CN114457200A - Preparation process of polyurethane leather - Google Patents
Preparation process of polyurethane leather Download PDFInfo
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- CN114457200A CN114457200A CN202210213844.9A CN202210213844A CN114457200A CN 114457200 A CN114457200 A CN 114457200A CN 202210213844 A CN202210213844 A CN 202210213844A CN 114457200 A CN114457200 A CN 114457200A
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention relates to the field of polyurethane leather, in particular to a preparation process of polyurethane leather. The method comprises the steps of preparing a polyurethane fabric, coating, washing and drying. The water washing device comprises a water tank, a first guide roller, a second guide roller, a third guide roller, a rotary drum and a rolling brush. The rotary drum has the inner chamber, and the pivot of rotary drum extends to the inner chamber, and the pivot is hollow structure, pivot and outside delivery pipe intercommunication. The side wall of the rotary drum is provided with a water spraying hole for communicating the inner cavity with the outside. The down section and the up section of the leather channel in the water tank are both provided with a drum group and a rolling brush group, and the drum group is arranged on one side of the rolling brush group close to the bottom of the water tank. The leather washing machine can effectively improve the washing effect, ensures the washing effect, and simultaneously improves the washing efficiency, has positive significance for improving the overall production efficiency of leather, and is simple in structure and convenient to popularize and apply.
Description
Technical Field
The invention relates to the field of polyurethane leather, in particular to a preparation process of polyurethane leather.
Background
In traditional leather production process, production efficiency is lower, especially in the in-process of carrying out the washing, and the washing effect is unstable, and great fluctuation often appears in the washing effect, and this not only can image leather quality, can cause the influence to normal production rhythm moreover.
In view of this, the present application is specifically made.
Disclosure of Invention
The invention aims to provide a preparation process of polyurethane leather, which can effectively improve the washing effect, ensures the washing effect and also improves the washing efficiency, has positive significance for improving the overall production efficiency of the leather, and is simple in structure and convenient to popularize and apply.
The embodiment of the invention is realized by the following steps:
a preparation process of polyurethane leather comprises the following steps: preparing a polyurethane fabric, coating the polyurethane fabric on the surface of the leather, washing the leather by using a washing device after the polyurethane fabric is solidified, and drying the leather after the washing is finished.
Wherein, water washing unit includes: the device comprises a water tank, a first guide roller, a second guide roller, a third guide roller, a rotary drum and a rolling brush.
The first guide roller and the third guide roller are arranged at the opening part of the water tank and are respectively arranged at two sides of the water tank, the second guide roller is arranged at the bottom of the water tank, so that the leather can sequentially pass through the water tank through the first guide roller, the second guide roller and the third guide roller, and the part of the leather in the water tank is V-shaped.
The rotary drum is rotatable to be installed in the middle of the basin and locate more than the water level line, and the rotary drum has the inner chamber, and the pivot of rotary drum extends to the inner chamber, and the pivot is hollow structure, pivot and outside delivery pipe intercommunication. The side wall of the rotary drum is provided with a water spray hole for communicating the inner cavity with the outside.
The two groups of rotary drums are arranged in parallel at intervals to form a rotary drum group, and a gap for leather to pass through is reserved between the two groups of rotary drums in the rotary drum group. The two groups of rolling brushes are arranged in parallel at intervals to form a rolling brush group, and a gap for leather to pass through is reserved between the two groups of rolling brushes in the rolling brush group.
The down section and the up section of the leather channel in the water tank are provided with a drum group and a rolling brush group, and the drum group is arranged on one side of the rolling brush group close to the bottom of the water tank.
Furthermore, external section is installed to the pivot, and external section also is hollow structure. The external section is coaxially arranged with the rotating shaft, the external section is rotatably connected with the rotating shaft, the hollow channel of the external section is communicated with the hollow channel of the rotating shaft, and the external section and the rotating shaft are rotationally sealed. The external section is located the outside of rotary drum, and the one end that the rotary drum was kept away from to the external section is provided with the butt joint portion that is used for being connected with outside delivery pipe.
Further, the drum includes: barrel, baffle and pivot. The inner cavity is arranged in the cylinder body, and the water spraying holes are arranged on the side wall of the cylinder body. The rotating shaft is fixedly connected with a guide rod, and the guide rod is arranged along the radial direction of the rotating shaft and is positioned in the inner cavity. The baffle sets up along the axial of barrel, and baffle slidable ground cooperates in the guide arm, and butt elastic component between baffle and the pivot to be used for promoting the baffle and laminate in the inside wall of barrel and with the hole for water spraying shutoff.
The rotary drum is also provided with an auxiliary driving assembly for driving the baffle to move towards one side of the rotating shaft along the guide rod so as to enable the water spraying holes to be opened to spray water towards the leather.
Further, the rotating shaft comprises a first shaft body, a second shaft body and a third shaft body. The first shaft body, the second shaft body and the third shaft body are all arranged coaxially with the barrel.
The first shaft body is cylindrical and is connected with one end of the cylinder body. The second shaft body is connected to the other end of the cylinder body and matched with the external connection section. The third shaft body is accommodated in the first shaft body and is rotatably matched with the first shaft body, the end part of the third shaft body extends to the second shaft body and is rotatably matched with the end part of the second shaft body, and one end, far away from the second shaft body, of the third shaft body is fixedly connected with the water tank. The outside of first axis body is provided with the transmission portion that is used for with drive arrangement transmission fit.
The guide rod is fixedly connected to the first shaft body and/or the second shaft body.
One side that the baffle is close to the third axis body still fixedly connected with pull rod, the pull rod extends towards the third axis body, and the tip of pull rod is equipped with the gyro wheel.
The auxiliary driving assembly comprises a limiting ring, the third shaft body is further fixedly connected with the limiting ring, and the wheel surface of the roller is attached to the inner annular wall of the limiting ring. The inner ring wall of spacing ring is provided with the bellying to when the gyro wheel moved to the bellying along the inner ring wall of spacing ring, the bellying was pulled the pull rod towards third axis body place one side through the gyro wheel, thereby made the inner wall separation of baffle and barrel, made the hole for water spraying open.
Furthermore, the first shaft body and the second shaft body are fixedly connected with guide rods, and the other ends of the guide rods are fixedly connected with the inner wall of the cylinder body.
Further, the spacing ring includes the tourus and connecting plate. The connecting plate is discoid connecting plate perpendicular to third axis body setting, and the tourus, connecting plate and the concentric setting of third axis body three.
The internal diameter of the torus is matched with the external diameter of the connecting plate, and the torus is fixedly installed on the third shaft body through the connecting plate. And the thickness of the connecting plate is smaller than that of the annular ring body along the axial direction of the third shaft body.
A half shell is formed by a ring body and a connecting plate, and each limiting ring comprises two groups of half shells. In each limit ring, two groups of half shells are arranged in parallel at intervals, and the connecting plates are arranged close to the outer sides of the ring bodies relative to the limit rings.
The pull rod extends to the gap between the two groups of half shells of the limiting ring, and the rollers are respectively attached to the inner annular walls of the annular bodies of the two groups of half shells of the limiting ring. The convex part is arranged on the inner ring wall of the ring body.
Furthermore, the two ends of the bulge part and the inner ring wall of the ring body are smoothed.
Furthermore, the water spray holes are distributed along the circumferential direction of the cylinder body, and the baffles are distributed along the circumferential direction of the cylinder body for multiple groups so as to be used for plugging the water spray holes at different positions. The bulge is arranged on one side of the circular ring body close to the leather channel, so that the water spraying hole is opened when the water spraying hole faces the leather channel, and the water spraying hole is closed when the water spraying hole is far away from the leather channel.
Furthermore, the distance between the two groups of half shells in the limiting ring is slightly larger than the outer diameter of the pull rod, rollers are mounted on two sides of the pull rod, the rollers located on two sides of the pull rod are respectively attached to the inner ring walls of the two groups of half shells in the limiting ring, and a gap is reserved between the rollers and the connecting plate.
Further, when preparing the polyurethane fabric, the method comprises the following steps: selecting 100 parts by weight of waterborne polyurethane, 0.3-0.8 part by weight of waterborne flatting agent, 0.3-0.8 part by weight of waterborne thickener, 0.3-1.2 parts by weight of waterborne defoamer and 10-25 parts by weight of water, mixing and stirring for 30-60 min at the stirring speed of 800-1200 rpm and the material viscosity of 800-1200 cps (20 ℃).
The technical scheme of the embodiment of the invention has the beneficial effects that:
the preparation process of the polyurethane leather provided by the embodiment of the invention can effectively improve the washing effect, ensures the washing effect and simultaneously improves the washing efficiency, has positive significance for improving the overall production efficiency of the leather, and is simple in structure and convenient to popularize and apply.
In the washing process, the hole for water spraying on the rotary drum can not spray water simultaneously, but only the hole for water spraying towards the leather can open the water spraying, and other hole for water spraying are in a closed state, so that not only the water quantity is saved, but also the water sprayed out can be guaranteed to be accurately sprayed to the surface of the leather, and the rolling brush is matched to play a good cleaning effect.
The water tank is provided with a drainage pipeline for controlling the stability of the water level in the water tank. The water tank is internally stored with water, the down section of the leather is washed by the group of the rotary drums and the group of the rolling brushes and then washed by water once in the water tank, so that the surface can be effectively cleaned, and finally, the up section of the leather is washed by the group of the rotary drums and the group of the rolling brushes, so that the residues can be effectively reduced, and the cleaning effect is obviously improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic overall structure diagram of a water washing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a drum of a water washing apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic partial structural view of a drum of a water washing apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another perspective view of a drum of a water washing apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram illustrating an arrangement manner of a convex portion of a drum of the water washing apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic view of the fitting relationship between the drum and the leather passage of the washing apparatus provided in the embodiment of the present invention;
FIG. 7 is a schematic view of a first operating state of a drum of the water washing apparatus according to the embodiment of the present invention;
FIG. 8 is a schematic view of a second operating state of the drum of the water washing apparatus according to the embodiment of the present invention;
FIG. 9 is a schematic view of a third operating state of the drum of the water washing apparatus according to the embodiment of the present invention.
Description of reference numerals:
a water washing device 1000; a downstream segment 100; an upstream section 200; a water tank 300; a first guide roller 310; a second guide roller 320; a third guide roller 330; a rotating drum 400; a cylinder 410; an inner cavity 411; a blowhole 412; a baffle 420; a sliding sleeve 421; bumps 422; a pull rod 423; a roller 424; a rotating shaft 430; a first shaft body 431; the transmission portion 431 a; a second shaft body 432; a water outlet hole 432 a; a third shaft body 433; a guide rod 440; an elastic member 450; an outer connection section 460; a stop collar 500; a boss portion 510; a torus 520; a connecting plate 530; a half-shell 540; and a roll brush 600.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "parallel," "perpendicular," and the like do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel relative to "perpendicular," and does not mean that the structures are necessarily perfectly parallel, but may be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
The embodiment provides a preparation process of polyurethane leather, which comprises the following steps: preparing a polyurethane fabric, coating the polyurethane fabric on the surface of the leather, washing the leather by using a washing device 1000 after the polyurethane fabric is solidified, and drying the leather after the washing is finished.
Referring to fig. 1, fig. 2 and fig. 3, the water washing apparatus 1000 includes: a water tank 300, a first guide roller 310, a second guide roller 320, a third guide roller 330, a drum 400, and a roll brush 600.
The first guide roller 310 and the third guide roller 330 are provided at the mouth of the water tub 300 and are partially provided at both sides of the water tub 300, and the second guide roller 320 is provided at the bottom of the water tub 300 so that the leather can pass through the water tub 300 through the first guide roller 310, the second guide roller 320, and the third guide roller 330 in sequence, and the part of the leather in the water tub 300 is formed in a V-shape.
The drum 400 is rotatably installed in the water tank 300 and is disposed above the water level line, the drum 400 has an inner cavity 411, a rotating shaft 430 of the drum 400 extends to the inner cavity 411, the rotating shaft 430 is a hollow structure, and the rotating shaft 430 is communicated with an external water supply pipe. The side wall of the drum 400 is opened with a water spray hole 412 for communicating the inner chamber 411 with the outside.
The two groups of drums 400 are arranged in parallel at intervals to form the group of drums 400, and a gap for leather to pass through is reserved between the two groups of drums 400 in the group of drums 400. The two groups of rolling brushes 600 are arranged in parallel at intervals to form a rolling brush 600 group, and a gap for leather to pass through is reserved between the two groups of rolling brushes 600 in the rolling brush 600 group.
The lower row section 100 and the upper row section 200 of the leather passage in the water tank 300 are provided with a group of rotary drums 400 and a group of rolling brushes 600, and the group of rotary drums 400 is arranged on one side of the group of rolling brushes 600 close to the bottom of the water tank 300.
In general, the preparation process of the polyurethane leather provided by the embodiment of the invention can effectively improve the washing effect, ensures the washing effect and simultaneously improves the washing efficiency, has positive significance for improving the overall production efficiency of the leather, and is simple in structure and convenient to popularize and apply.
Referring to fig. 4, 5 and 6, in this embodiment, the drum 400 includes: cylinder 410, baffle 420 and rotating shaft 430. The cylinder 410 is cylindrical, the cavity 411 is opened in the cylinder 410, the cavity 411 is also cylindrical, and the cavity 411 and the cylinder 410 are coaxially arranged. The water spray hole 412 is opened in the sidewall of the cylinder 410, and the water spray hole 412 communicates the inner cavity 411 of the cylinder 410 with the outside.
The rotating shaft 430 is fixedly connected with a guide rod 440, and the guide rod 440 is arranged along the radial direction of the rotating shaft 430 and is positioned in the inner cavity 411. The baffle 420 is arranged along the axial direction of the cylinder 410, the baffle 420 is slidably fitted to the guide rod 440, and the elastic member 450 is abutted between the baffle 420 and the rotating shaft 430, so as to push the baffle 420 to be attached to the inner side wall of the cylinder 410 and seal the water spray hole 412.
The drum 400 is further provided with an auxiliary driving assembly for driving the baffle 420 along the guide rod 440 toward the side of the rotating shaft 430 so that the water spraying holes 412 are opened to spray water toward the leather.
The rotating shaft 430 is provided with an external connection section 460, and the external connection section 460 is also of a hollow structure. The external connection section 460 is coaxially arranged with the rotating shaft 430, the external connection section 460 is rotatably connected with the rotating shaft 430, the hollow channel of the external connection section 460 is communicated with the hollow channel of the rotating shaft 430, and the external connection section 460 and the rotating shaft 430 are rotatably sealed. The circumscribed section 460 is located outside the drum 400, and one end of the circumscribed section 460, which is away from the drum 400, is provided with a docking portion for connection with an external water supply pipe.
The rotating shaft 430 includes a first shaft body 431, a second shaft body 432, and a third shaft body 433. The first shaft body 431, the second shaft body 432 and the third shaft body 433 are all arranged coaxially with the cylinder 410.
The first shaft 431 is cylindrical and is fixedly coupled to one end of the cylinder 410. The second shaft 432 is fixedly connected to the other end of the cylinder 410, and the second shaft 432 is engaged with the outer connecting section 460. The second shaft body 432 is internally provided with a cavity, one end of the second shaft body 432, which is positioned outside the cylinder body 410, is rotatably connected with the external connection section 460 and realizes rotary sealing, and the external connection section 460 is communicated with the internal cavity of the second shaft body 432, so that the external connection section 460 can guide water in an external water supply pipe to the cavity of the second shaft body 432. The lateral wall of the second shaft body 432 is provided with water outlet holes 432a for pouring water into the inner cavity 411 of the cylinder 410, and the water outlet holes 432a are uniformly arranged along the circumferential direction of the second shaft body 432 at intervals.
The third shaft body 433 is accommodated in the first shaft body 431 and rotatably fitted to the first shaft body 431, an end portion of the third shaft body 433 extends to an end of the second shaft body 432 close to the first shaft body 431 and rotatably fitted to an end portion of the second shaft body 432, and an end of the third shaft body 433 away from the second shaft body 432 is fixedly connected to the water tank 300. Inside the cylinder 410, the first shaft body 431 and the second shaft body 432 are spaced apart and disposed at both ends of the cylinder 410, and a portion of the third shaft body 433 between the first shaft body 431 and the second shaft body 432 is exposed.
The first shaft 431 is externally provided with a transmission part 431a for transmission fit with an external driving device.
Through the design, the third shaft body 433 is fixed, the first shaft body 431 is driven by an external driving device through the transmission part 431a, the first shaft body 431 can rotate relative to the third shaft body 433, so that the cylinder 410 is driven to rotate, when the cylinder 410 rotates, the second shaft body 432 also rotates along with the cylinder 410, and the second shaft body 432 and the external section 460 also rotate relative to each other. In this case, not only the support for the cylinder 410 but also the external water supply pipe can smoothly supply water into the cylinder 410 while ensuring the normal rotation of the cylinder 410.
Further, the guide rod 440 is fixedly connected to the first shaft 431 and/or the second shaft 432, specifically, the guide rod 440 is fixedly connected to both the first shaft 431 and the second shaft 432, and the other end of the guide rod 440 is fixedly connected to the inner wall of the cylinder 410. This not only improves the structural stability of the guide rod 440, enables the baffle 420 to move more stably, but also further enhances the structural stability between the cylinder 410 and the rotating shaft 430.
The baffle 420 is further provided with a sliding sleeve 421 on a side close to the rotating shaft 430, the sliding sleeve 421 is fixedly connected to the plate surface of the baffle 420, the sliding sleeve 421 is slidably sleeved on the guide rod 440, the elastic member 450 is a column-shaped spring, the elastic member 450 is sleeved on the guide rod 440, and the elastic member 450 abuts between an end of the sliding sleeve 421 and the first rotating shaft 430 (or the second rotating shaft 430). In this way, the stability of the baffle 420 when sliding along the guide rod 440 can be further improved, and the baffle 420 is prevented from being stuck in the sliding process.
The side of the baffle 420 away from the rotating shaft 430 is further provided with a plurality of protruding points 422, the shape and size of the protruding points 422 are matched with the water spraying holes 412 on the cylinder 410, when the baffle 420 is attached to the inner wall of the cylinder 410, the protruding points 422 are matched in the water spraying holes 412, so that the blocking effect on the water spraying holes 412 is improved.
A pull rod 423 is further fixedly connected to one side, close to the third shaft body 433, of the baffle 420, the pull rod 423 extends towards the third shaft body 433, and a roller 424 is assembled at an end portion of the pull rod 423.
The auxiliary driving assembly comprises a limiting ring 500, the third shaft body 433 is further fixedly connected with the limiting ring 500, and the wheel surface of the roller 424 is attached to the inner annular wall of the limiting ring 500. The inner annular wall of the retainer ring 500 is provided with a protrusion 510, so that when the roller 424 moves to the protrusion 510 along the inner annular wall of the retainer ring 500, the protrusion 510 pulls the pull rod 423 towards the side where the third shaft body 433 is located through the roller 424, so that the baffle 420 is separated from the inner wall of the cylinder 410, and the water spraying hole 412 is opened.
Specifically, the stop collar 500 includes a torus 520 and a web 530. The connecting plate 530 is a disc-shaped connecting plate 530 perpendicular to the third shaft 433, and the torus 520, the connecting plate 530 and the third shaft 433 are concentrically arranged.
The inner diameter of the torus 520 is matched with the outer diameter of the connecting plate 530, and the torus 520 is fixedly mounted on the third shaft body 433 through the connecting plate 530. The thickness of the connecting plate 530 is smaller than that of the torus 520 in the axial direction of the third shaft body 433.
A ring 520 and a connecting plate 530 form a half-shell 540, and each retainer ring 500 includes two sets of half-shells 540. In each stop collar 500, two sets of half shells 540 are arranged side by side and spaced apart, and the connection plates 530 are arranged adjacent to the outer side of the circular ring 520 opposite to the stop collar 500.
The pull rod 423 extends into the gap between the two half shells 540 of the position-limiting ring 500, and the rollers 424 are respectively attached to the inner annular walls of the annular bodies 520 of the two half shells 540 of the position-limiting ring 500. The protrusion 510 is disposed on the inner annular wall of the torus 520.
The two ends of the protrusion 510 and the inner annular wall of the torus 520 are smoothed.
The distance between the two half shells 540 in the limiting ring 500 is slightly larger than the outer diameter of the pull rod 423, rollers 424 are mounted on two sides of the pull rod 423, the rollers 424 on the two sides of the pull rod 423 are respectively attached to the inner annular walls of the two half shells 540 in the limiting ring 500, and a gap is reserved between the rollers 424 and the connecting plate 530.
The water spray holes 412 are distributed along the circumference of the cylinder 410, and the baffles 420 are distributed along the circumference of the cylinder 410 in multiple groups for blocking the water spray holes 412 at different positions.
In this embodiment, a plurality of limiting rings 500 are arranged at intervals along the length direction of the third shaft body 433, and the baffle 420 is correspondingly connected with a plurality of pull rods 423 respectively matching with the plurality of limiting rings 500; the baffles 420 are arranged at intervals along the circumference of the cylinder 410, and the plurality of baffles 420 together block the water spraying holes 412 on the side wall of the cylinder 410
Referring to fig. 7, 8 and 9, the protrusion 510 of the limiting ring 500 is installed on one side of the circular ring 520 close to the leather passage, so that when the water spraying holes 412 face the leather passage, the rollers 424 move to the protrusion 510, the water spraying holes 412 can be opened smoothly, and the water spraying holes 412 can spray water to the leather accurately. When the water jet holes 412 are far away from the leather passage, the roller 424 is away from the protrusion 510, and the water jet holes 412 are closed.
Through the above design, the water spraying holes 412 on the rotary drum 400 can not spray water simultaneously, but only the water spraying holes 412 facing the leather can open the water spraying, and other water spraying holes 412 are in a closed state, so that the water is saved, the water can be sprayed accurately to the surface of the leather, and the rolling brush 600 can play a good cleaning effect.
The water tank 300 is provided with a drain pipe (not shown) for controlling the stabilization of the water level in the water tank 300. The water tank 300 stores water, the down section 100 of the leather is washed by the group of the rotary drums 400 and the group of the rolling brushes 600, and then the water is added into the water tank 300 once, so that the surface of the leather can be effectively cleaned, and finally the up section 200 of the leather is washed by the group of the rotary drums 400 and the group of the rolling brushes 600, so that the residue can be effectively reduced, and the cleaning effect is obviously improved.
In addition, the embodiment also provides a configuration method of the polyurethane fabric, which is only used as an optional example, but not limited to this, and other types of polyurethane fabrics and configuration methods thereof can be flexibly selected according to actual needs.
An exemplary method of formulating a polyurethane fabric comprises: selecting 100 parts by weight of waterborne polyurethane, 0.3-0.8 part by weight of waterborne flatting agent, 0.3-0.8 part by weight of waterborne thickener, 0.3-1.2 parts by weight of waterborne defoamer and 10-25 parts by weight of water, mixing and stirring for 30-60 min at the stirring speed of 800-1200 rpm and the material viscosity of 800-1200 cps (20 ℃). Through the design, the original leather thickness is more than 0.5MM, the water absorption is about 110%, the original leather thickness is 0.42-0.48MM through improvement, and the water absorption is more than 130%. And the consumption of raw materials is reduced. The original proportion is 0.6 kg of raw materials to produce 1 m of finished product, and 0.5 kg of raw materials can be improved to produce 1 m of finished product.
In conclusion, the preparation process of the polyurethane leather provided by the embodiment of the invention can effectively improve the washing effect, ensures the washing effect and simultaneously improves the washing efficiency, has positive significance for improving the overall production efficiency of the leather, and is simple in structure and convenient to popularize and apply.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation process of polyurethane leather is characterized by comprising the following steps: preparing a polyurethane fabric, coating the polyurethane fabric on the surface of leather, washing the leather by using a washing device after the polyurethane fabric is solidified, and drying the leather after the washing is finished;
wherein, water washing unit includes: the device comprises a water tank, a first guide roller, a second guide roller, a third guide roller, a rotary drum and a rolling brush;
the first guide roller and the third guide roller are arranged at the opening part of the water tank and are respectively arranged at two sides of the water tank, the second guide roller is arranged at the bottom of the water tank, so that the leather can sequentially pass through the water tank through the first guide roller, the second guide roller and the third guide roller, and the part of the leather in the water tank is in a V shape;
the rotary drum can be rotatably arranged in the water tank and is arranged above a water level line, the rotary drum is provided with an inner cavity, a rotary shaft of the rotary drum extends to the inner cavity, the rotary shaft is of a hollow structure, and the rotary shaft is communicated with an external water supply pipe; the side wall of the rotary drum is provided with a water spraying hole for communicating the inner cavity with the outside;
the two groups of rotary drums are arranged in parallel at intervals to form a rotary drum group, and a gap for leather to pass through is reserved between the two groups of rotary drums in the rotary drum group; the two groups of rolling brushes are arranged in parallel at intervals to form a rolling brush group, and a gap for leather to pass through is reserved between the two groups of rolling brushes in the rolling brush group;
the lower section and the upper section of the leather channel in the water tank are provided with the drum group and the rolling brush group, and the drum group is arranged on one side of the rolling brush group close to the bottom of the water tank.
2. The polyurethane leather preparation process according to claim 1, wherein the rotating shaft is provided with an external connection section, and the external connection section is also of a hollow structure; the external section is coaxially arranged with the rotating shaft, the external section is rotatably connected with the rotating shaft, a hollow channel of the external section is communicated with a hollow channel of the rotating shaft, and the external section and the rotating shaft are rotatably sealed; the external section is located the outside of rotary drum, just the one end that the external section kept away from the rotary drum is provided with the butt joint portion that is used for being connected with outside delivery pipe.
3. The process for preparing polyurethane leather according to claim 2, wherein the drum comprises: the cylinder, the baffle and the rotating shaft; the inner cavity is arranged in the cylinder body, and the water spraying hole is arranged on the side wall of the cylinder body; the rotating shaft is fixedly connected with a guide rod, and the guide rod is arranged along the radial direction of the rotating shaft and is positioned in the inner cavity; the baffle is arranged along the axial direction of the cylinder body, the baffle can be matched with the guide rod in a sliding mode, and an elastic part is abutted between the baffle and the rotating shaft so as to push the baffle to be attached to the inner side wall of the cylinder body and seal the water spraying hole;
the rotary drum is further provided with an auxiliary driving assembly for driving the baffle to move towards one side where the rotary shaft is located along the guide rod, so that the water spraying holes are opened to spray water towards the leather.
4. The process for preparing polyurethane leather according to claim 3, wherein the rotating shaft comprises a first shaft body, a second shaft body and a third shaft body; the first shaft body, the second shaft body and the third shaft body are coaxially arranged with the cylinder body;
the first shaft body is cylindrical and is connected with one end of the cylinder body; the second shaft body is connected to the other end of the cylinder body and matched with the external connection section; the third shaft body is accommodated in the first shaft body and is rotatably matched with the first shaft body, the end part of the third shaft body extends to the second shaft body and is rotatably matched with the end part of the second shaft body, and one end, far away from the second shaft body, of the third shaft body is fixedly connected with the water tank; a transmission part which is used for being in transmission fit with the driving device is arranged outside the first shaft body;
the guide rod is fixedly connected to the first shaft body and/or the second shaft body;
a pull rod is fixedly connected to one side, close to the third shaft body, of the baffle plate, the pull rod extends towards the third shaft body, and an idler wheel is assembled at the end of the pull rod;
the auxiliary driving assembly comprises a limiting ring, the third shaft body is also fixedly connected with the limiting ring, and the wheel surface of the roller is attached to the inner annular wall of the limiting ring; the inner ring wall of the limiting ring is provided with a protruding portion, so that when the roller moves to the protruding portion along the inner ring wall of the limiting ring, the protruding portion pulls the pull rod towards one side where the third shaft body is located through the roller, the baffle is separated from the inner wall of the cylinder, and the water spray hole is opened.
5. The polyurethane leather preparation process is characterized in that the first shaft body and the second shaft body are fixedly connected with the guide rod, and the other end of the guide rod is fixedly connected with the inner wall of the cylinder body.
6. The polyurethane leather preparation process is characterized in that the limiting ring comprises a ring body and a connecting plate; the connecting plate is disc-shaped, the connecting plate is perpendicular to the third shaft body, and the annular body, the connecting plate and the third shaft body are concentrically arranged;
the inner diameter of the annular body is matched with the outer diameter of the connecting plate, and the annular body is fixedly arranged on the third shaft body through the connecting plate; the thickness of the connecting plate is smaller than that of the annular ring body along the axial direction of the third shaft body;
the annular body and the connecting plate form a half shell, and each limiting ring comprises two groups of half shells; in each limiting ring, two groups of half shells are arranged in parallel at intervals, and the connecting plates are arranged close to the outer sides of the circular ring bodies relative to the limiting rings;
the pull rod extends into a gap between the two groups of half shells of the limiting ring, and the rollers are respectively attached to the inner annular walls of the annular bodies of the two groups of half shells of the limiting ring; the convex part is arranged on the inner annular wall of the annular ring body.
7. The polyurethane leather preparation process is characterized in that the two ends of the bulge parts and the inner annular wall of the annular ring body are subjected to smoothing treatment.
8. The polyurethane leather preparation process is characterized in that the water spray holes are distributed along the circumferential direction of the cylinder body, and the baffles are distributed along the circumferential direction of the cylinder body in multiple groups for plugging the water spray holes at different positions; the bulge is arranged on one side of the circular ring body close to the leather channel, so that the water spraying hole is opened when the water spraying hole faces the leather channel, and the water spraying hole is closed when the water spraying hole is far away from the leather channel.
9. The polyurethane leather preparation process of claim 6, wherein the distance between the two sets of half shells in the limiting ring is slightly larger than the outer diameter of the pull rod, the rollers are mounted on two sides of the pull rod, the rollers on the two sides of the pull rod are respectively attached to the inner annular walls of the two sets of half shells in the limiting ring, and a gap is reserved between the rollers and the connecting plate.
10. The process for preparing polyurethane leather according to claim 1, wherein the process for preparing the polyurethane fabric comprises the following steps: selecting 100 parts by weight of waterborne polyurethane, 0.3-0.8 part by weight of waterborne flatting agent, 0.3-0.8 part by weight of waterborne thickener, 0.3-1.2 parts by weight of waterborne defoamer and 10-25 parts by weight of water, mixing and stirring for 30-60 min at the stirring speed of 800-1200 rpm and the material viscosity of 800-1200 cps (20 ℃).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210213844.9A CN114457200B (en) | 2022-03-04 | 2022-03-04 | Preparation process of polyurethane leather |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210213844.9A CN114457200B (en) | 2022-03-04 | 2022-03-04 | Preparation process of polyurethane leather |
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| CN114457200A true CN114457200A (en) | 2022-05-10 |
| CN114457200B CN114457200B (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805999A (en) * | 2009-02-17 | 2010-08-18 | 福建宝利特集团有限公司 | Method for fabricating imitated artificial leather by applying waterborne polyurethane |
| CN107142343A (en) * | 2017-06-29 | 2017-09-08 | 梁溪区旭中通用机械设计工作室 | A kind of leather cleans dust arrester |
| CN206951325U (en) * | 2017-07-04 | 2018-02-02 | 江西升华新材料有限公司 | Ball mill and pulping equipment |
| CN215328737U (en) * | 2021-01-29 | 2021-12-28 | 芜湖蓝森亚麻科技有限公司 | Flax is cloth washing and drying device for weaving |
-
2022
- 2022-03-04 CN CN202210213844.9A patent/CN114457200B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805999A (en) * | 2009-02-17 | 2010-08-18 | 福建宝利特集团有限公司 | Method for fabricating imitated artificial leather by applying waterborne polyurethane |
| CN107142343A (en) * | 2017-06-29 | 2017-09-08 | 梁溪区旭中通用机械设计工作室 | A kind of leather cleans dust arrester |
| CN206951325U (en) * | 2017-07-04 | 2018-02-02 | 江西升华新材料有限公司 | Ball mill and pulping equipment |
| CN215328737U (en) * | 2021-01-29 | 2021-12-28 | 芜湖蓝森亚麻科技有限公司 | Flax is cloth washing and drying device for weaving |
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|---|---|
| CN114457200B (en) | 2023-06-09 |
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