CN106916659B

CN106916659B - Multilayer laundry tablet and preparation method thereof

Info

Publication number: CN106916659B
Application number: CN201710059965.1A
Authority: CN
Inventors: 张蕾; 胡征宇; 任江; 何成; 王权威
Original assignee: Nice Zhejiang Technology Co ltd; Nice Group Co Ltd
Current assignee: Nice Zhejiang Technology Co ltd; Nice Group Co Ltd
Priority date: 2017-01-24
Filing date: 2017-01-24
Publication date: 2020-05-12
Anticipated expiration: 2037-01-24
Also published as: CN106916659A

Abstract

The application discloses a multilayer laundry tablet and a preparation method thereof, the multilayer laundry tablet comprises two or more layers of laundry tablet single sheets, and substances for bonding are contained between the two or more layers of laundry tablet single sheets, wherein the substances for bonding are selected from one or more of liquid biological enzyme, liquid spice, liquid softening agent, liquid color fixative and liquid antibacterial agent; the method comprises the following steps: coating or spraying a bonding material on the surface of the single laundry piece, and bonding and pressing two or more layers of the single laundry pieces coated with the bonding material together. The multilayer laundry tablet has the advantages of good stability, high cleaning power, no problem of insoluble substance deposition on clothes in the using process, and simple preparation process.

Description

Multilayer laundry tablet and preparation method thereof

Technical Field

The application relates to but is not limited to the technical field of daily chemical washing, in particular to but not limited to a multilayer laundry detergent and a preparation method thereof.

Background

In China, along with the improvement of the living standard of people, the requirements of consumers on washing products are higher and higher, and particularly, the requirements on convenience, high cleaning ability, safety, environmental protection and the like of the washing products are pursued. The laundry tablets are a novel detergent, and are favored by some consumers due to the advantages of being super-concentrated, fast in dissolving, not injuring hands, convenient to use and the like.

Laundry tablets have many advantages, but are not ideal in terms of detergency, which is a concern to consumers, mainly due to the fact that laundry tablets do not contain a detergent enzyme preparation or the enzyme preparation has poor stability. At present, most of the market laundry tablets do not contain enzyme, so that the laundry tablets are difficult to remove cleanly when encountering stains such as protein, grease and the like in actual washing. In addition, enzymes are mostly added into slurry in a few enzyme-containing laundry tablets, the enzymes are easy to inactivate when meeting high temperature during batching and drying, and the enzyme-containing laundry tablets are easy to be affected by the environment due to the fact that the enzymes are exposed in the air, and are easy to inactivate when meeting high temperature, humidity, peracid and over-alkali environments. Therefore, the conventional enzyme-containing laundry tablets have poor stability and are difficult to exhibit high detergency.

In addition, the softening agent, the color protection agent and the antibacterial agent are added into the laundry sheet, so that the washing performance of the laundry sheet can be better improved, the laundry is soft and bright in color and has no peculiar smell, the laundry is better cared, and more laundry requirements of consumers are met. However, most of softening agents, color fixatives and antibacterial agents are unstable and easily lose their effects in environments such as high temperature and over-acid and over-alkali environments, and are difficult to exert their effects during washing.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The application provides a multi-layer laundry tablet with good stability and high detergency and a preparation method thereof.

Specifically, the multi-layer laundry tablet comprises two or more laundry tablet single pieces, wherein substances for bonding are contained between the two or more laundry tablet single pieces, and the substances for bonding are selected from one or more of liquid biological enzyme, liquid spice, liquid softening agent, liquid color fixative and liquid antibacterial agent.

In embodiments of the present application, the composition of the laundry tablet pieces may be different.

In the embodiments of the present application, the substances for adhesion contained between the individual pieces of the laundry tablet may be the same or different.

In embodiments of the present application, the liquid biological enzyme may be selected from one or more of a liquid protease, a liquid lipase, a liquid amylase, a liquid cellulase, a liquid mannanase, a pectinase, a cutinase.

In embodiments of the present application, the liquid softener may be selected from one or more of a cationic softener, an anionic softener, a nonionic softener, an amphoteric quaternary ammonium salt softener, and a silicone softener.

Optionally, the liquid softening agent is selected from one or more of quaternary ammonium salt type cationic softening agent, sodium stearyl succinate ester sulfonate, polyoxyethylene ester, amino modified silicone, polyether type hydrophilic silicone and dimethyl silicon.

In embodiments of the present application, the liquid color fixative may be selected from one or more of a cationic color fixative, a non-ionic color fixative.

Optionally, the liquid color fixative is selected from one or more of imidazoline type cationic color fixative, cationic cellulose, nonionic color fixative HP66K, quaternary ammonium salt type cationic color fixative.

In an embodiment of the present application, the liquid antibacterial agent may be one or more selected from a nano-silver antibacterial agent, an imidazole antibacterial agent, a thiazole antibacterial agent, and a quaternary ammonium salt antibacterial agent.

In an embodiment of the present application, the multilayer laundry tablet does not contain a shaping aid.

Optionally, the forming aid is selected from one or more of starch, kaolin, silicon dioxide, bentonite and talcum powder.

In the embodiments of the present application, the laundry sheet pieces may contain one or more of a perfume, a softening agent, a color fixative, and an antibacterial agent.

In the embodiment of the present application, the flavor, softening agent, color fixative, and antibacterial agent in the single piece of laundry tablet may be in liquid form or solid form.

In embodiments of the present application, the multi-layer laundry tablets may contain the following components:

the liquid biological enzyme, the liquid softening agent, the liquid color fixative and the liquid antibacterial agent are positioned among the washing piece single pieces and are used for bonding the washing piece single pieces.

In embodiments herein, the weight ratio of the film former to the total surfactant may be from 1:1 to 1: 5.5.

In an embodiment of the present application, the anionic surfactant may be selected from one or more of alkyl benzene sulfonate, alkyl sulfonate, lauryl alcohol sulfate, fatty alcohol polyoxyethylene ether sulfate, α -olefin sulfonate, fatty acid methyl ester sulfonate, and fatty acid salt.

Optionally, the anionic surfactant is selected from one or more of sodium alkyl benzene sulfonate, sodium lauryl sulfate, sodium fatty alcohol-polyoxyethylene ether sulfate, α -olefin sodium sulfonate and sodium fatty acid methyl ester sulfonate.

In embodiments herein, the nonionic surfactant may be selected from one or more of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, fatty acid methyl ester ethoxylate, alkyl alcohol amide, alkyl glycoside.

Optionally, the nonionic surfactant is selected from one or more of fatty acid diethanolamide and fatty alcohol-polyoxyethylene ether.

In embodiments herein, the humectant may be selected from one or more of propylene glycol, glycerin, isopropanol, mannitol.

In embodiments of the present application, the chelating agent may be selected from one or more of sodium citrate, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, sodium hydroxyethylidene diphosphate, sodium diethylenetriaminepentaacetate.

In the embodiments of the present application, the film forming agent may be selected from one or more of polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol 800-;

in an embodiment of the present application, the release agent may be selected from one or more of white oil, silicone oil, methyl silicone oil, paraffin.

In embodiments of the present application, the multi-layer laundry tablets may further comprise 0-5 parts by weight of a preservative, 0-5 parts by weight of a coloring agent, 0-5 parts by weight of a liquid flavor, or a combination thereof.

The present application also provides a method of making a multi-layer laundry tablet as described above, the method comprising: coating or spraying a bonding material on the surface of the single laundry piece, and bonding and pressing two or more layers of the single laundry pieces coated with the bonding material together.

In an embodiment of the present application, the method may include: dissolving a film forming agent in water, sequentially adding an anionic surfactant, a nonionic surfactant, a wetting agent, a chelating agent, a release agent, optionally an antiseptic and a pigment, and uniformly stirring to obtain slurry; drying the slurry to obtain single pieces of the laundry pieces; coating or spraying liquid biological enzyme, optionally coating or spraying liquid perfume, liquid softening agent, liquid color fixative, and liquid antibacterial agent on the surface of the single piece of the laundry piece; and adhering and pressing the coated or sprayed two or more layers of the single laundry pieces together.

In an embodiment of the present application, the method may include: dissolving a film forming agent in water, sequentially adding an anionic surfactant, a nonionic surfactant, a wetting agent, a chelating agent, a release agent, and optionally adding a preservative, a pigment, a perfume, a softener, a color fixative and an antibacterial agent, and uniformly stirring to obtain slurry; drying the slurry to obtain single pieces of the laundry pieces; coating or spraying liquid biological enzyme, optionally coating or spraying liquid perfume, liquid softening agent, liquid color fixative, and liquid antibacterial agent on the surface of the single piece of the laundry piece; and adhering and pressing the coated or sprayed two or more layers of the single laundry pieces together.

In embodiments of the present application, the film forming agent may be pre-dissolved in the water with stirring for 30-60min, and the pre-dissolving temperature may be 60-80 ℃.

In the embodiment of the application, the preparation of the slurry can be carried out at 60-80 ℃, and the stirring time for preparing the slurry can be 30-60 min;

in embodiments of the present application, the temperature of the drying may be 60 to 120 ℃.

This application has avoided enzyme and external environment's direct contact through wrapping up liquid bio-enzyme inside the laundry piece, has protected liquid bio-enzyme's activity furthest, has greatly promoted the washing effect of laundry piece. Meanwhile, the spice, the color fixative, the softening agent and the antibacterial agent can be wrapped inside the laundry pieces, so that the stability of the substances is improved, and the washing performance of the laundry pieces is improved.

In addition, most of the current laundry tablets contain insoluble substances such as corn starch, talcum powder, kaolin, silicon dioxide and the like, the water solution obtained by dissolving the laundry tablets is turbid, the insoluble substances can be deposited on the surface of the fabric in the washing process, the washing effect is influenced, and the clothes are yellow and hard after a long time, so that the hand feeling and the attractiveness are influenced. However, these insoluble substances are often used as a molding aid for laundry tablets, and in actual production, without these molding aids, laundry tablets are difficult to mold and have poor moisture absorption resistance. The multilayer laundry piece can be well formed by controlling the proportion of the components in the laundry piece and the adding sequence of the components during the preparation of the laundry piece without using the insoluble forming auxiliary agent, the moisture absorption resistance of the laundry piece is good, the obtained laundry piece belongs to a complete clear water piece, and an aqueous solution obtained after dissolution is clear, so that the problem of deposition of insoluble substances in the laundry piece on clothes is fundamentally solved.

When the method is used for preparing the multilayer laundry pieces, the existing laundry piece preparation process is not required to be changed, and only equipment for coating or spraying biological enzyme, spice, color fixative, softening agent and antibacterial agent and bonding equipment are required to be added behind a laundry piece preparation device, so that the cost for improving the process is saved.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof.

Detailed Description

Hereinafter, embodiments of the present application will be described in detail to make objects, technical solutions and advantages of the present application more apparent. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The raw materials and reagents used in the following examples are all common commercial products, and the contents thereof are 100%, and there is no particular requirement for pigments and perfumes.

Example 1

The formulation of the multi-layer laundry tablets of this example is shown in table 1.

TABLE 1

Components	Mass, g
		Deionized water	56
Polyvinyl alcohol	9
		Sodium dodecyl benzene sulfonate	12
AOS (α -olefin sodium sulfonate)	9
		AEO9 (fatty alcohol polyoxyethylene ether)	4
Citric acid sodium salt	4
		Glycerol	3.3
White oil	2
		Liquid protease	0.2
Liquid amylase	0.2
		Liquid fragrance	0.2
Pigment	0.1

Adding 9g of polyvinyl alcohol and 56g of deionized water into a batching pot, stirring and pre-dissolving for 30min, and controlling the temperature at 60 ℃ until the polyvinyl alcohol and the deionized water are completely dissolved; adding 12g of sodium dodecyl benzene sulfonate, 9g of AOS, 4g of AEO9, 3.3g of glycerol, 4g of sodium citrate, 2g of white oil and 0.1g of pigment into a mixing pot, controlling the temperature of the mixing pot at 80 ℃, and stirring for 50min to obtain uniform slurry; transferring the slurry to a drying cylinder at 80 ℃, and drying to prepare about 10 pieces of single laundry pieces with about 4 g; taking 2 single laundry tablets, and smearing or spraying a mixed solution of about 0.02g of liquid protease and about 0.02g of liquid amylase and about 0.02g of liquid perfume on the surface of each single laundry tablet; and (3) using a bonding machine to bond and squeeze the 2 laundry pieces together, and then shearing, stamping and packaging to prepare the multilayer laundry piece.

Example 2

The formulation of the multi-layer laundry tablets of this example is shown in table 2.

TABLE 2

Components	Mass, g
		Deionized water	50
Polyvinyl alcohol	10
		Sodium dodecyl benzene sulfonate	8
Sodium lauryl sulfate	15
		AEO9 (fatty alcohol polyoxyethylene ether)	6
Ethylenediaminetetraacetic acid diSodium salt	5
		Propylene glycol	2.3
White oil	3
		Liquid protease	0.2
Liquid cellulase	0.2
		Liquid fragrance	0.2
Pigment	0.1

Adding 10g of polyvinyl alcohol and 50g of deionized water into a batching pot, stirring and pre-dissolving for 40min, and controlling the temperature at 65 ℃ until the polyvinyl alcohol and the deionized water are completely dissolved; adding 8g of sodium dodecyl benzene sulfonate, 15g of sodium lauryl sulfate, 6g of AEO9, 2.3g of propylene glycol, 5g of disodium ethylene diamine tetraacetate, 3g of white oil and 0.1g of pigment into a mixing pot, controlling the temperature of the mixing pot at 70 ℃, and stirring for 45min to obtain uniform slurry; transferring the slurry to a drying cylinder at 85 ℃, and drying to prepare about 10 pieces of single laundry pieces with about 4 g; taking 3 pieces of single laundry pieces, respectively coating or spraying a mixed solution of about 0.02g of liquid protease and about 0.02g of liquid cellulase and about 0.02g of liquid perfume on the surface of each piece of laundry pieces (note: a mode of coating or spraying liquid enzyme on the surface of a part of the single laundry pieces, coating or spraying liquid perfume on the surface of a part of the single laundry pieces, and coating or spraying liquid enzyme and liquid perfume on the surface of the rest of the single laundry pieces, or a mode of coating or spraying liquid enzyme on the surface of a part of the single laundry pieces and coating or spraying liquid perfume on the surface of the rest of the single laundry pieces); and (3) using a bonding machine to bond and squeeze the 3 laundry pieces together, and then shearing, stamping and packaging to prepare the multilayer laundry piece.

Example 3

The formulation of the multi-layer laundry tablets of this example is shown in table 3.

TABLE 3

Components	Mass, g
		Deionized water	50
Polyvinyl alcohol	8
		Polyvinylpyrrolidone	3
Sodium lauryl sulfate	15
		AES (fatty alcohol polyoxyethylene ether sodium sulfate)	8
6501 (coconut fatty acid diethanolamide)	5
		Citric acid sodium salt	5
Isopropanol (I-propanol)	2.3
		White oil	3
Liquid protease	0.3
		Liquid fragrance	0.3
Pigment	0.1

Adding 8g of polyvinyl alcohol, 3g of polyvinylpyrrolidone and 50g of deionized water into a batching pot, stirring and pre-dissolving for 50min, and controlling the temperature at 70 ℃ until the polyvinyl alcohol, the polyvinylpyrrolidone and the deionized water are completely dissolved; adding 15g of sodium lauryl sulfate, 8g of AES, 5g of 6501, 2.3g of isopropanol, 5g of sodium citrate, 3g of white oil and 0.1g of pigment into a mixing pot, controlling the temperature of the mixing pot at 70 ℃, and stirring for 40min to obtain uniform slurry; transferring the slurry to a drying cylinder at 90 ℃, and drying to prepare about 10 pieces of single laundry pieces with about 4 g; taking 4 single laundry tablets, and smearing or spraying about 0.03g of liquid protease and about 0.03g of liquid perfume on the surface of each single laundry tablet; and (3) using a bonding machine to bond and press the 4 laundry pieces together, and then shearing, stamping and packaging to prepare the multilayer laundry piece.

Example 4

The formulation of the multi-layer laundry tablets of this example is shown in table 4.

TABLE 4

Components	Mass, g
		Deionized water	48
Polyvinyl alcohol	8
		Polyvinylpyrrolidone	3
Sodium lauryl sulfate	20.1
		AES (fatty alcohol polyoxyethylene ether sodium sulfate)	10
6501 (coconut fatty acid diethanolamide)	5
		AEO9 (fatty alcohol polyoxyethylene ether)	3
Amino silicone oil (softener)	1
		Liquid protease	0.5
Liquid fragrance	0.3
		Pigment	0.1

Adding 8g of polyvinyl alcohol, 3g of polyvinylpyrrolidone and 48g of deionized water into a batching pot, stirring and pre-dissolving for 45min, and controlling the temperature at 70 ℃ until the polyvinyl alcohol, the polyvinylpyrrolidone and the deionized water are completely dissolved; adding 20.1g of sodium lauryl sulfate, 10g of AES, 5g of 6501, 3g of AEO9 and 0.1g of pigment into a mixing pot, controlling the temperature of the mixing pot at 70 ℃, and stirring for 40min to obtain uniform slurry; transferring the slurry to a drying cylinder at 85 ℃, and drying to prepare about 10 pieces of single laundry pieces with about 4 g; taking 2 single laundry tablets, and smearing or spraying about 0.1g of amino silicone oil, about 0.05g of liquid protease and about 0.03g of liquid perfume on the surface of each single laundry tablet; and (3) using a bonding machine to bond and squeeze the 2 laundry pieces together, and then shearing, stamping and packaging to prepare the multilayer laundry piece.

Example 5

The formulation of the multi-layer laundry tablets of this example is shown in table 5.

TABLE 5

Adding 10g of polyvinyl alcohol and 50g of deionized water into a batching pot, pre-dissolving for 45min, and controlling the temperature at 70 ℃ until the polyvinyl alcohol and the deionized water are completely dissolved; adding 17.9g of sodium lauryl sulfate, 10g of AOS, 5g of AEO9, 5g of sodium citrate and 0.1g of pigment into a mixing pot, controlling the temperature of the mixing pot at 70 ℃, and stirring for 40min to obtain uniform slurry; transferring the slurry to a drying cylinder at 85 ℃, and drying to prepare about 10 pieces of single laundry pieces with about 4 g; applying or spraying about 0.15gHP66K, about 0.03g liquid protease and about 0.02g liquid perfume on the surface of each of 3 single laundry tablets; and (3) using a bonding machine to bond and squeeze the 3 laundry pieces together, and then shearing, stamping and packaging to prepare the laundry pieces.

Example 6

The formulation of the multi-layer laundry tablets of this example is shown in table 6.

TABLE 6

Adding 10g of polyvinyl alcohol and 52g of deionized water into a batching pot, stirring and pre-dissolving for 40min, and controlling the temperature at 65 ℃ until the polyvinyl alcohol and the deionized water are completely dissolved; adding 17.9g of sodium dodecyl benzene sulfonate, 10g of AOS, 2g of AEO9, 2g of glycerol, 5g of sodium citrate and 0.1g of pigment into a mixing pot, controlling the temperature of the mixing pot at 70 ℃, and stirring for 40min to obtain uniform slurry; transferring the slurry to a drying cylinder at 90 ℃, and drying to prepare about 10 pieces of single laundry pieces with about 4 g; taking 2 washing sheets, smearing or spraying about 0.05g of liquid nano-silver antibacterial agent solution, about 0.03g of liquid protease and about 0.02g of liquid perfume on the surface of each washing sheet; and (3) using a bonding machine to bond and squeeze the 2 laundry pieces together, and then shearing, stamping and packaging to prepare the multilayer laundry piece.

Example 7

The formulation of the multi-layer laundry tablets of this example is shown in table 7.

TABLE 7

Components	Mass, g
		Deionized water	55
Polyvinyl alcohol	10
		Sodium dodecyl benzene sulfonate	8
AOS (α -olefin sodium sulfonate)	13
		AEO9 (fatty alcohol polyoxyethylene ether)	6
Citric acid sodium salt	2
		Glycerol	3.3
White oil	2
		Liquid fragrance	0.4
Pigment	0.3

Adding 10g of polyvinyl alcohol and 55g of deionized water into a batching pot, stirring and pre-dissolving for 30min, and controlling the temperature at 60 ℃ until the polyvinyl alcohol and the deionized water are completely dissolved; adding 8g of sodium dodecyl benzene sulfonate, 13g of AOS, 6g of AEO9, 3.3g of glycerol, 2g of sodium citrate, 2g of white oil and 0.3g of pigment into a proportioning pot, controlling the temperature of the proportioning pot at 74 ℃, and stirring for 45min to obtain uniform slurry; transferring the slurry to a drying cylinder at 82 ℃, and drying to prepare about 10 pieces of single laundry pieces with about 4 g; taking 3 washing sheets, and smearing or spraying about 0.04g of liquid perfume on the surface of each washing sheet; and (3) using a bonding machine to bond and squeeze the 3 laundry pieces together, and then shearing, stamping and packaging to prepare the multilayer laundry piece.

Test example 1

The multi-layer laundry tablets prepared in examples 1 to 7 and the commercially available laundry tablets were examined for detergency in comparison with the standard laundry detergent in the national standard according to the national standard GB/T13174-2008, and the results are shown in Table 8.

TABLE 8

From the above stain removal results, the stain removal effect of the multi-layer laundry tablets prepared in examples 1 to 6 of the present application is superior to that of the commercially available laundry tablet, and particularly, the stain removal effect on JB02 stain cloth (protein stain cloth) is significantly superior to that of the commercially available laundry tablet sample.

Test example 2

The laundry tablets prepared according to examples 1 to 7 and the commercially available laundry tablets were investigated for their relative ash content in comparison with the standard laundry detergent according to the national standard GB/T13174-2008, the results of which are reported in Table 9.

TABLE 9

As can be seen from the above ash measurements, the relative ash content of the multi-layer laundry tablets prepared in examples 1-7 of the present application is significantly less than that of the commercially available laundry tablets, indicating that the multi-layer laundry tablets prepared in examples 1-7 have no insoluble deposits on the laundry during use.

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims

1. A multi-layer laundry tablet comprising two or more laundry tablet pieces, wherein the surfaces of the two or more laundry tablet pieces are coated or sprayed with a bonding substance, and the bonding substance is selected from one or more of liquid biological enzyme with bonding effect, liquid perfume, liquid softening agent, liquid color fixative and liquid antibacterial agent;

wherein the multilayer laundry tablets are prepared by the following method: coating or spraying a bonding material on the surface of the single piece of the laundry piece, and bonding and pressing the single piece of the laundry piece coated or sprayed with the bonding material with two or more layers.

2. The multi-layer laundry tablet of claim 1, wherein the individual pieces of the laundry tablet are not the same composition.

3. The multilayer laundry tablet of claim 1, wherein the liquid bio-enzyme is selected from one or more of liquid protease, liquid lipase, liquid amylase, liquid cellulase, liquid mannanase, pectinase, cutinase.

4. The multi-layer laundry tablet of claim 1, wherein the liquid softener is selected from one or more of a cationic softener, an anionic softener, a nonionic softener, an amphoteric quaternary softener, and a silicone softener.

5. The multi-layer laundry tablet of claim 4, wherein the liquid softener is selected from one or more of quaternary ammonium cationic softeners, sodium stearyl sulfosuccinate, polyoxyethylene esters, amino-modified silicones, polyether hydrophilic silicones, and dimethyl silicones.

6. The multi-layered laundry tablet of claim 1, wherein the liquid color fixative is selected from one or more of a cationic color fixative, a non-ionic color fixative.

7. The multi-layered laundry tablet of claim 6, wherein the liquid color fixative is selected from one or more of an imidazoline-type cationic color fixative, a cationic cellulose, a nonionic color fixative HP66K, and a quaternary ammonium salt-type cationic color fixative.

8. The multilayer laundry tablet of claim 1, wherein the liquid antimicrobial agent is selected from one or more of a nano-silver antimicrobial agent, an imidazole antimicrobial agent, a thiazole antimicrobial agent, and a quaternary ammonium salt antimicrobial agent.

9. The multi-layer laundry tablet of claim 1, free of forming aids.

10. The multilayer laundry tablet of claim 9, wherein the forming aid is selected from one or more of starch, kaolin, silica, bentonite, talc.

11. The multi-layered laundry tablet of claim 1, wherein the single piece of laundry tablet contains one or more of a fragrance, a softening agent, a color fixative, and an antimicrobial agent.

12. The multilayer laundry tablet according to any one of claims 1-11, comprising the following components:

13. the multilayer laundry tablet of claim 12, wherein the weight ratio of the film former to total surfactant is from 1:1 to 1: 5.5.

14. The multi-layer laundry tablet of claim 12, wherein the anionic surfactant is selected from one or more of alkyl benzene sulfonates, alkyl sulfonates, lauryl alcohol sulfates, fatty alcohol polyoxyethylene ether sulfates, α -olefin sulfonates, fatty acid methyl ester sulfonates, and fatty acid salts.

15. The multi-layer laundry tablet of claim 14, wherein the anionic surfactant is selected from one or more of sodium alkyl benzene sulfonate, sodium lauryl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium α -olefin sulfonate, sodium fatty acid methyl ester sulfonate.

16. The multilayer laundry tablet according to claim 12, wherein the nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, fatty acid methyl ester ethoxylate, alkyl alcohol amide, alkyl glycoside.

17. The multi-layer laundry tablet of claim 16, wherein the non-ionic surfactant is selected from one or more of fatty acid diethanolamide, fatty alcohol polyoxyethylene ether.

18. The multilayer laundry tablet of claim 12, wherein the humectant is selected from one or more of propylene glycol, glycerin, isopropyl alcohol, mannitol.

19. The multilayer laundry tablet of claim 12, wherein the chelating agent is selected from one or more of sodium citrate, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, sodium hydroxyethylidene diphosphate, sodium diethylenetriaminepentaacetate.

20. The multilayer laundry tablet of claim 12, wherein the film-forming agent is selected from one or more of polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene glycol 800-.

21. The multilayer laundry tablet of claim 12, wherein the release agent is selected from one or more of white oil, silicone oil, methyl silicone oil.

22. The multilayer laundry tablet of claim 12, further comprising 0-5 parts by weight of a preservative, 0-5 parts by weight of a colorant, 0-5 parts by weight of a liquid flavorant, or a combination thereof.

23. A method of making a multilayer laundry tablet according to any one of claims 1-11, the method comprising: coating or spraying a bonding material on the surface of the single piece of the laundry piece, and bonding and pressing the single piece of the laundry piece coated or sprayed with the bonding material with two or more layers.

24. A method of making a multilayer laundry tablet according to any one of claims 12-22, the method comprising: dissolving a film forming agent in water, sequentially adding an anionic surfactant, a nonionic surfactant, a wetting agent, a chelating agent, a release agent, optionally an antiseptic and a pigment, and uniformly stirring to obtain slurry; drying the slurry to obtain single pieces of the laundry pieces; coating or spraying liquid biological enzyme, optionally coating or spraying liquid perfume, liquid softening agent, liquid color fixative, and liquid antibacterial agent on the surface of the single piece of the laundry piece; and adhering and pressing the coated or sprayed two or more layers of the single laundry pieces together.

25. The method according to claim 24, wherein the film forming agent is pre-dissolved in the water with stirring for 30-60min at a temperature of 60-80 ℃.

26. The method of claim 24, wherein the preparation of the slurry is performed at 60-80 ℃ and the stirring time for preparing the slurry is 30-60 min.

27. The method of claim 24, wherein the temperature of the drying is 60-120 ℃.