JP2010112841A - Deodorization effect confirmation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorization effect confirmation method capable of confirming a deodorization effect of a fiber structure easily by a simple method. <P>SOLUTION: In this deodorization effect confirmation method for confirming the deodorization effect of the fiber structure, a reagent for odor confirmation including a pH indicator and an odor forming material is sprayed onto the fiber structure. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a deodorizing effect confirmation method capable of confirming the deodorizing effect of a fiber structure by a simple and simple method.

Since the fiber structure has a fiber structure and a large specific surface area, it tends to absorb the odor-forming substance. In particular, in the case of clothing, for example, body sweat is adsorbed and decomposed on fibers to form a substance having an unpleasant odor. A typical odor-forming substance is ammonia having an irritating odor.
On the other hand, in recent years, development of products in which deodorizing properties are imparted to fiber structures has been actively conducted. Specifically, for example, a deodorant is kneaded into a polymer compound for spinning, mixed and spun to form a fiber structure, a padding method, an impregnation method, an exhaustion method, a spraying method for a fabric or knitted fabric A method of applying a deodorant by a post-processing method such as a method or a coating method and immobilizing the fiber structure by drying or the like is used.

As a method for confirming the degree of the deodorizing effect of the fiber structure having such a deodorizing effect, a method for detecting by the sense of smell of the tester has been conventionally performed. However, such a method cannot objectively verify the deodorizing effect and has low reliability.
In addition, although a method for measuring odor using instrumental analysis has been performed, the threshold value of odor generated by the odor-forming substance is small, and for example, gas chromatography as shown in Patent Document 1 is used for measurement. Therefore, it is difficult to confirm the deodorizing effect of the fiber structure at a low cost by a simple method.
JP 2002-235280 A

This invention provides the odor confirmation method which can confirm the deodorizing effect of a fiber structure by a simple and simple method.

The present invention is a deodorization effect confirmation method for confirming the deodorization effect of a fiber structure, and is a deodorization effect confirmation method for spraying an odor confirmation reagent containing a pH indicator and an odor-forming substance on the fiber structure. . The present invention is described in detail below.

According to the present invention, it is not necessary to detect the odor based on the odor sense of the tester as in the prior art, and the presence or absence of the deodorizing effect in a wide range can be confirmed by a highly reliable method. Further, odor can be confirmed quickly and inexpensively without using expensive equipment such as gas chromatography. Furthermore, by using a pH indicator, the presence of an odor-forming substance can be visually confirmed, and a portion where a lot of odor-forming substances are present and a portion where there is no odor-forming substance can be determined at a glance.

A specific method for confirming the deodorizing effect of the fiber structure using the method of the present invention is shown below.
First, an odor confirmation reagent containing a predetermined amount of phenolphthalein as a pH indicator and ammonia as an odor-forming substance is prepared. At this point, phenolphthalein is reddish purple indicating that it is alkaline. Next, the odor confirmation reagent is put in, for example, a sprayer or the like and sprayed onto the fiber structure to be measured.
As a result, when sprayed onto a fiber structure having a deodorizing effect, ammonia is trapped in the fiber structure, so that the phenolphthalein in the odor confirmation reagent becomes neutral and colorless.
On the other hand, when sprayed on a fiber structure that does not have a deodorizing effect, ammonia is still present in the odor confirmation reagent, and phenolphthalein remains reddish purple indicating alkalinity. However, as the ammonia evaporates over time, the phenolphthalein becomes colorless.
Thereby, the presence or absence of the deodorizing effect of the fiber structure can be visually confirmed.

In the present invention, examples of the fiber structure as an object include, for example, yarns, cotton, woven and knitted fabrics, nonwoven fabrics, polyethylene films, polypropylene films, and other papers, synthetic papers, and secondary materials using these. Products and the like.
Examples of the constituent fibers include natural fibers such as cotton, hemp, silk, and wool, regenerated fibers such as viscose-rayon, semi-synthetic fibers such as acetate-rayon, synthetic fibers such as polyester, nylon, and acrylic, And composite fibers made of these blends, synthetic yarns, blends, union knits and the like. Furthermore, you may use the fiber which has an unevenness | corrugation, cotton, and the porous fiber which has a macro void.

The odor confirmation reagent contains a pH indicator.
The pH indicator can be appropriately selected according to the odor-forming substance and the like. For example, picric acid, methyl violet, o-cresol red, thymol blue (TB, two-stage discoloration), 2,4-dinitrophenol, Congo Red, methyl orange (MO), methyl yellow, bromophenol blue (BPB), bromocresol green (BCG), methyl red (MR), litmus, methyl purple, bromocresol purple, chlorophenol red, bromothymol blue (BTB) , P-nitrophenol, neutral red, phenol red (PR), p-naphtholphthalein, cresol red, thymol blue, phenolphthalein (PP), thymolphthalein, alizarin yellow R, 1,3,5-tri Toro benzene, and the like.
Of these, phenolphthalein is preferred.

In the odor confirmation reagent, the preferable lower limit of the content of the pH indicator is 0.01 g / L, and the preferable upper limit is 10 g / L. If the content of the pH indicator is less than 0.01 g / L, the odor may not be sufficiently confirmed. Even if content of the said pH indicator exceeds 10 g / L, the improvement of an odor confirmation effect is not seen. The minimum with more preferable content of the said pH indicator is 0.05 g / L, and a more preferable upper limit is 2 g / L.

The reagent for confirming odor usually contains a solvent for dissolving the phenolphthalein. Examples of the solvent include water and alcohol.
Of these, water and ethanol are preferable.

As the odor-forming substance, a substance that is a target for deodorizing the fiber structure can be used, and examples thereof include ammonia, isovaleric acid, acetic acid, caproic acid, hydrogen sulfide, and the like.

In the odor confirmation reagent, the preferable lower limit of the content of the odor forming substance is 0.01 g / L, and the preferable upper limit is 10 g / L. If the content of the odor-forming substance is less than 0.01 g / L, the odor confirmation reagent may be insufficiently colored. If the content of the odor-forming substance exceeds 10 g / L, the odor may not be sufficiently confirmed. The minimum with more preferable content of the said odor forming substance is 0.1 g / L, and a more preferable upper limit is 2 g / L.

Although it does not specifically limit as a method of spraying the said reagent for odor confirmation on a fiber structure, For example, it is preferable to spray on a fiber structure in the state made into the mist using a sprayer etc.

In the present invention, unlike the prior art, it is not necessary to detect the odor by the sense of smell of the tester, and the presence or absence of the deodorizing effect in a wide range can be confirmed by a highly reliable method. Further, odor can be confirmed quickly and inexpensively without using expensive equipment such as gas chromatography. Furthermore, by using a pH indicator, the presence of an odor-forming substance can be visually confirmed, and a portion where a lot of odor-forming substances are present and a portion where there is no odor-forming substance can be determined at a glance.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

(Example)
(Preparation of odor confirmation reagent)
1 g of phenolphthalein was added to a mixed solvent of 90 mL of ethanol and 10 mL of water and mixed with stirring. 30 mL of the resulting solution was mixed with 3 mL of 25% aqueous ammonia, and water was added so that the total volume became 1 L to prepare an odor confirmation reagent.
The obtained odor confirmation reagent had an ammonia concentration of 0.75 g / L, a phenolphthalein concentration of 0.3 g / L, and was reddish purple.

(Confirmation of deodorizing effect)
The obtained odor confirmation reagent is put into a sprayer, and the underwear A (GUNZE, “THE GUNZE”) is sprayed three times from a position 10 cm away and sprayed on the underwear A. The deodorizing effect was confirmed. The deodorizing effect was confirmed by the same method as the underwear A even for the underwear B (manufactured by Gunze Co., Ltd., “Comfort Studio”) that has not been subjected to deodorization processing. In addition, about 0.2 mL of the odor confirmation reagent was sprayed by one injection.
Moreover, the underwear A and the underwear B were folded in half, and the odor confirmation reagent was sprayed and sprayed at the same time, and the deodorizing effect of both was compared.
As a result, when sprayed to the undergarment A, the adhering odor confirmation reagent instantly became colorless, whereas when sprayed to the undergarment B, it was still red even when 30 seconds had elapsed since the spraying. It remained purple.
In addition, the photograph which image | photographed the underwear A before spraying of the reagent for an odor confirmation at the time of spraying, 5 seconds after spraying, and 10 seconds after spraying is shown in FIG.1, FIG.2, FIG.3 and FIG.4, respectively. In addition, photographs of underwear B taken before, during, after 5 seconds, after 10 seconds of spraying, and after 30 seconds of spraying are shown in FIG. 5, FIG. 6, FIG. 7, FIG. 9 shows. Furthermore, photographs of underwear A and B before and after spraying the odor confirmation reagent when the odor confirmation reagent was sprayed simultaneously on the underwear A and the underwear B are shown in FIGS. 10 and 10, respectively. 11 and FIG. In the photographs shown in FIGS. 10 to 12, the right is underwear A and the left is underwear B.

ADVANTAGE OF THE INVENTION According to this invention, the deodorizing effect confirmation method which can confirm the deodorizing effect of a fiber structure by a simple and simple method can be provided.

In an Example, it is the photograph which image | photographed the underwear A before spraying of the reagent for an odor confirmation. In an Example, it is the photograph which image | photographed the underwear A at the time of spraying of the reagent for odor confirmation. In an Example, it is the photograph which image | photographed the underwear A 5 seconds after spraying of the reagent for an odor confirmation. In an Example, it is the photograph which image | photographed the underwear A 10 seconds after spraying of the reagent for odor confirmation. In an Example, it is the photograph which image | photographed the underwear B before spraying of the reagent for odor confirmation. In an Example, it is the photograph which image | photographed the underwear B at the time of spraying of the reagent for odor confirmation. In an Example, it is the photograph which image | photographed the underwear B 5 seconds after spraying of the reagent for an odor confirmation. In an Example, it is the photograph which image | photographed the underwear B 10 seconds after spraying of the reagent for odor confirmation. In an Example, it is the photograph which image | photographed the underwear B 30 seconds after spraying of the reagent for odor confirmation. In an Example, it is the photograph which image | photographed the underwear A and B before spraying of the reagent for odor confirmation. In an Example, it is the photograph which image | photographed the underwear A and B at the time of spraying of the reagent for an odor confirmation. In an Example, it is the photograph which image | photographed the underwear A and B 10 seconds after spraying of the reagent for an odor confirmation.

Claims (2)

A deodorizing effect confirmation method for confirming a deodorizing effect of a fiber structure, wherein the fiber structure is sprayed with an odor confirmation reagent containing a pH indicator and an odor forming substance. The deodorizing effect confirmation method according to claim 1, wherein the pH indicator is phenolphthalein.