A three-dimensional leakage-preventing side edge hot-pressing setting equipment and setting method for adult paper diapers

Abstract

The application discloses a kind of adult paper diaper three-dimensional leakage-proof separation edge hot-pressing setting equipment and setting method, it is related to absorbent article field, the setting method includes the following steps: S1, leakage-proof separation edge is sequentially divided into root area, middle area and edge area;S2, root area is hot-pressed;S3, middle area is hot-pressed;S4, edge area is hot-pressed;S5, the root area after hot-pressing, directional air cooling 12~20 s;S6, the middle area and edge area after hot-pressing, directional air cooling 22~28 s, obtain adult paper diaper three-dimensional leakage-proof separation edge.Through the setting mode of three-zone heterogeneous hot-pressing, leakage-proof separation edge is differentially treated, so that the separation edge can dynamically adjust the morphology according to the leg movement, real-time fit different body type curves, compared with the problem of global rigidity caused by traditional uniform hot-pressing, effectively reduce the gap when leg movement, thereby further reduce the risk of side leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of absorbent articles, in particular to paper diapers, and specifically to a hot-pressing setting equipment and setting method for a three-dimensional leakage-preventing barrier of an adult paper diaper. BACKGROUND

[0002] With the aggravation of population aging and the increase of incontinence care needs, adult paper diapers, as important sanitary products, their leakage-preventing performance is directly related to the health and safety of users and the dignity of life. The leakage-preventing barrier, as a key functional component of the paper diaper, mainly blocks the liquid side leakage path through three-dimensional structure design. Unlike baby paper diapers, adult users have significant differences in body size (leg span can reach 30-70 cm), and have a wide range of daily activities (such as frequent turning over, sitting, walking, etc.), and generally have physiological characteristics such as weak skin barrier, subcutaneous tissue atrophy, and poor peripheral blood circulation, which puts higher requirements on the dynamic fit and structural durability of the leakage-preventing barrier.

[0003] As shown in Figure 1 The conventional leakage-preventing barrier is usually composed of multiple layers of composite materials, from the inside to the outside, in order: skin-friendly non-woven fabric layer 1 (such as polypropylene PP material), embedded elastic element 11 (such as polyurethane PU elastic cord), and waterproof barrier layer 12 (such as polyethylene PE microporous film), which are bonded and hot-pressed into one body.

[0004] In the prior art, the hot-pressing setting process of the leakage-preventing barrier generally uses a global uniform hot-pressing process, which shapes the barrier material by pressing it with a mold. For example, the traditional process often uses a flat or simple pattern mold to hot-press the barrier at a single temperature and pressure, and then completes the setting through natural cooling or air cooling. This processing method can achieve a basic three-dimensional structure, but uniform hot-pressing can easily cause the barrier material to be rigid throughout, with uniform and dense molecular chains, losing regional elasticity; when the adult's legs move, the material is difficult to adapt to the dynamic change in curvature, and a gap of >2mm is generally formed at the leg root wrinkle, causing night-time side leakage.

[0005] Therefore, it is necessary to improve the deficiencies in the prior art to solve the above problems. SUMMARY

[0006] The present application overcomes the deficiencies of the prior art and provides a hot-pressing setting equipment and setting method for a three-dimensional leakage-preventing barrier of an adult paper diaper.

[0007] To achieve the above purpose, the technical solution adopted by the present application is as follows: In a first aspect, the present application provides a hot-pressing setting method for a three-dimensional leakage-preventing barrier of an adult paper diaper, comprising the following steps:

[0008] S1, the leak-proof barrier edge is set as the inner side from the side close to the core body of the diaper, and is evenly divided into a root area, a middle area and an edge area from inside to outside;

[0009] S2, the root area is kept at 115-123 DEG C under a pressure of 0.8-1.2 MPa for 3-6 s;

[0010] S3, the middle area is kept at 100-105 DEG C under a pressure of 0.5-0.65 MPa for 2-4 s;

[0011] S4, the edge area is kept at 90-97 DEG C under a pressure of 0.35-0.4 MPa for 2-3 s;

[0012] S5, the root area after heat pressing is subjected to directional air cooling at a wind speed of 8-10 m / s and a distance of 20-30 cm for 12-20 s;

[0013] S6, the middle area and the edge area after heat pressing are both subjected to directional air cooling at a wind speed of 1-3 m / s and a distance of 40-50 cm for 22-28 s, to obtain the three-dimensional leak-proof barrier edge of the adult diaper.

[0014] In a preferred embodiment of the present application, the root area is heat-pressed and shaped by a shaping upper die and a shaping lower die with a continuous sawtooth groove structure having a groove depth of 1.6-3.5 mm.

[0015] In a preferred embodiment of the present application, the middle area is heat-pressed and shaped by a shaping upper die and a shaping lower die with a gentle wave shallow groove structure having a groove depth of 0.8-2 mm.

[0016] In a preferred embodiment of the present application, the edge area is heat-pressed and shaped by a shaping upper die and a shaping lower die with a smooth micro-arc surface structure having a curvature radius of 1.7-4 mm.

[0017] In a preferred embodiment of the present application, in the step S5, the cooling medium for directional air cooling of the root area is compressed air at 15-18 DEG C.

[0018] In a preferred embodiment of the present application, in the step S6, the cooling medium for directional air cooling of the middle area and the edge area is ambient air at 24-30 DEG C.

[0019] In a second aspect, the present application provides a shaping device for a heat-pressing and shaping method of a three-dimensional leak-proof barrier edge of an adult diaper, comprising: a device body, a placing and clamping mechanism arranged on the top of the device body for placing and clamping a diaper, and a plurality of linear guides mounted on the top of the device body for driving the placing and clamping mechanism to translate in a working position;

[0020] The top of the device body is fixed with a top plate through several support rods, and a root shaping mechanism, a middle shaping mechanism and an edge shaping mechanism are sequentially installed on the top plate along the direction of diaper advancing; the root shaping mechanism, the middle shaping mechanism and the edge shaping mechanism are all installed with air cooling components for directional air cooling to the diaper leakage prevention barrier on one side of the direction of diaper advancing;

[0021] The root shaping mechanism, the middle shaping mechanism and the edge shaping mechanism all comprise a pressing block arranged at the bottom of the top plate, a mold support fixed at the top of the device body and located at the bottom of the pressing block, and several heating strips fixed at the bottom of the pressing block; the bottom of the heating strip is fixed with a shaping upper die, the top of the mold support is fixed with a shaping lower die, and the top plate is installed with a power component for driving the pressing block to apply shaping pressure;

[0022] The cross-sectional structure of the shaping upper die and the shaping lower die in the root shaping mechanism is a continuous zigzag groove, the cross-sectional structure in the middle shaping mechanism is a gentle wave shallow groove, and the cross-sectional structure in the edge shaping mechanism is a smooth micro-arc surface.

[0023] In a preferred embodiment of the application, the placing and clamping mechanism comprises: at least two groups of translation frames; each group of translation frames comprises: several sliding blocks slidingly connected to the top of the linear guide rail, several fixed blocks fixed to the top of the sliding blocks, and a connecting plate fixed between the fixed blocks; one side of the fixed block is installed with an electric telescopic rod;

[0024] The output end of the electric telescopic rod is installed with a pressing strip between the output end of the electric telescopic rod of the adjacent translation frame, for clamping the front waist area or the back waist area of the diaper.

[0025] In a preferred embodiment of the application, the air cooling component comprises: a reverse T-shaped pipe installed at the bottom of the top plate, shunt pipes fixed at both ends of the bottom of the reverse T-shaped pipe, and several air outlet heads fixed at the bottom of the shunt pipes for blowing air to the root area or the middle area or the edge area of the leakage prevention barrier; the bottom of the top plate is fixed with several connecting rods, and the bottom of the connecting rods is fixed with the side surface of the reverse T-shaped pipe;

[0026] The top end of the reverse T-shaped pipe located on the upper surface of the top plate is installed with a gas delivery head for external connection of a gas delivery device; the gas delivery device externally connected to one side of the root shaping mechanism is used for delivering 15-18 ℃ compressed air to the gas delivery head; the gas delivery device externally connected to one side of the middle shaping mechanism and the edge shaping mechanism is used for delivering 24-30 ℃ ambient air to the gas delivery head.

[0027] In a preferred embodiment of the present application, the power assembly comprises a hydraulic cylinder mounted on the top of the top plate, and a translation plate fixed on the output end of the hydraulic rod at the bottom of the top plate; the two sides of the translation plate are slidably connected with the side surfaces of the support rods through sleeves, and the bottom of the translation plate is fixed with the top of the pressing block.

[0028] The present application solves the defects in the background art and has the following beneficial effects:

[0029] (1) The present application provides a hot-pressing shaping equipment and shaping method for a three-dimensional leakage-preventing barrier of an adult paper diaper, which differentiates the processing of the leakage-preventing barrier through a three-zone heterogeneous hot-pressing shaping method, the root zone is processed through high temperature and high pressure and a continuous zigzag groove formed thereby, so that the molecular chains of the material are closely arranged under directional pressure and form permanent plastic deformation, a rigid support foundation is established, the middle zone is processed through medium temperature and medium pressure and a gentle wave shallow groove structure, so that the molecular chains are partially cross-linked to form flexible hinges that can rebound, and the edge zone is processed through low temperature and low pressure and a smooth micro-arc surface, so that the original softness of the molecular chains is maintained, and the barrier can then dynamically adjust its shape according to the leg movement, and real-time fit different body curves, compared with the problem of global rigidity caused by traditional uniform hot-pressing, the gap during leg movement is effectively reduced, and thus the risk of side leakage is further reduced.

[0030] (2) In the present application, the continuous zigzag groove, the gentle wave shallow groove structure and the smooth micro-arc surface structure formed by the cooperation of the mold partitions can prevent the whole root from displacing when the leg moves, the elastic expansion of the wave shallow groove can compensate for the local curvature mutation, and the micro-arc surface can fill the microscopic gaps by fitting the skin wrinkles, and thus the barrier can dynamically adjust its shape according to the leg movement, and real-time fit different body curves, and can cooperatively reduce the gap during leg movement, and thus the risk of side leakage can be reduced.

[0031] (3) In the present application, the root zone is cooled by forced directional air cooling to rapidly cool down, so that the molecular chains are rapidly locked in orientation after high-temperature shaping, and rebound relaxation can be avoided, the middle and edge zones are cooled by mild convection cooling, so that internal stress can be slowly released, and the elastic recovery ability of the molecular chains can be maintained, and thus the shaped three-dimensional barrier can still maintain stable shape after wearing, movement and absorption core expansion, and has good anti-collapse ability, so that the structural durability of the barrier is significantly improved, and the long-term leakage prevention function is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0033] Figure 1 is a schematic diagram of the three-dimensional explosion structure of the prior art leak-proof spacer;

[0034] Figure 2 is a three-dimensional structure diagram of the shaping device of the preferred embodiment of the present application;

[0035] Figure 3 is a three-dimensional structure diagram of the root shaping mechanism of the preferred embodiment of the present application;

[0036] Figure 4 is a three-dimensional structure diagram of the middle shaping mechanism of the preferred embodiment of the present application;

[0037] Figure 5 is a three-dimensional structure diagram of the edge shaping mechanism of the preferred embodiment of the present application;

[0038] Figure 6 is a three-dimensional structure diagram of the placement and clamping mechanism of the preferred embodiment of the present application;

[0039] Figure 7 is a three-dimensional structure diagram of the air cooling assembly of the preferred embodiment of the present application;

[0040] Figure 8 is a side view structure diagram of the shaping device of the preferred embodiment of the present application;

[0041] In the figure: 1, skin-friendly non-woven fabric layer; 11, embedded elastic element; 12, waterproof barrier layer; 2, device body; 3, linear guide rail; 4, support rod; 5, top plate; 6, air cooling assembly; 61, inverted T-shaped pipe; 62, shunt pipe; 63, air outlet head; 64, connecting rod; 65, air conveying head; 7, pressing block; 71, mold support; 72, heating strip; 73, upper shaping mold; 74, lower shaping mold; 8, translation frame; 81, sliding block; 82, fixed block; 83, connecting plate; 84, electric telescopic rod; 85, pressing strip; 9, hydraulic cylinder; 91, translation plate. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0043] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description.

[0044] In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like refer to the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In the description of the present application, unless otherwise specified, the meaning of "several" is two or more.

[0045] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "setting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0046] A hot-pressing shaping method of a three-dimensional leakage-proof barrier of an adult paper diaper, comprising the following steps:

[0047] S1, the leakage-proof barrier is set as the inner side from the side close to the core body of the paper diaper, and is evenly divided into a root zone, a middle zone and an edge zone from inside to outside;

[0048] S2, the root zone is heated at 115-123 DEG C under a pressure of 0.8-1.2 MPa for 3-6 s;

[0049] S3, the middle zone is heated at 100-105 DEG C under a pressure of 0.5-0.65 MPa for 2-4 s;

[0050] S4, the edge zone is heated at 90-97 DEG C under a pressure of 0.35-0.4 MPa for 2-3 s;

[0051] S5, the root zone after hot-pressing is subjected to directional air cooling at a wind speed of 8-10 m / s and a distance of 20-30 cm for 12-20 s;

[0052] S6, the middle zone and the edge zone after hot pressing are subjected to directional air cooling at a wind speed of 1-3 m / s and a distance of 40-50 cm for 22-28 s to obtain the three-dimensional leakage-proof side edge of the adult paper diaper.

[0053] In some specific embodiments, the root zone is hot-pressed and shaped by the shaping upper mold 73 and the shaping lower mold 74 with a continuous sawtooth groove structure having a groove depth of 1.6-3.5 mm.

[0054] In some specific embodiments, the middle zone is hot-pressed and shaped by the shaping upper mold 73 and the shaping lower mold 74 with a gentle wave shallow groove structure having a groove depth of 0.8-2 mm.

[0055] In some specific embodiments, the edge zone is hot-pressed and shaped by the shaping upper mold 73 and the shaping lower mold 74 with a smooth micro-arc surface structure having a curvature radius of 1.7-4 mm.

[0056] In some specific embodiments, in the step of S5, the cooling medium for the directional air cooling of the root zone is compressed air at 15-18℃.

[0057] In some specific embodiments, in the step of S6, the cooling medium for the directional air cooling of the middle zone and the edge zone is ambient air at 24-30℃.

[0058] To further make the purposes and effects of the present application simple and easy to understand, the present application is further described in conjunction with the following specific examples and comparative examples, and the present application is not limited in the scope of the examples.

[0059] It should be noted that in the examples and comparative examples, the length of the leakage-proof side edge is 15 cm, the width is 6 cm, and the material composition is as follows: from the inside to the outside, 25 g / m 2 polypropylene skin-friendly non-woven fabric, embedded with polyurethane elastic rubber thread with a diameter of 0.8 mm, 15 μm thick polyethylene breathable microporous film, and three-layer structure by hot melt adhesive (coating amount 8 g / m 2 ). Example 1

[0060] A hot-pressing and shaping method of a three-dimensional leakage-proof side edge of an adult paper diaper, comprising the following steps:

[0061] S1, the leakage-proof side edge is defined as the inner side from the side close to the core body of the paper diaper, and is divided into a root zone with a width of 2 cm, a middle zone with a width of 2 cm, and an edge zone with a width of 2 cm from the inside to the outside;

[0062] S2, the root zone is subjected to hot pressing at 120℃ and a pressure of 1 MPa for 4 s to form a continuous sawtooth groove structure with a groove depth of 2.5 mm;

[0063] S3, the root area after hot pressing, with a wind speed of 9 m / s, a distance of 25 cm, spray 16 ℃ compressed air, directional air cooling for 15 s;

[0064] S4, the middle area at 103 ℃, with a pressure of 0.6 MPa, for 3 s, to form a groove depth of 1.2 mm gentle wave shallow groove structure;

[0065] S5, the middle area after hot pressing, with a wind speed of 2 m / s, a distance of 40 cm, blow 26 ℃ ambient air, directional air cooling for 25 s;

[0066] S6, the edge area at 94 ℃, with a pressure of 0.4 MPa, for 3 s, to form a curvature radius of 2.5 mm smooth micro-arc surface structure;

[0067] S7, the edge area after hot pressing, with the same directional air cooling as step S5, to obtain a three-dimensional leakage prevention edge of adult paper diaper. Example 2

[0068] This example is basically the same as example 1, the difference is that the hot pressing setting temperature of the root area is different, S2 step is: the root area is pressed at 115 ℃, with a pressure of 1 MPa, for 4 s, to form a continuous zigzag groove structure with a groove depth of 2.5 mm. Example 3

[0069] This example is basically the same as example 1, the difference is that the hot pressing setting temperature of the root area is different, S2 step is: the root area is pressed at 123 ℃, with a pressure of 1 MPa, for 4 s, to form a continuous zigzag groove structure with a groove depth of 2.5 mm. Example 4

[0070] This example is basically the same as example 1, the difference is that the hot pressing setting temperature of the middle area is different, S4 step is: the middle area is pressed at 100 ℃, with a pressure of 0.6 MPa, for 3 s, to form a gentle wave shallow groove structure with a groove depth of 1.2 mm. Example 5

[0071] This example is basically the same as example 1, the difference is that the hot pressing setting temperature of the middle area is different, S4 step is: the middle area is pressed at 105 ℃, with a pressure of 0.6 MPa, for 3 s, to form a gentle wave shallow groove structure with a groove depth of 1.2 mm. Example 6

[0072] The embodiment is basically the same as embodiment 1, the difference is that the heat pressing setting temperature of the edge area is different, and the S6 step is specifically: the edge area is kept at 90 DEG C under the pressure of 0.4 MPa for 3 s, and a smooth micro-arc surface structure with a curvature radius of 2.5 mm is formed. Example 7

[0073] The embodiment is basically the same as embodiment 1, the difference is that the heat pressing setting temperature of the edge area is different, and the S6 step is specifically: the edge area is kept at 97 DEG C under the pressure of 0.4 MPa for 3 s, and a smooth micro-arc surface structure with a curvature radius of 2.5 mm is formed.

[0074] Comparative example 1:

[0075] The comparative example is basically the same as embodiment 1, the difference is that there is no partition heat pressing, specifically including the following steps:

[0076] S1, the whole leak-proof barrier is kept at 120 DEG C under the pressure of 1 MPa for 4 s;

[0077] S2, the heat-pressed leak-proof barrier is sprayed with 16 DEG C compressed air at a wind speed of 9 m / s and a distance of 25 cm for 15 s of directional air cooling to obtain an adult paper diaper leak-proof barrier.

[0078] Comparative example 2:

[0079] The comparative example is basically the same as embodiment 1, the difference is that there is no root area with continuous zigzag groove structure, specifically, there is no S2 and S3 steps, and the S1 step is specifically: the leak-proof barrier is defined as the inner side from the side close to the paper diaper core body, and is divided into a 3 cm wide middle area and a 3 cm wide edge area from inside to outside.

[0080] Comparative example 3:

[0081] The comparative example is basically the same as embodiment 1, the difference is that there is no middle area with gentle wave shallow groove structure, specifically, there is no S4 and S5 steps, and the S1 step is specifically: the leak-proof barrier is defined as the inner side from the side close to the paper diaper core body, and is divided into a 3 cm wide root area and a 3 cm wide edge area from inside to outside.

[0082] Comparative example 4:

[0083] The comparative example is basically the same as embodiment 1, the difference is that there is no edge area with smooth micro-arc surface structure, specifically, there is no S6 and S7 steps, and the S1 step is specifically: the leak-proof barrier is defined as the inner side from the side close to the paper diaper core body, and is divided into a 3 cm wide root area and a 3 cm wide middle area from inside to outside.

[0084] Comparative example 5:

[0085] The comparative example is basically the same as Example 1, except that the root zone is subjected to the same directional air cooling as the middle and edge zones, and the S3 step is specifically: after hot pressing, the root zone is blown with 26℃ ambient air at a wind speed of 2 m / s and a distance of 40 cm for 25 s of directional air cooling.

[0086] Comparative Example 6:

[0087] The comparative example is basically the same as Example 1, except that the middle and edge zones are subjected to the same directional air cooling as the root zone, and specifically: after hot pressing, the middle and edge zones are sprayed with 16℃ compressed air at a wind speed of 9 m / s and a distance of 25 cm for 15 s of directional air cooling.

[0088] Performance testing: the leak-proof cuffs obtained in Examples 1-7 and Comparative Examples 1-6 were subjected to dynamic fitting and structural durability performance testing, respectively, and the results are shown in Table 1.

[0089] Dynamic fitting: the adult paper diaper with the composite leak-proof cuff was installed on an adjustable bionic leg model simulating the contour of an adult leg (leg circumference adjustment range 30~70 cm, surface covered with 5 mm thick silicone rubber simulating skin), and the leg model was set to perform flexion and extension movements at a frequency of 0.5 Hz (angle range 15°~90°). At the same time, a laser displacement sensor was used to monitor the gap changes between the cuff and the silicone rubber surface in real time, and the maximum gap values during 300 continuous movement cycles were recorded. The average value of 10 samples was taken as the final result.

[0090] Structural durability: a 0.9% sodium chloride solution was injected into the core of the adult paper diaper until saturation (500 mL was injected per piece, in 5 equal portions, with 5 min intervals), and after saturation, it was left to stand for 30 min. A three-dimensional profilometer was used to measure the three-dimensional height of the cuff (measurement points were the midpoints of the root zone, middle zone and edge zone, and the two end points, a total of 5 points), and the percentage of the height of each point relative to the initial height was calculated. The average value was taken as the three-dimensional height retention rate after the core was saturated.

[0091] Table 1: Performance test results of the leak-proof cuffs of Examples 1-7 and Comparative Examples 1-6

[0092]

[0093] As shown in Table 1:

[0094] It can be seen from the comparison of examples 1-7 and comparative example 1 that: the comparative example 1 adopts traditional uniform hot pressing without partition differentiation treatment, resulting in global rigidity of the leakage prevention barrier, loss of regional elasticity due to uniform and dense arrangement of molecular chains, and inability to adapt to leg curvature changes in dynamic bending and stretching test, with a maximum gap value of 3.44 mm. Meanwhile, the uniform hot pressing causes uneven stress distribution in the material, and the three-dimensional height retention rate of the core after saturation is only 68.97 %.

[0095] However, in the embodiment of the present application, the root area is formed with continuous zigzag grooves by high temperature of 115-123 DEG C and high pressure of 0.8-1.2 MPa, the steep geometric lock effect is used to form rigid anchoring points in the high stress area of the leg root, resist the expansion thrust and active pulling of the core, the middle area is formed with gentle wave shallow grooves by medium temperature of 100-105 DEG C and medium pressure of 0.5-0.65 MPa, the low curvature corrugated structure provides elastic expansion redundancy, the hinge type deformation absorbs the shear stress when the leg bends and stretches, and the edge area is formed with smooth micro-arc surface by low temperature of 90-97 DEG C and low pressure of 0.35-0.4 MPa, the gradual curved surface transition eliminates the hard corners to realize passive sealing of soft contact with the skin. When the leg moves, the anchoring effect of the zigzag groove prevents the overall displacement of the root, the elastic expansion of the wave shallow groove compensates the local curvature mutation, and the micro-arc surface fills the micro gap by fitting the skin wrinkles, so that the barrier can dynamically adjust the shape according to the leg movement, real-time fit different body curves, effectively reduce the gap during leg movement compared with the global rigidity problem caused by traditional uniform hot pressing, and further reduce the risk of side leakage.

[0096] It can be seen from the comparison of examples 1 and comparative examples 2-4 that: the comparative example 2 lacks root area shaping, loses the rigid support of continuous zigzag grooves, and causes the root of the barrier to collapse during dynamic fitting, with a maximum gap value of 2.96 mm and a height retention rate of 76.32 %; the comparative example 3 omits the gentle wave shallow groove structure in the middle area, so that the barrier loses the elastic transition layer and cannot buffer the stress through flexible hinge during dynamic bending and stretching, with a maximum gap of 2.78 mm and a height retention rate of 81.54 %; the comparative example 4 has no edge area smooth micro-arc surface treatment, and the edge material is too rigid, which easily causes wrinkle gap when fitting the skin, with a maximum gap of 2.65 mm and a height retention rate of 84.71 %; thereby destroying the gradient structure of rigid support, elastic transition and flexible fitting, and causing performance degradation.

[0097] It can be seen from the comparison of Example 1 and Comparative Examples 5-6 that: in Comparative Example 5, the directional air cooling of the root zone is changed to the same mild cooling as the middle zone, resulting in that the molecular chains of the root zone fail to quickly lock the orientation after high-temperature shaping, and thermal relaxation occurs, the maximum gap increases to 2.31 mm, and the height retention rate decreases to 87.26%; in Comparative Example 6, the cooling mode of the middle zone and the edge zone is changed to the forced directional air cooling of the root zone, so that the molecular chains of the middle and edge zones are excessively locked, the internal stress cannot be slowly released, the elastic recovery ability is lost, the maximum gap is 2.48 mm, and the height retention rate is 85.39%; thus, the synergistic mechanism of the partition cooling is destroyed, the molecular chain orientation stability or the elastic recovery ability is reduced, and finally the dynamic fitting and the structural durability are affected.

[0098] As shown in Figures 2-5 The present application provides a kind of adult paper diaper three-dimensional leakage prevention edge hot pressing shaping method's shaping equipment, including: equipment body 2, setting in equipment body 2 top for placing and clamping paper diaper's placement clamping mechanism, and a plurality of linear guide rails 3 for driving placement clamping mechanism to be translated in working position are installed in equipment body 2 top;The top of equipment body 2 is fixed with top plate 5 by a plurality of support bars 4, and root shaping mechanism, middle shaping mechanism and edge shaping mechanism are sequentially installed on top plate 5 in the direction of paper diaper travel;Root shaping mechanism, middle shaping mechanism and edge shaping mechanism are all installed with air cooling component 6 for directional air cooling to paper diaper leakage prevention edge towards the side of paper diaper travel direction;

[0099] Root shaping mechanism, middle shaping mechanism and edge shaping mechanism all include: pressure block 7 being set in the bottom of top plate 5, die support 71 being fixed in the top of equipment body 2 and being located at the bottom of pressure block 7, and a plurality of heating strips 72 being fixed in the bottom of pressure block 7;The bottom of heating strip 72 is fixed with shaping upper die 73, the top of die support 71 is fixed with shaping lower die 74, and power component for driving pressure block 7 to apply shaping pressure is installed on top plate 5;The cross-sectional structure of shaping upper die 73 and shaping lower die 74 in root shaping mechanism is continuous zigzag groove, the cross-sectional structure in middle shaping mechanism is gentle wave shallow groove, and the cross-sectional structure in edge shaping mechanism is smooth micro-arc surface.

[0100] It should be noted that the number of linear guide rails 3 is preferably two, and symmetrically distributed on both sides of die support 71;The heating mode of heating strip 72 is one of heat conduction or heat radiation, the shell of heating strip 72 is a material with high conduction coefficient, the power of heating strip 72 in root shaping mechanism is higher than that of heating strip 72 in middle shaping mechanism and edge shaping mechanism, and the power of a single strip is 300-500 W;The number of heating strip 72, shaping upper die 73 and shaping lower die 74 is preferably two, and symmetrically distributed, for respectively corresponding to the leakage prevention edges on both sides of paper diaper.

[0101] Specifically, the device body 2 is driven by the linear guide rail 3 to move the placement and clamping mechanism, so that the diaper passes through the root, middle and edge shaping mechanisms in sequence. The upper shaping mold 73 of each mechanism is pushed by the power component to close with the lower shaping mold 74. The heating strip 72 performs zoned hot pressing on the partition material, and at the same time, it cooperates with the subsequent air cooling component 6 to complete gradient cooling. In this way, through the three-zone irregular mold and step-by-step hot pressing, the functional gradient distribution of rigid support, elastic transition and flexible fit of the leak-proof partition from the root to the edge can be achieved, thereby solving the problem of rigidity throughout the entire area caused by traditional uniform hot pressing, so that the partition can adapt to the dynamic changes of leg circumference after wearing and eliminate gaps.

[0102] Optionally, in order to achieve the effect of translational retrieval of the driving placement clamping mechanism of the linear guide rail 3 in the working position, a power structure can be set between the translation frame 8 and the linear guide rail 3 or between the translation frame 8 and the equipment body 2. The power structure includes at least: a power source located on the translation frame 8, and a transmission component located between the translation frame 8 and the linear guide rail 3 or between the translation frame 8 and the equipment body 2.

[0103] The power source has a specific structure that can output rotational motion (such as a servo motor) in the prior art, and the transmission component has a specific structure that can transmit rotational motion and convert it into linear motion (such as a gear and rack) in the prior art. Both are common knowledge in the field, so this application will not explain the control method and structure in detail, and will not elaborate on them here.

[0104] It is understood that the shaping equipment can achieve fully automated operation of the linkage of various components and the anti-leakage edge hot pressing shaping through the control system. The control method of the control system is automatic control through a programmable controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Therefore, this application document will not explain the control method, modules and circuit connections in detail, and will not elaborate on them here.

[0105] like Figure 6 As shown, in some embodiments, the clamping mechanism includes: at least two sets of translation frames 8; each set of translation frames 8 includes: a plurality of sliders 81 slidably connected to the top of the linear guide rail 3, a plurality of fixing blocks 82 fixed to the top of the plurality of sliders 81, and a connecting plate 83 fixed between the plurality of fixing blocks 82; an electric telescopic rod 84 is installed on one side of the fixing block 82; a pressure strip 85 is installed between the output end of the electric telescopic rod 84 and the output end of the electric telescopic rod 84 in the adjacent translation frame 8 for clamping the front waist area or the back waist area of ​​the diaper.

[0106] It should be noted that the number of translation frames 8 is preferably two. The two translation frames 8 are controlled synchronously by electronic gears through PLC to ensure that the hot pressing positions of the left and right sides are kept highly symmetrical. The top surface of the fixing block 82 is at least 20 mm higher than the horizontal plane of the shaping lower mold 74 to ensure that there is no risk of collision during translation and to avoid interference between the two movements when retrieving. The bottom of the pressure strip 85 is fixed with a rubber strip to prevent slipping and to avoid damage that may be caused by the rigid clamping of the diaper. The electric telescopic rod 84 has a built-in pressure sensor to dynamically adjust the clamping force (range 0.5~3N) to prevent the material in the waist area of ​​the diaper from being crushed.

[0107] Specifically, the clamping mechanism is slidably connected to the linear guide rail 3 via the slider 81. When the electric telescopic rod 84 retracts, it drives the pressure strip 85 to clamp the front / back waist area of ​​the diaper downwards. The rubber strip contacts to avoid damaging the material. The top surface of the fixing block 82 is higher than the shaping lower mold 74 to prevent interference. The double translation frame 8 coordinates to control the diaper's travel trajectory, so that the leak-proof partitions on both sides are accurately aligned with the three sets of shaping molds. The flexible clamping ensures that the diaper is wrinkle-free and deformed during transportation, and prevents the elastic material in the waist area from relaxing due to mechanical stress. This ensures that the product is not pre-deformed when it enters the hot pressing station, providing a precision basis for zoned hot pressing and avoiding shaping misalignment caused by slippage.

[0108] like Figure 7 As shown, in some embodiments, the air-cooled assembly 6 includes: an inverted T-shaped tube 61 installed at the bottom of the top plate 5, a diversion tube 62 fixed at both ends of the bottom of the inverted T-shaped tube 61, and a plurality of air outlets 63 fixed at the bottom of the diversion tube 62 for blowing air toward the root area, middle area or edge area of ​​the leak-proof partition; a plurality of connecting rods 64 are fixed at the bottom of the top plate 5, and the bottom of the plurality of connecting rods 64 is fixed to the side of the inverted T-shaped tube 61.

[0109] An inverted T-shaped tube 61 is mounted at the top of the upper surface of the top plate 5 with an air supply head 65 for connecting to an external air supply device; an external air supply device located on the side of the root shaping mechanism is used to supply compressed air at 15~18 ℃ to the air supply head 65; an external air supply device located on the side of the middle shaping mechanism and the edge shaping mechanism is used to supply ambient air at 24~30 ℃ to the air supply head 65.

[0110] It should be noted that several air outlets 63 are evenly distributed in a linear array at the bottom of the diversion pipe 62. The distance between the bottom of the air outlet 63 located on the root shaping mechanism side and the leak-proof partition is 20~30 cm, and the distance between the bottom of the air outlet 63 located on the middle and edge shaping mechanisms side and the leak-proof partition is 40~50 cm.

[0111] Specifically, the external gas delivery device delivers 15-18℃ compressed air or 24-30℃ ambient air to the gas delivery head 65, the gas is then split by the inverted T-shaped pipe 61 and enters the split pipe 62 for further splitting, and the air is blown by the air outlet heads 63 to the root area or middle area or edge area of the leakproof barrier, so as to realize the shaping and cooling after hot pressing, the directional air cooling makes the molecular chain of the root area of the leakproof barrier quickly lock, avoids the shaping failure caused by thermal relaxation, the gradient air speed reduces the stress concentration of the middle area of the leakproof barrier, and the soft air cooling of the edge area maintains the softness of the material, thereby improving the structure retention effect after hot pressing.

[0112] For example, the gas delivery device connected to one side of the root shaping mechanism can be a combination of a screw air compressor, a refrigerated dryer and a filter system. Specifically, the compressed air is compressed by the screw air compressor, dehydrated by the refrigerated dryer, purified by multi-stage filtration, and then adjusted to 15-18℃ by the electric heating module to realize the delivery of 15-18℃ compressed air.

[0113] The gas delivery device connected to one side of the middle and edge shaping mechanism can be a combination of a blower, a high-efficiency filter and an air flow stabilizing system. Specifically, the ambient air is sucked by the blower, impurities are removed by primary and medium efficiency filters, and then the air is stabilized in the static pressure tank and adjusted to 24-30℃ by the temperature compensation module to realize the delivery of 24-30℃ ambient air.

[0114] As shown in FIG. 1, Figure 8 In some embodiments, the power assembly includes a hydraulic cylinder 9 mounted on the top of the top plate 5, and a translation plate 91 fixed to the output end of the hydraulic rod at the bottom of the top plate 5; the two sides of the translation plate 91 are slidably connected to the sides of the support rod 4 through sleeves, and the bottom of the translation plate 91 is fixed to the top of the pressing block 7.

[0115] It should be noted that the hydraulic cylinder 9 is controlled by an external hydraulic control system. The hydraulic control system is powered by a motor, uses a hydraulic pump to convert mechanical energy into pressure, pushes hydraulic oil, and controls various valves to change the flow direction of the hydraulic oil, thereby driving the hydraulic cylinder 9 to move in different strokes and directions. The specific structure is a general standard part or a component known to those skilled in the art, which will not be described in detail here.

[0116] Specifically, the power assembly drives the translation plate 91 to vertically ascend and descend along the support rod 4 through the hydraulic cylinder 9, and then drives the pressing block 7 at the bottom of the translation plate 91 and the shaping upper die 73 to press down. The hydraulic control system adjusts the pressure and stroke according to the preset parameters, so that the shaping upper die 73 is accurately pressed at a set pressure, thereby realizing the differential hot pressing of the partitioned areas of the leakproof barrier.

[0117] The above is based on the ideal embodiment of the present application, through the above description, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0118] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A hot-pressing shaping method for a three-dimensional leakage-preventing barrier leg of an adult paper diaper, characterized by, The method comprises the following steps: S1, the leak-proof barrier is divided into root zone, middle zone and edge zone from inside to outside in turn; S2, the root zone is shaped by the upper and lower molds with continuous sawtooth groove structure with groove depth of 1.6-3.5 mm at 115-123 ℃ and 0.8-1.2 MPa for 3-6 s; S3, the middle zone is shaped by the upper and lower molds with gentle wave shallow groove structure with groove depth of 0.8-2 mm at 100-105 ℃ and 0.5-0.65 MPa for 2-4 s; S4, the edge zone is shaped by the upper and lower molds with smooth micro-arc surface structure with curvature radius of 1.7-4 mm at 90-97 ℃ and 0.35-0.4 MPa for 2-3 s; S5, the root zone after hot pressing is cooled by directional air at a speed of 8-10 m / s and a distance of 20-30 cm for 12-20 s; S6, the middle zone and the edge zone after hot pressing are cooled by directional air at a speed of 1-3 m / s and a distance of 40-50 cm for 22-28 s to obtain the three-dimensional leak-proof barrier of adult diaper.

2. The method according to claim 1, wherein the method is characterized in that: In the step S5, the cooling medium for the directional air cooling of the root zone is compressed air at 15-18 ℃.

3. The method according to claim 1, wherein the method is characterized in that: In the step S6, the cooling medium for the directional air cooling of the middle zone and the edge zone is ambient air at 24-30 ℃.

4. The shaping device for the hot-press shaping method of a three-dimensional leakage preventing barrier leg of an adult paper diaper according to any one of claims 1 to 3, characterized in that, The device comprises: a device body, a placing and clamping mechanism arranged on the top of the device body for placing and clamping the diaper, and a plurality of linear guides mounted on the top of the device body for driving the placing and clamping mechanism to translate in the working position; the top of the device body is fixed with a top plate through a plurality of support rods, and the top plate is sequentially provided with a root shaping mechanism, a middle shaping mechanism and an edge shaping mechanism along the direction of diaper travel; the root shaping mechanism, the middle shaping mechanism and the edge shaping mechanism are each provided with an air cooling assembly on the side facing the direction of diaper travel for directional air cooling of the diaper leak-proof barrier; the root shaping mechanism, the middle shaping mechanism and the edge shaping mechanism each comprise a pressing block arranged on the bottom of the top plate, a mold support fixed on the top of the device body at the bottom of the pressing block, and a plurality of heating strips fixed on the bottom of the pressing block; the bottom of the heating strip is fixed with a shaping upper mold, the top of the mold support is fixed with a shaping lower mold, and the top plate is provided with a power assembly for driving the pressing block to apply shaping pressure; the cross-sectional structure of the shaping upper mold and the shaping lower mold in the root shaping mechanism is a continuous sawtooth groove, the cross-sectional structure in the middle shaping mechanism is a gentle wave shallow groove, and the cross-sectional structure in the edge shaping mechanism is a smooth micro-arc surface.

5. The shaping device of the hot-press shaping method of the three-dimensional leakage-proof barrier leg elastics of adult paper diapers according to claim 4, characterized in that: The placing clamping mechanism comprises: at least two groups of translation frames; each group of the translation frames comprises: a plurality of sliding blocks slidingly connected on top of the linear guide rails, a plurality of fixed blocks fixed on top of the sliding blocks, and a connecting plate fixed between the fixed blocks; one side of the fixed blocks is provided with an electric telescopic rod; An output end of the electric telescopic rod is provided with a pressing strip between an output end of an electric telescopic rod of an adjacent translation frame, for clamping a front waist region or a back waist region of the diaper.

6. The shaping device of the hot-press shaping method of the three-dimensional leakage-proof barrier leg elastics of adult paper diapers according to claim 4, characterized in that: The air cooling assembly comprises: a reverse T-shaped pipe installed on the bottom of the top plate, shunt pipes fixed on both ends of the bottom of the reverse T-shaped pipe, and a plurality of air outlet heads fixed on the bottom of the shunt pipes for blowing air to the root region, the middle region or the edge region of the leak-proof barrier; the bottom of the top plate is fixed with a plurality of connecting rods, and the bottom of the connecting rods is fixed with the side of the reverse T-shaped pipe; The top end of the reverse T-shaped pipe on the upper surface of the top plate is provided with a gas supply head for externally connecting a gas supply device; the gas supply device externally connected on one side of the root shaping mechanism is used for supplying 15-18 ℃ compressed air to the gas supply head; the gas supply device externally connected on one side of the middle shaping mechanism and the edge shaping mechanism is used for supplying 24-30 ℃ ambient air to the gas supply head.

7. The shaping equipment of the hot-pressing shaping method of the three-dimensional leakage-proof side barriers of adult paper diapers according to claim 4, characterized in that: The power assembly comprises: a hydraulic cylinder installed on the top of the top plate, and a translation plate fixed on the output end of the hydraulic cylinder on the bottom of the top plate; both sides of the translation plate are slidingly connected with the side of the support rod through a sleeve, and the bottom of the translation plate is fixed with the top of the pressing block.

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