Tea polyphenol bacteriostatic and deodorant sanitary napkin core piece and sanitary napkin

Abstract

The utility model discloses a tea polyphenol bacteriostasis deodorization sanitary towel core piece and a sanitary towel, and belongs to the technical field of hygienic products, the tea polyphenol bacteriostasis deodorization sanitary towel core piece comprises a sanitary towel body and a core piece body arranged on the upper surface of the sanitary towel body, and the sanitary towel body is formed by tightly compounding a surface layer non-woven fabric, an absorption core body and a bottom layer in sequence from top to bottom. Wings are arranged on the two sides of the sanitary napkin body in the width direction, the absorption core body is formed by tightly compounding an upper diffusion layer, an absorption material, a bacteriostasis and deodorization layer, an absorption material and a lower diffusion layer in sequence from top to bottom, and the bacteriostasis and deodorization layer is a bamboo charcoal fiber net formed by weaving bamboo charcoal fibers; a plurality of fixing grooves are formed in the lower surface of the chip body, sustained-release micro-beads are arranged in the grooves, and each sustained-release micro-bead is composed of a micro-bead shell and tea polyphenol particles wrapped by the micro-bead shell; the upper surface of the chip body is provided with a plurality of liquid guide holes penetrating through the fixed groove; according to the sanitary towel, bacterium breeding and peculiar smell emission can be avoided in all directions, and the safety and comfort of the sanitary towel are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary products, in particular to a tea polyphenol antibacterial and deodorizing sanitary napkin chip and a sanitary napkin. Background Art

[0002] Sanitary napkins are absorbent materials. They are mainly used to absorb the menstrual blood that flows out of the vagina during menstruation. With the change of consumption concepts and the improvement of quality of life, modern women have higher and higher requirements for the functions of sanitary products. Sanitary napkins, as sanitary products for women, are no longer just functional products. Their safety and comfort have become important factors in measuring the quality of products. Among them, antibacterial and deodorizing properties are one of the important properties that sanitary napkins need to have. Good antibacterial and deodorizing properties can prevent users from experiencing symptoms such as itching, redness and swelling, as well as odor from sanitary napkins, and ensure the safety and comfort of sanitary napkins. Since sanitary napkins mainly absorb liquids through the absorbent core, some sanitary napkins only focus on the antibacterial and deodorizing properties of the absorbent core, and do not pay attention to the antibacterial and deodorizing properties of the surface layer of the sanitary napkin that contacts the human body, which still causes users to experience symptoms such as itching, redness and swelling, as well as odor from the sanitary napkins.

[0003] A Chinese patent with publication number CN210872491U discloses an antibacterial sanitary napkin, comprising a sanitary napkin body, the sanitary napkin body comprising a skin-friendly layer, a breathable layer is arranged on the surface of the skin-friendly layer, a flexible layer is arranged on the surface of the breathable layer, a liquid-repellent layer is arranged on the surface of the flexible layer, a first antibacterial layer is arranged on the surface of the liquid-repellent layer, a liquid-absorbing layer is arranged on the surface of the first antibacterial layer, a guide layer is arranged on the surface of the liquid-absorbing layer, and a second antibacterial layer is arranged on the surface of the guide layer; the antibacterial sanitary napkin has an antibacterial function through the first antibacterial layer and the second antibacterial layer, but the first antibacterial layer and the second antibacterial layer are mainly arranged around the liquid-absorbing layer and the guide layer for absorbing liquid, and the first antibacterial layer, which is closest to the human body, is separated by the skin-friendly layer, the breathable layer, the flexible layer, and the liquid-repellent layer, which easily leads to the growth of bacteria between the sanitary napkin and the human body, and then produces odor, so there is still room for improvement. Utility Model Content

[0004] In view of the technical defects existing in the background technology, the utility model proposes a tea polyphenol antibacterial deodorizing sanitary napkin chip and sanitary napkin, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] A tea polyphenol antibacterial and deodorizing sanitary napkin chip comprises a chip body, wherein the lower surface of the chip body is provided with a plurality of fixed grooves, wherein slow-release microbeads are arranged in the grooves, and the slow-release microbeads are composed of a microbead shell and a plurality of tea polyphenol particles wrapped in the microbead shell; and the upper surface of the chip body is provided with a plurality of liquid guide holes penetrating to the fixed grooves.

[0006] As a further technical solution of the utility model, the chip body is made of hot air non-woven fabric, and the upper surface of the chip body is coated with a hydrophobic agent to form a hydrophobic surface.

[0007] As a further technical solution of the utility model, the diameter of the sustained-release microbeads is 0.5-1 mm, and the diameter of the tea polyphenol particles is 0.05-0.1 mm.

[0008] As a further technical solution of the utility model, a first adhesive tape is provided at the edge of the lower surface of the chip body, and the first adhesive tape includes a first adhesive tape fixedly connected to the chip body and a first release paper on the lower surface of the first adhesive tape.

[0009] An antibacterial and deodorizing sanitary napkin, comprising a sanitary napkin body and a chip body arranged on the upper surface of the sanitary napkin body, wherein the sanitary napkin body is formed by a surface non-woven fabric, an absorbent core, and a bottom layer in sequence from top to bottom, and wings are arranged on both sides of the sanitary napkin body in the width direction, and the absorbent core is formed by an upper diffusion layer, an absorbent material, an antibacterial and deodorizing layer, an absorbent material, and a lower diffusion layer in sequence from top to bottom, and the antibacterial and deodorizing layer is a bamboo charcoal fiber net woven from bamboo charcoal fibers;

[0010] The lower surface of the chip body is provided with a plurality of fixed grooves, and sustained-release microbeads are arranged in the grooves. The sustained-release microbeads are composed of a microbead shell and tea polyphenol particles wrapped in the microbead shell; the upper surface of the chip body is provided with a plurality of liquid guide holes extending through the fixed grooves; the lower surface of the chip body is tightly fitted with the upper surface of the sanitary napkin body.

[0011] As a further technical solution of the utility model, the surface non-woven fabric is selected from spunlace non-woven fabric, and the upper surface of the surface non-woven fabric is provided with a guide groove extending along the length direction of the sanitary napkin body, and the upper surface of the surface non-woven fabric is closed and surrounded by an anti-side leakage groove along the edge of the absorbent core.

[0012] As a further technical solution of the utility model, the bottom layer is formed by tightly compounding a bottom layer of non-woven fabric and a waterproof breathable membrane in sequence from bottom to top.

[0013] As a further technical solution of the utility model, a plurality of second adhesive tapes are provided on the lower surface of the sanitary napkin body, and the second adhesive tapes include a second self-adhesive tape fixedly connected to the sanitary napkin body and a second release paper on the lower surface of the second self-adhesive tape, and the second adhesive tapes are respectively located on the lower surface of the bottom layer and the lower surface of the wing.

[0014] The beneficial effects of the utility model are:

[0015] The utility model combines a sanitary napkin body and a chip body into an antibacterial and deodorizing sanitary napkin. The chip body has good antibacterial and deodorizing functions due to the slow-release microbeads containing tea polyphenol particles. The chip body is arranged on the surface of the non-woven fabric of the upper layer of the sanitary napkin body, which can increase the antibacterial and deodorizing functions of the contact position between the sanitary napkin and the human body, and avoid symptoms such as itching, redness and swelling of the human body. The sanitary napkin body also has antibacterial and deodorizing functions by absorbing bacteria and decomposing odor molecules through the bamboo charcoal fibers of the antibacterial and deodorizing layer in the absorption core body, so that the sanitary napkin can completely avoid bacterial growth and odor emission, thereby improving the safety and comfort of the sanitary napkin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic diagram of the structure of a tea polyphenol antibacterial and deodorizing sanitary napkin chip.

[0017] Figure 2 The schematic diagram is a structural diagram of sustained-release microbeads of tea polyphenols antibacterial and deodorizing sanitary napkin chips.

[0018] Figure 3 The invention discloses a tea polyphenol antibacterial and deodorizing sanitary napkin chip and a width-direction cross-sectional view of the sanitary napkin.

[0019] Figure 4 The present invention is a cross-sectional view in the width direction of an antibacterial and deodorizing sanitary napkin.

[0020] Among them: chip body 1, sustained-release microbeads 11, microbead shell 111, tea polyphenol particles 112, liquid guide hole 12, hydrophobic surface 13, first adhesive tape 14, first self-adhesive label 141, first release paper 142, sanitary napkin body 2, surface non-woven fabric 21, guide groove 211, anti-side leakage groove 212, absorbent core 22, upper diffusion layer 221, absorbent material 222, antibacterial and deodorizing layer 223, lower diffusion layer 224, bottom layer 23, bottom non-woven fabric 231, waterproof and breathable membrane 232, wings 24, second adhesive tape 25, second self-adhesive label 251, second release paper 252. DETAILED DESCRIPTION

[0021] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0022] like Figure 1 , 2As shown, a tea polyphenol antibacterial and deodorizing sanitary napkin chip includes a chip body 1. The lower surface of the chip body 1 is provided with a plurality of fixed grooves, and sustained-release microbeads 11 are arranged in the grooves. The sustained-release microbeads 11 are composed of a microbead shell 111 and a plurality of tea polyphenol particles 112 wrapped in the microbead shell 111; the upper surface of the chip body 1 is provided with a plurality of liquid guide holes 12 that penetrate to the fixed grooves.

[0023] The chip body 1 of the utility model is used to be compounded on the surface of the surface layer of the sanitary napkin, and the upper surface of the chip body 1 is in direct contact with the human body. The specific compounding methods include but are not limited to adhesive bonding, hot pressing bonding, and ultrasonic bonding; the chip body 1 is usually made of non-woven fabric, and the lower surface of the chip body 1 can be formed into a plurality of fixed grooves by machine pressing and the like, and then an adhesive is applied to the fixed grooves or the fixed grooves are locally heated until the non-woven fabric fibers become a molten state, and then the sustained-release microbeads 11 are implanted into the fixed grooves and the sustained-release microbeads 11 are fixed to the chip body 1 after the adhesive is solidified or the non-woven fabric fibers are solidified. The microbead shell 111 is preferably a water-soluble material. During use by the user, blood flows to the upper surface of the chip body 1 and then penetrates into The sustained-release microbeads 11 come into contact with the blood, and the microbead shells 111 of the sustained-release microbeads 11 will gradually dissolve in the blood and release the tea polyphenol particles 112 inside. The tea polyphenol particles 112 contain tea polyphenol extracts, and the tea polyphenol particles 112 have the functions of antibacterial, anti-inflammatory, deodorizing and deodorizing, thereby preventing the chip body 1 from breeding bacteria and producing odors. The chip body 1 will be in direct contact with the human body, thereby preventing the user from experiencing symptoms such as itching, redness and swelling, and the sanitary napkin from emitting odors; the liquid guide holes 12 on the upper surface of the chip body 1 can promote the rapid downward penetration of blood, and the blood can better penetrate into the fixed grooves and contact with the sustained-release microbeads 11, and the tea polyphenol particles 112 are released by dissolving the microbead shells 11, so that the chip body 1 can effectively inhibit bacteria and deodorize.

[0024] The chip body 1 of the utility model has good antibacterial and deodorizing functions due to the slow-release microbeads 11 containing tea polyphenol particles 112. After the chip body 1 is set on the surface of the sanitary napkin, the antibacterial and deodorizing functions of the contact position between the sanitary napkin and the human body can be increased, thereby avoiding symptoms such as itching, redness and swelling in the human body and the sanitary napkin emitting odor, thereby improving the safety and comfort of the sanitary napkin.

[0025] like Figure 1 As shown, as one of the preferred embodiments of the utility model, the chip body 1 is made of hot air non-woven fabric, and a hydrophobic agent is coated on the upper surface of the chip body 1 to form a hydrophobic surface 13 .

[0026] The hot air non-woven fabric has good properties such as fluffiness, softness, water permeability, and breathability. After the chip body 1 is compounded on the surface of the sanitary napkin, it will be in direct contact with the human body, with a more comfortable touch and surface dryness, thereby improving comfort. The hot air non-woven fabric is preferably a two-component fiber non-woven fabric. The low-melting-point fiber in the two-component fiber can be more easily heated to a molten state, thereby adhering the slow-release microbeads 11 through the molten low-melting-point fiber to fix the slow-release microbeads 11 to the chip body 1; the upper surface of the chip body 1 is coated with a hydrophobic agent commonly used in sanitary products on the market to form a hydrophobic surface 13. The hydrophobic surface 13 can prevent liquid from staying on the surface of the chip body 1 and improve its surface dryness, thereby inhibiting the growth of bacteria between the chip body 1 and the human body.

[0027] As one of the preferred embodiments of the present invention, the diameter of the sustained-release microbeads 11 is 0.5-1 mm, and the diameter of the tea polyphenol particles 112 is 0.05-0.1 mm.

[0028] The sustained-release microbeads 11 of the utility model can be prepared in the following manner: tea polyphenol extract is uniformly dispersed in a sodium alginate solution, and then the sodium alginate solution dispersed with the tea polyphenol extract is sprayed to form small droplets and quickly dried, and the sodium alginate is obtained after the solvent in the small droplets evaporates and becomes solid to form a microparticle shell 111, and a number of tea polyphenol microparticles 112 containing tea polyphenol extract are wrapped inside, that is, the structure of the sustained-release microbeads 11 is that the microbead shell 111 wraps the tea polyphenol microparticles 112; the sodium alginate and tea polyphenol extract in the sustained-release microbeads 11 can be dissolved in the water in the blood, and the tea polyphenol extract can achieve antibacterial and deodorizing functions during the dissolution of the sustained-release microbeads 11.

[0029] like Figure 1 As shown, as one of the preferred embodiments of the utility model, a first adhesive tape 14 is provided on the edge of the lower surface of the chip body 1 , and the first adhesive tape 14 includes a first adhesive tape 141 fixedly connected to the chip body 1 and a first release paper 142 on the lower surface of the first adhesive tape 141 .

[0030] After the first adhesive tape 14 is arranged on the lower surface of the chip body of the utility model, it can be used more flexibly. When using the chip body 1, the first release paper 142 is torn off and adhered to the surface of the sanitary napkin through the first self-adhesive tape 141. It is used to improve the performance of some sanitary napkins with poor antibacterial and deodorizing functions, or use the chip body 1 in situations where bacteria are more easily bred, such as heavy menstrual flow or hot weather, to avoid bacteria breeding on the sanitary napkin.

[0031] like Figure 3 , 4As shown, an antibacterial and deodorizing sanitary napkin comprises a sanitary napkin body 2 and a chip body 1 arranged on the upper surface of the sanitary napkin body 2. The sanitary napkin body 2 is formed by a surface non-woven fabric 21, an absorbent core 22, and a bottom layer 23 tightly compounded from top to bottom. Wings 24 are arranged on both sides of the sanitary napkin body 2 in the width direction. The absorbent core 22 is formed by an upper diffusion layer 221, an absorbent material 222, an antibacterial and deodorizing layer 223, an absorbent material 222, and a lower diffusion layer 224 tightly compounded from top to bottom. The antibacterial and deodorizing layer 223 is a bamboo charcoal fiber net woven from bamboo charcoal fibers. A plurality of fixed grooves are arranged on the lower surface of the chip body 1, and slow-release microbeads 11 are arranged in the grooves. The slow-release microbeads 11 are composed of a microbead shell 111 and tea polyphenol particles 112 wrapped in the microbead shell 111. A plurality of liquid guide holes 12 penetrating to the fixed grooves are arranged on the upper surface of the chip body 1. The lower surface of the chip body 1 is tightly fitted with the upper surface of the sanitary napkin body 2.

[0032] The sanitary napkin body 2 and the chip body 1 of the utility model can be compounded with each other by adhesive bonding, hot pressing bonding, and ultrasonic bonding. The upper surface of the surface non-woven fabric 21 is tightly fitted with the lower surface of the chip body 1. Blood penetrates the chip body 1, the surface non-woven fabric 21, the upper diffusion layer 221 in sequence, and is then absorbed by the absorbent material 222 in the absorbent core 22. The absorbent material 222 is a mixture of absorbent resin and wood pulp. The absorbent resin can absorb a large amount of liquid, and the wood pulp can absorb the liquid while improving the comfort and structural stability of the absorbent core 22. The upper diffusion layer 221 and the lower diffusion layer 224 are spunbonded non-woven fabrics. The spunbonded non-woven fabric can effectively promote liquid diffusion, so that the liquid can be uniformly absorbed by the absorbent material 222. The antibacterial and deodorizing layer 223 in the absorbent core 22 is a bamboo charcoal fiber net woven from bamboo charcoal fibers. The bamboo charcoal can effectively adsorb bacteria and decompose odor molecules, thereby avoiding the growth of bacteria and the emission of odor in the absorbent core 22, thereby improving the antibacterial and deodorizing functions of the sanitary napkin body 2.

[0033] The utility model combines a sanitary napkin body 2 and a chip body 1 into an antibacterial and deodorizing sanitary napkin. The chip body 1 has good antibacterial and deodorizing functions due to the slow-release microbeads 11 containing tea polyphenol particles 112. The chip body 1 is arranged on the surface of the surface non-woven fabric 21 of the sanitary napkin body 2, which can increase the antibacterial and deodorizing functions of the contact position between the sanitary napkin and the human body, avoiding symptoms such as itching and redness of the human body. The sanitary napkin body 2 absorbs bacteria and decomposes odor molecules through the bamboo charcoal fibers of the antibacterial and deodorizing layer 223 in the absorption core 22, and also has antibacterial and deodorizing functions, so that the sanitary napkin can avoid bacterial growth and odor emission in all directions, thereby improving the safety and comfort of the sanitary napkin.

[0034] like Figure 4As shown, as one of the preferred embodiments of the utility model, the surface non-woven fabric 21 is made of spunlace non-woven fabric, and the upper surface of the surface non-woven fabric 21 is provided with a guide groove 211 extending along the length direction of the sanitary napkin body 2, and the upper surface of the surface non-woven fabric 21 is closed along the edge of the absorbent core 22 and is provided with an anti-side leakage groove 212.

[0035] The spunlace nonwoven fabric is soft and comfortable and has good water absorption and liquid diffusion promoting properties. It can quickly absorb liquid and diffuse it into the absorbent core 22 for absorption. Although the surface of the spunlace nonwoven fabric will be relatively moist after absorbing liquid, the sustained-release microbeads 11 in the chip body 1 are located on the side close to the surface nonwoven fabric 21. The moist surface nonwoven fabric 21 can better promote the dissolution of the sustained-release microbeads 11, thereby releasing more tea polyphenol extracts; the guide groove 211 and the anti-side leakage groove 212 on the surface of the surface nonwoven fabric 21 can be obtained by embossing technology. The guide groove 211 and the anti-side leakage groove 212 are both concave downward. The guide groove 211 is arranged near the center of the surface nonwoven fabric 21. The guide groove 211 can promote the flow and diffusion of liquid along the extension direction of the guide groove 211, and diffuse the liquid to a larger range for absorption, so that the absorbent core 22 can absorb liquid more evenly, and the anti-side leakage groove 212 can prevent the liquid on the surface of the surface nonwoven fabric 21 from continuing to flow and diffuse toward the edge and causing side leakage.

[0036] like Figure 4 As shown in FIG. 1 , as one of the preferred embodiments of the present invention, the bottom layer 23 is formed by tightly compounding a bottom layer non-woven fabric 231 and a waterproof breathable membrane 232 in sequence from bottom to top.

[0037] The bottom nonwoven fabric 231 of the present invention is made of hot air nonwoven fabric, which has good fluffiness and can improve the comfort of the sanitary napkin. The waterproof and breathable membrane 232 can prevent liquid from penetrating outside the bottom layer 23, while ensuring the breathability of the sanitary napkin.

[0038] like Figure 4 As shown, as one of the preferred embodiments of the utility model, a plurality of second adhesive tapes 25 are provided on the lower surface of the sanitary napkin body 2. The second adhesive tapes 25 include a second adhesive tape 251 fixedly connected to the sanitary napkin body 2 and a second release paper 252 on the lower surface of the second adhesive tape 251. The second adhesive tapes 25 are respectively located on the lower surface of the bottom layer 23 and the lower surface of the wings 24.

[0039] The second adhesive tape 25 of the utility model is used to fix the sanitary napkin to the underwear. When using the sanitary napkin, the second release paper 252 is torn off and adhered to the inner side of the underwear through the second adhesive tape 251 on the lower surface of the bottom layer 23. Then, the wings 24 are folded to the outside of the underwear and adhered to the outside of the underwear through the second adhesive tape 251 on the lower surface of the wings 24, thereby fixing the sanitary napkin to the underwear.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A tea polyphenol antibacterial and deodorizing sanitary napkin chip, comprising a chip body (1), characterized in that: The lower surface of the chip body (1) is provided with a plurality of fixed grooves, wherein slow-release microbeads (11) are arranged in the grooves, and the slow-release microbeads (11) are composed of a microbead shell (111) and a plurality of tea polyphenol particles (112) wrapped in the microbead shell (111); and the upper surface of the chip body (1) is provided with a plurality of liquid guide holes (12) extending through the fixed grooves.

2. The tea polyphenols antibacterial and deodorizing sanitary napkin chip according to claim 1, characterized in that: The chip body (1) is made of hot air non-woven fabric, and a hydrophobic agent is coated on the upper surface of the chip body (1) to form a hydrophobic surface (13).

3. The tea polyphenols antibacterial and deodorizing sanitary napkin chip according to claim 1, characterized in that: The diameter of the sustained-release microbeads (11) is 0.5-1 mm, and the diameter of the tea polyphenol particles (112) is 0.05-0.1 mm.

4. The tea polyphenols antibacterial and deodorizing sanitary napkin chip according to claim 1, characterized in that: A first adhesive tape (14) is provided at the edge of the lower surface of the chip body (1), and the first adhesive tape (14) comprises a first adhesive tape (141) fixedly connected to the chip body (1) and a first release paper (142) on the lower surface of the first adhesive tape (141).

5. An antibacterial and deodorizing sanitary napkin, characterized in that: The invention comprises a sanitary napkin body (2) and a chip body (1) arranged on the upper surface of the sanitary napkin body (2), wherein the sanitary napkin body (2) is formed by a surface non-woven fabric (21), an absorbent core (22), and a bottom layer (23) being tightly compounded in sequence from top to bottom, and wings (24) are provided on both sides of the sanitary napkin body (2) in the width direction, and the absorbent core (22) is formed by an upper diffusion layer (221), an absorbent material (222), an antibacterial and deodorizing layer (223), an absorbent material (222), and a lower diffusion layer (224) being tightly compounded in sequence from top to bottom, and the antibacterial and deodorizing layer (223) is a bamboo charcoal fiber net woven from bamboo charcoal fibers; The lower surface of the chip body (1) is provided with a plurality of fixed grooves, and the grooves are provided with slow-release microbeads (11), and the slow-release microbeads (11) are composed of a microbead shell (111) and tea polyphenol particles (112) wrapped in the microbead shell (111); the upper surface of the chip body (1) is provided with a plurality of liquid guide holes (12) extending through the fixed grooves; and the lower surface of the chip body (1) is tightly fitted with the upper surface of the sanitary napkin body (2).

6. The antibacterial and deodorizing sanitary napkin according to claim 5, characterized in that: The surface non-woven fabric (21) is a spunlace non-woven fabric, and the upper surface of the surface non-woven fabric (21) is provided with a guide groove (211) extending along the length direction of the sanitary napkin body (2), and the upper surface of the surface non-woven fabric (21) is provided with a closed anti-side leakage groove (212) along the edge of the absorbent core (22).

7. The antibacterial and deodorizing sanitary napkin according to claim 5, characterized in that: The bottom layer (23) is formed by tightly compounding a bottom layer non-woven fabric (231) and a waterproof breathable membrane (232) in sequence from bottom to top.

8. The antibacterial and deodorizing sanitary napkin according to claim 5, characterized in that: A plurality of second adhesive tapes (25) are provided on the lower surface of the sanitary napkin body (2), wherein the second adhesive tapes (25) comprise a second adhesive tape (251) fixedly connected to the sanitary napkin body (2) and a second release paper (252) on the lower surface of the second adhesive tape (251), and the second adhesive tapes (25) are respectively located on the lower surface of the bottom layer (23) and the lower surface of the wing (24).

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