Elastic breathable three-dimensional guard, absorptive article and preparation process of elastic breathable three-dimensional guard

Abstract

The invention provides an elastic breathable three-dimensional guard, an absorptive article and a preparation process of the elastic breathable three-dimensional guard, and belongs to the technical field of hygienic products, the elastic breathable three-dimensional guard comprises outer coating layers, the outer coating layers define a closed ring and are arranged on the left side and the right side of the upper surface of an absorber, and hollow structures are formed in the outer coating layers; the elastic component is arranged in the outer coating layer, the elastic component comprises a buffer layer and an elastic piece wrapped in the buffer layer, and the elastic piece fixed in the outer coating layer is in a natural state, so that the three-dimensional guard can still stretch or contract when the three-dimensional guard is worn; according to the invention, the virtual cutting process is added after the sizing process, so that the elastic piece which is stretched originally retracts, and then the peripheral sealing process is carried out; when a user walks, along with the deformation movement of the absorptive article, the three-dimensional protective enclosure still has good elasticity and can be stretched or contracted, so that the wearing comfort is improved. The phenomenon that the three-dimensional protective enclosure lacks elasticity to cause tightening marks at the position where a user makes contact with the three-dimensional protective enclosure under the long-time wearing condition is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary products, and particularly relates to an elastic breathable three-dimensional side guard, an absorbent article and a preparation process thereof. Background Art

[0002] Currently, light incontinence care products mainly consist of a combination of an absorbent core and a surface material, which are suitable for use during daily activities or exercise, and can effectively absorb a small amount of urine and keep the body dry. With the improvement of users' requirements for comfort and breathability, various improved products have emerged on the market. However, these improvements often struggle to balance breathability, leak prevention, and comfort, resulting in a poor user experience.

[0003] At the same time, after the user wears it, the three-dimensional side guard will cause a U-shaped closed space to form between the skin and the absorbent article. This structure is prone to breeding bacteria, and the urine will produce ammonia under the action of urease and cannot be discharged in time, thus affecting the wearing experience. It may also produce odors and even cause allergic reactions.

[0004] The leak prevention component of existing products uses SMMS non-woven fabric (the SMMS structure belongs to composite non-woven fabric, which is a composite product of spunbond and meltblown. Here, S represents spunbond, M represents meltblown, and SMMS non-woven fabric is hot-rolled from a four-layer fiber web of "spunbond non-woven fabric - meltblown non-woven fabric - meltblown non-woven fabric - spunbond non-woven fabric"). It is difficult to balance high breathability and effective leak prevention, and the standing effect is not good. The contact area with the skin is small, which easily causes the leak prevention component to stretch into a sawtooth-like shape during activities, resulting in skin discomfort in sensitive skin areas such as the inner thigh. The existing technology still cannot fully meet users' comprehensive requirements for breathability, comfort, and leak prevention. Summary of the Invention

[0005] The present invention provides an elastic breathable three-dimensional side guard, an absorbent article and a preparation process thereof to solve the technical problems of poor breathability and easy skin friction of the three-dimensional side guard in the prior art.

[0006] To solve the above problems, the elastic breathable three-dimensional side guard provided by the present invention adopts the following technical solution: It includes an outer covering layer, which is arranged in a closed ring shape on the left and right sides of the upper surface of the absorbent body, and a hollow structure is formed inside the outer covering layer;

[0007] An elastic member, which is arranged inside the outer covering layer. The elastic member includes a buffer layer and an elastic part wrapped in the buffer layer. The elastic part fixed inside the outer covering layer is in a natural state, so that when worn, the three-dimensional side guard can still stretch or contract;

[0008] The elastic member is horizontally arranged above the inner part of the outer cladding layer. The width of the bottom of the outer cladding layer bonded to the absorber is smaller than the width of the elastic member, so that the three-dimensional side guard forms a trapezoidal structure with a narrower bottom and a wider top, and the top and both side surfaces of the three-dimensional side guard of the trapezoidal structure are arc-shaped.

[0009] As a further improvement, the number of the elastic members is 1 - 10.

[0010] As a further improvement, the number of the elastic members is 6 - 10.

[0011] As a further improvement, the outer cladding layer is a highly breathable non-woven fabric, preferably hot air non-woven fabric.

[0012] As a further improvement, the outer cladding layer is a strip-shaped highly breathable non-woven fabric. The two long sides of the strip-shaped non-woven fabric are bonded to each other to form a closed annular structure for wrapping the elastic member.

[0013] As a further improvement, the buffer layer is a water-repellent non-woven fabric, preferably spunbond non-woven fabric.

[0014] As a further improvement, the elastic member is a single-sided opening structure.

[0015] The present invention also provides an absorbent article, and the absorbent article has the above-mentioned three-dimensional side guard.

[0016] The present invention also provides a preparation process of an absorbent article. The absorbent article has the above-mentioned three-dimensional side guard. The preparation process of the absorbent article includes the following steps:

[0017] Gluing, which is used for gluing the absorbent article to prepare for the fixation of the elastic member;

[0018] Perimeter sealing, which is used for sealing the periphery of the absorbent article;

[0019] Perimeter cutting, which is used for cutting off the corner waste between two adjacent absorbent articles;

[0020] A virtual cutting process is also provided between the gluing process and the perimeter sealing process. After gluing, the elastic member is disconnected by the virtual cutting assembly, so that the elastic member retracts in advance to avoid the situation that the elastic member cannot retract after being fixed by perimeter sealing.

[0021] As a further improvement, the virtual cutting assembly includes two virtual cutting knives, and the two virtual cutting knives are arranged in a V-shaped layout; there are two groups of the virtual cutting assemblies. Defining the length direction of the absorbent article as the front-back direction, the two groups of virtual cutting assemblies are symmetrically arranged on the left and right sides of the absorbent article.

[0022] The beneficial effects of the above technical solutions of the present invention are as follows:

[0023] 1. The outer cladding of the present invention has a hollow structure, and the elastic member is disposed within the outer cladding to support the outer cladding, such that the outer cladding forms a hollow tunnel structure. During use, the three-dimensional girdle of the present invention is not prone to tipping over and has good stability, significantly reducing the situation of liquid leakage from the three-dimensional girdle due to the tipping over or severe deformation of the three-dimensional girdle.

[0024] 2. There are 6 - 10 elastic members in the elastic member, making the width of the elastic member wider. After the three-dimensional girdle of the present invention is adhered to the absorbent article, the three-dimensional girdle forms a tile-shaped trapezoid with a width at the upper end greater than that at the bottom, i.e., a trapezoidal structure with a wider upper part and a narrower lower part, and the top surface and both side surfaces of the trapezoid are arc-shaped structures.

[0025] After wearing, a relatively airtight U-shaped space is formed between the absorbent article and the human body. When the user is walking, there will be an alternating situation of squeezing the absorbent article and relieving the pressure on the absorbent article. When the absorbent article is squeezed, the gas in the closed space is discharged to the three-dimensional girdles on both sides, and the gas in the closed space decreases. As the walking posture changes, when the human body does not exert pressure on the absorbent article, the originally squeezed three-dimensional girdle returns to its original position. The tile-shaped trapezoid structure and the internal elastic member make the three-dimensional girdle of the present invention easier to return to its original state, and then the gas passes through the three-dimensional girdle and enters the closed space to supplement the part of the gas that was originally discharged, producing a breathing-like effect.

[0026] Since the gas only needs to pass through two layers of the three-dimensional girdle of the present invention, it is easier for the gas to pass through the three-dimensional girdle and enter the closed space between the absorbent article and the human body. During walking, the gas exchange volume in the closed space is relatively larger, taking away more heat and water vapor and reducing the generation of odors.

[0027] 3. When the user is walking or exercising, the deformation at the middle position of the three-dimensional girdle is relatively larger, and the deformation at both ends of the three-dimensional girdle is relatively smaller, such that buffer spaces are formed at both ends of the three-dimensional girdle. When the absorbent article is squeezed, a small amount of gas that enters the interior of the three-dimensional girdle but is not discharged will flow into the hollow tunnels at both ends of the three-dimensional girdle, rather than flowing back into the closed space, improving the ventilation efficiency. The gas flowing to both ends, a part of it will escape through the outer cladding, and the other part will flow back to the middle position of the three-dimensional girdle as the three-dimensional girdle returns to its original position and continue to escape for the second time.

[0028] 4. After the sizing process of the present invention, a virtual cutting process is added. After sizing, the elastic member is disconnected by the virtual cutting assembly, causing the originally stretched elastic member to retract. Then, the peripheral sealing process is carried out. In this way, the elastic member fixed on the absorbent article is in a natural state. When worn, the three-dimensional girdle will be slightly stretched. Since the elastic member is in a natural state in the initial state, when the user walks, as the absorbent article deforms and moves, the three-dimensional girdle still has good elasticity and can be stretched or contracted, improving the wearing comfort. This avoids the lack of elasticity of the three-dimensional girdle and the resulting indentations on the user's body at the positions in contact with the three-dimensional girdle during long-term wearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By referring to the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present invention will become readily understood. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0030] Figure 1 is a schematic structural diagram of the elastic and breathable three-dimensional girdle of the present invention;

[0031] Figure 2 is a reference diagram of the usage state of the elastic and breathable three-dimensional girdle of the present invention;

[0032] Figure 3 is a schematic structural diagram of the absorbent article of the present invention;

[0033] Figure 4 is a schematic diagram of the manufacturing process of the absorbent article of the present invention.

[0034] DESCRIPTION OF REFERENCE NUMERALS:

[0035] 1. Three-dimensional girdle; 101. Outer covering layer; 102. Buffer layer; 103. Elastic member; 2. Surface layer; 3. Absorbent body; 4. Bottom film; 5. Absorbent article; 6. Peripheral sealing embossing; 7. Virtual cutting knife. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Those skilled in the art should understand that the following described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0037] In the prior art, it is difficult for absorbent articles to simultaneously take into account high air permeability, effective leak-proofness, and product comfort, especially when worn for a long time. Insufficient air permeability can easily cause skin moisture, stuffiness, and even skin problems. The elastic member in the leak-proof component will be in close contact with human skin through the non-woven fabric. After the elastic member shrinks, the water-repellent fabric on the surface of the elastic member will form jagged wrinkles, which are easy to rub the skin or even damage the skin during exercise. At the same time, due to process problems, during production, the elastic member is in a tight state and fixed on the absorbent article. When the absorbent article is unfolded and worn, the elastic member is in a tight state and is difficult to continue to stretch. The elasticity is poor, and the tight elastic member is close to the skin, causing discomfort to the user. In addition, most leak-proof component structures using SMMS materials are SMMS non-woven fabrics directly covering the elastic member. When this structure has too much urine during use, the core body will not have time to absorb it, which will generate lateral force on the leak-proof component, causing the three-dimensional guard to be easily deformed and cause side leakage. In addition, the structural complexity and high cost of some existing three-dimensional guard products also limit their popularization and application.

[0038] In view of the above problems, the present invention improves the existing three-dimensional guardrail from two aspects of process and product structure.

[0039] In terms of technology, first of all, a virtual cutting process is added after the gluing process. After gluing, the elastic parts are disconnected through the virtual cutting assembly. Virtual cutting only disconnects the elastic parts to avoid cutting other structures, so that the originally stretched elastic parts retract, and then the peripheral sealing process is performed. In this way, the elastic parts fixed on the absorbent article are in a natural state. When worn, the three-dimensional guardrail will be slightly stretched. Since the elastic parts are in a natural state in the initial state, when the user walks, as the absorbent article deforms and moves, the three-dimensional guardrail still has good elasticity and can be stretched or contracted, which improves wearing comfort. Avoid long-term wear, the lack of elasticity of the three-dimensional guardrail causes the user to have marks at the contact position with the three-dimensional guardrail.

[0040] Secondly, the outer covering layer is coated in a coating manner, and the elastic component is coated in the outer covering layer, so the processing difficulty is relatively lower.

[0041] Finally, the elastic component adopts a single-side open structure, that is, the buffer layer wraps the elastic part and is folded in half to form an elastic component with a single-side open structure. Compared with the structure with closed sides, the single-side open structure is easier to process and can meet the needs of mass production. Although the single-side open structure will cause two extra non-woven fabric edges on one side, due to the wrapping of the outer covering layer, the extra non-woven fabric edges will not directly contact the skin, ensuring comfort.

[0042] The present invention improves the comfort level through process improvements, and improves the practicability of the present invention in terms of processing difficulty and processing cost, which is conducive to its popularization and application.

[0043] In terms of structure, the outer cladding of the present invention is a hollow structure, and the elastic member is arranged on the outer cladding and supports the outer cladding, so that the outer cladding forms a hollow tunnel structure; during use, the three-dimensional girdle of the present invention is not easy to topple, has good stability, and greatly reduces the situation of liquid leakage from the three-dimensional girdle due to the toppling or severe deformation of the three-dimensional girdle.

[0044] There are 6 - 10 elastic members in the elastic member, making the width of the elastic member wider. After the three-dimensional girdle of the present invention is adhered to the absorbent article, the three-dimensional girdle forms a tile-shaped trapezoid with a width at the upper end greater than that at the bottom, that is, a trapezoidal structure with a wider upper part and a narrower lower part, and the top surface and both side surfaces of the trapezoid are arc-shaped structures.

[0045] After wearing, a relatively airtight U-shaped space is formed between the absorbent article and the human body. When the user is walking, there will be an alternating situation of squeezing the absorbent article and relieving the pressure on the absorbent article; when the absorbent article is squeezed, the gas in the airtight space is discharged to the three-dimensional girdles on both sides, and the gas in the airtight space decreases; as the walking posture changes, when the human body does not exert pressure on the absorbent article, the originally squeezed three-dimensional girdle returns to its original position. The tile-shaped trapezoidal structure and the internal elastic member make the three-dimensional girdle of the present invention easier to return to its original state, and then the gas passes through the three-dimensional girdle and enters the airtight space to supplement the part of the gas that was originally discharged, producing a breathing-like effect.

[0046] Since the gas only needs to pass through two layers of the three-dimensional girdle of the present invention, it is easier for the gas to pass through the three-dimensional girdle and enter the airtight space between the absorbent article and the human body. During walking, the gas exchange volume in the airtight space is relatively larger, taking away more heat and water vapor and reducing the generation of odors.

[0047] When the user is walking or exercising, the deformation at the middle position of the three-dimensional girdle is relatively larger, and the deformation at both ends of the three-dimensional girdle is relatively smaller, so that buffer spaces are formed at both ends of the three-dimensional girdle. When the absorbent article is squeezed, a small amount of gas that enters the interior of the three-dimensional girdle and is not discharged will flow to the hollow tunnels at both ends of the three-dimensional girdle, rather than flowing back to the airtight space, improving the ventilation efficiency. And for the gas flowing to both ends, part of it will escape through the outer cladding, and the other part will flow back to the middle position of the three-dimensional girdle as the three-dimensional girdle returns to its original position and continue to escape for the second time.

[0048] After introducing the basic principle of the present invention, the following specifically introduces various non-limiting embodiments of the present invention. The quantity of any element in the drawings is for illustration rather than limitation, and any naming is only used for distinction without any limiting meaning.

[0049] The following elaborates in detail the principle and spirit of the present invention with reference to several representative embodiments of the present invention.

[0050] Example 1 of the elastic breathable three-dimensional side guard, absorbent article and its preparation process provided by the present invention:

[0051] As Figure 1 and Figure 2 shown, the elastic breathable three-dimensional side guard includes an outer covering layer 101 and an elastic member disposed within the outer covering layer 101.

[0052] As Figure 1 shown, the outer covering layer 101 is arranged in a closed ring shape on the left and right sides of the upper surface of the absorbent body 3, and a hollow structure is formed inside the outer covering layer 101;

[0053] In this embodiment, the outer covering layer 101 is a highly breathable non-woven fabric, preferably a hot air non-woven fabric. During production, the strip-shaped non-woven fabric is in an unfolded state, and the elastic member is attached to the outer covering layer 101 being conveyed in the unfolded state. Then, one side of the outer covering layer 101 is coated with glue and bonded to the other side of the outer covering layer 101, thereby forming a hollow structure that encloses the elastic member. Through this structure, it can adapt to large-scale continuous production and avoid being difficult to promote and use due to excessively high processing costs.

[0054] The elastic member is disposed within the outer covering layer 101. The elastic member includes a buffer layer 102 and an elastic member 103 wrapped within the buffer layer 102. In this embodiment, the number of elastic members 103 is 6. The buffer layer 102 is a water-repellent non-woven fabric, preferably a spunbond non-woven fabric. The elastic member 103 is spandex; the elastic member 103 fixed within the outer covering layer 101 is in a natural state so that when worn, the three-dimensional side guard 1 can still elongate or contract; it should be noted that elongation or contraction is relative. When the absorbent article 5 is unfolded and worn, the elastic member 103 in the three-dimensional side guard 1 will be slightly stretched. At this time, when the user is walking, the elastic member 103 will be stretched or contracted as they move.

[0055] As Figure 2 shown, the elastic member is horizontally disposed above the inner part of the outer covering layer 101. The width of the bottom of the outer covering layer 101 bonded to the absorbent body 3 is less than the width of the elastic member, so that the three-dimensional side guard 1 forms a trapezoidal structure that is narrower at the bottom and wider at the top, and the top and both sides of the trapezoidal three-dimensional side guard 1 are arc-shaped. This structure is not easy to topple, has good stability, greatly reduces the situation of liquid leakage from the three-dimensional side guard 1 due to the three-dimensional side guard 1 toppling or deforming severely, and has a large contact area with the skin, resulting in better comfort. In addition, this structure cooperates with the horizontally disposed elastic member and can better return to its original state after being squeezed.

[0056] The elastic member has a single-sided opening structure, that is, the buffer layer 102 wraps the elastic member 103 and is folded in half to form an elastic member with a single-sided opening structure. Compared with the two-sided closed structure, the single-sided opening structure has a lower processing difficulty and can meet the requirements of mass production. Although the single-sided opening structure will result in two redundant non-woven edges on one side, due to the wrapping of the outer covering layer 101, the redundant non-woven edges do not directly contact the skin, ensuring comfort.

[0057] This embodiment also discloses an absorbent article 5. The absorbent article 5 has the above-mentioned three-dimensional side guard 1. The absorbent article 5 includes, but is not limited to, sanitary napkins and light incontinence pads. The absorbent article 5 mainly includes, from top to bottom, the three-dimensional side guards 1 located on both sides, a surface layer 2, an absorbent body 3, and a bottom film 4.

[0058] This embodiment also discloses a preparation process of an absorbent article 5. The absorbent article 5 has the above-mentioned three-dimensional side guard 1. The preparation process of the absorbent article 5 includes the following steps:

[0059] Gluing, which is used to glue the absorbent article 5 to prepare for the fixation of the elastic member 103;

[0060] Virtual cutting, disconnecting the elastic member 103 through a virtual cutting component to make the elastic member 103 retract in advance to avoid the elastic member 103 being unable to retract after being fixed by peripheral sealing;

[0061] Peripheral sealing, which is used to seal the periphery of the absorbent article 5 and fix both ends of the three-dimensional side guard. The peripheral sealing embossing 6 is as Figure 4 shown;

[0062] Peripheral cutting, which is used to cut off the corner waste between two adjacent absorbent articles 5.

[0063] In this embodiment, there are two groups of virtual cutting components. Defining the length direction of the absorbent article 5 as the front-back direction, the two groups of virtual cutting components are symmetrically arranged on the left and right sides of the absorbent article 5. The virtual cutting component includes two virtual cutting knives 7. The two virtual cutting knives 7 are arranged in a V-shaped pattern. The V-shaped arrangement is to better match the shape of the absorbent article 5. The distance between the virtual cutting knife 7 and the edge of the absorbent article 5 is 0.5 - 100 mm (the distance between the virtual cutting knife 7 and the edge of the absorbent article 5 can be adjusted according to the actual situation. Calculate the distance from the virtual cutting knife 7 to the product edge and the distance of the peripherally sealed product during the time between virtual cutting and peripheral sealing based on the rebound speed of the spandex filament to obtain the distance from the virtual cutting knife 7 to the product edge; also consider the drying time of the glued edge).

[0064] Although this specification has shown and described several embodiments of the present invention, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, alterations, and alternative ways without departing from the spirit and scope of the present invention. It should be understood that various alternatives of the embodiments of the present invention described herein may be employed in practicing the present invention. The appended claims are intended to define the scope of protection of the present invention and thus cover the module components, equivalents, or alternatives within the scope of protection of these claims.

Claims

1. An elastic and breathable three-dimensional side guard, characterized in that, Comprising: An outer cladding layer (101) which is arranged in a closed ring shape on the left and right sides of the upper surface of the absorbent body (3), and a hollow structure is formed inside the outer cladding layer (101); An elastic member which is arranged inside the outer cladding layer (101), the elastic member includes a buffer layer (102) and an elastic member (103) wrapped inside the buffer layer (102), and the elastic member (103) fixed inside the outer cladding layer (101) is in a natural state so that when worn, the three-dimensional side guard (1) can still stretch or contract; The elastic member is horizontally arranged above the inner part of the outer cladding layer (101), and the width of the bottom of the outer cladding layer (101) bonded to the absorbent body (3) is smaller than the width of the elastic member, so that the three-dimensional side guard (1) forms a trapezoidal structure with a narrower bottom and a wider top, and the top and both side surfaces of the trapezoidal three-dimensional side guard (1) are arc-shaped.

2. The elastic and breathable three-dimensional side guard according to claim 1, characterized in that: The number of the elastic members (103) is 1 - 10.

3. The elastic and breathable three-dimensional side guard according to claim 2, wherein: The number of the elastic members (103) is 6 - 10.

4. The elastic and breathable three-dimensional side guard according to claim 1, wherein: The outer cladding layer (101) is a highly breathable non-woven fabric, preferably a thermal bonded non-woven fabric.

5. The elastic and breathable three-dimensional side guard according to claim 4, wherein: The outer cladding layer (101) is a strip-shaped highly breathable non-woven fabric, and the two long sides of the highly breathable thermal bonded non-woven fabric are bonded to each other to form a closed ring structure for wrapping the elastic member.

6. The elastic and breathable three-dimensional side guard according to claim 1, characterized in that: The buffer layer (102) is a spunbond non-woven fabric.

7. The elastic and breathable three-dimensional side guard according to claim 6, wherein: The elastic member is a single-side opening structure.

8. An absorbent article, characterized in that: The absorbent article (5) has the three-dimensional side guard (1) according to any one of claims 1 to 7.

9. A preparation process of an absorbent article, the absorbent article (5) has the three-dimensional side guard (1) according to any one of claims 1 to 7, and the preparation process of the absorbent article (5) includes the following steps: Gluing, which is used to glue the absorbent article (5) to prepare for the fixation of the elastic member (103); Perimeter sealing, which is used to seal the perimeter of the absorbent article (5); Perimeter cutting, which is used to cut off the corner waste between two adjacent absorbent articles (5); It is characterized in that a virtual cutting process is also provided between the gluing process and the perimeter sealing process. After gluing, the elastic member (103) is disconnected by a virtual cutting assembly, so that the elastic member (103) retracts in advance to avoid being unable to retract after being fixed by perimeter sealing.

10. The manufacturing process of the absorbent article according to claim 9, characterized in that: The virtual cutting assembly includes two virtual cutting knives (7), and the two virtual cutting knives (7) are arranged in a V shape; there are two groups of the virtual cutting assemblies. Defining the length direction of the absorbent article (5) as the front-back direction, the two groups of virtual cutting assemblies are symmetrically arranged on the left and right sides of the absorbent article (5).

Images