Light-color anti-ammonia leather and preparation method thereof

Abstract

The invention relates to light-color anti-ammonia leather and a preparation method thereof. The light-color anti-ammonia leather comprises a light-color anti-ammonia leather surface layer, a middle reinforcing layer and a base cloth reinforcing layer, the light-color anti-ammonia leather surface layer, the middle reinforcing layer and the base cloth reinforcing layer are connected layer by layer from top to bottom; the preparation method comprises the following steps: selecting release paper, preparing light-color anti-ammonia leather surface layer slurry, coating the prepared light-color anti-ammonia leather surface layer slurry on the release paper in a gapless and scraping manner, coating the anti-ammonia leather surface layer slurry on the release paper in a gapless manner, and drying the anti-ammonia leather surface layer. And drying to form a light-color anti-ammonia leather surface layer, bonding the middle reinforcing layer and the base cloth reinforcing layer with the light-color anti-ammonia leather surface layer to obtain a semi-finished product, and drying the semi-finished product to obtain the artificial leather. The problem that white and light-color leather is prone to discoloration is solved.

Description

Technical Field

[0001] The invention relates to synthetic leather, in particular to light-colored ammonia-resistant leather and a preparation method thereof. Background Art

[0003] Light-colored products tend to change color over time, especially white, which will turn into creamy yellow. As the number of light-colored seat cushion leathers for car interiors increases, a light-colored interior material that will not change color for a long time is needed to meet customer needs. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a light-colored ammonia-resistant leather and a preparation method thereof that solves the problem of easy discoloration of white and light-colored leathers.

[0005] Technical solution: In order to solve the above technical problems, the light-colored ammonia-resistant leather described in the present invention includes a light-colored ammonia-resistant leather surface layer, an intermediate reinforcement layer and a base fabric reinforcement layer; the light-colored ammonia-resistant leather surface layer, the intermediate reinforcement layer and the base fabric reinforcement layer are connected layer by layer from top to bottom; the intermediate reinforcement layer includes an anti-ammonia additive and an anti-ultraviolet additive.

[0006] Furthermore, the light-colored ammonia-resistant leather surface layer comprises, by mass content, 92-95% of a non-yellowing polyurethane resin solution and 5-8% of a non-yellowing silicone paste composition; The non-yellowing polyurethane resin solution comprises, by mass content, 20-30% of high molecular weight diol, 1-5% of hydroxyalkyl-terminated polysiloxane, 1.5-2.2% of chain extender, 4.5-6% of diisocyanate, 65-75% of solvent, 0.01-0.02% of catalyst, 0.05-0.1% of antioxidant, 0.05-0.1% of chain terminator, 0.05-0.1% of slow-release tea aroma compound flavor, and the sum of all raw materials is 100%; The non-yellowing silicone paste composition comprises, by mass content, 35-55% of silicone gel, 20-40% of high-viscosity polydimethylsiloxane, 15-20% of non-ionic surfactant, and 5-10% of fumed silica.

[0007] A method for preparing light-colored ammonia-resistant leather comprises the following steps: (1) Select release paper and prepare light-colored ammonia-resistant leather surface layer slurry; (2) Scrape the prepared light-colored ammonia-resistant leather surface layer slurry onto the release paper without gaps, and dry it to form a light-colored ammonia-resistant leather surface layer; (3) bonding the intermediate reinforcement layer and the base fabric reinforcement layer to the light-colored ammonia-resistant leather surface layer to obtain a semi-finished product; (4) Drying the semi-finished product to obtain artificial leather.

[0008] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) The surface layer of the light-colored ammonia-resistant leather has anti-yellowing function, which can meet the needs of both dark-colored high-end polyurethane artificial leather and light-colored high-end polyurethane artificial leather; (2) The invention adds a slow-release tea aroma compound essence, which is environmentally friendly and non-toxic, can effectively improve the odor of leather, and the prepared product can slowly release the tea aroma. DETAILED DESCRIPTION

[0009] The present invention will be further described below in conjunction with the embodiments. Example 1

[0010] The light-colored ammonia-resistant leather described in the present invention comprises a light-colored ammonia-resistant leather surface layer, an intermediate reinforcement layer and a base fabric reinforcement layer; the light-colored ammonia-resistant leather surface layer, the intermediate reinforcement layer and the base fabric reinforcement layer are connected layer by layer from top to bottom; the intermediate reinforcement layer comprises an ammonia-resistant additive and an anti-ultraviolet additive.

[0011] Furthermore, the light-colored ammonia-resistant leather surface layer comprises, by mass content, 93% of a non-yellowing polyurethane resin solution and 7% of a non-yellowing silicone paste composition; The non-yellowing polyurethane resin solution includes, by mass content, 24% of high molecular weight diol, 3% of hydroxyalkyl-terminated polysiloxane, 2% of chain extender, 5% of diisocyanate, 65.8% of solvent, 0.01% of catalyst, 0.06% of antioxidant, 0.06% of chain terminator, and 0.07% of slow-release tea-flavored compound flavor, and the sum of all raw materials is 100%; The non-yellowing silicone paste composition includes, by mass content, 42% silicone gel, 30% high-viscosity polydimethylsiloxane, 18% non-ionic surfactant, and 10% fumed silica.

[0012] A method for preparing light-colored ammonia-resistant leather comprises the following steps: (1) Select release paper and prepare light-colored ammonia-resistant leather surface layer slurry; (2) Scrape the prepared light-colored ammonia-resistant leather surface layer slurry onto the release paper without gaps, and dry it to form a light-colored ammonia-resistant leather surface layer; (3) bonding the intermediate reinforcement layer and the base fabric reinforcement layer to the light-colored ammonia-resistant leather surface layer to obtain a semi-finished product; (4) Drying the semi-finished product to obtain artificial leather. Example 2

[0013] The light-colored ammonia-resistant leather described in the present invention comprises a light-colored ammonia-resistant leather surface layer, an intermediate reinforcement layer and a base fabric reinforcement layer; the light-colored ammonia-resistant leather surface layer, the intermediate reinforcement layer and the base fabric reinforcement layer are connected layer by layer from top to bottom; the intermediate reinforcement layer comprises an ammonia-resistant additive and an anti-ultraviolet additive.

[0014] Furthermore, the light-colored ammonia-resistant leather surface layer comprises, by mass content, 94% of a non-yellowing polyurethane resin solution and 6% of a non-yellowing silicone paste composition; The non-yellowing polyurethane resin solution includes, by mass content, 21% of high molecular weight diol, 4% of hydroxyalkyl-terminated polysiloxane, 1.9% of chain extender, 5.5% of diisocyanate, 67.37% of solvent, 0.02% of catalyst, 0.08% of antioxidant, 0.07% of chain terminator, and 0.06% of slow-release tea-flavored compound flavor, and the sum of all raw materials is 100%; The non-yellowing silicone paste composition includes, by mass content, 40% silicone gel, 32% high-viscosity polydimethylsiloxane, 19% non-ionic surfactant, and 9% fumed silica.

[0015] A method for preparing light-colored ammonia-resistant leather comprises the following steps: (1) Select release paper and prepare light-colored ammonia-resistant leather surface layer slurry; (2) Scrape the prepared light-colored ammonia-resistant leather surface layer slurry onto the release paper without gaps, and dry it to form a light-colored ammonia-resistant leather surface layer; (3) bonding the intermediate reinforcement layer and the base fabric reinforcement layer to the light-colored ammonia-resistant leather surface layer to obtain a semi-finished product; (4) Drying the semi-finished product to obtain artificial leather.

[0016] The surface layer of the light-colored ammonia-resistant leather in the present invention has an anti-yellowing function, and can meet the needs of both dark-colored high-end polyurethane artificial leather and light-colored high-end polyurethane artificial leather. The slow-release tea aroma composite flavor is added in the present invention, which is environmentally friendly and non-toxic, can effectively improve the odor of the leather, and the prepared product can slow-release the tea aroma.

[0017] The present invention provides a thought and method. There are many methods and ways to implement the technical solution. The above is only the preferred implementation mode of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A light-colored ammonia-resistant leather, characterized in that: It comprises a light-colored ammonia-resistant leather surface layer, an intermediate reinforcement layer and a base fabric reinforcement layer; the light-colored ammonia-resistant leather surface layer, the intermediate reinforcement layer and the base fabric reinforcement layer are connected layer by layer from top to bottom; the intermediate reinforcement layer comprises an ammonia-resistant additive and an ultraviolet-proof additive.

2. The light-colored ammonia-resistant leather according to claim 1, characterized in that: The light-colored ammonia-resistant leather surface layer comprises, by mass content, 92-95% of a non-yellowing polyurethane resin solution and 5-8% of a non-yellowing silicone paste composition; The non-yellowing polyurethane resin solution comprises, by mass content, 20-30% of high molecular weight diol, 1-5% of hydroxyalkyl-terminated polysiloxane, 1.5-2.2% of chain extender, 4.5-6% of diisocyanate, 65-75% of solvent, 0.01-0.02% of catalyst, 0.05-0.1% of antioxidant, 0.05-0.1% of chain terminator, 0.05-0.1% of slow-release tea aroma compound flavor, and the sum of all raw materials is 100%; The non-yellowing silicone paste composition comprises, by mass content, 35-55% of silicone gel, 20-40% of high-viscosity polydimethylsiloxane, 15-20% of non-ionic surfactant, and 5-10% of fumed silica.

3. A method for preparing the light-colored ammonia-resistant leather according to claim 1, characterized in that: It includes the following steps, (1) Select release paper and prepare light-colored ammonia-resistant leather surface layer slurry; (2) Scrape the prepared light-colored ammonia-resistant leather surface layer slurry onto the release paper without gaps, and dry it to form a light-colored ammonia-resistant leather surface layer; (3) bonding the intermediate reinforcement layer and the base fabric reinforcement layer to the light-colored ammonia-resistant leather surface layer to obtain a semi-finished product; (4) Drying the semi-finished product to obtain artificial leather.