JP3655104B2 - Synthetic plastic bag with zipper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin zipper-equipped bag body suitable for packaging of articles requiring air permeability inside and outside the bag body, and particularly for packaging food products that are cooked by a microwave oven, oven, or boil.
[0002]
[Prior art]
In recent years, various foods have been developed that can be used immediately by heating with a microwave oven, etc., due to advances in food processing technology and packaging technology, or the establishment of cold chain systems and the spread of refrigerator-freezers at home. Is provided. In addition, in order to save time and labor at home, a case in which a prepared dish is stored in a bag in a frozen state and heated for use when necessary is becoming common.
[0003]
Taking a microwave oven as an example, as a well-known example, a boiled egg that is successfully produced by boil heating will result in the egg bursting when applied to a microwave oven. This is due to the difference in heating mechanism. Microwave ovens vibrate water molecules contained in food by high-frequency (ultra-short wave) irradiation, and heat food by frictional heat generated by the vibration of water molecules. Water vapor is generated from the food with this high frequency heating. Therefore, what is sealed in an egg-like shell will eventually rupture due to expansion by water vapor.
[0004]
This also applies to the packaging bag. If the packaging bag is heated as it is, the packaging bag will be ruptured due to the sealing situation considered for maintaining the quality of the food. As a conventional example, a bag with a chuck as disclosed in Japanese Patent Application Laid-Open No. 7-277348 is provided as a bag that can be reheated after opening easily and reliably and is convenient for storing other than the necessary amount. ing.
[0005]
[Problems to be solved by the invention]
In JP-A-7-277348, two upper and lower chucks are provided in parallel in the opening of the bag body, an opening hole communicating with the outside air is opened in the bag film between the two chucks, and the upper chuck is closed during heating. The lower chuck is opened to let the inflation gas in the bag leak to the outside air from the opening hole, and for storage, the lower chuck is quickly closed and sealed before and after heating to maintain the heat sterilization state. It is a thing. However, in Japanese Patent Application Laid-Open No. 7-277348, when heating is performed, a troublesome operation of always closing the upper chuck, opening the lower chuck, and closing the lower chuck before and after the heating is required.
[0006]
An object of the present invention is to provide a synthetic resin-made bag with a zipper that enables heat treatment and subsequent storage by a simple operation procedure when heat treatment is performed as it is by a microwave oven or the like.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention , as described in claim 1, in the bag body in which two pairs of male and female claws chuck made of synthetic resin are provided in parallel in the opening, the two pairs of chucks are one It is integrated with the bag through a wide base piece, and a vent is provided in the wide base piece between the two pairs of chucks. The wide base piece on the opening side is sandwiched between the vents. The wide base piece on the side of the bag housing portion is not bonded or ventilates the vent between the bag and the base piece. It is characterized by having a non-adhesive portion that can be integrated.
[0008]
According to a second aspect of the present invention, the non-adhesive portion is an easy-peeling weakly adhesive portion that is peeled off by the internal pressure of the bag body.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a bag made of a synthetic resin film, and two pairs of synthetic resin male and female nail type releasable chucks 3A and 3B are provided in parallel in the opening 2 thereof. Yes.
[0010]
The one chuck 3 </ b> A is on the opening 2 side of the bag body 1, and the other chuck 3 </ b> B is on the storage section side of the bag body 1. As shown in FIG. 2, these chucks 3A and 3B are composed of a female claw 3a and a male claw 3b to be engaged with each other. As shown in FIG. 3, the two pairs of chucks 3A and 3B are attached to the inner surface of the bag body film 1a in the opening 2 via one wide base 4C. In addition, the shape and arrangement | sequence of the female nail | claw 3a and the male nail | claw 3b are not limited to illustration.
[0011]
As shown in FIGS. 1 to 3 , the wide base 4C is attached continuously to the wide base 4C on the side of the opening 3 of the bag 1 on the side of the chuck 3A across the longitudinal direction of the chuck 3A. The wide base 4C on the side of the other chuck 3B, which is the storage portion side of the bag body 1, is integrated in the portion 50, and is in a non-adhesive open state (not shown) or the chuck 3B is It is integrated by the bonding part 5 and the non-bonding part 6. A slit-like vent 8 is formed between the chucks 3A and 3B of the wide base piece 4C.
[0012]
Therefore, when the wide base piece 4C portion on the other chuck 3B side is in a non-adhesive open state or integrated with the non-adhesive portion 6, it can be connected to the vent hole 8. It allows ventilation. Incidentally, the non-adhesive portion 6 may be used as the Ijipiru of weakly joined portion for peeling the inner pressure of the bag of FIG. 1 to FIG. 3, forming small air passage which is always opened to the site of weakly joined portion of this Thus, the required ventilation may be maintained. Further, the vent hole 8 may be changed to a slit shape to form a round hole or a square hole.
[0013]
Since the present invention has the structure as described above, normally, the two pairs of chucks 3A and 3B are closed and sealed as shown in FIG. 4, but when heated by a microwave oven or the like, FIG. As shown, the chuck 3B on the storage unit side of the bag 1 is kept closed, and only the chuck 3A on the opening 2 side of the bag 1 is opened. Thereby, when the pressure of the water vapor or the like in the bag body 1 is increased by heating , as shown in FIG. 3 , the pressure of the water vapor or the like leaked from the non-adhered portion 6 to the air vent 8 and the air leaked to the air vent 8 is opened. It passes through the chuck 3A on the opening 2 side of the bag body 1 and is released to the outside air from the opening 2 of the bag body 1 to prevent the bag body 1 from bursting.
[0014]
When the non-adhesive portion 6 is an easy -peeling weakly bonded portion, when the pressure of water vapor or the like in the bag body 1 is increased by heating, the pressure is received and the weakly bonded portion is peeled off, thereby allowing ventilation.
[0015]
Although not shown in the drawing, even when the wide base piece 4C portion on the other chuck 3B side in FIG. 3 is in an unbonded open state, the wide base piece 4C portion is partially or longitudinally arranged. It may be a continuous easy-peeling weakly bonded portion. In this case, when the internal pressure of the bag increases, the easy-peeling weakly bonded portion is peeled off, and the wide base piece 4C portion on the other chuck 3B side is brought into a non-bonded open state so that the air from the air vent 8 is vented. Make it smooth.
[0016]
In a structure in which a small ventilation path that is always open is formed in the weakly bonded portion, the two pairs of chucks 3A and 3B are normally closed and sealed. However, in a package that requires ventilation, the bag body 1 by keeping open the opening only 2 side of the chuck 3A of body 1 is to allow breathing through the outside air and communicates via a slit-shaped vent 8 more small vent passage. When heating by a microwave oven or the like, the chuck 3B on the storage portion side of the bag body 1 is kept closed, and only the chuck 3A on the opening portion 2 side of the bag body 1 is opened. Thereby, until the pressure of the water vapor or the like in the bag body 1 rises to a pressure for peeling the weakly bonded portion by heating, the pressure of the water vapor or the like is leaked at a flow rate smaller than that of the small ventilation path. Although it is discharged from the opening 2 of the body 1, when the pressure is increased to peel the weakly bonded portion, the weakly bonded portion is peeled off, and the pressure in the bag 1 is leaked at a large flow rate. Release from 2 to prevent rupture.
[0017]
The structure in which a small air passage that is always open is formed in the weakly bonded portion, the weakly bonded portion remains in the bonded state until the pressure of water vapor or the like in the bag body 1 rises to the pressure for peeling the weakly bonded portion. Since it is maintained, it has a steaming effect on the package, and it is possible to prevent moisture of the package from being released to a change in taste of the food or becoming hard due to drying.
[0018]
In any of the above structures, the heating process can be performed by a simple operation of opening only one of the chucks 3A on the opening 2 side of the bag body 1 during heating. When the remaining contents are stored, it can be sealed by simply closing the upper chuck 3A.
[0019]
In the above embodiment, the bag body 1 having the opening 2 in the upper portion is described. However, the present invention is also applied to a horizontally placed bag body having an opening with a chuck in the body of the bag body 1. However, the present invention is not limited to the bag 1 having the opening 2 at the top.
[0020]
In addition, by setting the length and width of the bonded portion 5 and the non-bonded portion 6 or the weakly bonded portion, and the size of the small ventilation path under optimum conditions according to the package, an appropriate steam for cooking by heating is set. Release and steaming are obtained, and rupture of the bag 1 is prevented. In addition, the form of the adhesion part 5 and the non-adhesion part 6 or the weak adhesion part is not limited to the content shown in this specification and drawing, and trying to change the design as appropriate belongs to the category of the present invention. The same applies not only to changing the length, width, interval, and positional relationship, but also to the case where the bonding portion 5 is a spot-shaped bonding portion. Further, the weakly bonded portion is defined as an bonded portion that is peeled and opened before the bonded portion is damaged by the internal pressure.
[0021]
【The invention's effect】
As described above, according to the present invention, only one of the two chucks parallel to each other at the time of heating is opened on the bag body opening side, and only one of the opened chucks is closed for storage after heating. Therefore, heat treatment and subsequent storage can be performed with a simple operation procedure. In addition, since the chuck on the bag body opening side is opened and closed, there is an advantage that it can be easily and reliably opened and closed as compared with the conventional one that opens and closes the chuck on the bag body storage side.
[Brief description of the drawings]
Front view of the bag of the present invention; FIG 2 shows Figure 1A-A line cross-sectional view a main part perspective view of the present invention; FIG 4 shows sectional view taken along line B-B of FIG. 3 and FIG. 5 3 is a cross-sectional view taken along the line CC of FIG . 3. FIG . 6 is a cross-sectional view of the opening of the bag body having the structure shown in FIG .
1 Bag 2 Opening 3 Chuck 4c Wide base piece (or tape-like piece)
5 Bonding part 6 Non-bonding part 8 Vent 50 Continuous bonding part

Claims (2)

In the bag body in which two pairs of male and female claws made of synthetic resin are provided in parallel in the opening, the two pairs of chucks are integrated with the bag body through one wide base piece. A wide base piece between the pair of chucks is provided with a vent, and the wide base piece portion on the opening side is integrated in a continuous manner over the bag body and its longitudinal direction. The wide base piece portion on the body storage portion side is integrated with a non-adhesive portion or a non-adhesive portion that enables ventilation to the vent hole between the bag body and the base piece portion. A bag with a synthetic resin zipper. The bag body with a zipper made of synthetic resin according to claim 1, wherein the non-adhesive portion is an easy-peeling weakly bonded portion that peels off by an internal pressure of the bag body.

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