JPH0629046B2 - Filling and packaging method of goods - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of filling and packaging an article such as food in a container, and more specifically, after filling the article in the container, the container and the lid. The present invention relates to a packaging method for performing heat sealing with a material.

(Prior Art and Problems Thereof) A package in which a container provided with a heat-sealing flange and a lid are sealed by heat sealing is widely used as a heat-sealing container in various fields such as food packaging.

Such a package can be obtained by filling an article such as food in a pre-filled container, then transporting it to the heat-sealing work area and performing heat-sealing with the lid.

However, according to such a conventional technique, when a container is filled with an article such as a liquid or an article containing liquid juice or a powder, the article adheres to the container flange portion and the heat-sealing planned portion is contaminated. It may be done. Also, after filling,
Even when the container is transported to the heat-sealing work area, the articles are scattered depending on the transportation conditions, the planned heat-sealing portion is contaminated, and the surroundings are apt to become unsanitary. In particular,
Contamination of the heat-sealing planned portion not only causes variations in heat-sealing strength between the container and the lid, but also significantly impedes heat-sealing in the article, for example,
If it contains solids or fibers, it may cause poor sealing and is not desirable in terms of quality.

In many cases, in order to solve the above-mentioned problems, it is general that the conveying speed of the filling container is set low and the heat sealing time is set to a relatively long time of 1.5 seconds to 2 seconds. In addition, if you are targeting articles that are prone to poor sealing,
After the filling, a measure is taken to manually remove the deposit on the planned heat-sealing portion. For this reason, the reality is that productivity is low. In particular, in the case of a filling and sealing machine that is used for a wide variety of products, such as liquid products to solid products, adjust the transfer speed for each target product. However, since the transport speed is generally set to the slowest in the worst case, the productivity is extremely low.

For the above reasons, it has been extremely difficult to improve quality and productivity at the same time in the prior art.

(Means for Solving the Problems) The present invention provides the above-mentioned problems by providing an intermediate film having a filling opening smaller than the container opening in the container flange before filling the container with the article. It is a solution to the problem.

That is, according to the present invention, the intermediate film is supplied by the lid member so as to cover the opening of the container to be sealed with the flange portion, and the flange heat-sealing planned portion of the container and the intermediate film are heat-bonded to each other. Forming an opening for filling smaller than the container opening in the intermediate film in any of the front and rear, filling an article in the container through the opening, and then with the intermediate film in the flange heat-sealing planned portion of the container. There is provided a method for filling and packaging an article, which comprises thermally bonding a lid material.

(Operation) In FIG. 1 showing the steps of the packaging method of the present invention, first, a cup-shaped container body 2 having a heat-sealing flange 1 is provided.
With respect to, the intermediate film 3 is supplied so as to cover the opening, and heat sealing is performed between the flange 1 and the intermediate film 3 (step (A)).

Next, the film 3 is filled with a filling opening 4 smaller than the opening formed in the container body 2 by means such as punching.
Are formed (step (B)).

In this case, it is of course possible to form the preliminary filling opening 4 in the film 3 and heat seal the container body 2 in this state.

Then, an article 6 such as a liquid food is filled from the filling nozzle 5 into the container body 2 through the filling opening 4 (step (C)).

In the present invention, the container body 2 in which the intermediate film 3 is heat-sealed and the articles 6 are filled is conveyed to the next heat-sealing work area, and the lid material 7 is heat-sealed to the intermediate film 3 in the area. Thus, a package filled with the contents is formed (step (D)).

That is, according to the present invention, when the container 6 is filled with the article 6, the intermediate film 3 acts as a shielding plate for preventing the article 6 from scattering outside the container, and in the step (C), By appropriately selecting the shape, size and position of the filling opening 4 when filling not only a solid material but also an article 6 containing a liquid or juice that is relatively easily scattered or an article 6 such as powder. It is possible to set the filling speed faster. Further, when filling a solid matter or a fluid article 6 having a relatively high viscosity, or an article 6 made of a solid matter and a liquid juice having a relatively high viscosity, the container body 2 is rotated during or after the filling, By swinging or vibrating the articles 6, it is possible to prevent the articles 6 from being piled up in the container, and it is possible to quickly permeate the highly viscous juice into the solid matter.

Further, even when the article 6 is accidentally attached to the vicinity of the container flange portion 1 at the time of filling, since the intermediate film 3 is bulged out to the inside of the container flange portion 1, not only the manual attachment of the adhered matter in the heat seal scheduled portion is required. A device that uses a method such as suction enables easy and quick removal.

Further, according to the present invention, even when the container is transported from the work area in which the step (C) is performed to the heat seal work area in the step (D),
Since the intermediate film 3 has the function as the shielding plate, it is possible to set the conveying speed to be high.

Further, according to the present invention, it is possible to prevent contamination of the portion to be heat-sealed by the article 6, so that when the lid 7 is heat-sealed, the heat-sealing strength varies and a sealing failure occurs. Effectively avoided. Therefore, the quality is improved and the heat sealing time can be shortened.

As a result of the above, according to the present invention, it is possible to improve quality and productivity at the same time.

Further, according to the present invention, in connection with the intermediate film 3 being interposed between the lid 7 and the container body 2, the seal 10 between the container body 2 and the intermediate film 3 and the intermediate film 3 are provided.
By providing a difference in the seal strength between the seal 11 and the seal 11 between the lid 7 and the lid 7, peeling from the outside of the container is easy, and peeling or breaking strength from the inside of the container is, for example, It is possible to have a seal structure with a strength of 2.3 kg / 15 mm width or more.

For example, in FIG. 2-A showing an example of the seal structure,
The seal 10 is a tight seal, and the seal 11 is an easily peelable seal.
a is regulated so as to be located outside the container with respect to the inner peripheral side edge 11a of the easily peelable seal portion 11.

In this case, the peeling force or destructive force P from the inside of the container is
It acts on the tight seal part 10, and as a result, against peeling force or destructive force from the inside of the container, for example, 2.3 kg / 15 mm
It is possible to obtain a seal structure that exhibits strength greater than the width and can withstand an increase in internal pressure due to retort sterilization or the like and a drop impact.

Further, in this aspect, as shown in FIG. 2-B, at the opening start portion, a part of the lid 7 is projected to the outside of the container more than the flange 1 to form the grip portion 20, and the outer peripheral side of the tight seal portion 10 is formed. The edge 10b is regulated so as to be positioned outside the container with respect to the outer peripheral side edge 11b of the easily peelable seal portion 11.

That is, the peeling force P from the outside of the container is the peelable seal portion 1
As a result, the peel strength becomes, for example, 2 kg / 15 mm width or less, and the peeling and unsealing can be performed easily by hand.

The advantages described above can be achieved even if the positional relationship between the tight seal and the easily peelable seal is reversed.

That is, as shown in FIG. 3-A, the seal 10 between the container flange 1 and the intermediate film 3 is an easily peelable seal, and the seal 11 between the intermediate film 3 and the lid 7 is a tight seal.

Also in this case, the inner peripheral edge 11 of the tight seal 11 is
The easily peelable seal 10 is regulated so as to be located outside the container with respect to the inner peripheral side edge 10a.

As a result, the peeling force or the destructive force P from the inside of the container also acts on the tight seal portion 11, and the peeling strength of 2.3 kg / 15 mm width or more is obtained.

Similarly, at the opening start portion, as shown in FIG. 3-B, the outer peripheral edge 11b of the tight seal portion 11 is positioned outside the container relative to the outer peripheral edge 10b of the easily peelable seal portion 10. Regulated by. Further, in this case, the intermediate film 3 may be projected together with the lid 7 as the grip portion 20.

As a result, the peeling force P from the outside of the container at the opening start portion acts on the easily peelable seal portion 10, and the opening by hand is easily performed.

In the heat-sealing structure shown in FIGS. 2-A and 2-B, the intermediate film 3 remains on the container side after opening,
In the heat-sealing structure of FIGS. A and 3-B, the intermediate film 3 remains on the lid 7 side, and the flange portion 1 has a clean appearance.

(Preferred Embodiment of the Invention) Container Main Body and Lid The container main body and the lid can be formed of any container-forming material known per se, for example, resin, metal, paper, glass, ceramic or a laminate thereof. Suitable container bodies and lids are made of a resin having at least an inner surface and an intermediate film and a heat-sealing property, and include, but are not limited to, low-medium-high density polyethylene, isotactic polypropylene, and propylene. −
Olefin resin such as ethylene copolymer, ethylene-vinyl acetate copolymer, olefin resin graft-modified with ethylenically unsaturated carboxylic acid or its anhydride: polyamide or copolyamide resin having a relatively low melting point or low softening point : A polyester or copolyester resin having a relatively low melting point or a low softening point: a polycarbonate resin or the like. Further, these resins may be blended with an inorganic filler.

The container body may be a container formed of these resins alone, or may be a laminated container including a metal foil of aluminum, copper, tin plate, etc. as an intermediate layer. Further, it may be a so-called known metal container in which these metal materials are coated with a resin known per se such as a thermosetting resin or a thermoplastic resin.

Lid, aluminum foil, tin foil, copper foil, metal foil such as tin foil, ethylene-vinyl alcohol copolymer, vinylidene chloride resin, high oxygen barrier resin film such as nylon resin, biaxially oriented polyethylene terephthalate film,
A thermoplastic resin film such as a biaxially stretched nylon film or a polycarbonate film, various papers, or a laminate of these may be used as a base material, and the heat sealable resin layer described above may be laminated as an inner surface material.

Intermediate film The intermediate film is a film or sheet consisting of one or more layers of the heat-sealable resin described above,
Its thickness must be able to withstand at least the forces associated with unsealing, retort sterilization, drop impact, etc., but it generally varies from 15 to 1000 μm, especially from 30 to 1
It is preferably in the range of 00 μm.

Any method may be used as a method for producing the intermediate film, and if the intermediate film is a single layer, an injection method, a compression molding method, or the like is also possible, but in consideration of variations in thickness, a casting method or an inflation method is preferable. desirable. If the intermediate film is a multi-layer film, a co-extrusion method using a multi-layer die, or a method of extruding and coating a necessary layer on a preformed base material or laminating the base material and the base material by heat lamination or sand lamination Method etc. are mentioned.

In the present invention, specific examples of the shape of the filling opening formed in the intermediate film are shown in FIGS. 4-A to 4-C.

That is, the opening 4 is not limited to the one having a concentric circle shape with respect to the center of the container (Fig. 4-A), and may be, for example, the fourth
As shown in FIG. B, it may have an eccentric shape on one side of the container, or as shown in FIG. 4-C, it may have a cutout shape such as a cross cut. The filling opening 4 is
The shape and size must be at least capable of filling the target article, and the shape, size and position where the effects of the present invention can be exhibited.
That is, in order to maximize the effects of the present invention, the size of the opening 4 is slightly larger than the outer diameter of the filling nozzle to be used, or the size of the filling material when filling manually. It is desirable to set it and position it in the center of the container as much as possible. Generally, the outer diameter of the filling nozzle for filling a fluid article is in the range of 5 to 15 mm, and the outer diameter of the filling nozzle for solid objects such as fruits is also within the range of 30 mm. 10 to 35 mm
It should be in the range of. However, for example, in the container shown in FIG. 4-A, when the space between the opening end edge 4a of the opening 4 and the inner peripheral edge 1a of the container flange portion 1 is sufficient,
The opening 4 may be enlarged without being restricted by the above range. The interval between the opening edge 4a and the inner peripheral edge 1a is appropriately selected depending on the shape and size of the container, the filling material, the filling amount, the filling method, the conveying method, the conveying speed, and the like, but at least 2 mm or more, particularly It is preferable to set it within the range of 5 mm or more.

That is, if this interval is too narrow, it becomes difficult to achieve the main object of the present invention to prevent the articles filled in the container body from scattering outside the container at the time of filling or transporting, and especially filling the liquid material. In this case, there arises a disadvantage that the filling speed or the conveying speed cannot be increased.

Heat Seal Structure In the present invention, in order to form a tight seal on one side of the intermediate film and form an easily peelable seal portion on the other side, heat sealing between the intermediate film and the inner surface material of the lid or the inner surface material of the container is performed. Take advantage of differences in strength.

For example, when the intermediate film is a polypropylene film, a tight seal is formed if the inner surface of the lid or the inner surface of the container is made of polypropylene. In addition, the inner surface of the lid or the inner surface of the container is polypropylene and other polymers,
For example, polyethylene, ethylene-vinyl acetate copolymer,
If formed of a blend of ethylene-propylene rubber or the like, an easily peelable seal is formed. Further, when the intermediate film is a polypropylene layer and is composed of a laminated structure of the blend layer and the inner surface of the lid and the inner surface of the container are both formed of polypropylene, a tight seal is provided on the polypropylene layer side and an easily peelable seal is provided on the blend layer side. Will be formed. These examples also apply to heat-sealable resins such as polyethylene, polyester and polyamide.

Further, it is known that a polyolefin film has a heat-sealing property with respect to a given coating film. That is,
The polyolefin film exhibits excellent heat-sealing property with respect to the coating film in which the oxidized polyethylene or the acid-modified olefin resin is dispersed. By providing this coating film on the inner surface of the lid or the inner surface of the container, the dispersion amount of the polyethylene oxide or the acid-modified olefin resin, or the dispersion amount of the third component that further hinders the heat-sealing property can be adjusted to one side of the polyolefin film. It is possible to form a tight seal and an easily peelable seal on the other side. This tendency also applies to resins such as polyester and polyamide, which exhibit heat sealability with paints.

Macroscopically, the peeling at the easily peelable seal part appears to be due to interfacial peeling between the intermediate film and the inner surface material of the lid or between the intermediate film and the inner surface material of the container. Destruction phenomena such as interfacial peeling at the interface, cohesive failure near the interface, or delamination at the interface are performed individually or in a state in which each phenomenon is combined.

The position of the inner peripheral side and outer peripheral side edges of the easily peelable seal part and the inner peripheral side and outer peripheral side edges of the tight seal part can be regulated by any means. In the simplest case, when the heat-sealing head is heat-sealed to the lid or the container flange of the intermediate film, the shape and position of the heat-sealing head can be regulated to control the positions of the inner and outer edges thereof. it can.

As another method, a non-adhesive coating that defines the inner and outer edges of the heat-sealed portion is printed, applied, vapor-deposited, welded, or formed on the flange surface or the inner surface of the lid by a thin-film forming technique known per se. Alternatively, it can be applied to the intermediate film to regulate the positions of the inner and outer peripheral edges of the heat seal portion.

In the present invention, by providing a heat seal surface of different adhesive strength such as a tight seal portion and an easily peelable seal portion via the intermediate film, by regulating the positions of the inner peripheral side edge and the outer peripheral side edge thereof. It is possible to give a predetermined difference between the peeling or breaking strength from the center side of the container and the peeling strength from the outside of the container. Furthermore, this difference is due to appropriate selection of conditions such as the adhesive strength of the tight seal portion and the easily peelable seal portion, the positional relationship between the inner peripheral edge and the outer peripheral edge of each seal portion, and the material strength of the intermediate film. It is set arbitrarily. For example, in order to achieve both good sealing performance and unsealing performance, the difference in adhesive strength between the tight seal portion and the easily peelable seal portion should be increased. For example, the tight seal portion should have a width of 2.5 kg / 15 mm or more, preferably 3kg or more, 0.2kg / 15mm width or more and 2kg / 15mm width or less, preferably 0.4kg / 15mm width or more for easily peelable seal part
1.5kg / 15mm width or less, the positional deviation of the inner edge and outer edge of each seal is 0.5mm or more,
Desirably, the distance is 1 mm or more, and practically, the positional deviation amount on the inner peripheral side edge side is 5 mm or less. Further, it is preferable that the intermediate film has a material property or material thickness that is hard to stretch and has a sharp edge.

In the case of applying the packaging obtained by the present invention to the use of sterilizing the contents by retort sterilization or boil sterilization, or sterilizing by hot filling, the inner surface material of the container and the lid is a polypropylene resin from the viewpoint of heat resistance. It is generally composed of As an intermediate film particularly suitable for this use, a polypropylene layer having a thickness of 15 to 1000 μm, particularly 30 to 100 μm, and a crystalline propylene-ethylene having an ethylene content of 10% or less and a thickness of 1 to 100 μm, particularly 3 to 50 μm. There may be mentioned an intermediate film composed of a random copolymer and a blend layer of 90:10 to 50:50 with polyethylene.

The polypropylene layer is made of homopolypropylene or a propylene-ethylene block copolymer having an ethylene content of 10% or less, or in order to improve the heat sealability of the surface on the side where a tight seal is formed on the outside of this layer. Those having a crystalline propylene-ethylene random copolymer layer having an ethylene content of 10% or less are preferable. Further, the polypropylene layer may be blended with different components to the extent that the physical properties of the film are not deteriorated,
The blend layer may contain propylene-ethylene rubber or the like as the third component.

Apparatus In the present invention, generally, an apparatus for applying an intermediate film, a filling apparatus, a heat sealing apparatus or a filling sealing apparatus is used. Although an arbitrary device is applied to each of them, in the present invention, even a stackable cup cannot be stacked after the intermediate film 3 is attached. Therefore, the device for adhering the intermediate film is preferably one line with the filling device, the heat sealing device or the filling and sealing device, or it is preferable that all the devices are incorporated in one device. FIG. 5 is a device diagram showing an example thereof. The cup 2 is fixed to a pedestal and is intermittently conveyed from the left side to the right side in the drawing, and the raw material of the intermediate film 3 is supplied from a roll 21. The original film of the intermediate film 3 is attached to the cup 2 from the heat seal head 22,
The saw blade 23 or the rotary blade 23 forms a filling opening, and scrap is removed. After the articles 6 are filled by the filling nozzle 24, the lid material 7 supplied from the roll 25 is heat-sealed by the heat-sealing heads 26 and 27. Thereafter, the saw blade 28 separates the container from the original film of the intermediate film 3 and the lid member 7. The scrap of the intermediate film 3 and the lid material 7 is wound on the roll 29. In this device, since the raw material of the intermediate film 3 covers the pedestal from the time when the articles 6 are filled to the time when the scrap is wound up on the roll 29, it is said that the contamination of the apparatus by the articles 6 is effectively prevented. There are also advantages.

(Effect of the Invention) According to the present invention, in the process of filling a package with an article and the process of transporting the package after filling, the scattering of the content outside the container is effectively suppressed, and as a result, the article to be filled Even if it is a liquid or powder that easily scatters, it is possible to increase the filling speed and the conveying speed. It is also possible to apply rotation such as inversion, or add vibration or swing.

Further, as described above, the inconvenience that the heat seal portion is contaminated by the content is effectively avoided in connection with the prevention of the scattering of the content, and further, the heat seal portion is contaminated by the content. However, since the intermediate film projects to the inside of the flange portion of the container, it is possible to easily and quickly clean the heat-sealed portion using a suction device or the like. As a result, a reliable and stable heat seal is formed, and this packaging method can be applied to a so-called aseptic filling method.

Thus, according to the present invention, it is possible to improve quality and productivity at the same time.

Further, the package obtained by the present invention is useful for applications such as retort sterilization, and can form a seal structure having excellent heat-resistant sealing property and easy-open seal.

The invention is illustrated by the following example.

Examples and Comparative Examples As a lid member, a 12 μm biaxially stretched polyethylene terephthalate film and a 7 μm soft aluminum foil were laminated with a urethane adhesive on the aluminum side of a base material, and a 70 μm ethylene content of 4% was used as a heat seal layer. Propylene-ethylene block polymer and ethylene content 4%
A coextruded film (thickness ratio 7: 3) composed of the propylene-ethylene random copolymer of (3) was laminated with a urethane adhesive so that the random copolymer side became the heat-sealing surface.

As a cup-shaped container, an unstretched polypropylene film of 40 μm on one side and 70 μm on the other side of a surface-treated steel foil of 75 μm is laminated with a urethane-based adhesive, and then this laminated body becomes a heat-sealing side on the film side of 70 μm. Deep drawing, and further, width 5mm (outer diameter 75μm, inner diameter 6
5 μm) Depth 3 with heat seal flange formed
A circular container having a volume of 0 mm and a volume of 85 cc was prepared.

As an intermediate film, 10 μm of a propylene-ethylene random copolymer (A layer) having an ethylene content of 4% and 4
A 6 μm homopolypropylene layer (B layer) and a 4 μm blend layer obtained by blending a propylene-ethylene random copolymer having an ethylene content of 4% with 36% by weight of linear low density polyethylene and 2% by weight of ethylene-propylene rubber. A three-layer coextrusion film consisting of (C layer) was prepared.

First, a film having a circular opening and a notched filling opening that is orthogonal to each other is cut out from the original film of the intermediate film, and the heat-sealing flange surface and the C layer of the intermediate film are covered so as to cover the opening of the cup-shaped container. Side and 200
It was heat-bonded (easily peelable seal) under the condition of ° C-0.8 seconds. At this time, as shown in Table 1, the shape of the opening is circular,
With the opening located in the center of the container (cups A, C,
D, E, G), the one that is eccentric from the center of the container by 5 mm (cup B), and the one that is positioned at the center of the container with the opening cut (cup F). (Note that the cup G is a container for a comparative example in which the inner peripheral edge of the flange and the opening edge of the intermediate film are aligned with each other).

After this, in the container cream corn soup, boiled meat and vegetables,
A water can was filled. After the filling, the layer A side of the intermediate film and the lid inner surface material were heat-sealed (tight seal) and sealed, and sterilized by retort. Table 2 shows filling conditions and sterilization conditions for each content.

The easily peelable seal portion and the tight seal portion of the thus-produced hermetic container had a structure similar to that of the seal shown in FIGS. 3-A and 3-B. Heat sealing was performed by controlling the shape and position. The easily peelable seal portion had an inner diameter and an outer diameter of 66 mm and 74 mm, and the tight seal portion had an inner diameter and an outer diameter of 69 mm and 75 mm. Further, in the opening start portion, the shapes of the pedestal and the heat seal head were devised so that the intermediate film and the grip portion of the lid were bonded to each other on the outside of the flange.

A general series intermittent drive type device was used as the filling and sealing machine. The ratio of the transfer time to heat sealing time per shot is adjusted to 200 degrees: 160 degrees, and this device is always used at a production rate of 15 shots per minute (standard speed), considering liquid spillage during transfer. Has been done. However, in this experiment, by changing the pulley of the drive system, the production speed was varied in four stages of 15, 20, 25 and 30 shots per minute and used. At this time, the heat seal temperature was also reset according to the production rate. Further, the lid material was supplied as an original fabric.

The filling results for each filling are summarized below.

Cream, corn, soup 1 cup per minute in cups A, B, C and D shown in Table 1
Cream corn soup was filled at four production rates of 5, 20, 25 and 30 shots. Table 3 shows the state at the time of filling and sealing. When using cup G,
Under conditions of faster than 15 shots per minute (standard speed), the heat-sealed surface was contaminated with the contents, and at 25 shots per minute or more, the content volume was reduced by 10% or more of the set value due to liquid spillage during transport ( Comparative example 1). Up to 25 shots per minute when using cup A and up to 30 shots when using cups B, D and F, the heat-sealing surface is not contaminated by the contents, and the internal volume is almost the set value. (Examples 1, 2, 3, 4).

When the percentage of poor sealing of these filling containers was examined, no defective products were found under the condition that the heat-sealed surface was not contaminated by the contents, but 2 out of 50 under the contaminated conditions. Defective products were found at a rate of 3 from.

Boiled Meat and Vegetables In the meat and vegetable boiled, the containers of cups C and G shown in Table 1 were filled with only solids, then with liquid juice, and sealed at a production rate of 25 shots per minute.

When filling solids, use a filling machine different from the filling and sealing machine, rotate the container around the center of the container, and prevent the solids from being piled up in the center of the container due to centrifugal force. I tried. At this time, in the case of cup G, the liquid juice contained in the solid was scattered outside the container (comparative example 2), but in the case of cup C it was not scattered (example 5).

Further, even when the juice was filled, a considerable amount of the juice spilled out of the container in the cup G during transportation (Comparative Example 2).
However, cup C did not spill at all (Example 5). When the amount of the contents was examined at the stage when the sealing was completed, the amount of the cup G was less than the set value of 8 grams on average (Comparative Example 2). It was almost the same as the set value in Cup C (Example 5).

Water Yokan Water Yokan was filled in containers of cups E and G shown in Table 1 at a production rate of 15 shots per minute and sealed.

When the cup G was filled with water, an overflow of 2 to 3 cc was unavoidable even if a liquid level sensor was used, and the contents spilled out of the container during transportation. Therefore, the heat seal was a bite seal (Comparative Example 3).

On the other hand, when the cup E was used, the content was only slightly overflowed onto the intermediate film by using the liquid level sensor, and the heat seal surface was not contaminated. The contents did not spill out of the container during transportation, and the heat-sealed surface was not contaminated. Furthermore, the production rate was increased to 20 and 25 shots per minute, but the same result was obtained (Example 6).

Among the thus-obtained hermetically-filled containers, non-defective products were measured for peel strength and unsealing strength using a tensile tester. To measure the peel strength, cut a strip 15 mm wide at right angles to the direction of the heat seal, sandwich the strip side with the upper chuck and the side wall of the cup with the lower chuck, and vertically move at a speed of 300 mm / min. I pulled it.
As for the unsealing strength, the container is fixed to the cross head by inclining it by 45 °, and the lid and the grip for opening the intermediate film are simultaneously pinched by the upper chuck (the angle between the upper surface of the container and the grip of the lid is It was performed by pulling up and down at a speed of 300 mm / min.

The average peeling or breaking strength from the inside of the container is 3.
The width was 2 kg / 15 mm, and the strength was sufficient to withstand retort sterilization. The peel strength from the outside at the opening start portion was 0.9 kg / 15 mm width on average. The maximum value of the opening strength at the start of opening was 1.5 kg on average. When I selected an arbitrary container and opened it by hand,
It was easy to open.

The filling amount of 71 cc is an amount such that the distance from the liquid surface of the contents to the flange surface is about 5 mm, and 85 cc is the amount of full filling.

[Brief description of drawings]

FIG. 1 is a process diagram showing the packaging method of the present invention.
-A, FIG. 2-B, FIG. 3-A and FIG. 3-B are cross-sectional views illustrating the sealing structure of the container produced by the packaging method of the present invention. Fig. 4-B and Fig. 4-
FIG. C is a diagram illustrating a filling opening formed in the intermediate film, and FIG. 5 is a diagram illustrating an apparatus preferably used in the present invention. Imprinted number 1 is a heat sealing flange, 2 is a container body,
3 is an intermediate film, 4 is a filling opening, 5 is a filling nozzle, 6 is an article (contents) such as food, 7 is a lid, 10 is a seal between the container body 2 and the intermediate film 3, and 11 is an intermediate A seal between the film 3 and the lid 7, 20 is a grip for opening, 22, 26 and 27 are heat seal heads, and 23 and 28 are saw blades.

Claims (4)

[Claims] 1. An intermediate film is supplied by a cover member so as to cover an opening of a container to be sealed with a flange portion, and a flange heat-sealing planned portion of the container and the intermediate film are heat-bonded to each other before and after the heat-bonding. In either case, an opening for filling smaller than the opening of the container is formed in the intermediate film, an article is filled in the container through the opening, and then the intermediate film and the lid material are provided at a flange heat sealing planned portion of the container. And a method for filling and packaging an article, which comprises heat-bonding and. 2. The method according to claim 1, wherein the container is rotated, rocked or vibrated during or after filling the container with the article. 3. The method according to claim 1, wherein a tight seal is provided between the planned flange heat-sealing portion of the container and the intermediate film, and an easily peelable seal is provided between the intermediate film and the lid member. 4. The method according to claim 1, wherein an easily peelable seal is provided between the flange heat-sealing planned portion of the container and the intermediate film, and a tight seal is provided between the intermediate film and the lid member.