Metal film synthetic leather and processing technology

Abstract

The invention discloses metal film synthetic leather which comprises a base material and a metal film, the metal film is located outside one side of the base material, the side, opposite to the base material, of the metal film is provided with a treatment layer made of a surface treating agent, and the surface treating agent comprises resin, fluff powder, a bridging agent, butanone, n-butyl acetate, a dispersing agent and an auxiliary; the processing technology of the metal film synthetic leather sequentially comprises the following steps of preparing a surface treating agent, treating the surface of a metal film, transferring the metal film, and forming the metal film synthetic leather sequentially provided with a base material, the metal film and a treatment layer. Compared with the prior art, the metal film synthetic leather has good wear resistance and scratch resistance, and the metal film layer is treated by the surface treating agent, so that the binding force of the metal film and the leather is enhanced, the metal film layer and the base material are not easy to peel off, and the binding is firmer.

Description

Technical Field

[0001] This invention relates to the field of synthetic leather preparation technology, and in particular to a metal film synthetic leather and its processing technology. Background Technology

[0002] Synthetic leather closely resembles real leather on both sides. It is primarily composed of polyurethane and possesses a degree of breathability, making it closer to natural leather than ordinary artificial leather. It is widely used in the footwear and bag manufacturing industries. Metallic films are also widely applied in these industries, giving synthetic leather vibrant colors and a strong metallic sheen. Existing metallic film synthetic leathers, such as the synthetic leather with a metallic film layer (application number 2009201795655), consist of a substrate, a PU foam layer, a PU pattern layer, and a metallic film layer. A wet foam layer is adhered to the substrate, and a polyurethane pattern layer is applied on top of the PU foam layer. A heat-sealing machine transfers the heat-adhesive metallic film to the top surface of the polyurethane pattern layer to form the metallic film layer, resulting in synthetic leather with a metallic luster.

[0003] However, the surface of the metal film on the synthetic leather with the aforementioned metal film layer is relatively smooth, which makes the surface of the metal film layer not wear-resistant or scratch-resistant. In addition, the contact area of ​​the metal film layer is insufficient and the bonding force is weak, which causes the metal film layer to easily peel off from other layers and the bonding is not firm.

[0004] In view of this, the inventors of this case conducted in-depth research on the problem, which led to the creation of this case. Summary of the Invention

[0005] The purpose of this invention is to provide a metal film synthetic leather to solve the problems of existing synthetic leathers being not wear-resistant, not scratch-resistant, and not firmly bonded.

[0006] To achieve its objective, the present invention employs the following technical solution:

[0007] A metal film synthetic leather includes a substrate and a metal film, the metal film being located on one side of the substrate, and the side of the metal film facing away from the substrate having a treatment layer made of a surface treatment agent, the surface treatment agent being composed of resin, fluff powder, crosslinking agent, methyl ethyl ketone, n-butyl acetate, dispersant and additives.

[0008] The surface of the processing layer is laminated with a surface bonding layer.

[0009] The surface bonding layer is an adhesive layer formed by an adhesive.

[0010] A processing technology for metallic film synthetic leather includes the following steps:

[0011] Step 1: Preparation of surface treatment agent. The resin, composite agent, methyl ethyl ketone (MEK), n-butyl acetate, dispersant, and additives are mixed to obtain the surface treatment agent. The resin accounts for 10%-20% of the total weight of the surface treatment agent. The flocking powder and crosslinking agent are mixed to obtain the composite agent, which accounts for 3%-13% of the total weight of the surface treatment agent. The flocking powder accounts for 92%-98% of the total weight of the composite agent, the crosslinking agent accounts for 2%-8% of the total weight of the composite agent, MEK and n-butyl acetate together account for 60%-70% of the total weight of the surface treatment agent, and the dispersant and additives together account for 5%-8% of the total weight of the surface treatment agent.

[0012] Step 2, surface treatment of the metal film: the surface treatment agent from Step 1 is applied to one side of the metal film and dried. The surface treatment agent is dried on the metal film to form the above-mentioned treatment layer.

[0013] Step 3, metal film transfer: Heat seal the working end of the hot heat sealing machine with the side of the treatment layer from Step 2 that is away from the metal film, and then transfer the metal film to the surface of the substrate to form a metal film synthetic leather having a substrate, a metal film, and a treatment layer in sequence.

[0014] The resin in step one is polyurethane resin, and polyurethane resin accounts for 20% of the total weight of the surface treatment agent.

[0015] The composite agent in step one accounts for 5% of the total weight of the surface treatment agent, and the fluff powder in step one is polyurethane elastomer fluff powder.

[0016] The butanone and n-butyl acetate mentioned in step one account for 70% of the total weight of the surface treatment agent.

[0017] The dispersant and additives mentioned in step one account for 5% of the total weight of the surface treatment agent.

[0018] In step three, before heat sealing the working end of the hot stamping machine with the side of the treatment layer from step two that faces away from the metal film, a small amount of adhesive is applied to the side of the treatment layer that faces away from the metal film. The adhesive forms the aforementioned surface bonding layer.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the metal film synthetic leather has good wear resistance and scratch resistance, and the metal film layer is treated with a surface treatment agent to enhance the bonding force between the metal film and the leather, making it difficult for the metal film layer to peel off from other layers, and the bonding is relatively firm, effectively improving the situation that the metal film surface is not wear-resistant, not scratch-resistant, and has poor surface adhesion.

[0020] Compared to traditional metallic film synthetic leather, which suffers from drawbacks such as poor abrasion and scratch resistance, and weak adhesion between the metallic film and the substrate, this invention achieves a key breakthrough by treating the surface of the metallic film with a surface treatment agent:

[0021] 1. The resin has excellent tensile strength, flexural strength and impact resistance, and good toughness. It can withstand large external forces without easily breaking, which greatly increases the wear resistance and scratch resistance of the surface of the metal film synthetic leather.

[0022] Second, the fleece powder itself has a certain degree of flexibility and elasticity, which can buffer external forces to a certain extent, further improving the wear resistance and scratch resistance of the metallic film synthetic leather. It also has good compatibility, which helps the fleece powder to be evenly dispersed at the interface of different materials, enhancing the bonding force between materials. When the surface treatment agent is coated on the metallic film, the crosslinking agent can form physical adsorption with the metallic film and crosslink with the fleece powder. This can promote the surface treatment agent to adhere to the surface of the metallic film or penetrate into the metallic film, making the bonding between the metallic film and the substrate stronger. In other words, both the fleece powder and the crosslinking agent can strengthen the bonding force between different substances. The surface treatment agent can penetrate into the metallic film and into the substrate, strengthening the bonding force between the substrate and the metallic film, resulting in better adhesion between the substrate and the metallic film.

[0023] Third, because the composite agent has high bonding strength, the viscosity of the composite agent can be reduced by using methyl ethyl ketone (MEK) and n-butyl acetate, which makes it easier for the surface treatment agent to be coated on the metal film.

[0024] Fourth, the dispersant has better tear strength, tensile strength, and abrasion resistance, which makes the metal film synthetic leather more durable.

[0025] Fifth, additives can improve the abrasion resistance and scratch resistance of metal-coated synthetic leather, extend its service life, and make the surface of metal-coated synthetic leather smooth to the touch. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0027] To further explain the technical solution of the present invention, a detailed description is provided below in conjunction with the accompanying drawings.

[0028] The present invention provides a metal film synthetic leather, such as... Figure 1 As shown, it includes a substrate 1 and a metal film 2. The metal film 2 is located on one side of the substrate 1. The side of the metal film 2 facing away from the substrate 1 has a treatment layer 3 made of a surface treatment agent. The surface treatment agent is composed of resin, fluff powder, crosslinking agent, methyl ethyl ketone, n-butyl acetate, dispersant and additives. That is, the metal film synthetic leather has a substrate 1, a metal film 2 and a treatment layer 3 in sequence.

[0029] Preferably, the surface of the treated layer is laminated with a surface bonding layer 4, which is an adhesive layer formed by an adhesive. In application, if the surface of the metal film synthetic leather is uneven, the surface bonding layer 4 facilitates the transfer of the metal film synthetic leather.

[0030] A processing technology for metallic film synthetic leather includes the following steps:

[0031] Step 1: Preparation of the surface treatment agent. The resin, composite agent, methyl ethyl ketone (MEK), n-butyl acetate, dispersant, and additives are mixed to obtain the surface treatment agent. The resin accounts for 10%-20% of the total weight of the surface treatment agent, preferably polyurethane resin, and the polyurethane resin accounts for 20% of the total weight of the surface treatment agent. The flocking powder and crosslinking agent are mixed to obtain the composite agent, wherein the composite agent accounts for 3%-13% of the total weight of the surface treatment agent, preferably 5% of the total weight of the surface treatment agent. The flocking powder accounts for 92%-98% of the total weight of the composite agent, preferably 9% of the total weight of the composite agent. 5%, wherein the fluff powder is polyurethane elastomer fluff powder, the crosslinking agent accounts for 2%-8% of the total weight of the composite agent, preferably, the crosslinking agent accounts for 5% of the total weight of the composite agent, the crosslinking agent is an isocyanate crosslinking agent, methyl ethyl ketone (MEK) and n-butyl acetate together account for 60%-70% of the total weight of the surface treatment agent, preferably, the MEK and n-butyl acetate together account for 70% of the total weight of the surface treatment agent, the dispersant and additives together account for 5%-8% of the total weight of the surface treatment agent, preferably, the dispersant and additives together account for 5% of the total weight of the surface treatment agent, preferably, the dispersant is a high molecular weight superdispersant, and the additives are anti-scratch and wear-resistant additives;

[0032] Step 2, surface treatment of the metal film: the surface treatment agent from Step 1 is applied to one side of the metal film and dried. The surface treatment agent is dried on the metal film to form the above-mentioned treatment layer. The method of applying the surface treatment agent to the metal film is a well-known technique to those skilled in the art and will not be described in detail here.

[0033] Step 3: Metal film transfer. A small amount of adhesive is applied to the side of the treated layer from Step 2 facing away from the metal film. The adhesive forms the aforementioned surface bonding layer. The working end of the heat press machine is heat-sealed to the side of the treated layer from Step 2 facing away from the metal film. Then, the metal film 2 and the treated layer 3 are transferred to the surface of the substrate 1, forming a metal film synthetic leather having the substrate 1, metal film 2, treated layer 3, and surface bonding layer in sequence. The operation of the heat press machine is well known to those skilled in the art and will not be described in detail here. When the substrate surface is extremely uneven and the required adhesion strength is extremely high, a small amount of adhesive can be used to facilitate the transfer.

[0034] Compared with the prior art, the beneficial effects of the present invention are: the metal film synthetic leather has good wear resistance and scratch resistance, and the metal film layer is treated with a surface treatment agent to enhance the bonding force between the metal film and the leather, making it difficult for the metal film layer to peel off from other layers, and the bonding is relatively firm, effectively improving the situation that the metal film surface is not wear-resistant, not scratch-resistant, and has poor surface adhesion.

[0035] Compared to traditional metallic film synthetic leather, which suffers from drawbacks such as poor abrasion and scratch resistance, and weak adhesion between the metallic film and the substrate, this invention achieves a key breakthrough by treating the surface of the metallic film with a surface treatment agent:

[0036] I. Polyurethane resin has excellent tensile strength, flexural strength and impact resistance, and good toughness. It can withstand large external forces without easily breaking, which greatly increases the wear resistance and scratch resistance of the surface of metal film synthetic leather.

[0037] Second, the fleece powder itself has a certain degree of flexibility and elasticity, which can buffer external forces to a certain extent, further improving the wear resistance and scratch resistance of the metallic film synthetic leather. It also has good compatibility, which helps the fleece powder to be evenly dispersed at the interface of different materials, enhancing the bonding force between materials. When the surface treatment agent is coated on the metallic film, the crosslinking agent can form physical adsorption with the metallic film and crosslink with the fleece powder. This can promote the surface treatment agent to adhere to the surface of the metallic film or penetrate into the metallic film, making the bonding between the metallic film and the substrate stronger. In other words, both the fleece powder and the crosslinking agent can strengthen the bonding force between different substances. The surface treatment agent can penetrate into the metallic film and into the substrate, strengthening the bonding force between the substrate and the metallic film, resulting in better adhesion between the substrate and the metallic film.

[0038] Third, because the composite agent has high bonding strength, the viscosity of the composite agent can be reduced by using methyl ethyl ketone (MEK) and n-butyl acetate, which makes it easier for the surface treatment agent to be coated on the metal film.

[0039] Fourth, high molecular weight superdispersants have better tear strength, tensile strength, and abrasion resistance, which makes metal film synthetic leather more durable.

[0040] 5. Anti-scratch and abrasion-resistant additives can improve the abrasion resistance and scratch resistance of metal-coated synthetic leather, extend its service life, and make the surface of metal-coated synthetic leather smooth to the touch.

[0041] The product form of the present invention is not limited to the illustrations and embodiments shown in this case. Any appropriate changes or modifications made to it based on similar ideas should be considered as not departing from the patent scope of the present invention.

Claims

1. A metal film synthetic leather comprising a substrate and a metal film, wherein the metal film is located on one side of the substrate, characterized in that: The metal film has a treatment layer made of a surface treatment agent on the side facing away from the substrate. The surface treatment agent is composed of resin, fluff powder, crosslinking agent, methyl ethyl ketone, n-butyl acetate, dispersant and additives.

2. The metal film synthetic leather according to claim 1, characterized in that: The surface of the processing layer is laminated with a surface bonding layer.

3. The metal film synthetic leather according to claim 2, characterized in that: The surface bonding layer is an adhesive layer formed by an adhesive.

4. The processing technology for a metal film synthetic leather according to claim 1, characterized in that: Includes the following steps: Step 1: Preparation of surface treatment agent. The resin, composite agent, methyl ethyl ketone (MEK), n-butyl acetate, dispersant, and additives are mixed to obtain the surface treatment agent. The resin accounts for 10%-20% of the total weight of the surface treatment agent. The flocking powder and crosslinking agent are mixed to obtain the composite agent, which accounts for 3%-13% of the total weight of the surface treatment agent. The flocking powder accounts for 92%-98% of the total weight of the composite agent, the crosslinking agent accounts for 2%-8% of the total weight of the composite agent, MEK and n-butyl acetate together account for 60%-70% of the total weight of the surface treatment agent, and the dispersant and additives together account for 5%-8% of the total weight of the surface treatment agent. Step 2, surface treatment of the metal film: the surface treatment agent from Step 1 is applied to one side of the metal film and dried. The surface treatment agent is dried on the metal film to form the above-mentioned treatment layer. Step 3, metal film transfer: Heat seal the working end of the hot heat sealing machine with the side of the treatment layer from Step 2 that is away from the metal film, and then transfer the metal film to the surface of the substrate to form a metal film synthetic leather having a substrate, a metal film, and a treatment layer in sequence.

5. The processing technology for a metal film synthetic leather according to claim 4, characterized in that: The resin in step one is polyurethane resin, and polyurethane resin accounts for 20% of the total weight of the surface treatment agent.

6. The processing technology for a metal film synthetic leather according to claim 4, characterized in that: The composite agent in step one accounts for 5% of the total weight of the surface treatment agent, and the fluff powder in step one is polyurethane elastomer fluff powder.

7. The processing technology for a metal film synthetic leather according to claim 4, characterized in that: The butanone and n-butyl acetate mentioned in step one account for 70% of the total weight of the surface treatment agent.

8. The processing technology for a metal film synthetic leather according to claim 4, characterized in that: The dispersant and additives mentioned in step one account for 5% of the total weight of the surface treatment agent.

9. The processing technology for a metal film synthetic leather according to claim 4, characterized in that: In step three, before heat sealing the working end of the hot stamping machine with the side of the treatment layer from step two that faces away from the metal film, a small amount of adhesive is applied to the side of the treatment layer that faces away from the metal film. The adhesive forms the aforementioned surface bonding layer.

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