Solvent-free resin microfiber synthetic leather

Abstract

The utility model discloses solvent-free resin microfiber synthetic leather which comprises a synthetic leather body, and the synthetic leather body comprises a first fitting body and a second fitting body; the first laminating body comprises a microfiber Bass layer, a first waterborne polyurethane slurry layer and an auxiliary agent layer; the first waterborne polyurethane slurry layer is coated on the microfiber Bass layer and is used as a dry method layer, and the auxiliary agent layer is arranged on the upper surface of the dry method layer; the second laminating body comprises a second waterborne polyurethane slurry layer and a solvent-free resin layer which are arranged from bottom to top; the solvent-free resin layer is arranged on the release paper, and the surface, away from the release paper, of the solvent-free resin layer is coated with the second waterborne polyurethane slurry layer and is dried to be half-dry to serve as an adhesion layer; the first attaching body is attached to the second attaching body, and the dry method layer and the adhesion layer are attached to each other; therefore, parallel production and manufacturing are facilitated, the production efficiency and the yield are improved, and the solvent-free resin layer serving as the upper layer is soft in hand feeling, faster in rebound performance recovery, resistant to abrasion, resistant to scratching, resistant to aging and easy to clean.

Description

Technical Field

[0001] The utility model relates to the field of synthetic leather technology, in particular to a solvent-free resin ultra-fiber synthetic leather. Background Art

[0002] Existing synthetic leather technology generally uses solvent-based polyurethane resins and water-based resins as the main carriers. With the country's requirements for the environment, solvent-based polyurethane resins have odor and need to be diluted with dimethylformamide and ethyl acetate, which are harmful to workers and exhaust gases. Water-based resins have great limitations on product style changes and have a single product style.

[0003] Based on this, the industry began to study solvent-free leather materials; for example, CN 206070215U discloses a new water-based solvent-free leather material, which has a microfiber bass layer, on which a base material layer, an intermediate foaming layer and a surface layer are stacked in sequence; the base material layer is a water-based anionic-aliphatic polyether polyurethane resin layer, the intermediate foaming layer is a solvent-free reactive polyurethane resin layer, and the surface layer includes a first surface layer and a second surface layer stacked in sequence on the intermediate foaming layer, the first surface layer is a water-based aliphatic polycarbonate-polyether polyurethane resin layer, and the second surface layer is a water-based ionic polycarbonate polyurethane resin layer. It utilizes the advantages and disadvantages of water-based resins and solvent-free resins, takes their strengths and makes up for their weaknesses, and combines the design to obtain a leather product with the advantages of being green, environmentally friendly and pollution-free.

[0004] However, the production of this new type of water-based solvent-free leather material has many steps and requires coating layer by layer. Therefore, "coating-drying-coating-drying..." needs to be repeated many times. In this way, the entire production cycle is long, which makes it inconvenient to carry out parallel production and is not conducive to the control of production efficiency. Moreover, layer-by-layer stacking is not conducive to the control of defective products in different links of the process, resulting in limited yield rate.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0006] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a solvent-free resin microfiber synthetic leather, which facilitates parallel production by dividing the synthetic leather body into two semi-finished products, namely a first bonding body and a second bonding body, thereby shortening the entire production cycle and improving production efficiency and yield rate. Moreover, the solvent-free resin layer serves as the upper layer, which is an elastomer layer exposed on the outer surface, has a soft hand feel, faster recovery and rebound performance, is wear-resistant, flex-resistant, and anti-aging, and is easy to clean.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A solvent-free resin microfiber synthetic leather comprises a synthetic leather body, wherein the synthetic leather body comprises a first laminating body and a second laminating body;

[0009] The first bonding body comprises a microfiber bass layer, a first water-based polyurethane slurry layer and an auxiliary agent layer; the first water-based polyurethane slurry layer is coated on the microfiber bass layer and dried semi-dry as a dry layer, and the auxiliary agent layer is arranged on the upper surface of the dry layer;

[0010] The second bonding body comprises a second aqueous polyurethane slurry layer and a solvent-free resin layer arranged from bottom to top; the solvent-free resin layer is disposed on a release paper, and the second aqueous polyurethane slurry layer is coated on a surface of the solvent-free resin layer away from the release paper and is semi-dried to form an adhesive layer;

[0011] The first laminating body is laminated on the second laminating body, the dry layer and the adhesive layer are laminated to each other, and are dried so that the solvent-free resin layer is foamed and thickened.

[0012] As a preferred embodiment, a first bamboo charcoal fiber layer is disposed on the upper surface of the microfiber bass layer, and the first aqueous polyurethane slurry layer is coated on the upper surface of the first bamboo charcoal fiber layer and covers the first bamboo charcoal fiber layer.

[0013] As a preferred solution, a second bamboo charcoal fiber layer is provided on the lower surface of the microfiber bass layer.

[0014] As a preferred solution, the second bamboo charcoal fiber layer is bonded to the lower surface of the microfiber bass layer through a nano silver adhesive layer.

[0015] As a preferred solution, the thickness of the synthetic leather body is 1.20 mm±0.05 mm, and the thickness of the solvent-free resin layer is 0.70 mm±0.15 mm.

[0016] As a preferred solution, the solvent-free resin layer is a solvent-free high-solid resin layer.

[0017] As a preferred solution, an embossed layer is provided on the surface of the solvent-free resin layer away from the second aqueous polyurethane slurry layer.

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it is mainly achieved by dividing the synthetic leather body into two semi-finished products, namely a first laminating body and a second laminating body, wherein the first laminating body includes a microfiber bass layer, a first water-based polyurethane slurry layer and an auxiliary agent layer, and the second laminating body includes a second water-based polyurethane slurry layer and a solvent-free resin layer arranged from bottom to top. During production, the first laminating body and the second laminating body are produced separately to facilitate parallel production, and then the two semi-finished products are laminated, which is beneficial to shortening the entire production cycle and improving production efficiency and yield rate. Moreover, the solvent-free resin layer is used as the upper layer, which is an elastomer layer exposed on the outer surface, has a soft hand feel, faster recovery and rebound performance, is wear-resistant, flex-resistant, and anti-aging, and is easy to clean.

[0019] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of the solvent-free resin microfiber synthetic leather of the first embodiment of the utility model;

[0021] Figure 2 This is a diagram showing the manufacturing process of the solvent-free resin microfiber synthetic leather according to the first embodiment of the utility model;

[0022] Figure 3 It is a surface embossed line diagram of the solvent-free resin microfiber synthetic leather of the first embodiment of the utility model;

[0023] Figure 4 This is a test report of the solvent-free resin microfiber synthetic leather of the first embodiment of the present utility model;

[0024] Figure 5 This is a cross-sectional view of the solvent-free resin microfiber synthetic leather of the second embodiment of the present utility model;

[0025] Figure 6 It is a cross-sectional view of the solvent-free resin microfiber synthetic leather of the second embodiment of the present utility model.

[0026] Description of the symbols in the accompanying drawings: microfiber bass layer 11, first water-based polyurethane slurry layer 12, auxiliary agent layer 13, first bamboo charcoal fiber layer 14, second bamboo charcoal fiber layer 15, nano silver glue layer 16, second water-based polyurethane slurry layer 21, solvent-free resin layer 22, embossed layer 23, release paper 24. DETAILED DESCRIPTION

[0027] Please refer to Figures 1 to 6 As shown, it shows the specific structure of various embodiments of the present utility model.

[0028] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] like Figure 1 As shown, a solvent-free resin microfiber synthetic leather includes a synthetic leather body, wherein the synthetic leather body includes a first bonding body and a second bonding body. The first bonding body and the second bonding body are produced in parallel.

[0030] The first bonding body includes a microfiber bass layer 11, a first water-based polyurethane slurry layer 12 and an auxiliary agent layer 13; the first water-based polyurethane slurry layer 12 is coated on the microfiber bass layer 11 and dried half-dried as a dry layer, and the auxiliary agent layer 13 is arranged on the upper surface of the dry layer;

[0031] The second bonding body includes a second aqueous polyurethane slurry layer 21 and a solvent-free resin layer 22 arranged from bottom to top; the solvent-free resin layer 22 is arranged on a release paper 24, and the second aqueous polyurethane slurry layer 21 is coated on the surface of the solvent-free resin layer 22 away from the release paper 24 and is dried half-dried as an adhesive layer. The subdivided materials of the second aqueous polyurethane slurry layer 21 and the first aqueous polyurethane slurry layer 12 can be the same or different, and both belong to aqueous polyurethane slurry. Moreover, in actual production, the second aqueous polyurethane slurry layer 21 and the first aqueous polyurethane slurry layer 12 are coated as thinly as possible to increase the proportion of the solvent-free resin layer 22 in the total thickness of the synthetic leather body.

[0032] The first bonding body is bonded to the second bonding body, the dry layer and the adhesive layer are bonded to each other, and are dried so that the solvent-free resin layer 22 is foamed and thickened; and an embossed layer 23 is provided on the surface of the solvent-free resin layer 22 away from the second water-based polyurethane slurry layer 21, and the embossed layer 23 can be directly embossed on the surface of the solvent-free resin layer 22 away from the second water-based polyurethane slurry layer 21.

[0033] like Figure 2 As shown, during production, the first fitting body and the second fitting body are produced in parallel:

[0034] A microfiber bass layer 11 is prepared, a first aqueous polyurethane slurry is coated on the microfiber bass layer 11, and the first aqueous polyurethane slurry layer 12 is dried semi-dried, and the semi-dried first aqueous polyurethane slurry layer 12 is used as a dry layer, and the semi-finished product at this time can be understood as a first-stage semi-finished product; at the same time, a release paper 24 is prepared, and a solvent-free resin is coated on the release paper 24 to form a solvent-free resin layer 22, wherein the solvent-free resin here is an existing material, and the solvent-free resin layer 22 is preferably a solvent-free high-solid resin layer, for example, 85% solid content is a carrier, and the solvent-free resin generally includes There are solvent-free high-solid resin, color powder (such as organic color powder), softener, wetting dispersant, etc., which are fully mixed and dissolved; then the first aqueous polyurethane slurry is coated on the solvent-free resin layer 22 and dried half-dried. The second aqueous polyurethane slurry layer 21 is used as an adhesive layer. The semi-finished product at this time can be understood as another first-stage semi-finished product; before laminating, the first-stage semi-finished product is injected with an additive on the surface of the dry layer and then laminated to the adhesive layer, and then laminated-dried-cooled. The drying temperature is above 140°C for high-solid foaming, that is, the solvent-free resin layer 22 is foamed and thickened during drying. Subsequently, after being placed in an insulation room for 48 hours, the release paper 24 is separated. The thickness of the obtained synthetic leather body is 1.2mm±0.05mm, and the thickness of the solvent-free resin layer after foaming is 0.70mm±0.15mm. The layer structure of this kind of solvent-free resin ultra-fiber synthetic leather effectively improves the working environment and reduces the generation of volatile organic compounds during production.

[0035] like Figure 3 As shown, since the solvent-free resin layer is used as the upper layer, which is the elastomer layer exposed on the outer surface, it is easy to form textures and facilitate the formation of a deeper embossed layer. The embossed textures are clear and obvious, and the simulated leather effect is more ideal.

[0036] like Figure 4 As shown, it shows the test report of the solvent-free resin microfiber synthetic leather of Example 1, which has good performance in terms of leather thickness, room temperature bending resistance, low temperature bending resistance, tear force, peeling force, wear resistance, color fastness, high temperature resistance, hydrolysis resistance, environmental protection standards and other items.

[0037] like Figure 5As shown, it shows the layer structure of the solvent-free resin microfiber synthetic leather of Example 2, which is basically the same as the structure of Example 1, and the main difference is that the solvent-free resin microfiber synthetic leather of Example 2 is further provided with a first bamboo charcoal fiber layer 14. Specifically, the upper surface of the microfiber bass layer 11 is provided with a first bamboo charcoal fiber layer 14, and the first bamboo charcoal fiber layer 14 can be bonded to the upper surface of the microfiber bass layer 11 by gluing, and the first aqueous polyurethane slurry layer 12 is coated on the upper surface of the first bamboo charcoal fiber layer 14 on the microfiber bass layer 11 and covers the first bamboo charcoal fiber layer 14. The provision of the first bamboo charcoal fiber layer 14 can play a certain role in sweat absorption and deodorization.

[0038] like Figure 6 As shown, it shows the layer structure of the solvent-free resin microfiber synthetic leather of Example 3, which is basically the same as the structure of Example 1, and the main difference is that the solvent-free resin microfiber synthetic leather of Example 3 is further provided with a second bamboo charcoal fiber layer 15. Specifically, the lower surface of the microfiber bass layer 11 is provided with a second bamboo charcoal fiber layer 15, and similarly, the second bamboo charcoal fiber layer 15 can be bonded to the lower surface of the microfiber bass layer 11 by gluing. The provision of the second bamboo charcoal fiber layer 15 can play a certain role in sweat absorption and deodorization. Preferably, the second bamboo charcoal fiber layer 15 is bonded to the lower surface of the microfiber bass layer 11 through a nano silver glue layer 16. Compared with other conventional glues, the nano silver glue layer 16 can not only play an adhesive role, but also play auxiliary roles such as antibacterial and antistatic.

[0039] In addition, it should be noted that this type of solvent-free resin microfiber synthetic leather is usually used for men's shoes, packaging, casual shoes, sports shoes, luggage, furniture products, automotive interior accessories, etc. In actual application, the inner side of the solvent-free resin microfiber synthetic leather is usually also provided with an inner lining.

[0040] The design focus of the utility model is that it mainly divides the synthetic leather body into two semi-finished products, a first laminating body and a second laminating body, wherein the first laminating body includes a microfiber bass layer 11, a first water-based polyurethane slurry layer 12 and an auxiliary agent layer 13, and the second laminating body includes a second water-based polyurethane slurry layer 21 and a solvent-free resin layer 22 arranged from bottom to top. During production, the first laminating body and the second laminating body are produced separately, which is convenient for parallel production, and then the two semi-finished products are laminated, which is beneficial to shorten the entire production cycle and to improve production efficiency and yield rate. Moreover, the solvent-free resin layer 22 is used as the upper layer, which is an elastomer layer exposed on the outer surface, has a soft hand feel, faster recovery and rebound performance, is wear-resistant, flex-resistant, and anti-aging, and has a soft, natural luster and is easy to clean.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A solvent-free resin microfiber synthetic leather, comprising a synthetic leather body, characterized in that: The synthetic leather body includes a first fitting body and a second fitting body; The first bonding body comprises a microfiber bass layer (11), a first water-based polyurethane slurry layer (12) and an auxiliary agent layer (13); the first water-based polyurethane slurry layer (12) is coated on the microfiber bass layer (11) and dried semi-dry to form a dry layer, and the auxiliary agent layer (13) is arranged on the upper surface of the dry layer; The second bonding body comprises a second aqueous polyurethane slurry layer (21) and a solvent-free resin layer (22) arranged from bottom to top; the solvent-free resin layer (22) is arranged on a release paper (24), and the second aqueous polyurethane slurry layer (21) is coated on a surface of the solvent-free resin layer (22) away from the release paper (24) and is semi-dried to form an adhesive layer; The first laminating body is laminated onto the second laminating body, the dry layer and the adhesive layer are laminated to each other, and are dried so that the solvent-free resin layer (22) is foamed and thickened.

2. The solvent-free resin microfiber synthetic leather according to claim 1, characterized in that: A first bamboo charcoal fiber layer (14) is disposed on the upper surface of the microfiber bass layer (11), and the first aqueous polyurethane slurry layer (12) is coated on the upper surface of the first bamboo charcoal fiber layer (14) and on the microfiber bass layer (11) and covers the first bamboo charcoal fiber layer (14).

3. The solvent-free resin microfiber synthetic leather according to claim 1, characterized in that: A second bamboo charcoal fiber layer (15) is provided on the lower surface of the microfiber bass layer (11).

4. The solvent-free resin microfiber synthetic leather according to claim 3, characterized in that: The second bamboo charcoal fiber layer (15) is bonded to the lower surface of the microfiber bass layer (11) via a nano silver adhesive layer (16).

5. The solvent-free resin microfiber synthetic leather according to claim 1, characterized in that: The thickness of the synthetic leather body is 1.20 mm±0.05 mm, and the thickness of the solvent-free resin layer (22) is 0.70 mm±0.15 mm.

6. The solvent-free resin microfiber synthetic leather according to claim 1, characterized in that: The solvent-free resin layer (22) is a solvent-free high-solid resin layer.

7. The solvent-free resin microfiber synthetic leather according to claim 1, characterized in that: An embossed layer (23) is provided on the surface of the solvent-free resin layer (22) away from the second aqueous polyurethane slurry layer (21).

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