2]
Using the unsealed piece used in Example 1 and the cylindrical packaging film (circumferential length 80 mm length 150 mm) filled with fish sausage, the peel test of the unsealed piece with the unsealed piece was performed as follows. In other words, on the outer surface near the end in the longitudinal direction of the packaging film (positioned about 30 mm away from the end), the longitudinal direction of the opening piece is orthogonal to the longitudinal direction of the packaging film, there welded portion, as shown in FIG. 8E, a bonded portion a ₃ and a ₂ is a junction of a plurality of different shapes, including two strip-shaped portions of the apex angle of 90 degrees, the sub-welded portion B round shape _The opening piece was welded so that it had ₁ and B'1, and the package with an opening piece was obtained.

10 subjects (men adult eight, two adult women), for each five open Katazuki package, generally B ₁ side end near the center or B _'1 side end central opening piece The vicinity was grasped with a finger and pulled rightward or leftward, respectively, and the package was opened to a position past the position of approximately the right end or left end of the opening piece. When opening leftward from the vicinity of the center of the end on the B ′ ₁ side, the opening ratio was 100%, and the dimensions of the formed opening were measured, and the width was 30 mm and the length was 20 mm (50 pieces Average value). In all 50 samples tested, the packaging film could be easily peeled off from the sausage, and the sausage could be completely exposed (opening rate 100%). In addition, 33 pieces out of 50 pieces could be peeled off without the unsealed pieces being detached from the packaging film.

If opened in the right direction from the end portion near the center of the B ₁ side, the aperture ratio is 100% and, when the size of the formed opening was measured, the average width of 10 mm, a length of 11 mm (50 pieces of value). In all 50 samples tested, the packaging film could be easily peeled off from the sausage, and the sausage could be completely exposed (opening rate 100%). Further, 20 pieces out of 50 pieces could be peeled off without the unsealed pieces being detached from the packaging film.

[Comparative example]
Using an opening piece (width 10 mm, length 25 mm) made of a polyvinylidene chloride resin film, as shown in FIG. 10, in addition to the welding portion A of a single weld line (width 2 mm length 15 mm), the opening piece A cylindrical polyvinylidene chloride filled with fish sausage in the same manner as in the example except that the unsealed piece was joined so as to have the sub-welded portion B at the two corners, and a package with the unsealed piece was obtained. The peel test of the unsealed piece of the package with the unsealed piece provided with the unsealed piece joined to the outer surface of the packaging film made of a plastic resin film was performed. Grabbing the center position of the left end of the opened piece with your finger, pulling it to the right, and opening the package to a position that almost passes the position of the right end of the opened piece. The film was peeled off and detached, and an opening was formed in the packaging film (opening ratio 100%). The openings were rectangular with a width of 2 mm and a length of 12 mm (average value of 16). Since the opening is small and the sausage is not exposed, the sausage could be completely exposed by inserting a nail into the opening of the packaging film and picking it with a finger to peel off the packaging film. There were two sausages attached to.

The present invention is an opening piece bonded to the outer surface of a cylindrical packaging film for wrapping the contents, wherein the junction between the cylindrical packaging film and the opening piece is an apex, and the two apexes The above-mentioned opening piece includes a strip-like portion extending in the longitudinal direction of the opening piece, so that the cylindrical packaging film for packaging the contents can be opened easily, cleanly and stably. Since the opening piece bonded to the outer surface of the cylindrical packaging film having a large opening can be provided, the industrial applicability is high.

In addition, the present invention wraps the contents by being a packaging body with an opening piece provided with a cylindrical packaging film for packaging the contents and the opening piece joined to the outer surface of the cylindrical packaging film. The cylindrical packaging film to be opened can be opened easily, cleanly and stably, and a package with an opening piece having a large opening can be provided, so that the industrial applicability is high.

1: Cylindrical packaging film 2: Aluminum wire clip 3: Opening piece A, A ₁ , A ' ₁ , A ₂ , A' ₂ , A ₃ : Joint part (welding part)
B, B ₁ , B ′ ₁ , B ₂ : Sub-joint part (sub-weld part)
a, b: width of the strip-shaped part (a part of the base of the triangle)
X: length of the base of the triangle Y: length of the base notched

Claims

An unsealed piece joined to the outer surface of a cylindrical packaging film that wraps the contents,
The said opening piece characterized by the junction part of a cylindrical packaging film and an opening piece including the strip shape part extended in the longitudinal direction of an opening piece from a vertex and two said vertexes.
The opening piece according to claim 1, wherein the apex of the joint is chamfered.
The opening piece according to claim 1 or 2, wherein the angle formed by the two strips at the apex is 10 to 170 degrees.
The opening piece according to any one of claims 1 to 3, wherein at least one of the side surfaces of the two strip-shaped portions is linear.
The opening piece according to any one of claims 1 to 3, wherein at least one of the side surfaces of the two strip-shaped portions is a convex curve shape or a concave curve shape.
The opening piece according to any one of claims 1 to 5, wherein the two strip-shaped portions have the same length.
The opening piece according to any one of claims 1 to 5, wherein the lengths of the two strip portions are different.
The opening piece according to any one of claims 1 to 7, wherein the joint portion includes a triangular portion.
The opening piece according to claim 8, which has a non-joining portion in an inner region of the triangular portion.
The unsealing piece according to any one of claims 1 to 9, wherein the joining portion includes a protrusion that is continuous with the apex and extends to the opposite side of the strip-shaped portion.
The opening piece according to any one of claims 1 to 10, wherein the at least one strip-shaped portion has a bent portion at an end portion on a side opposite to the apex.
12. The device according to claim 1, comprising a plurality of joint portions, wherein two joint portions of the plurality of joint portions have opposite directions extending from the vertices of the two strip-shaped portions in each joint portion. The opening piece of Claim 1.
The opening piece according to claim 12, wherein at least one of the plurality of joint portions is a joint portion including a triangular portion.
Furthermore, the opening piece of any one of Claim 1 thru | or 13 which has a subjoining part which fixes an opening piece to the outer surface of a cylindrical packaging film.
The opening piece according to claim 14, wherein the sub-joining portion is a sub-welding portion.
The opening piece according to any one of claims 1 to 15, wherein the joining portion is a welded portion.
A cylindrical packaging film for packaging the contents, and a package with an opened piece comprising the opened piece according to any one of claims 1 to 16, joined to the outer surface of the cylindrical packaging film.
18. A package with an opening piece according to claim 17, wherein the longitudinal direction of the opening piece is different from the longitudinal direction of the cylindrical packaging film.
The package with an opening piece according to claim 18, wherein the longitudinal direction of the opening piece and the longitudinal direction of the cylindrical packaging film are orthogonal to each other.
18. The package with an opening piece according to claim 17, wherein the longitudinal direction of the opening piece is the same as the longitudinal direction of the cylindrical packaging film.