Disposable underpants

Abstract

The utility model discloses disposable underpants which are provided with an underpants body and comprise an outer layer sheet and an inner layer sheet which are arranged in a front waistline area, a rear waistline area and a crotch area, and a plurality of elastic plied yarns which are arranged between the outer layer sheet and the inner layer sheet and extend in the transverse direction. The outer-layer sheet is at least provided with a spun-bonded fiber layer; the denier number of the elastic plied yarns is 20-800 deniers, the plurality of elastic plied yarns are arranged at intervals, and the average plied yarn interval is 1-5 mm; and the inner-layer sheet is formed by compounding a second spun-bonded fiber layer and a second cotton fiber layer through a spunlace process. According to the utility model, the problems of low efficiency and insanitation caused by long-term manual multi-pass sewing of pure cotton underpants are solved, and continuous high-speed production can be realized.

Description

Technical Field

[0001] This patent relates to the field of clothing, and in particular to a new type of disposable underwear product. Background Art

[0002] For those who frequently travel for business or pleasure, changing and washing underwear is a significant inconvenience. Besides the time spent on long bus and boat rides, they often move from one location to another daily. Not only is there no access to laundry, but even if it were possible, drying them in the sun is a hassle and a real headache. Consequently, a market has emerged for disposable underwear that is easy to change and doesn't require washing. However, traditional disposable underwear production relies on manual labor, requiring fabric cutting and sewing. This not only results in low production efficiency but also makes it difficult to ensure the hygiene of the resulting disposable underwear. While underwear made from nonwoven materials can be produced continuously using mechanical equipment, they suffer from poor softness and sweat absorption compared to pure cotton products. Consequently, they are less comfortable to wear and have limited market acceptance. Therefore, there is a need to develop disposable underwear that can be automated like nonwoven underwear, improving efficiency and cleanliness while also enhancing wearer comfort. Summary of the Invention

[0003] In view of this, the present application aims to provide a new type of disposable underwear product, which has the advantages of high production efficiency and pure cotton products and has good market prospects.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a disposable underwear has mutually orthogonal front and back directions, transverse directions and up and down directions, and has a front waist region, a rear waist region and a crotch region, a waist opening formed by the front waist region and the rear waist region, and a leg opening formed by the front waist region, the rear waist region and the crotch region, and has:

[0005] The underpants body comprises an outer sheet arranged in the front waist region, the back waist region and the crotch region, an inner sheet, and a plurality of elastic strands arranged between the outer sheet and the inner sheet and extending in the transverse direction; the outer sheet comprises at least a spunbond fiber layer; the elastic strands have a denier of 20-800 denier, are arranged at intervals, and have an average strand spacing of 1mm-5mm; the inner sheet is formed by a second spunbond fiber layer and a second cotton fiber layer composited by a hydroentanglement process.

[0006] As an embodiment of the outer sheet, the outer sheet is a spunbonded nonwoven fabric with a grammage of 5-30 gsm.

[0007] As a preferred solution, the outer sheet is a composite material formed by a first spunbond fiber layer and a first cotton fiber layer through a hydroentanglement process, wherein the first spunbond fiber layer has a gram weight of 5-30 gsm and the first cotton fiber layer has a gram weight of 10-50 gsm.

[0008] To improve comfort, the second spunbond fiber layer in the inner sheet has a grammage of 5-30 gsm, and the second cotton fiber layer has a grammage of 10-30 gsm.

[0009] Furthermore, the ratio of the denier to the spacing of the elastic strands is 30-60.

[0010] Furthermore, the radial dimension of the elastic strands in a non-stretched state is 0.05-0.6 mm, and the elastic strands are arranged at intervals between the inner and outer sheets at a spacing of 3 rows / cm-7 rows / cm.

[0011] The elastic body is also included, which is arranged in the front waist area and the back waist area to improve the elasticity of the waist.

[0012] In order to improve the adsorption of sweat and secretions and improve privacy, a skin-friendly sheet fixed to the crotch area is also included.

[0013] The beneficial effects of the present invention are as follows: This invention solves the problem of pure cotton underwear long-standing reliance on multiple manual sewing processes, resulting in backward technology, high production costs, and unsafe and unhygienic conditions. This invention improves the underwear body material, wherein the outer sheet material comprises at least a spunbond fiber layer, and the inner sheet material is a composite of a spunbond fiber layer and a cotton fiber layer formed by a hydroentanglement process. High-density elastic yarn is preferably provided between the two layers of sheet material. Since the spunbond fibers can be fused together under heat pressing or ultrasonic waves, this lays the foundation for fully automatic, high-speed, and continuous production.

[0014] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a product diagram of the present utility model.

[0016] Figure 2 It is an expanded view of the utility model.

[0017] Figure 3 This is a transverse cross-sectional view of the underwear body of the present invention. DETAILED DESCRIPTION

[0018] The following terms can help to understand this application.

[0019] The term "dtex" as used herein, symbolized as dtex or "denier", is a measure used in the textile industry and refers to the weight in grams of 10,000 meters of fiber or yarn at a specified moisture regain.

[0020] "Average strand spacing" refers to the distance between the two ends of the elastic strands in the same cross-section of the underwear body material, divided by the number of strands in the cross-section minus one.

[0021] Example 1: Combination Figures 1 to 3 As shown, an embodiment of the present invention discloses a disposable underwear having mutually orthogonal front-back direction, lateral direction and up-down direction, such as Figure 1 As shown in the figure, the X direction is the horizontal direction, and the Y direction is the vertical direction. When in use, the side corresponding to the wearer's ventral side is the "front side", and the side corresponding to the wearer's back side is the "back side". Figure 2 As shown, the disposable underpants include an underpants body 1. When unfolded, the underpants body 1 can be divided into a front waist region A, a rear waist region B, and a crotch region C connecting the front waist region A and the rear waist region B. The left and right sides of the front waist region A and the rear waist region B in the X-direction are adhered to each other to form a sealing portion 10. The front waist region A and the rear waist region B together form a waist opening 20. Under the action of the sealing portion 10, the front waist region A, the rear waist region B, and the crotch region C form two left and right leg openings 20.

[0022] The underpants body 1 comprises an outer sheet 11 disposed in the front waist region A, the back waist region B, and the crotch region C; an inner sheet 12; and a plurality of elastic strands 13 extending transversely between the outer and inner sheets 11, 12. The outer sheet 11 is the side of the sheet that is away from the skin when worn, while the inner sheet 11 is the side of the sheet that is in contact with the skin when worn. The elastic strands 13 impart a certain degree of stretchability in the transverse direction to the disposable underpants, allowing them to better conform to the skin and enhance wearing comfort.

[0023] In order to improve the wearing comfort of the inner sheet 12, Figure 3 As shown, the inner sheet 12 is formed by a second spunbond fiber layer and a second cotton fiber layer through a hydroentanglement process. The hydroentanglement process is to spray high-pressure fine water onto one or more fiber webs to entangle the fibers, thereby strengthening the fiber web.

[0024] The specific material of the second cotton fiber layer is pure cotton fiber, which has strong hygroscopicity and flexibility. Therefore, as the inner sheet 12 in contact with the skin, it can not only absorb sweat, but also its soft texture can greatly improve the comfort of wearing. However, pure cotton fiber also has the defects of poor elasticity and easy deformation under stress and cannot be restored. At the same time, it is not hot-melt and cannot be compounded using ultrasonic welding and hot pressing. The material of the second spunbond fiber layer is the same as that of spunbond non-woven fabric and has hot-melt properties. Therefore, after the second cotton fiber layer is combined with the second spunbond fiber layer using the hydroentanglement process, the inner sheet 12 has both the comfort of pure cotton material and the hot-melt properties of spunbond fiber. The outer sheet 11 is a spunbond non-woven fabric and has hot-melt properties. Based on the hot melt properties of the outer sheet 11, the inner sheet 12 and the elastic strands 13, the outer sheet 11, the inner sheet 12 and the elastic strands 13 can be combined together by adhesive bonding or ultrasonic bonding. Therefore, the processing and molding technology of non-woven materials can be adopted to realize continuous and automated processing and production, thereby improving production efficiency and improving the cleanliness of the product.

[0025] The outer sheet material is spunbonded nonwoven fabric with a gram weight of 5-30 gsm. The gram weight of the second spunbonded fiber layer in the inner sheet material is 5-30 gsm, and the gram weight of the second cotton fiber layer is 10-30 gsm.

[0026] Since pure cotton fibers have poor elasticity and spunbond fibers are difficult to recover from deformation caused by external forces, wrinkles easily form. The elasticity of the elastic strands 13 can reduce the occurrence of wrinkles. The elastic strands 13 have a denier of 20-800 denier, and multiple elastic strands 13 are spaced apart, with an average strand spacing of 1mm-5mm. The ratio of elastic strand denier to strand spacing is 30-60. Within this ratio range, disposable underwear produced has fewer wrinkles and better results. The following is a set of optimal ratios selected during the experiment, such as a denier of 70 and a spacing of 2mm; a denier of 140 and a spacing of 2.5mm, both of which are within the above-mentioned preferred ratio ranges.

[0027] To further enhance comfort, the elastic strands 13 have a radial dimension of 0.05-0.6 mm in their unstretched state. They are arranged in warp order between the inner and outer sheets, with a spacing of 3-7 rows / cm. The elastic strands 13 are placed in a naturally contracted state between the outer and inner sheets 11, 12 and heat-sealed. A series of bonding points are formed at intervals along the elastic strands 13, connecting them to the outer and inner sheets 11, 12.

[0028] To enhance the secure fit of the waistband to the wearer's waist and prevent it from slipping or becoming loose during wear, an elastic member 2 is disposed transversely along the upper edges of the front waist region A and the back waist region B. The elastic member 2 is preferably, but not limited to, spandex elastic yarn; it can also be made of other elastic materials. The elastic member 2 is positioned between the outer sheet 11 and the inner sheet 12, extending laterally to the sealing portion 10. At the sealing portion 10, the elastic member 2 is secured to the outer and inner sheets 11, 12 via heat pressing or ultrasonic processing, forming fixed portions 21 at both ends. The portion of the elastic member 2 between the fixed portions is a flexible section. A series of bonding points 22 are formed between the flexible section and the outer and inner sheets 11, 12 via heat pressing or ultrasonic processing. These bonding points 22 secure the elastic member 2 to the outer and inner sheets 11, 12.

[0029] To further enhance wearing comfort, a skin-friendly sheet 3 is positioned on the inner side of the crotch region. The inner side here refers to the side that contacts the skin when worn. The skin-friendly sheet 3 can be made of a skin-friendly material such as cotton nonwoven fabric. The transverse width of the skin-friendly sheet 3 matches the width of the crotch region C, preferably the same width as the crotch region C. The sheet is secured to the inner sheet 12 of the crotch region C by gluing or ultrasonic welding. For ease of processing, the skin-friendly sheet 3 is preferably, but not limited to, rectangular.

[0030] Example 2: Combination Figures 1 to 3 As shown, another embodiment of the present invention discloses a disposable underpants having mutually orthogonal front-to-back directions, transverse directions, and up-down directions. The disposable underpants include an underpants body 1, the underpants body 1 including an outer sheet 11 disposed in a front waist region A, a rear waist region B, and a crotch region C, an inner sheet 12, and a plurality of elastic strands 13 extending transversely between the outer sheet 11 and the inner sheet 12.

[0031] The inner sheet 12 is formed by combining a second spunbond fiber layer and a second cotton fiber layer through a hydroentanglement process. The outer sheet 11 is also made of the same materials and process as the inner sheet 12, namely, it is a composite material formed by combining a first spunbond fiber layer and a first cotton fiber layer through a hydroentanglement process. The first spunbond fiber layer is made of the same material as spunbond nonwoven fabric, while the first cotton fiber layer is made of pure cotton fiber. The first spunbond fiber layer has a grammage of 5-30 gsm, and the first cotton fiber layer has a grammage of 10-50 gsm. Other aspects are the same as those of Example 1.

[0032] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A disposable underpants having mutually orthogonal front-back direction, transverse direction and up-down direction, and comprising a front waist region, a rear waist region and a crotch region, wherein a waist opening is formed by the front waist region and the rear waist region, and a leg opening is formed by the front waist region, the rear waist region and the crotch region, and wherein: It has: The panty body comprises an outer sheet disposed in the front waist region, the back waist region, and the crotch region, an inner sheet, and a plurality of elastic strands disposed between the outer sheet and the inner sheet and extending in the transverse direction; the outer sheet comprises at least a spunbond fiber layer; the elastic strands have a denier of 20-800 denier, are arranged at intervals, and have an average strand spacing of 1 mm to 5 mm; the inner sheet is formed by a second spunbond fiber layer and a second cotton fiber layer being hydroentangled; The outer sheet material is a spunbond nonwoven fabric with a gram weight of 5-30 gsm; the gram weight of the second spunbond fiber layer in the inner sheet material is 5-30 gsm, and the gram weight of the second cotton fiber layer is 10-30 gsm.

2. The disposable underwear according to claim 1, characterized in that: The outer sheet is a composite material formed by a first spunbond fiber layer and a first cotton fiber layer through a spunlace process. The first spunbond fiber layer has a gram weight of 5-30 gsm, and the first cotton fiber layer has a gram weight of 10-50 gsm.

3. The disposable underwear according to claim 1, characterized in that: The elastic strands have a denier to pitch ratio of 30-60.

4. The disposable underwear according to claim 3, characterized in that: The radial dimension of the elastic strands in a non-stretched state is 0.05-0.6 mm, and the elastic strands are arranged at intervals between the inner and outer sheets at a spacing of 3 rows / cm-7 rows / cm.

5. The disposable underwear according to claim 4, characterized in that: The elastic body is also included, which is arranged in the front waist area and the back waist area to improve the elasticity of the waist.

6. The disposable underwear according to claim 5, characterized in that: Also included is a skin-friendly sheet fixed to the crotch area.

7. The disposable underwear according to claim 1, characterized in that: The outer layer sheet material, the inner layer sheet material and the elastic strands are bonded or ultrasonically bonded.

Images