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Durable solar mirror films

A technology of mirror reflection film and solar energy, which is applied in the direction of solar thermal energy, solar thermal power generation, solar collectors, etc., and can solve the problem that the working temperature is not so high

Active Publication Date: 2015-03-25
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The principle of operation is very similar to a concentrated solar power unit, but due to the concentration of sunlight, the operating temperature is not as high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

[0083] testing method :

[0084] Coefficient of hygroscopic expansion (CHE) : Hygroscopic swelling was measured using a Dynamic Mechanical Analyzer (DMA) (Model "Q800" from TA Instruments) in conjunction with a DMA-RH accessory (from TA Instruments). Displacement (in m / m) was measured at a constant temperature of 25°C with varying relative humidity increases of about 20% and about 80%. CHE was calculated using the change in sample size caused by changes in humidity. Results are expressed as parts per million (ppm) / percent relative humidity (RH%).

[0085] Neutral Salt Spray Test (NSS)

[0086] According to ISO 9227:2006, "Corrosion tests in artificial atmospheres--Salt spray tests" (Corrosion tests in artificial atmospheres--Salt spray tests), except that the results are recorded as visual observations after various times The comparative examples and examples were evaluated for corrosion.

example 1

[0090] Multilayer optical films were made as follows: Multilayer optical laminates (described below) were made by coextruding a first polymer layer and a second polymer layer through a multilayer polymer melt manifold to produce Multilayer melt flow of 550 alternating layers. Two skin layers, each having a thickness of approximately 4 microns, were also coextruded as protective layers on each side of the optical layer stack. The multi-layer melt stream is cast onto chilled casting rolls to produce a multi-layer cast web. The multilayer cast web was then heated in a tenter oven to a temperature of about 105°C before biaxially oriented to a draw ratio of 3.8x3.8. A reflective layer of silver approximately 100 nm thick was vapor deposited onto the film substrate. An approximately 80 nm thick layer of copper was coated onto the silver layer. Apply 25 microns of acrylic adhesive to the copper layer. The resulting multilayer optical film was bonded to an epoxy-coated aluminum su...

example 2

[0095] Multilayer optical films were made as follows: Multilayer optical laminates (described below) were made by coextruding a first polymer layer and a second polymer layer through a multilayer polymer melt manifold to produce Multilayer melt flow with 150 alternating layers. Two skin layers, each having a thickness of approximately 4 microns, were also coextruded as protective layers on each side of the optical layer stack. The multi-layer melt stream is cast onto chilled casting rolls to produce a multi-layer cast web. The multilayer cast web was then heated in a tenter oven to a temperature of about 105°C before biaxially oriented to a draw ratio of 3.8x3.8. A reflective layer of silver approximately 100 nm thick may be vapor deposited onto the film substrate. An approximately 80 nm thick layer of copper may be coated onto the silver layer. A 25 micron acrylic adhesive can be applied to the copper layer. The resulting multilayer optical film can be bonded to an epoxy-...

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Abstract

The present disclosure generally relates to durable solar mirror films, methods of making durable solar mirror films, and constructions including durable solar mirror films. In one embodiment, the present disclosure relates to a solar mirror film comprising: a multilayer optical film layer including having a coefficient of hygroscopic expansion of less than about 30 ppm per percent relative humidity; and a reflective layer having a coefficient of hygroscopic expansion.

Description

[0001] Government License Rights [0002] The United States Government has rights in at least some of the inventions described in this patent application pursuant to DE-AC36-08GO28308 (CRADA No. 08-316) issued by the United States Department of Energy. technical field [0003] The present disclosure generally relates to durable solar specular films, methods of making durable solar specular films, and constructions that include durable solar specular films. Background technique [0004] Renewable energy refers to energy derived from renewable natural resources such as sunlight, wind, rain, tides, and geothermal heat. As technology advances and the global population grows, the demand for renewable energy has increased dramatically. Although fossil fuels provide the vast majority of energy consumption today, these fuels are non-renewable. The global dependence on these fossil fuels has raised concerns not only about their consumption, but also about the environmental concern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/00B32B33/00G02B5/08F24S23/70
CPCB32B33/00B32B37/153B32B2037/246B32B2038/0028B32B2038/0092B32B2307/40G02B5/0808F24S23/82G02B1/14Y02E10/40Y02E10/52B32B5/00B32B7/02B32B7/12B32B15/08G02B5/08H01L31/042F24S23/70G02B1/10G02B1/105G02B5/0875H02S40/22
Inventor M·B·奥尼尔A·J·亨德森T·J·赫布林克R·K·卡泰瑞景乃勇D·诺斯E·M·彼得森
Owner 3M INNOVATIVE PROPERTIES CO
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