Diaper with detachable waist and preparation method thereof

Abstract

The invention relates to the field of disposable sanitary products, and in particular to a diaper with a detachable waist and a preparation method thereof, which solves the problem of insufficient waist comfort of existing diaper products. The diaper comprises a liquid-permeable surface layer, an absorbent core and a liquid-impermeable bottom layer which are stacked, and elastic waists are arranged on both sides of the back side, and the elastic waists comprise a base fabric layer, a waist elastic member and an outer layer; the waist elastic member is bonded to the outer layer in a stretched state so that the outer layer is wavy; the elastic waist is bonded to the base fabric layer in an unstretched state so that the outer layer is fixed to the base fabric layer in a wavy structure, a distance L is provided between the waist elastic member and the end of the outer layer so that the end of the outer layer forms a hollow and flexible bubble cavity, one end of the base fabric layer is fixed to the back side, and the other end is provided with at least two magic hooks for fixing the elastic waist to the front abdomen.

Description

Technical Field

[0001] The invention relates to the field of disposable sanitary products, and in particular to a diaper with a detachable waistline and a preparation method thereof. Background Art

[0002] Diapers are disposable sanitary products commonly used by infants and young children. When worn, they are fixed by Velcro on both sides of the waist. Elastic parts are arranged in the waist at one end or both ends to provide elasticity after the Velcro is fastened to ensure the fit of the diaper when worn; the specific structure is shown in the technical scheme with reference to the announcement number CN205041621U, a new type of diaper, including a trouser body, an elastic waist, an elastic fabric strip, Velcro and a plush cloth piece, the front waist of the trouser body is provided with an elastic waist, the two sides of the elastic waist are connected to the elastic fabric strip, the ends of the elastic fabric strip are connected with Velcro, the magic hooks in the Velcro are distributed in a vertical line, and plush cloth pieces are arranged on the left and right sides of the outer side of the rear waist of the trouser body. When the diaper is worn, the magic hooks on the Velcro can hook the plush cloth piece.

[0003] In this structure, the elasticity of the waist is adjusted by extending the magic hook from the front waist to the back, bonding with the plush cloth on the back waist, and adjusting the bonding position. However, in this structure, no matter the trouser body, elastic waist, or elastic fabric strip, after the structure is fixed, the elastic waist on the front waist is tightened by the elastic fabric strip after being fixed, which is easy to form marks on the skin at the edge of the elastic waist; and after the elastic waist is tightened and stretched, the edge of the front waist is not soft enough, which is easy to contact and rub with the soft skin of the baby's lower abdomen at the front waist, causing abrasions and affecting comfort. Summary of the invention

[0004] Therefore, the present invention provides a diaper with a detachable waist and a preparation method thereof, which solves the problem of insufficient waist comfort of existing diaper products.

[0005] To achieve the above object, the present invention is achieved through the following technical solutions:

[0006] A diaper with a detachable waist, comprising a liquid-permeable surface layer, an absorbent core and a liquid-impermeable bottom layer which are stacked, wherein the width direction of the diaper is defined as the X direction, the length direction is defined as the Y direction, and the diaper is further divided into a front abdomen, a crotch and a back side according to the position of the human body when the diaper is worn, an elastic waist is arranged on both sides of the back side in the X direction, the elastic waist comprises a base fabric layer, a waist elastic member and an outer layer; the waist elastic member is bonded to the outer layer in a stretched state so that the outer layer is wavy; the elastic waist is bonded to the base fabric layer in an unstretched state so that the outer layer is fixed to the base fabric layer in a wavy structure, a spacing L is provided between the waist elastic member and the Y-direction end of the outer layer so that the Y-direction end of the outer layer forms a hollow and flexible bubble cavity, one end of the base fabric layer in the X direction is fixed to the back side, and the other end is provided with at least two magic hooks for fixing the elastic waist to the front abdomen.

[0007] Preferably, the edge of the base fabric layer is folded inward to form a flange portion, and the flange portion wraps the bubble cavity.

[0008] Preferably, the elastic waists on both sides are integrally formed so that the bubble cavity is arranged around the ends of the front abdomen and the back after the diaper is worn.

[0009] Preferably, the waist elastic member is a fine-denier spandex yarn extending along the X direction and arranged at equal intervals along the Y direction.

[0010] Preferably, when the diaper is worn, the ends of the elastic waist are buckled and fixed upwardly at an angle, so that the X-direction width at the waist of the human body is greater than the width at the hips.

[0011] Preferably, when the diaper is worn, the ends of the elastic waist are tilted downward and fastened and fixed, so that the X-direction width at the waist of the human body is smaller than the width at the hips.

[0012] A method for preparing a diaper with a detachable waistline comprises the following steps:

[0013] S1, respectively taking the liquid-permeable surface layer material, the absorbent core material, and the liquid-impermeable bottom layer material and conveying them along the Y direction on an assembly line, and then compositely fixing them into one;

[0014] S2, preparing an elastic waist;

[0015] S3, placing the elastic waist obtained in step S2 on both sides of the product obtained in step S1 in the X direction;

[0016] S4, arc-cutting the edges on both sides of the product obtained in step S3 in the X direction to form leg openings of the diaper;

[0017] S5, cutting the product obtained in step S4 into individual diaper products;

[0018] The step S2 comprises the following steps:

[0019] S21, taking the waist elastic member material for conveying, and making the waist elastic member in an elastically stretched state during the conveying process;

[0020] S22, taking the outer layer material for conveying, and compounding it with the waist elastic member material, and continuing to convey the obtained product, and conveying it through an adsorption conveying device, during which the waist elastic member material is elastically restored, so that the cross section of the outer layer material is wavy;

[0021] S23, compounding a base fabric layer on the surface of the waist elastic member so that the waist elastic member is sandwiched between the base fabric layer and the outer surface layer;

[0022] S24, cutting the product obtained in step S23 into pieces to obtain a single elastic waistline.

[0023] Preferably, the adsorption and conveying device includes a lower adsorption and conveying component and an upper adsorption and conveying component which are sequentially arranged along the conveying direction, the base fabric layer material is input by the upper adsorption and conveying component, and the lower adsorption and conveying component and the upper adsorption and conveying component both include an air suction groove for providing negative pressure adsorption and a belt drive component for material transfer, the air suction groove on the lower adsorption and conveying component is sequentially a negative pressure adsorption area for transfer and a zero pressure transfer area for elastic recovery of the waist elastic member along the conveying direction, and the upper adsorption and conveying component is located above the zero pressure transfer area so that the base fabric layer material is attached to the recovered waist elastic member.

[0024] Preferably, in the above S23, the base fabric layer is folded along one side edge after compounding to form a flange portion wrapping the edge of the outer layer.

[0025] By adopting the above technical solution, the beneficial effects of the present invention are:

[0026] The technical solution is different from the traditional diaper product structure. The elastic waist originally sandwiched between the liquid-permeable surface layer and the liquid-impermeable bottom layer is externally arranged on the liquid-impermeable bottom layer to form a detachable elastic waist structure. The entire elastic waist forms a wavy flexible structure in structure, and a flexible bubble cavity is formed on the edge on the side in contact with the human body, so as to greatly improve the softness during contact and avoid the occurrence of strangulation marks and abrasions. Compared with the traditional Velcro fixed structure, the elastic waist has a sufficient length as a whole, and can flexibly adjust the fixed position according to different body shapes, so as to better fit the baby's waist, avoid the situation that the waist is too loose / too tight, and have stronger flexibility in use while ensuring comfort. The wavy elastic waist formed forms a three-dimensional space structure with a large thickness without increasing the number of layers, ensuring the air permeability at the waist, and having a certain thickness, can better fit the baby's skin surface, avoiding gaps at irregular surface positions such as the back buttocks position and the sides of the navel on the front abdomen, ensuring softness when wearing, and improving the structural stability when wearing.

[0027] During production, the liquid permeable surface layer, absorbent core material and liquid impermeable bottom material can be compounded in the early stage of production, and then the elastic waistband can be applied. Compared with the traditional process of sandwiching the elastic waistband between the liquid permeable surface layer and the liquid impermeable bottom material, the difficulty of equipment layout is greatly simplified, and the difficulty of adjusting the equipment when the angle of the elastic waistband is offset when it is applied laterally is avoided. At the same time, it is also more conducive to adjusting various parameters of the elastic waistband, and the adjustment changes of its parameters are independent, so as to be suitable for the flexible output of different types of diaper products, and it is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a schematic diagram of the unfolded structure of a diaper according to the first embodiment of the present invention.

[0029] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the T1 direction at point A in the middle.

[0030] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the T2 direction at point A in the middle.

[0031] Figure 4 Schematic diagram of the elastic waist forming process.

[0032] Figure 5 It is a structural schematic diagram of the adsorption conveying device.

[0033] Figure 6 This is a schematic diagram of the unfolded structure of the diaper according to the second embodiment of the present invention.

[0034] : 100, liquid-permeable surface layer; 200, absorbent core; 300, liquid-impermeable bottom layer; 400, elastic waist; 401, base fabric layer; 402, waist elastic member; 403, outer layer; 404, bubble cavity; 405, magic hook; 406, flange portion; 500, lower adsorption and transmission component; 501, suction groove; 502, belt transmission component; 500a, negative pressure adsorption area; 500b, zero pressure transmission area; 600, upper adsorption and transmission component; a, front abdomen; b, crotch; c, back side. DETAILED DESCRIPTION

[0035] The following will describe the implementation methods of the present invention in detail in conjunction with specific embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Embodiment 1

[0036] refer to Figure 1 , Figure 2 and Figure 3A diaper with a detachable waist, comprising a liquid-permeable surface layer 100, an absorbent core 200 and a liquid-impermeable bottom layer 300 arranged in layers, wherein the width direction of the diaper is defined as the X direction, the length direction is defined as the Y direction, and the diaper is further divided into a front abdominal side a, a crotch b and a back side c according to the position of the human body when the diaper is worn, and an elastic waist 400 is arranged on both sides of the back side c in the X direction, and the elastic waist 400 comprises a base fabric layer 401, a waist elastic member 402 and an outer layer 403, wherein the base fabric layer 401 and the outer layer 403 are both made of non-woven fabric, and the waist elastic member 402 is a fine-denier spandex yarn extending in the X direction and arranged at equal intervals in the Y direction, and the fine-denier spandex yarn can greatly improve the air permeability and softness of the elastic waist 400, thereby improving the breath ... The material level ensures comfort; the waist elastic member 402 is bonded to the outer layer 403 in a stretched state, so that the outer layer 403 is wavy (the wavy here is an irregular reciprocating zigzag structure); the elastic waist 400 is bonded to the base fabric layer 401 in an unstretched state, so that the outer layer 403 is fixed on the base fabric layer 401 in a wavy structure, and there is a spacing L between the waist elastic member 402 and the Y-direction end of the outer layer 403, so that the Y-direction end of the outer layer 403 forms a hollow and flexible bubble cavity 404, one end of the base fabric layer 401 in the X direction is fixed to the back side c, and the other end is provided with a bubble cavity 404 for the elastic waist 400 to connect with the front abdomen The magic hook 405 fixed to the side a can be directly fixed on the front ventral side a; under the premise of ensuring structural stability, at least two magic hooks 405 are required when the elastic waist 400 is relatively long to ensure structural stability when worn; the technical solution is different from the traditional diaper product structure, in which the elastic waist 400 originally sandwiched between the liquid-permeable surface layer 100 and the liquid-impermeable bottom layer 300 is externally arranged on the liquid-impermeable bottom layer 300 to form a detachable elastic waist 400 structure, and the entire elastic waist 400 forms a wavy flexible structure in structure, and a flexible bubble cavity 404 is formed on the edge of the side in contact with the human body, so as to greatly improve the softness during contact and avoid strangulation marks and rubbing. Injury; compared with the traditional Velcro fixing structure, the elastic waist 400 has a sufficient length as a whole, and can flexibly adjust the fixed position according to different body shapes, so as to better fit the baby's waist and avoid the situation of the waist being too loose / too tight. Under the premise of ensuring comfort, it has stronger flexibility in use; the wavy elastic waist 400 formed forms a three-dimensional space structure with a large thickness without increasing the number of layers, thereby ensuring the breathability of the waist, and having a certain thickness, can better fit the baby's skin surface, avoiding gaps at irregular surface positions such as the back side c buttocks position, the front abdomen a both sides of the navel, etc., ensuring softness when worn and improving the structural stability when worn.

[0037] Structurally, the edge of the base fabric layer 401 is folded inward to form a cuff 406, and the cuff 406 wraps the bubble cavity 404. The cuff 406 can wrap the edge of the wavy structure to obtain a softer edge, avoiding the lack of flexibility of the edge material of the outer layer 403 and affecting the comfort. At the same time, the wrapping of the cuff 406 also improves the aesthetics of the entire elastic waist 400.

[0038] In use, unlike the traditional structure, it can be worn more flexibly, forming a more fitting wearing form:

[0039] ① When the diaper is worn, the ends of the elastic waist 400 are buckled and fixed upwardly, so that the X-direction width at the waist of the human body is greater than the width at the hip; this state is suitable for babies whose waist and abdomen size is greater than the hip size;

[0040] ②. Contrary to the above ①, when the diaper is worn, the ends of the elastic waist 400 are tilted downward and fastened to make the X-direction width at the waist smaller than the width at the hips; this state is suitable for babies whose hips are larger than their waist and abdomen.

[0041] The structure of the above-mentioned product is produced by the following process.

[0042] A method for preparing a diaper with a detachable waistline comprises the following steps:

[0043] S1, respectively taking the liquid-permeable surface layer 100 material, the absorbent core 200 material, and the liquid-impermeable bottom layer 300 material and conveying them along the Y direction on an assembly line, and then compositely fixing them into one;

[0044] S2, preparing an elastic waist 400;

[0045] S3, placing the elastic waist circumference 400 obtained in step S2 on both sides of the product obtained in step S1 in the X direction; the elastic waist circumference 400 is placed in pairs and at equal intervals to meet the structural composition of each diaper product;

[0046] S4, arc-cutting the edges on both sides of the product obtained in step S3 in the X direction to form leg openings of the diaper;

[0047] S5, cutting the product obtained in step S4 into individual diaper products;

[0048] The step S2 includes the following steps: Figure 4 :

[0049] S21, taking the waist elastic member 402 material for conveying, and during the conveying process, the waist elastic member 402 is in an elastic stretched state; in this state, the tension of the waist elastic member 402 is adjusted by the guide roller and the friction rubber roller in conjunction with the tension adjustment component commonly used in the industry;

[0050] S22, take the outer layer 403 material for conveying, and compound it with the waist elastic member 402 material, continue to convey the obtained product, and convey it through an adsorption conveying device, during which the waist elastic member 402 material is elastically restored so that the cross section of the outer layer 403 material is wavy; wherein the adsorption conveying device is as Figure 5 As shown, it includes a lower adsorption conveying assembly 500 and an upper adsorption conveying assembly 600 which are sequentially arranged in the conveying direction, the lower adsorption conveying assembly 500 is used to transfer the outer surface layer 403 behind the composite waist elastic member 402, and the upper adsorption conveying assembly 600 is used to input the material of the base fabric layer 401, and the lower adsorption conveying assembly 500 and the upper adsorption conveying assembly 600 both include an air suction groove 501 for providing negative pressure adsorption, and a belt transmission assembly 502 for material transfer, and adsorption holes are provided on the surface of the conveyor belt in the belt transmission assembly 502 for negative pressure adsorption of materials;

[0051] The suction grooves 501 on the lower adsorption conveying assembly 500 are respectively a negative pressure adsorption area 500a for conveying and a zero pressure transfer area 500b for elastic recovery of the waist elastic member 402 along the conveying direction. When the waist elastic member 402 in a stretched state is in the negative pressure adsorption area 500a, the bonded outer surface layer 403 is still in a stretched and flat state; and as the conveying proceeds, after entering the zero pressure transfer area 500b, the waist elastic member 402 assembly recovers, so that the outer surface layer 403 is subjected to the elastic force to form the required wavy structure, and continues to move forward in this state as the conveying proceeds; correspondingly, the upper adsorption conveying assembly 600 is located above the zero pressure transfer area 500b, so that the base fabric layer 401 material is attached to the recovered waist elastic member 402;

[0052] S23, compounding the base fabric layer 401 on the surface of the waist elastic member 402, so that the waist elastic member 402 is sandwiched between the base fabric layer 401 and the outer layer 403; specifically, the distance between the upper adsorption conveying component 600 and the lower adsorption conveying component 500 gradually decreases from the input end (such as Figure 5 As shown), the surface of the base fabric layer 401 after the glue application gradually fits with the outer surface layer 403 of the wavy structure below, and then is pressed and fixed by a composite roller group and other structures located behind the upper adsorption conveying assembly 600 to obtain the desired structure;

[0053] S24, cutting the product obtained in step S23 to obtain individual elastic waist circumferences 400; the individual elastic waist circumferences 400 are turned 90 degrees and attached in pairs to both sides of the product obtained in step S1 in the X direction.

[0054] Structurally, in the above S23, the base fabric layer 401 is folded along one side edge after compounding to form a flange portion 406 that wraps around the edge of the outer layer 403. This folding is performed using one or more folding plates commonly used in the art, and will not be described in detail here.

[0055] During production, the liquid-permeable surface layer 100, the absorbent core 200 material and the liquid-impermeable bottom layer 300 material can be compounded in the early stage of production, and then the elastic waist 400 is applied. Compared with the traditional process of sandwiching the elastic waist 400 between the liquid-permeable surface layer 100 and the liquid-impermeable bottom layer 300, the difficulty of equipment layout is greatly simplified, and the difficulty of equipment adjustment when the angle of the elastic waist 400 is offset when it is applied laterally is avoided. At the same time, it is also more conducive to adjusting various parameters of the elastic waist 400, and the adjustment changes of its parameters are independent, so as to be suitable for the flexible production of different types of diaper products, and it is highly practical.

[0056] This process does not specifically describe the conventional glue application structure, material transportation, deviation correction, and material storage in the art, which are well known to those skilled in the art and will not be elaborated on here. Embodiment 2

[0057] Structurally, reference Figure 6 Compared with the first embodiment, the elastic waistbands 400 on both sides are integrally formed, so that the bubble cavity 404 is arranged around the ends of the front ventral side a and the back dorsal side c after the diaper is worn. Under this structure, the length of a single elastic waistband 400 needs to be lengthened during production, and the single elastic waistband 400 serves as a fixed structure of a single diaper product; however, the obtained product has a complete annular bubble edge at the waist edge of the diaper, which is more comfortable.

[0058] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A method for preparing a diaper with a detachable waist, characterized in that: The following steps are involved: S1, respectively taking the liquid-permeable surface layer (100) material, the absorbent core (200) material, and the liquid-impermeable bottom layer (300) material and conveying them along the Y direction on an assembly line, and then compositely fixing them into one; S2, preparing an elastic waist (400); S3, placing the elastic waistline (400) obtained in step S2 on both sides of the product obtained in step S1 in the X direction; S4, arc-cutting the edges on both sides of the product obtained in step S3 in the X direction to form leg openings of the diaper; S5, cutting the product obtained in step S4 into individual diaper products; The step S2 comprises the following steps: S21, taking the waist elastic member (402) material for conveying, and during the conveying process, the waist elastic member (402) is placed in an elastically stretched state; S22, taking the outer layer (403) material for conveying, and compounding it with the waist elastic member (402) material, and continuing to convey the obtained product, and conveying it through an adsorption conveying device, during the conveying process, the waist elastic member (402) material is elastically restored so that the cross-section of the outer layer (403) material is wavy; the adsorption conveying device includes a lower adsorption conveying component (500) and an upper adsorption conveying component (600) arranged in sequence along the conveying direction, the base fabric layer (401) material is input by the upper adsorption conveying component (600), and the lower adsorption conveying component (500) and the upper adsorption conveying component (600) both include a The suction groove (501) is used to provide negative pressure adsorption, and the belt transmission component (502) is used for material transfer. The suction groove (501) on the lower adsorption and transmission component (500) is sequentially composed of a negative pressure adsorption area (500a) for transfer and a zero pressure transfer area (500b) for elastic recovery of the waist elastic member (402) along the conveying direction. The upper adsorption and transmission component (600) is located above the zero pressure transfer area (500b) so that the base fabric layer (401) material is attached to the recovered waist elastic member (402). The spacing between the upper adsorption and transmission component (600) and the lower adsorption and transmission component (500) gradually decreases from the input end. S23, compounding a base fabric layer (401) on the surface of the waist elastic member (402) so that the waist elastic member (402) is sandwiched between the base fabric layer (401) and the outer surface layer (403); S24, cutting the product obtained in step S23 into pieces to obtain a single elastic waistline (400).

2. The method for preparing the diaper with detachable waistline according to claim 1, characterized in that: In the above S23, the base fabric layer (401) is folded along one side edge after compounding to form a flanged portion (406) that wraps around the edge of the outer layer (403).

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