CN114686319B

CN114686319B - Stable and efficient machine bowl washing agent

Info

Publication number: CN114686319B
Application number: CN202210348742.8A
Authority: CN
Inventors: 李荣杰; 谭小军; 李智
Original assignee: Whealthfields Guangzhou Co ltd
Current assignee: Whealthfields Guangzhou Co ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2023-07-14
Anticipated expiration: 2042-04-01
Also published as: CN114686319A

Abstract

The invention relates to a stable and efficient machine dishwashing agent, and relates to the technical field of detergents. The stable and efficient machine dishwashing agent takes a polyethylene-vinyl alcohol water-soluble film as a carrier, and a cavity A, a cavity B and a cavity C are arranged in the carrier; the component A in the cavity A comprises the following components in percentage by mass: 1-5% of anhydrous sodium metasilicate, 15-30% of sodium percarbonate and 100% of sodium carbonate; the component B in the cavity comprises: 10-20% of tetraacetyl ethylenediamine, 5-10% of ethylenediamine tetraacetic acid, 5-10% of dispersing agent and 100% of citric acid; the C intracavity component C comprises: 3-6% of propylene glycol, 1-3% of water, 2-5% of enzyme preparation and 100% of surfactant; the component A comprises the following components: component B: the mass ratio of the component C is 10: (2-5): (1-4). The stable and efficient machine dishwashing agent takes the water-soluble film as a carrier to coat each component in the cavity, so that the forming auxiliary agent is reduced; the components are prevented from reacting with each other, the shelf life is prolonged, the washing performance of the product is improved, and good washing and sterilizing effects can be obtained with small dosage.

Description

Stable and efficient machine bowl washing agent

Technical Field

The invention relates to the technical field of detergents, in particular to a stable and efficient machine bowl washing agent.

Background

With the popularity of dishwashers in ordinary households, machine dishwashing cleaners are also now available at various venues and platforms. At present, the machine dishwashing agents with better washing effect on the market mainly comprise dishwashing powder or dishwashing blocks and the like; wherein, the main components of the dish washing powder and dish washing block which play a role in cleaning comprise alkaline hydroxide or salt for maintaining high pH, chelating agent for reducing water hardness, oxide for cleaning stubborn stains (generally sodium percarbonate and catalyst thereof are compounded for use), enzyme preparation aiming at regional characteristics (lipase is added aiming at heavy oil areas, amylase or cellulase is added aiming at wheaten food areas, and the like), other forming aids, anti-dirt redeposition aids, and the like.

At present, all ingredients exist in a mixed system in the market, namely the dish washing powder and the dish washing block, and the ingredients are in conflict, so that the shelf life of the product is shortened, and the effect of washing is not exerted. Wherein, the addition of the peroxide catalyst is easy to accelerate the decomposition of sodium percarbonate, and can easily cause the gas expansion of the product and reduce the use effect, and the storage of the biological enzyme preparation is not facilitated under the condition of strong alkalinity and strong oxidizing property.

The main components of the existing dish washing agents on the market are all necessary components although the main components conflict with each other. Therefore, aiming at the problems that essential components in the existing dishwashing agent are mutually conflicting, thereby shortening the shelf life of the product and reducing the washing effect, the invention provides a stable and efficient machine dishwashing agent which separates the essential components in the dishwashing agent into separate cavities, thereby not only ensuring the washing effect, but also ensuring the mutually conflicting components to be mutually separated in the storage process and improving the shelf life of the product; meanwhile, the component formula is optimized, and the washing performance of the product is improved.

Disclosure of Invention

In order to solve the technical problems, the invention provides a stable and efficient machine bowl washing agent, which takes a polyethylene-vinyl alcohol water-soluble film as a carrier to cover three cavities of a cavity A, a cavity B and a cavity C; according to the invention, the cavity is arranged on the water-soluble film, and the components are separated; the water-soluble film is adopted to change the appearance structure, so that the forming auxiliary agent is reduced; the components are optimally and separately placed, so that the mutual reaction of the components is prevented, the quality guarantee period is prolonged, and the washing performance of the product is improved; ensuring that the same washing effect can be obtained by using smaller amount of detergent in the effective period. In addition, the invention does not contain silicate, so that silicate dirt in the dish washer can be effectively prevented; meanwhile, the effect of effective sterilization can be achieved.

A stable and efficient machine dishwashing agent takes a polyethylene-vinyl alcohol water-soluble film as a carrier, wherein a cavity A, a cavity B and a cavity C are arranged in the carrier;

the component A in the cavity A comprises the following components in percentage by mass: 1-5% of anhydrous sodium metasilicate, 15-30% of sodium percarbonate and 100% of sodium carbonate;

the component B in the cavity comprises: 10-20% of tetraacetyl ethylenediamine, 5-10% of ethylenediamine tetraacetic acid, 5-10% of dispersing agent and 100% of citric acid;

the C intracavity component C comprises: 3-6% of propylene glycol, 1-3% of water, 2-5% of enzyme preparation and 100% of surfactant;

the component A comprises the following components: component B: the mass ratio of the component C is 10: (2-5): (1-4).

The component A mainly plays a role in stabilizing the pH value, wherein alkaline components are convenient for removing greasy dirt in the washing process, and sodium percarbonate has oxidizing property besides pH adjustment, and plays a role in sterilizing and promoting decomposition of food residues. In the component of the cavity B, the citric acid plays a role in chelating metal ions in water, has acidity, and can form a buffer system with three components in the cavity A, so that the pH value in the dishwashing agent in the washing process is stably controlled within a certain range; the tetra-acetyl ethylenediamine can promote the decomposition of sodium percarbonate, accelerate the release of hydrogen peroxide during washing and accelerate the washing process; the dispersing agent can uniformly disperse the bowl washing agent during washing, so that the washing effect is improved; ethylenediamine tetraacetic acid can act as a chelating agent to remove metal ions. The surfactant, water and propylene glycol in the cavity C can improve the hydrophilicity and lipophilicity of the dish washing agent for the lifter, and can be combined with oil dirt on tableware such as bowls and chopsticks during use, so that a better washing effect is realized; the enzyme preparation can be used as chelating agent to remove metal ions in dirt.

Preferably, the polyethylene-vinyl alcohol water-soluble film is prepared by adding ethylene during polymerization of polyvinyl alcohol; the mass ratio of the polyvinyl alcohol to the ethylene is 10: (1-2), polymerization conditions: the reaction temperature is 100-300 ℃, and the catalyst is NaOH and the pressure is normal.

Preferably, the mass ratio of the polyvinyl alcohol to the ethylene is 10:1.5.

preferably, the thickness of the polyethylene-vinyl alcohol water-soluble film is 7 μm or more.

Preferably, the dispersing agent is selected from one of sodium acrylate and acrylamide copolymer and sodium polyacrylate.

Preferably, the surfactant is selected from one of fatty alcohol alkoxy compound, EO/PO block polyether and ethoxylated fatty acid methyl ester.

Preferably, the enzyme preparation is selected from one or more of alkaline protease, amylase, lipase and cellulase.

Preferably, the pH value in the cavity C is 6-8.

Preferably, the a-cavity component a comprises, in mass fraction: anhydrous sodium metasilicate 2%, sodium percarbonate 18%, sodium carbonate up to 100%;

the component B in the cavity comprises: 12% of tetraacetyl ethylenediamine, 6% of ethylenediamine tetraacetic acid, 6% of dispersing agent and 100% of citric acid;

the C intracavity component C comprises: propylene glycol 4%, water 1%, papain 3%, fatty alcohol alkoxylate to 100%;

the component A comprises the following components: component B: the mass ratio of the component C is 10:3:2.

preferably, the a-cavity component a comprises, in mass fraction: 3% of anhydrous sodium metasilicate, 22% of sodium percarbonate and 100% of sodium carbonate;

the component B in the cavity comprises: 15% of tetraacetyl ethylenediamine, 7% of ethylenediamine tetraacetic acid, 7% of dispersing agent and 100% of citric acid;

the C intracavity component C comprises: propylene glycol 4%, water 2%, papain 3%, fatty alcohol alkoxylate to 100%;

the beneficial effects are that:

(1) The invention takes the polyethylene-vinyl alcohol water-soluble film as a carrier, which is different from the existing polyvinyl alcohol water-soluble film in the market; the polyethylene-vinyl alcohol water-soluble film is made by adding ethylene during the polymerization of polyvinyl alcohol, and is a water-soluble film which has alkali resistance and can be completely biodegraded.

(2) According to the invention, through the optimization of the formula, the water-soluble film is used as a carrier to wrap, divide and isolate different components in the formula, and each effective component is respectively put into different cavities, so that the forming auxiliary agent in the formula is reduced, the mutual reaction between the components is prevented, the quality guarantee period of the product is prolonged, and the washing performance of the product is improved; during the effective period, the same washing effect can be obtained by using less dosage of the detergent.

(3) The invention does not contain silicate, so that silicate dirt in the dish washer can be effectively prevented; meanwhile, the effect of effective sterilization can be achieved.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a graph comparing the effective oxygen reduction rate of sodium percarbonate in a machine dishwashing agent of the present invention.

Detailed Description

In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further described and illustrated with reference to specific embodiments.

All percentages, fractions and ratios are calculated on the total mass of the composition of the invention, unless otherwise indicated. All of the mass of the ingredients listed, unless otherwise indicated, are given to the active substance content and therefore they do not include solvents or by-products that may be included in commercially available materials. The term "mass percent" herein may be represented by the symbol "%".

All molecular weights herein are weight average molecular weights expressed in daltons, unless indicated otherwise.

All formulations and tests herein take place in an environment of 25 ℃, unless otherwise indicated.

The terms "comprising," "including," "containing," "having," or other variations thereof herein are intended to cover a non-closed inclusion, without distinguishing between them. The term "comprising" means that other steps and ingredients may be added that do not affect the end result. The term "comprising" also includes the terms "consisting of …" and "consisting essentially of …". The compositions and methods/processes of the present invention comprise, consist of, and consist essentially of the essential elements and limitations described herein, as well as additional or optional ingredients, components, steps, or limitations of any of the embodiments described herein. The terms "efficacy," "performance," "effect," "efficacy" are not differentiated herein.

The invention improves the formula and the appearance of the dish washing agent, reduces unnecessary components, separates conflicting components, prevents the components from reacting, prolongs the shelf life (generally for two years), and improves the washing effect.

The invention adopts a polyethylene-vinyl alcohol water-soluble film as a carrier, and the polyethylene-vinyl alcohol water-soluble film is obtained by adding ethylene during the polymerization of polyvinyl alcohol; in polymerization, the mass ratio of polyvinyl alcohol to ethylene is 10:1-2.

The polyethylene-vinyl alcohol water-soluble film is alkali-resistant and completely biodegradable, and concretely, the thickness of the polyethylene-vinyl alcohol water-soluble film is more than 7 mu m, and no sand holes exist.

The polyethylene-vinyl alcohol water-soluble film is used as a carrier to package the effective components of the dish washing agent, so that the molding auxiliary agent is reduced, the dish washing agent is convenient to use, and the dish washing agent can be used once and once without controlling the use amount.

In addition, the invention also improves the formula composition of the dish washing agent, scientifically distributes the components, prevents the components from reacting with each other, prolongs the shelf life, improves the washing performance of the product, and can obtain the same washing effect by using smaller amount of the washing agent.

In addition, the machine dishwashing agent of the invention does not contain silicate, so that silicate dirt in the dishwasher can be effectively prevented; meanwhile, the effect of effective sterilization can be achieved.

The effective components of the dish washing agent are divided into three cavities (a plurality of cavities are divided, so that the reaction of the components is prevented from being caused by mutual contact, and no special requirement is imposed on the distance between the cavities). Wherein, the two cavities are powder, and sodium percarbonate and its catalyst (generally tetra acetyl ethylenediamine) are respectively packaged in different cavities.

The stable and efficient machine dishwashing agent takes a polyethylene-vinyl alcohol water-soluble film as a carrier, the film thickness is more than 7 mu m, and no sand holes exist; the polyethylene-vinyl alcohol water-soluble film is prepared by adding ethylene into polyvinyl alcohol during polymerization; the mass ratio of the polyvinyl alcohol to the ethylene is 10: (1-2); the polymerization conditions are specifically as follows: the reaction temperature is controlled between 100 ℃ and 300 ℃, naOH is used as a catalyst, and the reaction is carried out under normal pressure.

The carrier is internally provided with an A cavity, a B cavity and a C cavity, and the mass fraction of the carrier is as follows:

the A cavity component A comprises: 1 to 5 percent of anhydrous sodium metasilicate, 15 to 30 percent of sodium percarbonate and 100 percent of sodium carbonate.

The component A mainly plays a role in stabilizing the pH value, wherein alkaline components are convenient for removing greasy dirt in the washing process, and sodium percarbonate has oxidizing property besides pH adjustment and plays a role in sterilizing and promoting decomposition of food residues.

The component B in the cavity comprises: 10-20% of tetraacetyl ethylenediamine, 5-10% of ethylenediamine tetraacetic acid, 5-10% of dispersing agent and 100% of citric acid. The dispersing agent can be sodium polyacrylate or other dispersing agents with equivalent effects. Specifically, the dispersing agent is selected from one of sodium acrylate and acrylamide copolymer and sodium polyacrylate.

In the component B, the citric acid plays a role in chelating metal ions in water, has acidity, and can form a buffer system with three components in the cavity A, so that the pH value of water in the dish washing agent in the washing process is stably controlled within a certain range. If citric acid is in contact with the components in the A cavity and reacts easily, one of the products is water, which tends to cause instability of the system. Tetra acetyl ethylene diamine can promote the decomposition of sodium percarbonate, accelerate the release of hydrogen peroxide during washing and accelerate the washing process, but when being mixed together, can promote the decomposition of sodium percarbonate and produce water, and can cause poor appearance of products and lower the performance of the products.

The C intracavity component C comprises: 3 to 6 percent of propylene glycol, 1 to 3 percent of water, 2 to 5 percent of enzyme preparation and 100 percent of surfactant. The surfactant is selected from one of fatty alcohol alkoxy compound, EO/PO block polyether and ethoxylated fatty acid methyl ester, and the cloud point is lower than 45 ℃. The enzyme preparation is selected from one or more of alkaline protease, amylase, lipase and cellulase. The pH of component C is 6-8.

The pH value of the component C is slightly acidic to neutral, and the biological enzyme preparation is also added into the cavity to prevent the component C from being damaged by strong alkaline and strong oxidizing substances.

Specifically, when the dishwashing agent is made into blocks and beads, the component A: component B: the mass ratio of the component C is 10: (2-5): (1-4); the whole bowl washing agent is controlled between 8g and 20 g.

As shown in fig. 1, the effective oxygen reduction rate of pure sodium percarbonate is closely related to the time period of the placement, and also related to the presence or absence of a catalyst, and the effective oxygen reduction rate of pure sodium percarbonate is about 4% when the pure sodium percarbonate is placed at 37 ℃ for 4 weeks; the effective oxygen reduction rate of sodium percarbonate containing a catalyst TAED (tetraacetylethylene diamine) is about 11% when the sodium percarbonate is placed for 4 weeks at 37 ℃, namely the catalyst can accelerate the decomposition speed of the sodium percarbonate, so that the effective oxygen content is reduced, and the performance of the sodium percarbonate is obviously reduced; thus, sodium percarbonate needs to be placed separately from the catalyst. The structure design of the separated placement can prolong the shelf life of the product; less detergent is needed to be used in the effective period on the premise of obtaining the same washing effect.

Method for testing performance of dish washing agent

Stability: the effective components or the use effect of the sample are stable and effective. The unstable oxidation-reduction substance (sodium percarbonate) is taken as a main active ingredient, the reduction rate of the main active ingredient content in the effective period is not higher than 30%, the total content is not lower than the related product standard, the reduction rate of other effective ingredients is not higher than 10%, the stability of the dish washing agent in the effective period is judged, and otherwise, the instability of the dish washing agent in a certain time is judged.

Validity period: the stability of the dishwashing agent can be ensured under the specified conditions.

Acceleration test: the method is to accelerate the change of various indexes of the dish washing agent by heating, humidifying or improving the illumination intensity and the like so as to shorten the observation test time. The dishwashing agent is given its shelf life according to the storage conditions and time, as shown in table 1 below.

Table 1 prediction of pot life under storage conditions for dishwashing agents

Method for testing sterilization performance

The effective components of the sample or the sterilization and disinfection effect can be tested according to the requirements in the disinfection technical specification (2002) or other relevant standard and literature methods.

Water solubility test of Water-soluble film

Under the specified conditions, the fixed water-soluble film is put into water for dissolution, and the dissolution performance of the film in water is judged by observing the time required for complete dissolution of the film.

Wherein the onset of dissolution time is the time from the onset of the test to the onset of rupture of the film sample. The complete dissolution time is the time from the start of the test until the film sample is completely dissolved in water.

The specific measurement steps are as follows:

(1) Sample preparation.

The film sample to be tested was cut into 37x37mm sized sample blocks using a hard template.

(3) Placing the cut film sample into a film fixing clamp, and fixing two sides of the clamp by using crocodile clamps;

(4) Adding 500ml of deionized water at 10 ℃ and a magnetic rotor into a beaker, and placing the mixture on a magnetic stirrer; adjusting the speed of the magnetic stirrer until water forms vortex, and enabling the height of the water vortex to be about 1/5 of the height of the water;

(5) Hanging a film fixing clamp on the beaker, and vertically placing the film fixing clamp into water, so that a film sample is positioned at a water vortex position after the water is fixedly clamped, and the upper end of the fixing clamp is about 6cm away from the water surface;

(6) After the sample was immersed in water, timing was started and the dissolution of the film sample was observed. When the film sample began to crack, the time at this time was recorded as the "film onset dissolution time"; when the film completely dissolved and disappeared, the time at this time was recorded as "film complete dissolution time"; the difference between the "film complete dissolution time" and the "film start dissolution time" is the film dissolution time.

The relative error of the results of two successive determinations of the same sample should be no more than 5% of the average; the temperature of water should be monitored at any time during the test and controlled between 10-12 ℃, and if the temperature is higher than 12 ℃, the water should be retested.

1. Preparation of machine dishwashing agents of examples 1-4 and comparative examples 1-4

The same polyethylene-vinyl alcohol water-soluble film is used as a carrier, and a cavity A, a cavity B and a cavity C are arranged in the carrier; the components in the A, B and C chambers are shown in Table 2, and the machine dishwashing agents of examples 1-4 and comparative examples 1-4 were prepared. Wherein component A: component B: the mass ratio of the component C is 10:3:2, the polyethylene-vinyl alcohol water-soluble film is prepared by adding ethylene into polyvinyl alcohol during polymerization, and the mass ratio of the polyvinyl alcohol to the ethylene is 10:1.5.

table 2 table of formulations of machine dishwashing agents of examples 1-4 and comparative examples 1-4

2. Preparation of machine dishwashing agents of comparative examples 5-12

The machine dishwashing agents of comparative examples 5-12 were carried on the same polyethylene-vinyl alcohol water-soluble film as described above, with a receiving cavity provided in the carrier.

The machine dishwashing agent of comparative example 5 was prepared by mixing all the components of example 1 and placing them in a holding chamber.

The machine dishwashing agent of comparative example 6 was prepared by mixing all of the ingredients of example 2 and placing them in a holding chamber.

The machine dishwashing agent of comparative example 7 was prepared by mixing all of the ingredients of example 3 and placing them in a holding chamber.

The machine dishwashing agent of comparative example 8 was prepared by mixing all of the ingredients of example 4 and placing them in a holding chamber.

The machine dishwashing agent of comparative example 9 was prepared by mixing all the components of comparative example 1 and placing them in a holding chamber.

The machine dishwashing agent of comparative example 10 was prepared by mixing all of the ingredients of comparative example 2 and placing them in a holding chamber.

The machine dishwashing agent of comparative example 11 was prepared by mixing all of the ingredients of comparative example 3 and placing them in a holding chamber.

The machine dishwashing agent of comparative example 12 was prepared by mixing all of the ingredients of comparative example 4 and placing them in a holding chamber.

3. Preparation of machine dishwashing agents of comparative examples 13-15

The machine dishwashing agents of comparative examples 13-15 were carried on the same polyethylene-vinyl alcohol water-soluble film described above, with two holding chambers disposed in the carrier.

The machine dishwashing agent of comparative example 13 was prepared by mixing component a and component B of example 3 and placing in one of the holding chambers, and placing component C of example 3 in the other holding chamber.

The machine dishwashing agent of comparative example 14 was prepared by mixing component B of example 3 with component C and placing in one of the holding chambers, and placing component a of example 3 in the other holding chamber.

The machine dishwashing agent of comparative example 15 was prepared by mixing component a of example 3 with component C and placing in one of the holding chambers, and placing component B of example 3 in the other holding chamber.

The machine dishwashing agents of examples 1 to 4 and comparative examples 1 to 15 were subjected to a shelf life acceleration test (stored at 37.+ -. 2 ℃ for 90 days), and the rate of decrease in the sodium percarbonate content of the main active ingredient before and after the test was detected to determine whether the machine dishwashing agents of examples 1 to 4 and comparative examples 1 to 15 could have a shelf life of 24 months (the rate of decrease in the sodium percarbonate content was not higher than 30% was achievable). The test results are shown in Table 3.

TABLE 3 24 month expiration date test results for examples 1-4 and comparative examples 1-15

Test number	Test results	Test number	Test results
				Example 1	Is that	Comparative example 7	Whether or not
Example 2	Is that	Comparative example 8	Whether or not
				Example 3	Is that	Comparative example 9	Whether or not
Example 4	Is that	Comparative example 10	Whether or not
				Comparative example 1	Is that	Comparative example 11	Whether or not
Comparative example 2	Is that	Comparative example 12	Whether or not
				Comparative example 3	Is that	Comparative example 13	Whether or not
Comparative example 4	Is that	Comparative example 14	Is that
				Comparative example 5	Whether or not	Comparative example 15	Whether or not
Comparative example 6	Whether or not

From the test results, it was found that a 24 month period of effectiveness could not be achieved when all of the ingredients in the dishwasher were mixed or component a was mixed with the components in the B, C chamber.

The machine dishwashing agents of examples 1 to 4 and comparative examples 1 to 15 after the acceleration test (preservation at 37.+ -. 2 ℃ C. For 90 days) were subjected to a sterilization (test microorganism selected as Staphylococcus aureus ATCC 6538) performance test, and the sterilization performance data thereof were obtained as shown in Table 4 below.

Table 4 Table 1-4 and comparative examples 1-15 are tables of machine dishwashing agent antibacterial property data

As can be seen from Table 4, the degerming rates of examples 1 to 4 are all higher than 99.99%, and the degerming performance is high; the comparative examples 1-2 were low in sodium percarbonate content and poor in sterilization performance; comparative examples 3 to 4 contained excessive sodium percarbonate, and the improvement of the sterilizing effect was not remarkable, but the addition of excessive sodium percarbonate increased the cost.

The machine dishwashing agents of examples 1 to 4 and comparative examples 11 to 15 were subjected to an accelerated pot life test (preservation at 37.+ -. 2 ℃ for 135 days), and the rate of decrease in the sodium percarbonate content of the main active ingredient before and after the test was detected to determine whether the machine dishwashing agents of examples 1 to 4 and comparative examples 11 to 15 were available for 36 months (the rate of decrease in the sodium percarbonate content was not higher than 30% was available). The test results are shown in Table 5.

TABLE 5 36 month expiration date test results for examples 1-4 and comparative examples 11-15

Test number	Test results	Test number	Test results
				Example 1	Is that	Comparative example 11	Whether or not
Example 2	Is that	Comparative example 12	Whether or not
				Example 3	Is that	Comparative example 13	Whether or not
Example 4	Is that	Comparative example 14	Is that
						Comparative example 15	Whether or not

From the test results, it was found that a 36 month period of effectiveness could not be achieved when all of the ingredients in the dishwasher were mixed or component a was mixed with the components in the B, C chamber.

The machine dishwashing agents of examples 1 to 4 and comparative examples 11 to 15 after the acceleration test (preservation at 37.+ -. 2 ℃ C. For 135 days) were subjected to a sterilization (test microorganism selected as Staphylococcus aureus ATCC 6538) performance test, and the sterilization performance data thereof were obtained as shown in Table 6 below.

Table 6 Table 1-4 and comparative examples 11-15 show the machine dishwashing agent antibacterial property data

Solubility test of Water-soluble film

The polyethylene-vinyl alcohol water-soluble films of test examples 2 to 7 were prepared according to the mass ratio of polyvinyl alcohol to ethylene shown in Table 7, and the thickness of the films was uniformly adjusted to 0.75. Mu.m.

TABLE 7 test examples 1-7

	Distinction from sample 3
		Test example 1	Polyvinyl alcohol film
Test example 2	The mass ratio of the polyvinyl alcohol to the ethylene is 10:0.1
		Test example 3	The mass ratio of the polyvinyl alcohol to the ethylene is 10:0.5
Test example 4	The mass ratio of the polyvinyl alcohol to the ethylene is 10:1
		Test example 5	The mass ratio of the polyvinyl alcohol to the ethylene is 10:1.5
Test example 6	The mass ratio of the polyvinyl alcohol to the ethylene is 10:2
		Test example 7	The mass ratio of the polyvinyl alcohol to the ethylene is 10:3
Test example 8	The mass ratio of the polyvinyl alcohol to the ethylene is 10:4
		Test example 9	The mass ratio of the polyvinyl alcohol to the ethylene is 10:5

The dissolution times of the polyvinyl alcohol film of test example 1 and the polyethylene-vinyl alcohol water-soluble films of test examples 2 to 9 were as shown in the following Table 8.

TABLE 8 dissolution time of test examples 1-9 films

As can be seen from Table 8, the films of test examples 1 to 6 were completely dissolved in water; and the water solubility of the polyethylene-vinyl alcohol water-soluble film is reduced along with the increase of the ethylene content.

Alkali resistance test of water-soluble film

The water-soluble films prepared in test examples 1-6 are respectively used as carriers, and a cavity A, a cavity B and a cavity C are arranged in the carriers, and the components and the contents of the cavities are the same as those in the embodiment 3, so that the dish washing agent in test examples 1-6 is prepared.

The dishwashing agents of test examples 1 to 6 were stored at 37.+ -. 2 ℃ for 135 days, and the water-soluble film was examined for corrosion (cracking). The test results are shown in Table 9.

Table 9 results of alkali resistance test of dishwashing agents of test examples 1 to 6

Test number

Test example 1

Test example 2

Test example 3

Test example 4

Test example 5

Test example 6

Test results

Rupture of

No abnormality is seen

From the test results, the polyethylene-vinyl alcohol water-soluble film has better alkali resistance than the polyvinyl alcohol film.

The foregoing description is only an example to further illustrate the technical content of the present invention, so that the reader can easily understand the technical content, but the embodiments of the present invention are not limited thereto, and any technical extension or recreating according to the present invention is protected by the present invention.

Claims

1. A bowl washing agent for a machine is characterized in that a polyethylene-vinyl alcohol water-soluble film is used as a carrier, and a cavity A, a cavity B and a cavity C are arranged in the carrier;

the component A in the cavity A is prepared from the following raw materials in percentage by mass: 1% -5% of anhydrous sodium metasilicate, 15% -30% of sodium percarbonate and 100% of sodium carbonate;

the component B in the cavity B is prepared from the following raw materials: 10-20% of tetraacetyl ethylenediamine, 5-10% of ethylenediamine tetraacetic acid, 5-10% of a dispersing agent and 100% of citric acid;

the component C in the cavity C is prepared from the following raw materials: 3-6% of propylene glycol, 1-3% of water, 2-5% of enzyme preparation and 100% of surfactant;

the component A comprises the following components: component B: the mass ratio of the component C is 10: (2-5): (1-4);

the polyethylene-vinyl alcohol water-soluble film is prepared by adding ethylene into polyvinyl alcohol during polymerization; the mass ratio of the polyvinyl alcohol to the ethylene is 10: (1-2), polymerization conditions: the reaction temperature is 100-300 ℃, and the catalyst is NaOH and the pressure is normal;

the dispersing agent is selected from one of sodium acrylate and acrylamide copolymer and sodium polyacrylate;

the surfactant is selected from one of fatty alcohol alkoxy compound and ethoxylated fatty acid methyl ester;

the enzyme preparation is selected from one or more of alkaline protease, amylase, lipase and cellulase.

2. The machine dishwashing agent of claim 1, wherein the polyvinyl alcohol and ethylene are present in a mass ratio of 10:1.5.

3. a machine dishwashing agent according to claim 2 wherein the pH in the C cavity is from 6 to 8.

4. A machine dishwashing agent according to claim 3, wherein the a-cavity component a is made from the following materials in mass fraction: anhydrous sodium metasilicate 2%, sodium percarbonate 18%, sodium carbonate up to 100%;

the component B in the cavity B is prepared from the following raw materials: 12% of tetraacetyl ethylenediamine, 6% of ethylenediamine tetraacetic acid, 6% of dispersing agent and 100% of citric acid;

the component C in the cavity C is prepared from the following raw materials: propylene glycol 4%, water 1%, papain 3%, fatty alcohol alkoxylate to 100%;

5. a machine dishwashing agent according to claim 3, wherein the a-cavity component a is made from the following materials in mass fraction: 3% of anhydrous sodium metasilicate, 22% of sodium percarbonate and 100% of sodium carbonate;

the component B in the cavity B is prepared from the following raw materials: 15% of tetraacetyl ethylenediamine, 7% of ethylenediamine tetraacetic acid, 7% of dispersing agent and 100% of citric acid;

the component C in the cavity C is prepared from the following raw materials: propylene glycol 4%, water 2%, papain 3%, fatty alcohol alkoxylate to 100%;