JPS63190074A - Method for washing diaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of cleaning diapers. For more details,
This invention relates to a method for cleaning diapers that have special fecal stains different from the laundry clothes of -a, such as rental diapers for adults used for bedridden elderly people and rental diapers for children used for newborn babies.

[Conventional technology and its problems]

Conventionally, in the conventional method of washing diapers, since the clothing is heavily soiled, it is usually first pre-washed with water, and then the main washing is carried out using detergent, alkaline agents, or bleach. Although cleaning is performed at a high temperature of 60 to 80° C. in combination, the removal of dirt is insufficient and re-cleaning is often performed.

Remaining dirt that has not been removed by main cleaning and re-cleaning is often even more difficult to remove after passing through the drying process.
It has been desired to develop a cleaning agent or cleaning method that can effectively remove dirt.

[Means for solving problems]

The inventors of the present invention have conducted extensive research aimed at solving these problems and completely cleaning diapers of fecal stains, and have found that this objective can be achieved by adopting the two-step cleaning method shown below. Heading: The present invention has been completed.

That is, the diaper cleaning method of the present invention includes, as a first step,
This cleaning method is characterized in that the diaper is first pre-washed with an alkaline solution containing a water-soluble polymer compound to remove dirt, and then, as a second step, the diaper is main-washed using a cleaning solution containing a chlorine bleach. According to such a cleaning method, yellow stains derived from feces can be almost completely removed and a clean diaper can be obtained. Further, according to the cleaning method of the present invention, there is no need to repeat the main cleaning many times as in the conventional method.

In the present invention, preliminary cleaning with an alkaline solution containing a water-soluble polymer compound is performed in the first step. Preliminary cleaning using only an alkaline solution without adding a water-soluble polymer compound cannot remove stains well. In addition, in the present invention, stains cannot be completely removed in the first step alone, but in the second step, the main cleaning step of cleaning with a cleaning solution containing chlorine bleach removes stains from the diaper. It can be almost completely removed.

Specific examples of the water-soluble polymer compound used in the present invention include homopolymers of acrylic acid and/or methacrylic acid, i.e., polyacrylic acid, polymethacrylic acid, acrylic acid-methacrylic acid polymers (hereinafter referred to as (hereinafter referred to as a homopolymer for convenience), a copolymer of acrylic acid or methacrylic acid and a heptamer copolymerizable therewith, or a salt thereof. Examples of monomers that can be copolymerized with acrylic acid or methacrylic acid include maleic anhydride, itaconic acid, fumaric acid, methyl vinyl ether, ethylene, propylene, styrene, and pyrrolidone carboxylic acid. Although these polymers may be used in an acid state, it is generally preferable to use them in a neutralized salt form.

Examples of the salt include sodium, potassium, ammonium, monoethanolamine, jetanolamine, and triethanolamine salts.

The molecular weight of the water-soluble polymer compound used in the present invention is 10
00 to 20,000 is desirable. Among these, sodium polyacrylate having a molecular weight of 3,000 to 9,000 is particularly preferred.These water-soluble polymer compounds are blended in an amount of 3 to 50% by weight, preferably 10 to 30% by weight, based on the alkaline agent.

The alkaline agent used in the first step of the present invention includes 1
Sodium silicate No. 2, sodium silicate No. 2, sodium silicate No. 3, sodium carbonate, sodium hydroxide, potassium hydroxide, sodium sesquicarbonate, sodium borate, sodium orthosilicate, sodium metasilicate, dibasic sodium phosphate, sodium orthophosphate , sodium birophosphate, sodium tripolyphosphate, and the like.

These alkaline agents can be used at any concentration in the alkaline solution, but in terms of the cleaning effect in main cleaning and drainage, a range of 0.01 to 1% by weight is generally appropriate, and the pH of the alkaline solution is It is preferable that it is 9 or more. Pre-cleaning temperature with alkaline solution is generally 10-50℃
A range of is preferred.

The second stage of main washing can be carried out in the same manner as a conventional method.

Examples of the chlorine bleach used in the main cleaning of the present invention include sodium hypochlorite and chlorinated isocyanuric acid.

The concentration of chlorine bleach used in the cleaning solution is generally 0.001 to 0.1% by weight as available chlorine, preferably 0.005% by weight.
~0.05% by weight.

Oxygen bleaches such as inorganic peroxides and organic peroxides cannot effectively remove stains from diapers.

Further, as the detergent, a commercially available detergent containing soap, a synthetic surfactant alone, or bilgool can be used. The concentration of the detergent used in the cleaning liquid is preferably 0 to 0.5% by weight, more preferably 0.1 to 0.5% by weight.

In the second stage main cleaning, the temperature is 10-30℃ at 50-80℃.
It is common to perform separate washing.

In addition, in the present invention, after the first stage of preliminary cleaning with an alkaline solution containing a water-soluble polymer compound, drainage is performed and dirt in the fecal cleaning solution is removed, and then a cleaning solution containing a chlorine bleach is used for cleaning. It is preferable to perform main cleaning in two stages. After the first stage preliminary cleaning, if the second stage main cleaning is performed without draining the water, the cleaning will be hindered by re-deposition of dirt, which is not preferable.

〔Effect of the invention〕

By the cleaning method of the present invention, fecal stains on diapers can be effectively removed.

〔Example〕

Hereinafter, the method and effects of the present invention will be specifically explained using Examples.

Example 1 Bilirubin (the main component of bile pigment) was added to cotton broadcloth.
A 0.03% by weight chloroform solution (manufactured by Wako Pure Chemical Industries, Ltd.) was applied at 0.5 mZ to create a stain, and after air-drying it was made into a bay-dyed fabric.

Using this contaminated cloth, perform preliminary washing at 40°C for 10 minutes in a prewash alkaline bath under the washing conditions A-L shown in Table 1, then drain the cloth, and then wash it in a main washing bath containing chlorine bleach. The cleaning rate was evaluated by washing at 60°C for 10 minutes.

The evaluation results are shown in Table 1.

The cleaning rate of the bilirubin-contaminated cloth was calculated by measuring the reflectance of the cloth before and after cleaning (measurement wavelength: 460 nm) using the following formula.

Note) 1) Sodium hypochlorite: 5% available chlorine product 2) Chlorinated isocyanuric acid: 60% available chlorine product 3) Percarbonate: 11% available oxygen product 4) Hydrogen peroxide: 16% available oxygen product 5 ) Commercially available detergents: Commercial products containing nonionic activators, soaps, and sodium tripolyphosphate (trade name: Lan Ace P2O0,
(manufactured by Kao ■) Example 2 We obtained used diapers from a hospital and put them in a commercial washing machine MO.
Washing was carried out using Method A (method of the present invention) and Method B (comparative method) shown in Table 2 using X-20 (manufactured by Tokyo Rinsen Kikai Seisakusho).

The ratio of the weight of the rental diaper to the amount of water is 8 kg (weight of the rental diaper)/401 water amount (bath ratio 115).

After washing and drying, we observed with the naked eye how much dirt was removed from the rental diapers, and it was clear that the rental diapers washed using method A had fewer stains and were better at removing stains overall than those using method B. Ta.

Table 2

Claims (1)

[Scope of Claims] 1. A method for cleaning diapers, which comprises pre-washing the diaper with an alkaline solution containing a water-soluble polymer compound, and then main-washing the diaper with a cleaning solution containing a chlorine bleach. 2. The water-soluble polymer compound is a homopolymer of acrylic acid or (and) methacrylic acid, or a copolymer of acrylic acid or methacrylic acid and a monomer that can be copolymerized with it;
or a salt thereof.The cleaning method according to claim 1. 3. The molecular weight of the water-soluble polymer compound is 1000 to 2000
0. The cleaning method according to claim 1, wherein the cleaning method is 0. 4. The alkaline solution contains 0.01 to 1% by weight of the alkaline agent,
It contains 3 to 50% by weight of a water-soluble polymer compound based on the alkaline agent, and the cleaning solution containing chlorine bleach contains 0.001 to 0.1% by weight of chlorine bleach as available chlorine. A cleaning method according to claim 1, which comprises: