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Barrier film and vacuum insulating board adopting same

A barrier film and vacuum aluminum plating technology, applied in vacuum evaporation plating, ion implantation plating, coating, etc., can solve the problems of harsh barrier properties and adverse effects of barrier films, and achieve improved gas barrier performance and heat sealing conditions Reduced, excellent oxygen resistance effect

Active Publication Date: 2013-04-24
中亨新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The barrier film using the above-mentioned aluminized film as the gas barrier layer has relatively excellent barrier properties, but the inventors of the present invention have found in practice that due to the long service life of the barrier film in some occasions, such as the service life of vacuum insulation panels It can be as long as several years or even more than ten years. In order to avoid the adverse effects of oxygen and water vapor accumulated through the barrier film during long-term use, it is necessary to put forward more stringent requirements on the barrier performance of the barrier film. Barrier films are still difficult to meet the requirements

Method used

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  • Barrier film and vacuum insulating board adopting same
  • Barrier film and vacuum insulating board adopting same
  • Barrier film and vacuum insulating board adopting same

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Barrier film described in this embodiment such as figure 1 As shown, its thickness is 110 μm, and it is composed of a surface layer, a gas barrier layer and a heat-sealing layer, wherein the surface layer is a PET film layer, and the heat-sealing layer is a low-density PE film layer with a thickness of 70 μm. The gas-barrier layer is located between the surface layer and the heat-sealing layer; the gas-barrier layer is composed of 3 layers of the aluminized PET film layer, and the aluminum-coated layer and the aluminum-coated PET film layer of each layer are The thickness ratio of described aluminized PET film layer is 1:350, and wherein, the preparation technology of described aluminized PET film comprises the steps:

[0040] (1) Place the PET base film in the aluminum plating chamber for vacuum aluminum plating. During the vacuum aluminum plating process, the temperature in the aluminum plating chamber is 1300°C, and the vacuum degree is 2×10 -2 Pa, the unwinding spe...

Embodiment 2

[0044] Barrier film described in this embodiment such as figure 1 As shown, its thickness is 110 μm, and it is composed of a surface layer, a gas barrier layer and a heat-sealing layer, wherein the surface layer is a PET film layer, and the heat-sealing layer is a low-density PE film layer with a thickness of 70 μm. The gas-barrier layer is located between the surface layer and the heat-sealing layer; the gas-barrier layer is composed of 3 layers of the aluminized PET film layer, and the aluminum-coated layer and the aluminum-coated PET film layer of each layer are The thickness ratio of described aluminized PET film layer is 1:400, and wherein, the preparation technology of described aluminized PET film comprises the steps:

[0045] (1) Use 10000V / m 2 The high-frequency AC voltage is used to corona-treat the PET film to obtain a PET base film;

[0046] (2) Place the PET base film in the aluminum plating chamber for vacuum aluminum plating. During the vacuum aluminum plating...

Embodiment 3

[0050] The barrier film described in this embodiment has a thickness of 105 μm and is composed of a surface layer, a gas barrier layer and a heat-sealing layer bonded together, wherein the surface layer is a PET film layer, and the heat-sealing layer is a low-density PE film with a thickness of 40 μm. film layer, the gas barrier layer is located between the surface layer and the heat-sealing layer; the gas barrier layer is composed of 2 layers of the aluminized PET film layer, each layer of the aluminized PET film layer The thickness ratio of aluminized layer and described aluminized PET film layer is 1:450, and wherein, the preparation technology of described aluminized PET film comprises the steps:

[0051] (1) Use 5000V / m 2 The high-frequency AC voltage is used to corona-treat the PET film to obtain a PET base film;

[0052] (2) Place the PET base film in the aluminum plating chamber for vacuum aluminum plating. During the vacuum aluminum plating process, the temperature i...

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Abstract

The invention provides a barrier film and a vacuum insulating board compounded by utilizing the barrier film. The barrier film is formed by adhering a surface layer, a gas barrier layer and a heat seal layer, wherein the gas barrier layer consists of at least one aluminum-plated polyethylene terephthalate (PET) film layer. The preparation process of the aluminum-plated PET film comprises the following of: (1) arranging a PET substrate film in an aluminum-plating chamber for performing vacuum aluminum plating, and forming an aluminum-plating layer on the surface of the PET substrate film; and (2) introducing nitrogen into the aluminum-plating chamber in stages after aluminum plating is ended, introducing the nitrogen until the nitrogen pressure is 800-1200pa at the first time, maintaining for 8-12 hours, introducing the nitrogen until the nitrogen pressure is 1300-1500pa, maintaining for at least 12 hours, and obtaining the aluminum-plated PET film. Compared with the conventional aluminum-plated film prepared by the prior art, the aluminum-plated film has the advantages that the overall barrier performance of the barrier film can be effectively improved, so that the requirements can be met in occasions with strict barrier performance requirement.

Description

technical field [0001] The invention relates to a barrier film and a vacuum heat insulation panel using the barrier film, belonging to the technical field of vacuum heat insulation panels. Background technique [0002] Barrier films are used in the packaging fields of medicine, food, cosmetics and the like as well as in the preparation of vacuum insulation panels because of their excellent barrier properties to water vapor and oxygen. Vacuum insulation panels are a type of insulation panels. [0003] As far as its structure is concerned, it is composed of a filling core material with good heat insulation performance and a barrier film. Heat sealing of the skin film. The vacuum insulation panel can effectively avoid heat transfer caused by air convection, and the thermal conductivity is greatly reduced. On the basis of the same thermal insulation requirements, compared with ordinary insulation panels, vacuum insulation panels can effectively reduce the thickness of insulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/09B32B15/20C23C14/18C23C14/24
Inventor 徐双平高军
Owner 中亨新型材料科技有限公司
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