JP2004106876A - Method of manufacturing packaging sheet material, packaging sheet manufactured by the method, and package made of the packaging sheet material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a packaging sheet material wherein a package with a packaged object wrapped can be simply unsealed. <P>SOLUTION: The manufacturing method of the packaging sheet material includes: a step of supplying a sheet material; a step of sticking pull tabs at predetermined intervals to the surface of the supplied sheet material; and a step of making a cut extending from the surface of the pull tab to the sheet material. The pull tab has a non-adhesive portion on at least part of its periphery, and has a mark indicating the position of the non-adhesive portion applied on the surface. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a sheet material for packaging, a sheet for packaging produced by this method, and a package produced by processing the sheet material, and more particularly, to opening a package when an article to be packaged is packaged. The present invention relates to a method for easily producing a packaging sheet material, a sheet produced by the production method, and a package such as a packaging bag produced by processing the sheet material.
[0002]
[Prior art]
There are various forms of packaging for various food products handled in supermarkets, convenience stores, prepared food stores, lunch boxes, etc., and these various food products are put in containers such as plastic trays and wrapped around with wrap film. Many are displayed and sold in the form. In addition, many products wrapped using a covering film other than the wrap film are on the market. For example, cassette tapes, video tapes, MDs, CDs and the like are also packaged and displayed and sold with a covering film.
[0003]
Furthermore, packed juices, etc., are bundled in a shallow cardboard box without a lid enough to store the lower half of the pack by packing together about 12 to 20 bottles, and these packed juice and the entire cardboard box are shrink-filmed. Shipped in packaged form. This shrink film is made of a material having high strength, for example, a material such as polypropylene, polyethylene or vinyl chloride, so as not to be damaged or cracked by an impact during transportation.
[0004]
When the packaged product is opened, for example, in the case of an article wrapped with a wrap film, the overlap portion between the wrap film edges is searched to find the edge portion of the wrap film, and this portion is picked by a finger. To remove the wrap film. When it is difficult to find the peripheral portion of the wrap film, a cut is made in a part of the wrap film using a knife or the like, and the lap film is cut open by widening the cut portion.
[0005]
Also, when opening a package such as a juice containing a pack, it is impossible to tear the shrink film with the force of pulling with the left and right fingertips, so the upper surface of the shrink film is cut open using a cutter knife or the like. . However, during the cutting operation of the shrink film, the pack may be cut by mistake with the cutting edge of the cutter knife, or the packaged product may be damaged by touching the packaged product.
[0006]
In order to solve such a problem, the present applicant has disclosed in Patent Document 1 below a coating film opening structure that can be easily opened without using a blade or the like. FIG. 10 shows this covering film opening structure, in which a packaged object 11 put in a plastic tray 10 is covered with a wrap film 12 which is a kind of a covering film, and a part of the surface of the wrap film 12 is A substantially quadrangular tension piece 13 is adhered, and pinholes 13a and 12a are formed as penetrating portions penetrating both the tension piece 13 and the wrap film 12. A non-sticking portion 13b that does not adhere to the wrap film 12 is formed on a part of the periphery of the tension piece 13, and a mark 13c indicating the position of the non-sticking portion 13b is drawn on the surface of the tension piece 13.
[0007]
When unwrapping the wrap film packaged article 15, as shown in FIG. 11A, the non-sticking portion 13b of the tension piece 13 indicated by the mark 13c is picked up by a finger and peeled off from the wrap film 12. When the tension pieces 13 are peeled off the positions of the pinholes 13a, 12a, the pinholes 12a become a source of cuts in the wrap film 12, and as shown in FIG. A part is pulled while being attached to the tension piece 13.
[0008]
In this way, the wrap film 12 is cut off with a certain width in accordance with the pulling operation of the tension piece 13, and the wrap film 12 can be cut open. Therefore, it is possible to easily open the wrap film packaged article 15 without using a blade or the like, making a cut in the wrap film by raising a fingernail, or forcibly pulling the wrap film with both hands.
[Patent Document 1]
JP 2001-322614 A
[Problems to be solved by the invention]
According to this opening structure, the article to be packaged 11 placed in the plastic tray 10 is covered with the wrap film 12, and the tension piece 13 is attached to an appropriate position on the surface of the wrap film 12. , The opening structure can be formed only by perforating the pinholes 13a and 12a penetrating the tension piece 13 and the wrap film 12, which is extremely simple.
[0010]
However, after covering the article to be packaged 11 with the wrap film 12 and attaching the tension piece 13 to an appropriate position on the surface of the wrap film 12, use a pointed tool to attach the tension piece 13 and the wrap film 12. Since the pinholes 13a and 12a are pierced, the tip of the tool may reach the packaged object 11 at the time of piercing and damage the packaged object 11 in some cases. On the other hand, it was extremely difficult to pierce the laminate of the tension piece 13 and the wrap film 12 with a tool to form a pinhole of a predetermined size without damaging the packaged object 11.
[0011]
Therefore, the present invention has been made in order to solve such a problem, and an object of the present invention is to provide a method for manufacturing a sheet material for packaging in which the package is easily opened when the object to be packaged is packaged. It is in.
[0012]
It is another object of the present invention to provide a packaging sheet produced by this method.
[0013]
Still another object of the present invention is to provide a package such as a packaging bag made by processing a packaging sheet material similarly produced by this method.
[0014]
[Means for Solving the Problems]
The object of the invention can be achieved by the following means. That is, the manufacturing method of the packaging sheet material of the present invention includes a step of supplying the sheet material, a step of attaching tension pieces to the surface of the supplied sheet material at predetermined intervals, and a step of applying the sheet from the surface of the tension piece. And making a notch leading to the material.
[0015]
In the component, the tension piece preferably has a non-adhesive portion on at least a part of a peripheral edge. Further, it is preferable that a mark indicating the position of the non-adhesive portion is provided on the surface of the tension piece.
[0016]
According to this manufacturing method, a tension piece is attached to a packaging sheet material, and a cut portion is formed in advance in the attached portion. Therefore, even if the packaging material is wrapped using this sheet material, Will not be damaged.
[0017]
Further, it is preferable that the cut portion of the tension piece is sealed. By closing the cut portion, when the article to be packaged is wrapped, water, bacteria, and the like do not enter the cut portion.
[0018]
Further, the packaging sheet of the present invention is characterized in that the packaging sheet material produced by the above-described manufacturing method is cut to a predetermined length and formed.
[0019]
Further, the package of the present invention is characterized in that it is produced by processing a packaging sheet material produced by the above-mentioned production method.
[0020]
Since the packaging sheet and the package of the present invention have an opening structure formed in advance, the packaging object is not damaged when packaging the object.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the form described in the drawings, and various modifications are possible within the scope described in the claims, and it goes without saying that they are also included in the scope of the present invention. No.
[0022]
1A and 1B show a manufacturing method of a sheet material for packaging according to a first embodiment of the present invention, wherein FIG. 1A is a schematic explanatory view of main steps, and FIG. It is explanatory drawing shown in simulation. FIG. 2 is a plan view showing the raw material supplied to the manufacturing process of FIG. 1 and the completed packaging sheet material.
[0023]
The sheet material 31 is made of a plastic film having a predetermined thickness, width and length, as shown in FIG. The specifications of the sheet material, that is, the film material, its thickness, width and length are selected according to the final product formed using this sheet material. If the application is, for example, a wrap film for packaging food, etc., it is already marketed and wrapped to the size used at home and also for cassette tapes, video tapes, MDs, CDs, packed juices and whole cardboard boxes. In the case of a shrink film, the size, thickness, and the like are determined according to the size of each packaged product.
[0024]
As a material of the sheet material, a plastic film, for example, OPP, CPP, HDPE, LDPE, LLDPE, other special plastic films, various laminated films, and the like are used.
[0025]
Further, the tensile sheet material 41 is cut at a predetermined length and affixed to the surface of the packaging sheet material 31 at predetermined intervals, and as shown in FIG. A sheet material having a narrow width and made of a plastic film, a piece of paper, or the like. When a plastic film is used, it may be transparent, translucent or opaque.
[0026]
The tensile sheet material 41 is sectioned at predetermined intervals in the longitudinal direction, and this portion is later cut from this portion to form tensile pieces 41A to 41X. Each of the tensile pieces 41A to 41X has a non-adhesive portion 41a that is not adhered to another film and an adhesive portion 41a ′ to which an adhesive 42 is applied on the back surface, and the non-adhesive portions 41a to 41x and the adhesive portions 41a ′ to 41x ′ are alternately and continuously arranged on the sheet material 41. In addition, a mark indicating the position of the non-bonded portion is printed on the surface of the tensile sheet material 41.
[0027]
With reference to Drawing 1 and Drawing 2, the manufacturing method of the sheet material for packing of a 1st embodiment is explained. In the tensile piece attaching step 50, the sheet material 31 is supplied from the sheet material supplying step 30 and the tensile sheet material 41 is supplied from the sheet material supplying step 40. The supplied tensile sheet material 41 is cut at the end of the bonding portion in a tensile piece attaching step 50 and attached to the surface of the packaging sheet material 31. The attachment of the adhesive portion to the sheet material and the cutting of the final end of the adhesive portion are sequentially and continuously performed. The place where the tension piece is attached to the packaging sheet material 31 is arbitrarily selected according to the use of the tension piece attachment sheet material, and is applied to a place where the packaging material is easily opened when the article to be packaged is packed. . FIG. 3 is an enlarged view of a portion to which the tension piece 41A is attached.
[0028]
Next, in a cutting step 60, a through-hole or a predetermined-shaped cut is formed through the surface of the tensile piece and the packaging sheet material. This cut shape may be arbitrary. This shape is, for example, as shown in FIGS. 4A to 4E, an arc shape, a thigh shape, a triangular shape, a shape combining a curve and a straight line, or a cross shape in which a straight line crosses a cross. Either may be used. For this cut, an optimum cut shape is selected in consideration of the material, thickness, strength, crack direction, etc. of the sheet material, or the opening workability suitable for the type and use of the packaged object.
[0029]
As shown in FIG. 2 (C), the cut sheet material has tensile pieces 41A to 41X attached to the surface of the sheet material 31 at predetermined intervals. This sheet material is cut into a predetermined length in a product process 70 to form a packaging sheet 71a. In addition, although the tensile piece shown in FIG. 2 (B) has an array of non-adhesive portions and adhesive portions sequentially in the longitudinal direction of the sheet material, it is cut at the final end of the adhesive portion and attached to the sheet material for packaging. At this time, it may be attached in a longitudinal direction, a direction orthogonal to the longitudinal direction, or further, in an oblique direction. This sticking direction is selected depending on the use of the tensile strip-attached sheet material.
[0030]
Since the packaging sheet material has minute gaps on the front and back surfaces of the sheet material at the cut portions, when an article to be packaged, such as food, is wrapped, water, bacteria, and the like enter through the minute gaps. Foods and the like may be spoiled. FIG. 5 shows a method of manufacturing a packaging sheet material in which this point is improved and the gap between the cut portions is closed.
[0031]
The difference between the method of manufacturing the packaging sheet material and the manufacturing method of FIG. 1 is that a sealing material is attached to the surface of the tension piece to cover the cut portion. This sealing material is a sealing sheet material 66 slightly narrower than the tensile sheet material, and is made of a film of the same material as the tensile sheet material 41. As shown in FIG. 6C, adhesives 66 a to 66 x are applied to the back surface of the sealing sheet material 66 at predetermined intervals or continuously.
[0032]
In the sealing step 67, the sealing sheet material 66 is supplied from the sealing material supply step 65. The supplied sealing sheet material 66 is cut into a predetermined length in this sealing material supply step 67, and each of the sealing materials 66A to 66X is attached to a cut portion formed in a tensile piece, and a gap between the cut portions is formed. Seal. Reference numeral 71b denotes a sheet material produced by this manufacturing method. The other steps are the same as those in the manufacturing method shown in FIG. FIG. 7 is an enlarged view showing a portion to which the tensile piece and the sealing material are attached.
[0033]
In this manufacturing method, the sealing material is stuck to the tensile piece. However, without using the sealing material, the sealing may be performed by applying heat or the like to the cut portion formed in the tensile piece and welding. Good.
[0034]
Various wrapping sheets or packages are manufactured using the wrapping sheet material manufactured by the above method. FIG. 8 shows an example of a packaging sheet manufactured by the manufacturing steps of FIGS. 1 and 5. This packaging sheet is selected according to the final product to be used. If the application is, for example, a wrap film for packaging food, etc., it is already marketed and wrapped to the size used at home and also for cassette tapes, video tapes, MDs, CDs, packed juices and whole cardboard boxes. In the case of a shrink film, a film having a predetermined size and thickness is selected according to the size of each packaged product.
[0035]
FIG. 9 is a plan view illustrating a bag body manufactured using a sheet material for packaging. In FIG. 9, a bag of a different type, a bag 80 in FIG. 9A has a closed bag mouth, and a bag 81 in FIG. It has an opening that can be hung, and in each case, a tension piece 41A is attached near the mouth of the bag. In addition, since the manufacturing method and manufacturing apparatus of a bag body etc. are already publicly known, description will be omitted.
[0036]
The method of opening the above-mentioned wrapping sheet and the package is the same as the opening method shown in FIGS. That is, the non-sticking portion of the pulling piece is picked up by a finger, pulled in the direction of the arrow in the drawing, and peeled off from the packaging film. When the tensile piece is peeled off from the position of the cut, the cut is each a source of a break in the packaging film, and a part of the packaging film around the cut is pulled while being attached to the tensile piece. In this way, the packaging film is torn with a certain width as the tension piece is pulled, and the packaging film can be easily cut open.
[0037]
【The invention's effect】
As described above, according to the present invention, the tensile piece is attached to the packaging sheet material, and the cut portion is formed in advance in the attached portion, so that the object to be packaged is wrapped using the sheet material. Even if it does, the packaged item will not be damaged. Further, in another embodiment of the present invention, since the cut portion is closed, water, bacteria, and the like do not enter the cut portion when the packaged product is wrapped.
[0038]
Furthermore, since the package sheet and the package of the present invention have an opening structure formed in advance, the packaged object is not damaged when the packaged item is packaged.
[Brief description of the drawings]
FIG. 1 shows a method for producing a packaging sheet material according to a first embodiment of the present invention. FIG. 1A schematically illustrates a main step, and FIG. 1B schematically shows a material in the main step. FIG.
FIGS. 2A and 2B are diagrams showing a raw material supplied to the manufacturing process in FIG. 1 and a completed packaging sheet material, wherein FIG. 2A shows a sheet material, FIG. 2B shows a tensile sheet material, and FIG. 2 shows the attached sheet material.
FIG. 3 is a partially enlarged view of FIG. 2 (C).
FIG. 4 is a plan view showing another embodiment of the cut portion of FIG. 1;
5A and 5B show a method for manufacturing a packaging sheet material according to a second embodiment of the present invention, wherein FIG. 5A is a schematic explanatory view of main steps, and FIG. FIG.
6A and 6B are diagrams showing a material supplied to the manufacturing process in FIG. 5 and a completed packaging sheet material, wherein FIG. 6A is a sheet material, FIG. 6B is a tensile sheet material, and FIG. (D) shows a sheet material to which a tensile piece and a sealing material are attached.
FIG. 7 is a partially enlarged view of FIG. 6 (D).
FIG. 8 is an external perspective view showing a packaging sheet material manufactured using the packaging sheet material manufactured by the manufacturing method according to the first and second embodiments of the present invention.
FIG. 9 is a plan view illustrating a bag body manufactured using the packaging sheet material manufactured by the manufacturing method according to the first and second embodiments of the present invention.
FIG. 10 is a plan view showing a conventional opening structure.
11 is a view showing a state in which the wrapped film package of FIG. 10 is being opened.
[Explanation of symbols]
31 Sheet materials 41A to 41X Tensile pieces 41a to 41x Non-adhesive parts 41a 'to 41x' Adhesive parts 42 Adhesive materials 43 Cut parts 66A to 66X Sealing materials

Claims (6)

Supplying the sheet material;
A step of attaching tension pieces to the surface of the supplied sheet material at predetermined intervals,
A step of making a cut from the surface of the tension piece to the sheet material,
A method for producing a packaging sheet material, comprising: The method for manufacturing a packaging sheet material according to claim 1, wherein the tensile piece has a non-adhesive portion on at least a part of a periphery thereof. The method for manufacturing a sheet material according to claim 2, wherein a mark indicating a position of a non-adhesive portion is provided on a surface of the tension piece. The method for manufacturing a packaging sheet material according to any one of claims 1 to 3, wherein the cut portion of the tension piece is sealed. A packaging sheet formed by cutting the packaging sheet material produced by the method according to claim 1 into a predetermined length. A package body produced by processing a packaging sheet material produced by the production method according to claim 1.

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