Performance calibration composition for evaluating cleaning power, evaluation carrier, and evaluation method

Abstract

This invention relates to the field of testing methods, providing a performance calibration composition, evaluation carrier, and testing method for evaluating cleaning power. The performance calibration composition for evaluating cleaning power comprises, by mass percentage: 10-25% tallow, 40-55% lard, 20-35% soybean oil, 3-8% color indicator, and 1-3% thickener. This invention, through the specific formulation and synergistic effect of the composition, yields a solid grease that facilitates uniform coating during the application process, thereby enabling more accurate test results when evaluating the cleaning performance of dishwashers or detergents on heavy oil stains, especially contaminants such as hot pot oil.

Description

Technical Field

[0001] This invention relates to the field of testing methods, and in particular to performance calibration compositions, evaluation carriers, and evaluation methods for evaluating cleaning power. Background Technology

[0002] Heavy oil stains, such as those from hot pot, are a significant characteristic of Chinese cuisine. They possess unique composition and physicochemical properties, and under high temperatures, they undergo oxidation, forming a sticky grime that adheres to the surface of tableware. This stain is not only difficult to remove but also prone to producing unpleasant odors, negatively impacting the user experience. Especially in dishwashers with lower washing temperatures, heavy oil stains are more likely to remain on the tableware surface and filter, resulting in incomplete cleaning. Therefore, research into effective cleaning methods for this type of oil stain is of great importance.

[0003] To objectively evaluate the cleaning performance of dishwashers or detergents on the aforementioned oil stains, some have proposed using traditional butter or hot pot broth as performance-calibrating contaminants. These are applied to specific carriers (such as plates and bowls) to simulate the soiling of everyday tableware. After repeated washing, the cleaning level is assessed by observing or measuring the amount of contaminant residue on the carrier. However, using traditional butter as an evaluation contaminant can lead to difficulties in observing thin layers of residue after washing, limiting the accuracy of the evaluation results. Using hot pot broth, with its high solid content, hinders uniform coating and makes it difficult to avoid random peeling during the washing process, rather than the dissolution or emulsification peeling that truly reflects the detergent's cleaning power, also limiting accuracy. Summary of the Invention

[0004] Studies have found that when solid oil obtained by filtering hot pot oil, which uses butter as the main oil, is used for calibration, it is actually difficult to achieve uniform coating. For example, during the coating process, solid oil is often heated and then coated on the carrier using tools such as brushes. For heavy oil stains, multiple coatings are usually required. If the curing rate of the oil is too slow at room temperature (usually 25°C), the oil will aggregate due to surface tension and gravity before it is fully cured, resulting in lumps after curing. If the curing rate of the oil is too fast at room temperature, it is not conducive to spreading the oil and is also not conducive to uniform coating.

[0005] Therefore, this invention proposes a performance calibration composition for evaluating cleaning power. By combining the compositions in a specific formulation, a solid grease that is easy to coat evenly during the coating process is obtained, which in turn facilitates obtaining more accurate test results when evaluating the cleaning performance of dishwashers or detergents on heavy oil stains, especially contaminants such as hot pot oil.

[0006] Specifically, the present invention provides a performance calibration composition for evaluating cleaning power, comprising, by weight percentage: Butter 10-25%; 40-55% lard; Soybean oil 20-35%; Color indicator 3-8%; Thickener 1-3%.

[0007] According to the performance calibration composition for evaluating cleaning power provided by the present invention, the viscosity of the performance calibration composition at 55°C is 100~500 mPa·s.

[0008] According to the performance calibration composition for evaluating cleaning power provided by the present invention, the melting point of the performance calibration composition is 40~50°C.

[0009] According to the performance calibration composition for evaluating cleaning power provided by the present invention, the thickener is a nonionic surfactant with an HLB of 3 to 4, preferably a triglyceride. By forming a liquid crystal phase in the molten state through triglycerides, the melting point is not significantly increased, and orderly crystallization is guided during cooling, thus stabilizing the solidification morphology.

[0010] According to the performance calibration composition for evaluating cleaning power provided by the present invention, the mass ratio of the butter and the lard is 1:1.6 to 5.5, preferably 1:2.0 to 3.0; and / or, the mass ratio of the butter and the soybean oil is 1:0.8 to 3.5, preferably 1:1.0 to 2.0.

[0011] The present invention also proposes a method for preparing the performance calibration composition for evaluating cleaning power as described above, wherein the components are mixed evenly.

[0012] This invention also proposes a testing carrier for evaluating cleaning power, comprising: The performance calibration composition heated to 40-55℃ was coated onto the substrate and allowed to stand for 0-24 hours to obtain the evaluation carrier. The performance calibration composition is the performance calibration composition used to evaluate cleaning power as described above, or the performance calibration composition prepared by the method described above.

[0013] According to the evaluation carrier for assessing cleaning power provided by the present invention, the coating amount of the performance calibration composition is 0.003~0.013 g / cm³. 2 The stained area is 100cm² 2 above.

[0014] According to the evaluation carrier for evaluating cleaning power provided by the present invention, the substrate is made of one or more of ceramic, stainless steel, and melamine.

[0015] The present invention also proposes a method for evaluating cleaning power, comprising: placing a test carrier in a washing device, and washing the carrier according to the washing degree of the washing device under the action of a detergent composition; wherein the test carrier is selected from the test carriers described above.

[0016] According to the evaluation method for cleaning power provided by the present invention, the substrate is one or more of bowls, plates, and pots; preferably, the performance calibration composition is coated on the inner surface of the substrate.

[0017] According to the evaluation method for evaluating cleaning power provided by the present invention, the evaluation method is used to evaluate the cleaning power of washing equipment, detergent composition, or washing system mainly composed of the two.

[0018] The present invention provides a performance calibration composition, evaluation carrier, and evaluation method for evaluating cleaning power. Through the combination of compositions with specific formulations, a solid grease that is easy to coat evenly during the coating process is obtained, which in turn facilitates obtaining more accurate test results when evaluating the cleaning performance of dishwashers or detergents on heavy oil stains, especially contaminants such as hot pot oil.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the appearance of the evaluation carrier prepared in Embodiment 1 of the present invention.

[0022] Figure 2 This is a schematic diagram of the appearance of the evaluation carrier prepared in Comparative Example 1 of the present invention.

[0023] Figure 3 This is a schematic diagram of the appearance of the evaluation carrier prepared in Embodiment 5 of the present invention.

[0024] Figure 4 This is a schematic diagram of the appearance of the evaluation carrier prepared in Embodiment 6 of the present invention.

[0025] Figure 5 This is a schematic diagram of the appearance of the evaluation carrier prepared in Embodiment 7 of the present invention.

[0026] Figure 6 This is a schematic diagram of the appearance of the evaluation carrier prepared in Embodiment 8 of the present invention.

[0027] Figure 7 This is a schematic diagram of the appearance of the evaluation carrier prepared in Comparative Example 2 of the present invention.

[0028] Figure 8 This is a schematic diagram of the appearance of the evaluation carrier prepared in Comparative Example 3 of the present invention.

[0029] Figure 9 This is a schematic diagram of the appearance of the evaluation carrier prepared in Embodiment 9 of the present invention.

[0030] Figure 10 This is a schematic diagram showing the placement of the stainless steel bowl in Test Example 1 of the present invention.

[0031] Figure 11 This is a schematic diagram showing the placement of the ceramic disk and melamine disk in Test Example 1 of the present invention. Detailed Implementation

[0032] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] In a specific embodiment of the present invention, a performance calibration composition for evaluating cleaning power is first provided, comprising, by weight percentage: Butter 10-25%; 40-55% lard; Soybean oil 20-35%; Color indicator 3-8%; Thickener 1-3%.

[0035] A performance calibration composition is a standardized substance or material mixture with known components and properties. Its primary use is as a reference standard for calibrating measuring instruments, validating analytical methods, or evaluating the performance of new materials / products. In this invention, the performance calibration composition used to evaluate cleaning power not only needs to consider the stability required of a standardized substance or material, as mentioned above, but also needs to focus on its uniformity during the coating process, which directly affects the final cleaning power evaluation.

[0036] Experiments have shown that, based on the shortcomings of the aforementioned hot pot oil, a compound oil made from beef tallow, lard, and soybean oil can be constructed. This compound oil, with lard as the melting point framework to provide solid stability and soybean oil to regulate fluidity, can be used as the base oil. Furthermore, an appropriate amount of thickener can be added to regulate viscosity and solidification morphology and thickness uniformity. At the same time, for easy observation, an oil-soluble color indicator can be added to serve as a performance calibration composition that can simulate hot pot oil with beef tallow as the core component.

[0037] In some specific embodiments, the viscosity of the performance calibration composition at 55°C is 100~500 mPa·s.

[0038] In some specific embodiments, the melting point of the performance calibration composition is 40~50°C.

[0039] In some specific embodiments, the mass ratio of the beef tallow to the lard is 1:1.6~5.5, preferably 1:2.0~3.0; In some specific embodiments, the mass ratio of the butter to the soybean oil is 1:0.8~3.5, preferably 1:1.0~2.0.

[0040] In some specific embodiments, the melting point of the lard is 36~40℃, and the melting point of the beef tallow is 45~50℃.

[0041] In some specific embodiments, the saturated fatty acid content of the lard is 35-45%, the saturated fatty acid content of the beef tallow is 45-55%, and the unsaturated fatty acid content of the soybean oil is 75-85%.

[0042] In some specific embodiments, the thickener is a nonionic surfactant with an HLB of 3-4, preferably a triglyceride of fatty acids, which forms a liquid crystal phase when the performance calibration composition used to evaluate cleaning power is in the molten state. This phase does not significantly increase the melting point, but guides orderly crystallization and stabilizes the solidification morphology during cooling.

[0043] In some specific embodiments, the color indicator is a fat-soluble substance. Preferably, the color indicator is selected from one or more combinations of chili oil and oil-soluble food colorings. The oil-soluble food colorings include β-carotene, paprika oleoresin, etc.

[0044] The color indicator is preferably chili oil. In some specific embodiments, the concentration of capsanthin in the chili oil is greater than or equal to 500 ppm, preferably 500 to 2000 ppm.

[0045] In a specific embodiment of the present invention, a method for preparing a performance calibration composition for evaluating cleaning power as described above is also provided, wherein the components are mixed uniformly.

[0046] In a specific embodiment of the present invention, a testing carrier for evaluating cleaning power is also provided, comprising: The performance calibration composition heated to 40-55℃ was coated onto the substrate and allowed to stand for 0-24 hours to obtain the evaluation carrier. The performance calibration composition is the performance calibration composition used to evaluate cleaning power as described above, or the performance calibration composition prepared by the method described above.

[0047] In some specific embodiments, the coating amount of the performance calibration composition is 0.003~0.013 g / cm³. 2 The stained area is 100cm² 2 above; In some specific embodiments, the substrate is made of one or more of ceramic, stainless steel, and melamine.

[0048] In some specific embodiments, the adhesion thickness of the performance calibration composition on the evaluation carrier is less than or equal to 2 mm. If the thickness is too large, random peeling may occur during the cleaning process, affecting the accuracy of the evaluation.

[0049] In some specific embodiments of the present invention, the preparation method of the evaluation carrier includes the following steps: Using a bristle brush, the performance calibration composition heated to 40~55℃ is evenly applied to the inner surface and bottom of the substrate, and a cleaning strip of a certain width is left along the edge of the bowl. Then, it is aged at room temperature to obtain the evaluation carrier.

[0050] In a specific embodiment of the present invention, a method for evaluating cleaning power is also provided, comprising: placing an evaluation carrier in a washing device, and washing the carrier according to the washing degree of the washing device under the action of a detergent composition; wherein the evaluation carrier is selected from the evaluation carriers described above.

[0051] In some specific embodiments of the present invention, the washing device is a dishwasher.

[0052] In some specific embodiments of the present invention, the evaluation carrier is positioned such that the water flow direction of the washing device faces the side coated with the performance calibration composition.

[0053] In some specific embodiments of the present invention, the degree of washing includes: a total washing time of 1 to 5 hours, and a maximum temperature of less than or equal to 50°C during the main washing stage, preferably 47°C.

[0054] In some specific embodiments of the present invention, the substrate is one or more of a bowl, plate, or pot; preferably, the performance calibration composition is coated on the inner surface of the substrate.

[0055] In some specific embodiments of the present invention, the evaluation method is used to evaluate the cleaning power of a washing device, a detergent composition, or a washing system mainly composed of the two.

[0056] The performance calibration composition prepared by this invention has good stability and reproducibility, and can maintain consistent staining effect under different dishwasher models and detergent formulations, effectively and truly reflecting the cleaning power of different dishwashers and detergents. This stability and reproducibility significantly improve the repeatability and reliability of the results when measuring cleaning power under different experimental conditions, ensuring the accuracy and consistency of the measurement results.

[0057] The present invention will be described in detail below with reference to some examples in the implementation process of the invention, as follows. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in this field, or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased through legitimate channels. The sources of some raw materials are as follows: Tristearate fatty acid glycerides: Sigma-Aldrich, ≥99%. The following experiments were conducted using the same batch of products in this invention.

[0058] Lauryl alcohol: Merck, ≥98.0%. The following experiments were conducted using the same batch of products in this invention.

[0059] Brazilian carnauba wax: Aladdin, carnauba wax, 1#. The following experiments were conducted using the same batch of products in this invention.

[0060] Butter: Yunshan semi-edible butter, with a melting point in the range of 45~50℃ and a saturated fatty acid content of 50%. The present invention uses the same batch of products to conduct the following experiments.

[0061] Lard: Shuanghui edible lard, with a melting point in the range of 36~40℃ and a saturated fatty acid content of 40%. The present invention uses the same batch of products to conduct the following experiments.

[0062] Soybean oil: Jinlongyu selected soybean oil, with 80% unsaturated fatty acids. The following experiments were conducted using the same batch of products in this invention.

[0063] Chili oil: Lee Kum Kee chili oil, with a capsanthin concentration of 500 ppm. The present invention uses the same batch of products to conduct the following experiments.

[0064] Some of the test methods involved in this invention are as follows: Viscosity: The test method is as follows: the sample to be tested is tested at 55℃. The test instrument is a capillary viscometer. The parameters are set as follows: the constant temperature bath temperature must be stable at the test temperature (e.g., 50℃), and the fluctuation should be less than ±0.1℃; the capillary tube has an inner diameter of 0.8~3.0mm; the viscometer must be in a vertical position, and the mercury bulb of the thermometer should be close to the horizontal plane of the center of the capillary tube.

[0065] Example 1 This embodiment provides a performance calibration composition for evaluating cleaning power, which, by mass percentage, consists of the following components: 20% butter; 45% lard; Soybean oil 30%; Color indicator 6%; Thickener 2%.

[0066] The color indicator is chili oil.

[0067] The thickener is a triglyceride of HLB 3-4.

[0068] The resulting performance calibration composition has a viscosity of 210 mPa·s at 55°C and a melting point of 40°C.

[0069] This embodiment also provides a method for preparing the performance calibration composition for evaluating cleaning power as described above, which involves mixing the components evenly.

[0070] This embodiment also provides a testing carrier for evaluating cleaning power, including: After heating the above performance calibration composition to 40°C, it was evenly coated onto the inner surface and bottom of the substrate (stainless steel bowl) using a bristle brush, leaving a cleaning strip of a certain width along the edge of the bowl. The mixture was then left to stand at room temperature for 2 hours to obtain the evaluation carrier. The coating amount of the performance calibration composition was 0.008 g / cm³. 2 The stained area is 100cm² 2 .

[0071] Examples 2-4, Comparative Example 1 The difference from Example 1 lies in adjusting the preparation process of the evaluation carrier, so that the heating temperature of the performance calibration composition is different, as shown in the table below.

[0072] Table 1

[0073] The results above show that maintaining the oil temperature within the range of 40-55℃ can produce uniform hot pot oil stains. If the oil temperature is too high, it can easily lead to uneven stain thickness.

[0074] Examples 5-8, Comparative Examples 2-3 The difference from Example 2 lies in the adjustment of the preparation process of the evaluation carrier, making its substrate a melamine disk, and the coating amount of the performance calibration composition is different, as shown in the table below.

[0075] Table 2

[0076] The results above show that the coating amount should be controlled between 0.003 and 0.013 g / cm³. 2 Within the specified range, uniform hot pot oil stains can be prepared.

[0077] Examples 9-12 The difference from Example 8 lies in the adjustment of the preparation process of the evaluation carrier, making its substrate a ceramic disk, and the different standing time at room temperature, as shown in the table below.

[0078] Table 3

[0079] The results above show that uniform hot pot oil stains can be prepared within an aging time range of 0 to 24 hours.

[0080] Examples 13-16, Comparative Examples 4-5 The difference from Example 8 is that the ratio of tallow, lard and soybean oil in the performance calibration composition was adjusted, as shown in the table below.

[0081] Table 4

[0082] Examples 17-18 The difference from Example 8 is that the type of thickener was adjusted, and the triglycerides of tristearate were replaced with the substances shown in the table below.

[0083] Table 5

[0084] Test Example 1 The test samples were placed in a Midea RX600 dishwasher. The energy-saving wash program was selected (total washing time 4 hours, maximum temperature of 47℃ during the main wash). Four commercially available dishwasher detergents were selected, with 25g added to each. Scoring was then performed. The scoring rules for the cleanliness of the dishes are shown in Table 6, and the scoring rules for the cleanliness of the filter and the bottom of the dishwasher are shown in Table 7. The final score was the average of the scores for each dish, filter, and bottom of the dishwasher. The test samples were placed with the water flow direction of the washing machine facing the side coated with the performance calibration composition. Stainless steel bowls were placed on the upper shelf. Figure 10 As shown, the ceramic and melamine disks are placed on the lower layer, as... Figure 11 As shown.

[0085] Table 6

[0086] Table 7

[0087] The test results of the above embodiments and comparative examples are shown in the following tables. The overall score for the cleanliness of the tableware, filter, and bottom of the dishwasher is shown in Table 8, and the score for the cleanliness of the filter and bottom of the dishwasher is shown in Table 9. Table 9 shows the average score for the bottom of the dishwasher and the filter (bottom score and filter score). As an example, the test result for dishwasher detergent 1 in Example 1 is 4 (4, 4), indicating that the average score for the bottom of the dishwasher and the filter is 4 points, the bottom score is 4 points, and the filter score is 4 points.

[0088] Table 8

[0089] Table 9

[0090] The data above shows that: The oil thickness in Comparative Example 1 was uneven, making it unsuitable for evaluating cleaning power.

[0091] The evaluation carriers in Examples 5-8 can effectively differentiate the cleaning power of different dishwashing powders, and the experimental results are consistent. However, in Comparative Example 2, due to excessive and thick layers of grease, the cleaning power of all different dishwashing powders is very low, and the differences in cleaning power cannot be reflected, making it unsuitable for cleaning power testing and evaluation. In Comparative Example 3, because the dosage is too small, the cleaning power of all different dishwashing powders is very good, and almost all of them are cleaned, so the differences in cleaning power cannot be reflected, making it unsuitable for cleaning power testing and evaluation.

[0092] The test carriers prepared in Examples 9-12 were washed with different commercially available dishwashing powders. The results showed that the cleaning power of the dishwashing powders could be effectively distinguished, and the experimental results were consistent, indicating that the effect of different settling time on the effect was not significant.

[0093] The test results of Examples 13-16 and Comparative Examples 4-5 show that the ratio of tallow, lard and soybean oil in the performance calibration composition plays a key role.

[0094] Finally, it should be noted that the above embodiments are only for illustrating the present invention and not for limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A performance calibration composition for evaluating cleaning power, characterized in that, By weight percentage, it includes: Butter 10-25%; 40-55% lard; Soybean oil 20-35%; Color indicator 3-8%; Thickener 1-3%.

2. The performance calibration composition for evaluating cleaning power according to claim 1, characterized in that, The viscosity of the performance calibration composition at 55°C is 100~500 mPa·s; or, the melting point of the performance calibration composition is 40~50°C.

3. The performance calibration composition for evaluating cleaning power according to claim 1 or 2, characterized in that, The thickener is a nonionic surfactant with an HLB of 3-4, preferably a tristearate.

4. The performance calibration composition for evaluating cleaning power according to any one of claims 1 to 3, characterized in that, The mass ratio of the beef tallow to the lard is 1:1.6 to 5.5, preferably 1:2.0 to 3.0; and / or, the mass ratio of the beef tallow to the soybean oil is 1:0.8 to 3.5, preferably 1:1.0 to 2.

0.

5. A testing carrier for evaluating cleaning power, characterized in that, include: The performance calibration composition heated to 40-55℃ was coated onto the substrate and allowed to stand for 0-24 hours to obtain the evaluation carrier. The performance calibration composition is the performance calibration composition for evaluating cleaning power as described in any one of claims 1 to 4.

6. The evaluation carrier for assessing cleaning power according to claim 5, characterized in that, The coating weight of the performance calibration composition is 0.003~0.013 g / cm³. 2 The stained area is 100cm² 2 above.

7. The evaluation carrier for assessing cleaning power according to claim 5 or 6, characterized in that, The substrate is made of one or more of the following materials: ceramic, stainless steel, and melamine.

8. A method for evaluating cleaning power, characterized in that, include: The test carrier is placed in a washing device and washed according to the washing degree of the washing device under the action of the detergent composition. The evaluation carrier is selected from any one of the evaluation carriers described in claims 5 to 7.

9. The evaluation method for assessing cleaning power according to claim 8, characterized in that, The substrate is one or more of the following: bowl, plate, pot; preferably, the performance calibration composition is coated on the inner surface of the substrate.

10. The evaluation method for assessing cleaning power according to claim 8 or 9, characterized in that, The evaluation method is used to evaluate the cleaning power of washing equipment, detergent compositions, or washing systems mainly composed of the two.

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