Anti-yellowing finishing method for cashmere products, processing technology of cashmere fabric and processing technology of cashmere loose fibers

Abstract

The invention relates to the technical field of textile, in particular to a cashmere product anti-yellowing finishing method, a cashmere fabric processing technology and a cashmere loose fiber processing technology. The anti-yellowing finishing method for the cashmere products comprises the steps that the cashmere products to be finished are put into a container to be subjected to anti-yellowing treatment, an anti-yellowing auxiliary solution is added into the container, the dosage of the anti-yellowing auxiliary solution is 50-70 g / L, the bath ratio is 1: (15-20), dipping and rolling are conducted once, the temperature in a cylinder is 45-60 DEG C, the time is 5-10 min, and the liquid carrying rate is 58-63%; and performing high-temperature setting treatment on the cashmere fabric subjected to the anti-yellowing treatment, wherein the setting temperature is 110-190 DEG C. The anti-yellowing treatment method is wide in application range, the anti-yellowing effect of the cashmere fabric treated through the method is improved, the treated cashmere fabric is bright in color, damage to cashmere fibers can be avoided, the strength loss of the treated cashmere fabric is small, and the hand feeling is not affected.

Description

Technical Field

[0001] The present disclosure relates to the field of textile technology, and in particular to a method for anti-yellowing finishing of cashmere products, a processing technology for cashmere fabrics, and a processing technology for cashmere bulk fibers. Background Art

[0002] Cashmere has excellent qualities and characteristics such as lightness, softness, tenderness and warmth. Its characteristics and value cannot be compared with other textile raw materials, and it has unique market recognition.

[0003] However, cashmere is a protein fiber primarily composed of keratin, which contains numerous chromophores from amino acid residues such as cystine (cross-linked by disulfide bonds), tyrosine, tryptophan, and phenylalanine. Protein chromophores contain unsaturated groups and chemical bonds that absorb light radiation and exhibit transitions. These chromophores and their chemical bonds undergo oxidation reactions upon contact with nitrogen oxides in the air. For example, tryptophan is excited to produce oxygen free radicals, which react with various amino acid residues to produce yellow substances. During processing, especially at high temperatures, the amino acids in protein fibers can oxidize with nitrogen oxides in the air, causing yellowing on the fabric surface and affecting product quality.

[0004] Therefore, how to prevent cashmere products from oxidizing and turning yellow during high-temperature shaping has become a technical problem that needs to be solved urgently. Summary of the Invention

[0005] In order to solve the problem in the prior art that cashmere products are prone to oxidation reactions when set at high temperatures, causing the cashmere products to turn yellow, the present disclosure provides a method for anti-yellowing finishing of cashmere products, a processing technology for cashmere fabrics, and a processing technology for cashmere bulk fibers.

[0006] In a first aspect, the present disclosure provides a method for anti-yellowing finishing of cashmere products, the method comprising: The cashmere product to be treated is placed in a container for anti-yellowing treatment, and an anti-yellowing auxiliary solution is added to the container. The dosage of the anti-yellowing auxiliary solution is 50-70 g / L, the bath ratio is 1:15-20, one dip and one pad, the temperature in the container is 45-60 ° C, the time is 5-10 minutes, and the liquid rate is 50%-70%; The cashmere products that have completed the anti-yellowing treatment are subjected to high-temperature setting treatment, with the setting temperature being 110-190°C.

[0007] In one embodiment of the present disclosure, the anti-yellowing additive solution includes water and a mixture of tricarboxylic acid, dicarboxylic acid and ethanolamine, wherein the water accounts for 75% and the mixture of tricarboxylic acid, dicarboxylic acid and ethanolamine accounts for 25%.

[0008] In one embodiment of the present disclosure, the anti-yellowing additive solution includes water and 5 nm anatase TiO2, wherein the water accounts for 85% and the 5 nm anatase TiO2 accounts for 15%.

[0009] In one embodiment of the present disclosure, the anti-yellowing additive solution includes water and ammonium citrate, wherein the water accounts for 90% and the ammonium citrate accounts for 10%.

[0010] In one embodiment of the present disclosure, the dosage of the anti-yellowing additive solution is 60 g / L.

[0011] In one embodiment of the present disclosure, the setting temperature is 150-170°C.

[0012] In one embodiment of the present disclosure, the liquid carrying rate is 60%.

[0013] In one embodiment of the present disclosure, the cashmere product is a white cashmere product or a light blue cashmere product.

[0014] In a second aspect, the present disclosure also provides a processing technology for cashmere fabrics, which includes the following steps: grey cloth - washing and shrinking - cooking - anti-yellowing finishing - steaming - pressing - finished product, wherein the anti-yellowing finishing adopts any one of the above-mentioned anti-yellowing finishing methods for cashmere products.

[0015] In one embodiment of the present disclosure, the cashmere fabric is a mixture of cashmere, wool and mulberry silk.

[0016] In a third aspect, the present disclosure also provides a processing technology for cashmere bulk fibers, which includes the following steps: raw materials - combing - bulk fiber dyeing - anti-yellowing finishing - wool - spinning - weaving - finishing - finished product, wherein the anti-yellowing finishing adopts the anti-yellowing finishing method for cashmere products according to any one of the above claims.

[0017] One beneficial effect of the present disclosure is that the anti-yellowing finishing method for cashmere products provided by the present disclosure includes placing the cashmere product to be finished into a container for anti-yellowing treatment, adding an anti-yellowing auxiliary solution into the container, the dosage of the anti-yellowing auxiliary solution is 50-70 g / L, the bath ratio is 1:15-20, one immersion and one rolling, the temperature in the vat is 45-60°C, the time is 5-10 minutes, and the liquid rate is 58%-63%; the cashmere fabric that has completed the anti-yellowing treatment is subjected to high-temperature setting treatment, and the setting temperature is 110-190°C.

[0018] This anti-yellowing treatment method has a wide range of applications, and the cashmere fabric treated by this method not only improves the anti-yellowing effect, but also has bright colors and can avoid damage to cashmere fibers. The cashmere fabric loses little strength after treatment and does not affect the feel.

[0019] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] Figure 1 This is a schematic diagram of a process for finishing cashmere fabrics according to an embodiment of the present disclosure; Figure 2 The present invention is a schematic diagram of a process for producing cashmere fabrics according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0023] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0024] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0025] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0026] The specific embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0027] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0028] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the prerequisite for each other's existence.

[0029] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0030] For ease of understanding, the nouns involved below are explained here.

[0031] A mixture of tricarboxylic acid, dicarboxylic acid and ethanolamine: a multifunctional textile auxiliary system composed of polycarboxylic acids (tricarboxylic acids and dicarboxylic acids) and ethanolamine compounds, mainly used for fiber functional modification.

[0032] Bath ratio: Bath ratio is the ratio of the working liquid (such as dyeing liquid, finishing liquid) to the weight of the textile in the textile processing process. It is a key process parameter that affects the permeability of chemical reagents, reaction uniformity and energy consumption.

[0033] One dip and one pad: One dip and one pad is a highly efficient treatment process in textile dyeing and finishing. It refers to a continuous processing method in which the fabric is impregnated with working liquid, pressed by rollers, and then fixed by drying and baking. It is widely used in dyeing, waterproofing, anti-wrinkle and other functional finishing.

[0034] Liquid pick-up rate: The percentage of liquid weight absorbed by the fabric after padding to the dry weight of the fabric.

[0035] CIE LAB color space: A uniform color space developed by the International Commission on Illumination (CIE) in 1976 to quantify color differences perceived by the human eye. It is an international standard for color measurement in industries such as textiles, printing, and coatings.

[0036] DE: Total color difference, indicating the overall difference between the sample and the standard color (CIE Lab color space). Evaluation criteria: DE < 1 is almost indistinguishable to the human eye; 1 < DE < 2 is noticeable to professionals but may be overlooked by ordinary consumers; DE > 3 is a significant color difference, requiring process adjustments.

[0037] DL: Lightness difference. A positive value indicates that the color is brighter (whiter) than the standard color, and a negative value indicates that the color is darker (blacker).

[0038] Da: The difference between red and green, positive values ​​are redder and negative values ​​are greener.

[0039] Db: Yellow-green phase difference, positive value is yellowish, negative value is bluish.

[0040] Dc: Chroma difference, saturation difference, indicates the change in color vividness, positive values ​​are brighter, negative values ​​are darker.

[0041] Dh: Hue difference, which indicates the change in color hue. A positive value on the hue circle indicates a clockwise shift, while a negative value indicates a counterclockwise shift.

[0042] Strength: It indicates the percentage of the dye's coloring ability relative to the standard product, reflecting the color depth at the same dosage.

[0043] Gray card grade: The degree of color difference between the sample after testing and the original sample. The higher the grade, the closer the color difference between the sample and the original sample.

[0044] In order to solve the problem in the prior art that cashmere fabrics are prone to oxidation reactions when being set at high temperatures, resulting in yellowing of the cashmere fabrics, the present disclosure provides a method for anti-yellowing finishing of cashmere products, the method comprising: The cashmere products to be treated are placed in a container for anti-yellowing treatment, and an anti-yellowing auxiliary agent solution is added to the container. The dosage of the anti-yellowing auxiliary solution is 50-70 g / L, the bath ratio is 1:15-20, one immersion and one padding, the temperature in the container is 45-60°C, the time is 5-10 minutes, and the liquid rate is 50%-70%; the cashmere products that have completed the anti-yellowing treatment are subjected to high-temperature setting treatment, and the setting temperature is 110-190°C.

[0045] In practical applications, the anti-yellowing finishing method for cashmere products can be applied to the post-finishing of cashmere fabrics, and can also be applied to the cashmere after dyeing and before the wool mixing process.

[0046] When the anti-yellowing finishing method for cashmere products is applied to the post-finishing process of cashmere fabrics, the cashmere products to be finished refer to cashmere products that have undergone scouring, shrinking, and cooking. When the anti-yellowing finishing method for cashmere products is applied to cashmere fabrics after dyeing and before the wool mixing process, the cashmere products to be finished refer to cashmere products that have undergone carding, scouring, and loose fiber dyeing.

[0047] It should be noted that the cashmere products mentioned in the present disclosure include cashmere fabrics and cashmere knitwear. The cashmere fabrics mentioned in the present disclosure refer to a mixture of cashmere, wool, and mulberry silk. Specifically, the cashmere fabrics disclosed in the present disclosure refer to fabrics made of cashmere, wool, mulberry silk, etc. in any proportion; and the loose fibers disclosed in the present disclosure refer to fiber textile raw materials including cashmere, etc.

[0048] The present invention places cashmere products to be treated in a container, such as a dye vat or a padding tank, for anti-yellowing treatment of the cashmere products. An anti-yellowing agent solution is added to the container. The anti-yellowing agent solution is a mixture of water and an anti-yellowing agent in a certain proportion. The dosage of the anti-yellowing agent solution is controlled at 50-70 g / L, and the liquid temperature in the container is maintained at 45-60°C. The cashmere products are immersed in the container for 5-10 minutes, and the bath ratio is 1:15-20, that is, the ratio of the liquid volume in the container to the weight of the cashmere products is maintained at 1:15-20. After the dipping and padding, the liquid pick-up rate of the cashmere products is controlled to be in the range of 58%-63%.

[0049] The cashmere products that have undergone anti-yellowing treatment are then subjected to high-temperature setting treatment to rearrange the fiber molecular chains of the cashmere products, eliminate internal stress and stabilize the structure. During this process, the setting temperature is maintained at 110-190°C and the setting time is 5 minutes.

[0050] Through the above treatment, the anti-yellowing agent solution can form a protective layer on the surface of the cashmere fiber, thereby avoiding oxidation reaction with nitrogen oxide components in the air, so that the anti-yellowing effect of the cashmere is improved, and the cashmere products after treatment are bright in color, and can avoid damage to the cashmere fibers. After treatment, the cashmere fabric has little strength loss and does not affect the feel.

[0051] In one embodiment of the present disclosure, the anti-yellowing additive solution includes water and a mixture of tricarboxylic acid, dicarboxylic acid and ethanolamine, wherein the water accounts for 75% and the mixture of tricarboxylic acid, dicarboxylic acid and ethanolamine accounts for 25%.

[0052] In one embodiment of the present disclosure, the anti-yellowing additive solution includes water and 5 nm anatase TiO2, wherein the proportion of water is 85% and the proportion of 5 nm anatase TiO2 is 15%.

[0053] In one embodiment of the present disclosure, the anti-yellowing additive solution includes water and ammonium citrate, wherein the water accounts for 90% and the ammonium citrate accounts for 10%.

[0054] The anti-yellowing auxiliary agent solution used in the present invention isolates the nitrogen oxide components in the air from the cashmere amino acid free radicals, thereby protecting the cashmere fabric from oxidation.

[0055] Therefore, the anti-yellowing finishing method disclosed herein can significantly improve the color stability of cashmere products. It can also form a protective film on the fiber surface, protecting the amino and imine groups in nylon and spandex fibers from being destroyed and preventing them from oxidizing and yellowing during high-temperature setting.

[0056] Specifically, the parameters in the anti-yellowing finishing method are compared with several embodiments. It should be noted that the auxiliary solution in the following embodiments refers to a mixture of an anti-yellowing auxiliary agent and water; specifically, auxiliary solution 1 is an anti-yellowing auxiliary solution formed by a mixture of tricarboxylic acid, dicarboxylic acid and ethanolamine and water; auxiliary solution 2 refers to an anti-yellowing auxiliary solution formed by a mixture of ammonium citrate and water; auxiliary solution 3 refers to an anti-yellowing auxiliary solution formed by a high-activity nano-scale photocatalyst finishing agent of anatase type 5nm TiO2 and water; auxiliary solution a (b) means that the dosage of auxiliary solution a is bg / L, for example, auxiliary solution 1 (50) means that the dosage of auxiliary solution 1 is 50g / L.

[0057] Example 1: Parameters of the anti-yellowing finishing method: anti-yellowing agent solution 50g / L; temperature 45-60℃; one dip and one pad; bath ratio: 1:15-20; time: 5-10min; liquid carrying rate 60%; setting temperature 150℃.

[0058] Experimental sample composition: 94% cashmere 6% spandex; white; reactive dye.

[0059]

[0060] According to the test results of CIE LAB color space (CIELAB), it can be obtained that the De of the additive solution 1 (50) is improved by 0.76 compared with the case without adding the anti-yellowing additive solution, and the gray card grade is improved by half a level, that is, the EMT anti-yellowing finishing process is significantly improved by half a level.

[0061] Example 2: Anti-yellowing finishing process parameters: anti-yellowing agent solution 50g / L; temperature 45-60℃; one dip and one pad; bath ratio: 1:15-20; time: 5-10min; liquid pick-up rate 60%; setting temperature 150℃.

[0062] Experimental sample composition: 70% cashmere, 30% silk; cashmere blended knitted fabric; ice blue; acid dye.

[0063]

[0064] According to the CIE LAB color space (CIELAB) test results, it can be obtained that: compared with the case without adding the anti-yellowing auxiliary solution, the gray card grade of the anti-yellowing finishing process with the addition of auxiliary solution 1 increases from 3-4 to 4-5, that is, the anti-yellowing finishing process of auxiliary solution 1 is significantly improved by one level, with obvious difference.

[0065] Example 3: Anti-yellowing finishing process parameters: anti-yellowing agent 50g / L, 60g / L, 70g / L; temperature 45-60℃; one dip and one pad; bath ratio: 1:15-20; time: 5-10min; liquid rate 60%; setting temperature 150℃.

[0066] Experimental sample composition: 100% cashmere worsted woven fabric; white; acid dye.

[0067]

[0068] Based on the CIE LAB color space (CIELAB) test results, the anti-yellowing finishing process of additive solution 1 shows that the anti-yellowing finishing process with additive solution 50g / L has a slight improvement, with De increasing by 0.16. The anti-yellowing finishing process with additive solution 60g / L has an increase of De by 0.35. The anti-yellowing finishing process with additive solution 70g / L has a decrease in De value and an increase in Db value, and the yellowing is still reduced.

[0069] Therefore, in one embodiment of the present disclosure, the dosage of the anti-yellowing aid solution is 60 g / L.

[0070] Example 4: Anti-yellowing finishing process parameters: anti-yellowing agent solution 60g / L; temperature 45-60℃; one dip and one pad; bath ratio: 1:15-20; time: 5-10min; liquid pick-up rate 60%; setting temperature 150℃.

[0071] Experimental sample ingredients: cashmere blended woven fabrics, gray, blue, light blue, and white; cashmere blended knitted fabrics, flesh-colored, with reactive dyes.

[0072]

[0073] According to the above data, among the various light-colored fabrics subjected to high-temperature yellowing resistance, the most significant improvement in the process studied by the present invention is in the high-temperature yellowing resistance of white fabrics, followed by blue and light blue, which can reduce the effects of yellowing and yellow light.

[0074] The anti-yellowing effect of gray and flesh tones is not obvious, and in the overall CIE LAB color space, gray and flesh tones will reduce red light, and some will increase blue light.

[0075] As can be seen, the disclosed anti-yellowing finishing method for cashmere fabrics can prevent oxidation of cashmere, wool, mulberry silk, nylon, and spandex during high-temperature setting. It has a wide range of applications, not only for white but also for light blue greige fabrics dyed with reactive or acid dyes. Therefore, in one embodiment of the present disclosure, the cashmere product is a white cashmere product or a light blue cashmere product.

[0076] Embodiment 5: Anti-yellowing finishing process parameters: anti-yellowing agent solution 60g / L; temperature 45-60℃; one dip and one pad; bath ratio: 1:15-20; time: 5-10min; liquid pick-up rate 60%; setting temperature 110-190℃.

[0077] Experimental sample composition: cashmere blended woven fabric

[0078] According to the above data, it can be seen that using auxiliary solution 1 as an anti-yellowing auxiliary solution at high temperature setting of 150℃ and 170℃ can improve the yellowing effect of the fabric gray card rating by 1 level difference, and can significantly improve the degree of yellowing.

[0079] At 110°C, the yellowing degree of the fabric is relatively small, so anti-yellowing finishing is not required. At 130°C, there is also a significant color difference, but the difference is so small that non-professionals cannot perceive the color difference with the naked eye. The decision to use anti-yellowing finishing can be made based on the actual situation. High-temperature setting is not recommended above 190°C, as the yellowing degree is severe and the improvement effect of anti-yellowing finishing is reduced.

[0080] Therefore, in one embodiment of the present disclosure, the setting temperature of the high temperature setting is 150-170°C.

[0081] As mentioned above, the anti-yellowing finishing method of cashmere products disclosed herein can be applied in the post-finishing process of cashmere fabrics. Specifically, the present disclosure also provides a processing technology for cashmere fabrics, which includes the following steps: S110: Greige fabric; S120: washing and shrinking, configured to control the shrinkage rate of the grey cloth; S130: Boiling wool, which is configured to eliminate internal stress of wool by boiling in high temperature water and mechanical pressure; S140: Anti-yellowing finishing, which uses any of the above-mentioned anti-yellowing finishing methods for cashmere products; S150: Tank steaming, through steaming, the fabric shape is stabilized and not easily deformed, and the hand feel is rich, fluffy, and the appearance is glossy and soft; S160: Pressing, configured to set fabrics through triple action of heat, pressure and steam; S170: Finished product.

[0082] The anti-yellowing additive solution used in the present invention isolates the nitrogen oxide components in the air from the cashmere amino acid free radicals, thereby protecting the cashmere fabric from oxidation. Therefore, the anti-yellowing finishing method disclosed herein can significantly improve the color stability of cashmere fabrics. It can also form a protective film on the fiber surface, protecting the amino and imine groups in nylon and spandex fibers from being destroyed, preventing oxidation and yellowing during the high-temperature setting process.

[0083] In one embodiment of the present disclosure, the cashmere fabric is a mixture of cashmere, wool, and mulberry silk. Specifically, the cashmere fabric of the present disclosure refers to a fabric made from cashmere, wool, mulberry silk, and the like in any proportion. For example, a composition of 10% cashmere and 90% wool, or 50% cashmere and 50% mulberry silk, can all be adapted for this process. Furthermore, the cashmere fabric can also be a mixture of cashmere and spandex, such as 94% cashmere and 6% spandex.

[0084] The processing technology of the cashmere fabric provided by the present disclosure has a wide range of applications, and is not only applicable to a mixture of cashmere and spandex, but also to fabrics made of cashmere, wool, mulberry silk, etc. in any proportion.

[0085] In addition, the fabrics treated by the present invention have bright colors and can avoid damage to cashmere fibers. The strength loss of the fabric after treatment is small and does not affect the feel. The anti-yellowing component is long-lasting and can not only control high temperature anti-yellowing during the production process, but also maintain good effects in the yellowing caused by light and storage, which can extend the service life of the product. In addition, the anti-yellowing finishing method for cashmere products can also be applied to the cashmere after dyeing and before the wool treatment. Therefore, the present disclosure also provides a processing technology for cashmere bulk fiber, which includes the following steps: S200: Raw materials, the raw materials here are cashmere, cashmere, etc. S210: Carding, that is, combing, opening, mixing and directional arrangement of fibers through card clothing; S220: Washing the fleece to remove impurities in the raw materials; S230: loose fiber dyeing, configured to dye the fibers of the raw material; S240: Anti-yellowing finishing, the anti-yellowing finishing adopts any one of the above-mentioned anti-yellowing finishing methods for cashmere products.

[0086] At this point, the anti-yellowing treatment of bulk fibers is completed. The bulk fibers that have undergone anti-yellowing treatment can be processed into textiles through textile and other processes. In practical applications, the color of the loose fibers that have undergone anti-yellowing treatment is stable and can maintain good results even in the face of light yellowing and storage yellowing.

[0087] In practical applications, the following process can be used to process the anti-yellowing treated bulk fibers into finished textile products.

[0088] S250: Wool mixing, is configured to loosen, mix, add oil, and control moisture of the raw material fibers; S260: Spinning, configured to convert raw material fibers into yarn; S270: Weaving, weaving the yarn to form fabric; S280: Finishing, which is to optimize the performance of textiles, such as upgrading the surface texture of textiles or improving the dimensional stability of textiles; S290: Finished product.

[0089] The fabric produced by the present invention has good antioxidant ability, which can well protect the cashmere fabric from being oxidized and yellowing during high-temperature setting, and still maintains good whiteness and dyeability after high-temperature setting.

[0090] The processing technology of cashmere bulk fiber provided by the present disclosure performs anti-yellowing treatment on cashmere bulk fiber before spinning cashmere yarn, which can effectively reduce the yellowing effect generated during the production process and is also applicable to cashmere knitted products.

[0091] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, their practical applications, or technical improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A method for anti-yellowing finishing of cashmere products, characterized in that: The anti-yellowing finishing method for cashmere products comprises: The cashmere product to be treated is placed in a container for anti-yellowing treatment, and an anti-yellowing auxiliary solution is added to the container. The dosage of the anti-yellowing auxiliary solution is 50-70 g / L, the bath ratio is 1:15-20, one dip and one pad, the temperature in the container is 45-60 ° C, the time is 5-10 minutes, and the liquid rate is 50%-70%; The cashmere products that have completed the anti-yellowing treatment are subjected to high-temperature setting treatment, with the setting temperature being 110-190°C.

2. The anti-yellowing finishing method for cashmere products according to claim 1, characterized in that: The anti-yellowing additive solution includes water and a mixture of tricarboxylic acid, dicarboxylic acid and ethanolamine, wherein the water accounts for 75% and the mixture of tricarboxylic acid, dicarboxylic acid and ethanolamine accounts for 25%.

3. The anti-yellowing finishing method for cashmere products according to claim 1, characterized in that: The anti-yellowing additive solution includes water and anatase TiO2 (5 nm), wherein the water accounts for 85% and the anatase TiO2 (5 nm) accounts for 15%.

4. The anti-yellowing finishing method for cashmere products according to claim 1, characterized in that: The anti-yellowing additive solution includes water and ammonium citrate, wherein the water accounts for 90% and the ammonium citrate accounts for 10%.

5. The anti-yellowing finishing method for cashmere products according to claim 1, characterized in that: The dosage of the anti-yellowing auxiliary agent solution is 60g / L.

6. The anti-yellowing finishing method for cashmere products according to claim 1, characterized in that: The setting temperature is 150-170°C.

7. The anti-yellowing finishing method for cashmere products according to claim 1, characterized in that: The liquid carrying rate is 60%.

8. The anti-yellowing finishing method for cashmere products according to claim 1, characterized in that: The cashmere products are white cashmere products or light blue cashmere products.

9. A process for processing cashmere fabric, characterized in that: The processing technology of the cashmere fabric comprises the following steps: grey cloth - washing and shrinking - cooking - anti-yellowing finishing - tank steaming - pressing - finished product, wherein the anti-yellowing finishing adopts the anti-yellowing finishing method for cashmere products according to any one of claims 1 to 8.

10. The processing technology of cashmere fabric according to claim 9, characterized in that: Cashmere fabric is a mixture of cashmere, wool and mulberry silk.

11. A process for processing cashmere bulk fiber, characterized in that: The processing technology of the cashmere bulk fiber comprises the following steps: raw materials - carding - bulk fiber dyeing - anti-yellowing finishing, wherein the anti-yellowing finishing adopts the anti-yellowing finishing method for cashmere products according to any one of claims 1 to 8.

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