Series of low density polyethylene (LDPE) films filled with different fillers such as silica, mica, soya protein isolate, potassium permanganate, and alumina were processed using a single screw extruder. The filled LDPE films were characterized for physicomechanical properties like tensile strength, percentage elongation at break, and tear strength, optical properties like percent transmission and haze. The barrier properties such as water vapor transmission rate and oxygen transmission rate of the filled LDPE films have also been reported. Microcrystalline parameters such as crystal size (͗N͘) and lattice distortion (g) of the filled LDPE films obtained using wide angle X-Ray scattering method have been reported.

The mechanical, optical and electrical properties of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE) films with and without fillers have been studied. The variation of properties resulting from the addition of inorganic fillers included an increase in haze, diffusion of light, and tear strength for films made with both LDPE and LLDPE, while increasing the burst strength and elongation of the LDPE films only. The tensile strength, melt flow rate, and usually the seal strength were decreased with the addition of fillers. The coefficient of friction (COF) was decreased when silica or commercial grade mica were added to both LDPE and LLDPE films.