Regenerated cowhide fiber environmentally friendly leather and its production line and production process

Abstract

The present invention relates to the field of fabric technology, and specifically to a regenerated cowhide fiber environmentally friendly leather and a production line and production process thereof. The cowhide fiber surface layer and the cowhide fiber bottom layer are mainly composed of regenerated cowhide fibers. After water entanglement, the cowhide fibers and the base cloth have a strong degree of cross-linking, which improves the durability of the regenerated cowhide fiber environmentally friendly leather. The produced regenerated cowhide fiber environmentally friendly leather feels close to genuine leather and has good tear strength and tensile properties, which solves the problem of low utilization rate of traditional genuine leather due to natural limitations such as irregularity and width, and surface trauma. The regenerated leather can be provided in length according to product requirements, and can be customized in various colors and textures according to customer needs.

Description

Technical Field

[0001] The present invention relates to the technical field of fabrics, and in particular to regenerated cowhide fiber environment-friendly leather and a production line and a production process thereof. Background Art

[0002] In the leather manufacturing industry, traditional genuine leather has long been widely used in numerous industries due to its excellent texture and performance. However, since genuine leather is primarily sourced from animal hides, it faces numerous limitations. For one thing, genuine leather exhibits irregularities and limited width, and is prone to natural defects such as surface trauma, resulting in low utilization rates. Furthermore, the color and texture of genuine leather are relatively fixed, making it difficult to customize to meet the diverse needs of customers, which, to a certain extent, limits its scope of application. To address these issues with traditional genuine leather, recycled leather technology has emerged. Among the most common recycled leather technologies currently available, some involve simply beating and defibrillating cowhide waste before compounding it with other fibers or materials. At the same time, in terms of the selection and use of base fabrics, ordinary fabric base fabrics are more common. When these base fabrics are compounded with cowhide fibers, they mainly rely on simple physical bonding or a small amount of chemical cross-linking. The base fabrics usually adopt a single yarn structure, and the cross-linking and connection methods between the yarns are relatively simple. It is difficult to form a high-strength bonding effect when compounded with cowhide fibers. The water-jet cross-linking density is low, which affects the bonding strength and overall performance between the layers of leather. In view of this, this case arises. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems through regenerated cowhide fiber environmentally friendly leather and its production line and production process.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: the regenerated cowhide fiber environmentally friendly leather includes a cowhide fiber surface layer, a double suede base fabric layer and a cowhide fiber bottom layer from top to bottom, and the upper and lower surfaces of the double suede base fabric layer are distributed with fluff, and the cowhide fibers of the cowhide fiber surface layer and the cowhide fiber bottom layer are cross-linked with the yarn fibers and fluff fibers of the double suede base fabric layer.

[0005] Preferably, the fabric structure of the double-suede base fabric layer is a binding warp-binding double-layer structure, in which the surface warp and the surface weft are interwoven into the base fabric surface layer, and the inner warp and the inner weft are interwoven into the base fabric inner layer, and the binding warp is interwoven with the surface weft and the inner weft at the same time, so that the base fabric surface layer and the base fabric inner layer are connected to each other.

[0006] Preferably, in the double-layer structure of the binding warp, the surface structure is a two-up and two-down right twill structure, the lining structure is a one-up and three-down right twill structure, the warp yarn arrangement order is one surface warp, one lining warp, and one binding warp, and the weft yarn arrangement order is one surface weft, one lining weft.

[0007] Preferably, the surface warp and the lining warp are island yarns, the island yarns are composited by network processing of island yarns and high shrinkage yarns, the island yarns are composited by spinning sea components coated with island components, the sea component is low-viscosity PET, the island component is PBT / IPA copolymer, the high shrinkage yarn is modified PET, the binding warp is high-strength PA66 filament, and the surface weft and the lining weft are modified PA6 staple yarns.

[0008] Preferably, the raw materials of the island-in-the-sea yarn include the following components in parts by weight: 65-70 parts of low-viscosity PET, 35-40 parts of PBT / IPA copolymer, 30-35 parts of modified PET, and 0.6-0.8 parts of network oil.

[0009] Preferably, the slurry of the cowhide fiber surface layer and the cowhide fiber bottom layer comprises the following components in parts by weight: 90-100 parts of regenerated cowhide fiber, 5-8 parts of plant fiber, 8-10 parts of temperature-sensitive hydrogel fiber, 3-5 parts of nanocellulose whiskers, and 5-8 parts of waterborne polyurethane.

[0010] The above-mentioned production line of regenerated cowhide fiber environmentally friendly leather includes an inclined wire papermaking machine, a base fabric unwinding machine, a base fabric belt conveyor, a composite belt conveyor, a water spunlace device and a drying device. There are two inclined wire papermaking machines, the base fabric unwinding machine is located at the front end of the base fabric belt conveyor, the water spunlace device and the drying device are arranged in sequence at the rear end of the composite belt conveyor, and a carding machine is provided at the end of the base fabric belt conveyor. The carding machine is provided with relatively upper comb tooth rollers and lower comb tooth rollers, followed by relatively upper air knives and lower suction rollers, and finally relatively upper ion wind rods and lower ion wind rods.

[0011] The production process of the above-mentioned regenerated cowhide fiber environmentally friendly leather includes the following steps:

[0012] Step a, preparing a double-suede base fabric;

[0013] Step b, the pulp is made into kraft fiber material through an inclined wire papermaking machine;

[0014] Step c, unwinding the prefabricated double-suede base fabric through a base fabric unwinding machine;

[0015] Step d: The double suede base fabric is conveyed by a base fabric belt conveyor and sandwiched between the kraft fiber materials produced by two inclined wire papermaking machines, and finally stacked on a composite belt conveyor to form a sandwich structure fabric;

[0016] Step e: the fabric enters the spunlace device, and the cowhide fiber surface layer, the double suede base fabric layer and the cowhide fiber bottom layer are spunlace-laminated by the spunlace machine;

[0017] Step f: The composite substrate after spunlace is sequentially subjected to rolling drying, drum drying, removal of harmful substances, and rotary screen drying, and finally rolled up.

[0018] Preferably, the preparation process of the double suede base fabric is as follows:

[0019] Step a, preparing island-in-the-sea yarn;

[0020] Step b, weaving a base fabric with a double-layer structure;

[0021] Step c, alkali treatment: alkali treatment was performed using 10% NaOH solution at 90°C for 30 min;

[0022] Step d, double-sided sanding: double-sided sanding is performed using a ceramic sanding disc at a rotation speed of 1500 rpm and a pressure of 0.15 MPa.

[0023] Preferably, the preparation process of the island yarn is as follows: after the sea component slices and the island component slices are melted, the island yarns with a 16-island structure are formed through an island spinneret; the island yarns and high shrinkage yarns are networked in proportion to synthesize the island yarns, and are treated with a polyether network oil agent.

[0024] From the above description, it can be seen that the regenerated cowhide fiber environmentally friendly leather and its production line and production process provided by the present invention have the following beneficial effects: cowhide waste is obtained by beating and defibrillating regenerated cowhide fiber, and the regenerated cowhide fiber is mainly in the cowhide fiber surface layer and the cowhide fiber bottom layer. Therefore, the regenerated cowhide fiber environmentally friendly leather produced has a feel close to that of genuine leather and has good tear strength and tensile properties, which solves the problem of low utilization rate caused by natural limitations such as irregularity and width of traditional genuine leather and surface trauma. The regenerated leather can be provided in length according to product requirements, and can be customized in various colors and textures according to customer needs. The road breaks through the limitations of genuine leather color and texture. The added temperature-sensitive hydrogel fiber can automatically adjust the gap between the fiber layers according to the ambient humidity, giving the material self-regulating breathability; there is fluff on both the upper and lower sides of the base fabric. The evenly distributed fluff structure can greatly improve the cross-linking degree between the base fabric layer and the cowhide fiber during hydroentanglement, thereby improving the bonding strength of each layer of the composite fabric. The double-suede base fabric layer has both the tensile strength of woven fabrics and the strong cross-linking of non-woven fabrics, which makes the regenerated cowhide fiber environmentally friendly leather have high transverse tensile strength and longitudinal bonding at the same time, thereby improving the durability of the regenerated cowhide fiber environmentally friendly leather. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of regenerated cowhide fiber environmentally friendly leather.

[0026] Figure 2 This is the fabric structure diagram of the double suede base fabric layer.

[0027] Figure 3 This is a warp cross-section of the double-pile base fabric layer.

[0028] Figure 4 This is a schematic diagram of the structure of the production line for regenerated cowhide fiber environmentally friendly leather.

[0029] Figure 5 It is a structural diagram of the carding machine. DETAILED DESCRIPTION

[0030] The present invention is further described below through specific embodiments.

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figure 1 As shown, the regenerated cowhide fiber environmentally friendly leather of the present invention comprises, from top to bottom, a cowhide fiber surface layer 10, a double-suede base fabric layer 20, and a cowhide fiber bottom layer 30. Fluff is distributed on both the upper and lower surfaces of the double-suede base fabric layer 20. The cowhide fibers of the cowhide fiber surface layer 10 and the cowhide fiber bottom layer 30 are cross-linked with the yarn fibers and fluff fibers of the double-suede base fabric layer 20. The base fabric introduced in the present invention has fluff distributed on both the upper and lower surfaces. The evenly distributed fluff structure can significantly increase the cross-linking degree between the base fabric layer and the cowhide fibers during hydroentanglement, thereby improving the bonding strength of the various layers of the composite fabric. The double-suede base fabric layer 20 has both the tensile strength of a woven fabric and the strong cross-linking properties of a non-woven fabric, resulting in the regenerated cowhide fiber environmentally friendly leather having both high transverse tensile strength and longitudinal bonding, thereby improving the durability of the regenerated cowhide fiber environmentally friendly leather.

[0033] The fabric structure of the double-pile base fabric layer 20 is a double-layer structure with binding warps. In the binding warp-binding double-layer structure, the surface warp and surface weft are interwoven to form the surface layer of the base fabric, and the inner warp and inner weft are interwoven to form the inner base fabric layer. The binding warp is interwoven with both the surface weft and the inner weft, so that the surface layer and the inner base fabric layer are interconnected. The double-pile base fabric layer 20 with this fabric structure has a double-layer fabric structure, thereby ensuring that the base fabric is piled on both sides while also maintaining sufficient strength. Because the binding warp fiber material is different from the surface warp and inner warp, it will not dissolve in alkali. Moreover, the binding warp is hidden between the surface layer and the inner layer, connecting the two layers together, and will not undergo physical changes during the napping process, which can ensure the connection strength between the surface layer and the inner layer.

[0034] In the double-layer weave with a binding warp, the surface weave is a two-up and two-down right twill weave, the lining weave is a one-up and three-down right twill weave, the warp yarns are arranged in the order of one surface warp, one lining warp, and one binding warp, and the weft yarns are arranged in the order of one surface weft, one lining weft. Figure 2The figure shows the fabric structure on the machine. The Chinese numbers 1, 2, 3 and 4 in the figure represent the surface warp and surface weft, the Roman numerals Ⅰ, Ⅱ, Ⅲ and Ⅳ represent the inner warp and inner weft, and the letters a, b, c and d represent the binding warp. In the figure, the surface warp and the surface weft are interwoven at the surface structure symbol "★", and the inner warp and the inner weft are interwoven at the inner structure symbol "☆". The binding symbol is "Δ", the heald lifting symbol is "0", and "□" indicates that the surface warp is not lifted when the inner weft is inserted. Figure 3 The figure shows a cross-section in the warp direction. The binding warp a is interwoven with the surface weft II and the inner weft III respectively. It is composed of two systems of yarns. The binding warp is hidden between the surface layer and the inner layer, connecting the two layers together, which stabilizes the structure and improves the service life of the fabric. Figure 3 As shown, after alkali treatment and sanding, fluff is formed on the inner and outer warp floats.

[0035] The surface warp and lining warp are island-in-the-sea yarns, which are made by combining island-in-the-sea yarns and high-shrinkage yarns through network processing. The island-in-the-sea yarns are made by composite spinning of the sea component and the island component. The sea component is low-viscosity PET, the island component is PBT / IPA copolymer, the high-shrinkage yarn is modified PET, the binding warp is high-strength PA66 filament, and the surface weft and lining weft are modified PA6 staple yarn. The low-viscosity PET used in the sea component has excellent alkali solubility and an intrinsic viscosity of 0.60dL / g. It acts as a continuous phase to wrap the island component, forming gaps between the villi after dissolution. The solubility rate is ≥98% under 10% NaOH, 90℃, and 30min. The PBT / IPA used in the island component is 10% NaOH, 90℃, and 30min. Copolymer, resistant to alkali hydrolysis, with a strength retention rate of ≥95% after alkali treatment, forming 16-petal radial ultrafine fibers with a diameter of 1-2μm and a specific surface area of 6-8m² / g, which enhance the hydroentangled cross-linking anchoring points; the high shrinkage yarn uses modified PET, preferably modified polyethylene terephthalate copolymer, and adds 8% isophthalic acid as a comonomer to the PET matrix to increase the shrinkage rate. 0.5% triphenyl phosphite is added as a heat stabilizer to inhibit thermal oxidative degradation during high-temperature shrinkage treatment. 1% nano-silica is added as an alkali-resistant additive and dispersed in the PET matrix to form an alkali-resistant barrier to improve alkali resistance. After copolymerization modification, it is dipped in 0.3% fluorocarbon resin solution to form an alkali-resistant coating, and the alkali adsorption amount is reduced by 40%. The percentages mentioned above are all weight percentages. The single yarn fineness is 75dtex / 36f, the cross-section is circular, the boiling water shrinkage rate is 38%, and the floating length of the island yarn is pulled during shrinkage. The sea-island yarns float on the upper and lower surfaces of the base fabric in the form of floating long lines. After being treated with alkali solution, the shaping state of the high shrinkage yarns will be broken, resulting in shrinkage. Subsequently, the sea component of the sea-island yarns dissolves as a continuous phase, while the island fibrils are wrapped around the high shrinkage yarns in a relaxed state. These island fibrils are composed of ultrafine fibers with extremely fine fiber diameters. After being sanded, they break, forming numerous fine and uniform tufts on the inner and outer surfaces of the base fabric. The tufts can effectively enhance the connection strength with the cowhide fibers. After testing, the regenerated cowhide fiber environmentally friendly leather made of double suede base fabric has a tuft density of 3000 fibers / cm², which is greatly improved compared to regenerated cowhide fiber leather made of ordinary fabric base fabric, such as plain or twill base fabric. The hydroentanglement cross-linking point is greatly increased. After SEM cross-section observation, the hydroentanglement cross-linking depth is doubled, and the interlayer peeling strength is increased by 30-40%, and the interlayer peeling strength is ≥80N / cm. The binding warp is hidden between the double-layer base fabric to reduce contact with alkali solution. The high-strength PA66 filament and modified PA6 staple yarn are both dipped in fluorocarbon resin solution to form an alkali-resistant coating, which reduces the amount of alkali adsorption and improves alkali resistance.

[0036] The raw materials for island-in-the-sea yarns are composed, by weight, of 65-70 parts low-viscosity PET, 35-40 parts PBT / IPA copolymer, 30-35 parts modified PET, and 0.6-0.8 parts of a web finish. The web finish is a polyether-based web finish with a molecular weight of 5000 and a friction coefficient of ≤0.25. This enhances the cohesion between the island-in-the-sea yarn and the high-shrinkage yarn, preventing fiber slippage during sanding and imparting antistatic properties.

[0037] The slurry of the cowhide fiber surface layer 10 and the cowhide fiber bottom layer 30 includes the following components in parts by weight: 90-100 parts of regenerated cowhide fiber, 5-8 parts of plant fiber, 8-10 parts of thermosensitive hydrogel fiber, 3-5 parts of nanocellulose whiskers, and 5-8 parts of water-based polyurethane. Among the components, the cowhide waste is obtained by beating and defibrillating to obtain regenerated cowhide fiber. The regenerated cowhide fiber in the cowhide fiber surface layer 10 and the cowhide fiber bottom layer 30 is the main body. Therefore, the regenerated cowhide fiber environmentally friendly leather produced has a feel close to that of genuine leather and has good tear strength and tensile properties, which solves the problem of low utilization rate of traditional genuine leather due to natural limitations such as irregularity, width, and surface trauma. The regenerated leather can provide length according to product requirements and can be customized in various colors and textures according to customer needs, breaking through the limitations of genuine leather color and texture; the plant fiber uses bamboo pulp fiber to enhance flexibility and breathability; nanocellulose whiskers increase cross-linking density and tear resistance; water-based polyurethane enhances interlayer bonding; thermosensitive water The gel fiber includes the following raw materials in parts by weight: 80-90 parts of N-isopropylacrylamide, 1-3 parts of a cross-linking agent, 5-10 parts of a hydrophilic modified monomer, and 0.5-2 parts of a dispersant. N-isopropylacrylamide (NIPAM) contains both a hydrophobic group (isopropyl) and a hydrophilic group (amide group), which can induce swelling or shrinkage through changes in environmental humidity, thereby adjusting the porosity of the fiber layer. The cross-linking agent uses N,N'-methylenebisacrylamide (MBA) to construct a three-dimensional network structure and enhance the mechanical strength and shape stability of the fiber. The hydrophilic modified monomer uses acrylamide (AM) or hydroxyethyl methacrylate (HEMA) to adjust the hygroscopic properties and improve the hydrophilicity and swelling degree. The dispersant uses polyvinyl alcohol (PVA). The raw material of the thermosensitive hydrogel fiber is prepared by polymerization reaction to obtain PNIPAM prepolymer, in which the PNIPAM (poly N-isopropylacrylamide) molecular chain is the main molecular chain of the PNIPAM prepolymer. It is then solidified into fibers through wet spinning or electrospinning process in a coagulation bath (such as ethanol aqueous solution), and finally stretched and dried to obtain the thermosensitive hydrogel fiber. The added thermosensitive hydrogel fiber can automatically adjust the gap between the fiber layers according to the ambient humidity, giving the material self-regulating air permeability and giving the fabric a dynamically responsive composite layer. Due to its swelling-shrinkage characteristics, the thermosensitive hydrogel fiber can achieve a 200% air permeability adjustment range. Under low humidity (<40% RH): the hydrophobic groups of the PNIPAM molecular chain dominate the fiber contraction, the volume decreases by 25%-30%, the porosity of the fiber layer drops from 60% to 30%, and the air circulation resistance increases. Under high humidity (>60% RH): water molecules form hydrogen bonds with the PNIPAM hydrophilic groups (-CONH-), the fiber swells, the volume increases by 40%-50%, the porosity increases to 70%-80%, and the air permeability is significantly improved; because the tufts on the surface of the double suede base fabric form three-dimensional air guide channels, the gap change effect of the thermosensitive fiber is amplified, so that the overall air permeability adjustment is improved.

[0038] like Figure 4 The production line of regenerated cowhide fiber environmentally friendly leather includes an inclined wire papermaking machine 1, a base fabric unwinding machine 2, a base fabric belt conveyor 3, a composite belt conveyor 4, a water spunlace device and a drying device. There are two inclined wire papermaking machines 1, the base fabric unwinding machine 2 is located at the front end of the base fabric belt conveyor 3, the water spunlace device and the drying device are arranged in sequence at the rear end of the composite belt conveyor 4, and a carding machine 5 is provided at the end of the base fabric belt conveyor 3. The base fabric combed by the carding machine 5 is combined with the cowhide fiber material produced by the two inclined wire papermaking machines 1 and then enters the composite belt conveyor 4; the carding machine 5 is provided with an upper combing tooth roller 51 and a lower combing tooth roller 52 arranged oppositely, followed by an upper air knife 53 and a lower suction roller 54 arranged oppositely, and finally an upper ion wind rod 55 and a lower ion wind rod 56 arranged oppositely. The base fabric passes through the gap between the upper comb roller 51 and the lower comb roller 52, the gap between the upper air knife 53 and the lower suction roller 54, and the gap between the upper ion wind rod 55 and the lower ion wind rod 56. The upper comb roller 51 and the lower comb roller 52 comb the fluff, transforming the fluff from clustered aggregates into single fibers. The upper air knife 53 blows away the surface fluff, and the lower suction roller 54 absorbs and straightens the bottom surface fluff, forming a three-dimensional fluff structure that is symmetrical from top to bottom. The upper ion wind rod 55 and the lower ion wind rod 56 eliminate static electricity in the fluff, preventing the fibers from agglomerating due to static electricity. By adding a three-stage treatment system of double-sided comb rollers, dual airflow dispersion, and electrostatic activation at the rear end of the base fabric belt conveyor 3, efficient dispersion and orientation of the fluff on the upper and lower sides of the double-pile base fabric are achieved, solving the problems of fluff agglomeration and low penetration rate, and increasing the hydroentanglement crosslinking density.

[0039] The production process of regenerated cowhide fiber environmentally friendly leather includes the following steps:

[0040] Step a, preparing a double-suede base fabric;

[0041] Step b, the pulp is made into kraft fiber material through the inclined wire papermaking machine 1;

[0042] Step c, unwinding the prefabricated double-suede base fabric through the base fabric unwinding machine 2;

[0043] Step d: The double suede base fabric is transported by the base fabric belt conveyor 3 and sandwiched between the kraft fiber materials produced by the two inclined wire papermaking machines 1, and finally stacked on the composite belt conveyor 4 to form a sandwich structure fabric;

[0044] Step e: the fabric enters the spunlace device, and the cowhide fiber surface layer 10, the double suede base fabric layer 20 and the cowhide fiber bottom layer 30 are spunlace-compounded by the spunlace machine;

[0045] Step f: The composite substrate after spunlace is sequentially subjected to rolling drying, drum drying, removal of harmful substances, and rotary screen drying, and finally rolled up.

[0046] The preparation process of double suede base fabric is as follows:

[0047] Step a, preparing island-in-the-sea yarn;

[0048] Step b, weaving a base fabric with a double-layer structure;

[0049] Step c, alkali treatment: alkali treatment was performed using 10% NaOH solution at 90°C for 30 min;

[0050] Step d, double-sided sanding: double-sided sanding is performed using a ceramic sanding disc at a rotation speed of 1500 rpm and a pressure of 0.15 MPa.

[0051] The island-in-the-sea yarn production process is as follows: After melting the sea component and island component chips, they are passed through an island-in-the-sea spinneret to form island-in-the-sea yarns with a 16-island structure. The island-in-the-sea yarns are then interwoven with high-shrinkage yarns in a proportional manner to form the island-in-the-sea yarns, which are then treated with a polyether interwoven finish. The interwoven nozzle pressure is 0.6 MPa, the polyether interwoven finish concentration is 0.8%, and the dipping speed is 20 m / min, ensuring a fiber surface friction coefficient of ≤0.25.

[0052] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. Regenerated cowhide fiber environmentally friendly leather, characterized by: From top to bottom, it includes a cowhide fiber surface layer, a double-suede base fabric layer and a cowhide fiber bottom layer. Fluff is distributed on both the upper and lower surfaces of the double-suede base fabric layer. The cowhide fibers of the cowhide fiber surface layer and the cowhide fiber bottom layer are cross-linked with the yarn fibers and the fluff fibers of the double-suede base fabric layer. The fabric structure of the double-suede base fabric layer is a binding warp binding double-layer structure. In the binding warp binding double-layer structure, the surface warp and the surface weft are interwoven into the base fabric surface layer, and the inner warp and the inner weft are interwoven into the base fabric lining layer. The binding warp is interwoven with the surface weft and the inner weft at the same time, so that the base fabric surface layer and the base fabric lining layer are connected to each other. The surface warp and the inner warp are island yarns, and the island yarns are composited by network processing of island yarns and high shrinkage yarns. The island yarns are composited by spinning sea components coated with island components. The sea component is low-viscosity PET, the island component is PBT / IPA copolymer, the high shrinkage yarn is modified PET, and the binding warp is high-strength PA66 The filament, surface weft and lining weft are modified PA6 staple yarns. The raw materials of the island yarn include the following components in parts by weight: 65-70 parts of low-viscosity PET, 35-40 parts of PBT / IPA copolymer, 30-35 parts of modified PET, and 0.6-0.8 parts of network oil. The slurry of the cowhide fiber surface layer and the cowhide fiber bottom layer includes the following components in parts by weight: 90-100 parts of regenerated cowhide fiber, 5-8 parts of plant fiber, 8-10 parts of temperature-sensitive hydrogel fiber, 3-5 parts of nanocellulose whiskers, and 5-8 parts of water-based polyurethane.

2. The regenerated cowhide fiber environmentally friendly leather according to claim 1, characterized in that: In the double-layer binding warp structure, the surface structure is a two-up and two-down right twill structure, the lining structure is a one-up and three-down right twill structure, the warp yarn arrangement order is one surface warp, one lining warp, and one binding warp, and the weft yarn arrangement order is one surface weft, one lining weft.

3. The regenerated cowhide fiber environmentally friendly leather according to claim 1, characterized in that: The production line of the regenerated cowhide fiber environmentally friendly leather includes an inclined wire papermaking machine, a base fabric unwinding machine, a base fabric belt conveyor, a composite belt conveyor, a water spunlace device and a drying device. There are two inclined wire papermaking machines, the base fabric unwinding machine is located at the front end of the base fabric belt conveyor, the water spunlace device and the drying device are arranged in sequence at the rear end of the composite belt conveyor, and a carding machine is provided at the end of the base fabric belt conveyor. The carding machine is provided with an upper comb tooth roller and a lower comb tooth roller arranged oppositely, followed by an upper air knife and a lower suction roller arranged oppositely, and finally an upper ion wind rod and a lower ion wind rod arranged oppositely.

4. The production process of regenerated cowhide fiber environmentally friendly leather according to any one of claims 1-2, characterized in that: The steps include: Step a, preparing a double-suede base fabric; Step b, the pulp is made into kraft fiber material through an inclined wire papermaking machine; Step c, unwinding the prefabricated double-suede base fabric through a base fabric unwinding machine; Step d: The double suede base fabric is conveyed by a base fabric belt conveyor and sandwiched between the kraft fiber materials produced by two inclined wire papermaking machines, and finally stacked on a composite belt conveyor to form a sandwich structure fabric; Step e: the fabric enters the spunlace device, and the cowhide fiber surface layer, the double suede base fabric layer and the cowhide fiber bottom layer are spunlace-laminated by the spunlace machine; Step f: The composite substrate after spunlace is sequentially subjected to rolling drying, drum drying, removal of harmful substances, and rotary screen drying, and finally rolled up.

5. The production process of regenerated cowhide fiber environmentally friendly leather according to claim 4, characterized in that: The preparation process of the double suede base fabric is as follows: Step a, preparing island-in-the-sea yarn; Step b, weaving a base fabric with a double-layer structure; Step c, alkali treatment: alkali treatment was performed using 10% NaOH solution at 90°C for 30 min; Step d, double-sided sanding: double-sided sanding is performed using a ceramic sanding disc at a rotation speed of 1500 rpm and a pressure of 0.15 MPa.

6. The process for producing environmentally friendly regenerated cowhide fiber leather according to claim 4, characterized in that: The preparation process of the island-in-the-sea yarn is as follows: after the sea component slices and the island component slices are melted, the island-in-the-sea yarn with a 16-island structure is formed through an island-in-the-sea spinneret; the island-in-the-sea yarn and the high shrinkage yarn are proportionally networked to synthesize the island-in-the-sea yarn, and the yarn is treated with a polyether network oil agent.

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