A dishwasher detergent composition for plastic tableware and use thereof

Abstract

The present application relates to the field of detergent technology, and provides a dishwasher detergent composition for plastic tableware and application thereof, which comprises a surfactant and a reducing agent, wherein the surfactant is mainly composed of alkyl polyglycoside; the reducing agent is mainly composed of one or more of sodium mercaptoacetate, 2-mercaptoethanol, mercaptoacetic acid, dithiothreitol, sodium sulfite, dithioerythritol and cysteine; through the compounding and synergy of alkyl polyglycoside and the reducing agent, stubborn stains on the plastic tableware can be effectively removed; in particular, the specific reducing agent can replace the existing oxygen bleaching system, thereby reducing the damage to the tableware, especially the plastic tableware, caused by direct oxidation. In addition, the mild bio-based surfactant is used in the composition, thereby reducing the damage to the plastic tableware caused by the conventional alkoxyl-containing nonionic surfactant, and the surfactant has high emulsification and good wetting property, so that the cleaning power for the plastic tableware can be effectively improved and the composition is more mild.

Description

Technical Field

[0001] This invention relates to the field of detergent technology, and more particularly to a dishwasher washing composition for plastic tableware and its application. Background Technology

[0002] Plastic tableware is more hydrophobic than ceramic, glass, and metal. Currently, common dishwashing powders and other detergents used for ceramic granules and glass are not effective at cleaning stains and other contaminants from plastic tableware. Furthermore, with prolonged use, market feedback indicates that plastic tableware ages faster, becomes brittle, and cracks in dishwashers.

[0003] In the technical solution disclosed in US20150152356A1, in order to reduce the stain residue on the surface of plastic tableware, a dishwasher detergent containing hydrophobically modified polysaccharide and sulfonic acid polymer as a water softener was proposed. However, although the method has a certain effect on stains on plastic tableware, it still does not solve the problem of accelerated aging, brittleness and cracking of plastic tableware in the dishwasher. Summary of the Invention

[0004] This invention provides a dishwasher washing composition for plastic tableware and its application, which achieves efficient cleaning of plastic tableware in the dishwasher while significantly delaying the problems of aging and cracking.

[0005] Specifically, the present invention provides a dishwasher washing composition for plastic tableware, comprising a surfactant and a reducing agent;

[0006] The surfactant is mainly composed of alkyl glycosides;

[0007] The reducing agent is mainly composed of one or more of the following: sodium thioacetate, 2-mercaptoethanol, thioacetic acid, dithiothreitol, sodium sulfite, dithioerythritol, and cysteine.

[0008] The dishwasher washing composition for plastic tableware provided according to the present invention uses dithioerythritol as the reducing agent.

[0009] The dishwasher washing composition for plastic tableware provided according to the present invention further includes one or more of the following: enzyme preparations, chelating agents, polymer dispersants, alkaline additives, other additives, and fillers.

[0010] The dishwasher washing composition for plastic tableware provided according to the present invention comprises, by weight percentage:

[0011] Surfactant 0.1-10%;

[0012] Enzyme preparations: 0.01–20%;

[0013] Chelating agent 0.1-40%;

[0014] Polymer dispersant 0.1-20%;

[0015] Alkaline additives 5-50%;

[0016] Other adjuvants: 0.1-5%;

[0017] Filler allowance.

[0018] According to the dishwasher washing composition for plastic tableware provided by the present invention, the enzyme preparation includes one or more of protease, amylase and mannanase;

[0019] And / or, the chelating agent includes one or more of citric acid, hydroxyethyl ethylenediamine triacetic acid, ethylenediaminetetraacetic acid, iminodisuccinic acid, methylglycine diacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, hydroxyethylidene diphosphonic acid, and their salts;

[0020] And / or, the polymer dispersant comprises one or more of acrylic maleic acid copolymer, sulfonated polymer and polycarboxylate polymer, having a weight average molecular weight of 2,000 to 80,000;

[0021] And / or, the alkaline additive includes one or more of sodium hydroxide, potassium hydroxide, sodium metasilicate, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium disilicate, triethanolamine, and monoethanolamine; preferably, the alkaline additive is one or more of sodium carbonate, sodium bicarbonate, and sodium metasilicate.

[0022] And / or, the other additives include one or more of the following: pigments, fragrances, defoamers, pH adjusters (citric acid), and corrosion inhibitors;

[0023] And / or, the filler comprises sulfate and / or sodium chloride.

[0024] According to the dishwasher washing composition for plastic tableware provided by the present invention, the dishwasher washing composition for plastic tableware comprises:

[0025] Alkyl glycosides 3-10%;

[0026] Dithioerythritol 5-15%;

[0027] Enzyme preparation 0.1-1.5%;

[0028] Chelating agent 20-30%;

[0029] Polymer dispersant 3-8%;

[0030] Alkaline additives 25-30%;

[0031] Other adjuvants: 0.1%–1%;

[0032] Filler allowance;

[0033] The enzyme preparation is a protease and / or an amylase;

[0034] The chelating agent is sodium citrate and / or methylglycine diacetic acid;

[0035] The polymer dispersant is an acrylic-maleic acid copolymer;

[0036] The alkaline additive is sodium metasilicate and / or sodium carbonate;

[0037] The other additives are fragrances and / or defoamers;

[0038] The filler is sodium sulfate.

[0039] Secondly, the present invention also provides a mild liquid or solid detergent for dishwashers of plastic tableware, including the dishwasher washing composition for plastic tableware as described above.

[0040] Thirdly, the present invention also provides a method for cleaning plastic tableware, wherein the plastic tableware is placed in a dishwasher and cleaned using a detergent containing the dishwasher washing composition for plastic tableware described above.

[0041] According to the cleaning method for plastic tableware provided by the present invention, the plastic tableware is one or more of the following materials: polypropylene tableware, polystyrene tableware, melamine tableware, polycarbonate tableware, silicone tableware, and acrylic tableware.

[0042] The dishwasher washing composition for plastic tableware and its application provided by this invention, through the synergistic combination of alkyl glycoside surfactants and reducing agents, can effectively remove stubborn stains from plastic tableware. In particular, the specific reducing agent can replace existing oxygen bleaching systems, reducing damage to tableware, especially plastic tableware, caused by direct oxidation. Furthermore, the composition employs a mild bio-based surfactant, reducing the damage to plastic tableware caused by conventional alkoxy-containing nonionic surfactants. This type of surfactant has high emulsification and good wetting properties, effectively improving cleaning power for plastic tableware. The two technologies in this composition work synergistically to specifically enhance cleaning power for plastic tableware while being gentler. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0044] For detergents, surfactants reduce the surface tension of water and weaken the adhesion of dirt to the surface of tableware through wetting, dispersing, and emulsifying effects, making it easier for dirt to detach from the tableware and disperse into the water. Currently, the surfactants used in detergents specifically for automatic dishwashers are low-foaming nonionic surfactants, mainly including fatty alcohol alkoxylates, capped alcohol ethers, and polyoxyethylene / polyoxypropylene block copolymers.

[0045] Plastic tableware mainly includes: polypropylene tableware, polystyrene tableware, melamine tableware, polycarbonate tableware, etc. The surface of plastic tableware is more hydrophobic than ceramic, glass, and metal, making it more difficult to clean. To ensure effective cleaning of plastic tableware, especially to reduce the adhesion of colored stains such as tea stains, coffee stains, fruit stains, and red wine stains, dishwasher detergents generally use chlorine bleaching and oxygen bleaching systems in addition to the surfactants mentioned above.

[0046] This invention discovered that the yellowing and cracking of plastic tableware caused by dishwasher detergents containing bleaching systems and possessing stronger cleaning power are closely related to the type of surfactant and the bleach used to remove stains. This may be because plastic tableware is made of high-molecular polymers, and the "defects" in the polymer (such as C=C and allyl groups) are easily oxidized to form hydroperoxides, which then decompose to form active groups, continuing the reaction and becoming a free radical chain reaction (auto-oxidation). Furthermore, plastics often contain small amounts of additives to ensure the usability of plastic tableware, such as strength and anti-aging properties. However, chlorine-containing and oxygen-containing bleaching systems, under the action of surfactants, oxidize the polymer, causing its structure to break down and decompose; on the other hand, they also weaken the effect of additives, further damaging the structure of the plastic tableware.

[0047] Therefore, this invention provides a dishwasher washing composition for plastic tableware. Through in-depth research on plastic plates and their contaminants, it proposes using alkyl glycosides as the main surfactant and one or more of sodium thioacetate, 2-mercaptoethanol, thioacetic acid, dithiothreitol, sodium sulfite, dithioerythritol, and cysteine ​​as the main reducing agent to construct a reduction cleaning scheme. Utilizing the synergistic effect of alkyl glycosides and specific reducing agents, it achieves highly efficient cleaning of plastic tableware in the dishwasher while significantly delaying aging and cracking. Specifically, the reducing agent selected in this invention has the ability to reduce contaminants on plastic tableware, causing their color-developing structures to fail and become non-coloring, or decomposing them into smaller structures that are easily washed away from the tableware surface without damaging the plastic structure. Low-foaming nonionic surfactants mainly include fatty alcohol alkoxylates, capped alcohol ethers, and polyoxyethylene / polyoxypropylene block copolymers. Their hydrophilic parts are similar in structure to plasticizers, making them easy to penetrate into the plastic and increase local stress, which makes the plastic more prone to small cracks and damage. The hydrophilic part of alkyl glycosides is a glycoside, which makes it difficult for them to embed into the plastic and cause damage. In addition, their wetting and emulsification are often better than those of low-foaming surfactants, helping the reducing agent to penetrate into the stain and emulsify and encapsulate the stains decomposed by the reducing agent, and remove them from the surface of the tableware. Specifically, for contaminants on plastic plates, such as spinach, minced meat, and tea stains, the stubborn stains can become oxidized due to environmental factors such as light and temperature. Sodium thioacetate, 2-mercaptoethanol, thioacetic acid, and cysteine, which contain thiol groups, as well as dithiothreitol and dithioerythritol, which contain sulfur atoms, and sodium sulfite, which contains sulfite groups, have been shown in experiments to have sufficient reducing power to clean the above-mentioned contaminants under the wetting and emulsifying effect of alkyl glycosides, without causing damage to the plastic tableware, which also has a hydrophobic surface.

[0048] Specifically, the present invention provides a dishwasher washing composition for plastic tableware, comprising a surfactant and a reducing agent;

[0049] The surfactant is mainly composed of alkyl glycosides;

[0050] The reducing agent is mainly composed of one or more of the following: sodium thioacetate, 2-mercaptoethanol, thioacetic acid, dithiothreitol, sodium sulfite, dithioerythritol, and cysteine.

[0051] The alkyl glycoside comprises one or more of the structures shown in Formula I:

[0052]

[0053] Where n is 1 to 3 and R is an alkyl group with a carbon chain length of 6 to 18.

[0054] The dishwasher washing composition for plastic tableware provided by the present invention uses dithioerythritol as the reducing agent. The present invention has found that, among the reducing agents selected above, dithioerythritol exhibits the best reducing effect.

[0055] The dishwasher washing composition for plastic tableware provided according to the present invention further includes one or more of the following: enzyme preparations, chelating agents, polymer dispersants, alkaline additives, other additives, and fillers.

[0056] The dishwasher washing composition for plastic tableware provided according to the present invention comprises, by weight percentage:

[0057] Surfactant 0.1-10%;

[0058] Enzyme preparations: 0.01–20%;

[0059] Chelating agent 0.1-40%;

[0060] Polymer dispersant 0.1-20%;

[0061] Alkaline additives 5-50%;

[0062] Other adjuvants: 0.1-5%;

[0063] Filler allowance;

[0064] According to the dishwasher washing composition for plastic tableware provided by the present invention, the enzyme preparation includes one or more of protease, amylase and mannanase;

[0065] The present invention further adds protease, amylase or mannanase, which can be used to treat other residues on plastic tableware, such as protein substances, starch substances and mannans.

[0066] Enzyme preparations including the aforementioned proteases, amylases, mannanases, and oxidases require consideration of their enzyme activity. Experiments have shown that the enzyme preparations selected in this invention all exhibit good enzyme activity at dishwasher washing temperatures.

[0067] And / or, the chelating agent includes one or more of citric acid, hydroxyethyl ethylenediamine triacetic acid, ethylenediaminetetraacetic acid, iminodisuccinic acid, methylglycine diacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, hydroxyethylidene diphosphonic acid, and their salts;

[0068] And / or, the polymer dispersant comprises one or more of acrylic maleic acid copolymer, sulfonated polymer and polycarboxylate polymer, having a weight average molecular weight of 2,000 to 80,000;

[0069] And / or, the alkaline additive includes one or more of sodium hydroxide, potassium hydroxide, sodium metasilicate, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium disilicate, triethanolamine, and monoethanolamine; preferably, the alkaline additive is one or more of sodium carbonate, sodium bicarbonate, and sodium metasilicate.

[0070] And / or, the other additives include one or more of the following: pigments, fragrances, defoamers, pH adjusters (citric acid), and corrosion inhibitors;

[0071] And / or, the filler comprises sulfate and / or sodium chloride.

[0072] The main functions of the above-mentioned additives include:

[0073] Alkaline additives: provide an alkaline environment for the washing process, causing stains and tableware to repel each other due to their similar electrical charge, thus loosening the stains; at the same time, they provide a saponification effect, which converts insoluble grease into water-soluble fatty acid salts, making them easier to remove.

[0074] Chelating agent: chelates calcium and magnesium ions to prevent scale buildup.

[0075] Polymer dispersants: They can encapsulate and disperse small particles of dirt and scale that have already been washed away, preventing them from depositing on the surface of tableware and improving cleaning power.

[0076] According to the dishwasher washing composition for plastic tableware provided by the present invention, the dishwasher washing composition for plastic tableware comprises:

[0077] Alkyl glycosides 3-10%;

[0078] Dithioerythritol 5-15%;

[0079] Enzyme preparation 0.1-1.5%;

[0080] Chelating agent 20-30%;

[0081] Polymer dispersant 3-8%;

[0082] Alkaline additives 25-30%;

[0083] Other adjuvants: 0.1%–1%;

[0084] Filler allowance;

[0085] The enzyme preparation is a protease and / or an amylase;

[0086] The chelating agent is sodium citrate and / or methylglycine diacetic acid;

[0087] The polymer dispersant is an acrylic-maleic acid copolymer;

[0088] The alkaline additive is sodium metasilicate and / or sodium carbonate;

[0089] The other additives are fragrances and / or defoamers;

[0090] The filler is sodium sulfate.

[0091] Secondly, the present invention also provides a mild liquid or solid detergent for dishwashers of plastic tableware, including the dishwasher washing composition for plastic tableware as described above.

[0092] The washing composition of the present invention can be prepared into liquid or solid form for use using existing methods. In order to ensure the cleaning effect of the washing composition during washing, the method can ensure the integrity and effectiveness of the raw material structure such as reducing agent and alkyl glycoside in the liquid or solid detergent containing the washing composition.

[0093] Thirdly, the present invention also provides a method for cleaning plastic tableware, wherein the plastic tableware is placed in a dishwasher and cleaned with a detergent containing the dishwasher washing composition for plastic tableware as described above.

[0094] According to the cleaning method for plastic tableware provided by the present invention, the plastic tableware is one or more of the following materials: polypropylene tableware, polystyrene tableware, melamine tableware, polycarbonate tableware, silicone tableware, and acrylic tableware.

[0095] Where specific techniques or conditions are not specified in the examples, they shall be performed in accordance with the techniques or conditions described in the literature in this field, or in accordance with the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased through legitimate channels.

[0096] The alkyl glycoside used in this embodiment of the invention is trade name: Glucopon 215CSUP, where R is an alkyl group with a chain length of 8 to 10 carbons, the degree of polymerization of the sugar (i.e., the value of n) is 1.4 to 1.8, and it is derived from BASF.

[0097] The acrylic-maleic acid copolymer used in this embodiment of the invention is commercially known as Sokalan CP5 and is sourced from BASF.

[0098] Washing compositions of Examples 1-3

[0099] A washing composition, the formulation of which is shown in the table below:

[0100]

[0101] The washing composition is obtained by mixing the above raw materials evenly.

[0102] Example 4 Washing Composition

[0103] This is essentially the same as Example 1, except for the washing composition, the formulation of which is shown in the table below:

[0104]

[0105] Example 5 Washing Composition

[0106] This is essentially the same as Example 1, except for the washing composition, the formulation of which is shown in the table below:

[0107]

[0108]

[0109] Comparative Examples 1-3

[0110] A composition having the formulation shown in the table below:

[0111]

[0112] The washing composition is obtained by mixing the above raw materials evenly.

[0113] Comparative Example 4

[0114] This is essentially the same as Example 1, except for the washing composition, the formulation of which is shown in the table below:

[0115]

[0116] Comparative Example 5

[0117] This is essentially the same as Example 1, except for the washing composition, the formulation of which is shown in the table below:

[0118]

[0119]

[0120] Test Example 1: Cleaning Power Test

[0121] The compositions of the above embodiments and comparative examples were used to test the cleaning power of plastic tableware. The test method involved selecting spinach, minced meat, and tea stains as stains. These stains were applied to melamine tableware using a method consistent with GB 38383-2019, "Energy Efficiency and Water Efficiency Limits and Grades for Dishwashers." After application, the plates were aged in an 80°C oven for 1.5 hours. The tea stains were treated according to the tea stain criteria in GB 38383-2019, except that the mugs were replaced with the plastic tableware of this invention. The dishwasher model selected was a Miele-G1222SC standard dishwasher, with a detergent dosage of 25g. The test procedure was EN / IEC, and the load capacity was 12 place settings. The cleaning index was evaluated using a method consistent with GB 20290-2016.

[0122] The test results of the example are shown below:

[0123] Cleanliness Index - Spinach - 8-inch Shallow Plate 3.5 3.6 5.0 2.5 2.4 Cleanliness Index - Spinach - 8-inch Deep Plate 3.0 3.2 4.5 2.5 2.3 Cleanliness Index - Minced Meat - 8-inch Shallow Plate 2.8 4.0 5.0 2.1 2.0 Cleaning Index - Tea Stains - Teacup 2.0 3.3 4.0 1.5 1.5 Cleanliness Index - Oatmeal - Rice Bowl 3.0 3.5 3.5 2.0 2.0 Cleanliness Index - Average 2.8 3.5 4.2 2.0 2.0

[0124] The results of the comparative test are shown below:

[0125] Cleanliness Index - Spinach - 8-inch Shallow Plate 0 0 0 0 0.5 Cleanliness Index - Spinach - 8-inch Deep Plate 0 0 0 0 0.5 Cleanliness Index - Minced Meat - 8-inch Shallow Plate 1 1.2 1 0.5 0.5 Cleaning Index - Tea Stains - Teacup 2.6 2.5 0 0.5 0 Cleanliness Index - Oatmeal - Rice Bowl 1 1.4 1.2 0.5 0.5 Cleanliness Index - Average 1.2 1.3 0.5 0.4 0.4

[0126] Test Example 2 Corrosion Test

[0127] The washing compositions of the above embodiments and comparative examples were used to conduct a corrosion test on plastic tableware. The test method was as follows: a 10 g / L detergent solution was prepared, and 500 g of the detergent solution was added to a glass bottle. Disposable plastic spoons, silicone nipples, and acrylic sheets were placed in the detergent solution. After sealing the bottle, it was placed in a 50°C oven for 72 hours. Afterward, the tableware was observed and scored. (3 points: no obvious change; 2 points: cracks, slight color change; 1 point: complete cracking, obvious color change)

[0128] The test results of the example are shown below:

[0129] Polypropylene spoon 3 3 3 3 3 silicone nipples 3 3 3 3 3 Acrylic sheet 3 3 3 3 3 melamine tableware 3 3 3 3 3 Average score 3 3 3 3 3

[0130] The results of the comparative test are shown below:

[0131] Polypropylene spoon 1 1 1 3 3 silicone nipples 2 1 2 3 3 Acrylic sheet 1 1 1 3 3 melamine tableware 1.3 1 1 3 3 Average score 1 1 1 3 3

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dishwasher washing composition for plastic tableware, characterized in that, Including surfactants and reducing agents; The surfactant is mainly composed of alkyl glycosides; The reducing agent is mainly composed of dithiothreitol and / or dithioerythritol.

2. The dishwasher washing composition for plastic tableware according to claim 1, characterized in that, Also includes: One or more of the following: enzyme preparations, chelating agents, polymer dispersants, alkaline additives, other additives, and fillers.

3. The dishwasher washing composition for plastic tableware according to claim 1 or 2, characterized in that, The dishwasher washing composition for plastic tableware comprises, by weight percentage: Surfactant 0.1~10%; Reducing agent 1~20% Enzyme preparations: 0.01-20%; Chelating agent 0.1~40%; Polymer dispersant 0.1~20%; Alkaline additives 5-50%; Other additives: 0.1-5%; Filler allowance.

4. The dishwasher washing composition for plastic tableware according to claim 3, characterized in that, The dishwasher washing composition for plastic tableware comprises, by weight percentage: Surfactant 3~10%; Reducing agent 5~15%; Enzyme preparation 0.1~1.5%; Chelating agent 20-30%; Polymer dispersant 3-8%; Alkaline additives 25-30%; Other additives: 0.1%~1%; Filler allowance.

5. The dishwasher washing composition for plastic tableware according to claim 2 or 4, characterized in that, The enzyme preparation includes one or more of protease, amylase and mannanase; And / or, the chelating agent includes one or more of citric acid, hydroxyethyl ethylenediamine triacetic acid, ethylenediaminetetraacetic acid, iminodisuccinic acid, methylglycine diacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, hydroxyethylidene diphosphonic acid, and their salts; And / or, the polymer dispersant comprises one or more of the following: acrylic maleic acid copolymer, sulfonated polymer and polycarboxylate polymer; And / or, the alkaline additive includes one or more of sodium hydroxide, potassium hydroxide, sodium metasilicate, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium disilicate, triethanolamine, and monoethanolamine; And / or, the other additives include one or more of the following: pigments, fragrances, defoamers, pH adjusters, and corrosion inhibitors; And / or, the filler comprises sulfate and / or sodium chloride.

6. The dishwasher washing composition for plastic tableware according to claim 3, characterized in that, The enzyme preparation includes one or more of protease, amylase and mannanase; And / or, the chelating agent includes one or more of citric acid, hydroxyethyl ethylenediamine triacetic acid, ethylenediaminetetraacetic acid, iminodisuccinic acid, methylglycine diacetic acid, glutamic acid diacetic acid, aspartic acid diacetic acid, hydroxyethylidene diphosphonic acid, and their salts; And / or, the polymer dispersant comprises one or more of the following: acrylic maleic acid copolymer, sulfonated polymer and polycarboxylate polymer; And / or, the alkaline additive includes one or more of sodium hydroxide, potassium hydroxide, sodium metasilicate, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, sodium disilicate, triethanolamine, and monoethanolamine; And / or, the other additives include one or more of the following: pigments, fragrances, defoamers, pH adjusters, and corrosion inhibitors; And / or, the filler comprises sulfate and / or sodium chloride.

7. The dishwasher washing composition for plastic tableware according to claim 5, characterized in that, The dishwasher washing composition for plastic tableware includes: Alkyl glycosides 3-10%; Dithioerythritol 5-15%; Enzyme preparation 0.1~1.5%; Chelating agent 20-30%; Polymer dispersant 3-8%; Alkaline additives 25-30%; Other additives: 0.1%~1%; Filler allowance; The enzyme preparation is a protease and / or an amylase; The chelating agent is sodium citrate and / or methylglycine diacetic acid; The polymer dispersant is an acrylic-maleic acid copolymer; The alkaline additive is sodium metasilicate and / or sodium carbonate; The other additives are fragrances and / or defoamers; The filler is sodium sulfate.

8. The dishwasher washing composition for plastic tableware according to claim 6, characterized in that, The dishwasher washing composition for plastic tableware includes: Alkyl glycosides 3-10%; Dithioerythritol 5-15%; Enzyme preparation 0.1~1.5%; Chelating agent 20-30%; Polymer dispersant 3-8%; Alkaline additives 25-30%; Other additives: 0.1%~1%; Filler allowance; The enzyme preparation is a protease and / or an amylase; The chelating agent is sodium citrate and / or methylglycine diacetic acid; The polymer dispersant is an acrylic-maleic acid copolymer; The alkaline additive is sodium metasilicate and / or sodium carbonate; The other additives are fragrances and / or defoamers; The filler is sodium sulfate.

9. A mild liquid or solid detergent for dishwashers used with plastic tableware, characterized in that, The dishwasher washing composition for plastic tableware included in any one of claims 1 to 8.

10. A method for cleaning plastic tableware, characterized in that, The plastic tableware is placed in a dishwasher and cleaned with a detergent containing the dishwasher washing composition for plastic tableware as described in any one of claims 1 to 8.

11. The method for cleaning plastic tableware according to claim 10, characterized in that, The plastic tableware is one or more of the following materials: polypropylene tableware, polystyrene tableware, melamine tableware, polycarbonate tableware, and acrylic tableware.

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