CN114213764A - Polypropylene composite material for automotive interior and preparation method thereof - Google Patents
Polypropylene composite material for automotive interior and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a polypropylene composite material for automotive interior and a preparation method thereof. The composite material comprises the following components in parts by weight: 35-70 parts of polypropylene resin, 10-20 parts of toughening agent, 5-15 parts of soft touch modifier, 15-35 parts of filler, 0.5-1 part of weather resistant agent, 0.5-1 part of antioxidant and 0.5-1 part of dispersing agent. The polypropylene composite material special for the automotive interior disclosed by the invention has rich elasticity and soft touch.
Description
Technical Field
The invention relates to the field of high polymer materials, and particularly relates to a polypropylene composite material for automotive interior and a preparation method thereof
Background
Polypropylene (PP) is a crystalline polymer with a regular structure, is a thermoplastic resin which is white granular material, tasteless, nontoxic and light, has the advantages of easy processing, good impact strength, flexibility resistance and electrical insulation, and the like, and is widely applied to the fields of automobile industry, household appliances, electronics, packaging, building material furniture and the like. In the field of automobiles, polypropylene resin or modified polypropylene materials are mainly applied to interior trims such as door panels, instrument panels, auxiliary instrument panels, glove boxes and the like due to the characteristics of low price, light weight, easiness in molding and the like. However, because of the material characteristics of polypropylene, the molded automotive interior parts have hard touch feeling, and particularly, the instrument panel parts which have requirements on touch feeling are used, and the instrument panels molded by polypropylene can only be used in low-grade vehicles. In recent years, as people understand cars more and more beyond their functions, the hand feeling, dermatoglyph, color and tone of the dashboard gradually become important standards for judging the level of the whole car. For solving the problem of touch, the prior art mainly sprays soft touch paint on the surface of the automobile or uses a foaming material instead of a polypropylene material, but the technical processes are complex and high in cost, can only be applied to middle and high-grade automobiles, and cannot be popularized.
Patent CN104530573A discloses a low-gloss, low-warpage, soft-touch vehicular polypropylene composition, and preparation and application thereof. However, the inorganic filler used in the technology is glass fiber, the finally prepared material has strong plastic feeling, can not be directly applied to the field of automobiles, needs a skin covering process in the later period, and influences efficiency and cost.
Patent CN107141687A discloses a soft touch polypropylene composite material with low shrinkage and low warpage for automobile interior and a preparation method thereof, the fluff powder of the polypropylene composite material is added by 2-5%, the addition amount is too large, the physical properties of the material are affected, and the polypropylene composite material is easy to separate out in the using process; secondly, the inorganic filler is glass fiber and calcium silicate, so that the composite material has obvious anisotropy and poor stability and is easy to deform after long-term use; in addition, a large amount of compatilizer is added, so that the smell is large and the requirement of automotive interior is not met; and the composite material is not recyclable.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems in the prior art, the invention provides a polypropylene composite material for automotive interior and a preparation method thereof. The automotive interior is a polypropylene composite having a soft touch.
The technical scheme is as follows: the polypropylene composite material for the automotive interior comprises the following components in parts by weight: 35-70 parts of polypropylene resin, 10-20 parts of toughening agent, 5-15 parts of soft touch modifier, 15-35 parts of filler, 0.5-1 part of weather resistant agent, 0.5-1 part of antioxidant and 0.5-1 part of dispersant; the toughening agent is selected from one or two of ethylene-octene copolymer (POE) or styrene-butadiene-styrene block copolymer (SBS); the soft touch modifier is selected from one or more of Ethylene Propylene Diene Monomer (EPDM), ethylene-vinyl acetate copolymer (EVA), hydrogenated styrene block copolymer (SEBS) and organosilicon-polyurethane block copolymer (PSU); the filler is selected from one or more of glass fiber powder, carbon fiber, talcum powder and whisker; the antioxidant is selected from one or more of 1010, 1076, B225, 1098 and 168.
As a preferable mode of the invention, the composite material comprises the following components in parts by weight: 38.5-58.5 parts of polypropylene resin, 10-15 parts of toughening agent, 5-15 parts of soft touch modifier, 30-35 parts of filler, 0.5-1 part of weather resistant agent, 0.5-1 part of antioxidant and 0.5-1 part of dispersant.
As a preferable mode of the invention, the composite material comprises the following components in parts by weight: 38.5-58.5 parts of polypropylene resin, 10-15 parts of toughening agent, 5-15 parts of soft touch modifier, 35 parts of filler, 0.5 part of weather resistant agent, 0.5 part of antioxidant and 0.5 part of dispersing agent.
As a preferable mode of the invention, the composite material comprises the following components in parts by weight: 51.5 parts of polypropylene resin, 12 parts of toughening agent, 10 parts of soft touch modifier, 35 parts of filler, 0.5 part of weather resistant agent, 0.5 part of antioxidant and 0.5 part of dispersing agent.
In a preferred embodiment of the present invention, the carbon fiber is one of Zhongrena eagle 45S, 49S and Dongli T700.
In a preferred embodiment of the present invention, the antioxidant is 1010 and 168 in a mass ratio of 1: 1.
In a preferred embodiment of the present invention, the polypropylene resin is one or both of homo-PP and co-PP.
In a preferred embodiment of the present invention, the polypropylene resin is a copolymerized PP having a melt index of 30 to 100g/10 min.
In a preferred mode of the invention, the weather resisting agent is a hindered amine light stabilizer UV-770.
In a preferred embodiment of the present invention, the dispersant is one or more of calcium stearate, zinc stearate, PE wax, and silicone powder.
In a preferred embodiment of the present invention, the filler is talc powder and glass fiber powder in a mass ratio of 1:4 to 4: 1.
In a preferred embodiment of the present invention, the filler is talc powder and glass fiber powder in a mass ratio of 4:1, 3:2, or 2: 3.
In a preferable mode of the invention, the length-diameter ratio of the glass fiber powder is 4: 1-8: 1; fiber diameter: 9 to 13 μm.
In a preferred embodiment of the present invention, the talc powder has a mesh number of 2000 to 5000 mesh.
In a preferred embodiment of the present invention, the content of the silicone in the silicone-polyurethane block copolymer is 20 to 30%.
The preparation method of the polypropylene composite material for the automotive interior comprises the following steps:
(1) adding the polypropylene resin, the toughening agent, the soft touch modifier, the filler and the auxiliary agent into a stirrer, and stirring for 3-8 minutes at a rotating speed higher than 400 r/min;
(2) adding the mixed raw materials into a double-screw extruder for extrusion granulation, wherein the granulation process parameters comprise the following: the 1 region is 40-100 ℃, the 2 region is 170-. The temperature of the machine head is 200-230 ℃; the ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw host is 300-600 revolutions per minute, and the vacuum degree is-0.06 to-0.08 MPa.
In the present invention, "%" is a mass% unless otherwise specified.
Has the advantages that: the invention provides a soft touch automobile interior special polypropylene composite material, which is characterized in that a toughening agent and a soft touch modifier with specific requirements are added into polypropylene resin, so that the material shows a soft touch with rich elasticity; the material of the invention has good mechanical properties and the product retains a very good appearance.
Detailed Description
Firstly, the source of raw materials
Polypropylene resin: PP3204, Taiwan plastic, the melt index is 30g/10 min; a toughening agent: POE DF640, Mitsui chemistry, the melt index is between 3 and 4g/10 min; soft touch modifier: SEBS YH-503T, Balling petrochemical; the length-diameter ratio of the glass fiber powder is as follows: 8:1, Jingjiang Yinu; carbon fiber, Dongli T700; talc powder: TYT-777A (3000 mesh talc) manufacturer: liaoning adds the source; weather resistant UV-770, Tianjin Lianlong; an antioxidant, namely selecting Tianjin Lianlong 1010 and 168 according to the proportion of 1:1, compounding in proportion; dispersant PE wax, craine, designation 520.
Second, sample preparation
Example 1: a modified polypropylene material for vehicles with good touch feeling comprises the following components:
58.5 parts of PP3204 copolymer, 10 parts of POE DF640, 5 parts of SEBS YH-503T soft touch modifier, 20 parts of talcum powder 777A, 5 parts of glass fiber powder, 0.5 part of antioxidant, 0.5 part of dispersant PE520 and 0.5 part of weather resistant agent UV-770, and the soft touch modifier is prepared by the following steps:
a1, adding a mixture of polypropylene resin, a toughening agent, a soft touch modifier, a filler and an auxiliary agent (an antioxidant, a dispersing agent PE520 and a weather resisting agent UV-770) into a stirrer, and stirring for 6 minutes at a rotating speed higher than 400 r/min; a2, adding the mixed raw materials into a double-screw extruder through a main feed for extrusion and granulation, wherein the granulation process parameters comprise the following: zone 1 is 40 deg.C, zone 2 is 170 deg.C, zone 3 is 190 deg.C, zone 4 is 210 deg.C, and zones 5-8 are 220 deg.C. The temperature of the machine head is 220-230 ℃. The ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw main machine is 400 revolutions per minute, and the vacuum degree is minus 0.06 to minus 0.08 MPa.
Example 2: a modified polypropylene material for vehicles with good touch feeling comprises the following components:
51.5 parts of PP3204, 12 parts of POE DF640, 10 parts of soft touch modifier YH-503T, 15 parts of talcum powder 777A, 10 parts of glass fiber powder, 0.5 part of antioxidant, 0.5 part of dispersant PE520 and 78 parts of weather resistant agent UV-7700.5, wherein the preparation method comprises the following steps:
a1: adding a mixture of polypropylene resin, a toughening agent, a soft touch modifier, a filler and an auxiliary agent (an antioxidant, a dispersing agent PE520 and a weather resisting agent UV-770) into a stirrer, and stirring for 8 minutes at a rotating speed higher than 400 r/min; a2, adding the mixed raw materials into a double-screw extruder through a main feed for extrusion and granulation, wherein the granulation process parameters comprise the following: zone 1 is 50 deg.C, zone 2 is 190 deg.C, zone 3 is 210 deg.C, zone 4 is 220 deg.C, and zone 5-8 is 225 deg.C. The temperature of the machine head is 220-230 ℃. The ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw main machine is 450 revolutions per minute, and the vacuum degree is minus 0.06 to minus 0.08 MPa.
Example 3: a modified polypropylene material for vehicles with good touch feeling comprises the following components:
38.5 parts of PP3204, 15 parts of POE DF640, 15 parts of soft touch modifier YH-503T, 10 parts of talcum powder 777A, 15 parts of glass fiber powder, 0.5 part of antioxidant, 0.5 part of dispersant PE520 and 0.5 part of weather resistant agent UV-770, and the preparation method comprises the following steps:
a1: adding a mixture of polypropylene resin, a toughening agent, a soft touch modifier, a filler and an auxiliary agent (an antioxidant, a dispersing agent PE520 and a weather resisting agent UV-770) into a stirrer, and stirring for 6 minutes at a rotating speed higher than 400 r/min; a2, adding the mixed raw materials into a double-screw extruder through a main feed for extrusion and granulation, wherein the granulation process parameters comprise the following: zone 1 is 50 deg.C, zone 2 is 180 deg.C, zone 3 is 200 deg.C, zone 4 is 210 deg.C, and zone 5-8 is 220 deg.C. The temperature of the machine head is 220-230 ℃. The ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw main machine is 500 r/min, and the vacuum degree is-0.06 to-0.08 MPa.
Comparative example 1: 61.5 parts of PP3204 copolymer, 12 parts of POE DF640, 15 parts of talcum powder 777A, 10 parts of glass fiber powder, 0.5 part of antioxidant, 0.5 part of dispersing agent PE520 and 0.5 part of weather resistant agent UV-770, and the preparation method comprises the following steps: a1: adding a mixture of polypropylene resin, a toughening agent, a soft touch modifier, a filler and an auxiliary agent (an antioxidant, a dispersing agent PE520 and a weather resisting agent UV-770) into a stirrer, and stirring for 6 minutes at a rotating speed higher than 400 r/min; a2, adding the mixed raw materials into a double-screw extruder through a main feed for extrusion and granulation, wherein the granulation process parameters comprise the following: zone 1 is 50 deg.C, zone 2 is 180 deg.C, zone 3 is 200 deg.C, zone 4 is 210 deg.C, and zone 5-8 is 220 deg.C. The temperature of the machine head is 220-230 ℃. The ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw main machine is 500 r/min, and the vacuum degree is-0.06 to-0.08 MPa.
Comparative example 2: 63.5 parts of PP3204 copolymer, 10 parts of soft touch modifier YH-503T, 15 parts of talcum powder 777A, 10 parts of glass fiber powder, 0.5 part of antioxidant, 5200.5 parts of dispersing agent PE, and 7700.5 parts of weather resistant agent UV-7700.5, wherein the soft touch modifier YH-503T is prepared by the following steps:
a1, adding a mixture of polypropylene resin, a toughening agent, a soft touch modifier, a filler and an auxiliary agent (an antioxidant, a dispersing agent PE520 and a weather resisting agent UV-770) into a stirrer, and stirring for 6 minutes at a rotating speed higher than 400 r/min; a2, adding the mixed raw materials into a double-screw extruder through a main feed for extrusion and granulation, wherein the granulation process parameters comprise the following: zone 1 is 50 deg.C, zone 2 is 180 deg.C, zone 3 is 200 deg.C, zone 4 is 210 deg.C, and zone 5-8 is 220 deg.C. The temperature of the machine head is 220-230 ℃. The ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw main machine is 500 revolutions per minute, and the vacuum is-0.06 to-0.08 MPa.
Comparative example 3: 57.5 parts of PP3204, 8 parts of POE DF640, 8 parts of soft touch modifier YH-503T, 15 parts of talcum powder 777A, 10 parts of carbon fiber T700, 0.5 part of antioxidant, 0.5 part of dispersant PE520 and 0.5 part of weather resistant agent UV-770, and the preparation method comprises the following steps:
a1: adding a mixture of polypropylene resin, a toughening agent, a soft touch modifier, a filler and an auxiliary agent (an antioxidant, a dispersing agent PE520 and a weather resisting agent UV-770) into a stirrer, and stirring for 7 minutes at a rotating speed higher than 400 r/min; a2: adding the mixed raw materials into a double-screw extruder through a main feed for extrusion granulation, adding 10 parts of carbon fiber T700 from an exhaust port, wherein the granulation process parameters comprise the following: zone 1 is 50 deg.C, zone 2 is 180 deg.C, zone 3 is 200 deg.C, zone 4 is 210 deg.C, and zone 5-8 is 220 deg.C. The temperature of the machine head is 220-230 ℃. The ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw main machine is 500 r/min, and the vacuum degree is-0.06 to-0.08 MPa.
Comparative example 4: 33.5 parts of PP3204, 20 parts of POE DF640, 20 parts of soft touch modifier YH-503T, 15 parts of talcum powder 777A, 10 parts of glass fiber powder, 0.5 part of antioxidant, 0.5 part of dispersant PE520 and 0.5 part of weather resistant agent UV-770, and the preparation method comprises the following steps: a1, adding a mixture of polypropylene resin, a toughening agent, a soft touch modifier, a filler and an auxiliary agent (an antioxidant, a dispersing agent PE520 and a weather resisting agent UV-770) into a stirrer, and stirring for 8 minutes at a rotating speed higher than 400 r/min; a2, adding the mixed raw materials into a double-screw extruder through a main feed for extrusion and granulation, wherein the granulation process parameters comprise the following: zone 1 is 50 deg.C, zone 2 is 180 deg.C, zone 3 is 200 deg.C, zone 4 is 210 deg.C, and zone 5-8 is 220 deg.C. The temperature of the machine head is 220-230 ℃. The ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw main machine is 500 r/min, and the vacuum degree is-0.06 to-0.08 MPa.
TABLE 1 EXAMPLES 1 TO 3 AND COMPARATIVE EXAMPLES 1 TO 4, the proportions (in parts by weight) of the respective components
The performance test results of the polypropylene materials of examples 1-3 and comparative examples 1-4 are shown in Table 2, and the performance test methods are as follows:
(1) tensile strength was tested according to ISO 527:2012 standard;
(2) the flexural strength and flexural modulus were tested according to the ISO 178:2010 standard;
(3) the notched impact strength is tested according to the ISO 180:2000 standard;
(5) the shore hardness was tested according to ISO 7619:2010 standard.
(6) Soft touch performance: and (3) molding a square with the side length of 100mm and the thickness of 5mm, and after the square is placed at normal temperature for 24 hours, judging whether the square is soft by touching with hands.
Table 2 results of performance testing
As can be seen from Table 2, the materials of examples 1-3, which have added the toughening agent and the soft touch modifier with specific requirements, exhibit soft touch with rich elasticity and maintain the appearance of the product very well, while comparative example 1, which has YH-503T without added the softening agent, has hard touch and high gloss, and thus has poor touch and appearance; comparative example 2, where no toughening agent was added, the material was not smooth enough when stroked by hand and therefore had poor feel and appearance; the polypropylene resin tougheners of comparative examples 3 and 4, the softening agent SEBS YH-503T is not within the range defined by the invention, and the carbon fiber is added in the comparative example 3, so that the Shore hardness is higher than 45D, and the surface appearance touch feeling is poor. Comparative example 4, on the other hand, exhibited a poor tactile sensation with a shore hardness of less than 45D. The polypropylene material of example 2 has relatively the best mechanical properties.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The polypropylene composite material for the automotive interior is characterized by comprising the following components in parts by weight: 35-70 parts of polypropylene resin, 10-20 parts of toughening agent, 5-15 parts of soft touch modifier, 15-35 parts of filler, 0.5-1 part of weather resistant agent, 0.5-1 part of antioxidant and 0.5-1 part of dispersant; the toughening agent is selected from one or two of ethylene-octene polymer or styrene-butadiene-styrene block copolymer; the soft touch modifier is selected from one or more of ethylene propylene diene monomer, ethylene-vinyl acetate copolymer, hydrogenated styrene block copolymer and organic silicon-polyurethane block copolymer; the filler is selected from one or more of glass fiber powder, carbon fiber, talcum powder and whisker; the antioxidant is selected from one or more of 1010, 1076, B225, 1098 and 168.
2. The polypropylene composite for automotive interior according to claim 1, wherein the polypropylene resin is one or both of homo-PP and co-PP.
3. The polypropylene composite material for automotive interiors according to claim 2, wherein the polypropylene resin is a co-polypropylene having a melt index of 30-100 g/10 min.
4. The polypropylene composite for automotive interior according to claim 1, wherein the weather resistant agent is a hindered amine light stabilizer UV-770.
5. The polypropylene composite for automotive interior according to claim 1, wherein the dispersant is one or more of calcium stearate, zinc stearate, PE wax, and silicone powder.
6. The polypropylene composite material for automotive interiors according to claim 1, wherein the filler is talc powder and glass fiber powder in a mass ratio of 1: 4-4: 1.
7. The polypropylene composite material for automotive interiors according to claim 6, wherein the aspect ratio of the glass fiber powder is 4: 1-8: 1; fiber diameter: 9 to 13 μm.
8. The polypropylene composite material for automotive interiors according to claim 6, wherein the talc powder has a mesh number of 2000 to 5000 meshes.
9. The polypropylene composite material for automotive interiors according to claim 6, wherein the silicone-polyurethane block copolymer has a silicone content of 20 to 30%.
10. A method for preparing the polypropylene composite for automotive interiors according to claim 1, comprising the steps of:
(1) adding the polypropylene resin, the toughening agent, the soft touch modifier, the filler and the auxiliary agent into a stirrer, and stirring for 3-8 minutes at a rotating speed higher than 400 r/min;
(2) adding the mixed raw materials into a double-screw extruder for extrusion granulation, wherein the granulation process parameters comprise the following: the 1 region is 40-100 ℃, the 2 region is 170-. The temperature of the machine head is 200-230 ℃; the ratio L/D of the length L of the screw to the diameter D is 44: 1; the rotating speed of the double-screw host is 300-600 revolutions per minute, and the vacuum degree is-0.06 to-0.08 MPa.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330961A (en) * | 2015-11-12 | 2016-02-17 | 东莞市百励兴新材料有限公司 | Special polypropylene composite material for low-VOC soft-tactility automotive trimming and manufacturing method of material |
| CN106633415A (en) * | 2016-12-14 | 2017-05-10 | 广东圆融新材料有限公司 | Modified polypropylene material which touches well and is used for vehicles and preparation method of modified polypropylene material |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105330961A (en) * | 2015-11-12 | 2016-02-17 | 东莞市百励兴新材料有限公司 | Special polypropylene composite material for low-VOC soft-tactility automotive trimming and manufacturing method of material |
| CN106633415A (en) * | 2016-12-14 | 2017-05-10 | 广东圆融新材料有限公司 | Modified polypropylene material which touches well and is used for vehicles and preparation method of modified polypropylene material |
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