Breathable and moisture-permeable PU synthetic leather

Abstract

The utility model discloses a kind of breathable and moisture-permeable PU synthetic leather, it includes surface layer, polyurethane coating and base cloth, the polyurethane coating is located on base cloth upper surface, bonding layer is equipped between the polyurethane coating and base cloth, and polyurethane coating and base cloth are adhered by bonding layer, the surface layer is located in the side of polyurethane coating away from base cloth, the side of surface layer away from polyurethane coating is coated with hydrophobic coating, the polyurethane coating has microporous structure, and the polyurethane coating is inlaid with several hydrophilic fiber bundles. By the microporous structure in polyurethane coating, polyurethane coating is breathable and moisture-permeable, hydrophobic coating makes liquid water unable to stay on synthetic leather surface, avoids liquid water to pass through synthetic leather by microporous structure, so that synthetic leather has good waterproofness.

Description

Technical Field

[0001] This utility model relates to the field of PU synthetic leather technology, and in particular to a breathable and moisture-wicking PU synthetic leather. Background Technology

[0002] Polyurethane (PU) synthetic leather belongs to a type of polyurethane elastomer. It has a soft, natural luster, a soft feel, and a strong leather-like appearance. It has excellent mechanical properties such as good adhesion to the substrate, abrasion resistance, flexural resistance, and aging resistance. At the same time, it also has the advantages of good cold resistance, breathability, washability, easy processing, and low price, making it the most ideal substitute for natural leather.

[0003] In the production process of PU synthetic leather, a foaming agent is added to polyurethane resin to create a microporous structure. The microporous structure provides PU synthetic leather with breathability and moisture permeability, but the microporous structure also reduces the waterproofness of PU synthetic leather, resulting in a decrease in breathability and moisture permeability after long-term use. Utility Model Content

[0004] The purpose of this invention is to provide a breathable and moisture-permeable PU synthetic leather that can provide waterproof properties while ensuring good breathability and moisture permeability.

[0005] To achieve the above objectives, a breathable and moisture-permeable PU synthetic leather is provided, comprising a top layer, a polyurethane coating, and a base fabric. The polyurethane coating is disposed on the upper surface of the base fabric, and an adhesive layer is provided between the polyurethane coating and the base fabric, bonding the polyurethane coating and the base fabric through the adhesive layer. The top layer is disposed on the side of the polyurethane coating away from the base fabric, and a hydrophobic coating is applied to the side of the top layer away from the polyurethane coating. The polyurethane coating has a microporous structure and embeds several hydrophilic fiber bundles within it. This provides waterproof properties while ensuring good breathability and moisture permeability of the PU synthetic leather.

[0006] According to the aforementioned breathable and moisture-permeable PU synthetic leather, the base fabric is a non-woven material, and antistatic fibers are woven into the base fabric. The fibers of the non-woven material form dense microporous channels, giving the base fabric excellent moisture permeability.

[0007] According to the aforementioned breathable and moisture-permeable PU synthetic leather, the surface layer away from the polyurethane coating has a leather-like pattern. This is used to simulate synthetic leather.

[0008] According to the aforementioned breathable and moisture-permeable PU synthetic leather, the microporous structure within the polyurethane coating is formed by a wet process. This microporous structure within the polyurethane coating provides breathability and moisture permeability to the polyurethane coating.

[0009] The above solution has the following advantages: the microporous structure within the polyurethane coating allows the polyurethane coating to be breathable and moisture-permeable, while the hydrophobic coating prevents liquid water from remaining on the surface of the synthetic leather, thus preventing liquid water from passing through the synthetic leather via the microporous structure and giving the synthetic leather good water resistance.

[0010] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0012] Figure 1 This is a perspective view of a breathable and moisture-wicking PU synthetic leather according to the present invention;

[0013] Figure 2 This is a front view of a breathable and moisture-wicking PU synthetic leather according to this utility model;

[0014] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0015] Legend:

[0016] 1. Surface layer; 2. Polyurethane coating; 3. Base fabric; 4. Antistatic fiber; 5. Adhesive layer; 6. Hydrophilic fiber bundle; 7. Hydrophobic coating. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] Reference Figure 1-3 This utility model provides a breathable and moisture-permeable PU synthetic leather, which includes a surface layer 1, a polyurethane coating 2, and a base fabric 3. The polyurethane coating 2 is disposed on the upper surface of the base fabric 3, and an adhesive layer 5 is provided between the polyurethane coating 2 and the base fabric 3. The polyurethane coating 2 and the base fabric 3 are bonded together by the adhesive layer 5. The surface layer 1 is disposed on the side of the polyurethane coating 2 away from the base fabric 3. A hydrophobic coating 7 is coated on the side of the surface layer 1 away from the polyurethane coating 2. The polyurethane coating 2 has a microporous structure and a plurality of hydrophilic fiber bundles 6 are embedded in the polyurethane coating 2.

[0019] The base fabric 3 is a non-woven material, and antistatic fibers 4 are woven into the base fabric 3. The fibers of the non-woven material form dense microporous channels, giving the base fabric 3 good moisture permeability.

[0020] The surface of the top layer 1, away from the polyurethane coating 2, has a leather-like pattern. This is used to simulate synthetic leather.

[0021] The microporous structure within the polyurethane coating 2 is formed through a wet process. This microporous structure within the polyurethane coating 2 provides it with air and moisture permeability.

[0022] Working principle: When in use, the surface layer 1 of the synthetic leather faces outward. Heat and sweat move through the microporous structure of the base fabric 3 and the polyurethane coating 2 to the surface layer 1 for discharge. The hydrophobic coating 7 causes liquid water falling on the surface layer 1 of the synthetic leather to roll off, preventing liquid water from moving through the microporous structure to the base fabric 3 side. The hydrophilic fiber bundles 6 improve the water absorption of the polyurethane coating 2, and together with the hydrophobic coating 7, achieve the one-way sweat-wicking effect of the polyurethane coating 2.

[0023] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A breathable and moisture-permeable PU synthetic leather, comprising: The surface layer (1), polyurethane coating (2), and base fabric (3) are characterized in that the polyurethane coating (2) is disposed on the upper surface of the base fabric (3), an adhesive layer (5) is provided between the polyurethane coating (2) and the base fabric (3), and the polyurethane coating (2) and the base fabric (3) are bonded together by the adhesive layer (5), the surface layer (1) is disposed on the side of the polyurethane coating (2) away from the base fabric (3), the side of the surface layer (1) away from the polyurethane coating (2) is coated with a hydrophobic coating (7), the polyurethane coating (2) has a microporous structure, and a plurality of hydrophilic fiber bundles (6) are embedded in the polyurethane coating (2).

2. The breathable and moisture-permeable PU synthetic leather according to claim 1, characterized in that, The base fabric (3) is a non-woven fabric material, and the base fabric (3) is filled with antistatic fibers (4) by weaving.

3. The breathable and moisture-permeable PU synthetic leather according to claim 1, characterized in that, The surface of the surface layer (1) away from the polyurethane coating (2) is provided with an imitation leather pattern.

4. The breathable and moisture-permeable PU synthetic leather according to claim 1, characterized in that, The microporous structure within the polyurethane coating (2) is formed by the precipitation of micropores through a wet process.

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