Long glass fiber reinforced polypropylene composite material with low shrinkage and low warpage, its preparation method and application
A technology of composite materials and polypropylene, which is applied in the application field of long glass fiber reinforced polypropylene composite materials and its preparation, and the manufacture of automobile tailgate panels. It can solve problems such as no better solutions, and achieve good appearance and low cost The effect of warpage and good mechanical properties
Active Publication Date: 2019-08-13
CGN JUNER NEW MATERIALS +1
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Problems solved by technology
[0007] Therefore, there is still no good solution to the shrinkage and warpage of glass fiber reinforced modified polypropylene materials.
Method used
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Embodiment 1～4 and comparative example 1～4
[0042] Low shrinkage, low warpage and long glass fiber reinforced polypropylene composite materials, the raw material ratios of Examples 1-4 and Comparative Examples 1-4 are listed in Table 1 and Table 2 below, unless otherwise specified, the percentages refer to Percentage by weight, zinc oxide whisker adopts four-needle zinc oxide whisker, the length of the needle is 10-50 μm, the root of the needle is 0.5-5 μm, the aspect ratio is 20-50, and the apparent density is 0.2±0.1g / cm 3 , real density 5.4±0.2g / cm 3, heat resistance 800~1800℃; glass microspheres are hollow glass microspheres with a density of 0.2g / cm 3 ~0.7g / cm 3 , The particle size distribution is between 5 and 35 microns.
[0043] A method for preparing a low shrinkage, low warpage long glass fiber reinforced polypropylene composite material, comprising the following steps:
[0044] (1) drying the zinc oxide whiskers at 80° C. for 4 hours to obtain dried zinc oxide whiskers;
[0045] (2) Mix polypropylene, c...
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Abstract
The invention discloses a long glass fiber enhanced polypropylene composite material with low shrinkage and low warpage, a preparation method thereof, and application of the long glass fiber enhanced polypropylene composite material in manufacturing an automobile tail door sheet. The composite material is prepared from the following raw materials in parts by weight: 30-80% of polypropylene, 10-60% of continuous glass fiber, 3-10% of compatilizer, 0.1-1.5% of antioxidant, 0.1-1% of lubricating agent, 0.5-3% of coupling reagent, 0.1-2% of nucleating agent, 5-20% of zinc oxide whisker and 0.5-3% of glass bead. The zinc oxide whisker, the nucleating agent and the glass bead are compounded, so that the composite material achieves an ideal enhancement effect, the differential degree of glass fiber along a fiber glass orientation between a flowing direction and a vertical flowing direction in a polypropylene matrix is reduced, and the shrinking percentage and the warping degree of the composite material can be obviously lowered. The long glass fiber enhanced polypropylene composite material can be used for manufacturing the automobile tail door sheet.
Description
technical field [0001] The invention relates to the technical field of polypropylene composite materials, in particular to a long glass fiber reinforced polypropylene composite material with low shrinkage and low warpage, its preparation method and its application in manufacturing automobile tailgate panels. Background technique [0002] With the rapid development of the national economy, high-performance, low-cost thermoplastic resin-based composite materials have been widely used. It is an effective shortcut for the development of new materials to prepare fiber-reinforced thermoplastic resin-based composites (new structural composites, functional composites, etc.) by adding reinforcing fibers to thermoplastic resins and modifying the resins. This has become the consensus of the scientific and technological circles and the industry circles, and it is also the best technical route to realize the engineering of general-purpose plastics, the functionalization of engineering pl...
Claims
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IPC IPC(8): C08L23/12C08L23/14C08L51/06C08K13/04C08K7/14C08K7/08C08K7/28C08K5/523B29B9/06B29C48/92
CPCB29B9/06B29C48/92B29C2948/9258B29C2948/92704C08L23/12C08L23/14C08L2205/03C08L2205/08C08L2205/24C08L2205/242C08L51/06C08K13/04C08K7/14C08K7/08C08K7/28C08K5/523
Inventor郑云磊孙心克宋玉兴陈永波孙应郑京连李俊安孝善张景中
OwnerCGN JUNER NEW MATERIALS