JPH05293329A - Dehumidifying packing bag - Google Patents

Abstract

PURPOSE:To obtain a dehumidifying packing bag having a structure easy to produce by dividing a synthetic-resin film bag into the upper and lower compartments at a lateral perforated sealing part and forming a gas-permeable microporous membrane sheet impermeable to water at atmospheric pressure on the side face of the upper compartment. CONSTITUTION:A bag is made from a synthetic-resin film, the lower sides are bent and bonded by the sealing parts of the left and right sides and the sealing part 3 of the upper side, and the center is divided by a perforated sealing part into upper and lower compartments 5 and 6. A microporous membrane sheet 7 is laterally provided on one side face of the upper compartment 5 in the form of a band, and a deliqtuescent moisture absorbent 8 is packed in the compartment 5. Consequently, the non-sealed part of the perforated sealing part is used as the passage for the deliquescent liq., and the structure is simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifying packaging bag suitable for hanging in clothes dance, push-in, shoe box, etc.

[0002]

2. Description of the Related Art Conventionally, as this type of dehumidifying packaging bag,
The bag is divided into upper and lower parts, the upper half of the bag is made of a microporous membrane sheet, and the lower half of the bag is made of a transparent film such as vinyl. A net-like material smaller than the diameter was provided, and a deliquescent hygroscopic agent such as calcium chloride or magnesium chloride was contained in the upper half of the bag body so that the lower half of the bag body became a deliquescent liquid storage tank. Something is known (for example, Shoukai 58-
(See Japanese Patent No. 86234).

[0003]

However, the above dehumidifying packaging bag is composed of a microporous membrane sheet, a transparent film and a mesh, and has a complicated structure,
In particular, the process of attaching the net-like material requires a lot of labor, which causes a problem of high cost.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a dehumidifying packaging bag having a simple structure and easy to manufacture.

[0005]

In order to achieve the above object, the dehumidifying packaging bag of the present invention is made of a synthetic resin film which is divided into two upper and lower compartments by a lateral perforated seal portion. It is a bag, at least a part of the side surface of the upper compartment is composed of a gas-permeable microporous membrane sheet that does not allow water to pass under normal pressure, and the upper compartment is filled with a deliquescent hygroscopic agent. It is characterized by.

[0006]

In the dehumidifying packaging bag having the above structure, water vapor in the air permeates the microporous membrane sheet and is absorbed by the deliquescent hygroscopic agent in the upper compartment. The unsealed portion of the perforated seal portion serves to drip the deliquescent liquid into the lower compartment.

[0007]

1 is a front view showing an embodiment of a dehumidifying packaging bag according to the present invention, and FIG. 2 is a perspective view showing the packaging bag of FIG. 1 cut in the central longitudinal direction.

The dehumidifying packaging bag is made of a synthetic resin film in the shape of a bag. As shown in the figure, the sealing parts 1 and 2 on the left and right sides and the sealing part on the upper side are bent with the bottom side bent. 3 and is further divided into two upper and lower compartments 5 and 6 by a perforated seal portion 4 which crosses the center. That is, the upper and lower compartments 5 and 6 are connected to each other by the communication hole formed by the non-sealing portion 4a of the perforated seal portion 4. A microporous membrane sheet 7 is laterally provided in a strip shape on one side surface of the upper compartment 5, and the upper compartment 5 is filled with a deliquescent hygroscopic agent 8 such as calcium chloride. In addition, a hole 9 for hanging is formed in the seal portion 3 on the upper side.

The above-mentioned microporous membrane sheet 7 is a gas permeable material having fine pores and impermeable to water under normal pressure, and is a synthetic resin film exemplified by polyethylene, polypropylene, polyfluoroethylene resin and the like. Cold stretching, stretching a film containing a foreign substance, extracting a foreign substance from a film containing a foreign substance, stretching after extracting a foreign substance from a film containing a foreign substance, laminating a nonwoven fabric, hot pressing after interlaced dispersion of a bundle of fibers, It can be obtained by irradiating the film with an electron beam or the like. For example, Luxer (Asahi Kasei), Tyvek (US, DuPont), Jeragard (US, Celanese),
FP-2 (Asahi Kasei), NOP (Nippon Petrochemical), Niftron NTF (Nitto Denki Kogyo), Serpore NW
01 (manufactured by Sekisui Chemical Co., Ltd.), Gore-Tex (manufactured by Gore Co., USA), polyflon paper (manufactured by Daikin Industries) and the like.

Since the synthetic resin film forming the bag and the microporous membrane sheet 7 are adhered to each other, it is preferable to use a material that can be heat-welded with the microporous membrane sheet 7 as the material of the synthetic resin film. For example, polyethylene and polyethylene, polypropylene and polypropylene are preferable because they are the same material and can be welded to each other under the same conditions. Of course, both may be adhered using a commonly used adhesive or pressure-sensitive adhesive.

The dehumidifying packaging bag is sold in a moisture-proof outer bag. At the time of use, it is taken out of the outer bag and is hung on a clothes dance or a closet through the hanging holes 9. When suspended in this manner, water vapor in the air passes through the microporous membrane sheet 7 and is absorbed by the deliquescent hygroscopic agent 8 in the upper compartment 5. The deliquescent liquid 10 generated by this moisture absorption action is the unsealed portion 4 of the perforated seal portion 4.
It is dripped from a into the lower partition wall 6 and does not flow out from the microporous membrane sheet 7 to the surface.

The shape of the dehumidifying packaging bag is shown in FIG.
As shown in FIG. 4, a four-sided sealing bag having a synthetic resin film 11 on one side and a microporous membrane sheet 12 on the other side, which divides the upper compartment 14 and the lower compartment 15 by the perforated seal portion 13, and FIG. As shown in, a microporous membrane sheet 20 is vertically bonded to the synthetic resin film 19 so as to extend over both the upper compartment 17 and the lower partition 18 defined by the perforated seal portion 16. It may be like a three-way seal bag.

[0013]

As described above, in the dehumidifying packaging bag of the present invention, the upper and lower compartments are partitioned by the perforated seal portion, and the non-sealed portion of the perforated seal portion is made of deliquescent liquid. Since it is configured to be a passage for dripping,
It is not necessary to use a separate member such as a net to separate the upper and lower compartments in a communicating state, and a simple structure can be provided.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a dehumidifying packaging bag according to the present invention.

FIG. 2 is a perspective view showing the dehumidifying packaging bag of FIG. 1 cut in the central longitudinal direction.

FIG. 3 is a view showing another embodiment of the dehumidifying packaging bag.

FIG. 4 is a view showing still another embodiment of the dehumidifying packaging bag.

[Explanation of symbols]

 4 Perforated seal section 5 Upper compartment 6 Lower compartment 7 Microporous membrane sheet 8 Deliquescent moisture absorbent 12 Microporous membrane sheet 13 Perforated seal section 14 Upper compartment 15 Lower compartment 16 Perforated seal section 17 Upper compartment 18 Lower compartment 20 Microporous membrane sheet

Claims (1)

[Claims] 1. A bag made of a synthetic resin film, which is divided into two upper and lower compartments by a lateral perforated seal portion, and at least a part of the side surface of the upper compartment is impermeable to water under normal pressure. A dehumidifying packaging bag comprising a gas-permeable microporous membrane sheet and a deliquescent hygroscopic agent filled in the upper compartment.