WO2022011953A1 - 一种高透光、轻量化聚丙烯复合材料及其制备方法 - Google Patents

一种高透光、轻量化聚丙烯复合材料及其制备方法 Download PDF

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WO2022011953A1
WO2022011953A1 PCT/CN2020/136308 CN2020136308W WO2022011953A1 WO 2022011953 A1 WO2022011953 A1 WO 2022011953A1 CN 2020136308 W CN2020136308 W CN 2020136308W WO 2022011953 A1 WO2022011953 A1 WO 2022011953A1
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parts
composite material
light
polypropylene composite
resin
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French (fr)
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吴亦建
俞飞
雷亮
黄险波
叶南飚
杨波
卢朝亮
苏娟霞
吴国峰
罗忠富
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Kingfa Science and Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/04—External Ornamental or guard strips; Ornamental inscriptive devices thereon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/004—Additives being defined by their length
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group

Definitions

  • the invention relates to the field of polymer material modification, in particular to a high-light-transmitting, lightweight polypropylene composite material and a preparation method thereof.
  • polypropylene As a cost-effective general-purpose plastic, polypropylene (PP) has excellent mechanical properties after toughening and modification, and is easy to form and process, and is widely used in home appliances and automotive products.
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • Traditional automotive polypropylene interior and exterior trim materials are usually prepared by blending raw materials such as polypropylene, elastomers, and talc through twin-screw extruders and other processing equipment.
  • this conventional solution causes large light reflection, light absorption and light scattering problems. Therefore, although the modified PP has the advantages of high flowability and high impact, the light transmission properties of the traditional modified PP materials are not high.
  • PP materials for vehicles often need to meet the requirements of high rigidity and high toughness at the same time.
  • the lightweight technology of automobiles is becoming more and more attractive.
  • One of the trends in the lightweight of automobiles is the thinning of parts, which requires materials with high rigidity and high toughness to meet the application requirements of parts under external pressure and impact.
  • Another trend of automobile lightweight is the low density of materials, that is, the density of materials is reduced on the premise of ensuring the rigidity and toughness of materials.
  • the technical characteristics of automotive PP are mainly high rigidity (flexural modulus), high toughness (notched impact strength), and low density.
  • the purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a high-light-transmitting, lightweight polypropylene composite material.
  • the technical solution adopted in the present invention is: a high light-transmitting, lightweight polypropylene composite material, including the following components by weight: 50-90 parts of PP resin, 4-35 parts of toughening agent, filler 4 to 30 parts and 0.2 to 4 parts of additives; the PP resin is a PP rigid resin, and the PP resin is a 2 mm square plate with a light transmittance of not less than 55% PP resin; the two-dimensional filler in the filler is in The weight part in the polypropylene composite material is less than 10 parts; the light transmittance is tested according to the GB T 2410-2008 standard.
  • the PP resin is a PP resin with a light transmittance of a 2 mm square plate of not less than 65% and a flexural modulus of not less than 1200 MPa.
  • the toughening agent is a styrene elastomer.
  • Polyolefin elastomers have a certain difference in refractive index with PP, which causes a relatively large loss to the light transmittance of the product; the refractive index difference between styrene elastomers and PP is small, causing losses to the light transmittance of the product smaller. Therefore, styrene elastomer is selected for toughening, which can effectively toughen while maintaining the high light transmittance of the material.
  • the filler is a one-dimensional filler with an aspect ratio higher than 20:1 and a diameter lower than 2 ⁇ m.
  • talcum powder as a two-dimensional filler, during the injection molding process, due to the orientation of the shear force field, a large amount of talcum powder is arranged in parallel with the injection molding square plate, and the reflection of light is very obvious, thus affecting the light transmittance of the product.
  • the loss is relatively large; the one-dimensional filler represented by whiskers has a weak reflection effect on light and causes less loss to the light transmittance of the product.
  • one-dimensional fillers with high aspect ratio are selected, because of their high aspect ratio, the stiffening effect is significantly better than that of talc, and only half the amount of filler can be added to achieve similar mechanical properties, and the material density is significantly reduced. Therefore, one-dimensional fillers with high aspect ratio are selected for stiffening, which can maintain the high light transmittance of the material while increasing the stiffness, and at the same time achieve the effect of light weight.
  • the auxiliary agent is at least one of antioxidant, light stabilizer, lubricant, deodorant, and toner.
  • the adjuvants in this application can be specifically selected by those skilled in the art according to the actual situation.
  • the high-light-transmitting, lightweight polypropylene composite material comprises the following components in parts by weight: 50-80 parts of PP resin, 5-30 parts of toughening agent, 5-25 parts of filler and 0.4-2.5 parts of auxiliary agent share.
  • the present invention also provides a method for preparing the high-light-transmitting, lightweight polypropylene composite material, the method being:
  • the components are added into a high-speed mixer and mixed evenly, and then the mixed raw materials are added into a twin-screw extruder for melt extrusion, granulation, drying, cooling, and packaging to obtain the high-light-transmitting, lightweight polypropylene.
  • Composite material among them, the temperature of the twin-screw extruder is 170°C, 200°C, 200°C, 210°C, 210°C, 205°C, 205°C, 205°C, 200°C, 200°C from the feeding section to the head. .
  • the ingredients are added to a high-speed mixer and mixed for 1-3 minutes at a rotational speed of 200-300 rpm.
  • the present invention also provides an application of the high-light-transmitting, lightweight polypropylene composite material in automobile interior and exterior trim parts.
  • the present invention realizes the high light transmittance and rigidity balance of the resin system by selecting high light transmittance PP and high rigidity PP matrix;
  • a one-dimensional filler with a high aspect ratio and a low diameter is used to replace the traditional talc powder filler for rigidity modification. It can realize the technical integration of high light transmission and light weight (high rigidity, high toughness, low density);
  • the density was tested according to the ISO 1183-1 standard; the tensile properties were tested according to the ISO 527-2 standard, and the tensile speed was 50 mm/min; the flexural strength and flexural modulus were tested according to the ISO 178 standard , bending speed 2mm/min; Izod notch impact is tested according to ISO 180 standard; light transmittance is tested according to GB T 2410-2008 standard: Method A haze meter method is used to test the injection molded square plate (size 50mm* 50mm*2mm) light transmittance.
  • the grade is HJ 4045, produced by Daehan Petrochemical Co., Ltd., homopolymer PP, 2mm square plate with 75% light transmittance and 2000MPa flexural modulus;
  • PP-2 The grade is EP548R, China Overseas Shell Co., Ltd., copolymerized PP, 2mm square plate with a light transmittance of 51% and a flexural modulus of 1200MPa;
  • PP-3 grade MT25-S, copolymerized PP, light transmittance of 2mm square plate is 71%, flexural modulus is 1000MPa;
  • Polyolefin toughening agent ethylene octene-copolymer with a crystallinity of 13%;
  • Styrenic toughening agent styrene-ethylene-butylene-styrene block copolymer, with a styrene content of about 13%;
  • Talc powder a commercially available product with a particle size of 3000 mesh and a diameter-thickness ratio of about 15:1;
  • Whiskers a commercially available product with a diameter of about 1 ⁇ m and an aspect ratio of about 25:1;
  • Glass fiber a commercially available product with a diameter of about 13 ⁇ m and an aspect ratio of about 25:1 after processing.
  • the preparation method of polypropylene composite material is as follows:
  • twin-screw extrusion The temperature of the machine from the feeding section to the head is 170°C, 200°C, 200°C, 210°C, 210°C, 205°C, 205°C, 205°C, 200°C, 200°C.
  • the application sets Examples 1 to 7 and Comparative Examples 1 to 2.
  • the contents of each component of Examples 1 to 7 and Comparative Examples 1 to 2 are shown in Table 1; the performance test results are shown in Table 2;
  • the processing aids in Examples 1-7 and Comparative Examples 1-2 are: 0.2 part of main antioxidant, 0.2 part of auxiliary antioxidant, 0.2 part of light stabilizer, 0.2 part of lubricant, and 1 part of deodorant , 0.2 part of toner; the specific selection of each component can be conventionally selected by those skilled in the art according to actual needs.
  • the light transmittances of the 2 mm square plates of the composite materials obtained in Examples 1 to 7 of the present application are all not less than 40%, while the light transmittances of the 2 mm square plates of the materials in Comparative Examples 1 to 2 are all less than 30%.
  • the light transmittance of Examples 1 to 7 is significantly better than that of the comparative example.
  • Comparing Example 1 and Comparative Example 1 it can be seen that the PP resin in Comparative Example 1 is a PP resin with a light transmittance of a 2 mm square plate lower than 55%, and the light transmittance, flexural modulus, tensile strength of the obtained polypropylene composite material are , and the bending strength are inferior to those of Example 1.
  • Comparing Example 1 and Comparative Example 2 it can be seen that in Comparative Example 2, the weight portion of the two-dimensional filler talc powder used reaches 10 parts. Due to the orientation of the two-dimensional filler during the injection molding process, the shear force field acts on it, resulting in a large amount of talc.
  • Example 1 is an obviously excellent high light transmittance and lightweight polypropylene material; therefore, the light transmittance of the 2mm square plate of the PP resin should be higher than 55%, and the two-dimensional filler is filled with parts by weight. The number should be less than 10 servings.
  • Example 2 Comparing Example 2 with Example 1, although the light transmittance of the PP resin in Example 2 is higher, its flexural modulus is lower than 1200MPa; Less, the flexural modulus reduction caused by the toughening agent should also be less, but the flexural modulus of Example 2 is still significantly lower than that of Example 1 due to the low modulus of the PP resin itself.
  • Example 3 Compare Example 3 with Example 1, the elastomer selected in Example 3 is a polyolefin elastomer, and the light transmittance, tensile strength, flexural strength, and flexural modulus of the resulting composite material are all lower than those in Example 1;
  • Example 4 is compared with Example 1.
  • the diameter of the filler glass fiber selected in Example 4 is 13 ⁇ m, and the light transmittance, tensile strength, flexural strength and flexural modulus of the obtained composite material are all lower than those in Example 1.
  • Example 5 Comparing Example 5 and Example 1, the contents of toughening agent and filler in Example 5 are higher, the light transmittance of the obtained composite material is lower than that of Example 1, and the density is also higher than that of Example 1; For comparison in Example 2, due to the high filler content of Example 6, the light transmittance of the obtained composite material is lower than that of Example 2, and the density is higher than that of Example 2;
  • the obtained material has lower light transmittance and lower density, but its flexural modulus and impact strength are relatively small, and it is only suitable for some light-transmitting parts with relatively low mechanical properties, such as automobiles. Door trim, etc.
  • the preferred components by weight of the high light transmission and light weight polypropylene composite material are: 50-80 parts of PP resin, 5 parts of toughening agent ⁇ 30 parts, 5-25 parts of filler and 0.4-2.5 parts of auxiliary.

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  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
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  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

一种高透光、轻量化聚丙烯复合材料，包括如下重量份的成分：PP树脂50～90份、增韧剂4～35份、填料4～30份和助剂0.2～4份；所述PP树脂为PP刚性树脂，所述PP树脂为2mm方板透光率不低于55％的PP树脂，所述填料中的二维填料在所述聚丙烯复合材料中的重量份低于10份。通过选用高透光PP、高刚性PP基体和与PP折射率相近的苯乙烯类的弹性体，实现了树脂体系的高透光性和刚韧平衡；还公开一种高透光、轻量化聚丙烯复合材料的制备方法。

Description

一种高透光、轻量化聚丙烯复合材料及其制备方法 技术领域
本发明涉及高分子材料改性领域，尤其涉及一种高透光、轻量化聚丙烯复合材料及其制备方法。
背景技术
聚丙烯(PP)作为一种高性价比的通用塑料，通过增韧改性后具有较为优异的力学性能，成型加工简便，广泛应用于家电及汽车产品。
随着互联网技术和电子科技的发展，内外饰表面成为具有设计感的装饰表面，集装饰性与功能性于一体，这对车用材料提出了透光性的新需求。聚碳酸酯(PC)和聚甲基丙烯酸甲酯(PMMA)是两款传统的透明高分子材料。然而，PC的流动性较差，较难注塑大型制件，PMMA的韧性较差，无法满足很多制件的高韧性要求。传统的车用聚丙烯内外饰材料，通常由聚丙烯、弹性体、滑石粉等原材料经双螺杆挤出机等加工设备共混后制得。然而，这一传统方案会造成较大的光反射、光吸收和光散射问题。因此，尽管改性PP具有高流动性和高冲击的优点，但是传统的改性PP材料的透光性能并不高。
车用PP材料往往同时需要满足高刚性、高韧性要求。随着节能减排要求的提高以及电动汽车的发展，汽车的轻量化技术越来越引人注目。汽车轻量化的一个趋势是制件的薄壁化，这要求材料具有高刚性和高韧性，以满足制件在外部压力和撞击的的应用需求。汽车轻量化的另一个趋势是材料的低密度化，即在保障材料的刚性、韧性的前提下，降低材料的密度。为满足汽车轻量化需求，车用PP的技术特点主要表现为高刚性(弯曲模量)、高韧性(缺口冲击强度)、和低密度。
因此本领域尚需开发一种制备简单的高透光PP、轻量化(高刚性、高韧性、低密度)产品的方法。
发明内容
基于此，本发明的目的在于克服上述现有技术的不足之处而提供一种高透光、轻量化聚丙烯复合材料。
为实现上述目的，本发明所采取的技术方案为：一种高透光、轻量化聚丙烯复合材料，包括如下重量份的成分：PP树脂50～90份、增韧剂4～35份、填料4～30份和助剂0.2～4份；所述PP树脂为PP刚性树脂，所述PP树脂为2mm方板透光率不低于55％的PP树脂；所述填料中的二维填料在所述聚丙烯复合材料中的重量份低于10份；所述透光率按照GB T 2410-2008标准进行测试。
优选地，所述PP树脂为2mm方板透光率不低于65％、且弯曲模量不低于1200MPa的PP树脂。
优选地，所述增韧剂为苯乙烯类弹性体。
聚烯烃类弹性体因其与PP的折射率有一定差异，对产品的透光率造成损失比较大；苯乙烯类的弹性体与PP的折射率差异较小，对产品的透光率造成损失较小。因此选用以苯乙烯类弹性体进行增韧，可以在有效增韧的同时，保持材料的高透光率。
优选地，所述填料为长径比高于20：1、直径低于2μm的一维填料。
以滑石粉作为二维填料，在注塑过程中，由于剪切力场对其取向作用，造成大量的滑石粉与注塑方板呈平行排列，对光的反射十分明显，从而对产品的透光率造成损失比较大；以晶须为代表的一维填料，因其对光的反射作用较弱，对产品的透光率造成损失较小。另外，选择长径比较高的一维填料，因其长径比较高，增刚效果显著优于滑石粉，仅需添加一半的填料用量，即可达到类似的力学性能，材料密度明显降低。因此选用高长径比的一维填料进行增刚，可以在增刚的同时，保持材料的高透光率，同时还可实现轻量化的效果。
优选地，所述助剂为抗氧剂、光稳定剂、润滑剂、除味剂、色粉中的至少一种。本申请中的助剂，本领域技术人员可根据实际情况进行具体选择。
优选地，所述的高透光、轻量化聚丙烯复合材料，包含以下重量份的成分：PP树脂50～80份、增韧剂5～30份、填料5～25份和助剂0.4～2.5份。
同时，本发明还提供一种所述的高透光、轻量化聚丙烯复合材料的制备方法，所述方法为：
将各成分加入高混机中混合均匀，然后将混合好的原料加入双螺杆挤出机中进行熔融挤出、造粒、干燥、冷却、装包，得到所述高透光、轻量化聚丙烯复合材料；其中，双螺杆挤出机的温度从喂料段到机头依次为170℃、200℃、200℃、210℃、210℃、205℃、205℃、205℃、200℃、200℃。
优选地，将各成分加入高混机中，在转速为200-300rpm下混合1-3分钟。
此外，本发明还提供一种所述的高透光、轻量化聚丙烯复合材料在汽车内外饰部件中的应用。
相对于现有技术，本发明的有益效果为：
1)本发明通过选用高透光PP、高刚性PP基体，实现了树脂体系的高透光性和刚韧平衡；
2)本发明通过选用高长径比、低直径的一维填料替代传统的滑石粉填料进行增刚改性，高长径比有利于提升其增刚性能，低直径保障材料的透光性，可实现高透光和轻量化(高刚性、高韧性、低密度)的技术集成；
3)本发明所述原材料方便易得，所述生产工艺简单，适于大规模生产。
具体实施方式
为更好的说明本发明的目的、技术方案和优点，下面将结合具体实施例对本发明作进一步说明。以下实施例只是本发明的典型例，本发明的保护范围并不局限于此。以下实施例和对比例中，密度按照ISO 1183-1标准进行测试；拉伸性能按照ISO 527-2标准进行测试、拉伸速度为50mm/min；弯曲强度、弯曲模量按照ISO 178标准进行测试、弯曲速度2mm/min；悬臂梁缺口冲击按照ISO 180标准进行测试；透光率按照GB T 2410-2008标准进行测试：选用方法A雾度计法，测试各个样品的注塑方板(尺寸50mm*50mm*2mm)的透光率。
实施例和对比例中用到的主要代表材料如下：
PP-1：牌号为HJ 4045，大韩油化公司，均聚PP，2mm方板透光率75％，弯曲模量2000MPa；
PP-2：牌号为EP548R，中海壳牌公司，共聚PP，2mm方板透光率51％，弯曲模量为1200MPa；
PP-3：牌号MT25-S，共聚PP，2mm方板透光率71％，弯曲模量为1000MPa；
聚烯烃类增韧剂：乙烯辛烯-共聚物，结晶度为13％；
苯乙烯类增韧剂：苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物，苯乙烯含量约13％；
滑石粉：市售某产品，粒径3000目，径厚比约15:1；
晶须：市售某产品，直径约1μm，长径比约25:1；
玻纤：市售某产品，直径约13μm，加工后长径比约25:1。
聚丙烯复合材料的制备方法如下：
将各成分加入高混机中，200-300rpm下混合1-3分钟，然后将混合好的原料加入双螺杆挤出机中进行熔融挤出、造粒、干燥、冷却、装包；双螺杆挤出机的温度从喂料段到机头依次为170℃、200℃、200℃、210℃、210℃、205℃、205℃、205℃、200℃、200℃。
本申请设置实施例1～7及对比例1～2，实施例1～7及对比例1～2的各成分含量如表1所示；性能测试结果如表2所示；其中，以重量份计，实施例1～7及对比例1～2中的加工助剂为：主抗氧剂0.2份、辅抗氧剂0.2份、光稳定剂0.2份、润滑剂0.2份、除味剂1份、色粉0.2份；具体各成分选择本领域技术人员可根据实际需要进行常规选择即可。
表1实施例1～7和对比例1～2中的成分、含量
Figure PCTCN2020136308-appb-000001
Figure PCTCN2020136308-appb-000002
表2实施例1～7和对比例1～2中的性能数据
Figure PCTCN2020136308-appb-000003
可以看到，本申请实施例1～7中所得复合材料的2mm方板透光率均不低于40％，而对比例1～2中材料的2mm方板透光率均低于30％，实施例1～7的透光性显著优于对比例。
将实施例1和对比例1进行对比可知，对比例1中PP树脂为2mm方板透光率低于55％的PP树脂，所得聚丙烯复合材料的透光率、弯曲模量、拉伸强度、弯曲强度均差于实施例1。将实施例1和对比例2进行对比可知，对比例2中使用二维填料滑石粉的重量份达到10份，由于二维填料在注塑过程中，剪切力场对其取向作用，造成大量的滑石粉与注塑方板呈平行排列，对光的反射十分明显，从而对产品的透光率造成损失比较大；同时，由于实施例1所使用晶须的长径比较大，增刚效果较好，实施例1的弯曲模量也显著高于对比例2。相较于对比例1和对比例2，实施例1是明显优异的高透光、轻量化聚丙烯材料；故PP树脂的2mm方板透光率应高于55％，二维填料填充重量份数应低于10份。
将实施例2和实施例1做对比，虽然实施例2中PP树脂的透光率较高，但因其弯曲模量低于1200MPa；原则上，由于实施例2所采用使用的增韧剂含量更少，增韧剂造成的弯曲模量降低也应该更少，但是由于PP树脂本身模量过低，实施例2的弯曲模量仍显著低于实施例1。将实施例3和实施例1做对比，实施例3选用的弹性体为聚烯烃弹性体，所得复合材料的透光率、拉伸强度、弯曲强度、弯曲模量均比实施例1低；将实施例4和实施例1做对比，实施例4选用的填料玻纤的直径为13μm，其所得复合材料的透光率、拉伸强度、弯曲强度、弯曲模量均比实施例1低。
将实施例5和实施例1做对比，实施例5增韧剂、填料含量都较高，所得复合材料的透光率比实施例1低，密度也比实施例1高；实施例6与实施例2做对比，由于实施例6的填料含量较高，所得复合材料的透光率比实施例2低，密度比实施例2高；实施例7与实施例2相比，其所含增韧剂和填料分别更低，所得材料的透光率更高，密度更低，但是其弯曲模量和冲击强度均偏小，仅适用于一些力学性能要求相对低一些的透光制件，如汽车门饰条等。故综合考虑透光、轻量化以及汽车实际应用部件的力学需求，所述的高透光、轻量化聚丙烯复合材料，优选的重量份的成分为：PP树脂50～80份、增韧剂5～30份、填料5～25份和助剂0.4～2.5份。
最后所应当说明的是，以上实施例仅用以说明本发明的技术方案而非对本发明保护范围的限制，尽管参照较佳实施例对本发明作了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的实质和范围。

Claims (9)

  1. 一种高透光、轻量化聚丙烯复合材料，其特征在于，包括如下重量份的成分：PP树脂50～90份、增韧剂4～35份、填料4～30份和助剂0.2～4份；所述PP树脂为PP刚性树脂，所述PP树脂为2mm方板透光率不低于55％的PP树脂；所述填料中的二维填料在所述聚丙烯复合材料中的重量份低于10份；所述透光率按照GB T 2410-2008标准进行测试。
  2. 如权利要求1所述的高透光、轻量化聚丙烯复合材料，其特征在于，所述PP树脂为2mm方板透光率不低于65％、且弯曲模量不低于1200MPa的PP树脂。
  3. 如权利要求1所述的高透光、轻量化聚丙烯复合材料，其特征在于，所述增韧剂为苯乙烯类弹性体。
  4. 如权利要求1所述的高透光、轻量化聚丙烯复合材料，其特征在于，所述填料为长径比高于20：1、直径低于2μm的一维填料。
  5. 如权利要求1所述的高透光、轻量化聚丙烯复合材料，其特征在于，所述助剂为抗氧剂、光稳定剂、润滑剂、除味剂、色粉中的至少一种。
  6. 如权利要求1所述的高透光、轻量化聚丙烯复合材料，其特征在于，包含以下重量份的成分：PP树脂50～80份、增韧剂5～30份、填料5～20份和助剂0.4-2.5份。
  7. 一种如权利要求1～6任一项所述的高透光、轻量化聚丙烯复合材料的制备方法，其特征在于，所述方法为：
    将各成分加入高混机中混合均匀，然后将混合好的原料加入双螺杆挤出机中进行熔融挤出、造粒、干燥、冷却、装包，得到所述高透光、轻量化聚丙烯复合材料；其中，双螺杆挤出机的温度从喂料段到机头依次为170℃、200℃、200℃、210℃、210℃、205℃、205℃、205℃、200℃、200℃。
  8. 如权利要求7所述的高透光、轻量化聚丙烯复合材料的制备方法，其特征在于，将各成分加入高混机中，在转速为200-300rpm下混合1-3分钟。
  9. 一种如权利要求1～6任一项所述的高透光、轻量化聚丙烯复合材料在汽车内外饰部件中的应用。
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