Composite material with rock texture, preparation method and application thereof

Abstract

The present invention discloses a composite material with a rock texture, its preparation method, and application. The composite material comprises 90-98% by weight of composition A and 2-10% by weight of composition B. Composition A comprises the following components by weight: 86-105 parts of a polymer base material; 1-5 parts of glass fiber; 0.1-0.5 parts of solvent blue 104 and 0.1-0.5 parts of solvent red 207; and 0.4-2 parts of an additive. Composition B comprises the following components by weight: 85-109 parts of a resin material; and 1-5 parts of a white pigment. The composite material of the present invention exhibits a strong three-dimensional effect, distinct rock texture layers, and a color and luster similar to real rock. Furthermore, the composite material of the present invention has balanced physical and mechanical properties, a wide processing window, and a lower odor level, making it more suitable for manufacturing automotive interior products.

Description

Technical Field

[0001] The present invention belongs to the field of materials, and in particular relates to a composite material with rock texture, a preparation method and an application thereof. Background Art

[0002] Polypropylene materials are widely used in the automotive industry for their balanced physical and mechanical properties and good processing properties. Automotive interior and exterior products including dashboards, instrument panels, pillars, bumpers and other products all use a large amount of polypropylene materials. Based on the application scenarios of polypropylene materials in the automotive field, giving the material more functional properties through targeted material design is the key development direction of automotive materials. Decorative parts with rock texture effects are widely used in home decoration and electronic appliances. In order to achieve a good appearance effect, the conventional processing method is to achieve it through multi-layer composite or in-mold transfer. The multi-layer composite process will have the problems of poor compatibility between multi-layer composite materials and easy peeling between layers. In-mold transfer has problems such as poor rock-like effect of the product appearance and large differences in texture and color from natural rocks. Summary of the Invention

[0003] In order to overcome the problems existing in the above-mentioned prior art, one of the objectives of the present invention is to provide a composite material with rock texture.

[0004] A second object of the present invention is to provide a method for preparing a composite material having rock texture.

[0005] A third object of the present invention is to provide a composite material with rock texture for use in automotive interior materials.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The first aspect of the present invention is to provide a composite material with a rock texture, which is composed of 90-98% by mass of composition A and 2-10% by mass of composition B; the composition A includes the following components in parts by weight: polymer matrix: 86-105 parts; glass fiber: 1-5 parts; solvent blue 104: 0.1-0.5 parts, solvent red 207: 0.1-0.5 parts; additive: 0.4-2 parts; the composition B includes the following components in parts by weight: resin material: 85-109 parts; white pigment: 1-5 parts.

[0008] The present invention introduces solvent red 207 and solvent blue 104 into composition A. By compounding solvent red 207 and solvent blue 104, the composite material exhibits a strong three-dimensional effect and a strong sense of rock texture layering, thereby ensuring the base color of the composite material and eliminating the influence of glass fiber on the surface morphology of the product. For example, the introduction of glass fiber into the composite material generally causes the floating fiber phenomenon, while the use of the formula in the present invention can avoid the occurrence of the floating fiber problem. (1) The present invention selects polypropylene as the main substrate to ensure the good processing performance of the material, and by adding POE, antioxidants, and light stabilizers, ensures that the final material has good impact toughness and light and heat aging resistance.

[0009] Preferably, based on the total mass percentage of the composite material with rock texture being 100%, the mass percentage of the composition A is 94-97%; and the mass percentage of the composition B is 3-6%.

[0010] Preferably, the polymer substrate is selected from at least one of polypropylene resin and POE; further preferably, the polymer substrate is a composition of polypropylene and polyolefin elastomer (POE).

[0011] Preferably, the polymer matrix comprises the following components in parts by weight: 77 to 90 parts of polypropylene resin; and 9 to 15 parts of POE.

[0012] Preferably, the weight proportion of the polypropylene resin is 78 to 82 parts; further preferably, the weight proportion of the polypropylene resin is 79 to 81 parts.

[0013] Preferably, the POE is a polyolefin elastomer copolymerized with ethylene and α-olefin, and more preferably, the POE is a polyolefin elastomer copolymerized with ethylene and α-octene. The main function of POE is to improve the overall toughness of the composite material.

[0014] Preferably, the weight proportion of the POE is 10 to 14 parts; further preferably, the weight proportion of the POE is 11 to 13 parts.

[0015] Preferably, the auxiliary agent is selected from at least one of an antioxidant, a light stabilizer, and a lubricant.

[0016] Preferably, the auxiliary agent includes the following components in parts by weight: 0.2 to 1 part of antioxidant; 0.2 to 1 part of light stabilizer.

[0017] Preferably, the antioxidant is selected from at least one of antioxidant 1010 and antioxidant 168; further preferably, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1: (0.8-1.2).

[0018] Preferably, the light stabilizer is selected from at least one of light stabilizer 770 and light stabilizer 944; further preferably, the light stabilizer is a mixture of light stabilizer 770 and light stabilizer 944 in a mass ratio of 1: (0.8-1.2).

[0019] Preferably, the resin material is selected from at least one of PC resin and SMA resin; further preferably, the resin material is a combination of PC and SMA resins. The combination of PC and SMA resins is selected as the carrier resin for the white pigment to ensure a melting point difference between the PC and SMA resins and the polypropylene resin substrate, resulting in different melting states during the injection molding process. This creates a white texture effect against a gray background, giving the finished composite material a strong, three-dimensional rock texture and distinct layering. SMA resin also acts as a compatibilizer between PC, PP, and glass fiber, enhancing compatibility among the three resins.

[0020] Preferably, the resin material comprises the following components in parts by weight: 75 to 89 parts of PC resin; 10 to 20 parts of SMA resin.

[0021] Preferably, the weight percentage of PC resin is 80 to 89 parts, and more preferably, the weight percentage of PC resin is 80 to 84 parts. PC resin serves as the main carrier of white pigment, solvent blue 104 and solvent red 207.

[0022] Preferably, the SMA resin is a copolymer of styrene and maleic anhydride; further preferably, the SMA resin is a random copolymer of styrene and maleic anhydride; and / or, the SMA resin is a block copolymer of styrene and maleic anhydride; even further preferably, the SMA resin is a block copolymer of styrene and maleic anhydride.

[0023] Preferably, the weight proportion of the SMA resin is 14 to 18 parts.

[0024] Preferably, the glass fiber is an alkali-free chopped glass fiber; further preferably, the glass fiber is an alkali-free chopped glass fiber with a fiber diameter of 8 to 12 μm.

[0025] Preferably, the weight portion of the glass fiber is 2 to 4. The addition of glass fiber can utilize its special structural characteristics to assist the irregular dispersion of white pigment in the composite material, thereby allowing the composite material to exhibit a strong three-dimensional rock texture effect.

[0026] Preferably, the white pigment is rutile titanium dioxide.

[0027] Compared to using a single black pigment, the present invention uses a combination of Solvent Red 207 and Solvent Blue 104 to achieve a three-dimensional black effect on the composite material surface. This black effect has a stronger three-dimensional sense. Furthermore, the melting points of Solvent Red 207 and Solvent Blue 104 are suitable for extrusion and injection molding, and they do not change color during the high-temperature extrusion and injection molding process. Therefore, Solvent Red 104 and Solvent Blue 207 are preferred. Solvent Red 207 and Solvent Blue 104 play a crucial role in preparing composite materials with a rock-textured effect.

[0028] Preferably, the weight portion of the solvent blue 104 / solvent red 207 is 0.1 to 0.3 parts.

[0029] Preferably, the composite material with rock texture is composed of 90-98% by mass of composition A and 2-10% by mass of composition B; the composition A includes the following components in parts by weight: 77-90 parts of polypropylene resin; 9-15 parts of POE; 1-5 parts of glass fiber; 0.1-0.5 parts of solvent blue 104 and 0.1-0.5 parts of solvent red 207; 0.2-1 parts of antioxidant; and 0.2-1 parts of light stabilizer; the composition B includes the following components in parts by weight: 75-89 parts of PC resin; 10-20 parts of SMA resin; and 1-5 parts of white pigment.

[0030] The second aspect of the present invention provides a method for preparing the composite material having a rock texture provided by the first aspect of the present invention, comprising the following steps:

[0031] Premixing the components of composition A and composition B respectively and then extruding them to obtain a composite material of composition A and a composite material of composition B;

[0032] The composite material of composition A and the composite material of composition B are blended and then injection molded to obtain the composite material with rock texture.

[0033] Preferably, the premixing temperature is not lower than 60°C; further preferably, the premixing temperature is 60-150°C.

[0034] Preferably, the premixing stirring speed is 800-1200 r / min; further preferably, the premixing stirring speed is 900-1100 r / min.

[0035] Preferably, the premixing time is 1 to 2 minutes.

[0036] Preferably, the extrusion temperature is 170-260°C.

[0037] Preferably, the extrusion temperature of the composite material of composition A is 170-210°C.

[0038] Preferably, the extrusion temperature of the composite material of composition B is 230-260°C.

[0039] Preferably, the extrusion screw speed is 500-600 r / min.

[0040] Preferably, the injection molding temperature is 180-240°C.

[0041] The third aspect of the present invention provides use of the composite material with rock texture provided by the first aspect of the present invention in automobile decorative materials.

[0042] The beneficial effects of the present invention are: the composite material of the present invention has a strong three-dimensional effect, distinct rock texture layers, and color and gloss similar to real rocks. At the same time, the composite material of the present invention also has balanced physical and mechanical properties, a wide processing window, and a lower odor level, making it more suitable for manufacturing automotive interior products.

[0043] The composite material of the present invention can achieve an appearance with a rock texture through direct extrusion injection molding, has a simpler production process, lower overall manufacturing cost, is more environmentally friendly and low-carbon, and is suitable for large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a physical picture of the polypropylene composite material in Examples 1 to 3.

[0045] Figure 2 This is a physical picture of the polypropylene composite material in Comparative Example 2. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but the implementation and protection of the present invention are not limited thereto. It should be noted that if there are any processes that are not particularly described in detail below, they can be implemented or understood by those skilled in the art with reference to the prior art. The reagents or instruments used that do not indicate the manufacturer are all conventional products that can be purchased commercially.

[0047] Raw material information is as follows:

[0048] Polypropylene resin, trade name: PPEP548R, purchased from CNOOC Shell Petrochemical Co., Ltd.;

[0049] POE, trade name: POE LC565, purchased from LG Chem, South Korea;

[0050] Glass fiber, trade name: T438, purchased from Taishan Glass Fiber Co., Ltd.

[0051] Solvent blue 104 and solvent red 207 were purchased from MacLean's reagent;

[0052] Antioxidant, trade name: BASF antioxidant 1010 / 168, purchased from BASF China Co., Ltd.;

[0053] Light stabilizer, trade name: Light stabilizer 770 / 944, purchased from BASF China Co., Ltd.;

[0054] PC resin, trade name: PCIR2200, purchased from Idemitsu Kosan Co., Ltd., Japan;

[0055] SMA resin, trade name: SMA26080, purchased from BV Xiran;

[0056] Titanium dioxide, trade name: R108, purchased from DuPont;

[0057] PA6 resin, trade name: PA6M2400, purchased from Xinhui Meida Co., Ltd.

[0058] Compatibilizer, trade name: PP-g-MAH, was purchased from Shanghai Rizhisheng Technology Co., Ltd.

[0059] Example 1

[0060] The polypropylene composite material with rock texture in this example is composed of the following components in the following weight percentages: 97% of composition A and 3% of composition B.

[0061] Composition A is composed of the following components in parts by weight: 84 parts of polypropylene resin (trade name PPEP548R, CNOOC Shell), 12 parts of POE (POE LC565, LG), 3 parts of glass fiber (T438, Taishan Fiberglass), 0.2 parts of solvent blue 104 (McLean), 0.2 parts of solvent red 207 (McLean), 0.3 parts of antioxidant (1010 / 168, BASF), and 0.3 parts of light stabilizer (770 / 944, BASF).

[0062] Composition B is composed of the following components in parts by weight: 82 parts of PC resin (PCIR2200, Illuminating), 15 parts of SMA resin (SMA26080, BV Xiran), and 3 parts of titanium dioxide (R108, DuPont).

[0063] The polypropylene composite material with rock texture in this example was prepared by the following preparation method, which specifically includes the following steps:

[0064] (1) The components of composition A are premixed in a high-speed mixer at a premixing temperature of 100° C., a stirring speed of 1000 r / min, and a premixing time of 2 min; and then added from the main feeding port of a twin-screw extruder, the temperatures of the heating sections of the extruder are: 80-100° C. in the first zone, 190-210° C. in the second zone, 210-230° C. in the third zone, 230-240° C. in the fourth zone, 240-230° C. in the fifth zone, 240-230° C. in the sixth zone, 240-230° C. in the seventh zone, 230-220° C. in the eighth zone, and 230-220° C. in the ninth zone, and the screw speed of the main machine is 550 r / min. The composite material of composition A is obtained by melt blending, stranding, water cooling, pelletizing, and drying.

[0065] (2) The components of composition B were premixed in a high-speed mixer at a premixing temperature of 100°C, a stirring speed of 1000 r / min, and a premixing time of 2 min; then, the components were added from the main feeding port of a twin-screw extruder, and the temperatures of the heating sections of the extruder were: 80-100°C in the first zone, 190-210°C in the second zone, 210-230°C in the third zone, 230-240°C in the fourth zone, 240-230°C in the fifth zone, 240-230°C in the sixth zone, 240-230°C in the seventh zone, 230-220°C in the eighth zone, and 230-220°C in the ninth zone. The screw speed of the main machine was 550 r / min, and the composite material of composition B was obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0066] (3) After the composition A composite material and the composition B composite material are mixed in a mass ratio of 97:3, they are dried. The temperatures of the heating sections of the injection molding machine are: 180-190°C in the first zone, 200-210°C in the second zone, and 190-200°C in the third zone. The polypropylene composite material with a rock texture in this example is obtained by injection molding.

[0067] Example 2

[0068] The polypropylene composite material with rock texture in this example is composed of the following components in the following weight percentages: 95% of composition A and 5% of composition B.

[0069] Composition A is composed of the following components in parts by weight: 84 parts of polypropylene resin (PPEP548R, CNOOC Shell), 12 parts of POE (POE LC565, LG), 3 parts of glass fiber (T438, Taishan Fiberglass), 0.2 parts of solvent blue 104 (McLean), 0.2 parts of solvent red 207 (McLean), 0.3 parts of antioxidant (1010 / 168, BASF), and 0.3 parts of light stabilizer (770 / 944, BASF).

[0070] Composition B is composed of the following components in parts by weight: 82 parts of PC resin (PCIR2200, Illuminating), 15 parts of SMA resin (SMA26080, BV Xiran), and 3 parts of titanium dioxide (R108, DuPont).

[0071] The polypropylene composite material with rock texture in this example was prepared by the following preparation method, which specifically includes the following steps:

[0072] (1) The components of composition A are premixed in a high-speed mixer at a premixing temperature of 100° C., a stirring speed of 1000 r / min, and a premixing time of 2 min; and then added from the main feeding port of a twin-screw extruder, the temperatures of the heating sections of the extruder are: 80-100° C. in the first zone, 190-210° C. in the second zone, 210-230° C. in the third zone, 230-240° C. in the fourth zone, 240-230° C. in the fifth zone, 240-230° C. in the sixth zone, 240-230° C. in the seventh zone, 230-220° C. in the eighth zone, and 230-220° C. in the ninth zone, and the screw speed of the main machine is 550 r / min. The composite material of composition A is obtained by melt blending, stranding, water cooling, pelletizing, and drying.

[0073] (2) The components of composition B were premixed in a high-speed mixer at a premixing temperature of 100°C, a stirring speed of 1000 r / min, and a premixing time of 2 min; then, the components were added from the main feeding port of a twin-screw extruder, and the temperatures of the heating sections of the extruder were: 80-100°C in the first zone, 190-210°C in the second zone, 210-230°C in the third zone, 230-240°C in the fourth zone, 240-230°C in the fifth zone, 240-230°C in the sixth zone, 240-230°C in the seventh zone, 230-220°C in the eighth zone, and 230-220°C in the ninth zone. The screw speed of the main machine was 550 r / min, and the composite material of composition B was obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0074] (3) After the composite material of composition A and the composite material of composition B are mixed in a mass ratio of 95:5, they are dried. The temperatures of the heating sections of the injection molding machine are: 180-190°C in the first zone, 200-210°C in the second zone, and 190-200°C in the third zone. The polypropylene composite material with a rock texture in this example is obtained by injection molding.

[0075] Example 3

[0076] The polypropylene composite material with rock texture in this example is composed of the following components in the following weight percentages: 94% of composition A and 6% of composition B.

[0077] Composition A is composed of the following components in parts by weight: 84 parts of polypropylene resin (PPEP548R, CNOOC Shell), 12 parts of POE (POE LC565, LG), 3 parts of glass fiber (T438, Taishan Fiberglass), 0.2 parts of solvent blue 104 (McLean), 0.2 parts of solvent red 207 (McLean), 0.3 parts of antioxidant (1010 / 168, BASF), and 0.3 parts of light stabilizer (770 / 944, BASF).

[0078] Composition B is composed of the following components in parts by weight: 82 parts of PC resin (PCIR2200, Illuminating), 15 parts of SMA resin (SMA26080, BV Xiran), and 3 parts of titanium dioxide (R108, DuPont).

[0079] The polypropylene composite material with rock texture in this example was prepared by the following preparation method, which specifically includes the following steps:

[0080] (1) The components of composition A are premixed in a high-speed mixer at a premixing temperature of 100° C., a stirring speed of 1000 r / min, and a premixing time of 2 min; and then added from the main feeding port of a twin-screw extruder, the temperatures of the heating sections of the extruder are: 80-100° C. in the first zone, 190-210° C. in the second zone, 210-230° C. in the third zone, 230-240° C. in the fourth zone, 240-230° C. in the fifth zone, 240-230° C. in the sixth zone, 240-230° C. in the seventh zone, 230-220° C. in the eighth zone, and 230-220° C. in the ninth zone, and the screw speed of the main machine is 550 r / min. The composite material of composition A is obtained by melt blending, stranding, water cooling, pelletizing, and drying.

[0081] (2) The components of composition B were premixed in a high-speed mixer at a premixing temperature of 100°C, a stirring speed of 1000 r / min, and a premixing time of 2 min; then, the components were added from the main feeding port of a twin-screw extruder, and the temperatures of the heating sections of the extruder were: 80-100°C in the first zone, 190-210°C in the second zone, 210-230°C in the third zone, 230-240°C in the fourth zone, 240-230°C in the fifth zone, 240-230°C in the sixth zone, 240-230°C in the seventh zone, 230-220°C in the eighth zone, and 230-220°C in the ninth zone. The screw speed of the main machine was 550 r / min, and the composite material of composition B was obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0082] (3) After the composite material of composition A and the composite material of composition B were mixed in a mass ratio of 94:6, they were dried. The temperatures of the heating sections of the injection molding machine were: 180-190°C in the first zone, 200-210°C in the second zone, and 190-200°C in the third zone. The polypropylene composite material with a rock texture in this example was obtained by injection molding.

[0083] The physical pictures of the polypropylene composite materials with rock texture in Examples 1 to 3 are as follows: Figure 1 (a) Figure 1 (b) and Figure 1 (c) Figure 1 The scale ratio of the product is 1:1; Figure 1 It can be seen that the composite materials in Examples 1 to 3 have good rock texture and rock color, are similar to the color and texture of natural rocks, and have good rock-imitation texture effects.

[0084] Comparative Example 1

[0085] The polypropylene composite material in this example is composed of the following components in the following weight percentages: 94% of composition A and 6% of composition B.

[0086] Composition B is composed of the following components in parts by weight: 87 parts of polypropylene resin (PPEP548R, CNOOC Shell), 12 parts of POE (POE LC565, LG), 0.2 parts of solvent blue 104 (McLean), 0.2 parts of solvent red 207 (McLean), 0.3 parts of antioxidant (1010 / 168, BASF), and 0.3 parts of light stabilizer (770 / 944, BASF).

[0087] Composition A is composed of the following components in parts by weight: 82 parts of PC resin (PCIR2200, Illuminating), 15 parts of SMA resin (SMA26080, BV Xiran), and 3 parts of titanium dioxide (R108, DuPont).

[0088] The polypropylene composite material in this example was prepared by the following preparation method, which specifically includes the following steps:

[0089] (1) The components of composition A are premixed in a high-speed mixer at a premixing temperature of 100° C., a stirring speed of 1000 r / min, and a premixing time of 2 min; and then added into a twin-screw extruder from a main feeding port. The temperatures of the heating sections of the extruder are as follows: 80-100° C. in the first zone, 170-190° C. in the second zone, 190-200° C. in the third zone, 200-210° C. in the fourth zone, 200-210° C. in the fifth zone, 190-200° C. in the sixth zone, 200-210° C. in the seventh zone, 200-210° C. in the eighth zone, and 190-200° C. in the ninth zone. The screw speed of the main machine is 550 r / min. The composite material of composition A is obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0090] (2) The components of composition B were premixed in a high-speed mixer at a premixing temperature of 100°C, a stirring speed of 1000 r / min, and a premixing time of 2 min; then, the components were added from the main feeding port of a twin-screw extruder, and the temperatures of the heating sections of the extruder were: 80-100°C in the first zone, 190-210°C in the second zone, 210-230°C in the third zone, 230-240°C in the fourth zone, 240-230°C in the fifth zone, 240-230°C in the sixth zone, 240-230°C in the seventh zone, 230-220°C in the eighth zone, and 230-220°C in the ninth zone. The screw speed of the main machine was 550 r / min, and the composite material of composition B was obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0091] (3) After the composition A composite material and the composition B composite material are mixed in a mass ratio of 94:6, they are dried. The temperatures of the heating sections of the injection molding machine are: 180-190°C in the first zone, 200-210°C in the second zone, and 190-200°C in the third zone. The polypropylene composite material in this example is obtained by injection molding.

[0092] Comparative Example 2

[0093] The polypropylene composite material in this example is composed of the following components in the following weight percentages: 94% of composition A and 6% of composition B.

[0094] Composition A is composed of the following components in parts by weight: 84 parts of polypropylene resin (PPEP548R, CNOOC Shell), 12 parts of POE (POE LC565, LG), 3 parts of glass fiber (T438, Taishan Fiberglass), 0.4 parts of carbon black, 0.3 parts of antioxidant (1010 / 168, BASF), and 0.3 parts of light stabilizer (770 / 944, BASF).

[0095] Composition B is composed of the following components in parts by weight: 82 parts of PC resin (PCIR2200, Illuminating), 15 parts of SMA resin (SMA26080, BV Xiran), and 3 parts of titanium dioxide (R108, DuPont).

[0096] The polypropylene composite material in this example was prepared by the following preparation method, which specifically includes the following steps:

[0097] (1) The components of composition A are pre-mixed in a high-speed mixer at a pre-mixing temperature of 100°C, a stirring speed of 1000 r / min, and a pre-mixing time of 2 min; and then added from the main feed port of a twin-screw extruder. The temperatures of the heating sections of the extruder are: first zone 80-100°C, second zone 170-190°C, third zone 190-200°C, fourth zone 200-210°C, fifth zone 200-210°C, sixth zone 190-200°C, seventh zone 200-210°C, eighth zone 200-210°C, and ninth zone 190-200°C. The screw speed of the main machine is 550 r / min. The composite material of composition A is obtained by melt blending, stranding, water cooling, pelletizing, and drying.

[0098] (2) The components of composition B were premixed in a high-speed mixer at a premixing temperature of 100°C, a stirring speed of 1000 r / min, and a premixing time of 2 min; then, the components were added from the main feeding port of a twin-screw extruder, and the temperatures of the heating sections of the extruder were: 80-100°C in the first zone, 190-210°C in the second zone, 210-230°C in the third zone, 230-240°C in the fourth zone, 240-230°C in the fifth zone, 240-230°C in the sixth zone, 240-230°C in the seventh zone, 230-220°C in the eighth zone, and 230-220°C in the ninth zone. The screw speed of the main machine was 550 r / min, and the composite material of composition B was obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0099] (3) After the composition A composite material and the composition B composite material are mixed in a mass ratio of 94:6, they are dried. The temperatures of the heating sections of the injection molding machine are: 180-190°C in the first zone, 200-210°C in the second zone, and 190-200°C in the third zone. The polypropylene composite material in this example is obtained by injection molding.

[0100] The actual picture of the polypropylene composite material in this example is as follows Figure 2 As shown, Figure 2 The scale ratio with the actual product is 1:1. Figure 2 It can be seen that the composite material in this example has a poor rock imitation effect, the rock texture has no layered sense, and is very different from the texture of natural rock.

[0101] Comparative Example 3

[0102] The polypropylene composite material in this example is composed of the following components in the following weight percentages: 94% of composition A and 6% of composition B.

[0103] Composition A is composed of the following components in parts by weight: 84.3 parts of polypropylene resin (PPEP548R, CNOOC Shell), 12 parts of POE (POE LC565, LG), 3 parts of glass fiber (T438, Taishan Fiberglass), 0.4 parts of carbon black, and 0.3 parts of antioxidant (1010 / 168, BASF).

[0104] Composition B is composed of the following components in parts by weight: 87 parts of PA6 resin (PA6M2400, Xinhui Meida), 10 parts of compatibilizer (PP-g-MAH), and 3 parts of titanium dioxide (R108, DuPont).

[0105] The polypropylene composite material in this example was prepared by the following preparation method, which specifically includes the following steps:

[0106] (1) The components of composition A are premixed in a high-speed mixer at a premixing temperature of 100° C., a stirring speed of 1000 r / min, and a premixing time of 2 min; and then added into a twin-screw extruder from a main feeding port. The temperatures of the heating sections of the extruder are as follows: 80-100° C. in the first zone, 170-190° C. in the second zone, 190-200° C. in the third zone, 200-210° C. in the fourth zone, 200-210° C. in the fifth zone, 190-200° C. in the sixth zone, 200-210° C. in the seventh zone, 200-210° C. in the eighth zone, and 190-200° C. in the ninth zone. The screw speed of the main machine is 550 r / min. The composite material of composition A is obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0107] (2) The components of composition B were premixed in a high-speed mixer at a premixing temperature of 100°C, a stirring speed of 1000 r / min, and a premixing time of 2 min; then, the components were added from the main feeding port of a twin-screw extruder, and the temperatures of the heating sections of the extruder were: 80-100°C in the first zone, 190-210°C in the second zone, 210-230°C in the third zone, 230-240°C in the fourth zone, 240-230°C in the fifth zone, 240-230°C in the sixth zone, 240-230°C in the seventh zone, 230-220°C in the eighth zone, and 230-220°C in the ninth zone. The screw speed of the main machine was 550 r / min, and the composite material of composition B was obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0108] (3) After the composition A composite material and the composition B composite material are mixed in a mass ratio of 94:6, they are dried. The temperatures of the heating sections of the injection molding machine are: 180-190°C in the first zone, 200-210°C in the second zone, and 190-200°C in the third zone. The polypropylene composite material in this example is obtained by injection molding.

[0109] Comparative Example 4

[0110] The polypropylene composite material in this example is composed of the following components in the following mass percentages: 94% of composition A and 6% of composition B.

[0111] Composition A is composed of the following components in parts by weight: 99.4 parts of polypropylene resin (PPEP548R, CNOOC Shell), 0.3 parts of antioxidant (1010 / 168, BASF), and 0.3 parts of light stabilizer (770 / 944, BASF).

[0112] Composition B is composed of the following components in parts by weight: 85 parts of PC resin (PCIR2200, Illuminating), 15 parts of SMA resin (SMA26080, BV Xiran).

[0113] The polypropylene composite material in this example was prepared by the following preparation method, which specifically includes the following steps:

[0114] (1) The components of composition A are premixed in a high-speed mixer at a premixing temperature of 100° C., a stirring speed of 1000 r / min, and a premixing time of 2 min; and then added into a twin-screw extruder from a main feeding port. The temperatures of the heating sections of the extruder are as follows: 80-100° C. in the first zone, 170-190° C. in the second zone, 190-200° C. in the third zone, 200-210° C. in the fourth zone, 200-210° C. in the fifth zone, 190-200° C. in the sixth zone, 200-210° C. in the seventh zone, 200-210° C. in the eighth zone, and 190-200° C. in the ninth zone. The screw speed of the main machine is 550 r / min. The composite material of composition A is obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0115] (2) The components of composition B were premixed in a high-speed mixer at a premixing temperature of 100°C, a stirring speed of 1000 r / min, and a premixing time of 2 min; then, the components were added from the main feeding port of a twin-screw extruder, and the temperatures of the heating sections of the extruder were: 80-100°C in the first zone, 190-210°C in the second zone, 210-230°C in the third zone, 230-240°C in the fourth zone, 240-230°C in the fifth zone, 240-230°C in the sixth zone, 240-230°C in the seventh zone, 230-220°C in the eighth zone, and 230-220°C in the ninth zone. The screw speed of the main machine was 550 r / min, and the composite material of composition B was obtained by melt blending, drawing, water cooling, pelletizing, and drying.

[0116] (3) After the composition A composite material and the composition B composite material are mixed in a mass ratio of 94:6, they are dried. The temperatures of the heating sections of the injection molding machine are: 180-190°C in the first zone, 200-210°C in the second zone, and 190-200°C in the third zone. The polypropylene composite material in this example is obtained by injection molding.

[0117] Performance testing:

[0118] The melt index, tensile strength, notched impact strength, odor, and weather resistance of the polypropylene composite materials in Examples 1-3 and Comparative Examples 1-4 were tested according to the test methods described in the corresponding standards, and the test results are recorded in Table 1. Flow pattern evaluation method: The materials were injection molded into 100 mm × 100 mm × 2 mm sample plates using the same molding process. Three professional technicians visually observed the layering of the rock texture, the texture of the color, and the gloss of the material, and comprehensively evaluated and compared the texture effects of the different sample plates. The judgment was made based on the comparison results. The specific test results are shown in Table 1.

[0119] Table 1 Properties of polypropylene composite materials in Examples 1 to 3 and Comparative Examples 1 to 4

[0120]

[0121] As shown in Table 1, compared with Comparative Example 1, the addition of glass fiber in Examples 1-3 increased the tensile strength and significantly enhanced the rock-like texture effect. The resulting polypropylene composites exhibited a good texture effect, indicating that the addition of glass fiber can assist in the irregular dispersion of the titanium dioxide pigment in the composite, thereby achieving the product's rock-like texture effect. Compared with Comparative Example 2, Examples 1-3 used a combination of Solvent Blue 104 and Solvent Red 207 to replace the carbon black pigment. The resulting polypropylene composites exhibited a better sense of layered rock texture and a better rock-like effect. Compared with Comparative Example 3, the polypropylene composites produced in Examples 1-3 using a light stabilizer exhibited better odor levels and weather resistance, and the composites' rock-like texture effect was also significantly improved.

[0122] While the embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. A composite material with a rock texture, characterized in that: The invention is composed of 90-98% by weight of composition A and 2-10% by weight of composition B; the composition A comprises the following components in parts by weight: polymer matrix: 86-105 parts; glass fiber: 1-5 parts; solvent blue 104: 0.1-0.5 parts; solvent red 207: 0.1-0.5 parts; Additive: 0.4-2 parts; the composition B comprises the following components in parts by weight: resin material: 85-109 parts; white pigment: 1-5 parts; The polymer substrate comprises the following components in parts by weight: 77 to 90 parts of polypropylene resin; 9 to 15 parts of POE; The auxiliary agent includes the following components in parts by weight: 0.2 to 1 part of antioxidant; 0.2 to 1 part of light stabilizer; The resin material comprises the following components in parts by weight: 75 to 89 parts of PC resin and 10 to 20 parts of SMA resin.

2. The composite material with rock texture according to claim 1, characterized in that: The antioxidant is selected from at least one of antioxidant 1010 and antioxidant 168; and / or the light stabilizer is selected from at least one of light stabilizer 770 and light stabilizer 944.

3. The composite material with rock texture according to claim 1, characterized in that: The glass fiber is alkali-free chopped glass fiber; and / or the white pigment is rutile titanium dioxide.

4. The method for preparing the composite material having rock texture according to any one of claims 1 to 3, characterized in that: The following steps are involved: Premixing the components of composition A and composition B respectively and then extruding them to obtain a composite material of composition A and a composite material of composition B; The composite material of composition A and the composite material of composition B are blended and then injection molded to obtain the composite material with rock texture.

5. The method for preparing a composite material having a rock texture according to claim 4, characterized in that: The premixing temperature is not lower than 60° C., and the premixing stirring speed is 800-1200 r / min.

6. The method for preparing a composite material having a rock texture according to claim 4, characterized in that: The extrusion temperature is 170-260° C., and the extrusion screw speed is 500-600 r / min.

7. Use of the composite material with rock texture according to any one of claims 1 to 3 in automobile decorative materials.

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