JP5689381B2 - Hair remover and hair removal method - Google Patents

Description

  The present invention relates to a hair removing agent and a hair removing method.

  Commercially used textiles such as hand towels are collected after use, are used again after being subjected to a washing process. These fiber products often have hair attached during use, and a manual removal step is required in the washing step.

  In particular, textile products shipped in a wet state typified by hand towels are extremely unlikely to have their hair naturally removed, so the manual hair removal process cannot be avoided and the processing efficiency is very high. Low.

  On the other hand, Patent Document 1 discloses a method of removing hair by washing with an alkaline agent alone or in combination with a peroxide-based oxidizing agent in a washing step.

  However, this method has a problem that the hair becomes inconspicuous but cannot be completely removed. In addition, it was found that the number of fiber products reused significantly decreased because the amount of the drug used was large and the strength of the fiber was reduced in a short time.

JP 7-48594 A

  The present invention has been made in view of the above, and has a hair removal agent that is excellent in hair removability, has excellent workability because it can be processed in a short time, and further uses a hair removal agent that significantly suppresses a decrease in strength of a textile product. An object of the present invention is to provide a method for removing damaged hair.

The hair remover of the present invention is a fiber product hair remover for removing hair from a fiber product to which the hair is attached. In order to solve the above problems, (A) nitrilotriacetic acid and ethylenediaminetetraacetic acid At least one sequestering agent selected from : (B) at least one alkali metal hydroxide selected from sodium hydroxide and potassium hydroxide; and (C) orthosilicate and metasilicate. It was and also contains at least one silicate, (a) above sequestering agents, in (B) an alkali metal hydroxide, and (C) content of the silicate weight ratio, (a) / (B) = 4/1 to 1/4, (A) / (C) = 9/1 to 1/9, and (B) / (C) = 9/1 to 1/9 And the total content of the component (A), the component (B) and the component (C) is .01～2 shall be used as an aqueous solution by weight.

Hair removal method of textile products of the present invention, the textile product for hair removal agent of the present invention is dissolved in water, the component (A), the total content of the component (B) and component (C) 0. An aqueous solution of 01 to 2% by weight is prepared, and this aqueous solution is heated to 40 to 70 ° C. to immerse the fiber product to which the hair is attached.

  According to the hair removing agent and the hair removing method of the present invention, it is possible to efficiently remove hair without reducing the strength of the fibers during washing. Therefore, the manual hair removal process by an adhesive tape etc. can be skipped and workability | operativity can be improved significantly.

1. Hair Remover The hair remover of the present invention contains (A) a metal sequestering agent, (B) an alkali metal hydroxide, and (C) a silicate as essential components as described above. These are described in detail below.

(A) Metal sequestering agent The hair remover of the present invention can provide excellent hair removability by blending an appropriate amount of a metal sequestering agent. The metal sequestering agent used in the present invention is a chelating agent having an action of sequestering heavy metal ions that adversely affect washing of iron ions, copper ions, etc., and chelating agents exhibiting acidity are preferred. Examples of the chelating agent include aminopolycarboxylic acid, phosphonic acid or phosphonocarboxylic acid, phosphoric acid, organic acid, polycarboxylic acid, amino acid and the like, and alkali metal salts, alkaline earth metal salts, ammonium salts, or Examples thereof include alkanolamine salts. Among these, nitrilotriacetic acid and ethylenediaminetetraacetic acid are preferably used. These metal sequestering agents may be used alone or in combination of two or more.

(B) Alkali metal hydroxide An alkali metal hydroxide also improves hair removability by blending an appropriate amount. Examples of the alkali metal hydroxide include sodium hydroxide and potassium hydroxide. These alkali metal hydroxides may be used alone or in combination of two or more. .

(C) Silicate The silicate contributes to the improvement of the embrittlement prevention property of the fiber by blending an appropriate amount. Examples of silicates, metasilicates such as sodium metasilicate, include orthosilicates such as sodium orthosilicate, among others, is inexpensive, since it can be easily handled, metasilicate such as sodium metasilicate Salts are preferred. These silicates may also be used alone or in combination of two or more.

  The blending ratio of the (A) metal sequestering agent, (B) alkali metal hydroxide, and (C) silicate (hereinafter, all by weight) is (A) / ( B) = 4/1 to 1/4 is preferable, and 3/2 to 2/3 is more preferable. Moreover, from the viewpoint of excellent hair removability, (A) / (C) = 9/1 to 1/9 is preferable, and 4/1 to 4/3 is more preferable. Furthermore, (B) / (C) = 9/1 to 1/9 is preferable and 4/1 to 4/3 is more preferable from the viewpoint of excellent fiber embrittlement prevention properties.

(D) Bleaching agent and other components In the hair removal agent of the present invention, oxygen-based bleaching agents such as hydrogen peroxide and chlorine-based bleaching agents such as sodium hypochlorite are included as necessary in addition to the above components. Can be used. The amount of the bleaching agent used is not particularly limited, but is usually about 10 to 50% by weight.

  In addition, a bleaching agent may be mix | blended with the hair removal agent of this invention, and can also be added when preparing the aqueous solution of a hair removal agent.

  Moreover, if it is the range which does not deviate from the objective of this invention, the additive normally contained in cleaning agents for textiles, such as a recontamination prevention agent, an antibacterial agent, and a fluorescent agent, can also be contained.

  The hair removing agent of the present invention can be obtained by mixing the above components (A) to (C) and other additives such as a bleaching agent used as necessary.

2. Hair Removal Method In the hair removal method of the present invention, the hair removal agent of the present invention comprising the above-described components is dissolved in water and used as an aqueous solution. The concentration of the components (A) to (C) in the aqueous solution is preferably 0.01 to 2% by weight, more preferably 0.1 to 1% by weight in terms of the total amount (solid content) of each component (A) to (C). preferable.

  The hair removal method of the present invention includes a step of immersing the fiber product to which the hair is attached in the aqueous solution of the hair removal agent of the present invention, and if necessary, may be left still while being immersed, and may be stirred or shaken. A mechanical treatment such as the above may be added.

  The temperature of the aqueous solution at the time of immersion is not particularly limited, and an excellent hair removal effect can be obtained even at a low to medium temperature range of 10 to 80 ° C, but 40 to 70 ° C is preferable because it is a protein. The time for washing with stirring or immersion is not particularly limited, but is preferably about 20 to 30 minutes in view of practicality.

  After the dipping process, it is preferable to squeeze the fiber product and rinse thoroughly with water. After rinsing, the fiber product may be dried according to the purpose of use of the fiber product, or may be used in the next step in a wet state.

Hair removal target that by the present invention is not particularly limited, typically, hand towel, mop, dust control for products such as mats, fiber products such as linen products, such as sheets Sheets cover appropriate.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further more concretely, this invention is not limited to a following example. In the following, unless otherwise specified, the blending amount is based on weight.

[Examples 1-7, Comparative Examples 1-6]
(A) Metal sequestering agent, (B) Alkali metal hydroxide, (C) Silicate, and (D) Oxygen bleach or chlorine bleach as required, dissolved in water An aqueous solution of a hair remover contained at the concentration shown in Table 1 was prepared and adjusted to the predetermined temperature shown in the table. Details of each drug used shown in Table 1 are as follows.

(A) Metal sequestering agent nitrilotriacetic acid (trade name: Kirest 3NTA, manufactured by Kirest Co., Ltd.)
Ethylenediaminetetraacetic acid (trade name: Kirest 2D, manufactured by Kirest Co., Ltd.)
(B) Alkali metal hydroxide Sodium hydroxide Potassium hydroxide (C) Silicate Sodium metasilicate (Product name: Sodium metasilicate pentahydrate, manufactured by Ishida Chemical Industries, Ltd.)
Sodium orthosilicate (trade name: sodium orthosilicate, manufactured by Ishida Chemical Industries, Ltd.)
(D) Other components Oxygen bleach: 35% by weight hydrogen peroxide solution Chlorine bleach: 12% by weight sodium hypochlorite aqueous solution

  Put a cotton wire width (30cm x 30cm) and human hair 0.1g in length 5cm into a targotometer (trade name: Targotometer Model No. TM-4, manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.) An aqueous solution of the hair remover was added so that the width of the cotton swab / the aqueous solution of the hair remover = 1/33 (weight ratio), and was washed for 15 minutes at 100 rpm. After washing, it was dehydrated for 1 minute, rinsed and dehydrated twice, and allowed to dry naturally. In addition, the above “rinsing” was performed by adding water at a ratio of cotton metal width / water = 1/33 (weight ratio) and stirring for 2 minutes each time.

  The cotton gilt obtained above was evaluated for hair removability and fabric embrittlement by the following methods.

<Evaluation method>
(Hair removal)
The presence or absence of hair was confirmed by visual observation.
○: No hair remains.
X: Hair remains.

(Strength of fabric (preventing embrittlement))
One piece of cotton wafer was fixed, and a time from when a weight of 5 kg was attached to the central portion of the opposite piece until the fabric was cut was measured.
A: No cutting for 20 minutes or more.
○: Not cut in 10 minutes, but cut by 20 minutes.
X: Cut in less than 10 minutes.

  As shown in Table 1, it was confirmed that all of the examples were excellent in the hair removal effect while preventing the fibers from becoming brittle. On the other hand, none of the comparative examples was able to obtain a sufficient hair removal effect, and, except for Comparative Example 4, the fabric was significantly weakened.

  The hair removing agent and the hair removing method of the present invention are used for removing hair from textile products such as dust control products such as towels, mops and mats, and linen products such as sheets and sheet covers.

Claims (2)

A hair remover for textiles for removing hair from textiles to which the hair is attached,
(A) at least one sequestering agent selected from nitrilotriacetic acid and ethylenediaminetetraacetic acid , (B) at least one alkali metal hydroxide selected from sodium hydroxide and potassium hydroxide, and (C) Comprising at least one silicate selected from orthosilicates and metasilicates ,
The content ratio of the (A) metal sequestering agent, (B) alkali metal hydroxide, and (C) silicate is (A) / (B) = 4/1 to 1/4 by weight ratio, (A) / (C) = 9/1 to 1/9, and (B) / (C) = 9/1 to 1/9, and
Used as an aqueous solution in which the total content of the component (A), the component (B) and the component (C) is 0.01 to 2% by weight.
The hair removal agent for textiles characterized by the above-mentioned. An aqueous solution in which the hair removal agent for textiles according to claim 1 is dissolved in water, and the total content of the component (A), the component (B) and the component (C) is 0.01 to 2% by weight. Prepared,
A method for removing the hair of a fiber product, comprising the step of heating the aqueous solution to 40 to 70 ° C. and immersing the fiber product to which the hair is attached.