The invention discloses high-strength and high-contact area double-layer composite
fuel filter paper and a preparation method thereof. The high-strength and high-contact area double-layer composite
fuel filter paper is characterized by being prepared from the following raw materials in parts by weight: 3 to 5 parts of glass fibers, 10 to 20 parts of
hardwood pulp fibers, 3 to 5 parts of
polypropylene fibers, 10 to 20 parts of coniferous
pine wood pulp fibers, 10 to 20 parts of
polyester fibers, 10 to 20 parts of
sepiolite nano fibers, 2 to 4 parts of white
carbon black, 3 to 5 parts of Fe2O3, 5 to 10 parts of TiO2, 4 to 8 parts of MgO, 25 to 35 parts of a
silane coupling agent KH560, 15 to 20 parts of a polyoxyethylene
aqueous solution, 2 to 4 parts of a
titanate coupling agent DNZ201, 50 to 60 parts of isopropanol, 5 to 10 parts of
styrene-acrylic
emulsion and a proper amount of polyacrylate
emulsion. According to the high-strength and high-contact area double-layer composite
fuel filter paper, a gap between one layer and the other layer is improved; furthermore, the obvious
porosity gradient is retained, and the filter efficiency is improved; the
filter paper is subjected to crumbling treatment, so that the contact area of fuel and the
filter paper is enlarged, and the filter efficiency is further improved; by the cooperated adding of the
polypropylene fibers and the glass fibers, the strength of the fuel
filter paper is enhanced.