Titanium-containing leather

Abstract

The invention discloses titanium-containing leather, which is prepared from a solvent-free PU (polyurethane) mixture prepared by mixing a component A and a component B through blade coating, baking, base cloth attaching and separation processes, and the component A comprises the following components in percentage by mass: 80-85% of polyether polyol, 12-15% of polyester polyol, 2-8% of nano titanium powder, 0.2-0.6% of a zinc-bismuth compound and 0.1-0.4% of a platinum-carbon catalyst. By adding nano titanium powder into a solvent-free PU mixture and combining a specific component ratio and a preparation process, the product has good high temperature resistance, super-strong corrosion resistance and antibacterial property and is suitable for various application scenes such as outdoors, home furnishing, fitness equipment and the like, the leather is endowed with excellent mechanical properties due to the super strength of titanium, the leather is suitable for lightweight design, and the cost is reduced. The leather material has the advantages of high temperature resistance, corrosion resistance, biocompatibility and the like, can be widely applied to the fields of new energy automobiles and aerospace, has excellent biocompatibility, and meets the requirements of scenes such as medical and physical therapy equipment, children products, dining table mats and the like on material safety.

Description

Technical Field

[0001] This invention relates to the field of leather materials technology, specifically to a type of leather containing titanium. Background Technology

[0002] Leather, with its unique texture and properties, is widely used in furniture, automotive interiors, clothing, children's products, medical equipment, and many other fields. With socio-economic development and rising living standards, the performance requirements for leather materials are becoming increasingly stringent. Not only must they possess a good appearance and feel, but they also need to demonstrate excellent performance in areas such as high-temperature resistance, corrosion resistance, antibacterial properties, and environmental friendliness.

[0003] Traditional leather materials suffer from insufficient corrosion resistance and antibacterial properties to meet the demands of high-end applications. Furthermore, existing leather materials have significant shortcomings that limit their application in fields such as new energy vehicles and aerospace. Titanium, with its unique high strength, extreme corrosion resistance, excellent antibacterial properties, and biocompatibility, offers a promising solution to these challenges. Introducing titanium into leather materials is expected to improve the performance deficiencies of traditional leather. Simultaneously, optimizing the manufacturing process to ensure stable product performance and compliance with environmental requirements is a pressing technical issue in this field. Therefore, we propose a titanium-containing leather to address these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a titanium-containing leather to solve the problems currently found in the market as described in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a titanium-containing leather, which is obtained by coating, baking, bonding to a base fabric, and separating a solvent-free PU mixture made of component A and component B. Component A, by weight percentage, includes 80-85% polyether polyol, 12-15% polyester polyol, 2-8% nano titanium powder, 0.2-0.6% zinc bismuth compound, and 0.1-0.4% platinum carbon catalyst. Component B is MDI isocyanate, and the weight ratio of component A to component B is 2:1.

[0006] Preferably, the method for preparing the titanium-containing leather includes the following steps: (1) Preparation of solvent-free PU mixture: Add component A and component B to a high-speed mixer and stir for 1-2 minutes to obtain solvent-free PU mixture; component A, by mass percentage, includes 80-85% polyether polyol, 12-15% polyester polyol, 2-8% nano titanium powder, 0.2-0.6% zinc bismuth compound, and 0.1-0.4% platinum carbon catalyst; component B is MDI isocyanate, and the weight ratio of component A to component B is 2:1; (2) First coating and baking: The solvent-free PU mixture obtained in step (1) is uniformly coated onto the release paper by a coating process. The coating thickness is 0.15-0.18 mm. Then it is placed in an oven and baked at 140-150℃ for 4-5 minutes to obtain the film. (3) Second coating and baking: On the film obtained in step (2), a solvent-free PU mixture is coated again by a coating process. The coating thickness is 0.15-0.18 mm. The film is then baked in an oven at 140-150℃ for 4-5 minutes to thicken the film. (4) Third coating, bonding and baking: On the film thickened in step (3), a solvent-free PU mixture is coated by a coating process with a coating thickness of 0.2-0.3mm. It is then placed in an oven and pre-baked at 90-110℃ for 1.5-2 minutes. After that, the base fabric is attached and it is placed in the oven again for baking for 8-10 minutes. (5) Separation to obtain finished product: The material after step (4) is peeled off with release paper to obtain titanium-containing leather.

[0007] Preferably, the particle size of the nano-titanium powder is 50-200 nm.

[0008] Preferably, the molecular weight of the polyether polyol is 2000-4000.

[0009] Preferably, the molecular weight of the polyester polyol is 1500-3000.

[0010] Preferably, the stirring speed of the high-speed stirring equipment in step (1) is 800-1200 r / min.

[0011] Preferably, the release paper mentioned in steps (2)-(4) is a release paper with a pre-made texture, and the texture type of the release paper includes one of the following: lychee texture, plain texture, and frosted texture.

[0012] Preferably, the base fabric in step (4) is one of polyester fiber fabric, nylon fiber fabric or cotton fiber fabric.

[0013] Preferably, the titanium ion content in the titanium-containing leather is 300-1200 mg / kg.

[0014] Preferably, the baking atmosphere of the oven in steps (2)-(4) is an air atmosphere, and the wind speed inside the oven is 0.5-1.5m / s.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention, by adding nano-titanium powder to solvent-free PU mixtures, combined with specific component ratios and preparation processes, enables the product to possess excellent high-temperature resistance, superior corrosion resistance, and antibacterial properties, making it suitable for various application scenarios such as outdoor, home, and fitness equipment. The ultra-high strength of titanium gives leather excellent mechanical properties, making it suitable for lightweight design. Combined with its advantages of high-temperature resistance, corrosion resistance, and biocompatibility, it can be widely used in new energy vehicles and aerospace fields. At the same time, the leather material has excellent biocompatibility, meeting the material safety requirements of medical, physiotherapy equipment, children's products, placemats, and other scenarios. 2. By designing the titanium material itself, this invention achieves excellent recyclability without generating harmful substances during the recycling process. Furthermore, the invention uses solvent-free PU resin for preparation, making the production process more environmentally friendly and energy-efficient compared to traditional materials, thus meeting national carbon emission control targets. The preparation process is simple and controllable, and through three coating processes and segmented baking, it ensures uniform film thickness, strong bonding with the base fabric, and stable product performance, making it suitable for large-scale industrial production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the preparation process structure of the present invention; Figure 2 This is a schematic diagram of the titanium content detection report for the sample of this invention; Figure 3 This is a schematic diagram of the antibacterial test report for the sample of this invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0018] This invention provides a technical solution: a titanium-containing leather, wherein component A, by weight percentage, comprises: 80% polyether polyol (molecular weight 2000), 13% polyester polyol (molecular weight 1500), 6% nano-titanium powder (particle size 50nm), 0.6% zinc bismuth compound, and 0.4% platinum carbon catalyst; component B is MDI isocyanate, and the weight ratio of component A to component B is 2:1.

[0019] Its preparation method includes the following steps: (1) Preparation of solvent-free PU mixture: Add the above components A and B into a high-speed mixing device and stir for 2 minutes at a speed of 800 r / min to obtain a uniform solvent-free PU mixture; (2) First coating and baking: The solvent-free PU mixture is evenly coated onto the release paper with lychee texture by a coating process, with a coating thickness of 0.15mm. Then it is put into the oven and baked at 140℃ for 5 minutes to obtain the preliminary film. (3) Second coating and baking: Apply solvent-free PU mixture to the initial film again, with a coating thickness of 0.15 mm, and bake in an oven at 140°C for 5 minutes to thicken the film; (4) Third coating, bonding and baking: Coating the solvent-free PU mixture onto the thickened film with a coating thickness of 0.2 mm, pre-baking it in the oven at 90°C for 2 minutes, then attaching the polyester fiber cloth base fabric, and baking it again in the oven at an air atmosphere and wind speed of 0.5 m / s for 10 minutes. (5) Separation to obtain the finished product: Peel off the release paper to obtain titanium-containing leather. The test results showed that the titanium ion content in the leather was 615 mg / kg, and it had excellent corrosion resistance, antibacterial properties and mechanical properties. Example 2

[0020] A titanium-containing leather, wherein component A, by weight percentage, comprises: 81.5% polyether polyol (molecular weight 4000), 14% polyester polyol (molecular weight 3000), 4% nano-titanium powder (particle size 200nm), 0.3% zinc bismuth compound, and 0.2% platinum carbon catalyst; component B is MDI isocyanate, and the weight ratio of component A to component B is 2:1.

[0021] Its preparation method includes the following steps: (1) Preparation of solvent-free PU mixture: Add the above components A and B into a high-speed mixing device and stir for 1 minute at a speed of 1200 r / min to obtain a uniform solvent-free PU mixture; (2) First coating and baking: The solvent-free PU mixture is evenly coated onto the release paper with plain weave by a coating process. The coating thickness is 0.18 mm. Then it is put into the oven and baked at 150°C for 4 minutes to obtain the preliminary film. (3) Second coating and baking: Apply solvent-free PU mixture to the initial film again, with a coating thickness of 0.18 mm, and bake in an oven at 150°C for 4 minutes to thicken the film; (4) Third coating, bonding and baking: Coating the solvent-free PU mixture onto the thickened film with a coating thickness of 0.3 mm, pre-baking it in the oven at 110°C for 1.5 minutes, then attaching the nylon fiber cloth base fabric, and baking it again in the oven at an air atmosphere and wind speed of 1.5 m / s for 9 minutes. (5) Separation to obtain the finished product: Peel off the release paper to obtain titanium-containing leather. The test results showed that the titanium ion content in the leather was 420 mg / kg, and it had good biocompatibility, noise absorption capacity and environmental performance. Example 3

[0022] A titanium-containing leather, wherein component A, by weight percentage, comprises: 84% polyether polyol (molecular weight 3000), 13% polyester polyol (molecular weight 2000), 2% nano-titanium powder (particle size 100nm), 0.6% zinc bismuth compound, and 0.4% platinum carbon catalyst; component B is MDI isocyanate, and the weight ratio of component A to component B is 2:1.

[0023] Its preparation method includes the following steps: (1) Preparation of solvent-free PU mixture: Add the above components A and B into a high-speed mixing device and stir for 1.5 minutes at a speed of 1000 r / min to obtain a uniform solvent-free PU mixture; (2) First coating and baking: The solvent-free PU mixture is evenly coated onto the release paper with a frosted texture by a coating process. The coating thickness is 0.16 mm. Then it is put into the oven and baked at 145°C for 4.5 minutes to obtain the preliminary film. (3) Second coating and baking: Apply solvent-free PU mixture to the initial film again, with a coating thickness of 0.16 mm, and bake in an oven at 145°C for 4.5 minutes to thicken the film; (4) Third coating, bonding and baking: Coating the solvent-free PU mixture onto the thickened film with a coating thickness of 0.3 mm, pre-baking it in the oven at 100°C for 1.8 minutes, then attaching the cotton fiber cloth base fabric, and baking it again in the oven at an air atmosphere and wind speed of 1.0 m / s for 9 minutes. (5) Separation to obtain the finished product: Peel off the release paper to obtain titanium-containing leather. The test results showed that the titanium ion content in the leather was 355 mg / kg, and its comprehensive performance was excellent, which could meet the requirements for use in the interior of new energy vehicles.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A type of leather containing titanium, characterized in that: The solvent-free PU mixture, prepared by mixing component A and component B, is obtained through a process of coating, baking, bonding to a base fabric, and separation. Component A, by weight percentage, includes 80-85% polyether polyol, 12-15% polyester polyol, 2-8% nano titanium powder, 0.2-0.6% zinc bismuth compound, and 0.1-0.4% platinum carbon catalyst. Component B is MDI isocyanate, and the weight ratio of component A to component B is 2:

1.

2. The method for preparing titanium-containing leather according to claim 1, characterized in that, Includes the following steps: (1) Preparation of solvent-free PU mixture: Add component A and component B to a high-speed mixer and stir for 1-2 minutes to obtain solvent-free PU mixture; component A, by mass percentage, includes 80-85% polyether polyol, 12-15% polyester polyol, 2-8% nano titanium powder, 0.2-0.6% zinc bismuth compound, and 0.1-0.4% platinum carbon catalyst; component B is MDI isocyanate, and the weight ratio of component A to component B is 2:1; (2) First coating and baking: The solvent-free PU mixture obtained in step (1) is uniformly coated onto the release paper by a coating process. The coating thickness is 0.15-0.18 mm. Then it is placed in an oven and baked at 140-150℃ for 4-5 minutes to obtain the film. (3) Second coating and baking: On the film obtained in step (2), a solvent-free PU mixture is coated again by a coating process. The coating thickness is 0.15-0.18 mm. The film is then baked in an oven at 140-150℃ for 4-5 minutes to thicken the film. (4) Third coating, bonding and baking: On the film thickened in step (3), a solvent-free PU mixture is coated by a coating process with a coating thickness of 0.2-0.3mm. It is then placed in an oven and pre-baked at 90-110℃ for 1.5-2 minutes. After that, the base fabric is attached and it is placed in the oven again for baking for 8-10 minutes. (5) Separation to obtain finished product: The material after step (4) is peeled off with release paper to obtain titanium-containing leather.

3. The titanium-containing leather according to claim 1, characterized in that: The particle size of the nano-titanium powder is 50-200 nm.

4. The titanium-containing leather according to claim 1, characterized in that: The molecular weight of the polyether polyol is 2000-4000.

5. The titanium-containing leather according to claim 1, characterized in that: The molecular weight of the polyester polyol is 1500-3000.

6. The method for preparing titanium-containing leather according to claim 2, characterized in that: The stirring speed of the high-speed stirring equipment in step (1) is 800-1200 r / min.

7. The method for preparing titanium-containing leather according to claim 2, characterized in that: The release paper mentioned in steps (2)-(4) is a release paper with pre-made texture. The texture types of the release paper include one of the following: lychee texture, plain texture, and frosted texture.

8. The method for preparing titanium-containing leather according to claim 2, characterized in that: The base fabric mentioned in step (4) is one of polyester fiber fabric, nylon fiber fabric or cotton fiber fabric.

9. The method for preparing titanium-containing leather according to claim 2, characterized in that: The titanium ion content in the titanium-containing leather is 300-1200 mg / kg.

10. The method for preparing titanium-containing leather according to claim 2, characterized in that: In steps (2)-(4), the baking atmosphere of the oven is an air atmosphere, and the wind speed inside the oven is 0.5-1.5m / s.

Images