CN107699399B

CN107699399B - Long-acting washing machine anti-string color block and preparation method thereof

Info

Publication number: CN107699399B
Application number: CN201711002143.6A
Authority: CN
Inventors: 咸士凯; 陈伟才; 王松营; 罗勇; 张利萍
Original assignee: Guangzhou Liby Enterprise Group Co Ltd
Current assignee: Guangzhou Liby Enterprise Group Co Ltd
Priority date: 2017-10-24
Filing date: 2017-10-24
Publication date: 2020-10-27
Anticipated expiration: 2037-10-24
Also published as: CN107699399A

Abstract

The invention relates to the technical field of daily chemical products, in particular to a long-acting washing machine anti-string color block and a preparation method thereof. The color block of the invention can be firmly attached to the wall of the detergent tank of the washing machine, and the color block can uniformly release active ingredients along with the water flow scouring of the water inlet and can be uniformly dispersed in water, so that a certain amount of vinylpyrrolidone-vinylimidazole copolymer is dissolved when water enters the detergent tank, the color function of the color block is very quick in effect, and the water flow of the water inlet of the washing machine is almost the same each time, so that the stable color block can be ensured to have the stable color block effect. In addition, the color-mixing-preventing block has the characteristic of slow release, can prevent the color mixing phenomenon of clothes in a longer time, can be used for multiple times, improves the use convenience, and simultaneously solves the problem that the color mixing in the rinsing stage cannot be solved by the existing color-mixing-preventing detergent.

Description

Long-acting washing machine anti-string color block and preparation method thereof

Technical Field

The invention relates to the technical field of daily chemical products, in particular to a long-acting washing machine anti-stringing color block and a preparation method of the anti-stringing color block.

Background

Consumers often encounter the problem of cross-staining of the laundry when washing the laundry on a daily basis. The process of color-mixing of clothes in the washing process generally means that the dye falls off from the clothes with dark color in the washing process, and the dye is dispersed into the washing system and then is stained on the surface of the clothes washed simultaneously. White or light-colored clothes are easy to have dark spots or color blocks due to the contamination of dyes, and the attractiveness is seriously influenced. Even if the fabric is washed again, the dye is difficult to completely remove, and the service life of the clothes is greatly shortened.

The washing of the fugitive clothes separately from the washing of other clothes is the simplest method of preventing cross-color. However, consumers cannot judge how many times the laundry is washed before the dye-shedding phenomenon occurs. The deep-colored laundry and the light-colored laundry are separately washed a plurality of times in a comprehensive manner not only to waste water and electricity due to the increase of the number of washing times but also to increase the amount of labor, taking up valuable time.

The color absorbing sheet with the color cross-color preventing function and the detergent have been developed in the industry to solve the problem of clothes color cross-color shuffling.

CN 103132276A discloses a viscose non-woven fabric color absorbing sheet modified with 2, 3-epoxypropyl trimethyl ammonium chloride cation; CN 103938298B discloses a cationic cellulose ether modified viscose fiber, and the fiber is solidified into a non-woven fabric to make a cross color prevention non-woven fabric; CN 103191583A discloses a color-cross-proof catching sheet prepared by dipping a nonwoven fabric treated with poly dimethyl diallyl ammonium chloride and shearing the nonwoven fabric. The core idea of the above patent documents is to arrange a cationic color absorber capable of combining with a dye on a non-woven fabric sheet, and put the non-woven fabric sheet into water when in use, so that the dropped dye can be rapidly combined with the cation to ensure that the concentration of the dye in the solution is kept at a low level. However, in practical use, it is found that the solutions solve the problem of color mixing of clothes to some extent, but still have the following disadvantages: 1. is used for a single time. A certain amount of color cross-color-resistant non-woven fabric is put into clothes for each time, the color cross-color-resistant non-woven fabric needs to be picked out from the clothes after washing, and a new color cross-color-resistant non-woven fabric needs to be put into the clothes again when the clothes are washed next time; 2. it is difficult to determine the amount used. Although the recommended use amount of the product is provided, the anti-cross color non-woven fabric is usually used in practice because the required amount of different clothes is completely different due to different washing. The cross color prevention effect can not be achieved when the non-woven fabric is used less, and the non-woven fabric which is used more and has no color absorption can be thrown away after being washed, thereby causing waste. 3. The cross color prevention effect is unstable. Under the impact of water flow in the washing process, the color-crossing-preventing non-woven fabric is sometimes rolled together and even sometimes wrapped in clothes, so that the contact area and the contact time of the non-woven fabric and dye are greatly reduced, and the color-crossing-preventing effect is greatly reduced. 4. The rate of color absorption is slow. When the concentration of the dye fading out of water is high, even if a large amount of the cross-color-resistant non-woven fabric is used, a certain time is required to reduce the concentration of the dye to be low enough, and white clothes or light-colored clothes are often dyed in the process.

In addition to the anti-cross-color fibers, the use of detergents with anti-cross-color function is also a means to solve the problem of color mixing of shuffles. CN 103966033A discloses a cross color prevention laundry detergent, which is added with a novel cross color prevention agent, the cross color prevention agent reduces loss of dye molecules and amount of dye attached to light color fabric by forming a film on the surface of the fabric, or wraps the dye molecules in the laundry detergent, so that the dye molecules are not easy to directly adhere to the fabric, thereby achieving the purpose of cross color prevention. CN 106833984A discloses a laundry detergent containing fluorocarbon surfactant, which can reduce the solubility of dye to achieve the effect of preventing color cross-linking. Other forms of anti-cross-color detergents are currently reported in addition to laundry detergents. CN 106350288A discloses a washing gel bead with color cross-linking prevention function, in which a color cross-linking prevention agent is added, and the color cross-linking prevention agent is released into the washing liquid to achieve the color cross-linking prevention effect during the use process. No matter which anti-cross color detergent is adopted, the anti-cross color effect achieved by the mode of releasing the anti-cross color agent is shorter in onset time compared with the anti-cross color fiber and is very stable. However, the anti-cross-color laundry detergent has certain problems, such as: 1. the prevention of color cross-talk in the rinsing stage cannot be guaranteed. Some clothes with serious color fading are continuously faded in the rinsing stage, so that the color cross phenomenon occurs. And detergent cannot be continuously added in the rinsing stage, so that the anti-cross-color effect cannot be achieved. 2. The range of use of the detergent is limited. If consumers who are used to washing powder or washing condensation beads need to add the washing liquid to obtain the anti-cross-color effect, the amount of the added washing liquid cannot be less than that of the washing liquid used alone to ensure the anti-cross-color effect, and thus, the detergent is seriously wasted.

In summary, the existing products such as the anti-cross-color fiber and the anti-cross-color laundry detergent have certain defects in the aspects of use portability and anti-cross-color capability. Therefore, how to prepare the anti-cross color product which is more convenient to use and more stable and efficient in anti-cross color performance is still a problem to be solved urgently in the field of washing.

Disclosure of Invention

Aiming at the problems of inconvenient single use, unstable anti-cross color effect, slow color absorption rate and the like of the existing anti-cross color product, the invention provides the anti-cross color block which can uniformly release effective components for a long time and can be used repeatedly, and the preparation method of the anti-cross color block.

In order to achieve the purpose, the invention adopts the following technical scheme.

The long-acting washing machine anti-string color block comprises the following components in percentage by mass:

20 to 60 percent of cross-color-proof polymer,

20 to 60 percent of slow release agent,

5 to 40 percent of filler,

0 to 10 percent of water.

The color cross-color-proof polymer in the long-acting washing machine color cross-color-proof block is a vinylpyrrolidone-vinylimidazole copolymer.

The slow release agent in the long-acting washing machine anti-string color block is a high molecular polymer; the structural unit of the high molecular polymer contains hydrophilic groups; the hydrophilic group is at least one of an ether group, a hydroxyl group, a carboxyl group, an amine group, an imino group and an amide group.

The slow release agent in the long-acting washing machine anti-stringing color block is selected from one or more of polyvinyl alcohol, polyacrylic alcohol, starch, Arabic gum, sodium alginate, bone meal, gelatin, casein, polyacrylamide, polyacrylic acid, polyvinylpyrrolidone, polyvinyl alcohol, polymaleic anhydride, polyquaternary ammonium salt, polyethylene glycol, carboxymethyl cellulose, methyl cellulose, ethyl cellulose and hydroxyethyl cellulose; polyvinyl alcohol and/or polyvinyl pyrrolidone are preferred.

The filler in the anti-stringing color block of the long-acting washing machine is small solid particles which can be dispersed or dissolved in water, and the particle size of the small solid particles is less than 50 meshes; the filler is selected from one or more of sodium sulfate, potassium sulfate, silicon dioxide, calcite, calcium carbonate, sodium silicate, molecular sieve, titanium dioxide, barium sulfate and cyclodextrin, and preferably, the silicon dioxide is the filler.

The anti-string color block of the long-acting washing machine can also be added with a proper amount of essence and/or pigment.

The preparation method of the long-acting washing machine anti-string color block comprises the following steps:

s1, uniformly mixing the slow release agent and the filler to obtain a mixture A;

s2, adding the cross-color prevention polymer and water into the mixture A, and uniformly mixing to obtain a mixture B;

and S3, molding the mixture B to obtain a blocky anti-string color block.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, a certain amount of sustained release agent is added into the formula, the sustained release agent can coat the anti-cross-color polymer (vinylpyrrolidone-vinylimidazole copolymer), the anti-cross-color polymer (vinylpyrrolidone-vinylimidazole copolymer) is released along with the gradual dissolution of the sustained release agent in the washing process, the release rate of the anti-cross-color polymer in the anti-cross-color block can be adjusted by adjusting the proportion of the sustained release agent in the anti-cross-color block, and the sustained release effect is achieved.

2. The long-acting washing machine anti-string color block contains a proper amount of filler, and the filler can fall off or dissolve from the main body under the flushing of water flow, so that the dissolution rate of the anti-string color block can be adjusted by matching with other components.

3. The proportion of the anti-cross color polymer, the slow release agent, the filler and the water in the long-acting washing machine anti-cross color block is optimized and allocated, so that the anti-cross color block not only has good plasticity, but also has certain viscosity on the surface, and is convenient to fix on the inner walls of detergent tanks in various shapes.

The long-acting washing machine color cross-color prevention block can be firmly attached to the wall of a washing agent tank of a washing machine, can uniformly release effective components along with the washing of water flow of a water inlet and uniformly disperse the effective components in water, and a certain amount of color cross-color prevention polymer (vinylpyrrolidone-vinylimidazole copolymer) is dissolved when water enters the washing agent tank, so that the color cross-color prevention effect is very quick, and the stable color cross-color prevention effect of the color cross-color prevention block can be ensured because the water flow of the water inlet of the washing machine is almost the same every time. In addition, the long-acting washing machine anti-cross color block has the slow release characteristic, can prevent the color cross color phenomenon of clothes in a longer time, can be used for multiple times, improves the use convenience, and simultaneously solves the problem that the color cross color of the rinsing stage cannot be solved by the conventional anti-cross color detergent. In addition, the anti-cross color block of the long-acting washing machine can quickly and uniformly release effective components, and solves the problems of low color absorption rate and unstable anti-cross color effect of the anti-cross color fiber.

Detailed Description

In order to more fully understand the technical contents of the present invention, the technical solutions of the present invention will be further described and illustrated with reference to the following specific embodiments.

The features, benefits and advantages of the present invention will become apparent to those skilled in the art from a reading of the present disclosure.

Example 1

The embodiment provides a long-acting washing machine anti-cross color block and a preparation method thereof.

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 30% of vinylpyrrolidone-vinyl imidazole copolymer, 40% of polyvinyl alcohol, 5% of polyvinylpyrrolidone, 20% of silicon dioxide and 5% of deionized water.

The preparation method of the long-acting washing machine anti-stringing color block comprises the following steps:

(1) mixing polyvinyl alcohol, polyvinylpyrrolidone and silicon dioxide, and fully and uniformly stirring to obtain a mixture A.

(2) And slowly adding the vinyl pyrrolidone-vinyl imidazole copolymer viscous liquid and water into the mixture A, and fully and uniformly stirring to obtain a mixture B.

(3) And putting the mixture B into an extruder for extrusion molding, and cutting into blocks to obtain plasticine-shaped anti-string color blocks with certain viscosity and stronger plasticity on the surfaces, wherein the molding size is 45mm multiplied by 5 mm.

Example 2

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 20% of vinyl pyrrolidone-vinyl imidazole copolymer, 10% of polyvinyl alcohol, 40% of hydroxyethyl cellulose and 30% of silicon dioxide.

The preparation method of the anti-stringing color block of the long-acting washing machine is the same as that of the embodiment 1.

Example 3

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 60% of vinyl pyrrolidone-vinyl imidazole copolymer, 20% of polyvinyl alcohol, 15% of sodium sulfate and 5% of deionized water.

Example 4

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 30% of vinylpyrrolidone-vinyl imidazole copolymer, 30% of polypropylene glycol, 5% of polyvinylpyrrolidone, 30% of silicon dioxide and 5% of deionized water.

Example 5

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 30% of vinylpyrrolidone-vinyl imidazole copolymer, 30% of polyethylene glycol, 30% of polyvinylpyrrolidone, 5% of beta-cyclodextrin and 5% of deionized water.

Example 6

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 35% of vinylpyrrolidone-vinylimidazole copolymer, 10% of polyvinyl alcohol, 10% of polyvinylpyrrolidone, 40% of silicon dioxide and 5% of deionized water.

Example 7

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 30% of vinyl pyrrolidone-vinyl imidazole copolymer, 40% of polyacrylamide and 30% of silicon dioxide.

Example 8

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 50% of vinyl pyrrolidone-vinyl imidazole copolymer, 15% of polyvinyl alcohol, 15% of polyvinyl pyrrolidone, 15% of calcium carbonate and 5% of deionized water.

Comparative example 1

The comparative example provides a long-acting washing machine anti-cross color block and a preparation method of the long-acting washing machine anti-cross color block.

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 5% of vinyl pyrrolidone-vinyl imidazole copolymer, 90% of polyvinyl alcohol and 5% of silicon dioxide.

The preparation method of the long-acting washing machine anti-stringing color block of the comparative example is the same as that of the example 1.

Comparative example 2

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 70% of vinyl pyrrolidone-vinyl imidazole copolymer, 10% of polyvinyl alcohol, 5% of polyvinyl pyrrolidone, 10% of sodium sulfate and 5% of deionized water.

Comparative example 3

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 10% of vinyl pyrrolidone-vinyl imidazole copolymer, 10% of polyvinyl alcohol, 5% of polyvinyl pyrrolidone, 60% of silicon dioxide and 15% of deionized water.

Comparative example 4

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 0% of vinylpyrrolidone-vinyl imidazole copolymer, 85% of polyvinyl alcohol, 5% of polyvinylpyrrolidone and 10% of deionized water.

Comparative example 5

The long-acting washing machine anti-string color block comprises the following components in percentage by mass: 40% of vinyl pyrrolidone-vinyl imidazole copolymer, 40% of polyethylene, 10% of silicon dioxide and 10% of deionized water.

The long-acting washing machine anti-cross color block prepared by the embodiment and the comparative example is tested for anti-cross color effect, and the test method comprises the following test experiment 1 and test experiment 2.

Test experiment 1

And putting the color cross-proof blocks into a detergent tank of the Hello pulsator washing machine, and lightly pressing the color cross-proof blocks to enable the surfaces of the color cross-proof blocks to be tightly attached to the tank wall of the detergent tank of the washing machine. 10 pieces of national standard white cloth (washing cloth) with the size of 6cm multiplied by 6cm are put into a washing machine, and 5ml of laundry detergent is added. The national standard white cloth was washed with a main wash of 45L water for 20min, a 49L water rinse once and a 9min dehydration program at room temperature. Wherein the washing program was suspended just after the main wash stage was filled with 45L of water and 3ml of a 1 wt% mass fraction direct bright red aqueous solution was added to the washing machine. And after the washing program is finished, taking out the washed cloth and drying the washed cloth, comparing the Color difference values of the national standard white cloth which is not washed and the washed cloth (the washed white cloth) by using an Alice Color-i5 Color difference meter, testing 10 groups of Color difference values, and averaging the obtained 10 groups of Color difference values. The anti-cross color effect after washing was evaluated, and the evaluation criteria are shown in table 1:

TABLE 1 anti-cross color Performance evaluation criteria

Table 2 shows the color difference values of the respective examples and comparative examples and the evaluation results obtained according to the evaluation criteria of table 1. As can be seen from the data in Table 2, the color difference values of the washed cloth washed by the anti-cross color block of the embodiment and the standard white cloth are less than 2, and the anti-cross color effect is excellent or good. Especially, the color of the washing cloth after the anti-string color blocks of the example 1, the example 3 and the example 8 are washed is almost the same as that of the control white cloth. This is mainly because the ratio of the components in the formula is moderate, so that enough anti-cross color polymer can be released into the main washing liquid along with the water flow in the water inlet process of the washing machine. The washed color difference values of the anti-stringing color block samples of the embodiment 2 and the embodiment 5 are both more than 1, and the evaluation is good. This is mainly because the samples of the two examples have a relatively small amount of anti-cross-color polymer and a relatively high content of sustained-release agent, with the result that less anti-cross-color polymer is released from the anti-cross-color block during the water inlet of the washing machine, resulting in a slightly inferior anti-cross-color effect. The color difference of the washed white cloth of the anti-cross color block of the comparative example 1 reaches 4.12 after washing, the white cloth can be obviously dyed after washing, and the anti-cross color effect is very poor. The main reason is that the content of the anti-cross color polymer is only 5%, the dosage of the slow release agent reaches 90%, and the total amount of the anti-cross color polymer released in the water inlet process is very small, so the anti-cross color effect is very poor. Comparative example 1 has very poor anti-cross-color effect due to the fact that no anti-cross-color polymer is contained, and only polyvinylpyrrolidone in the sustained release agent has weak anti-cross-color effect, and the corresponding color difference value is as high as 6.31. Although the proportion of the cross-color prevention polymer in the formula of the cross-color prevention block in the comparative example 5 reaches 40%, due to the use of insoluble polymer polyethylene, only few effective components on the surface enter the washing machine along with water flow in the water inlet process of the washing machine, the effective components in the block are wrapped by the polyethylene and cannot be dissolved out, and as a result, the washed accompanied washing cloth is obviously dyed. From the experimental results, the reasonable blending of the types and the compositions of the anti-cross-color polymer, the slow release agent and the filler enables the embodiment obtained by the technical scheme of the invention to have the anti-cross-color effect far better than that of the comparative example.

Table 2 color difference values and evaluation results of the after-washing cloth using the anti-roping color blocks of different examples and comparative examples and the standard white cloth

Test experiment 2

And putting the color cross-proof block into a detergent tank of the Heler pulsator washing machine, and lightly pressing the color cross-proof block to enable the surface of the color cross-proof block to be tightly attached to the bottom of the detergent tank. 4 pieces of national standard white cloth (washing cloth) with the size of 6cm multiplied by 6cm are put into a washing machine, and 5ml of laundry detergent is added. The national standard white cloth is washed by a main washing procedure of 45L of water for 20min, 49L of water for one-time rinsing and 9min of dehydration at room temperature. Wherein the washing program is suspended just after the main wash stage has been filled with 45L of water and 1ml of a 1 wt% by weight direct bright red aqueous solution is added to the washing machine. After the washing procedure is finished, the washed cloth is taken out and dried, then the Color difference values of the national standard white cloth and the washed cloth (the washed white cloth) which are not washed are compared by an Alice Color-i5 Color difference meter, and the obtained 4 groups of Color difference values are averaged. The above experimental process was repeated 25 times without taking out the anti-roping color block, and the average color difference values of the washed cloth after the 5 th, 10 th, 15 th, 20 th and 25 th washing were respectively tested.

And evaluating the effective use times of the anti-stringing color blocks, and determining that the anti-stringing color blocks are invalid when the color difference value delta of the washed cloth after n times is more than 2. The following evaluation criteria were established according to this principle:

TABLE 3 evaluation criteria for effective use times of anti-stringing color lump

TABLE 4 color difference values and scores for the washcloth after anti-roping color blocks of different examples and comparative examples and the standard white cloth

Note: in table 4, "5 times" means the average color difference value of the washed cloth after the 5 th washing.

Table 4 is the color difference values and scores for the washcloth after using the anti-roping color blocks of the different examples and comparative examples versus a standard white cloth. As can be seen from Table 4, the effective number of uses of each example reached 20 or more. The main reason is that the proportion of each component is properly matched in the embodiment, so that a proper amount of effective components are released into the washing liquid in the water inlet process of the washing machine. In the comparative example 1, the content of the cross-color prevention polymer in the formula is only 5%, so that effective components released into the washing machine each time are not enough to ensure that clothes are not dyed, the color difference of white cloth washed in an experiment after the cross-color prevention block in the comparative example 1 is used for 5 times is 2.14, and the cross-color prevention effect is very poor. The content of the cross-color preventing polymer in comparative example 2 reached 70%, but the content of the sustained-release agent was only 15%, which resulted in too fast release of the effective ingredient and shortened service life. From the data, the color difference of the white cloth after washing after 5 times of use is only 0.41 because the anti-cross color polymer release amount is large. The difference in colour after the 10 th wash increased rapidly to 1.55, indicating that the amount of anti-cross-colour polymer released in comparative example 2 was insufficient to ensure that the garment was not coloured during the wash between the 10 th or 5 th and 10 th washes. The cross color prevention effect of the comparative example 3 is only scored at 1 point, mainly because the content of the effective components is less and the filler is more, and the cross color prevention block of the comparative example 3 is quickly consumed similarly to the case of the comparative example 2, so that the effective cross color prevention effect cannot be achieved after 10 times of washing. Comparative example 4 and comparative example 5 hardly released the anti-cross-color polymer during the water inflow, and thus did not exert the anti-cross-color effect, and both were rated 0. From the above experimental results, it can be seen that the effective service life of the embodiment obtained by the technical scheme of the present invention is significantly longer than that of the comparative example due to the reasonable blending of the species and the composition of the anti-cross-color polymer, the sustained release agent and the filler.

The technical contents of the present invention are further illustrated by the examples, so as to facilitate the understanding of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention.

Claims

1. The long-acting washing machine anti-string color block is characterized by comprising the following components in percentage by mass:

20 to 60 percent of cross-color-proof polymer,

20 to 60 percent of slow release agent,

5 to 40 percent of filler,

5% -10% of water;

the anti-cross-color polymer is a vinylpyrrolidone-vinylimidazole copolymer;

the slow release agent is selected from one or more of polyvinyl alcohol, polyacrylamide, polyvinylpyrrolidone and hydroxyethyl cellulose;

the filler is selected from one or more of sodium sulfate, potassium sulfate, silicon dioxide, calcium carbonate and cyclodextrin.

2. The long-acting washing machine anti-stringing color block of claim 1, wherein the particle size of the filler is less than 50 mesh.

3. The preparation method of the long-acting washing machine anti-stringing color block as claimed in claim 1, characterized by comprising the following steps:

and S3, molding the mixture B to obtain a blocky anti-string color block.