Breathable silicone leather for car seat cushion and preparation method thereof

Abstract

The present invention belongs to the technical field of silicone leather, and specifically discloses a breathable silicone leather for automobile seat cushions and a preparation method thereof, comprising a base fabric and a breathable surface layer coated on the surface of the base fabric, wherein the breathable surface layer comprises the following raw materials by mass percentage: 60-80% organic silica gel, 15-20% silk fibroin aqueous solution, 5-10% polyurethane emulsion, 1-5% hardener, and 1-5% penetrant. The present invention uses the silk fibroin aqueous solution and the polyurethane emulsion simultaneously, which can cooperate with each other to improve the silicone leather's good air permeability while ensuring the toughness and wear resistance of the silicone leather.

Description

Technical Field

[0001] The invention belongs to the technical field of silicone leather, and in particular relates to a breathable silicone leather for a car seat cushion and a preparation method thereof. Background Art

[0002] Silicone leather is a synthetic leather product, usually made of fabric as the base and coated with silicone polymer. Silicone leather has the advantages of no odor, hydrolysis resistance, weather resistance, environmental protection, easy cleaning, high and low temperature resistance, acid, alkali and salt resistance, light resistance, heat aging resistance, yellowing resistance, bending resistance, sterilization, strong color fastness, etc. It can be used in outdoor furniture, yachts and ships, soft package decoration, car interior, public facilities, sporting goods, medical equipment and other fields.

[0003] When silicone leather is used in automobile interiors, such as automobile seat cushions, the requirements for its air permeability are improved. The air permeability of silicone leather mainly depends on the air permeability of the coating on the base fabric. Therefore, developing a coating material with excellent air permeability is the key to preparing breathable silicone leather. To this end, the present invention proposes a breathable silicone leather for automobile seat cushions and a preparation method thereof. Summary of the invention

[0004] In order to solve the above problems, the primary purpose of the present invention is to provide a breathable silicone leather for car seat cushions and a preparation method thereof.

[0005] The specific technical solutions of the present invention include:

[0006] The invention provides a breathable silicone leather for automobile seat cushions, comprising a base fabric and a breathable surface layer coated on the surface of the base fabric, wherein the breathable surface layer comprises the following raw materials by mass percentage: 60-80% organic silicone, 15-20% silk fibroin aqueous solution, 5-10% polyurethane emulsion, 1-5% hardener and 1-5% penetrant.

[0007] As a further optimization solution of the present invention, the base fabric is polyester fiber or viscose fiber.

[0008] As a further optimization scheme of the present invention, in step (3), the organic silica gel comprises the following raw materials in percentage by mass: 50-60% polysiloxane, 20-30% fumed silica, 0.01-0.3% platinum catalyst and 0.5-1% methyl hydrogen polysiloxane.

[0009] As a further optimization scheme of the present invention, the silk fibroin aqueous solution is prepared by dissolving the silk fibroin in a solvent and then dialyzing it, and the solvent is a mixed solution of calcium chloride, water and ethanol.

[0010] The present invention also provides a method for preparing a breathable silicone leather for a car seat cushion as described above, comprising the following steps:

[0011] (1) weighing organic silica gel, silk fibroin aqueous solution, polyurethane emulsion, hardener, and penetrant raw materials according to the component ratio and mixing and diluting with a diluent in a mass ratio of 1:1 to obtain a first mixture;

[0012] (2) coating the first mixture obtained in step (1) on a release paper to form a breathable surface layer, covering the side of the breathable surface layer away from the release paper with a base fabric, and placing the base fabric into an oven for heating and curing;

[0013] (3) After curing is completed, the roll is rolled up and the release paper is peeled off to produce the breathable silicone leather for the car seat cushion.

[0014] As a further optimization scheme of the present invention, in the step (2), the thickness of the breathable surface layer is controlled to be 0.5-0.8 mm.

[0015] In summary, the beneficial effects of the present invention are:

[0016] (1) The composition of the present invention is simple, safe, non-toxic and harmless.

[0017] (2) The present invention uses a solvent to dissolve silk fibroin and then dialyzes to obtain a silk fibroin aqueous solution, which is used to prepare a breathable surface layer of silicone leather, and can effectively improve the breathability of the silicone leather.

[0018] (3) The present invention uses the silk fibroin aqueous solution and the polyurethane emulsion simultaneously, which can work together to improve the air permeability of the silicone leather while ensuring the toughness and wear resistance of the silicone leather. DETAILED DESCRIPTION

[0019] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example 1

[0021] This embodiment provides a method for preparing breathable silicone leather for automobile seat cushions, comprising the following steps:

[0022] (1) weighing organic silica gel, silk fibroin aqueous solution, polyurethane emulsion, hardener, and penetrant raw materials according to the component ratio and mixing and diluting with a diluent in a mass ratio of 1:1 to obtain a first mixture;

[0023] Among them, by mass percentage: organic silica gel 60%, silk protein aqueous solution 20%, polyurethane emulsion 10%, hardener 5%, penetrant 5%, diluent is white oil;

[0024] The organic silica gel comprises the following raw materials by mass percentage: 60% polysiloxane, 39% fumed silica, 0.3% platinum catalyst and 0.7% methyl hydrogen polysiloxane;

[0025] The silk fibroin aqueous solution is prepared by dissolving the silk fibroin in a solvent and then dialyzing the solution, wherein the solvent is a mixed solution of calcium chloride, water and ethanol, and the concentration of the silk fibroin aqueous solution is 100 mg / ml;

[0026] (2) coating the first mixture obtained in step (1) on a release paper to form a breathable surface layer, wherein the thickness of the breathable surface layer is controlled to be 0.5-0.8 μm, and covering the side of the breathable surface layer away from the release paper with a polyester fiber base cloth, and placing the mixture in an oven for heating and curing;

[0027] (3) After curing is completed, the roll is rolled up and the release paper is peeled off to produce the breathable silicone leather for the car seat cushion.

[0028] Example 2

[0029] This embodiment provides a method for preparing breathable silicone leather for automobile seat cushions, comprising the following steps:

[0030] (1) weighing organic silica gel, silk fibroin aqueous solution, polyurethane emulsion, hardener, and penetrant raw materials according to the component ratio and mixing and diluting with a diluent in a mass ratio of 1:1 to obtain a first mixture;

[0031] Among them, by mass percentage: organic silica gel 65%, silk protein aqueous solution 15%, polyurethane emulsion 10%, hardener 5%, penetrant 5%, diluent is white oil;

[0032] The organic silica gel comprises the following raw materials by mass percentage: 60% polysiloxane, 39% fumed silica, 0.3% platinum catalyst and 0.7% methyl hydrogen polysiloxane;

[0033] The silk fibroin aqueous solution is prepared by dissolving the silk fibroin in a solvent and then dialyzing the solution, wherein the solvent is a mixed solution of calcium chloride, water and ethanol, and the concentration of the silk fibroin aqueous solution is 100 mg / ml;

[0034] (2) coating the first mixture obtained in step (1) on a release paper to form a breathable surface layer, wherein the thickness of the breathable surface layer is controlled to be 0.5-0.8 μm, and covering the side of the breathable surface layer away from the release paper with a polyester fiber base cloth, and placing the mixture in an oven for heating and curing;

[0035] (3) After curing is completed, the roll is rolled up and the release paper is peeled off to produce the breathable silicone leather for the car seat cushion.

[0036] Example 3

[0037] This embodiment provides a method for preparing non-fluorescent food-grade silica gel, which specifically includes the following steps:

[0038] (1) weighing organic silica gel, silk fibroin aqueous solution, polyurethane emulsion, hardener, and penetrant raw materials according to the component ratio and mixing and diluting with a diluent in a mass ratio of 1:1 to obtain a first mixture;

[0039] Among them, by mass percentage: organic silica gel 70%, silk protein aqueous solution 15%, polyurethane emulsion 5%, hardener 5%, penetrant 5%, diluent is white oil;

[0040] The organic silica gel comprises the following raw materials by mass percentage: 60% polysiloxane, 39% fumed silica, 0.3% platinum catalyst and 0.7% methyl hydrogen polysiloxane;

[0041] The silk fibroin aqueous solution is prepared by dissolving the silk fibroin in a solvent and then dialyzing the solution, wherein the solvent is a mixed solution of calcium chloride, water and ethanol, and the concentration of the silk fibroin aqueous solution is 100 mg / ml;

[0042] (2) coating the first mixture obtained in step (1) on a release paper to form a breathable surface layer, wherein the thickness of the breathable surface layer is controlled to be 0.5-0.8 μm, and covering the side of the breathable surface layer away from the release paper with a viscose fiber base cloth, and placing the mixture in an oven for heating and curing;

[0043] (3) After curing is completed, the roll is rolled up and the release paper is peeled off to produce the breathable silicone leather for the car seat cushion.

[0044] Comparative Example 1

[0045] This comparative example provides a method for preparing a breathable silicone leather for a car seat cushion, comprising the following steps:

[0046] (1) weighing the raw materials of organic silica gel, polyurethane emulsion, hardener, and penetrant according to the component ratio and mixing and diluting them with a diluent in a mass ratio of 1:1 to obtain a first mixture;

[0047] Among them, by mass percentage: organic silica gel 80%, polyurethane emulsion 10%, hardener 5%, penetrant 5%, diluent is white spirit;

[0048] The organic silica gel comprises the following raw materials by mass percentage: 60% polysiloxane, 39% fumed silica, 0.3% platinum catalyst and 0.7% methyl hydrogen polysiloxane;

[0049] The silk fibroin aqueous solution is prepared by dissolving the silk fibroin in a solvent and then dialyzing the solution, wherein the solvent is a mixed solution of calcium chloride, water and ethanol, and the concentration of the silk fibroin aqueous solution is 100 mg / ml;

[0050] (2) coating the first mixture obtained in step (1) on a release paper to form a breathable surface layer, wherein the thickness of the breathable surface layer is controlled to be 0.5-0.8 mm, and covering the side of the breathable surface layer away from the release paper with a polyester fiber base cloth, and placing the mixture in an oven for heating and curing;

[0051] (3) After curing is completed, the roll is rolled up and the release paper is peeled off to produce the breathable silicone leather for the car seat cushion.

[0052] Comparative Example 2

[0053] This comparative example provides a method for preparing a breathable silicone leather for a car seat cushion, comprising the following steps:

[0054] (1) weighing organic silica gel, silk fibroin aqueous solution, hardener, and penetrant raw materials according to the component ratio and mixing and diluting with a diluent in a mass ratio of 1:1 to obtain a first mixture;

[0055] Among them, by mass percentage: organic silica gel 70%, silk protein aqueous solution 20%, hardener 5%, penetrant 5%, diluent is white oil;

[0056] The organic silica gel comprises the following raw materials by mass percentage: 60% polysiloxane, 39% fumed silica, 0.3% platinum catalyst and 0.7% methyl hydrogen polysiloxane;

[0057] The silk fibroin aqueous solution is prepared by dissolving the silk fibroin in a solvent and then dialyzing the solution, wherein the solvent is a mixed solution of calcium chloride, water and ethanol;

[0058] (2) coating the first mixture obtained in step (1) on a release paper to form a breathable surface layer, wherein the thickness of the breathable surface layer is controlled to be 0.5-0.8 mm, and covering the side of the breathable surface layer away from the release paper with a polyester fiber base cloth, and placing the mixture in an oven for heating and curing;

[0059] (3) After curing is completed, the roll is rolled up and the release paper is peeled off to produce the breathable silicone leather for the car seat cushion.

[0060] Comparative Example 3

[0061] This comparative example provides a method for preparing a breathable silicone leather for a car seat cushion, comprising the following steps:

[0062] (1) weighing raw materials of organic silica gel, hardener, and penetrant according to the component ratio and mixing and diluting with a diluent in a mass ratio of 1:1 to obtain a first mixture;

[0063] Among them, by mass percentage: organic silica gel 90%, hardener 5%, penetrant 5%, diluent is white spirit;

[0064] The organic silica gel comprises the following raw materials by mass percentage: 60% polysiloxane, 39% fumed silica, 0.3% platinum catalyst and 0.7% methyl hydrogen polysiloxane;

[0065] The silk fibroin aqueous solution is prepared by dissolving the silk fibroin in a solvent and then dialyzing the solution, wherein the solvent is a mixed solution of calcium chloride, water and ethanol;

[0066] (2) coating the first mixture obtained in step (1) on a release paper to form a breathable surface layer, wherein the thickness of the breathable surface layer is controlled to be 0.5-0.8 mm, and covering the side of the breathable surface layer away from the release paper with a polyester fiber base cloth, and placing the mixture in an oven for heating and curing;

[0067] (3) After curing is completed, the roll is rolled up and the release paper is peeled off to produce the breathable silicone leather for the car seat cushion.

[0068] The silicone leather samples prepared according to the preparation methods of Examples 1-3 and Comparative Examples 1-3 were subjected to air permeability test, mechanical test and wear test.

[0069] Air permeability test: The test standard for leather air permeability is QB / T 2799-2006 "Method for determining air permeability of leather". This standard uses pressure difference to test air permeability to evaluate the air permeability of leather. The test is conducted based on the principle of this standard.

[0070] Mechanical test: Reference standard: "QB / T2711-2005 Leather physical and mechanical test Determination of tearing force: bilateral tearing" is tested according to the principle of this standard;

[0071] Wear test: Refer to the standard "GB / T2726-2005 Determination of wear resistance of leather physical and mechanical tests" and conduct the test based on the principles of this standard.

[0072] The test results are shown in Table 1.

[0073] Table 1 Results Statistics

[0074]

[0075] The results in Table 1 show that the air permeability of the silicone leather prepared in Examples 1-3 of the present invention is more prominent, and the mechanical characteristics of the silicone leather, such as elongation at break, tensile strength and wear performance, are also relatively excellent. However, since the air permeable surface layer component of Comparative Example 1 lacks the silk fibroin aqueous solution, Comparative Example 2 lacks the polyurethane emulsion, and Comparative Example 3 lacks both the silk fibroin aqueous solution and the polyurethane emulsion, the air permeability of the silicone leather decreases. This shows that the simultaneous use of the silk fibroin aqueous solution and the polyurethane emulsion can cooperate with each other to improve the air permeability of the silicone leather.

[0076] In addition, it can be seen from Comparative Example 1 that the use of silk fibroin aqueous solution increases the air permeability of silicone leather, while causing a decrease in the elongation at break and tensile strength of the silicone leather, and the toughness of the silicone leather is reduced. When only polyurethane emulsion is used in Comparative Example 2, the elongation at break and tensile strength of the silicone leather are higher than those of Comparative Example 1, and the toughness of the silicone leather is better than that of Comparative Example 1. This shows that the simultaneous use of silk fibroin aqueous solution and polyurethane emulsion can synergize with each other to improve the toughness of the silicone leather.

[0077] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A breathable silicone leather for car seat cushions, comprising a base fabric, characterized in that: It also includes a breathable surface layer coated on the surface of the base fabric, the breathable surface layer includes the following raw materials by mass percentage: 60-80% organic silica gel, 15-20% silk fibroin aqueous solution, 5-10% polyurethane emulsion, 1-5% hardener, and 1-5% penetrant; The organic silica gel comprises the following raw materials in percentage by mass: 50-60% polysiloxane, 20-40% fumed silica, 0.01-0.3% platinum catalyst and 0.5-1% methyl hydrogen polysiloxane. The silk fibroin aqueous solution is prepared by dissolving the silk fibroin in a solvent and then dialyzing it. The solvent is a mixed solution of calcium chloride, water and ethanol.

2. The breathable silicone leather for car seat cushion according to claim 1, characterized in that: The base fabric is polyester fiber or viscose fiber.

3. The breathable silicone leather for car seat cushion according to claim 1, characterized in that: The concentration of the silk fibroin aqueous solution is 100-500 mg / ml.

4. A method for preparing the breathable silicone leather for car seat cushions as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: (1) weighing organic silica gel, silk fibroin aqueous solution, polyurethane emulsion, hardener, and penetrant raw materials according to the component ratio and mixing and diluting with a diluent in a mass ratio of 1:1 to obtain a first mixture; (2) coating the first mixture obtained in step (1) on a release paper to form a breathable surface layer, covering the side of the breathable surface layer away from the release paper with a base fabric, and placing the base fabric into an oven for heating and curing; (3) After curing is completed, the roll is rolled up and the release paper is peeled off to produce the breathable silicone leather for the car seat cushion.

5. The method for preparing the breathable silicone leather for automobile seat cushion according to claim 4, characterized in that: In the step (2), the thickness of the breathable surface layer is controlled to be 0.5-0.8 mm.

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