A deodorizing, odor-absorbing, and color-absorbing nonwoven fabric and its preparation method

Abstract

This application relates to the field of nonwoven fabrics, and more particularly to a deodorizing, odor-removing, and color-absorbing nonwoven fabric, which is made from deodorizing, odor-removing, and color-absorbing fibers. The preparation steps of the deodorizing, odor-removing, and color-absorbing fibers are as follows: S1, soybean fibers are first placed in an aqueous solution of phosphate and heated and stirred; S2, the soybean fibers treated in S1 are then mixed with silver ammonia emulsion. After the mixture is uniform, it is dehydrated and dried to obtain the deodorizing, odor-removing, and color-absorbing fibers. The silver ammonia emulsion is composed of the following components by weight percentage: 5-8% amino acrylate, 0-5% polyether diol, 1.0-3.0% silver nitrate, 0.3-0.5% cationic surfactant, and the balance being water. The deodorizing, odor-removing, and color-absorbing fibers obtained by this application, after being prepared into corresponding nonwoven fabrics, can effectively combine the deodorizing and color-absorbing properties of the finished product.

Description

Technical Field

[0001] This application relates to the field of nonwoven fabric technology, and more specifically, to a deodorizing, odor-removing, and color-absorbing nonwoven fabric and its preparation method. Background Technology

[0002] Nonwoven fabric, also known as non-woven cloth, refers to a special fabric that does not require spinning or weaving. It is made by simply arranging short textile fibers or filaments in a directional or random manner to form a web structure, and then reinforcing and shaping it. It has many advantages such as being lightweight, flexible, recyclable, and breathable. Color-absorbing nonwoven fabric is an example of this.

[0003] The color-absorbing nonwoven fabrics in the relevant technology mainly include groups that adsorb dyes. By washing the clothes together in a washing machine, the dyes that are released during the washing process can be adsorbed and locked in, thereby reducing the color bleeding phenomenon that occurs during the mixed washing of clothes.

[0004] However, as the number of times color-absorbing nonwoven fabrics are used increases, they often develop odors due to problems such as dampness or bacterial growth, which seriously affects the reuse of color-absorbing nonwoven fabrics. If they are reused at this time, the washing effect will be severely affected. Therefore, there is an urgent need to provide a color-absorbing nonwoven fabric for deodorizing and odor removal and its preparation method. This color-absorbing nonwoven fabric can ensure its service life and value through self-cleaning. Summary of the Invention

[0005] To overcome the shortcomings of the aforementioned color-absorbing nonwoven fabrics in achieving self-cleaning, this application provides a deodorizing and odor-removing color-absorbing nonwoven fabric and its preparation method. The resulting color-absorbing nonwoven fabric effectively combines the original color-absorbing performance with the additional deodorizing and odor-removing performance.

[0006] In a first aspect, this application provides a nonwoven fabric for removing odors, deodorizing, and absorbing color, which is made of odor-removing, deodorizing, and absorbing color fibers. The preparation steps of the odor-removing, deodorizing, and absorbing color fibers are as follows:

[0007] S1. First, place the soybean fiber in a phosphate solution and heat and stir.

[0008] S2. Then, the soybean fiber treated in S1 is heated and mixed with silver ammonia emulsion. After the mixture is evenly mixed, it is dehydrated and dried to obtain the deodorizing, odor-removing and color-absorbing fiber.

[0009] The silver ammonia emulsion is composed of the following components in weight percentage: 5-7% amino acrylate, 0-5% polyether diol, 1.0-3.0% silver nitrate, 0.3-0.5% cationic surfactant, and the balance being water.

[0010] By adopting the above technical solution, the deodorizing and color-absorbing fiber obtained by blending pretreated soybean fiber and silver ammonia emulsion effectively balances the deodorizing and color-absorbing properties of the finished product. Compared with directly adding antibacterial agents and / or adsorbents, it has a longer service life and more lasting effect.

[0011] In summary, the reasons may be as follows: Soybean fiber treated with phosphate has significantly improved fiber looseness and binding ability, which allows it to combine more efficiently with silver ammonia emulsion in the subsequent blending process. In addition, thanks to the complexation reaction between amino acrylate and silver nitrate, it has obtained excellent and stable self-purification ability, which can achieve the effect of deodorizing by inhibiting the proliferation of bacteria.

[0012] Preferably, the phosphate in the aqueous solution has a mass percentage of 5.0-8.0%;

[0013] Specifically selected from one or more of sodium pyrophosphate, sodium hydrogen phosphate, and sodium trimetaphosphate.

[0014] Preferably, the weight ratio of soybean fiber to phosphate aqueous solution is 1:(1.0-1.5).

[0015] Preferably, the heating and mixing conditions are: mixing at 60-80℃ for 30-60 minutes.

[0016] By adopting the above technical solution, the specific selection and dosage of phosphate and the corresponding treatment conditions, the pretreatment effect on soybean fiber is effectively guaranteed. In addition to significantly enhancing the mechanical properties and binding effect of soybean fiber, it is also less likely to damage the fiber structure due to excessive acid corrosion.

[0017] Preferably, the silver ammonia emulsion is composed of the following components in weight percentage:

[0018] 5.0-7.0% amino acrylate, 3.0-5.0% polyether diol, 1.0-3.0% silver nitrate, 0.3-0.5% cationic surfactant, balance water.

[0019] Preferably, the cationic surfactant is one or more of polyquaternium-7, polyquaternium-10, polyquaternium-16, and polyquaternium-37.

[0020] Preferably, the weight ratio of the soybean fiber treated with S1 to the silver ammonia emulsion is 1:(2-3).

[0021] By adopting the above technical solution, the amino acrylate and silver nitrate in the above silver ammonia solution can undergo a complexation reaction efficiently under the action of polyether diol and cationic surfactant, thereby endowing soybean fiber with excellent and stable self-purification ability, and achieving the effect of deodorizing by inhibiting the proliferation of bacteria.

[0022] Secondly, this application provides a method for preparing a deodorizing, odor-removing, and color-absorbing nonwoven fabric, comprising the following steps:

[0023] 1) First, loosen the odor-removing, deodorizing, and color-absorbing fibers and comb them into a fiber web;

[0024] 2) The fiber web is then reinforced and shaped using a hydroentangling method;

[0025] 3) Finally, the reinforced and shaped fiber web is dried to obtain the odor-removing, deodorizing, and color-absorbing nonwoven fabric.

[0026] By adopting the above technical solution, the preparation process is significantly simplified, and the production of odor-removing, deodorizing, and color-absorbing nonwoven fabrics with uniform quality can be stably achieved simply by setting the corresponding equipment parameters. It is less affected by the process and is therefore extremely suitable for large-scale, industrialized production applications.

[0027] Thirdly, this application provides a deodorizing, odor-removing, and color-absorbing fiber, which is prepared by the following steps:

[0028] S1. First, place the soybean fiber in a phosphate solution and heat and stir.

[0029] S2. Then, the soybean fiber treated in S1 is heated and mixed with silver ammonia emulsion. After the mixture is evenly mixed, it is dehydrated and dried to obtain the deodorizing, odor-removing and color-absorbing fiber.

[0030] The silver ammonia emulsion is composed of the following components in weight percentage: 5-8% amino acrylate, 0-5% polyether diol, 1.0-3.0% silver nitrate, 0.3-0.5% cationic surfactant, and the balance being water.

[0031] By adopting the above technical solution, the odor-removing, deodorizing, and color-absorbing fiber obtained through the above specific steps and components effectively combines odor-removing and deodorizing performance with color absorption performance. Compared with directly adding antibacterial agents and / or adsorbents to the product, its service life and effectiveness are longer, thus broadening its application.

[0032] Fourthly, the odor-removing, deodorizing, and color-absorbing fiber provided in this application is used as an odor-removing and deodorizing raw material in the fields of nonwoven fabrics, woven fabrics, coatings, building materials, and medical devices. This fiber can be used as a functional component for odor removal and deodorization in any of the above-mentioned fields.

[0033] In summary, this application has the following beneficial effects:

[0034] 1. The nonwoven fabric made from specific deodorizing and color-absorbing fibers in this application has excellent and stable self-purification ability due to the complexation reaction of amino acrylate and silver nitrate. It can achieve the effect of deodorizing by inhibiting the proliferation of bacteria, thus taking into account both the deodorizing and color-absorbing performance of the finished product.

[0035] 2. The specific selection and dosage of phosphates and corresponding treatment conditions in this application can effectively ensure the pretreatment effect on soybean fiber. In addition to significantly enhancing the mechanical properties and binding effect of soybean fiber, it is also less likely to damage the fiber structure due to excessive acid corrosion.

[0036] 3. The silver ammonia solution of this application can undergo a more efficient complexation reaction between its amino acrylate and silver nitrate under the action of polyether diol and cationic surfactant, thereby endowing soybean fiber with excellent and stable self-purification ability, and can achieve the effect of deodorizing by inhibiting the proliferation of bacteria.

[0037] 4. The deodorizing and color-absorbing nonwoven fabric of this application has a simple preparation process, is easy to control the quality of finished products and industrialize production. In addition, the deodorizing and color-absorbing fibers obtained can also be used as deodorizing raw materials in the fields of nonwoven fabrics, woven fabrics, coatings, building materials and medical devices. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the embodiments.

[0039] Preparation Example

[0040] Preparation Examples 1-5

[0041] A deodorizing, odor-removing, and color-absorbing fiber, the preparation steps of which are as follows:

[0042] S1. First, place soybean fiber in a 5.0% phosphate aqueous solution at a weight ratio of 1:1 and stir at 60°C for 60 minutes. The phosphate is sodium pyrophosphate.

[0043] S2. Then, the soybean fiber treated by S1 is mixed with silver ammonia emulsion at a weight ratio of 1:2. After the mixture is evenly mixed, it is dehydrated and dried to obtain the deodorizing, color-absorbing fiber.

[0044] The components and corresponding weights of the silver ammonia emulsion are shown in the table below (per 100 kg), wherein the cationic surfactant is polyquaternium-7.

[0045] Table: Components and their weights (kg) of the raw materials for silver ammonia emulsions in Examples 1-5

[0046]

[0047] Preparation Examples 6-9

[0048] A deodorizing, odor-removing, and color-absorbing fiber differs from Preparation Example 1 in that the phosphate aqueous solution used in S1 is different, as shown in the table below.

[0049] Table: Comparison Table of Phosphate Aqueous Solutions in Preparation Examples 6-9

[0050] Group Use of phosphate aqueous solution Preparation Example 6 The phosphate is sodium pyrophosphate, with a mass percentage of 6.5% in aqueous solution. Preparation Example 7 The phosphate is sodium pyrophosphate, with a mass percentage of 8.0% in aqueous solution. Preparation Example 8 The phosphate is sodium pyrophosphate, with a mass percentage of 10.0% in aqueous solution. Preparation Example 9 The phosphate is sodium hexametaphosphate, with a mass percentage of 5.0% in aqueous solution.

[0051] Preparation Examples 10-12

[0052] A deodorizing, odor-removing, and color-absorbing fiber differs from Preparation Example 1 in that the amount of soybean fiber used in S1 remains the same, but the ratio of its amount to the phosphate aqueous solution is different, as shown in the table below.

[0053] Table: Weight ratio of soybean fiber to phosphate aqueous solution in preparation examples 10-13

[0054]

[0055]

[0056] Preparation Examples 13-15

[0057] The deodorizing, odor-removing, and color-absorbing fiber differs from Preparation Example 1 in that the heating and mixing conditions in S1 are different, as shown in the table below.

[0058] Table: Comparison of heating and mixing conditions in S1 in Preparation Examples 13-15

[0059] Group S1 heating and mixing conditions Preparation Example 13 Mix at 70℃ for 45 minutes Preparation Example 14 Mix at 80℃ for 30 minutes Preparation Example 15 Mix at 100℃ for 15 minutes

[0060] Preparation Examples 16-18

[0061] A deodorizing, odor-removing, and color-absorbing fiber differs from Preparation Example 1 in that the use of cationic surfactant in S2 is different, as shown in the table below.

[0062] Table: Comparison of Cationic Surfactant Usage in Preparation Examples 16-18

[0063] Group Usage of cationic surfactants Preparation Example 16 The cationic surfactant is polyquaternium-10. Preparation Example 17 The cationic surfactant is polyquaternium-16. Preparation Example 18 The cationic surfactant is polyquaternium-37.

[0064] Preparation Examples 19-21

[0065] A deodorizing, odor-removing, and color-absorbing fiber differs from Preparation Example 1 in that the weight ratio of soybean fiber treated by S1 to silver ammonia emulsion in S2 is different, as shown in the table below.

[0066] Table: Comparison of weight ratios of soybean fiber and silver ammonia emulsion after S1 treatment in Preparation Examples 19-21

[0067]

[0068]

[0069] The performance testing first selected the nonwoven fabrics prepared in each example and comparative example as test samples, and then tested their antibacterial rate (%) and identified whether they had any odor.

[0070] The specific experimental conditions and methods are as follows:

[0071] Color-absorbing nonwoven fabric: Specifications 30mm*30mm*0.5mm (weight 65±2g / m²) 2 );

[0072] Pure cotton fabric: 100mm*100mm*0.5mm;

[0073] Test bacterial suspension: 0.5 wt% Staphylococcus aureus (ATCC 6538) aqueous solution;

[0074] The sample fabric to be tested was mixed and washed with test bacterial solution (1000ml) and pure cotton fabric for 45 minutes, and then air-dried for 6 hours. After repeating the above operation 5 times, the antibacterial rate % and odor were tested.

[0075] When there is no odor at all, it is counted as A; when there is a slight, non-pungent odor, it is counted as B; when there is a noticeable odor, it is counted as C. The average value of the test results is used (three parallel tests are set up for each group).

[0076] Example

[0077] Example 1

[0078] A deodorizing, odor-absorbing, and color-absorbing nonwoven fabric is prepared from the deodorizing, odor-absorbing, and color-absorbing fibers obtained in Preparation Example 1. The preparation method includes the following steps:

[0079] 1) First, loosen the odor-removing, deodorizing, and color-absorbing fibers and comb them into a fiber web;

[0080] 2) Then, the fiber web is further reinforced and shaped by hydroentangling for 15 minutes;

[0081] The parameters for hydroentanglement reinforcement are as follows:

[0082] 10 water splinters / m 2 Hydroentangling pressure 60 Bar, hydroentangling height 30 mm;

[0083] 3) Finally, the reinforced fiber web is dried at 120℃ to obtain the odor-removing, deodorizing, and color-absorbing nonwoven fabric. The thickness of the obtained odor-removing, deodorizing, and color-absorbing nonwoven fabric is 0.5mm, and the basis weight is 65±2g / m². 2 .

[0084] Examples 2-5

[0085] A nonwoven fabric for removing odors, deodorizing, and absorbing color is different from that in Example 1 in that the odor-removing, deodorizing, and color-absorbing fibers used are different, and the specific correspondence is shown in the table below.

[0086] Table: Comparison of the application of odor-removing, deodorizing, and color-absorbing fibers in Examples 2-5

[0087] Group Odor-removing, deodorizing, and color-absorbing fibers Example 2 Prepared from Preparation Example 2 Example 3 Prepared from Preparation Example 3 Example 4 Prepared from Preparation Example 4 Example 5 Prepared from Preparation Example 5

[0088] Extract the color-absorbing nonwoven fabrics prepared in Examples 1-5 above, and test their antibacterial rate and odor according to the above measurement steps. The average value of the test results is recorded in the table below.

[0089]

[0090] As can be seen from the table above, the deodorizing and color-absorbing nonwoven fabrics prepared in Examples 1-5 all have excellent antibacterial and deodorizing properties, with an antibacterial rate as high as 90-99%, and all of them are completely odorless. It can be seen that they effectively guarantee their service life and recycling value through self-cleaning.

[0091] Based on the data from the various embodiments, the possible reasons are as follows:

[0092] 1) The fiber looseness and binding ability of soybean fiber after phosphate treatment are significantly improved, which in turn ensures its efficient binding with silver ammonia emulsion in the subsequent blending process.

[0093] 2) Thanks to the complexation reaction between aminoacrylate and silver nitrate, it has obtained excellent and stable self-purification ability, which can remove odors and deodorize by inhibiting the proliferation of bacteria.

[0094] As can be seen from Examples 1-3, the silver ammonia emulsion is preferably composed of the following components by weight percentage: 5-7% amino acrylate, 0-5% polyether diol, 1.0-3.0% silver nitrate, 0.3-0.5% cationic surfactant, and the balance being water. Adjustments within this range are unlikely to cause significant performance fluctuations.

[0095] Furthermore, as can be seen from Examples 4-5, the amino acrylate and silver nitrate in the above-mentioned silver ammonia solution can undergo a complexation reaction more efficiently under the action of polyether diol and cationic surfactant, thereby endowing soybean fiber with excellent and stable self-cleaning ability.

[0096] Examples 6-9

[0097] A nonwoven fabric for removing odors, deodorizing, and absorbing color is different from that in Example 1 in that the odor-removing, deodorizing, and color-absorbing fibers used are different, and the specific correspondence is shown in the table below.

[0098] Table: Comparison of the application of odor-removing, deodorizing, and color-absorbing fibers in Examples 6-9

[0099] Group Odor-removing, deodorizing, and color-absorbing fibers Example 6 Prepared from Preparation Example 6 Example 7 Prepared from Preparation Example 7 Example 8 Prepared from Preparation Example 8 Example 9 Prepared from Preparation Example 9

[0100] Comparative Example 1

[0101] A color-absorbing nonwoven fabric differs from Example 1 in that the raw materials and preparation method for the odor-removing and deodorizing color-absorbing fibers are different, as detailed below:

[0102] Soybean fiber and silver ammonia emulsion were mixed at a weight ratio of 1:2. After the mixture was evenly mixed, it was dehydrated and dried to obtain the deodorizing, odor-removing and color-absorbing fiber. All other conditions were the same as in Example 1.

[0103] The color-absorbing nonwoven fabrics prepared in Examples 6-9 and Comparative Example 1 were extracted and their antibacterial rate and odor were tested according to the above measurement steps. The average value of the test results was recorded in the table below.

[0104]

[0105] As can be seen from the table above, the deodorizing and color-absorbing nonwoven fabrics prepared in Examples 6-9 all have excellent antibacterial and deodorizing properties, with an antibacterial rate as high as 86-92%, and all of them are completely odorless, showing varying degrees of improvement compared to Comparative Example 1.

[0106] Based on the data from the above embodiments, the reason for this is that the purpose of using phosphate is mainly to ensure the pretreatment effect on soybean fiber. It is necessary to enhance the mechanical properties and binding effect of soybean fiber, while avoiding excessive acid corrosion that could damage its fiber structure.

[0107] Furthermore, as can be seen from Examples 1 and 6-7, the preferred mass percentage of the phosphate in the aqueous solution is 5.0-8.0%, and it should be selected from one or more of sodium pyrophosphate, sodium hydrogen phosphate, and sodium trimetaphosphate. Selection within this range is beneficial to the control of the stability of the finished product quality.

[0108] Examples 10-12

[0109] A nonwoven fabric for removing odors, deodorizing, and absorbing color is different from that in Example 1 in that the odor-removing, deodorizing, and color-absorbing fibers used are different, and the specific correspondence is shown in the table below.

[0110] Table: Comparison of the application of odor-removing, deodorizing, and color-absorbing fibers in Examples 10-12

[0111] Group Odor-removing, deodorizing, and color-absorbing fibers Example 10 Prepared from Preparation Example 10 Example 11 Prepared from Preparation Example 11 Example 12 Prepared from Preparation Example 12

[0112] Extract the color-absorbing nonwoven fabrics prepared in Examples 10-12 above, and test their antibacterial rate and odor according to the above measurement steps. The average value of the test results is recorded in the table below.

[0113]

[0114] As can be seen from the table above, the deodorizing and color-absorbing nonwoven fabrics prepared in Examples 10-12 all have excellent antibacterial and deodorizing properties, with an antibacterial rate as high as 86-92%, and all of them are completely odorless, showing varying degrees of improvement compared to Comparative Example 1.

[0115] Based on the data from the various embodiments, it can be seen that the preferred weight ratio of soybean fiber to phosphate aqueous solution is 1:(1.0-1.5). This is because the purpose of using phosphate is mainly to ensure the pretreatment effect of soybean fiber, but the fiber structure should not be damaged due to excessive acid corrosion.

[0116] Examples 13-15

[0117] A nonwoven fabric for removing odors, deodorizing, and absorbing color is different from that in Example 1 in that the odor-removing, deodorizing, and color-absorbing fibers used are different, and the specific correspondence is shown in the table below.

[0118] Table: Comparison of the application of odor-removing, deodorizing, and color-absorbing fibers in Examples 13-15

[0119] Group Odor-removing, deodorizing, and color-absorbing fibers Example 13 Prepared from Preparation Example 13 Example 14 Prepared from Preparation Example 14 Example 15 Prepared from Preparation Example 15

[0120] Extract the color-absorbing nonwoven fabrics prepared in Examples 13-15 above, and test their antibacterial rate and odor according to the above measurement steps. The average value of the test results is recorded in the table below.

[0121]

[0122] As can be seen from the table above, the deodorizing and color-absorbing nonwoven fabrics prepared in Examples 13-15 all have excellent antibacterial and deodorizing properties, with an antibacterial rate as high as 85-92%, and all of them are completely odorless, showing varying degrees of improvement compared to Comparative Example 1.

[0123] Based on the data from the various embodiments, it can be seen that the preferred treatment conditions for heating and mixing are: mixing at 60-80℃ for 30-60 minutes. The main purpose is to accelerate the pretreatment process of phosphate on soybean fiber. However, if the temperature is too high, it is still easy to affect the original fiber structure together with acid corrosion.

[0124] Examples 16-18

[0125] A nonwoven fabric for removing odors, deodorizing, and absorbing color is different from that in Example 1 in that the odor-removing, deodorizing, and color-absorbing fibers used are different, and the specific correspondence is shown in the table below.

[0126] Table: Comparison of the application of odor-removing, deodorizing, and color-absorbing fibers in Examples 16-18

[0127]

[0128]

[0129] Comparative Example 2

[0130] A color-absorbing nonwoven fabric differs from Example 1 in that the raw materials and preparation method for the odor-removing and deodorizing color-absorbing fibers are different, as detailed below:

[0131] S1. First, place soybean fiber in a 5.0% phosphate aqueous solution at a weight ratio of 1:1 and stir at 60°C for 60 minutes. The phosphate is sodium pyrophosphate.

[0132] S2. Then, the soybean fiber treated by S1 is mixed with silver ammonia emulsion at a weight ratio of 1:2. After the mixture is evenly mixed, it is dehydrated and dried to obtain the deodorizing, color-absorbing fiber.

[0133] Except for the absence of cationic surfactants, the amount and selection of other components in the silver ammonia emulsion are the same as in Example 1.

[0134] The color-absorbing nonwoven fabrics prepared in Examples 16-18 and Comparative Example 2 were extracted and their antibacterial rate and odor were tested according to the above measurement steps. The average value of the test results was recorded in the table below.

[0135]

[0136] As can be seen from the table above, the deodorizing and color-absorbing nonwoven fabrics prepared in Examples 16-18 all have excellent antibacterial and deodorizing properties, with an antibacterial rate as high as 92-93%, and all of them are completely odorless, showing varying degrees of improvement compared to Comparative Example 2.

[0137] Based on the data from the above embodiments, the reason is that the main purpose of the cationic surfactant is not only to ensure the composite effect of soybean fiber and silver ammonia emulsion, but also to promote the complexation reaction of amino acrylate and silver nitrate. Therefore, the performance of the missing group is significantly reduced.

[0138] Furthermore, from Examples 1 and 16-18, it can be seen that the preferred amount of the cationic surfactant is 0.3-0.5%, and it should be selected from one or more of polyquaternium salt-7, polyquaternium salt-10, polyquaternium salt-16 and polyquaternium salt-37, with the higher the charge density of the polyquaternium salt within this range, the better.

[0139] Examples 19-21

[0140] A nonwoven fabric for removing odors, deodorizing, and absorbing color is different from that in Example 1 in that the odor-removing, deodorizing, and color-absorbing fibers used are different, and the specific correspondence is shown in the table below.

[0141] Table: Comparison of the application of odor-removing, deodorizing, and color-absorbing fibers in Examples 19-21

[0142] Group Odor-removing, deodorizing, and color-absorbing fibers Example 19 Prepared from Preparation Example 19 Example 20 Prepared from Preparation Example 20 Example 21 Prepared from Preparation Example 21

[0143] Comparative Example 3

[0144] A nonwoven fabric differs from Example 1 in that the raw materials and preparation method for the odor-removing, deodorizing, and color-absorbing fibers used are different, as detailed below:

[0145] Soybean fiber was placed in a 5.0% phosphate aqueous solution at a weight ratio of 1:1 and stirred at 60°C for 60 minutes. The phosphate was sodium pyrophosphate, thus obtaining the woven fabric fiber.

[0146] The color-absorbing nonwoven fabrics prepared in Examples 19-21 and Comparative Example 3 were extracted and their antibacterial rate and odor were tested according to the above measurement steps. The average value of the test results was recorded in the table below.

[0147]

[0148] As can be seen from the table above, the deodorizing and color-absorbing nonwoven fabrics prepared in Examples 19-21 all have excellent antibacterial and deodorizing properties, with an antibacterial rate as high as 88-92%, and basically no odor is produced. Compared with Comparative Example 3, they all have different degrees of improvement.

[0149] In summary, based on Examples 1 and 29-21, it can be seen that the weight ratio of soybean fiber treated by S1 to silver ammonia emulsion is 1:(2-3), and the proportion of silver ammonia emulsion should not be too high, otherwise it may affect the structural strength of the nonwoven fabric, which may lead to deformation and loss of effect after 5 cycles.

[0150] Furthermore, Comparative Example 3 also shows that although soybean fiber itself has certain antibacterial properties, its inhibition rate against Staphylococcus aureus can reach 78%, but due to its weak self-cleaning ability and its tendency to provide a breeding environment for bacteria, there is still a noticeable odor. It should also be noted that this group is essentially unsuitable for use as a color-absorbing fiber nonwoven fabric and is only used for comparative testing.

[0151] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A nonwoven fabric for removing odors, deodorizing, and absorbing color, characterized in that, The odor-removing, deodorizing, and color-absorbing fiber is prepared by the following steps: S1. First, place the soybean fiber in a phosphate solution and heat and stir. S2. Then, the soybean fiber treated by S1 is mixed with silver ammonia emulsion. After the mixture is evenly mixed, it is dehydrated and dried to obtain the deodorizing, color-absorbing fiber. The phosphate has a mass percentage of 5.0–8.0% in aqueous solution and is selected from one or more of sodium pyrophosphate, sodium hydrogen phosphate, and sodium trimetaphosphate; The weight ratio of soybean fiber to phosphate aqueous solution is 1:(1.0–1.5). The heating and mixing conditions are: mixing at 60–80℃ for 30–60 minutes; The silver ammonia emulsion is composed of the following components in weight percentage: 5-7% amino acrylate, 3-5% polyether diol, 1.0-3.0% silver nitrate, 0.3-0.5% cationic surfactant, and the balance being water; The cationic surfactant is one or more of polyquaternium-7, polyquaternium-10, polyquaternium-16, and polyquaternium-37; The weight ratio of soybean fiber treated with S1 to silver ammonia emulsion is 1:(2-3).

2. The method for preparing the odor-removing, deodorizing, and color-absorbing nonwoven fabric according to claim 1, characterized in that, Includes the following steps: 1) First, loosen the odor-removing, deodorizing, and color-absorbing fibers and comb them into a fiber web; 2) The fiber web is then reinforced and shaped using a hydroentangling method; 3) Finally, the reinforced and shaped fiber web is dried to obtain the odor-removing, deodorizing, and color-absorbing nonwoven fabric.

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