Detergent tablet comprising a plant polysaccharide and anionic/nonionic surfactant mixture

Abstract

Disclosed are a detergent composition, a preparation method thereof, and a dissoluble detergent tablet, which fall within the field of detergent products. A detergent composition, wherein a raw material for preparing the detergent composition includes the following components by mass percentages: anionic surfactant: 11-45%; nonionic surfactant: 1-15%; plant polysaccharide: 5-30%; shape promoting agent: 3-18%; builder: 5-20%; enzymatic preparation: 0-5%; chelating agent: 0.5-5%; essence: 0-0.5%; and a balance of water; a ratio of a total mass of the anionic surfactant and the nonionic surfactant to a mass of the plant polysaccharide is (1-7):1; and a mass ratio of the plant polysaccharide to the shape promoting agent is (0.4-9):1. The present application has the effect of providing a more environmentally friendly detergent composition, and can be applied to the fields of fabric washing, hard surface cleaning, dishwashing and the like.

Claims

1. A detergent composition, wherein a raw material for preparing the detergent composition comprises the following components by mass percentages: A) from 24-45% anionic surfactant; B) from 1-15% nonionic surfactant; C) from 10-30% of a plant polysaccharide selected from the group consisting of alginate, hydroxypropyl methylcellulose, sodium carboxymethyl cellulose, pectin, inulin, carboxymethyl starch ether, hydroxypropyl starch ether, oxidized starch, carrageenan, or mixtures thereof; D) from 3-18% of a C.sub.3-C.sub.8 polyol as a shape promoting agent; E) from 5-20% builder; F) from 0-5% enzymatic preparation; G) from 0.5-5% chelating agent; H) from 0-0.5% essence; and I) from 10.5-30% water, wherein a ratio of a total mass of the anionic surfactant and the nonionic surfactant to a mass of the plant polysaccharide is (1-7):1; and a mass ratio of the plant polysaccharide to the shape promoting agent is (0.4-9):1.

2. The detergent composition according to claim 1, wherein the anionic surfactant comprises one or more of C.sub.12-C.sub.18 fatty alcohol sulfate, C.sub.12-C.sub.14 alkyl ether sulfate, sodium C.sub.14-C.sub.16 -olefin sulfonate, or C.sub.12-C.sub.18 fatty acid methyl ester sulfonate; and the nonionic surfactant comprises one or more of fatty alcohol polyoxyethylene ether, fatty acid methyl ester ethoxylate, alkyl ethoxy polyglycosides, sophorolipid, rhamnolipid, sucrose fatty acid ester, or polyethylene glycol 7 (PEG-7) glyceryl cocoate.

3. The detergent composition according to claim 1, wherein the builder comprises one or more of plant starch, kaolin, bentonite, or silicon dioxide.

4. The detergent composition according to claim 1, wherein the chelating agent comprises one or more of citric acid and salts thereof, gluconic acid and salts thereof, tetrasodium glutamate diacetate, trisodium methylglycine diacetate, polyaspartic acid and salts thereof, or polyglutamic acid and salts thereof.

5. The detergent composition according to claim 1, wherein the raw material further comprises at least one of plant extracts or dyes.

6. A method for preparing the detergent composition according to claim 1, comprising the following steps: mixing the plant polysaccharide with the shape promoting agent under stirring to wet a solid powder of the plant polysaccharide with the shape promoting agent to obtain a premix; mixing the anionic surfactant with a pre-heated water, and after standing until completely dissolved into a homogeneous phase, adding the premix in batches under stirring to obtain a mixture; and adding the builder to the mixture, stirring until uniform, then adding the nonionic surfactant, and adding the chelating agent to adjust a value of pH to 6-8, then adding the enzymatic preparation in liquid form and remaining components, and continuing stirring to obtain the detergent composition.

7. A dissoluble detergent tablet, wherein the dissoluble detergent tablet is produced by drying and then slicing the detergent composition according to claim 1; wherein, when the enzymatic preparation in the detergent composition is in solid form, the enzymatic preparation is not added during preparation of the detergent composition, but is instead sprinkled onto sliced tablets.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a photograph of a finished product of a dissoluble detergent tablet in Application Example 1 of the present application.

(2) FIG. 2 is a photograph of a finished product of a dissoluble detergent tablet in Comparative Application Example 2 of the present application.

(3) FIG. 3 is a photograph of a finished product of a dissoluble detergent tablet in Comparative Application Example 3 of the present application.

(4) FIG. 4 is a photograph of oil leakage of the dissoluble detergent tablet in Application Example 1 of the present application.

(5) FIG. 5 is a photograph of adhesion of a dissoluble detergent tablet in Comparative Application Example 4 of the present application.

(6) FIG. 6 is a photograph of oil leakage of the dissoluble detergent tablet in Comparative Application Example 4 of the present application.

DETAILED DESCRIPTION

(7) The present application is further described in detail below with reference to FIGS. 1-6.

Example 1

(8) A detergent composition, wherein a raw material for preparing the detergent composition included the following components by mass percentages: anionic surfactant: 40%; nonionic surfactant: 12%; plant polysaccharide: 10%; shape promoting agent: 4%; builder: 6%; enzymatic preparation: 3.5%; chelating agent: 1%; essence: 0.5%; and water: 23%.

(9) Specifically, the anionic surfactant was C.sub.12 fatty alcohol sulfate; the nonionic surfactant included 6% of sophorolipid, 4% of rhamnolipid, and 2% of sucrose fatty acid ester; the plant polysaccharide was alginate; the shape promoting agent was propylene glycol; the builder was kaolin; the enzymatic preparation was in liquid form and included 0.5% of protease, 0.5% of amylase, 0.5% of cellulase, 0.5% of pectinase, 0.5% of mannanase, 0.5% of lipase phospholipase, and 0.5% of phospholipase; and the chelating agent was sodium polyglutamate.

(10) A method for preparing a detergent composition, which included the following steps: the plant polysaccharide was mixed with the shape promoting agent under stirring to wet a solid powder of the plant polysaccharide with the shape promoting agent to obtain a premix; the anionic surfactant was mixed with thr water at 50 C. (+5 C. constant temperature control), after standing until completely dissolved into a homogeneous phase, a resulting mixture was transferred to a blender, then the premix was added in batches and stirred at a rotating speed of 1050 r/min for 15 minutes, so that the plant polysaccharide absorbed water sufficiently and swelled to obtain a mixture, wherein the viscosity of the mixture was controlled to be 100005000 mpa.Math.S; and the builder was added to the mixture and stirred until uniform; after the mixture turned from pale yellow to pure white, then the nonionic surfactant was added; the chelating agent was added to adjust a value of pH to 6-8; then the enzymatic preparation and the essence were added; and stirring was continued to obtain the detergent composition.

Examples 2 to 15

(11) The difference between Examples 2 to 15 of the detergent compositions and Example 1 lies in that the raw materials for preparing the detergent compositions are different, and the specific raw materials are as shown in Tables 1 and 2.

(12) TABLE-US-00001 TABLE 1 Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Mass percentage/% ple 1 ple 2 ple 3 ple 4 ple 5 ple 6 ple 7 ple 8 Plant Alginate 10 20 polysaccharide Hydroxypropyl methylcellulose Sodium 25 carboxymethyl- cellulose Pectin 15 Inulin 6 Carboxymethyl 22 starch ether Oxidized starch 25 Carrageenan 18 Hydroxypropyl starch ether Anionic C.sub.12C.sub.18 fatty 40 30 13 20 7 32 surfacant alcohol sulfate C.sub.12C.sub.14 alkyl ether 26 13 6 sulfate Sodium C.sub.14C.sub.16 34 12 6 -olefin sulfonate C.sub.12C.sub.18 fatty acid 6 5 methyl ester sulfonate Nonionic Fatty alcohol 4 3 2 5 surfactant polyoxyethylene ether Fatty acid methyl ester ethoxylate Alkyl ethoxy 6 3 4 1 polyglycosides Sophorolipid 6 4 Rhamnolipid 4 3 Sucrose fatty acid 2 2 ester PEG-7 glyceryl 3 4 cocoate Builder Plant starch 10 3 5 11 Kaolin 6 3 7 2 Silica 18 2 8 Bentonite 15 2 8 5 Shape Propylene glycol 4 5 promoting Glycerol 5 7 agent Butandiol 5 6 Hexanediol 6 Pentanediol 4 Heptanediol 10 Octanediol 11 Enzymatic Protease 0.5 0.50 0.5 0.5 0.5 preparation Amylase 0.5 0.5 Cellulase 0.5 Pectinase 0.5 0.5 0.5 Mannanase 0.5 Lipase 0.5 0.5 0.5 0.5 0.5 Phosphodiesterase 0.5 0.5 0.5 0.5 0.5 Chelating Sodium citrate 1 0.5 agent Sodium gluconate 1 0.5 Tetrasodium 0.5 0.5 glutamate diacetate Polyaspartic acid 2 0.5 1 and salts thereof Sodium 1 polyglutamate Essence 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Sapindus mukorossi extract Water 23 24 16.5 17 30 11 20.5 20 Total 100 100 100 100 100 100 100 100 Total surfactant: plant 5.2 6.67 1.36 3 1.5 2 1 2 polysaccharide Plant polysaccharide: shape 2.50 0.40 6.25 2.50 2.86 2.20 2.27 3 promoting agent

(13) TABLE-US-00002 TABLE 2 Exam- Exam- Exam- Exam- Exam- Exam- Exam- Mass percentage/% ple 9 ple 10 ple 11 ple 12 ple 13 ple 14 ple 15 Plant Alginate 5 10 3 10 polysaccharide Hydroxypropyl 11 2 methylcellulose Sodium 5 3 5 30 carboxymethyl- cellulose Pectin 1 Inulin 1 Carboxymethyl starch 2 3 3 ether Oxidized starch 2 Carrageenan 2 Hydroxypropyl starch 7 1 ether Anionic C.sub.12C.sub.18 fatty alcohol 15 9 30 3 45 surfacant sulfate C.sub.12C.sub.14 alkyl ether 14 35 10 3 sulfate Sodium C.sub.14C.sub.16 18 11 5 -olefin sulfonate C.sub.12C.sub.18 fatty acid 16 methyl ester sulfonate Nonionic Fatty alcohol 4 surfactant polyoxyethylene ether Fatty acid methyl 3 ester ethoxylate alkyl ethoxy 7 15 polyglycosides Sophorolipid 7.5 6 Rhamnolipid 5 4 Sucrose fatty acid 3.6 ester PEG-7 glyceryl cocoate Builder Plant starch 5 15 20 Kaolin 1 5 6 Silica 1 2 3 5 Bentonite 4 7 Shape Propylene glycol promoting Glycerol 8 2 5 2 6 6 3.5 agent Butandiol 4 6 Hexanediol 1 6 Pentanediol 1 4 Heptanediol 3 Octanediol 1 Enzymatic Protease 0.5 0.5 0.5 1 0.5 preparation Amylase 1 Cellulase 0.5 Pectinase 1 Mannanase 0.5 Lipase 0.5 0.5 1 Phosphodiesterase 0.5 0.5 0.5 Chelating Sodium citrate 1.5 0.5 1 agent Sodium gluconate Tetrasodium 1 0.50 2 0.5 glutamate diacetate Polyaspartic acid and 0.5 2 salts thereof Sodium 1 1 polyglutamate Essence 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Sapindus mukorossi extract 0.5 Water 30 27 21.5 26.9 19.5 32 10.5 Total 100 100 100 100 100 100 100 Total surfactant: plant 2.71 2.5 2.81 2.1 4 5.2 1.63 polysaccharide Plant polysaccharide: shape 1.75 2.50 2.67 2.29 0.55 0.5 8.57 promoting agent

(14) The sodium C.sub.12-C.sub.14 -olefin sulfonate in Example 2, Example 5, and Example 7 was specifically sodium C.sub.12 -olefin sulfonate; the sodium C.sub.12-C.sub.14 -olefin sulfonate in Example 9, Example 12, and Example 14 was specifically sodium C.sub.14 alpha-olefin sulfonate; the C.sub.12-C.sub.18 fatty 5 alcohol sulfate in Example 3, Example 5, Example 9, and Examples 12-15 was specifically sodium C.sub.12 fatty alcohol sulfate; the C.sub.12-C.sub.18 fatty alcohol sulfate in Examples 6 to 8 was specifically sodium C.sub.18 fatty alcohol sulfate; the C.sub.12-C.sub.14 alkyl ether sulfate in Example 4, Examples 10 to 12 was specifically sodium C.sub.12 alkyl ether sulfate; the C.sub.12-C.sub.14 alkyl ether sulfate in Examples 6 and 7 and Example 14 was specifically sodium C.sub.14 alkyl ether sulfate; the C.sub.12-C.sub.18 fatty acid methyl ester sulfonate in Example 4 and Example 7 was specifically sodium C.sub.12 fatty alcohol sulfate; the C.sub.12-C.sub.18 fatty acid methyl ester sulfonate in Example 10 was specifically sodium C.sub.12 fatty alcohol sulfate.

Comparative Example 1

(15) The difference between this comparative example and Example 1 lies in that the raw material for preparing the detergent composition is different, and the details are as follows: the mass percentage of the kaolin was 16%, and the addition amount of the plant polysaccharide was 0.

Comparative Example 2

(16) The difference between this comparative example and Example 1 lies in that the raw material for preparing the detergent composition is different, and the details are as follows: the addition amount of kaolin was 0, and the mass percentage of the plant polysaccharide was 16%.

Comparative Example 3

(17) The difference between this comparative example and Example 2 lies in that the raw material for preparing the detergent composition is different, and the details are as follows: the sodium C.sub.14 -olefin sulfonate accounted for 42% and the water accounted for 16%, so that the ratio of the total mass of the anionic surfactant and the nonionic surfactant to the mass of the plant polysaccharide was 8:1.

Comparative Example 4

(18) The difference between this comparative example and Example 1 lies in that the raw material for preparing the detergent composition is different, and the details are as follows: the addition amount of the propylene glycol was 1%, the addition amount of the water was 26%, and the mass ratio of the plant polysaccharide to the shape promoting agent was 10:1.

Comparative Example 5

(19) The difference between this comparative example and Example 2 lies in that the raw material for preparing the detergent composition is different, and the details are as follows:

(20) Hexanediol was further added in an amount of 1%, the water was added in an amount of 23%, and the mass ratio of the plant polysaccharide to the shape promoting agent was 0.375:1.

Comparative Example 6

(21) The difference between this Comparative Example and Example 5 lies in that the raw material and method for preparing the detergent composition are different, and the details are as follows:

(22) Raw material: the addition amount of plant polysaccharide was 0, and polyvinyl alcohol was newly added, and the mass percentage of polyvinyl alcohol was 20%.

(23) Preparation method: the polyvinyl alcohol was mixed with the water at 90 C. until the polyvinyl alcohol swelled and fully dissolved; the chelating agent, the anionic surfactant, and the nonionic surfactant were added and dissolved for 60 min; and the shape promoting agent, the builder, the enzymatic preparation and the essence were added to obtain a slurry, thus preparing the detergent composition.

Application Example 1

(24) A dissoluble detergent tablet produced by drying and then slicing the detergent composition prepared in Example 1.

(25) The drying methods include a casting method and a drum method.

(26) The casting method: the slurry is cast and then formed through air-blowing drying equipment.

(27) The drum method: the slurry is placed on a drum, where rolling spreads the slurry, and heating on the drum facilitates formation.

(28) The preparation of the detergent tablet was carried out in particular by the casting method in this application example.

Application Examples 2 to 15

(29) The difference between Application Examples 2 to 15 of the dissoluble detergent tablets and Application Example 1 lies in that the dissoluble detergent tablets of Application Examples 2 to 15 were respectively produced by drying and then slicing the detergent compositions prepared in Examples 2 to 15.

(30) The dissoluble detergent tablets prepared in Application Examples 1-15 exhibited complete formation without powder shedding or fragility. Taking the dissoluble detergent tablet of Application Example 1 as an example (as shown in FIG. 1), the dissoluble detergent tablet presented macroscopically visible foam cells that facilitated dissolution. In alternative embodiments, Application Examples 1-15 used the drum method to prepare the dissoluble detergent tablets, which similarly obtained fully-formed tablets without powder shedding or fragility.

Comparative Application Example 1-Comparative Application Example 6

(31) The difference between Comparative Application Examples 1 to 6 of the dissoluble detergent tablets and Application Example 1 lies in that the dissoluble detergent tablets of Comparative Application Examples 1 to 6 were respectively produced by drying and then slicing the detergent compositions prepared in Comparative Examples 1 to 6.

(32) The dissoluble detergent tablet prepared in Comparative Application Example 1 failed to form a tablet; the dissoluble detergent tablet prepared in Comparative Application Example 2 was dry and brittle, as shown in FIG. 2. The dissoluble detergent tablet prepared in Comparative Application Example 3 was not formed, and the plant polysaccharide was delaminated with other substances, as shown in FIG. 3. The test for Comparative Application Example 3 below was conducted by taking the chips with better quality. The dissoluble detergent tablet prepared in Comparative Application Example 4 was de-pulverized. The dissoluble detergent tablet prepared in Comparative Application Example 5 was brittle and de-pulverized.

(33) The dissoluble detergent tablet prepared in Comparative Application Example 6 can be normally formed, but the addition of polyvinyl alcohol may bring about ecological risks such as microplastics, etc. Moreover, the polyvinyl alcohol needs to be dissolved at a high temperature of 85 C. or higher during the preparation process, which consumes a large amount of energy.

(34) Performance Test

(35) The dissoluble detergent tablets prepared in the Application Examples and Comparative Application Examples were subjected to the following tests.

(36) 1. Stain-Removing Test

(37) {circle around (1)} Fabric stain-removing test: The detergency is determined according to GB/T 13174-2021 Determination of detergency and cycle of washing property for laundry detergents, the washing water is 250 mg/kg CaCl.sub.2) hard water, the test cloth is national standard carbon black JB-01 dirty cloth, national standard protein JB-02 dirty cloth and national standard sebum JB-03 dirty cloth. The stain-removing ratio (Pi) was determined at a sample concentration of 0.05%, with a 0.2% standard liquid detergent as a control, wherein when Pi1.0 was qualified, Pi<1.0 was unqualified. {circle around (2)} Kitchen grease removal test: The test was conducted according to GB/T 35833-2018 Cleaner for kitchen stains and grease, a 3% sample solution was prepared. {circle around (3)} Hard floor stain-removing test: The test was conducted according to QB/T4532-2013 Hard Floor Cleaner, a 0.5% sample solution was prepared. {circle around (4)} Household dishwasher cleaning test: 22 pieces of tableware (including porcelain bowls/plates, plastic bowls, stainless steel bowls/plates/cups/chopsticks/spoons, etc.) were prepared in advance, approximately 20 g of mixed grease stains was weighed, the grease stains was evenly applied to the test tableware and then washed; preparation of mixed grease stains: the red wine, cooking oil, chili sauce, tomato sauce, peanut butter, fruit jam, salad dressing, butter, light cream, barbecue sauce, condensed milk, cheese, chocolate, chili oil, soy sauce, wasabi, and sesame oil were thoroughly mixed and set aside; preparation of coffee stains/red wine stains/fruit juice stains/tea stains: the staining solution was poured into ceramic/glass cups (until completely filled), placed in an 80 C. oven, 10 mL of the staining solution was extracted every 10 minutes, the operation was repeated until 5 dried stain marks were formed, then the ceramic/glass cups were removed and cooled to room temperature for 3 days of aging.

(38) One 4 g detergent tablet sample was placed in the designated dispenser compartment of the dishwasher and the washing cycle was conducted using the normal mode (59 minutes), then the post-wash cleanliness was observed.

(39) The fabric stain-removing test results are as shown in Table 3; the kitchen grease removal, hard floor stain-removing, and dishwasher stain-removing test results are as shown in Table 4.

(40) TABLE-US-00003 TABLE 3 National standard National National carbon standard standard General Stain-removing ratio black protein sebum stain- (Comparison with soiled soiled soiled remo standard solution) fabric fabric fabric ving Application Example 1 1.34 1.68 1.66 4.68 Application Example 2 1.03 1.60 1.68 4.11 Application Example 5 1.56 1.55 1.71 4.82 Comparative Application 0.78 1.38 1.48 3.64 Example 2 Comparative Application 0.86 1.37 1.46 3.69 Example 3 Comparative Application 0.89 1.35 1.46 3.70 Example 4 Comparative Application 0.74 1.35 1.04 3.13 Example 5 Comparative Application 1.13 1.52 1.18 3.83 Example 6

(41) TABLE-US-00004 TABLE 4 Kitchen Hard floor Dishwasher grease stain- stain- removal removing removing rate (%) rate (%) efficiency (%) Application Example 1 92.2 96.7 92 Application Example 2 97.4 96.6 95 Application Example 3 97.1 96.7 96 Application Example 4 97.9 96.8 96 Application Example 5 98.3 98.6 95 Application Example 6 92.8 98.4 94 Application Example 7 96.9 97.6 93 Application Example 8 97.0 98.5 92 Application Example 9 97.3 98.5 93 Application Example 10 98.6 98.6 94 Application Example 11 98.5 97.8 93 Application Example 12 98.7 98.2 92 Application Example 13 98.3 98.5 94 Application Example 14 92.7 97.6 94 Application Example 15 95.8 97.9 92 Comparative Failing to form an intact tablet Application Example 1 Comparative 76.1 83.5 84 Application Example 2 Comparative 75.4 88.9 88 Application Example 3 Comparative 77.9 87.2 86 Application Example 4 Comparative 70.8 79.8 82 Application Example 5

(42) It can be seen that in the present application, using the plant polysaccharide as a film-forming agent instead of polyvinyl alcohol, and combining the surfactant in a suitable proportion can ensure that the detergent tablet is environmentally friendly and formed completely, and also has a good stain-removing capability, and can deal with stains in various scenes.

(43) 2. High-Temperature High-Humidity Test

(44) The test was conducted according to QB/T5779-2023 Laundry Tablets, samples of better quality were selected and packed in paper boxes (with detergent tablets stacked vertically inside and a white cardboard placed at the bottom), then placed under three test conditions: room temperature, 452 C., and 402 C. with relative humidity of 705% RH, four replicate groups were prepared for each condition, after 48 hours of testing, one group was taken out from each condition and the two detergent tablets were separated to observe whether there is any adhesion between tablets or oil seepage phenomenon, and the test results are as shown in Table 5.

(45) The oil seepage of Application Example 1 is as shown in FIG. 4, the adhesion of Comparative Application Example 4 is as shown in FIG. 5 and the oil seepage of Comparative Application Example 4 is as shown in FIG. 6.

(46) TABLE-US-00005 TABLE 5 Results Application Example 1 All three test conditions showed no adhesion and no oil seepage Application Example 2 All three test conditions showed no adhesion and no oil seepage Application Example 5 All three test conditions showed no adhesion and no oil seepage Comparative Application Room temperature: no oil Example 2 seepage; 45 C.: oil seepage and adhesion; 40 C./70% RH: severe oil seepage, tablets adhered to cardboard and could not be separated Comparative Application Room temperature: oil seepage; Example 4 45 C. and 40 C./70% RH: severe adhesion Comparative Application Room temperature: oil seepage; Example 5 45 C. and 40 C./70% RH: severe adhesion Comparative Room temperature: no oil seepage; Application 45 C.: oil seepage and no Example 6 adhesion; 40 C./70% RH: tablets adhered to cardboard
3. Water Solubility Test

(47) A 1 L beaker filled with 700 mL hard water (250 mg/kg calcium chloride) was placed in a 152 C. water bath, magnetic stirring speed was adjusted, and samples were cut into 3 cm3 cm squares, vertically dropped from 10 cm above the water surface parallel to the water. Timing began upon water contact of the samples and ceased upon complete dispersion, recording dissolution time. Tests were repeated 3 times in parallel. The results are recorded in the table. In addition, a 250 ml beaker containing 200 mL of hard water (calcium chloride) was placed in a 252 C. water bath, the samples were cut into 3 cm3 cm squares, vertically dropped from 10 cm above the water surface parallel to the water. The dissolution process of the samples was observed statically without stirring.

(48) Foam test: 2 kg of garments was prepared and placed in a drum washing machine together with one 4 g detergent tablet sample, the washing machine was set to a 39-minute cycle with water temperature maintained at 252 C., the foam conditions were observed and recorded 5 minutes after the washing cycle begins.

(49) In the foam test, the detergent tablets from Application Example 5 and Comparative Example 6 were used for comparison. The washing results indicate that Application Example 5 produced less foam, while Comparative Example 6 showed significantly more foam.

(50) 4. Washing Residue Test for Washing Machine

(51) Five garments of different materials were prepared, one 4 g detergent tablet sample was placed in each garment or hem and secured with rubber bands, then the garments were wrapped in white fabric (three garments per fabric), and washed in a 39-minute machine cycle, then inspected for residues.

(52) The results of the water dissolution test and the washing residue test for the washing machine are as shown in Table 6.

(53) TABLE-US-00006 TABLE 6 Washing residue condition for washing machine Dissolution time Application Example 1 None 84.81 seconds Application Example 2 None 76.22 seconds Application Example 3 None 87.60 seconds Application Example 4 None 78.11 seconds Application Example 5 None 82.22 seconds Application Example 6 None 77.60 seconds Application Example 7 None 90.92 seconds Application Example 8 None 88.95 seconds Application Example 9 None 86.17 seconds Application Example 10 None 70.84 seconds Application Example 11 None 71.87 seconds Application Example 12 None 83.02 seconds Application Example 13 None 83.20 seconds Application Example 14 None 85.48 seconds Application Example 15 None 79.34 seconds Comparative Application Failing to form an intact tablet Example 1 Comparative Application Present >3 minutes Example 2 Comparative Application Present 15 minutes Example 3 undissolved Comparative Application Present 2 minutes and Example 4 9.59 seconds Comparative Application Present 15 minutes Example 5 undissolved

(54) It can be seen that the detergent tablet obtained in the present application has good water solubility, has an obvious defoaming effect during use, and has a small washing residue.

(55) 5. Biodegradation Test

(56) The test was conducted according to the method in Appendix A of Test Method for Biodegradability of Surfactants (GB/T 15818-2018).

(57) 6. Biobased Content Test

(58) Test requirements: The test conducted in compliance with ISO/IEC 17025:2017 testing and certification standards (PJLA #59423).

(59) Test results for the biodegradation and bio-based content are shown in Table 7.

(60) TABLE-US-00007 TABLE 7 7-day biodegradation Biobased rate (%) content/% Application Example 5 99 70.07 Comparative Application 90 34.77 Example 6

(61) Based on the above test results, it can be seen that the detergent compositions prepared in the examples have good detergent tablet forming effect, strong stain-removing capability, adaptability to various stains and environment, rapid dissolution and no residue, and there is a significant improvement in biodegradability and environmental protection by using bio-based plant polysaccharides instead of petroleum-based polyvinyl alcohol.

(62) This specific embodiment is provided solely for explaining the present application and shall not be construed as limiting the present application. Any person skilled in the art may, after reading this specification, make modifications to this specific embodiment as needed without creative contribution, provided that such modifications fall within the scope of the claims of the present application and shall be protected under patent law.