Low-VOC and low-migration polypropylene composite material and preparation method thereof
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A composite material and polypropylene technology, applied in the field of modified materials, can solve problems such as hidden dangers, poor VOC removal, short mixing time, etc., and achieve the effects of small addition, good compatibility, and low migration
Active Publication Date: 2017-08-01
HEFEI GENIUS NEW MATERIALS
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[0003] Patent CN101691435B prepares a low-VOC high-performance PP composite material for automotive interior parts by selecting low-VOC hydrogen-tuned polypropylene, but it limits the application of polypropylene materials and is not conducive to the elimination of VOC generated during the preparation process
Patent CN101817953B adds an inorganic porous odor adsorbent to prepare a low-emission modified polypropylene composite material, but this method has analysis and balance problems and is not conducive to the elimination of VOC
Patent CN101255252B discloses a low-emission special material for automotive interiors, using low-molecular-weight carbonates as organic repellants, but it is difficult to be ...
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Embodiment 1
[0024] Add 40 parts of copolymerized polypropylene, 45 parts of homopolypropylene, 5 parts of low-density polyethylene, 10 parts of inorganic filler wollastonite, 0.05 parts of vitamin E-type composite heat stabilizer and 0.1 part of titanium dioxide light stabilizer Mix in a high mixer with a temperature of 60°C for 5 minutes;
[0025] The blend after the above raw materials are uniformly mixed is extruded and granulated by a twin-screw extruder. °C, 180 °C, 180 °C, 180 °C, 180 °C, 185 °C, the length-to-diameter ratio of the extrusion screw is 40, and the rotation speed of the extrusion screw is 350 rpm.
Embodiment 2
[0027] Add 72 parts of homopolypropylene, 8 parts of linear low-density polyethylene, 20 parts of inorganic filler fly ash, 0.05-0.1 part of vitamin E-type composite heat stabilizer and 0.05-0.1 part of titanium dioxide-based light stabilizer, and add them together to the temperature Mix in a high mixer at 50°C for 10 minutes;
[0028] The blend after the above raw materials are uniformly mixed is extruded and granulated by a twin-screw extruder. °C, 190 °C, 190 °C, 195 °C, 195 °C, 200 °C, the length-to-diameter ratio of the extrusion screw is 36, and the rotation speed of the extrusion screw is 350 rpm.
Embodiment 3
[0030] 67 parts of copolymerized polypropylene, 5 parts of low-density polyethylene, 2 parts of linear low-density polyethylene, 10 parts of inorganic filler talc, 15 parts of calcium carbonate, 0.05-0.1 parts of vitamin E-type composite heat stabilizer and titanium dioxide-based light Stabilizer 0.05-0.1 part, add together at 40°C, mix in high mixer for 15 minutes;
[0031] The blend after the above raw materials are uniformly mixed is extruded and granulated through a twin-screw extruder. °C, 185 °C, 185 °C, 200 °C, 200 °C, 195 °C, the length-to-diameter ratio of the extrusion screw is 40, and the rotation speed of the extrusion screw is 350 rpm.
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Abstract
The invention discloses a low-VOC and low-migration polypropylene composite material and a preparation method thereof. The low-VOC and low-migration polypropylene composite material is prepared from 45 to 85 parts of polypropylene, 5 to 10 parts of polyethylene, 10 to 45 parts of inorganic filler, 0.05 to 0.1 part of vitamin E-type compound heat stabilizer and 0.05 to 0.1 part of titanium dioxide light stabilizer. The raw materials are mixed, extruded and granulated to be prepared into the low-VOC and low-migration polypropylene composite material. According to the low-VOC and low-migration polypropylene composite material disclosed by the invention, the green and environment-friendly aids of the vitamin E-type compound thermal stabilizer and the titanium dioxide light stabilizer are utilized to modify the polypropylene, and have small adding amount, good compatibility with a base material and no precipitation; thus, the prepared composite material has the characteristics of low VOC, low migration and the like, and can be applied to automotive trim materials of instrument boards, door boards, stand columns and the like of automobiles.
Description
technical field [0001] The invention relates to the technical field of modified materials, in particular to a low-VOC, low-migration polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (referred to as PP) has the advantages of excellent mechanical properties, low density, good heat resistance, excellent bending fatigue resistance, chemical stability and electrical properties, and is one of the most widely used general-purpose plastics. Because of its good physical and mechanical properties and processing properties, it is widely used in automotive interior parts, including main and auxiliary instrument panels, door panels and pillars. However, polypropylene modified materials will produce volatile organic substances (VOC) such as benzene, aldehydes and amines during the synthesis of raw materials, processing and aging, which are harmful to human health. Therefore, in order to reduce the VOC content in special materi...
Claims
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