Dish washing tablet, method for preparing same and method for using same

Abstract

The present invention relates to a dish washing tablet, a method for preparing same and a method for using same. The dish washing tablet is mainly prepared from the following components in parts by mass: 15-35 parts of a low-molecular-weight water-soluble polymer, 10-25 parts of an anionic surfactant, 5-20 parts of a nonionic surfactant, 0.3-5 parts of a forming aid, 1-10 parts of a polyol detergent builder, 1-10 parts of a water softener, 1-10 parts of an anti-stain dispersant, 0.1-5 parts of an enzyme preparation, 0.3-3 parts of a polymer cleaning aid, 0-1 part of essence, and 0-0.1 part of a preservative. The low-molecular-weight water-soluble polymer is used, and is compounded with a small amount of the anionic surfactant to achieve a good emulsifying effect and facilitate better tablet forming. The dish washing tablet is suitable for large-scale production, and can reduce the generation of excessive foam during washing.

Description

A dishwashing detergent tablet and its preparation method and use method Technical Field

[0001] The present invention relates to the technical field of daily detergent cleaning, in particular to a dishwashing detergent tablet and a preparation method and a use method thereof. Background Art

[0002] As people's living standards improve, household appliances are becoming increasingly common in daily life. Dishwashers, for example, have become a handy tool for many consumers. Currently, dishwashers account for over 90% of all dishwashers in Europe and the United States, and their share in the Chinese market is also expanding. Dishwashers are becoming a household necessity.

[0003] Currently, the main dishwasher detergents on the market are dishwashing tablets. These tablets are primarily made by combining alkaline inorganic salts with a small amount of anionic surfactants, stamped through a mold, and placed in the dishwasher's loading bay for regular washing. However, since adding a large amount of surfactant during preparation can cause the tablets to stick to the mold, resulting in poor formation, they cannot be mass-produced. Large amounts of inorganic salt additives are often required to facilitate forming, resulting in generally low levels of active ingredients. The addition of large amounts of inorganic salts neutralizes oil stains during washing, allowing the dishwasher's water pressure to clean and remove stains. However, these tablets have little cleaning power against stubborn stains. Furthermore, the use of large amounts of inorganic salts wastes mining resources.

[0004] Recently, dishwashing beads with detergent wrapped in a polyvinyl alcohol water-soluble film have appeared on the market. The water-soluble film is used to wrap low-foaming surfactants to achieve dishwashing. However, the dishwashing beads only rely on a layer of water-soluble film on the surface to wrap the surfactant. During transportation and storage, there is a certain risk of leakage; especially when used in an environment with high temperature and humidity, the risk of leakage increases.

[0005] The most common liquid detergent on the market is mainly prepared by compounding surfactants with water as the matrix. When poured into the dishwasher input compartment during use, leakage may occur. At the same time, using a large amount of water as the matrix will also result in a waste of water resources.

[0006] General solid tablet detergent products on the market often require the addition of a large amount of anionic surfactants to achieve a good emulsification effect on the water-soluble high molecular weight polymer polyvinyl alcohol carrier, thereby ensuring that the slurry is better formed into sheets, which is conducive to mass production. However, the addition of a large amount of anionic surfactants will generate a large amount of foam during washing. For dishwashing cleaning, it is not only difficult to rinse clean during washing, but also causes foam to overflow from the equipment, causing trouble to consumers and even the risk of damaging the equipment. Therefore, there is still room for improvement.

[0007] Summary of the Invention

[0008] Based on the above technical problems, the present application provides a dishwashing detergent tablet and its preparation method and use method, which has good washing effect, small usage, low foaming, convenient for large-scale production, easy to store and transport, and can be packaged without plastic.

[0009] The first aspect of the present application is to provide a dishwashing detergent tablet, which adopts the following technical solution:

[0010] A dishwashing detergent tablet is mainly made of the following components in parts by weight: 15 to 35 parts of a low-molecular-weight water-soluble polymer, 10 to 25 parts of anionic surfactant, 5 to 20 parts of a nonionic surfactant, 0.3 to 5 parts of a molding aid, 1 to 10 parts of a polyol builder, 1 to 10 parts of a water softener, 1 to 10 parts of an anti-stain dispersant, 0.1 to 5 parts of an enzyme preparation, 0.3 to 3 parts of a polymer cleaning aid, 0 to 1 part of a fragrance, and 0 to 0.1 part of a preservative.

[0011] This application uses a low molecular weight water-soluble polymer as a film-forming agent, and a small amount of anionic surfactant is compounded to achieve a good emulsifying effect, has excellent decontamination and cleaning effects, and can also reduce the generation of a large amount of foam during washing; at the same time, the use of a low molecular weight water-soluble polymer is conducive to the addition of more non-ionic surfactants, which is conducive to the anti-foaming effect of anionic surfactants during the washing and cleaning process, achieving the effect of low dosage, low foaming, and strong detergency; at the same time, it is conducive to keeping the sheet dry, which is conducive to meeting the requirements of plastic-free packaging.

[0012] In a second aspect, the present application provides a method for preparing dishwashing detergent tablets, which adopts the following technical solution:

[0013] A method for preparing a dishwashing detergent tablet is prepared by the following method:

[0014] (1) Add water to the reactor, heat it to 50-60°C, start homogenizing and stirring, add the water-soluble polymer, continue stirring and heat it to 80-90°C until the water-soluble polymer is completely dissolved and then stop heating;

[0015] (2) adding anionic surfactant, nonionic surfactant, polyol builder, anti-stain dispersant, water softener, and polymer cleaning aid in sequence while stirring and dissolving uniformly;

[0016] (3) Mix the molding aid with an appropriate amount of water and add it to the reactor, stirring and dissolving it evenly. Then, add the remaining components in sequence and stir and dissolve them evenly to obtain a stable slurry;

[0017] (4) The prepared slurry is transported to the drying equipment through a pipeline. During the drying process, the solid enzyme preparation is evenly distributed on the undried slurry, and the drying is continued until the solid enzyme preparation is completely adhered to the dried sheet;

[0018] (5) Demolding and slicing to obtain dishwashing detergent tablets.

[0019] Alternatively, a method for preparing a dishwashing detergent tablet is prepared by the following method:

[0020] (1) Add water to the reactor, heat it to 50-60°C, start homogenizing and stirring, add the water-soluble polymer, continue stirring and heat it to 80-90°C until the water-soluble polymer is completely dissolved and then stop heating;

[0021] (2) adding anionic surfactant, nonionic surfactant, polyol builder, anti-stain dispersant, water softener, and polymer cleaning aid in sequence while stirring and dissolving uniformly;

[0022] (3) Mix the molding aid with an appropriate amount of water and add it to the reactor, stirring and dissolving it evenly. Then, add the remaining components in sequence and stir and dissolve them evenly to obtain a stable slurry;

[0023] (4) transporting the prepared slurry through a pipeline to a drying device and drying the slurry to obtain a sheet;

[0024] (5) The liquid enzyme preparation is evenly attached to the dried sheet by smearing or spraying, and then cut into different sizes to obtain dishwashing detergent sheets.

[0025] In a third aspect, the present application provides a method for using a dishwashing detergent tablet, which adopts the following technical solution:

[0026] A method for using a dishwashing detergent tablet comprises the following steps: placing the dishwashing detergent tablet in the dishwasher compartment, or in the dishwasher bowl basket, or on the tableware, or next to the sink at the bottom of the dishwasher for washing; or diluting the dishwashing detergent tablet with an appropriate amount of water to obtain aqueous solutions of different concentrations and then performing conventional manual washing.

[0027] The dishwashing detergent tablets of the present application do not need to be placed in the dishwasher compartment, but can be directly placed in the dishwasher basket, on the tableware, or next to the sink at the bottom of the dishwasher, which is easy to use; there is no need for pre-washing, and the energy-saving mode can be turned on directly to achieve good washing and cleaning effects and save energy; it can be plastic-free and environmentally friendly; it can also be mixed with an appropriate amount of water to form aqueous solutions of different concentrations for conventional manual washing, which is convenient and practical.

[0028] In summary, this application has at least the following beneficial effects:

[0029] 1. The present application uses low molecular weight polyvinyl alcohol and / or polyvinyl alcohol cross-linked polymer as a film-forming agent and compounding a small amount of anionic surfactant in a suitable ratio to facilitate the preparation of dishwashing detergent tablets with excellent cleaning and decontamination effects. At the same time, the use of low molecular weight polyvinyl alcohol and / or polyvinyl alcohol cross-linked polymer facilitates the addition of more nonionic surfactants, which not only improves the cleaning power of the dishwashing detergent tablets, but also helps to suppress the foaming effect of the anionic surfactants during the washing process, further helping to avoid the generation of large amounts of foam during washing, achieving the effect of low usage and strong detergency. It also helps to keep the sheet dry, thereby helping to meet the requirements of plastic-free packaging.

[0030] 2. The selection of low molecular weight polyvinyl alcohol and / or polyvinyl alcohol cross-linked polymer facilitates easier incorporation of the solid enzyme preparation during the tableting process, allows for easier and more stable attachment to the dishwashing tablet, and prevents it from falling off, thereby improving the detergency of the dishwashing tablet, enabling the dishwashing tablet to achieve a higher detergency even with a small amount of usage.

[0031] 3. The anionic surfactant of the present application is preferably a composite composition of sodium alkyl sulfate and sodium fatty acid methyl ester sulfonate in a ratio of 10:(1-6); the nonionic surfactant is preferably a composition of at least one of alkyl glycoside, maltitol laurate and maltooligosaccharide glucoside polymer and any species; the water softener is preferably a composite composition of trisodium methylglycine diacetate and sodium citrate in a ratio of 3:(1-3); the anti-stain dispersant is preferably a combination of sodium polyacrylate and a copolymer of acrylic acid and sulfonic acid in a ratio of 3:(1-3); the polyol builder is preferably a combination of glycerol and propylene glycol in a ratio of any species, more preferably a combination of glycerol and any species in a ratio of 2:(1-2); the enzyme preparation is preferably a combination of protease: amylase: mannanase in a ratio of 3:(1-3):0.5. DETAILED DESCRIPTION

[0032] In order to make the invention objectives, technical solutions and beneficial technical effects of this application more clear, this application will be described in detail below. It should be noted that the various aspects, features, implementation methods and advantages described in this application can be compatible and / or can be combined together.

[0033] Unless otherwise specified, the meanings of the technical terms in this specification are the same as those generally understood by those skilled in the art.

[0034] [Corrected 05.09.2023 according to Rule 26] Regarding the sources of the raw materials involved in this application, polyvinyl alcohol can be selected from low molecular weight series products such as Changchun BP-05 from Taiwan, China, Kuraray PVA-205 or PVA-203 from Japan; non-ionic surfactant fatty alcohol polyoxyethylene ether can use alcohol ethoxylates such as Lutensol A 7N / 9N from BASF; non-ionic surfactant alkyl glucoside can be selected from BASF APG series products, such as Glucopon 215 UP, Glucopon 650EC, etc.; nonionic surfactant isomeric alcohol polyoxyethylene ether can be selected from BASF lutensol XP series products, such as XP30, XP40, XP50, etc.; water softener methylglycine diacetate trisodium can be selected from Trilon M, Trilon UItimate series products; glutamic acid diacetic acid tetrasodium salt, item number Dissolvine GL-47-S, can be obtained from Nouryon; iminodisuccinic acid sodium salt, item number IDS42, can be obtained from Shandong Yuanlian Chemical Co., Ltd.; EO-PO block polyoxyethylene ether can be obtained from Jiangsu Lianhong Technology Co., Ltd. HIG series products, such as HIG6100, HIG6200, etc.; hydroxyethyl cellulose can be obtained from Ashland Company, item number natrosol TM 250hhr, etc.; modified oil ethoxylates and fatty acid methyl ester ethoxylates can be obtained from the product No. SOE-C-60 and product No. FMEE series products of China Daily Chemical Research Institute Co., Ltd. respectively; liquid enzyme preparations can be made from Novozymes' Progress Uno series enzyme preparations, such as product No. Progress Uno 100L protease, liquid amylase (product No. SuhongAAll 2X), Mannaway 4.0L (liquid mannanase), etc.; solid enzyme preparations use Novozymes' Mannaway series 4.0T solid mannanase, amylase (product No. Stainzyme Plus Evity 12T), protease Savinase series (Savinase 4.0T / Savinase 6.0T / Savinase 8.0T / Savinase 12T / Savinase 24T, etc.; anti-stain dispersants can be selected from Dow's product No. ACUSOL TM 445NG Polymer Acrylic acid homopolymer, copolymer of acrylic acid and sulfonic acid Product No. ACUSOL TM 588G Polymer; BASF's sodium salt of maleic acid and acrylic acid copolymer, item number Sokalan CP 5, Sokalan CP 5 Granules and other products; polymer cleaning additive 1-propane ammonium, N,N,N-trimethyl-3-((2-methyl-1-oxo-2-propenyl)amino)-chloride, polymer with ethyl 2-acrylate and sodium 2-acrylate selected from Evonik Specialty Chemicals, item number: REWOCARE 755; maltitol laurate and maltooligosaccharide glucoside polymer selected from Guangzhou Qianyan New Materials Development Co., Ltd., item number PG68.

[0035] In recent years, sheet products have become increasingly popular among consumers. However, conventional sheet detergents often contain a large amount of anionic surfactants, such as sodium lauryl sulfate and sodium α-olefin sulfonate, which causes the product to produce a large amount of foam when used. When washing dishes, a large amount of foam will overflow from the dishwasher equipment, causing a lot of trouble for consumers and even the risk of damaging the equipment.

[0036] The present application selects low molecular weight polyvinyl alcohol and / or polyvinyl alcohol cross-linked polymers, and compounds a small amount of anionic surfactants in a suitable ratio, which is conducive to the good emulsification of the anionic surfactants, so that the dishwashing detergent products have better decontamination and cleaning effects, and reduce the technical problem of unclean rinsing during washing; secondly, when low molecular weight polyvinyl alcohol is added on a large scale, it is conducive to the addition of more non-ionic surfactants and water softeners, so that the appearance of the product remains dry and meets the requirements of plastic-free packaging, while helping to improve the cleaning and decontamination power of the product, and no large amount of foam is generated during use, the dosage is small, and the cleaning power is strong; thirdly, the selection of low molecular weight polyvinyl alcohol and / or polyvinyl alcohol cross-linked polymers is conducive to easier addition of solid enzyme preparations during the tableting process, easier and more stable attachment to the dishwashing detergent tablets, and not easy to fall off, thereby helping to improve the detergency of the dishwashing detergent tablets, so that the dishwashing detergent tablets can achieve a higher detergency effect when used in a small amount.

[0037] The present application relates to a dishwashing detergent tablet and a preparation method and a use method thereof.

[0038] The following is a detailed description of this application.

[0039] In a first aspect, the present application provides a dishwashing detergent tablet, which adopts the following technical solution:

[0040] 15 to 35 parts of low molecular weight water-soluble polymer, 10 to 25 parts of anionic surfactant, 5 to 20 parts of nonionic surfactant, 0.3 to 5 parts of molding aid, 1 to 10 parts of polyol builder, 1 to 10 parts of water softener, 1 to 10 parts of anti-stain dispersant, 0.1 to 5 parts of enzyme preparation, 0.3 to 3 parts of polymer cleaning aid, 0 to 1 part of fragrance, and 0 to 0.1 part of preservative.

[0041] In some embodiments, the water-soluble high molecular weight polymer is selected from polyvinyl alcohol and / or polyvinyl alcohol cross-linked polymer, the polyvinyl alcohol having an average degree of polymerization of 250 to 650, an average molecular weight of 10,000 to 40,000, and a degree of alcoholysis of 86% to 89%. Preferably, the average molecular weight of the polyvinyl alcohol is 15,000 to 32,000; for example, the average molecular weight of the polyvinyl alcohol is 12,000, 13,000, 14,000, 15,000, 16,000, 17,000, 18,000, 19,000, 20,000, 22,000, 25,000, 27,000, 30,000, 32,000, or a range consisting of any two of the above values.

[0042] In some specific embodiments, the anionic surfactant is selected from at least one and / or any combination of alkyl sulfates, alkyl polyether sulfates, fatty acid methyl ester sulfonates, fatty acid methyl ester ethoxylate sulfonates, modified oil ethoxylate sulfonates, and alcohol ether carboxylates with a carbon chain between C8 and C22; optionally, at least one and / or any combination of sodium alkyl sulfate, potassium alkyl sulfate, sodium alkylbenzene sulfonate, sodium α-olefin sulfonate, sodium alkyl polyether sulfate, sodium fatty acid methyl ester ethoxylate sulfonate, modified oil ethoxylate sulfonate, and sodium fatty acid methyl ester sulfonate; preferably, a composite composition of sodium alkyl sulfate and any combination with sodium fatty acid methyl ester sulfonate in a ratio of 10:(1-6); more preferably, a composite composition of sodium alkyl sulfate and sodium fatty acid methyl ester sulfonate in a ratio of 10:(1-6).

[0043] In some specific embodiments, the nonionic surfactant is selected from at least one of a carbon chain C6-C18 alkyl glycoside, a polymer of maltitol laurate and maltooligosaccharide glucoside, an alcohol ether glycoside, a fatty alcohol polyoxyethylene ether, an isomeric alcohol polyoxyethylene ether, an EO-PO block polyoxyethylene ether, a modified oil ethoxylate, and a fatty acid methyl ester ethoxylate. A combination of at least one of an alkyl glycoside, maltitol laurate, and maltooligosaccharide glucoside polymer and any other is preferred; a combination of an alkyl glycoside, maltitol laurate, and maltooligosaccharide glucoside polymer and any other is more preferred.

[0044] In some specific embodiments, the molding aid is selected from polysaccharide fiber polymers, optionally at least one of carboxymethyl cellulose, polyanionic cellulose, hydroxypropyl methyl cellulose, and hydroxyethyl cellulose; preferably at least one of hydroxypropyl methyl cellulose and hydroxyethyl cellulose.

[0045] In some specific embodiments, the water softener can be selected from at least one of sodium ethylenediamine di-o-phenylacetate, sodium / potassium tripolyphosphate, sodium citrate, sodium hydroxyethylidene diphosphate, tetrasodium glutamate diacetate, trisodium methylglycine diacetate, sodium iminodisuccinate, sodium polyaspartate, and sodium polyepoxysuccinate; preferably, a composite composition of tetrasodium glutamate diacetate, trisodium methylglycine diacetate, sodium iminodisuccinate and sodium citrate in a ratio of 3:(1-3); more preferably, a composite composition of trisodium methylglycine diacetate and sodium citrate in a ratio of 3:(1-3).

[0046] In some specific embodiments, the anti-stain dispersant is selected from at least one of sodium salt of a copolymer of maleic acid and acrylic acid, a hydrophobically modified acrylic acid polymer, an acrylic acid homopolymer, a copolymer of acrylic acid and sulfonic acid, and sodium / potassium polyacrylate; preferably, a combination of a 3:(1-3) copolymer of sodium polyacrylate and acrylic acid and sulfonic acid.

[0047] In some embodiments, the polyol builder can be selected from at least one of glycerol, ethylene glycol, propylene glycol, pentanediol, and hexylene glycol, preferably glycerol and propylene glycol in any combination, more preferably glycerol in any 2:(1-2) combination.

[0048] In some specific embodiments, the enzyme preparation is selected from at least one of proteases, amylases, lipases, mannanases, cellulases, pectin lyases, oxidoreductases, and glycoside hydrolases; the enzyme preparation is a liquid type or any one or a combination of solid-phase enzyme preparations, granular enzyme preparations prepared by any one of an embedding method, a chemical binding method, and a physical adsorption method; preferably, the combination of protease: amylase: mannanase 3: (1-3): 0.5.

[0049] In some specific embodiments, the polymer cleaning aid is selected from 1-propane ammonium, N,N,N-trimethyl-3-((2-methyl-1-oxo-2-propenyl)amino)-chloride, a polymer of ethyl 2-acrylate and sodium 2-acrylate (model number REWOCARE 755).

[0050] In some specific embodiments, the preservative can be selected from at least one of hydroxydichlorodiphenyl ether and methylisothiazolinone and / or a combination of the two.

[0051] In some embodiments, the flavor is selected from daily food-grade flavors.

[0052] Example

[0053] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0054] Examples 1 to 7

[0055] The following is an example of Example 1.

[0056] Example 1-a:

[0057] A dishwashing detergent tablet is prepared by the following method:

[0058] (1) Add water to the reactor, heat it to 50-60°C, start homogenizing and stirring, add polyvinyl alcohol, continue stirring and heat it to 80-90°C until the polyvinyl alcohol is completely dissolved and evenly, and stop heating; (2) Add anionic surfactant, nonionic surfactant, polyol builder, anti-stain dispersant, water softener, and polymer cleaning aid in sequence while stirring and dissolving evenly; (3) Mix the molding aid with an appropriate amount of water (2-3 times the amount of HEC) and add it to the reactor and stir and dissolve evenly, then add the remaining components in sequence and stir and dissolve evenly to obtain a stable slurry; (4) The prepared slurry is transported to the drying equipment through a pipeline. During the drying process of the equipment, the solid enzyme preparation is evenly distributed on the undried slurry through the device, and the drying is continued until the solid enzyme preparation is completely adhered to the dried sheet; (5) Demolding and slicing are performed to obtain dishwashing tablets.

[0059] Example 1-b:

[0060] A dishwashing detergent tablet is prepared by the following method:

[0061] (1) Add water to the reactor, heat it to 50-60°C, start homogenizing and stirring, add polyvinyl alcohol, continue stirring and heat it to 80-90°C until the material is completely dissolved and evenly dissolved, and then stop heating; (2) Add anionic surfactant, nonionic surfactant, polyol builder, anti-stain dispersant, water softener, and polymer cleaning aid in sequence while stirring and dissolving evenly; (3) Mix the molding aid with an appropriate amount of water (2-3 times of HEC) and add it to the reactor and stir and dissolve evenly, then add the remaining components in sequence and stir and dissolve evenly to obtain a stable slurry; (4) Transport the prepared slurry to a drying device through a pipeline for drying; (5) Evenly attach the liquid enzyme preparation to the dried sheet by smearing or spraying, and then cut it into different sizes to obtain dishwashing detergent tablets.

[0062] Table 1 Components and mass ratios of dishwashing tablets provided in Examples 1 to 7

[0063] Example 8:

[0064] A dishwashing detergent tablet, which differs from Example 1-a in that the anionic surfactant is an alkyl sodium sulfate added in an amount of 10 kg and a fatty acid methyl ester sodium sulfonate added in an amount of 0.5 kg.

[0065] Example 9:

[0066] A dishwashing detergent tablet, which differs from Example 1-a in that the nonionic surfactants used are 12 kg of EO-PO block polyoxyethylene ether and 3 kg of fatty acid methyl ester ethoxylate.

[0067] Example 10:

[0068] A dishwashing detergent tablet, which differs from Example 1-a in that 3 kg of sodium ethylenediamine di-o-phenylacetate and 1 kg of sodium citrate are used as water softeners.

[0069] Example 11:

[0070] A dishwashing detergent tablet, which differs from Example 1-a in that 5 kg of sodium polyacrylate and 1 kg of a copolymer of acrylic acid and sulfonic acid are used as anti-stain dispersants.

[0071] Comparative Example 1:

[0072] A dishwashing detergent tablet, which differs from Example 1-a in that different polyvinyl alcohol is used. This comparative example uses product number BP-17, with an average molecular weight of 84,000 to 89,000, and still uses a low amount of anionic surfactant.

[0073] Comparative Example 2:

[0074] A dishwashing detergent tablet, which differs from Example 1-a in that different polyvinyl alcohol and anionic surfactants are used. This comparative example uses product number BP-17 with an average molecular weight of 84,000 to 89,000, and the anionic surfactants used are 15 kg of sodium alkyl sulfate and 5 kg of sodium α-olefin sulfonate.

[0075] Comparative Example 3:

[0076] Commercially available 3-chamber dishwashing gel beads.

[0077] Testing items and methods:

[0078] 1. Determination of detergency:

[0079] 1. Formula of mixed oil:

[0080] Prepared with butter: lard: vegetable oil in a ratio of 0.5:0.5:1, and adding 5% of the total amount of glyceryl monostearate, this is artificial dirt (shelf life in the refrigerator is 6 months);

[0081] Place the artificial dirt on an electric furnace and heat it to 180°C, stir and maintain this temperature for 10 minutes, move the beaker to an electromagnetic stirrer for stirring, and naturally cool to the required temperature for use. Recommended reference for smearing temperature:

[0082] When the room temperature is 20℃, the oil temperature needs to be 80℃; when the room temperature is 25℃, the oil temperature needs to be 45℃. When the room temperature is below 17℃ or above 27℃, the test should not be carried out. If necessary, a vertical decontamination machine with a refrigeration device should be used.

[0083] 2. Preparation of dirty sheets:

[0084] Draw a 10mm line on the top edge of the slide to indicate that smearing is limited to below this line; draw a 5mm line on the bottom edge of the slide to indicate that wiping off excess oil is limited to below this line;

[0085] Newly purchased slides need to be boiled in a detergent solution for 15 minutes, washed with clean water until no water droplets remain, and then soaked in an acidic solution for 1 hour. They must then be rinsed with clean water and distilled water, and then dried in a drying oven for later use.

[0086] 3. Preparation of standard dishwashing detergent:

[0087] Weigh 14 parts of sodium alkylbenzene sulfonate (based on 100%), 1 part of sodium ethoxylated alkyl sulfate (based on 100%), 5 parts of anhydrous ethanol, and 5 parts of urea, add water to 100 parts, mix, adjust the pH to 7-8 with hydrochloric acid or sodium hydroxide, and set aside.

[0088] 4. Smear:

[0089] Place clean glass slides in groups of four on a weighing rack and use an analytical balance to accurately weigh them (accurate to 1 mg) as m0. Clamp the weighed glass slides one by one on the drying rack. The clamps should be clamped on the line along the glass slides. Place the drying rack in a stuffing tray to prepare the dirt.

[0090] When the substitute oil stain is kept at a certain temperature, remove the glass slides together with the clips from the drying rack one by one, hold the clips to immerse the glass slides in the oil stain to below the 10mm upper edge line for 1s-2s, slowly take them out, and after the dripping speed of the oil stain slows down, hang them back on the original drying rack to prepare the stain slices in turn; after the oil stain solidifies, remove the stain slices and use filter paper or absorbent cotton to wipe off the excess oil stains on the bottom edge within 5mm of the bottom edge and both sides of the stain slices, then use tweezers to hold absorbent cotton soaked in petroleum ether and wipe them clean; after leaving them at room temperature for 4h, use an analytical balance to accurately weigh them as m1 on the weighing rack. At this time, the amount of stain on each group of stain slices should ensure that the amount of stain on each group of stain slices should ensure (0.5±0.05)g.

[0091] 5. Test procedures

[0092] Insert the slide with known smear amount into the corresponding washing rack and prepare for washing;

[0093] Connect the decontamination machine to the power supply, set the washing temperature to 30℃, the rotation speed to 160r / min, and the washing time to 3min;

[0094] Weigh 5.00g of the sample to be tested and add it to 2500mL of 250mg / L hard water. After shaking, measure 800mL of the test solution into the three washing buckets of the vertical decontamination machine respectively. When the temperature of the test solution rises to 30℃, quickly put the dirt pieces of known weight together with the corresponding washing racks into the washing bucket. When the last washing rack is put into the washing bucket, start the soaking time. At the same time, quickly install the agitator. After soaking for 1 minute, start the decontamination machine and start washing. After 3 minutes, the machine automatically stops. Quickly remove the agitator and take out the washing racks. Hang the washed dirt pieces one by one on the original drying rack. After hanging for 3 hours, place the dirt pieces on the corresponding weighing rack and weigh them as M2.

[0095] 6. Notes:

[0096] (1) Each batch of tests should be conducted with three sets of standard detergents and three sets of dirt pieces for each sample to be tested.

[0097] (2) Since different smearing conditions will affect the results of the oil removal rate test, no matter how many samples can be set up on the same batch of smeared slides, three sets of standard dishwashing detergents must be used for comparison.

[0098] 7. Calculation:

[0099] Where: m0 is the mass of the slide before smearing, g;

[0100] M1 is the mass of the slide after smearing, g;

[0101] M2 is the mass of the dirt flakes after washing, g.

[0102] 8. Result judgment:

[0103] If the oil removal rate of the tested dishwashing detergent is not less than that of the standard dishwashing detergent, the detergency of the dishwashing detergent is judged to be qualified, otherwise it is judged to be unqualified.

[0104] 2. Washing test:

[0105] 1. Prepare two sets of 24 bowls in advance (including porcelain bowls / plates, plastic bowls / stainless steel bowls / plates, cups, chopsticks / spoons, etc.). Apply about 8g of mixed oil to each bowl in one set and then wash it; the other set is used to observe and compare the cleanliness after washing; the specific number is 12 porcelain plates, 2 plastic bowls, 2 stainless steel bowls, 12 porcelain bowls, 10 glass cups, 6 stainless steel spoons, and 4 pairs of stainless steel chopsticks;

[0106] 2. Preparation of mixed oil:

[0107] Mix 60% cooking oil, 5% butter, 5% light cream, 4% peanut butter, 3% barbecue sauce, 2% cheese, 2% red wine, 5% salad dressing, 8% soy sauce, 2% jam, 1% tomato sauce, 1% chocolate, 1% chili oil, and 1% sesame oil in equal proportions and set aside.

[0108] 3. Place one dishwashing tablet in the dishwashing sink (dishwashing tablet) / dishwasher, wash in the daily mode (59 minutes), and observe the cleanliness after washing to see if there is any foam overflow;

[0109] 4. Dishwasher model: Haier EW130266BKD.

[0110] Operation process:

[0111] 1. Place a 4g dishwashing detergent tablet sample into the dishwasher basket, turn off the dishwasher, and start washing in the daily mode (59 minutes).

[0112] 2. Place a commercially available 3-compartment dishwashing gel ball into the dishwasher compartment, close the dishwasher compartment, turn off the dishwasher, start washing in the strong wash mode (120 minutes).

[0113] Table 2 Detergency test results of Examples 1 to 7, Examples 10 to 11 and Comparative Examples 1 to 3

[0114] Table 3 Test results of washing test of Examples 1 to 9

[0115] Combining the test results of Examples 1 to 7, Comparative Examples 1 to 3, and Table 2, it can be seen that the oil removal rate of the dishwashing detergent tablet of the present application is greater than that of the standard detergent when concentrated 2 times and 3 times, and complies with the standard GB / T 9985-2000 "Detergents for Hand-washing Dishware". Combining Table 3, it can be seen that even with a small amount of use and a shorter washing time, a cleaning degree close to 100% and no residue can be achieved, achieving the effects of low use, strong detergency, and water conservation. This is because the low molecular weight polyvinyl alcohol (molecular weight of 27,000 to 32,000) selected in the present application, when added with a small amount of anionic surfactant, can also achieve a good emulsifying effect, so that the dishwashing detergent tablet does not generate a large amount of foam during use. Moreover, more nonionic surfactants can be added to the formula, which not only helps the dishwashing detergent tablet have a better cleaning effect, but also has a good foam suppression effect on the anionic surfactant, which helps to avoid the generation of large amounts of foam when washing dishes, thereby achieving the characteristics of low foaming and strong detergency. However, the washing tablets of Comparative Example 1 use high molecular weight polyvinyl alcohol. When an anionic surfactant equal to that of Example 1-a is added, the emulsification effect of the slurry becomes poor, the slurry has a high viscosity and density, which affects the tableting effect. After washing in the dishwasher washing mode (59 minutes), the washing tablets are incompletely dissolved and there are residues in the dishwasher, resulting in insufficient cleaning power. At the same time, due to its poor emulsification effect, the solid enzyme preparation is not easy to adhere to the washing tablets, affecting the washing effect. The washing tablets of Comparative Example 2 use high molecular weight polyvinyl alcohol and increase the amount of anionic surfactant used. The washing effect meets the standard, but a large amount of foam is introduced, and there is foam residue after washing. The commercially available 3-compartment dishwashing beads of Comparative Example 3 were commissioned to China Light Industry Daily Chemical Inspection and Certification Co., Ltd. for testing. The test results were very unsatisfactory, only 0.7%. In addition, the 3-compartment dishwashing beads of Comparative Example 3 are used in large quantities and need to be washed for a long time in the strong washing mode. In addition, the 3-compartment dishwashing beads need to be placed in a fixed dishwasher input compartment when used, while the dishwashing tablets of the present application only need to be placed in the dishwashing basket or at the bottom of the dishwashing sink, which saves time and is more convenient.

[0116] Combined with the test results of Examples 1 to 7, Example 10 and Table 2, it can be seen that the detergency of the dishwashing detergent tablets is reduced, and the water softener is preferably a compound composition of trisodium methylglycine diacetate and sodium citrate in a ratio of 3: (1-3); Combined with the test results of Examples 1 to 7, Example 11 and Table 2, it can be seen that the anti-stain dispersant is preferably a combination of sodium polyacrylate and a copolymer of acrylic acid and sulfonic acid in a ratio of 3: (1-3), which helps to prepare dishwashing detergent tablets with better detergency.

[0117] Combining the test results of Example 1 and Example 8 and Table 3, it can be seen that when the anionic surfactant is selected from sodium alkyl sulfate and sodium fatty acid methyl ester sulfonate, and the mass ratio of the two is 10:0.5, the prepared detergent tablet has a slight foam when washing and cleaning for a short time; therefore, the anionic surfactant can preferably be a composite composition of sodium alkyl sulfate and sodium fatty acid methyl ester sulfonate in a ratio of 10:(1-6).

[0118] Combining the test results of Example 1 and Example 9 and Table 3, it can be seen that when the non-ionic surfactant is selected from EO-PO block polyoxyethylene ether and fatty acid methyl ester ethoxylate, the prepared detergent tablet has a small amount of use, good washing effect and less foam, but it will increase the difficulty of molding the detergent tablet to a certain extent. Therefore, the non-ionic surfactant is preferably at least one of alkyl glucoside, maltitol laurate and maltooligosaccharide glucoside polymer and any combination thereof, which is beneficial to the preparation of dishwashing detergent tablets with good molding effect, suitable for large-scale mass production, and no large amount of foam is generated during the washing process.

[0119] The specific embodiments are merely explanations of the present application and are not limitations of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments as needed, but as long as they are within the scope of the claims of the present application, they are protected by patent law.

Claims

1. A dishwashing detergent tablet, characterized in that The invention is mainly made of the following components in parts by weight: 15 to 35 parts of low molecular weight water-soluble high molecular polymer, 10 to 25 parts of anionic surfactant, 5 to 20 parts of nonionic surfactant, 0.3 to 5 parts of molding aid, 1 to 10 parts of polyol builder, 1 to 10 parts of water softener, 1 to 10 parts of anti-stain dispersant, 0.1 to 5 parts of enzyme preparation, 0.3 to 3 parts of high molecular cleaning aid, 0 to 1 part of flavor and 0 to 0.1 part of preservative.

2. A dishwashing detergent tablet according to claim 1, characterized in that: The water-soluble high molecular polymer is selected from polyvinyl alcohol and / or polyvinyl alcohol cross-linked polymer, and the average molecular weight of the water-soluble high molecular polymer is 10,000-40,000.

3. A dishwashing detergent tablet according to claim 1, characterized in that: The anionic surfactant is selected from at least one of alkyl sulfates with carbon chains between C8 and C22, alkyl polyether sulfates, fatty acid methyl ester sulfonates, fatty acid methyl ester ethoxylate sulfonates, modified oil ethoxylate sulfonates, and alcohol ether carboxylates and / or any combination thereof.

4. A dishwashing detergent tablet according to claim 3, characterized in that: The anionic surfactant is selected from at least one of sodium alkyl sulfate, potassium alkyl sulfate, sodium alkylbenzene sulfonate, sodium α-olefin sulfonate, sodium alkyl polyether sulfate, sodium fatty acid methyl ester ethoxylate sulfonate, sodium modified oil ethoxylate sulfonate, sodium fatty acid methyl ester sulfonate and / or any combination thereof.

5. A dishwashing detergent tablet according to claim 1, characterized in that: The nonionic surfactant is selected from at least one of carbon chain C6-C18 alkyl glycosides, maltitol laurate and maltooligosaccharide glucoside polymers, alcohol ether glycosides, fatty alcohol polyoxyethylene ethers, isomeric alcohol polyoxyethylene ethers, EO-PO block polyoxyethylene ethers, modified oil ethoxylates, and fatty acid methyl ester ethoxylates.

6. A dishwashing detergent tablet according to claim 5, characterized in that: The nonionic surfactant is selected from at least one of carbon chain C6-C18 alkyl glycoside, maltitol laurate and maltooligosaccharide glucoside polymer and any other combination thereof.

7. A dishwashing detergent tablet according to claim 1, characterized in that: The molding aid is selected from at least one of carboxymethyl cellulose, polyanionic cellulose, hydroxypropyl methyl cellulose and hydroxyethyl cellulose.

8. A dishwashing detergent tablet according to claim 1, characterized in that: The water softener is selected from at least one of sodium ethylenediamine di-o-phenylacetate, sodium / potassium tripolyphosphate, sodium citrate, sodium hydroxyethylidene diphosphate, tetrasodium glutamate diacetate, trisodium methylglycine diacetate, sodium iminodisuccinate, sodium polyaspartate, and sodium polyepoxysuccinate.

9. A dishwashing detergent tablet according to claim 1, characterized in that: The anti-stain dispersant is at least one selected from sodium salt of maleic acid and acrylic acid copolymer, hydrophobically modified acrylic acid polymer, acrylic acid homopolymer, copolymer of acrylic acid and sulfonic acid, and sodium / potassium polyacrylate.

10. A dishwashing detergent tablet according to claim 1, characterized in that: The enzyme preparation is selected from at least one of protease, amylase, lipase, mannanase, cellulase, pectin lyase, oxidoreductase and glycoside hydrolase.

11. A method for preparing a dishwashing detergent tablet according to any one of claims 1 to 10, characterized in that Prepared by the following method: (1) Add water to the reaction kettle, raise the temperature to 50-60°C, start homogenizing and stirring, add the water-soluble polymer, continue stirring and raise the temperature to 80-90°C until the water-soluble polymer is completely dissolved and uniformly, and stop heating; (2) adding anionic surfactant, nonionic surfactant, polyol builder, anti-stain dispersant, water softener, and polymer cleaning aid in sequence under stirring and dissolving evenly; (3) Mix the molding aid with an appropriate amount of water and add it to the reactor, stirring and dissolving evenly, and then add the remaining components in sequence and stirring and dissolving evenly to obtain a stable slurry; (4) transporting the prepared slurry to a drying device, and during the drying process, evenly distributing the solid enzyme preparation on the undried slurry, and continuing to dry until the solid enzyme preparation is completely adhered to the dried sheet; (5) demoulding and slicing to obtain dishwashing detergent tablets.

12. The method for preparing a dishwashing detergent tablet according to claim 11, characterized in that: After the prepared slurry is transported to the drying equipment, the liquid enzyme preparation is evenly attached to the dried sheet by smearing or spraying, and then cut into different sizes to obtain dishwashing detergent tablets.

13. A method for using a dishwashing detergent tablet according to any one of claims 1 to 10, characterized in that: Place dishwashing tablets in the dishwasher compartment, in the dishwasher basket, on the dishes, or next to the sink at the bottom of the dishwasher for washing; or dilute the dishwashing tablets with appropriate amount of water to different concentrations of aqueous solution and then perform conventional manual washing.

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