Tea fragrance leather and preparation method thereof
By adding sustained-release tea aroma composite essence and specific crosslinking agent to the polyurethane synthetic leather, combined with the ultra-fiber non-woven base cloth, the problem of poor odor of polyurethane synthetic leather is solved, and a wear-resistant and environmentally friendly tea aroma leather is prepared. , meet diversified consumption needs.
Patent Information
- Application Number
- CN202411274382.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-01-07
AI Technical Summary
The existing polyurethane synthetic leather has the problem of not having the ideal smell during use and cannot meet the needs of diversified consumers.
Tea-flavored leather is prepared using water-based polyurethane, polyvinyl alcohol, aqueous leveling agent, nanographite powder and other materials. By adding sustained-release tea-flavored composite flavor to the surface treatment layer, aziridine crosslinking agent and isonitrile acid lipo Crosslinking agents are used to improve hydrolysis resistance and adhesion, and combine them with a microfiber non-woven fabric base fabric to prepare tea-flavored leather with a sustained release tea aroma.
It realizes environmentally friendly and non-toxic tea-flavored leather products, improves the odor problem of leather, improves the wear resistance and high-strength mechanical fatigue resistance of the product, and meets the use requirements of easily damaged leather goods.
Abstract
Description
Technical Field
[0001] The invention relates to synthetic leather, in particular to tea-scented leather. Background Art
[0002] China is currently the world's largest automobile consumer market. In 2017, the automobile production exceeded 29 million, of which 20% were equipped with leather seats. With the prosperity of the automobile market, the business opportunities of automobile leather making have attracted the attention of more and more leather companies. Statistics at the end of 2017 showed that in an environment where the profits of all products in the national leather industry generally declined, only the profits of automobile leather continued to grow.
[0003] Polyurethane synthetic leather has obvious advantages over other synthetic leathers in terms of wear resistance, softness, and leather feel. It is one of the most important synthetic leathers at present and has been widely used in many fields such as automotive interiors, sofas, clothing, luggage, etc.
[0004] However, the current polyurethane synthetic leather has the problem of unsatisfactory odor during its use, and cannot meet the diversified needs of consumers. Summary of the invention
[0005] Purpose of the invention: The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a tea scented leather having a sustained release of tea aroma and a preparation method thereof.
[0006] Technical solution: In order to solve the above technical problems, the tea-scented leather of the present invention comprises a base fabric, an adhesive layer, a surface layer and a surface treatment layer; The surface layer is prepared with water-based polyurethane, polyvinyl alcohol, water-based leveling agent, water-based defoaming agent, nano-graphite powder, water-based thickener, cross-linking agent and color paste as main raw materials; the main raw materials are calculated by weight as follows: 85-140 parts of water-based polyurethane, 25-30 parts of polyvinyl alcohol, 1-3 parts of water-based leveling agent, 1-3 parts of water-based defoaming agent, 25-30 parts of nano-graphite powder, 1-2 parts of water-based thickener, 1-2 parts of cross-linking agent and 1-2 parts of color paste; The cross-linking agent is epoxy resin; The surface treatment layer is made of the following raw materials in parts by weight: 50-90 parts of water-based polycarbonate PU resin, 30-40 parts of aliphatic polyurethane, 5-10 parts of aziridine crosslinking agent, 5-10 parts of isocyanate crosslinking agent, 5-10 parts of water-based silicone feel agent, 5-10 parts of acrylic thickener and 2-5 parts of slow-release tea aroma composite flavor; The slow-release tea aroma composite flavor is prepared from the following raw materials in parts by weight: 50-70 parts of polyurethane resin, 20-40 parts of tea aroma essence, 20-30 parts of nano calcium carbonate, 10-20 parts of multi-walled carbon nanotubes, 5-10 parts of foaming agent, and 2-5 parts of stabilizer.
[0007] Furthermore, the base fabric is made of microfiber non-woven fabric.
[0008] Furthermore, the foaming agent is azodicarbonamide.
[0009] Furthermore, the stabilizer is a calcium zinc stabilizer.
[0010] A method for preparing tea-scented leather comprises the following steps: 1. Preparation of slurry: 1.1. Preparation of surface slurry: Add an equal weight of water to polyvinyl alcohol and stir to dissolve, then add nano graphite powder and grind until uniformly dispersed to obtain a dispersion; mix water-based polyurethane, water-based leveling agent, water-based defoamer, water-based thickener, cross-linking agent, and color paste uniformly, and slowly add them to the obtained dispersion under stirring conditions; 1.2. Preparation of surface treatment layer slurry: evenly mix water-based polycarbonate PU resin, aliphatic polyurethane, aziridine crosslinking agent, isocyanate crosslinking agent, water-based silicone feel agent, acrylic thickener, and slow-release tea aroma compound flavor; 2. Slurry coating: 2.1. Apply the surface slurry on the release paper and dry it at 100-140℃ for 75-85s; 2.2. Apply the foaming layer slurry on the dried surface layer and dry it at 100-130℃ for 70-80s; 2.3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 80-120℃; 2.4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at a temperature of 90℃-140℃.
[0011] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) The present invention uses waterborne polyurethane to prepare artificial leather. Since it does not contain organic solvents, it will not cause harm to the human body and the environment. In addition, the addition of nano-graphite powder can enhance the wear resistance of the obtained artificial leather, so that the obtained artificial leather can still meet the use requirements of easily damaged leather products under the condition of thin thickness; (2) The surface treatment layer of the present invention is prepared by simultaneously adding an aziridine crosslinking agent and an isocyanate crosslinking agent to the water-based polycarbonate PU resin, and the two crosslinking agents react with the water-based polycarbonate PU resin at the same time; wherein the aziridine crosslinking agent is a trifunctional compound, which does not react with the substrate, but reacts with the carboxyl group of the water-based polycarbonate PU resin to crosslink the water-based polycarbonate PU resin, thereby improving its hydrolysis resistance; and the isocyanate crosslinking agent not only reacts with the substrate, but also reacts with the amino group and hydroxyl group of the water-based polycarbonate PU resin to crosslink the water-based polycarbonate PU resin, thereby increasing its adhesion to the substrate and further improving its wear resistance and high-strength mechanical fatigue resistance; (3) 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
[0012] The present invention will be further described below in conjunction with the embodiments. Example 1
[0013] The tea-scented leather of the present invention comprises a base fabric, an adhesive layer, a surface layer and a surface treatment layer; The surface layer is prepared with water-based polyurethane, polyvinyl alcohol, water-based leveling agent, water-based defoaming agent, nano-graphite powder, water-based thickener, cross-linking agent, and color paste as main raw materials; the main raw materials are calculated by weight as follows: 135 parts of water-based polyurethane, 26 parts of polyvinyl alcohol, 3 parts of water-based leveling agent, 2 parts of water-based defoaming agent, 28 parts of nano-graphite powder, 1.5 parts of water-based thickener, 1.4 parts of cross-linking agent, and 1.2 parts of color paste; The cross-linking agent is epoxy resin; The surface treatment layer is made of the following raw materials in parts by weight: 70 parts of water-based polycarbonate PU resin, 35 parts of aliphatic polyurethane, 8 parts of aziridine crosslinking agent, 7 parts of isocyanate crosslinking agent, 6 parts of water-based silicone feel agent, 5 parts of acrylic thickener and 4 parts of slow-release tea aroma composite flavor; The slow-release tea aroma composite flavor is made of the following raw materials in parts by weight: 65 parts of polyurethane resin, 35 parts of tea aroma flavor, 27 parts of nano calcium carbonate, 19 parts of multi-walled carbon nanotubes, 7 parts of foaming agent, and 3 parts of stabilizer.
[0014] The base fabric is made of microfiber non-woven fabric.
[0015] The foaming agent is azodicarbonamide.
[0016] The stabilizer is a calcium zinc stabilizer.
[0017] A method for preparing tea-scented leather comprises the following steps: 1. Preparation of slurry: 1.1. Preparation of surface slurry: Add an equal weight of water to polyvinyl alcohol and stir to dissolve, then add nano graphite powder and grind until uniformly dispersed to obtain a dispersion; mix water-based polyurethane, water-based leveling agent, water-based defoamer, water-based thickener, cross-linking agent, and color paste uniformly, and slowly add them to the obtained dispersion under stirring conditions; 1.2. Preparation of surface treatment layer slurry: evenly mix water-based polycarbonate PU resin, aliphatic polyurethane, aziridine crosslinking agent, isocyanate crosslinking agent, water-based silicone feel agent, acrylic thickener, and slow-release tea aroma compound flavor; 2. Slurry coating: 2.1. Apply the surface slurry on the release paper and dry it at 135℃ for 80s; 2.2. Apply the foaming layer slurry on the dried surface layer and dry it at 120℃ for 75s; 2.3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 110°C; 2.4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at 130°C. Example 2
[0018] The tea-scented leather of the present invention comprises a base fabric, an adhesive layer, a surface layer and a surface treatment layer; The surface layer is prepared with water-based polyurethane, polyvinyl alcohol, water-based leveling agent, water-based defoaming agent, nano-graphite powder, water-based thickener, cross-linking agent, and color paste as main raw materials; the main raw materials are calculated by weight as follows: 130 parts of water-based polyurethane, 27 parts of polyvinyl alcohol, 2 parts of water-based leveling agent, 1.5 parts of water-based defoaming agent, 27 parts of nano-graphite powder, 1.6 parts of water-based thickener, 1.5 parts of cross-linking agent, and 1.3 parts of color paste; The cross-linking agent is epoxy resin; The surface treatment layer is made of the following raw materials in parts by weight: 80 parts of water-based polycarbonate PU resin, 32 parts of aliphatic polyurethane, 7 parts of aziridine crosslinking agent, 6 parts of isocyanate crosslinking agent, 5.5 parts of water-based silicone feel agent, 5.2 parts of acrylic thickener and 3 parts of slow-release tea aroma composite flavor; The slow-release tea aroma composite flavor is made of the following raw materials in parts by weight: 60 parts of polyurethane resin, 32 parts of tea aroma flavor, 25 parts of nano calcium carbonate, 18 parts of multi-walled carbon nanotubes, 6 parts of foaming agent, and 4 parts of stabilizer.
[0019] The base fabric is made of microfiber non-woven fabric.
[0020] The foaming agent is azodicarbonamide.
[0021] The stabilizer is a calcium zinc stabilizer.
[0022] A method for preparing tea-scented leather comprises the following steps: 1. Preparation of slurry: 1.1. Preparation of surface slurry: Add an equal weight of water to polyvinyl alcohol and stir to dissolve, then add nano graphite powder and grind until uniformly dispersed to obtain a dispersion; mix water-based polyurethane, water-based leveling agent, water-based defoamer, water-based thickener, cross-linking agent, and color paste uniformly, and slowly add them to the obtained dispersion under stirring conditions; 1.2. Preparation of surface treatment layer slurry: evenly mix water-based polycarbonate PU resin, aliphatic polyurethane, aziridine crosslinking agent, isocyanate crosslinking agent, water-based silicone feel agent, acrylic thickener, and slow-release tea aroma compound flavor; 2. Slurry coating: 2.1. Apply the surface slurry on the release paper and dry it at 130℃ for 82s; 2.2. Apply the foaming layer slurry on the dried surface layer and dry it at 125℃ for 72s; 2.3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 115°C; 2.4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at 135°C. Example 3
[0023] The tea-scented leather of the present invention comprises a base fabric, an adhesive layer, a surface layer and a surface treatment layer; The surface layer is prepared with water-based polyurethane, polyvinyl alcohol, water-based leveling agent, water-based defoaming agent, nano-graphite powder, water-based thickener, cross-linking agent, and color paste as main raw materials; the main raw materials are calculated by weight as follows: 120 parts of water-based polyurethane, 28 parts of polyvinyl alcohol, 1.3 parts of water-based leveling agent, 1.2 parts of water-based defoaming agent, 26 parts of nano-graphite powder, 1.4 parts of water-based thickener, 1.1 parts of cross-linking agent, and 1 part of color paste; The cross-linking agent is epoxy resin; The surface treatment layer is made of the following raw materials in parts by weight: 75 parts of water-based polycarbonate PU resin, 36 parts of aliphatic polyurethane, 9 parts of aziridine crosslinking agent, 8 parts of isocyanate crosslinking agent, 7 parts of water-based silicone feel agent, 6 parts of acrylic thickener and 2.5 parts of slow-release tea aroma composite flavor; The slow-release tea aroma composite flavor is made of the following raw materials in parts by weight: 68 parts of polyurethane resin, 33 parts of tea aroma essence, 24 parts of nano calcium carbonate, 17 parts of multi-walled carbon nanotubes, 8 parts of foaming agent, and 2.5 parts of stabilizer.
[0024] The base fabric is made of microfiber non-woven fabric.
[0025] The foaming agent is azodicarbonamide.
[0026] The stabilizer is a calcium zinc stabilizer.
[0027] A method for preparing tea-scented leather comprises the following steps: 1. Preparation of slurry: 1.1. Preparation of surface slurry: Add an equal weight of water to polyvinyl alcohol and stir to dissolve, then add nano graphite powder and grind until uniformly dispersed to obtain a dispersion; mix water-based polyurethane, water-based leveling agent, water-based defoamer, water-based thickener, cross-linking agent, and color paste uniformly, and slowly add them to the obtained dispersion under stirring conditions; 1.2. Preparation of surface treatment layer slurry: evenly mix water-based polycarbonate PU resin, aliphatic polyurethane, aziridine crosslinking agent, isocyanate crosslinking agent, water-based silicone feel agent, acrylic thickener, and slow-release tea aroma compound flavor; 2. Slurry coating: 2.1. Apply the surface slurry on the release paper and dry it at 138℃ for 78s; 2.2. Apply the foaming layer slurry on the dried surface layer and dry it at 128℃ for 70s; 2.3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 112°C; 2.4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at 136°C.
[0028] The present invention adopts waterborne polyurethane to prepare artificial leather, which does not contain organic solvents and will not cause harm to human body and environment. The addition of nano graphite powder can enhance the wear resistance of the obtained artificial leather, so that the obtained artificial leather can still meet the use requirements of easily damaged leather products under the condition of thin thickness. The surface treatment layer of the present invention is prepared by adding aziridine crosslinking agent and isocyanate crosslinking agent to waterborne polycarbonate PU resin at the same time, and the two crosslinking agents react with the waterborne polycarbonate PU resin at the same time. The aziridine crosslinking agent is a trifunctional compound, which is not The isocyanate crosslinking agent not only reacts with the substrate, but also reacts with the carboxyl group of the water-based polycarbonate PU resin to crosslink the water-based polycarbonate PU resin, thereby improving its hydrolysis resistance; the isocyanate crosslinking agent not only reacts with the substrate, but also reacts with the amino and hydroxyl groups of the water-based polycarbonate PU resin to crosslink the water-based polycarbonate PU resin, thereby increasing its adhesion to the substrate and further improving its wear resistance and high-strength mechanical fatigue resistance; the invention adds a slow-release tea aroma composite flavor, which is environmentally friendly and non-toxic, can effectively improve the odor of leather, and the prepared product can slow-release tea aroma.
[0029] 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. Tea aroma leather, characterized in that: It includes a base fabric, an adhesive layer, a surface layer and a surface treatment layer; The surface layer is prepared with water-based polyurethane, polyvinyl alcohol, water-based leveling agent, water-based defoaming agent, nano-graphite powder, water-based thickener, cross-linking agent and color paste as main raw materials; the main raw materials are calculated by weight as follows: 85-140 parts of water-based polyurethane, 25-30 parts of polyvinyl alcohol, 1-3 parts of water-based leveling agent, 1-3 parts of water-based defoaming agent, 25-30 parts of nano-graphite powder, 1-2 parts of water-based thickener, 1-2 parts of cross-linking agent and 1-2 parts of color paste; The cross-linking agent is epoxy resin; The surface treatment layer is made of the following raw materials in parts by weight: 50-90 parts of water-based polycarbonate PU resin, 30-40 parts of aliphatic polyurethane, 5-10 parts of aziridine crosslinking agent, 5-10 parts of isocyanate crosslinking agent, 5-10 parts of water-based silicone feel agent, 5-10 parts of acrylic thickener and 2-5 parts of slow-release tea aroma composite flavor; The slow-release tea aroma composite flavor is prepared from the following raw materials in parts by weight: 50-70 parts of polyurethane resin, 20-40 parts of tea aroma essence, 20-30 parts of nano calcium carbonate, 10-20 parts of multi-walled carbon nanotubes, 5-10 parts of foaming agent, and 2-5 parts of stabilizer.
2. The tea-flavored leather according to claim 1, characterized in that: The base fabric is made of microfiber non-woven fabric.
3. The tea-scented leather according to claim 1, characterized in that: The foaming agent is azodicarbonamide.
4. The tea-scented leather according to claim 1, characterized in that: The stabilizer is a calcium zinc stabilizer.
5. A method for preparing the tea-scented leather according to claim 1, characterized in that: It includes the following steps, 1. Preparation of slurry: 1.
1. Preparation of surface slurry: Add an equal weight of water to polyvinyl alcohol and stir to dissolve, then add nano graphite powder and grind until uniformly dispersed to obtain a dispersion; mix water-based polyurethane, water-based leveling agent, water-based defoamer, water-based thickener, cross-linking agent, and color paste uniformly, and slowly add them to the obtained dispersion under stirring conditions; 1.
2. Preparation of surface treatment layer slurry: evenly mix water-based polycarbonate PU resin, aliphatic polyurethane, aziridine crosslinking agent, isocyanate crosslinking agent, water-based silicone feel agent, acrylic thickener, and slow-release tea aroma compound flavor; 2. Slurry coating: 2.
1. Apply the surface slurry on the release paper and dry it at 100-140℃ for 75-85s; 2.
2. Apply the foaming layer slurry on the dried surface layer and dry it at 100-130℃ for 70-80s; 2.
3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 80-120℃; 2.
4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at a temperature of 90℃-140℃.