JPS63257598A - Washing method of dry cleaning - 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 (Industrial Application Field) The present invention uses a cartridge filter to
, 1-trichloroethane, hachloroethane, R-
The present invention relates to a dry cleaning method for cleaning clothes using dry cleaning solvents (hereinafter referred to as solvents) such as No. 113 and petroleum solvents.

(Conventional technology) Typical dry cleaning requires 0.5 to 1.0 liter
Cleaning is carried out by applying mechanical force to clothes using a solvent containing soap. The mechanical force is generated by the rotation of a cylinder into which clothing is placed, and this force creates a knocking effect on the clothing itself, facilitating the removal of dirt from the clothing. The role of the solvent is to remove oil bath stains such as fatty acids and fats and oils from clothing. In addition, soaps that combine various surfactants remove oil-soluble stains that cannot be removed with solvents and water-soluble stains such as salt contained in sweat, while also removing stains dispersed in bath additives. It prevents the phenomenon of re-adhering to clothing (hereinafter referred to as re-contamination) and increases flexibility and
It has the role of imparting the ability to prevent acne.

Solvents contaminated during dry cleaning are cleaned by distillation or filtration with an adsorbent and used again to wash clothes, but recently, with the reduction of distillation costs and streamlining of workability, cleaning of solvents using cartridge filters has been adopted. is increasing.

Cartridge filters are equipped with adsorbents such as activated carbon, silica del, activated clay, and porcelain to remove pigments, moisture, and acids in order to purify solvents, and filter media such as paper filters to remove solid particles. It consists of a cartridge element and a filter case in which the cartridge element is installed. The solvent contaminated by dirt eluted and separated from the clothing is cleaned by the adsorption action of the adsorbent of the cartridge element and the filtration action of the filter medium.

The conventional one-lie cleaning method using this cartridge filter is summarized using FIG. 1. First, the liquid supply step involves pumping the solvent in the tank 1 into the cylinder 2 via the pump 5 and the pulp 8°9.12. Second, a specified amount of soap is poured into the soap inlet 6 and pulp 14 for the amount of solvent pumped up, and the solvent is cleaned through the button trap 4, pump 5, cartridge filter 3, pulp γ, 10, 11, and 12. The third step is the draining and dewatering step in which the solvent after washing is returned to the tank 1 via the button trap 4 and the pulp 7.8, and the fourth step is the pump 5 and cartridge filter. 3, Pulp 8,
The process consists of a drying process in which the solvent in the tank 1 is cleaned through the cylinders 10, 11, and 13 and the clothes in the cylinder 2 are dried, and a fifth process is a deodorizing process in which solvent vapor that cannot be recovered in the cylinder is removed.

(Problems to be Solved by the Invention) In the cleaning process in which soap is added to the solvent pumped up in the liquid supply process for circulation cleaning, the absorbent filled in the cartridge element is washed from the clothes. In addition to the removed dirt, the ingredients in the soap you put in are also adsorbed. In particular, ionic surfactants such as anionic surfactants and cationic surfactants in soap are adsorbed, resulting in an imbalance in the soap's component composition and the soap's original role being lost. This phenomenon becomes noticeable after 50 to 100 cleanings immediately after replacing a cartridge element that has sufficient adsorption capacity for the adsorbent. Therefore, dry cleaning during this period does not sufficiently remove stains from clothing, leading to problems such as re-contamination and lack of flexibility and antistatic ability, making it impossible to perform high-quality dry cleaning. .

The present invention is proposed to solve the drawbacks and problems of the prior art. In other words, dry cleaning using cartridge filters improves the removal of dirt from clothing regardless of the number of times the cartridge element is used.
Furthermore, the purpose is to effectively perform the original role of soap by suppressing re-contamination, imparting flexibility and antistatic ability, and always perform stable, high-quality dry cleaning.

(Means for Solving the Problems) The present inventor has completed the present invention as a result of intensive studies to achieve the above object.

That is, the present invention provides, in a dry cleaning cleaning process using a cartridge filter, a first step of cleaning for a certain period of time through the cartridge filter;
This dry cleaning cleaning method includes a second step in which soap is added after the first step and cleaning is performed for a certain period of time without passing through a cartridge filter.

In the second step, there are two methods: a circulation cleaning method that uses bypass piping and a bong 7'' that does not involve a cartridge filter, and a patch cleaning method that uses a cylinder rotation without using a bypass piping or pump. You can also use this method.

(Function) After the liquid supply process is completed, a cleaning process having the structure of the present invention is carried out, and in the first process, the washing action of the clothing itself due to the rotation of the cylinder and the washing action of the solvent cleaned by the cartridge filter prevents adhesion to the clothing. Of the stains that are present, oil-soluble stains and solid particles 7 that easily fall off from clothing and are easily eluted and separated by solvents can be removed. In the second step, in addition to the washing action of the clothing itself and the washing action of the solvent, the washing action of the soap added is fully demonstrated, so oil-soluble stains, water-soluble dirt and solids that were not completely removed in the first step are removed. While it effectively removes particulate stains, the soap captures the fraction of stains in the bath agent, preventing re-contamination, and the active ingredients of the soap are adsorbed onto clothing, improving its flexibility and anti-fresivity properties.

(Effects of the Invention) As described in detail above, according to the dry cleaning method of the present invention, the role of soap during cleaning can be effectively demonstrated regardless of the number of times the cartridge element is used. Can be done.

Therefore, compared to conventional cleaning methods, it improves the removal of stains from clothing, reduces re-contamination, and has excellent flexibility and antistatic ability, making it possible to consistently perform high-quality dry cleaning.

Furthermore, since there is no need to add more soap than necessary or to add auxiliary agents such as softeners and antistatic agents, it is highly economical and the cleaning ability of the cartridge filter can be maintained for a long period of time.

(Example) Hereinafter, an example of the dry cleaning method of the present invention will be described with reference to FIG.

1.1.1-1-lichloroethane 200 was used as a solvent in a dry cleaning machine (Sanyo SCL-915), and the cartridge filter 3 had a diameter of 3251 m.
461: Six unused cartridge elements of JWN length are installed. For the soap, I used commercially available So7'' which contains an anionic and nonionic surfactant.As for clothing, I used a variety of clothing including school uniforms, suits, pants, cool clothes, cotton, acrylic, cotton and polyester. Test fabrics such as carbine-stained cloth and white cloth made by Fabrysta, water-soluble contaminated cloth made by Cleaning Research Institute, and commercially available 100% wool and 100% acrylic blankets were washed.

As a preliminary operation before group cleaning, 200t 1.
1! - 1 ton of soap, which corresponds to 0.5 parts per trichloroethane, was put into the tank, and the liquid was circulated through the tank f5, cartridge filter 3, and pulp 8,10°11.13 (i = 30 minutes).

In this embodiment, 60 tons of 1.1.1-1-lichloroethane is supplied to the cylinder 2 in the same manner as the conventional method. After the liquid supply step, the gold washing time was set to 5 minutes, and the button trap 4, pump 5, cartridge filter 3, pulp 7.10, 1
1. Wash the clothes for 6.5 minutes while cleaning the bath agent through step 12.

Next, after 6.5 minutes have passed, pump 5 is stopped.
Close the soap inlet 6 and pulp 14 to supply 0.5 of the amount of liquid.
300 cc of soap corresponding to a trough was added and the cylinder 2 was rotated to wash the cylinder 2 for 1.5 minutes. After the cleaning process was completed, a 6-minute draining and deliquid process, a 15-minute drying process at 50°C, and a 2-minute deodorizing process were performed in the same manner as before. The cleaning results using this method are shown in Table 1.

For comparison, a dry cleaning method using a conventional cleaning process, i.e., 601 i, 1. Supply i-trichloroethane and 60°C from soap inlet 6 and pulp 14.
After adding the soap C, wash the clothes for 5 minutes while cleaning the solvent through the material tongue trap 4, pump 5, cartridge filter 3, and pulp 7.10, 11.12. A draining and deliquid process, a drying process for 15 minutes at 50°C, and a deodorizing process for 2 minutes were performed.

The results are also shown in Table 1.

The soap concentration in Table 1 is the one after 1 minute has passed after adding the soap to the bath agent.
It was measured by the nibton method of 0). This soap concentration is
The more the concentration corresponds to the input amount, the more the soap can fully perform its original role. The cleaning rate and recontamination rate were calculated using the following formulas by measuring the reflectance of the test fabric before and after cleaning using a colorimeter.

The higher the washing rate and the lower the recontamination rate, the better for clothing.

WO: Reflectance of original cloth (white cloth) (%) Wl: Reflectance of contaminated cloth before washing (%) W2: Reflectance of contaminated cloth after fc cleaning (%) W6: Reflectance of white cloth after washing ( %) After the completion of all the processes, the softness of the wool and acrylic blankets placed in the cylinder 2 was examined by touch, and the antistatic ability was examined by the presence or absence of static electricity generation.

Table 1

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an apparatus for implementing the present invention and a conventional method. In the figure, 1 is a tank, 2 is a cylinder, 3 is a cartridge filter, 4 is a button trap, 5 is a pump, 6 is a soap inlet, and γ. 8.9,10. It, 12, 13 and 14 indicate pipes/space piping.

Claims (1)

[Claims] In the washing process of dry cleaning using a cartridge filter, the first step is to wash for a certain period of time through the cartridge filter, and the second step is to add soap after the first step and wash for a certain period of time without going through the cartridge filter. Dry cleaning cleaning method consisting of