阅读说明：本技术 一种服装用仿真皮彩色功能纱线及其制备方法 (Leather-imitated color functional yarn for clothing and preparation method thereof ) 是由 张春华 张佳婧 夏良君 李晨 刘欣 徐卫林 于 2021-08-06 设计创作，主要内容包括：本发明提供了一种服装用仿真皮彩色功能纱线及其制备方法。采用湿法成型方法,以聚合物长丝为芯层,皮革粉体、功能纳米粒子及粘合剂复合构建出的壳层,制备出服装用仿真皮彩色功能纱线。本发明提供的制备方法,将皮革废料按照颜色进行分类,加工制备成不同颜色的皮革粉体,通过粘合剂将皮革粉体与纳米粒子通过湿法成型方式一同粘结在聚合物长丝上,形成芯/壳结构的仿真皮纱线。本发明方法充分利用了皮革废弃物的本体颜色,回收再利用了皮革颜色,在成型过程中直接利用纳米粒子,制备了彩色功能仿真皮革纱线,这种彩色纱线可以直接通过机织、针织或编织加工成纺织面料,更深层次节约能源及实现对废弃材料的资源化利用,具有显著的社会和经济效益。(The invention provides a leather-imitated color functional yarn for clothing and a preparation method thereof. The method adopts a wet forming method, takes polymer filaments as a core layer, and prepares the artificial leather colorful functional yarn for clothing by a shell layer which is constructed by compounding leather powder, functional nano particles and an adhesive. The preparation method provided by the invention classifies leather waste materials according to colors, processes the leather waste materials into leather powder with different colors, and bonds the leather powder and nano particles on the polymer filament together through an adhesive in a wet forming mode to form the core/shell structure simulated leather yarn. The method of the invention fully utilizes the body color of the leather waste, recycles the leather color, directly utilizes the nano particles in the forming process to prepare the color functional simulation leather yarn, and the color yarn can be directly processed into textile fabric through weaving, knitting or braiding, thereby saving energy sources more deeply and realizing the resource utilization of the waste materials, and having remarkable social and economic benefits.)

1. The utility model provides a clothing is with emulation skin color function yarn which characterized in that: based on a wet forming method, the artificial leather color functional yarn for the clothing is formed by mutually compounding a polymer filament core layer and a shell layer coated on the periphery of the polymer filament core layer;

the shell layer is formed by compounding leather powder, functional nanoparticles and an adhesive with a preset color and a preset particle size in percentage by mass, and the mass ratio of the leather powder to the functional nanoparticles to the adhesive is (10-35): (1-5): (15-35);

the performance parameters of the simulated leather color functional yarn for the clothing are as follows: the moisture absorption performance reaches 3.0 to 6.0 percent; the continuous length is any custom length; by compounding different types of nano particles, the realized functionality is one or more of self-cleaning, ultraviolet resistance, antibiosis and antivirus.

2. The artificial leather color functional yarn for the garment according to claim 1, wherein: the leather powder is prepared from waste leather; the waste leather is one or a combination of more of waste cowhide, waste sheepskin or waste pigskin;

the preparation process of the leather powder comprises the following steps: firstly, the waste leather with different colors is disinfected, pretreated and dried, and then classified according to colors, and then the classified waste leather is cut and processed into leather powder with different colors and the diameter of which is less than or equal to 30 mu m.

3. The artificial leather color functional yarn for the garment according to claim 1, wherein: the functional nano particles are one or a combination of more of titanium dioxide, cuprous oxide, copper oxide, zinc oxide, nano silver, copper and zinc; the particle size of the functional particles is less than or equal to 10 mu m.

4. The artificial leather color functional yarn for the garment according to claim 1, wherein: the adhesive is polyurethane.

5. The artificial leather color functional yarn for the garment according to claim 1, wherein: in the polymer filament core layer, the polymer is one or a combination of more of terylene, chinlon, vinylon, acrylon and polypropylene; the polymer filament is one of a surface oxidation modified polymer filament, a surface hydrolysis modified polymer filament and a surface grafting modified polymer filament.

6. The method for preparing the artificial leather color functional yarn for the clothes according to any one of claims 1 to 5, is characterized in that: the method comprises the following steps:

s1, modified polymer filament preparation: preparing polymer filaments with fiber surfaces subjected to oxidation modification, hydrolysis modification or grafting modification;

s2, preparing a shell layer solution: adding the leather powder, the functional nano particles and the adhesive into an organic solvent according to a predetermined proportion, mechanically stirring and uniformly mixing, and defoaming to obtain a shell solution;

s3, preparing the composite yarn: and (3) placing the modified polymer filament in the shell layer solution for dipping and coating treatment, then placing the modified polymer filament in a coagulating bath to solidify the shell layer high polymer, and then drying to obtain the imitation leather color functional yarn for clothing, which is formed by mutually compounding the polymer filament core layer and the shell layer coated on the periphery of the polymer filament core layer.

7. The method of claim 6, wherein: the coagulating bath is one of water, a mixed solution of water and a good polyurethane solvent and a mixture of water and alcohols; in the coagulating bath, the mass proportion of water is 95-100 wt%.

8. The method of claim 6, wherein: the shell layer solution is formed by mixing 10-35% of leather powder, 15-35% of adhesive polyurethane, 1-5% of functional nanoparticles and 30-74% of organic solvent in percentage by mass.

9. The method of claim 8, wherein: the organic solvent is one of a good solvent of polyurethane and a mixed solvent formed by mixing the good solvent of the polyurethane and a poor solvent; wherein the mass ratio of the polyurethane to the organic solvent is 1: (9-4); in the organic solvent, the mass ratio of the good solvent to the poor solvent is 9: (0 to 1).

10. The method of claim 6, wherein: the specific process of step S3 is: after the polymer filaments are subjected to dipping and coating treatment of the shell layer solution, silk guide holes with the aperture of 10-400 mu m are adopted, the shell layer high polymer is subjected to solidification treatment at the speed of 1-10 mm/s through a coagulation bath with the temperature set to 20-90 ℃, then, drying treatment is carried out at the temperature of 60-120 ℃, and the imitation leather color functional yarn for clothing is prepared.

Technical Field

The invention relates to the technical field of waste leather recovery and leather yarn preparation, in particular to a simulated leather color functional yarn for clothing and a preparation method thereof.

Background

The traditional leather material is mainly focused on a leather sheet layer in the field of clothing application, and because the length of leather is limited, the leather material can only be cut into long strips to be woven into ornaments, so that the application of the leather material in a wider range is severely limited. Meanwhile, in the process of processing leather, a large amount of leather waste is generated due to the requirements of procedures such as shaving, edge looping and the like, and in addition, in the process of manufacturing leather into clothes textiles and decorative textiles, a large amount of leather cutting waste is inevitably generated due to different shapes of required leather products. In addition, the leather products have a certain service life, and the used leather products are damaged into leather garbage after being worn.

At present, the leather waste treatment method mainly comprises an incineration method and a chemical treatment method, wherein the incineration method wastes natural resources and pollutes the environment, and the chemical treatment method mainly recycles collagen by a method of intensively extracting collagen, but is difficult to obtain collagen with higher purity, has high production cost in the extraction process, is easy to generate secondary pollution, and causes great economic loss to China, so that the efficient recycling of the leather solid waste is urgently needed to be solved.

With the research and development of the ultramicro leather powder, the superfine pulverization of the leather waste is realized, and the application field of the solid leather waste is widened, so that the method for reasonably and efficiently utilizing the ultramicro leather powder becomes a research focus.

The article published in the journal of Chinese leather, 2013, 2.3, 3 rd term of ultramicro leather powder surface modification and application research researches on different powders used for impregnating synthetic leather base cloth, discusses the influence of wood powder, ultramicro leather powder, maleic anhydride modified ultramicro leather powder and the dosage thereof on the film forming performance of a polyurethane composite film, and shows that after the modified ultramicro leather powder is used for a polyurethane film, various film forming performances are improved, but the addition amount of the ultramicro leather powder is not more than 20 percent and only used for preparing the polyurethane film.

The invention patent with the publication number of CN110229353A provides a method for improving the interface performance and the mechanical property of an organic powder-polyurethane composite material. The preparation process comprises the steps of preparing a polyurethane composite solution, preparing a coagulating bath, blade coating the polyurethane composite solution, performing phase inversion molding and drying treatment; according to the method, on the premise of not changing the preparation process of the organic powder-polyurethane composite material, the unmodified organic powder can be well and uniformly dispersed in a polyurethane solution by adopting a ternary mixed solvent compounded by a poor solvent of polyurethane, N-dimethylformamide and a solvent with polarity lower than that of the N, N-dimethylformamide. However, the method has the problems of small addition amount of organic powder, compact structure of the prepared composite membrane, improvement of the interfacial bonding force between the filler particles and the high molecular polymer matrix, and unsuitability for the addition of a large amount of leather powder and the preparation of continuous simulated leather yarns with strong moisture absorption capacity of leather-like microporous structures.

In conclusion, the method can not realize the free weaving of the material prepared from the leather powder as the traditional yarn, thereby seriously restricting the application range of the leather powder and being incapable of meeting the requirement of practical application.

In view of the above, there is a need for an improved artificial leather color functional yarn for clothing and a method for preparing the same to solve the above problems.

Disclosure of Invention

The invention aims to provide an adaptive sucker for tightly and firmly adsorbing a workpiece with an uneven surface.

In order to achieve the aim, the invention provides the artificial leather color functional yarn for the clothes. Based on a wet forming method, the artificial leather color functional yarn for the clothing is formed by mutually compounding a polymer filament core layer and a shell layer coated on the periphery of the polymer filament core layer;

the shell layer is formed by compounding leather powder, functional nanoparticles and an adhesive with a preset color and a preset particle size in percentage by mass, and the mass ratio of the leather powder to the functional nanoparticles to the adhesive is (10-35): (1-5): (15-35);

the performance parameters of the simulated leather color functional yarn for the clothing are as follows: the moisture absorption performance reaches 3.0 to 6.0 percent; the continuous length is any custom length; by compounding different types of nano particles, the realized functionality is one or more of self-cleaning, ultraviolet resistance, antibiosis and antivirus.

As a further improvement of the invention, the leather powder is prepared from waste leather; the waste leather is one or a combination of more of waste cowhide, waste sheepskin or waste pigskin;

the preparation process of the leather powder comprises the following steps: firstly, the waste leather with different colors is disinfected, pretreated and dried, and then classified according to colors, and then the classified waste leather is cut and processed into leather powder with different colors and the diameter of which is less than or equal to 30 mu m.

As a further improvement of the invention, the functional nanoparticles are one or more of titanium dioxide, cuprous oxide, copper oxide, zinc oxide, nano silver, copper and zinc; the particle size of the functional particles is less than or equal to 10 mu m.

As a further development of the invention, the binder is polyurethane.

As a further improvement of the invention, in the polymer filament core layer, the polymer is one or a combination of more of terylene, chinlon, vinylon, acrylon and polypropylene; the polymer filament is one of a surface oxidation modified polymer filament, a surface hydrolysis modified polymer filament and a surface grafting modified polymer filament.

In order to achieve the purpose, the invention also provides a preparation method of the artificial leather color functional yarn for the clothes, which comprises the following steps:

s1, preparing polymer filaments with fiber surfaces subjected to oxidation modification, hydrolysis modification or grafting modification;

s2, preparing a shell layer solution: adding the leather powder, the functional nano particles and the adhesive into an organic solvent according to a predetermined proportion, mechanically stirring and uniformly mixing, and defoaming to obtain a shell solution;

s3, preparing the composite yarn: and (3) placing the modified polymer filament in the shell layer solution for dipping and coating treatment, then placing the polymer filament in a coagulating bath for shell layer adhesive high polymer curing treatment, and then drying to obtain the imitation leather color functional yarn for clothing, wherein the imitation leather color functional yarn is formed by mutually compounding a polymer filament core layer and a shell layer coated on the periphery of the polymer filament core layer.

As a further improvement of the invention, the coagulating bath is one of water, a mixed solution of water and a good solvent for polyurethane, and a mixture of water and alcohols; in the coagulating bath, the mass proportion of water is 95-100 wt%.

As a further improvement of the invention, the shell solution is formed by mixing 10-35% of leather powder, 15-35% of adhesive polyurethane, 1-5% of functional nanoparticles and 30-74% of organic solvent by mass percentage.

In a further improvement of the present invention, the organic solvent is one of a good solvent of polyurethane and a mixed solvent formed by mixing the good solvent of polyurethane and a poor solvent; wherein the mass ratio of the polyurethane to the organic solvent is 1: (9-4); in the organic solvent, the mass ratio of the good solvent to the poor solvent is 9: (0 to 1).

As a further improvement of the invention, the good solvent is one or a combination of two of N, N-dimethylacetamide and dimethylsulfoxide in different proportions; the poor solvent is one or the combination of two of toluene, acetone and the like in different proportions.

As a further improvement of the present invention, the specific process of step S3 is: and (2) after dipping treatment of the shell solution, adopting a silk guide hole with the aperture of 10-400 mu m, carrying out shell solidification treatment at the speed of 1-10 mm/s by a solidification bath with the temperature set to 20-90 ℃, and then, drying treatment at the temperature of 60-120 ℃ to prepare the artificial leather color functional yarn for clothing.

The invention has the beneficial effects that:

1. the invention provides a garment-used artificial leather color functional yarn, which is prepared by adopting a wet forming method, taking a polymer filament subjected to surface modification treatment as a core layer and compounding a predetermined color leather powder, functional nano particles and an adhesive to form a shell layer, wherein the shell layer is formed by compounding the predetermined color leather powder, the functional nano particles and the adhesive. The method for preparing the artificial leather color functional yarn for the clothing can recover wastes in the leather making process, can be primary leather leftovers, can also be secondary and repeated leather wastes, has the recovery efficiency as high as 98 percent compared with the traditional chemical method, and cannot generate secondary pollutants; on one hand, pollution caused by waste treatment by a chemical method and an incineration method can be reduced, on the other hand, leather powder prepared by recovery and regeneration by a physical method can keep the original good structure and performance of leather, and the sustainable development of solid waste can be really realized. Meanwhile, the color of leather waste is recycled, the problems of energy waste and environmental pollution caused by links such as decolorization are solved, the dyeing and finishing links in the subsequent processes of yarn preparation are reduced, and the colored yarn can be selectively and directly prepared according to the actual application requirements, so that the color yarn is more green and environment-friendly.

2. According to the preparation method of the artificial leather color functional yarn for the clothes, provided by the invention, in the prepared core-shell structure artificial leather yarn, the shell layer contains leather powder prepared from genuine leather, and the artificial leather yarn has genuine leather texture, genuine leather hand feeling and corresponding performance. Meanwhile, functional nanoparticles are added to the shell layer, so that the simulated leather yarn is endowed with good self-cleaning property, ultraviolet resistance and antibacterial property, and the application of the leather yarn is further widened. In addition, the high polymer filament of the core layer has good mechanical property, so that the leather yarn has good mechanical property, and the high-quality recycling application of the waste leather material is realized.

3. According to the artificial leather color functional yarn for the clothes, the organic leather powder and the inorganic nanoparticles are bonded on the polymer filament together through the adhesive polyurethane based on a wet forming mode, so that the organic leather powder and the inorganic nanoparticles are uniformly distributed on the surface of the core layer of the polymer filament, the interface combination between the leather powder particles and the adhesive is effectively improved, the mechanical property of the composite yarn is further improved, meanwhile, the micro-nano structure formed by the inorganic nanoparticles on the surface of the polymer filament and the functional characteristics of the inorganic nanoparticles endow the artificial leather color yarn for the clothes with more functional characteristics, and the yarn has more diversified functions and has larger application space.

Meanwhile, the invention also carries out surface modification treatment on the polymer filament, is used for enhancing the composite strength of the core layer polymer filament, the shell layer leather powder, the inorganic nano particles and the adhesive, and prepares the service-resistant, especially wear-resistant, artificial leather color functional yarn.

The invention adopts the polyurethane matrix solution with better interface compatibility with the leather powder, so that the shell solution still has certain viscosity and fluidity under the condition of higher content of the leather powder, so that the polymer filament surface subjected to surface modification treatment is compounded and forms a composite shell with high content of the leather powder, and the technical defect that the filament cannot be formed into filaments or cannot be reconstructed into fibers due to high-proportion leather powder filling in the prior art is effectively overcome.

4. Compared with the traditional leather which can only be made into a leather surface layer or cut into thin strips to be woven into an ornament, the artificial leather color functional yarn for the clothes prepared by the method provided by the invention fully utilizes the elastic micropore structure generated after the binder is desolvated, endows the artificial leather yarn with good flexibility and continuous length, has good weaving property and weaving property, can realize good application of the artificial leather yarn material in the field of clothes, fully displays the style and excellent performance of the leather material, and has wide market demand and application prospect in the field of textile clothes.

5. The preparation method of the artificial leather color functional yarn for the clothing, provided by the invention, has the advantages of simple process, low equipment requirement, convenience in operation and control, easiness in realization of large-scale industrial production, no need of special equipment, economy and environmental friendliness, and remarkable social and economic benefits.

Drawings

Fig. 1 is a real object diagram of the artificial leather color functional yarn for clothing provided by the invention.

FIG. 2 is an electron microscope (1 μm scale) of the artificial leather color functional yarn for clothing according to the present invention.

FIG. 3 is an electron microscope image (1 μm scale) of the artificial leather color functional yarn for clothing according to the present invention.

FIG. 4 is an electron microscope image (10 μm scale) of the artificial leather color functional yarn for clothing according to the present invention.

Fig. 5 is a comparison graph of moisture regain of the artificial leather of comparative example 4 and the polyester yarn of comparative example 1 and the artificial leather of the present invention, and the artificial leather of the present invention are used for clothing with different leather powder contents.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention provides a preparation method of a leather-imitated color functional yarn for clothing, which comprises the following steps:

s1, preparing polymer filaments with fiber surfaces subjected to oxidation modification, hydrolysis modification or grafting modification;

s2, preparing a shell layer solution: adding the leather powder, the functional nano particles and the adhesive into an organic solvent according to a predetermined proportion, mechanically stirring and uniformly mixing, and defoaming to obtain a shell solution;

s3, preparing the composite yarn: and (3) placing the modified polymer filament in the shell solution for dipping and compounding, then placing in a coagulating bath for shell solidification, and then drying to obtain the imitation leather color functional yarn for clothing, which is formed by mutually compounding a polymer filament core layer and a shell layer coated on the periphery of the polymer filament core layer.

Preferably, the coagulating bath is one of water, a mixed solution of water and a good polyurethane solvent, and a mixture of water and alcohols; in the coagulating bath, the mass proportion of water is 95-100 wt%.

Preferably, the shell solution is formed by mixing 10-35% of leather powder, 15-35% of adhesive polyurethane, 1-5% of functional nanoparticles and 30-74% of organic solvent in percentage by mass.

Preferably, the organic solvent is one of a good solvent of polyurethane and a mixed solvent formed by mixing the good solvent of polyurethane and a poor solvent; wherein the mass ratio of the polyurethane to the organic solvent is 1: (9-4); in the organic solvent, the mass ratio of the good solvent to the poor solvent is 9: (0 to 1).

Preferably, the specific process of step S3 is: and (2) after dipping treatment of the shell solution, adopting a silk guide hole with the aperture of 10-400 mu m, carrying out shell solidification treatment at the speed of 1-10 mm/s by a solidification bath with the temperature set to 20-90 ℃, and then, drying treatment at the temperature of 60-120 ℃ to prepare the artificial leather color functional yarn for clothing.

The present invention will be described in detail with reference to specific examples.

Example 1

The embodiment 1 of the invention provides a preparation method of a leather-imitated color functional yarn for clothing, which comprises the following steps:

s1, modified polymer filament preparation: preparing polymer polyester filament yarns with fiber surfaces subjected to oxidation modification, hydrolysis modification or grafting modification;

the specific modification process of the polyester filament yarn comprises the following steps:

this example describes the graft modification of absolute ethanol with a silane coupling agent as follows: 3 preparing a solution, then immersing the polymer polyester filament yarns into the solution, washing the treated polymer polyester filament yarns by using absolute ethyl alcohol after treating for a certain time (30min, 60min and the like), and then putting the treated polymer polyester filament yarns into a blast oven for fully drying.

The modified polymer polyester filament can effectively improve the wettability and cohesiveness of the fiber surface, thereby improving the interface bonding performance of the fiber surface and resin and achieving the aim of enhancing the composite strength of the core polymer polyester filament of the artificial leather color functional yarn, shell layer leather powder and an adhesive. That is, the polymer filaments are modified to increase the composite strength of the core layer and the shell layer.

S2, preparing a shell layer solution: adding 30% of leather powder, 2% of nano-silver particles and 15% of adhesive polyurethane into 53% of organic solvent (N, N-dimethylacetamide) according to mass percentage, mechanically stirring and uniformly mixing, and defoaming to obtain a shell solution;

wherein the leather powder is light gray cow leather powder with the grain diameter less than or equal to 30 mu m, and the preparation process comprises the following steps: firstly, the discarded and recovered cow leathers with different colors are respectively cut into about 1cm after being disinfected, pretreated and dried²And finally, processing the blocks with different sizes into leather powder with different color classifications by using self-made equipment, wherein the recovery efficiency of the waste cow leather is as high as more than 98%.

S3, preparing the composite yarn: after the polymer filament subjected to modification treatment is placed in the shell layer solution for dipping and compounding treatment, the shell layer is subjected to desolvation and solidification treatment by adopting a wire guide hole with the aperture of 200 mu m in a coagulation bath (water) with the temperature set to be 60 ℃ at the speed of 5mm/s, and then the shell layer is placed in a drying oven at the temperature of 80 ℃ for drying treatment, so that the artificial leather color functional yarn for clothing (shown in figure 1) formed by mutually compounding the polymer filament core layer and the shell layer coated on the periphery of the polymer filament core layer is prepared.

Referring to the electron microscope images shown in fig. 2-4, it can be seen that the leather powder is uniformly distributed in the binder, and the binder is connected with the polyester yarn through a network, which indicates that the interface between the core layer and the shell layer is well combined, and the electron microscope images of the yarn surface can obviously observe the microporous structure, and the microporous structures of different sizes and the leather powder can directionally regulate and control the moisture permeability and air permeability of the yarn.

The simulated leather color functional yarn for clothing prepared in example 1 was subjected to functional testing, and the performance parameters were as follows: the moisture regain is 4.52 percent; the breaking strength is 13.12N; the continuous length is any length required to be customized; the functions realized by compounding the nano silver particles are ultraviolet resistance and antibiosis.

Comparative example 1

The modified polymer polyester filament provided in step S1 was used as a first set of blank comparative examples.

Comparative example 2

The difference from example 1 is that: the polymer filaments in step S1 were not subjected to modification treatment.

Comparative example 3

The difference from example 1 is that: in step S2, no functional nanoparticles are added.

Comparative example 4

Artificial leather was used as a second set of blank comparative examples.

Examples 2 to 6

The difference from example 1 is that: in the shell solution, the mass ratio of the leather powder to the polyurethane is different, the ratio of the polyurethane to the organic solvent is different, the ratio of the good solvent to the poor solvent in the organic solvent is different, and the rest is the same as that in example 1, and thus the details are not repeated. (good solvent is N, N dimethyl acetamide; poor solvent is acetone)

Table 1 shows the process parameters and performance parameters of examples 1-6 and comparative example 1

The analysis was performed in conjunction with table 1:

1) the influence of the mass ratio of the leather powder and the polyurethane on the performance of the prepared simulated leather color functional yarn for the clothes is as follows: from the above table, it can be seen that, when the proportion of the leather powder is increased, the moisture absorption performance of the yarn is remarkably improved, and the mechanical property is reduced to a certain extent. The moisture regain of the leather powder as a natural protein material is increased along with the increase of the powder, but the addition of the powder penetrates through the adhesive, so that the adhesive generates rich phase and poor phase integrally, and when the amount of the leather powder is proper, the leather powder forms a network structure in the adhesive, so that the yarn has good moisture absorption capacity and mechanical property.

Referring to fig. 5, the moisture regain of the yarn with different leather powder content provided in examples 1 to 3 is much higher than that of the polyester yarn and the artificial leather provided in comparative examples 1 and 4, indicating that the yarn provided in the examples of the present invention has excellent moisture absorption performance.

2) The influence of the ratio of the polyurethane to the organic solvent on the performance of the prepared simulated leather color functional yarn for clothing is as follows: as can be seen from the above table, when the ratio of the polyurethane to the organic solvent is increased, the moisture absorption performance of the yarn is slightly different, and the mechanical properties are partially different. The reason is that the shell layer curing speed of the surface of the polyester yarn is inconsistent, so that the microstructure of the surface of the yarn is formed. When the ratio of polyurethane to organic solvent is increased, the curing rate of the shell layer is faster, so that the moisture absorption performance is slightly reduced, and the mechanical property is enhanced, but the difference is not very large, which is caused by the microstructure of the shell layer.

3) The influence of the proportion of the good solvent and the poor solvent in the organic solvent on the performance of the prepared simulated leather color functional yarn for clothing is as follows: as can be seen from the above table, when the poor solvent is increased, the mechanical properties of the yarn are enhanced because the system of the good solvent and the poor solvent reduces the amount of micropores in the polyurethane system, so that the mechanical properties are enhanced, but at the same time, the moisture absorption performance is reduced because the porosity is reduced.

Examples 7 to 11

The difference from example 1 is that: the process parameters in step S3 are set differently, and the rest are the same as those in embodiment 1, and are not described again here.

Table 2 shows the process parameters and performance parameters of example 1 and examples 7-11

Examples	Coagulating bath	Rate of speed	Freezing temperature	Moisture regain	Breaking force
						Example 1	Water (W)	5mm/s	30℃	4.52％	13.12N
Example 7	95% of water: 5% ethanol	5mm/s	30℃	4.49％	13.81N
						Example 8	90% of water: 10% ethanol	5mm/s	30℃	4.40％	14.15N
Example 9	Water (W)	8mm/s	30℃	4.50％	12.89N
						Example 10	Water (W)	10mm/s	30℃	4.48％	12.77N
Example 11	Water (W)	5mm/s	60℃	4.55％	12.88N

Analysis was performed in conjunction with table 2:

1) the influence of the coagulation bath type on the performance of the prepared simulated leather color functional yarn for the clothes is as follows:

from the above table, when the kind of the coagulating bath is changed, when the content of ethanol in the coagulating bath is increased, the moisture regain is reduced, and the mechanical property is enhanced, because the affinity of ethanol and N, N dimethylacetamide is lower than the affinity of ethanol and water, so that the coagulating speed is changed, the micropores in the polyurethane coagulating process become small, the micropores tend to be regularly arranged, the uniformity of the material is enhanced, the moisture absorption property is reduced, and the mechanical property is enhanced.

2) The influence of the winding speed on the performance of the prepared simulated leather color functional yarn for clothing is as follows:

as can be seen from the above table, when the winding rate is increased, the solidification rate is increased due to the change of the yarn surface loading amount, the moisture regain change is small, and the mechanical property is slightly reduced, because the amount of the polyester surface shell layer of the core layer is increased due to the increase of the solidification rate, the moisture absorption property is reduced, and meanwhile, the mechanical property is reduced.

3) The influence of the solidification temperature on the performance of the prepared simulated leather color functional yarn for the clothes is as follows:

as can be seen from the above table, when the solidification temperature changes, the mechanical properties of the yarn decrease with the increase of the temperature, because the solidification temperature increases, the molecular movement speed increases, the phase displacement is severe, the finger-shaped holes are generated, and the micropores are randomly arranged, so that the randomness of the polyurethane is enhanced, and the mechanical properties decrease.

In conclusion, the invention provides the artificial leather color functional yarn for the clothes and the preparation method thereof. And (3) adopting a wet forming method, taking the polymer filament as a core layer, and compounding the leather powder, the functional nano particles and the adhesive to construct a shell layer to prepare the artificial leather color functional yarn for clothing. The preparation method provided by the invention classifies leather waste materials according to colors, processes the leather waste materials into leather powder with different colors, and bonds the leather powder and nano particles on the polymer filament together through an adhesive in a wet forming mode to form the core/shell structure simulated leather yarn. The method of the invention fully utilizes the body color of the leather waste, recycles the leather color, directly utilizes the nano particles in the forming process to prepare the color functional simulation leather yarn, and the color yarn can be directly processed into textile fabric through weaving, knitting or braiding, thereby saving energy sources more deeply and realizing the resource utilization of the waste materials, and having remarkable social and economic benefits.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.