Breathable non-woven fabric

Abstract

The breathable non-woven fabric comprises a base layer, a breathable layer and a moisture removal layer which are sequentially arranged from inside to outside, the breathable layer comprises a base surface and an upper convex part, the top end of the upper convex part is attached to the moisture removal layer, the upper convex part and the base layer form a breathable cavity, the base surface is attached to the base layer, and the base surface and the moisture removal layer form a moisture removal cavity. Under the same volume density, rough yarn counts of the base layer form a compact structure to absorb generated water vapor, the breathable layer forms a loose structure through spun yarn counts, the water vapor is evaporated through air circulation through the breathable cavity formed between the breathable layer and the base layer, and redundant water vapor is absorbed through the moisture removal cavity, so that the moisture absorption effect is improved. According to the non-woven fabric, a more compact moisture removal layer is formed through the roving yarns, moisture is discharged in combination with fiber characteristics, meanwhile, the compact structure can prevent external moisture from entering, and therefore the non-woven fabric which is breathable, capable of removing moisture and waterproof is formed.

Description

Technical Field

[0001] The utility model relates to the field of textiles, and more specifically, to a breathable non-woven fabric. Background Art

[0002] Existing non-woven fabrics usually adopt a single fiber web structure. After the fibers absorb water and swell, the interaction force between the staple fibers and the filaments decreases, resulting in poor breathability of the non-woven fabric. The water vapor of the non-woven fabric cannot be discharged, reducing the strength of the non-woven fabric. Moreover, the non-woven fabric formed by the single structure is often a single-layer structure, and the raw materials used are relatively single, so the waterproof property of the non-woven fabric is poor. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned existing technologies, and provide a breathable non-woven fabric. Through different fiber web reinforcements, a non-woven fabric is formed by three layers of fibers. At the same volume density, the base coarse yarn count forms a relatively tight structure to absorb the generated water vapor. The breathable layer forms a loose structure through the fine yarn count. Therefore, the water vapor is evaporated through the air flow in the breathable cavity formed between the breathable layer and the base layer, and the excess water vapor is absorbed through the moisture discharge cavity. A more compact moisture discharge layer is formed by the coarse yarn count, and the water vapor is discharged by combining the fiber characteristics. At the same time, the tight structure can block the intrusion of external water vapor, thus forming a non-woven fabric with breathability, moisture discharge and waterproof properties.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a breathable non-woven fabric, which comprises a base layer, a breathable layer and a moisture discharge layer arranged in sequence from inside to outside. The breathable layer includes a base surface and upper convex parts. The top ends of the upper convex parts are attached to the moisture discharge layer. The upper convex parts and the base layer form a breathable cavity. The base surface is attached to the base layer. The base surface and the moisture discharge layer form a moisture discharge cavity.

[0006] Further, the upper convex parts are hexagonal structures. In the 45-degree direction, the interval between two adjacent upper convex parts is 0.05 mm - 0.25 mm. In the longitudinal direction, the interval between two adjacent upper convex parts is 0.15 mm - 0.75 mm. In the transverse direction, the interval between two adjacent upper convex parts is also 0.15 mm - 0.75 mm.

[0007] Further, the base surface and the upper convex parts are arranged in a 1:1 staggered manner, and the height formed by the base surface and the moisture discharge layer is 0.25 mm - 0.62 mm. The height formed by the top ends of the upper convex parts and the base layer is 0.25 mm - 0.62 mm.

[0008] Further, the breathable layer is formed by cross-laying viscose fibers with a count of 50 - 60 English counts.

[0009] Further, the base layer is formed by horizontally laying 32 - 40 English cotton yarns through cross - lapping.

[0010] Further, the moisture - discharging layer is formed by obliquely laying 21 - 32 English polypropylene fibers through cross - lapping, and the longitudinal fibers and the transverse fibers are arranged in a cross pattern at an angle of 45° - 90°.

[0011] Further, the basis weight of the non - woven fabric formed by the base layer, the breathable layer and the moisture - discharging layer is 30 g / m² - 85 g / m².

[0012] The beneficial effects of the present utility model are as follows:

[0013] By laying and reinforcing different fibers at the same volume density to form a non - woven fabric with three layers of fibers, and due to the same volume density, the tightness of the structure formed between the three layers is different. The base layer with a slightly tight structure absorbs water vapor and transports it to the breathable layer. The loose structure of the breathable layer forms breathable cavities and moisture - discharging cavities, which evaporate and transport the water vapor to the moisture - discharging layer. The tight structure of the moisture - discharging layer combined with the fibers not only discharges the water vapor absorbed by the base layer but also blocks the intrusion of external water vapor, making the non - woven fabric integrated with functions of breathability, moisture - discharging and waterproofing. Description of the Drawings

[0014] Figure 1 It is a schematic structural view of a breathable non - woven fabric in this embodiment;

[0015] Figure 2 It is a top view of the breathable layer of a breathable non - woven fabric in this embodiment;

[0016] Figure 3 It is a top view of the skin - friendly layer of a breathable non - woven fabric in this embodiment;

[0017] Figure 4 It is a top view of the moisture - discharging layer of a breathable non - woven fabric in this embodiment.

[0018] Reference Signs:

[0019] Skin - friendly layer 100, breathable layer 200, base surface 211, upper convex part 212, moisture - discharging layer 300, moisture - discharging cavity 400, breathable cavity 500. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] As shown Figure 1 —in Figure 4, a breathable non-woven fabric includes a base layer 100, a breathable layer 200, and a moisture-wicking layer 300 arranged in sequence from the inside out. Referring to Figure 3 , the base layer 100 is formed by horizontal web laying. A non-woven fabric is formed by using a simple web laying structure. The base layer 100 is not easily deformed, laying a good foundation for the whole non-woven fabric, and can be better combined with the breathable layer 200 and the moisture-wicking layer 300. Moreover, the cost of horizontal web laying is relatively low. The base layer 100 is made of cotton fibers with a yarn count of 32s - 40s. Preferably, cotton fibers with a yarn count of 32s are used. The breathable layer 200 is made of viscose fibers with a yarn count of 50s - 60s. Preferably, viscose fibers with a yarn count of 50s are used. The moisture-wicking layer 300 is made of polypropylene fibers with a yarn count of 21s - 32s. Preferably, polypropylene fibers with a yarn count of 21s are used. The yarn count of the base layer 100 is less than that of the moisture-wicking layer 300 but greater than that of the breathable layer 200. Therefore, the formed fiber web is relatively tight. And the base layer 100 is made of cotton fibers, so it can absorb more water vapor and penetrate it to the breathable layer 200. And because the medium yarn count can also transport the water vapor to the breathable layer 200 through the gaps under the same volume density.

[0022] Referring to Figure 2 , the breathable layer 200 includes a base surface 211 and upper convex parts 212. The upper convex parts 212 are hexagonal structures. In the 45-degree direction, the interval between two adjacent upper convex parts 212 is 0.05 mm - 0.25 mm. Preferably, the interval between two adjacent upper convex parts 212 is 0.05 mm. In the longitudinal direction, the interval between two adjacent upper convex parts 212 is 0.15 mm - 0.75 mm. Preferably, the interval between two adjacent upper convex parts 212 is 0.15 mm. In the transverse direction, the interval between two adjacent upper convex parts 212 is also 0.15 mm - 0.75 mm. Preferably, the interval between two adjacent upper convex parts 212 is 0.15 mm. And these intervals are all the base surface 211. Therefore, due to the existence of the base surface 211 between two adjacent upper convex parts 212, the base surface 211 absorbs the water vapor penetrated by the base layer 100. The base surface 211 fits the base layer 100, and the base surface 211 and the moisture-wicking layer 300 form a height of 0.25 mm - 0.62 mm. Preferably, the height is 0.3 mm. Therefore, the base surface 211 and the moisture-wicking layer 300 form a moisture-wicking cavity 400. Therefore, while the base surface 211 absorbs the water vapor of the base layer 100, it stores the water vapor in the moisture-wicking cavity 400, enabling the base surface 211 to absorb more water vapor so that the base layer 100 remains dry. The water vapor in the moisture-wicking cavity 400 captures and evaporates the water vapor through the breathable cavity 500, and at the same time captures and discharges the water vapor through the fiber characteristics of the moisture-wicking layer 300.

[0023] Referring to Figure 1, the base surface 211 and the upper convex part 212 are arranged in a 1:1 staggered pattern. The top of the upper convex part 212 is in contact with the moisture discharge layer. The upper convex part 212 and the base layer 100 form a height of 0.25 mm - 0.62 mm, preferably 0.3 mm. Therefore, the upper convex part 212 and the base layer 100 form a ventilation cavity 500. Thus, after the base surface 211 absorbs the water vapor permeated from the base layer 100, the upward ventilation cavity 500 forms an air flow, so as to evaporate the water vapor through the external air. The ventilation layer 200 is formed by cross-laying fibers and uses viscose fibers of 50 - 60 English counts, preferably 50 English counts. Because the ventilation layer 200 uses the finest yarn count, under the same volume density, the formed fiber network structure is the loosest. Thus, not only can the base surface 211 quickly transport the water vapor, and the water vapor is circulated through the adjacent ventilation cavities 500 to quickly evaporate the water vapor, but the excess water vapor can also be quickly transported to the moisture discharge layer 300. Through the fiber characteristics of the moisture discharge layer 300, the water vapor is absorbed and discharged. At the same time, the ventilation cavity 500 can pass more air, not only discharging the water vapor permeated from the base layer 100 through evaporation by the external air, but also transmitting the water vapor stored in the moisture discharge cavity 400 to the ventilation cavity 500 through the sparse fiber network and discharging the water vapor through evaporation by the external air, so as to keep the non-woven fabric breathable and moisture-permeable all the time.

[0024] Refer to Figure 4 , the moisture discharge layer 300 is formed by laying fibers in an oblique cross pattern, and the longitudinal fibers and the transverse fibers are arranged in a cross pattern at an angle of 45° - 90°, preferably 45°. And the moisture discharge layer 300 uses polypropylene fibers of 21 - 32 English counts, preferably 21 English counts. Therefore, under the same volume density, the fiber network structure of the moisture discharge layer 300 is the densest, so that the external water vapor cannot enter, forming a waterproof effect. And because of the 45° cross arrangement, after becoming a non-woven fabric, the moisture discharge layer 300 will be uneven, so that the external air can enter the ventilation layer 200, so that the ventilation cavity 500 evaporates the water vapor along with the air flow. And because the moisture discharge layer 300 uses polypropylene fibers, the excess water vapor absorbed by the moisture discharge cavity 400 can be sucked and discharged from the inner layer through the fibers.

[0025] The non-woven fabric formed by the base layer 100, the ventilation layer 200 and the moisture discharge layer 300 has a gram weight of 30 g / m² - 85 g / m², preferably 40 g / m². Under the same volume density, fiber networks with different density structures are formed without increasing the gram weight of the non-woven fabric, so that the non-woven fabric will not be thick and heavy due to multiple layers, and the three layers form a breathable, moisture-permeable and waterproof non-woven fabric.

[0026] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A breathable nonwoven fabric, characterized in that: The invention comprises a base layer (100), a breathable layer (200), and a moisture-dissipating layer (300) which are arranged in sequence from the inside to the outside. The breathable layer (200) comprises a base surface (211) and an upper convex portion (212). The top end of the upper convex portion (212) is attached to the moisture-dissipating layer (300). The upper convex portion (212) and the base layer (100) form a breathable cavity (500). The base surface (211) is attached to the base layer (100). The base surface (211) and the moisture-dissipating layer (300) form a moisture-dissipating cavity (400).

2. A breathable nonwoven fabric according to claim 1, characterized in that: The upper protrusion (212) is a hexagonal structure. In the 45-degree direction, the interval between two adjacent upper protrusions (212) is 0.05mm-0.25mm, in the longitudinal direction, the interval between two adjacent upper protrusions (212) is 0.15mm-0.75mm, and in the transverse direction, the interval between two adjacent upper protrusions (212) is also 0.15mm-0.75mm.

3. A breathable nonwoven fabric according to claim 1, characterized in that: The base surface (211) and the upper convex portion (212) are arranged in a staggered manner at a ratio of 1:1, and the height formed by the base surface (211) and the moisture-dissipating layer (300) is 0.25 mm to 0.62 mm, and the height formed by the top of the upper convex portion (212) and the base layer (100) is 0.25 mm to 0.62 mm.

4. A breathable nonwoven fabric according to claim 1, characterized in that: The air permeable layer (200) is formed by cross-laying viscose fibers with a count of 50 to 60.

5. A breathable nonwoven fabric according to claim 1, characterized in that: The base layer (100) is formed by transversely laying a web using cotton fibers with a count of 32 to 40.

6. A breathable nonwoven fabric according to claim 1, characterized in that: The moisture-discharging layer (300) is formed by using 21-32 ne polypropylene fibers through diagonal laying, and the longitudinal fibers and the transverse fibers are cross-arranged at an angle of 45 degrees to 90 degrees.

7. A breathable nonwoven fabric according to claim 1, characterized in that: The non-woven fabric formed by the base layer (100), the breathable layer (200) and the moisture-dissipating layer (300) has a gram weight of 30 g / m^2-85 g / m^2.

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