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Moldable high-performance thermoplastic composite material with single fiber length distribution
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A fiber length, composite material technology, used in household components, applications, household appliances, etc., to achieve the effect of single fiber retention length distribution, wide fiber length distribution, and obvious mechanical properties
Active Publication Date: 2021-05-25
GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV
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Problems solved by technology
Although compared with other molding methods, the fiber length loss of this processing method is small, but the fibers are also sheared and broken by the screw extruder.
Method used
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Embodiment 1
[0032] A moldable high-performance thermoplastic composite material with single fiber length distribution comprises the following components in parts by weight: 50 parts of glass fiber filaments; 50 parts of resin.
[0033] This embodiment adopts 2400tex glass fiberyarn, the resin is polypropylene, the melt index is 25g / 10min, the mass fraction of glass fiber is 50±5wt%, the length of LFT-G particles is 25mm, and it is made into 4mm after fully heating at 230°C. The LFT-G plate is molded after being heated and baked at 230° C. to obtain a product.
[0034] The obtained parts were tested for tensile strength, bending strength and fiber length. The tensile strength was 240MPa, the bending strength was 175MPa, and the fiber length was 25mm, which was consistent with the fiber length of LFT-G particles. resulting in loss of fiber length.
Embodiment 2
[0036] A moldable high-performance thermoplastic composite material with single fiber length distribution comprises the following components in parts by weight: 50 parts of glass fiber filaments; 50 parts of resin.
[0037] This embodiment adopts 2400tex glass fiber filaments, the resin is polypropylene, the melt index is 25g / 10min, the glass fiber mass fraction is 50±5wt%, the LFT-G particle length is 15mm, and it is made into 4mm after fully heating at 230°C. The LFT-G plate is molded after being heated and baked at 230° C. to obtain a product.
[0038] The obtained parts were tested for tensile strength, bending strength and fiber length. The tensile strength was 230MPa, the bending strength was 160MPa, and the fiber length was 15mm, which was consistent with the fiber length of LFT-G particles. resulting in loss of fiber length.
Embodiment 3
[0040] A moldable high-performance thermoplastic composite material with single fiber length distribution comprises the following components in parts by weight: 50 parts of glass fiber filaments; 50 parts of resin.
[0041] This embodiment adopts 2400tex glass fiber yarn, the resin is polypropylene, the melt index is 25g / 10min, the mass fraction of glass fiber is 50±5wt%, the length of LFT-G particles is 10mm and 20mm, accounting for 50% each, at 230°C After being fully heated under high temperature, a 4mm LFT-G plate is made, and the plate is heated and baked at 230°C, and then molded to obtain a product.
[0042] The obtained parts were tested for tensile strength, bending strength and fiber length. The tensile strength was 215MPa, the bending strength was 165MPa, and there were two fiber lengths of 10mm and 20mm, which were consistent with the fiber length of LFT-G particles. Processing did not result in loss of fiber length.
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Abstract
The invention provides a moldable high-performance thermoplasticcomposite material with single fiberlength distribution. The moldable high-performance thermoplasticcomposite material comprises the following components: 25-75 parts of glass fiber filaments; and 25 to 75 parts of resin. The process route and the final material have the advantages that compared with a traditional LFT material, the length of the reinforced fiber can be not damaged, the length distribution of the fiber is single, the length of the fiber in the original LFT-G particles is completely reserved, the mechanical propertyadvantage of the fibers can be exerted to the maximum extent. The single fiber reserved length distribution generally refers to fibers with one length value, or fibers with two or more than two length values, but preferably not more than five length values, and a mixture of excessive LFT-G particles with different lengths will deteriorate the cost of the product involved in the invention, which should be avoided. Even if the composite material with a plurality of fiber reserved length values is produced by the method, the composite material is obviously different from the traditional LFT composite material in the aspect of wider reserved fiber length distribution, and has the advantage of obvious mechanical properties.
Description
technical field [0001] The invention relates to the technical field of polypropylene composite materials, in particular to a moldable high-performance thermoplastic composite material with single fiber length distribution. Background technique [0002] The fiber retention length in short fiber reinforced thermoplastic (SFT) products is generally <1mm, while the fiber retention length in long fiber reinforced thermoplastic (LFT) products is generally <10mm, and the fiber length distribution is wide, at 10 -1 to 10 1 between mm. Compared with short-fiber-reinforced thermoplastic composite materials, long-fiber-reinforced thermoplastic materials have the following advantages: longer fiber length, which can significantly improve the mechanical properties of the product, improve creep resistance, good dimensional stability, and high part forming accuracy; specific stiffness It has high specific strength, good impact resistance, and can mold large and complex parts with go...
Claims
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Application Information
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