Laminating 3D (three-dimensional) sound absorber and preparation method thereof

Abstract

The invention discloses a laminating 3D (three-dimensional) sound absorber and a preparation method thereof. The laminating 3D sound absorber comprises a covering layer, a first polyester staple fiber mesh layer and a fiber cotton layer which are sequentially compounded, needled holes are uniformly distributed in the surface of the fiber cotton layer, the hole diameter of each needled hole is not larger than 2mm, the depth of each needled hole is larger than two thirds of the thickness of the fiber cotton layer, and needling density is 1.0 needle / cm<2>-1.5 needles / cm<2>. Recyclable polyester fibers are used as raw materials and do not contain harmful substances, the harmful substances cannot be released, the materials can be recycled, and fiber cotton and coverings are adhered together through molten first polyester staple fibers. After the laminating 3D sound absorber is attached onto a wall, a cavity can be formed by the laminating 3D sound absorber and the wall, keels are omitted, and vibration transfer of sound is decreased, so that sound absorption and noise reduction effects are preferably achieved. The laminating 3D sound absorber is fine in sound absorption effect, and particularly, low-frequency sound absorption effects are obviously improved.

Description

technical field [0001] The invention relates to a film-coated 3D sound absorbing body and a preparation method thereof, belonging to the field of building materials components and construction. Background technique [0002] Space sound absorbers can have various shapes such as plate, square, cylinder, cone and sphere according to the use nature, area, floor height, structural form, decoration requirements and sound source characteristics of the building. Among them, the plate-shaped structure is the simplest and the most widely used. [0003] The forming structure of the existing sound absorbing body is relatively complicated, and there are many influences of construction and acoustic effects. The appearance effect of the sound absorbing body is relatively monotonous, and cannot play a decorative effect. The effect of low-frequency sound absorption is not very obvious, and the production process is complicated. , requires multiple processes to complete. SUMMARY OF THE INV...

AI Technical Summary

Problems solved by technology

[0003] The forming structure of the existing sound-absorbing body is relatively complicated, and there are many influences on construction and acoustic effects. The appearance of the sound-absorbing body is relatively monotonous and cannot play a decorative effect. The effect in low-frequency sound absorption is not obvious, and the production process is complicated. , requires multiple processes to complete

Images