A method for preparing a flame-retardant, highly wear-resistant elastic automobile seat cushion and the automobile seat cushion prepared therefrom

Abstract

The present invention provides a flame-retardant, highly wear-resistant elastic car seat cushion, the surface layer of which is made of a fabric blended with high-strength, high-modulus polyethylene fiber and elastic fiber with a high cool feeling, and treated with a flame-retardant coating. The flame-retardant coating component is a polysiloxane / phytic acid / polysiloxane composite coating. The present invention solves the problems of complex process, low effect, and lack of durability when imparting functionality to car seat cushions in the field. A car seat cushion is obtained that is easy to process and has excellent flame retardancy, wear resistance, and elasticity. At the same time, the cushion has a high touch coolness, which can improve the comfort of the user.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile decoration, and particularly relates to a method for preparing a flame-retardant and highly wear-resistant elastic automobile seat cushion and the prepared automobile seat cushion. Background Art

[0002] With the development of the automobile industry, the use of automobiles has increased year by year. However, in actual use, especially with the vigorous development of new energy vehicles this year, the probability of automobile spontaneous combustion has also increased rapidly; better flame retardant performance is a high-quality requirement for the development of automobile seat cushions.

[0003] As a vehicle-mounted product, the car seat cushion needs to be able to improve the user's comfort and durability. Therefore, higher requirements are also put forward for comfort such as coolness and elasticity, and durability such as wear resistance.

[0004] Conventional methods to improve the flame retardancy and wear resistance of car seat cushions are mostly to add flame retardant layers and wear resistant layers. Chinese patent CN209904591U discloses a car seat cushion that uses polyurethane elastomer as a wear resistant layer and halogen-free flame retardant polyethylene as a flame retardant layer, and achieves flame retardant and wear resistant effects by stacking layers. This is the addition of substances with various individual functionalities, which will cause the internal functions of the car seat cushion to be dispersed and fail to achieve complete efficacy. At the same time, additional ventilation holes are required, which is complex in process and has a low effect.

[0005] Chinese patent CN104497460A discloses a flame retardant car seat cushion, which obtains flame retardant properties by adding flame retardants such as aluminum hydroxide, magnesium hydroxide, red phosphorus or antimony trioxide. These materials are difficult to add and have poor durability.

[0006] Regarding comfort, such as cool feeling, most of them are in the form of adding gel layer or using ice silk. Chinese patent CN107117085A discloses an air-conditioning car seat cushion, which uses a polymer gel strip to enhance the cool feeling. However, the process is complicated, and the use of gel strips cannot form a lasting cool comfort. Summary of the invention

[0007] The purpose of the present invention is to provide a flame retardant, highly wear-resistant and elastic car seat cushion, which solves the problems of complicated process, low effect and poor durability when providing functionality to car seat cushions in the art. Thus, a car seat cushion with convenient processing, excellent flame retardancy, wear resistance and elasticity is obtained. At the same time, the seat cushion has a high contact coolness and can improve the comfort of the user.

[0008] The technical solution of the present invention is:

[0009] A method for preparing a flame-retardant and highly wear-resistant elastic car seat cushion. The surface layer of the flame-retardant and highly wear-resistant elastic car seat cushion is made of a blend of high-cooling high-strength and high-modulus polyethylene fiber and elastic fiber, and is treated with a flame-retardant coating to prepare a fabric.

[0010] The flame retardant coating of the fabric treated with the flame retardant coating comprises a polysiloxane / phytic acid / polysiloxane composite coating.

[0011] The flame retardant coating treatment process is:

[0012] (1) A certain amount of (2,3)-epoxypropyltrimethoxysilane, phytic acid, and ethanol are taken and reacted at 60-80°C; then a certain amount of methyltriethoxysilane, ethyl orthosilicate, deionized water, and ethanol are added to the above reaction system, and the temperature is raised to 80-100°C to obtain a phosphorus-containing siloxane coating after the reaction is completed.

[0013] (2) The blended fabric of high-cooling high-strength high-modulus polyethylene fiber and elastic fiber is treated in an alkaline solution at 50-70°C for 10-30 minutes.

[0014] (3) The above fabric is immersed in the silicone coating, washed with water and then dried.

[0015] (4) The above fabric is immersed in a phytic acid solution, and then the excess phytic acid is washed away with a mixed solution of deionized water and isopropyl alcohol, and the fabric is dried.

[0016] (5) The fabric is immersed in the silicone coating, washed with water, and then dried to obtain a finished fabric.

[0017] The high-cooling high-strength high-modulus polyethylene fiber has a contact coolness Qmax of 0.4 W / cm 2 The fiber breaking strength is above 10 cN / dtex, the elastic modulus is above 400 cN / dtex, the breaking elongation is below 6%; the fiber intrinsic viscosity is 1.5~10 dl.

[0018] A high molecular weight polyethylene raw material with an intrinsic viscosity of 3.5-10dl / g and a weight average molecular weight to number average molecular weight ratio (Mw / Mn) of 5-10 is melt-conveyed by a low-shear, high-conveyance screw extruder, and then enters a spinning assembly with a combined spinneret; the combined spinneret, which can orient the polyethylene melt macromolecules and release the elastic potential energy of the melt, is used to extrude filaments to obtain spun fibers; and the spun fibers are subjected to multi-stage stretching and heat setting to obtain the high-cooling, high-strength and high-modulus polyethylene fibers.

[0019] The elastic fiber is one of PTT fiber, PTT / PET parallel fiber and PBT / PET parallel fiber.

[0020] The blending ratio of the high-cooling high-strength high-modulus polyethylene fiber and the elastic fiber is 2:8~8:2.

[0021] The flame retardant and highly wear-resistant elastic automobile seat cushion is prepared by the method. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a data chart of an embodiment of the present invention.

[0023] Figure 2 It is a comparative data chart of the present invention. DETAILED DESCRIPTION

[0024] The flame-retardant, highly wear-resistant elastic car seat cushion surface layer of the present invention uses a fabric that is blended with high-cooling, high-strength, high-modulus polyethylene fiber and elastic fiber and treated with a flame-retardant coating. The high-cooling, high-strength, high-modulus polyethylene fiber is used to enhance the contact coolness of the fabric; the elastic fiber is blended with the fabric to give the fabric a concave-convex feel, thereby increasing elasticity and enhancing touch, thereby improving the comfort of the fabric.

[0025] The flame retardant coating treated fabric has a polysiloxane / phytic acid / polysiloxane composite coating. The use of polysiloxane / phytic acid / polysiloxane composite coating with high heat resistance, strong carbonization and "sandwich" structure is conducive to improving the overall flame retardancy and durability of the fabric, while having little effect on the air permeability and bending performance of the fabric, maintaining good comfort in use. When using polysiloxane alone, high flame retardancy cannot be obtained. When phytic acid is used alone, due to the hydrophilicity of phytic acid, it is impossible to obtain a more durable flame retardancy. A composite coating with a "sandwich" structure can obtain durable flame retardancy. In the composite coating, siloxane generates flame-retardant substances such as organic silicon and inorganic silicon substances at high temperatures, and the phytic acid coating can generate small molecular phosphoric acid, polyphosphoric acid, free radicals, etc. when burning. Such substances can form a dense and stable carbon layer covering the surface of the fabric to play a flame retardant role.

[0026] The flame retardant coating treatment process is:

[0027] (1) Take a certain amount of (2,3)-epoxypropyltrimethoxysilane, phytic acid, and ethanol and react them at 60-80°C; then take a certain amount of methyltriethoxysilane, ethyl orthosilicate, deionized water, and ethanol and add them to the above reaction system, and heat it to 80-100°C to obtain a phosphorus-containing siloxane coating after the reaction is completed. Through the above reaction system, a phosphorus-containing siloxane coating with stable structure and good flame retardancy can be obtained. When the reaction temperature is low, the reaction cannot be completed; when the reaction temperature is high, more ethanol evaporates and an effective stable system cannot be formed.

[0028] (2) The blended fabric of high-cooling high-strength high-modulus polyethylene fiber and elastic fiber is treated in an alkaline solution at 50-70°C for 10-30 minutes. This is the fabric pretreatment process to remove impurities such as oil on the fabric surface.

[0029] (3) The above fabric is immersed in the silicone coating, washed with water and then dried.

[0030] (4) The above fabric is immersed in a phytic acid solution, and then the excess phytic acid is washed away with a mixed solution of deionized water and isopropyl alcohol, and the fabric is dried.

[0031] (5) The fabric is immersed in the silicone coating, washed with water, and then dried to obtain a finished fabric.

[0032] Through the multi-layer coating, a flame-retardant, highly wear-resistant elastic automobile seat cushion fabric with high and lasting flame-retardant performance is obtained.

[0033] The high cool feeling high strength and high modulus polyethylene fiber of the present invention has a contact cool feeling Qmax of more than 0.4W / cm2, and utilizes high thermal conductivity to achieve a higher contact cool feeling. If the contact cool feeling is less than 0.4W / cm2, the characteristic of high cool feeling cannot be achieved. The breaking strength of the fiber is more than 10cN / dtex, the elastic modulus is more than 400cN / dtex, and the elongation at break is less than 6%, which meets the characteristics of high strength and high modulus, and realizes characteristics such as tensile strength and high performance. If the breaking strength is less than 10cN / dtex, high strength cannot be achieved; if the elastic modulus is less than 400cN / dtex, high modulus cannot be achieved; if the elongation at break is greater than 6%, it is difficult to obtain a higher crystal orientation and it is difficult to achieve high strength and high modulus. The characteristics of high strength and high modulus are used to achieve high wear resistance. The fiber characteristic viscosity is 1.5~10dl / g to maintain the melt spinning processability and high strength and high modulus characteristics of the polyethylene fiber. When the intrinsic viscosity is lower than 1.5 dl / g, high strength and high modulus cannot be obtained during low viscosity spinning; when the intrinsic viscosity is higher than 10 dl / g, it cannot be achieved by the melt spinning method.

[0034] The elastic fiber is one of PTT fiber, PTT / PET parallel fiber, and PBT / PET parallel fiber. When the elastic fiber is one of the above-mentioned fibers, permanent high recovery elasticity can be achieved. When other elastic fibers such as spandex are used, the fabric is easily deformed and the wear resistance is reduced.

[0035] The blending ratio of the high cool feeling high strength high modulus polyethylene fiber and the elastic fiber is 2:8 to 8:2. Within the above blending range, a good cool feeling, wear resistance and elasticity can be obtained. When the ratio is lower than 2:8, the content of the high cool feeling high strength high modulus polyethylene fiber is too small, and the cool feeling and wear resistance of the fabric are reduced. When the ratio is higher than 8:2, the content of the elastic fiber is too small, which will reduce the elasticity and surface convexity of the fabric and reduce the touch of the fabric.

[0036] The following examples are given to specifically illustrate the fiber and the preparation method thereof of the present invention.

[0037] The following evaluations were performed in the Examples and Comparative Examples:

[0038] (1) Intrinsic viscosity

[0039] With reference to GB / T 10247-2008 standard, the intrinsic viscosity was tested using the fully automatic Ubbelohde viscometer IV3400X produced by Hangzhou Zhuoxiang, and the unit is dl / g.

[0040] (2) Fiber breaking strength, breaking elongation and fiber elastic modulus

[0041] The stress-strain curve was measured using the tensile testing machine "Tensilon" manufactured by Intech under the conditions of a sample length of 20 cm and a tensile speed of 100% / min. The load at break was read and divided by the initial fineness to calculate the breaking strength. The deformation at break was read and divided by the sample length. The obtained value was multiplied by 100 times to calculate the breaking elongation. At the same time, the stress-strain curve was used to calculate the Young's modulus by using the fiber density and fineness. All these values ​​were obtained by repeating the operation 5 times with the same standard and calculating the simple average of the results obtained. The breaking strength was the value obtained by rounding off the second decimal place, and the breaking elongation was the value obtained by rounding off the decimal place. The fiber elastic modulus was calculated from the tangent to the maximum gradient near the origin of the stress-strain curve.

[0042] (3) Cool touch feeling of fibers and fabrics

[0043] With reference to GB / T 35263-2017 standard, the KES-QM contact coolness tester was used to make the fibers into woven fabric test pieces, and the contact coolness Qmax was tested in W / cm2.

[0044] (1) Flame retardant properties of fabrics

[0045] Refer to GB / T 5455-2014 standard to test the limiting oxygen index, afterflame time and smoldering time of fabrics.

[0046] (2) Fabric wear resistance

[0047] Refer to GB / T 21196-2007 standard to test the wear resistance grade.

[0048] (3) Fabric thickness

[0049] The thickness of woven fabrics was tested according to JIS 1096-2010.

[0050] The present invention will be described in detail below based on the embodiments.

[0051] Example 1

[0052] According to the total of 10 parts, 5 parts of high cool feeling high strength and high modulus polyethylene fiber are used, and its contact coolness Qmax is 0.51W / cm2, the fiber breaking strength is 18cN / dtex, the elastic modulus is 700cN / dtex, the breaking elongation is 4.8%, and the fiber characteristic viscosity is 5.4dl / g. 5 parts of PTT fiber are used, and the two are blended to make fabrics. Take a certain amount of (2,3)-epoxypropyltrimethoxysilane, phytic acid, and ethanol, and react them at 70 ℃; then take a certain amount of methyltriethoxysilane, ethyl orthosilicate, deionized water, and ethanol and add them to the above reaction system, and heat to 80 ℃ to obtain a phosphorus-containing siloxane coating after the reaction is completed. The high cool feeling high strength and high modulus polyethylene fiber and elastic fiber blended fabric is treated in an alkaline solution at 60 ℃ for 20 minutes. The above fabric is immersed in the siloxane coating, washed with water, and then the fabric is dried. The fabric is immersed in a phytic acid solution, and then the excess phytic acid is washed off with a mixed solution of deionized water and isopropyl alcohol, and the fabric is dried. The fabric is immersed in a silicone coating, and after washing, the fabric is dried to obtain a finished fabric.

[0053] The fabric obtained in Example 1 was tested for fabric properties, and the fabric had good flame retardancy and abrasion resistance, a cool feeling, a high fabric thickness, and good elasticity and touch. The results are shown in Table 1.

[0054] Example 2

[0055] According to the total of 10 parts, 2 parts of high-cooling high-strength high-modulus polyethylene fiber and 8 parts of PTT fiber are used, and the remaining parts are made according to the process and method of Example 1 to obtain a finished fabric.

[0056] The fabric obtained in Example 2 was tested for fabric properties, and the fabric had good flame retardancy and abrasion resistance, a cool feeling, a high fabric thickness, and good elasticity and touch. The results are shown in Table 1.

[0057] Example 3

[0058] According to the total of 10 parts, 8 parts of high-cooling high-strength high-modulus polyethylene fiber and 2 parts of PTT fiber are used, and the remaining parts are made according to the process and method of Example 1 to obtain a finished fabric.

[0059] The fabric obtained in Example 3 was tested for its properties, and found to have good flame retardancy and abrasion resistance, a cool feel, a high thickness, and good elasticity and touch. The results are shown in Table 1.

[0060] Example 4

[0061] According to the total of 10 parts, 5 parts of high-cooling high-strength high-modulus polyethylene fiber and 5 parts of PTT / PET fiber are used, and the remaining parts are made according to the process and method of Example 1 to obtain a finished fabric.

[0062] The fabric obtained in Example 4 was tested for fabric properties, and the fabric had good flame retardancy and abrasion resistance, a cool feeling, a high thickness, and good elasticity and touch. The results are shown in Table 1.

[0063] Example 5

[0064] According to the total of 10 parts, 5 parts of high-cooling high-strength high-modulus polyethylene fiber and 5 parts of PBT / PET fiber are used, and the remaining parts are made according to the process and method of Example 1 to obtain a finished fabric.

[0065] The fabric obtained in Example 5 was tested for its properties, and found to have good flame retardancy and abrasion resistance, a cool feel, a high thickness, and good elasticity and touch. The results are shown in Table 1.

[0066] Comparative Example 1

[0067] According to the total of 10 parts, 1 part of high-cooling high-strength high-modulus polyethylene fiber and 9 parts of PTT fiber are used, and the remaining parts are made according to the process and method of Example 1 to obtain a finished fabric.

[0068] The fabric obtained in Comparative Example 1 was tested for fabric properties. Although it had good flame retardancy and fabric touch, its wear resistance and cool feeling were poor. The results are shown in Table 2.

[0069] Comparative Example 2

[0070] According to the total of 10 parts, 9 parts of high-cooling high-strength high-modulus polyethylene fiber and 1 part of PTT fiber are used, and the remaining parts are made according to the process and method of Example 1 to obtain a finished fabric.

[0071] The fabric obtained in Comparative Example 2 was tested for fabric properties. Although it had good flame retardancy and abrasion resistance and a cool feel, its touch and elasticity were poor. The results are shown in Table 2.

[0072] Comparative Example 3

[0073] According to the total of 10 parts, 5 parts of ordinary polyethylene fiber and 5 parts of PTT fiber were used, and the remaining parts were made according to the process and method of Example 1 to obtain a finished fabric.

[0074] The fabric obtained in Comparative Example 3 was tested for fabric properties. Although it had good flame retardancy and fabric touch, its wear resistance and cool feeling were poor. The results are shown in Table 2.

[0075] Comparative Example 4

[0076] According to the total of 10 parts, 5 parts of high-cooling high-strength high-modulus polyethylene fiber and 5 parts of ordinary PET fiber are used, and the remaining parts are made according to the process and method of Example 1 to obtain a finished fabric.

[0077] The fabric obtained in Comparative Example 4 was tested for fabric properties. Although it had good flame retardancy and abrasion resistance and a cool feel, its touch and elasticity were poor. The results are shown in Table 2.

[0078] Comparative Example 5

[0079] The coating flame retardant used was polysiloxane, and the other steps were carried out according to the process and method of Example 1 to obtain the finished fabric.

[0080] The fabric obtained in Comparative Example 5 was tested for fabric properties. Although it had good fabric touch and wear resistance and a cool feel, its flame retardancy was poor.

[0081] Comparative Example 6

[0082] The coating flame retardant used was phytic acid, and the finished fabric was prepared according to the process and method of Example 1.

[0083] The fabric obtained in Comparative Example 6 was tested for fabric properties. Although it had good fabric touch and wear resistance and a cool feel, its flame retardancy was poor.

Claims

1. A method for preparing a flame-retardant, highly wear-resistant elastic automobile seat cushion, characterized in that: The surface layer of the flame-retardant, highly wear-resistant and elastic car seat cushion is prepared by treating a blended fabric with a flame-retardant coating, wherein the blended fabric is obtained by blending high-cooling, high-strength and high-modulus polyethylene fibers and elastic fibers; wherein the flame-retardant coating treatment process is as follows: A certain amount of (2,3)-epoxypropyltrimethoxysilane, phytic acid, and ethanol are taken and reacted at 60-80°C; then a certain amount of methyltriethoxysilane, ethyl orthosilicate, deionized water, and ethanol are added to the above reaction system, and the temperature is raised to 80-100°C to obtain a phosphorus-containing siloxane coating after the reaction is completed; The blended fabric of high-cooling high-strength high-modulus polyethylene fiber and elastic fiber is treated in an alkaline solution at 50-70°C for 10-30 minutes; The fabric is immersed in the silicone coating, washed with water and then dried; The fabric is immersed in a phytic acid solution, and then the excess phytic acid is washed off with a mixed solution of deionized water and isopropyl alcohol, and the fabric is dried; The fabric is immersed in the silicone coating, washed with water, and then dried to obtain a finished fabric; The high-cooling high-strength high-modulus polyethylene fiber has a contact coolness Qmax of 0.4 W / cm 2 The fiber has a breaking strength of 10 cN / dtex or more, an elastic modulus of 400 cN / dtex or more, and an elongation at break of 6% or less; the fiber characteristic viscosity is 1.5 to 10 dl; the elastic fiber is one of PTT fiber, PTT / PET parallel fiber, and PBT / PET parallel fiber; the blending ratio of the high-cooling high-strength and high-modulus polyethylene fiber and the elastic fiber is 2:8 to 8:

2.

2. The method for preparing the flame-retardant and highly wear-resistant elastic automobile seat cushion according to claim 1, characterized in that: A high molecular weight polyethylene raw material with an intrinsic viscosity of 3.5-10dl / g and a weight average molecular weight to number average molecular weight ratio (Mw / Mn) of 5-10 is melt-conveyed by a low-shear, high-conveyance screw extruder, and then enters a spinning assembly with a combined spinneret; the combined spinneret, which can orient the polyethylene melt macromolecules and release the elastic potential energy of the melt, is used to extrude filaments to obtain spun fibers; and the spun fibers are subjected to multi-stage stretching and heat setting to obtain the high-cooling, high-strength and high-modulus polyethylene fibers.

3. A flame retardant and highly wear-resistant elastic car seat cushion, characterized by: Prepared by the preparation method described in claim 1 or claim 2.

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