Packaging aerogel felt

Abstract

The utility model provides a packaging aerogel felt, and relates to the technical field of aerogel felts, the packaging aerogel felt comprises a base material and aerogel compounded on the base material, and the surface of a core layer is provided with a hydrophobic layer; a first adhesive layer is adhered to one side of the upper skin layer, and the upper skin layer is adhered to the upper surface of the core layer through the first adhesive layer; a second adhesive layer is adhered to one side of the lower skin layer, and the lower skin layer is adhered to the lower surface of the core layer through the second adhesive layer; the size of the upper skin layer and the size of the lower skin layer are both larger than that of the core layer, the core layer, the upper skin layer and the lower skin layer are mutually bonded through an adhesive, the edges of the upper skin layer and the lower skin layer are mutually bonded to form a sealing edge, so that the upper skin layer and the lower skin layer seal and package the core layer through the sealing edge, and the phenomenon of powder falling of the aerogel felt is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of aerogel felt, in particular to a packaged aerogel felt. Background Art

[0002] Aerogel felt is a new type of nano thermal insulation material prepared by composite preparation of substrate and aerogel. The substrate itself is selected to have a porous structure, such as foam, which is cheap and has good elasticity. The aerogel glue can enter the pores and fill the pores through the gel. The aerogel has good thermal insulation performance after gelation. At the same time, the substrate can enhance the flexibility and strength of the aerogel material, so that the prepared aerogel felt has better performance. The prepared aerogel felt is widely used in construction, transportation, aviation, electromechanical, electronics and household appliances; it can help the electronic and electrical industry to achieve fire retardant, thermal insulation and heat preservation effects.

[0003] However, aerogel is light and brittle, so after the substrate and aerogel felt are composited, the aerogel powder on the surface of the substrate is easy to fall off during use. The falling aerogel powder will not only cause damage to the user's body, but also affect the thermal insulation performance of the prepared aerogel felt. Utility Model Content

[0004] The utility model aims to provide a packaged aerogel felt, aiming to solve the problem of powder falling off on the surface of the aerogel felt in general technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The encapsulated aerogel felt comprises: a core layer, comprising a substrate and an aerogel composited on the substrate, wherein a hydrophobic layer is arranged on the surface of the core layer; an upper skin layer, wherein a first adhesive layer is bonded to one side of the upper skin layer, and the upper skin layer is bonded to the upper surface of the core layer through the first adhesive layer; a lower skin layer, wherein a second adhesive layer is bonded to one side of the lower skin layer, and the lower skin layer is bonded to the lower surface of the core layer through the second adhesive layer; the sizes of the upper skin layer and the lower skin layer are both larger than the core layer, and the core layer, the upper skin layer and the lower skin layer are bonded to each other through the first adhesive layer and the second adhesive layer, and the edges of the upper skin layer and the lower skin layer are bonded to each other to form an edge seal, so that the upper skin layer and the lower skin layer form a sealed package for the core layer through the edge seal.

[0007] The beneficial effect is: by setting the upper skin layer and the lower skin layer to be larger than the core layer, coating the first adhesive layer on the upper skin layer, coating the second adhesive layer on the inner wall of the lower skin layer, and simultaneously hot-pressing the core layer, the upper skin layer and the lower skin layer, the upper skin layer and the lower skin layer are tightly bonded to the core layer through the adhesive to seal the upper and lower surfaces of the core layer, and at the same time, the upper skin layer and the lower skin layer are hot-pressed to form a sealing edge to seal the side of the core layer to avoid the aerogel felt from falling powder, that is, In order to prevent a large amount of powdering of the aerogel felt from affecting its thermal insulation performance, the surface of the core layer is hydrophobically modified before the upper and lower skin layers are bonded to the core layer, so that the surface of the core layer is connected with a hydrophobic layer. The adhesive melts during the hot pressing process. Under the action of the hydrophobic layer on the surface of the aerogel felt, the liquid adhesive is not easy to enter the pores on the surface of the core layer to cause blockage of the pores, thereby reducing the effect of the adhesive entering the gaps on the surface of the core layer on the thermal insulation performance of the aerogel felt, so that the encapsulated aerogel felt maintains good thermal insulation performance.

[0008] A further technical solution of the utility model is that the upper skin layer and the lower skin layer are any one of organic film materials such as polyester film, polyimide, polyvinyl chloride, polyethylene, polypropylene, polycarbonate, etc.

[0009] A further technical solution of the utility model is that the thickness of the upper skin layer and the lower skin layer are both 0.1mm-0.3mm.

[0010] A further technical solution of the utility model is that the first adhesive layer and the second adhesive layer are acrylic adhesive or epoxy resin adhesive.

[0011] A further technical solution of the utility model is that a compatibility layer is arranged on the surface of the core layer, and the compatibility layer is used to improve the adhesion between the core layer and the upper skin layer and the lower skin layer.

[0012] A further technical solution of the utility model is that the substrate is one or more of foam, glass fiber, ceramic fiber, pre-oxidized silk fiber, and mullite fiber felt.

[0013] The beneficial effect is: a compatibility layer is set on the surface of the core layer, and the compatibility layer used in the present application is a silane coupling agent, that is, the surface of the core layer is treated with a silane coupling agent before the upper skin layer and the lower skin layer are installed on the core layer to improve the compatibility between the core layer and the skin layer, thereby improving the stability of the connection between the upper skin layer, the lower skin layer and the core layer after encapsulation, so that the structure of the prepared encapsulated aerogel felt is more firm and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.

[0015] Figure 2It is a cross-sectional view of the first embodiment of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the second embodiment of the utility model.

[0017] Figure 4 It is a cross-sectional view of the second embodiment of the utility model.

[0018] In the figure: 1-core layer, 2-upper skin layer, 21-first adhesive layer, 3-lower skin layer, 31-second adhesive layer, 4-edge sealing. DETAILED DESCRIPTION

[0019] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0020] like Figure 1-Figure 2 As shown, the first embodiment of the utility model is a packaged aerogel felt, including a core layer 1, an upper skin layer 2 and a lower skin layer 3. The core layer 1 is composited by a substrate and aerogel. The substrate is one or more of foam, glass fiber, ceramic fiber, pre-oxidized silk fiber, and mullite fiber felt. In this embodiment, the aerogel is filled in the gaps of the substrate.

[0021] Since aerogel itself is light and brittle, it is easy to fall off during the use of aerogel felt. An upper skin layer 2 and a lower skin layer 3 are respectively arranged on the two side surfaces of the core layer 1, and the sizes of the upper skin layer 2 and the lower skin layer 3 are both larger than the core layer 1. A first adhesive layer 21 is bonded to one side of the upper skin layer 2, and the upper skin layer 2 is bonded to the upper surface of the core layer 1 through the first adhesive layer 21; a second adhesive layer 31 is bonded to one side of the lower skin layer 3, and the lower skin layer 3 is bonded to the lower surface of the core layer 1 through the second adhesive layer 31; by simultaneously hot pressing the core layer 1, the upper skin layer 2 and the lower skin layer 3, the upper skin layer 2 and the lower skin layer 3 are bonded to the core layer 1 through the first adhesive layer 21 and the second adhesive layer 31, and the edge parts of the upper skin layer 2 and the lower skin layer 3 that are larger than the core layer 1 are bonded to each other to form an edge seal 4, so that the upper skin layer 2, the lower skin layer 3 and the edge seal 4 jointly encapsulate the core layer 1 to form an aerogel felt.

[0022] The inside of the core layer 1 is impregnated with aerogel glue liquid for the substrate, and the core layer 1 is aged as a whole after the aerogel glue liquid enters the inside of the substrate, so that the aerogel glue liquid inside the substrate undergoes a gelation reaction. During the gelation process, nano-scale particles in the sol liquid aggregate with each other to form a continuous three-dimensional network structure. After the three-dimensional network structure fills the pores inside the substrate, an aerogel felt with heat insulation performance is formed. After the aerogel aging treatment is completed, a hydrophobic layer is set on the outer surface of the core layer 1, that is, the hydrophobic agent is heated to a gaseous state and distributed on the core layer 1. The hydrophobic agent on the surface of the layer and in the surface pores is the hydrophobic agent used for commercially available aerogel felt; the first adhesive layer 21 and the second adhesive layer 31 melt during the hot pressing process, and under the action of the hydrophobic layer on the surface of the aerogel felt, the liquid first adhesive layer 21 and the second adhesive layer 31 are not easy to enter the pores on the surface of the core layer 1 to cause blockage of the pores, thereby reducing the influence of the first adhesive layer 21 and the second adhesive layer 31 entering the surface gaps of the core layer 1 on the thermal insulation performance of the aerogel felt, so that the encapsulated aerogel felt maintains good thermal insulation performance.

[0023] Since the core layer 1 has a low polarity and a porous structure, its bonding performance is poor. A compatibility layer is provided on the outer surface of the core layer 1, that is, after a hydrophobic layer is provided on the surface of the core layer 1 and before it is attached to the upper skin layer 2 and the lower skin layer 3, a compatibility layer is provided on the surface of the core layer 1 to improve the bonding between the core layer 1 and the upper skin layer 2 and the lower skin layer 3, so that the structure of the prepared encapsulated aerogel felt is more stable. In this embodiment, the compatibility layer used is formed by connecting a silane coupling agent to the outer surface of the core layer, and the silane coupling agent used is one or more of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and γ-aminopropyltriethoxysilane.

[0024] In this embodiment, the upper skin layer 2 and the lower skin layer 3 are two films, and the four sides of the upper skin layer 2 and the lower skin layer 3 are hot pressed to form a sealing edge 4 to encapsulate the core layer 1. The thickness of the upper skin layer 2 and the lower skin layer 3 are both 0.1mm-0.3mm. The upper skin layer 2 and the lower skin layer 3 are both one of the organic film materials such as polyester film, polyimide, polyvinyl chloride, polyethylene, polypropylene, polycarbonate, etc. The first adhesive layer 21 and the second adhesive layer 31 are any one of acrylic adhesive or epoxy resin adhesive.

[0025] During the preparation process, firstly take the core layer 1, the upper skin layer 2 and the lower skin layer 3, place the lower skin layer 3 under the core layer 1, then take the upper skin layer 2 and place it on the core layer 1, and finally hot press the core layer 1, the upper skin layer 2 and the lower skin layer 3 at the same time, so that the upper skin layer 2 and the lower skin layer 3 are bonded to the core layer 1 through the first adhesive layer 21 and the second adhesive layer 31. At the same time, the parts of the upper skin layer 2 and the lower skin layer 3 that are larger than the core layer 1 are bonded to each other through the first adhesive layer 21 and the second adhesive layer 31 to form edge sealing, so as to obtain the aerogel felt.

[0026] In the utility model, the upper skin layer 2 and the lower skin layer 3 are both set to be larger than the core layer 1, a first adhesive layer 21 is coated on the upper skin layer 2, and a second adhesive layer 31 is coated on the surface of the lower skin layer 3, and the core layer 1, the upper skin layer 2 and the lower skin layer 3 are simultaneously hot-pressed so that the upper skin layer 2 and the lower skin layer 3 are tightly bonded to the core layer 1 through their own adhesives to seal the upper and lower surfaces of the core layer 1, and at the same time, the parts of the upper skin layer 2 and the lower skin layer 3 that are larger than the core layer 1 are hot-pressed to bond them to form a sealing edge 4 to seal the side of the core layer 1, so as to avoid the phenomenon of powdering of the aerogel felt (i.e., the phenomenon of the aerogel layer on the surface of the core layer 1 breaking and falling) affecting its thermal insulation performance.

[0027] like Figure 3-Figure 4 As shown, it is the second embodiment of the present invention. The difference from the first embodiment is that the upper skin layer 2 and the lower skin layer 3 are formed by folding a film in half. During the preparation process, the core layer 1, the upper skin layer 2 and the lower skin layer 3 are first taken, the core layer 1 is placed between the upper skin layer 2 and the lower skin layer 3, and one side of the core layer 1 and the connection between the upper skin layer 2 and the lower skin layer 3 are stopped against each other, and finally the core layer 1, the upper skin layer 2 and the lower skin layer 3 are hot pressed at the same time, so that the upper skin layer 2 and the lower skin layer 3 are bonded to the core layer 1. At the same time, the connection between the upper skin layer 2 and the lower skin layer 3 is bonded to one side of the core layer 1, and the other three sides of the upper skin layer 2 and the lower skin layer 3 that are larger than the core layer 1 are bonded to each other through hot pressing to form a sealed edge 4 to obtain an aerogel felt.

Claims

1. A packaged aerogel felt, characterized in that: include: A core layer (1) comprises a substrate and an aerogel composited on the substrate, wherein a hydrophobic layer is provided on the surface of the core layer (1); An upper epidermis layer (2), one side of the upper epidermis layer (2) being bonded with a first adhesive layer (21), and the upper epidermis layer (2) being bonded to the upper surface of the core layer (1) via the first adhesive layer (21); A lower skin layer (3), one side of the lower skin layer (3) being bonded with a second adhesive layer (31), and the lower skin layer (3) being bonded to the lower surface of the core layer (1) via the second adhesive layer (31); The sizes of the upper skin layer (2) and the lower skin layer (3) are both larger than the core layer (1); the core layer (1), the upper skin layer (2) and the lower skin layer (3) are bonded to each other via a first adhesive layer (21) and a second adhesive layer (31); the edges of the upper skin layer (2) and the lower skin layer (3) are bonded to each other to form a sealed edge (4), so that the upper skin layer (2) and the lower skin layer (3) form a sealed package for the core layer (1) via the sealed edge (4).

2. The encapsulated aerogel felt according to claim 1, characterized in that: The upper skin layer (2) and the lower skin layer (3) are any one of polyester film, polyimide, polyvinyl chloride, polyethylene, polypropylene, and polycarbonate organic film materials.

3. The encapsulated aerogel felt according to claim 1, characterized in that: The thickness of the upper epithelial layer (2) and the lower epithelial layer (3) are both 0.1 mm to 0.3 mm.

4. The encapsulated aerogel felt according to claim 1, characterized in that: The first adhesive layer (21) and the second adhesive layer (31) are acrylic adhesive or epoxy resin adhesive.

5. The encapsulated aerogel felt according to claim 1, characterized in that: A compatible layer is provided on the surface of the core layer (1), and the compatible layer is used to improve the bonding force between the core layer (1) and the upper skin layer (2) and the lower skin layer (3).

6. The encapsulated aerogel felt according to any one of claims 1 to 5, characterized in that: The substrate is one or more of foam, glass fiber, ceramic fiber, pre-oxidized silk fiber, and mullite fiber felt.

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