Sound-insulation and heat-insulation glass film

Abstract

The invention discloses a sound-insulation and heat-insulation glass film which is provided with a hollow glass bead / PET composite layer, due to the characteristics of hollow glass beads, a closed hollow structure can effectively block a sound propagation path, and the sound-insulation and heat-insulation glass film has a silencing effect; and meanwhile, the TPU layer and the metal coating can play a role in synergistic silencing at the lower layer, so that a remarkable sound insulation effect is generated. Besides, the hollow glass bead / PET composite layer can scatter light, so that on one hand, the TPU layer is physically protected, and on the other hand, the weather resistance of the TPU layer can be improved. And moreover, the metal coating can reflect part of light rays, so that heat transfer is reduced, and the requirement on heat insulation performance is met. The sound-insulation and heat-insulation glass film has a wide application prospect when being applied to glass outer films in the field of automobiles or buildings.

Description

Technical Field

[0001] The invention relates to the technical field of glass films, in particular to a sound insulation and heat insulation glass film. Background Art

[0002] Glass has a high light transmittance and good lighting effect, which can provide a bright and warm atmosphere. However, with the development and progress of society, noise pollution has become more and more serious and has attracted more and more attention, so various soundproof glass has appeared in people's vision. Insulating glass is a high-efficiency soundproof and heat-insulating glass made of two pieces of glass, using a high-strength and high-airtightness composite adhesive to bond the glass sheets to the mounting frame containing desiccant. Insulating glass has many properties that are superior to ordinary double-layer glass, so it has been widely recognized by the industry.

[0003] However, the current hollow glass lacks a corresponding heat insulation structure, resulting in limited heat insulation effect. It also lacks a corresponding sound absorption structure, resulting in insufficient sound insulation effect, affecting people's lives.

[0004] With the advent of new materials, glass films are constantly being innovated and widely used in the fields of automotive glass, architectural glass, etc. However, the performance of existing glass films in terms of sound insulation and heat insulation cannot meet the use requirements, especially for architectural glass films. In today's environment of rapid urban development, increasingly serious noise and light pollution, the demand for sound insulation and heat insulation is even greater.

[0005] Therefore, it is necessary to propose a sound insulation and heat insulation glass film to meet the needs of users for sound insulation and heat insulation effects when using external films. Summary of the invention

[0006] The present invention aims to provide a sound insulation and heat insulation glass film, so as to meet the needs of users for sound insulation and heat insulation effects when using external films.

[0007] In view of this, the scheme of the present invention is:

[0008] The sound insulation and heat insulation glass film comprises an anti-scratch layer, a PET film layer, a first adhesive layer, a TPU layer, a second adhesive layer, a metal plating layer, a substrate layer and an installation adhesive layer which are sequentially stacked from top to bottom; the PET film layer is a hollow glass microbead / PET composite layer with a thickness of 100-500 μm; the thickness of the TPU layer is 50-1000 μm.

[0009] Furthermore, the PET film layer is obtained by uniformly blending PET particles with 1-3w% of hollow glass microspheres, extruding and stretching; the hollow glass microspheres are modified by silanization using an organic functional group coupling agent before blending.

[0010] Preferably, the particle size of the hollow glass microspheres is 20-50 μm.

[0011] Preferably, the organic functional group coupling agent silane is selected from at least one of γ-methacryloxypropyltrimethoxysilane, 3-ureapropyltriethoxysilane and γ-aminopropyltriethoxysilane.

[0012] Furthermore, the anti-scratch layer is a self-repairing coating or an acrylic polyurethane hardening coating.

[0013] Furthermore, the metal plating layer is an aluminum plating layer, a silver plating layer or a gold plating layer, and has a thickness of less than 0.5 μm.

[0014] Furthermore, the substrate layer is a PET film.

[0015] Furthermore, the first adhesive layer and the second adhesive layer are each independently one of acrylic pressure-sensitive adhesive or polyurethane adhesive.

[0016] Furthermore, the sound insulation and heat insulation glass film also includes a release layer arranged under the installation adhesive layer.

[0017] Another object of the present invention is to propose the application of the above-mentioned sound insulation and heat insulation glass film in automobile or building glass film; preferably used in building glass film.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The sound insulation and heat insulation glass film of the present invention is provided with a hollow glass microbead / PET composite layer. Due to the characteristics of the hollow glass microbeads, the closed hollow structure can effectively block the propagation path of sound and achieve a soundproofing effect; at the same time, the TPU layer and the metal coating can play a synergistic soundproofing role in the lower layer, producing a significant sound insulation effect. In addition, the hollow glass microbead / PET composite layer can scatter light, which can physically protect the TPU layer on the one hand and improve the weather resistance of the TPU layer on the other hand. Furthermore, the metal coating can reflect part of the light, reduce the input of heat, and meet the requirements for heat insulation performance. The sound insulation and heat insulation glass film is applied to the exterior glass film in the automotive or construction fields and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall schematic diagram of the sound insulation and heat insulation glass film provided by the present invention.

[0021] In the figure, 1, anti-scratch layer; 2, PET layer; 3, first adhesive layer; 4, TPU layer; 5, second adhesive layer; 6, metal plating layer; 7, substrate layer; 8, mounting adhesive layer; 9, release layer. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "connection", "fixation", "setting" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be determined according to the specific circumstances.

[0025] In one embodiment, Figure 1 As shown, a sound insulation and heat insulation glass film is provided, which includes an anti-scratch layer 1, a PET layer 2, a first adhesive layer 3, a TPU layer 4, a second adhesive layer 5, a metal plating layer 6, a substrate layer 7, a mounting adhesive layer 8 and a release layer 9 stacked in sequence from top to bottom. The PET film layer 1 is a hollow glass microbead / PET composite layer with a thickness of 100-500 μm; the thickness of the TPU layer 4 is 50-1000 μm.

[0026] In the above embodiment, the hollow glass microsphere / PET composite layer combines the characteristics of hollow glass microspheres, and the closed hollow structure can effectively block the propagation path of sound, achieving a sound-absorbing effect; at the same time, the TPU layer and the metal coating can play a synergistic sound-absorbing role in the lower layer, producing a significant sound insulation effect. In addition, the hollow glass microsphere / PET composite layer can scatter light, which can physically protect the TPU layer 4 on the one hand, and improve the weather resistance of the TPU layer on the other hand. Furthermore, the metal coating can reflect part of the light, reduce the heat transfer, and meet the requirements for thermal insulation performance.

[0027] In the above embodiment, the hollow glass microsphere / PET composite layer is obtained by uniformly blending PET particles and hollow glass microspheres, extruding and stretching; the hollow glass microspheres are modified by silanization using an organic functional group coupling agent before blending. The organic functional group coupling agent silane is selected from at least one of γ-methacryloxypropyltrimethoxysilane, 3-ureapropyltriethoxysilane, and γ-aminopropyltriethoxysilane.

[0028] In some embodiments, specifically, the modification method of the hollow glass microspheres is: adding the cleaned and surface-dried hollow glass microspheres to an alcohol solution containing a silane coupling agent, ultrasonically treating for 10-25 minutes to form a dispersed system, and then removing the alcohol solvent to obtain modified hollow glass microspheres.

[0029] In a preferred embodiment, in order to ensure the necessary hollow structure content and cost control, the amount of the hollow glass microspheres is 1-3w% of the PET particles, and the particle size of the hollow glass microspheres is 20-50 μm, preferably 30 μm.

[0030] The anti-scratch layer is provided to prevent the PET layer 2 from being scratched, which would affect the appearance and service life of the glass film. Preferably, the anti-scratch layer 1 is a self-repairing coating, or an acrylic polyurethane hardening coating. The self-repairing coating can be a common composite system composed of a variety of materials such as microcapsules, nanoparticles, polymers and reactants. The microcapsules in the coating are sticky and flexible, and can buffer and absorb external forces to protect the coating from physical damage; the nanoparticles have a high specific surface area and reactivity, and can catalyze the self-repairing reaction of the coating; the polymer can provide morphological stability and chemical corrosion resistance of the self-repairing material.

[0031] The metal coating can reflect part of the light, reduce the heat input, and play a synergistic role in improving the dimming and heat insulation effects of the glass film. Preferably, the metal coating 6 can be selected from common metal materials and attached to the substrate layer 7 by sputtering or the like, preferably an aluminum coating, a silver coating or a gold coating with a higher reflectivity, and a thickness of less than 0.5 μm.

[0032] In a preferred embodiment, the first adhesive layer 3 and the second adhesive layer 5 are each independently made of one of acrylic pressure-sensitive adhesive and polyurethane adhesive.

[0033] In some embodiments, the soundproof and heat-insulating glass film can be used as glass film in the construction field, or as car glass film. The release layer 9 is torn off, and the installation adhesive layer 8 is attached to the outside of the glass to complete the installation, which has good soundproof and heat-insulating effects.

[0034] The following are preferred implementation examples. If the manufacturer of the reagent or instrument is not specified in the examples, conventional products can be purchased from the market. If the specific conditions are not specified, conventional conditions or conditions recommended by the manufacturer can be used.

[0035] Example 1

[0036] A sound insulation and heat insulation glass film, which is composed of a self-repairing coating, a hollow glass microsphere / PET composite layer, an acrylic pressure-sensitive adhesive layer, a TPU layer, an acrylic pressure-sensitive adhesive layer, an aluminum-plated layer, a PET substrate layer, an installation adhesive layer and a release layer stacked in sequence from top to bottom. The thickness of the hollow glass microsphere / PET composite layer is 200 μm; the thickness of the TPU layer is 200 μm, and the thickness of the aluminum-plated layer is 0.3 μm.

[0037] The preparation method of the hollow glass microsphere / PET composite layer is as follows:

[0038] 1) adding the cleaned and surface-dried hollow glass microspheres with a particle size of 20 μm to an ethanol solution containing a silane coupling agent KH570 (γ-methacryloxypropyltrimethoxysilane), ultrasonically treating for 10 minutes to form a dispersed system, and then removing the ethanol to obtain modified hollow glass microspheres;

[0039] 2) 3 wt % of modified hollow glass microspheres were added to PET particles and mixed evenly, and then extruded and stretched to obtain a film with a thickness of 100 μm.

[0040] Example 2

[0041] A sound insulation and heat insulation glass film, which is composed of a self-repairing coating, a hollow glass microsphere / PET composite layer, a polyurethane adhesive layer, a TPU layer, a polyurethane adhesive layer, an aluminum coating layer, a PET substrate layer, a mounting adhesive layer and a release layer stacked in sequence from top to bottom. The thickness of the hollow glass microsphere / PET composite layer is 300 μm; the thickness of the TPU layer is 100 μm, and the thickness of the aluminum coating layer is 0.2 μm.

[0042] The preparation method of the hollow glass microsphere / PET composite layer is as follows:

[0043] 1) adding the cleaned and surface-dried hollow glass microspheres with a particle size of 50 μm to an ethanol solution containing a silane coupling agent KH570 (γ-methacryloxypropyltrimethoxysilane), ultrasonically treating for 20 minutes to form a dispersed system, and then removing the ethanol to obtain modified hollow glass microspheres;

[0044] 2) 1 wt % of modified hollow glass microspheres were added to PET particles and blended evenly, and then extruded and stretched to obtain a film with a thickness of 300 μm.

[0045] Example 3

[0046] A sound insulation and heat insulation glass film, which is composed of a self-repairing coating, a hollow glass microsphere / PET composite layer, an acrylic pressure-sensitive adhesive layer, a TPU layer, a polyurethane adhesive layer, an aluminum-plated layer, a PET substrate layer, an installation adhesive layer and a release layer stacked in sequence from top to bottom. The thickness of the hollow glass microsphere / PET composite layer is 200 μm; the thickness of the TPU layer is 100 μm, and the thickness of the aluminum-plated layer is 0.5 μm.

[0047] The preparation method of the hollow glass microsphere / PET composite layer is as follows:

[0048] 1) adding the cleaned and surface-dried hollow glass microspheres with a particle size of 30 μm to an ethanol solution containing a silane coupling agent KH570 (γ-methacryloxypropyltrimethoxysilane), ultrasonically treating for 15 minutes to form a dispersed system, and then removing the ethanol to obtain modified hollow glass microspheres;

[0049] 2) 2 wt % of modified hollow glass microspheres were added to PET particles and mixed evenly, and then extruded and stretched to obtain a film with a thickness of 200 μm.

[0050] Comparative Example 1

[0051] A glass film, which is composed of a self-repairing coating, a PET layer, an acrylic pressure-sensitive adhesive, a TPU layer, an acrylic pressure-sensitive adhesive, an aluminum-plated layer, a PET substrate layer, a mounting adhesive layer and a release layer stacked in sequence from top to bottom. The PET layer is free of hollow glass microbeads and has a thickness of 200 μm; the TPU layer has a thickness of 100 μm, and the aluminum-plated layer has a thickness of 0.5 μm.

[0052] Comparative Example 2

[0053] A glass film, which is composed of a self-repairing coating, a hollow glass microsphere / PET composite layer, an acrylic pressure-sensitive adhesive layer, an aluminum-plated layer, a PET substrate layer, a mounting adhesive layer and a release layer stacked in sequence from top to bottom, and does not contain a TPU layer. The hollow glass microsphere / PET composite layer has a thickness of 200 μm, and the preparation method is the same as that of Example 3; the aluminum-plated layer has a thickness of 0.5 μm.

[0054] Comparative Example 3

[0055] A glass film, which is composed of a self-repairing coating, a hollow glass microsphere / PET composite layer, an acrylic pressure-sensitive adhesive layer, a TPU layer, a polyurethane adhesive layer, a PET substrate layer, a mounting adhesive layer and a release layer stacked in sequence from top to bottom. The thickness of the hollow glass microsphere / PET composite layer is 200 μm, and the preparation method is the same as that of Example 3; the thickness of the TPU layer is 100 μm, and does not contain an aluminum plating layer.

[0056] Experimental Example 1: Sound insulation test

[0057] The glass films obtained in the above-mentioned Examples 1-3 and Comparative Examples 1-3 were placed on the openings of the soundproof box for sound insulation simulation tests. Three glass films were tested in each group, and the data were averaged. The soundproof box had good sealing and sound insulation performance. A noise meter was placed in the soundproof box to measure the noise, and the glass film to be tested was placed on the opening. A loudspeaker with adjustable volume was placed directly above the opening. The test was performed at 0, 20dB, 40dB, 60dB, and 80dB volumes, and the noise meter data was recorded. The test data is shown in Table 1.

[0058] Table 1: Sound insulation test results

[0059] Volume / dB 0 20 40 60 80 Example 1 0 5 11 22 34 Example 2 0 6 10 21 32 Example 3 0 6 9 18 30 Comparative Example 1 0 13 28 48 59 Comparative Example 2 0 10 23 38 50 Comparative Example 3 0 9 21 34 44

[0060] It can be clearly seen from Table 1 that the glass films described in Examples 1-3 have obvious sound insulation and noise reduction functions. In Comparative Example 1, the second PET layer is not blended with hollow glass microbeads, and its sound insulation effect is significantly reduced; and Comparative Examples 2 and 3 respectively reduce the TPU layer and the metal coating layer, and the performance also decreases to varying degrees.

[0061] Experimental Example 2: Thermal insulation test

[0062] The glass films obtained in the above Examples 1-3 and Comparative Examples 1-3 were tested for heat insulation performance. Specifically, a heat insulation box was set up to place the glass film in an open position, a thermometer was built into the heat insulation box to measure the temperature inside the box, and the temperature was placed in direct sunlight at a temperature of 35°C. The temperature change of the thermometer was recorded at 0min, 15min, 30min, 45min, and 60min as time went by. The test results are shown in Table 2.

[0063] Table 2: Thermal insulation test results

[0064] Temperature / ℃ 0 15min 30min 45min 60min Example 1 35.0 37.1 39.2 41.3 43.5 Example 2 35.0 37.0 38.9 40.8 42.7 Example 3 35.0 36.8 38.3 40.0 41.6 Comparative Example 1 35.0 40.7 47.3 53.2 61.5 Comparative Example 2 35.0 42.5 51.8 59.7 63.2 Comparative Example 3 35.0 44.6 53.1 61.0 66.7

[0065] It can be clearly seen from Table 1 that the glass films described in Examples 1 to 3 have significant heat insulation effects. In Comparative Example 1, the second PET layer is not blended with hollow glass microbeads, and its heat insulation effect is significantly reduced; and Comparative Examples 2 and 3 respectively reduce the TPU layer and the metal coating layer, resulting in a greater decrease in heat insulation performance.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sound insulation and heat insulation glass film, characterized in that: It includes an anti-scratch layer, a PET film layer, a first adhesive layer, a TPU layer, a second adhesive layer, a metal plating layer, a substrate layer and an installation adhesive layer stacked in sequence from top to bottom; the PET film layer is a hollow glass microbead / PET composite layer with a thickness of 100-500μm; the thickness of the TPU layer is 50-1000μm.

2. The sound insulation and heat insulation glass film according to claim 1, characterized in that: The PET film layer is obtained by uniformly blending PET particles and 1-3w% of hollow glass microspheres, extruding and stretching; the hollow glass microspheres are modified by silanization using an organic functional group coupling agent before blending.

3. The sound insulation and heat insulation glass film according to claim 2, characterized in that: The particle size of the hollow glass microspheres is 20-50 μm.

4. The sound insulation and heat insulation glass film according to claim 2, characterized in that: The organic functional group coupling agent silane is selected from at least one of γ-methacryloxypropyltrimethoxysilane, 3-ureapropyltriethoxysilane and γ-aminopropyltriethoxysilane.

5. The sound insulation and heat insulation glass film according to claim 1, characterized in that: The anti-scratch layer is a self-repairing coating or an acrylic polyurethane hardening coating.

6. The sound insulation and heat insulation glass film according to claim 1, characterized in that: The metal plating layer is an aluminum plating layer, a silver plating layer or a gold plating layer, and has a thickness of less than 0.5 μm.

7. The sound insulation and heat insulation glass film according to claim 1, characterized in that: The substrate layer is a PET film.

8. The sound insulation and heat insulation glass film according to claim 1, characterized in that: The first adhesive layer and the second adhesive layer are each independently made of an acrylic pressure-sensitive adhesive or a polyurethane adhesive.

9. The sound insulation and heat insulation glass film according to claim 1, characterized in that: The invention also comprises a release layer arranged under the installation adhesive layer.

10. Use of the sound and heat insulating glass film according to any one of claims 1 to 9 in automobile or building glass films.

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