JP2020070058A - Package by vinylidene chloride resin film - Google Patents

Abstract

To provide a package by a vinylidene chloride resin film with which a cylindrical film can be more reliably and easily opened.SOLUTION: A package comprises: a cylindrical film formed by making a vinylidene chloride resin film into a cylindrical shape; contents filled into the cylindrical film; and a ligating member which ligates both ends into which the cylindrical film filled contents is bundled and forms a ligation end, wherein the cylindrical film is formed with an envelope weaving with at least two deposition lines. Furthermore, the package has cuts and/or small holes for opening on an edge piece of the film protruding in a belt-like shape on the outside of the package.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vinylidene chloride resin film package, and more particularly to a package that can easily and reliably open a tubular film.

  A package in which a processed food represented by sausage or processed cheese is hermetically sealed is generally manufactured by filling a tubular film (casing) with the contents and bundling and ligating both ends. In order to facilitate the unsealing of the film of such a rocket package, it is possible to open the film on the edge (ear) of the film that protrudes in a strip shape on the outside of the package when forming the film into a tubular shape. A method of providing cuts and small holes is known. Such a package is a product in which the cut film or the small hole is used as a trigger to make a slit in the film and pull the film to break the packaging film beyond the welding line of the film, and there are various forms. ..

  Patent Document 1 describes "a vinylidene chloride-based resin film having a tubular solid content having a spine-attached seal portion extending along a cylinder axis and ligating portions having both ends of the cylinder focused by metal rings. In a tubular sealed package that is hermetically packaged with, a film ear piece that sticks out to the outside of the package through the spine-attached seal line and has a sensation of 1.5 mm to 3 mm from the side edge of the film ear piece. In the central portion, a hole having a minute area or a cut line penetrating the film layer is arranged with a direction crossing the long axis of the ear piece, and a large number are arranged at intervals in the long axis direction of the ear piece. "Easy-to-open tubular sealed package packaged with vinylidene chloride-based resin film."

  Patent Document 2 describes a "tube in which both side edges of a band-shaped vinylidene chloride-based resin film are overlapped with each other, and the overlapped portion is heat-sealed with a predetermined width over the longitudinal direction of the film to form a seal portion. -Shaped film, a sealing member for sealing both ends of the tubular film filled with contents, one side edge portion of the vinylidene chloride-based resin film in a belt-like shape outside the tubular film. At least one of the two contact surfaces of the vinylidene chloride-based resin film forming the overlapped portion is lined with a plurality of non-penetrating holes or cuts in a hermetically sealed package including the protruding film outer ear piece. A plurality of rows of scar groups formed as described above, and the scar groups are provided so as to cross the seal portion beyond the width of the seal portion. Body. "Is disclosed.

  Patent Literature 3 describes "filled packaging in which contents are filled and sealed in a tubular resin film having a vertical seal portion having an outer ear portion extending in the longitudinal direction and having both longitudinal end portions converged. The body, the tubular resin film is formed from a polyvinylidene chloride resin, or formed from a polyvinylidene chloride resin and ethylene-vinyl acetate copolymer, in the tubular resin film, The amount of the ethylene-vinyl acetate copolymer is 5 parts by mass or less with respect to 100 parts by mass of the polyvinylidene chloride resin, and the vertical seal part having the outer ear part extending in the longitudinal direction is formed by high frequency induction heating. And a T-type peel strength of 23 N or less and a shear peel strength of 40 N or more. ”Is disclosed.

  Patent Document 4 describes "a film packaging body in which a tubular packaging tube is formed of a film, processed foods are filled in the tubular packaging tube, and both longitudinal ends of the packaging tube are closed. In, the one edge piece of the film formed in a tubular shape is folded back in the outer surface direction of the packaging tube, and the edge piece of the other film is overlaid on the outside of the edge piece of the one film, and Two film edge pieces and the film forming the packaging tube are welded together by a welding line at a position where the folded portion between the film forming the packaging tube and one film edge piece is left. A tubular film package filled with a processed food characterized in that it is disclosed. "

JP-A-63-12471 Japanese Patent No. 5385110 Japanese Patent No. 6285212 Japanese Patent Publication No. 6-41312

Packing bodies such as fish sausages have been used widely for many years because they are resistant to retort and can be stored for a long time, but the stronger the film and the tighter the sealing, the more necessary the cutter and scissors when opening. There was a problem. There are used a method in which a line of cuts and small holes is provided in a film and used as a trigger to open the film, or a method in which an opening piece is adhered and a tear generated by pulling the film is used as a trigger to open the film. Even so, it wasn't easy for anyone to open. In particular, in a package using a vinylidene chloride-based resin film, if it is welded so as to have sufficient retort resistance, it is difficult to open it because the film itself and the welded part are strong.
Patent Document 3 discloses an invention in which the retort resistance and the easy-opening property are made compatible by adjusting the T-type peel strength and the shear peel strength of the vinylidene chloride-based resin film welding to a proper range. .. However, for a method of adjusting the T-type peel strength and the shear peel strength to a proper range, see Paragraph 0062, “Adjusting one or both of current or voltage for applying high-frequency power or applying a high-frequency part. It can be easily performed by adjusting. ”, But does not disclose a specific method. Since the T-type peel strength and the shear peel strength of one weld line are correlated, it is unknown how only one of them can be weakened or strengthened by adjusting the high frequency power. Even if fine adjustment of pinpoint is possible, the method requiring fine adjustment lacks reproducibility and stability in mass production.
An object of the present invention is to provide a packaging body that can more surely and easily open a packaging body using a vinylidene chloride resin film.

  The present inventors have examined the method of opening the package by providing cuts and / or small holes for opening on the edge piece (ear) of the vinylidene chloride-based resin film, and found that the film is formed by the cuts and small holes. It has been found that, even if it can be torn, in the case of a vinylidene chloride-based resin film, the welding line is so strong that the tear does not extend beyond the welding line until the package is opened. We tried various changes to the welding strength of the welding line, but if the welding was weak enough to allow the crevice to exceed the welding line, the retort resistance would be insufficient. It seemed difficult to adopt a method of tearing the film with cuts and small holes using a vinylidene chloride resin film, but by using a combination of thin welding lines instead of a single welding line, retort It has been found that the strength for tearing each welding line can be reduced while maintaining the resistance.

The gist of the present invention is the following packages (1) to (7).
(1) A tubular film in which a vinylidene chloride resin film is formed into a tubular shape by vertical sealing;
Contents filled in the tubular film;
A ligation member for ligating both ends of the tubular film, which is filled with the contents, to form a ligation end;
The vertical seal is formed of at least two weld lines;
Packaging.
(2) The package according to (1), which further has a slit and / or a small hole for opening in the edge piece of the film protruding in a strip shape on the outside of the package by the vertical seal.
(3) The package according to (1) or (2), wherein the line width of each of the at least two welding lines is independently 10 to 1,000 μm.
(4) The package according to any one of (1) to (3), wherein the at least two welding lines are adjacent to each other at an interval of 50 to 5,000 μm.
(5) The method for producing a package according to any one of (1) to (5), which comprises welding by a high frequency dielectric heating method.
(6) The package according to any one of (1) to (4), wherein the tubular film is formed by envelope encasing or joint-sealing.
(7) The package according to any one of (1) to (6), wherein the content is a food containing condensed meat.

  With the configuration of the present invention, it is possible to provide a package in which the package using the vinylidene chloride resin film can be easily opened.

It is a figure explaining the package which concerns on embodiment of this invention. (A) is an overall front view, (b) is a partially enlarged view showing the periphery of one ligation end side, and (c) is a sectional view perpendicular to the axis of the package. FIG. 4 is a cross-sectional view perpendicular to the axis of the packaging body in the case where vertical sealing is performed by jointing. It is an enlarged photograph of an electrode for a vertical seal. It is an enlarged photograph of the cross section of the film vertically sealed with one welding line. It is an enlarged photograph of the cross section of the film vertically sealed with two weldability. It is the figure which showed the position grasped when measuring the shear strength of the vertical seal of a package. It is the figure which showed the position grasped when measuring the notch breaking strength of the vertical seal of a package. FIG. 3 is a schematic view showing a state in which the side opposite to the vertical seal of the tubular film is cut open to form a flat surface, and a cut is made in an ear portion 7.

  In the package of the present invention, the content 9 (see, for example, FIG. 1) may be a kneaded product raw material or a sausage raw material whose main raw material is kneaded meat. The ground meat is typically pasty, sol-like before heating, and gel-like by heating. Specifically, the contents can be fish sausage using kneaded meat, meat sausage, kamaboko, ham, hamburger, cheese and the like.

  First, with reference to FIG. 1, a package 1 according to an embodiment of the present invention will be described. 1A and 1B are views for explaining the packaging body 1. FIG. 1A is an overall front view seen from the side of the vertical seal, and FIG. FIG. 1C is a sectional view perpendicular to the axis of the package 1. The package 1 includes a tubular film 5 in which a synthetic resin film is tubularly formed, a content 9 filled in the tubular film 5, and both ends of the tubular film 5 filled with the content 9. It is provided with a ligating member 6 for ligating and a small hole 11 continuous with an edge piece (ear part) 7 of the film protruding in a band shape on the outside of the package by a vertical seal.

  The tubular film 5 is formed by winding a belt-shaped synthetic resin film in a tubular shape, overlapping both sides extending in the longitudinal direction, and welding the overlapped portions along the longitudinal direction (vertical seal 10). It is formed by. The strip-shaped synthetic resin film forming the tubular film 5 is preferably made of vinylidene chloride-based resin for heat welding. As the vinylidene chloride resin, vinylidene chloride-vinyl chloride copolymer, vinylidene chloride-methyl methacrylate copolymer, or vinylidene chloride-vinyl chloride-vinyl acetate copolymer can be preferably used, particularly preferably vinylidene chloride A vinyl chloride copolymer. It is also possible to use a polymer in which other resins are mixed as long as the properties of the vinylidene chloride resin are not impaired.

  The both sides of the strip-shaped film may be stacked on each other by either envelope sticking in which the front and back sides of the film are in contact with each other or joint sticking in which any one of the front and back sides of the film is in contact with each other. It is attached (see FIG. 1C). In the envelope tensioning, the film overlaps with two sheets, whereas in the gassho tensioning (Fig. 2), there is a folded film edge, so the overlap becomes three sheets, which requires somewhat strong welding.

  In the present embodiment, the content 9 is preferably fish meat paste that is edible fish meat (raw material for fish meat paste and fish sausage), but may be animal meat paste. .. Grated fish meat is typically in the form of paste at first, in the form of sol before heating, and in the form of gel when heated. The difference between the fish meat paste product and the fish meat sausage is due to the difference in the manufacturing method. A fish meat paste product, which is typically a kamaboko or bamboo shoot, is manufactured by adding salt to the fish meat paste and salting it, followed by a sitting step of keeping at 20 ° C to 40 ° C for about 10 minutes to 20 hours. On the other hand, the fish sausage has a large blending ratio of starch, fats and oils as the blending specification of the ground meat, and is produced through a heating process without a sitting process. The difference in properties between the fish meat paste product and the fish meat sausage produced in this way is typically due to their elastic properties. The fish meat paste product has relatively large elasticity and the fish meat sausage has relatively small elasticity. Since the content 9 is in a sol state when it is filled in the tubular film 5, it is possible to avoid blocking the flow path of the content 9 when filling the tubular film 5 with the content 9. This makes it easy to fill the tubular film 5 with the contents 9. Further, the content 9 may be one that can be dried, boiled, or cooked as a preserved food.

The ligation member 6 is formed by stacking and fusing synthetic resin tapes. In the present embodiment, the ends of the tubular film 5 filled with the contents 9 are bundled (focused), the bundled portions are sandwiched by the synthetic resin tapes from both sides, and the bundled portions are welded together with the synthetic resin tapes. It is composed of The synthetic resin tape is preferably a vinylidene chloride-based resin, similar to the material of the strip-shaped film forming the tubular film 5, and the vinylidene chloride-based resin is a vinylidene chloride-vinyl chloride copolymer or chloride. A vinylidene-methyl methacrylate copolymer or a vinylidene chloride-vinyl chloride-vinyl acetate copolymer can be preferably used, and a vinylidene chloride-vinyl chloride copolymer is particularly preferable.
The bundled portions of the tubular films 5 may be directly welded and ligated without using a synthetic resin tape. In this case, the fused portion becomes the ligation member 6 and the root of the fused portion is ligated. It is the base of the member 6. By ligating both ends of the tubular film 5 filled with the content 9 with the ligature member 6, ligated end portions 5E are formed at both ends of the tubular film 5. The tubular film 5 filled with the content 9 is ligated by the ligating member 6 with a sealing property such that the content 9 does not leak even when the manufactured package 1 is boiled. The ligation member 6 may be an aluminum wire clip or the like.

The vertical seal 10 is formed by a method such as high frequency induction heating, ultrasonic heating, laser heating, welding by resistance heating or the like, or adhesion by an adhesive.
In the present invention, the vertical seal is welded with at least two welding lines, which was conventionally performed with one welding line. Although any method may be used, for example, only by changing the electrode used for high-frequency dielectric heating to the shape shown in FIG. 3, two welding lines can be formed. FIG. 4 shows a photograph of a cross section of the film welded with one electrode, and FIG. 5 shows a photograph of the film welded with two welding lines. It can be seen that the thickness of the welded portion is reduced by using a thin welded line. In the case of the single weld line in FIG. 4, due to the thickness of the weld portion, even if a tear can be made in the film from the cut provided in the ear portion, the film cannot be opened beyond the weld portion. On the other hand, in FIG. 5, since the welding line is thin, the thickness of the welding portion is also thin, which facilitates the opening of the film.
By setting the number of welding lines to be plural, it is possible to reduce the force at which the tear of the film exceeds the welding line while maintaining the shear strength (retort resistance). The number of welding lines can be set to 2 to 10 if necessary. 2-5, 2-3 are preferable. The plurality of welding lines may be formed by one electrode like the electrode of FIG. 3, or may be formed by arranging the plurality of electrodes while shifting them. It is preferable to form one electrode because the welding lines do not shift or overlap.
The plurality of welding lines may have the same thickness or different thicknesses, and the intervals between the welding lines need not be constant.
Specifically, it is suitable that the line width of each welding line is independently 10 to 1,000 μm. The thickness is preferably 50 to 500 μm, 100 to 500 μm, and 100 to 300 μm.
It is necessary that the welding lines be spaced so that the thickness of the welded portion of the film does not increase due to mutual welding. It is preferable to provide an interval of at least the width of the welding line. To maintain the shear strength by the sum of the strengths of a plurality of welding lines, it is not preferable to leave too much space.
Specifically, it is preferably set in the range of 50 to 5,000 μm. More preferably, it is 50 to 3000 μm, 100 to 2000 μm, and 100 to 1000 μm.

The adhesive strength is evaluated by peeling strength (90 ° peeling, 180 ° peeling, T-type peeling), shearing strength (tensile shearing, compression shearing), tensile adhesive strength, etc. depending on the method of breaking the adhesive component and the adherend. A method of measuring and evaluating strength is known. Among them, it is the tensile shear strength that is suitable for measuring the retort resistance, and the T-peel strength is the strength at which the film is opened with the ears. In one aspect of the present invention, the notch and / or the small hole of the ear portion 7 is used as a trigger to open the ear portion. The unsealing strength in that case can be measured as the unsealing strength (notch peeling strength) similar to the T-type peeling strength after making a notch in the film. Strength can be measured using a force gauge and is expressed as the magnitude of the force required to break the bond. In the example, as shown in FIG. 6, by pulling A and C of the welded film and pulling, the force at which the weld breaks is shear strength, and as shown in FIG. 7, B and C of the film are pulled to open the film. The force applied was defined as the cut peel strength.
The force (cut peel strength) at which the tear of the film generated from the notch of the edge portion of the film reaches the opening of the film beyond the portion of the film is correlated with the T-type peel strength, but with a much smaller force. Can be opened.

The notch and / or the small hole provided in the ear portion 7 may have any shape as long as it triggers opening. For example, it may be a single cut, a perforation, or a large number of small holes as shown in FIG.
The unsealing piece is a member provided to facilitate unsealing of the tubular film 5 in the manufactured package 1. When the notch and / or the small hole is not provided in the ear portion 7, it can be provided as a trigger for opening the film. The unsealing piece is usually formed by forming a synthetic resin film into a rectangular shape. However, the shape is not limited to a rectangle, and may be a square or another polygon. However, the rectangular shape (rectangular shape) is most suitable for the purpose, and the degree of freedom in selecting the material is high, which is preferable. As with the material of the strip-shaped film forming the tubular film 5, the material of the unsealing piece is preferably vinylidene chloride resin. The unsealing piece and the tubular film may be made of the same material or different materials. The welding line of the unsealed piece may be any of the conventionally used modes.

  The package 1 described above is manufactured in the following manner. A strip-shaped film to be the tubular film 5 is set in the manufacturing apparatus as an original fabric. Then, the strip-shaped film is drawn out, the strip-shaped film is rolled into a tubular shape so that both sides thereof overlap each other, and the overlapped portions are vertically sealed to form the tubular film 5. After that, the tubular film 5 is filled with the contents 9, and the contents 9 are squeezed at a predetermined interval (the length when the package 1 is formed) so that the tubular film 5 does not contain the contents 9. Is formed, the absent portions are bundled, and a tape serving as the ligation member 6 is wrapped and welded to seal. Then, the middle of the sealed portion of the absent portion which is bundled so as to maintain the hermeticity of the end portion is cut, and the package 1 is obtained. The package 1 is then heat-coagulated if necessary.

  Examples of the present invention will be described below, but the present invention is not limited thereto.

The shear strength and the notch peeling strength of the package (Example) welded with two welding lines of the present invention and the conventional package (Comparative Example) welded with one welding line were compared.
The package used is a package containing fish sausage as a content, a diameter of 23 mm, a length of 170 mm, and a content of 75 g. As the film, a 41-μm-thick two-layer polyvinylidene chloride film (polyvinylidene chloride single-layer double-ply film) was used. A sample was obtained by performing retort treatment at 118 ° C. for 16 minutes.
The welding method for welding the film in a tubular shape was a high-frequency induction heating method, and both electrodes were welded by using single-line and double-line electrodes. The state of welding before being subjected to the retort treatment is shown in FIGS. As shown in FIG. 1, the single line has a width of 378 μm and a thickness of 111 μm, and as shown in FIG. 2, the two lines have a width of 559 μm and a width of 131 μm, a thickness of 116 μm and a width of 148 μm, and a thickness of 126 μm. It was welding.
The shear strength and cut peel strength of these packages were measured. The measuring method is to use the digital force gauge of IMADA CO., LTD. To take out the contents from the package after retort, cut open the tube on the side opposite to the welding line, make the film 16 mm wide, and sandwich one of the films with a clamp, The other was pulled at a constant speed and measured. The results are shown in Table 1.
The shear strength is a reference value because the film strength is lowered probably because the film has a width of 16 mm and the film is broken instead of the welding line, but it is sufficient to endure the actual retort treatment in both Examples and Comparative Examples. There was strong strength. On the other hand, by using two lines, the notch peeling strength was ⅓ or less of that in the case of one line.
When an attempt was made to open from the notches of the ears of the films of these packages, the examples could be easily opened, but the comparative examples could not be opened manually.

  INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a vinylidene chloride resin film package capable of easily and reliably opening a film such as a fish meat sausage.

1 Package 5 Cylindrical Film 5E Ligation End 6 Ligation Member 7 Film End (Ear)
9 Contents 10 Vertical seals 10a, 10b Two welding lines 11 Cuts and / or small holes

Claims (7)

A tubular film in which a vinylidene chloride resin film is formed into a tubular shape by a vertical seal;
Contents filled in the tubular film;
A ligation member for ligating both ends of the tubular film, which is filled with the contents, to form a ligation end;
The vertical seal is formed of at least two weld lines;
Packaging.   Furthermore, the package of Claim 1 which has a notch and / or a small hole for opening in the edge piece of the film which protruded to the outer side of the package by a vertical seal.   The package according to claim 1 or 2, wherein one of the at least two welding lines has a line width independently of 10 to 1,000 µm.   The package according to any one of claims 1 to 3, wherein the at least two welding lines are adjacent to each other at an interval of 50 to 5,000 µm.   The method for producing a package according to claim 1, wherein the welding is performed by a high frequency dielectric heating method.   The packaging body according to any one of claims 1 to 4, wherein the tubular film is formed by envelope envelopment or joint plying. The package according to any one of claims 1 to 6, wherein the content is a food containing condensed meat.