High-strength waterproof PU synthetic leather

Abstract

The utility model discloses high-strength waterproof PU (polyurethane) synthetic leather, which belongs to the technical field of synthetic leather and is characterized in that a synthetic leather body is provided with a PU surface layer, a reinforcing layer and an inner layer, the PU surface layer, the reinforcing layer and the inner layer are mutually connected and fixed, the PU surface layer comprises a PU layer, an adhesion-assisting layer and a surface coating, the adhesion-assisting layer is fixedly adhered to the surface of the PU layer, the surface coating is coated on the surface of the adhesion-assisting layer, and the surface coating is coated on the surface of the PU layer. The reinforcing layer comprises a waterproof layer, a first tensile layer, a second tensile layer and a connecting rib, and the first tensile layer and the second tensile layer are connected into a whole through the connecting rib. According to the high-strength waterproof PU synthetic leather, through the arrangement of the reinforcing layer, the tensile strength of the PU surface layer and the inner layer can be improved, meanwhile, separation among the PU surface layer, the reinforcing layer and the inner layer can be avoided, and the service life of the PU surface layer and the inner layer is prolonged; according to the synthetic leather, the tensile strength and the tearing strength of the synthetic leather are greatly improved, the synthetic leather has a dual-waterproof function through the surface coating and the waterproof layer, and meanwhile, the wear resistance and the flame retardance of the surface of the PU surface layer can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of synthetic leather, and more specifically to a high-strength waterproof PU synthetic leather. Background Art

[0002] PU synthetic leather is polyurethane synthetic leather. The surface is polyurethane and the back is cloth. It has the advantages of good cold resistance, breathability, washability, easy processing and favorable price. It is now widely used in the decoration of bags, clothing, shoes, vehicles and furniture. It has many advantages that PVC synthetic leather cannot match. It is an ideal material to replace natural leather. However, with the development of society, the performance of PU synthetic leather may not meet people's needs.

[0003] For example, announcement No. CN217047833U discloses a kind of PU synthetic leather that is not easy to deform and is resistant to bending, comprising a first stretch-resistant fabric strip, a PU synthetic leather base layer, a first reinforced plug-in fabric strip, a second reinforced plug-in fabric strip and a second PU surface layer, the top of the PU synthetic leather base layer is provided with a second reinforced connecting fabric layer, and the bottom of the PU synthetic leather base layer is provided with a first reinforced connecting fabric layer, both ends of the PU synthetic leather base layer are provided with a first stretch-resistant fabric strip, and the inside of the first stretch-resistant fabric strip is evenly installed with a third stretch-resistant elastic cotton strip, the top of the second reinforced connecting fabric layer is provided with a first PU surface layer, and the top of the first PU surface layer is provided with a first moisture-absorbing and breathable layer, the bottom of the first PU surface layer is evenly provided with a first reinforced plug-in fabric strip, the top of the second reinforced connecting fabric layer is evenly provided with a first connecting groove, the bottom of the first reinforced connecting fabric layer is provided with a second PU surface layer, and the top of the second PU surface layer is evenly provided with a second reinforced plug-in fabric strip, and the bottom of the first reinforced connecting fabric layer is evenly provided with a second connecting groove.

[0004] It can be seen from the above-mentioned public scheme that although PU synthetic leather has increased bending resistance, it may cause the synthetic leather to tear and delaminate when pulled and torn by external force, and its insufficient waterproof performance shortens the service life of the synthetic leather and cannot meet people's usage needs. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a high-strength waterproof PU synthetic leather. The high-strength waterproof PU synthetic leather can not only increase the tensile strength of the PU surface layer and the inner layer by setting a reinforcement layer, but also avoid separation between the PU surface layer, the reinforcement layer and the inner layer, thereby greatly improving the tensile and tearing strength of the synthetic leather. Moreover, by setting a surface coating and a waterproof layer, the synthetic leather has a dual waterproof function, and can increase the wear resistance and flame retardancy of the surface of the PU surface layer.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A high-strength waterproof PU synthetic leather comprises a synthetic leather body, wherein the synthetic leather body is provided with a PU surface layer, a reinforcement layer and an inner layer, wherein the PU surface layer, the reinforcement layer and the inner layer are mutually connected and fixed, wherein the PU surface layer comprises a PU layer, an adhesion-promoting layer and a surface coating, wherein the adhesion-promoting layer is fixedly bonded to the surface of the PU layer, and the surface coating is coated on the surface of the adhesion-promoting layer, wherein the reinforcement layer comprises a waterproof layer, a first tensile layer, a second tensile layer and connecting ribs, wherein the first tensile layer and the second tensile layer are integrally connected by connecting ribs, and the connecting ribs are fixedly compounded in the waterproof layer, wherein the inner layer comprises a moisture absorption layer, a guide layer and a fireproof layer, wherein the moisture absorption layer, the guide layer and the fireproof layer are mutually fixed and connected, wherein the high-strength waterproof PU synthetic leather can increase the tensile strength of the PU surface layer and the inner layer by means of the reinforcement layer, and can also avoid separation between the PU surface layer, the reinforcement layer and the inner layer, thereby greatly improving the tensile and tearing strength of the synthetic leather, and can increase the wear resistance and flame retardancy of the surface of the PU surface layer by means of the surface coating and the waterproof layer, wherein the surface coating and the waterproof layer are provided.

[0008] Furthermore, the first tensile layer and the second tensile layer have the same shape and size, the first tensile layer and the second tensile layer are both woven with nylon fibers, and the connecting ribs are formed by twisting multiple strands of nylon fibers. The first tensile layer, the second tensile layer and the connecting ribs can increase the mechanical strength of the PU synthetic leather and improve the tensile, compressive and anti-delamination properties of the PU synthetic leather.

[0009] Furthermore, the waterproof layer is made of polyurethane waterproof adhesive, and the two surfaces of the waterproof layer are fixedly bonded to the surfaces of the PU layer and the moisture absorption layer respectively, which can improve the waterproof performance of the PU synthetic leather.

[0010] Furthermore, the moisture absorption layer is made of a high molecular moisture absorption material, the guide layer is made of a long fiber material, and the thickness of the moisture absorption layer is greater than that of the guide layer, so that the inside of the PU synthetic leather clothing has the function of absorbing moisture and removing sweat.

[0011] Furthermore, the surface of the fireproof layer is provided with equally distributed air holes, and the fireproof layer is made of wear-resistant and flame-retardant fabric, which can increase the fireproof performance of the inner surface of the PU synthetic leather fabric.

[0012] Furthermore, the surface coating is formed by coating with a wear-resistant, waterproof and flame-retardant coating, which can increase the wear-resistant, waterproof and flame-retardant properties of the surface of the PU layer.

[0013] Furthermore, the adhesion-promoting layer is formed by coating a PU adhesion-promoting agent, which can increase the adhesion of the surface coating on the surface of the PU layer.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The reinforcement layer provided in this solution can not only increase the tensile strength of the PU surface layer and the inner layer, but also avoid separation between the PU surface layer, the reinforcement layer and the inner layer, thereby greatly improving the tensile and tearing strength of the synthetic leather.

[0016] This solution provides a surface coating and a waterproof layer, so that the synthetic leather has a dual waterproof function, and at the same time can increase the wear resistance and flame retardancy of the PU surface layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 It is a side view of the overall structure of the utility model;

[0019] Figure 3 for Figure 2 A magnified view of part A;

[0020] Figure 4 for Figure 2 Bottom view of the fire protection layer structure.

[0021] Description of the numbers in the figure:

[0022] 1 PU surface layer, 11 PU layer, 12 adhesion-promoting layer, 13 surface coating, 2 reinforcement layer, 21 waterproof layer, 22 first tensile layer, 23 second tensile layer, 24 connecting ribs, 3 inner layer, 31 moisture absorption layer, 32 diversion layer, 33 fireproof layer, 34 air permeability hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0024] See also Figure 1-4A high-strength waterproof PU synthetic leather comprises a synthetic leather body, wherein the synthetic leather body is provided with a PU surface layer 1, a reinforcement layer 2 and an inner layer 3, wherein the PU surface layer 1, the reinforcement layer 2 and the inner layer 3 are connected and fixed to each other, the PU surface layer 1 comprises a PU layer 11, an adhesion-promoting layer 12 and a surface coating 13, the adhesion-promoting layer 12 is fixedly bonded to the surface of the PU layer 11, the surface coating 13 is coated on the surface of the adhesion-promoting layer 12, and the other surface of the PU surface layer 1 is also provided with an adhesion-promoting coating, which can increase the bonding strength between the PU surface layer 1 and the waterproof layer 21, the reinforcement layer 2 comprises a waterproof layer 21, a first tensile layer 22, a second tensile layer 23 and a connection layer 14, wherein the adhesion-promoting layer 12 is fixedly bonded to the surface of the PU layer 11, the surface coating 13 is coated on the surface of the adhesion-promoting layer 12, and the adhesion-promoting coating is also provided on the other surface of the PU surface layer 1 The ribs 24, the first tensile layer 22 and the second tensile layer 23 are connected as a whole through the connecting ribs 24, which can increase the tensile and tearing strength of the PU synthetic leather in the length direction, width direction and thickness direction. The connecting ribs 24 are fixedly compounded in the waterproof layer 21. The inner layer 3 includes a moisture absorption layer 31, a guide layer 32 and a fireproof layer 33. The moisture absorption layer 31, the guide layer 32 and the fireproof layer 33 are fixedly connected to each other. The moisture absorption layer 31 is made of a high molecular moisture absorption material, and the guide layer 32 is made of a long fiber material. The thickness of the moisture absorption layer 31 is greater than the thickness of the guide layer 32, so that the inside of the PU synthetic leather clothing has the function of moisture absorption and sweat removal.

[0025] The first tensile layer 22 and the second tensile layer 23 have the same shape and size. The first tensile layer 22 and the second tensile layer 23 are both woven from nylon fibers. The connecting ribs 24 are twisted from multiple strands of nylon fibers. The first tensile layer 22, the second tensile layer 23 and the connecting ribs 24 can increase the mechanical strength of the PU synthetic leather, and improve the tensile, compressive and delamination properties of the PU synthetic leather. The surface of the fireproof layer 33 is provided with equidistantly distributed air holes 34. The fireproof layer 33 is made of wear-resistant and flame-retardant fabric, which can increase the fireproof performance of the inner surface of the PU synthetic leather fabric.

[0026] The waterproof layer 21 is made of polyurethane waterproof adhesive. The two surfaces of the waterproof layer 21 are fixedly bonded to the surfaces of the PU layer 11 and the moisture absorption layer 31 respectively, which can improve the waterproof performance of the PU synthetic leather. The surface coating 13 is coated with wear-resistant, waterproof and flame-retardant coating, which can increase the wear resistance, waterproof and flame retardancy of the surface of the PU layer 11. The adhesion-promoting layer 12 is coated with a PU adhesion promoter, which can increase the adhesion of the surface coating 13 on the surface of the PU layer 11.

[0027] When the high-strength waterproof PU synthetic leather is pulled and torn by external forces in the length and width directions, the first tensile layer 22 and the second tensile layer 23 will increase the tensile strength of the PU synthetic leather in the length and width directions. When the PU synthetic leather is pulled and torn by external forces in the thickness direction, the connecting ribs 24 will increase the tensile strength of the PU synthetic leather in the thickness direction, so that the PU surface layer 1, the reinforcement layer 2 and the inner layer 3 will not be delaminated. The reinforcement layer 2 is set, not only the tensile strength of the PU surface layer 1 and the inner layer 3 can be increased, but also the separation between the PU surface layer 1, the reinforcement layer 2 and the inner layer 3 can be avoided, which greatly improves the tensile and tearing strength of the synthetic leather. In addition, the surface coating 13 and the waterproof layer 21 are set, so that the synthetic leather has a dual waterproof function, and the wear resistance and flame retardant properties of the surface of the PU surface layer 1 can be increased.

[0028] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A high-strength waterproof PU synthetic leather, comprising a synthetic leather body, wherein the synthetic leather body is provided with a PU surface layer (1), a reinforcement layer (2) and an inner layer (3), characterized in that: The PU surface layer (1), the reinforcement layer (2) and the inner layer (3) are connected and fixed to each other. The PU surface layer (1) comprises a PU layer (11), an adhesion-promoting layer (12) and a surface coating (13). The adhesion-promoting layer (12) is fixedly bonded to the surface of the PU layer (11). The surface coating (13) is coated on the surface of the adhesion-promoting layer (12). The reinforcement layer (2) comprises a waterproof layer (21), a first tensile layer (22), a second tensile layer (23) and a connecting rib (24). The first tensile layer (22) and the second tensile layer (23) are connected as a whole via the connecting rib (24). The connecting rib (24) is fixedly compounded in the waterproof layer (21). The inner layer (3) comprises a moisture absorption layer (31), a fluid guide layer (32) and a fireproof layer (33). The moisture absorption layer (31), the fluid guide layer (32) and the fireproof layer (33) are fixedly connected to each other.

2. The high-strength waterproof PU synthetic leather according to claim 1, characterized in that: The first tensile layer (22) and the second tensile layer (23) have the same shape and size; the first tensile layer (22) and the second tensile layer (23) are both woven from nylon fibers; and the connecting ribs (24) are formed by twisting a plurality of nylon fibers.

3. The high-strength waterproof PU synthetic leather according to claim 1, characterized in that: The waterproof layer (21) is made of polyurethane waterproof adhesive, and two surfaces of the waterproof layer (21) are fixedly bonded to the surfaces of the PU layer (11) and the moisture absorption layer (31), respectively.

4. The high-strength waterproof PU synthetic leather according to claim 1, characterized in that: The moisture absorption layer (31) is made of a macromolecular moisture absorption material, the flow guiding layer (32) is made of a long fiber material, and the thickness of the moisture absorption layer (31) is greater than the thickness of the flow guiding layer (32).

5. The high-strength waterproof PU synthetic leather according to claim 1, characterized in that: The surface of the fireproof layer (33) is provided with equidistantly distributed air holes (34), and the fireproof layer (33) is made of wear-resistant flame-retardant fabric.

6. The high-strength waterproof PU synthetic leather according to claim 1, characterized in that: The surface coating (13) is formed by coating with a wear-resistant, waterproof and flame-retardant coating.

7. The high-strength waterproof PU synthetic leather according to claim 1, characterized in that: The adhesion-promoting layer (12) is formed by coating with a PU adhesion-promoting agent.

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