A disposable pant having a moisture absorbent fibrous sheet

Abstract

The utility model discloses a disposable underpants containing hygroscopic fiber sheet, including body and inner lining piece, along the thickness direction, the body includes the outer sheet of one side of non-skin side and the inner sheet of one side of skin side, the outer sheet and the inner sheet between the configuration of the first elastic line of multiple who extends along the transverse direction, along the longitudinal direction, multiple first elastic line, interval arrangement in front waist, crotch and back part, at least in front waist and back part, the outer sheet and the inner sheet between the configuration of the hygroscopic fiber sheet of the integrity of fiber organization structure being weakened, along the thickness direction, in the crotch configuration the inner lining piece, and the inner lining piece is located in the body skin side one side, and, in the area of crotch corresponding inner lining piece, the outer sheet and the inner sheet between not configuration hygroscopic fiber sheet. The utility model reduces the stuffy feeling of the wearer front waist and back part, avoids the crotch of crotch, the situation of wearing loose, reduces the thick heavy feeling of crotch, avoids the crotch corpulence, improves the comfort of the wearer crotch.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products, and in particular to disposable underwear products made primarily of nonwoven fabric, especially disposable underwear containing moisture-absorbing fiber sheets. Background Technology

[0002] Underwear is a common type of intimate clothing, typically characterized by its softness, comfort, and breathability. However, because it requires frequent washing and changing, it can be very inconvenient for frequent travelers. Disposable underwear perfectly meets these needs during special times, offering cleanliness, hygiene, and portability, while eliminating the hassle of daily washing and drying. Disposable underwear consists of a main body with a front waistband, crotch, and back panel. Generally, the main body comprises an outer layer, an inner layer, and multiple elastic bands sandwiched between the outer and inner layers.

[0003] Chinese utility model patent CN220831970U discloses a comfortable and seamless disposable underwear. According to the different requirements of the wearing parts, the outer layer is divided into upper waist, middle waist, lower waist and bottom areas, which correspond to the abdomen, hips, arms and crotch of the human body when wearing. According to the different wearing parts of the four areas, several fine denier elastic bands (also known as elastic lines) are set with different deniers to divide the elasticity, so that the overall shape is more in line with the human body and the comfort is stronger. However, since elastic bands are usually made of natural rubber or synthetic elastic fibers (such as spandex), these materials have a dense structure and are almost not breathable. Using finer (lower denier) elastic bands with smaller spacing (e.g., the first fine denier elastic band has a denier of 105-140D, and the spacing between adjacent first fine denier elastic bands is 1-4mm; the second fine denier elastic band has a denier of 105-210D, and the spacing between adjacent second fine denier elastic bands is 1-2mm), the more and denser the elastic bands, the larger the coverage area, which directly blocks the diffusion path of humid and hot air. This makes the breathability and moisture permeability of the front waist and back of disposable underwear worse, and local sweat cannot evaporate in time, increasing humidity and body temperature. This results in a stuffy feeling when wearing it, and in severe cases, it can cause skin rashes and a decreased experience. Utility Model Content

[0004] This utility model provides a disposable underwear containing a moisture-absorbing fiber sheet to solve the technical problems of poor breathability and moisture permeability of the front waist and back of existing disposable underwear, the inability of sweat to evaporate in time, and the problems of the crotch area being constricted and the underwear being loose.

[0005] The technical solution provided by this utility model is as follows:

[0006] One objective of this utility model is to provide a disposable underwear containing a moisture-absorbing fiber sheet, wherein the disposable underwear has mutually orthogonal longitudinal, transverse and thickness directions when unfolded.

[0007] The disposable underwear includes a main body and an inner lining; in the unfolded state, the main body has a front waist portion disposed on the abdominal side of the wearer, a back portion disposed on the back side of the wearer, and a crotch portion disposed between the front waist portion and the back portion in the longitudinal direction; in the transverse direction, the crotch portion has arc-shaped leg circumference lines on both sides.

[0008] Along the transverse direction, the front waist and the two sides of the back join together to form a side closure, so that the disposable underwear forms a waist opening and two leg openings;

[0009] Along the thickness direction, the body includes an outer sheet on the non-skin side and an inner sheet on the skin side; a plurality of first elastic lines extending laterally are disposed between the outer sheet and the inner sheet;

[0010] Along the longitudinal direction, multiple first elastic lines are arranged at intervals in the front waist, the crotch and the back;

[0011] Wherein, at least in the front waist and the back, a moisture-absorbing fiber sheet with weakened fiber structure integrity is disposed between the outer sheet and the inner sheet;

[0012] Along the thickness direction, the inner lining sheet is disposed in the crotch area, the inner lining sheet being located on the skin side of the body; and in the crotch area, in the region where the body and the inner lining sheet overlap, the moisture-absorbing fiber sheet is not disposed between the outer layer sheet and the inner layer sheet.

[0013] In a preferred embodiment, the hygroscopic fiber sheet in which the integrity of the fibrous structure is weakened includes weak regions and non-weak regions; the weak regions and non-weak regions are alternately distributed laterally, and / or the weak regions and non-weak regions are alternately distributed longitudinally.

[0014] In a preferred embodiment, the hygroscopic fiber sheet is a water-absorbing backing paper made of pulp fibers, or a natural cellulose fiber containing cotton or linen.

[0015] Alternatively, the hygroscopic fiber sheet may be a spunlace nonwoven fabric made of regenerated fibers containing viscose fiber, lyocell fiber, wood pulp fiber, and bamboo fiber.

[0016] In a preferred embodiment, the basis weight of the outer and inner sheets is 5 g / m². 2 ~60g / m 2 ;

[0017] When the absorbent fiber sheet is absorbent backing paper or natural cellulose fibers containing cotton or linen, the basis weight of the absorbent backing paper or natural cellulose fibers containing cotton or linen is 8–20 g / m². 2 ;

[0018] When the hygroscopic fiber sheet is a spunlace nonwoven fabric, the basis weight of the spunlace nonwoven fabric is 10-30 g / m². 2 .

[0019] In a preferred embodiment, when the disposable underwear retracts to its natural state, in the crotch area, the area where the body overlaps with the lining and the area outside the area where it overlaps with the lining, the body forms uneven wrinkles due to the rebound force of the first elastic line.

[0020] Along the thickness direction, the height of the folds formed in the area where the body and the inner liner overlap is higher than the height of the folds formed in the area outside the area where the body and the inner liner overlap.

[0021] In a preferred embodiment, a plurality of the first elastic threads are disposed on at least one side of the hygroscopic fiber sheet along the thickness direction.

[0022] In a preferred embodiment, along the thickness direction, a plurality of the first elastic threads are disposed on the side of the hygroscopic fiber sheet near the inner layer sheet;

[0023] At least in the front waist and the back, the hygroscopic fiber sheet is bonded to the outer sheet by a continuous or intermittent first adhesive;

[0024] At least in the front waist and the back, the moisture-absorbing fiber sheet, the first elastic thread, and the inner sheet are bonded together by a second adhesive.

[0025] In the area of ​​the crotch where the hygroscopic fiber sheet is not disposed, the outer sheet, the first elastic thread, and the inner sheet are bonded together by a second adhesive.

[0026] In a preferred embodiment, the first elastic thread has an average dtex of 100 dtex to 620 dtex; and the strand spacing between two adjacent first elastic threads is 1 mm to 6 mm along the longitudinal direction.

[0027] In a preferred embodiment, the body has a first center line extending laterally at its center along the longitudinal direction; and a second center line extending longitudinally at its center along the transverse direction.

[0028] The leg circumference line includes a concave arc segment that is recessed longitudinally toward the front waist; in the unfolded state, the concave arc segment intersects with the longitudinal edges on both sides of the front waist to form a first point, and the point on the concave arc segment that is farthest from the first center line is a second point.

[0029] Along the longitudinal direction, the difference between the vertical distance of the second point and the vertical distance of the first point and the first center line is 5mm to 30mm.

[0030] Furthermore, in the transverse direction, the vertical distance between the second point and the longitudinal edge of the front waist is less than the vertical distance between the second point and the second center line.

[0031] In a preferred embodiment, the inner liner is a single-layer structure, a double-layer composite structure, or a multi-layer composite structure.

[0032] The above-described technical solution of this utility model has at least the following beneficial effects compared with the prior art:

[0033] This invention provides a disposable underwear containing a moisture-absorbing fiber sheet. At least in the front waist and back, a moisture-absorbing fiber sheet with weakened fiber structure integrity is disposed between the outer and inner layers. When the wearer sweats, the moisture-absorbing fiber sheet in the front waist and back of the disposable underwear can quickly absorb moisture and diffuse it into the interior of the moisture-absorbing fiber sheet due to the weakened fiber structure integrity. This prevents moisture from accumulating on the skin side of the inner layer, reducing the stuffiness in the wearer's front waist and back, and avoiding the risk of rashes in the wearer's front waist and back.

[0034] This invention provides a disposable underwear containing a moisture-absorbing fiber sheet, with multiple first elastic threads arranged at intervals in the front waist, crotch, and back. The invention arranges multiple first elastic threads at intervals along the longitudinal direction in the crotch, thereby creating a lateral elastic area in the crotch. This avoids the crotch-gap problem and loose fit that occurs in existing disposable underwear due to the lack of elasticity, thus improving the fit and coverage of the crotch area.

[0035] This invention provides a disposable underwear containing a moisture-absorbing fiber sheet. In the crotch area, where the main body and the inner lining overlap, no moisture-absorbing fiber sheet is placed between the outer and inner layers. This avoids the crotch area from feeling constricted or loose due to reduced lateral elasticity and softness caused by the moisture-absorbing fiber sheet. Furthermore, the absence of a moisture-absorbing fiber sheet in the crotch area corresponding to the inner lining reduces the bulkiness of the crotch area, prevents it from feeling bulky, improves the wearer's comfort, and saves on the amount of moisture-absorbing fiber sheet material used, thus reducing processing costs.

[0036] This invention provides a disposable underwear containing a moisture-absorbing fiber sheet. In the crotch area, where the main body and the inner lining overlap, no moisture-absorbing fiber sheet is placed between the outer and inner layers. When the disposable underwear is shrunk to its natural state, the height of the pleats formed along the thickness direction in the area where the main body and the inner lining overlap is higher than the height of the pleats formed in the area outside the area where the main body and the inner lining overlap, thereby giving the front waist and back of the disposable underwear better flatness. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of a disposable underwear containing a moisture-absorbing fiber sheet in its unfolded state, according to this utility model.

[0039] Figure 2 This is a schematic diagram of the front waistband and the two sides of the back of a disposable underwear containing a moisture-absorbing fiber sheet, which are joined together to form a side seal. It is also a schematic diagram of the underwear when worn.

[0040] Figure 3 It is a disposable underwear edge containing moisture-absorbing fiber sheet. Figure 1 A schematic diagram of the cross-section in the T1-T1 direction.

[0041] Figure 4 It is a disposable underwear edge containing moisture-absorbing fiber sheet. Figure 1 A schematic diagram of the cross-section along the T2-T2 direction.

[0042] Figure 5 This is a photograph of the body in a stretched state in one embodiment, wherein the hygroscopic fiber sheet is a spunlace nonwoven fabric.

[0043] Figure 6 In another embodiment, a photograph shows the hygroscopic fiber sheet and the outer sheet in a stretched state after being peeled from the body, wherein the hygroscopic fiber sheet is a water-absorbing backing paper.

[0044] Figure 7 This is a schematic diagram of a portion of the front waist and crotch area of ​​a disposable underwear containing a moisture-absorbing fiber sheet in its unfolded state, according to this utility model. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0046] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0047] It should be noted that the terms "upper", "lower", "left", "right", "front", and "back" used in this utility model are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0048] Combination Figures 1 to 7 According to an embodiment of this utility model, a disposable underwear containing a moisture-absorbing fiber sheet is provided. The disposable underwear, when unfolded, has mutually orthogonal longitudinal, transverse, and thickness directions.

[0049] like Figure 1 , Figure 3 and Figure 4 As shown, the disposable underwear includes a main body 20 and an inner lining 10. In the unfolded state, the main body 20 has a front waist portion B1 disposed on the abdominal side of the wearer, a back portion B2 disposed on the back side of the wearer, and a crotch portion B3 disposed between the front waist portion B1 and the back portion B2 in the longitudinal direction. In the transverse direction, the crotch portion B3 has arc-shaped leg circumference lines 20a on both sides.

[0050] like Figure 1 and Figure 2 As shown, along the horizontal direction, the front waist section B1 and the back section B2 join together to form a side closure 30, so that the disposable underwear forms an underwear shape with a waist opening and two leg openings.

[0051] like Figure 3 and Figure 4 As shown, when the disposable underwear of this utility model is in an unfolded and stretched state, it has a skin side that has a contact surface with the human body (wearer) along the thickness direction, and a non-skin side that is away from the skin side.

[0052] like Figure 3 and Figure 4 As shown, according to an embodiment of the present invention, along the thickness direction, the body 20 includes an outer layer sheet 21 located on the non-skin side and an inner layer sheet 22 located on the skin side; a plurality of first elastic lines 24 extending laterally are disposed between the outer layer sheet 21 and the inner layer sheet 22.

[0053] Along the longitudinal direction, multiple first elastic threads 24 are arranged at intervals in the front waist area B1, crotch area B3, and back area B2. Along the longitudinal direction, the spacing between adjacent first elastic threads 24 is 1 mm to 6 mm. Preferably, in this embodiment, the first elastic threads 24 have an average denier of 100 dtex to 620 dtex.

[0054] This invention not only has multiple first elastic lines 24 arranged longitudinally at intervals in the front waist B1 and back B2, but also multiple first elastic lines 24 arranged longitudinally at intervals in the crotch B3, thereby giving the crotch B3 a lateral elastic area. This avoids the problem of the crotch B3 getting stuck and loose due to the lack of elasticity in the crotch B3 of existing disposable underwear, and improves the fit and wrapping properties of the crotch B3.

[0055] like Figure 3 As shown, according to an embodiment of the present invention, at least in the front waist B1 and the back B2, a moisture-absorbing fiber sheet 23 with weakened fiber structure integrity is disposed between the outer sheet 21 and the inner sheet 22.

[0056] According to an embodiment of the present invention, the hygroscopic fiber sheet 23 is a water-absorbing backing paper made of pulp fiber, or a natural cellulose fiber containing cotton or linen.

[0057] Alternatively, the hygroscopic fiber sheet 23 is a spunlace nonwoven fabric made of regenerated fibers containing viscose fiber, lyocell fiber, wood pulp fiber, and bamboo fiber.

[0058] In this embodiment, the absorbent fiber sheet 23 is preferably an absorbent backing paper. In other embodiments, the absorbent fiber sheet 23 is made of spunlace nonwoven fabric with printing or identification functions, which can enhance the aesthetics of shorts-type absorbent articles and improve product recognition.

[0059] The weakening of the fiber structure integrity of the hygroscopic fiber sheet 23 of this utility model refers to the fact that the hygroscopic fiber sheet 23 of the front waist B1 and the back B2 is flexibly processed through a flexible processing process, thereby weakening the fiber structure integrity of the hygroscopic fiber sheet 23 of the front waist B1 and the back B2 arranged between the outer layer sheet 21 and the inner layer sheet 22, forming a fragmented or "broken and connected" shape.

[0060] For example, in the flexible processing step, an extension roller with a concave-convex structure is used to perform flexible processing on the front waist B1 and the back B2. The breaking elongation of the hygroscopic fiber sheet 23 is 10% to 50%, and the breaking elongation of the outer layer sheet 21 and the inner layer sheet 22 is 40% to 150%. Moreover, the breaking elongation of the hygroscopic fiber sheet 23 is lower than that of the nonwoven fabric of the outer layer sheet 21 and the inner layer sheet 22. Therefore, the integrity of the fiber structure of the hygroscopic fiber sheet 23 can be effectively weakened by the flexible processing.

[0061] like Figure 3 and Figure 4 As shown, according to an embodiment of the present invention, the hygroscopic fiber sheet 23 with weakened fiber structure integrity includes a weak region 23a and a non-weak region 23b, wherein the fiber structure of the non-weak region 23b is denser than that of the weak region 23a.

[0062] The weak regions 23a and the non-weak regions 23b are distributed alternately in the horizontal direction, and / or the weak regions 23a and the non-weak regions 23b are distributed alternately in the vertical direction.

[0063] In some embodiments, the weak regions 23a and non-weak regions 23b are alternately distributed laterally. In other embodiments, the weak regions 23a and non-weak regions 23b are alternately distributed longitudinally.

[0064] In this embodiment, the weak region 23a and the non-weak region 23b are alternately distributed along the horizontal and vertical directions, as shown below. Figure 3 and Figure 4 As shown.

[0065] like Figure 5 As shown, the hygroscopic fiber sheet 23 is a spunlace nonwoven fabric. The weak area 23a and the non-weak area 23b are alternately distributed in the transverse direction. In the weak area 23a, the fiber structure of the hygroscopic fiber sheet 23 is weakened, and the fiber structure exhibits a "broken but connected" phenomenon.

[0066] like Figure 6As shown, the hygroscopic fiber sheet 23 is a water-absorbing backing paper made of pulp fibers. The weak area 23a and the non-weak area 23b are alternately distributed in the transverse direction. After the hygroscopic fiber sheet 23 and the outer layer sheet 21 are peeled off from the body 20, it can be clearly seen that the fiber structure of the hygroscopic fiber sheet 23 in the weak area 23a is weakened, and there are fragmented phenomena of breakage or voids between the fibers, thus forming a large gap.

[0067] The hydrophilicity of the outer layer 21 and the inner layer 22 is weaker than that of the hygroscopic fiber sheet 23, and the basis weight of the outer layer 21 and the inner layer 22 is 5 g / m². 2 ~60g / m 2 .

[0068] When the absorbent fiber sheet 23 is an absorbent backing paper or a natural cellulose fiber containing cotton or linen, the basis weight of the absorbent backing paper or the natural cellulose fiber containing cotton or linen (absorbent fiber sheet 23) is 8–20 g / m². 2 .

[0069] When the hygroscopic fiber sheet 23 is a spunlace nonwoven fabric, the basis weight of the spunlace nonwoven fabric (hygroscopic fiber sheet 23) is 10-30 g / m². 2 .

[0070] In other embodiments, the hygroscopic fiber sheet 23 may be pre-perforated or embossed, and then the front waist B1 and back B2 may be softened through a softening process, thereby making it easier to weaken the integrity of the fiber structure of the hygroscopic fiber sheet 23 and make the front waist B1 and back B2 more soft.

[0071] The hygroscopic fiber sheet 23, with its weakened fiber structure integrity, is fragmented or "interlocked" in shape, possessing a porous structure and relatively large gaps between the fiber structures. This results in good breathability and strong moisture absorption, giving the hygroscopic fiber sheet 23 superior moisture conduction and breathability. In this invention, at least between the outer layer 21 and inner layer 22 of the front waistband B1 and back back B2, the hygroscopic fiber sheet 23 with weakened fiber structure integrity is disposed. When sweat is released during wear, the hygroscopic fiber sheet 23 in the front waistband B1 and back back B2 areas of the disposable underwear can quickly absorb moisture and diffuse it into the interior of the hygroscopic fiber sheet 23, preventing moisture accumulation on the skin-side surface of the inner layer 22. This reduces the stuffiness in the front waistband B1 and back back B2 areas and avoids the risk of rashes in these areas.

[0072] Figure 1 , Figure 3 and Figure 4As shown, according to an embodiment of the present invention, an inner lining sheet 10 is disposed in the crotch area B3 along the thickness direction, and the inner lining sheet 10 is located on the skin side of the body 20. Furthermore, in the crotch area B3, in the region where the body 20 overlaps with the inner lining sheet 10, no moisture-absorbing fiber sheet 23 is disposed between the outer layer sheet 21 and the inner layer sheet 22, as... Figure 3 As shown.

[0073] According to an embodiment of the present invention, along the thickness direction, a plurality of first elastic threads 24 are disposed on at least one side of the hygroscopic fiber sheet 23.

[0074] Specifically, such as Figure 3 As shown, in this embodiment, along the thickness direction, multiple first elastic lines 24 are arranged on the side of the hygroscopic fiber sheet 23 near the inner layer sheet 22.

[0075] At least in the front waist section B1 and the back section B2, the moisture-absorbing fiber sheet 23 and the outer sheet 21 are bonded to each other by a first adhesive G1, either continuously or intermittently.

[0076] The first adhesive G1 is preferably a hot-melt adhesive, which is used to continuously or intermittently bond the hygroscopic fiber sheet 23 to the outer sheet 21. The hot-melt adhesive (first adhesive G1) can be continuously or intermittently applied to the outer sheet 21, or it can be continuously or intermittently applied to the hygroscopic fiber sheet 23.

[0077] At least in the front waist section B1 and the back section B2, the moisture-absorbing fiber sheet 23, the first elastic thread 24 and the inner layer sheet 22 are bonded together by the second adhesive G2.

[0078] The second adhesive G2 is preferably a hot-melt adhesive, which is used to bond the hygroscopic fiber sheet 23, the first elastic thread 24, and the inner layer sheet 22 together. The hot-melt adhesive (second adhesive G2) can be applied continuously or intermittently to the inner layer sheet 22, continuously or intermittently to the hygroscopic fiber sheet 23, or continuously to the outer periphery of the multiple first elastic threads 24.

[0079] In this embodiment, a hot melt adhesive (second adhesive G2) is continuously applied to the outer periphery of multiple first elastic threads 24, and the hygroscopic fiber sheet 23, the first elastic threads 24 and the inner layer sheet 22 are bonded together by the second adhesive G2.

[0080] In the area of ​​the crotch B3 where the hygroscopic fiber sheet 23 is not provided, the outer sheet 21, the first elastic thread 24 and the inner sheet 22 are bonded together by the second adhesive G2.

[0081] The second adhesive G2 is preferably a hot melt adhesive, which is used to bond the outer layer 21, the first elastic wires 24, and the inner layer 22 together. The hot melt adhesive (second adhesive G2) can be applied continuously or intermittently to the outer layer 21, the inner layer 22, or continuously to the periphery of the multiple first elastic wires 24.

[0082] In this embodiment, a hot melt adhesive (second adhesive G2) is continuously applied to the outer periphery of multiple first elastic lines 24, and the outer layer sheet 21, the first elastic lines 24 and the inner layer sheet 22 are joined together by the second adhesive G2.

[0083] like Figure 3 As shown, in this embodiment, along the longitudinal direction, the moisture-absorbing fiber sheet 23 disposed between the outer layer sheet 21 and the inner layer sheet 22 in the front waist B1 and the back B2 extends a portion toward the crotch B3.

[0084] In the crotch area B3, a portion of the hygroscopic fiber sheet 23 extending into the crotch area B3 is bonded to the outer layer sheet 21 by a continuous or intermittent first adhesive G1; a portion of the hygroscopic fiber sheet 23 extending into the crotch area B3, the first elastic thread 24, and the inner layer sheet 22 are bonded to each other by a second adhesive G2.

[0085] In this invention, in the crotch area B3, where the main body 20 overlaps with the inner lining 10, no moisture-absorbing fiber sheet 23 is placed between the outer layer 21 and the inner layer 22. This avoids the situation where the crotch area B3 becomes constricted or loose due to the presence of the moisture-absorbing fiber sheet 23, which would reduce its lateral elasticity and softness. Furthermore, the absence of the moisture-absorbing fiber sheet 23 in the crotch area B3 reduces the bulkiness of the crotch area B3, preventing it from feeling bulky and improving the wearer's comfort. It also saves on the amount of moisture-absorbing fiber sheet 23 used, reducing processing costs.

[0086] According to an embodiment of the present invention, when the disposable underwear shrinks back to its natural state, in the crotch area B3, the area where the body 20 overlaps with the inner lining 10 and the area outside the area where it overlaps with the inner lining 10, the body 20 forms concave and convex folds due to the rebound force of the first elastic line 24.

[0087] In this invention, in the crotch area B3, where the main body 20 overlaps with the inner lining 10, no moisture-absorbing fiber sheet 23 is disposed between the outer layer 21 and the inner layer 22. Along the thickness direction, the height of the pleats formed in the area where the main body 20 overlaps with the inner lining 10 is higher than the height of the pleats formed in the area outside the area where the main body 20 overlaps with the inner lining 10, thereby giving the front waistband B1 and back back B2 of the disposable underwear better flatness.

[0088] Combination Figure 3 and Figure 4 According to an embodiment of the present invention, in the crotch area B3, the inner lining sheet 10 and the inner surface of the inner layer sheet 22 are bonded to each other by a third adhesive G3, so that the inner lining sheet 10 is located on the skin side of the body 20.

[0089] Combination Figure 1 , Figure 3 and Figure 4 In the transverse direction, the contours of both sides of the inner lining 10 match the contour of the leg circumference line 20a of the crotch area B3. Furthermore, in the longitudinal direction, both sides of the inner lining 10 are joined to the inner layer 22 by a plurality of joints 4a.

[0090] Multiple joints 4a are formed by hot pressing or ultrasonic processes, which are used to reinforce and fix the inner liner 10 on both sides along the longitudinal direction and prevent curling at the edges.

[0091] In some embodiments, along the transverse direction, the two sides of the inner lining sheet 10 are joined to the inner layer sheet 22 by a plurality of joints 4a to prevent the inner lining sheet 10 from opening or cracking near the leg circumference line 20a.

[0092] The inner lining sheet 10 of this utility model can be a single-layer structure, a double-layer composite structure, or a multi-layer composite structure.

[0093] When the inner lining 10 is a single-layer structure, it can be a fabric or non-woven fabric made of absorbent or hydrophilic fibers.

[0094] When the inner liner 10 has a double-layer composite structure, it includes a liquid-permeable surface layer and a liquid-impermeable bottom layer. The liquid-permeable surface layer can be a fabric or nonwoven fabric made of absorbent or hydrophilic fibers, and the fabric or nonwoven fabric can be a single layer or a multi-layer structure. The liquid-impermeable bottom layer can be, for example, PE or PP plastic film, or spunbond nonwoven fabric containing a meltblown layer, or a composite film composed of nonwoven fabric and PE or PP plastic film, etc.

[0095] When the inner liner 10 has a multi-layer composite structure, it comprises a liquid-permeable surface layer, an intermediate absorbent layer, and a liquid-impermeable bottom layer. The liquid-permeable surface layer can be a fabric or nonwoven fabric made of absorbent or hydrophilic fibers, and the fabric or nonwoven fabric can be a single layer or a multi-layer structure. The liquid-impermeable bottom layer can be, for example, a PE or PP plastic film, or a spunbond nonwoven fabric containing a meltblown layer, or a composite film composed of nonwoven fabric and PE or PP plastic film. The intermediate absorbent layer can be composed of a layer containing absorbent fibers, a mixed layer of absorbent fibers and superabsorbent polymers, or a composite liquid-absorbing material layer containing superabsorbent polymers.

[0096] In this embodiment, the inner lining 10 has a multi-layer composite structure, which can provide the wearer with a drier experience.

[0097] Combination Figure 1 and Figure 7 According to an embodiment of the present invention, the body 20 has a first center line O1 (imaginary line) extending laterally at its center along the longitudinal direction. The body 20 also has a second center line O2 (imaginary line) extending longitudinally at its center along the transverse direction.

[0098] The leg circumference line 20a includes a concave arc segment 20a' that is recessed longitudinally towards the waist B1. In the unfolded state, the concave arc segment 20a' intersects with the longitudinal edges 20b on both sides of the front waist B1 to form a first point N1, and the point of the concave arc segment 20a' that is farthest from the first center line O1 is a second point N2.

[0099] Along the longitudinal direction, the difference between the perpendicular distance of the second point N2 to the first center line O1 and the perpendicular distance of the first point N1 to the first center line O1 is 5mm to 30mm. Furthermore, along the transverse direction, the perpendicular distance between the second point N2 and the longitudinal edge 20b of the front waist B1 is less than the perpendicular distance between the second point N2 and the second center line O2.

[0100] like Figure 1 and Figure 7 As shown, for example, draw a first imaginary line L1 parallel to the first center line O1 through the first point N1, and a second imaginary line L2 parallel to the first center line O1 through the second point N2. The distance between the first imaginary line L1 and the first center line O1 is d1 (i.e., the perpendicular distance between the first point N1 and the first center line O1), and the distance between the second imaginary line L2 and the first center line O1 is d2 (i.e., the perpendicular distance between the second point N2 and the first center line O1).

[0101] Since the concave arc segment 20a' is concave at the waist B1 along the longitudinal direction, the second point N2 is the point of the concave arc segment 20a' that is farthest from the first center line O1, therefore d2 > d1.

[0102] According to an embodiment of this utility model, 5mm < d2 - d1 < 30mm, that is, the difference between the vertical distance between the second point N2 and the first center line O1 and the vertical distance between the first point N1 and the first center line O1 is 5mm to 30mm.

[0103] Draw a third imaginary line L3 parallel to the second center line O2, passing through the second point N2. The distance between the third imaginary line L3 and the longitudinal edge 20b of the front waist B1 is d3 (i.e., the perpendicular distance between the second point N2 and the longitudinal edge 20b of the front waist), and the distance between the third imaginary line L3 and the second center line O2 is d4 (i.e., the perpendicular distance between the second point N2 and the second center line O2). That is, d3 < d4, meaning the perpendicular distance between the second point N2 and the longitudinal edge 20b of the front waist B1 is less than the perpendicular distance between the second point N2 and the second center line O2. In other words, the second point N2 is located closer to the longitudinal edge 20b of the front waist B1.

[0104] In the existing technology, the leg circumference line 20a is relatively smooth. When the wearer wears the disposable underwear for a long time or does some large-amplitude leg movements, the area near the front waist B1 of the leg circumference line 20a will become tight around the thigh, resulting in a poor wearing experience.

[0105] The present invention includes a concave arc segment 20a' that is recessed longitudinally towards the waist B1, thereby solving the problem of tightness in the thighs in the area of ​​the leg circumference line 20a near the front waist B1.

[0106] However, when d2-d1 > 30mm, the elasticity of the front waist B1 will be affected; when d2-d1 < 5mm, the area of ​​the leg circumference line 20a near the front waist B1 will feel tight around the thigh. In this invention, 5mm < d2-d1 < 30mm, meaning the difference between the vertical distance between the second point N2 and the first center line O1 and the vertical distance between the first point N1 and the first center line O1 is 5mm to 30mm, ensures that the elasticity of the front waist B1 is not affected, while preventing the leg circumference line 20a from feeling tight around the thigh near the front waist B1.

[0107] In this invention, d3 < d4, that is, the vertical distance between the second point N2 and the longitudinal edge 20b of the front waist B1 is less than the vertical distance between the second point N2 and the second center line O2 (the second point N2 is located closer to the longitudinal edge 20b of the front waist B1), so that the disposable underwear will not be too tight on the thighs when the wearer sits for a long time (such as office workers sitting for a long time).

[0108] like Figure 3 As shown, along the longitudinal direction, the outer layer 21 is folded towards the skin on both sides to form a folded portion 21a. Multiple second elastic lines 25 extending laterally are disposed between the folded portion 21a and the inner layer 22.

[0109] The bent portion 21a, the second elastic line 25, and the inner sheet 22 are joined together by a fourth adhesive G4. Along the longitudinal direction, the spacing between adjacent second elastic lines 25 is 3 mm to 8 mm. The multiple second elastic lines 25 have an average dtex of 310 to 940 dtex.

[0110] The following points need to be explained:

[0111] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0112] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention, i.e., these drawings are not drawn to actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "below" another element, the element may be "directly" located "on" or "below" the other element or there may be intermediate elements.

[0113] (3) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0114] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A disposable pair of underwear containing a moisture-absorbing fiber sheet, characterized in that, The disposable underwear, when unfolded, has mutually orthogonal longitudinal, transverse, and thickness directions; The disposable underwear includes a main body and an inner lining; in the unfolded state, the main body has a front waist portion disposed on the abdominal side of the wearer, a back portion disposed on the back side of the wearer, and a crotch portion disposed between the front waist portion and the back portion in the longitudinal direction; in the transverse direction, the crotch portion has arc-shaped leg circumference lines on both sides. Along the transverse direction, the front waist and the two sides of the back join together to form a side closure, so that the disposable underwear forms a waist opening and two leg openings; Along the thickness direction, the body includes an outer sheet on the non-skin side and an inner sheet on the skin side; a plurality of first elastic lines extending laterally are disposed between the outer sheet and the inner sheet; Along the longitudinal direction, multiple first elastic lines are arranged at intervals in the front waist, the crotch and the back; Wherein, at least in the front waist and the back, a moisture-absorbing fiber sheet with weakened fiber structure integrity is disposed between the outer sheet and the inner sheet; Along the thickness direction, the inner lining sheet is disposed in the crotch area, the inner lining sheet being located on the skin side of the body; and in the crotch area, in the region where the body and the inner lining sheet overlap, the moisture-absorbing fiber sheet is not disposed between the outer layer sheet and the inner layer sheet.

2. The disposable underwear according to claim 1, characterized in that, The hygroscopic fiber sheet in which the integrity of the fiber structure is weakened includes weak and non-weak regions; the weak and non-weak regions are alternately distributed in the transverse direction, and / or the weak and non-weak regions are alternately distributed in the longitudinal direction.

3. The disposable underwear according to claim 1, characterized in that, The absorbent fiber sheet is a water-absorbing backing paper made of pulp fiber, or a natural cellulose fiber containing cotton or linen. Alternatively, the hygroscopic fiber sheet may be a spunlace nonwoven fabric made of regenerated fibers containing viscose fiber, lyocell fiber, wood pulp fiber, and bamboo fiber.

4. The disposable underwear according to claim 3, characterized in that, The basis weight of the outer and inner layers is 5 g / m². 2 ~60g / m 2 ; When the absorbent fiber sheet is absorbent backing paper or natural cellulose fibers containing cotton or linen, the basis weight of the absorbent backing paper or natural cellulose fibers containing cotton or linen is 8–20 g / m². 2 ; When the hygroscopic fiber sheet is a spunlace nonwoven fabric, the basis weight of the spunlace nonwoven fabric is 10-30 g / m². 2 .

5. The disposable underwear according to claim 1, characterized in that, When the disposable underwear retracts to its natural state, in the crotch area, the area where the body overlaps with the inner lining and the area outside the area where it overlaps with the inner lining, the body forms uneven wrinkles due to the lateral rebound force of the first elastic line. Along the thickness direction, the height of the folds formed in the area where the body and the inner liner overlap is higher than the height of the folds formed in the area outside the area where the body and the inner liner overlap.

6. The disposable underwear according to claim 1, characterized in that, Along the thickness direction, a plurality of the first elastic threads are disposed on at least one side of the hygroscopic fiber sheet.

7. The disposable underwear according to claim 6, characterized in that, Along the thickness direction, a plurality of the first elastic threads are arranged on the side of the hygroscopic fiber sheet near the inner layer sheet; At least in the front waist and the back, the hygroscopic fiber sheet is bonded to the outer sheet by a continuous or intermittent first adhesive; At least in the front waist and the back, the moisture-absorbing fiber sheet, the first elastic thread, and the inner sheet are bonded together by a second adhesive. In the area of ​​the crotch where the hygroscopic fiber sheet is not disposed, the outer sheet, the first elastic thread, and the inner sheet are bonded together by a second adhesive.

8. The disposable underwear according to claim 1, characterized in that, The first elastic thread has an average dtex of 100 dtex to 620 dtex; along the longitudinal direction, the strand spacing between two adjacent first elastic threads is 1 mm to 6 mm.

9. The disposable underwear according to claim 1, characterized in that, Along the longitudinal direction, the center of the body has a first center line extending laterally; along the lateral direction, the center of the body has a second center line extending longitudinally. The leg circumference line includes a concave arc segment that is recessed longitudinally toward the front waist; in the unfolded state, the concave arc segment intersects with the longitudinal edges on both sides of the front waist to form a first point, and the point on the concave arc segment that is farthest from the first center line is a second point. Along the longitudinal direction, the difference between the vertical distance of the second point and the vertical distance of the first point and the first center line is 5mm to 30mm. Furthermore, in the transverse direction, the vertical distance between the second point and the longitudinal edge of the front waist is less than the vertical distance between the second point and the second center line.

10. The disposable underwear according to claim 1, characterized in that, The inner lining sheet is a single-layer structure, a double-layer composite structure, or a multi-layer composite structure.

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