JPH0617723Y2 - Reclosable packaging bag for retort food - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a resealable packaging bag for retort food, which is capable of being resealed.

[Conventional technology]

A commonly used reclosable packaging bag is provided with a zipper part for opening and closing the opening on the inner surface of the opening end side of the packaging bag body with both sides heat-sealed, and an opening is provided at a part on the end side of the zipper part. It is configured by providing a heat seal portion for closing the portion, and for opening, the zipper portion and the heat seal portion are cut with a cutting tool or manually broken.

On the other hand, the reclosable packaging bag for retort foods is required to have oxygen barrier property and heat resistance, and a laminated film composed of an aluminum foil and an unstretched polypropylene film or a laminated film composed of a stretched nylon film and an unstretched polypropylene film is required. It is used as a material. Since this type of laminated film is strong in strength, it requires considerable force to be cut by hand.

[Problems to be solved by the device]

Since the laminated film of the resealable packaging bag for retort food is hard to tear, the cutting between the zipper part and the heat seal part should be done using a cutting tool such as a knife or scissors. You need it, and if you don't have a knife or scissors at hand, you have to get it.

Therefore, a tape of stretched film is attached between the zipper part and the heat seal part of the retortable packaging bag for retort food and the cutting direction of the stretched film is used to handle the gap between the zipper part and the heat seal part. However, in this case, the tape attachment process is time-consuming and costly, and when cutting along the tape, the cutting line comes off the tape and the zipper part May be damaged.

The present invention has been made in view of the above points, and can be easily opened without using a cutting tool, and the zipper portion is not damaged at the time of opening, and the opening width is set to a width as necessary. An object of the present invention is to provide a reclosable packaging bag for retort food.

[Means for Solving the Problems]

The reclosable packaging bag for retort food of the present invention is provided with a zipper portion for opening and closing the opening on the inner surface of the opening end side of the packaging bag body whose both sides are heat-sealed, and the portion on the end side of the zipper portion. In the retortable packaging bag for retort food provided with a heat seal portion for closing the opening, a notch is provided in each of the parts between the zipper portion and the heat seal portion of the side heat seal portion of the packaging bag body, While providing a narrow opening rough surface forming part that connects these notches with a straight line to the laminate film located on both sides of the packaging bag body, part of the zipper part is heat-sealed to make it wider than the opening width of the packaging bag body. It is configured to form an opening having a narrow width.

[Action]

In the reclosable packaging bag for retort food of the present invention, a narrow opening rough surface is formed so as to connect the notches provided between the zipper portion and the heat sealing portion of the side heat sealing portion of the packaging bag body. Since there is a part, if you break the packaging bag body from one notch, the cutting line will reach the other notch along the rough surface forming part for opening, without damaging the zipper part, and this cutting is done by hand It does not require a separate cutting tool, and the opening width of the zipper part is narrower than the opening width of the packaging bag body, so when the retort process is performed, the zipper part is deformed and fits. It does not become defective.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example in which the re-closeable packaging bag for retort food according to the present invention is applied to a self-supporting packaging bag, and the main body 1 of the re-closed packaging bag for retort food comprises two rectangular laminates forming side surfaces. The laminated film piece 3 is composed of the film pieces 2 and 2 and the laminated film piece 3 forming the bottom part, and the laminated film piece 3 forming the bottom part is folded in two and the side surface is formed so that the bent part 3a is inserted. , 2
The laminated film pieces 2 and 2 are heat-sealed to form side heat-sealed portions 4 and 4, and the laminated film piece 2 and the laminated film piece 3 are heat-sealed to form a bottom portion. The upper opening 6 is formed and filled with contents, and then heat sealed to form a heat seal portion 7.

A zipper portion 8 is formed on the upper end portion of the rectangular laminated film piece 2 so as to extend between the side heat seal portions 4 and 4, and a narrow opening rough surface forming portion 9 is formed at a position on the end side thereof. ing. The zipper portion 8 is made up of an engaging rib piece 10 attached to one rectangular laminated film piece 2 and an engaging groove piece 11 attached to the other rectangular laminated film piece 2. Protrusion strip 10a of the mating rib piece 10
Is engaged with the engagement groove 11a of the engagement groove piece 11 to close the opening, and the projection 10a is disengaged from the engagement groove 11a to open the opening, whereby a resealable seal is formed. I try to act as a department.

On the other hand, as shown in FIG. 2, the rectangular laminated film piece 2 is a polyester film 1 having a thickness of 12 μm.
2, DL layer 13, aluminum foil 1 with a thickness of 9 microns
4, an adhesive resin layer 15 and a cast polypropylene film 16 having a thickness of 60 microns are joined together, and the zipper portion 8 and a narrow opening rough surface are formed on the inner surface of the cast polypropylene film 16 located on the inner surface side. The forming portion 9 is formed. The opening rough surface forming portion 9 is formed by scratching the cast polypropylene film 16 with a grinding roller (not shown).

On the other hand, an additional heat seal portion 17 is provided on the side heat seal portions 4 and 4 of the retortable packaging bag body 1 for retort food,
17 are integrally connected. The heat-sealing edge portion 18 of the additional heat-sealing portion 17 extends to the heat-sealing portion 7 so as to leave the opening length L of the zipper portion 8 obliquely above the portions 19 and 19 below the zipper portion 8.
The additional heat seal portion 17 is formed on both sides in the embodiment shown in FIG. 1, but may be provided on one side as long as the same opening length L is formed.

Further, a notch 20 is formed in a portion between the zipper portion 8 and the heat seal portion 7 of the side heat seal portion 4 of the resealable food reclosable packaging bag body 1 so as to be continuous with the opening rough surface forming portion 9. 20 are provided.

Then, in order to open the reclosable packaging bag for retort food filled with the contents, hold both sides of the notch 15 provided in the one side heat seal portion 4 by hand, and apply a force in a direction away from each other. Then, the notch 15 breaks, and the cutting line extends from the notch 15 to the opening rough surface forming portion 9, extends along the opening rough surface forming portion 9, and then to the other side heat seal portion 4. The notch 15 is provided so that the notch 15 is opened and the filled contents can be taken out. In this case, since the cutting line does not shift from this portion along the opening rough surface forming portion 9, the cutting line does not extend to the zipper portion 8 and damage the zipper portion 8.

When the contents to be taken out remain, the contents are sealed by closing the zipper part 8. The opening length L of the zipper part 8 is set to a predetermined dimension by the additional heat seal part 17. The zipper section 8 can be enclosed with a single touch since it is installed.
By narrowing the opening length L of the above, even if the zipper portion 8 is deformed due to thermal contraction during the retort treatment, the fitting portion is not affected thereby.

In the above example, the opening rough surface forming portion 9 was provided on the cast polypropylene film 14 located on the inner surface side of the bag, but this was provided on the polyester film 10 located on the front surface side.
Of course, it may be provided in.

[Effect of device]

As described above, according to the present invention, notches are provided in the side heat-sealing portion of the packaging bag body between the zipper portion and the heat-sealing portion, and these notches are connected by straight lines on both sides of the packaging bag body. Since the opening rough surface forming part with a narrow width is provided, the opening can be performed manually without using a cutting tool, and the cutting line at the time of opening extends along the opening rough surface forming part and deviates from here. Since there is no, there is no damage to the zipper portion arranged adjacent to the opening rough surface forming portion, and since the opening length of the zipper portion is set to a predetermined narrow dimension by the additional heat seal portion, The zipper can be enclosed with one touch, and the opening length of the zipper can be narrowed, so even if the zipper is deformed due to heat shrinkage during retort processing, this will affect the fitting part. Occur It is an effect that is small.

[Brief description of drawings]

FIG. 1 is a view showing a state before filling the contents of a reclosable packaging bag for retort food according to the present invention, and FIG. 2 is a sectional view of a laminate film constituting the reclosable packaging bag for retort food. . DESCRIPTION OF SYMBOLS 1 ... Recloseable packaging bag body for retort foods, 2 ... Rectangular laminated film piece, 4 ... Side heat seal part, 8 ... Zipper part, 9 ... Rough surface forming part for opening, 10 ... Engaging rib piece,
10a ... ridge, 11 ... engagement groove piece, 11a ... engagement groove, 17
… Additional heat seals, 20… notches.

Claims (1)

[Scope of utility model registration request] 1. A zipper part for opening and closing the opening is provided on the inner surface of the opening end side of a packaging bag body whose both sides are heat-sealed, and a heat seal for closing the opening at the end side of the zipper part. In a resealable packaging bag for retort foods provided with a portion, notches are provided in the portions between the zipper portion and the heat sealing portion of the side heat seal portion of the packaging bag body, respectively, and they are located on both sides of the packaging bag body. The laminating film is provided with a narrow opening rough surface forming portion that connects these notches with a straight line, and part of the zipper portion is heat-sealed to form an opening portion having a width narrower than the opening width of the packaging bag body. A resealable packaging bag characterized by.