JPH076136Y2 - Packaging bag - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a packaging bag capable of displacing an internal gas, and more specifically, a packaging bag is provided with foods such as natto, rice cakes, rice crackers, and cookies. Stores confectionery, coffee, tea and other favorite foods, rice, wheat, soybeans, adzuki beans, peanuts and other grains, almonds and other nuts, dried shiitake mushrooms, seaweed, dried fish and other marine products, and preserves such substances. Regarding things used for etc.

[Conventional technology]

2. Description of the Related Art Conventionally, inert gas replacement packaging has been used for storage of foods and the like, which deteriorate due to lack of oxygen. As the replacement method, the flash method has been used in which the gas outflow nozzle is simply inserted into the opening of the packaging bag because the workability is good and the gas replacement device is inexpensive. However, this method has a drawback that the gas replacement efficiency is poor because the replacement gas does not easily reach the bottom of the bag.

There is also an improved flush method that uses a long gas outflow nozzle and inserts it into the bottom of the packaging bag to replace the gas.
In this case, although a high substitution rate can be obtained, the workability is poor, and it is not possible to insert the nozzle to the bottom due to the articles that are placed in the packaging bag.For example, when applying it to cookies, dried shiitake mushrooms, etc. It had a defect such as the destruction of the article.

Further, a breathing type in which deaeration and gas filling are repeated, or a chamber type in which vacuum and gas filling are performed in a sealed container is also performed. However, in these methods, although a high substitution rate can be obtained, workability is poor and expensive equipment is required. Furthermore, when applied to dry shiitake mushrooms, they should be degassed or vacuumed. It had the drawbacks of being broken by the use of the product, having a hole in the packaging bag when applied to something with a hard protrusion such as a burr, and requiring a large amount of gas for the breathing type. .

[Problems to be solved by the invention]

As described above, the conventional gas replacement method using a simple packaging bag has various drawbacks. The object of the present invention is to use a cheap gas type gas replacement device with good workability, which does not require degassing or vacuuming, without using a long nozzle for gas replacement, and a high replacement rate can be obtained. To provide a packaging bag.

[Means for solving problems]

That is, the present invention relates to a packaging bag made of a substantially air-impermeable material that can be heat-sheeted, and divides the opening of the packaging bag into two parts, and divides the opening from the opening along the edge connecting the opening and the bottom. Providing a close contact part extending in the bottom direction, forming a gas introduction path between the edge part and the close contact part, dividing the packaging bag into a gas introduction path and an article storage part, and gas at least near the bottom part. (EN) Provided is a packaging bag in which an introduction path and an article storage section are communicated with each other so that the gas introduced from the gas introduction path can replace the gas in the packaging bag.

Further, as an aspect of the present invention, the close contact portion is intermittent from the one end on the bottom side of the close contact portion forming the gas introduction path along the bottom of the packaging bag toward the edge portion facing the edge portion forming the gas introduction path. It is also preferable that the gas introducing passage is formed between the bottom portion and the intermittent contact portion and the gas introducing passage is extended.

In the present invention, a packaging bag made of a heat-sealable substantially non-permeable material is used as the packaging bag.

The heat-sealable substantially non-permeable material may be a sheet-sealable material having an oxygen permeability of 200 ml / m ² atm ・ day or less, preferably 20 ml / m ²・ atm ・ day or less, The thickness is not particularly limited. Specific examples of such packaging materials include PET (polyethylene terephthalate) / PE (polyethylene) and PET / unstretched PP.
(Polypropylene), unstretched NY (nylon) / PE, unstretched NY / unstretched PP, stretched NY / PE, stretched NY / unstretched PP, PVDC
(Polyvinylidene chloride) coated stretched NY / PE, PVDC coated stretched NY / unstretched PP, PVDC coated stretched PP / PE, PVDC coated stretched PP /, unstretched PP, PET / Al (aluminum) foil / PE, stretched
NY / Al foil / PE, Boblon (trade name, Nippon Synthetic Chemical Co., Ltd.)
Made) / PE, Boblon / unstretched PP, EVAL (trade name,
Kuraray Co., Ltd./PE, EVAL / unstretched PP, etc. are used.

In addition, the shape of the packaging bag is not particularly limited, and a two-sided seal bag, a three-sided seal bag, a backing seal bag, a tube bag, a gusset bag, and the like are preferably used.

The packaging bag of the present invention divides the opening of the packaging bag into two parts, and is provided with a close contact portion extending from the opening toward the bottom along the edge connecting the opening and the bottom. The contact portion extends from the open end of the packaging bag toward the bottom of the packaging bag and is provided along the edge of the packaging bag (the side that does not form the open end or the bottom). A gas introduction path is formed between the edge portion and the close contact portion by the close contact portion, and the packaging bag is divided into the gas introduction path and the article storage portion.

Moreover, in the packaging bag of the present invention, at least in the vicinity of the bottom, by suspending or stopping the close contact portion extending from the opening, the gas introducing passage and the article storing portion are communicated with each other, and the gas introduced from the gas introducing passage is used. It is designed so that the gas in the packaging bag can be replaced.

As a method for closely adhering a part of the packaging bag to form the gas introduction path, there are a heat sheet method, a method using a hot melt agent, a method using a double-sided adhesive tape, and the like, and a heat sealing method is preferably used. In addition, it may be possible to press with a jig from both sides of the packaging bag. In this case,
By releasing the jig after gas replacement, the gas introduction path disappears and the gas introduction path does not remain in the packaging bag.
It has an advantage of not impairing the appearance of the packaging bag.

The width of the gas introduction path formed is preferably 10 mm or more and 100 mm or less in consideration of workability, and the length of the gas introduction path is from the opening to the bottom of the packaging bag in order to increase the gas replacement rate. The length is 50% or more, preferably 80% or more.

In this way, by configuring the packaging bag, it is possible to introduce an inert gas or the like from the gas introduction path by a nozzle or the like and cause the inert gas or the like to flow into the article storage unit that stores the articles. The gas can be replaced.

The packaging bag of the present invention is hermetically sealed by, for example, heat-sealing the bisected open end of the packaging bag after replacing the gas in the packaging bag containing the storage article.

In the present invention, by inserting the gas outflow nozzle of the flash type gas displacement machine into the gas introduction path of the opening of the packaging bag and performing gas replacement, the replacement gas is guided to the bottom of the packaging bag through the gas introduction path, and the article storage section is opened. Since it passes through and is discharged to the outside of the packaging bag, it is possible to replace gas with a high replacement rate.

Further, in order to absorb oxygen remaining after gas replacement, it is also effective to load an oxygen absorber into the packaging bag at the time of hermetic packaging.

In the present invention, when an oxygen scavenger is used, the oxygen scavenger composition contained in the sachet of the oxygen scavenger includes sulfite, bisulfite, dithionite, hydroquinone,
Catechol, resorcin, pyrogallol, gallic acid, rongalit, ascorbic acid and / or its salt, isoascobic acid and / or its salt, sorbose, glucose, lignin, dibutylhydroxytoluene or butylhydroxyanisole, etc. A composition containing a ferrous salt such as iron, a composition containing metal powder such as iron powder, or a composition containing fats and oils that are susceptible to oxidation is used. An agent composition or a carbon dioxide absorption type oxygen absorber composition may also be used.

〔Example〕

 The present invention will be described in detail with reference to embodiments and drawings.

See Example 1, FIG. 1 and FIG. 2 Heat-seal into a three-way seal bag (opening 450 mm) of 450 mm in width and 640 mm in length, which is made of polyvinylidene chloride coated stretched nylon / polyethylene bag. From the opening 11 to the bottom along the edge 13 connecting the opening 11 and the bottom 12 of the bag
A gas introducing passage 3 having a width of 20 mm and a length of 600 mm extending in 12 directions was provided. (Refer to FIG. 1) Parts storage part 1 of this packaging bag (a part other than the gas introduction path 3)
After putting 1.5 kg of dried shiitake mushroom 5 '(donko) into the container, insert the gas outflow nozzle 4 into the opening of the gas introduction passage with a flash type gas displacement machine, and after introducing 40 l of nitrogen gas for 20 seconds,
The opening 11 including the opening of the gas introduction part was sealed and hermetically packaged. (See FIG. 2) The oxygen concentration in the sealed packaging bag was measured and the substitution rate was calculated. The results are shown in Table 1.

Example 2 and FIG. 3 The heat-sealing portion 10 of the packaging bag of Example 1 is arranged from the one end on the packaging bag bottom 12 side to the edge portion 14 in parallel with the bottom portion 50.
The seal part was extended intermittently at intervals of mm. The same operation as in Example 1 was performed except that a packaging bag in which the gas introduction passage 3 was extended along the bottom 12 was used.

The results are shown in Table 1.

Comparative Example 1 The same operation as in Example 1 was performed except that the gas introduction passage was not formed. (The packaging bag of FIG. 4 was used.) The results are shown in Table 1 together with Examples 1 and 2.

(Operation and effect) In the present invention, by constructing the packaging bag as described above, an inert gas or the like is introduced from the gas introduction path of the opening of the packaging bag by inserting the gas outflow nozzle or the like of the flash type gas displacement machine. The introduced gas is guided to the bottom of the packaging bag through the gas introduction path, passes through the article storage section in which the articles are stored, and is discharged to the outside of the packaging bag, so that gas replacement with a high substitution rate is possible.

According to the packaging bag of the present invention, it is possible to perform gas replacement at a high replacement rate with an inexpensive gas replacement packaging device with good workability.

[Brief description of drawings]

FIG. 1 is a schematic view showing one embodiment of a packaging bag according to the present invention. FIG. 2 or FIG. 3 shows an example using the packaging bag according to the present invention. In FIG. 3, the gas introduction passage is extended to the vicinity of the bottom 12 of the packaging bag, and the heat seal portion 10 is arranged from the edge 13 side to the edge 14 side.
The gas introduction path 3 is formed along the bottom portion 12 by intermittently extending in the direction. FIG. 4 shows a conventional packaging bag. In the figure, 1 is an article storage part, 2 is a heat-sealing part of a packaging bag, 3 is a gas introduction passage, 4 is a gas outflow nozzle, 5 is an object to be preserved, and 10 is a heat seal applied to form a gas introduction passage. , 11 is an opening, 12 is a bottom, and 13 and 14 are edges.

Claims (2)

[Scope of utility model registration request] 1. A packaging bag made of a heat-sealable substantially non-breathable material, which divides the opening of the packaging bag into two parts and extends along the edge connecting the opening and the bottom from the opening to the bottom. A contact portion extending in the direction is provided, and a gas introduction path is formed between the edge portion and the contact portion, and the packaging bag is divided into a gas introduction path and an article storage portion, and gas introduction is performed at least near the bottom. To connect the road and the goods storage,
A packaging bag in which the gas in the packaging bag can be replaced by the gas introduced from the gas introduction path. 2. An intermittent contact portion is provided from one end on the bottom side of the contact portion forming the gas introduction passage along the bottom of the packaging bag in the direction of the edge facing the edge portion forming the gas introduction passage, and the bottom portion is provided. The packaging bag according to claim 1, wherein a gas introduction passage is formed between the intermittent contact portion and the gas inlet passage.