A hot-melt adhesive film multi-layer hollow glass bead sound reflection cloth and its manufacturing method

Abstract

The present invention provides a hot melt adhesive film multi-layer hollow glass microsphere acoustic reflection cloth and a manufacturing method thereof, belonging to the technical field of underwater acoustic materials. It solves the problems that it is difficult to ensure the thickness uniformity of the coated hollow glass microsphere layer and the relatively low volume proportion of the hollow glass microspheres. It includes laying a hot melt adhesive film flat on the base film, evenly scattering hollow glass microspheres on the upper surface of the hot melt adhesive film, laying a layer of release paper flat on the upper surface of the hollow glass microsphere layer and then hot pressing with a hot press, and repeating the above steps to meet the thickness requirement. Then, the upper and lower surfaces of the material after the above steps are reversed so that the base film is at the top, and the hollow glass microsphere layer is repeatedly pasted. The present invention manufactures a multi-layer acoustic reflection cloth by a method of layered pressing and melting bonding, and the thickness of the acoustic reflection cloth is uniformly controllable and has good thickness uniformity.

Description

Technical Field

[0001] The present invention belongs to the technical field of underwater acoustic materials, and particularly relates to a hot-melt adhesive film multi-layer hollow glass microsphere acoustic reflection cloth and a manufacturing method thereof. Background Art

[0002] Underwater strong reflection acoustic materials are underwater acoustic materials that enhance the sound wave reflection ability. Traditional acoustic reflection materials or structures are generally metal plates or metal cavity structures with an air interlayer in the middle. Such metal materials have rigid characteristics and cannot change their shapes after being formed once.

[0003] Chinese Patent CN202110634413.5 discloses a bendable and foldable hollow glass microsphere sandwich-type flexible acoustic reflection structure and its application, and designs a flexible acoustic reflection structure with hollow glass microspheres coated between two flexible films. This structure has strong reflection ability and also has the characteristics of flexible variable shape. However, the method of coating hollow glass microspheres between two flexible films has high requirements for the coating process, and it is difficult to ensure the thickness uniformity of the coating; in addition, the coating method requires mixing hollow glass microspheres in glue, resulting in a low volume ratio of hollow glass microspheres in the mixture, so the acoustic reflection ability of the coating layer will be reduced. Summary of the Invention

[0004] In view of this, in order to solve the problems of difficult to ensure the thickness uniformity of the coated hollow glass microsphere layer and low volume ratio of hollow glass microspheres mentioned in the above background art, the present invention proposes a hot-melt adhesive film multi-layer hollow glass microsphere acoustic reflection cloth and a manufacturing method thereof.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A hot-melt adhesive film multi-layer hollow glass microsphere acoustic reflection cloth, specifically including the following steps:

[0006] The first step: Lay the base film flat on the silicone pad of the hot press, and then lay the hot-melt adhesive film flat on the base film;

[0007] The second step: Evenly sprinkle the hollow glass microspheres on the upper surface of the hot-melt adhesive film, and the sprinkling thickness is between 0.1 mm and 0.5 mm to form a hollow glass microsphere layer;

[0008] The third step: Lay a layer of release paper flat on the upper surface of the hollow glass microsphere layer;

[0009] The fourth step: Turn on the hot press, the pressure of the hot press is 0.4 Mpa, the temperature is between 120 and 140 °C, and the time is kept between 10 and 15 s;

[0010] The fifth step: After the hot press finishes working, remove the release paper and let it stand and cool for more than 5 min;

[0011] Step 6: Use a soft brush to clean the hollow glass microspheres that have not been incorporated into and adhered to the hot melt adhesive film;

[0012] Step 7: Lay the hot melt adhesive film flat again, and repeat the content of the second to sixth steps. The number of repetitions is determined according to the required thickness;

[0013] Step 8: Lay the hot melt adhesive film flat on the top layer, then lay the flexible film flat, and then lay a layer of release paper flat. Repeat the content of the fourth and fifth steps;

[0014] Step 9: Invert the upper and lower surfaces of the material after the above steps, with the base film on the top, and repeat the content of the second to eighth steps.

[0015] Furthermore, the material of the base film is fiberglass cloth, fiber cloth, polyvinyl chloride film, polyethylene film, polypropylene film or polystyrene film.

[0016] Furthermore, the hot melt adhesive film is a polyester hot melt adhesive film, a vinyl acetate copolymer hot melt adhesive film, an acrylic acid copolymer hot melt adhesive film, a polyester hot melt adhesive web, a polyurethane hot melt adhesive web or a vinyl acetate copolymer hot melt adhesive web.

[0017] Furthermore, the flexible film is a polyvinyl chloride film, a polyethylene film, a polypropylene film or a polystyrene film.

[0018] Furthermore, the hollow glass microspheres are hollow, airtight, spherical and powdery glass microspheres.

[0019] Furthermore, the particle size of the hollow glass microspheres is 15 - 135 μm.

[0020] Furthermore, the compressive strength of the hollow glass microspheres is 1.7 - 124 Mpa.

[0021] Furthermore, the density of the hollow glass microspheres is 0.12 - 0.6 g / cm 3 .

[0022] Furthermore, the release paper is kraft single-silicon release paper or high-temperature resistant silicon oil paper.

[0023] An acoustic reflection cloth prepared by a method for preparing a hot melt adhesive film multi-layer hollow glass microsphere acoustic reflection cloth, including a base film, several hollow glass microsphere layers and two layers of flexible films. The several hollow glass microsphere layers are bonded by a hot melt adhesive film. One layer of flexible film, the integrally bonded hollow glass microsphere layers, the base film, another integrally bonded hollow glass microsphere layer, and another layer of flexible film are arranged in sequence.

[0024] Compared with the prior art, the beneficial effects of the hot melt adhesive film multi-layer hollow glass microsphere acoustic reflection cloth and its manufacturing method of the present invention are:

[0025] (1) The present invention manufactures a multi-layer sound reflection cloth by a method of layered pressing and melting adhesion. The thickness of the sound reflection cloth is uniformly controllable and has good thickness uniformity.

[0026] (2) The hollow glass microspheres of the present invention are distributed in the sound reflection cloth by a melting method. The hollow glass microspheres have a large volume ratio and have the advantage of good sound reflection effect.

[0027] (3) The present invention adopts a method of layered stacking, and the thickness of the sound reflection cloth can be adjusted as needed.

[0028] (4) The multi-layer sound reflection cloth of the present invention is a thin-layer structure and is easy to cut.

[0029] (5) The multi-layer sound reflection cloth of the present invention has a flexible characteristic and is easy to fold and store. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 is a schematic diagram of a hot melt adhesive film laid flat on the substrate according to the present invention;

[0032] Figure 2 is a schematic diagram of a release paper laid on the upper surface of the hot melt adhesive film after uniformly sprinkling hollow glass microspheres according to the present invention;

[0033] Figure 3 is a schematic diagram of the hollow glass microspheres incorporated and adhered to the hot melt adhesive film according to the present invention;

[0034] Figure 4 is a schematic diagram of a hot melt adhesive film and a release paper laid flat on the glass microsphere layer according to the present invention;

[0035] Figure 5 is a schematic diagram of the glass microspheres incorporated and adhered to the upper hot melt adhesive film according to the present invention;

[0036] Figure 6 is a schematic diagram of a release paper laid after the second sprinkling of hollow glass microspheres according to the present invention;

[0037] Figure 7 is a schematic diagram of the hollow glass microspheres incorporated and adhered to the hot melt adhesive film for the second time according to the present invention;

[0038] Figure 8 is a schematic diagram of a hot melt adhesive film, a flexible film and a release paper laid flat on the uppermost layer according to the present invention;

[0039] Figure 9 It is a schematic diagram of the uppermost layer of glass microspheres in the present invention being incorporated into the hot melt adhesive film;

[0040] Figure 10 It is a schematic diagram of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth of the present invention.

[0041] Among them, 1 - base film, 2 - hot melt adhesive film, 3 - hollow glass microsphere layer, 4 - release paper, 5 - flexible film. Specific embodiments

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0043] See Figures 1 - 10 To illustrate this embodiment, a manufacturing method of a hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth is as follows:

[0044] In the first step, as Figure 1 shown, lay the base film 1 flat on the silicone pad of the hot press, and then lay the hot melt adhesive film 2 flat on the base film 1;

[0045] In the second step, as Figure 2 shown, evenly sprinkle the hollow glass microspheres on the upper surface of the hot melt adhesive film 2, and the sprinkling thickness is between 0.1 mm and 0.5 mm to form a hollow glass microsphere layer 3;

[0046] In the third step, as Figure 2 shown, lay a layer of release paper 4 flat on the upper surface of the hollow glass microsphere layer 3;

[0047] In the fourth step, turn on the hot press, the pressure of the hot press is 0.4 Mpa, the temperature is between 120 and 140 °C, and the time is kept between 10 and 15 s;

[0048] In the fifth step, after the hot press finishes working, remove the release paper 4 and let it stand and cool for more than 5 min;

[0049] In the sixth step, as Figure 3 shown, use a soft brush to clean up the hollow glass microspheres that have not been incorporated into and adhered to the hot melt adhesive film 2;

[0050] In the seventh step, as Figure 4 shown, lay the hot melt adhesive film 2 flat again. As Figures 5 - 7 shown, repeat the content of the second to sixth steps, and the number of repetitions is determined according to the required thickness;

[0051] In the eighth step, asFigure 8 and Figure 9 As shown in Figure 9 , lay the hot melt adhesive film 2 flat on the top layer, then lay the flexible film 5 flat, and then lay a layer of release paper 4 flat. Repeat the content of the fourth and fifth steps;

[0052] Step 9, as Figure 10 shown, invert the upper and lower surfaces of the material after the above steps are completed, so that the base film 1 is at the top, and repeat the content of the second to eighth steps.

[0053] The material of the base film 1 is fiberglass cloth, fiber cloth, polyvinyl chloride film, polyethylene film, polypropylene film or polystyrene film.

[0054] The hot melt adhesive film 2 is a polyester hot melt adhesive film, a vinyl acetate copolymer hot melt adhesive film, an acetic acid acrylic copolymer hot melt adhesive film, a polyester hot melt adhesive web, a polyurethane hot melt adhesive web or a vinyl acetate copolymer hot melt adhesive web.

[0055] The flexible film 5 is a polyvinyl chloride film, a polyethylene film, a polypropylene film or a polystyrene film.

[0056] The hollow glass microspheres are hollow, airtight, spherical powder-shaped glass microspheres.

[0057] The particle size of the hollow glass microspheres is 15 - 135 μm.

[0058] The compressive strength of the hollow glass microspheres is 1.7 - 124 Mpa.

[0059] The density of the hollow glass microspheres is 0.12 - 0.6 g / cm 3 .

[0060] The release paper 4 is kraft single-silicon release paper or high-temperature resistant silicon oil paper.

[0061] A sound reflection cloth prepared by a preparation method of a hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth, including a base film 1, several hollow glass microsphere layers 3 and two layers of flexible films 5. Several hollow glass microsphere layers 3 are bonded by a hot melt adhesive film 2. One layer of flexible film 5, the whole of the bonded hollow glass microsphere layers 3, the base film 1, the whole of another bonded hollow glass microsphere layer 3 and another layer of flexible film 5 are arranged in sequence.

[0062] The embodiments of the present invention disclosed above are only used to help explain the present invention. The embodiments do not describe all the details in detail, nor limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention.

Claims

1. A preparation method of a hot-melt adhesive film multi-layer hollow glass microsphere sound reflection cloth, characterized in that: Specifically, it includes the following steps: The first step: Lay the base film (1) flat on the silicone pad of the hot press, and then lay the hot melt adhesive film (2) flat on the base film (1); The second step: Evenly sprinkle the hollow glass microspheres on the upper surface of the hot melt adhesive film (2), and the sprinkling thickness is between 0.1 mm and 0.5 mm to form a hollow glass microsphere layer (3); The third step: Lay a layer of release paper (4) flat on the upper surface of the hollow glass microsphere layer (3); The fourth step: Turn on the hot press, the pressure of the hot press is 0.4 Mpa, the temperature is between 120 and 140 °C, and the time is kept between 10 and 15 s; The fifth step: After the hot press finishes working, remove the release paper (4) and let it stand and cool for more than 5 min; The sixth step: Use a soft brush to clean up the hollow glass microspheres that have not melted and adhered to the hot melt adhesive film (2); The seventh step: Lay the hot melt adhesive film (2) flat again, and repeat the content of the second to sixth steps. The number of repetitions is determined according to the required thickness; The eighth step: Lay the hot melt adhesive film (2) flat on the top layer, then lay the flexible film (5) flat, and then lay a layer of release paper (4) flat, and repeat the content of the fourth and fifth steps; The ninth step: Invert the upper and lower surfaces of the material after the above steps, so that the base film (1) is at the top, and repeat the content of the second to eighth steps.

2. The preparation method of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth according to claim 1, characterized in that: The material of the base film (1) is fiber cloth, polyvinyl chloride film, polyethylene film, polypropylene film or polystyrene film.

3. The preparation method of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth according to claim 1, characterized in that: The hot melt adhesive film (2) is a polyester hot melt adhesive film, a vinyl acetate copolymer hot melt adhesive film or a polyurethane hot melt adhesive net film.

4. The preparation method of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth according to claim 1, characterized in that: The flexible film (5) is a polyvinyl chloride film, a polyethylene film, a polypropylene film or a polystyrene film.

5. The preparation method of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth according to claim 1, characterized in that: The hollow glass microspheres are hollow and airtight spherical powder glass microspheres.

6. The preparation method of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth according to claim 1, characterized in that: The particle size of the hollow glass microspheres is 15 - 135 μm.

7. The preparation method of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth according to claim 1, characterized in that: The compressive strength of the hollow glass microspheres is 1.7 - 124 Mpa.

8. The preparation method of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth according to claim 1, characterized in that: The density of the hollow glass microspheres is 0.12 to 0.6 g / cm 3 .

9. The preparation method of the hot melt adhesive film multi-layer hollow glass microsphere sound reflection cloth according to claim 1, characterized in that: The release paper (4) is kraft single-silicon release paper or high-temperature resistant silicon oil paper.

10. An acoustic reflection cloth prepared by the preparation method of the hot-melt adhesive film multi-layer hollow glass microsphere acoustic reflection cloth according to any one of claims 1-9, characterized in that: It includes a base film (1), several hollow glass microsphere layers (3) and two layers of flexible films (5). The several hollow glass microsphere layers (3) are bonded by a hot melt adhesive film (2). One layer of flexible film (5), the whole of the bonded hollow glass microsphere layer (3), the base film (1), the whole of another bonded hollow glass microsphere layer (3) and another layer of flexible film (5) are arranged in sequence.

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