JP2879697B2 - Long-term storage of disposable warmers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to a method for heating a body by heating an exothermic substance which causes a reaction that generates heat in the presence of oxygen in a bag having air permeability. The present invention relates to a long-term preservation method for flat disposable body warmers used to relieve stiff shoulders, back pain, joint pain and muscle pain.

<Conventional technology> The main exothermic substances in disposable warmers are iron powder, water, salt as a catalyst, activated carbon, and water retention materials.The prevention of oxidation of iron powder by oxygen due to intrusion of air and the evaporation of moisture 1 in a breathable bag to prevent
The disposable body warmer for each individual is made of a plastic film such as polypropylene, polyester, polyethylene, nylon, etc., coated with a plastic such as vinylidene chloride, vinyl chloride copolymer, etc., which is impervious to oxygen and moisture (KOP sheet). It is sealed in a sealed outer bag and packaged, and when used, the outer bag is broken and taken out.

<Problems to be Solved by the Invention> However, although the outer bag has a sufficient effect of preventing oxygen, that is, air from entering, the degree of prevention of permeation of moisture is lower than that of oxygen.
For this reason, about 10 to 15
The water contained in the water evaporates out of the outer bag during long-term storage (more than 3 years), shortening the duration of use and reducing the commercial value.

<Means for Solving the Problems> In view of the above, the present invention has been made to effectively prevent the evaporation of water, thereby preventing the use duration from decreasing even when stored for more than three years. It is characterized in that a plurality of disposable body warmers are stacked, put in a storage bag made of a material impermeable to moisture, such as a metal foil having small holes or a metal-coated plastic sheet, and repackaged.

<Embodiment> In the drawings, reference numeral 1 denotes a flat disposable body warmer in which a heating substance is contained in a breathable bag, and numeral 2 denotes an outer bag made of the above-mentioned KOP sheet for packing the above body warmer one by one.

According to the present invention, a plurality of, for example, ten, disposable warmers in an outer bag are stacked, put in a state of being stacked in a storage bag 3 made of a sheet made of a material impermeable to moisture, sealed, and repackaged.

The sheet for forming the storage bag 3 is made of metal foil such as aluminum foil, or plastic film such as polypropylene, polyester, polyethylene, nylon, etc., made of aluminum, copper, or the like.
A metal vapor-deposited sheet in which metal fine powder such as chrome is layered by a vacuum vapor deposition method, or a metal printed sheet in which a metal fine powder is mixed with a printing ink and the plastic film is layered with the metal fine powder by a printing method, to remove moisture. It shall not be transmitted. still,
To seal by heat sealing, a heat sealing film such as a polyethylene film is laminated on the inner surface of the sheet.

Then, the main body of the disposable body warmer generates hydrogen, and this hydrogen exits from the outer bag 2, so that the storage bag 3 is provided with a small hole 4 for allowing the hydrogen to escape to the outside. The area of the small hole 5 is the storage bag 4
Within 5% of the total surface area.

In this way, when a plurality of disposable body warmers containing an outer bag are put into the storage bag 4 in a stacked manner, the lower surface of the outer bag of the upper body warmer and the upper surface of the outer bag of the lower body warmer closely adhere over most of the area. In addition, the upper surface and the lower surface of the storage bag that does not transmit moisture are in close contact with the upper surface of the outer bag of the uppermost body and the lower surface of the outer bag of the lower body. Therefore, since the area of each outer bag where water evaporates to the outside becomes extremely small, the water evaporation of each disposable body warmer contained in the outer bag can be largely prevented. At the same time, the cairo main body is generated, and the hydrogen coming out of the outer bag escapes from the small hole 5 of the storage bag, so that the storage bag does not inflate with hydrogen during the long-term storage and does not burst.

Make a storage bag with aluminum evaporated sheet, and add Cairo to this
The storage method according to the present invention (A) in which sheets are stacked, sealed, and repackaged, and a storage bag made of polyethylene film, ten sheets of Cairo are stacked, sealed, and repackaged (B) As a result of the comparison test, the following differences occurred in the duration of use.

1 year 2 years 3 years A 24 hours 23.5 hours 23 hours B 24 hours 22 hours 20 hours In other words, the duration of B is 2 hours after 2 years and 4 hours after 3 years
Although shortened over the years, according to the invention, the reduction in duration was only 30 minutes after 2 years and only 1 hour after 3 years.

<Effects of the Invention> According to the present invention, while the hydrogen generated by the disposable body warmer escapes, the evaporation of water is effectively prevented, thereby minimizing the shortening of the use duration and storing the disposable body warmer for a long time. can do.

[Brief description of the drawings]

The drawing is a cross-sectional view showing a state in which a warmer is stored according to the present invention. In the figure, 1 is a disposable body warmer, 2 is its outer bag, 3 is a storage bag, and 4 is a small hole.

Claims (1)

(57) [Claims] 1. A plurality of disposable body warmers in an outer bag are stacked,
A long-term storage method for a disposable body warmer, which is repackaged in a storage bag made of a material impervious to moisture, such as a metal foil having small holes or a plastic sheet coated with metal.