Traceless underpants

Abstract

The seamless underpants comprise an underpants head and an elastic band, the elastic band is bonded to the underpants head through a first hot melt adhesive film, a dotted adhesive layer and a second hot melt adhesive film, bonding firmness is improved, degumming is not prone to occurring, the dotted adhesive layer is in a small particle shape, and air permeability and comfort are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underwear, in particular to seamless underwear. Background Art

[0002] The manufacturing process of related seamless underwear with full edging and visible ribs is to use a single piece of TPU hot melt adhesive film as the bonding carrier to achieve the bonding of elastic bands with a single single-layer through sheet. This process has problems such as insufficient bonding firmness and easy degumming after washing, especially when bonding on fabrics made of natural fiber materials such as regenerated cellulose fiber and cotton, which in turn affects consumer confidence, damages consumer interests, and results in low market recognition and low market share.

[0003] In addition, the single-piece polyurethane (TPU) hot-melt adhesive film is not breathable, which can easily cause stuffiness and sweat to remain on the skin, greatly affecting the wearing experience.

[0004] Furthermore, the monolithic polyurethane (TPU) hot melt adhesive film has poor temperature adaptability and will harden at low temperatures in winter, which will greatly affect the wearing experience. Utility Model Content

[0005] The utility model aims to provide a seamless underwear, wherein the elastic band is bonded to the waistband through a first hot melt adhesive film, a dot-shaped adhesive layer and a second hot melt adhesive film, so as to improve the bonding firmness and prevent debonding, and the dot-shaped adhesive layer is in the form of small particles, so as to improve the air permeability and comfort.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A seamless underwear, comprising a waistband and an elastic band;

[0008] A first hot melt adhesive film, a dotted adhesive layer and a second hot melt adhesive film are sequentially arranged on one side of the elastic band close to the waistband from top to bottom;

[0009] The dot-shaped glue layer is in the form of small particles.

[0010] In some embodiments, the first hot melt adhesive film is made of polyurethane TPU;

[0011] The material of the second hot melt adhesive film is polyurethane TPU.

[0012] In some embodiments, the material of the dot-shaped adhesive layer is PA.

[0013] In some embodiments, the dot-shaped adhesive layer covers the second hot melt adhesive film.

[0014] In some embodiments, the first hot melt adhesive film is aligned with the upper edge of the trouser waistband;

[0015] The second hot melt adhesive film is aligned with the lower edge of the elastic band.

[0016] In some embodiments, the upper edge of the elastic band is higher than the upper edge of the waistband.

[0017] In some embodiments, the distance between the upper edge of the elastic band and the upper edge of the waistband is 2 mm.

[0018] In some embodiments, the ratio of the width of the first hot melt adhesive film to the width of the elastic band is between 0.2 and 0.25;

[0019] The ratio of the width of the second hot-melt adhesive film to the width of the elastic band is between 0.2 and 0.25.

[0020] The utility model has the beneficial effects that the elastic band is bonded to the trouser waistband through the first hot melt adhesive film, the dot-shaped adhesive layer and the second hot melt adhesive film, so that the bonding firmness is improved and it is not easy to debond. Moreover, the dot-shaped adhesive layer is in the form of small particles, so that the air permeability and comfort are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a seamless underwear of the utility model;

[0022] Figure 2 This is a structural diagram of a seamless underwear of the utility model;

[0023] Figure 3 It is a cross-sectional view of the trouser waist and the elastic band of the utility model;

[0024] Figure 4 This is a structural diagram of the elastic band of the utility model near the waistband;

[0025] Among them: 1-waistband; 2-elastic band; 3-first hot melt adhesive film; 4-dot adhesive layer; 5-second hot melt adhesive film. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0027] refer to Figures 1 to 4 , a seamless underwear, comprising a waistband 1 and an elastic band 2;

[0028] A first hot melt adhesive film 3, a dotted adhesive layer 4 and a second hot melt adhesive film 5 are sequentially arranged on the side of the elastic band 2 close to the waistband 1 from top to bottom;

[0029] The dot-shaped glue layer 4 is in the form of small particles.

[0030] Therefore, the elastic band 2 is bonded to the waistband 1 through multiple sets of adhesive structures such as the first hot-melt adhesive film 3, the dot-shaped adhesive layer 4 and the second hot-melt adhesive film 5, so as to improve the bonding strength and prevent debonding. In addition, the dot-shaped adhesive layer 4 is in the form of small particles, which can also be understood as small dots or hollow shapes, so as to improve breathability and comfort.

[0031] The material of the first hot melt adhesive film 3 is polyurethane TPU, and the material of the second hot melt adhesive film 5 is polyurethane TPU. The provision of the hot melt adhesive film is conducive to the elastic band 2 being bonded to the trouser waist 1 conveniently, neatly and beautifully.

[0032] The material of the dot-shaped adhesive layer 4 is PA. PA material is environmentally friendly and has good temperature stability. In winter, when the temperature is low, the dot-shaped adhesive layer 4 is not easy to harden, thereby improving comfort.

[0033] Therefore, by combining polyurethane TPU with dispensing PA, their respective advantages can be brought into play, with good bonding strength, better resistance to washing water, not easy to debond, and good air permeability.

[0034] refer to Figure 3 The dot-shaped adhesive layer 4 covers the second hot-melt adhesive film 5, which is beneficial to further improve the bonding strength.

[0035] The first hot melt adhesive film 3 is aligned with the upper edge of the trouser waist 1, and the second hot melt adhesive film 5 is aligned with the lower edge of the elastic band 2, so as to improve the aesthetics and naturalness.

[0036] The upper edge of the elastic band 2 is higher than the upper edge of the waistband 1, further improving the aesthetics and naturalness.

[0037] Preferably, the distance D between the upper edge of the elastic band 2 and the upper edge of the trouser waist 1 is about 2 mm.

[0038] The ratio of the width of the first hot melt adhesive film 3 to the width of the elastic band 2 is between 0.2-0.25, and the ratio of the width of the second hot melt adhesive film 5 to the width of the elastic band 2 is between 0.2-0.25, thereby forming a relatively narrow hot melt adhesive film to ensure the convenience and firmness of bonding and improve comfort.

[0039] The above disclosure is only some embodiments of the utility model. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the utility model, and these all belong to the protection scope of the utility model.

Claims

1. A seamless underwear, characterized in that: It comprises a waistband (1) and an elastic band (2); The side of the elastic band (2) close to the waistband (1) is provided with a first hot melt adhesive film (3), a dotted adhesive layer (4) and a second hot melt adhesive film (5) in sequence from top to bottom; The dot-shaped glue layer (4) is in the form of small particles; The material of the first hot melt adhesive film (3) is polyurethane TPU; The material of the second hot melt adhesive film (5) is polyurethane TPU; The material of the dot-shaped glue layer (4) is PA.

2. A seamless underwear according to claim 1, characterized in that: The dot-shaped adhesive layer (4) covers the second hot-melt adhesive film (5).

3. The seamless underwear according to claim 1, characterized in that: The first hot melt adhesive film (3) is aligned with the upper edge of the trouser waist (1); The second hot-melt adhesive film (5) is aligned with the lower edge of the elastic band (2).

4. The seamless underwear according to claim 1, characterized in that: The upper edge of the elastic band (2) is higher than the upper edge of the waistband (1).

5. A seamless underwear according to claim 4, characterized in that: The distance between the upper edge of the elastic band (2) and the upper edge of the trouser waist (1) is 2 mm.

6. The seamless underwear according to claim 1, characterized in that: The ratio of the width of the first hot melt adhesive film (3) to the width of the elastic band (2) is between 0.2 and 0.25; The ratio of the width of the second hot-melt adhesive film (5) to the width of the elastic band (2) is between 0.2-0.25.

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