The effects of different content of halloysite(HNT)on the density and mechanical properties of glass fiber/hol-low glass spheres/nlyon 66 GF/HGS/PA66 composites were investigated by adding halloysite into the composites. The re-sults show that adding 3wt％ halloysite to GF/HGS/PA66 composite has the best mechanical strengthening effect. Com-pared with hollow glass spheres alone, the density of the composite increases by only 3.0％, but the flexural strength, flexural modulus, tensile strength and notched impact strength increase by 14.5％,17.0％,9.4％ and 31.9％,respectively.
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