JPS5899366A - Sealed bag with spout - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] be.

Conventionally, regarding muichibukuro and its manufacturing method, for example,
As seen in JP 5-46144, a film Y containing polyvinylidene chloride on a polyethylene film
There is a method in which a bag consisting of a main body Y made of laminated multilayer film and a spout provided with a spout is exposed to sterilizing gas under high pressure, and the gas permeates the bag wall and fills the bag, sterilizing it. .

This manufacturing method for soda-free bags has the advantage that the bag is killed in a sealed state, so the state can be maintained as it is once removed from the gas chamber. The drawback is that it is difficult to remove the sterilizing gas that has filled the bag, and residual sterilizing gas tends to remain inside the bag.

Furthermore, when ethylene oxytide gas Y is used as a sterilizing gas, the chlorine in polyvinylidene chloride reacts with ethylene oxide, producing harmful shrimp chlorohydrin that has a high boiling point and is difficult to volatilize. isn't it.

Regarding the manufacturing method of 1 bag, for example, JP-A No. 55-15
It can also be found in the 1964 publication. This bag consists of an inner bag and an outer bag, the inner bag is made of a film with low gas barrier properties, and the outer bag is made of a film with high gas barrier properties. Each is provided separately. Furthermore, as a method for killing this bag, first make only an inner bag with low gas barrier properties, then seal it up and perform gas soda treatment to make a non-stick bag with the inside of the inner bag sealed. A separately made outer bag with gas barrier properties is covered and the opening part of the outer bag is heated so as to further enclose the inner part. This method has the advantage that it is possible to speed up the gas test in producing a sterile bag with barrier properties, and it is also possible to increase its strength. However, this non-g
In the case of * method, the key step is to make the inner and outer bags separately, sterilize the inner bag, then release it into the outer bag and heat seal it, which is complicated in terms of work operation, so it is not preferable. do not have. Furthermore, if the sterile bag is provided with an injection and spout port, the process becomes even more complicated and is actually extremely difficult to implement. The present invention has been made in view of the above points, and will be described in detail below. That is, the present invention
In a sealed bag with a spout, a resin film having gas barrier properties and/or a multilayer film containing a metal IIIV is used as a film for the outer bag.

[Make a sealed bag with a pouring spout using a film with low gas barrier properties. However, the resin film constituting the inner bag Y is heat-sealed all around the circumference of the heat-sealed part, and the inside of the bag, into which the contents enter, is completely sealed. However, the film constituting the outer bag Y, which has gas barrier properties, is partially heat-sealed at the heat-sealed portion. In this case, the inner bag and outer bag have a single seal part i. Using such a bag, it is possible to make a sealed bag with a gas acid spout and a sterile spout. During gas sterilization, the inner bag and outer bag of the gas test solution are not sealed, so there is no need to encounter the outer bag, which has gas barrier properties. It is possible to quickly make a sealed bag 1 with a spout without soda in the same way as to kill a normal sealed bag with a spout with a low barrier property from infiltration into the inside. After the trial,
After the sterilizing gas inside the sealed bag with a pouring spout has sufficiently evaporated, the heat-sealed part of the outer bag, which was open on one side, is heat-sealed to provide a barrier property to the lending body, and the gap between the inner bag and the outer bag is sealed. to be sealed. Therefore, after this heat sealing, the inner bag is cut off from the outside air and the gas permeability to the inner layer of the bag is reduced, resulting in a sealed bag with a spout having sterile gas barrier properties.

Hereinafter, the present invention will be further described in detail with reference to the embodiments shown in the drawings.

Figure 1 is a schematic diagram showing a bag making machine for making sealed bags with a spout. Outer wood film (2), 13 with gas barrier properties forming the V outer bag in the unwinding part (1) of the bag making machine
), and an inner resin film (4), 15) with low gas barrier properties constituting the inner bag assembly.

From there, each film is unwound. The outer resin film (21, the inner resin film (j) has a spout (to) attached to the spout mounting hole (6) and the spout mounting section (7). Resin films (2), (3) and inner resin films (4), (Is)
are overlapped and heat-sealed at the heat-sealed part (8), and then cut at the cut part (9) to make a sealed bag with spout (2).At this time, the outer resin having gas barrier properties is The films are), l) and the inner resin film (4), which has low spatability, are completely overlapped (i)a and details of the heat sealing method are shown in Figure T-12. Second
The figure is a plan view taken along the line xx' in FIG. 1 and viewed from above the heat seal IIIv of the sealed bag with spout.

The outer resin film Cf1 with gas barrier properties and the inner resin film with low gas barrier properties (3: are heat-sealed using a horizontal heat sealer (b) and a vertical heat sealer (2). Seal ring, (b), (
to), (2) is formed. However, the outer til-film C has gas barrier properties! ) is made narrower in the original film than the inner resin film (1), so that the negative side of the outer 1# sushi film (2) is not heat-sealed. That is, the outer resin film 121 is heat-sealed only at the part ' of the hammer by the heat sealer (B), and the inner resin film (1) is heat-sealed at the rust-free part (2) by the heat sealer. In addition, only the inner resin film of the heat-sealed shaft is heat-sealed.

By doing the above, the entire area around the inner bag is sealed by forming a seal part, and one side of the outer bag forms an unrailed part, which becomes an opening for the inner bag and comes into contact with the outside air. It turns out. A sealed bag with a spout made like this! It is shown in FIG.

The figure in FIG. 3 is a sectional view showing a sealed bag with a spout, and has a spout. The outer resin films (4) and (3) are overlapped and heat-rolled at the heat sealing part (2), but the inner resin film (4), which has a low gas barrier property, ) are trailed. Therefore, the outer resin film (2), the inner resin film (4), and the outer resin film (2)
The space between the film (i) and the inner film (i) is open to the outside air. Therefore, at the time of gas killing, the gas body is the outer resin film (2) with high gas barrier properties, (3+Y
The inner resin film (41, (6)
[It can easily penetrate into the inner ring of the sealed bag with spout just by passing through it.

The can in Figure 5) has the same internal causes as in Figure 85 above, but the lower outer resin film (3) also has the inner resin film (4).
1. Heat-sealed with (i) using a heat-sealing device. Therefore, the space between the outer resin film (S) at the bottom and the inner resin film (5) is not open to the outside air, and the space between the outer resin film (21) with high barrier properties and the inner resin film (4) is not open to the outside air. The gas body enters from the arrow - only from between.

In this case, it is preferable that the outer film 3) is of the same size as the inner resin films (4) and (5).

5th I! The sealed bag with a spout shown in Figure 1 (A) has a large opening to the outside air, so gas cannot enter and the gap between the openings is short.However, the sealed bag with a spout shown in Figure 3 (Bl) It has the disadvantage that the run time is longer than that shown in the third internal cause.

However, in the sealed bag with pouring spout shown in No. 5lll (2), the heat seal part of the part P shown in the heat rail bar 1 and 2 m during bag making is 4 pieces. There is little gap between the three Heat Lacey cycles, making it easier to make bags stably.

On the other hand, in the sealed bag with spout shown in No. 3m, the heat-sealing part of the part P shown in Fig. 2 heat-seals four films, whereas the heat-sealing part of the heat-sealing part heats two films. Since it is sealed, the bag has the disadvantage of being large and difficult to make.

In such a sealed bag with a spout, a cap is applied to the spout to seal the bag and the bag is killed.

The single weight is stored in a sealed bag with a spout in a sealed room to kill 1 gas! The bag is filled under pressure to penetrate into the bag, and then discharged under reduced pressure. Killing gases include ethylene oxide, propylene oxide, formaldehyde,
β-propiolactone, methyl bromide, etc. [available]

The inner resin film has low gas barrier properties, so the pressure is low and the time is short.

In addition, the inner resin film with low gas barrier properties may be a thermoplastic resin film;
For example, it is EVA (ethylene-monohinyl copolymer) with a thickness of 100 μm. This film has an oxygen permeation rate of 50
os/Wt. 24 hrs, ATM or more.

As the outer film, a film having high gas barrier properties such as polyamide, polymer-vinyl alcohol copolymer, polyester, etc. can be used.

Furthermore, these materials can be laminated with a thermoplastic resin film, such as a three-layer film of EVA (thickness: 40 μm)/polyamide (thickness: 15 layers)/EVA (thickness: 60 layers). The oxygen permeability of this film is 5
It is less than 0■/go e 2 4 brs, atm.

Furthermore, even higher gas barrier properties can be obtained by interposing a metal layer such as an aluminum layer or an aluminum vapor-deposited layer in the layer structure of the outer film.

In addition, although the outer resin film and the inner resin film are shown in the sealed bag with spout, this outer *ii film does not necessarily have to be one piece, and two or more laminated films having barrier properties may be used. Also, the inner resin film does not necessarily need to be one, and two or more films may be used.

The sealed bag with a mouth made in this way and subjected to gas tIII is
The gas*W agent penetrates into the inside of the bag, forming a membrane layer inside the bag. After thoroughly removing the residual gas inside the packaging,
As shown in 3rd WJ (A)', the sealed bag with spout is heat-sealed with the outer resin film C2:, (8) and the inner 1/# resin film (4), (5) and r heat-sealed. do. Further, as shown in the third inner opening)', the outer resin films (2), (32) and the inner *m films (4), (5) are heat-sealed at the heat-sealed portion.

In this way, the sealed bag with spout shown in Fig.
By performing 1 step, a seal part @ is formed and the space between the outer resin film RO) and the inner resin film (4) is cut off from the outside air, and the space between the outer resin film 31 and the inner resin film (5) is cut off from the outside air. Therefore, in order for oxygen, etc. from the outside air to enter the inner ring of the date sealing bag, it must pass through the outer resin film 1 having gas barrier properties Y, and by forming this heat rail It is possible to make a sealed bag Y with a high papua pouring spout.

Furthermore, this heat seal alla! The area near the heat-sealed seam a, which is no longer needed due to 1. [It is also possible to cut it off.]

According to the present invention, since the sealed bag with spout is made of a film with high gas perciency, it prevents atmospheric oxygen from coming into contact with the contents of the bag, and prevents the aroma and volatility contained in the contents. It can prevent components from leaking out of the bag. Furthermore, since the inside of the sealed bag with spout is sterile, it can be filled with a special sterile filling machine (e.g. DN-AB filling machine manufactured by Dai Nippon Printing) to prevent perishable contents such as milk and cream. It is also possible to grow oranges at room temperature and they are very beneficial.

Further, according to the present invention, the conventional bag making machine for making sealed bags with a pouring spout can be used, and the inner bag is inserted into the outer bag as seen in Japanese Patent Application Laid-open No. 55-151964. There is no need for such a labor-intensive and complicated process, and it is possible to produce a sealed bag 1 with a barrier-free spout that is very economically advantageous.

Example Outer film: Ethylene-vinyl acetate copolymer film 40μ thick / Biaxially oriented polyamide film 15μ thick / Aluminum lI 9μ thick / Ethylene-vinyl acetate copolymer film 60μ thick. In 1), two 50-volume ethylene-vinyl acetate copolymer films were used. This outer film and inner film were made into bags using a sealed bag making machine equipped with a pouring spout. However, in this case, so that the inner film is sealed on all four sides, and the outer film is sealed on three sides, the width of the outer film is made 30% shorter than the width of the inner film.In other words, the size of the bag is 450% x 480%. The width of the inner film is 480%, while the width of the outer film is 450%.
%.

Next, the bag was placed in the above-mentioned sealed bag V400 bag sterilization chamber and sterilized in the following order: a1v lower Kibi), TFF+, and Shiba attached to the inner and outer surfaces.

(pup) Exhaust the air in the killing chamber [,700 demon Hg
Reduce the pressure to (vacuum gauge).

Concentrated mixture of fine ethylene oxide gas/charcoal soap gas
14 kt 50: 70) F f'r n/
(Introduced into - and at a pressure of Q6Klltd, while applying a slight amount of Mw at the same time, sterilization was carried out at a temperature of 55° C. for 5 hours.

& Reducing the pressure in the self-killing chamber to 700% Hg and blowing in air that has passed through a sterile filter (10 minutes until culm strength), then slowly return the chamber 14 times.

b) Return the inside of the sterilization chamber to atmospheric pressure and remove the inner bag.

This sterilized date-sealed bag is then heat-sealed with one side of the outer film being v-rubbed on three sides.

In other words, the outer film and the two inner films are heat-sealed on all sides, and the space between the outer film and the inner film C layer is disconnected from the outside air. In this way, I obtained the desired triple bag.

After that, the sterilized skimmed milk port fluid is filled into 1 volume using this sealed bag vDN-B filling machine (Dainippon Printing-11) v.
01, increase the temperature by 1 hour at 37°C, and check for spoilage of the contents.
saw. When 100 bags were tested, 0 bags were rotten.

[Brief explanation of drawings]

FIG. 111 is a schematic cross-sectional view showing the configuration of a sealed bag with an attached spout of the bag making machine for a sealed bag with a spout according to the present invention. (ri, +3)...Outer *iii film with high gas barrier properties (4), (6)...Inner resin film υ with low gas barrier properties・・・・・・・・・・・・・・・・Pour patent creator
Dai Nippon Printing Co., Ltd. Kinsha Agent Patent Attorney Atsushi Konishi Figure 1 T- Figure 2 Figure 3 Commissioner of the Patent Office Shima 1) Haruki Tono 1, Incident Display Showa! 6th year patent application No. 192104 2, Name of the invention Sealed bag with pouring spout 3, Relationship with the case of the person making the amendment Patent applicant fl Location Bundle 5 Ichigaya Kaga-cho, Shinjuku-ku, Tokyo - "Item 12
Address Name (289) Dai Nippon Printing Co., Ltd. Representative: Shun Kitajima 4, Agent Address: 1-chome, Ichigaya Kagacho, Shinjuku-ku, Tokyo 162
No. 2 March 1, 1960 (shipment date: February 1960)
0EI) 6, Number of inventions increased due to amendment N/A 7,
The "Detailed Description of the Invention" in the specification to be amended and (1) "Figure 3 0" in the first line of page 11 of the specification are amended. (2) The text on page 11, line 1, of the specification should be corrected to read ``Figure 3@ritoaruna''Figure 3 ■''. (3) “Third internal cause, ■, Δ” on page 1j, line 10 of the specification
, and ■'' is corrected to read ``Figure 3 (4), (6), mouth, and ■''. (4) Delete the symbols ■, Δ, and ■ in Figure 3 of the drawing, and newly insert the third internal cause, ■, 0, and 0. Above Figure 3 (A) Figure 3 (C) Figure 3 (B) [Figure 3 (D)

Claims (1)

[Claims] In a sealed bag, the inner bag is made of a resin film and/or metal film with low gas barrier properties, and the inner bag and the outer bag are formed by leaving a part of the periphery and other parts. Both polymerize,
A matching seal part is formed, and on the other hand, in a part of the above-mentioned periphery, the inner bag is extended to the above-mentioned matched seal part to form a seal part only for the inner bag, and the inner bag is sealed, and the outer bag is left unsealed. A sealed bag with a spout, characterized in that the outer bag has an opening Y with respect to the inner bag.