JP2015150523A - Dehumidifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dehumidifier excellent in moisture absorption efficiency and dehydration efficiency after moisture absorption.SOLUTION: A dehumidifier is formed by storing silica gel in a bag body formed of a nonwoven cloth in which air permeability is in the range of 50-1000 cm/cm-s, and a powdery carbonaceous material adheres on the surface.

Description

  The present invention relates to a dehumidifier, and more particularly to a dehumidifier useful for drying inside a shoe.

  The shoes are generally formed so that water does not enter the inside, and the air permeability between the inside and the outside of the shoes is low. For this reason, moisture such as sweat attached to the inside of the shoe during use of the shoe is unlikely to volatilize outside. The water adhering to the inside of the shoe may cause off-flavors and mold. For this reason, the inside of a shoe is dried by disposing a dehumidifier inside the shoe after use and causing the moisture inside the shoe to absorb moisture.

  Patent Document 1 describes a shoe dehumidifier with a hook as a dehumidifier for drying inside a shoe. In this document, a shoe dehumidifier with a hook is a non-woven bag part filled with a dehumidifier / desiccant mainly composed of silica gel or the like, and each shoe dehumidifier with a hook is one by one. It is described that the moisture contained in the shoe is absorbed by being placed inside the shoe. In addition, this document describes that the dehumidifying agent for shoes with hooks can be repeatedly used by drying, and that an indicator that indicates the moisture absorption state and the drying required state by color change is attached to the approximate center of the surface of the bag part. . Furthermore, this document states that a plastic hook is attached to the upper part of the bag portion, and that this hook is used for removing a dehumidifier for shoes with a hook from a shoe or hanging it on a clothesline when drying. Is described.

In Patent Document 2, as a bag body excellent in powder leakage, heat sealing workability, sealing strength, etc., the first layer of thermoplastic synthetic fiber layer, the second layer of ultrafine fiber layer, and the third layer of the first layer Layers containing thermoplastic synthetic fibers that have a melting point of 30 ° C. or more lower than the melting point of the constituent fibers, and laminated with a laminated nonwoven fabric integrated by thermocompression bonding, with the third layer on the inside, and the periphery that becomes the bag body The laminated nonwoven fabric forming the bag body has a breathability of 1 to 100 cc / cm ² / sec, a maximum pore diameter of 50 μm or less, a powder leakage rate of 10% or less, A bag body having a burst strength of 100 kPa or more and a seal strength of the third layer of 10 N / 25 mm or more is described. In Example 14 of this document, a desiccant for shoes in which a bag formed from a laminated nonwoven fabric with air permeability of 20 cc / cm ² / sec is filled with silica gel is described.

  In Patent Document 3, as a dehumidifying sheet for absorbing and dehumidifying moisture in the air, a drying / dehumidifying agent is subdivided and held between two non-woven fabrics. A dehumidifying sheet is described in which a powder of Bincho charcoal is applied to at least one surface.

Design Registration No. 1146698 JP 2007-197028 A Utility model registration No. 3096946

It is preferable that the dehumidifier used for drying the inside of the shoe absorbs moisture inside the shoe in a short time, that is, has excellent moisture absorption efficiency, so as not to generate a strange odor or mold inside the shoe. Furthermore, it is preferable that the dehumidifying tool after absorbing moisture is dried to release moisture to the outside in a short time, that is, excellent in drying efficiency so that it can be reused in a short time.
Accordingly, an object of the present invention is to provide a dehumidifier having excellent moisture absorption efficiency and drying efficiency after moisture absorption.

The present inventor has silica gel accommodated in a bag formed of a non-woven fabric having air permeability in the range of 50 to 1000 cm ³ / cm ² · s and having a powdery carbonaceous material attached to the surface. Compared with the conventional dehumidifier in which silica gel is contained in a bag formed of a non-woven fabric having a breathability of about 20 cm ³ / cm ² · s, the dehumidifier thus obtained has a moisture absorption efficiency and after moisture absorption. As a result, the present invention was completed.

Therefore, in the present invention, silica gel is contained in a bag formed of a nonwoven fabric having air permeability in the range of 50 to 1000 cm ³ / cm ² · s and having a powdery carbonaceous material attached to the surface. The dehumidifier is housed.

Preferred embodiments of the dehumidifying tool of the present invention are as follows.
(1) The air permeability of the nonwoven fabric is in the range of 105 to 1000 cm ³ / cm ² · s.
(2) For drying shoes.

  Since the dehumidifying tool of the present invention is excellent in moisture absorption efficiency, it can be advantageously used as a dehumidifying tool in an environment with low air permeability such as the inside of a shoe. Further, since the dehumidifying tool of the present invention is excellent in drying efficiency, it can be advantageously used as a dehumidifying tool for articles used daily such as shoes.

It is a top view of an example of the dehumidification tool for drying inside the shoes according to the present invention. It is the sectional view on the AA line of FIG.

The dehumidifying tool of the present invention has a high air permeability in the range of 50 to 1000 cm ³ / cm ² · s, and a bag formed of a nonwoven fabric having a powdery carbonaceous material attached to the surface thereof. Silica gel is contained.

Breathable nonwoven fabric used in the present invention is preferably in the range of 105~1000cm ³ / cm ² · s, and more preferably in the range of 105~500cm ³ / cm ² · s. In addition, in this invention, the air permeability of a nonwoven fabric is the value measured by the method described in 6.8.1 Frazier form method of JIS-L-1913: 2010 (general nonwoven fabric test method). Examples of the material of the nonwoven fabric include polyolefin fibers such as polyethylene and polypropylene, polyamide fibers such as polyamide 6 and polyamide 66, and polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, copolymer polyester, and aliphatic polyester. .

  The powdery carbonaceous material is preferably attached to an area of 50% or more with respect to the entire surface of the bag body, and particularly preferably attached to an area of 80% or more. Examples of the powdery carbonaceous material include charcoal powder, bamboo charcoal powder, activated carbon powder, carbon black powder, and graphite powder. The powdery carbonaceous material is preferably a powder of a porous carbonaceous material having functions such as hygroscopicity and deodorization. The powdery carbonaceous material is preferably charcoal powder, and particularly preferably Bincho charcoal powder. As a method for attaching the powdery carbonaceous material to the surface of the nonwoven fabric, a known coating method can be used. As a method of applying the Bincho charcoal powder to the nonwoven fabric, the method described in Patent Document 3 (Utility Model Registration No. 3096946) can be used.

  The silica gel is preferably B-type silica gel. The silica gel is preferably spherical. The particle diameter of silica gel should just be a size which does not leak from the hole of a nonwoven fabric, and is generally the range of 1-10 mm, Preferably it is the range of 2-8 mm, Most preferably, it is the range of 3-5 mm.

  Next, the dehumidifier of the present invention will be described with reference to FIGS. 1 and 2 of the accompanying drawings, taking a dehumidifier for drying inside a shoe as an example. FIG. 1 is a plan view of an example of a dehumidifying tool for drying inside a shoe according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  In the dehumidifier shown in FIGS. 1 and 2, the bag 1 is formed by superimposing two non-woven fabrics 2a and 2b on each other and bonding the peripheral edges of the two non-woven fabrics 2a and 2b to form a seal portion 3. ing. The powdery carbonaceous material 4 is adhered to the surfaces of the nonwoven fabrics 2a and 2b. In the bag 1, silica gel 5 is accommodated. The bag body 1 has a shape in which one end is tapered in order to facilitate insertion into a toe inside the shoe. Moreover, the hook 6 is attached to the edge part on the opposite side to the taper-shaped edge part of the bag body 1, and when drying the moisture-removing dehumidifier, the hook 6 is used for drying things. You can hang it. In order to grasp the moisture absorption amount of the silica gel, the bag body 1 may be provided with an indicator that indicates the moisture absorption amount by a change in color.

[Example 1]
Bincho charcoal powder was applied to the surface of a nonwoven fabric with air permeability of 140 cm ³ / cm ² · s to create a non-woven fabric with Bincho charcoal. The air permeability of the non-woven fabric with Bincho charcoal was 117 cm ³ / cm ² · s.
The non-woven fabric with Bincho charcoal was cut into a shape with one end tapered to create a non-woven fabric piece with Bincho charcoal (length: 23 cm, width: 10 cm). Two pieces of non-woven fabric with Bincho charcoal were prepared. Two pieces of non-woven fabric with Bincho charcoal are stacked so that the surface coated with Bincho charcoal is on the outside, and the side other than the tapered end of the non-woven fabric piece is sealed, and one end is sealed. A bag body having a tapered portion and an open end opposite to the tapered end was prepared. After introducing 150 g of B-type silica gel (particle size: 3 to 5 mm) from the opening of the bag, the opening of the bag was sealed. And the hook was attached to the sealed opening part, and the dehumidifier as shown in FIG. 1 was manufactured.

[Comparative Example 1]
A dehumidifier was manufactured in the same manner as in Example 1 except that a non-woven fabric having an air permeability of 24.0 cm ³ / cm ² · s was used as the non-woven fabric, and Bincho charcoal powder was not applied to the non-woven fabric.

[Evaluation]
About the dehumidification tool manufactured in Example 1 and Comparative Example 1, moisture absorption efficiency and drying efficiency were evaluated by the following methods. The results are shown in Table 1 below.

(1) Evaluation Method of Moisture Absorption Efficiency A sample dehumidifier is dried at a temperature of 50 ° C. for 24 hours, and the mass (W ₁ ) of the sample after drying is measured. The sample is placed in a thermo-hygrostat whose temperature is 25 ° C. and relative humidity is adjusted to 90%, and is allowed to stand for 24 hours. After standing, the sample is taken out of the constant temperature and humidity chamber, and the mass (W ₂ ) of the sample is measured. The water absorption rate of the sample is calculated from the following formula.
Water absorption (mass%) = 100 × (W ₂ −W ₁ ) / W ₁

(2) Drying efficiency evaluation method In the above (1) Hygroscopic efficiency evaluation method, the sample taken out of the thermo-hygrostat is put into a xenon weatherometer SX75 (manufactured by Suga Test Instruments Co., Ltd.) and subjected to the following test. Let stand for 6 hours under conditions.
Test conditions: irradiation only, irradiance 60 W / m ² (wavelength 300 to 400 nm), black panel temperature 63 ° C., temperature 25 ° C., humidity 20%
After standing, the sample is taken out from the xenon weatherometer SX75, and the mass (W ₃ ) of the sample is measured. The moisture reduction rate of the sample is calculated from the following formula.
Moisture reduction rate (mass%) = 100 × (W ₃ −W ₁ ) / (W ₂ −W ₁ )

Table 1
────────────────────────────────────────
Moisture absorption efficiency [Water absorption rate (% by mass)] Drying efficiency [Moisture reduction rate (% by mass)]
────────────────────────────────────────
Example 1 40.6 65.4
────────────────────────────────────────
Comparative Example 1 23.1 56.5
────────────────────────────────────────

  From the results in Table 1, it can be seen that the dehumidifying tool of Example 1 according to the present invention has higher moisture absorption efficiency and higher drying efficiency after moisture absorption than the dehumidifying tool of Comparative Example 1.

DESCRIPTION OF SYMBOLS 1 Bag 2a, 2b Nonwoven fabric 3 Seal part 4 Powdery carbonaceous material 5 Silica gel 6 Hook

Claims (3)

A dehumidifier having a breathability in the range of 50 to 1000 cm ³ / cm ² · s and containing silica gel in a bag formed of a nonwoven fabric having a powdery carbonaceous material attached to the surface. . Dividing Shimegu of claim 1, the air permeability of the nonwoven fabric is in the range of 105~1000cm ³ / cm ² · s.   The dehumidifying device according to claim 1, which is used for drying inside a shoe.

Images