1. An acoustic insulation felt for a building material, comprising a nonwoven fabric felt having a porous structure, wherein the nonwoven fabric felt is formed by interlacing a plurality of long fibers in a three-dimensional direction, the long fibers are drawn into filaments before forming the nonwoven fabric, and the draw ratio of the long fibers is 16 to 20.

2. The deadening felt for building material as set forth in claim 1, wherein the long fibers include sheath fibers and core fibers within the sheath fibers.

3. The deadening felt for building material according to claim 2, wherein the melting point of the sheath fiber is lower than the melting point of the core fiber.

4. The soundproof felt for construction material according to claim 3, wherein the long fibers are crossed in plane by heating to form a web, and the long fibers are crossed through the two webs by needling to form a porous structure of three-dimensional space between the two webs.

5. The deadening felt for building material according to any one of claims 2 to 4, wherein the long fibers are PET long fibers.

6. The deadening felt for building material according to claim 5, wherein the application of the deadening felt to the building material includes a wall, a ceiling, a pipe, and a mechanical device.

Background

Building sound insulation materials are mainly classified into the following categories: porous materials, which are the most commonly used materials in engineering, for example: mineral wool, glass wool, foam, felt, perlite, etc.; plate-like materials, example: plywood, asbestos cement board, gypsum board, hard board, etc.; shaped ceiling acoustical panels, examples: mineral wool acoustic boards, glass wool acoustic boards, soft fiber boards; film-like materials, examples: plastic films, canvas, artificial leather; leather flexible material, examples: sponge, latex block.

However, although the existing building sound insulation material has a certain sound insulation effect, the sound insulation effect is not good enough, the ageing resistance of the material is not good, and the problem of brittleness is easy to occur.

Disclosure of Invention

The invention aims to provide a sound-proof felt for building materials, which is used for realizing the technical effects of better sound-proof effect and good ageing resistance.

The invention is realized by the following technical scheme: a soundproof felt for a building material, comprising a nonwoven felt having a porous structure, the nonwoven felt being formed by interlacing a plurality of long fibers in a three-dimensional direction, the long fibers being drawn into filaments before forming the nonwoven fabric, the long fibers being drawn at a draw ratio of 16 to 20.

The non-woven fabric felt with the three-dimensional porous structure can achieve a good sound insulation effect, when sound waves are transmitted inside the non-woven fabric felt, the porous structure forms a cavity to eliminate the sound waves, and the stretched fibers have high ageing resistance.

To better achieve the present invention, further, the long fibers include sheath fibers and core fibers within the sheath fibers.

To better implement the present invention, further, the melting point of the sheath fiber is lower than that of the core fiber.

In order to better realize the invention, the long fibers are further heated to form a fiber net in a crossed manner in a plane, and then the long fibers are crossed through the two fiber nets by needling, so that a porous structure with three-dimensional space is formed between the two fiber nets.

In order to better implement the invention, further, the long fibers are PET long fibers.

In order to better implement the invention, further, the application of the soundproof felt in the building material comprises a wall body, a ceiling, a pipeline and mechanical equipment.

The invention has the beneficial effects that:

1. the non-woven fabric of the soundproof felt has a three-dimensional porous structure in the internal structure, so that the soundproof felt can eliminate sound in the porous structure, and a soundproof effect is achieved.

2. The long fibers of the non-woven fabric felt have strong ageing resistance after being stretched, so that the sound insulation material is not easy to be fragile.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings that are required to be used in the present invention will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and it will be apparent to those skilled in the art that other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic view of a non-woven felt structure provided by the present invention;

FIG. 2 is a view showing the internal structure of the nonwoven felt according to the present invention;

FIG. 3 is a graph comparing the sound absorption performance of three fibers provided by the present invention;

FIG. 4 is a graph of the aging resistance test provided by the present invention.

Detailed Description

The technical solution of the present invention will be described below with reference to the accompanying drawings.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 4, an acoustic insulation blanket for building materials includes a non-woven fabric blanket having a porous structure, as shown in fig. 1 and 2, the non-woven fabric blanket is formed by interweaving a plurality of long fibers in a three-dimensional direction, the three-dimensional porous structure may be ordered or disordered, such as a honeycomb, a cardiovascular structure, a cellular structure, etc., the three-dimensional porous structure can effectively block sound transmission, and achieve a good acoustic insulation effect, the long fibers are stretched into filaments before the non-woven fabric is formed, the stretching ratio of the long fibers is 16 to 20, and the reasonably stretched fibers have aging resistance.

According to practical preference, the long fiber comprises sheath fiber and core fiber in the sheath fiber, and further preferably, the melting point of the sheath fiber is lower than that of the core fiber, so that the low-melting-point fiber can be bonded together through the molten sheath fiber.

In this embodiment, as shown in fig. 1 and 2, the filaments are cross-hatched in a plane by heating to form a web with holes, heating the crossed long fibers to melt the sheath fibers of the long fibers first to form bonding between the two long fibers, so that the fibers crossed on the xy-axis plane form a fiber web with holes, preferably, the heating temperature is just enough to melt the fibers of the skin layer, so as to ensure that the fibers of the core layer are not melted, and then long fibers are penetrated through the two fiber webs in a staggered way by needling, namely, a plurality of long fibers are crossed into a net in a multi-level mode in the z-axis direction of the two layers of fiber nets, and the three-dimensional meshes in the z-axis direction can be orderly or disorderly arranged, so that a three-dimensional porous structure is formed between the two layers of fiber nets, when sound passes through such a porous structure, the sound waves are gradually eliminated by the holes between the gaps, and the multi-layer holes have a greater effect on eliminating sound.

Preferably, the long fiber is a PET long fiber, and as mentioned above, the application of the soundproof felt in building materials includes materials requiring sound insulation, such as walls, ceilings, pipelines, mechanical equipment, and the like.

Figure 3 is the performance of three kinds of fibre products on inhaling the sound performance through acoustics experiment, and the yellow line is the PET fibre, and the blue line is the foam, and the purple line is the polypropylene glass fibre, can see that the sound effect of inhaling among the sound performance of three kinds of fibre products is the foam and PET fibre that sound effect is the best, and the PET fibre adds three-dimensional porous structure and makes the syllable-dividing effect of this product better.

FIG. 4 shows the product passing DIN EN ISO 6603-2: according to the result about the anti-aging performance tested by the 2002 standard, the thickness of the selected sample is 2mm, and the product successfully passes the test and reaches the anti-aging standard.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.