PVC calender method pigment color powder, automobile interior material, preparation method thereof and automobile

Abstract

This application discloses a pigment powder for PVC calendering, automotive interior materials, their preparation methods, and an automobile, relating to the automotive field. The pigment powder for PVC calendering comprises organic pigment powder. By including organic pigment powder in the raw material composition, the defect of inconsistent color difference at various angles of inorganic pigment crystals can be overcome, resulting in uniform color difference at various angles of the pigment powder, reducing the angle-dependent color variation of the material, and improving the problem of longitudinal and transverse color difference.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to a pigment powder for PVC calendering, automotive interior materials, their preparation methods, and automobiles. Background Technology

[0002] As consumer demands diversify, the use of color in automotive interior and exterior trims is becoming increasingly diverse. However, during the PVC material manufacturing process, issues frequently arise where there is color variation across the entire interior, such as uneven coloring between headrests and seatbacks, door panels and dashboard trim, and other mismatched colors. This negatively impacts the consumer experience. Summary of the Invention

[0003] This application provides a pigment powder for PVC calendering, an automotive interior material, a preparation method thereof, and an automobile, to solve the problem of color difference along the corners and the existence of longitudinal and transverse color differences in existing automotive interior materials.

[0004] In one aspect, this application provides a pigment powder for PVC calendering, the raw material composition of which includes organic pigment powder.

[0005] The main reason for the angle-dependent color variation is that inorganic pigments contain metallic flake pigments or metal oxides coated on the surface of various material substrates. When the viewing angle changes, the reflection and interference of light are different, resulting in color changes when the angle changes.

[0006] In this application, by including organic pigments in the raw material composition, the defect of inconsistent color difference at various angles of inorganic pigment crystals can be overcome, so that the color difference of pigments at various angles is uniform, reducing the color difference of materials at different angles and improving the problem of longitudinal and transverse color difference.

[0007] Organic pigments are typically added to substrates in a highly dispersed state, which helps reduce reflection and interference of light at different angles, thereby reducing angle-dependent color variation. Organic pigments also possess specific absorption spectra, absorbing light of specific wavelengths rather than reflecting or transmitting it, further reducing the likelihood of angle-dependent color variation. Furthermore, the tiny particles of organic pigments can scatter incident light, helping to eliminate light from specific directions and minimizing angle-dependent color variation.

[0008] In some embodiments, the pigment powder used in the PVC calendering process comprises white powder, nickel titanium yellow powder, phthalocyanine red powder, and black powder. Phthalocyanine red powder is an organic pigment powder. Using the above-mentioned raw material composition can reduce the longitudinal and transverse color differences in white interior trim and improve the uniformity of material color.

[0009] In some embodiments, the pigment powder for PVC calendering, by weight, comprises: 56-85 parts white powder, 4-7 parts nickel titanium yellow powder, 0.5-2.5 parts phthalocyanine red powder, and 0.3-0.8 parts black powder. Phthalocyanine red powder is an organic pigment powder. Using the above-mentioned weight proportions of raw materials can reduce the longitudinal and transverse color differences in white interior trim and improve the uniformity of material color.

[0010] In some embodiments, the pigment powder used in the PVC calendering process comprises white powder, iron oxide red powder, 254 red powder, PY110 yellow powder, cobalt blue powder, and black powder. Both 254 red powder and the other powder are organic pigments. Using the above-mentioned raw material composition can reduce the longitudinal and transverse color differences in brown interior trim and improve the uniformity of material color.

[0011] In some embodiments, the pigment powder used in the PVC calendering process, by weight, comprises: 14-22 parts white powder, 2-6 parts iron oxide red powder, 0.5-2.5 parts 254 red powder, 3-6 parts PY110 yellow powder, 0.05-0.25 parts cobalt blue powder, and 2.3-5.4 parts black powder. Both 254 red powder and PY110 yellow powder are organic pigment powders. Using the above-mentioned weight proportions of raw materials can reduce the longitudinal and transverse color differences in brown interior trim and improve the uniformity of material color.

[0012] Secondly, this application provides an automotive interior material, comprising a base fabric layer, a PVC foam layer, and a PVC surface layer arranged sequentially from bottom to top, wherein the materials of the PVC foam layer and the PVC surface layer include the pigment powder used in the PVC calendering process described in the first aspect.

[0013] Normally, color powder is only used on the PVC surface layer, and the PVC foam layer is not dyed. In order to further improve the color difference uniformity, this application also uses color powder to dye the PVC foam layer, which further improves the color difference uniformity, reduces the color difference of the color powder at different angles, and reduces the longitudinal and transverse color difference.

[0014] Thirdly, this application provides a method for preparing automotive interior materials, comprising the following steps:

[0015] Pigment powder, PVC, plasticizer, stabilizer and filler are mixed to obtain PVC foam layer mixture liquid;

[0016] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0017] Pigment powder, PVC, plasticizer, stabilizer and filler are mixed to obtain PVC surface layer mixture liquid;

[0018] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0019] In some embodiments, the mixing of pigment powder, PVC, plasticizer, stabilizer, and filler to obtain a PVC foam layer mixture is carried out at a temperature of 130–150°C. This temperature range improves the uniformity of pigment powder dispersion and color difference uniformity; and / or,

[0020] The process of mixing pigment powder, PVC, plasticizer, stabilizer, and filler to obtain a PVC foam layer mixture involves a mixing time of 150–250 seconds. Within this range, the uniformity of pigment powder dispersion and color difference uniformity can be improved; and / or,

[0021] In the process of mixing pigment powder, PVC, plasticizer, stabilizer, and filler to obtain a PVC surface layer mixture, the mixing temperature is 135–145°C. Within this temperature range, the uniformity of pigment powder dispersion and color difference uniformity can be improved; and / or,

[0022] The process involves mixing pigment powder, PVC, plasticizer, stabilizer, and filler to obtain a PVC surface layer mixture liquid. The mixing time is 200-300 seconds. Within this range, the uniformity of pigment powder dispersion and color difference can be improved.

[0023] It should be noted that in the PVC foaming layer mixture, the mass ratio of pigment powder, PVC, plasticizer, stabilizer, foaming agent and filler can be (0.3~0.5):(95~98):(40~45):(6~8):(1~10):(20~30). The plasticizer can be di(2-propylheptyl) phthalate or diisophthalate. The stabilizer can be calcium zinc or barium zinc. The foaming agent can be azodicarbonamide. The filler can be calcium carbonate, calcium sulfate, etc.

[0024] The mass ratio of pigment powder, PVC, plasticizer, stabilizer and filler in the PVC surface layer mixture can be (0.3~0.5):(98~100):(40~45):(6~8):(20~25). The plasticizer can be di(2-propylheptyl) phthalate or diisophthalate. The stabilizer can be calcium zinc or barium zinc. The filler can be calcium carbonate, calcium sulfate, etc.

[0025] In some embodiments, the PVC foaming layer mixture is foamed on a base fabric layer to form a PVC foaming layer. The molding method includes four-roller shearing plasticizing, wherein: the temperature of the first-stage roller is 170–180°C, and the rotation speed is 17–27 m / min; the temperature of the second-stage roller is 170–180°C, and the rotation speed is 27–37 m / min; the temperature of the third-stage roller is 160–170°C, and the rotation speed is 36–46 m / min; the temperature of the fourth-stage roller is 150–160°C, and the rotation speed is 40–50 m / min; and / or,

[0026] The process of hydraulically calendering a PVC surface layer mixture onto a PVC foam layer to form a PVC surface layer, resulting in automotive interior materials, involves calendering using a four-roller shearing plasticizing method. Specifically: the temperature of the first-stage roller is 180–190°C, and its rotation speed is 12–22 m / min; the temperature of the second-stage roller is 180–190°C, and its rotation speed is 21–31 m / min; the temperature of the third-stage roller is 175–185°C, and its rotation speed is 28–38 m / min; and the temperature of the fourth-stage roller is 170–180°C, and its rotation speed is 32–42 m / min.

[0027] In calendering, another major reason for the corner-specific color difference in pigments is that the tension in the axial and circumferential directions differs during calendering. This causes the pigment raw materials to be neatly arranged in one direction. In other words, under pressure during calendering, the pigments become directional, and the gaps between the pigments and the ion arrangement become too neat, thus exacerbating the corner-specific color difference. By controlling the temperature and speed of each calendering roller, the tension difference between the axial and circumferential directions can be reduced, preventing the axial pressure from becoming too uniform and reducing the probability of the pigments arranging in the same direction. This, in turn, reduces the probability of corner-specific color difference and minimizes longitudinal and transverse color variations.

[0028] Fourthly, this application proposes an automobile, including the automobile interior material of the second aspect. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] As consumer demands diversify, the use of color in automotive interior and exterior trims is becoming increasingly diverse. However, during the PVC material manufacturing process, issues such as longitudinal and transverse color differences (color variations along corners) are frequently observed. Even when the same roll of PVC has a very uniform color on the surface, when covering the entire vehicle interior, inconsistencies can arise when opening the doors, such as differences between the headrest and seatback colors, door panels and dashboard trim, and seatback colors, negatively impacting the consumer experience. Adding color-compatibility additives can address these issues, but the production of these additives is complex, increasing equipment and labor costs. Furthermore, fixing the proportions of the color powder results in unadjustable colors and a narrow range of applications.

[0031] In view of this, this application provides a pigment powder for PVC calendering, an automotive interior material, a method for preparing the same, and an automobile, to solve the problem of color difference in existing automotive interiors due to variations in color at different angles, resulting in longitudinal and transverse color differences.

[0032] In one aspect, this application provides a pigment powder for PVC calendering, the raw material composition of which includes organic pigment powder.

[0033] The main reason for the angle-dependent color variation is that inorganic pigments contain metallic flake pigments or metal oxides coated on the surface of various material substrates. When the viewing angle changes, the reflection and interference of light are different, resulting in color changes when the angle changes.

[0034] In this application, by including organic pigments in the raw material composition, the defect of inconsistent color difference at various angles of inorganic pigment crystals can be overcome, so that the color difference of pigments at various angles is uniform, reducing the color difference of materials at different angles and improving the problem of longitudinal and transverse color difference.

[0035] Organic pigments are typically added to substrates in a highly dispersed state, which helps reduce reflection and interference of light at different angles, thereby reducing angle-dependent color variation. Organic pigments also possess specific absorption spectra, absorbing light of specific wavelengths rather than reflecting or transmitting it, further reducing the likelihood of angle-dependent color variation. Furthermore, the tiny particles of organic pigments can scatter incident light, helping to eliminate light from specific directions and minimizing angle-dependent color variation.

[0036] In conjunction with the first aspect, in some embodiments provided in this application, the pigment powder used in the PVC calendering process comprises white powder, nickel titanium yellow powder, phthalocyanine red powder, and black powder. Phthalocyanine red powder is an organic pigment powder. Using the above-mentioned raw material composition can reduce the longitudinal and transverse color differences in white interior trim and improve the uniformity of material color differences.

[0037] In conjunction with the first aspect, in some embodiments provided in this application, the pigment powder for PVC calendering, by weight, comprises: 56-85 parts white powder, 4-7 parts nickel-titanium yellow powder, 0.5-2.5 parts phthalocyanine red powder, and 0.3-0.8 parts black powder. Phthalocyanine red powder is an organic pigment powder. Using the above-mentioned weight proportions of raw materials can reduce the longitudinal and transverse color differences in white interior trim and improve the uniformity of material color differences.

[0038] In conjunction with the first aspect, in some embodiments provided in this application, the pigment powder used in the PVC calendering process comprises white powder, iron oxide red powder, 254 red powder, PY110 yellow powder, cobalt blue powder, and black powder. 254 red powder and PY110 yellow powder are both organic pigment powders. Using the above-mentioned raw material composition can reduce the longitudinal and transverse color differences in brown interior trim and improve the uniformity of material color differences.

[0039] In conjunction with the first aspect, in some embodiments provided in this application, the pigment powder used in the PVC calendering process, by weight, comprises: 14-22 parts white powder, 2-6 parts iron oxide red powder, 0.5-2.5 parts 254 red powder, 3-6 parts PY110 yellow powder, 0.05-0.25 parts cobalt blue powder, and 2.3-5.4 parts black powder. Both 254 red powder and PY110 yellow powder are organic pigment powders. Using the above-mentioned weight proportions of raw materials can reduce the longitudinal and transverse color differences in brown interior trim and improve the uniformity of material color differences.

[0040] Secondly, this application provides an automotive interior material, comprising a base fabric layer, a PVC foam layer, and a PVC surface layer arranged sequentially from bottom to top, wherein the materials of the PVC foam layer and the PVC surface layer include the pigment powder used in the PVC calendering process described in the first aspect.

[0041] Typically, only the PVC surface layer is dyed, while the PVC foam layer is not dyed. This improves the color fidelity, ensuring that even when the PVC surface layer is worn or its pores become larger due to environmental factors, the PVC foam layer can still effectively avoid color differences and maintain consistency with the surface layer color.

[0042] Thirdly, this application provides a method for preparing automotive interior materials, comprising the following steps:

[0043] Pigment powder, PVC, plasticizer, stabilizer and filler are mixed to obtain PVC foam layer mixture liquid;

[0044] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0045] Pigment powder, PVC, plasticizer, stabilizer and filler are mixed to obtain PVC surface layer mixture liquid;

[0046] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0047] In conjunction with the third aspect, in some embodiments provided in this application, the mixing temperature of pigment powder, PVC, plasticizer, stabilizer and filler to obtain PVC foam layer mixture is 130-150°C. The mixing temperature within this range can improve the uniformity of pigment powder dispersion and improve the uniformity of color difference.

[0048] In conjunction with the third aspect, in some embodiments provided in this application, the mixing of pigment powder, PVC, plasticizer, stabilizer and filler to obtain PVC foam layer mixture liquid: the mixing time is 150 to 250 seconds. The mixing time within this range can improve the uniformity of pigment powder dispersion and improve the uniformity of color difference.

[0049] In conjunction with the third aspect, in some embodiments provided in this application, the mixing temperature of pigment powder, PVC, plasticizer, stabilizer and filler material to obtain PVC surface layer mixture liquid is 135-145°C. The mixing temperature within this range can improve the uniformity of pigment powder dispersion and improve the uniformity of color difference.

[0050] In conjunction with the third aspect, in some embodiments provided in this application, the mixing of pigment powder, PVC, plasticizer, stabilizer and filler materials to obtain PVC surface layer mixture liquid: the mixing time is 200-300s. The mixing time within this range can improve the uniformity of pigment powder dispersion and improve the uniformity of color difference.

[0051] It should be noted that in the PVC foaming layer mixture, the mass ratio of pigment powder, PVC, plasticizer, stabilizer, foaming agent and filler can be (0.3~0.5):(95~98):(40~45):(6~8):(1~10):(20~30). The plasticizer can be di(2-propylheptyl) phthalate or diisophthalate. The stabilizer can be calcium zinc or barium zinc. The foaming agent can be azodicarbonamide. The filler can be calcium carbonate, calcium sulfate, etc.

[0052] The mass ratio of pigment powder, PVC, plasticizer, stabilizer and filler in the PVC surface layer mixture can be (0.3~0.5):(98~100):(40~45):(6~8):(20~25). The plasticizer can be di(2-propylheptyl) phthalate or diisophthalate. The stabilizer can be calcium zinc or barium zinc. The filler can be calcium carbonate, calcium sulfate, etc.

[0053] In conjunction with the third aspect, in some embodiments provided in this application, the PVC foaming layer mixture is foamed and molded on a base fabric layer to form a PVC foaming layer. The molding method includes four-roller pressing and shearing plasticizing, wherein: the temperature of the first-stage roller is 170-180℃, and the rotation speed of the first-stage roller is 17-27 m / min; the temperature of the second-stage roller is 170-180℃, and the rotation speed of the second-stage roller is 27-37 m / min; the temperature of the third-stage roller is 160-170℃, and the rotation speed of the third-stage roller is 36-46 m / min; the temperature of the fourth-stage roller is 150-160℃, and the rotation speed of the fourth-stage roller is 40-50 m / min.

[0054] In conjunction with the third aspect, in some embodiments provided in this application, the method of calendering the PVC surface layer mixture onto the PVC foam layer to form a PVC surface layer and obtain automotive interior materials includes four-roller shearing plasticizing, wherein: the temperature of the first-stage roller is 180-190℃, and the rotation speed of the first-stage roller is 12-22 m / min; the temperature of the second-stage roller is 180-190℃, and the rotation speed of the second-stage roller is 21-31 m / min; the temperature of the third-stage roller is 175-185℃, and the rotation speed of the third-stage roller is 28-38 m / min; the temperature of the fourth-stage roller is 170-180℃, and the rotation speed of the fourth-stage roller is 32-42 m / min.

[0055] In calendering, another major reason for the corner-specific color difference in pigments is that the tension in the axial and circumferential directions differs during calendering. This causes the pigment raw materials to be neatly arranged in one direction. In other words, under pressure during calendering, the pigments become directional, and the gaps between the pigments and the ion arrangement become too neat, thus exacerbating the corner-specific color difference. By controlling the temperature and speed of each calendering roller, the tension difference between the axial and circumferential directions can be reduced, preventing the axial pressure from becoming too uniform and reducing the probability of the pigments arranging in the same direction. This, in turn, reduces the probability of corner-specific color difference and minimizes longitudinal and transverse color variations.

[0056] Fourthly, this application proposes an automobile, including the automotive interior material of the second aspect. The automobile possesses all the technical solutions of the pigment powder used in the PVC calendering process, and therefore has all the beneficial effects of the pigment powder used in the PVC calendering process, which will not be elaborated upon here.

[0057] The technical solution provided in this application will be described in detail below with reference to the embodiments. Among them, the nickel titanium yellow powder, model PY24, was purchased from Guangzhou Juli Pigment Co., Ltd.; the phthalocyanine red powder, model PV19, was purchased from Guangzhou Juli Pigment Co., Ltd.; the white powder, model PW6, was purchased from Guangzhou Huihecai Pigment Co., Ltd.; the black powder, model PK7, was purchased from Guangzhou Huihecai Pigment Co., Ltd.; the iron oxide red powder, model PR101, was purchased from Guangzhou Juli Pigment Co., Ltd.; the iron oxide yellow powder, model PY42, was purchased from Guangzhou Huihecai Pigment Co., Ltd.; the advanced brilliant red, model PR-254, was purchased from Guangzhou Juli Pigment Co., Ltd.; the advanced deep yellow, model P.Y110, was purchased from Guangzhou Juli Pigment Co., Ltd.; and the cobalt blue, model PB28, was purchased from Guangzhou Huihecai Pigment Co., Ltd.

[0058] Example 1

[0059] Embodiment 1 of this application provides a pigment powder for PVC calendering, which, by mass parts, comprises: 56 parts white powder, 4 parts nickel titanium yellow powder, 0.5 parts phthalo red powder, and 0.3 parts black powder.

[0060] Example 2

[0061] Embodiment 2 of this application provides a pigment powder for PVC calendering, which, by mass parts, comprises: 85 parts white powder, 7 parts nickel titanium yellow powder, 2.5 parts phthalo red powder, and 0.8 parts black powder.

[0062] Example 3

[0063] Embodiment 3 of this application provides a pigment powder for PVC calendering, which, by mass parts, comprises: 65 parts white powder, 5 parts nickel titanium yellow powder, 1.5 parts phthalo red powder, and 0.5 parts black powder.

[0064] Example 4

[0065] Embodiment 4 of this application provides a pigment powder for PVC calendering, which, by mass parts, comprises: 50 parts white powder, 3 parts nickel titanium yellow powder, 0.2 parts phthalo red powder, and 0.1 parts black powder.

[0066] Example 5

[0067] Embodiment 5 of this application provides a pigment powder for PVC calendering, which, by mass parts, comprises: 90 parts white powder, 8 parts nickel titanium yellow powder, 5 parts phthalo red powder, and 1.0 part black powder.

[0068] Example 6

[0069] Embodiment 6 of this application provides a pigment powder for PVC calendering, which, by mass parts, comprises: 14 parts white powder, 2 parts iron oxide red powder, 0.5 parts 254 red powder, 3 parts PY110 yellow powder, 0.05 parts cobalt blue powder, and 2.3 parts black powder.

[0070] Example 7

[0071] Embodiment 7 of this application provides a pigment powder for PVC calendering, which, by mass parts, comprises: 22 parts white powder, 6 parts iron oxide red powder, 2.5 parts 254 red powder, 6 parts PY110 yellow powder, 0.25 parts cobalt blue powder, and 5.4 parts black powder.

[0072] Example 8

[0073] Embodiment 8 of this application provides a pigment powder for PVC calendering, which, by mass parts, comprises: 18 parts white powder, 5.0 parts iron oxide red powder, 1.5 parts 254 red powder, 5 parts PY110 yellow powder, 0.1 parts cobalt blue powder, and 4.0 parts black powder.

[0074] Example 9

[0075] Embodiment 9 of this application provides a method for preparing automotive interior materials, including the following steps:

[0076] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc), foaming agent (azodicarbonamide) and filler (calcium carbonate) of Example 1 were mixed at 130°C for 250s in a mass ratio of 4:40:24:6:6:20 to obtain a PVC foaming layer mixture.

[0077] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0078] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc) and filler (calcium carbonate) of Example 1 were mixed at 135°C for 300s in a mass ratio of 5:40:25:5:25 to obtain PVC surface layer mixture liquid.

[0079] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0080] The PVC foam layer is plasticized using a four-roller shearing process, with the following roller temperatures: the first roller has a temperature of 170℃ and a rotation speed of 17 m / min; the second roller has a temperature of 170℃ and a rotation speed of 27 m / min; the third roller has a temperature of 160℃ and a rotation speed of 36 m / min; and the fourth roller has a temperature of 150℃ and a rotation speed of 40 m / min.

[0081] The PVC surface layer is plasticized by four-roller shearing, wherein: the temperature of the first roller is 180℃ and the rotation speed of the first roller is 12m / min; the temperature of the second roller is 180℃ and the rotation speed of the second roller is 21m / min; the temperature of the third roller is 175℃ and the rotation speed of the third roller is 28m / min; and the temperature of the fourth roller is 170℃ and the rotation speed of the fourth roller is 32m / min.

[0082] Example 10

[0083] Example 10 of this application provides a method for preparing automotive interior materials, including the following steps:

[0084] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc), foaming agent (azodicarbonamide) and filler (calcium carbonate) of Example 2 were mixed at 150°C for 150s in a mass ratio of 4:40:24:6:6:20 to obtain a PVC foaming layer mixture.

[0085] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0086] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc) and filler (calcium carbonate) of Example 2 were mixed at 145°C for 200s in a mass ratio of 5:40:25:5:25 to obtain PVC surface layer mixture liquid.

[0087] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0088] The PVC foam layer is plasticized using a four-roller shearing process, with the following roller temperatures: the first roller has a temperature of 180℃ and a rotation speed of 27 m / min; the second roller has a temperature of 180℃ and a rotation speed of 37 m / min; the third roller has a temperature of 170℃ and a rotation speed of 46 m / min; and the fourth roller has a temperature of 160℃ and a rotation speed of 50 m / min.

[0089] The PVC surface layer is plasticized by four-roller shearing, wherein: the temperature of the first-stage roller is 190℃ and the rotation speed of the first-stage roller is 22m / min; the temperature of the second-stage roller is 190℃ and the rotation speed of the second-stage roller is 31m / min; the temperature of the third-stage roller is 185℃ and the rotation speed of the third-stage roller is 38m / min; and the temperature of the fourth-stage roller is 180℃ and the rotation speed of the fourth-stage roller is 42m / min.

[0090] Example 11

[0091] Embodiment 11 of this application provides a method for preparing automotive interior materials, including the following steps:

[0092] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc), foaming agent (azodicarbonamide) and filler (calcium carbonate) of Example 3 were mixed at 140°C for 200s in a mass ratio of 4:40:24:6:6:20 to obtain a PVC foaming layer mixture.

[0093] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0094] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc) and filler (calcium carbonate) of Example 3 were mixed at 140°C for 250s in a mass ratio of 5:40:25:5:25 to obtain PVC surface layer mixture liquid.

[0095] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0096] The PVC foam layer is plasticized using a four-roller shearing process, with the following roller temperatures: 175℃ for the first roller and a rotation speed of 22 m / min; 175℃ for the second roller and a rotation speed of 32 m / min; 165℃ for the third roller and a rotation speed of 42 m / min; and 155℃ for the fourth roller and a rotation speed of 45 m / min.

[0097] The PVC surface layer is plasticized by four-roller shearing, wherein: the temperature of the first roller is 185℃ and the rotation speed of the first roller is 17m / min; the temperature of the second roller is 185℃ and the rotation speed of the second roller is 26m / min; the temperature of the third roller is 180℃ and the rotation speed of the third roller is 33m / min; and the temperature of the fourth roller is 175℃ and the rotation speed of the fourth roller is 37m / min.

[0098] Example 12

[0099] Example 12 of this application provides a method for preparing automotive interior materials, including the following steps:

[0100] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc), foaming agent (azodicarbonamide) and filler (calcium carbonate) of Example 4 were mixed at 140°C for 200s in a mass ratio of 4:40:24:6:6:20 to obtain a PVC foaming layer mixture.

[0101] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0102] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc) and filler (calcium carbonate) of Example 4 were mixed at 140°C for 250s in a mass ratio of 5:40:25:5:25 to obtain PVC surface layer mixture liquid.

[0103] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0104] The PVC foam layer is plasticized using a four-roller shearing process, with the following roller temperatures: 175℃ for the first roller and a rotation speed of 22 m / min; 175℃ for the second roller and a rotation speed of 32 m / min; 165℃ for the third roller and a rotation speed of 42 m / min; and 155℃ for the fourth roller and a rotation speed of 45 m / min.

[0105] The PVC surface layer is plasticized by four-roller shearing, wherein: the temperature of the first roller is 185℃ and the rotation speed of the first roller is 17m / min; the temperature of the second roller is 185℃ and the rotation speed of the second roller is 26m / min; the temperature of the third roller is 180℃ and the rotation speed of the third roller is 33m / min; and the temperature of the fourth roller is 175℃ and the rotation speed of the fourth roller is 37m / min.

[0106] Example 13

[0107] Embodiment 13 of this application provides a method for preparing automotive interior materials, including the following steps:

[0108] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc), foaming agent (azodicarbonamide) and filler (calcium carbonate) of Example 5 were mixed at 135°C for 200s in a mass ratio of 4:40:24:6:6:20 to obtain a PVC foaming layer mixture.

[0109] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0110] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc) and filler (calcium carbonate) of Example 5 were mixed at 140°C for 250s in a mass ratio of 5:40:25:5:25 to obtain PVC surface layer mixture liquid.

[0111] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0112] The PVC foam layer is plasticized using a four-roller shearing process, with the following roller temperatures: 175℃ for the first roller and a rotation speed of 22 m / min; 175℃ for the second roller and a rotation speed of 32 m / min; 165℃ for the third roller and a rotation speed of 42 m / min; and 155℃ for the fourth roller and a rotation speed of 45 m / min.

[0113] The PVC surface layer is plasticized by four-roller shearing, wherein: the temperature of the first roller is 185℃ and the rotation speed of the first roller is 17m / min; the temperature of the second roller is 185℃ and the rotation speed of the second roller is 26m / min; the temperature of the third roller is 180℃ and the rotation speed of the third roller is 33m / min; and the temperature of the fourth roller is 175℃ and the rotation speed of the fourth roller is 37m / min.

[0114] Example 14

[0115] Embodiment 14 of this application provides a method for preparing automotive interior materials, including the following steps:

[0116] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc), foaming agent (azodicarbonamide) and filler (calcium carbonate) of Example 8 were mixed at 130°C for 250s in a mass ratio of 4:40:24:6:6:20 to obtain a PVC foaming layer mixture.

[0117] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0118] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc) and filler (calcium carbonate) of Example 8 were mixed at 135°C for 300s in a mass ratio of 5:40:25:5:25 to obtain PVC surface layer mixture liquid.

[0119] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0120] The PVC foam layer is plasticized using a four-roller shearing process, with the following roller temperatures: 175℃ for the first roller and a rotation speed of 22 m / min; 175℃ for the second roller and a rotation speed of 32 m / min; 165℃ for the third roller and a rotation speed of 42 m / min; and 155℃ for the fourth roller and a rotation speed of 45 m / min.

[0121] The PVC surface layer is plasticized by four-roller shearing, wherein: the temperature of the first roller is 185℃ and the rotation speed of the first roller is 17m / min; the temperature of the second roller is 185℃ and the rotation speed of the second roller is 26m / min; the temperature of the third roller is 180℃ and the rotation speed of the third roller is 33m / min; and the temperature of the fourth roller is 175℃ and the rotation speed of the fourth roller is 37m / min.

[0122] Example 15

[0123] Embodiment 15 of this application provides a method for preparing automotive interior materials, including the following steps:

[0124] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc), foaming agent (azodicarbonamide) and filler (calcium carbonate) of Example 3 were mixed at 120°C for 400s in a mass ratio of 4:40:24:6:6:20 to obtain a PVC foaming layer mixture.

[0125] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0126] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc) and filler (calcium carbonate) of Example 3 were mixed at 130°C for 400s in a mass ratio of 5:40:25:5:25 to obtain PVC surface layer mixture liquid.

[0127] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0128] The PVC foam layer is plasticized using a four-roller shearing process, with the following roller temperatures: the first roller has a temperature of 160℃ and a rotation speed of 30m / min; the second roller has a temperature of 160℃ and a rotation speed of 40m / min; the third roller has a temperature of 150℃ and a rotation speed of 50m / min; and the fourth roller has a temperature of 140℃ and a rotation speed of 60m / min.

[0129] The PVC surface layer is plasticized by four-roller shearing, wherein: the temperature of the first roller is 170℃ and the rotation speed of the first roller is 25m / min; the temperature of the second roller is 170℃ and the rotation speed of the second roller is 36m / min; the temperature of the third roller is 160℃ and the rotation speed of the third roller is 43m / min; and the temperature of the fourth roller is 160℃ and the rotation speed of the fourth roller is 47m / min.

[0130] Example 16

[0131] Embodiment 16 of this application provides a method for preparing automotive interior materials, including the following steps:

[0132] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc), foaming agent (azodicarbonamide) and filler (calcium carbonate) of Example 3 were mixed at 160°C for 100s in a mass ratio of 4:40:24:6:6:20 to obtain a PVC foaming layer mixture.

[0133] The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer;

[0134] The pigment powder, PVC, plasticizer (di(2-propylheptyl) phthalate), stabilizer (calcium zinc) and filler (calcium carbonate) of Example 3 were mixed at 150°C for 150s in a mass ratio of 5:40:25:5:25 to obtain PVC surface layer mixture liquid.

[0135] A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

[0136] The PVC foam layer is plasticized using a four-roller shearing process, with the following roller temperatures: the first roller has a temperature of 190℃ and a rotation speed of 12m / min; the second roller has a temperature of 190℃ and a rotation speed of 22m / min; the third roller has a temperature of 180℃ and a rotation speed of 32m / min; and the fourth roller has a temperature of 170℃ and a rotation speed of 35m / min.

[0137] The PVC surface layer is plasticized by four-roller shearing, wherein: the temperature of the first-stage roller is 200℃ and the rotation speed of the first-stage roller is 7m / min; the temperature of the second-stage roller is 200℃ and the rotation speed of the second-stage roller is 16m / min; the temperature of the third-stage roller is 190℃ and the rotation speed of the third-stage roller is 23m / min; and the temperature of the fourth-stage roller is 190℃ and the rotation speed of the fourth-stage roller is 27m / min.

[0138] Comparative Example 1

[0139] Comparative Example 1 of this application provides a pigment powder with the following formulation:

[0140] 63-75 parts white powder, 1-4 parts iron yellow powder, 0.3-1 part iron red powder, and 0.4-0.9 parts black powder.

[0141] Comparative Example 2

[0142] Comparative Example 2 of this application provides a pigment powder with the following formulation:

[0143] 7-10 parts nickel-titanium yellow powder, 42-45 parts iron yellow powder, 5-7 parts iron red powder, and 0.07-0.1 parts black powder.

[0144] Comparative Example 3

[0145] Comparative Example 3 of this application provides a method for preparing automotive interior materials, using the pigment powder of Comparative Example 1 and the preparation method of Example 15.

[0146] Comparative Example 4

[0147] Comparative Example 4 of this application provides a method for preparing automotive interior materials, using the pigment powder of Comparative Example 1 and the preparation method of Example 16.

[0148] Comparative Example 5

[0149] Comparative Example 3 of this application provides a method for preparing automotive interior materials, using the pigment powder of Comparative Example 1 and the preparation method of Example 15, wherein no pigment powder is added to the foaming layer.

[0150] Comparative Example 6

[0151] Comparative Example 4 of this application provides a method for preparing automotive interior materials, using the pigment powder of Comparative Example 1 and the preparation method of Example 16, wherein no pigment powder is added to the foaming layer.

[0152] Performance testing

[0153] The automotive interior materials prepared by the methods described in Examples 9 to 16 and Comparative Examples 3 to 4 were prepared into test samples, and their color difference values ​​were tested under different light sources. The specific testing method was as follows:

[0154] The colorimeter meets the testing standards of ASTM D 2244, E 308, E 1164, E2194; DIN 5033, 5036, 6174, 6175-2; DIN EN ISO 11664; and SAE J 545.

[0155] Colorimeter measurement angles: 45° illumination, -15°, 15°, 25°, 45°, 75°, 110° retroreflection observation.

[0156] Colorimetric data were measured under D65 and F11 illumination conditions in the colorimeter.

[0157] In the color measurement process, the direction parallel to the roller shaft of the PVC surface is defined as the transverse direction (H), and the direction perpendicular to the roller shaft of the PVC surface, i.e., the direction of PVC glue dispensing, is defined as the longitudinal direction (Z). When the long side of the measuring instrument is consistent with the transverse direction (H), the color measurement data is the transverse color difference value. This method of measurement is called transverse color difference measurement. When the long side of the depth sounder is consistent with the longitudinal direction (Z), the color measurement data is the longitudinal color difference value. This method of measurement is called longitudinal color difference measurement.

[0158] The maximum color difference value ΔE1 and the maximum color difference value ΔE2 under two light sources are measured at each angle in both the horizontal and vertical directions of the epidermis. The maximum value of ΔE1 and ΔE2 is taken as the measurement result ΔE, ensuring that the color difference at other angles does not exceed this value.

[0159] Testing equipment - BYK-maci multi-angle colorimeter.

[0160] The results are shown in Table 1.

[0161] Table 1. Color difference values ​​of automotive interior materials in Examples 9 to 16 and Comparative Examples 3 to 6.

[0162] D65 light source ΔE F11 light source ΔE Example 9 0.26 0.22 Example 10 0.20 0.18 Example 11 0.22 0.26 Example 12 0.40 0.46 Example 13 0.43 0.41 Example 14 0.17 0.13 Example 15 0.32 0.35 Example 16 0.33 0.29 Comparative Example 3 1.27 1.35 Comparative Example 4 1.61 1.57 Comparative Example 5 1.21 1.26 Comparative Example 6 1.59 1.52

[0163] If the color difference value meets DE*≤0.5, the longitudinal and transverse color difference can be considered negligible. As shown in Table 1, Comparative Example 3 has longitudinal and transverse color difference defects because it does not contain organic pigments, and the color difference value is greater than 0.5.

[0164] Comparative Example 4, lacking organic pigments, exhibits longitudinal and transverse color difference defects with a color difference value greater than 0.5.

[0165] Comparative Example 5, due to the absence of organic pigments and the fact that its preparation process is a surface PVC coloring process, exhibits longitudinal and transverse color difference defects, with a color difference value greater than 0.5.

[0166] Comparative Example 6, due to the absence of organic pigments and the fact that its preparation process is a surface PVC coloring process, exhibits longitudinal and transverse color difference defects with a color difference value greater than 0.5.

[0167] In Example 15, the roller temperature was too low, which affected the compatibility of the pigments. The color difference between the longitudinal and transverse directions was greater than that in Examples 9 to 11, but it still met the requirements.

[0168] In Example 16, the roller temperature was too high, which affected the compatibility of the pigments, resulting in a greater longitudinal and transverse color difference than in Examples 9 to 11, but it still met the requirements.

[0169] In Example 12, the organic pigments were less abundant, resulting in larger gaps between the pigments. After calendering, the molecular structure exhibited a transverse tendency, and the longitudinal and transverse color differences were greater than those in Examples 9 to 11, but still met the requirements.

[0170] In Example 13, the pigment contains more inorganic pigment, resulting in high film tension. After calendering, the molecular structure exhibits a transverse tendency, and its longitudinal and transverse color difference is greater than that of Examples 9 to 11, but it still meets the requirements.

[0171] Examples 13 to 16 are still superior to Comparative Examples 3 to 6. This demonstrates that by improving the formulation of the pigment and the molding process, the longitudinal and transverse color difference of the material can be improved.

[0172] In summary, by including organic pigments in the raw material composition, the defect of inconsistent color difference at various angles of inorganic pigment crystals can be overcome, making the color difference of pigments uniform at various angles, reducing the color difference of materials at different angles, and improving the problem of longitudinal and transverse color difference.

[0173] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0174] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. In this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly specified.

[0175] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An automotive interior material, characterized in that, The product comprises, from bottom to top, a base fabric layer, a PVC foam layer, and a PVC surface layer, wherein the materials of the PVC foam layer and the PVC surface layer include pigments for PVC calendering. The pigment powder raw material composition for the PVC calendering process includes white powder, nickel titanium yellow powder, phthalo red powder, and black powder, wherein, by mass parts, the raw materials include: 56-85 parts white powder, 4-7 parts nickel titanium yellow powder, 0.5-2.5 parts phthalo red powder, and 0.3-0.8 parts black powder; or, The pigment powder raw material composition for the PVC calendering process includes white powder, iron oxide red powder, 254 red powder, PY110 yellow powder, cobalt blue powder, and black powder. Specifically, by mass parts, the raw materials include: 14-22 parts white powder, 2-6 parts iron oxide red powder, 0.5-2.5 parts 254 red powder, 3-6 parts PY110 yellow powder, 0.05-0.25 parts cobalt blue powder, and 2.3-5.4 parts black powder. The automotive interior material is prepared by the following method: Pigment powder, PVC, plasticizer, stabilizer and filler are mixed to obtain PVC foam layer mixture liquid; The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer; Pigment powder, PVC, plasticizer, stabilizer and filler are mixed to obtain PVC surface layer mixture liquid; A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials. The process involves foaming the PVC foaming layer mixture onto a base fabric layer to form a PVC foaming layer. The forming method includes four-roller pressing and shearing plasticizing, wherein: the temperature of the first-stage roller is 170~180℃, and the rotation speed is 17~27 m / min; the temperature of the second-stage roller is 170~180℃, and the rotation speed is 27~37 m / min; the temperature of the third-stage roller is 160~170℃, and the rotation speed is 36~46 m / min; the temperature of the fourth-stage roller is 150~160℃, and the rotation speed is 40~50 m / min. The process of hydraulically calendering PVC surface layer mixture onto a PVC foam layer to form a PVC surface layer, resulting in automotive interior materials, involves calendering using a four-roller shearing plasticizing method. Specifically: the temperature of the first-stage roller is 180-190℃, and its rotation speed is 12-22 m / min; the temperature of the second-stage roller is 180-190℃, and its rotation speed is 21-31 m / min; the temperature of the third-stage roller is 175-185℃, and its rotation speed is 28-38 m / min; and the temperature of the fourth-stage roller is 170-180℃, and its rotation speed is 32-42 m / min.

2. A method for preparing automotive interior material as described in claim 1, characterized in that, Includes the following steps: Pigment powder, PVC, plasticizer, stabilizer and filler are mixed to obtain PVC foam layer mixture liquid; The PVC foaming layer mixture is foamed on the base fabric layer to form a PVC foaming layer; Pigment powder, PVC, plasticizer, stabilizer and filler are mixed to obtain PVC surface layer mixture liquid; A PVC surface layer is formed by hydraulically extruding a PVC surface layer mixture onto a PVC foam layer, thus obtaining automotive interior materials.

3. The method for preparing automotive interior materials as described in claim 2, characterized in that: In the process of mixing pigment powder, PVC, plasticizer, stabilizer, and filler to obtain a PVC foaming layer mixture, the mixing temperature is 130~150℃; and / or, In the process of mixing pigment powder, PVC, plasticizer, stabilizer, and filler to obtain a PVC foam layer mixture, the mixing time is 150-250 seconds; and / or, In the process of mixing pigments, PVC, plasticizers, stabilizers, and fillers to obtain a PVC surface layer mixture, the mixing temperature is 135~145℃; and / or, The process of mixing pigment powder, PVC, plasticizer, stabilizer and filler to obtain PVC surface layer mixture liquid: the mixing time is 200~300s.

4. A car, characterized in that, Including the automotive interior materials as described in claim 1.