▎ 摘　　要

NOVELTY - Improving shore hardness of sound insulation cotton comprises (a) weaving lightweight metal fibers that make up light metal mesh layer (3), weaving hollow metal fibers that make up hollow metal mesh layer (6), (b) inlaying by opening multiple square grooves on foam plastic layer, inserting suitable elastic reinforcing ribs (10) in square grooves, attaching orthogonally woven hollow metal mesh layer (6) to surfaces of foam plastic layer, (c) filling by drilling elastic layer (5) to obtain sound insulation channel (11), filling sound insulation channel with light metal fibers that form light metal mesh layer, (d) opening vacuum soundproof cavity inside soft resin layer, (e) boarding by laying mixed fibers of mixed fiber layer neatly and heat-pressing mixed fiber layer, (f) pressing plates, cooling down to room temperature to obtain sound insulation cotton layer and (g) edge banding by attaching anti-aging film to sides of sound-absorbing cotton layer, heat sealing edges and edge banding. USE - The method is useful for improving shore hardness of sound insulation cotton. ADVANTAGE - The sound insulation cotton has good market potential value and application prospects. DETAILED DESCRIPTION - Improving shore hardness of sound insulation cotton comprises (a) weaving by orthogonally weaving lightweight metal fibers that make up light metal mesh layer (3) to ensure the porosity of light metal mesh layer after weaving is 0.2-0.5, orthogonally weaving hollow metal fibers that make up hollow metal mesh layer (6) to ensure that the porosity of the lightweight metal mesh layer after weaving is 0.3-0.8, (b) inlaying by opening multiple square grooves on the foam plastic layer, inserting suitable elastic reinforcing ribs (10) in the square grooves, attaching the orthogonally woven hollow metal mesh layer (6) to the upper and lower surfaces of the foam plastic layer, (c) filling by drilling elastic layer (5) to obtain sound insulation channel (11), filling sound insulation channel with light metal fibers that form light metal mesh layer to ensure that the light metal fiber penetrates the elastic layer, (d) embedding by opening vacuum soundproof cavity inside soft resin layer, where the vacuum soundproof chamber does not penetrate the soft resin layer, filling mixed fiber into vacuum soundproof cavity inside soft resin ply and sealing vacuum soundproof chamber after filling, (e) boarding by laying mixed fibers of the mixed fiber layer neatly and heat-pressing mixed fiber layer at 180-200 degrees C for 10-30 minutes via hot press to obtain mixed fiber layer with thickness of 0.8-1.5 cm, applying force to press thickness of the mixed fiber layer to 0.3-0.5cm, (f) pressing plate by combining mixed fiber layer, light metal mesh layer, soft resin plate layer, elastic layer, hollow metal mesh layer and foam plastic layer, applying small amount of adhesive to middle of joints of each layer, heat-pressing at 60-90 degrees C for 10-30 minutes via hot press, cooling down to room temperature to obtain sound insulation cotton layer and (g) edge banding by attaching anti-aging film to both sides of the sound-absorbing cotton layer, where the side length of the anti-aging film is greater than the side length of the sound-absorbing cotton layer, aligning anti-aging films on both sides of the sound-absorbing cotton layer and heat sealing edges at 150-250 degrees C, edge banding to obtain high-Shore sound insulation cotton. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the high-shore sound insulation cotton. Light metal mesh layer (3) Drilling elastic layer (5) Woven hollow metal mesh layer (6) Elastic reinforcing rib (10) Sound insulation channel (11)