A leather-based fabric production line and preparation process based on a leather substrate with ultra-high physical properties

Abstract

The present invention discloses a leather base fabric production line and a preparation process based on a super-high physical property leather substrate. The leather base fabric production line includes a pretreatment equipment group for making the super-high physical property leather substrate and a post-treatment equipment group for laying cowhide fibers and hydroentangling on the super-high physical property leather substrate to form a leather base fabric. The pretreatment equipment group includes a fiber reorientation non-woven fiber web layer forming equipment group, a woven fabric unwinder, a first multi-layer web area provided at the output end of the fiber reorientation non-woven fiber web layer forming equipment group, and a needling equipment group connected after the first multi-layer web area for needling and winding the woven fabric and the fiber reorientation non-woven fiber web layer laid on the first multi-layer web area to form the super-high physical property leather substrate. The output fabric of the woven fabric unwinder is connected to the first multi-layer web area. The present invention improves the tearing strength of the cowhide fiber leather base fabric, improves the balance of the longitudinal and weft tearing strengths of the cowhide fiber leather base fabric, and reduces the production cost of the cowhide fiber leather base fabric.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial leather production equipment, and particularly relates to a leather base fabric production line and preparation process based on a leather substrate with ultra-high physical properties. Background Art

[0002] Cowhide fiber base fabric is a basic fabric for producing simulated cowhide formed by taking cowhide fiber as the main raw material, proportioning a certain proportion of chemical fibers, and performing hydroentangling treatment after fiber web laying and web laying, which is called cowhide fiber base fabric. After the cowhide fiber base fabric is subjected to single-sided impregnation treatment with water-based PU material and a PU film is attached to the impregnated side of the cowhide fiber base fabric, it becomes simulated cowhide. There are two types of cowhide fiber raw materials used in the cowhide fiber base fabric produced by our company at present. One is to use the scraps of genuine cowhide and directly obtain cowhide fibers by means of mechanical cutting and forming; the other is to use post-consumer recycled leather products, and obtain reusable cowhide fibers after special purification process treatment. The above production process of making cowhide fiber base fabric from recycled leather has the advantages of being green, low-carbon and environmentally friendly, and has good air permeability and strong sense of genuine leather, and has been fully recognized in the domestic and foreign markets, and has now been widely used in many occasions such as clothing, shoes, sofas, etc. At present, the authorized invention patents related to the cowhide fiber base fabric produced by our company include a preparation process for a fully penetrated cowhide fiber leather base fabric (patent number ZL201910270503.3), a post-treatment process for a water-based cowhide fiber leather base fabric (patent number ZL201910270574.3), a preparation process for a hydroentangled circular cowhide leather (patent number ZL201910270199.2), etc.

[0003] However, there are also areas that need further improvement in the above production process technology of cowhide fiber base fabric:

[0004] First, the transverse tear strength of the produced cowhide fiber base fabric is relatively good, but the longitudinal tear strength is relatively low.

[0005] Second, the softness and hand feeling of the cowhide fiber base fabric need to be improved.

[0006] Third, the existing production line for cowhide fiber leather base fabric is long and the process is relatively complex, which increases the production cost of the product to a certain extent.

[0007] Therefore, it is necessary to innovate and improve the existing production technology of cowhide fiber leather base fabric to solve the above problems. Summary of the Invention

[0008] To solve the above problems, the present invention proposes a leather base fabric production line and preparation process based on a super-high physical property leather substrate, aiming to improve the tear strength of the bovine fiber leather base fabric, enhance the balance of the longitudinal and weft tear strengths of the bovine fiber leather base fabric, and reduce the production cost of the bovine fiber leather base fabric. The specific technical solutions are as follows:

[0009] A leather base fabric production line based on a super-high physical property leather substrate, comprising a pretreatment equipment group for making the super-high physical property leather substrate and a post-treatment equipment group arranged after the pretreatment equipment group for carrying out cowhide fiber web laying and hydroentangling on the super-high physical property leather substrate to form a leather base fabric; wherein, the pretreatment equipment group includes a fiber reorientation non-woven fiber web forming equipment group for forming a fiber reorientation non-woven fiber web layer, a woven fabric unwinder for unwinding the woven fabric for web laying, a first web stacking area arranged at the output end of the fiber reorientation non-woven fiber web forming equipment group for laying the fiber reorientation non-woven fiber web layer on the woven fabric, and a needling equipment group connected after the first web stacking area for carrying out needling and winding treatment on the woven fabric and the fiber reorientation non-woven fiber web layer laid on the first web stacking area to form the super-high physical property leather substrate, and the output fabric of the woven fabric unwinder is connected to the first web stacking area.

[0010] In the present invention, the fiber reorientation non-woven fiber web forming equipment group includes, in sequence, a non-woven fiber proportioning and mixing equipment for proportioning and mixing non-woven fibers, a carding machine for carding the proportioned and mixed non-woven fiber raw materials into a thin fiber web, a Z-shaped reciprocating web laying machine for forming a thick fiber web by reciprocatingly laying and laminating the thin fiber web in a Z-shaped pattern, and a thick fiber web fiber reorientation equipment for reorienting the upper and lower layer fibers of the thick fiber web longitudinally to form the fiber reorientation non-woven fiber web layer.

[0011] In the present invention, the Z-shaped reciprocating web laying machine is respectively provided with a thin fiber web input channel for docking the carding machine and a thick fiber web output channel for docking the fiber reorientation equipment, and the thin fiber web input channel and the thick fiber web output channel are perpendicular to each other, and the reciprocating direction of the Z-shaped reciprocating web laying is arranged transversely with respect to the thick fiber web output channel.

[0012] Preferably, the thick fiber web fiber redirecting device includes several groups of annular saw blade redirecting rollers rotatably arranged. Each group of annular saw blade redirecting rollers includes a front annular saw blade redirecting roller, a middle annular saw blade redirecting roller, and a rear annular saw blade redirecting roller arranged in sequence along the forward conveying direction of the thick fiber web. The front annular saw blade redirecting roller and the rear annular saw blade redirecting roller are in contact with the lower surface of the thick fiber web, and the middle annular saw blade redirecting roller is in contact with the upper surface of the thick fiber web. Among them, the rotation direction of the front annular saw blade redirecting roller points forward tangentially at the contact part with the thick fiber web, and the rotation directions of the front annular saw blade redirecting roller and the middle annular saw blade redirecting roller point backward tangentially at the contact parts with the thick fiber web, thereby forming the fiber redirecting operation of the thick fiber web.

[0013] Preferably, the needling equipment group includes a first needling and straight needling machine, a second needling and straight needling machine, and a third needling and straight needling machine arranged in sequence.

[0014] In the present invention, the post-treatment equipment group includes a bovine fiber proportioning and mixing equipment for bovine fiber batching and mixing, a bovine fiber laying machine for laying the proportioned and mixed bovine fibers on the ultra-high physical property leather substrate, and a hydroentangling equipment group for hydroentangling the laid ultra-high physical property leather substrate and bovine fibers. Among them, the bovine fiber proportioning and mixing equipment is connected to the bovine fiber laying machine, and a second overlapping net area is provided on the bovine fiber laying machine. The ultra-high physical property leather substrate output from the needling equipment group is connected to the second overlapping net area.

[0015] Preferably, the hydroentangling equipment group includes a first hydroentangling machine, a second hydroentangling machine, and a third hydroentangling machine arranged in sequence according to the hydroentangling process. Among them, the first hydroentangling machine is a hydroentangling pre-needling machine for performing low-pressure hydroentangling on the ultra-high physical property leather substrate and bovine fibers after laying and laminating; the second hydroentangling machine is a hydroentangling middle-needling machine for performing medium-pressure hydroentangling on the laminated layer after low-pressure hydroentangling; the third hydroentangling machine is a hydroentangling fixing machine for performing high-pressure hydroentangling on the laminated layer after medium-pressure hydroentangling.

[0016] Among them, the hydroentangling pressure of the hydroentangling pre-needling machine is 3 - 4 Mpa, the hydroentangling pressure of the hydroentangling middle-needling machine is 7 - 10 Mpa, and the hydroentangling pressure of the hydroentangling fixing machine is 18 - 26 Mpa.

[0017] Preferably, the post-treatment equipment group further includes a squeezing and water-absorbing machine, a dryer, a trimming machine, and a winding machine arranged after the hydroentangling equipment group for sequentially performing water removal, drying, trimming, and winding on the leather base fabric after hydroentangling.

[0018] More preferably, a calender and a leather grinding machine can be sequentially arranged between the trimming machine and the winding machine.

[0019] Preferably, the fabric released by the fabric unwinder is TC fabric, and the non-woven fiber is cotton fiber or chemical fiber.

[0020] A pre-treatment equipment group for manufacturing a super-high physical property leather substrate, comprising a fiber reorientation non-woven fiber web forming equipment group for forming a fiber reorientation non-woven fiber web layer, a fabric unwinder for unwinding a fabric for web laying, a first laminating area provided at the output end of the fiber reorientation non-woven fiber web forming equipment group for laminating the fiber reorientation non-woven fiber web layer on the fabric, and a needling equipment group connected after the first laminating area for performing needling winding treatment on the fabric and the fiber reorientation non-woven fiber web layer laminated on the first laminating area to form a super-high physical property leather substrate, and the output fabric of the fabric unwinder is connected to the first laminating area; wherein, the fiber reorientation non-woven fiber web forming equipment group includes, arranged in sequence, a non-woven fiber proportioning and mixing equipment for proportioning and mixing non-woven fibers, a carding machine for carding the proportioned and mixed non-woven fiber raw materials into a thin fiber web, a Z-shaped reciprocating web laying machine for forming a thick fiber web by Z-shaped alternating reciprocating web laying and laminating of the carded thin fiber web, and a thick fiber web fiber reorientation equipment for reorienting the upper part of the fibers and the lower part of the fibers of the thick fiber web longitudinally to form the fiber reorientation non-woven fiber web layer.

[0021] In the present invention, a wet cowhide fiber transfer net moving in a circumferential cycle is provided above the second laminating area of the cowhide fiber web laying machine, a substrate supporting net is provided below the second laminating area of the cowhide fiber web laying machine, and the super-high physical property leather substrate output by the needling equipment group enters the position between the lower part of the wet cowhide fiber transfer net and the upper part of the substrate supporting net in the second laminating area, and the wet cowhide fiber web formed on the wet cowhide fiber transfer net is transferred and laminated on the super-high physical property leather substrate through the circumferential movement of the wet cowhide fiber transfer net; a cowhide fiber aqueous slurry discharge port is provided above the wet cowhide fiber transfer net, and the size of the discharge port can be adjusted; a plurality of vacuum water suction devices are arranged at intervals inside the upper part of the wet cowhide fiber transfer net.

[0022] Preferably, the wet cowhide fiber transfer net is a polyurethane inclined net.

[0023] Preferably, the slurry concentration of the cowhide fiber aqueous slurry discharge port is adjustable from 1 to 5‰.

[0024] Preferably, a plurality of groups of ironing rollers are provided between the extrusion water suction machine and the dryer.

[0025] As a further improvement of the present invention, the spunlace equipment group further includes a nip-type spunlace machine disposed on the second multi-layer screen area. The nip-type spunlace machine is used to perform a spunlace operation on the super-high physical property leather substrate with a multi-layered kraft fiber web after the wet kraft fiber web is transferred and laminated onto the super-high physical property leather substrate, under the condition that the wet kraft fiber transfer web and the substrate supporting web are clamped up and down.

[0026] When necessary, several nip-type spunlace machines can be provided and arranged at the laminated part clamped by the wet kraft fiber transfer web and the substrate supporting web, so as to further enhance the uniformity of fiber distribution after lamination and the flatness of the base fabric after spunlace.

[0027] Preferably, the spunlace pressure of the nip-type spunlace machine is 3 - 4 Mpa.

[0028] A leather base fabric preparation process for a leather base fabric production line based on a super-high physical property leather substrate, characterized by comprising the following steps:

[0029] (1) Fabrication of the super-high physical property leather substrate; using a pre-treatment equipment group to fabricate the super-high physical property leather substrate;

[0030] (2) Kraft fiber web laying: using a kraft fiber web laying machine, discharging the kraft fiber aqueous slurry onto the wet kraft fiber transfer web to form a kraft fiber web and transferring and laminating it onto the super-high physical property leather substrate located in the second multi-layer screen area;

[0031] (3) Nip-type spunlace: using the nip-type spunlace machine disposed in the second multi-layer screen area to perform nip-type spunlace on the laminated super-high physical property leather substrate with the kraft fiber web laid thereon, so as to improve the strength and flatness of the leather substrate after subsequent spunlace;

[0032] (4) Three-stage spunlace: using a first spunlace machine, a second spunlace machine, and a third spunlace machine to perform pre-spunlace, mid-spunlace, and final-spunlace on the laminated super-high physical property leather substrate with the kraft fiber web laid thereon in sequence to form a leather base fabric of the super-high physical property leather substrate;

[0033] (5) Pressing, ironing, and drying:

[0034] (6) Trimming and winding.

[0035] The beneficial effects of the present invention are:

[0036] First, in a leather base fabric production line and preparation process based on a super-high physical property leather substrate of the present invention, a thick fiber web fiber redirecting device is provided in the pretreatment equipment group, which can redirect the upper and lower part fibers of the thick fiber web longitudinally to form a fiber redirected non-woven fiber web layer. This fiber redirected non-woven fiber web layer has a three-layer composite structure, where the middle layer is an ordinary fiber laying layer without fiber redirection, and about 30-70% of the fibers in the upper and lower layers are redirected and their fiber directions are arranged along the longitudinal direction of the woven fabric after redirection. After the fiber redirected non-woven fiber web layer with this three-layer composite structure is laminated and needled with the woven fabric, on the one hand, the relative slippage between the woven fibers in the woven fabric can be eliminated, thereby greatly improving the overall tear strength of the substrate; on the other hand, since the non-woven fiber web layer has been redirected, it can play a role in strengthening the longitudinal tear strength of the leather substrate, thus overcoming the drawback that the longitudinal tear strength of the conventional bovine fiber leather base fabric is relatively low.

[0037] Second, in a leather base fabric production line and preparation process based on a super-high physical property leather substrate of the present invention, due to the high tear strength of the produced super-high physical property leather substrate, in the subsequent process of making the base fabric such as bovine fiber laying and hydroentangling on the basis of this super-high physical property leather substrate, the process of single-sided impregnation treatment on the bovine fiber leather base fabric in the past can be omitted. Thus, on the one hand, the production process of the bovine fiber leather base fabric is simplified and the production cost is reduced; on the other hand, the produced bovine fiber leather base fabric is also softer and has a better hand feeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a layout schematic diagram of a leather base fabric production line based on a super-high physical property leather substrate of the present invention;

[0039] Figure 2 is a detailed layout schematic diagram of a carding machine, a Z-shaped alternating reciprocating laying machine and a fiber redirecting device;

[0040] Figure 3 is a structural schematic diagram of one group of annular saw blade redirecting rollers on the fiber redirecting device;

[0041] Figure 4 is a structural schematic diagram of a nip hydroentangling machine arranged on the second superimposed netting area of the bovine fiber laying machine. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The following combines the drawings and embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0043] Example 1:

[0044] As Figures 1 to 3The following is an embodiment of a leather base fabric production line based on a super-high physical property leather base material of the present invention, including a pretreatment equipment group for making the super-high physical property leather base material and a post-treatment equipment group arranged after the pretreatment equipment group for laying cowhide fibers and hydroentangling on the super-high physical property leather base material to form a leather base fabric; wherein, the pretreatment equipment group includes a fiber reorientation non-woven fiber web forming equipment group for forming a fiber reorientation non-woven fiber web layer, a woven fabric unwinder for unwinding the woven fabric for laying, a first web stacking area arranged at the output end of the fiber reorientation non-woven fiber web forming equipment group for laying the fiber reorientation non-woven fiber web layer on the woven fabric, and a needling equipment group connected after the first web stacking area for needling and winding the woven fabric and the fiber reorientation non-woven fiber web layer laid on the first web stacking area to form a super-high physical property leather base material, and the output fabric of the woven fabric unwinder is connected to the first web stacking area.

[0045] In this embodiment, the fiber reorientation non-woven fiber web forming equipment group includes a non-woven fiber proportioning and mixing equipment arranged in sequence for proportioning and mixing non-woven fibers, a carding machine for carding the proportioned and mixed non-woven fiber raw materials into a thin fiber web, a Z-shaped alternating reciprocating web laying machine for forming a thick fiber web by Z-shaped alternating reciprocating web laying and stacking of the carded thin fiber web, and a thick fiber web fiber reorientation equipment for reorienting the upper and lower part fibers of the thick fiber web longitudinally to form the fiber reorientation non-woven fiber web layer.

[0046] In this embodiment, the Z-shaped alternating reciprocating web laying machine is respectively provided with a thin fiber web input channel for docking the carding machine and a thick fiber web output channel for docking the fiber reorientation equipment, and the thin fiber web input channel and the thick fiber web output channel are perpendicular to each other, and the reciprocating direction of the Z-shaped alternating reciprocating web laying is transversely arranged relative to the thick fiber web output channel.

[0047] Preferably, the thick fiber web fiber reorientation equipment includes a plurality of groups of annular saw blade reorientation rollers rotatably arranged, and each group of annular saw blade reorientation rollers includes a front annular saw blade reorientation roller, a middle annular saw blade reorientation roller and a rear annular saw blade reorientation roller arranged in sequence in the forward conveying direction of the thick fiber web, and the front annular saw blade reorientation roller and the rear annular saw blade reorientation roller are in contact with the lower surface of the thick fiber web, and the middle annular saw blade reorientation roller is in contact with the upper surface of the thick fiber web; wherein, the rotational direction of the front annular saw blade reorientation roller points forward in the tangential direction at the contact part with the thick fiber web, and the rotational directions of the front annular saw blade reorientation roller and the middle annular saw blade reorientation roller point backward in the tangential direction at the contact part with the thick fiber web, so as to form the fiber reorientation operation of the thick fiber web.

[0048] Preferably, the needling equipment group includes a first needling right-needling machine, a second needling right-needling machine, and a third needling right-needling machine arranged in sequence.

[0049] In this embodiment, the post-treatment equipment group includes a bovine fiber proportioning and mixing equipment for bovine fiber batching and mixing, a bovine fiber web laying machine for laying the proportioned and mixed bovine fibers on the ultra-high physical property leather substrate, and a hydroentangling equipment group for hydroentangling the ultra-high physical property leather substrate and bovine fibers after web laying; wherein, the bovine fiber proportioning and mixing equipment is connected to the bovine fiber web laying machine, and a second multi-layer web area is provided on the bovine fiber web laying machine, and the ultra-high physical property leather substrate output from the needling equipment group is connected to the second multi-layer web area.

[0050] Preferably, the hydroentangling equipment group includes a first hydroentangling machine, a second hydroentangling machine, and a third hydroentangling machine arranged in sequence according to the hydroentangling process; wherein, the first hydroentangling machine is a hydroentangling pre-needling machine for performing low-pressure hydroentangling on the ultra-high physical property leather substrate and bovine fibers after web laying and laminating; the second hydroentangling machine is a hydroentangling middle-needling machine for performing medium-pressure hydroentangling on the laminated layer after low-pressure hydroentangling; the third hydroentangling machine is a hydroentangling fixing machine for performing high-pressure hydroentangling on the laminated layer after medium-pressure hydroentangling.

[0051] Among them, the hydroentangling pressure of the hydroentangling pre-needling machine is 3-4 Mpa, the hydroentangling pressure of the hydroentangling middle-needling machine is 7-10 Mpa, and the hydroentangling pressure of the hydroentangling fixing machine is 18-26 Mpa.

[0052] Preferably, the post-treatment equipment group further includes a squeezing water absorber, a dryer, a trimming machine, and a rewinder arranged after the hydroentangling equipment group for sequentially dewatering, drying, trimming, and winding the hydroentangled leather base fabric.

[0053] More preferably, a calender and a leather grinding machine can be sequentially arranged between the trimming machine and the rewinder.

[0054] Preferably, the fabric released by the woven fabric unwinder is TC fabric, and the non-woven fiber is cotton fiber or chemical fiber.

[0055] Embodiment 2:

[0056] As Figures 1 to 3As shown in the figure, a pretreatment equipment group for manufacturing a super-high physical property leather substrate includes a fiber reorientation non-woven fiber web layer forming equipment group for forming a fiber reorientation non-woven fiber web layer, a woven fabric unwinder for unwinding the woven fabric for web laying, a first web stacking area provided at the output end of the fiber reorientation non-woven fiber web layer forming equipment group for stacking the fiber reorientation non-woven fiber web layer on the woven fabric, and a needling equipment group connected after the first web stacking area for performing needling winding treatment on the woven fabric and the fiber reorientation non-woven fiber web layer stacked on the first web stacking area to form a super-high physical property leather substrate. The output fabric of the woven fabric unwinder is connected to the first web stacking area. Among them, the fiber reorientation non-woven fiber web layer forming equipment group includes a non-woven fiber proportioning and mixing equipment for proportioning and mixing non-woven fibers in sequence, a carding machine for carding the proportioned and mixed non-woven fiber raw materials into a thin fiber web, a Z-shaped alternating reciprocating web laying machine for forming a thick fiber web by Z-shaped alternating reciprocating web laying and laminating of the carded thin fiber web, and a thick fiber web fiber reorientation equipment for reorienting the upper and lower part fibers of the thick fiber web longitudinally to form the fiber reorientation non-woven fiber web layer.

[0057] In the present invention, a wet cowhide fiber transfer net that moves circularly along the circumference is provided above the second web stacking area of the cowhide fiber web laying machine. A substrate supporting net is provided below the second web stacking area of the cowhide fiber web laying machine. The super-high physical property leather substrate output by the needling equipment group enters the position between the lower part of the wet cowhide fiber transfer net and the upper part of the substrate supporting net in the second web stacking area. The wet cowhide fiber web formed on the wet cowhide fiber transfer net is transferred and laminated on the super-high physical property leather substrate through the circumferential movement of the wet cowhide fiber transfer net. Above the wet cowhide fiber transfer net, there is a cowhide fiber water-based slurry discharge port, and the size of the discharge port can be adjusted. Inside the upper part of the wet cowhide fiber transfer net, a number of vacuum water absorbers are arranged at intervals.

[0058] Preferably, the wet cowhide fiber transfer net adopts a polyurethane inclined net.

[0059] Preferably, the slurry concentration of the cowhide fiber water-based slurry discharge port is adjustable from 1‰ to 5‰.

[0060] Preferably, a number of groups of calender rolls are provided between the squeezing water absorber and the dryer.

[0061] As a further improvement of the present invention, the hydroentangling equipment group further includes a nip hydroentangling machine provided on the second web stacking area. The nip hydroentangling machine is used to perform hydroentangling operations on the super-high physical property leather substrate laminated with the cowhide fiber web under the condition that the wet cowhide fiber transfer net and the substrate supporting net are clamped up and down after the wet cowhide fiber web is transferred and laminated onto the super-high physical property leather substrate.

[0062] When necessary, several flat screen hydroentangling machines can be set up and arranged at the laminated part clamped by the wet kraft fiber transfer net and the substrate supporting net to further enhance the uniformity of fiber distribution after lamination and the flatness of the base fabric after hydroentangling.

[0063] Preferably, the hydroentangling pressure of the flat screen hydroentangling machine is 3 - 4 Mpa.

[0064] Example 3:

[0065] A leather base fabric preparation process for a leather base fabric production line based on a super-high physical property leather substrate of Example 1 includes the following steps:

[0066] (1) Production of the super-high physical property leather substrate; using the pretreatment equipment group to produce the super-high physical property leather substrate;

[0067] (2) Kraft fiber web laying: Using a kraft fiber web laying machine, discharging the kraft fiber aqueous slurry onto the wet kraft fiber transfer net to form a kraft fiber web and transferring and laminating it onto the upper surface of the super-high physical property leather substrate located in the second double net area;

[0068] (3) Flat screen hydroentangling: Using the flat screen hydroentangling machine set in the second double net area to perform flat screen hydroentangling on the laminate of the super-high physical property leather substrate with the kraft fiber web laid thereon to improve the strength and flatness of the leather substrate after subsequent hydroentangling;

[0069] (4) Three-stage hydroentangling: Using the first hydroentangling machine, the second hydroentangling machine, and the second hydroentangling machine to perform pre-hydroentangling, medium-hydroentangling, and final-hydroentangling on the laminate of the super-high physical property leather substrate with the kraft fiber web laid thereon in sequence to form the leather base fabric of the super-high physical property leather substrate;

[0070] (5) Pressing dry, ironing, and drying:

[0071] (6) Trimming and winding.

[0072] Example 4:

[0073] Adopting the leather base fabric preparation process of a leather base fabric production line based on a super-high physical property leather substrate of Example 3, the woven fabric uses a TC woven fabric with a gram weight of 50 g / m², and the fiber reoriented non-woven fiber web layer uses a cotton fiber reoriented non-woven fiber web layer with a gram weight of 50 g / m². After the two are laminated and subjected to three-stage needle punching and straight punching, a super-high physical property leather substrate is obtained. It is tested on a tear strength testing machine, and the measured tear strength is 9 Kgf. After the above leather substrate is subjected to kraft fiber web laying, hydroentangling, and drying, the measured tear strength of the leather base fabric is 9 Kgf.

[0074] Example 5:

[0075] Adopt the leather base fabric preparation process of a leather base fabric production line based on a super-high physical property leather base material in Example 3. Use a TC woven fabric finished product with a gram weight of 50 g / m² and a cotton fiber non-woven fabric finished product with a gram weight of 50 g / m². After the two are laminated, they are subjected to three passes of straight needling to obtain a leather base material for test comparison. Test it on a tear strength tester, and the measured tear strength is 7 Kgf. After the above leather base material is subjected to laying and hydroentangling of cowhide fibers and then dried, the measured tear strength of the leather base fabric is 7 Kgf.

[0076] Example 6:

[0077] Adopt two pieces of TC woven fabric finished products with a gram weight of 50 g / m². After the two pieces of TC woven fabric are laminated, they are subjected to three passes of straight needling to obtain a leather base material for test comparison. Test it on a tear strength tester, and the measured tear strength is 6 Kgf. After the above leather base material for test comparison is subjected to laying and hydroentangling of cowhide fibers and then dried, the measured tear strength of the leather base fabric is 6 Kgf.

[0078] Comparing the above Example 4 with Example 5 and Example 6, it can be seen that the tear strength of the leather base material in Example 4 is increased by 28.6% compared with Example 5, and the tear strength of the leather base fabric in Example 4 is increased by 28.6% compared with Example 5; the tear strength of the leather base material in Example 4 is increased by 50% compared with Example 6, and the tear strength of the leather base fabric in Example 4 is increased by 50% compared with Example 6.

[0079] The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A leather base fabric production line based on a leather substrate with ultra-high physical properties, characterized in that, It includes a pretreatment equipment group for manufacturing a super-high physical property leather substrate and a post-treatment equipment group arranged after the pretreatment equipment group for carrying out bovine fiber web laying and hydroentangling on the super-high physical property leather substrate to form a leather base fabric; wherein, the pretreatment equipment group includes a fiber redirected nonwoven fiber web layer forming equipment group for forming a fiber redirected nonwoven fiber web layer, a woven fabric unwinder for unwinding the woven fabric for web laying, a first web stacking area arranged at the output end of the fiber redirected nonwoven fiber web layer forming equipment group for stacking the fiber redirected nonwoven fiber web layer on the woven fabric, and a needling equipment group connected after the first web stacking area for carrying out needling winding treatment on the woven fabric and the fiber redirected nonwoven fiber web layer stacked on the first web stacking area to form a super-high physical property leather substrate, and the output fabric of the woven fabric unwinder is connected to the first web stacking area; The post-treatment equipment group includes a bovine fiber proportioning and mixing equipment for bovine fiber batching and mixing, a bovine fiber web laying machine for laying the proportioned and mixed bovine fibers on the super-high physical property leather substrate, and a hydroentangling equipment group for carrying out hydroentangling treatment on the super-high physical property leather substrate and the bovine fibers after web laying; The fiber redirected nonwoven fiber web layer forming equipment group includes, arranged in sequence, a nonwoven fiber proportioning and mixing equipment for proportioning and mixing nonwoven fibers, a carding machine for carding the proportioned and mixed nonwoven fiber raw materials into a thin fiber web, a Z-shaped reciprocating web laying machine for forming a thick fiber web by Z-shaped alternating reciprocating web laying and laminating of the carded thin fiber web, and a thick fiber web fiber redirecting equipment for redirecting the upper part of the fibers and the lower part of the fibers of the thick fiber web longitudinally to form the fiber redirected nonwoven fiber web layer; The Z-shaped reciprocating web laying machine is respectively provided with a thin fiber web input channel for docking the carding machine and a thick fiber web output channel for docking the fiber redirecting equipment, and the thin fiber web input channel and the thick fiber web output channel are perpendicular to each other, and the reciprocating direction of the Z-shaped reciprocating web laying is arranged transversely with respect to the thick fiber web output channel; The thick fiber web fiber redirecting equipment includes a plurality of groups of annular saw blade redirecting rollers rotatably arranged, and each group of annular saw blade redirecting rollers includes a front annular saw blade redirecting roller, a middle annular saw blade redirecting roller and a rear annular saw blade redirecting roller arranged in sequence according to the forward conveying direction of the thick fiber web, and the front annular saw blade redirecting roller and the rear annular saw blade redirecting roller are in contact with the lower surface of the thick fiber web, and the middle annular saw blade redirecting roller is in contact with the upper surface of the thick fiber web; wherein, the rotation direction of the front annular saw blade redirecting roller points forward in the tangential direction at the contact part with the thick fiber web, and the rotation directions of the front annular saw blade redirecting roller and the middle annular saw blade redirecting roller point backward in the tangential direction at the contact part with the thick fiber web, so as to form the fiber redirecting operation of the thick fiber web.

2. The leather base fabric production line based on a super-high physical property leather substrate according to claim 1, wherein, The needling equipment group includes a first needling straight needling machine, a second needling straight needling machine and a third needling straight needling machine arranged in sequence.

3. A leather base fabric production line based on a super-high physical property leather substrate according to claim 1, characterized in that, The bovine fiber proportioning and mixing equipment is connected to the bovine fiber web former. A second web stacking area is provided on the bovine fiber web former, and the ultra-high physical property leather substrate output from the needling equipment group is connected to the second web stacking area.

4. A leather base fabric production line based on a super-high physical property leather substrate according to claim 3, characterized in that, The hydroentangling equipment group includes a first hydroentangling machine, a second hydroentangling machine, and a third hydroentangling machine arranged in sequence according to the hydroentangling process; the post-treatment equipment group further includes a squeezing water absorber, a dryer, a trimming machine, and a winding machine which are arranged after the hydroentangling equipment group and are used for sequentially dewatering, drying, trimming, and winding the leather base cloth after hydroentangling.

5. A leather base fabric production line based on a super-high physical property leather substrate according to claim 3, characterized in that, A wet bovine leather fiber transfer web that moves circularly along the circumference is provided above the second web stacking area of the bovine fiber web former. A substrate supporting web is provided below the second web stacking area of the bovine fiber web former. The ultra-high physical property leather substrate output from the needling equipment group enters the position between the lower part of the wet bovine leather fiber transfer web and the upper part of the substrate supporting web in the second web stacking area. The wet bovine leather fiber web formed on the wet bovine leather fiber transfer web is transferred and laminated onto the ultra-high physical property leather substrate through the circumferential movement of the wet bovine leather fiber transfer web. A bovine leather fiber aqueous slurry discharge port is provided above the wet bovine leather fiber transfer web, and the size of the discharge port can be adjusted; a number of vacuum water absorbers are arranged at intervals on the inner side of the upper part of the wet bovine leather fiber transfer web.

6. The leather base fabric production line based on a super-high physical property leather substrate according to claim 5, characterized in that, The hydroentangling equipment group further includes a double wire hydroentangling machine arranged on the second web stacking area. The double wire hydroentangling machine is used to perform hydroentangling operations on the ultra-high physical property leather substrate laminated with the bovine leather fiber web after the wet bovine leather fiber web is transferred and laminated onto the ultra-high physical property leather substrate, with the wet bovine leather fiber transfer web and the substrate supporting web clamped up and down.

7. A leather base fabric production line based on a super-high physical property leather substrate according to claim 1, characterized in that, The leather base cloth preparation process includes the following steps: (1) Production of the ultra-high physical property leather substrate: Use the pre-treatment equipment group to produce the ultra-high physical property leather substrate. (2) Bovine leather fiber web laying: Use the bovine leather fiber web former to discharge the bovine leather fiber aqueous slurry onto the wet bovine leather fiber transfer web to form a bovine leather fiber web and transfer and laminate it onto the ultra-high physical property leather substrate located in the second web stacking area. (3) Double wire hydroentangling: Use the double wire hydroentangling machine arranged in the second web stacking area to perform double wire hydroentangling on the laminate of the ultra-high physical property leather substrate laminated with the bovine leather fiber web to improve the strength and flatness of the leather substrate after subsequent hydroentangling. (4) Three-stage hydroentangling: Use the first hydroentangling machine, the second hydroentangling machine, and the third hydroentangling machine to sequentially perform pre-hydroentangling, medium-hydroentangling, and final-hydroentangling on the laminate of the ultra-high physical property leather substrate laminated with the bovine leather fiber web to form the leather base cloth of the ultra-high physical property leather substrate. (5) Pressing dry, ironing, and drying: (6) Trimming and winding.

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