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Nano barrier film and preparation method thereof

A barrier film, nano-technology, applied in the field of nano-barrier film and its preparation, can solve the problems of water and gas barrier performance decline, boundary heat leakage increase, poor durability, etc., to achieve water and gas barrier performance improvement, edge thermal bridge effect Weak, effect of improving surface density

Pending Publication Date: 2018-05-29
福建菲尔姆科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Naturally, using two, three, or even more layers of VMPET film for compounding can improve the water and gas resistance of the outer material to a certain extent, but at the same time there are problems that the outer material after compounding is too thick and the boundary heat leaks obvious
Due to the increase in the thickness of the outsourcing material or the use of a metallized film in the outsourcing material, one is that the outsourcing material is not easy to fold and use, or the stress of the bending part after the folding is high and easy to puncture; the other is that the thickness of the folding part is doubled, Boundary heat leakage caused by hemming increases sharply, which affects the service life of vacuum insulation products
[0008] At the same time, although VMPET has certain water and gas barrier properties in the early stage, this kind of film has problems such as poor adhesion of the aluminum coating layer and easy transfer of the aluminum coating. Water and gas barrier performance decline, poor durability and other issues

Method used

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  • Nano barrier film and preparation method thereof
  • Nano barrier film and preparation method thereof
  • Nano barrier film and preparation method thereof

Examples

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Embodiment 1

[0029] refer to figure 1 , a nano-barrier film, from bottom to top is an aluminum-plated base film 1, an undercoat 2, a barrier coating 3, and a nano-coating 4.

[0030] The aluminized base film 1 is preferably an aluminized polyethylene terephthalate film (VMPET) with a thickness of 12 μm, and may also be a 25 μm aluminized cast polypropylene film (VMCPP) or a 20 μm biaxially oriented polypropylene film. One of the films (VMBOPP). The aluminum-coated base film 1 is not limited to the above-mentioned three types. A suitable plastic base material can be vapor-deposited with metal, has a low thermal conductivity, and has a certain water- and gas-blocking ability. The aluminized base film 1 is already a very mature film with a certain ability to block water and gas, and it appears as the structure with the main barrier ability in the traditional composite film layer of the outer packaging material in the field of vacuum insulation panels. However, films such as the aluminized b...

Embodiment 2

[0039] refer to figure 2 , the difference between this embodiment and embodiment 1 is: the barrier coating 3' also includes inorganic nanoparticles with a specific gravity of 5-9%, and the inorganic nanoparticles are silicon oxide nanoparticles with a particle size of 10~50nm. Due to the fluidity and surface tension of the barrier coating 3' coating liquid, after drying, the microscopic state of the coating surface is not smooth and flat, and the nano particles are dispersed and filled on the surface of the coating film to reduce its roughness and improve the coating during vacuum evaporation. of adhesion.

[0040] This embodiment further provides the preparation method of the above-mentioned nano-barrier film, including the following steps:

[0041] 1) Coating a layer of base coat 2 paint on the aluminum-plated surface of the aluminum-plated base film 1, the coating amount is 0.5-1.0g / m2, and drying.

[0042] The aluminized base film 1 is preferably an aluminized polyethy...

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Abstract

The invention provides a nano barrier film and a preparation method thereof. The nano barrier film is sequentially provided with an aluminizing base film layer , a bottom coating layer, a barrier coating layer and a nano clad layer from bottom to top. The bottom coating layer refers to acrylate or polyurethane coating, and the solid content is 30-40%; the barrier coating layer refers to acrylate or polyurethane coating, and the solid content is 50-70%. The invention further provides the preparation method of the nano barrier film, The thickness of the prepared nano barrier film is not significantly increased, the aluminizing base film layer is good in aluminum layer adhesion, excellent in water blocking and air blocking performance, meanwhile the durability of the film is good, and the service life is very long.

Description

technical field [0001] The invention relates to a nanometer barrier film and a preparation method thereof, belonging to the technical field of vacuum heat insulation panels. Background technique [0002] Vacuum insulation panel (referred to as VIP) is a new type of high-efficiency energy-saving heat insulation material that has developed rapidly in the world in recent years. It is mainly composed of outsourcing materials, core materials and getters. The core material is a filling material that supports the vacuum chamber and has low thermal conductivity, usually flame wool, rock wool, glass fiber chopped strands, fumed silica, etc.; the outsourcing material is to isolate air and water from entering the vacuum chamber and ensure Vacuum material; The getter is a material that absorbs the residual gas in the cavity or the gas and water that penetrates into the cavity through the membrane, and maintains the vacuum in the cavity. [0003] The core material and a small amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D133/04C09D175/04C09D7/61C23C14/24C23C14/10C23C14/08C08L67/02C08L23/12
CPCC09D133/04C09D175/04C23C14/081C23C14/10C23C14/24C08J7/042C08J2323/12C08J2367/02C08K3/34C08K2201/011
Inventor 张翠云马向阳
Owner 福建菲尔姆科技有限公司
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