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Ultrathin heat insulation film

A thermal insulation film, ultra-thin technology, applied in the direction of coatings, layered products, synthetic resin layered products, etc., can solve the problems of low porosity, insufficient flexibility, thickness of thermal insulation film, etc., to reduce thermal conductivity Effect

Pending Publication Date: 2019-04-30
深圳德宝天成科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these aerogel-containing insulation films are thick and often not flexible enough, limiting their use in many applications
And there is no protective film on the outside of the airgel layer in other prior art, resulting in poor weather resistance of the thermal insulation film
There are also some aerogels produced by the prior art with low porosity and high thermal conductivity, so that the overall thermal conductivity of the heat insulation film made cannot be further reduced.

Method used

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Embodiment 1

[0036] like figure 1 As shown, the present invention provides an ultra-thin heat insulation film 100, which includes a substrate layer 11, an adhesive layer 12, a heat insulation layer 13 and a protection layer 14 in sequence from bottom to top.

[0037] Wherein the substrate layer 11 is a PET film with a thickness of 40 μm, a visible light transmittance ≥ 89%, and a haze ≤ 1.5.

[0038] The adhesive layer 12 is polyurethane hot melt adhesive with a thickness of about 1.5 μm.

[0039] The heat insulating layer 13 includes an airgel layer 131 and a metal oxide layer 132 . The airgel layer 131 is adhered to the surface of the substrate layer 11 through the adhesive layer 12 , and the metal oxide layer 132 is coated on the surface of the airgel layer 131 by coating. The total thickness of the heat insulating layer 13 is 1.05 μm. The airgel layer 131 has a thickness of 1 μm, and the metal oxide layer 132 has a thickness of 50 nm.

[0040] combine figure 2 As shown, the airgel ...

Embodiment 2

[0045] In this embodiment, the substrate layer 11 is an ETFE film with a thickness of 40 μm, a visible light transmittance ≥ 89%, and a haze ≤ 1.5. The adhesive layer 12 is a temperature-resistant epoxy adhesive with a thickness of about 1.2 μm.

[0046] The total thickness of the heat insulating layer 13 is 2.05 μm. The airgel layer 131 has a thickness of 2 μm, and the metal oxide layer 132 has a thickness of 40 nm. The airgel layer 131 is a doped silica airgel with a porosity of 75%. Titanium dioxide can be doped with titanium ions by co-precipitation method of complexing agent when preparing silica sol, and then the aerogel doped with titanium dioxide can be obtained through gelation, solvent replacement, supercritical carbon dioxide drying method and high temperature treatment. In this embodiment, the doping amount of titanium dioxide is 0.02%. The pores 21 and the isolated cavities 22 inside the silica airgel are filled with CO 2 Gas, the diameter of the cavity 22 is ...

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Abstract

The present invention relates to an ultrathin heat insulation film. The ultrathin heat insulation film comprises a substrate layer, an adhesive layer, a heat insulation layer and a protective layer which are arranged from bottom to top; the substrate layer is a flexible polymer film having a thickness of 15-40 [mu]m; the adhesive layer is a high temperature-resistant adhesive; the heat insulationlayer comprises an aerogel layer and a metal oxide layer, and the aerogel layer is bonded to the surface of the substrate layer by the adhesive layer; the metal oxide layer is a high-refractive indexmetal oxide, and the metal oxide layer covers the surface of the aerogel layer; the total thickness of the heat insulation layer is less than 3 [mu]m; and the protective layer covers the surface of the metal oxide layer, and has a thickness of 10-30 nm. The overall thickness of the heat insulation film is only 50 [mu]m or less, the heat conductivity is very low, and the ultrathin heat insulation film can be attached to the surface of a complicated shape object or applied to occasions having strict thickness limit on the heat insulation film, and can be used to produce window films, vacuum cupsheat insulation lunch boxes, outdoor sleeping bags and other products.

Description

technical field [0001] The invention relates to the technical field of heat insulation materials, in particular to a flexible heat insulation film, which can be applied to the fields of daily necessities such as car window film, thermos cups, heat preservation lunch boxes, and outdoor sleeping bags. Background technique [0002] Due to the rapid depletion of fossil fuels and the surge in greenhouse gas emissions, energy consumption and environmental pollution have become global concerns. These challenges are currently being mitigated by exploring renewable energy sources and improving the energy efficiency of conventional supplies / technologies. Therefore, in recent years, people have paid more and more attention to the research on energy management and energy consumption minimization. Among them, the technology of reducing heat loss through heat insulation / insulation materials plays an important role in improving energy efficiency. The thermal insulation performance of a m...

Claims

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Application Information

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IPC IPC(8): B32B7/12B32B9/00B32B9/04B32B27/06B32B27/32B32B33/00
CPCB32B7/12B32B9/00B32B9/045B32B27/06B32B27/322B32B33/00B32B2307/304B32B2307/418B32B2255/205B32B2255/20
Inventor 余志强
Owner 深圳德宝天成科技有限公司
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