JPS63272612A - Package, method and apparatus for preparing the same - Google Patents

Abstract

PURPOSE:To allow a package to sufficiently withstand pressure even when the internal pressure of said package becomes high, by adding and mounting a reinforcing film to the outsides of the bundled parts at both ends of a cylindrical casing film. CONSTITUTION:The flat parts 1a of a cylindrical casing film 1 and reinforcing film tapes 5 are together subjected to ultrasonic welding under the contact pressure of an anvil and an ultrasonic horn. By this method, the strength of each welded part becomes high as compared with such a case that only the casing film 1 is merely welded and, even when the internal pressure of the formed package becomes high in the heat treatment such as retorting or boiling after packing, the welded part of each flat part 1a becomes possible to sufficiently withstand internal pressure since the wall thickness of the welded part can be kept equal to or more than the original wall thickness of the casing film 1 when the reinforcing film tape 5 is used.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a packaging body for packaged processed foods such as sausages and hams, and in particular, the present invention relates to a packaging body in which processed foods such as sausages and hams are packaged. The present invention relates to a package, a method for manufacturing the same, and a manufacturing device.

(Background of the Invention) FIG. 6 is a perspective view showing a conventional package for packaging sausages or the like.

In a conventional package of this type, a processed food is wrapped in a biaxially stretched casing film 1 made of, for example, a copolymer of vinylidene chloride and vinyl chloride. The casing film 1 is formed into a cylindrical shape, and its edges are joined together to form a seal line 2 by high frequency welding.

After the processed food is filled into the casing film 1, both ends of the casing film 1 are squeezed and fixed with wire clips 3 made of aluminum or the like.

A package whose ends are fastened with the wire clips 3 in this way has a high clip strength at both ends, so when performing heat treatment such as retort (high temperature and high pressure sterilization) or boiling in the later process, Able to withstand increased pressure within the package.

[Problem that the invention seeks to solve]

The packaging shown in Figure 6 has been used for a long time.
It has become well-established as the appearance of sausages, etc. However, the packaging appearance of processed foods is not unrelated to purchasing intent, and new packaging formats must be developed in order to promote purchasing intent and to emphasize the improved quality of the food packed inside. desired.

Furthermore, as shown in FIG. 6, the package secured by the wire clip 3 not only lacks novelty in appearance as described above, but also has poor sealing properties at the clip portion, and the inside of the package during the heat treatment process. Due to the increase in pressure, there is a risk that moisture in the processed food may seep out from the clip portion, or when vacuum packaging ham or the like, the vacuum may return from the clip portion.

Therefore, recently, a package structure has been considered in which the wire clips 3 are not used, and both ends of the cylindrical casing film 1 are bundled together, and the bundled parts are ultrasonically welded. This kind of packaging is, for example, JP-A-59-
It is described in Japanese Patent No. 26424.

Although this package can be said to be a new packaging form in that it eliminates the wire clip, it is similar in appearance to the conventional package shown in FIG. 6, and cannot be called a novel design. In addition, a package in which the bundled part of the casing film is simply ultrasonically welded to the car body has excellent sealing performance, but the pressure resistance of the welded part is lower than that in which the wire clip 3 is used. There are drawbacks. Therefore, it is effective for packaging products that only need to be wrapped, but when used for products that require heating processes such as retort or boiling after packaging, such as sausages and hams, retort or boiling is effective. Due to the increase in internal pressure caused by heat treatment, the welded parts are destroyed and the sealing performance is reduced, leading to concerns about spoilage due to the inflow of outside air and increasing the possibility that moisture from the packaged items will seep out. Furthermore, in the worst case, there is a risk that the package may burst during the retort process. In addition, in this type of packaging, if measures such as increasing the contact pressure between the ultrasonic horn and the anvil are taken to increase the strength of the weld at the converging part of the casing film 1, the weld will melt too much and pinholes will occur. Otherwise, there are problems such as the convergence part being fused and not being able to be completely sealed.

The present invention solves the above-mentioned conventional problems, and it is possible to seal both ends of a package with sufficient strength only by welding means such as ultrasonic waves without providing wire clips.
It also aims to provide a new packaging appearance compared to conventional packaging.

[Specific Means for Solving the Problems] The present invention is characterized in that the edges of a casing film are joined together to form a cylindrical shape, the inside of the casing film is filled with an object to be packaged, and both ends of the casing film are joined together to form a cylindrical shape. The part is crushed to form a flat shape, and in this flat part, if the casing film is one film, three or more layers including this casing film, or two casing films are superimposed. In the case of The object to be packaged is filled into the film, and the casing film filled with the object to be packaged is crushed at the end of the package to form a flat part, and one sheet of casing film is formed in this flat part. Packaging in which three or more layers including this casing film are welded together, or five or more layers including this casing film are welded together if the casing film is a superposition of two films. a molding member for molding a casing film into a cylindrical shape; a sealing mechanism for joining the edges of the casing film molded into a cylindrical shape by the molding member; A filling nozzle that fills the object, a squeezing mechanism that partially crushes the cylindrical casing film filled with the object to form a flat part, and a reinforcing film that supplies the reinforcing film to the outside of the flat part of the casing film. This is a package manufacturing device that includes a supply mechanism and a welding mechanism that welds together the casing film and reinforcing film of the flat part.

[For production]

The packaging body according to the present invention is made by crushing both ends of a casing film formed into a cylindrical shape into flat shapes, and its appearance is greatly different from that of Jourai shown in Fig. 6, and is a novel packaging form. becomes. In addition, in the manufacturing method and manufacturing device, in the case where the casing film is one film, three or more layers including this casing film are formed in the flat part where both ends of the casing film are crushed.
Alternatively, when the casing film is a stack of two films, five or more layers of films including the casing film are welded together using means such as ultrasonic waves. Therefore, the strength of the welded part can be increased compared to when only the casing film is welded to Hayabusa, and it can withstand the high internal pressure of the package during heat treatment processes such as retorting and boiling. It becomes like this.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings of FIGS. 1 to 5.

FIG. 1 is a perspective view showing an embodiment of the package according to the present invention;
Fig. 2 is a perspective view showing the welded end portion of the package shown in Fig. 1, Fig. 3 is a front view of the manufacturing equipment for manufacturing the package shown in Fig. 1, and Fig. 4 is a FIG. 3 is a partial front view showing a welding unit in the manufacturing apparatus.

As shown in FIG. 1, the package according to the present invention includes a casing film 1 made of a copolymer resin of vinylidene chloride and vinyl chloride that is biaxially stretched by an inflation method or the like, and the edges thereof are high-frequency sealed with a seal line 2. It is shaped like a cylinder, and the inside is filled with processed meat. Both ends of the casing film 1 are crushed to form a flat part 1a, and reinforcing film tapes 5 are attached to both sides of the flat part 1a.

This reinforcing film tape 5 is made of a material that can be welded to the casing film 1, and for example, like the casing film 1, it is made of a copolymer resin of vinylidene chloride and vinyl chloride that is biaxially stretched by an inflation method or the like. film is used. This reinforcing film tape 5 needs to be made of a material that can be welded to the casing film 1, and if it can be welded,
It may be formed of a material different from that of the casing film 1. Then, the casing film 1 and the reinforcing film tape 5 are ultrasonically welded together at the seal line A at the flat portion 1a. For example, the casing film 1 is
The fold width is 22+11111 and the film thickness is 20μ.
2 pieces stacked together or 40μm thick
In the case of a single film, the reinforcing film 5 has a width W of 4a+m, a length H of about 22 mm, which is the same as the folding width,
The thickness T of the seal line A portion is approximately 0.05 to 0.1 mm.

Furthermore, as shown in FIG. 2, if a notch 4 is cut into the edge of the flat portion 1a at both ends or either side of the casing film 1, the casing film 1 can be easily torn from the notch 4. This allows the casing film 1 to be easily peeled off from the packaged object.

Next, an apparatus for manufacturing the above-mentioned package will be explained.

In FIG. 3, reference numeral 11 indicates a supply pump, and reference numeral 12 indicates a filling nozzle. Processed meat, etc. when manufacturing sausages is pressurized by this supply pump 11,
It is supplied from the filling nozzle 12. A molded member 13 is provided around the upper portion of the filling nozzle 12 in the drawing. Original fabric 1
The casing film 1 pulled out from the molding member 1 is guided by guide rolls 15a and 15b, and
3 into a cylindrical shape. Furthermore, opposing high-frequency electrodes 16 and 17 are provided below the molding member 13, and the edges of the casing film 1 formed into a cylindrical shape by the molding member 13 are connected to the high-frequency electrodes 8116 and 17.
Welded by. The high-frequency electrodes 16 and 17 form a seal line indicated by reference numeral 2 in FIG. 1 on the casing film 1, forming a complete cylindrical shape. Then, the filling nozzle 12 fills the cylindrical casing film 1 with the object to be packaged.

A film feed roller 18 is located below the filling nozzle 12.
and 19 are provided, and the cylindrical casing film 1 is continuously sent downward by the film feed rollers 18 and 19. Furthermore, a pair of squeeze rollers 21 are provided on the lower side. The pair of squeezing rollers 21 are driven into pressure contact with each other and away from each other, and due to the pressure contact action, the casing film 1, which is fed downward while being filled with processed food, is intermittently squeezed so that it becomes flat.

A welding unit 30 is arranged below the squeezing roller 21. This welding unit 30 is configured to reciprocate up and down in accordance with the descending speed of the cylindrical casing film 1, and the welding unit 30 welds the portion squeezed into a flat shape by the squeeze roller 21. And it is cut.

FIG. 4 shows the structure of the welding unit 30. code 3
1 and 32 are pressing plates. A pair of press plates 31 arranged on one side are arranged vertically with an interval between them, and a pair of press plates 32 arranged on the other side are arranged vertically with a slightly shorter interval than the press plates 31. ing. The tip of one pressing plate 31 is a flat pressing surface 31a, and the tip of the other pressing plate 32 is also a flat pressing surface 32a. Each of the pressing plates 31 and 32 is driven back and forth by a drive mechanism (not shown). As shown in FIG. 4, when both pressing plates 31 and 32 advance in the direction in which they come into pressure contact with each other, the flat portion 1a of the casing film 1, which has been squeezed by the squeezing roller 21 shown in FIG. 32 further presses it into a flat state.

Further, an anvil 33 is provided in the middle of one of the pressing plates 31, and an ultrasonic horn 34 is provided in the middle of the other suppressing plate 32. As shown in Figure 3, the ultrasonic horn 3
4 is connected to a converter 36 that converts high frequency waves into ultrasonic waves and a booster 35 that amplifies the ultrasonic waves. The anvil 33 and the ultrasonic horn 34 can be moved forward and backward relative to each other by a drive mechanism, and when both move forward and backward by this drive mechanism, the pressure surface 33 at the tip of the anvil 33
a and the pressing surface 34a at the tip of the ultrasonic horn 34, the flat portion 1a of the casing film 1 and the reinforcing film tape 5 are sandwiched under a predetermined pressure. Further, a pair of second pressing plates 39 are provided inside the anvil 33. This suppressing plate 39 also has a flat tip. As shown in FIG. 4, a cutter 37 is provided between the pair of second pressing plates 39. This cutter 37 is supported by a cutter base 38. The cutter base 38 is driven to move forward slightly behind the forward movement of the anvil 33, and this forward movement cuts the central portion of the flat portion 1a of the casing film 1.

Reference numeral 5 is a reinforcing film tape. In the embodiment shown in FIG. 4, four reinforcing film tapes 5 are supplied by a tape guide (not shown) and
3a and in front of the pressure surface 34a of the ultrasonic horn 34. Although not shown, the welding unit 30
A cutting member for cutting the reinforcing film tape 5 welded together with the casing film 1 by an anvil 33 and an ultrasonic horn 34 is provided inside. In the embodiment shown in FIG. 4, four reinforcing film tapes 5 are supplied on both sides of the flat part 1a, but a total of two wide reinforcing film tapes 5 are provided, one on each side of the flat part 1a. may also be supplied. In this case, the reinforcing film tape 5 welded together with the flat part 1a is attached to the cutter 3.
7, it is cut together with the flat portion 1a.

Next, a method for manufacturing a package using the above manufacturing apparatus will be explained.

The casing film 1 is made of, for example, a copolymer resin of vinylidene chloride and vinyl chloride that is biaxially stretched by an inflation method, and has a thickness of 20 μm.
A single film having a thickness of about 40 μm or a stack of two films having a thickness of about 40 μm is used. Further, the reinforcing film tape 5 is made of, for example, a film obtained by biaxially stretching a copolymer resin of vinylidene chloride and vinyl chloride by an inflation method or the like. The reinforcing film tape 5 may be a two-layered film or a single film with a thickness of approximately 20 to 90 μm, and the thickness may be arbitrarily selected depending on welding conditions and the like.

As shown in FIG. 3, the casing film 1 pulled out from the original fabric 14 is formed into a cylindrical shape by the forming member 13, and the casing film 1 is
8 and 19, it is sent downward at a constant speed. The edges of the cylindrically shaped casing film 1 are brought together and welded and sealed by high frequency electrodes 16 and 17 (see reference numeral 2 in FIG. 1). A supply pump 11 is placed inside the cylindrical casing film 1.
Then, the filling nozzle 12 fills the packaged item with processed meat or the like.

The casing film 1 filled with the object to be packaged is intermittently squeezed into a flat shape by the pressing operation of a pair of squeezing rollers 21.

Furthermore, in the welding unit 30 that reciprocates up and down, first, the press plates 31 facing both sides of the film casing 1
and 32 are driven in the direction in which they approach each other, and the flat portion 1a, which is squeezed by the squeezing roller 21,
It is further pressed by the pressing surfaces 31a and 32a of 1 and 32. A little later than the operation of the press plates 31 and 32, the anvil 33 and the ultrasonic horn 34 move forward, and the pressurizing surface 33a of the anvil 33 and the pressurizing surface 34a of the ultrasonic horn 34 supply the pressure to the side of the flat portion 1a. The reinforcing film tape 5 and the casing film at the flat portion 1a are sandwiched together. Then, under the contact pressure between the anvil 33 and the ultrasonic horn 34, the flat portion 1a of the casing film 1 and the reinforcing film tape 5 are ultrasonically welded together. After the rough welding operation is completed, the cutter base 38 advances and cuts the middle of the upper and lower welded parts of the casing film 1.

In addition, if a V-shaped auxiliary blade is integrally provided in a part of the blade of the cutter 37, when the flat part 1a of the wrap film 1 is cut by the cutter 37, the auxiliary blade will be used as shown in FIG. It is possible to form a notch as shown at 4 together.

This cutting operation produces individually separated packages as shown in FIG. As shown in FIG. 2, in the manufactured package, the flat parts 1a at both ends of the casing film 1 are welded together with the reinforcing film tape 5. As shown in the experimental results described later, in this flat part 1a, the casing film 1 and the reinforcing film tape 5 are welded together, so the strength of the welded part is higher than that when only the casing film 1 is welded. Even if the internal pressure of the packaging becomes high during heat treatment such as retorting or boiling after packaging, the welded portion of the flat portion 1a can sufficiently withstand it. One of the reasons why the strength of the welded portion can be increased by using the reinforcing film tape 5 in this way is as follows.

If the reinforcing film tape 5 is not used, the thickness of the welded part of the casing film 1 will be less than the original thickness of the casing film due to the contact pressure between the anvil and the horn. This is because when using the casing film 1, the thickness of the welded portion can be kept greater than the original thickness of the casing film 1.

In the above embodiment, the reinforcing film tape 5 is attached and welded to the flat part 1a of the casing film 1 from both sides, but even if the reinforcing film tape 5 is attached to only one side of the flat part 1a, , it is possible to increase the strength of the welded part to some extent.

Further, in each of the above embodiments, the same effect can be expected even if the welding means for welding the casing film 1 and the reinforcing film tape 5 is high frequency welding.

Next, FIG. 5 shows a second embodiment of the package according to the present invention. In this package, as in the package shown in FIGS. 1 and 2, the ends of the casing film 1 formed into a cylindrical shape are crushed to form a flat part 1a.
The edges of a are folded. And this folded part 1b
and the flat part 1a, and the lid film is ultrasonically welded to form 4 layers (when the casing film 1 is one film) or 8 layers (when the casing film 1 is a film in which two layers are stacked), 1 is formed on the seal line. That is, the folded portion 1b functions in the same manner as the reinforcing film tape 5 shown in FIG. 2, and the welding strength of the flat portion 1a is increased by welding four or eight layers of film.

(Experimental Results) The results of the strength test of the package having the welded portion described above will be explained.

22 Dojin Nidan I Casing film 1 is made of a copolymer resin with a polymerization composition ratio of 80 parts by weight of vinylidene chloride and 20 parts by weight of vinyl chloride, as well as a plasticizer, a stabilizer, a lubricant, and a matte finish agent. The mixture was mixed, heated and melted using a melt extruder, extruded from a tubular nozzle, rapidly cooled, and then biaxially stretched using an inflation method. The casing film 1 used was a stack of two films with a thickness of about 2 μm, or a single film with a thickness of about 40 μm, and a fold width of about 22 mm.

The reinforcing film tape 5 contains 77 parts by weight of vinylidene chloride,
A plasticizer, a stabilizer, a lubricant, and a matte finish agent are mixed with a copolymer resin having a polymerization ratio of 23 parts by weight of vinyl chloride, heated and melted using a melt extruder, extruded through a tubular nozzle, and after quenching, the inflation method is performed. The film was biaxially stretched by the following methods. The dimensions of the reinforcing film tape 5 are:
The width W shown in FIG. 2 was about 4 mm, and the length H was about 22 mm, matching the folding width of the casing film 1.

In addition, eight types of films were produced, either two stacked films or a single film, each having a total thickness of 20 μm to 90 μm, each differing by 10 μm, and experiments were conducted on each film.

As a result of the sealing strength test of the welded part, the casing film 1 made of the above-mentioned material was formed into a cylindrical shape, and one end of the casing film 1 was crushed to form a flat shape as shown in the first embodiment in FIG. A reinforcing film tape 5 is attached to both sides and welded using a 350W ultrasonic horn at 40Hz to a welding thickness T of about 0.05mm~
A welded portion of 0.1 mm was formed. This was used as an experimental sample corresponding to the present invention. In addition, as a comparison sample, one end of the casing film 1 formed into a cylindrical shape was crushed to make it flat, and this flat part was welded with an ultrasonic horn of 350 W at 40 Hz without adding the reinforcing film tape 5. used.

In the experiment, an air nozzle was inserted into the open end of a cylindrical film whose one end was welded by the above method, and the film was closed with a rubber tube at a position approximately 300 mm away from the flat welded part to prevent air from leaking. Make it. This was submerged in water, air pressure was gradually applied, and the gauge pressure (Kg/cm2) at the time when air leakage occurred was measured.

The experimental results are shown in Table-1. In the table below,
The sealing conditions are as follows: The value on the left is the contact pressure between the ultrasonic horn and the anvil (Kg/cm'), and the value on the right is the amplitude (μm).
). The unit of tape thickness is (μm). The seal strength is the gauge pressure (g/cm') mentioned above, and the measurement limit is 2.0 Kg/cm2. The number of samples was 50 for each condition.

Table 1 From Table 1 above, even if the edges of the casing film are sealed by welding the flat parts in the same way, those using reinforcing film tape 5 are better than those not using reinforcing film tape 5. It can be seen that the seal strength is much higher. Also, depending on the sealing conditions, 2.0Kg/cm2
Since the above pressure resistance strength can be obtained, it has been confirmed that the present invention can be sufficiently applied to packaging bodies to be subjected to a retort process.

As a result of the destruction of the casing, the casing film 1 made of the above-mentioned material was formed into a cylindrical shape, the inside of which was filled with water, and both ends were crushed as in the first embodiment shown in FIGS. 1 and 2. A package with a length of 180 mm was produced by making it into a flat shape, attaching reinforcing film tape 5 to both sides of the flat part 1a, and welding it using an ultrasonic horn of 350 W at 40 KHz. The thickness T of the welded portion is approximately 0.05 to 0.1 mm. This was used as an experimental sample corresponding to the present invention. As a comparison sample, a casing film 1 formed into a cylindrical shape was filled with water, both ends were crushed to make it flat, and this flat part was used as an ultrasonic horn of 350 W at 40 KHz without adding the reinforcing film tape 5. By folding and welding, a package with a length of 180+1101 mm was produced.

For each sample above, the pressure was 2.2Kg/c+n2. temperature 12
Retort sterilization at 0°C was performed for 15 minutes. The experimental results are shown in Table-2. In the table below, the sealing conditions are as follows: The numbers on the left indicate the contact pressure between the ultrasonic horn and the anvil (g
/Cm') The value on the right side of s is the amplitude (μm).

The unit of tape thickness is (μm). Moreover, the numerical value of the destruction ratio indicates the number of sample packages broken against the number of 50 sample packages under each condition. That is, in the fracture ratio, the denominator is the number of samples subjected to the experiment, and the numerator is the number of samples destroyed.

(The following is a margin.) Table 2 As mentioned above, most of the casing films that are flattened at both ends and welded without using reinforcing film tapes are destroyed during the retort process. On the other hand, the number of broken packages in which the flat parts are welded using the reinforcing film tape 5 as in the present invention is extremely small, and depending on the sealing conditions, no breakage occurs during the retort process. Therefore, it has been confirmed that the packaging body of the present invention can be put to practical use even when packaging items such as sausages that require a retort process.

Note that in the present invention, the film material is not limited to a copolymer of vinylidene chloride and vinyl chloride, and the same effect can be expected even if other resins are used.

Other resins that can be used for ultrasonic welding include, for example, vinylidene chloride-based copolymers made of vinylidene chloride and a copolymerizable monomer, or films made of polyvinyl chloride.

Furthermore, even when the packaging according to the present invention is applied to products such as ham that are vacuum packaged and boiled after packaging, the sealing strength can be increased, the seal part will not break during the boiling process, and vacuum return will be prevented. You can prevent it from happening.

Furthermore, even if the packaging according to the present invention is used for products that do not require heat treatment, such as stick cheese,
A novel packaging form can be provided, and a completely sealed package can be provided.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a completely new package for sausages, etc., which is different from the package using wire clips made of aluminum or the like as shown in FIG. As a result, it becomes possible to renew the image of sausages and the like, and to increase the desire to purchase the products through packaging. Additionally, by attaching and welding a reinforcing film to the flat part of the casing film, it is possible to increase the sealing strength of the flat part, making it possible to use it as a package for foods that undergo heat treatment such as retorting or boiling. Become.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a first embodiment of the package according to the present invention, FIG. 2 is a partial perspective view showing the welded end portion of the package shown in FIG. 1, and FIG. 3 is a package according to the present invention. 4 is a partial front view showing a welding unit of the packaging body manufacturing apparatus; FIG. 5 is a partial perspective view showing a second embodiment of the packaging body according to the present invention; FIG. FIG. 6 is a perspective view of a conventional packaging body. DESCRIPTION OF SYMBOLS 1... Casing film, la... Flat part of casing film, 5... Reinforcement film tape, 12.
...Filling nozzle, 13...Molding member, 16°17...
・High-frequency electrodes forming the seal mechanism, 18°19...
Film feed roller, 21... Squeezing roller constituting the aperture mechanism, 30... Welding unit, 31° 32.39
... Pressing plate, 33... Anvil constituting the ultrasonic welding mechanism, 34... Horn constituting the ultrasonic welding mechanism,
37...Cutter. Figure 1 5 Reinforcement film/mutea Figure 3 Figure 6 Procedural amendment, January 12, 1988 Kunio Ogawa, Commissioner of the Patent Office, Gu1
Indication of the case 1988 Patent Application No. 107022 2 Name of the invention Packaging body and its manufacturing method and manufacturing device 3 Representative of the person making the amendment Hiroshi Takahashi 5 Date of the amendment order (voluntary) 6 Inventions increased by the amendment Number None Full text Corrected specification 1 Name of the invention Packaging body and its manufacturing method and manufacturing device 2 Claims (1) The edges of the ft casing film are joined together to form a cylindrical shape, and the inside thereof is formed into a cylindrical shape. If the casing film is filled with a packaged product and both ends of the casing film are crushed to form a flat bottom shape, and the casing film is a single film at this flat part, the casing film is A package formed by welding together three or more layers, or if the casing film is a superposition of two films, five or more layers including the casing film. (2) A reinforcing film is attached to one or both outer surfaces of the flat part, and the casing film and the reinforcing film are welded together at the flat part. packaging. (3) The edge of the casing film is folded 7 times at the flat part, and if the casing film is one film, there are 4 layers or casing film, including this folded part at the flat part. The package according to claim 1, in which eight layers of films are welded when is two films stacked on top of each other. (4) The package according to claim 1, 2, or 3, wherein the film is welded at the flat portion by ultrasonic waves. (5) L! i Molding the casing film in one trial, joining the edges together, filling the casing film with the object to be packaged, and forming the part that will become the end of the package. In the flat part, if the casing film is one film, there are three or more layers including this casing film, or if the casing film is two films stacked, there are 5 layers including this casing film. A method of manufacturing a package in which more than one layer of film is welded together. (6) The method for producing a package according to claim 5, wherein a reinforcing film is supplied to one or both outer surfaces of the flat portion, and the casing film and the reinforcing film are welded together. (7) Fold the casing film once at the flat part, including this folded part at the flat part, if the casing film is one film, 4 layers, or a stack of two casing films. 6. The method of manufacturing a package according to claim 5, wherein eight layers of films are welded in the case of lamination. (8) The method for manufacturing a package according to claim 5, 6, or 7, wherein the film is welded at the flat portion using ultrasonic waves. (9) A molding member for molding the fa casing film into a cylindrical shape, a sealing mechanism for joining the edges of the casing film molded into a cylindrical shape by the molding member, and 1) filling the casing film with an object to be packaged. a filling nozzle;
A squeezing mechanism that partially crushes a cylindrical casing film filled with an object to be packaged to form a flat part, a reinforcing film supply mechanism that supplies a reinforcing film to the outside of the flat part of the casing film, and a flat part of the casing film. and a reinforcing film together. (10) The package manufacturing apparatus according to claim 9, wherein the welding mechanism is an ultrasonic welding mechanism comprising a horn and an anvil that sandwich the flat part of the casing film and the reinforcing film. 3. Detailed Description of the Invention [Technical Field] The present invention relates to a package for packaged processed foods such as sausages and hams, and in particular, the present invention relates to a package in which processed foods such as sausages and hams are packaged, and in particular, the seal portions at both ends of a casing film formed into a cylindrical shape have a flat shape. The present invention relates to a packaging body, a method for manufacturing the same, and a manufacturing device. [Background of the Invention] FIG. 6 is a perspective view showing a conventional package for packaging sausages or the like. In conventional packages of this kind, processed foods are wrapped in a biaxially stretched strip-shaped casing film made of, for example, a copolymer of vinylidene chloride and vinyl chloride. This band-shaped casing film is formed into a cylindrical shape, and its edges are high-frequency welded, leaving a slight margin. Note that a seal line formed by high-frequency welding is indicated by reference numeral 2. After the processed food is filled into the cylindrical casing film 1, the cylindrical casing film 1
Both ends are squeezed and secured with wire clips 3 made of aluminum or the like. A package whose ends are fastened (clipped) with the wire clips 3 in this way has a high clip strength at both ends, so it can be heated in a retort (high temperature and high pressure sterilization) or boiled in a later process. During processing, the clip portion can withstand increased pressure within the package. [Problems to be solved by the invention] The packaging body having the shape shown in Fig. 6 has been used for a long time in the past.
It has become well-established as the appearance of sausages, etc. However, the packaging appearance of processed foods is not unrelated to purchasing intent, and new packaging formats must be developed in order to promote purchasing intent and to emphasize the improved quality of the food packed inside. desired. Furthermore, as shown in FIG. 6, the package secured by the wire clip 3 not only lacks novelty in appearance as described above, but also has poor sealing properties at the clip portion, and the inside of the package during the heat treatment process. Due to the increase in pressure, there is a risk that moisture in the processed food may seep out from the clip portion, or when vacuum packaging ham or the like, the vacuum may return from the clip portion. By the way, the term "vacuum return" here means that air from the outside world enters the inside of the package and the vacuum is no longer there. Therefore, recently, instead of using the wire clip 3, both ends of the casing film formed into a cylindrical shape are converged,
A package structure is being considered in which the focusing portion is simply ultrasonically welded. This type of packaging is known, for example, from Japanese Patent Application Laid-Open No. 59-2
It is described in Publication No. 6424. Although this package can be said to be a new packaging form in that it eliminates the wire clip, it is similar in appearance to the conventional package shown in FIG. 6, and cannot be called a novel design. In addition, a package in which the bundled part of the cylindrical casing film is simply ultrasonically welded has excellent sealing performance, but the pressure resistance strength of the welded part is lower than that in which the wire clip 3 is used. There are drawbacks to doing so. Therefore, it is effective for packaging products that only need to be wrapped, but when used for products that require heating processes such as retorting or boiling after packaging, such as sausages and hams, it is Due to the increase in internal pressure due to heat treatment such as boiling, the pressure-resistant strength of the welded part is insufficient and the welded part is destroyed and the sealing performance is reduced, leading to concerns about spoilage due to the inflow of outside air and moisture leakage of the packaged items. more likely to. In the worst case, there is a risk that the package will burst at the welded portion during the retort process. In addition, in this type of packaging, if measures are taken such as increasing the contact pressure between the ultrasonic horn and the anvil to increase the strength of the weld at the converging part of the cylindrical casing film, the weld will melt too much and become pinned. There may be problems such as holes being formed, or the convergence part being fused and the pressure resistance of the welded part being reduced, making it impossible to achieve a complete seal. The present invention solves the above-mentioned conventional problems, and allows both ends of a package to be welded with sufficient pressure resistance only by welding means such as ultrasonic waves without providing wire clips. The aim is to provide a novel packaging appearance compared to the original packaging. [Specific means for solving the problem] The present invention provides a cylindrical casing film in which the edges of a band-shaped casing film are joined together to form a cylindrical shape, the inside of which is filled with an object to be packaged, and a cylindrical casing film. Both ends of the film are crushed and formed into a flat shape, and at this flat part, if the casing film is one film, three or more layers including this casing film, or two casing films are formed. In the case of a stack of 5 or more films, including the casing film, welded together, a package formed by forming a band-shaped casing film into a cylindrical shape and joining its edges together, A cylindrical casing film is filled with the item to be packaged, a flat part is formed at the end of the package, and if the casing film is a single film, this casing film A method for producing a package in which three or more layers including the casing film are welded together, or if the casing film is a superposition of two films, five or more layers including the casing film are welded together, and a strip-shaped casing film. a molding member for molding into a cylindrical shape;
A sealing mechanism that joins the edges of a casing film formed into a cylindrical shape by a molding member, a filling nozzle that fills an object to be packaged into the cylindrical casing film, and a cylindrical casing film filled with an object to be packaged. A drawing mechanism that partially crushes to form a flat part, a reinforcing film supply mechanism that supplies reinforcing film to the outside of the flat part of the casing film, and a welding mechanism that welds and cuts the flat part of the casing film and the reinforcing film together. This is a manufacturing device for a package including. [Function] The package according to the present invention is made by flattening both ends of a casing film formed into a cylindrical shape, and its appearance is significantly different from the conventional one shown in FIG. It becomes a packaging form. In addition, in the manufacturing method and manufacturing device, in the flat part where both ends of the casing film are crushed, if the casing film is one film, there are three or more layers including this casing film, or two casing films are formed. 5 films including this casing film.
Films with more than one layer are welded together using means such as ultrasonic waves. That is, if the flat part is simply welded by sandwiching the ultrasonic horn and the anvil, the thickness of the fused part becomes thinner due to the pressure between the horn and the anvil, and the strength of the welded part decreases. Furthermore, in extreme cases, the casing film forming the converging part may be fused and cut, and in such a case, the strength of the welded part is significantly reduced. In the present invention, a reinforcing film is attached to the outside of the focusing part and is sandwiched and welded between the horn and anvil, so the thickness of the fused part can be the same as or greater than the original thickness. It is. This makes it possible to increase the strength of the welded part compared to when only the casing film is welded to the car, and it can withstand the high internal pressure of the package during heat treatment processes such as retorting and boiling. It becomes like this. [Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings of FIGS. 1 to 5. FIG. 1 is a perspective view showing an embodiment of the package according to the present invention;
Fig. 2 is a perspective view showing the welded portion of the end of the package shown in Fig. 1, Fig. 3 is a schematic diagram of the manufacturing apparatus for manufacturing the package shown in Fig. 1, seen from the front, and Fig. 4 is a FIG. 4 is a partial front view showing the welding unit in the manufacturing apparatus of FIG. 3; As shown in FIG. 1, the package according to the present invention is manufactured by high-frequency welding the edges of a casing film made of a copolymer resin of vinylidene chloride and vinyl chloride biaxially stretched by an inflation method or the like. It is formed into a cylindrical shape (the seal line is shown as 2), and the inside is filled with processed meat or the like. Both ends of the cylindrical casing film 1 are crushed to form a flat part 1a, and reinforcing film tapes 5 are attached to both sides of the flat part 1a. This reinforcing film tape 5 includes the cylindrical casing film 1
For example, like the casing film, a film made of a copolymer resin of vinylidene chloride and vinyl chloride that is biaxially stretched by an inflation method or the like is used. The reinforcing film tape 5 needs to be made of a material that can be welded to the casing film, and may be made of a material different from that of the casing film as long as it can be welded to the casing film. The casing film and reinforcing film tape 5 are ultrasonically welded together at the seal line A at the flat portion 1a. For example, the casing film 1 has a folding width of 22
It is mm. Incidentally, the folding width is a term used by those skilled in the art, and is the width when the cylindrical casing film 1 is folded flat, in other words, the length of the circumference of the cylinder, which is 172 mm. Further, the casing film used is a stack of two films having a thickness of 20 μm, or a single film having a thickness of 40 μm. The reinforcing film 5 may also be a two-layered film or a single film. For example, the reinforcing film tape 5 has a width W of 4 mm,
The length H is approximately 22mm, which is the same as the folding width of the casing film.
A size of 1 is used. After the reinforcing film tape 5 is ultrasonically welded to the flat portion 1a, the thickness T of the seal line A portion is ideally about 0.05 to 0.1 mm. Furthermore, as shown in FIG. 2, if a notch 4 is cut into the edge of the flat portion 1a at both ends or either side of the casing film 1, the casing film 1 can be easily torn from the notch 4. This allows the casing film 1 to be easily peeled off from the packaged object. Next, an apparatus for manufacturing the above-mentioned package will be explained. In FIG. 3, reference numeral 11 indicates a supply pump, and reference numeral 12 indicates a filling nozzle. Processed meat, etc. when manufacturing sausages is pressurized by this supply pump 11,
It is supplied from the filling nozzle 12. A forming member (forming plate) 13 is provided around the illustrated upper part of the filling nozzle 12.
is provided. The strip-shaped casing film 10 drawn out from the original film 14 is guided by guide rolls 15a and 15b, and is formed into a cylindrical shape by the forming member 13. Further, high frequency electrodes 16 and 17 are provided at a lower position of the molded member 13 to face each other. be done. This welded seal line is designated by the reference numeral 2 in FIG. The cylindrical casing film 1 is formed through the above steps. And by the filling nozzle 12,
This cylindrical casing film 1 is filled with an object to be packaged. A film feed roller 18 is located below the filling nozzle 12.
and 19 are provided, and the cylindrical casing film 1 is continuously sent downward by the film feed rollers 18 and 19. Furthermore, a pair of squeeze rollers 21 are provided on the lower side. The pair of squeezing rollers 21 are driven in a direction in which they come into pressure contact with each other and move away from each other. The casing film 1, which is fed downward while being filled with processed food, has its contents squeezed out by the intermittent pressing action of the squeezing roller 21, so that only a part of the casing film becomes flat. Narrowed down to. A welding unit 30 is arranged below the squeezing roller 21. This welding unit 30 is built into a table (not shown) that reciprocates up and down, and in particular, the speed when descending is approximately the same as the descending speed of the cylindrical casing film. The welding unit 30 welds and cuts the portion squeezed into a flat shape by the squeeze roller 21. FIG. 4 shows the structure of the welding unit 30. code 3
1 and 32 are pressure plates 0 A pair of pressure plates 31 placed on one side are vertically spaced apart from each other, and a pair of pressure plates 32 placed on the other side face the pressure plates 31. They are arranged one above the other. One of the pressing plates 31 has a flat pressing surface 31a at its tip, and the other pressing plate 32 has a flat pressing surface 32a at its tip. Each press plate 31
and 32 are reciprocated by a drive mechanism (not shown). As shown in FIG. 4, when both pressing plates 31 and 32 advance in the direction in which they come into pressure contact with each other, the squeezing roller 2 shown in FIG.
The flat portion 1a of the casing film 1, which has been flattened by the pressing plate 1, is further pressed into a flat state by both pressing plates 31 and 32. Further, an anvil 33 is provided in the middle of one of the pressing plates 31, and an ultrasonic horn 34 is provided in the middle of the other pressing plate 32. As shown in Figure 3, the ultrasonic horn 3
4 is connected via a converter 36 that converts high frequency waves into ultrasonic waves and a booster 35 that amplifies the ultrasonic waves. The anvil 33 and the ultrasonic horn 34 can be moved forward and backward relative to each other by a drive mechanism, and when both move forward and backward by this drive mechanism, the pressure surface 3 at the tip of the anvil 33
3a and the pressing surface 34a at the tip of the ultrasonic horn 34, the flat portion 1a of the casing film 1 and the reinforcing film tape 5 are sandwiched under a predetermined pressure. Further, a pair of second pressing plates 39 are provided inside the anvil 33. The tip of this pressing plate 39 is connected to the pressing surface 3 of the ultrasonic horn 34.
It faces 4a. This pressing plate 39 also has a flat tip. As shown in FIG. 4, a cutter 37 is provided between the pair of second pressing plates 39. This cutter 37 is supported by a cutter base 38. The cutter base 38 is driven to move forward slightly behind the forward movement of the anvil 33, and this forward movement cuts the central portion of the flat portion 1a of the casing film 1. At this time, the second pressing plate 39 and the pressing surface 34a
By sandwiching the flat portion 10 between the two, the cutter 37 assists the operation of cutting the flat portion 1a. Further, the groove 34b formed in the ultrasonic horn 34 functions as a blade for the cutter 37. Reference numeral 5 is a reinforcing film tape. In the embodiment shown in FIG. 4, four reinforcing film tapes 5 are supplied by a tape guide (not shown) and
3a and in front of the pressure surface 34a of the ultrasonic horn 34. Although not shown, the welding unit 30
Inside is a reinforcing film tape 5 welded to the casing film 1 by an anvil 33 and an ultrasonic horn 34.
A cutting member is provided for cutting the material to a length H shown in FIG. In the embodiment shown in FIG. 4, four reinforcing film tapes 5 are supplied on both sides of the flat part 1a, but a total of two wide reinforcing film tapes 5 are provided, one on each side of the flat part 1a. may also be supplied. In this case, the reinforcing film tape 5 welded to the flat portion 1a is cut together with the flat portion 1a by the cutter 37 while being sandwiched between the second pressing plate 39 and the pressing surface 34a. Next, a method for manufacturing a package using the above manufacturing apparatus will be explained. The casing film 1 is made of, for example, a copolymer resin of vinylidene chloride and vinyl chloride that is biaxially stretched by an inflation method, and has a thickness of 20 μm.
A single film having a thickness of about 40 μm or a stack of two films having a thickness of about 40 μm is used. Further, the reinforcing film tape 5 is made of, for example, a film obtained by biaxially stretching a copolymer resin of vinylidene chloride and vinyl chloride by an inflation method or the like. The reinforcing film tape 5 is a two-layered one or a single film with a thickness of about 20 to 90 μm, and the thickness is arbitrarily selected depending on the welding conditions and the like. As shown in FIG. 3, the strip-shaped casing film 10 pulled out from the original fabric 14 is formed into a cylindrical shape by a forming member (forming plate) 13, and the casing film is moved at a constant speed by film feed rollers 18 and 19. is sent downward. The edges of the cylindrically shaped strip casing film 10 are brought together and welded by high frequency electrodes 16 and 17 (see reference numeral 2 in FIG. 1). A supply pump 11 and a filling nozzle 1 are placed inside the cylindrical casing film 1 thus formed.
From step 2, the packaged items such as processed meat are filled. The cylindrical casing film 1 filled with the object to be packaged is intermittently squeezed into a flat shape by the pressing operation of a pair of squeezing rollers 21 . Furthermore, in the welding unit 30 that reciprocates up and down, first, the pressing plates 31 facing both sides of the casing film 1
and 32 are driven in the direction in which they approach each other, and the flat portion 1a, which is squeezed by the squeezing roller 21,
It is further pressed by the pressing surfaces 31a and 32a of 1 and 32. A little later than the operation of the pressing plates 31 and 32, the anvil 33 and the ultrasonic horn 34 move forward, and the pressing surface 33a of the anvil 33 and the pressing surface 34a of the ultrasonic horn 34 push the side of the flat portion 1a. The reinforcing film tape 5 and the casing film at the flat portion 18 are sandwiched together. Then, under the contact pressure between the anvil 33 and the ultrasonic horn 34, the flat portion 1a of the cylindrical casing film 1 and the reinforcing film tape 5 are ultrasonically welded together. After the rough welding operation is completed, the cutter base 38 advances and cuts the middle of the upper and lower welded parts of the casing film 1. During cutting, the flat portion 1a is sandwiched between the second pressing plate 39 and the pressing surface 34a. In addition, if a V-shaped auxiliary blade is integrally provided in a part of the blade of the cutter 37, when the flat part 1a of the wrap film 1 is cut by the cutter 37, the auxiliary blade will be used as shown in FIG. It is possible to mold together the notch shown at 4. In this case, it is necessary for the receiver of the ultrasonic horn 34 to provide a blade opposite to a V-shaped auxiliary blade at the edge of the groove 34b that serves as a blade. This cutting operation produces individually separated packages as shown in FIG. As shown in FIG. 2, in the manufactured package, the flat parts 1a at both ends of the cylindrical casing film 1 are welded together with the reinforcing film tape 5. As shown in the experimental results described later, in this flat part 1a,
Since the casing film 1 and the reinforcing film tape 5 are welded together, the strength of the welded part is higher than that in the case where only the casing film 1 is welded. Even if the internal pressure of the package becomes high, the welded portion of the flat portion 1a can sufficiently withstand it. One of the reasons why the strength of the welded portion can be increased by using the reinforcing film tape 5 in this way is as follows. If the reinforcing film tape 5 is not used, the thickness of the welded part of the casing film 1 will be less than the original thickness of the casing film due to the contact pressure between the anvil and the horn. This is because when using the welded portion, the thickness of the welded portion can be kept equal to or greater than the original thickness of the casing film 1. In the above embodiment, the reinforcing film tape 5 is attached and welded to the flat part 1a of the casing film 1 from both sides, but even if the reinforcing film tape 5 is attached and attached to only one side of the flat part 1a. , it is possible to increase the strength of the welded part to some extent. Further, in each of the above embodiments, the same effect can be expected even if the welding means for welding the casing film 1 and the reinforcing film tape 5 is high frequency welding. Next, FIG. 5 shows a second embodiment of the package according to the present invention. In this package, as in the package shown in FIGS. 1 and 2, the ends of the casing film 1 formed into a cylindrical shape are crushed to form a flat part 1a.
The edges of a are folded back and folded. Then, the folded portion 1b and the flat portion 1a form 4 layers (when the casing film 1 is one film) or 8 layers (when the casing film 1 is a film made of two layers stacked together). The seal part A is formed by sonic welding. That is, the folded portion 1b functions in the same manner as the reinforcing film tape 5 shown in FIG. 2, and the welding strength of the flat portion 1a is increased by welding four or eight layers of film. [Experimental Results] The results of the strength test of the package having the above-mentioned welded portion will be explained. The band-shaped casing film 10 (cylindrical casing film 1) is made of a copolymer resin with a polymerization composition ratio of 80 parts by weight of vinylidene chloride and 20 parts by weight of vinyl chloride, a plasticizer, and a stabilizer. , a lubricant and a matte finish agent are mixed, heated and melted using a melt extruder, and extruded through a tubular nozzle.
After quenching, the film was biaxially stretched by an inflation method and used. The casing film is made by stacking two films with a thickness of about 20μm, or a film with a thickness of about 40μm.
A single film with a folding width of about 22 mm was used. The reinforcing film tape 5 contains 77 parts by weight of vinylidene chloride,
A plasticizer, a stabilizer, a lubricant, and a matte finish agent are mixed with a copolymer resin having a polymerization ratio of 23 parts by weight of vinyl chloride, heated and melted using a melt extruder, extruded through a tubular nozzle, and after quenching, the inflation method is performed. The film was biaxially stretched by the following methods. The dimensions of the reinforcing film tape 5 are:
The width W shown in FIG. 2 was about 4 mm, and the length H was about 22+ nm in accordance with the folding width of the casing film 1. In addition, eight types of films were produced, either two stacked films or a single film, each having a total thickness of 20 μm to 90 μm, each differing by 10 μm, and experiments were conducted on each film. As a result of the sealing strength of the welded portion, a cylindrical casing film 1 was produced by molding the band-shaped casing film 10 made of the above-mentioned material into a cylindrical shape. As shown in the first embodiment of FIG. 2, one end of the tape is crushed and formed into a flat shape, reinforcing film tapes 5 are attached to both sides of the flat part, and welded using an ultrasonic horn of 350 W at 40 KHz. Welding thickness T is approximately 0.05[111!1~
A welded part of 0.1 mm was formed. This was used as an experimental sample corresponding to the present invention. In addition, as a comparison sample, one end of the casing film 1 formed into a cylindrical shape was crushed to make it flat, and the flat part was welded with a 350 W ultrasonic horn at 40 K)Iz without adding the reinforcing film tape 5. used. In the experiment, an air nozzle was inserted into the open end of a cylindrical casing film, one end of which was welded using the method described above, and the film was tightened with a rubber tube at a position approximately 300 mm away from the flat welded part to prevent air from leaking. state. This was submerged in water, air pressure was gradually applied, and the gauge pressure (CKg/cm') at the time when air leakage occurred was measured. Note that the folding width of the cylindrical casing film 1 was 22 mm. The experimental results are shown in Table-1. In the table below,
For sealing conditions, the number on the left is the contact pressure between the ultrasonic horn and the anvil (Kg/cm2), and the number on the right is the amplitude (μm).
It is. The unit of thickness of the reinforcing film tape is (μm). The seal strength is determined by the gauge pressure (Kg/cm2)
), and the measurement limit is 2.0 Kg/Cm2. The number of samples was 50 for each condition. Table 1 From Table 1 above, even if the edges of the casing film are sealed by welding the flat parts in the same way, those using reinforcing film tape 5 are better than those not using reinforcing film tape 5. It can be seen that the seal strength is much higher. Also, depending on the sealing conditions, 2.0Kg/cm2
Since the above pressure resistance strength can be obtained, it has been confirmed that the present invention can be sufficiently applied to packaging bodies to be subjected to a retort process. As a result of the rupture test of the package, a casing film made of the above-mentioned material was formed into a cylindrical shape, the inside of which was filled with water, and both ends were crushed and flattened as shown in the first embodiment shown in Figures 1 and 2. A package having a length of 180 mm was produced by shaping the shape, attaching reinforcing film tapes 5 to both sides of the flat part 1a, and welding them using an ultrasonic horn of 350 W at 40 KHz. The thickness T of the welded portion is approximately 0.05 to 0.1 mm. This was used as an experimental sample corresponding to the present invention. As a comparison sample, a casing film 1 formed into a cylindrical shape was filled with water, both ends were crushed to make it flat, and this flat part was heated using an ultrasonic horn of 350 W at 40 KHz without adding the reinforcing film tape 5. Welding was performed to produce a package with a length of 180 mm. For each sample above, pressure 2.2Kg/cm2, temperature 120
Retort sterilization at ℃ was performed for 15 minutes. Note that the folding width of the cylindrical casing film was 22 mm. The experimental results are shown in Table-2. In the table below, the sealing conditions are as follows: The numbers on the left indicate the contact pressure between the ultrasonic horn and the anvil (g
/cm'), and the value on the right is the amplitude (μm). The unit of thickness of the reinforcing film tape is (μm). In addition, the numerical value of the destruction ratio is the number of sample packages under each condition, which is 50.
It shows the number of sample packages destroyed for each book. That is, in the fracture ratio, the denominator is the number of samples subjected to the experiment, and the numerator is the number of samples destroyed. (The following is a blank space) Table 2 As mentioned above, most of the cylindrical casing films that are flattened at both ends and welded without using a reinforcing film tape are destroyed during the retort process. On the other hand, the number of broken packages in which the flat parts are welded using the reinforcing film tape 5 as in the present invention is extremely small, and depending on the sealing conditions, no breakage occurs during the retort process. Therefore, it has been confirmed that the packaging body of the present invention can be put to practical use even when packaging items such as sausages that require a retort process. Note that in the present invention, the film material is not limited to a copolymer of vinylidene chloride and vinyl chloride, and the same effect can be expected even if other resins are used. Other resins that can be used for ultrasonic welding include, for example, vinylidene chloride-based copolymers made of vinylidene chloride and a copolymerizable monomer, or films made of polyvinyl chloride. Furthermore, even when the packaging according to the present invention is applied to products such as ham that are vacuum-packaged and then boiled after packaging, the sealing strength can be increased, and the sealing part does not break during the boiling process, which prevents vacuum return. It will be possible to prevent this. Furthermore, even if the packaging according to the present invention is used for products that do not require heat treatment, such as stick cheese,
A novel packaging form can be provided, and a completely sealed package can be provided. (Effects of the Invention) As described above, according to the present invention, it is possible to provide a completely new package for sausages, etc., which is different from the one using wire clips made of aluminum or the like as shown in Fig. 6. As a result, it becomes possible to renew the image of sausages, etc., and increase the desire to purchase them through packaging.In addition, by attaching reinforcing film to the flat part of the cage and packaging film and welding it, This makes it possible to increase the sealing strength of the packaging body of the present invention, making it possible to use the packaging body for foods that undergo heat treatment such as retorting or boiling. FIG. 2 is a partial perspective view showing the welded end portion of the package shown in FIG. 1; FIG. 3 is a schematic front view showing an embodiment of the package manufacturing apparatus according to the present invention. 4 is a partial front view showing a welding unit of a packaging manufacturing apparatus, FIG. 5 is a partial perspective view showing a second embodiment of a packaging according to the present invention, and FIG. 6 is a conventional packaging. It is a perspective view. 1... Cylindrical casing film, 1a... Flat part of casing film, 5... Reinforcement film tape, 1
0... Band-shaped casing film, 12... Filling nozzle, 13... Molding member, 16.17... High frequency electrode constituting the sealing mechanism, 18.19... Film feed roller, 21... Aperture roller 3, which constitutes the aperture mechanism
0... Welding unit, 31, 32. 39... Pressing plate, 33... Anvil constituting the ultrasonic welding mechanism, 34
...Horn constituting the ultrasonic welding mechanism, 37...Cutter. Figure 1 5 ゛≠ Autopsy film tearer Figure 3 Figure 6

Claims (10)

[Claims] (1) The edges of the casing film are joined together to form a cylindrical shape, the inside of which is filled with the object to be packaged, and both ends of the casing film are crushed to form a flat shape, and this flat part If the casing film is one film, it has three or more layers including this casing film, or if the casing film is two films stacked together, it has five or more layers including this casing film. A package consisting of two films welded together. (2) The package according to claim 1, wherein a reinforcing film is attached to one or both outer surfaces of the flat part, and the casing film and the reinforcing film are welded together at the flat part. . (3) The edge of the casing film is folded at the flat part, and if the casing film is one film, there are 4 layers, or 2 casing films, including this folded part at the flat part. 2. The package according to claim 1, wherein eight layers of films are welded together when the films are stacked. (4) The package according to claim 1, 2, or 3, wherein the film is welded at the flat portion by ultrasonic waves. (5) Form the casing film into a cylindrical shape, join the edges together, fill the cylindrical casing film with the item to be packaged, and fill the part that will become the end of the package with the item to be packaged. The casing film is crushed to form a flat part, and in this flat part, if the casing film is one film, three or more layers including this casing film, or the casing film is two films. A method for manufacturing a packaging body, in which five or more layers of films, including the casing film, are welded together when the casing film is laminated. (6) The method for producing a package according to claim 5, wherein a reinforcing film is supplied to one or both outer surfaces of the flat portion, and the casing film and the reinforcing film are welded together. (7) Fold the casing film at the flat part, and when the casing film is one film, there are four layers, or the casing film is two films stacked together, including this folded part at the flat part. 8 in some cases
A method for manufacturing a package according to claim 5, which comprises welding the layers of film. (8) The method for manufacturing a package according to claim 5, 6, or 7, wherein the film is welded at the flat portion using ultrasonic waves. (9) A forming member that forms the casing film into a cylindrical shape, a sealing mechanism that joins the edges of the casing film formed into the cylindrical shape by the forming member, and a material to be packaged that is filled into the cylindrical casing film. a filling nozzle, a squeezing mechanism that partially crushes a cylindrical casing film filled with an object to be packaged to form a flat part, and a reinforcing film supply mechanism that supplies a reinforcing film to the outside of the flat part of the casing film; A packaging manufacturing device comprising a welding mechanism for welding together a flat casing film and a reinforcing film. (10) The package manufacturing apparatus according to claim 9, wherein the welding mechanism is an ultrasonic welding mechanism comprising a horn and an anvil that sandwich the flat part of the casing and the reinforcing film.