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To produce the parts, a total weight of 400 g (LMDPE and treated or untreated fiber [UF] mixture) was dispersed by dry-blending using an industrial blender (JR Torrey PL 12) for 7 min.
As expected, because agave fiber cell wall density (1.28-1.51 g/[cm.sup.3]) is higher than LMDPE (0.93 g/[cm.sup.3]), UF composite density is higher than neat LMDPE.
(20) made a comparison between different processing techniques (compression molding and rotational molding) and blending methods (melt and dry) on the properties of LMDPE reinforced with wood particles (sawdust residues from wood processing).
The resin used in this study was linear medium density polyethylene (LMDPE) in a powder form: RO 93650 from Polimeros Nacionales (Mexico).
The first layer was produced adding 270 g of a blend of LMDPE with 0, 5, 10, or 15 wt% agave fiber blend into the mold.
Blending of agave fibers with LMDPE was done by simple dry mixing of the powders in a S-blade Fornado T-10 mixer for 5 min.
In all cases, a weight of 450 g of material (mixture of fiber and LMDPE) was loaded into the mold to produce parts with an approximate wall thickness of 3.2 mm.
To differentiate between the LMDPE powders different colors such as red, blue, white, and yellow were used.
In this work, all the LMDPE powders used are assumed to have the same physical properties, only color and size are different as described next.
Three types of reinforcements, glass beads, A[l.sub.2][O.sub.3] and SiC, were used in different volume fractions as reinforcements with LMDPE as the base matrix.
Five high-density polyethylene (HDPE)/linear medium density polyethylene (LMDPE) binary blends have been investigated in this work.
The ratio between HDPE and LMDPE for the different extruded samples was selected in order to obtain a resin with reasonable SCG resistance and suitable processability and stiffness values.
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