A water-based microfiber leather production process and water-based microfiber leather

Abstract

This invention discloses a water-based microfiber leather production process and water-based microfiber leather, belonging to the field of synthetic leather production technology. The production process uses a microfiber leather impregnation device to simultaneously impregnate multiple fabrics. The microfiber leather impregnation device includes an outer impregnation roll assembly, a first inner impregnation core assembly, and a second inner impregnation core assembly. The outer impregnation roll assembly includes several corner frame assemblies and belt impregnation assemblies arranged within the two corner frame assemblies. Each belt impregnation assembly assembly can impregnate one fabric. The water-based slurry is driven by the first and second inner impregnation core assemblies and passes through each fabric, thereby achieving impregnation of multiple fabrics while allowing the water-based slurry to pass through each fabric, improving the impregnation effect. The corner frame assemblies of the outer impregnation roll assembly have a hollow internal structure that connects the various impregnation assemblies, allowing the water-based slurry between the various impregnation assemblies to communicate, resulting in more uniform impregnation of the water-based slurry between the various fabrics.

Description

Technical Field

[0001] This invention relates to the field of synthetic leather production technology, specifically to a water-based microfiber leather production process and water-based microfiber leather. Background Technology

[0002] Water-based microfiber leather is a high-simulation leather product formed by coating a PU coating onto a base fabric composed of microfibers. During the base fabric production, a polyurethane impregnation process is required. Currently, the impregnation process for fabrics can either only impregnate a single sheet of fabric or simultaneously impregnate multiple sheets arranged in parallel. For example, Patent Document 1 (CN120311424B) discloses an impregnation and finishing device for sportswear fabrics. This device uses a circular slip ring to change the direction of the impregnated fabric and also incorporates multiple stacked rollers (first and second rollers) to impregnate multiple sheets of fabric simultaneously. However, due to the small spacing between parallel fabrics during impregnation, the impregnation process... When impregnating fabrics, the liquid can only pass through the gaps between the fabrics, resulting in a less than ideal impregnation effect. For example, Patent Document 2 (CN119372859B) discloses an impregnation device for synthetic leather production and an ultra-thin soft mesh synthetic leather. This device achieves better impregnation by having the impregnation liquid alternately pass through the fabric from top to bottom and then from bottom to top. However, this device can only process a single piece of fabric. While the impregnation effect is better, its efficiency is not high, as it cannot impregnate multiple fabrics simultaneously. The impregnation efficiency needs further improvement. Furthermore, it cannot stretch the fabric, and it cannot effectively stretch the fabric after wrinkles have formed.

[0003] In summary, existing technologies for water-based microfiber leather often only allow for the full impregnation of a single fabric, or involve arranging the fabrics in parallel for polyurethane impregnation. No process exists that can simultaneously impregnate multiple fabrics while improving the impregnation effect. Therefore, this invention provides a water-based microfiber leather production process and water-based microfiber leather that allows for the simultaneous impregnation of multiple fabrics, enables the water-based slurry to pass through each fabric, and allows for the stretching of the fabrics during impregnation. Furthermore, the amount of water-based slurry used across multiple fabrics can be coordinated and adjusted, resulting in a fully impregnated water-based microfiber leather. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a process for producing water-based microfiber leather, which includes the following steps:

[0005] I. Preparation of water-based slurry:

[0006] 100 parts of waterborne polyurethane emulsion and 5 parts of thickener were mixed to obtain a waterborne slurry;

[0007] II. Impregnation:

[0008] The aqueous slurry obtained in step one is added to a microfiber leather impregnation device. The microfiber leather impregnation device includes an impregnation base and a multi-fabric impregnation assembly. The multi-fabric impregnation assembly includes a fabric winding assembly and several fabric roll groups. The fabric winding assembly includes an outer impregnation roll group, an outer sealing cover plate group, a first inner impregnation core group, and a second inner impregnation core group. The first and second inner impregnation core groups are arranged side-by-side within the outer impregnation roll group. The outer sealing cover plate group is disposed on the outer surface of the outer impregnation roll group. The outer impregnation roll group includes several corner frame groups. The document describes a fabric roll assembly and a belt impregnation assembly disposed between corner frame assemblies. The belt impregnation assembly includes a first belt impregnation assembly and a second belt impregnation assembly arranged side-by-side. The fabric roll is inserted between the outer impregnation roll assembly and the first inner impregnation core assembly, and between the outer impregnation roll assembly and the second inner impregnation core assembly. Both the first and second inner impregnation core assemblies include an outer support frame, an inner telescopic frame, a first side plate, and a second side plate. The inner telescopic frame is located within the outer support frame, and the first and second side plates are fixedly disposed within the outer support frame. On both sides, the space enclosed by the outer support frame, inner telescopic frame, first side plate, and second side plate of the first impregnating core assembly is defined as the second inner cavity; the space inside the first belt impregnation assembly is defined as the third inner cavity; the space inside the second belt impregnation assembly is defined as the sixth inner cavity; and the space enclosed by the outer support frame, inner telescopic frame, first side plate, and second side plate of the second impregnating core assembly is defined as the fifth inner cavity. During impregnation, the inner telescopic frames of the first and second impregnating core assemblies expand and contract asynchronously. When the first impregnating core assembly expands from its minimum to its maximum size, the fifth inner cavity is defined as the sixth inner cavity. The two impregnation core groups retract from their maximum to minimum size. The aqueous slurry passes through the fabric roll group from the second inner cavity and enters the third and sixth inner cavities. Then, it flows through the fabric roll group and into the fifth inner cavity. After the second impregnation core group retracts to its minimum size, it expands to its maximum size. The first impregnation core group retracts from its maximum size to its minimum size. At this time, the aqueous slurry passes through the fabric roll group from the fifth inner cavity and enters the sixth and third inner cavities. Then, it flows back to the second inner cavity after passing through the fabric roll group. The aqueous slurry completes one cycle of flow. During impregnation, the fabric roll group completes several cycles of flow with the aqueous slurry.

[0009] III. Post-alkali reduction treatment:

[0010] The impregnated fabric rolls are dried to obtain impregnated base fabric; the impregnated base fabric is subjected to alkali reduction treatment in a 5-15% sodium hydroxide aqueous solution, the alkali-reduced base fabric is washed with water until neutral, and then dried to obtain water-based microfiber leather.

[0011] Preferably, the thickener is a polyurethane thickener; the drying temperature of the base fabric after washing to neutral is 100-130℃, the alkali reduction temperature is 75-95℃, and the alkali reduction time is 40-100min.

[0012] Preferably, the fabric roll group includes n fabric rolls, where n is a natural number greater than or equal to 3, and the microfiber leather impregnation equipment can impregnate n fabric rolls simultaneously.

[0013] Preferably, both the first belt impregnation assembly and the second belt impregnation assembly include a first belt guide roller, a second belt guide roller, and an impregnated belt. The impregnated belt is an annular belt. The first belt guide roller and the second belt guide roller pass through the interior of the impregnated belt and tighten it. The impregnated belt rotates due to the rotation of the first belt guide roller and / or the second belt guide roller. The impregnated belt includes a belt body with a plurality of impregnation hole groups on the belt body. The impregnation holes in the impregnation hole groups are arranged alternately along the axial direction of the first belt guide roller or the second belt guide roller and along the direction of the line connecting the first belt guide roller and the second belt guide roller.

[0014] Preferably, the corner frame assembly consists of two corner frames. Each corner frame includes a corner frame body, a first support rod, and a second support rod. The corner frame body includes an upper support plate, a lower support plate, a first connecting cylinder, a second connecting cylinder, an upper connecting column, and a lower connecting column. The first connecting cylinder is located at one end of the upper and lower support plates, and the second connecting cylinder is located at the other end of the upper and lower support plates. The lower connecting column is located in the middle of the lower support plate near the first connecting cylinder, and the upper connecting column is located in the middle of the upper support plate near the second connecting cylinder. The first and second support rods are located at the upper end of the upper support plate. The corner frame body includes a front straight surface and a rear inclined surface. The rear inclined surfaces of the two corner frames fit together to form the corner frame assembly. The included angle between the front straight surfaces of the two corner frames is α, then α = 180° - (n-2) * 180° / n = 360° / n.

[0015] Preferably, a first rotating hole is provided in the first connecting cylinder, a second rotating hole is provided in the second connecting cylinder, a third rotating hole is provided in the lower connecting column, and a fourth rotating hole is provided in the upper connecting column. The two ends of the first belt guide roller of the first belt impregnation assembly are rotatably connected to the first rotating hole and the second rotating hole, respectively. The two ends of the second belt guide roller of the first belt impregnation assembly are rotatably connected to the third rotating hole and the fourth rotating hole, respectively. The two ends of the first belt guide roller of the second belt impregnation assembly are rotatably connected to the fourth rotating hole and the third rotating hole, respectively. The two ends of the second belt guide roller of the second belt impregnation assembly are rotatably connected to the second rotating hole and the first rotating hole, respectively.

[0016] Preferably, the outer support frame includes corner column groups, a front support frame group, a rear support frame group, and a second side plate. A plurality of corner column groups are arranged between the front support frame group and the rear support frame group. The first side plate is arranged outside the front support frame group, and the second side plate is arranged outside the rear support frame group. The inner telescopic frame includes corner bracket groups and telescopic plates. The telescopic plates are arranged between adjacent corner bracket groups. The two ends of the corner bracket groups and the telescopic plates are respectively attached to the inner sides of the first side plate and the second side plate. A telescopic drive assembly is arranged between the outer support frame and the inner telescopic frame.

[0017] Preferably, the impregnation base includes a base frame and two side supports, which are disposed on the base frame. The microfiber leather impregnation device further includes a first support shaft and a second support shaft. One end of the first support shaft is connected to the first side plate of the first inner impregnation core assembly, and the other end of the first support shaft is provided with a first cover plate. One end of the second support shaft is connected to the second side plate of the second inner impregnation core assembly, and the other end of the second support shaft is provided with a second cover plate. A first inner hole is opened on the first side plate, and a second inner hole is opened on the second side plate. An opening and closing valve one is disposed in the first inner hole, and an opening and closing valve two is disposed in the second inner hole. A suction pump is also disposed in the base frame. The suction pump is connected to the first cover plate and the second cover plate through a pipeline. The first cover plate and the second cover plate are provided with pipeline interfaces for the pipeline to pass through.

[0018] Preferably, the external impregnation roll assembly further includes a first extension frame assembly and a second extension frame assembly. The first extension frame assembly is disposed on one side of the corner frame assembly, and the second extension frame assembly is disposed on the other side of the corner frame assembly. A first reversing roller assembly is disposed between the first extension frame assemblies, and a second reversing roller assembly is disposed between the second extension frame assemblies. The fabric roll assembly includes several fabric rolls. Each fabric roll includes a take-up roll, an unwind roll, and fabric disposed therebetween. After the fabric is unwound from the unwind roll, it passes through the first reversing roller assembly, then through the first belt impregnation assembly and the second belt impregnation assembly, and then around the second reversing roller assembly before being wound up by the take-up roll.

[0019] Preferably, it also includes a water-based microfiber leather, which is made by the water-based microfiber leather production process.

[0020] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] 1. The water-based microfiber leather production process of the present invention uses a microfiber leather impregnation device to simultaneously impregnate multiple fabrics. The microfiber leather impregnation device includes an outer impregnation roll assembly, a first inner impregnation core assembly, and a second inner impregnation core assembly. The outer impregnation roll assembly includes several corner frame assemblies and belt impregnation assemblies arranged within the two corner frame assemblies. Each belt impregnation assembly assembly can impregnate one fabric. The first and second inner impregnation core assemblies are located within the outer impregnation roll assembly. The fabric passes between the first inner impregnation core assembly and the outer impregnation roll assembly, and between the second inner impregnation core assembly and the outer impregnation roll assembly. The water-based slurry can be driven by the first and second inner impregnation core assemblies to pass through each fabric, thereby achieving the simultaneous impregnation of multiple fabrics and allowing the water-based slurry to pass through each fabric, resulting in a better impregnation effect.

[0022] 2. The corner frame assembly of the outer impregnation roll assembly of the present invention has a hollow internal structure, which is composed of two corner frames. In addition to providing support for the belt impregnation assembly, the corner frame assembly can also connect each impregnation assembly, so that the water-based slurry between each impregnation assembly can be connected, thereby enabling the water-based slurry of each fabric to reach a connected state, making the impregnation of the water-based slurry between each fabric more uniform. The first inner impregnation core assembly and the second inner impregnation core assembly both include an inner telescopic frame that can expand and shrink. Through the asynchronous expansion and shrinkage of the two inner telescopic frames, the water-based slurry can be driven to reciprocate from the first inner impregnation core assembly through the fabric to the first belt impregnation assembly, then through the second belt impregnation assembly through the fabric to the second inner impregnation core assembly, then through the second inner impregnation core assembly through the fabric to the second belt impregnation assembly, and then through the first belt impregnation assembly through the fabric to the first inner impregnation core assembly. The water-based slurry flows back and forth in this way, thereby improving the impregnation effect of the fabric.

[0023] 3. The first belt impregnation assembly and the second belt impregnation assembly of the present invention include an impregnation belt one with a plurality of impregnation hole groups on the belt body. The impregnation holes included in the impregnation hole group are arranged at intervals in both the movement direction of the impregnation belt one and the width direction perpendicular to the movement direction, so that the impregnation holes are arranged in an alternating manner. With this arrangement, by adjusting the position of the first belt impregnation assembly and the second belt impregnation assembly in contact with the fabric to be a distance of one impregnation hole, the impregnation belt one can impregnate the entire fabric without the situation where the fabric cannot be impregnated due to the obstruction of the belt body.

[0024] 4. In this invention, multiple fabric rolls are arranged around the outer periphery of the fabric winding assembly. The multiple fabric rolls are evenly arranged around the fabric winding assembly. The fabric winding assembly is rotatably mounted on the impregnation base. By adjusting the rotation angle of the fabric winding assembly, different fabric rolls can be positioned at different locations. During the impregnation operation, the fabric winding assembly can also be kept in a low-speed rotation state. In this way, the impregnation liquid can be distributed more evenly in various positions of the fabric, avoiding the situation where the fabric rolls are stationary and accumulate more water-based slurry in some positions and less water-based slurry in others due to gravity. Moreover, the rotating fabric winding assembly can also promote the flow of water-based slurry on the fabric. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the microfiber leather impregnation equipment of this application;

[0026] Figure 2 Schematic diagram of the microfiber leather impregnation equipment of this application. Figure 1 ;

[0027] Figure 3 Schematic diagram of the microfiber leather impregnation equipment of this application. Figure 2 ;

[0028] Figure 4 Image (a) is a front view of the microfiber leather impregnation equipment with the impregnation cover removed. Figure 4 (b) in the middle is Figure 4 Sectional view AA in (a) Figure 4 (c) is a schematic diagram of the microfiber leather impregnation equipment for removing the impregnation cover. Figure 4 (d) is a top view of the microfiber leather impregnation equipment with the impregnation cover removed;

[0029] Figure 5 (a) in the diagram is a schematic of the fabric winding assembly structure. Figure 1 , Figure 5 (b) in the diagram is a schematic of the fabric winding assembly structure. Figure 2 , Figure 5 (c) in the image is a front view of the fabric winding assembly. Figure 5 (d) in the figure is a side view of the fabric winding assembly;

[0030] Figure 6 Schematic diagram of fabric winding assembly explosion Figure 1 ;

[0031] Figure 7 Schematic diagram of fabric winding assembly explosion Figure 2 ;

[0032] Figure 8 (a) is a side view of the external impregnation roll assembly. Figure 8(b) is a front view of the external impregnation roll assembly. Figure 8 (c) is a schematic diagram of the external impregnation drum assembly structure;

[0033] Figure 9 This is a schematic diagram of an explosion of an external impregnation drum assembly;

[0034] Figure 10 This is a schematic diagram of the explosion of the second inner impregnated core group;

[0035] Figure 11 This is a schematic diagram of the explosion of the first inner core assembly;

[0036] Figure 12 (a) in the image is the front view of the corner frame component. Figure 12 (b) is a schematic diagram of the corner frame component structure. Figure 12 (c) in the figure is the side view of the corner frame component.

[0037] Figure 13 This is an exploded view of the corner frame component;

[0038] Figure 14 This is a schematic diagram of the external support frame structure of the second embodiment;

[0039] Figure 15 for Figure 14 An explosion diagram;

[0040] Figure 16 Schematic diagram of the explosion of the left or right smoothing zone group;

[0041] Figure 17 (a) is an exploded schematic diagram of the first belt impregnation assembly or the second belt impregnation assembly; Figure 17 (b) in the figure is a front view of the belt body; Figure 17 (c) in the middle is Figure 17 BB section view of (b) in the figure; Figure 17 (d) in the figure is a bottom view of the belt body.

[0042] The components include: 1. Microfiber leather impregnation equipment; 2. Impregnation base; 3. Impregnation top cover; 4. Multi-fabric impregnation assembly; 5. First support shaft; 6. Second support shaft; 7. Fabric winding assembly; 8. Fabric roll group; 9. Fabric roll one; 10. Fabric roll two; 11. Fabric roll three; 12. Fabric roll four; 13. Fabric roll five; 14. Fabric roll six; 15. Outer impregnation roll group; 16. First inner impregnation core group; 17. Second inner impregnation core group; 18. First reversing roller group; 19. Second reversing roller group; 20. Outer sealing cover plate group; 21. Corner frame assembly; 22. ... 23. First corner frame assembly; 24. Second corner frame assembly; 25. Third corner frame assembly; 26. Fifth corner frame assembly; 27. Sixth corner frame assembly; 28. Belt impregnation assembly; 29. ​​First belt impregnation assembly; 20. Second belt impregnation assembly; 31. First extension frame assembly; 32. Second extension frame assembly; 33. First belt guide roller; 34. Second belt guide roller; 35. Impregnated belt; 36. Fourth corner frame assembly; 37. Receiving groove; 38. Outer support frame; 39. Inner telescopic frame; 40. First side plate; 41. Second side plate; 42. First inner hole; 43. ... 43. Unwinding drum; 44. Rewinding drum; 45. Fabric; 46. Telescopic drive assembly; 47. First inner cavity; 48. Second inner cavity; 49. Third inner cavity; 50. Fourth inner cavity; 51. Fifth inner cavity; 52. Sixth inner cavity; 53. Corner support assembly; 54. Telescopic plate; 55. Belt body; 56. Impregnation hole assembly; 57. Lateral smoothing belt assembly; 58. Corner upright assembly; 59. Front support frame assembly; 60. Rear support frame assembly; 61. Left smoothing belt assembly; 62. Right smoothing belt assembly; 63. Front support plate; 64. Rear support plate; 65. First drive roller 66. Second drive roller; 67. Transverse flat belt; 68. Corner frame body; 69. First support rod; 70. Second support rod; 71. Upper support plate; 72. Lower support plate; 73. First connecting cylinder; 74. Second connecting cylinder; 75. Front straight surface; 76. Rear inclined surface; 77. Upper connecting column; 78. Lower connecting column; 79. First rotating hole; 80. Second rotating hole; 81. Third rotating hole; 82. Fourth rotating hole; 83. Bottom frame; 84. Side support; 85. Opening; 86. Closing door; 87. First cover plate; 88. Second cover plate; 89. Impregnation hole. Detailed Implementation

[0043] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] Example 1

[0045] A water-based microfiber leather production process includes:

[0046] IV. Preparation of Water-Based Slurry:

[0047] Mix 100 parts of waterborne polyurethane emulsion and 1-10 parts of thickener to obtain a waterborne slurry;

[0048] V. Impregnation:

[0049] The aqueous slurry obtained in step one is added to the microfiber leather impregnation device 1. The microfiber leather impregnation device 1 includes an impregnation base 2 and a multi-fabric impregnation assembly 4. The multi-fabric impregnation assembly 4 includes a fabric winding assembly 7 and several fabric roll groups 8. The fabric winding assembly 7 includes an outer impregnation roll group 15, an outer sealing cover plate group 20, a first inner impregnation core group 16, and a second inner impregnation core group 17. The first inner impregnation core group 16 and the second inner impregnation core group 17 are arranged side by side inside the outer impregnation roll group 15. The outer sealing cover plate group 20 is disposed on the outer surface of the outer impregnation roll group 15. The outer impregnation roll group 15 includes several corner frame assemblies 21 and belt impregnation groups disposed between the corner frame assemblies 21. Component 27, the belt impregnation assembly 27 includes a first belt impregnation assembly 28 and a second belt impregnation assembly 29 arranged side by side. The fabric roll 8 is inserted between the outer impregnation roll assembly 15 and the first inner impregnation core assembly 16, and between the outer impregnation roll assembly 15 and the second inner impregnation core assembly 17. The first inner impregnation core assembly 16 and the second inner impregnation core assembly 17 have the same structure, both including an outer support frame 37, an inner telescopic frame 38, a first side plate 39, and a second side plate 40. The inner telescopic frame 38 is located inside the outer support frame 37. The first side plate 39 and the second side plate 40 are fixedly disposed on both sides of the outer support frame 37, defining the outer support frame 37 of the first inner impregnation core assembly 16. The space enclosed by the inner telescopic frame 38, the first side plate 39, and the second side plate 40 is the second inner cavity 48. The space inside the first belt impregnation assembly 28 is the third inner cavity 49. The space inside the second belt impregnation assembly 29 is the sixth inner cavity 52. ​​The space enclosed by the outer support frame 37, the inner telescopic frame 38, the first side plate 39, and the second side plate 40 of the second inner impregnation core assembly 17 is defined as the fifth inner cavity 51. During impregnation, the inner telescopic frames of the first inner impregnation core assembly 16 and the second inner telescopic frames of the second inner impregnation core assembly 17 extend and retract asynchronously. That is, when the inner telescopic frame of the first inner impregnation core assembly 16 retracts to its minimum, the inner telescopic frame of the second inner impregnation core assembly 17 expands to its maximum. When the inner telescopic frame of 6 expands to its maximum, the inner telescopic frame of the second inner impregnation core group 17 retracts to its minimum. When the first inner impregnation core group 16 expands from its minimum to its maximum, the second inner impregnation core group 17 retracts from its maximum to its minimum. The aqueous slurry passes through the fabric roll group 8 from the second inner cavity 48 and enters the third inner cavity 49 and the sixth inner cavity 52. ​​Then it passes through the fabric roll group 8 and flows into the fifth inner cavity 51. After the second inner impregnation core group 17 retracts to its minimum, it expands to its maximum again. The first inner impregnation core group 16 retracts from its maximum to its minimum. At this time, the aqueous slurry passes through the fabric roll group 8 from the fifth inner cavity 51 and enters the sixth inner cavity 52 and the third inner cavity 49. Then it passes through the fabric roll group 8 and flows into the second inner cavity 48. This process repeats.

[0050] VI. Post-alkali reduction treatment:

[0051] The impregnated fabric roll 8 is dried to obtain the impregnated base fabric; the impregnated base fabric is subjected to alkali reduction treatment in a 5-15% sodium hydroxide aqueous solution, the alkali-reduced base fabric is washed with water until neutral, and then dried to obtain water-based microfiber leather.

[0052] Preferably, the thickener is a polyurethane thickener, such as a hydrophobically modified ethoxylated polyurethane (HEUR).

[0053] Preferably, the drying temperature of the base fabric after washing to neutral is 100-130℃, the alkali reduction temperature is 75-95℃, and the alkali reduction time is 40-100min.

[0054] like Figures 1-13 , Figure 17 As shown, further, the number of fabric rolls included in the fabric roll group 8 is the same as the number of the belt impregnation components 27 and the number of the outer sealing cover plates included in the outer sealing cover plate group 20. For example, the fabric roll group 8 may include n fabric rolls, where n is a natural number greater than or equal to 3. The microfiber leather impregnation device 1 can simultaneously perform impregnation operations on n fabric rolls. Preferably, n is selected as 6. For ease of explanation, this embodiment uses 6 fabric rolls as an example for illustration.

[0055] The first belt impregnation assembly 28 and the second belt impregnation assembly 29 have the same structure, such as Figure 17 The diagram shows a first belt guide roller 32, a second belt guide roller 33, and an impregnated belt 34. The impregnated belt 34 is an annular belt. The first belt guide roller 32 and the second belt guide roller 33 pass through the interior of the impregnated belt 34 and tighten it. The rotation of the first belt guide roller 32 and / or the second belt guide roller 33 drives the impregnated belt 34 to rotate. The impregnated belt 34 includes a belt body 55, on which a plurality of impregnation hole groups 56 are formed. The impregnation holes 89 of the impregnation hole groups 56 follow the first belt guide roller 32 or the second belt guide roller 33. The guide rollers 33 are arranged alternately along their axial direction and along the line connecting the first belt guide roller 32 and the second belt guide roller 33. This arrangement ensures that every corner of the fabric is adequately impregnated after passing through the first belt impregnation assembly 28 and the second belt impregnation assembly 29. This only requires a certain angle between the impregnation belts of the first belt impregnation assembly 28 and the second belt impregnation assembly 29. Ideally, the impregnation holes 89 in the impregnation hole group 56 of the first belt impregnation assembly 28 or the second belt impregnation assembly 29 should be positioned such that they are close to the fabric side. Figure 7 As shown in (c), the impregnation holes 89 in the impregnation hole group 56 of the impregnation belt of the second belt impregnation assembly 29 or the first belt impregnation assembly 28 near the fabric side are as follows: Figure 7 The arrangement shown in (d) is as follows.

[0056] Corner frame component 21, such as Figures 12-13 As shown, the assembly consists of two corner frames. Each corner frame includes a corner frame body 68, a first support rod 69, and a second support rod 70. The corner frame body 68 includes an upper support plate 71, a lower support plate 72, a first connecting cylinder 73, a second connecting cylinder 74, an upper connecting column 77, and a lower connecting column 78. The first connecting cylinder 73 is located at one end of the upper support plate 71 and the lower support plate 72, and the second connecting cylinder 74 is located at the other end. The lower connecting column 78 is located in the middle of the lower support plate 72 near the first connecting cylinder 73, and the upper connecting column 77 is located in the middle of the upper support plate 71 near the second connecting cylinder 74. The first support rod 69 and the second support rod 70 are located at the upper end of the upper support plate 71. The corner frame body 68 includes a front straight surface 75 and a rear inclined surface 76. The rear inclined surfaces 76 of the two corner frames fit together to form the corner frame assembly 21. Figure 12 As shown in (a), the included angle of the front straight face 75 of the two corner frames is α, then α = 180° - (n-2) * 180° / n = 360° / n.

[0057] The first connecting cylinder 73 has a first rotating hole 79, the second connecting cylinder 74 has a second rotating hole 80, the lower connecting column 78 has a third rotating hole 81, and the upper connecting column 77 has a fourth rotating hole 82. The two ends of the first belt guide roller 32 of the first belt impregnation assembly 28 are rotatably connected to the first rotating hole 79 and the second rotating hole 80, respectively. The two ends of the second belt guide roller 33 of the first belt impregnation assembly 28 are rotatably connected to the third rotating hole 81 and the fourth rotating hole 82, respectively. The two ends of the first belt guide roller 32 of the second belt impregnation assembly 29 are rotatably connected to the fourth rotating hole 82 and the third rotating hole 81, respectively. The two ends of the second belt guide roller 33 of the second belt impregnation assembly 29 are rotatably connected to the second rotating hole 80 and the first rotating hole 79, respectively.

[0058] like Figures 10-11 As shown, the outer support frame 37 includes corner column groups 58, a front support frame group 59, a rear support frame group 60, a first side plate 39, and a second side plate 40. A plurality of corner column groups 58 are arranged between the front support frame group 59 and the rear support frame group 60. The first side plate 39 is arranged outside the front support frame group 59, and the second side plate 40 is arranged outside the rear support frame group 60. The inner telescopic frame 38 includes corner bracket groups 53 and telescopic plates 54. The telescopic plates 54 are arranged between adjacent corner bracket groups 53. The two ends of the corner bracket groups 53 and the telescopic plates 54 are respectively attached to the inner sides of the first side plate 39 and the second side plate 40.

[0059] A telescopic drive assembly 46 is provided between the outer support frame 37 and the inner telescopic frame 38. The telescopic drive assembly 46 may be a telescopic cylinder, a telescopic hydraulic cylinder, or a telescopic lead screw. When it is a telescopic cylinder or a telescopic hydraulic cylinder, the piston rod may be located outside the corner bracket group 53, and the sleeve may be located inside the corner column group 58. The piston rod is slidably located inside the sleeve to perform telescopic movement.

[0060] Preferably, such as Figure 2 As shown, the impregnation base 2 includes a base frame 83 and two side supports 84, which are disposed on the base frame 83. The microfiber leather impregnation device 1 also includes a first support shaft 5 and a second support shaft 6. One end of the first support shaft 5 is connected to the first side plate 39 of the first inner impregnation core assembly 16, and the other end of the first support shaft 5 is provided with a first cover plate 87. One end of the second support shaft 6 is connected to the second side plate 40 of the second inner impregnation core assembly 17, and the other end of the second support shaft 6 is provided with a second cover plate 88. Figure 11 As shown, a first inner hole 41 is provided on the first side plate 39, and a second inner hole 42 is provided on the second side plate 40. An opening / closing valve (not shown in the figure) is installed in the first inner hole 41, and an opening / closing valve (not shown in the figure) is installed in the second inner hole 42. A suction pump is also provided inside the bottom frame 83. The suction pump is connected to the first cover plate 87 and the second cover plate 88 via pipelines. Pipeline interfaces (not shown in the figure) are provided on the first cover plate 87 and the second cover plate 88 for the pipeline to pass through. The pipeline is connected to the center of the first cover plate 87 and the second cover plate 88 by a rotating seal, allowing for flexible rotation and liquid supply. The space enclosed by the inner telescopic frame 38 of the first inner core assembly 16, the first side plate 39, and the second side plate 40 is defined as the first inner cavity 47. The space enclosed by the inner telescopic frame 38 of the second inner core assembly 17, the first side plate 39, and the second side plate 40 is defined as the fourth inner cavity 50.

[0061] Preferably, in order to better guide the fabric, the outer impregnation roll assembly 15 further includes a first extension frame assembly 30 and a second extension frame assembly 31. The first extension frame assembly 30 is disposed on one side of the corner frame assembly 21, and the second extension frame assembly 31 is disposed on the other side of the corner frame assembly 21. A first reversing roller assembly 18 is disposed between the first extension frame assemblies 30, and a second reversing roller assembly 19 is disposed between the second extension frame assemblies 31. The fabric roll assembly 8 includes a plurality of fabric rolls, the fabric rolls being as follows: Figure 2As shown, it includes a take-up drum 44, an unwind drum 43, and a fabric 45 disposed therebetween. After the fabric 45 is released from the unwind drum 43, it passes through the first reversing roller group 18, then through the first belt impregnation assembly 28 and the second belt impregnation assembly 29, and then passes around the second reversing roller group 19 before being wound up by the take-up drum 44.

[0062] Preferably, such as Figure 3 As shown, the fabric roll group 8 includes six fabric rolls, namely fabric roll one 9, fabric roll two 10, fabric roll three 11, fabric roll four 12, fabric roll five 13 and fabric roll six 14. Correspondingly, the corner frame assembly 21 includes six corner frame groups, namely first corner frame group 22, second corner frame group 23, third corner frame group 24, fourth corner frame group 35, fifth corner frame group 25 and sixth corner frame group 26. The corner support group 53 includes six corner brackets, and the corner column group 58 also includes six corner support columns. The first side plate 39 and the second side plate 40 are regular hexagons.

[0063] Preferably, the corner bracket assembly 53 includes two receiving grooves 36, and the telescopic plate 54 is inserted into the receiving grooves 36.

[0064] Preferably, such as Figure 6 As shown, the outer sealing cover assembly 20 includes six outer sealing covers, which are disposed between the two corner frame assemblies 21.

[0065] Preferably, the two ends of the unwinding drum 43 are rotatably disposed between the first support rod 69 and the second support rod 70, and the two ends of the winding drum 44 are rotatably disposed between the second support rod 70 and the first support rod 69.

[0066] Preferably, it also includes an impregnation cover 3, which is movably mounted on the impregnation base 2. The impregnation cover 3 has openings 85 on the top, front and rear sides, and a closing door 86 is provided at the openings 85.

[0067] Example 2

[0068] like Figures 14 to 16 As shown, in order to allow the impregnated fabric to stretch out and improve the impregnation effect, both the front support frame group 59 and the rear support frame group 60 are provided with transverse smoothing belt groups 57. The transverse smoothing belt groups 57 include a left smoothing belt group 61 and a right smoothing belt group 62. The left smoothing belt group 61 and the right smoothing belt group 62 can smooth and remove wrinkles from the fabric when it passes through.

[0069] Specifically, the left smoothing belt group 61 and the right smoothing belt group 62 have the same structure, each including a front support plate 63, a rear support plate 64, a first drive roller 65, a second drive roller 66, and a transverse flat belt 67. The first drive roller 65 is rotatably disposed at one end of the front support plate 63 and the rear support plate 64, and the second drive roller 66 is rotatably disposed at the other end of the front support plate 63 and the rear support plate 64. The transverse flat belt 67 is disposed outside the first drive roller 65 and the second drive roller 66, and the transverse flat belt 67 is tensioned by the first drive roller 65 and the second drive roller 66, and the transverse flat belt 67 is driven to rotate by the first drive roller 65 and / or the second drive roller 66.

[0070] Example 3

[0071] It also includes a water-based microfiber leather, which is made by the water-based microfiber leather production process.

[0072] To facilitate understanding of the microfiber leather impregnation device 1 of this application by those skilled in the art, the following description is provided in conjunction with Embodiments 1 and 2: When impregnation of fabric 45 is required, multiple fabric rolls (6 in Embodiment 1, but 8 or more may also be used) are arranged on the outer impregnation roll assembly 15. Specifically, the take-up roll 44 and the unwind roll 43 are arranged between the second support rod 70 and the first support rod 69. Then, fabric 45 is pulled out from the unwind roll 43, passes through the first reversing roller of the first reversing roller assembly 18, and continues to be pulled, so that fabric 45 passes through the first belt impregnation assembly 28 and the second belt impregnation assembly 29 of the belt impregnation assembly 27 and is in close contact with the impregnation belt 34 of the first belt impregnation assembly 28 and the second belt impregnation assembly 29. After the fabric 45 passes around the second reversing roller of the second reversing roller assembly 19, it is wound onto the take-up roll, thus completing the fabric impregnation process. For the initial installation of the rolls, after the initial installation of all fabric rolls is completed, the first inner impregnation core group 16 and the second inner impregnation core group 17 are installed inside the outer impregnation roll group 15. The first inner impregnation core group 16 is fixedly connected to the corner frame assembly 21 of the outer impregnation roll group 15, and the second inner impregnation core group 17 is fixedly connected to the corner frame assembly 21 of the outer impregnation roll group 15. Then, the first support shaft 5 installed on the left side of the first inner impregnation core group 16 and the second support shaft 6 installed on the right side of the second inner impregnation core group 17 are rotatably positioned between the two side supports 84. A rotary motor can be installed on the side support 84. A gear ring is provided on the outside of the first support shaft 5 and / or the second support shaft 6. A drive gear is provided at the end of the rotary motor. The drive gear meshes with the gear ring, thereby enabling the rotary motor to drive the first support shaft 5 and / or the second support shaft 6 to rotate. After completing the installation of the first impregnation core group 16 and the second impregnation core group 17, and rotating the first support shaft 5 and the second support shaft 6 to the side support 84, pour water-based slurry into the bottom frame 83, and then cover it with the impregnation cover 3 to prevent the water-based slurry from being contaminated.The suction pump located within the bottom frame 83 operates, with both opening and closing valves one and two in the open state. The aqueous slurry is drawn into the first inner cavity 47 of the first impregnating core assembly 16 through the first inner hole 41 of the bottom frame 83 via the suction pump, and then flows out from the second inner hole 42 of the first impregnating core assembly 16. Similarly, the aqueous slurry is drawn into the fourth inner cavity 50 of the second impregnating core assembly 17 through the second inner hole 42 of the bottom frame 83 via the suction pump, and then flows out from the first inner hole 41 of the second impregnating core assembly 17. The flowing-out aqueous slurry can then enter the third inner cavity 49 and the sixth inner cavity 52, and then enter the second inner cavity 48 and the fifth inner cavity 51, until the second inner cavity 48 and the fifth inner cavity 51... After the fifth inner cavity 51 is filled with water-based slurry, the first valve of the first impregnating core assembly 16 and the second valve of the second impregnating core assembly 17 are closed. This causes the telescopic drive assemblies 46 of both the first and second impregnating core assemblies 16 and 17 to operate, resulting in the inner extension frame 38 of the first impregnating core assembly 16 and the inner telescopic frame 38 of the second impregnating core assembly 17 alternatingly expanding and contracting. This allows the water-based slurry to reciprocate through multiple fabrics 45. Additionally, the first belt guide roller 32 and / or the second belt guide roller 33 of the first belt impregnation assembly 28 and / or the second belt impregnation assembly 29 rotate, moving the fabric 45. The winding drum 44 also performs a winding action, completing the winding of the fabric 45. When replenishment is detected, the first valve of the first impregnating core assembly 16 and the second valve of the second impregnating core assembly 17 are opened again until replenishment is complete. To ensure that the aqueous slurry can quickly fill the second inner cavity 48 and the fifth inner cavity 51 in the initial state, a vent with a valve is provided on the first side plate 39 of the first impregnation core assembly 16 near the front support frame assembly 59. This vent opens during the initial injection of the aqueous slurry and closes after the second inner cavity 48 is filled with the aqueous slurry. Similarly, a vent with a valve is provided on the second side plate 40 of the second impregnation core assembly 17 near the rear support frame assembly 60. This vent opens during the initial injection of the aqueous slurry and closes after the fifth inner cavity 51 is filled with the aqueous slurry. Since the fabric winding assembly 7 is located above the bottom frame 83, the bottom frame 83 can collect the aqueous slurry leaking from the fabric winding assembly 7 and then recycle it using a suction pump. Because several openings 85 are provided on the impregnation cover 3, and closing doors 86 are provided on the openings 85, the impregnated fabric can be easily removed. In addition, to prevent the fabric from wrinkling during impregnation, a transverse smoothing belt group 57 is set on the outer support frame 37. The movement of the left smoothing belt group 61 and the right smoothing belt group 62 completes the stretching of the fabric. It can impregnate multiple fabrics at once, and also prevent the fabric from wrinkling, thus improving the impregnation effect and impregnation efficiency.

[0073] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A water-based microfiber leather production process, characterized in that, The water-based microfiber leather production process includes the following steps: I. Preparation of water-based slurry: 100 parts of waterborne polyurethane emulsion and 5 parts of thickener were mixed to obtain a waterborne slurry; II. Impregnation: The aqueous slurry obtained in step one is added to the microfiber leather impregnation equipment (1). The microfiber leather impregnation equipment (1) includes an impregnation base (2) and a multi-fabric impregnation assembly (4). The multi-fabric impregnation assembly (4) includes a fabric winding assembly (7) and several fabric roll groups (8). The fabric winding assembly (7) includes an outer impregnation roll group (15), an outer sealing cover plate group (20), a first inner impregnation core group (16), and a second inner impregnation core group (17). The first inner impregnation core group (16) and the second inner impregnation core group (17) are arranged side by side inside the outer impregnation roll group (15). The outer sealing cover plate group (20) is arranged on the outer surface of the outer impregnation roll group (15). The outer impregnation roll group (15) includes several corner frame assemblies (21) and is arranged on the corner frame assemblies. (21) The belt impregnation assembly (27) between the outer impregnation roll assembly (15) and the first inner impregnation core assembly (16) and the second inner impregnation core assembly (17) are arranged in parallel. The fabric roll assembly (8) is inserted between the outer impregnation roll assembly (15) and the first inner impregnation core assembly (16) and between the outer impregnation roll assembly (15) and the second inner impregnation core assembly (17). The first inner impregnation core assembly (16) and the second inner impregnation core assembly (17) both include an outer support frame (37), an inner telescopic frame (38), a first side plate (39) and a second side plate (40). The inner telescopic frame (38) is located inside the outer support frame (37). The first side plate (39) and the second side plate (40) are fixedly arranged on both sides of the outer support frame (37). The space enclosed by the outer support frame (37), inner telescopic frame (38), first side plate (39), and second side plate (40) of the first inner impregnation core assembly (16) is the second inner cavity (48). The space inside the first belt impregnation assembly (28) is the third inner cavity (49). The space inside the second belt impregnation assembly (29) is the sixth inner cavity (52). The space enclosed by the outer support frame (37), inner telescopic frame (38), first side plate (39), and second side plate (40) of the second inner impregnation core assembly (17) is the fifth inner cavity (51). During impregnation, the inner telescopic frame of the first inner impregnation core assembly (16) and the inner telescopic frame of the second inner impregnation core assembly (17) extend and retract asynchronously. The first inner impregnation core assembly (16) extends from its minimum position. When it expands to its maximum, the second inner impregnation core group (17) shrinks from its maximum to its minimum. The water-based slurry passes through the fabric roll group (8) from the second inner cavity (48) and enters the third inner cavity (49) and the sixth inner cavity (52). Then it passes through the fabric roll group (8) and flows into the fifth inner cavity (51). After the second inner impregnation core group (17) shrinks to its minimum, it expands to its maximum again. The first inner impregnation core group (16) shrinks from its maximum to its minimum. The water-based slurry passes through the fabric roll group (8) from the fifth inner cavity (51) and enters the sixth inner cavity (52) and the third inner cavity (49). Then it passes through the fabric roll group (8) and flows back to the second inner cavity (48). The water-based slurry completes one cycle of flow. During impregnation, the fabric roll group (8) completes several cycles of flow with the water-based slurry. III. Post-alkali reduction treatment: The impregnated fabric roll (8) is dried to obtain the impregnated base fabric; the impregnated base fabric is subjected to alkali reduction treatment in a 5-15% sodium hydroxide aqueous solution, the base fabric after alkali reduction treatment is washed with water until neutral, and then dried to obtain water-based microfiber leather.

2. The water-based microfiber leather production process according to claim 1, characterized in that: The thickener is a polyurethane thickener; the drying temperature of the base fabric after washing to neutral is 100-130℃, the alkali reduction temperature is 75-95℃, and the alkali reduction time is 40-100min.

3. The water-based microfiber leather production process according to claim 1, characterized in that: The fabric roll group (8) includes n fabric rolls, where n is a natural number greater than or equal to 3, and the microfiber leather impregnation device (1) can impregnate n fabric rolls simultaneously.

4. The water-based microfiber leather production process according to claim 3, characterized in that: The first belt impregnation assembly (28) and the second belt impregnation assembly (29) both include a first belt guide roller (32), a second belt guide roller (33), and an impregnated belt (34). The impregnated belt (34) is an annular belt. The first belt guide roller (32) and the second belt guide roller (33) pass through the interior of the impregnated belt (34) and tighten the impregnated belt (34). The impregnated belt (34) is driven to rotate by the rotation of the first belt guide roller (32) and / or the second belt guide roller (33). The impregnated belt (34) includes a belt body (55). A plurality of impregnation hole groups (56) are provided on the belt body (55). The impregnation holes (89) included in the impregnation hole group (56) are arranged alternately along the axial direction of the first belt guide roller (32) or the second belt guide roller (33) and along the direction of the line connecting the first belt guide roller (32) and the second belt guide roller (33).

5. The water-based microfiber leather production process according to claim 4, characterized in that: The corner frame assembly (21) consists of two corner frames, each including a corner frame body (68), a first support rod (69), and a second support rod (70). The corner frame body (68) includes an upper support plate (71), a lower support plate (72), a first connecting cylinder (73), a second connecting cylinder (74), an upper connecting column (77), and a lower connecting column (78). The first connecting cylinder (73) is located at one end of the upper support plate (71) and the lower support plate (72), and the second connecting cylinder (74) is located at the other end of the upper support plate (71) and the lower support plate (72). The lower connecting column (78) is located at... The upper connecting column (77) is located in the middle of the lower support plate (72) near the first connecting column (73), and the upper connecting column (77) is located in the middle of the upper support plate (71) near the second connecting column (74). The first support rod (69) and the second support rod (70) are located at the upper end of the upper support plate (71). The corner frame body (68) includes a front straight surface (75) and a rear inclined surface (76). The rear inclined surfaces (76) of the two corner frames fit together to form the corner frame assembly (21). The included angle of the front straight surfaces (75) of the two corner frames is α, then α = 180° - (n - 2) * 180° / n = 360° / n.

6. The water-based microfiber leather production process according to claim 5, characterized in that: A first rotating hole (79) is provided in the first connecting cylinder (73), a second rotating hole (80) is provided in the second connecting cylinder (74), a third rotating hole (81) is provided in the lower connecting column (78), and a fourth rotating hole (82) is provided in the upper connecting column (77). The two ends of the first belt guide roller (32) of the first belt impregnation assembly (28) are rotatably connected to the first rotating hole (79) and the second rotating hole (80) respectively. The two ends of the second belt guide roller (33) of the first belt impregnation assembly (28) are rotatably connected to the third rotating hole (81) and the fourth rotating hole (82) respectively. The two ends of the first belt guide roller (32) of the second belt impregnation assembly (29) are rotatably connected to the fourth rotating hole (82) and the third rotating hole (81) respectively. The two ends of the second belt guide roller (33) of the second belt impregnation assembly (29) are rotatably connected to the second rotating hole (80) and the first rotating hole (79) respectively.

7. The water-based microfiber leather production process according to claim 1, characterized in that: The outer support frame (37) includes corner column groups (58), a front support frame group (59), a rear support frame group (60), a first side plate (39), and a second side plate (40). A plurality of corner column groups (58) are arranged between the front support frame group (59) and the rear support frame group (60). The first side plate (39) is located outside the front support frame group (59), and the second side plate (40) is located outside the rear support frame group (60). The inner telescopic frame (38) includes corner bracket groups (53) and telescopic plates (54). The telescopic plates (54) are arranged between adjacent corner bracket groups (53). The two ends of the corner bracket groups (53) and the telescopic plates (54) are respectively attached to the inner sides of the first side plate (39) and the second side plate (40). A telescopic drive assembly (46) is arranged between the outer support frame (37) and the inner telescopic frame (38).

8. The water-based microfiber leather production process according to claim 7, characterized in that: The impregnation base (2) includes a base frame (83) and two side supports (84), which are disposed on the base frame (83). The microfiber leather impregnation device (1) also includes a first support shaft (5) and a second support shaft (6). One end of the first support shaft (5) is connected to the first side plate (39) of the first inner impregnation core assembly (16), and the other end of the first support shaft (5) is provided with a first cover plate (87). One end of the second support shaft (6) is connected to the second side plate (40) of the second inner impregnation core assembly (17). On the second support shaft (6), a second cover plate (88) is provided at the other end. A first inner hole (41) is provided on the first side plate (39), and a second inner hole (42) is provided on the second side plate (40). An opening and closing valve one is provided in the first inner hole (41), and an opening and closing valve two is provided in the second inner hole (42). A suction pump is also provided in the bottom frame (83). The suction pump is connected to the first cover plate (87) and the second cover plate (88) through a pipeline. Pipeline interfaces for the pipeline to pass through are provided on the first cover plate (87) and the second cover plate (88).

9. A water-based microfiber leather production process according to any one of claims 1-8, characterized in that: The outer impregnation roll assembly (15) also includes a first extension frame assembly (30) and a second extension frame assembly (31). The first extension frame assembly (30) is located on one side of the corner frame assembly (21), and the second extension frame assembly (31) is located on the other side of the corner frame assembly (21). A first reversing roller assembly (18) is arranged between the first extension frame assemblies (30), and a second reversing roller assembly (19) is arranged between the second extension frame assemblies (31). The fabric roll assembly (8) includes several fabric rolls. The fabric rolls include a take-up roll (44), an unwind roll (43), and fabric (45) arranged therebetween. After the fabric (45) is released from the unwind roll (43), it passes through the first reversing roller assembly (18), then through the first belt impregnation assembly (28) and the second belt impregnation assembly (29), and after passing around the second reversing roller assembly (19), it is wound up by the take-up roll (44).

10. A water-based microfiber leather, characterized in that: The water-based microfiber leather is manufactured using the water-based microfiber leather production process described in any one of claims 1-9.

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