JPH1017012A - Container bag that ensures vent when necessary - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag that can ensure vent when necessary, is formed in one piece by a bag-making process and can be mass-produced at low cost. SOLUTION: A heat-seal part 14 on an end of a bag is heat-sealed with a plastic non-woven fabric 2 inserted, and non-heat-sealed parts than reach the inside of the bag are provided with in the heat-sealed part to form vent openings 3 with unmelted non-woven fabric 20 left. Outer ends 30 of the vent openings 3 are closed by a seal part 15 that is formed by heat seal. A score 40 is made between the heat seal parts 14 and 15 and along a line that passes by the outer ends 30 of the two or more vent openings 3 that are arranged with their upper and lower ends trued up. A tear-off device having guide cuts 41 on the upper and lower ends of the bag is provided. In addition, the score 40 is not made on the outer ends 30 of the vent openings 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage bag in which ventilation is blocked in a normal state such as storage, and ventilation can be ensured when necessary.

[0002]

2. Description of the Related Art A ventilation bag is used as a bag for storing cooked items in a microwave oven or the like in order to release gas generated in the bag during heating. Therefore, it is necessary to shut off the ventilation, so they are housed in separate bags and double-packed. Alternatively, a storage bag may be provided with a vent valve or the like that operates to release gas by the internal pressure of the bag during cooking. However, in each case, a separate process is required after the completion of the bag-making process of the storage bag, which is not cost-effective and hinders mass production.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a storage bag which can secure ventilation when necessary, can be integrally formed in the bag making process, can be mass-produced at low cost, and can prevent invasion of various bacteria when securing ventilation. It is to be.

[0004]

For this reason, in the storage bag of the present invention, a plastic film is heat-sealed to form a bag, and a part of the heat-sealing portion with a plastic non-woven fabric interposed therebetween is heat-sealed. The non-welded remaining portion of the nonwoven fabric is formed in the air hole of the non-welded portion formed by not having the inner end facing the bag, and the outer end of the air hole is not conducted to the outside air. In addition to the arrangement, an opening means for communicating the outer end of the ventilation hole with the outside air is provided.

[0005] A non-welded non-welded part of the nonwoven fabric is interposed in the air hole of the non-welded part formed by not performing heat sealing on a part of the heat seal part of the bag, and the inner end thereof is inserted into the bag. In addition, the outside end is closed so as not to conduct with the outside air, or the outside end is opened in another closed chamber. The air permeability is cut off, and in the use state, the opening means communicates with the outside air by the opening means, so that the air inside and outside the bag is ensured.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to illustrated embodiments. The embodiment shown in FIGS. 1 and 2 is a bag S for storing food for a microwave oven, in which the edges of polypropylene films 11 and 12 are heat-sealed to form bags. Heat-sealed part 13 by seal,
14 are protruding.

A characteristic configuration is that the heat-sealed portion 14 at one end is heat-sealed with the nonwoven fabric 2 of polypropylene interposed therebetween, and a non-heat-sealed portion that reaches the inside of the bag and is not heat-sealed is provided in a part thereof. It is. That is, the non-woven fabric 2 is melted by the heat sealing with the non-woven fabric 2 interposed therebetween, and is melted and integrally welded to the non-woven fabrics 11, 12.
The non-welded portion not subjected to heat sealing becomes a hole state and becomes a vent hole portion 3 without dissolving the nonwoven fabric 2 therebetween.
As shown in FIG. 2, the non-welded non-woven fabric 20 remains between the films 11 and 12.

The inner end of the vent hole 3 is open toward the inside of the bag, while the outer end 30 is further closed by a heat-fitting portion 15 formed on the outer portion by heat sealing. The width of the air hole 3 is about 2 mm, and the air hole 3 is bent in the middle to form a Z-shape. By forming the grooves so that they are not pressed against each other, a non-welded portion that avoids heat sealing can be obtained.

Then, a series of cuts 40 are formed in a line passing through the outer end 30 of each of the ventilation holes 3 arranged in plural at the top and bottom.
Is applied to the heat-bonding portions 14 and 15, and a break opening means is provided in which the guide notches 41 are not provided at the upper and lower ends of the bag. Note that the cuts 40 are not provided on the outer end 30 of the ventilation hole 3.

With such a bag, the ventilation hole 3 is buried in the heat-fitting portion 14, so that the ventilation with the outside air is blocked, and the stored food is sealed and kept in an appropriate storage state. It becomes. Then, when cooking in a microwave oven, the heat-deposited portion is broken along the cut 40 from the guide cut 41. As a result, as shown in FIG. 3, the outer end 30 of the ventilation hole 3 is opened and opened, and the outside air and the inside of the bag are ventilated through the ventilation hole 3. Good.

Therefore, when gas is generated in the bag and the pressure in the bag is increased, the nonwoven fabric 2 slightly protruding into the bag is discharged to the outside air through the vent hole 3. At this time, even if there is no non-woven fabric 2 slightly protruding in the bag, the nonwoven fabric 2 is released from the vent 3 facing the inside of the bag.
Is released through the continuous pores of the non-welded non-woven fabric 20, but if the internal pressure of the bag increases rapidly, the vent 3 may be opened and gas may directly escape as shown in FIG.

As described above, according to this embodiment, the ventilation can be normally shut off, the storage and storage can be performed well, and the gas can be vented at the time of cooking. It can be easily formed. In addition, when the state where the vent 3 is opened is left,
Even if germs try to invade from the air hole 3, the non-fused nonwoven fabric 20 is engaged with the germs and prevents further advance, so that it is possible to prevent invasion into the bag.

The present invention is not limited to this embodiment. For example, the shape and the number of the ventilation holes are not limited, and may be a complicated shape or a straight line as shown in FIG. However, a bent shape is desirable for preventing invasion of various bacteria.

Further, the opening means for conducting the outer end of the vent hole to the outside air is appropriate. For example, when the outer end of the vent hole is heat-sealed as in this embodiment, the heat seal portion is broken. Is simple, but only the portion where the ventilation hole is arranged as shown in FIG. 5 may be broken. FIG.
As described above, a configuration may be adopted in which a cut tape 5 for guiding breakage is provided in the film and the tape tip 51 projects. Further, as shown in FIG. 6, when the outer end 30 of the ventilation hole 3 is arranged so as to be opened in another closed chamber 6, the closed chamber 6 is opened by breaking or the like, so that the outer end of the ventilation hole 3 is opened. 30 communicates with the outside air. Further, a film having a cutting direction that can be easily cut straight and may be used.

The plastic film of the bag may be of any material and composition, and may be a composite film. Also,
In addition to bags for heating and cooking, it can be effectively used as bags for insect repellents, bags for fermentation, etc., which can be ventilated during use.

[0016]

According to the first aspect of the present invention, normally, the ventilation can be blocked and the bag can be well stored and stored, and the bag can be vented and vented by the opening means when necessary. The bag can be easily formed at the time of the bag, and in the air-permeable state when necessary, the nonwoven fabric at the air hole portion can attract bacteria and prevent invasion into the bag, thereby ensuring a sanitary condition.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing one embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part thereof.

FIG. 3 is a partially cutaway plan view showing a state in which the ventilation hole is opened.

FIG. 4 is a plan view of a main part of another example, which is partially cut away.

FIG. 5 is a partially cutaway plan view showing another example of an open state.

FIG. 6 is a partially cutaway plan view showing another example of a structure for blocking the outside air from the outer end of the ventilation hole portion from the outside air.

[Explanation of symbols]

 11, 12 Film 13, 14, 15 Heat-bonded part 2 Non-woven fabric 20 Non-welded non-woven fabric 3 Vent hole 30 Outer end of vent hole 40 Cut

Claims (1)

[Claims] 1. A non-welded portion formed by heat-sealing a plastic film to form a bag body and not heat-sealing a part of the heat-sealed portion with a plastic non-woven fabric (2) interposed therebetween. A non-welded remaining portion of the nonwoven fabric is formed in the ventilation hole portion (3), and the inner end thereof faces the bag,
The outer end (30) of the air hole is arranged so as not to communicate with the outside air, and an opening means for connecting the outer end (30) of the air hole to the outside air is provided. Containment bag.