JPH08168729A - New washing method - Google Patents

Abstract

PURPOSE: To obtain a washing method of a pressurized type spray washer used in a coin-operated car wash, a non-brush gantry car washer, washing of the body of a car, building washing, tableware washing and the like. CONSTITUTION: When water or general washing liquid is sprayed in a pressurized state to perform washing, powdery sodium hydrogencarbonate or a powdery organic acid is added to a detergent and spraying is done to a surface to be washed in a time interval during which it is not dissolved to sharply increase detergency by physical action of undissolved particles, and also after washing, it is dissolved in and neutralized with the detergent and discharged. In this way, a washing method which is safe to the human body and is made pollution-free is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing method of a pressure type spray washing machine used in a coin car wash, a non-brush gate type car wash, a car body wash, a building wash, a dish wash and the like.

[0002]

2. Description of the Related Art Usually, in washing with a pressure type spray washing machine, water, a detergent containing various surfactants in water, or a detergent containing an alkali builder added thereto is used. However, under the present circumstances, it is impossible to remove stains that can be removed immediately by rubbing lightly with the fingertip. Therefore, although a strong alkaline detergent containing a large amount of an alkaline builder is applied to the surface to be cleaned to raise the dirt and then the surface is cleaned with a high pressure spray, sufficient cleaning power cannot be obtained.

[0003]

However, the above-mentioned cleaning agents and cleaning methods have insufficient cleaning power, and a large amount of strong alkaline components are drained, which is a serious problem in terms of pollution. In order to prevent this, a wastewater treatment facility that can be drained after neutralization is required, resulting in a large amount of equipment cost and the need to fix the washing machine. On the other hand, as another cleaning method, inorganic substances, resins, and other powders that are insoluble in water are blended in the cleaning agent of the pressure-type spray cleaning machine, and sprayed onto the surface to be cleaned so that the particles have a physical action. It is known that the cleaning power can be remarkably enhanced, but after cleaning, powder that does not dissolve in water adheres to and accumulates on the surface to be cleaned and near the surface to be cleaned, and these treatments are impossible, resulting in pollution and aesthetics. The current situation is that the problem of drainage is not widely used.

[0004]

The present invention has been completed to solve the above-mentioned problems, and claims 1, 2 and 3
The cleaning methods 3, 4 are proposed. The cleaning method according to claim 1 of the present invention refers to a method in which water or a general cleaning liquid (hereinafter referred to as a cleaning agent) is applied from a powder introducing device from a pressure pump until the cleaning agent is discharged. Sodium hydrogencarbonate powder is added to the cleaning agent quantitatively to some extent, and sprayed from a spray nozzle within a time period in which the sodium hydrogencarbonate powder is not dissolved in the cleaning agent to reach the surface to be cleaned. As a result, the sodium hydrogencarbonate particles in the detergent collide with the surface to be cleaned, and the physical action of the particles remarkably enhances the original cleaning power of the detergent. Since some time elapses after cleaning or until the cleaning is completed, the sodium hydrogen carbonate particles will dissolve in the cleaning agent, and the powder particles will not drain on the surface to be cleaned or in the vicinity thereof and will be drained. This is a cleaning method that will be done.

The sodium hydrogencarbonate used in the present invention is the same as baking soda and baking powder, and is safe for the human body and has a low pH because the pH of the aqueous solution is not high. After the cleaning, if the electromagnetic valve is closed and the sodium hydrogencarbonate powder is not mixed, it is effective to rinse with only the cleaning agent so that the powder particles are less likely to remain. If necessary, an appropriate amount of a surfactant may be added to the sodium hydrogencarbonate powder, and the powder may be added to the detergent from the powder introduction device in a uniformly blended state.

The washing method according to claims 2, 3 and 4 of the present invention is a method in which the sodium hydrogen carbonate used in the washing method according to claim 1 is neutralized after washing and dissolved in a washing agent and then drained. . According to the second aspect of the present invention, the amount of the powdered organic acid necessary to neutralize sodium hydrogen carbonate is uniformly blended with the powdered sodium hydrogen carbonate in advance, and the powdered organic acid is added to the detergent through the powder introduction device. The acid powder particles also enhance the cleaning effect. It should be noted that the powdered organic acid and the powdered sodium hydrogen carbonate may not be blended in advance and may be separately added to the detergent. After washing, weakly alkaline sodium hydrogen carbonate is neutralized by organic acid,
Moreover, it will be dissolved in the cleaning agent and drained, making it safer and more pollution-free.

The powdered organic acid used here is an aliphatic carboxylic acid such as citric acid, oxalic acid, malic acid, adipic acid or fumaric acid, an aminocarboxylic acid such as ethylenediaminetetraacetic acid or nitrilotriacetic acid, or benzoic acid. An aromatic carboxylic acid such as an acid or phthalic acid may be used. In particular, aliphatic carboxylic acids, aminocarboxylic acids and the like are suitable because neutralizing sodium hydrogencarbonate easily generates carbon dioxide gas and causes a foaming state, so that the detergency is further enhanced.

According to a third aspect of the present invention, there is provided a cleaning method in which sodium hydrogen carbonate powder is added to a cleaning agent in which an amount of acid necessary for neutralizing sodium hydrogen carbonate is mixed in advance. Incidentally, the acid and the detergent may be mixed separately in the step before adding the sodium hydrogen carbonate powder. After washing, sodium hydrogencarbonate is neutralized as in claim 2,
Moreover, it will be dissolved in the cleaning agent and drained, making it safer and more pollution-free. The acid used here may be a general organic acid or inorganic acid, and may be in the form of powder or liquid.

The cleaning method according to claim 4 includes:
Unlike items 2 and 3, only the powdered organic acid is added to the detergent from the powder introduction device to enhance the cleaning power by the physical action of the organic acid particles, and it is necessary to neutralize the organic acid in advance. This is a method in which an organic acid powder is added to a detergent mixed with various amounts of sodium hydrogencarbonate for washing. It should be noted that sodium hydrogen carbonate and the cleaning agent may be separately mixed in the step before adding the organic acid powder. After cleaning, the organic acid is neutralized, dissolved in a cleaning agent and drained, which is safer and more pollution-free. Examples of the powdery organic acid used here include the aliphatic carboxylic acids, aminocarboxylic acids, and aromatic carboxylic acids described in claim 2, but the aliphatic organic acids having a fast neutralization reaction with sodium hydrogen carbonate. Carboxylic acids and aminocarboxylic acids are suitable.

The detergent in the present invention is a general detergent containing water or anion, nonion, amphoteric, cationic surfactant and a mixed surfactant thereof as a main component, and also a powder to be sprayed. It is preferable that the size of the body particles is as small as possible because the amount of collision per unit area increases and the effect can be obtained with a small amount. As mentioned above,
This invention, when cleaning the cleaning agent by spraying it under pressure, add powdered sodium hydrogen carbonate or powdered organic acid to the cleaning agent and spray it on the surface to be cleaned within a time that does not dissolve it and dissolve it. This is a safe and non-polluting cleaning method for the human body, in which the cleaning power is remarkably enhanced by the physical action of the particles that have not been discharged, and after cleaning, the particles are dissolved and neutralized in the cleaning agent and drained.

[0011]

【Example】

Evaluation method 1. Detergency After the completion of washing, the degree of dirt removal is visually determined. ◯: Dirt is well removed. Δ: Some dirt is removed. X: Almost no dirt was removed. 2. Retention of powder After completion of cleaning, visually determine how much powder remains on the surface to be cleaned and its vicinity. ○: Almost nothing remains. Δ: A little remains. X: Large amount remains. 3. Problems during drainage After cleaning, the pH of the drainage is measured to determine if there is a problem with pollution. ◯: Almost neutral and no problem. Δ: Weak alkaline, with some problems. X: There is a problem with strong alkalinity.

Formulation Example 1

[Table 1] Formulation example 2

[Table 2] Formulation example 3

[Table 3] Formulation example 4

[Table 4] Comparative formulation example 1

[Table 5] Comparative formulation example 2

[Table 6] (result)

[Table 7]

As is clear from the above results, the compounding examples 1, 2, 3, and 4, which are the examples of the present invention, have good detergency, almost no powder remains, and there is no problem in drainage. However, in Comparative Formulation Examples 1 and 2, the drainage was alkaline and a large amount of powder remained, so that good results were not obtained.

Claims (4)

[Claims] 1. When cleaning by spraying water or a general cleaning liquid under pressure, powdery sodium hydrogencarbonate is added to the water or general cleaning liquid and sprayed onto the surface to be cleaned within a time that does not result in dissolution. A cleaning method characterized in that the cleaning power can be remarkably enhanced by the physical action of particles of sodium hydrogen carbonate, and after cleaning, the cleaning power is dissolved in water or a general cleaning liquid and drained. 2. Powdered sodium hydrogen carbonate and an amount of powdered organic acid necessary for neutralizing sodium hydrogencarbonate in water or a general cleaning liquid when cleaning is performed by spraying water or a general cleaning liquid under pressure. Spraying on the surface to be cleaned within a time that does not lead to dissolution, the cleaning power can be remarkably enhanced by the physical action of sodium hydrogencarbonate and organic acid particles. After cleaning, neutralization and water or general The cleaning method is characterized in that it is dissolved in the cleaning liquid of and is drained. 3. A powdery sodium hydrogencarbonate is added to a mixture of water or a general cleaning liquid and an acid in an amount necessary for neutralizing sodium hydrogencarbonate when the cleaning is performed by spraying water or a general cleaning liquid under pressure. Spraying on the surface to be cleaned within a time that does not lead to dissolution, the cleaning power can be significantly increased by the physical action of the sodium hydrogencarbonate particles, and after cleaning it can be neutralized and washed with water or a general cleaning liquid. A cleaning method characterized by being dissolved and drained. 4. A powdery organic compound is added to a mixture of water or a general cleaning liquid and sodium hydrogencarbonate in an amount necessary for neutralizing an organic acid when cleaning by spraying water or a general cleaning liquid under pressure. An acid is added and sprayed on the surface to be cleaned within a time that does not cause dissolution, the cleaning power can be significantly increased by the physical action of the particles of the organic acid, and after cleaning, neutralization and water or general cleaning liquid can be performed. A cleaning method characterized by being dissolved and drained.