JPH0667375B2 - Cartridge detergent for continuous automatic washing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cartridge detergent used in an automatic washing machine for washing dishes, bottles, containers, trays and the like.

2. Description of the Related Art Automatic dishwashers that wash a large amount of kitchen utensils such as tableware are widely used mainly in restaurants and the like, and in recent years, they are showing signs of widespread use in households.

An automatic dishwasher for business use is usually fed into a dishware or the like to be sprayed with a cleaning agent to remove stains, and then a rinsing aid to be sprayed for finishing treatment. When continuous automatic cleaning is performed in this manner, it is necessary to constantly supply a detergent having a predetermined concentration.

As a detergent supply method, a method of using a liquid detergent and supplying it with a pump or an injector is known. However, since it is handled as a liquid detergent, it has the following drawbacks.

1) It cannot be a highly concentrated detergent.

2) Decomposition of available chlorine in detergent cannot be suppressed.

3) Since the detergent contains a high concentration of alkali, it is not hygienic when leaking from the transport container.

Therefore, a method has been proposed in which a powder detergent is used and then dissolved and supplied. One of these is to put a powder detergent in a reservoir and pour hot water into the reservoir to dissolve and dissolve the washing liquid to be supplied. However, in this overflow method, not only is fine powder scattered during supply to the reservoir, which is unfavorable for hygiene, but the entire detergent is soaked in hot water to utilize this overflow solution, so that it has the following drawbacks.

1) The detergent composition is not uniformly dissolved due to the difference in solubility.

2) Phase separation occurs, making it difficult to mix the surfactant.

3) The available chlorine in the detergent composition is released.

Further, a method is known in which a powder detergent composition is packed in a container to form a cartridge detergent, and hot water is sprayed onto the cartridge detergent to successively dissolve a required amount. FIG. 4 is an explanatory view showing this system, in which a screen (metal mesh) -like cap 12 is provided at the opening of the container 11 containing the powder detergent composition 15. The cartridge detergent is turned upside down and set in the successive dissolving and supplying device 21 as shown in FIG. Hot water (water) is sprayed from the water spray nozzle 27, a predetermined amount of the powder detergent composition 15 is dissolved, and it is supplied as a detergent liquid through a conduit 29.

According to this method, the problems such as the overflow method described above are solved, but when the cartridge is turned upside down and set in the successive dissolution supply device 21, the powder detergent composition 15 spills from the screen 12, There was a problem of causing 29 clogging. In order to deal with this, improvements such as an inversion set method and a method of capping a screen with a small mesh have been attempted, but they have not been sufficient.

On the other hand, a method has been proposed in which a cartridge detergent is used as a solid detergent and this is successively dissolved as shown in FIG. 2 (Japanese Patent Publication No. 59-4480). According to this method, the problem of clogging in the powder detergent is fundamentally solved, but the following problems occur.

1) Since the caustic alkali is heat-dissolved and solidified, it is necessary that the temperature be high during dissolution. If the temperature is low, it takes a long time to dissolve, and the necessary amount cannot be dissolved and supplied in a short time. In commercial kitchens in Japan, there are cases in which water is piped from a water heater to supply hot water, and it is required to dissolve even low-temperature hot water.

2) The manufacturing method of the solid detergent is complicated.

3) A special method is required to stably contain available chlorine. In the example of the publication, a rod-shaped body called a plug is separately prepared and embedded in a solid detergent. Further, it is similarly difficult to mix the surfactant.

OBJECT OF THE INVENTION The present invention, despite the use of powdered and granular detergent compositions,
An object of the present invention is to supply a cartridge detergent which does not cause spilling of powder at the time of setting on a feeding device and can prevent decomposition of available chlorine in the detergent composition during storage.

Constitution of the Invention The cartridge detergent for a continuous automatic washing machine of the present invention is such that the detergent composition is stored in a water-insoluble container having an opening, and the opening is installed with the opening facing downward, and water is sprayed to the opening. In a cartridge detergent for a continuous automatic washing machine, in which the required amount of the detergent composition is successively dissolved and used, the powdery granular detergent composition is stored in the water-insoluble container, and a hydratable inorganic or organic compound It is characterized in that the opening is sealed with a water-soluble solid sealant containing not less than 50% by weight and having a water content of less than 50% by weight.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a structural example of a cartridge detergent of the present invention. The powdery or granular cleaning composition is stored in a container 11 having an opening 13, and the opening 13 is sealed with a solid sealant 17, which is usually capped and stored.
Be stored. At the time of use, the cleaning cartridge 19 is turned upside down and set in the successive dissolution supply device 21 as shown in FIG. Since the cartridge detergent 19 is sealed with the solid sealing agent 17, the powdery granular detergent composition 15 does not spill even if it is inverted when set. When hot water (water) is jetted from the water jet nozzle 27, the solid sealant 17 is first dissolved, then the powdery granular detergent composition 15 is dissolved, and the detergent liquid is supplied from the conduit 29 as a detergent liquid. This first hot water (water) injection dissolves the solid sealant, but since the powdery granular detergent composition forms a continuous film of a semi-solid from the paste on the screen 25, the powdery granular material is thereafter introduced into the conduit 29. It never falls directly.

As the solid sealant 17, a solid hydrated inorganic compound having a water content of less than 50% by weight is used. Solid sealant
The amount of 17 varies depending on the area of the opening 13 and the filling amount of the granular detergent composition 15, but if the area of the opening is 10 to 1000 cm ² at a normal filling amount (1 to 5 kg), 30 to 30 About 100g is suitable. If the amount of the solid sealant is too small, it may be broken by the weight of the filled detergent composition when inverted. On the other hand, if the amount is too large, there is a concern that the detergency of the detergent solution at the time of the first water spray may be reduced.

The cartridge detergent of the present invention, if the powdery and granular detergent composition 15 is stored in the container 11, the hydratable inorganic compound made into a slurry with water is added, and the open surface is sealed by ironing or pouring to solidify. Good. The hydratable compound solidifies as it forms a hydrate with water.

When the water content in the solid sealant exceeds 50% by weight, available chlorine in the powdery or granular detergent composition is decomposed during storage.
The water content in the solid sealant is preferably less than 40% by weight.

Examples of the hydratable inorganic compound include sodium tripolyphosphate, sodium metaphosphate and other phosphates, sodium carbonate, potassium carbonate and other carbonates, sodium orthosilicate, sodium metasilicate and other silicates, caustic soda and caustic potassium water. Examples thereof include oxides and Glauber's salt. Examples of hydratable organic compounds include carboxymethyl cellulose (CMC), sodium polyacrylate, and the like, and the average molecular weight thereof is 10,000 to 20,0.
00 is preferred. Among these, sodium tripolyphosphate and sodium orthosilicate are particularly preferable from the viewpoint of inhibiting the decomposition of available chlorine.

The powdery or granular detergent composition is not particularly limited and may be a conventional one, which is usually an alkali agent, a chelating agent,
It contains a bactericidal agent and a surfactant. As the alkaline agent, sodium hydroxide, potassium hydroxide, sodium metasilicate, sodium tripolyphosphate, sodium pyrophosphate, sodium carbonate, etc. are used. Examples of chelating agents include polyacrylic acid salts, polymaleic acid salts, ethylenediaminetetraacetic acid salts, glyconic acid salts, nitrilotriacetic acid salts, and the like.

As the bactericide, one containing effective chlorine such as sodium dichloroisocyanurate is used.

EFFECTS OF THE INVENTION According to the cartridge detergent of the present invention, since it is possible to adopt the sequential dissolution method by utilizing the powdery granular detergent composition, it is possible to dissolve and supply the required amount in a short time at low temperature and low water pressure, If necessary, an organic surfactant can be added to enhance the detergency. Furthermore, by sealing with the solid sealing agent of the present invention, the powdery or granular detergent composition does not spill when set in the successive dissolving and feeding device, is hygienic, and does not clog the conduit, and The decomposition of available chlorine contained in the powdery granular cleaning composition can be suppressed.

Example 1 Powdery caustic soda 45 wt% Powdery sodium tripolyphosphate 52 wt% Powdery sodium idichlorsocyanuric acid 3 wt% 300 g of a powdery granular detergent composition having the above composition was filled in a cylindrical polyethylene container having a diameter of 80 mm and a height of 100 mm, and From the top, add the slurry-like sealing agents shown in Table 1 below, seal the release surface by ironing or pouring, and solidify 5
A cartridge detergent was prepared by forming an 8 mm sealant layer.

These cartridge detergents were opened in a thermostatic chamber at a temperature of 45 ° C. and a humidity of 65% and left for 15 days to take out a powdery granular detergent composition with a depth of 50 mm from the bottom of the solidified sealant, mix it well, and The available chlorine content was measured to determine the available chlorine residual rate.

The effective chlorine content was determined by adding iodine / potassium iodide aqueous solution to the sample aqueous solution and titrating with a sodium thiosulfate standard solution, and dividing by the effective chlorine content immediately after the production of the powdery granular detergent composition.
The fraction was defined as the effective chlorine residual rate.

Example 2 The cartridge detergent of the present invention and the solid casting detergent described in JP-A-59-4480 were compared and evaluated.

(1) Preparation of the Cartridge Detergent of the Present Invention Sodium granule caustic soda 48.8 wt% Sodium tripolyphosphate 49.7 wt% Sodium dichloroisocyanurate 1.5 wt% Granular detergent composition (effective chlorine: 1.0 in composition)
%), Neck height 50 mm, neck caliber 140 mm, bottom neck diameter 170 mm, depth 12
It was filled in a polyethylene bottle having an internal volume of about 2000 ml of 0 mm.

A sealing agent in the form of a slurry was prepared from 30 g of sodium tripolyphosphate and 20 g of water, and this was put on the above-mentioned powdery or granular detergent composition to seal the open surface, and left to solidify.

(2) Preparation of solid casting detergent Sodium dichloroisocyanurate 59.7wt% Carboxymethylcellulose 14.4wt% Industrial salt 25.9wt% Mix well with the above 3 components, and in an iron pipe with an inner diameter of about 2.5cm and a length of about 15cm. Molding was performed by applying a pressure of about 15 kg / cm ² , and this was extruded to produce a columnar chlorine-containing plug.

Separately from the above, 53.57 parts of 50% caustic soda aqueous solution was added to 55-60
Heat to ℃, dissolve 8.77 parts of anhydrous caustic soda in this,
Then, 35.06 parts of sodium tripolyphosphate were added and mixed and suspended. This was placed in the same container as the cartridge detergent of the present invention, and immediately before the suspension solidified, the above-mentioned chlorine-containing plug was buried almost in the center to prepare a solid casting detergent as shown in FIG.

31 ... Container 33 ... Solid detergent 35 ... Chlorine-containing plug The final composition of this solid casting detergent is as follows, and the content of available chlorine is 1% of the composition.

Caustic soda 35.5wt% Water 26.8wt% Sodium tripolyphosphate 36.1wt% Chlorine-containing plug 2.6wt% (3) Detergency test As an automatic dishwasher, Ishikawajima Harima Heavy Industries Co., Ltd. JWD
The detergency was tested under the following conditions using a -6 type.

・ Operating conditions (1 cycle): Spray cleaning time 40 seconds Rest time 3 seconds Rinse time 15 seconds Rinse water volume 7 l / cycle ・ Cleaning temperature: 60-65 ℃ ・ Active alkalinity: 0.050% ・ Rinse aid: Glycerin monocaprylate 35%, propylene glycol 65%, concentration 0.01% Here, the active alkalinity was expressed as Na ₂ O content (%) by titrating a sample aqueous solution with a normal hydrochloric acid solution using phenolphthalein as an indicator.

Each of the cartridge detergents prepared above was put into a successive dissolution supply device, and tested under the following two spraying conditions.

(4) Evaluation method Commercially available unadjusted milk was used as dirt, the inside and outside of a 200 cc capacity crystal glass was leaked, and the product was air-dried overnight to be washed.

After washing 10 glasses in one cycle, evaluation was performed in 5 stages, and the average value of 5 times is shown in Table-2 and Table-3.

5 points: Completely clean 4 points: 1-2 spots, clean 3 points: 3-5 spots, clean 2 points: No spots but many spots 1 point: Stain remains Under good conditions, the cartridge detergent of the present invention and the solid-pouring detergent of the comparative example have the same cleaning effect, but under bad conditions, the solid-pouring detergent has sufficient cleaning effect. Absent. Since the solid cast detergent is inferior in solubility, the detergent diluted in the rinsing site is not dissolved and replenished within a short period of one cycle, resulting in a decrease in detergency. On the other hand, since the cartridge detergent of the present invention is easily dissolved, the washing power is not significantly reduced.

In a commercial kitchen in Japan, hot water may be piped from a water heater to supply hot water, and it is required that sufficient detergency can be exerted even under adverse conditions such as condition 1.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of the cartridge detergent of the present invention. FIG. 2 is an explanatory view showing a usage state of the cartridge detergent. FIG. 3 is a cross-sectional view showing a solid casting detergent of a comparative example. FIG. 4 is an explanatory view showing a conventional cartridge system. 11 …… Container, 13 …… Open mouth 15 …… Powder and granular detergent composition 17 …… Solid sealant, 19 …… Cartridge detergent 21 …… Sequential dissolution supply device 25 …… Screen, 27 …… Water spray nozzle 29 ……conduit

Claims (1)

[Claims] 1. A detergent composition is stored in a water-insoluble container having an opening, and the opening is installed with the opening facing downward. Water is sprayed to the opening to achieve the required amount of the detergent composition. In a continuous automatic washing machine cartridge detergent to be used after being dissolved, a powdery granular detergent composition is stored in the water-insoluble container, and contains 50% by weight or more of a hydratable inorganic or organic compound and has a water content of 50% by weight. % Of a water-soluble solid sealant is used to seal the opening, and a cartridge detergent for a continuous automatic washing machine.