Composite high-temperature-resistant leather material and preparation method thereof

Abstract

The invention discloses a preparation method of a composite high-temperature-resistant leather material. 35-40 parts of PVC resin, 4-7 parts of a plasticizer, 2-5 parts of a heat stabilizer, 2-5 parts of a silane coupling agent and 5-8 parts of an antibacterial agent are stirred and mixed uniformly to obtain a first material body; according to the composite high-temperature-resistant leather material, the PVC resin is matched with the plasticizer, the heat stabilizer, the antibacterial agent and other raw materials, then the silane coupling agent serves as an interface auxiliary, the leather fibers serve as a reinforcing agent, and the added modified filler and modified strontium oxide are mutually blended, coordinated and jointly synergized, so that the product is excellent in antibacterial and self-cleaning performance, and the service life of the product is prolonged. Meanwhile, the stability of the product is remarkable under the scrubbing and high-temperature conditions.

Description

Technical Field

[0001] The invention relates to the technical field of leather materials, and in particular to a composite high-temperature resistant leather material and a preparation method thereof. Background Art

[0002] Leather is a denatured and non-perishable animal skin obtained through physical and chemical processing such as depilation and tanning. Existing leather materials have poor antibacterial and self-cleaning properties, and the stability of the product is significantly reduced under scrubbing and high temperature conditions, which limits the use efficiency of the product. Based on this, the present invention further improves and processes it. Summary of the invention

[0003] In view of the defects of the prior art, the purpose of the present invention is to provide a composite high temperature resistant leather material and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0004] The present invention solves the technical problem by adopting the following technical solution: The present invention provides a method for preparing a composite high temperature resistant leather material, comprising the following steps: Step 1: Stir and mix 35-40 parts of PVC resin, 4-7 parts of plasticizer, 2-5 parts of heat stabilizer, 2-5 parts of silane coupling agent and 5-8 parts of antibacterial agent to obtain a first material body; Step 2: crush the cowhide through 100 meshes, and then soak it in a sufficient amount of 5% by mass sodium hydroxide solution for 2 hours at a soaking temperature of 70°C. After the soaking is completed, continue to crush, grind, filter, and dry to obtain leather fibers; Step 3: Blend 4-7 parts of modified filler, 2-5 parts of leather fiber, and 2-5 parts of silicone oil to obtain a second material; Step 4: 40-50 parts of the first material, 6-10 parts of the second material and 2-5 parts of the modified strontium oxide agent are fully mixed, extruded at 200°C, calendered at 180°C, and finally cooled to room temperature to obtain a composite high temperature resistant leather material.

[0005] Preferably, the antibacterial agent is nano silver powder; The plasticizer is octyl phthalate; the silane coupling agent is silane coupling agent KH560; and the heat stabilizer is zinc stearate.

[0006] Preferably, the preparation method of the modified filler is: S11: irradiating the calcined talc in a proton irradiation box until the irradiation is completed, thereby obtaining irradiated calcined talc; S12: 5-8 parts of irradiated calcined talc, 1-3 parts of nano-silica sol, 2-5 parts of carboxymethyl cellulose, and 5-8 parts of sodium alginate solution are mixed and ball-milled for 1 hour at a ball-milling speed of 750 r / min. After the ball-milling is completed, a calcined talc liquid is obtained; S13: The modifier and calcined talc solution are mixed in a weight ratio of 2:5 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a modified filler.

[0007] Preferably, the mass fraction of the sodium alginate solution is 2-5%.

[0008] Preferably, the irradiation time in the proton irradiation box is 20-30 minutes, and the irradiation power is 350-400W.

[0009] Preferably, the modifier is yttrium oxide.

[0010] Preferably, the preparation method of the modified strontium oxide agent is: S101: Stirring strontium oxide and lanthanum nitrate solution in a weight ratio of 5:2 to obtain strontium oxide solution; S102: 2-5 parts of strontium oxide solution are added to 2-6 parts of sodium citrate aqueous solution, followed by adding 2-3 parts of silane coupling agent KH550 and 1-3 parts of carboxymethyl cellulose, and the mixture is ball-milled. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified strontium oxide agent.

[0011] Preferably, the mass fraction of the lanthanum nitrate solution is 2-5%; the mass fraction of the sodium citrate aqueous solution is 4-6%.

[0012] Preferably, the ball milling speed of the blended ball milling treatment is 450-550 r / min, and the ball milling is performed for 2 hours.

[0013] The invention also provides a composite high temperature resistant leather material prepared by a method for preparing the composite high temperature resistant leather material.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The composite high-temperature resistant leather material of the invention adopts PVC resin, plasticizer, heat stabilizer, antibacterial agent and other raw materials, and then uses silane coupling agent as interface auxiliary agent, uses leather fiber as reinforcing agent, and adds modified filler and modified strontium oxide agent, which are blended and matched with each other to enhance the effect together, so that the product has excellent antibacterial and self-cleaning properties, and the product has remarkable stability under scrubbing and high temperature conditions. The modified filler adopts calcined talc for irradiation treatment, and then is blended and ball-milled by nano silica sol, carboxymethyl cellulose and sodium alginate solution, and the raw materials are blended and matched, and then yttrium oxide is used as a modifier for improvement treatment, so that the modified filler obtained in the system enhances the antibacterial and self-cleaning properties of the product, and the modified strontium oxide agent added at the same time adopts strontium oxide to match lanthanum nitrate solution, and the sodium citrate aqueous solution, silane coupling agent KH550 and carboxymethyl cellulose added at the same time are blended and blended, so that the modified strontium oxide agent and the modified filler agent have better coordination effect, and the performance of the product is further improved. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] A method for preparing a composite high temperature resistant leather material according to the present embodiment comprises the following steps: Step 1: Stir and mix 35-40 parts of PVC resin, 4-7 parts of plasticizer, 2-5 parts of heat stabilizer, 2-5 parts of silane coupling agent and 5-8 parts of antibacterial agent to obtain a first material body; Step 2: crush the cowhide through 100 meshes, and then soak it in a sufficient amount of 5% by mass sodium hydroxide solution for 2 hours at a soaking temperature of 70°C. After the soaking is completed, continue to crush, grind, filter, and dry to obtain leather fibers; Step 3: Blend 4-7 parts of modified filler, 2-5 parts of leather fiber, and 2-5 parts of silicone oil to obtain a second material; Step 4: 40-50 parts of the first material, 6-10 parts of the second material and 2-5 parts of the modified strontium oxide agent are fully mixed, extruded at 200°C, calendered at 180°C, and finally cooled to room temperature to obtain a composite high temperature resistant leather material.

[0017] The antibacterial agent in this embodiment is nano silver powder; The plasticizer is octyl phthalate; the silane coupling agent is silane coupling agent KH560; and the heat stabilizer is zinc stearate.

[0018] The preparation method of the modified filler of this embodiment is: S11: irradiating the calcined talc in a proton irradiation box until the irradiation is completed, thereby obtaining irradiated calcined talc; S12: 5-8 parts of irradiated calcined talc, 1-3 parts of nano-silica sol, 2-5 parts of carboxymethyl cellulose, and 5-8 parts of sodium alginate solution are mixed and ball-milled for 1 hour at a ball-milling speed of 750 r / min. After the ball-milling is completed, a calcined talc liquid is obtained; S13: The modifier and calcined talc solution are mixed in a weight ratio of 2:5 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a modified filler.

[0019] The mass fraction of the sodium alginate solution in this embodiment is 2-5%.

[0020] The irradiation time in the proton irradiation box of this embodiment is 20-30 minutes, and the irradiation power is 350-400W.

[0021] The modifier in this embodiment is yttrium oxide.

[0022] The preparation method of the modified strontium oxide agent of this embodiment is: S101: Stirring strontium oxide and lanthanum nitrate solution in a weight ratio of 5:2 to obtain strontium oxide solution; S102: 2-5 parts of strontium oxide solution are added to 2-6 parts of sodium citrate aqueous solution, followed by adding 2-3 parts of silane coupling agent KH550 and 1-3 parts of carboxymethyl cellulose, and the mixture is ball-milled. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified strontium oxide agent.

[0023] The mass fraction of the lanthanum nitrate solution in this embodiment is 2-5%; the mass fraction of the sodium citrate aqueous solution is 4-6%.

[0024] The ball milling speed of the blended ball milling treatment in this embodiment is 450-550 r / min, and the ball milling is 2 h.

[0025] The composite high temperature resistant leather material is prepared by a preparation method of a composite high temperature resistant leather material in this embodiment.

[0026] Example 1. A method for preparing a composite high temperature resistant leather material according to the present embodiment comprises the following steps: Step 1: 35 parts of PVC resin, 4 parts of plasticizer, 2 parts of heat stabilizer, 2 parts of silane coupling agent and 5 parts of antibacterial agent are stirred and mixed to obtain a first material body; Step 2: crush the cowhide through 100 meshes, and then soak it in a sufficient amount of 5% by mass sodium hydroxide solution for 2 hours at a soaking temperature of 70°C. After the soaking is completed, continue to crush, grind, filter, and dry to obtain leather fibers; Step 3: Blend 4 parts of modified filler, 2 parts of leather fiber and 2 parts of silicone oil to obtain a second material; Step 4: 40 parts of the first material, 6 parts of the second material and 2 parts of the modified strontium oxide agent are fully mixed, extruded at 200°C, calendered at 180°C, and finally cooled to room temperature to obtain a composite high-temperature resistant leather material.

[0027] The antibacterial agent in this embodiment is nano silver powder; The plasticizer is octyl phthalate; the silane coupling agent is silane coupling agent KH560; and the heat stabilizer is zinc stearate.

[0028] The preparation method of the modified filler of this embodiment is: S11: irradiating the calcined talc in a proton irradiation box until the irradiation is completed, thereby obtaining irradiated calcined talc; S12: 5 parts of irradiated calcined talc, 1 part of nano-silica sol, 2 parts of carboxymethyl cellulose and 5 parts of sodium alginate solution were mixed and ball-milled for 1 hour at a ball-milling speed of 750 r / min. After the ball-milling was completed, a calcined talc liquid was obtained; S13: The modifier and calcined talc solution are mixed in a weight ratio of 2:5 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a modified filler.

[0029] The mass fraction of the sodium alginate solution in this embodiment is 2%.

[0030] The irradiation time in the proton irradiation box of this embodiment is 20 minutes, and the irradiation power is 35W.

[0031] The modifier in this embodiment is yttrium oxide.

[0032] The preparation method of the modified strontium oxide agent of this embodiment is: S101: Stirring strontium oxide and lanthanum nitrate solution in a weight ratio of 5:2 to obtain strontium oxide solution; S102: 2 parts of strontium oxide solution are added to 2 parts of sodium citrate aqueous solution, and then 2 parts of silane coupling agent KH550 and 1 part of carboxymethyl cellulose are added, and the mixture is ball-milled. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified strontium oxide agent.

[0033] The mass fraction of the lanthanum nitrate solution in this embodiment is 2%; the mass fraction of the sodium citrate aqueous solution is 4%.

[0034] The ball milling speed of the blended ball milling treatment in this embodiment is 450 r / min, and the ball milling is performed for 2 h.

[0035] The composite high temperature resistant leather material is prepared by a preparation method of a composite high temperature resistant leather material in this embodiment.

[0036] Example 2. A method for preparing a composite high temperature resistant leather material according to the present embodiment comprises the following steps: Step 1: 40 parts of PVC resin, 7 parts of plasticizer, 5 parts of heat stabilizer, 5 parts of silane coupling agent and 8 parts of antibacterial agent are stirred and mixed to obtain a first material body; Step 2: crush the cowhide through 100 meshes, and then soak it in a sufficient amount of 5% by mass sodium hydroxide solution for 2 hours at a soaking temperature of 70°C. After the soaking is completed, continue to crush, grind, filter, and dry to obtain leather fibers; Step 3: 7 parts of modified filler, 5 parts of leather fiber and 5 parts of silicone oil are fully blended to obtain a second material body; Step 4: 50 parts of the first material, 10 parts of the second material and 5 parts of the modified strontium oxide agent are fully mixed, extruded at 200° C., calendered at 180° C., and finally cooled to room temperature to obtain a composite high-temperature resistant leather material.

[0037] The antibacterial agent in this embodiment is nano silver powder; The plasticizer is octyl phthalate; the silane coupling agent is silane coupling agent KH560; and the heat stabilizer is zinc stearate.

[0038] The preparation method of the modified filler of this embodiment is: S11: irradiating the calcined talc in a proton irradiation box until the irradiation is completed, thereby obtaining irradiated calcined talc; S12: 8 parts of irradiated calcined talc, 3 parts of nano-silica sol, 5 parts of carboxymethyl cellulose and 8 parts of sodium alginate solution were mixed and ball-milled for 1 hour at a ball-milling speed of 750 r / min. After the ball-milling was completed, a calcined talc solution was obtained; S13: The modifier and calcined talc solution are mixed in a weight ratio of 2:5 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a modified filler.

[0039] The mass fraction of the sodium alginate solution in this embodiment is 5%.

[0040] In this embodiment, the irradiation time in the proton irradiation box is 30 minutes, and the irradiation power is 400W.

[0041] The modifier in this embodiment is yttrium oxide.

[0042] The preparation method of the modified strontium oxide agent of this embodiment is: S101: Stirring strontium oxide and lanthanum nitrate solution in a weight ratio of 5:2 to obtain strontium oxide solution; S102: 5 parts of strontium oxide solution are added to 6 parts of sodium citrate aqueous solution, and then 3 parts of silane coupling agent KH550 and 3 parts of carboxymethyl cellulose are added, and the mixture is ball-milled. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified strontium oxide agent.

[0043] The mass fraction of the lanthanum nitrate solution in this embodiment is 5%; the mass fraction of the sodium citrate aqueous solution is 6%.

[0044] The ball milling speed of the blended ball milling treatment in this embodiment is 550 r / min, and the ball milling is performed for 2 h.

[0045] The composite high temperature resistant leather material is prepared by a preparation method of a composite high temperature resistant leather material in this embodiment.

[0046] Example 3. A method for preparing a composite high temperature resistant leather material according to the present embodiment comprises the following steps: Step 1: 37.5 parts of PVC resin, 5.5 parts of plasticizer, 3.5 parts of heat stabilizer, 3.5 parts of silane coupling agent and 6.5 parts of antibacterial agent are stirred and mixed to obtain a first material body; Step 2: crush the cowhide through 100 meshes, and then soak it in a sufficient amount of 5% by mass sodium hydroxide solution for 2 hours at a soaking temperature of 70°C. After the soaking is completed, continue to crush, grind, filter, and dry to obtain leather fibers; Step 3: 5.5 parts of modified filler, 3.5 parts of leather fiber, and 3.5 parts of silicone oil are fully blended to obtain a second material body; Step 4: 45 parts of the first material, 8 parts of the second material and 3.5 parts of the modified strontium oxide agent are fully mixed, extruded at 200°C, calendered at 180°C, and finally cooled to room temperature to obtain a composite high-temperature resistant leather material.

[0047] The antibacterial agent in this embodiment is nano silver powder; The plasticizer is octyl phthalate; the silane coupling agent is silane coupling agent KH560; and the heat stabilizer is zinc stearate.

[0048] The preparation method of the modified filler of this embodiment is: S11: irradiating the calcined talc in a proton irradiation box until the irradiation is completed, thereby obtaining irradiated calcined talc; S12: 6.5 parts of irradiated calcined talc, 2 parts of nano-silica sol, 3.5 parts of carboxymethyl cellulose and 6.5 parts of sodium alginate solution were mixed and ball-milled for 1 hour at a ball-milling speed of 750 r / min. After the ball-milling was completed, a calcined talc solution was obtained; S13: The modifier and calcined talc solution are mixed in a weight ratio of 2:5 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a modified filler.

[0049] The mass fraction of the sodium alginate solution in this embodiment is 3.5%.

[0050] The irradiation time in the proton irradiation box of this embodiment is 25 minutes, and the irradiation power is 370W.

[0051] The modifier in this embodiment is yttrium oxide.

[0052] The preparation method of the modified strontium oxide agent of this embodiment is: S101: Stirring strontium oxide and lanthanum nitrate solution in a weight ratio of 5:2 to obtain strontium oxide solution; S102: 3.5 parts of strontium oxide solution are added to 4 parts of sodium citrate aqueous solution, and then 2.5 parts of silane coupling agent KH550 and 2 parts of carboxymethyl cellulose are added, and the mixture is ball-milled. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified strontium oxide agent.

[0053] The mass fraction of the lanthanum nitrate solution in this embodiment is 3.5%; the mass fraction of the sodium citrate aqueous solution is 5%.

[0054] The ball milling speed of the blended ball milling treatment in this embodiment is 500 r / min, and the ball milling is performed for 2 h.

[0055] The composite high temperature resistant leather material is prepared by a preparation method of a composite high temperature resistant leather material in this embodiment.

[0056] Comparative Example 1. The difference from Example 3 is that no modified filler is added.

[0057] Comparative Example 2. The difference from Example 3 is that the preparation method of the modified filler is different; no modifier treatment is used.

[0058] Comparative Example 3. The difference from Example 3 is that no irradiated calcined talc or carboxymethyl cellulose is added in the preparation of the calcined talc liquid.

[0059] Comparative Example 4. The difference from Example 3 is that no modified strontium oxide agent is added.

[0060] Comparative Example 5. The difference from Example 3 is that no lanthanum nitrate solution and silane coupling agent KH550 were added in the preparation of the modified strontium oxide agent.

[0061] The products of Examples 1-3 and Comparative Examples 1-5 were tested for antibacterial and self-cleaning properties under normal conditions, and placed at 65°C for 12 hours, and then scrubbed 10 times with a scrubbing force of 5N to test high temperature resistance and scrubbing stability. The performance tests are as follows:

[0062] It can be seen from Comparative Examples 1-5 and Example 3 that the product of Example 3 has excellent antibacterial and self-cleaning properties, and at the same time, the product has significant effects on high temperature resistance and scrubbing stability; the present invention does not add modified fillers and modified strontium oxide agents, and the performance of the product deteriorates significantly. The two are coordinated and work together to achieve significant product performance effects; the preparation methods of the modified fillers are different; no modifier treatment is used, irradiated calcined talc and carboxymethyl cellulose are not added in the preparation of the calcined talc liquid, no modified strontium oxide agent is added, and lanthanum nitrate solution and silane coupling agent KH550 are not added in the preparation of the modified strontium oxide agent. The performance of the products all tends to deteriorate. Only when the product raw materials are obtained by the specific method of the present invention, the product performance effect is most obvious.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0064] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for preparing a composite high temperature resistant leather material, characterized in that: The steps include: Step 1: Stir and mix 35-40 parts of PVC resin, 4-7 parts of plasticizer, 2-5 parts of heat stabilizer, 2-5 parts of silane coupling agent and 5-8 parts of antibacterial agent to obtain a first material body; Step 2: crush the cowhide through 100 meshes, and then soak it in a sufficient amount of 5% by mass sodium hydroxide solution for 2 hours at a soaking temperature of 70°C. After the soaking is completed, continue to crush, grind, filter, and dry to obtain leather fibers; Step 3: Blend 4-7 parts of modified filler, 2-5 parts of leather fiber, and 2-5 parts of silicone oil to obtain a second material; Step 4: 40-50 parts of the first material, 6-10 parts of the second material and 2-5 parts of the modified strontium oxide agent are fully mixed, extruded at 200°C, calendered at 180°C, and finally cooled to room temperature to obtain a composite high temperature resistant leather material.

2. The method for preparing a composite high temperature resistant leather material according to claim 1, characterized in that: The antibacterial agent is nano silver powder; The plasticizer is octyl phthalate; the silane coupling agent is silane coupling agent KH560; and the heat stabilizer is zinc stearate.

3. The method for preparing a composite high temperature resistant leather material according to claim 1, characterized in that: The preparation method of the modified filler is: S11: irradiating the calcined talc in a proton irradiation box until the irradiation is completed, thereby obtaining irradiated calcined talc; S12: 5-8 parts of irradiated calcined talc, 1-3 parts of nano-silica sol, 2-5 parts of carboxymethyl cellulose, and 5-8 parts of sodium alginate solution are mixed and ball-milled for 1 hour at a ball-milling speed of 750 r / min. After the ball-milling is completed, a calcined talc liquid is obtained; S13: The modifier and calcined talc solution are mixed in a weight ratio of 2:5 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a modified filler.

4. The method for preparing a composite high temperature resistant leather material according to claim 3, characterized in that: The mass fraction of the sodium alginate solution is 2-5%.

5. The method for preparing a composite high temperature resistant leather material according to claim 3, characterized in that: The irradiation time in the proton irradiation box is 20-30 minutes, and the irradiation power is 350-400W.

6. The method for preparing a composite high temperature resistant leather material according to claim 3, characterized in that: The modifier is yttrium oxide.

7. The method for preparing a composite high temperature resistant leather material according to claim 1, characterized in that: The preparation method of the modified strontium oxide agent is: S101: Stirring strontium oxide and lanthanum nitrate solution in a weight ratio of 5:2 to obtain strontium oxide solution; S102: 2-5 parts of strontium oxide solution are added to 2-6 parts of sodium citrate aqueous solution, followed by adding 2-3 parts of silane coupling agent KH550 and 1-3 parts of carboxymethyl cellulose, and the mixture is ball-milled. After the ball-milling is completed, the mixture is filtered and dried to obtain a modified strontium oxide agent.

8. The method for preparing a composite high temperature resistant leather material according to claim 7, characterized in that: The mass fraction of the lanthanum nitrate solution is 2-5%; the mass fraction of the sodium citrate aqueous solution is 4-6%.

9. The method for preparing a composite high temperature resistant leather material according to claim 7, characterized in that: The ball milling speed of the blended ball milling treatment is 450-550 r / min, and the ball milling is performed for 2 hours.

10. A composite high temperature resistant leather material prepared by the method for preparing a composite high temperature resistant leather material according to any one of claims 1 to 9.

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