High-temperature-resistant artificial leather and preparation method thereof

Abstract

The invention relates to the technical field of polyvinyl chloride artificial leather, and particularly discloses high-temperature-resistant artificial leather and a preparation method thereof. The high-temperature-resistant artificial leather is prepared from the following components in parts by weight: 75 to 90 parts of high-polymerization-degree polyvinyl chloride resin, 6 to 15 parts of modified hydrotalcite, 15 to 24 parts of bamboo charcoal-polyester composite fiber, 20 to 30 parts of plasticizer, 1 to 3 parts of stabilizer, 5 to 12 parts of pigment and 1 to 3 parts of antioxidant. The preparation method of the high-temperature-resistant artificial leather comprises the following steps: S1, mixing high-polymerization-degree polyvinyl chloride resin, modified hydrotalcite, bamboo charcoal-polyester composite fibers, a plasticizer, a stabilizer, a pigment and an antioxidant to form a uniform mixture; and S2, heating the mixture to a molten state, carrying out calendaring molding through a calendaring machine, cooling, cutting, and rolling to obtain the high-temperature-resistant artificial leather product. The high-temperature-resistant artificial leather prepared by the invention has excellent heat resistance and ageing resistance.

Description

Technical Field

[0001] The present application relates to the technical field of polyvinyl chloride artificial leather, and in particular to a high temperature resistant artificial leather and a preparation method thereof. Background Art

[0002] Traditional polyvinyl chloride (PVC) artificial leather is mostly made of polyvinyl chloride resin with an average degree of polymerization of 1000-1300. Its heat resistance and mechanical strength are limited and cannot meet the needs of long-term use in high temperature environments. With the advancement of materials science, the market has put forward higher requirements on the high temperature resistance of artificial leather. High-polymerization polyvinyl chloride, with an average degree of polymerization of more than 1700, has better heat resistance, cold resistance, fatigue resistance and mechanical strength. However, how to effectively use high-polymerization polyvinyl chloride to prepare high-temperature resistant artificial leather is still a challenge facing the current industry. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present application provides a high temperature resistant artificial leather and a preparation method thereof.

[0004] On the one hand, the present application provides a high temperature resistant artificial leather, which includes the following components by weight: 75-90 parts of high polymerization degree polyvinyl chloride resin, 6-15 parts of modified hydrotalcite, 15-24 parts of bamboo charcoal-polyester composite fiber, 20-30 parts of plasticizer, 1-3 parts of stabilizer, 5-12 parts of pigment, and 1-3 parts of antioxidant.

[0005] By adopting the above technical solution, the present application reasonably selects each component and its ratio, and the high-polymerization polyvinyl chloride resin, modified hydrotalcite, bamboo charcoal-polyester composite fiber, plasticizer, stabilizer and antioxidant work together to produce artificial leather that can not only remain stable in a high temperature environment, but also has excellent high temperature resistance and aging resistance, and can also maintain good mechanical properties during long-term use. In practical applications, it can meet a variety of high-performance requirements.

[0006] Optionally, the average degree of polymerization of the high-polymerization polyvinyl chloride resin is 2000-4500.

[0007] Optionally, the average degree of polymerization of the high-polymerization polyvinyl chloride resin is 2500-3500.

[0008] Optionally, the preparation method of the modified hydrotalcite comprises the following steps: A1. Weigh calcium nitrate and aluminum nitrate and dissolve them in water to obtain solution A. A2. Under nitrogen environment, add 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid to solution A obtained in step S1, mix and stir for 1-2 hours to obtain solution B; A3. Crystallize solution B at 150-155° C. for 15-18 h, filter, wash, dry and grind after cooling to obtain the modified hydrotalcite.

[0009] By adopting the above technical scheme, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid is an excellent anionic light stabilizer that can absorb ultraviolet rays. However, due to the small molecular weight and poor thermal stability of 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, it is easy to evaporate and migrate from the polymer matrix. Hydrotalcite is an anionic layered compound, the main body of which is composed of hydroxides of two metals, and contains anions between layers. Due to its structural characteristics, it is also called a dihydroxy layered composite metal hydroxide. The interlayer anions of hydrotalcite have the characteristics of ion exchange. Based on this, an ionic ultraviolet absorber is inserted between its layers and then added to the polymer, so that the polymer not only has anti-aging properties, but also can improve the migration problem of the light stabilizer in the polymer. Based on this principle, the modified hydrotalcite prepared in this application can effectively improve the aging resistance of artificial leather.

[0010] Optionally, the weight ratio of calcium nitrate, aluminum nitrate, water and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid is (8-11): (5-8): 100: (4-6).

[0011] Optionally, the preparation method of the bamboo charcoal-polyester composite fiber includes the following steps: crushing the activated bamboo charcoal to prepare sub-nanoscale bamboo charcoal powder, then adding 5-7% by mass of the bamboo charcoal powder into polyester fiber pulp, stirring and mixing, and spinning to obtain the bamboo charcoal-polyester composite fiber.

[0012] By adopting the above technical scheme, the bamboo charcoal-polyester composite fiber prepared in the present application has good compatibility with high-polymerization degree polyvinyl chloride resin, and can be effectively enhanced in high temperature resistance and mechanical strength of artificial leather when applied to artificial leather, and the toughness of artificial leather is significantly enhanced.

[0013] Optionally, the plasticizer is selected from epoxy soybean oil and phthalate plasticizers.

[0014] Optionally, the stabilizer is a calcium zinc stabilizer.

[0015] Optionally, the antioxidant is a hindered phenol antioxidant.

[0016] In a second aspect, the present application provides a method for preparing the above-mentioned high temperature resistant artificial leather, comprising the following steps: S1, mixing high polymerization degree polyvinyl chloride resin, modified hydrotalcite, bamboo charcoal-polyester composite fiber, plasticizer, stabilizer, pigment and antioxidant to form a uniform mixture; S2, heating the mixture to a molten state, calendering the mixture through a calendering machine, and then cooling, cutting, and rolling the mixture to obtain the high temperature resistant artificial leather product.

[0017] By adopting the above technical scheme, the present application mixes various raw material components, the production process is simple, the preparation efficiency is high, and high-temperature resistant artificial leather with excellent performance in all aspects is obtained.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The present application uses reasonable selection of components and their proportions, high-polymerization polyvinyl chloride resin, modified hydrotalcite, bamboo charcoal-polyester composite fiber, plasticizer, stabilizer and antioxidant to produce artificial leather that is not only stable in high temperature environments, but also has excellent high temperature resistance and aging resistance, and can also maintain good mechanical properties during long-term use. In practical applications, it can meet a variety of high-performance requirements.

[0019] 2. In the modified hydrotalcite prepared in the present application, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid is an excellent anionic light stabilizer that can absorb ultraviolet rays. However, due to the small molecular weight and poor thermal stability of 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, it is easy to evaporate and migrate from the polymer matrix. Hydrotalcite is an anionic layered compound, the main body of which is composed of two metal hydroxides, and contains anions between layers. Due to its structural characteristics, it is also called a dihydroxy layered composite metal hydroxide. The interlayer anions of hydrotalcite have the characteristics of ion exchange. Based on this, an ionic ultraviolet absorber is inserted between its layers and then added to the polymer, so that the polymer not only has anti-aging properties, but also can improve the migration problem of the light stabilizer in the polymer. Based on this principle, the modified hydrotalcite prepared in the present application can effectively improve the aging resistance of artificial leather.

[0020] 3. The bamboo charcoal-polyester composite fiber prepared in the present application has good compatibility with high-polymerization degree polyvinyl chloride resin. When applied to artificial leather, it can effectively enhance the high temperature resistance and mechanical strength of the artificial leather, and the toughness of the artificial leather is significantly enhanced.

[0021] 4. The present application mixes various raw material components, has a simple production process, and has high preparation efficiency, and obtains high-temperature resistant artificial leather with excellent performance in all aspects. DETAILED DESCRIPTION

[0022] The present application is further described in detail below with reference to the embodiments.

[0023] The present application designs a high temperature resistant artificial leather, which comprises the following components by weight: 75-90 parts of high polymerization degree polyvinyl chloride resin, 6-15 parts of modified hydrotalcite, 15-24 parts of bamboo charcoal-polyester composite fiber, 20-30 parts of plasticizer, 1-3 parts of stabilizer, 5-12 parts of pigment, and 1-3 parts of antioxidant.

[0024] The high temperature resistant artificial leather of the present application is prepared by the following method, comprising the following steps: S1, mixing high polymerization degree polyvinyl chloride resin, modified hydrotalcite, bamboo charcoal-polyester composite fiber, plasticizer, stabilizer, pigment and antioxidant to form a uniform mixture; S2, heating the mixture to a molten state, calendering the mixture through a calendering machine, and then cooling, cutting, and rolling the mixture to obtain the high temperature resistant artificial leather product.

[0025] The present application uses reasonable selection of components and their proportions, high-polymerization polyvinyl chloride resin, modified hydrotalcite, bamboo charcoal-polyester composite fiber, plasticizer, stabilizer and antioxidant to produce artificial leather that is not only stable in high-temperature environments, but also has excellent high-temperature resistance and aging resistance, and can also maintain good mechanical properties during long-term use. In practical applications, it can meet a variety of high-performance requirements.

[0026] The present invention mixes various raw material components, has a simple production process, and has high preparation efficiency, and obtains high-temperature resistant artificial leather with excellent performance in all aspects. Specific embodiments

[0027] Preparation Example 1 This preparation example provides a modified hydrotalcite, and the preparation method thereof comprises the following steps: A1. Weigh calcium nitrate and aluminum nitrate and dissolve them in water to obtain solution A. A2. Under nitrogen environment, add 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid to solution A obtained in step S1, mix and stir for 1 hour to obtain solution B; A3. Crystallize solution B at 150° C. for 18 h, filter, wash, dry and grind after cooling to obtain the modified hydrotalcite.

[0028] The weight ratio of calcium nitrate, aluminum nitrate, water and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid is 8:5:100:4.

[0029] Preparation Example 2 This preparation example provides a modified hydrotalcite, and the preparation method thereof comprises the following steps: A1. Weigh calcium nitrate and aluminum nitrate and dissolve them in water to obtain solution A. A2. Under nitrogen environment, add 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid to solution A obtained in step S1, mix and stir for 1.5 hours to obtain solution B; A3. Crystallize solution B at 152° C. for 16 h, filter, wash, dry and grind after cooling to obtain the modified hydrotalcite.

[0030] The weight ratio of calcium nitrate, aluminum nitrate, water and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid is 10:6:100:5.

[0031] Preparation Example 3 This preparation example provides a modified hydrotalcite, and the preparation method thereof comprises the following steps: A1. Weigh calcium nitrate and aluminum nitrate and dissolve them in water to obtain solution A. A2. Under nitrogen environment, add 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid to solution A obtained in step S1, mix and stir for 2 hours to obtain solution B; A3. Crystallize solution B at 155° C. for 15 h, cool it, filter it, wash it, dry it, and grind it to obtain the modified hydrotalcite.

[0032] The weight ratio of calcium nitrate, aluminum nitrate, water and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid is 11:8:100:6.

[0033] Preparation Example 4 This preparation example provides a bamboo charcoal-polyester composite fiber, and its preparation method includes the following steps: crushing activated bamboo charcoal to prepare sub-nanoscale bamboo charcoal powder, then adding 6% by mass of the bamboo charcoal powder into polyester fiber pulp, stirring and mixing, and spinning to obtain the bamboo charcoal-polyester composite fiber.

[0034] Example 1 A high temperature resistant artificial leather and a preparation method thereof, comprising the following components by weight: 75 parts of high polymerization degree polyvinyl chloride resin, 6 parts of modified hydrotalcite, 15 parts of bamboo charcoal-polyester composite fiber, 20 parts of plasticizer, 1 part of stabilizer, 5 parts of pigment and 1 part of antioxidant.

[0035] Among them, the average polymerization degree of high-polymerization polyvinyl chloride resin is 2000-2500, the plasticizer is epoxidized soybean oil, the stabilizer is calcium zinc stabilizer, the antioxidant is hindered phenol antioxidant, the modified hydrotalcite is prepared by Preparation Example 1, and the bamboo charcoal-polyester composite fiber is prepared by Preparation Example 4.

[0036] A method for preparing high temperature resistant artificial leather, characterized in that it comprises the following steps: S1, mixing high polymerization degree polyvinyl chloride resin, modified hydrotalcite, bamboo charcoal-polyester composite fiber, plasticizer, stabilizer, pigment and antioxidant to form a uniform mixture; S2, heating the mixture to a molten state, calendering the mixture through a calendering machine, and then cooling, cutting, and rolling the mixture to obtain the high temperature resistant artificial leather product.

[0037] Example 2 The difference between this embodiment and embodiment 1 is that a high temperature resistant artificial leather and a preparation method thereof include the following components by weight: 83 parts of high polymerization degree polyvinyl chloride resin, 12 parts of modified hydrotalcite, 20 parts of bamboo charcoal-polyester composite fiber, 25 parts of plasticizer, 2 parts of stabilizer, 8 parts of pigment, and 2 parts of antioxidant.

[0038] Among them, the average polymerization degree of high-polymerization polyvinyl chloride resin is 2000-2500, the plasticizer is a phthalate plasticizer, the stabilizer is a calcium zinc stabilizer, the antioxidant is a hindered phenol antioxidant, the modified hydrotalcite is prepared by Preparation Example 1, and the bamboo charcoal-polyester composite fiber is prepared by Preparation Example 4.

[0039] Example 3 The difference between this embodiment and embodiment 1 is that a high temperature resistant artificial leather and a preparation method thereof include the following components by weight: 90 parts of high polymerization degree polyvinyl chloride resin, 15 parts of modified hydrotalcite, 24 parts of bamboo charcoal-polyester composite fiber, 30 parts of plasticizer, 3 parts of stabilizer, 12 parts of pigment, and 3 parts of antioxidant.

[0040] Among them, the average polymerization degree of high-polymerization polyvinyl chloride resin is 2000-2500, the plasticizer is epoxidized soybean oil, the stabilizer is calcium zinc stabilizer, the antioxidant is hindered phenol antioxidant, the modified hydrotalcite is prepared by Preparation Example 1, and the bamboo charcoal-polyester composite fiber is prepared by Preparation Example 4.

[0041] Comparative Example 1 The difference between this comparative example and Example 2 is that the average degree of polymerization of the polyvinyl chloride resin is 1000-2000.

[0042] Comparative Example 2 The difference between this comparative example and Example 2 is that the average degree of polymerization of the polyvinyl chloride resin is 4500-5000.

[0043] Comparative Example 3 The difference between this comparative example and Example 2 is that an equal amount of calcium aluminum hydrotalcite is used to replace the modified hydrotalcite.

[0044] Comparative Example 4 The difference between this comparative example and Example 2 is that an equal amount of polyester fibers is used to replace the bamboo charcoal-polyester composite fibers.

[0045] Example 4 The difference between this embodiment and embodiment 2 is that the average degree of polymerization of the polyvinyl chloride resin is 2500-3500.

[0046] Example 5 The difference between this embodiment and embodiment 2 is that the average degree of polymerization of the polyvinyl chloride resin is 3500-4500.

[0047] Example 6 The difference between this embodiment and embodiment 4 is that the modified hydrotalcite is prepared by Preparation Example 2.

[0048] Example 7 The difference between this embodiment and embodiment 4 is that the modified hydrotalcite is prepared by Preparation Example 3.

[0049] Experimental testing 1. Heat resistance: Test temperature (100±2)℃, test time 168h. Observe the surface state of the sample after the test, and evaluate the grayscale level of the sample surface according to GB / T 250; the higher the level, the better the heat resistance.

[0050] 2. Lightfastness: Test according to GB / T 32088. Observe the surface condition of the sample after the test and assess the grayscale grade of the sample surface according to GB / T 250. The higher the grade, the better the lightfastness.

[0051] 3.Tensile strength: Tested in accordance with GB / T 3830-1994.

[0052] 4. Folding fastness: Tested according to QB / T2714-2005.

[0053] Test results The experimental test results are shown in Table 1 below.

[0054] Table 1 Heat resistance Lightfastness Tensile strength / MPa Folding fastness / times Example 1 Level 5 Level 5 50.6 60,000 Example 2 Level 5 Level 5 52.1 60,000 Example 3 Level 5 Level 5 51.3 60,000 Comparative Example 1 Level 4-5 Level 4-5 42.5 70,000 Comparative Example 2 Level 4 Level 4 49.2 50,000 Comparative Example 3 Level 3-4 Level 3 43.8 50,000 Comparative Example 4 Level 3 Level 3-4 39.4 40,000 Example 4 Level 5 Level 5 55.6 80,000 Example 5 Level 5 Level 5 53.9 60,000 Example 6 Level 5 Level 5 58.0 80,000 Example 7 Level 5 Level 5 56.7 80,000 Results Analysis It can be seen from Examples 1-3 and Table 1 that the artificial leather prepared according to the present application has excellent high temperature resistance, aging resistance and mechanical properties.

[0055] Combining Comparative Examples 1-2, Examples 4-5 and Table 1, it can be seen that when preparing high-temperature resistant artificial leather, selecting a suitable high-polymerization degree polyvinyl chloride resin can produce a better overall performance of the high-temperature resistant artificial leather.

[0056] The difference between Comparative Example 3 and Example 2 is that, when preparing high temperature resistant artificial leather, ordinary calcium aluminum hydrotalcite is used instead of modified hydrotalcite; the difference between Comparative Example 4 and Example 2 is that, when preparing high temperature resistant artificial leather, polyester fiber is used instead of bamboo charcoal-polyester fiber. Combined with the experimental test results in Table 1, it can be seen that when preparing high temperature resistant artificial leather, the comprehensive performance of artificial leather prepared by using modified hydrotalcite and bamboo charcoal-polyester composite fiber is better.

[0057] Combining Examples 6-7, Example 4 and Table 1, it can be seen that when preparing high temperature resistant artificial leather, the modified hydrotalcite prepared in Preparation Example 2 is selected, and the comprehensive performance of the prepared high temperature resistant artificial leather is better.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high temperature resistant artificial leather, characterized in that: The composition comprises the following components by weight: 75-90 parts of high-polymerization polyvinyl chloride resin, 6-15 parts of modified hydrotalcite, 15-24 parts of bamboo charcoal-polyester composite fiber, 20-30 parts of plasticizer, 1-3 parts of stabilizer, 5-12 parts of pigment and 1-3 parts of antioxidant.

2. The high temperature resistant artificial leather according to claim 1, characterized in that: The average polymerization degree of the high-polymerization-degree polyvinyl chloride resin is 2000-4500.

3. The high temperature resistant artificial leather according to claim 2, characterized in that: The average polymerization degree of the high-polymerization polyvinyl chloride resin is 2500-3500.

4. The high temperature resistant artificial leather according to claim 1, characterized in that: The preparation method of the modified hydrotalcite comprises the following steps: A1. Weigh calcium nitrate and aluminum nitrate and dissolve them in water to obtain solution A. A2, under nitrogen environment, to the solution A obtained in step S1, add 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, mix and stir for 1-2h to obtain solution B; A3, crystallizing solution B at 150-155° C. for 15-18 h, filtering after cooling, washing, drying and grinding to obtain the modified hydrotalcite.

5. The high temperature resistant artificial leather according to claim 4, characterized in that: The weight ratio of calcium nitrate, aluminum nitrate, water and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid is (8-11): (5-8): 100: (4-6).

6. The high temperature resistant artificial leather according to claim 1, characterized in that: The preparation method of the bamboo charcoal-polyester composite fiber comprises the following steps: crushing activated bamboo charcoal to prepare sub-nanometer bamboo charcoal powder, adding 5-7% of the bamboo charcoal powder into polyester fiber pulp, stirring and mixing, and spinning to prepare the bamboo charcoal-polyester composite fiber.

7. The high temperature resistant artificial leather according to claim 1, characterized in that: The plasticizer is selected from epoxy soybean oil and phthalate plasticizers.

8. The high temperature resistant artificial leather according to claim 1, characterized in that: The stabilizer is a calcium zinc stabilizer.

9. The high temperature resistant artificial leather according to claim 1, characterized in that: The antioxidant is a hindered phenol antioxidant.

10. A method for preparing the high temperature resistant artificial leather according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, mixing high polymerization degree polyvinyl chloride resin, modified hydrotalcite, bamboo charcoal-polyester composite fiber, plasticizer, stabilizer, pigment and antioxidant to form a uniform mixture; S2, heating the mixture to a molten state, calendering the mixture through a calendering machine, and then cooling, cutting, and rolling the mixture to obtain the high temperature resistant artificial leather product.