A half-core structure with internal flow guiding channels

Abstract

The utility model discloses a half core structure with internal flow guide channel belongs to sanitary material technical field, including folding absorption layer, lower absorption layer, the folding absorption layer, lower absorption layer outside together with the wrapping layer of wrapping, the folding absorption layer both sides are all folded upwards and form the folding part, and the upper flow guide groove is formed in folding absorption layer top between two folding parts, is equipped with several flow guide parts along the upper flow guide groove extension in the upper flow guide groove, the lower absorption layer top is equipped with the main flow guide groove along the length direction extension, and the main flow guide groove is located below the upper flow guide groove, and the both ends of main flow guide groove length direction are equipped with at least one vice flow guide groove extending towards the lower absorption layer edge, flow guide part is equipped with the flow guide hole along the length direction through the both ends of flow guide part, and the surface of flow guide part is equipped with several micropore extending to the inside of flow guide hole, and the half core structure of the utility model makes liquid realize fast, evenly directional diffusion through flow guide channel.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products technology, specifically to a semi-core structure with an internal flow channel. Background Technology

[0002] Disposable diapers, pull-ups, and sanitary napkins are common absorbent products used to absorb bodily waste or menstrual blood. Consumers pay close attention to their absorption efficiency and the dryness after absorption. The product's ability to guide liquid flow significantly impacts its absorption efficiency. Currently, some absorbent products utilize flow channels and other structures to improve the flow and diffusion path of liquid, allowing for more even distribution and thus increasing absorption efficiency. However, absorbent products often bend into a U-shape during use, and the flow channels are generally too large to create a capillary effect. The channels fail to facilitate liquid diffusion from near the center of the absorbent core to near the front and back waistlines. Instead, the liquid, under its own weight, flows along the channels and accumulates at the lower part of the absorbent product, near the center. This leads to localized saturation of the absorbent material, forcing the liquid to diffuse only through the capillary structure of the non-woven fabric.

[0003] Based on the above, Chinese patent document CN221556347U discloses a novel quick-drying pull-up trousers, including an absorbent body and an outer layer. The outer layer has a front waist area, a back waist area, and an absorbent area. The transverse sides of the front waist area and the back waist area are fixedly welded. The longitudinal outer edges of the front waist area and the longitudinal outer edges of the back waist area both have anti-binding structures. The absorbent body includes a liquid-permeable surface layer, an absorbent core layer, and a liquid-impermeable bottom layer. The absorbent core layer includes an upper non-woven fabric, a bulky non-woven fabric, and a lower non-woven fabric. The upper and lower surfaces of the bulky non-woven fabric are respectively provided with superabsorbent polymer particles. A first superabsorbent polymer particle is provided between the upper non-woven fabric and the bulky non-woven fabric, and a second superabsorbent polymer particle is provided between the lower non-woven fabric and the bulky non-woven fabric. A guide groove is pressed on the absorbent core layer, which includes a longitudinal guide part and a diversion part.

[0004] The aforementioned patent document discloses a pull-up diaper that guides urine diffusion through a channel. The channel extends longitudinally, from the center of the diaper towards the front and back waistbands. However, the diaper is not laid flat during use but has a U-shaped structure. The user's urine tends to concentrate near the center of the diaper. Since the center of the diaper is located at the lower part of the U-shape, urine tends to accumulate at this lower position. The channel does not effectively create a capillary effect on the urine, thus failing to promote urine diffusion from the lower position to the higher position. In actual use, the pull-up diaper cannot effectively promote urine diffusion through the channel. Therefore, the pull-up diaper disclosed in this patent document still has room for improvement. Utility Model Content

[0005] To address the technical deficiencies in the background technology, this utility model proposes a semi-core structure with an internal flow guiding channel, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows: A semi-core structure with an internal flow channel includes a folded absorption layer and a lower absorption layer. The folded absorption layer and the lower absorption layer are arranged sequentially along the thickness direction of the semi-core structure. The outer sides of the folded absorption layer and the lower absorption layer are jointly wrapped by a wrapping layer. Both sides of the folded absorption layer in the width direction are folded upward to form folded portions. An upper flow channel extending along the length direction is formed at the top of the folded absorption layer between two folded portions. The upper flow channel is provided with a plurality of flow channels extending along the upper flow channel. The top of the lower absorption layer is provided with a main flow channel extending along the length direction. The main flow channel is located below the upper flow channel. At least one secondary flow channel extending toward the edge of the lower absorption layer is provided at both ends of the main flow channel along the length direction. The flow guide section is provided with flow guide holes that extend through both ends of the flow guide section along the length direction, and the surface of the flow guide section is provided with a number of micropores extending into the flow guide holes.

[0006] As a further technical solution of this utility model, both ends of the flow guide section penetrate downward through the folded absorption layer and extend to the upper surface of the lower absorption layer, and several flow guide sections are evenly distributed inside each flow guide groove.

[0007] As a further technical solution of this utility model, the upper guide channel is provided with a partition layer extending along the length direction. The partition layer divides the upper guide channel into two partition channels. The partition layer forms partition channels on both sides of the width direction and between the two folded parts. Each partition channel is provided with at least one guide part.

[0008] As a further technical solution of this utility model, two secondary guide channels are provided at both ends of the main flow channel in the length direction, and the two secondary guide channels located at the same end in the length direction of the main flow channel are respectively located on both sides of the width direction of the main flow channel. The guide section in any one of the partition grooves extends at both ends along its length into two secondary guide grooves located on the same side of the width direction of the main guide groove.

[0009] As a further technical solution of this utility model, when a secondary guide channel is provided at any end of the main flow channel, the included angle between the main flow channel and the secondary guide channel is 180°.

[0010] As a further technical solution of this utility model, when two or more secondary guide channels are provided at any end of the main flow channel, the included angle between any one of the secondary guide channels and the main flow channel is 90°~180°, and the included angle between two adjacent secondary guide channels is 1°~180°.

[0011] As a further technical solution of this utility model, the separator layer is provided with a plurality of diffusion holes penetrating both sides of the width direction of the separator layer, and the surface of the separator layer is provided with a plurality of micropores extending into the diffusion holes.

[0012] As a further technical solution of this utility model, the flow guiding part is composed of several bundled strips, which are formed by several bundled and fixed flow guiding fibers. The several bundled strips in the flow guiding part extend spirally along the axis of the flow guiding part, so that flow guiding holes are formed between the several bundled strips.

[0013] As a further technical solution of this utility model, the bottom of both the main flow channel and the secondary flow channel are provided with a number of permeation holes that extend to the bottom of the lower absorption layer.

[0014] The beneficial effects of this utility model are as follows: This invention discloses a semi-core structure that guides the directional diffusion of liquid through an internal flow channel. This semi-core structure mainly serves as the internal structure for absorbing liquid in an absorbent product. The upper flow channel and the flow guide section together form a flow channel that promotes the directional diffusion of liquid within the semi-core structure. This flow channel can promote the diffusion of liquid accumulated at a lower position to a higher position through capillary effect and be absorbed by the folded absorption layer and the lower absorption layer. The flow guide holes inside the flow guide section can quickly replenish the capillary structure of the bundled strip by drawing liquid through capillary effect, thereby increasing the speed of liquid diffusion. The semi-core structure of this invention enables the liquid to diffuse rapidly and uniformly in a directional manner through the flow channel, which can avoid clumping caused by local saturation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first embodiment of a semi-core structure with an internal flow channel.

[0016] Figure 2 This is a top view of the lower absorption layer of a first embodiment of a semi-core structure with internal flow channels.

[0017] Figure 3 This is a schematic diagram of a flow guide section with an internal flow guide channel.

[0018] Figure 4 This is a schematic diagram of a second embodiment of a semi-core structure with an internal flow channel.

[0019] Figure 5 This is a top view of the lower absorption layer of a second embodiment of a semi-core structure with internal flow channels.

[0020] Wherein: 1-Folded absorption layer, 11-Folded part, 12-Upper guide groove, 13-Separation layer, 14-Separation groove, 2-Lower absorption layer, 21-Main guide groove, 22-Secondary guide groove, 23-Permeation hole, 3-Wrapping layer, 4-Guide part, 41-Guide hole, 42-Bundling strip. Detailed Implementation

[0021] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0022] A semi-core structure with an internal flow channel includes a folded absorption layer 1 and a lower absorption layer 2. The folded absorption layer 1 and the lower absorption layer 2 are arranged sequentially along the thickness direction of the semi-core structure. The outer sides of the folded absorption layer 1 and the lower absorption layer 2 are jointly wrapped by a wrapping layer 3. Both sides of the folded absorption layer 1 in the width direction are folded upward to form folded parts 11. Between the two folded parts 11, an upper flow channel 12 extending along the length direction is formed at the top of the folded absorption layer 1. The upper flow channel 12 is provided with a plurality of flow channels 4 extending along the upper flow channel 12. The top of the lower absorption layer 2 is provided with a main flow channel 21 extending along the length direction. The main flow channel 21 is located below the upper flow channel 12. At both ends of the main flow channel 21 along the length direction, there is at least one secondary flow channel 22 extending toward the edge of the lower absorption layer 2. The guide section 4 is provided with guide holes 41 that penetrate both ends of the guide section 4 along the length direction. The surface of the guide section 4 is provided with a number of micropores that extend into the guide holes 41. Both ends of the guide section 4 in the length direction penetrate downward through the folded absorption layer 1 and extend to the upper surface of the lower absorption layer 2. A number of guide sections 4 are evenly distributed inside each guide groove 22.

[0023] This utility model discloses a semi-core structure that guides the directional diffusion of liquid through an internal flow channel. The semi-core structure is mainly used as an internal structure for absorbing liquids in absorbent products such as diapers and pull-ups. (Refer to...) Figure 1, Figure 2 In a first preferred embodiment of this utility model, the semi-core structure mainly consists of a folded absorbent layer 1, a lower absorbent layer 2, a wrapping layer 3 that encloses both the folded absorbent layer 1 and the lower absorbent layer 2, and a flow guiding part 4. The folded absorbent layer 1 adopts a full-core structure, with superabsorbent polymer (SAP) as the filling material for absorbing liquid, and the SAP is wrapped and fixed to the outside by meltblown nonwoven fabric. The lower absorbent layer 2 adopts a wood pulp cotton core structure, with a mixture of fluff pulp and SAP used to absorb liquid. The filling material, and the weight of fluff pulp in the mixture of fluff pulp and superabsorbent polymer is greater than 50%, and the outside of the mixture of fluff pulp and superabsorbent polymer is wrapped and fixed with dust-free paper; the wrapping layer 3 is made of hot air non-woven fabric. After the folded absorbent layer 1 and the lower absorbent layer 2 are stacked up and down in the thickness direction, the wrapping layer 3 wraps the folded absorbent layer 1 and the lower absorbent layer 2 together inside. The wrapping layer 3, together with the folded absorbent layer 1 and the lower absorbent layer 2, forms a semi-core structure. The weight ratio of the folded absorbent layer 1 to the lower absorbent layer 2 is about 1:1. The meltblown nonwoven fabric and the internal superabsorbent polymer are folded upwards on both sides of the width direction of the folded absorbent layer 1. The upward folded part forms a folded part 11 and covers the top of the folded absorbent layer 1. The two folded parts 11 form an upper guide groove 12 extending along the length direction of the folded absorbent layer 1 at the center of the top of the folded absorbent layer 1. The top of the lower absorbent layer 2 forms a main guide groove 21 and a secondary guide groove 22 by means of hot pressing, etc. Neither the main guide groove 21 nor the secondary guide groove 22 extends to the edge of the lower absorbent layer 2. The lower absorbent layer 2 is located at the bottom of the folded absorbent layer 1. The upper guide groove 12 and the main guide groove 21 are distributed vertically and are matched with each other in the thickness direction of the semi-core structure. Reference Figure 1 , Figure 2 , Figure 3 The semi-core structure mainly guides the directional diffusion of liquid through several guide sections 4. The guide section 4 has a long strip shape. The main structure of the guide section 4 is embedded in the upper guide groove 12. By setting through holes at the bottom of the upper guide groove 12 near the two ends of the folded absorption layer 1 along the length direction, the two ends of the guide section 4 can extend downward into the secondary guide groove 22 through the through holes. The through holes are usually located above the intersection of the main guide groove 21 and the secondary guide groove 22. Several guide sections 4 enter the secondary guide groove 22 at the intersection of the main guide groove 21 and the secondary guide groove 22. The ends of these guide sections 4 extend to the ends of the secondary guide groove 22 away from the main guide groove 21. It should be noted that the flow guiding part 4 is composed of several bundled strips 42, which are formed by several bundled and fixed flow guiding fibers. The bundled strips 42 in the flow guiding part 4 extend spirally along the axis of the flow guiding part 4, and flow guiding holes 41 are formed between the bundled strips 42. The bundled strips 42 are made of hydrophilic natural fibers such as cotton and linen or hydrophilic synthetic fibers such as hydrophilic polyester and hydrophilic acrylic. The fibers are twisted based on a medium and low twist coefficient and are formed by single yarn Z twist to form a medium and low twist bundled strip 42, so that several capillary structures extending spirally along their own axis are formed inside the bundled strip 42. When the bundled strip 42 comes into contact with the liquid, it can promote the diffusion of the liquid along the extension direction of the bundled strip 42 through the rich capillary structure inside. Furthermore, the diameter of the bundled strips 42 is 0.1~0.2mm. Regarding the formation of the guide section 4, a metal wire with a diameter of 0.1~0.2mm can be used. Several bundled strips 42 are spirally wound around the outside of the metal wire, with the metal wire as the center. Then, the bundled strips 42 wound around the outside of the metal wire are fixed together by means of adhesive application. Finally, the metal wire is pulled out. The bundled strips 42 together form the guide section 4. After the metal wire is pulled out and the bundled strips 42 are relaxed, the original position of the metal wire is in the guide section. A channel with a diameter of less than 0.1 mm is formed inside the flow section 4. This channel is the flow guide hole 41. The gap between the fibers inside the bundle strip 42 serves as a micropore on the surface of the flow guide section 4. When the flow guide section 4 comes into contact with the liquid, the bundle strip 42 uses hydrophilic fibers to allow the liquid to be absorbed into the bundle strip 42 and the flow guide hole 41 through these micropores. The abundant capillary structure inside promotes the diffusion of the liquid along the extension direction of the flow guide section 4. The flow guide hole 41 also promotes the diffusion of the liquid along the extension direction of the flow guide section 4 through capillary effect. Furthermore, after several flow guides 4 are disposed inside the upper flow guide groove 12, many channels extending along the length of the semi-core structure are formed between adjacent flow guides 4 and between the flow guides 4 and the sides or bottom of the upper flow guide groove 12. These channels can also promote the diffusion of liquid through capillary effect. The upper flow guide groove 12 and the flow guides 4 cooperate to form a richer and more stable capillary structure on the top of the folded absorption layer 1, which is conducive to the more stable diffusion of liquid along the extension direction of the upper flow guide groove 12. It should be noted that, due to the large diameter of the guide hole 41, the capillary effect it produces on the liquid is weak and cannot allow the liquid to diffuse to the end of the guide section 4 in the length direction. The capillary height of the liquid in the guide hole 41 is usually 50~60mm. However, as the liquid diffuses along the bundle bar 42, it will be gradually absorbed by the folded absorption layer 1. At this time, the liquid inside the guide hole 41 can quickly replenish the capillary structure inside the bundle bar 42, increasing the speed at which the liquid diffuses to the end of the guide section 4 in the length direction.

[0024] After the semi-core structure of this utility model is set inside the absorbent product, the folded absorbent layer 1 is located on the side closer to the surface layer of the absorbent product. That is, during the use of the absorbent product, the folded absorbent layer 1 is located on the side closer to the human body. The urine excreted by the human body passes through the surface layer and the wrapping layer 3 of the absorbent product in sequence and then comes into contact with the folded absorbent layer 1. Since the upper guide groove 12 is located in the center of the folded absorbent layer 1, most of the urine will accumulate at the position of the upper guide groove 12. After the guide part 4 adopts the above structure, even if the absorbent product is bent during use and the upper guide groove 12 becomes U-shaped, the guide part 4 can still allow the urine to pass through. The capillary effect promotes the diffusion of liquid along the extension direction of the guide section 4, that is, it promotes the diffusion of urine from the low position to the high position of the absorbent product along the extension direction of the upper guide groove 12. During the process of urine diffusion promoted by the guide section 4, the parts of the folded part 11 located on both sides of the upper guide groove 12 and the parts of the folded absorbent layer 1 located at the bottom of the upper guide groove 12 gradually absorb the urine diffused along the guide section 4 by contacting the guide section 4, so that the urine accumulated at the low position of the absorbent product is quickly diffused and absorbed into the absorbent material inside the semi-core structure, avoiding the phenomenon of local saturation in the semi-core structure. Furthermore, in commonly used semi-core structures, liquid is usually preferentially absorbed by the upper core. The liquid needs to penetrate the upper core and permeate downwards before it can be absorbed by the lower core. Therefore, during the liquid absorption process of this semi-core structure, the upper core usually becomes saturated earlier, resulting in local saturation of the entire semi-core structure. Moreover, the saturation of the upper core affects the efficiency of liquid permeation downwards. In this invention, the liquid diffuses into the interior of the secondary guide channel 22 through the downward extending portion of the guide section 4. At this time, the lower absorption layer 2 can absorb the liquid through the portion near the secondary guide channel 22. Meanwhile, if too much liquid diffuses into the secondary guide channel 22 through the guide section 4, the liquid that is not absorbed by the lower absorption layer 2 can flow towards the center of the lower absorption layer 2 along the main guide channel 21 at the intersection of the secondary guide channel 22 and the main guide channel 21. It should be noted that the lower absorbent layer 2 is located on the side of the absorbent product furthest from the human body, while the parts of the lower absorbent layer 2 near the secondary guide channel 22 are located at both ends of the length of the lower absorbent layer 2. This part is in a high position during the use of the absorbent product and is usually the last part to become saturated during the liquid absorption process. When this part becomes saturated, the absorbent product is usually already in a completely saturated state and can hardly absorb any more liquid. Since the water-absorbing material expands after absorbing liquid, it will have a certain obstruction effect on the penetration and diffusion of the liquid. It takes a long time for the liquid to diffuse to the part of the lower absorbent layer 2 near the secondary guide channel 22. When the guide section 4 is set inside the upper core structure, the guide section 4 forms a directional path that promotes the diffusion of liquid inside the half-core structure. The liquid can diffuse to the part of the lower absorbent layer 2 near the secondary guide channel 22 with high efficiency in a short time. During the use of the absorbent product, the liquid can be absorbed by the low and high positions of the half-core structure at the same time, so that the liquid is absorbed efficiently and evenly distributed inside the half-core structure, avoiding clumping and other phenomena caused by local saturation.

[0025] As a second preferred embodiment of the present invention, the upper guide channel 12 is provided with a partition layer 13 extending along the length direction, the partition layer 13 divides the upper guide channel 12 into two partition channels 14, and the partition layer 13 forms partition channels 14 between the two sides of the width direction and the two folded parts 11. Each partition channel 14 is provided with at least one guide part 4; two secondary guide channels 22 are provided at both ends of the main guide channel 21 along the length direction, and the two secondary guide channels 22 located at the same end of the main guide channel 21 along the length direction are respectively located on both sides of the main guide channel 21 along the width direction; the two ends of the guide part 4 in any partition channel 14 along the length direction extend into the two secondary guide channels 22 located on the same side of the main guide channel 21 along the width direction; A wider upper guide channel 12 needs to be provided at the top of the folded absorption layer 1 so that a partition layer 13 can be set inside the upper guide channel 12, and the upper guide channel 12 can hold more liquid. The partition layer 13 is made of multi-layer composite spunlace nonwoven fabric, and its internal fibers mainly extend along the width direction of the upper guide channel 12. The partition layer 13 divides the upper guide channel 12 into two partition channels 14 distributed along the width direction. The partition layer 13 absorbs liquid through good hydrophilicity and promotes the diffusion of liquid inside the upper guide channel 12 along the width direction to the guide part 4 in the partition channel 14. The two partition channels 14 and the internal guide part 4 form two independent guide channels at the top of the folded absorption layer 1 that can promote liquid diffusion. Compared with a single upper guide channel 12 and guide part 4 forming a single guide channel, the two guide channels can improve the efficiency of liquid diffusion. Furthermore, the two guide channels can respectively promote the diffusion of liquid to the secondary guide channel 22 located on the same side of the width direction of the main guide channel 21 in the lower absorption layer 2, which can enable the liquid to achieve a more precise and uniform distribution. It should be noted that the partition layer 13 has several diffusion holes that penetrate both sides of the width direction of the partition layer 13, and the surface of the partition layer 13 has several micropores that extend into the diffusion holes. The diffusion holes are capillary structures between the fibers inside the partition layer 13 along the fiber extension direction, while the micropores on the surface of the partition layer 13 are gaps between the fibers perpendicular to the fiber extension direction. Both the diffusion holes and the micropores are formed during the manufacturing process of the partition layer 13. The diffusion holes and the micropores together form the capillary structure inside the partition layer 13. The micropores are mainly used to allow the partition layer 13 to absorb liquid into the interior, while the diffusion holes are mainly used to promote the diffusion of the liquid inside along the width direction.

[0026] Furthermore, the lower absorber layer 2 can be provided with different numbers of secondary guide channels 22 at the end of the main flow channel 21 according to the different performance requirements of the semi-core structure. When a secondary guide channel 22 is provided at any end of the main flow channel 21, the included angle between the main flow channel 21 and the secondary guide channel 22 is 180°. At this time, the main flow channel 21 and the secondary guide channel 22 are located on the same straight line, and the width of the secondary guide channel 22 is wider, so that the flow guide 4 can be more evenly dispersed inside the secondary guide channel 22, and the liquid diffused by the flow guide 4 can be better diffused in the secondary guide channel 22. Furthermore, when two or more secondary guide channels 22 are provided at any end of the main flow channel 21, the angle between any secondary guide channel 22 and the main flow channel 21 is 90°~180°, and the angle between two adjacent secondary guide channels 22 is 1°~180°. When two secondary guide channels 22 are provided at any end of the main flow channel 21 and the angle between the two secondary guide channels 22 is 180°, the main flow channel 21 and the secondary guide channels 22 together form an I-shaped groove structure on the surface of the lower absorption layer 2. When the angle between the two secondary guide channels 22 is less than 180°, the main flow channel 21 and the secondary guide channels 22 together form a fishbone groove structure on the surface of the lower absorption layer 2. The I-shaped groove structure and the fishbone groove structure promote liquid diffusion in different directions, and different groove structures can give the semi-core structure different performance. When two or more secondary guide channels 22 are provided at any end of the main flow channel 21, multiple secondary guide channels 22 can promote liquid diffusion from more directions by cooperating with the guide part 4.

[0027] As one of the preferred embodiments of this utility model, refer to Figure 2 , Figure 5Both the main flow channel 21 and the secondary flow channel 22 have several permeation holes 23 extending to the bottom of the lower absorption layer 2. The permeation holes 23 can be formed by ultrasonic drilling of the bottom of the main flow channel 21 and the secondary flow channel 22. The permeation holes 23 can promote the rapid downward permeation of the liquid inside the main flow channel 21 or the secondary flow channel 22 to the bottom of the lower absorption layer 2. This liquid can diffuse through the wrapping layer 3 located at the bottom of the lower absorption layer 2, so that the liquid can come into more full contact with the lower absorption layer 2, improve the uniformity of liquid diffusion in the lower absorption layer 2, and help improve the efficiency of liquid absorption by the lower absorption layer 2.

[0028] In summary, this utility model discloses a semi-core structure that guides the directional diffusion of liquid through an internal flow channel. This semi-core structure mainly serves as a liquid absorption structure inside an absorbent product. The upper flow channel 12 and the flow guide 4 together form a flow channel that promotes the directional diffusion of liquid within the semi-core structure. This flow channel can promote the diffusion of liquid accumulated at a lower position to a higher position through capillary effect and be absorbed by the folded absorbent layer 1 and the lower absorbent layer 2. The liquid drawn by the flow guide hole 41 inside the flow guide 4 through capillary effect can quickly replenish the capillary structure inside the bundle bar 42, increasing the speed of liquid diffusion. The semi-core structure of this utility model enables the liquid to diffuse rapidly and uniformly through the flow channel, which can avoid clumping caused by local saturation.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A semi-core structure with an internal flow channel, comprising a folded absorption layer (1) and a lower absorption layer (2), characterized in that, The folded absorption layer (1) and the lower absorption layer (2) are arranged sequentially along the thickness direction of the semi-core structure. The outer sides of the folded absorption layer (1) and the lower absorption layer (2) are wrapped with a wrapping layer (3). Both sides of the folded absorption layer (1) in the width direction are folded upward to form folded parts (11). Between the two folded parts (11), an upper guide groove (12) extending along the length direction is formed at the top of the folded absorption layer (1). The upper guide groove (12) is provided with several guide parts (4) extending along the upper guide groove (12). The lower absorption layer (2) has a main flow channel (21) extending along the length direction at the top. The main flow channel (21) is located below the upper flow channel (12). At least one secondary flow channel (22) extending toward the edge of the lower absorption layer (2) is provided at both ends of the main flow channel (21) along the length direction. The guide section (4) is provided with guide holes (41) that run through both ends of the guide section (4) along the length direction, and the surface of the guide section (4) is provided with a number of micropores extending into the guide holes (41).

2. The semi-core structure with an internal flow channel according to claim 1, characterized in that, Both ends of the guide section (4) extend downward through the folded absorption layer (1) and extend to the upper surface of the lower absorption layer (2) in the length direction. Several guide sections (4) are evenly distributed inside each guide groove (22).

3. The semi-core structure with an internal flow channel according to claim 1, characterized in that, The upper guide channel (12) is provided with a partition layer (13) extending along the length direction. The partition layer (13) divides the upper guide channel (12) into two partition channels (14). The partition layer (13) forms a partition channel (14) on both sides of the width direction with the two folded parts (11). Each partition channel (14) is provided with at least one guide part (4).

4. The semi-core structure with an internal flow channel according to claim 3, characterized in that, Two secondary guide channels (22) are provided at both ends of the main flow channel (21) in the length direction. The two secondary guide channels (22) located at the same end in the length direction of the main flow channel (21) are located on both sides of the width direction of the main flow channel (21). The guide section (4) in any of the partition grooves (14) extends at both ends in the length direction to two secondary guide grooves (22) located on the same side in the width direction of the main guide groove (21).

5. The semi-core structure with an internal flow channel according to claim 1, characterized in that, When a secondary guide channel (22) is provided at any end of the main flow channel (21), the included angle between the main flow channel (21) and the secondary guide channel (22) is 180°.

6. The semi-core structure with an internal flow channel according to claim 1, characterized in that, When two or more secondary guide channels (22) are provided at any end of the main flow channel (21), the included angle between any one of the secondary guide channels (22) and the main flow channel (21) is 90°~180°, and the included angle between two adjacent secondary guide channels (22) is 1°~180°.

7. The semi-core structure with an internal flow channel according to claim 3, characterized in that, The partition layer (13) has a plurality of diffusion holes that penetrate both sides of the width direction of the partition layer (13), and the surface of the partition layer (13) has a plurality of micropores that extend into the diffusion holes.

8. The semi-core structure with an internal flow channel according to claim 1, characterized in that, The flow guide (4) is composed of several bundled strips (42), which are formed by several bundled and fixed flow guide fibers. The bundled strips (42) in the flow guide (4) extend spirally along the axis of the flow guide (4) and form flow guide holes (41) between the bundled strips (42).

9. The semi-core structure with an internal flow channel according to claim 1, characterized in that, The bottom of both the main flow channel (21) and the secondary flow channel (22) is provided with several permeation holes (23) that extend to the bottom of the lower absorption layer (2).

Images