Core for urine-feces zoned absorption and production process therefor

Abstract

Provided are a core for urine-feces zoned absorption and a production process therefor. The core comprises a core main body (1). The core main body (1) comprises a lower-layer core (11), two urine cores (12) separately disposed on the top of the lower-layer core (11), and a wrapping layer (14) that wraps the lower-layer core (11) and the urine cores (12). The two urine cores (12) are arranged along a length direction. The two urine cores (12) are disposed on both sides of the lower-layer core (11), respectively. A fecal liquid channel (13) is formed between the two urine cores (12). The urine core (12) comprises a first non-woven fabric (121) and a first polymer layer (122) arranged in a composite manner. The lower-layer core (11) achieves the effects of conduction, support, storage, liquid absorption, and feces absorption. The urine cores (12) primarily achieve the effects of liquid absorption and side leakage prevention. The fecal liquid channel (13) can temporarily store and divert a large amount of liquid, thereby solving the technical problem of poor diversion and absorption effects in the core.

Description

A core for urine and feces partitioned absorption and a production process thereof TECHNICAL FIELD

[0001] The present application relates to the field of disposable sanitary products, in particular to a core for urine and feces partitioned absorption and a production process thereof. BACKGROUND

[0002] At present, most of the existing cores absorb urine and feces together, and urine and feces absorption is usually concentrated in the middle part of the core. When urine and feces are absorbed, a large amount of liquid will be concentrated in the middle part of the core. The middle part of the core is difficult to absorb a large amount of liquid in a short time, and the liquid will spread, which may cause urine side leakage and poor urine diversion and absorption effect.

[0003] Chinese patent application No. 201821700092.4 discloses a 3D diversion absorption core, which is connected from top to bottom by an upper cover layer, a composite absorption core layer, and a lower cover layer. The composite absorption core layer is composed of one or more than one absorption core. High water absorption resin low density distribution areas are arranged at the center position or / and the center symmetric positions of the two sides on the transverse width of the composite absorption core layer. A top diversion body and a bottom diversion body corresponding to the top diversion body and facing away from each other are respectively arranged at the top and bottom of the 3D diversion absorption core corresponding to the high water absorption resin low density distribution areas. A diversion groove circumferentially surrounding a 3D convex body is respectively arranged in the top diversion body and the bottom diversion body. The diversion effect of the absorption core is poor, which may cause urine side leakage and poor urine diversion and absorption effect. SUMMARY

[0004] Therefore, in view of the above problems, the present application provides a core for urine and feces partitioned absorption and a production process thereof. The technical problem of poor core diversion and absorption effect is solved.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A core for urine and feces partitioned absorption, comprising a core body, wherein the core body comprises a lower core, two urine cores respectively arranged on the top of the lower core, a wrapping layer wrapping the lower core and the urine cores, the two urine cores are arranged along the length direction, the two urine cores are respectively arranged on the two sides of the lower core, a feces passage is formed between the two urine cores, the width of the feces passage is not less than 2 cm, and the urine core comprises a first non-woven fabric and a first polymer layer arranged in combination.

[0007] Further:

[0008] The thickness of the middle part of the lower core is less than the thickness of the two sides, and a V-shaped diversion groove is formed on the top of the lower core or the top of the middle part of the lower core.

[0009] The first polymer layer is located below the first non-woven fabric.

[0010] The volume of the polymer particles of the urine core is less than the volume of the polymer particles of the lower core, the liquid absorption speed of the urine core is greater than the liquid absorption speed of the lower core, and the secondary liquid absorption effect of the lower core is better than the secondary liquid absorption effect of the urine core.

[0011] The inner side of the urine core is in a wavy shape.

[0012] The thickness of the lower core is at least 2.5 times the thickness of the urine core.

[0013] One end of the urine core extends above the flow guide groove.

[0014] The application also provides a production process of the urine and feces partitioned absorption core, comprising the following steps:

[0015] S1. Urine core forming: the first polymer material feeding device comprises a first polymer forming bin, a first shell arranged at the bottom of the first polymer forming bin, a first mold wheel rotatably arranged in the first shell, a first driving device for driving the rotation of the first mold wheel, a first feeding port arranged at the top of the first shell, a first discharging port arranged at the bottom of the first shell, a plurality of first mold grooves arranged on the first mold wheel, and the first polymer material in the first polymer material feeding device falls from the first feeding port to the first mold wheel, part of the first polymer material directly falls into the first mold groove, and the other part of the first polymer material slides along the surface of the first mold wheel into the first mold groove, when the first mold groove rotates to the first discharging port, the first mold groove sprinkles the first polymer material from the first discharging port to the first non-woven fabric, and the first non-woven fabric and the first polymer layer form the urine core;

[0016] S2. Lower Core Molding: The second polymer feeding device includes a second polymer molding chamber, a second shell located at the bottom of the second polymer molding chamber, a second mold wheel rotatably disposed within the second shell, and a second driving device for driving the second mold wheel to rotate. The second shell has a second inlet at its top and a second outlet at its bottom. The second mold wheel has multiple second mold grooves, each including a first groove in the middle and second grooves at both ends. The cross-sectional area of ​​the first groove gradually increases from the middle to both ends. The second polymer material falls from the second inlet onto the second mold wheel. Part of the second polymer material... The material falls directly into the second mold groove, while another portion of the second polymer material slides from the surface of the second mold wheel into the second mold groove. When the second mold groove rotates to the second outlet, it sprinkles the second polymer material from the second outlet onto the second nonwoven fabric, forming a second polymer layer on the second nonwoven fabric. The second polymer material from the first groove is sprinkled onto the second nonwoven fabric, gradually increasing from the middle to both ends, so that a V-shaped groove is formed in the middle of the top surface of the second polymer layer. Then, another layer of second nonwoven fabric is laminated onto the second polymer layer to form the lower core. The lower core includes the second nonwoven fabric, the second polymer layer, and the second nonwoven fabric laminated from top to bottom.

[0017] S3. Cutting and separating the urine core: The urine core is flipped 180 degrees by a flipping device so that the first polymer layer is located below the first nonwoven fabric. The first cutting device cuts the middle of the urine core to form two urine cores. The two urine cores are separated by a guide device.

[0018] S4. Composite: The composite roller device combines two urine cores onto the lower core to form the core body, and a fecal channel is formed between the two urine cores.

[0019] Further:

[0020] It also includes step S5. Wrapping the core: The wrapping device wraps the core with the wrapping layer to form the core body.

[0021] The guiding device includes multiple guide rollers, with annular baffles on both sides of the guide rollers. Two urine cores are conveyed between the two baffles and move outward through the baffles of the multiple guide rollers.

[0022] By adopting the aforementioned technical solution, the beneficial effects of the present invention are:

[0023] The lower core of this invention primarily functions to guide, absorb stool and liquid, while the urine core mainly absorbs liquid and prevents side leakage. The stool channel can buffer and guide large amounts of liquid. When liquid enters the stool channel, it can quickly flow along the channel, reducing the amount of liquid accumulating in the middle. The two urine cores block and absorb urine, improving its diffusion and absorption, and preventing side leakage. When stool falls into the lower core, it is absorbed, and the stool seeps into the lower core. The stool channel also provides some isolation, preventing the buttocks from contacting large amounts of stool and preventing diaper rash. The left and right partitions are designed to accommodate the different physiological positions of boys and girls, ensuring that even if the garment is worn too high or too low, it will not affect stool and liquid absorption. The urine core uses only one thin layer of non-woven fabric, allowing for faster liquid seepage and absorption, preventing side leakage. The lower core has a flow channel to increase the buffering of stool. The storage and diversion space features a slope on both sides, providing resistance to the lateral flow of urine and improving the longitudinal diversion effect while also effectively preventing side leakage. Furthermore, the volume of the polymer particles in the urine core is smaller than that in the lower core. Larger particles of the same type have stronger secondary liquid absorption capacity, while smaller particles have better absorption speed. By using polymer particles of different sizes, the secondary absorption and side leakage prevention effects of the core are improved. Furthermore, the inner edge of the urine core is wavy, increasing the contact area between the laterally moving liquid and the core, thus providing some diversion. Furthermore, the thickness of the lower core is at least 2.5 times that of the urine core itself, while the upper core is thinner, resulting in a thinner overall core structure and improved absorption rate. Finally, one end of the urine core extends above the diversion channel, preventing urine from flowing back to the top of the diversion layer, thus providing some reverse osmosis. Attached Figure Description

[0024] Figure 1 is a simplified cross-sectional view of the core body.

[0025] Figure 2 is a top view of the lower core and the urine core.

[0026] Figure 3 is a cross-sectional view of the lower core.

[0027] Figure 4 is a cross-sectional view of the urine core, which has a three-layer structure.

[0028] Figure 5 is a simplified cross-sectional view of another structure of the core body.

[0029] Figure 6 is a simplified diagram of the manufacturing process of the core body.

[0030] Figure 7 is a schematic diagram of the first polymer feeding device.

[0031] Figure 8 is a schematic diagram of the structure of the first mold wheel.

[0032] Figure 9 is a schematic diagram of the second polymer feeding device.

[0033] Figure 10 is a schematic diagram of the second mold wheel.

[0034] Figure 11 is a simplified structural diagram of the guiding device.

[0035] Figure 12 is a side view of the second polymer feeding device.

[0036] Figure 13 is a schematic diagram of the structure of the second polymer layer.

[0037] Reference numerals: 1. Core body; 11. Lower core; 111. Second nonwoven fabric; 112. Second polymer layer; 1121. Guide section; 1122. Liquid absorption section; 113. Guide channel; 12. Urine core; 121. First nonwoven fabric; 122. First polymer layer; 13. Fecal liquid channel; 14. Encapsulation layer; 2. First polymer feeding device; 21. First polymer molding chamber; 22. First shell; 221. First inlet; 222. First outlet; 23. First mold wheel; 230. First mold groove; 24. First drive device; 3. Second polymer feeding device; 31, Second polymer molding chamber; 311, First feeding chamber; 312, Second feeding chamber; 313, First feeding port; 314, Second feeding port; 32, Second shell; 321, Second inlet; 322, Second outlet; 33, Second mold wheel; 330, Second mold groove; 3301, First groove; 3302, Second groove; 34, Second drive device; 4, First cutting device; 5, Guide device; 51, Guide roller; 52, Baffle; 6, Composite roller device; 7, Wrapping device; 8, Tilting device. Detailed Implementation

[0038] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0039] Referring to Figures 1 and 2, this embodiment provides a core for urine and feces zoning absorption, including a core body 1. The core body 1 includes a lower core 11 and two urine cores 12 respectively disposed on top of the lower core 11. The two urine cores 12 are arranged along the length direction and are respectively disposed on both sides of the lower core 11, forming a feces channel 13 between the two urine cores 12. The width of the feces channel 13 is not less than 2 cm. The urine core 12 includes a first non-woven fabric 121 and a first polymer layer 122 compositely disposed, with the first polymer layer 122 located below the first non-woven fabric 121. The inner edge of the urine core 12 is wavy. The absorption speed of the urine core 12 is greater than that of the lower core 11, and the secondary absorption effect of the lower core 11 is better than that of the urine core 12. The volume of the polymer particles in the urine core 12 is smaller than that in the lower core 11. The core body 1 also includes a wrapping layer 14, which wraps the lower core 11 and two urine cores 12. The thickness of the lower core 11 is at least 2.5 times the thickness of the urine cores 12. The thickness of the middle part of the lower core 11 is less than the thickness of the sides, and a V-shaped guide groove 113 is formed at the top of the middle part of the lower core 11.

[0040] Referring to Figure 3, the lower core 11 includes two layers of second nonwoven fabric 111 and a second polymer layer 112 disposed between the two layers of second nonwoven fabric 111; the lower core 11 may also be provided with only one layer of second nonwoven fabric 111; the lower core 11 may also adopt other structures, depending on the specific circumstances.

[0041] Referring to Figure 4, the urine core 12 can also be provided with two layers of first nonwoven fabric 121, that is, including a composite first nonwoven fabric 121, a first polymer layer 122 and a first nonwoven fabric 121. In this structure, the urine core 12 has a larger thickness and a relatively slower infiltration rate.

[0042] Referring to Figure 5, one end of the urine core 12 may not extend above the guide groove 113, depending on the specific situation.

[0043] The width of the above-mentioned fecal channel 13 shall not be less than 2 cm, and may be set to 2 cm, 3 cm, 4 cm, 5 cm or even larger, depending on the specific situation.

[0044] The aforementioned wrapping layer 14 may be omitted, or the wrapping layer 14 may wrap the urine core 12 and the lower core 11 respectively, depending on the specific situation.

[0045] The aforementioned first polymer layer 122 may also be disposed above the first nonwoven fabric 121.

[0046] The absorption speed of the urine core 12 can also be equal to or less than the absorption speed of the lower core 11, depending on the specific situation.

[0047] The secondary absorption effect of the urine core 12 can be better than or equal to the secondary absorption effect of the lower core 11, depending on the specific situation.

[0048] The volume of the polymer particles in the urine core 12 can also be greater than or equal to the volume of the polymer particles in the lower core 11.

[0049] The inner edge of the urine core 12 can also be a straight line, an arc, or other structures, depending on the specific circumstances.

[0050] The thickness of the lower core 11 can be 3 times, 3.5 times, 4 times or even more than that of the urine core 12. The thickness of the lower core 11 can also be less than 2.5 times the thickness of the urine core 12, such as 1.5 times or 2 times, depending on the specific situation.

[0051] The first nonwoven fabric 121 mentioned above is usually set in blue to make the core body 1 more aesthetically pleasing.

[0052] The working principle of this invention is as follows:

[0053] When diapers or pull-ups are worn, urine passes through the diversion layer into the urine channel 13. The urine channel 13 can buffer and divert a large amount of urine, allowing it to quickly spread along the channel 13. This reduces urine accumulation in the middle, while urine flowing to the sides is quickly absorbed by the urine core 12, effectively preventing side leakage. The two urine cores 12 also have the function of blocking and absorbing urine, improving the diffusion and absorption effect. When feces fall into the lower core 11, it is absorbed and seeps into the lower core 11. The urine channel 13 and the diversion channel 113 have a certain isolation effect, preventing the buttocks from contacting a large amount of feces and preventing diaper rash. The left and right partitions are designed to accommodate boys and girls due to their different physiological positions. Even if the diaper is worn too high or too low, it will not affect the absorption of feces and urine.

[0054] Referring to Figures 6 to 11, the present invention also provides a manufacturing process for a core for urine and feces partitioning absorption, comprising the following steps:

[0055] S1. Urine core 12 molding: The first polymer feeding device 2 includes a first polymer molding chamber 21, a first housing 22 disposed at the bottom of the first polymer molding chamber 21, a first mold wheel 23 rotatably disposed within the first housing 22, and a first driving device 24 for driving the first mold wheel 23 to rotate. The first housing 22 has a first inlet 221 at the top and a first outlet 222 at the bottom. The first mold wheel 23 has a plurality of first mold grooves 230. The first polymer material in the first polymer feeding device 2 is fed from the first mold wheel 22 into the first mold wheel 23. At the inlet 221, the material falls onto the first mold wheel 23. Part of the first polymer material falls directly into the first mold groove 230, while another part of the first polymer material slides along the surface of the first mold wheel 23 into the first mold groove 230. When the first mold groove 230 rotates to the first outlet 222, the first mold groove 230 sprinkles the first polymer material from the first outlet 222 onto the first nonwoven fabric 121, forming a first polymer layer 122 on the first nonwoven fabric 121. The first nonwoven fabric 121 and the first polymer layer 122 form the urine core 12.

[0056] S2. Lower Core 11 Forming: The second polymer feeding device 3 includes a second polymer forming chamber 31, a second housing 32 located at the bottom of the second polymer forming chamber 31, a second mold wheel 33 rotatably located within the second housing 32, and a second driving device 34 for driving the second mold wheel 33 to rotate. The second housing 32 has a second inlet 321 at its top and a second outlet 322 at its bottom. The second mold wheel 33 has multiple second mold grooves 330, each including a first groove 3301 located in the middle and second grooves 3302 located at both ends. The cross-sectional area of ​​the first groove 3301 gradually increases from the middle to both ends. The second polymer material falls from the second inlet 321 onto the second mold wheel 33, with some of the second polymer material falling directly onto the second mold wheel 33. Another portion of the second polymer material slides from the surface of the second mold wheel 33 into the second mold groove 330. When the second mold groove 330 rotates to the second discharge port 322, the second mold groove 330 sprinkles the second polymer material from the second discharge port 322 onto the second nonwoven fabric 111, forming a second polymer layer 112 on the second nonwoven fabric 111. The second polymer material of the first groove 3301 is sprinkled onto the second nonwoven fabric 111, gradually increasing from the middle to both ends, so that a V-shaped groove is formed in the middle of the top surface of the second polymer layer 112. Then, another layer of second nonwoven fabric 111 is laminated onto the second polymer layer 112 to form the lower core 11. The lower core 11 includes the second nonwoven fabric 111, the second polymer layer 112, and the second nonwoven fabric 111 laminated from top to bottom.

[0057] S3. Cutting and separating the urine core 12: The urine core 12 is flipped 180 degrees by the flipping device 8, so that the first polymer layer 122 is located below the first nonwoven fabric 121. The first cutting device 4 cuts the middle part of the urine core 12 with a wavy cutting line to form two pieces of urine core 12. The two pieces of urine core 12 are separated by a distance by the guiding device 5. The guiding device 5 includes multiple guiding rollers 51. The guiding rollers 51 are provided with annular baffles 52 on both sides, and move outward through the baffles 52 of the multiple guiding rollers 51.

[0058] S4. Composite: The composite roller device 6 composites two urine cores 12 onto the lower core 11 to form the core body 1. A fecal channel 13 is formed between the two urine cores 12, and one end of the urine core 12 extends above the guide groove 113.

[0059] S5. Encapsulating the core: The encapsulation device 7 encapsulates the core with the encapsulation layer 14 to form the core body 1.

[0060] The first polymer molding chamber 21 and the second polymer molding chamber 31 mentioned above are known devices and will not be described in detail here.

[0061] There is a gap between the inner wall of the first housing 22 and the outer wall of the first mold wheel 23. The gap distance is usually set between 1mm and 6mm, but can also be set to other values, depending on the specific situation.

[0062] There is a gap between the inner wall of the second housing 32 and the outer wall of the second mold wheel 33. The gap distance is usually set between 1mm and 6mm, but can also be set to other values, depending on the specific situation.

[0063] Referring to Figure 7, the position of the first discharge port 222 is set within the range of 30 to 60 degrees on the lower right or lower left side of the first housing 22, usually set at 45 degrees. In this way, when the first polymer material is discharged from the first discharge port 222, the first polymer material can be sprayed onto the first nonwoven fabric 121 in a downward inclined direction. The first polymer material and the first nonwoven fabric 121 are in contact at approximately a 45-degree angle. The forces between the first polymer material and the first nonwoven fabric 121 in the vertical and horizontal directions are relatively balanced. The first polymer material sprayed onto the first nonwoven fabric 121 will move horizontally and come into contact with and mix with other first polymer materials to form a relatively uniform first polymer layer 122.

[0064] The first discharge port 222 can also be located directly below the first housing 22. In this structure, the horizontal velocity of the first polymer material is relatively high, the distance the first polymer material moves on the first nonwoven fabric 121 is relatively large, and the impact force between the first polymer materials is large, which can easily lead to uneven feeding. The first discharge port 222 can also be located on the left or right side of the first housing 22. In this structure, the first polymer material falls vertically, which may cause the first polymer material to accumulate or break on the first nonwoven fabric 121, which can easily lead to uneven feeding.

[0065] The position of the first discharge port 222 can also be set at 15 degrees, 40 degrees, 50 degrees or other values ​​on the lower right or lower left side of the first housing 22, depending on the specific situation.

[0066] Referring to Figure 9, the position of the second discharge port 322 is set within the range of 30 to 60 degrees on the lower right or lower left side of the second housing 32, usually set at 45 degrees, but it can also be in other positions, depending on the specific situation.

[0067] The first driving device 24 and the second driving device 34 mentioned above can be a drive motor or other devices, which are well-known devices and will not be described in detail here.

[0068] The aforementioned first polymeric material may be composed of one or more of SAP, wood pulp, or other polymeric materials.

[0069] The aforementioned second polymeric material can be composed of one or more of SAP, wood pulp, or other polymeric materials.

[0070] The blade of the first cutting device 4 is wavy, but can also be a ring structure, a spiral structure or other shapes, to cut the inner side of the urine core 12 into the corresponding shape, depending on the situation.

[0071] The aforementioned composite roller device 6 is a known device and will not be described in detail here.

[0072] The aforementioned wrapping device 7 is capable of wrapping the wrapping layer 14 and is a known device, so it will not be described in detail here.

[0073] The aforementioned flipping device 8 is capable of flipping the urine core 12 180 degrees. It is a known device and will not be described in detail here.

[0074] The aforementioned guiding device 5 can also employ multiple clamping rollers, guide plates, or other structures for guidance, depending on the specific circumstances.

[0075] The rear end of the composite roller device 6 can be equipped with a winding roller device to wind up the core body 1. Alternatively, the above-mentioned production device can be set on a disposable hygiene product production line to composite the formed core body 1 with other surface layers such as the guide layer and the liquid-impermeable bottom layer to form pull-up pants, diapers, sanitary napkins or other disposable hygiene products.

[0076] The second polymer feeding device 3 of the present invention can adopt the following feeding process:

[0077] Referring to Figures 12 and 13, the top of the second polymer molding chamber 31 is provided with a first feeding chamber 311 and two second feeding chambers 312. The first feeding chamber 311 is located in the middle of the second feeding chambers 312. The first feeding chamber 311 contains fluff pulp, and the second feeding chambers 312 contain sap. The first feeding chamber 311 is provided with a first feeding port 313. The cross-section of the first feeding port 313 is an isosceles trapezoidal structure. The fluff pulp in the middle of the first feeding port 313 falls vertically and mainly falls onto the first tank 3301. The fluff pulp on both sides falls obliquely in the lateral direction and mixes with the sap on both sides, mainly falling onto the second tank 3302. The sap on the outer side of the second feeding port 314 falls vertically and mainly falls onto the second tank 3302. The sap on the inner side falls obliquely in the lateral direction and mixes with the fluff pulp in the middle, mainly falling onto the first tank 3301. The content of fluff pulp is the same at all positions in the first tank 3301, and the content of sap gradually increases along both sides. The content of sap is the same at all positions in the second tank 3302, and the content of fluff pulp gradually increases along the inner side. The second polymer layer 112 includes a flow guiding part 1121 located in the flow guiding groove 113 and liquid absorption parts 1122 provided on both sides of the flow guiding part 1121.

[0078] Because of the good absorbency of SAP and the good diffusion properties of fluff pulp, the diversion part 1121 has a better diversion effect. The large gaps between the polymers in the diversion part 1121 can increase the infiltration rate of feces and provide a large buffer space for feces. The absorbency of the diversion part 1121 gradually increases along both sides, and has a certain liquid absorption effect. The liquid absorption part 1122 has a better liquid absorption effect and can absorb a large amount of liquid. The diversion effect of the liquid absorption part 1122 gradually decreases along the outer side. The urine diffuses further outward on the liquid absorption part 1122, and its diversion effect becomes worse, which has a good anti-leakage effect. In this structure, the urine in the entire lower core 11 is mainly absorbed on both sides, while the middle part mainly plays the role of diversion and feces absorption, thus better realizing the separation of urine and feces.

[0079] The extension lines of the two hypotenuses of the isosceles trapezoidal structure of the first discharge port 313 can be extended to the outer ends of the two second tanks 3302, so that the fluff pulp can cover the entire lower core 11. The right-angled trapezoidal hypotenuse of the second discharge port 314 can be extended to the middle of the first tank 3301, so that the sap can cover the entire lower core 11, thereby improving the liquid guiding and liquid absorption effect of the lower core 11.

[0080] The core body 1 of the present invention can be used in diapers, pull-up pants, sanitary napkins or other disposable hygiene products.

[0081] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

A core for urine and faeces zoned absorption, characterized in that The core body comprises a core body main body, the core body main body comprises a lower layer core body, two urine core bodies arranged on the top of the lower layer core body respectively, a wrapping layer wrapping the lower layer core body and the urine core bodies, the two urine core bodies are arranged along the length direction, the two urine core bodies are arranged on the two sides of the lower layer core body respectively, a liquid passage is formed between the two urine core bodies, the width of the liquid passage is not less than 2 cm, and the urine core body comprises a first non-woven fabric and a first polymer layer arranged in combination. A core for urine and faeces zoned absorption according to claim 1, characterized in that The first polymer layer is located below the first non-woven fabric. A core for urine and faeces zoned absorption according to claim 1, characterized in that The volume of the polymer particles of the urine core body is smaller than the volume of the polymer particles of the lower layer core body, the liquid absorption speed of the urine core body is greater than the liquid absorption speed of the lower layer core body, and the secondary liquid absorption effect of the lower layer core body is better than the secondary liquid absorption effect of the urine core body. A core for urine and faeces zoned absorption according to claim 1, characterized in that The inner side of the urine core body is in a wave shape. A core for urine and faeces zoned absorption according to claim 1, characterized in that The thickness of the lower layer core body is at least 2.5 times the thickness of the urine core body. A core for urine and faeces zoned absorption according to claim 1, characterized in that The thickness of the middle part of the lower layer core body is smaller than the thickness of the two sides, and a V-shaped flow guide groove is formed on the top of the lower layer core body or the top of the middle part of the lower layer core body. A core for urine and faeces zoned absorption according to claim 6, characterized in that One end of the urine core body extends above the flow guide groove. A production process of a core for urine and feces zoned absorption according to claim 1, characterized in that: The method comprises the following steps: S1. Urine core body forming: the first polymer material feeding device comprises a first polymer forming bin, a first shell arranged at the bottom of the first polymer forming bin, a first mold wheel rotatably arranged in the first shell, a first driving device for driving the rotation of the first mold wheel, a first feeding port arranged at the top of the first shell, a first discharging port arranged at the bottom of the first shell, a plurality of first mold grooves arranged on the first mold wheel, and first polymer material in the first polymer material feeding device falling from the first feeding port to the first mold wheel, part of the first polymer material directly falling into the first mold groove, and another part of the first polymer material sliding along the surface of the first mold wheel into the first mold groove. When the first mold groove rotates to the first discharging port, the first mold groove sprinkles the first polymer material from the first discharging port onto the first non-woven fabric to form a first polymer layer on the first non-woven fabric, and the first non-woven fabric and the first polymer layer form a urine core body. S2. Lower core forming: The second polymer feeding device comprises a second polymer forming bin, a second shell arranged at the bottom of the second polymer forming bin, a second mold wheel rotatably arranged in the second shell, a second driving device for driving the rotation of the second mold wheel, a second feeding port arranged at the top of the second shell, a second discharging port arranged at the bottom of the second shell, a plurality of second mold grooves arranged on the second mold wheel, the second mold groove comprising a first groove body arranged at the middle and a second groove body arranged at both ends, the cross-sectional area of the first groove body gradually increasing from the middle to both ends, the second polymer material falling from the second feeding port to the second mold wheel, part of the second polymer material directly falling into the second mold groove, and another part of the second polymer material sliding from the surface of the second mold wheel into the second mold groove, the second mold groove falling into the second discharging port, the second mold groove falling from the second discharging port to the second non-woven fabric, forming a second polymer layer on the second non-woven fabric, the second polymer material of the first groove body falling on the second non-woven fabric gradually increasing from the middle to both ends, so that the middle of the top surface of the second polymer layer forms a V-shaped groove, and then another layer of second non-woven fabric is compounded to the second polymer layer to form a lower core, the lower core comprising the second non-woven fabric, the second polymer layer, and the second non-woven fabric compounded from top to bottom; S3. Urine core cutting and separation: The urine core is flipped 180 degrees by the flipping device, so that the first polymer layer is located below the first non-woven fabric, the middle part of the urine core is cut by the first cutter device to form two pieces of urine core, and the two pieces of urine core are separated by a distance by the guide device; S4. Compounding: The two pieces of urine core are compounded to the lower core by the compounding roller device to form a core body, and a liquid passage is formed between the two pieces of urine core. A process for producing a core for urine and faeces zoned absorption according to claim 8, characterized in that: S5. Wrapping the core: The wrapping device wraps the core with a wrapping layer to form a core body. A process for producing a core for urine and faeces zoned absorption according to claim 8, characterized in that: The guide device comprises a plurality of guide rollers, the guide rollers are provided with annular baffles on both sides, the two pieces of urine core are transported between the two baffles, and the two pieces of urine core move outwardly through the baffles of the plurality of guide rollers.

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