KR102665115B1 - Sheet type laundry detergent manufacturing method - Google Patents

Abstract

A method for manufacturing a sheet-type laundry detergent according to an embodiment of the present invention includes an aging step of maturing a laundry detergent composition prepared by containing PVA, PVP, starch and a surfactant in purified water in an aging room, and the laundry detergent composition that has undergone the aging step. The density is 0.1 to 0.9g/ , a foaming step of foaming using a foaming machine so that the viscosity is 25,000 to 55,000 cps, an application step of placing the laundry detergent composition foamed through the foaming step into a coating liquid box of a comma coating machine and applying it to a release film at a constant thickness, the application step. A drying step of converting the laundry detergent composition applied to the release film into fabric by putting the release film and the laundry detergent composition in a dryer and drying only the purified water. Through the drying step, the laundry detergent composition is maintained in the form of fabric and the purified water is removed. A peeling step of peeling the laundry detergent composition from the release film, spraying water on the laundry detergent composition in the form of fabric through the peeling step, stacking 1 to 10 layers, and then placing them in the dryer to wash a plurality of fabrics. It may include a laminating step of laminating the detergent composition.

Description

Sheet-type laundry detergent manufacturing method {SHEET TYPE LAUNDRY DETERGENT MANUFACTURING METHOD}

The present invention relates to a method for manufacturing sheet-type laundry detergent.

In general, powder detergents or liquid detergents have been used as detergents used in washing machines.

However, liquid detergents have the disadvantage that consumers are reluctant to use them because they are relatively heavy, and in the case of powder detergents, powder flies when used and residues remain after washing, so the need for new types of detergents has been constantly raised.

A new laundry sheet, a sheet-type solid detergent, was developed by improving the conventional detergent, but there was a problem that it was alkaline, causing irritation and damage to the skin, and the solubility of the sheet itself was insufficient.

The present invention, which was conceived with the above technical background, seeks to provide a method for manufacturing a sheet-type laundry detergent that has excellent cleaning properties, excellent solubility, and is easy to store and use.

A method for manufacturing a sheet-type laundry detergent according to an embodiment of the present invention includes an aging step of maturing a laundry detergent composition prepared by containing PVA, PVP, starch and a surfactant in purified water in an aging room, and the laundry detergent composition that has undergone the aging step. The density is 0.1 to 0.9g/ , a foaming step of foaming using a foaming machine so that the viscosity is 25,000 to 55,000 cps, an application step of placing the laundry detergent composition foamed through the foaming step into a coating liquid box of a comma coating machine and applying it to a release film at a constant thickness, the application step. A drying step of converting the laundry detergent composition applied to the release film into fabric by putting the release film and the laundry detergent composition in a dryer and drying only the purified water. Through the drying step, the laundry detergent composition is maintained in the form of fabric and the purified water is removed. A peeling step of peeling the laundry detergent composition from the release film, spraying water on the laundry detergent composition in the form of fabric through the peeling step, stacking 1 to 10 layers, and then placing them in the dryer to wash a plurality of fabrics. It may include a laminating step of laminating the detergent composition.

The laundry detergent composition may contain 7 to 17% by weight of PVA, 2 to 8% by weight of PVP, and 2 to 8% by weight of starch, based on the total weight.

The surfactant may include 40 to 60% by weight of AOS-1416, an anionic surfactant, 2 to 8% by weight of PCG, an anionic surfactant, and 6 to 14% by weight of APG, a nonionic surfactant.

It may further include 0.1 to 0.6% by weight of sodium benzoate, 0.3 to 1.5% by weight of sodium citrate, 0.3 to 1.5% by weight of citric acid, and 1 to 6% by weight of salt.

It may further include 0.3 to 3% by weight of natural soap ingredients, 0.3 to 3% by weight of silk extract, 0.5 to 6% by weight of cyclodextrin, and 0.5 to 6% by weight of a plurality of enzymes.

In the maturing step, the laundry detergent composition may be aged at 25 to 70 degrees for 2 to 50 hours.

The application step can be applied to a thickness of 0.3 to 3.8 mm.

In the drying step, purified water can be dried by setting the dryer temperature to 40 to 210 degrees and the drying speed to 0.3 to 6 m/min.

In the peeling step, the peeled fabric has a thickness of 0.3 to 3.8 mm and a density of 0.03 to 0.35 g/ It can be.

The lamination step may be performed at 50 to 130 degrees in the dryer.

The method for manufacturing a sheet-type laundry detergent according to an embodiment of the present invention has excellent adhesion and solubility, and can be easy to store and use.

1 is a flowchart of a method for manufacturing a sheet-type laundry detergent according to an embodiment of the present invention.
Figure 2 is a perspective view of a sheet-type laundry detergent according to an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and identical or similar components are given the same reference numerals throughout the specification.

In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that it does not exclude in advance the existence or possibility of addition of elements, numbers, steps, operations, components, parts, or combinations thereof. Additionally, when a part of a layer, membrane, region, plate, etc. is said to be “on” another part, this includes not only cases where it is “directly above” the other part, but also cases where there is another part in between. Conversely, when a part of a layer, membrane, region, plate, etc. is said to be “beneath” another part, this includes not only cases where it is “immediately below” another part, but also cases where there is another part in between.

Figure 1 is a perspective view of a sheet-type laundry detergent according to an embodiment of the present invention.

Referring to Figure 1, the sheet-type laundry detergent (1) is manufactured using PVA (Polyvinyl Alcohol), PVP (Polyvinylpyrrolidone), and starch in purified water, and may contain a surfactant. Surfactants may be the cleaning active ingredients in laundry sheets.

Sheet-type laundry detergent (1) may contain 7 to 17% by weight of PVA, 2 to 8% by weight of PVP, and 2 to 8% by weight of starch, based on the total weight, and may contain a surfactant. For example, a sheet-type laundry detergent () may contain 10% by weight of PVA, 5% by weight of PVP, 6% by weight of starch, and natural surfactants APG and PCG, based on the total weight.

Hereinafter, the following examples are presented to aid understanding of the present invention. However, the following examples are provided only to make the present invention easier to understand, and the content of the present invention is not limited by the examples.

Example: Laundry sheet performance test

<Example 1>

Based on the total weight, a laundry sheet was produced containing 10% by weight of PVA, 5% by weight of PVP, 6% by weight of starch, and 48% by weight of natural surfactants APG and PCG.

<Example 2>

Based on the total weight, a laundry sheet was produced containing 15% by weight of PVA, 5% by weight of PVP, 5% by weight of starch, and 50% by weight of natural surfactants APG and PCG.

<Example 3>

Based on the total weight, a laundry sheet was manufactured containing 30% by weight of PVA, 5% by weight of starch, and 60% by weight of a mixture of chemical surfactants SLS (Sodium Lauryl Surface) and SLES (Sodium Laureth Surface).

<Experimental Example 1>

Tensile strength is one of the measures of the strength of a material. If the tensile strength is over 10, the sheet is hard and its shape is stable, but a lot of force is required to tear it. If the tensile strength is 4 to 9, the sheet is hard and its shape is not strong. It is stable and easy to tear by human force. If the tensile strength is less than '3', it means that the sheet is not strong and it is difficult to maintain its shape and breaks.

<Experimental Example 2>

Re-adhesion prevention means preventing dust and contaminants from attaching to laundry that has been washed with the laundry sheet (1). If dust does not adhere well, it is 'high', and if dust adheres well, it is 'low'.

The working conditions in Table 1 above are as follows.

(1) Sheet specifications: width 10mm, height 10mm, thickness 0.03mm

(2) Tensile strength meter: Frankpti’s paper tensile strength tester

(3) Method: The laundry and the examples were placed in the washing machine, the washing time was set to 1 hour, the water height was set to 40 cm, and the washing machine was operated. Then, the laundry was dried and dust and contaminants were sprinkled on the laundry.

As shown in Table 1, laundry sheets containing a large amount of PVA exceeding 15% by weight but not PVP are not suitable as they have low tensile strength and attract dust easily. PVA is less than 15% by weight and PVP is not suitable. The included laundry sheet has high tensile strength and does not easily attract dust, so it is most desirable as a laundry sheet. More specifically, a laundry sheet containing 10% by weight of PVA, 5% by weight of PVP, 6% by weight of starch, and 48% by weight of natural surfactants APG and PCG, based on the total weight, may be most desirable.

Through this, the sheet-type laundry detergent () of the present invention contains less PVA than 15 to 30% by weight of the conventional sheet-type detergent, so it can contain more active ingredients necessary for washing, thereby improving cleaning power and miniaturizing the sheet. This makes it more convenient to store and use. In addition, the tensile strength of the sheet can be further strengthened by adding PVP, and the sheet can maintain its shape stably even when stored for a long period of time. When tearing and using the sheet, only the desired area can be torn, making it easy to use, and re-attachment is prevented. It can prevent dust or contaminants from attaching to washed clothes or laundry. In addition, the use of natural surfactants can reduce environmental pollution when using detergents.

The surfactant may include 44 to 46% by weight of AOS-1416, an anionic surfactant, 2 to 4% by weight of PCG, an anionic surfactant, and 6 to 14% by weight of APG, a nonionic surfactant. For example, the surfactant may include 45% by weight of AOS-1416, an anionic surfactant, 3% by weight of PCG, an anionic surfactant, and 12% by weight of APG, a nonionic surfactant, based on the total weight.

Hereinafter, the following examples are presented to aid understanding of the present invention. However, the following examples are provided only to make the present invention easier to understand, and the content of the present invention is not limited by the examples.

Example: Environmental pollution test

<Example 1>

A laundry sheet was manufactured using natural surfactants including 40% by weight of AOS-1416, an anionic surfactant, 3% by weight of PCG, an anionic surfactant, and 12% by weight of APG, a nonionic surfactant, based on the total weight.

<Example 2>

A laundry sheet was manufactured using natural surfactants including 45% by weight of AOS-1416, an anionic surfactant, 3% by weight of PCG, an anionic surfactant, and 10% by weight of APG, a nonionic surfactant, based on the total weight.

<Example 3>

A laundry sheet was manufactured using a chemical-based surfactant containing 60% by weight of a mixture of SLS (Sodium Lauryl Surface) and SLES (Sodium Laureth Surface) based on the total weight.

<Experimental Example 1>

The level of natrosamine, a carcinogen exposed to the skin when laundry touches the skin. The higher the level of natrosamine, the higher the threat to the human body, and the lower the level of natrosamine, the lower the threat to the human body. Five places in the laundry are randomly set. If natrosamine is detected in four or more places, it is 'dangerous', if it is detected in less than four places, it is 'warning', and if it is detected in only one place, it is 'good'.

<Experimental Example 2>

The degree of chemical accumulation detected in the washing water discharged after washing. The higher the degree, the more adversely affects environmental pollution. The lower the degree, the less it has an effect on environmental pollution. If non-decomposing chemicals such as PFAS and Sb (anthomino) are detected in the washing water, it is 'harmful', and if not detected, it is 'harmless'.

The working conditions in Table 2 above are as follows.

(1) Weight of laundry: 10kg

(2) Method: The above-described laundry and examples were placed in the washing machine, and the washing machine was operated for 1 hour, with the water height set to 40 cm.

As shown in Table 2, laundry sheets containing chemical-based surfactants are not suitable due to excessive detection of natrosamine, and laundry sheets containing natural surfactants have trace amounts of natrosamine detected and are not suitable for use with water and water. It is most desirable as a laundry sheet because it mixes and emits less chemical emissions. More specifically, a laundry product using natural surfactants including 45% by weight of AOS-1416, an anionic surfactant, 3% by weight of PCG, an anionic surfactant, and 10% by weight of APG, a nonionic surfactant, based on the total weight. Sheets may be most preferred.

Through this, the laundry sheet (1) of the present invention can further reduce environmental pollution and solve the potential carcinogen natrosamine, which has been a chronic problem with chemical-based surfactants. In addition, chemical surfactants can help prevent problems such as endocrine disruption, scalpitis, hair loss, dermatitis, and atopy by exposing the skin to chemical product accumulation and chemical metabolites remaining in laundry such as clothes and bedding. And less chemicals are leaked into the washing water used to wash laundry, which can further reduce environmental pollution.

The sheet-type laundry detergent (1) may further include 0.1 to 0.6% by weight of sodium benzoate, 0.3 to 1.5% by weight of sodium citrate, 0.3 to 1.5% by weight of citric acid, and 1 to 6% by weight of salt, based on the total weight.

Sheet-type laundry detergent (1) may contain 0.3 to 3% by weight of natural soap ingredients, 0.3 to 3% by weight of silk extract, 0.5 to 6% by weight of cyclodextrin, and 0.5 to 6% by weight of a plurality of enzymes, based on the total weight. .

Hereinafter, the following examples are presented to aid understanding of the present invention. However, the following examples are provided only to make the present invention easier to understand, and the content of the present invention is not limited by the examples.

Example: Results of Laundry

<Example 1>

Compared to the total weight, 0.3% by weight of sodium benzoate, 0.7% by weight of sodium citrate, 0.7% by weight of citric acid, 4% by weight of salt, 1% by weight of patient extract, 1% by weight of silk extract, 3% by weight of cyclone dextrin, 3% by weight of 7 types of enzymes. A laundry sheet containing was produced.

<Example 2>

A laundry sheet containing 0.3% by weight of sodium benzoate, 0.7% by weight of sodium citrate, 0.7% by weight of citric acid, 4% by weight of salt, and 1% by weight of silk extract was produced based on the total weight.

<Experimental Example 1>

Complex odor refers to a unit space (1 minute) ) refers to the complex odor dilution factor (OU) generated per unit, and the odor of washed laundry was measured using the air dilution sensory method. If the composite odor is more than 20, it is 'average', and if the composite odor is less than 20, it is 'good'.

<Experimental Example 2>

The degree of fluff and lint in the washed laundry was measured. If the degree of fluff and lint occupies more than 60% of the laundry area, it is 'slight'; if the degree of lint and lint occupies between 20 and 60% of the laundry area, it is 'normal'; and if the degree of lint and lint occupies more than 20% of the laundry area, it is 'normal'. If it accounts for less than %, it is ‘excellent’.

The working conditions in Table 3 above are as follows.

(1) Laundry: 10kg

(2) Method: The above-described laundry and examples were placed in the washing machine, and the washing machine was operated for 1 hour, with the water height set to 40 cm.

As shown in Table 3, laundry sheets made only of sodium benzoate, sodium citrate, citric acid, salt, and silk extract are not suitable as they do not remove bad odors and have minimal fluff removal ability. Laundry sheets that further contain trilin and enzymes are most desirable as laundry sheets because they have a deodorizing function, a fluff removal function due to enzymes, and an environmental pollution reduction effect due to natural soap ingredients.

Through this, the laundry sheet (1) of the present invention has a superior deodorizing function, can more effectively remove fluff from laundry due to the addition of enzymes, and can further reduce environmental pollution due to the use of lint extract, a natural soap ingredient.

The most preferred laundry sheet (1) manufactured according to the above example may have the following composition ratio.

Figure 2 is a flowchart of a method for manufacturing a sheet-type laundry detergent according to an embodiment of the present invention.

Referring to Figure 2, the sheet-type laundry detergent manufacturing method includes a ripening step (S10), a foaming step (S20), an application step (S30), a drying step (S40), a peeling step (S50), and a lamination step (S60). You can.

In the aging step (S10), a laundry detergent composition prepared by containing PVA, PVP, starch, and surfactant in purified water can be aged in an aging room.

In the aging step (S10), the laundry detergent composition may be aged at 25 to 70 degrees for 2 to 50 hours. For example, in the maturation step (S10), the laundry detergent composition may be aged at 55 degrees for 25 hours.

The laundry detergent composition may be a solution in which purified water, surfactant, PVA, PVP, and starch are added and heated, and then sodium ansaccharide, sodium citrate, extract, and fragrance are mixed. For example, the laundry detergent composition may be a solution obtained by mixing purified water, surfactant, PVA, PVP, and corn starch, adding sodium ansaccharide, sodium citrate, extract, and fragrance to a heated solution and adjusting the pH to thicken the solution.

In the foaming step (S20), the density of the laundry detergent composition that has passed the maturation step (S10) is 0.1 to 0.9 g/ , the viscosity can be foamed to 25,000 to 55,000 cps using a foamer.

In the foaming step (S20), the density of the laundry detergent composition can be adjusted by putting the laundry detergent composition that has undergone the maturation step (S10) into a foaming machine. For example, in the foaming step (S20), the density can be set by putting the aged laundry detergent composition through the maturation step (S10) into a foamer.

The foaming step (S20) increases the density of the laundry detergent composition to 0.1 to 0.9 g/ , the viscosity can be foamed at 25,000 to 55,000 cps. For example, the foaming step (S20) increases the density of the laundry detergent composition to 0.6g/ , the viscosity may be 40,000 cps.

Hereinafter, the following examples are presented to aid understanding of the present invention. However, the following examples are provided only to make the present invention easier to understand, and the content of the present invention is not limited by the examples.

Example: Degree of neutralization and saponification of PVA

<Example 1>

The density of the foamed laundry detergent composition in the foaming step is 0.6 g/ , a laundry sheet with a viscosity of 10,000 cps was produced.

<Example 2>

The density of the foamed laundry detergent composition in the foaming step is 0.6 g/ , a laundry sheet with a viscosity of 40,000 cps was produced.

<Example 3>

The density of the foamed laundry detergent composition in the foaming step is 0.6 g/ , a laundry sheet with a viscosity of 80,000 cps was produced.

<Experimental Example 1>

The degree of polymerization refers to the number of repetitive units that occur within a polymerization molecule, and in this experimental example, it refers to the degree of viscosity. The viscosity was checked by pouring a certain amount of laundry detergent composition onto the belt. A high degree of polymerization means high viscosity, a medium degree of polymerization means an appropriate viscosity, and a low degree of polymerization means low viscosity.

<Experimental Example 2>

Saponification degree refers to a value indicating the degree of hydrolysis of PVA. PVA is manufactured by hydrolyzing PVAc, an intermediate product. Since it is insoluble in water at room temperature when completely hydrolyzed, it is recommended to control the hydrolysis to extract PVA that is easily soluble even at room temperature. If the degree of saponification is high (over 98%), it is insoluble in water at room temperature. It is difficult to dissolve in water and has good solubility in water at moderate levels (88 to 98%).

As shown in Table 5, if the viscosity is less than 30,000 cps, the laundry detergent composition flows quickly and is difficult to create a certain thickness, which is not appropriate. If the viscosity is more than 50,000 cps, the flow is poor and it is difficult to form a sheet on the conveyor belt. It is not appropriate, and a viscosity of 30,000 to 50,000 cps is most desirable.

Through this, the method of manufacturing a laundry sheet of the present invention maintains an appropriate degree of polymerization and saponification of PVA, making it easier to form a sheet of a certain thickness, and maintains an appropriate degree of saponification of 88 to 98% for a laundry sheet, thereby increasing the cleaning power. , solubility and flexibility can be superior and satisfactory.

In the application step (S30), the laundry detergent composition foamed through the foaming step (S20) can be placed in the coating liquid box of the comma coating machine and applied to the release film at a constant thickness.

In the application step (S30), the laundry detergent composition that has passed the foaming step (S20) can be applied using a coater. For example, in the application step (S30), the laundry detergent composition that has undergone the foaming step (S20) can be applied using one of the following coaters: a comma coater, a knife coater, a roll coater, a spin coater, a direct coater, and a three-roll reverse coater. there is.

The application step (S30) can be applied to a thickness of 0.3 to 3.8 mm and using a release film. For example, the application step (S30) can be applied using a release film by maintaining a gap of 2.0 mm. Through this, the layer of the laundry sheet (1) can be protected from the outside and can be easily peeled off when using the product, allowing the fabric to maintain its shape well during the manufacturing process of the washable sheet and making peeling more convenient afterwards. It can be peeled off.

In the drying step (S40), the release film and the laundry detergent composition that have gone through the application step (S30) are placed in a dryer and only purified water is dried to transform the laundry detergent composition applied to the release film into fabric.

In the drying step (S40), the laundry detergent composition that has passed the application step (S30) can be put into a dryer and dried to turn the laundry detergent composition into fabric. For example, in the drying step (S40), the laundry detergent composition that has gone through the application step (S30) is placed in a dryer and the purified water in the laundry detergent composition is dried to turn the laundry detergent composition into fabric.

In the drying step (S40), the purified water can be dried by setting the dryer temperature to 40 to 210 degrees and the drying speed to 0.3 to 6 m/min. For example, in the drying step (S40), purified water in the laundry detergent composition can be dried at a temperature of 100 degrees and a drying speed of 5 m/min.

In the peeling step (S50), the laundry detergent composition, which is maintained in fabric form and has had purified water removed through the drying step (S40), can be peeled from the release film.

In the peeling step (S50), the fabric that has gone through the drying step (S40) can be peeled off from the release film. For example, in the peeling step (S50), the release film can be peeled from the laundry detergent composition that has been turned into fabric through the drying step (S40).

The release film may be a silicone-based release film.

In the peeling step (S50), the peeled fabric has a thickness of 0.3 to 3.8 mm and a density of 0.03 to 0.35 g/ It can be. For example, in the peeling step (S50), the thickness of the fabric from which the release film was peeled off was 2.0 mm and the density was 0.2 g/ It can be.

In the lamination step (S60), water is sprayed on the laundry detergent composition in the form of fabric through the peeling step (S50), overlapping 1 to 10 pieces of the laundry detergent composition in the form of fabric, and then placed in a dryer to form a plurality of laundry detergent compositions in the form of fabric. can be combined. For example, in the lamination step (S60), water can be sprayed on one side of a plurality of fabrics to form a roll by overlapping 2 to 8 fabrics, and then laminated together while drying the water using a dryer.

The dryer in the lamination step (S60) may be 50 to 130 degrees.

Although the embodiments of the present invention have been described above, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will understand the spirit of the present invention within the scope of the same spirit, including addition of components, Other embodiments can be easily proposed by changes, deletions, additions, etc., but these are also within the scope of the present invention.

1: Sheet-type laundry detergent

Claims (10)

It has a tensile strength of 4 to 9 that allows for long-term storage and adequate tearing. A maturation step of maturing a laundry detergent composition prepared by containing 7 to 17% by weight of PVA, 2 to 8% by weight of PVP, 2 to 8% by weight of starch and a surfactant in purified water in an aging room so that;
The viscosity of the laundry detergent composition poured on the belt is appropriate and has good flowability, so that the density of the laundry detergent composition that has undergone the aging step is 0.1 to 0.9 g/ , a foaming step of foaming using a foaming machine so that the viscosity is 25,000 to 55,000 cps;
An application step of putting the laundry detergent composition foamed through the foaming step into the coating liquid of a comma coating machine and applying it to a release film to a thickness of 0.3 to 3.8 mm;
A drying step of putting the release film and the laundry detergent composition that have undergone the application step into a dryer and drying only the purified water to transform the laundry detergent composition applied to the release film into fabric;
A peeling step of peeling off the laundry detergent composition from the release film, which is maintained in a fabric form through the drying step and from which the purified water has been removed; and
A laminating step of spraying water on the laundry detergent composition, which has been in the form of a fabric through the peeling step, to overlap 1 to 10 pieces, and then placing them in the dryer to laminate a plurality of fabric-shaped laundry detergent compositions,
The surfactant is,
Natrosamine is detected in less than 1 place out of 5 arbitrarily set locations in the laundry after washing, and AOS-1416, an anionic surfactant, is added from 40 to 40% to prevent PFAS and SB (Antomino), chemicals that do not decompose in washing water, from being detected. 60% by weight;
2 to 8% by weight of PCG, an anionic surfactant; and
Contains 6 to 14% by weight of APG, a nonionic surfactant,
Unit space 1 for 1 minute 0.1 to 0.6% by weight of sodium benzoate so that the complex odor dilution factor (OU) generated per unit is less than 20 and the degree of fluff and lint in the washed laundry is less than 20% of the laundry area;
0.3 to 1.5% by weight of sodium citrate;
0.3 to 1.5% by weight of citric acid; and
Further comprising 1 to 6% by weight of salt,
0.3 to 3% by weight of natural soap ingredients;
0.3 to 3% by weight of silk extract;
0.5 to 6% by weight of cyclodextrin; and
It further comprises 0.5 to 6% by weight of a plurality of enzymes,
The PVA is,
A method of manufacturing a sheet-type laundry detergent, characterized in that the degree of saponification is 88 to 98% to control the hydrolysis of PVAc.
delete delete delete delete According to claim 1,
The ripening step is,
A method of manufacturing a sheet-type laundry detergent, characterized in that the laundry detergent composition is aged at 25 to 70 degrees for 2 to 50 hours. delete According to claim 1,
The drying step is,
A method for manufacturing a sheet-type laundry detergent, characterized in that purified water is dried by setting the dryer temperature to 40 to 210 degrees and the drying speed to 0.3 to 6 m/min. According to claim 1,
The peeling step is,
The peeled fabric has a thickness of 0.3 to 3.8 mm and a density of 0.03 to 0.35 g/ A method for manufacturing a sheet-type laundry detergent, characterized in that: According to claim 1,
The lamination step is,
A method of manufacturing a sheet-type laundry detergent, characterized in that the dryer is operated at a temperature of 50 to 130 degrees.