CN217258821U - Multilayer composite integrated heat-insulation microporous membrane - Google Patents

Abstract

The utility model relates to a compound thermal-insulated microporous membrane of integration of multilayer, including the ventilative rete that flexible aerogel layer and aerogel layer upper and lower surface curtain coating formed respectively, the upper surface of going up ventilative rete and the lower surface of ventilative rete down all coat the rice ceramic layer that has the nano particle to constitute. The surface of aerogel layer is the roughness of unsmooth profile of tooth structure and prolongs the seamless firm bonding of ventilative rete that forms, and ventilative rete is microporous structure, for aerogel layer provides the support, and the nano-ceramics rete has the nanopore structure, improves the heat-proof quality and high temperature resistant, the fire-retardant characteristic of complex film, improves the dimensional stability of complex film, protects aerogel layer and ventilative rete simultaneously, slows down ageing rate, makes the complex film have higher life. In addition, the aerogel layer and the breathable film layer are both made of PE/PP materials.

Description

Multilayer composite integrated heat insulation microporous membrane

Technical Field

The utility model relates to a thermal-insulated membrane technical field especially relates to a compound thermal-insulated microporous membrane of multilayer that possesses multiple comprehensive properties such as thermal-insulated, ventilative, high temperature resistant, fire-retardant.

Background

At present, the heat insulation film is widely applied to various industries and fields such as buildings, automobiles and the like, through the use of the heat insulation film, the damage of ultraviolet rays in sunlight to people can be reduced, the aging speed of materials can be slowed down, the entering of solar heat radiation can be blocked, and the effect of energy conservation is achieved.

The current thermal-insulated membrane kind is more in the market, and the most concrete better thermal-insulated heat preservation effect that insulates against heat, however, current thermal-insulated membrane function is also more single, because of the thickness and the nature secret nature of thermal-insulated membrane for traditional thermal-insulated membrane ventilation effect is not good, still has the flammability because of traditional thermal-insulated membrane material itself, hardly possesses good high temperature resistant, fire-retardant and waterproof, ventilative comprehensive physical properties simultaneously.

In addition, the high temperature resistant heat insulation film on the market is usually simply pressed or bonded by using an adhesive. However, when the heat insulating film is used in a high-temperature environment, the heat insulating film is very easy to crack, deform, bubble and the like due to the material characteristics of the film material or the adhesive such as hot melting, shrinkage and expansion, and the like, so that the service life is short.

Due to the lack of comprehensive performance and the defect of single performance, the service life of the heat-insulating film is influenced by the change of high and low temperatures of the use environment in long-term use, and on the other hand, the high temperature resistance and the flame retardant property of the existing heat-insulating film need to be further improved in consideration of fire safety. Therefore, the design of the heat insulation film with high temperature resistance and flame retardant property has very high practical significance and social value.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a compound thermal-insulated microporous membrane of integration of multilayer has better air permeability and heat-proof quality, and also difficult separation fracture, its comprehensive properties is good under the high temperature environment.

The utility model adopts the technical proposal that: a multilayer composite integrated heat-insulation microporous membrane comprises an aerogel layer positioned in the center of a heat-insulation microporous membrane body, wherein the upper surface and the lower surface of the aerogel layer are rough surfaces with concave-convex structures; the upper surface and the lower surface of the aerogel layer are respectively adhered with a breathable film layer formed by tape casting and pressing, the breathable film layer and the aerogel layer are made of the same material, and the breathable film layer has a microporous structure; the upper surface of the upper breathable film layer and the lower surface of the lower breathable film layer are coated with nano ceramic film layers, and the nano ceramic film layers have nano-pore structures.

As a further limitation to the above technical solution, the thickness of the aerogel layer is 10 micrometers to 100 micrometers, the rugged structure of the rough surface is a staggered rugged tooth-shaped structure or a raised structure arranged at intervals, and the rugged height of the rough surface is 1% to 20% of the thickness of the aerogel layer.

As a further limitation to the technical scheme, the thickness of the breathable film layer is 5-50 microns, the pore diameter of the microporous structure is 200 nanometers-1 micron, and the porosity is 10% -60%.

As a further limitation to the technical scheme, the thickness of the nano ceramic film layer is 50 nanometers to 5 micrometers, the pore diameter of the nano pore structure is 1 nanometer to 500 nanometers, and the porosity is 5 percent to 30 percent.

As a further limitation to the above technical solution, the aerogel layer and the breathable film layer are made of any one of Polyethylene (PE), polypropylene (PP) and Polyimide (PI).

Adopt above-mentioned technique, the utility model has the advantages of: the air-permeable film layer formed by casting and pressing on the surface of the aerogel film can be seamlessly bonded with the aerogel layer, the firm bonding degree is achieved, and the toughness strength of the air-permeable film layer and the finished composite film is enhanced. The aerogel layer and the breathable film layer are made of the same PE or PP materials, and the concave-convex structure is designed on the surface of the film of the aerogel layer, so that the bonding firmness degree of the breathable film layer and the aerogel layer is further increased, and the problems that the existing heat insulation film is easy to crack and deform in a high-temperature environment and the like are solved. The nano ceramic film layer coated on the surface of the breathable film layer enables the composite film to have the characteristics of high temperature resistance and flame retardance, improves the dimensional stability of the composite film, and is more convenient in the actual use of the composite film. The pore structure design of each layer in the heat insulation microporous membrane not only improves the heat insulation performance of the composite membrane, but also increases the air permeability of the composite membrane. The PE, PP or PI materials are widely applied to film products and plastic products, relatively speaking, the price is low, and good economic benefits are achieved.

Drawings

FIG. 1 is a level structure diagram of the multi-layer composite integrated heat-insulating microporous membrane of the present invention;

FIG. 2 is a schematic view of the rugged-tooth-shaped structural surface of the aerogel layer of the present invention;

FIG. 3 is a schematic view of the surface of the rough surface of the aerogel layer of the present invention with the structure of the protrusions;

in the figure: 1-a nano ceramic film layer; 2-a breathable film layer; 3-an aerogel layer; 301-rough surface.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-3, the multilayer composite integrated heat-insulating microporous membrane comprises an aerogel layer 3 located at the center of a heat-insulating microporous membrane body and air-permeable membrane layers 2 attached to the upper and lower surfaces of the aerogel layer and formed by casting and pressing. The upper and lower surface of aerogel layer 3 is rough surface 301 that has concave-convex structure, and ventilative rete 2 that forms at rough surface curtain coating pressfitting can bond with aerogel layer 3 seamless, and reaches the degree of firm bonding, has still strengthened the toughness strength of ventilative rete 2 itself and finished product complex film in addition.

The aerogel layer 3 is a flexible film layer with a thickness of 10-100 μm, and the concave-convex structure of the upper and lower rough surfaces 301 of the aerogel layer 3 is a staggered concave-convex tooth structure or a convex structure arranged at intervals, such as the surface structure illustrated in fig. 2-3. The rough surface 301 has a concave-convex height of 1-20% of the thickness of the aerogel layer. The rough surface 301 of the concave-convex tooth-shaped structure further increases the bonding firmness degree of the air-permeable film layer formed by tape casting and the aerogel layer, and solves the problems that the heat insulation film is easy to crack and deform in a high-temperature environment. The pore-making agent is added in the preparation process of the aerogel, and then the porous aerogel can be prepared by extraction. The aerogel itself is a porous structure with a relatively high porosity.

The breathable film layer 2 provides structural support to the flexible aerogel layer. The air-permeable membrane layer 2 is processed into a membrane layer with a microporous structure through a pore-making step, wherein the thickness of the membrane layer is 5-50 micrometers, the pore diameter of the microporous structure is 200 nanometers-1 micrometer, and the porosity of the microporous structure is 10% -60%.

The upper surface of the upper breathable film layer and the lower surface of the lower breathable film layer are both coated with the nano ceramic film layer 1. The thickness of the nano ceramic film layer 1 is 50 nanometers to 5 micrometers. The nano ceramic film layer 1 is composed of nano particles and has a pore structure with nano pores, the pore diameter of the nano pores is 1 to 500 nanometers, and the porosity is 5 to 30 percent. The nano ceramic film has high hardness, high temperature resistance, oxidation resistance and good heat insulation performance, so that the composite film has better heat insulation effect, has the characteristics of high temperature resistance and flame retardance, overcomes the telescopic characteristics of an aerogel layer and a breathable film layer film by utilizing the rigidity characteristic of the nano ceramic film, improves the size stability of the composite film, and is more convenient in the actual use of the composite film. Meanwhile, the nano ceramic film layer plays a role in protecting the thin film materials of the aerogel layer and the breathable film layer, the aging speed of the aerogel layer and the breathable film layer is slowed down, and the composite film has longer service life.

In this embodiment, the aerogel layer 3 and the breathable film layer 2 are made of any one of Polyethylene (PE), polypropylene (PP) and Polyimide (PI). When the film layers made of the same materials are used in a high-temperature environment, the film layers have excellent interface binding property due to the mutual permeation of the materials, and are not easy to crack and separate, so that the problem that the service life of the existing heat insulation film is short in the high-temperature environment is further solved.

In the manufacturing process of the multilayer composite integrated heat-insulation microporous membrane, firstly, a flexible aerogel film is prepared, and a rough surface 301 with a concave-convex tooth-shaped structure is formed on the surface of the aerogel film. In the process of preparing the aerogel, a pore-forming agent is added, and then extraction is carried out, so that the aerogel film with a porous structure can be prepared by the process. In the aerogel film forming process, the rough surface of the concave-convex tooth-shaped structure is subjected to casting of one layer of breathable film layer, and the aerogel film is subjected to casting of the other layer of breathable film layer after being turned. In order to further enhance the bonding strength of the aerogel layer and the breathable film layer, the aerogel layer and the breathable film layer are pressed once after double-sided tape casting. Then the breathable film layer is processed into a film layer with a micropore structure through a hole making step. And finally, respectively coating the surfaces of the upper and lower breathable film layers with nano ceramic film layers, wherein the nano ceramic film layers also form a pore structure with nano pores in the coating and forming process. The pore diameter and porosity of each film layer determine the heat insulation effect, and in the range of the pore diameter and the porosity in the embodiment, the heat insulation performance of the composite film achieves a better effect.

The implementation principle is as follows: the utility model discloses in, except that the nanometer ceramic layer, other retes all adopt the polyolefin material, preferably adopt PE, PP or PI material. Therefore, the aerogel layer and the breathable film layer which are made of the same material have excellent interface bonding performance, and the aerogel layer and the breathable film layer are bonded firmly by combining the processes of concave-convex rough surfaces and tape casting lamination, so that the two film layers are effectively bonded, the performance of the composite film is optimally reflected, and the composite film is not easy to separate and crack in a high-temperature environment. Then, a layer of nano ceramic material is coated while the high mechanical property and flexibility of the polyolefin material are utilized, so that the purposes of flame retardance and high temperature resistance are achieved. Therefore, the problems that the high-temperature-resistant heat-insulating film is short in service life and poor in comprehensive performance of the heat-insulating film in the prior art can be solved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be covered by the present invention within the technical scope of the present invention, and the technical solution obtained by replacing or changing the technical idea of the present invention with equivalents.

Claims (5)

1. A multilayer composite integrated heat insulation microporous membrane is characterized in that: the heat-insulation microporous membrane comprises an aerogel layer (3) positioned in the center of a heat-insulation microporous membrane body, wherein the upper surface and the lower surface of the aerogel layer (3) are rough surfaces (301) with concave-convex structures; the upper surface and the lower surface of the aerogel layer are respectively adhered with a breathable film layer (2) formed by tape casting and pressing, the breathable film layer (2) and the aerogel layer (3) are made of the same material, and the breathable film layer (2) has a microporous structure; the upper surface of the upper breathable film layer and the lower surface of the lower breathable film layer are respectively coated with a nano ceramic film layer (1), and the nano ceramic film layer (1) has a nano hole structure.

2. The multilayer composite integrated heat insulation microporous membrane according to claim 1, characterized in that: the thickness of the aerogel layer (3) is 10-100 microns, the concave-convex structure of the rough surface (301) is in a staggered concave-convex tooth-shaped structure or a convex structure arranged at intervals, and the concave-convex height of the rough surface is 1-20% of the thickness of the aerogel layer.

3. The multilayer composite integrated heat insulation microporous membrane according to claim 1, characterized in that: the thickness of the breathable film layer (2) is 5-50 microns, the pore diameter of the microporous structure is 200 nanometers-1 micron, and the porosity is 10-60%.

4. The multilayer composite integrated heat insulation microporous membrane according to claim 1, characterized in that: the thickness of the nano ceramic film layer (1) is 50 nanometers to 5 micrometers, the pore diameter of the nano pore structure is 1 nanometer to 500 nanometers, and the porosity is 5 percent to 30 percent.

5. The multilayer composite integrated heat insulation microporous membrane according to claim 1, characterized in that: the aerogel layer (3) and the breathable film layer (2) are made of any one of polyethylene, polypropylene and polyimide materials.

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