Animal leather fiber bundle with nanoscale branches, yarn, covering yarn and product

Abstract

The invention discloses an animal leather fiber bundle with nanoscale branches, yarn and a product, the animal leather fiber bundle with nanoscale branches comprises an animal leather fiber main body, and the animal leather fiber main body is a spinnable animal leather fiber main body; nanoscale branches are arranged on the animal leather fiber main body, the yarn is formed by animal leather fiber bundles with nanoscale branches, the covering yarn comprises core yarn and a skin layer, the skin layer comprises the animal leather fiber bundles with nanoscale branches, and the product is made of any one of the animal leather fiber main body, the yarn and the covering yarn. According to the invention, the material has independent and separated nano-scale branches, and has the characteristics of good antibacterial effect and capability of improving mechanical properties.

Description

[0001] This application is a divisional application of the application named Animal Leather Fiber Bundles with Nanoscale Branches, Yarns, Core-Spun Yarns and Products, with the application number 202010441933.X and the filing date of May 22, 2020. Technical Field

[0002] The present invention relates to animal leather fiber bundles, yarns and core-spun yarns, especially animal leather fiber bundles, yarns and core-spun yarns with nanoscale branches. Background Art

[0003] China's leather industry is an integral part of the light industry, which includes three natural industries: leather making, fur and leather products. The finished product of leather making is leather, which is the leather product of a de-haired animal; fur, also known as fur leather or fur coat, is the leather product of a furry animal; leather products are the deep-processed products of leather or fur, such as leather shoes, leather clothes, leather goods, etc. <>

[0004] Leather making refers to the process of subjecting raw hides to a series of physical and chemical processing treatments to change the properties and appearance of the raw hides and obtain leather.

[0005] Raw hides are peeled off from animals and mainly include the epidermis, dermis and subcutaneous tissue. Among them, the dermis is located under the epidermis, and its weight and thickness respectively account for more than 90% of the raw hide, which is the main part of the raw hide. The dermis is mainly composed of closely woven and connected collagen fibers, elastic fibers and reticular fibers. In addition, the dermis also contains some non-fibrous components, such as hair follicles, sweat glands, sebaceous glands, fat cells, muscles, blood vessels, lymphatic vessels and fibrous stroma, etc.

[0006] The above-mentioned collagen fibers are the main fibers in the dermis, which constitute the main body of the raw hide. The collagen fibers are composed of collagen and account for 95%-98% of the total fiber weight of the dermis.

[0007] The collagen fibers do not branch but aggregate into bundles. Its formation structure is as follows: Procollagen molecule → tropocollagen fibril (diameter 1.2~1.7nm) → subfibril (diameter 3~5nm) → fibril (diameter generally 20nm) → microfibril (diameter 2~5μm) → collagen fiber (diameter 20~150μm). The procollagen molecule is a right-handed composite helix structure formed by three left-handed helical collagen peptide chains. The collagen peptide chain consists of a helical chain and a non-helical terminal peptide connected thereto. Both the helical chain and the non-helical terminal peptide are composed of amino acid sequences. Although the amino acid composition and sequence of collagen vary to some extent due to different sources and collagen types, the composition of several main amino acids is generally the same, namely glycine, alanine, proline and hydroxyproline.

[0008] The formation process of collagen fibers is as follows: tropocollagen molecule → protofibril (diameter 1.2 - 1.7 nm) → subfibril (diameter 3 - 5 nm) → fibril (diameter generally 20 nm) → microfibril (diameter 2 - 5 μm) → collagen fiber (diameter 20 - 150 μm). However, in products such as the skin or leather of animals, the existing state of collagen fibers does not have independent and separate collagen fiber bundles with nanoscale branches.

[0009] The raw material of leather-making, "raw hide", has the following properties before processing: (1) The hide peeled from the animal body is wet. After drying, it becomes hard and loses its flexibility and softness, and is easily broken when bent.

[0010] (2) In a hot and humid temperature condition, the wet raw hide will quickly rot, lose hair, and emit an odor.

[0011] (3) In hot water above 65 °C, the raw hide will shrink, and the higher the temperature, the greater the degree of shrinkage.

[0012] (4) The air permeability and water vapor permeability of the raw hide are both poor, that is, the hygiene is poor.

[0013] (5) Under the action of chemical drugs, the raw hide is easily damaged.

[0014] Due to the above properties of the raw hide, the raw hide cannot be directly made into daily necessities for people to use. Therefore, people make the raw hide into leather through a series of physical and chemical treatments. Although leather is obtained by physical and chemical treatments of the raw hide, the morphology and structure of the collagen fiber bundles in leather are basically the same as those in the raw hide.

[0015] Leather obtained by processing the raw hide is favored by people because it will not become hard and brittle materials, will not rot, does not shrink, has good air permeability and water vapor permeability, and has good chemical resistance. However, when making leather products from leather, a large amount of scraps will appear. Due to the large generation of leather scraps, since the 1980s, due to the increasingly strict environmental protection regulations in developed countries, the reduction of landfill sites available for leather scraps, and the high cost of pollution treatment, on the one hand, developed countries have transferred their polluting industries to developing countries; on the other hand, they have also actively carried out research and application on the recycling of leather scraps. Especially since the 1990s, with the increasingly severe global ecological problems such as resources and the environment, the development of the leather industry is facing the challenge of the "sustainable development" strategy. Therefore, the resource utilization of leather scraps has now become an important topic of concern at home and abroad.

[0016] The recycling of leather scraps has a rather long history, but in the past, it did not attract the widespread attention of people inside and outside the industry. In the past 20 years, with the development of molecular biology and the in-depth understanding of collagen and its properties, its application fields have become more extensive; therefore, the resource utilization of leather scraps is no longer just about using waste leather scraps to produce low-value-added products such as regenerated leather, but has been given new content, that is, striving to pursue high-value-added transformation. Since collagen fibers are important functional substances that make up animal bodies and have biocompatibility and biodegradability that are incomparable to other synthetic polymer materials. Therefore, collagen fibers (i.e., animal leather fibers) as natural biomass resources are becoming increasingly prominent in terms of their importance and economic status in industries such as food, medicine, cosmetics, feed, and fertilizers.

[0017] Based on the above background, the inventors have conducted in-depth research on the reuse of leather scraps, applied for domestic and foreign patents, and put them into actual production. For example, Chinese patent application numbers 200410034435.4, 200410090255.8, 200410097268.8, 200410097268.8, 200510036778.9, 200710003092.9, 200710090219.5, 201010211811.8, 201020236921.5, 201621302339.8, etc. all involve collagen fibers. The above-mentioned collagen fibers studied by the inventors are obtained by gradually loosening the collagen fibers in leather scraps or leather in a woven state under the hydraulic action of a liquid defiberizer. However, in previous research and implementation, only the collagen fibers in leather scraps or leather were loosened to form animal leather fibers with a main body and gradually branching. In the research, it was found that nanoscale materials would exhibit properties unique to non-nanoscale materials of the same kind. Therefore, it is of great significance to study and implement independent, separated nanoscale animal leather fiber branches and their processing methods.

[0018] For this reason, some people have also started to study natural nanofibers. For example, in the patent literature with Chinese patent application number 200510086251.7 and publication date of February 8, 2006, a preparation method of natural nanofibers is disclosed, and the following steps are specifically disclosed: (1) Immerse natural biological materials in a container with a certain solvent.

[0019] (2)Turn on an ultrasonic device with a certain frequency and power. Insert the ultrasonic transmitting probe into the container filled with the natural biological material solution and perform ultrasonic dissociation for a certain period of time to prepare a kind of natural nanofibers. The natural biological materials include spider silk, domestic silk, wild silk, wool, fish scales, bamboo fibers, bone collagen fibers, and wood fibers. It is disclosed in the above-mentioned literature that natural nanofibers can be obtained from bone collagen fibers. However, those skilled in the art know that bone collagen fibers are distributed in bone tissues, and the protein constituting bone collagen fibers is type I collagen. Type I collagen constitutes bone collagen. Bone type I collagen has more than 3,000 amino acids in total, with a molecular weight of 95,000, and is chemically different from type I collagen in connective tissues. Bone type I collagen has fewer cross-linking sites. The cross-linking is a structure formed after the G-aldehyde lysine is reduced by sodium borohydride. The pre-N-terminal extension peptide of bone type I collagen is phosphorylated, while post-translational modification of procollagen is not found in connective tissues. Bone collagen is also different from cartilage collagen in terms of amino acid composition. It contains two special amino acids, namely serine and glycine. A large amount of serine exists in the form of phosphoserine salts, so the combination of phosphate and bone collagen is very important during the mineralization process. During the bone matrix mineralization process, hydroxyapatite combines with bone collagen to form normal bone mass. The type I collagens in bone cross-link with each other to form the bone matrix framework; the quality and quantity of bone collagen are also related to mineralization, maintaining a certain deposition ratio. The mineralization process also requires the participation of non-collagen proteins in the bone matrix, such as osteocalcin and matrix proteins. Type I collagen not only provides a structural site for osteocalcin but also combines with non-collagen proteins such as osteocalcin to form a network scaffold, providing basic conditions for bone mineralization.

[0020] During the practical research process, on the undecalcified ultra-thin bone sections, it can be seen that hydroxyapatite crystals are distributed along the long axis of collagen fibers. The compressive resistance and elasticity of bone collagen fibers are poor, and hydroxyapatite crystals are fragile, but when the two are combined together, they have great structural strength, thus enabling bone tissues to obtain strong mechanical properties.

[0021] The collagen fibers in leather are also composed of collagen, but they are different from the collagen in bone collagen fibers. Moreover, the collagen fibers in leather have better compressive properties and elasticity, indicating that there are obvious differences in composition and properties between the collagen fibers in leather and bone collagen fibers.

[0022] Therefore, it is of far-reaching significance to develop a method to isolate animal leather collagen fiber bundles with nano-scale branches from leather to improve the performance of the isolated animal leather fiber bundles. Summary of the Invention

[0023] The first object of the present invention is to provide an animal leather fiber bundle with nanoscale branches. The structure of the animal leather fiber bundle of the present invention has independent, separated and attached nanoscale branches on the main body of the animal leather fiber, presenting the characteristics of good antibacterial effect, good adsorption performance and improved mechanical properties.

[0024] The second object of the present invention is to provide a yarn made of an animal leather fiber bundle with nanoscale branches. The structure of the yarn of the present invention has independent, separated and connected nanoscale branches on the main body of the animal leather fiber, presenting the characteristics of good antibacterial effect, good adsorption performance and improved mechanical properties.

[0025] The third object of the present invention is to provide a core-spun yarn made of an animal leather fiber bundle with nanoscale branches. The structure of the core-spun yarn of the present invention has independent, separated and connected nanoscale branches on the main body of the animal leather fiber, presenting the characteristics of good antibacterial effect, good adsorption performance and improved mechanical properties.

[0026] The fourth object of the present invention is to provide a product made of an animal leather fiber bundle with nanoscale branches. The animal leather fiber bundle in the product has independent, separated and connected nanoscale branches on the main body of the animal leather fiber, presenting the characteristics of good antibacterial effect, good adsorption performance and improved mechanical properties.

[0027] To achieve the above first object, an animal leather fiber bundle with nanoscale branches includes a main body of animal leather fiber, and the main body of animal leather fiber is a spinnable main body of animal leather fiber; nanoscale branches are provided on the main body of animal leather fiber.

[0028] Furthermore, the nanoscale branches include nanoscale branches with a diameter of less than 200 nm.

[0029] The animal leather fiber bundle with nanoscale branches is a spinnable fiber bundle with nanoscale branches formed through various processes such as liquid fibrillation, opening, and carding of animal leather. Relative to the protofibrils, subfibrils, and fibrils during the formation of collagen fibers, these nanoscale branches exist independently and separately and adhere to the main body of the animal leather fiber. There are obvious differences in the quantity of their morphological structures per unit length compared to that of protofibrils, subfibrils, and fibrils. For the animal leather fiber bundle with nanoscale branches, the specific surface area of the nanoscale branches increases significantly, enabling the animal leather fiber bundle to not only exhibit its own properties but also generate new functions, namely, a great adsorption function. The generation of this adsorption function is due to the presence of independent, separate nanoscale branches that adhere to the main body of the animal leather fiber. Since the animal leather fiber bundle is formed by amino acid sequences into peptide chains and then by peptide chains into collagen molecules, this special composition in the animal leather fiber bundle causes the animal leather fiber bundle to exhibit a "blue shift" phenomenon in optical properties. Therefore, its ability to absorb ultraviolet light is stronger. Based on the improved ultraviolet adsorption ability of the animal leather fiber bundle with nanoscale branches and through detection and comparison, its antibacterial effect is very good, with a sterilization rate of over 95%, far exceeding the antibacterial properties of existing fiber materials.

[0030] Liquid fibrillation extracts the animal leather fiber bundle in leather or leather scraps under the mechanical action of the rotor of the liquid fibrillation machine and the hydrodynamic shear force caused by the rotation of the rotor. Specifically, during the rotation of the rotor of the liquid fibrillation machine, on the one hand, the blades on the rotor act on the leather or leather scraps, generating frictional forces and other forces between the leather or leather scraps and the rotor. On the other hand, due to the strong vortex generated by the rotor, a turbulent region with a very high velocity is formed around the rotor, resulting in different liquid flow velocities in each region. Thus, the leather or leather scraps rub against each other, and finally, the leather fiber bundle is extracted.

[0031] In addition, collagen molecules are composed of a right-handed composite helix of tropocollagen formed by the intertwining of three left-handed α-chains, which is the collagen helix. This collagen helix is the secondary structure of collagen. The high stability of the secondary structure of collagen mainly benefits from intermolecular hydrogen bonds and intermolecular and intramolecular covalent cross-links. So far, the first identified cross-linking structures mainly include Schiff base cross-links, β-hydroxyaldehyde cross-links, and hydroxyaldehyde histidine cross-links, etc. For animal leather fiber bundles with nanoscale branches, due to the increased number of surface atoms, insufficient atomic coordination, and high surface energy of the nanoscale branches, these surface atoms have high activity and are extremely unstable, and are very easy to combine with other atoms. Based on the intermolecular covalent cross-linking effect, the nanoscale branches are easily combined with animal leather fibers and other nanoscale branches. At the same time, the nanoscale branches are attached to the main body of animal leather fibers, and the main body of animal leather fibers provides greater mechanical strength for the animal leather fiber bundle. In addition, the main bodies of animal leather fibers, between nanoscale branches, and between the main body of animal leather fibers and nanoscale branches are easily intertwined with each other, thereby improving the mechanical properties such as the strength of the animal leather fiber bundle. To achieve the above second objective, a yarn of an animal leather fiber bundle with nanoscale branches includes an animal leather fiber bundle with nanoscale branches. The animal leather fiber bundle with nanoscale branches includes a main body of animal leather fibers, and the main body of animal leather fibers is a spinnable main body of animal leather fibers. The main body of animal leather fibers has branches and nanoscale branches, and the main body of animal leather fibers, branches, and nanoscale branches are intertwined with each other and are twisted together longitudinally.

[0032] Furthermore, the nanoscale branches include nanoscale branches with a diameter of less than 200 nm.

[0033] Furthermore, the yarn of the animal leather fiber bundle with nanoscale branches further includes other textile fibers in addition to the animal leather fiber bundle with nanoscale branches.

[0034] The animal leather fiber bundle yarn with nanoscale branches is formed by twisting the animal leather fiber bundle with nanoscale branches, allowing the main body, branches, and nanoscale branches of the animal leather fiber to interlace and arrange longitudinally and twist together. The animal leather fiber bundle with nanoscale branches is a spinnable fiber bundle formed through various processes such as liquid fibrillation, carding, and combing. Compared with the protofibrils, subfibrils, and fibrils in the formation process of collagen fibers, the nanoscale branches exist independently and separately and adhere to the main body of the animal leather fiber. There are obvious differences in their morphology and structure from the protofibrils, subfibrils, and fibrils. For the animal leather fiber bundle with nanoscale branches, the specific surface area of the nanoscale branches increases significantly, enabling the animal leather fiber to not only exhibit its own properties but also generate new functions, namely, a great adsorption function. The generation of this adsorption function is due to the independent and separate nanoscale branches adhering to the main body of the animal leather fiber. Since the animal leather fiber bundle is formed by amino acid sequences into peptide chains and then peptide chains into collagen molecules, this special component in the animal leather fiber bundle causes the animal leather fiber bundle to have a "blue shift" phenomenon in optical properties. Therefore, its ability to absorb ultraviolet light is stronger. Based on the improved ultraviolet adsorption ability of the animal leather fiber bundle with nanoscale branches and through detection and comparison, its antibacterial effect is very good, with a sterilization rate of over 95%, greatly exceeding the antibacterial performance of existing fiber materials themselves.

[0035] Liquid fibrillation extracts the animal leather fiber bundle in leather or leather scraps under the mechanical action of the rotor of the liquid fibrillation machine and the hydrodynamic shear force caused by the rotation of the rotor. Specifically, during the rotation of the rotor of the liquid fibrillation machine, on the one hand, the blades on the rotor act on the leather or leather scraps, generating frictional forces and other forces between the leather or leather scraps and the rotor. On the other hand, due to the strong vortex generated by the rotor, a turbulent region with a very high velocity is formed around the rotor, resulting in different liquid flow velocities in each region. Thus, the leather or leather scraps rub against each other, and finally, the animal leather fiber bundle is extracted.

[0036] In addition, collagen molecules are composed of a right-handed composite helix of tropocollagen formed by three left-handed α-chains winding around each other. This is the collagen helix, which is the secondary structure of collagen. The high stability of the secondary structure of collagen mainly benefits from interchain hydrogen bonds and intermolecular and intramolecular covalent crosslinks between chains. So far, the first identified crosslinking structures mainly include Schiff base crosslinking, β-hydroxyaldehyde crosslinking, and hydroxyaldehyde histidine crosslinking, etc. For animal leather fiber bundles with nanoscale branches, due to the increased number of surface atoms, insufficient atomic coordination, and high surface energy of the nanoscale branches, these surface atoms have high activity and are extremely unstable, and are very easy to combine with other atoms. Based on the covalent crosslinking between chains, when the animal leather fiber bundles with nanoscale branches are intertwined by the twisting process, the nanoscale branches are easy to combine with the main body of the animal leather fiber, its branches, and other nanoscale branches. At the same time, the nanoscale branches are attached to the main body of the animal leather fiber, and the main body of the animal leather fiber provides greater mechanical strength for the animal leather fiber bundle. In addition, it is easy for the main bodies of the animal leather fibers, the nanoscale branches, and between the main body of the animal leather fiber and the nanoscale branches to intertwine with each other, thereby improving the mechanical properties such as the strength of the yarn. To achieve the above-mentioned third object, a core-spun yarn of animal leather fiber bundles with nanoscale branches includes a core yarn, and a cortex formed by twisting animal leather fiber bundles with nanoscale branches is coated outside the core yarn. The animal leather fiber bundles with nanoscale branches include a main body of animal leather fiber, and the main body of animal leather fiber is a spinnable main body of animal leather fiber. Branches and nanoscale branches are provided on the main body of animal leather fiber, and the main body of animal leather fiber, the branches, and the nanoscale branches are interlaced with each other and twisted together longitudinally.

[0037] Furthermore, the nanoscale branches include nanoscale branches with a diameter of less than 200 nm.

[0038] Furthermore, the cortex also includes other textile fibers in addition to the animal leather fiber bundles with nanoscale branches.

[0039] Furthermore, the core yarn is an elastic core yarn.

[0040] The core-spun yarn of animal leather fiber bundles with nanoscale branches is formed by twisting and longitudinally arranging animal leather fiber bundles with nanoscale branches to form a cortex, enabling the main body of animal leather fiber, the branches, and the nanoscale branches to interlace and intertwine with each other, and the cortex is coated outside the core yarn.

[0041] When carding the animal leather fiber bundle with nanoscale branches of the present invention, the more sufficient the carding, the more the animal leather fiber bundle with nanoscale branches splits, and the more branches and nanoscale branches there are. The thinner the main body of the animal leather fiber and the branches are. Although the length of the animal leather fiber bundle with nanoscale branches after carding becomes shorter, due to the generation of more branches, through the twisting process of spinning, the animal leather fiber bundle with nanoscale branches and its branches form an intertwined and twisted network structure arranged longitudinally with the animal leather fiber bundle with adjacent nanoscale branches and its branches; the more branches and nanoscale branches there are, the more complex the network structure is, and the larger the specific surface area of the animal leather fiber bundle with nanoscale branches is, the greater the friction force and the greater the cohesion force between them will be, which will improve the tensile strength and wear resistance of the cortex itself. For the yarn of the same count, the more the number of the animal leather fiber bundle with nanoscale branches and its branches, the more entanglement and intersection points there are, the better the yarn evenness, the higher the quality and performance, and the natural and unique structural characteristics of the animal leather fiber bundle with nanoscale branches are fully utilized. And due to the setting of the core yarn, even if the animal leather fiber bundle with nanoscale branches is carded into a shorter animal leather fiber bundle with nanoscale branches, it will not affect the tensile strength of the core-spun yarn. Therefore, the present invention solves the problem that in the prior art, directly spinning the animal leather fiber bundle extracted from leather cannot reach the basic tensile strength, and solves the disadvantages that it is extremely difficult to process high-count yarn or it cannot be processed at all.

[0042] The animal leather fiber bundle with nanoscale branches is a spinnable fiber bundle formed through various processes such as liquid defibrillation, opening, and carding. Compared with the protofibril, subfibril, and fibril in the formation process of collagen fiber, the nanoscale branches exist independently and separately, and there are obvious differences in their morphology and structure from the protofibril, subfibril, and fibril. For the animal leather fiber bundle with nanoscale branches, the specific surface area of the nanoscale branches increases significantly, which enables the animal leather fiber to not only exert its own performance but also generate new functions, that is, a great adsorption function is generated. The generation of this adsorption function is due to the generation of independent and separate nanoscale branches, and the animal leather fiber bundle is formed by amino acid sequences to form peptide chains, and then peptide chains form collagen molecules. This special component in the animal leather fiber bundle makes the animal leather fiber bundle have a "blue shift" phenomenon in optical properties. Therefore, the ability to absorb ultraviolet light is stronger. Based on the improved ultraviolet adsorption ability of the animal leather fiber bundle with nanoscale branches, and through detection and comparison, its antibacterial effect is very good, and the sterilization rate can reach more than 95%, greatly exceeding the antibacterial performance of the existing fiber materials themselves.

[0043] Liquid fibrillation extracts animal leather fiber bundles from leather or leather scraps under the mechanical action of the rotor of a liquid fibrillation machine and the hydraulic shear action caused by the rotation of the rotor. Specifically, during the rotation of the rotor of the liquid fibrillation machine, on the one hand, the blades on the rotor act on the leather or leather scraps, generating frictional forces and other forces between the leather or leather scraps and the rotor. On the other hand, due to the strong vortex generated by the rotor, a high-velocity turbulent region is formed around the rotor, resulting in different flow velocities of the liquid in each region. Thus, the leather or leather scraps rub against each other, and finally the leather fiber bundles are extracted.

[0044] In addition, the collagen molecule is a right-handed composite helix of tropocollagen formed by the intertwining of three left-handed α-chains, which is the collagen helix. This collagen helix is the secondary structure of collagen. The high stability of the secondary structure of collagen mainly benefits from intermolecular hydrogen bonds and intermolecular and intramolecular covalent cross-links. So far, the first identified cross-linking structures mainly include Schiff base cross-links, β-hydroxyaldehyde cross-links, and hydroxyaldehyde histidine cross-links, etc. For animal leather fiber bundles with nanoscale branches, due to the increase in the number of surface atoms, insufficient atomic coordination, and high surface energy of the nanoscale branches, these surface atoms have high activity and are extremely unstable, and are very easy to combine with other atoms. Based on the intermolecular covalent cross-linking effect, when the twisting process is used to interweave animal leather fiber bundles with nanoscale branches to form a cortex, the nanoscale branches are easy to combine with the main body of the animal leather fiber, its branches, and other nanoscale branches. At the same time, the nanoscale branches are attached to the main body of the animal leather fiber, and the main body of the animal leather fiber provides greater mechanical strength for the animal leather fiber bundle. In addition, it is easy for the main bodies of the animal leather fibers, the nanoscale branches, and between the main body of the animal leather fiber and the nanoscale branches to intertwine with each other, thereby improving the mechanical properties such as the strength of the yarn. The first technical solution to achieve the above fourth object is: A product with animal leather fiber bundles having nanoscale branches, including the animal leather fiber bundles having nanoscale branches described above.

[0045] Furthermore, it further includes other textile fibers except for the animal leather fiber bundles having nanoscale branches.

[0046] The second technical solution to achieve the above fourth object is: A product with animal leather fiber bundles having nanoscale branches, including the yarn of the animal leather fiber bundles having nanoscale branches described above.

[0047] The third technical solution to achieve the above fourth object is: A product with animal leather fiber bundles having nanoscale branches, including the core-spun yarn of the animal leather fiber bundles having nanoscale branches described above. Description of the Drawings

[0048] Figure 1It is an animal leather fiber bundle with nanoscale branches.

[0049] Figure 2 It is an electron micrograph of the animal leather fiber bundle before carding.

[0050] Figure 3 It is an electron micrograph of the animal leather fiber bundle with nanoscale branches after carding.

[0051] Figure 4 It is another electron micrograph of the animal leather fiber bundle with nanoscale branches.

[0052] Figure 5 It is the third electron micrograph of the animal leather fiber bundle with nanoscale branches.

[0053] Figure 6 It is a schematic diagram of the yarn of the animal leather fiber bundle with nanoscale branches.

[0054] Figure 7 It is a schematic diagram of the core-spun yarn of the animal leather fiber bundle with nanoscale branches.

[0055] Figure 8 It is an electron micrograph of the core-spun yarn of the animal leather fiber bundle with nanoscale branches, showing the animal leather fiber bundle with nanoscale branches peeled off from the core yarn. Detailed implementation mode

[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes.

[0057] Example 1.

[0058] As Figures 1 to 5 shown, an animal leather fiber bundle with nanoscale branches includes an animal leather fiber main body 100, and the animal leather fiber main body is a spinnable animal leather fiber main body; there are branches 101 and nanoscale branches 102 on the animal leather fiber main body. The nanoscale branches include nanoscale branches with a diameter of less than 200 nm.

[0059] The animal leather fiber bundle with nanoscale branches is a spinnable fiber bundle formed through various processes such as liquid fibrillation, opening, and carding. Compared with the protofibrils, subfibrils, and fibrils during the formation of collagen fibers, these nanoscale branches exist independently and separately and adhere to the main body of the animal leather fiber. There are obvious differences in their morphology and structure from the protofibrils, subfibrils, and fibrils. For the animal leather fiber bundle with nanoscale branches, the specific surface area of the nanoscale branches increases significantly, enabling the animal leather fiber bundle to not only exhibit its own properties but also generate new functions, namely, a great adsorption function. The generation of this adsorption function is due to the independent and separate nanoscale branches adhering to the main body of the animal leather fiber. Since the animal leather fiber bundle is formed by amino acid sequences into peptide chains and then the peptide chains form collagen molecules, this special composition in the animal leather fiber bundle results in a "blue shift" phenomenon in its optical properties. Therefore, its ability to absorb ultraviolet light is stronger. Based on the improved ultraviolet adsorption ability of the animal leather fiber bundle with nanoscale branches and through detection and comparison, its antibacterial effect is very good, with a sterilization rate reaching over 95%, greatly exceeding the antibacterial properties of existing fiber materials.

[0060] Liquid fibrillation extracts the animal leather fiber bundle in leather or leather scraps under the mechanical action of the rotor of the liquid fibrillation machine and the hydrodynamic shear force caused by the rotation of the rotor. Specifically, during the rotation of the rotor of the liquid fibrillation machine, on the one hand, the blades on the rotor act on the leather or leather scraps, generating frictional forces and other forces between the leather or leather scraps and the rotor. On the other hand, due to the strong vortex generated by the rotor, a high-velocity turbulent region is formed around the rotor, resulting in different flow velocities of the liquid in each region. Thus, the leather or leather scraps rub against each other, and finally, the leather fiber bundle is extracted.

[0061] From Figure 2 it can be seen that before carding, the animal leather fibers are basically in a relatively thick fiber bundle structure after being liquid fibrillated and opened, as shown in Figures 3 to 5 . After carding, nanoscale branches of animal leather fibers appear. As can be seen from the electron micrograph, Figure 3 has nanoscale branches of 195.3 nm, Figure 4 has nanoscale branches of 139.6 nm, and Figure 5 has nanoscale branches of 117.7 nm.

[0062] In addition, a collagen molecule is a right-handed composite helix of tropocollagen formed by three left-handed α-chains winding around each other, which is the collagen helix. This collagen helix is the secondary structure of collagen. The high stability of the secondary structure of collagen mainly benefits from intermolecular hydrogen bonds and intermolecular and intramolecular covalent cross-links. So far, the first confirmed cross-linking structures mainly include Schiff base cross-linking, β-hydroxyaldehyde cross-linking, and hydroxyaldehyde histidine cross-linking, etc. For animal leather fiber bundles with nanoscale branches, due to the increase in the number of surface atoms, insufficient atomic coordination, and high surface energy of the nanoscale branches, these surface atoms have high activity and are extremely unstable, and are very easy to combine with other atoms. Based on the intermolecular covalent cross-linking effect, the nanoscale branches are easily combined with animal leather fibers and other nanoscale branches. At the same time, the nanoscale branches are attached to the main body of the animal leather fiber, and the main body of the animal leather fiber provides greater mechanical strength for the animal leather fiber bundle. In addition, the main bodies of the animal leather fibers, the nanoscale branches, and the main body of the animal leather fiber and the nanoscale branches are easily intertwined with each other, thereby improving the mechanical properties such as the strength of the animal leather fiber bundle. Example 2.

[0063] As Figure 6 shown, the animal leather fiber bundle yarn with nanoscale branches includes the animal leather fiber bundle 3 with nanoscale branches. As Figure 1 shown, the animal leather fiber bundle 3 with nanoscale branches includes the main body 100 of the animal leather fiber. The main body of the animal leather fiber is a spinnable main body of the animal leather fiber. On the main body 100 of the animal leather fiber, there are branches 101 and nanoscale branches 102. The main body 100 of the animal leather fiber, the branches 101, and the nanoscale branches 102 are intertwined with each other and are twisted together longitudinally. The nanoscale branches include nanoscale branches with a diameter of less than 200 nm. Of course, other textile fibers except the animal leather fiber bundle with nanoscale branches can also be added to the animal leather fiber bundle yarn with nanoscale branches. The animal leather fiber bundle yarn with nanoscale branches is formed by twisting the animal leather fiber bundle with nanoscale branches, allowing the main body, branches, and nanoscale branches of the animal leather fiber to interlace and arrange longitudinally. The animal leather fiber bundle with nanoscale branches is a spinnable fiber bundle formed through various processes such as liquid fibrillation, opening, and carding. Compared with the protofibrils, subfibrils, and fibrils during the formation of collagen fibers, the nanoscale branches exist independently and separately and adhere to the main body of the animal leather fiber. There are obvious differences in their morphology and structure from the protofibrils, subfibrils, and fibrils. For the animal leather fiber bundle with nanoscale branches, the specific surface area of the nanoscale branches increases significantly, enabling the animal leather fiber to not only exhibit its own properties but also generate new functions, namely a great adsorption function. The generation of this adsorption function is due to the independent and separate nanoscale branches adhering to the main body of the animal leather fiber. Since the animal leather fiber bundle is formed by amino acid sequences into peptide chains and then peptide chains into collagen molecules, this special composition in the animal leather fiber bundle causes the animal leather fiber bundle to have a "blue shift" phenomenon in optical properties. Therefore, its ability to absorb ultraviolet light is stronger. Based on the improved ultraviolet adsorption ability of the animal leather fiber bundle with nanoscale branches and through detection and comparison, its antibacterial effect is very good, with a sterilization rate of over 95%, greatly exceeding the antibacterial properties of existing fiber materials themselves.

[0064] Liquid fibrillation extracts the animal leather fiber bundle from leather or leather scraps under the mechanical action of the rotor of the liquid fibrillation machine and the hydrodynamic shear force caused by the rotation of the rotor. Specifically, during the rotation of the rotor of the liquid fibrillation machine, on the one hand, the blades on the rotor act on the leather or leather scraps, generating frictional forces and other acting forces between the leather or leather scraps and the rotor. On the other hand, due to the strong vortex generated by the rotor, a high-velocity turbulent region is formed around the rotor, resulting in different flow velocities of the liquid in each region. Thus, the leather or leather scraps rub against each other, and finally, the animal leather fiber bundle is extracted.

[0065] In addition, a collagen molecule is a right-handed composite helix of tropocollagen formed by the intertwining of three left-handed α-chains, which is the collagen helix. This collagen helix is the secondary structure of collagen. The high stability of the secondary structure of collagen mainly benefits from intermolecular hydrogen bonds and intermolecular and intramolecular covalent cross-links. So far, the first identified cross-linking structures mainly include Schiff base cross-linking, β-hydroxyaldehyde cross-linking, and hydroxyaldehyde histidine cross-linking, etc. For animal leather fiber bundles with nanoscale branches, due to the increased number of surface atoms, insufficient atomic coordination, and high surface energy of the nanoscale branches, these surface atoms have high activity and are extremely unstable, and are very easy to combine with other atoms. Based on the intermolecular covalent cross-linking effect, when the animal leather fiber bundles with nanoscale branches are intertwined by using a twisting process, the nanoscale branches are easy to combine with the main body of the animal leather fiber, its branches, and other nanoscale branches. At the same time, the nanoscale branches are attached to the main body of the animal leather fiber, and the main body of the animal leather fiber provides greater mechanical strength for the animal leather fiber bundle. In addition, the main bodies of the animal leather fibers, the nanoscale branches, and the main body of the animal leather fiber and the nanoscale branches are easy to intertwine with each other, thereby improving the mechanical properties such as the strength of the yarn. Example 3.

[0066] As Figure 7 and Figure 8 shown, the core-spun yarn of the animal leather fiber bundle with nanoscale branches includes a core yarn 21, and a cortex formed by twisting the animal leather fiber bundle 3 with nanoscale branches is coated on the core yarn 21. As Figure 1 shown, the animal leather fiber bundle with nanoscale branches includes a main body 100 of the animal leather fiber, and the main body 100 of the animal leather fiber is a spinnable main body of the animal leather fiber. Branches 101 and nanoscale branches 102 are provided on the main body of the animal leather fiber. The main body 100 of the animal leather fiber, the branches 101, and the nanoscale branches 102 are intertwined with each other and are twisted together along the longitudinal direction. In this embodiment, the core yarn can be an elastic core yarn, and the core-spun yarn made in this way has elasticity. The nanoscale branches include nanoscale branches with a diameter of less than 200 nm. Of course, other textile fibers except the animal leather fiber bundle with nanoscale branches can also be added to the cortex.

[0067] The core-spun yarn of the animal leather fiber bundle with nanoscale branches is formed by twisting the animal leather fiber bundle with nanoscale branches to form a cortex, so that the main body of the animal leather fiber, the branches, and the nanoscale branches are intertwined with each other and are arranged along the longitudinal direction, and the cortex is coated outside the core yarn.

[0068] When carding the animal leather fiber bundle with nanoscale branches of the present invention, the more sufficient the carding, the more the animal leather fiber bundle with nanoscale branches splits, and the more branches and nanoscale branches there are. The thinner the main body of the animal leather fiber and the branches are. Although the length of the animal leather fiber bundle with nanoscale branches after carding becomes shorter, due to the generation of more branches, through the twisting process of spinning, the animal leather fiber bundle with nanoscale branches and its branches form an interlaced, entangled and twisted network structure with the adjacent animal leather fiber bundle with nanoscale branches and its branches; the more branches and nanoscale branches there are, the more complex the network structure is, and the larger the specific surface area of the animal leather fiber bundle with nanoscale branches is, the greater the friction force and the greater the cohesion force between them will be, which will improve the tensile strength and wear resistance of the cortex itself. For the yarn of the same count, the more the number of the animal leather fiber bundle with nanoscale branches and its branches, the more entanglement and intersection points there are, the better the yarn evenness, the higher the quality and performance, and the natural and unique structural characteristics of the animal leather fiber bundle with nanoscale branches are fully utilized. And due to the setting of the core yarn, even if the animal leather fiber bundle with nanoscale branches is carded into a shorter animal leather fiber bundle with nanoscale branches, it will not affect the tensile strength of the core-spun yarn. Therefore, the present invention solves the problem that the animal leather fiber bundle directly extracted from leather in the prior art cannot reach the basic tensile strength during spinning, and solves the disadvantages that it is extremely difficult to process high-count yarn or it cannot be processed at all.

[0069] The animal leather fiber bundle with nanoscale branches is a spinnable fiber bundle formed through various processes such as liquid defibrillation, opening and carding. Compared with the protofibrils, subfibrils, and fibrils in the formation process of collagen fibers, the nanoscale branches exist independently and separately and adhere to the main body of the animal leather fiber. There are obvious differences in the morphology and structure between them and the protofibrils, subfibrils, and fibrils. For the animal leather fiber bundle with nanoscale branches, the specific surface area of the nanoscale branches increases significantly, which not only enables the animal leather fiber to exert its own performance but also generates a new function, that is, a great adsorption function. The generation of this adsorption function is due to the generation of independent and separate nanoscale branches adhering to the main body of the animal leather fiber. And the animal leather fiber bundle is formed by amino acid sequences into peptide chains, and then the peptide chains form collagen molecules. This special component in the animal leather fiber bundle makes the animal leather fiber bundle have a "blue shift" phenomenon in optical properties. Therefore, its ability to absorb ultraviolet light is stronger. Based on the improved ultraviolet adsorption ability of the animal leather fiber bundle with nanoscale branches, through detection and comparison, its antibacterial effect is very good, and the sterilization rate can reach more than 95%, far exceeding the antibacterial performance of the existing fiber materials itself.

[0070] Liquid defibrillation extracts animal leather fiber bundles from leather or leather scraps under the mechanical action of the rotor of a liquid defibrillator and the hydrodynamic shear action caused by the rotation of the rotor. Specifically, during the rotation of the rotor of the liquid defibrillator, on the one hand, the blades on the rotor act on the leather or leather scraps, generating frictional forces and other forces between the leather or leather scraps and the rotor. On the other hand, due to the strong vortex generated by the rotor, a turbulent region with a very high velocity is formed around the rotor, resulting in different flow velocities of the liquid in each region. Thus, the leather or leather scraps rub against each other, and finally the leather fiber bundles are extracted.

[0071] In addition, the collagen molecule is a right-handed composite helix of procollagen formed by three left-handed α-chains winding around each other, which is the collagen helix. This collagen helix is the secondary structure of collagen. The high stability of the secondary structure of collagen mainly benefits from intermolecular hydrogen bonds and intermolecular and intramolecular covalent cross-links. So far, the first identified cross-linking structures mainly include Schiff base cross-links, β-hydroxyaldehyde cross-links, and hydroxyaldehyde histidine cross-links, etc. For animal leather fiber bundles with nanoscale branches, due to the increase in the number of surface atoms, insufficient atomic coordination, and high surface energy of the nanoscale branches, these surface atoms have high activity and are extremely unstable, and are very easy to combine with other atoms. Based on the intermolecular covalent cross-linking effect, when the animal leather fiber bundles with nanoscale branches are intertwined to form a cortex by using a twisting process, the nanoscale branches are easy to combine with the main body of the animal leather fiber, its branches, and other nanoscale branches. At the same time, the nanoscale branches are attached to the main body of the animal leather fiber, and the main body of the animal leather fiber provides greater mechanical strength for the animal leather fiber bundle. In addition, it is easy for the main bodies of the animal leather fibers, between the nanoscale branches, and between the main body of the animal leather fiber and the nanoscale branches to intertwine with each other, thereby improving the mechanical properties such as the strength of the yarn. Example 4.

[0072] A product with animal leather fiber bundles having nanoscale branches, which is made from the animal leather fiber bundles having nanoscale branches described in Example 1.

[0073] Example 5.

[0074] A product with animal leather fiber bundles having nanoscale branches, which is made from the yarn of animal leather fiber bundles having nanoscale branches described in Example 2.

[0075] Example 6.

[0076] A product with animal leather fiber bundles having nanoscale branches, which is made from the core-spun yarn of animal leather fiber bundles having nanoscale branches described in Example 3.

[0077] The above-mentioned products can be wearable items such as clothes, hats, shoes, socks, gloves, etc., or they can be bedding, decorative materials, and so on.

[0078] The following is the antibacterial test report made by Guangdong Guangfang Testing and Metrology Technology Co., Ltd. commissioned by the applicant on April 8, 2019. The test report was issued on April 18, 2019, with the number (NO.): 19F02538, anti-counterfeiting code: VBTU-IN1L-S8, and the anti-counterfeiting query website for the report: report.gztzs.com. The content of the test report is as follows:

[0079] As shown in the test report, the antibacterial effect of animal leather fiber bundles, yarns, etc. with nanoscale branches is very high.

Claims

1. An animal leather fiber bundle with nanoscale branches, comprising an animal leather fiber main body; characterized in that: There are nanoscale branches on the animal leather fiber main body; the nanoscale branches include nanoscale branches with a diameter of less than 200 nm; the manufacturing process of the animal leather fiber bundle with nanoscale branches includes liquid defibrillation, and liquid defibrillation is to extract the animal leather fiber bundle in leather or leather scraps under the mechanical action of the rotor of the liquid defibrillator and the hydraulic shear action caused by the rotation of the rotor.

2. The animal leather fiber bundle with nanoscale branches according to claim 1, characterized in that: During the rotation of the rotor of the liquid defibrillator, a turbulent region is formed around the rotor, resulting in different flow velocities of the liquid in each region, causing the leather or leather scraps to rub against each other, and extracting the leather fiber bundle.

3. The animal leather fiber bundle with nanoscale branches according to claim 1 or 2, characterized in that: During the rotation of the rotor of the liquid defibrillator, the blades on the rotor act on the leather or leather scraps, generating frictional force between the leather or leather scraps and the rotor, and extracting the leather fiber bundle.

4. An animal leather fiber bundle yarn with nanoscale branches, characterized in that: It includes an animal leather fiber bundle with nanoscale branches. The animal leather fiber bundle with nanoscale branches includes an animal leather fiber main body, and there are nanoscale branches on the animal leather fiber main body. The animal leather fiber main body and the nanoscale branches are interlaced and twisted together longitudinally; the nanoscale branches include nanoscale branches with a diameter of less than 200 nm; The manufacturing process of the animal leather fiber bundle with nanoscale branches includes liquid defibrillation, and liquid defibrillation is to extract the animal leather fiber bundle in leather or leather scraps under the mechanical action and hydraulic shear action of the rotor of the liquid defibrillator.

5. The animal leather fiber bundle yarn with nanoscale branches according to claim 4, characterized in that: During the rotation of the rotor of the liquid defibrillator, a turbulent region is formed around the rotor, resulting in different flow velocities of the liquid in each region, causing the leather or leather scraps to rub against each other, and extracting the leather fiber bundle.

6. The animal leather fiber bundle yarn with nanoscale branches according to claim 5, characterized in that: During the rotation of the rotor of the liquid defibrillator, the blades on the rotor act on the leather or leather scraps, generating frictional force between the leather or leather scraps and the rotor, and extracting the leather fiber bundle.

7. The animal leather fiber bundle yarn with nanoscale branches according to claim 4, characterized in that: The animal leather fiber bundle yarn with nanoscale branches also includes other textile fibers mixed in addition to the animal leather fiber bundle with nanoscale branches.

8. A core-spun yarn of animal leather fiber bundle with nanoscale branches, including a core yarn, characterized in that: There is a cortex formed by twisting the animal leather fiber bundle with nanoscale branches wrapped around the core yarn. The animal leather fiber bundle with nanoscale branches includes an animal leather fiber main body, and there are nanoscale branches on the animal leather fiber main body. The animal leather fiber main body and the nanoscale branches are interlaced and twisted together longitudinally; the nanoscale branches include nanoscale branches with a diameter of less than 200 nm; The manufacturing process of the animal leather fiber bundle with nanoscale branches includes liquid defibrillation, and liquid defibrillation is to extract the animal leather fiber bundle in leather or leather scraps under the mechanical action of the rotor of the liquid defibrillator and the hydraulic shear action caused by the rotation of the rotor.

9. The core-spun yarn of animal leather fiber bundle with nanoscale branches according to claim 8, characterized in that: During the rotation of the rotor of the liquid defibrillator, a turbulent region is formed around the rotor, resulting in different flow velocities of the liquid in each region, causing the leather or leather scraps to rub against each other, and extracting the leather fiber bundle.

10. The core-spun yarn of animal leather fiber bundle with nanoscale branches according to claim 9, characterized in that: During the rotation of the rotor of the liquid defibrillator, the blades on the rotor act on the leather or leather scraps, generating frictional force between the leather or leather scraps and the rotor, and extracting the leather fiber bundle.

11. The core-spun yarn of animal leather fiber bundle with nanoscale branches according to claim 8, characterized in that: The cortex also includes other textile fibers mixed with animal leather fiber bundles having nanoscale branches.

12. The core-spun yarn of animal leather fiber bundle with nanoscale branches according to claim 8, characterized in that: The core yarn described is an elastic core yarn.

13. An article with a nanofibrillar animal leather fiber bundle, characterized in that: It includes animal leather fiber bundles having nanoscale branches; the animal leather fiber bundles having nanoscale branches include an animal leather fiber main body; there are nanoscale branches on the animal leather fiber main body; the nanoscale branches include nanoscale branches with a diameter of 200 nm or less. The manufacturing process of the animal leather fiber bundles having nanoscale branches includes liquid defibrillation, and liquid defibrillation is to extract the animal leather fiber bundles in leather or leather scraps under the mechanical action and hydraulic shear action of the rotor of a liquid defibrillator.

14. The article with a nanofibrillar animal leather fiber bundle according to claim 13, characterized in that: During the rotation of the rotor of the liquid defibrillator, a turbulent region is formed around the rotor, resulting in different flow velocities of the liquid in each region, causing the leather or leather scraps to rub against each other, and extracting the leather fiber bundles.

15. The article with a nanofibrillar animal leather fiber bundle according to claim 13 or 14, characterized in that: [[ID=!During the rotation of the rotor of the liquid defibrillator, the blades on the rotor act on the leather or leather scraps, generating frictional force between the leather or leather scraps and the rotor, and extracting the leather fiber bundles.

16. The article with nanofibrillar animal leather fiber bundles according to claim 13, characterized in that: It also includes other textile fibers besides the animal leather fiber bundles having nanoscale branches.

17. An article with nano-scale branched animal leather fiber bundles, characterized in that: It includes the yarn of the animal leather fiber bundles having nanoscale branches according to any one of claims 4 to 7.

18. An article with nanofibrillar animal leather fiber bundles, characterized in that: It includes the core-spun yarn of the animal leather fiber bundles having nanoscale branches according to any one of claims 8 to 12.

19. An animal leather fiber bundle with nanoscale branches, comprising an animal leather fiber main body; characterized in that: There are nanoscale branches on the animal leather fiber main body; the nanoscale branches include nanoscale branches with a diameter of 200 nm or less. The animal leather fiber bundles having nanoscale branches have a blue shift phenomenon in optical properties and have the ability to absorb ultraviolet light.

20. The animal leather fiber bundle with nanoscale branches according to claim 19, characterized in that: The sterilization rate of the animal leather fiber bundles having nanoscale branches is above 95%.

21. The animal leather fiber bundle with nanoscale branches according to claim 19, characterized in that: The antibacterial effect of the animal leather fiber bundles having nanoscale branches complies with the FZ / T73023-2006 standard.

22. An animal leather fiber bundle yarn with nanoscale branches, characterized in that: It is characterized in that: it includes animal leather fiber bundles having nanoscale branches, the animal leather fiber bundles having nanoscale branches include an animal leather fiber main body, there are nanoscale branches on the animal leather fiber main body, the animal leather fiber main body and the nanoscale branches are interlaced and twisted together longitudinally; the nanoscale branches include nanoscale branches with a diameter of 200 nm or less. The animal leather fiber bundles having nanoscale branches have a blue shift phenomenon in optical properties and have the ability to absorb ultraviolet light.

23. The animal leather fiber bundle yarn with nanoscale branches according to claim 22, characterized in that: The sterilization rate of the animal leather fiber bundles having nanoscale branches is above 95%.

24. The animal leather fiber bundle yarn with nanoscale branches according to claim 22, characterized in that: The antibacterial effect of the animal leather fiber bundles having nanoscale branches complies with the FZ / T73023-2006 standard.

25. A core-spun yarn of animal leather fiber bundle with nanoscale branches, comprising a core yarn, characterized in that: A cortex formed by twisting animal leather fiber bundles having nanoscale branches is coated on the core yarn. The animal leather fiber bundles having nanoscale branches include an animal leather fiber main body, there are nanoscale branches on the animal leather fiber main body, the animal leather fiber main body and the nanoscale branches are interlaced and twisted together longitudinally; the nanoscale branches include nanoscale branches with a diameter of 200 nm or less. The animal leather fiber bundles having nanoscale branches have a blue shift phenomenon in optical properties and have the ability to absorb ultraviolet light.

26. The core-spun yarn of animal leather fiber bundles with nanoscale branches according to claim 25, characterized in that: The sterilization rate of the animal leather fiber bundle with nanoscale branches is above 95%.

27. The core-spun yarn of animal leather fiber bundle with nanoscale branches according to claim 25, characterized in that: The antibacterial effect of the animal leather fiber bundle with nanoscale branches conforms to the FZ / T73023-2006 standard.

28. An article with nanofibrillar animal leather fiber bundles, characterized in that: It includes the animal leather fiber bundle with nanoscale branches described in claim 19, 20 or 21.

29. The article with a nanofibrillar animal leather fiber bundle according to claim 28, wherein: It also includes other textile fibers except the animal leather fiber bundle with nanoscale branches.

30. An article with nanofibrillar animal leather fiber bundles, characterized in that: It includes the yarn of the animal leather fiber bundle with nanoscale branches described in claim 22, 23 or 24.

31. An article with nanofibrillar animal leather fiber bundles, characterized in that: It includes the core-spun yarn of the animal leather fiber bundle with nanoscale branches described in claim 25, 26 or 27.

32. An animal leather fiber bundle with nanoscale branches, comprising an animal leather fiber main body; characterized in that: It has nanoscale branches on the animal leather fiber main body; the nanoscale branches include nanoscale branches with a diameter of 200 nm or less, and the atoms of the nanoscale branches are combined with the atoms of other nanoscale branches.

33. The animal leather fiber bundle with nanoscale branches according to claim 32, characterized in that: The atoms of the nanoscale branches are combined with the atoms of other nanoscale branches to form a covalent crosslinking effect.

34. An animal leather fiber bundle yarn with nanoscale branches, characterized in that: It includes the animal leather fiber bundle with nanoscale branches described in claim 32 or 33.

35. An animal leather fiber bundle product with nanoscale branches, characterized in that: It includes the animal leather fiber bundle with nanoscale branches described in claim 32 or 33.

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