CN108535257B - Test method for evaluating oil sticking prevention effect of detergent on fabric dish washing tool - Google Patents
Test method for evaluating oil sticking prevention effect of detergent on fabric dish washing tool Download PDFInfo
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Abstract
The invention discloses a test method for evaluating the oil sticking effect of a detergent on a fabric dish washing tool. This test method comprises the following steps: 1) firstly, mixing and stirring a detergent and water to obtain a detergent solution, and then mixing and stirring the detergent solution and oil stains to prepare a detergent solution containing the oil stains; 2) soaking the fabric dish-washing tool in detergent solution containing oil stain to make the fabric dish-washing tool absorb the oil stain; 3) and (3) putting the fabric dish-washing tool absorbing the oil stains into water for rinsing, then taking out and paving, observing the tested fabric dish-washing tool, and evaluating the oil sticking prevention effect of the detergent on the fabric dish-washing tool. The evaluation test method disclosed by the invention is simple and easy to operate, has obvious contrast effect, is visible by naked eyes, is convenient for visual display, can reflect the oil sticking prevention effect of the detergent on the fabric dish washing tool to consumers, and is convenient for the consumers to select and purchase the detergent with better use experience.
Description
Technical Field
The invention relates to a test method for evaluating the oil sticking effect of a detergent anti-fabric dish washing tool.
Background
Dishwashing is the most frequent household labor in daily life, and people always expect that dishwashing detergents can bring cleaner, easier and more convenient cleaning experience to dishwashing. However, after consumer research, even if the dishware is completely cleaned, many consumers still have the dishware cleaning experience influenced by the dish washing experience of the consumers because the dish washing tools are still adhered with greasy dirt and need to be cleaned again. Among them, the dish washing tools of fabric type, such as all-cotton terry cloth, multi-layer cotton gauze and high fiber cloth, are the most common dish washing tools, because of the porous fiber structure, the dish washing tools are easy to absorb oil stains after being used for a period of time. When dishes are washed, if the performance of the dish washing detergent is poor, oil stains eluted from the dishes are easily adhered to the dish washing tools. Therefore, whether the fabric dish-washing tools are clean or not after the dishes are washed is an important index for reflecting the performance of the dish-washing detergent. However, there is currently no standardized evaluation method.
From the chemical action mechanism, the tableware detergent utilizes the surfactant which is the main active component to emulsify and dissolve oil stains, the oil stains eluted from the dinner plate are dissolved in water, and the oil stains are prevented from adhering to a dish washing tool, so that the dish washing tool is clean after the tableware is cleaned. At present, the known characterization method of the oil stain emulsifying capacity of the surfactant mainly comprises GB/T6369-2008 & lt 2008 & gt surfactant emulsifying capacity determination-colorimetric method & gt, which comprises the steps of oscillating a certain emulsifier, oil and water to form an emulsion, standing for layering, extracting oil in an emulsion layer by using a solvent, and then determining the optical density value of an extraction liquid so as to calculate the emulsifying capacity. Meanwhile, some detergent manufacturers have reported that the greasy dirt emulsifying performance of detergents is compared by adding a certain amount of greasy dirt to a detergent solution, emulsifying the solution sufficiently, and then measuring the Zeta potential value of the emulsion or visually observing the appearance of the emulsion. However, the methods have the problems that the reagents are not easy to obtain, part of the reagents have safety risks, instruments and equipment are required, the method is complex to operate, the result is not visual, and the methods are not suitable for display. Therefore, none of the above methods is suitable for visually showing the performance of the dish detergent to the consumer in the market when the salesperson shows the performance of the dish detergent.
Disclosure of Invention
The invention aims to solve the problems that the existing method is complex in operation, the result is not visual, the existing method is not suitable for displaying and the like, and further provides a test method for evaluating the oil sticking effect of the detergent anti-fabric dish-washing tool.
The technical scheme adopted by the invention is as follows:
a test method for evaluating the oil sticking effect of a detergent anti-fabric dish washing tool comprises the following steps:
1) firstly, mixing and stirring a detergent and water to obtain a detergent solution, and then mixing and stirring the detergent solution and oil stains to prepare a detergent solution containing the oil stains;
2) soaking the fabric dish-washing tool in detergent solution containing oil stain to make the fabric dish-washing tool absorb the oil stain;
3) and (3) putting the fabric dish-washing tool absorbing the oil stains into water for rinsing, then taking out and paving, observing the tested fabric dish-washing tool, and evaluating the oil sticking prevention effect of the detergent on the fabric dish-washing tool.
In the detergent solution in the step 1), the mass concentration of the detergent is 0.1-10%.
In the detergent solution containing the oil stains in the step 1), the concentration of the oil stains is 5 g/L-40 g/L.
In the step 1), the oil stain is animal oil and vegetable oil according to a mass ratio of 1: (0.1-10) of mixed oil stains; the oil stain also comprises oil-soluble pigment accounting for 1-50% of the mass of the mixed oil stain.
In the step 2), the soaking specifically comprises the following steps: the textile dish washing tool is put into detergent solution containing oil stain at normal temperature to be immersed and stirred for 10 to 60 seconds in a stirrer with the stirring speed of 200 to 400 r/min.
In the step 2), the bath ratio of the fabric dish washing tool to the detergent solution containing the oil stain is 1: (50-100).
In the step 3), the bath ratio of the fabric dish washing tool to water is 1: (50-100).
The textile dish-washing tool is any one or more of cotton cloth, cotton gauze, wood fiber cloth and bamboo fiber cloth.
In the step 3), observing the area of the surface of the fabric dish-washing tool stuck with oil stains after the test, and sequentially dividing the oil-sticking prevention effect of the detergent fabric dish-washing tool into A, B, C, D, E five grades from good to bad, wherein the evaluation methods at all grades are as follows:
evaluating the oil sticking rate X of the tested fabric dish washing tool, wherein the calculation formula of the oil sticking rate X is as follows:
a level: x is less than or equal to 5 percent;
b stage: x is more than 5 and less than or equal to 15 percent;
c level: 15% < X < 25%;
d stage: 25% < X < 40%;
e, grade: x is greater than 40%.
And 3) photographing and recording the tested fabric dish washing tool, performing pixelization processing on the photograph, and respectively calculating the area of the fabric dish washing tool and the area adhered with the oil stain.
The invention has the beneficial effects that:
the evaluation test method disclosed by the invention is simple to operate, obvious in comparison effect, visible in naked eyes and convenient for visual display. The effect of preventing the detergent from being stuck with oil of the fabric dish washing tool can be reflected to consumers, and the consumers can conveniently choose the detergent with better use experience.
The method comprises the following specific steps:
1) the invention directly shows that the dish cloth has different oil sticking after being soaked in the oil stain liquid containing different detergents, and compares the difference of the different detergents in the oil sticking effect of the dish washing prevention tool;
2) the evaluation method provided by the invention is closer to the actual use scene of a consumer in design, and the result is more visual. Meanwhile, instrument and equipment are not needed, the operation is simple, and the problems of complex operation steps and inconvenient display of the existing method are solved.
3) The invention utilizes different abilities of different detergents to emulsify oil stains, can visually show the difference of different detergents in the oil-sticking effect of the fabric dish washing tool through reasonable oil stain composition and detergent concentration, can distinguish the difference by naked eyes, and overcomes the problem that the result cannot be visually shown in the prior method.
Drawings
FIG. 1 is a schematic view of a washcloth soak;
FIG. 2 is a schematic illustration of a dishcloth rinse;
FIG. 3 is a graph comparing the oil stain emulsification performance of comparative samples 1-5;
FIG. 4 is a comparative graph of a washcloth before and after the test of example 1;
FIG. 5 is a comparative graph of the washcloth before and after the test of example 2;
FIG. 6 is a comparative graph of a washcloth before and after the test of example 3;
FIG. 7 is a comparative graph of the dishcloth before and after the test of example 4;
FIG. 8 is a comparative graph of a washcloth before and after the test of example 5;
FIG. 9 is a comparative graph of a washcloth before and after the test of example 6;
FIG. 10 is a comparative graph of a washcloth before and after the test of example 7;
FIG. 11 is a comparative graph of a washcloth before and after the test of example 8;
FIG. 12 is a comparative graph of a washcloth before and after the test of example 9;
FIG. 13 is a comparative graph of a washcloth before and after the test of example 10;
FIG. 14 is a comparative graph of a washcloth before and after the test of example 11;
FIG. 15 is a comparative graph of a washcloth before and after the test of example 12.
Detailed Description
A test method for evaluating the oil sticking effect of a detergent anti-fabric dish washing tool comprises the following steps:
1) firstly, mixing and stirring a detergent and water to obtain a detergent solution, and then mixing and stirring the detergent solution and oil stains to prepare a detergent solution containing the oil stains;
2) soaking the fabric dish-washing tool in detergent solution containing oil stain to make the fabric dish-washing tool absorb the oil stain;
3) and (3) putting the fabric dish-washing tool absorbing the oil stains into water for rinsing, then taking out and paving, observing the tested fabric dish-washing tool, and evaluating the oil sticking prevention effect of the detergent on the fabric dish-washing tool.
Preferably, in the detergent solution in the step 1), the mass concentration of the detergent is 0.1-10%; more preferably, in the detergent solution of step 1), the mass concentration of the detergent is 0.8% to 10%.
Preferably, in the detergent solution containing the oil stains in the step 1), the concentration of the oil stains is 5 g/L-40 g/L; more preferably, the concentration of the oil stains in the detergent solution containing the oil stains in the step 1) is 8 g/L-35 g/L; still more preferably, the concentration of the oily soil in the detergent solution containing oily soil of step 1) is 10g/L to 30 g/L.
Preferably, in the step 1), the oil stain is animal oil and vegetable oil according to a mass ratio of 1: (0.1-10) of mixed oil stains; further preferably, in the step 1), the mass ratio of the animal oil to the vegetable oil in the mixed oil stain is 1: (0.5 to 5); still further preferably, in the step 1), the mass ratio of the animal oil to the vegetable oil in the mixed oil stain is 1: (1-3). The mixed oil stain is more in line with the eating habits of Chinese consumers.
Further, in the mixed oil stain, the animal oil is preferably at least one of beef tallow and lard oil; the vegetable oil is preferably at least one of soybean oil, peanut oil, rapeseed oil, sunflower seed oil, tea seed oil, corn oil and olive oil.
Preferably, in the step 1), the oil stain also comprises an oil-soluble pigment accounting for 1-50% of the mass of the mixed oil stain; preferably, in the step 1), the oil stain also comprises an oil-soluble pigment accounting for 1-40% of the mass of the mixed oil stain; still more preferably, in the step 1), the oil stain further comprises an oil-soluble pigment accounting for 1-30% of the mass of the mixed oil stain. The oil-soluble pigment is mixed in a certain proportion, which is favorable for improving the color of the mixed oil stain and is convenient for observing the oil sticking condition of the dish washing tool.
Preferably, the oil-soluble pigment can be selected from capsanthin, pigment-containing oil products or pigment-containing sauces; pigment-containing oil such as chili oil, and pigment-containing sauce such as chili paste, bean paste, soybean paste, tomato sauce or curry paste.
Further, in the step 1), the preparation method of the oil stain comprises the following steps: mixing animal oil and vegetable oil, heating and stirring, standing and cooling, and mixing and stirring the obtained mixed oil stain and oil-soluble pigment to obtain oil stain used for testing; preferably, the heating and stirring temperature is 175-185 ℃, and the stirring time is 10-20 min.
Preferably, in the step 1), the method for mixing and stirring the detergent solution and the oil stains specifically comprises the following steps: firstly, melting oil stains in a hot water bath, and then mixing and stirring the melted oil stains with a detergent solution to obtain the detergent solution containing the oil stains; preferably, the temperature of the hot water bath is 45-80 ℃, and the operation of personnel is convenient at the temperature; the mixing and stirring are carried out in a stirrer at the rotating speed of 400 r/min-800 r/min for 1 min-3 min.
Further, in the step 1), the proportion and the composition of the detergent are conventional technology in the field; the detergent is preferably a dishwashing detergent.
Preferably, in the step 2), the soaking specifically comprises: immersing the fabric dish-washing tool in detergent solution containing oil stain at normal temperature, and stirring for 10-60 s in a stirrer with the stirring speed of 200-400 r/min.
Further, the stirring in step 1) or step 2) is preferably performed in a magnetic stirrer.
Further, in the step 2), the temperature of the detergent solution containing the oil stains used for soaking is normal temperature, preferably 20 to 25 ℃.
Preferably, in the step 2), the bath ratio of the fabric dish-washing tool to the detergent solution containing the greasy dirt is 1: (50-100).
Preferably, in the step 3), the bath ratio of the fabric dish washing tool to water is 1: (50-100).
The bath ratio in step 2) or step 3) of the test method of the invention refers to the mass ratio of the fabric dishwashing tool to the detergent solution/water containing oil stains.
Preferably, in step 3), rinsing means rinsing the fabric dishwashing tool in water; preferably, the rinsing is carried out by clamping one corner of the fabric dish washing tool by using tweezers and carrying out back swinging washing for 2-6 times in water; or stirring the textile dish-washing tool by a glass rod for 10s to 30 s.
Further, in step 3), the temperature of water used for rinsing is normal temperature, preferably 20 to 25 ℃.
Figure 1 is a schematic view of a dishcloth soak. Figure 2 is a schematic diagram of a dishcloth rinse.
Further, the fabric dish washing tool is any one or more of cotton cloth, cotton gauze, wood fiber cloth and bamboo fiber cloth.
Preferably, the fabric dishwashing implement used in the test weighs between 5g and 15 g.
Preferably, the fabric type dish washing tool is a rectangular dish washing tool; further preferably, the fabric-type dishwashing tool is a square dishwashing tool. The textile dish-washing tool is not beneficial to stirring and rinsing when being oversize, and is not beneficial to observing results by naked eyes when being undersized. Preferably, the side length of the fabric dish-washing tool is 8 cm-10 cm; more preferably, the fabric dishwashing tool has a side length of 9 cm.
Further, in the step 3), fishing out the fabric dish washing tool, laying flat and observing; preferably, for more convenient observation and evaluation, the fabric dish washing tool can be fished out, and laid flat for observation after being wrung.
Further, in the step 3), the area of the fabric dish-washing tool adhered with oil stains after the observation and test is carried out, the oil-adhering effect of the detergent fabric dish-washing tool is sequentially divided into A, B, C, D, E five grades from good to bad, and the evaluation methods at all levels are as follows:
evaluating the oil sticking rate X of the tested fabric dish washing tool, wherein the calculation formula of the oil sticking rate X is as follows:
a level: x is less than or equal to 5 percent;
b stage: x is more than 5 and less than or equal to 15 percent;
c level: 15% < X < 25%;
d stage: 25% < X < 40%;
e, grade: x is greater than 40%.
The grades A to E represent that the oil sticking efficacy of the detergent for preventing the fabric dish-washing tool is gradually reduced from good to bad, namely the grade A represents that the oil sticking efficacy of the detergent for preventing the fabric dish-washing tool is optimal, and the grade E represents that the oil sticking efficacy of the detergent for preventing the fabric dish-washing tool is worst.
The area of the fabric dish-washing tool adhered with the oil stain is observed by eye, and the larger the area is, the more the oil stain is adhered, the poorer the oil-sticking prevention effect of the detergent is; conversely, the smaller the area with the oil stains, the less the oil stains are adhered, and the better the oil-release effect of the detergent is.
The visual measurement of the area unit of the textile dish-washing tool or the greasy dirt adhered to the dish-washing tool can be cm2Or mm2And (4) showing.
Preferably, in the step 3), the tested fabric dish washing tool is photographed and recorded, the picture is subjected to pixelization, and the area of the fabric dish washing tool and the area adhered with the oil stains are respectively calculated. The pixelization processing refers to converting the fabric dish washing tool and the image layer adhered with the oil stain in the photo into corresponding pixel processing by using a computer, namely, respectively calculating the total pixel value adhered with the oil stain of the fabric dish washing tool after the test and the total pixel value of the fabric dish washing tool (the fabric dish washing tool refers to a clean fabric dish washing tool before the test). Adobe Photoshop can be selected as the computer processing software. The unit of the pixel is px.
The water used in the method of the present invention may be selected from tap water, distilled water, purified water or deionized water, preferably tap water.
The present invention will be described in further detail with reference to specific examples. Unless otherwise indicated, all reagents and methods mentioned in the examples are reagents and methods commonly used in the art.
Sample 1 preparation of oil stain
Weighing 30.00 g of lard oil, 20.00 g of beef tallow and 50.00 g of peanut oil, placing the mixed oil on an electric furnace, heating to 180 ℃, stirring for 10min at constant temperature after the mixed oil is completely melted, and then standing until the mixed oil is cooled to room temperature. Weighing 40.00 g of the mixed oil and 6.00 g of chili sauce, placing the mixture in a beaker, and stirring and mixing the mixture uniformly by using a glass rod for later use. The mixed oil stain can be stored in a refrigerator for 1 month.
Sample 2 preparation of oil stain
Weighing 50.00 g of lard oil, 25.00 g of soybean oil and 25.00 g of peanut oil, heating the mixed oil liquid on an electric furnace to 180 ℃, stirring at constant temperature for 10min after the mixed oil liquid is completely melted, and then standing until the mixed oil liquid is cooled to room temperature. Weighing 40.00 g of the mixed oil and 0.40 g of capsorubin, and placing the mixed oil and the capsorubin in a beaker to be uniformly stirred by a glass rod for later use. The mixed oil stain can be stored in a refrigerator for 3 months.
Sample 3 preparation of oil stain
Weighing 25.00 g of lard oil, 25.00 g of beef tallow and 50.00 g of peanut oil, placing the mixed oil on an electric furnace, heating to 180 ℃, stirring for 10min at constant temperature after the mixed oil is completely melted, and then standing until the mixed oil is cooled to room temperature. Weighing 40.00 g of the mixed oil and 6.00 g of curry sauce, and placing the mixed oil and the curry sauce in a beaker to be uniformly stirred by a glass rod for later use. The mixed oil stain can be stored in a refrigerator for 1 month.
Sample 4 preparation of oil stain
Weighing 25.00 g of beef tallow and 75.00 g of soybean oil, placing the mixed oil liquid on an electric furnace, heating to 180 ℃, stirring for 10min at constant temperature after the mixed oil liquid is completely melted, and then standing until the mixed oil liquid is cooled to room temperature. Weighing 40.00 g of the mixed oil, 6.00 g of chilli sauce and 6.00 g of broad bean paste, placing in a beaker, and stirring and mixing uniformly by using a glass rod for later use. The mixed oil stain can be stored in a refrigerator for 1 month.
Sample 5 preparation of oil stain
Weighing 20.00 g of lard, 20.00 g of beef tallow and 60.00 g of rapeseed oil, placing the mixed oil liquid on an electric furnace, heating to 180 ℃, stirring for 10min at constant temperature after the mixed oil liquid is completely melted, and then standing until the mixed oil liquid is cooled to room temperature. 50.00 g of the mixed oil and 0.50 g of capsorubin are weighed and placed in a beaker to be uniformly stirred by a glass rod for later use. The mixed oil stain can be stored in a refrigerator for 3 months.
The samples used in the following examples are illustrated below:
national standard detergents: the main components refer to national standard GB 9985-;
laboratory # 1 sample: the main components comprise a compound system of anionic surfactant (such as fatty alcohol ether sulfate and alkyl benzene sulfonate), zwitterionic surfactant (such as betaine) and nonionic surfactant (such as fatty alcohol ether and alkyl glycoside), a builder and edible essence;
commercial product a: the main ingredients are anionic surfactant (such as fatty alcohol ether sulfate, alkylbenzene sulfonate), rhizoma Zingiberis recens essence, and edible essence;
commercial product B: the main ingredients are anionic surfactant (such as fatty alcohol ether sulfate, alkylbenzene sulfonate), edible essence, and softened water;
commercial product C: the main ingredients comprise anionic surfactant (such as fatty alcohol ether sulfate, alkylbenzene sulfonate), alkyl glucoside (APG), builder, and edible essence.
Comparative sample 1
Weighing 4.00 g of national standard detergent, adding 500.00 ml of tap water, stirring and dissolving to prepare a detergent solution with the mass concentration of 0.8%, and then adding 5.00 g of mixed oil stain of the sample 1 preheated in a water bath at 60 ℃. On a magnetic stirrer, the rotation speed is adjusted to 600rpm, and stirring is carried out for 2 min. Then, the stirring was stopped, and after standing for 2min, the turbidity of the detergent solution was recorded by photographing.
Comparative sample 2
Weighing 4.00 g of a commercial product A, adding 500.00 ml of tap water, stirring and dissolving to prepare a detergent solution with the mass concentration of 0.8%, and adding 5.00 g of mixed oil stain of a sample 1 preheated in a water bath at 60 ℃. On a magnetic stirrer, the rotation speed is adjusted to 600rpm, and stirring is carried out for 2 min. Then, the stirring was stopped, and after standing for 2min, the turbidity of the detergent solution was recorded by photographing.
Comparative sample 3
Weighing 4.00 g of a commercial product B, adding 500.00 ml of tap water, stirring and dissolving to prepare a detergent solution with the mass concentration of 0.8%, and adding 5.00 g of mixed oil stain of the sample 1 preheated in a water bath at 60 ℃. On a magnetic stirrer, the rotation speed is adjusted to 600rpm, and stirring is carried out for 2 min. Then, the stirring was stopped, and after standing for 2min, the turbidity of the detergent solution was recorded by photographing.
Comparative sample 4
Weighing 4.00 g of a commercial product C, adding 500.00 ml of tap water, stirring and dissolving to prepare a detergent solution with the mass concentration of 0.8%, and adding 5.00 g of mixed oil stain of the sample 1 preheated in a water bath at 60 ℃. On a magnetic stirrer, the rotation speed is adjusted to 600rpm, and stirring is carried out for 2 min. Then, the stirring was stopped, and after standing for 2min, the turbidity of the detergent solution was recorded by photographing.
Comparative sample 5
Weighing 4.00 g of laboratory sample No. 1, adding 500.00 ml of tap water, stirring and dissolving to prepare a detergent solution with the mass concentration of 0.8%, and then adding 5.00 g of mixed oil stain of the sample 1 preheated in a water bath at 60 ℃. On a magnetic stirrer, the rotation speed is adjusted to 600rpn, and stirring is carried out for 2 min. Then, the stirring was stopped, and after standing for 2min, the turbidity of the detergent solution was recorded by photographing.
The better the emulsifying power of the oil stain, the more turbid the detergent solution containing the oil stain. The degree of turbidity of the solution was visually scored with reference to the following criteria. From 5 to 1 point in turn represents that the detergent solution containing the oil stain is from turbid to clear and transparent, namely the oil stain emulsifying capacity is from good to poor.
And 5, dividing: the solution is emulsion and cannot transmit light; and 4, dividing: the solution is emulsion and is slightly transparent; and 3, dividing: the solution is a slightly transparent turbid solution which is slightly transparent; and 2, dividing: the solution is a slightly transparent turbid solution which is obviously transparent; 1 minute: the solution is clear and transparent.
The results of the scores for comparative samples 1-5 are shown in Table 1. The oil stain emulsifying performance of the comparison samples 1-5 is shown in the attached figure 3.
TABLE 1 comparison of greasy dirt emulsifiability of comparative examples 1-5
| Comparative sample 1 | Comparative sample 2 | Comparative sample 3 | Comparative sample 4 | Comparative sample 5 | |
| Haze score | 3 | 2 | 2 | 3 | 5 |
Example 1
8.00 g of the national standard detergent is weighed, 500.00 ml of tap water is added, and the detergent solution with the mass concentration of 1.6% is prepared by stirring and dissolving. Then 7.00 g of the mixed oil stain of the sample 1 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.50 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Schematic views of the washcloth soaking and rinsing can be seen in fig. 1 and 2, respectively.
Example 2
Commercially available product a8.00 g was weighed, and 500.00 ml of tap water was added thereto, and dissolved by stirring to prepare a detergent solution having a mass concentration of 1.6%. Then 7.00 g of the mixed oil stain of the sample 1 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 3
Commercially available product B8.00 g was weighed, and 500.00 ml of tap water was added thereto, and dissolved by stirring to prepare a detergent solution having a mass concentration of 1.6%. Then 7.00 g of the mixed oil stain of the sample 1 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 4
Commercially available product C8.00 g was weighed, and 500.00 ml of tap water was added thereto, and dissolved by stirring to prepare a detergent solution having a mass concentration of 1.6%. Then 7.00 g of the mixed oil stain of the sample 1 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 5
8.00 g of laboratory # 1 sample was weighed, and 500.00 ml of tap water was added thereto, followed by stirring and dissolving to prepare a detergent solution having a mass concentration of 1.6%. Then 7.00 g of the mixed oil stain of the sample 1 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 6
Laboratory sample # 1 and commercial product B8.00 g were weighed separately, and 500.00 ml of tap water was added thereto, and dissolved by stirring to prepare a detergent solution having a mass concentration of 1.6%. Then 7.00 g of the mixed oil stain of the sample 2 preheated in the water bath at 60 ℃ is added to prepare the detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 7
A laboratory sample No. 1 and 20.00 g of a commercially available product B were weighed, and 500.00 ml of tap water was added thereto and dissolved by stirring to prepare a detergent solution having a mass concentration of 4.0%. Then 7.00 g of the mixed oil stain of the sample 3 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 8
Laboratory sample # 1 and commercial product B8.00 g were weighed separately, and 500.00 ml of tap water was added thereto, and dissolved by stirring to prepare a detergent solution having a mass concentration of 1.6%. Then 7.00 g of the mixed oil stain of the sample 4 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 9
Laboratory sample # 1 and commercial product B8.00 g were weighed separately, and 500.00 ml of tap water was added thereto, and dissolved by stirring to prepare a detergent solution having a mass concentration of 1.6%. Then 7.00 g of the mixed oil stain of the sample 5 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 10
A laboratory sample No. 1 and a commercial product B50.00 g were weighed out separately, and 500.00 ml of tap water was added thereto and dissolved by stirring to prepare a detergent solution having a mass concentration of 10%. Then 15.00 g of the mixed oil stain of the sample 1 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 11
A laboratory sample No. 1 and a commercial product B50.00 g were weighed out separately, and 500.00 ml of tap water was added thereto and dissolved by stirring to prepare a detergent solution having a mass concentration of 10%. Then 10.00 g of the mixed oil stain of the sample 1 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
Example 12
A laboratory sample No. 1 and a commercial product B50.00 g were weighed out separately, and 500.00 ml of tap water was added thereto and dissolved by stirring to prepare a detergent solution having a mass concentration of 10%. Then 7.00 g of the mixed oil stain of the sample 1 which is preheated in a water bath at 60 ℃ is added to prepare a detergent solution containing the oil stain.
A commercially available white cotton yarn dishcloth (the specification is 9cm in length and 9cm in width, and the weight is 8.5 g) is respectively put into an oil stain solution containing a laboratory No. 1 sample and a national standard detergent for soaking, the cotton yarn dishcloth is taken out after being stirred for 30s and is rinsed for 2 times by 500.00 ml of tap water, the cotton yarn dishcloth is laid flat for observation, and the oil sticking condition on the surface of the dishcloth is recorded.
FIGS. 4 to 15 are comparative graphs of the dishcloths of examples 1 to 12 before and after the test, respectively. Fig. 4 to 15 refer to before the test, before the soaking in step 2), and to the test, after the flattening in step 3).
Table 2 shows the test and evaluation results of examples 1 to 5.
TABLE 2 test and evaluation results of examples 1 to 5
Table 3 shows the test and evaluation results of examples 6 and 7.
Table 3 test and evaluation results of examples 6 and 7
Table 4 shows the test and evaluation results of examples 8 and 9.
Table 4 test and evaluation results of examples 8 and 9
Table 5 shows the test and evaluation results of examples 10 and 11.
Table 5 test and evaluation results of examples 10 and 11
Table 6 shows the test and evaluation results of example 12.
Table 6 test and evaluation results of example 12
As can be seen from Table 2, the good and bad emulsifying performance of the dish washing detergent on oil stains has certain relevance with the oil sticking prevention effect of the dish cloth. But the oil stain emulsifying performance of the dish washing detergent is directly displayed, so that consumers can hardly understand how the oil stain emulsifying performance of the dish washing detergent is helpful for dish washing experience, and the result display is not visual enough. The method directly shows the oil staining condition of the dishcloth after being soaked in the oil stain solution, and the difference of different dish washing agents can be respectively seen visually, so that the result is more visual and more convenient to show.
As can be seen from tables 3-6, different dishwashing detergents, different oil stain types and different dishwashing detergent dosages can be obtained by the method, and the difference results can be seen visually. The method has wide applicable conditions and can be used for the rapid evaluation and analysis of the oil sticking prevention effect of different dish washing detergents.
Claims (9)
1. A test method for evaluating the oil sticking effect of a detergent on a fabric dish washing tool is characterized by comprising the following steps: the method comprises the following steps:
1) firstly, mixing and stirring a detergent and water to obtain a detergent solution, and then mixing and stirring the detergent solution and oil stains to prepare a detergent solution containing the oil stains;
2) soaking the fabric dish-washing tool in detergent solution containing oil stain to make the fabric dish-washing tool absorb the oil stain;
3) putting the fabric dish-washing tool adsorbing the oil stains into water for rinsing, then taking out, paving, observing the tested fabric dish-washing tool, and evaluating the oil sticking prevention effect of the detergent;
in the step 3), observing the area of the surface of the fabric dish-washing tool stuck with oil stains after the test, and sequentially dividing the oil-sticking prevention effect of the detergent fabric dish-washing tool into A, B, C, D, E five grades from good to bad, wherein the evaluation methods at all grades are as follows:
evaluating the oil sticking rate X of the tested fabric dish washing tool, wherein the calculation formula of the oil sticking rate X is as follows:
a level: x is less than or equal to 5 percent;
b stage: x is more than 5 and less than or equal to 15 percent;
c level: 15% < X < 25%;
d stage: 25% < X < 40%;
e, grade: x is greater than 40%.
2. The test method for evaluating the oil sticking efficacy of a detergent anti-fabric dishwashing tool according to claim 1, wherein: in the detergent solution in the step 1), the mass concentration of the detergent is 0.1-10%.
3. The test method for evaluating the oil sticking efficacy of a detergent anti-fabric dishwashing tool according to claim 1, wherein: in the detergent solution containing the oil stains in the step 1), the concentration of the oil stains is 5 g/L-40 g/L.
4. A test method for evaluating the oil-sticking efficacy of a detergent anti-fabric dishwashing tool according to claim 1 or 3, wherein: in the step 1), the oil stain is animal oil and vegetable oil according to a mass ratio of 1: (0.1-10) of mixed oil stains; the oil stain also comprises oil-soluble pigment accounting for 1-50% of the mass of the mixed oil stain.
5. The test method for evaluating the oil sticking efficacy of a detergent anti-fabric dishwashing tool according to claim 1, wherein: in the step 2), the soaking specifically comprises the following steps: the textile dish washing tool is put into detergent solution containing oil stain at normal temperature to be immersed and stirred for 10 to 60 seconds in a stirrer with the stirring speed of 200 to 400 r/min.
6. The test method for evaluating the oil sticking efficacy of a detergent anti-fabric dishwashing tool according to claim 5, wherein: in the step 2), the bath ratio of the fabric dish washing tool to the detergent solution containing the oil stain is 1: (50-100).
7. The test method for evaluating the oil sticking efficacy of a detergent anti-fabric dishwashing tool according to claim 1, wherein: in the step 3), the bath ratio of the fabric dish washing tool to water is 1: (50-100).
8. A test method for evaluating the oil-sticking efficacy of a detergent anti-fabric dishwashing tool according to claim 6 or 7, wherein: the textile dish-washing tool is any one or more of cotton cloth, cotton gauze, wood fiber cloth and bamboo fiber cloth.
9. The test method for evaluating the oil sticking efficacy of a detergent anti-fabric dishwashing tool according to claim 1, wherein: and 3) photographing and recording the tested fabric dish washing tool, performing pixelization processing on the photograph, and respectively calculating the area of the fabric dish washing tool and the area adhered with the oil stain.
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