Negative ion polyurethane synthetic leather

Abstract

The utility model discloses negative ion polyurethane synthetic leather which comprises a base cloth modified layer, a bonding layer, a negative ion resin layer and a surface layer which are sequentially adhered from inside to outside, the base cloth modified layer comprises a base cloth body and negative ion polyurethane resin arranged on the base cloth body, and the negative ion polyurethane resin is at least partially impregnated in the base cloth body to form a negative ion film layer; the negative ion resin layer comprises a polyurethane resin body and negative ion powder dispersed in the polyurethane resin body, and the bonding layer adheres to the base cloth modified layer and the negative ion resin layer. According to the negative ion polyurethane synthetic leather provided by the utility model, negative ion materials are introduced into each layer, so that the stable release of negative ions is realized, and the physical property and durability of a product are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to synthetic leather technical field, concretely relates to a kind of anion polyurethane synthetic leather. BACKGROUND

[0002] As a kind of high-performance imitation leather material, polyurethane synthetic leather is widely used in footwear, clothing, furniture and other fields due to its high strength, wear resistance, cold resistance, air permeability, aging resistance, solvent resistance, and soft texture, elegant appearance and other characteristics. However, with the improvement of consumers' quality of life and the enhancement of health awareness, traditional polyurethane synthetic leather not only meets the basic physical properties, but also faces new challenges of functionalization and health. In nature, negative ions have attracted increasing attention due to their significant benefits to human health. Negative ions can improve heart and lung function, promote metabolism, enhance human resistance, optimize indoor air quality, and help relieve respiratory diseases. Therefore, incorporating negative ion function into polyurethane synthetic leather not only helps to improve product added value, but also meets the urgent needs of the market for healthy and environmentally friendly products. Currently, although some synthetic leather products with negative ion function have appeared on the market, these products mostly only have a simple coating of a negative ion-containing coating on the surface. This treatment not only results in limited negative ion release and insufficient durability, but also affects the overall quality and service life of the product. SUMMARY

[0003] The utility model aims to overcome the above-mentioned defects or problems in the background art, and provide an anion polyurethane synthetic leather, which realizes stable release of negative ions by introducing negative ion materials in each layer, and ensures the physical properties and durability of the product.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] The first technical solution relates to an anion polyurethane synthetic leather, which comprises a base cloth modification layer, an adhesive layer, a negative ion resin layer and a surface layer sequentially attached from inside to outside. The base cloth modification layer comprises a base cloth body and an anion polyurethane resin disposed on the base cloth body, and the anion polyurethane resin is at least partially impregnated in the base cloth body and forms an anion film layer. The negative ion resin layer comprises a polyurethane resin body and an anion powder dispersed in the polyurethane resin body, and the adhesive layer adheres the base cloth modification layer and the negative ion resin layer.

[0006] The second technical solution is based on the first technical solution, wherein the base cloth modification layer comprises a base cloth impregnation layer and a base cloth coating layer, the base cloth impregnation layer comprises the base cloth body and negative ion polyurethane resin dispersed in the base cloth body, the base cloth coating layer is negative ion polyurethane resin coated on the surface of the base cloth body, forming the negative ion film layer, and the adhesive layer connects the base cloth coating layer and the negative ion resin layer.

[0007] The third technical solution is based on the second technical solution, wherein the base cloth body is a needle-punched non-woven fabric.

[0008] The fourth technical solution is based on the third technical solution, wherein the adhesive layer is polyurethane resin.

[0009] The fifth technical solution is based on the fourth technical solution, wherein the thickness of the adhesive layer is 0.14mm to 0.16mm.

[0010] The sixth technical solution is based on the first technical solution, wherein the surface layer is a wear-resistant polyurethane resin layer.

[0011] The seventh technical solution is based on the sixth technical solution, wherein the thickness of the surface layer is 0.05mm to 0.07mm.

[0012] From the above description of the present application, the present application has the following beneficial effects compared with the prior art:

[0013] In the first technical solution and related embodiments, the negative ion polyurethane resin in the base cloth modification layer at least partially impregnates the base cloth body, forming a negative ion film layer, and combining with the negative ion powder dispersed in the negative ion resin layer, realizing efficient and continuous negative ion release, effectively improving indoor air quality and promoting human health. This embodiment can reduce the addition amount of negative ion powder while still achieving good negative ion release effect, reducing the adverse effects on the physical properties of polyurethane synthetic leather, while enhancing the durability and service life of the synthetic leather and improving its health performance.

[0014] In the second technical solution and related embodiments, the double-layer base cloth modification layer, i.e., the base cloth impregnation layer and the base cloth coating layer, realizes the dual improvement of negative ion release efficiency and synthetic leather physical properties. The negative ion polyurethane resin in the base cloth impregnation layer is dispersed inside the base cloth body, enhancing the negative ion release capacity of the material. The base cloth coating layer forms a negative ion polyurethane resin film layer on the surface of the base cloth body, further improving the release efficiency of negative ions and endowing the synthetic leather surface with good negative ion function. The adhesive layer connects the base cloth coating layer and the negative ion resin layer, ensuring the firmness and durability of the entire structure.

[0015] In the third technical solution and related embodiments, the needle-punched non-woven fabric provides a solid base for synthetic leather due to its good air permeability, flexibility and strength.

[0016] In the fourth technical solution and related embodiments, the use of polyurethane resin as the adhesive layer can improve the interlayer bonding force of the negative ion polyurethane synthetic leather. The polyurethane resin has good adhesion and elasticity, which can effectively combine the base fabric modification layer and the negative ion resin layer together to form a stable and durable structure.

[0017] In the fifth technical solution and related embodiments, controlling the thickness of the adhesive layer within the range of 0.14mm to 0.16mm can ensure that the adhesive layer has sufficient strength to connect the base fabric modification layer and the negative ion resin layer, and will not affect the air permeability and softness of the synthetic leather due to excessive thickness.

[0018] In the sixth technical solution and related embodiments, selecting wear-resistant polyurethane resin as the surface layer material can improve the wear resistance and scratch resistance of the negative ion polyurethane synthetic leather.

[0019] In the seventh technical solution and related embodiments, controlling the thickness of the surface layer within the range of 0.05mm to 0.07mm can ensure that the surface layer has sufficient wear resistance and scratch resistance, and will not affect the air permeability and lightweight of the synthetic leather due to excessive thickness. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The structure of the negative ion polyurethane synthetic leather is shown in the embodiment.

[0022] Explanation of main reference signs:

[0023] Surface layer 1, negative ion resin layer 2, adhesive layer 3, base fabric coating layer 4, base fabric impregnated layer 5. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are preferred embodiments of the present application, and should not be regarded as excluding other embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0026] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0027] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0028] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0029] See Figure 1 ,like Figure 1 As shown, a negative ion polyurethane synthetic leather includes a base fabric modification layer, an adhesive layer 3, a negative ion resin layer 2, and a surface layer 1, which are sequentially bonded from the inside out.

[0030] The base fabric modification layer includes a base fabric body and a negative ion polyurethane resin disposed on the base fabric body. The negative ion polyurethane resin is at least partially impregnated in the base fabric body to form a negative ion membrane layer. Specifically, the base fabric modification layer includes a base fabric impregnation layer 5 and a base fabric coating layer 4. The base fabric impregnation layer 5 includes a base fabric body and a negative ion polyurethane resin dispersed within the base fabric body. The base fabric coating layer 4 is a negative ion polyurethane resin coated on the surface of the base fabric body to form a negative ion membrane layer.

[0031] The base cloth modification layer is formed by the following process: first, the base cloth body is subjected to forced extrusion impregnation treatment, so that the negative ion polyurethane resin slurry fully penetrates and combines with the base cloth body, and is uniformly dispersed in the interior of the fibers. Subsequently, an impregnation layer 5 of the base cloth is formed through a drying step. Then, a layer containing negative oxygen ion polyurethane is coated on the basis of the impregnation layer 5 of the base cloth, so as to form a negative ion film on the surface of the base cloth body. Finally, the coating is solidified into a coating layer 4 of the base cloth through the processes of coagulation, water washing and re-drying.

[0032] In this embodiment, through the double-layer base cloth modification layer, i.e., the impregnation layer 5 of the base cloth and the coating layer 4 of the base cloth, the dual improvement of the negative ion release efficiency and the physical properties of the synthetic leather is realized. The negative ion polyurethane resin in the impregnation layer 5 of the base cloth is dispersed in the interior of the base cloth body, enhancing the negative ion release capacity of the material. The coating layer 4 of the base cloth forms a negative ion polyurethane resin film layer on the surface of the base cloth body, further improving the release efficiency of the negative ions and endowing the surface of the synthetic leather with good negative ion function.

[0033] In this embodiment, the base cloth body is a needle-punched non-woven fabric. The needle-punched non-woven fabric provides a solid base for the synthetic leather due to its good air permeability, flexibility and strength.

[0034] The adhesive layer 3 adopts polyurethane resin. The adhesive layer 3 adheres the base cloth modification layer and the negative ion resin layer 2. Specifically, the adhesive layer 3 adheres the coating layer 4 of the base cloth and the negative ion resin layer 2. The use of polyurethane resin as the adhesive layer 3 can improve the interlayer bonding force of the negative ion polyurethane synthetic leather. The polyurethane resin has good adhesion and elasticity, and can effectively tightly combine the base cloth modification layer and the negative ion resin layer 2 together, forming a stable and durable structure. In this embodiment, the solid content of the adhesive layer 3 is 18%-21%, and the drawdown thickness thereof is 0.14mm-0.16mm. Controlling the thickness of the adhesive layer 3 within the range of 0.14mm to 0.16mm can ensure that the adhesive layer 3 has sufficient strength to connect the base cloth modification layer and the negative ion resin layer 2, and will not affect the air permeability and softness of the synthetic leather due to excessive thickness.

[0035] The negative ion resin layer 2 includes a polyurethane resin body and negative ion powder dispersed in the polyurethane resin body. Specifically, the negative ion powder is uniformly stirred in the polyurethane resin slurry, and the stirring speed is 1500r / min-2000r / min, and the slurry viscosity is between 2500-3500.

[0036] The surface layer 1 is the outermost layer made of wear-resistant polyurethane resin, and is prepared as follows: uniformly coat a layer of polyurethane resin with wear-resistant properties on a release paper, and then send the coated release paper into an oven for drying treatment at a temperature of 110-130℃. After this step, the polyurethane resin is cured to form a wear-resistant surface layer 1 with a thickness of 0.05-0.07mm. The use of wear-resistant polyurethane resin as the material of the surface layer 1 can improve the wear resistance and scratch resistance of the negative ion polyurethane synthetic leather. Controlling the thickness of the surface layer 1 within the range of 0.05-0.07mm can ensure that the surface layer 1 has sufficient wear resistance and scratch resistance, and will not affect the air permeability and light weight of the synthetic leather due to excessive thickness.

[0037] In this embodiment, the negative ion polyurethane resin in the base cloth modification layer is at least partially impregnated into the base cloth body, forming a negative ion film layer, which, in combination with the dispersed negative ion powder in the negative ion resin layer 2, realizes efficient and continuous release of negative ions, effectively improves indoor air quality, and promotes human health. This embodiment can reduce the amount of negative ion powder added while still achieving good negative ion release effect, reducing the adverse effects on the physical properties of the polyurethane synthetic leather, while enhancing the durability and service life of the synthetic leather and improving its health performance.

[0038] The above description and embodiment are used to explain the scope of protection of the present application, but do not constitute a limitation on the scope of protection of the present application. Through the inspiration of the present application or the above embodiment, those skilled in the art can obtain modifications, equivalent replacements or other improvements of the embodiments of the present application or part of the technical features thereof by combining with common knowledge, ordinary technical knowledge in the art and / or existing technology through logical analysis, reasoning or limited experiments, which should be included in the scope of protection of the present application.

Claims

1. A negative ion polyurethane synthetic leather, characterized by, The base cloth modification layer, the adhesive layer (3), the negative ion resin layer (2) and the surface layer (1) are sequentially attached from inside to outside; the base cloth modification layer comprises a base cloth body and a negative ion polyurethane resin arranged on the base cloth body, the negative ion polyurethane resin is at least partially impregnated in the base cloth body and forms a negative ion film layer; the negative ion resin layer (2) comprises a polyurethane resin body and negative ion powder dispersed in the polyurethane resin body, and the adhesive layer (3) adheres the base cloth modification layer and the negative ion resin layer (2).

2. The anion polyurethane synthetic leather according to claim 1, wherein the anion polyurethane synthetic leather is characterized by, The base cloth modification layer comprises a base cloth impregnation layer (5) and a base cloth coating layer (4), the base cloth impregnation layer (5) comprises the base cloth body and the negative ion polyurethane resin dispersed in the base cloth body, and the base cloth coating layer (4) is the negative ion polyurethane resin coated on the surface of the base cloth body, forming the negative ion film layer, and the adhesive layer (3) adheres the base cloth coating layer (4) and the negative ion resin layer (2).

3. The anion polyurethane synthetic leather according to claim 2, characterized in that, The base cloth body is a needle-punched non-woven fabric.

4. The anion polyurethane synthetic leather according to claim 3, characterized in that, The adhesive layer (3) is a polyurethane resin.

5. The anion polyurethane synthetic leather according to claim 4, wherein the anion polyurethane synthetic leather is characterized by, The thickness of the adhesive layer (3) is 0.14mm to 0.16mm.

6. The anion polyurethane synthetic leather according to claim 1, wherein the anion polyurethane synthetic leather is characterized by, The surface layer (1) is a wear-resistant polyurethane resin layer.

7. The anion polyurethane synthetic leather according to claim 6, characterized in that, The thickness of the surface layer (1) is 0.05mm to 0.07mm.

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