JPS60253497A - Washing method of drycleaning - 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 is applicable to dry cleaning machines that clean clothes, etc. using organic solvents such as perchlorethylene, 1.1.1) lychloroethane, and R113. The present invention relates to a cleaning method.

(Prior Art) A conventional dry cleaning process will be outlined using FIG. First, the clothing 2 is put in through the door 1, and the door 1 is closed to start operation. Generally, the steps proceed in the following order.

(2) The solvent 4 is pumped up from the solvent tank 3 through the valve 5 by the pump 6, and the required amount of the solvent 4 is sent into the processing tank 10 through the path consisting of the valve 7 and the filter 8 or the path consisting of the valve 9.

■, Slowly rotate the processing drum 11 and pour the solvent 4 into the processing tank 1.
0, button trap 12, valve 13, pump 6, valve 7, filter 8, or valve 9.

(2) The liquid is drained through the processing tank 10, button trap 12, valve 13, pump 6, valve 14, and distiller 15, and then the processing drum 11 rotates at high speed to centrifugally separate the solvent 4 in the clothing 2. Drain in the same way.

■Repeat the steps in item 0 and item ■ above.

(3) The liquid is drained into the solvent tank 3 through the path of the processing tank 10, button trap 12, valve 13, and valve 5, and then the processing drum 11 rotates at high speed to centrifuge the solvent 4 in the clothing 2 and drain it. .

■Slowly rotate the processing drum 11 again, and the fan 16,
Air is circulated in the direction of arrow 20 between a recovery air duct 19 consisting of an air cooler 17 and an air heater 18 and a processing tank 10 to dry the clothes 2. The solvent gas evaporated from the clothing 2 is condensed in the air cooler 17, enters the water separator 22 through the recovery path 21, and enters the Tallinn tank 24 through the solvent pipe 23.

(2) When drying is completed, the dampers 25 and 26 open as shown by the broken lines, and fresh air is taken in from the damper 25, and uncondensed solvent gas that cannot be recovered by the air cooler 17 is exhausted from the damper 26, eliminating the solvent odor in the clothing 2. Deodorize.

(2) The solvent 4 that entered the distiller 15 in the step (2) above is evaporated and condensed and recovered in the condenser 27, and the water separator 22,
It enters the Talin tank 24 through the solvent pipe 23 and returns to the solvent tank 3 through the overflow partition plate 28.

Note that the water separated by the water separator 22 is discharged to the outside of the system through a water pipe 29.

Dry cleaning uses organic solvents, so
Due to its properties, oil dissolves fat well.

However, it can hardly be expected to have any cleaning effect on salt, which is one of the main components of sweat, and other water-soluble stains. For this reason, a small amount of cleaning aid (surfactant) is usually added. This cleaning aid has the function of solubilizing water, so by adding it, a small amount of water is dissolved in the solvent to remove hydrophilic stains.

However, the ability of cleaning aids to solubilize water is limited, limiting the amount of water that can be added to the solvent. Incidentally, the cleaning aid is usually added in an amount of 0.5 to 1% by volume based on the amount of solvent, but in this case, water can be dissolved only in an amount of 0.1 to 0.2% by volume at most. For this reason, conventional methods cannot sufficiently remove water-soluble stains, and the current situation is that stain removal is unavoidably carried out through pre-treatment and post-treatment, or washing with water is used in combination.

As a technique for removing water-soluble stains using a solvent, emulsion cleaning is conventionally known, in which a large amount of water and a special cleaning agent are added to perchlorethylene, and the emulsified liquid is cleaned. It is limited to cleaning work clothes (uniforms) made of polyester and polyester blends, and cannot be applied to wool products, which are the main target of dry cleaning, due to its crimp effect (effect that causes the cloth to shrink significantly).

Also, as a recent technology, high concentration (5 to 10 times normal)
Spray a small amount (usually 1/20 to 1/10 of the amount of cleaning bath liquid) of a dry cleaning solvent in which a detergent has been dissolved onto the clothing, then spray a solvent that does not contain a large amount of detergent (or contains a small amount of detergent). However, in practical terms, it is difficult to spray the detergent evenly (especially when under high load), and there are also problems such as not being able to spray enough detergent to areas where water-soluble stains exist. there were.

゛ (Problems to be solved by the invention) The present invention was proposed in order to eliminate the above-mentioned conventional drawbacks, and its purpose is to provide a cleaning method that fully utilizes the characteristics of highly concentrated solvents. It is something.

(Means for Solving the Problem) In order to achieve this object, the present invention includes a dry cleaning method using a highly concentrated solvent, in which a shirt cleaning process using a highly concentrated solvent and a deliquifying process using the same solvent are performed several times. It is designed to be repeated several times.

(Function) Now, in the above-mentioned configuration, the operation of injecting the minimum necessary amount of high-concentration solvent onto the clothing for a certain period of time, removing the liquid, and then re-jaring the recovered liquid onto the clothing is repeated several times.

(Example) An example of the present invention will now be described with reference to the drawings. FIG. 1 shows an apparatus for carrying out the method of the present invention. Note that FIG. 1 shows only the parts related to the cleaning method of the present invention, and the same parts as in FIG. 1 are not shown.

Now, in FIG. 1, a dedicated tank 32 containing a highly concentrated solvent 30 is attached to the button trap 12, and its piping opens into the button trap 12 via a valve 31.
A closed circuit is formed from the button trap 12 to the valve 13 to the pump 6 to the valve 9 to the processing tank 10 to the button trap 12. Further, the processing drum 1 can be rotated for cleaning and for removing liquid by a low speed motor (not shown) or a high speed motor (not shown), respectively. In addition, among the closed circuits, valve 13, pump 6, valve 9
Of course, it may be an independent circuit different from that shown in FIG.

Next, the operation of the embodiment of FIG. 1 constructed as described above will be explained.

(2) Insert clothing 2 through door 1.

(2) Drop the highly concentrated solvent 3o from the dedicated tank 32 into the button trap 12 via the valve 31;

The amount is usually selected to be between 80VG and 150% of the weight of the garment.

(2) A closed circuit is formed with button trap 12→valve 13-4 pump 6-valve 9-processing tank IO-button trap 12, and 3° of highly concentrated solvent is poured onto clothing 2. At this time, the processing drum 11 is rotated for cleaning rotation.

(2) After a certain period of time (for example, after 30 seconds), the processing drum 11 shifts to the rotation for removing liquid, and the pump 6 is stopped during this period. The highly concentrated solvent 30 centrifuged from the clothing 2 stays in the lower part of the processing tank 10 and the lower part of the button trap 12.

(2) After a certain period of time (for example, 15 seconds), the processing drum 11 shifts to washing rotation again, the pump 6 is operated again, and the highly concentrated solvent 30 is poured onto the clothing 2.

(2) Repeat the above (2) and 0 terms multiple times.

■, The processing drum 11 is rotated to remove liquid, and the processing tank 1〇-button trap 12-valve 13-pump 6-valve 14-4
The highly concentrated solvent 30 is drained into the distiller 15 via the distiller 15 route.

■, from ■ to ■ of the process explained in the section of the overview of the conventional method
Implement the process.

Claims (1)

[Claims] A method for dry cleaning using a highly concentrated solvent, characterized in that Java cleaning treatment using the highly concentrated solvent and liquid treatment using the same solvent are repeated several times.