JPH0647680B2 - Rinse aid - Google Patents

Description

TECHNICAL FIELD The present invention relates to a composition suitable for use as a rinse aid in an automatic dishwasher or a crate washer.

[Conventional technology and problems] Most of the washing of dishes and crates with an automatic dishwasher or crate washer, the washing process by spraying an aqueous alkaline detergent solution, a rinse aid aqueous solution heated to 80 ° C to 90 ° C It consists of a spray rinsing and drying process.

The feature that the rinse aid used here should have is that it does not leave water spots or stains on the surface of the tableware or crate after drying, and the water droplets adhering to the surface of the tableware or crate after the rinsing process quickly disappears by drying. Having a performance as a so-called drying accelerator is that it has high safety such that even if a small amount of the rinse aid composition remains on the surface of tableware or a crate, it does not affect the human body. As a rinse aid, Pluronic,
It is known to use surfactants of sucrose fatty acid ester, glycerin fatty acid ester, sorbitan fatty acid ester, propylene glycol fatty acid ester and polyglycerin fatty acid ester, but water spots and stains remain on the tableware after drying, or water drops Forever,
At present, the problem that drying takes time is still unsolved.

In particular, glass cups are transparent because the dishes are transparent.
Water spots and stains are conspicuous, spoiling aesthetics,
In busy restaurants such as family restaurants, it is necessary to quickly organize the dishes after washing work into the cupboard, but since they are not completely dry, they must be stored in a wet state, which is hygienic. Is also a concern. on the other hand,
In the crate cleaning, in order to dry quickly,
At present, a huge amount of heat energy is consumed, such as blowing hot air.

The present inventors have completed the present invention as a result of various studies to eliminate the drawbacks of the rinse aids currently used.

A first object of the present invention is to provide a rinse aid which does not leave water spots or stains on the surface of tableware or crate after drying.

A second object of the present invention is to provide a rinse aid which has an effect of promptly eliminating water droplets adhering to the surface of tableware or the crate after the rinse step.

A third object of the present invention is to provide a highly safe rinsing aid that does not affect the human body even if a small amount of rinsing aid remains on the surfaces of dishes and crates.

[Means for solving problems]

The rinse aid of the present invention is characterized by containing polyoxyethylene sorbitan fatty acid ester, glycerin and / or sugar alcohol, and water as essential components.

The polyoxyethylene sorbitan fatty acid ester, which is an essential component of the rinse aid of the present invention, includes fatty acid esters of polyoxyethylene sorbide and polyoxyethylene sorbitol. In general, commercially available polyoxyethylene sorbitan fatty acid ester may contain sorbide or sorbitol in addition to sorbitan depending on the production method. Further, as the polyoxyethylene sorbitan fatty acid ester, any of monoester, diester, triester, tetraester and the like can be used, and if the ethylene oxide is 1 mol or more, there is no particular limitation on how many moles are added, but the rinsing aid is not limited. It is preferable that the HLB as a polyoxyethylene sorbitan fatty acid ester is in the range of 6 to 16 to exhibit the performance as an agent. HL
If B is less than 6 or more than 16, water spots and stains tend to adhere to the dishes. Examples of polyoxyethylene sorbitan fatty acid ester in the range of HLB 6 to 16 include polyoxyethylene sorbitan monolaurate (4 mol EO) HLB 13.3, polyoxyethylene sorbitan monooleate (20 mol EO) HLB 15, polyoxyethylene Ethylene sorbitan monopalmitate (20 mol EO) HLB 15.6, polyoxyethylene sorbitan tristearate (4 mol
EO) HLB 10.5 and polyoxyethylene sorbitan trioleate (4 mol EO) HLB 11.0. Regarding polyoxyethylene sorbitan monostearate, the number of moles of ethylene oxide added from 1 mole to 25 moles falls within the range of HLB 6 to 16, and within this range,
It has excellent performance as a rinse aid. On the other hand, polyoxyethylene sorbitan fatty acid ester with a high HLB within the above range is suitable for glass tableware where the object to be washed is hydrophilic, and the above range for relatively lipophilic tableware such as polypropylene, melamine resin, and polyethylene. Among them, polyoxyethylene sorbitan fatty acid ester having a low HLB is suitable.

Further, glycerin and / or sugar alcohol, which is another essential component of the present invention, functions as a solubilizing agent for keeping the aqueous surfactant solution stable for a long period of time, and is required to have excellent solubilizing power and high safety. Examples thereof include glycerin, sorbit, mannitol, xylit, and the like, and it is particularly preferable to use glycerin, sorbit, or a mixture thereof.

Further, water, which is another essential component of the rinse aid of the present invention, is necessary when diluting the rinse aid to the working concentration. That is,
The rinse aid which does not contain water becomes non-uniform oil droplets when diluted, and the effect expected as the rinse aid cannot be obtained. Moreover, the product cost is reduced by containing water,
It goes without saying that the product cost can be set to be easily accepted by users.

The particularly preferred ranges of the rinse aid of the present invention are shown below.

The rinsing aid of the present invention, if necessary, sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, surfactants such as sucrose fatty acid ester, sodium citrate, sodium gluconate, It goes without saying that a chelating agent such as sodium malate and sodium ethylenediaminetetraacetate may be contained.

[Examples] The present invention is described below with reference to examples, but the present invention is not limited to these examples.

Examples 1 to 6 and Comparative Examples 1 to 4 Using an automatic dishwasher, glass cups and melamine dishes were washed with an alkaline detergent, and the compositions shown in Examples and Comparative Examples (surfactant 20 wt%) were obtained. 1/20000 rinse aid
After rinsing with hot water diluted to 80 ° C., the drying speed of the tableware, the water spot remaining on the tableware after drying, and the stain were evaluated.

Washing machine: IHI-JWD 6 type cleaning agent; ADEKA CLEAN ADE, Washmate S
(0.2%) Rinse aid; described in the table Evaluation method: 8 glass cups and 8 melamine dishes were washed, and the water spot, the average number of stains adhered, and the average time until complete drying were measured.

Claims (3)

[Claims] 1. A rinsing aid characterized by containing polyoxyethylene sorbitan fatty acid ester, glycerin and / or sugar alcohol and water as essential components. 2. The rinsing aid according to claim 1, wherein the HLB of the polyoxyethylene sorbitan fatty acid ester is in the range of 6 to 16. 3. The rinsing aid according to claim 1 or 2, wherein the sugar alcohol is sorbit.