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Durable low emissivity window film constructions

A radiation curing and irradiation technology, applied in building structures, windows/doors, building components, etc., can solve problems such as low emissivity

Active Publication Date: 2019-11-26
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While a typical glass or plastic window film surface has a thermal emissivity in the range of 0.84 to 0.91, insulating materials such as aluminum foil can have emissivity as low as 0.02

Method used

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  • Durable low emissivity window film constructions
  • Durable low emissivity window film constructions
  • Durable low emissivity window film constructions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[2667] The present invention is described in more detail in the following examples which are only intended to serve as illustrations, because many modifications and variations within the scope of the present invention will be apparent to those skilled in the art. Unless otherwise specified, all parts, percentages and ratios mentioned in the following examples are by weight. Unless otherwise indicated, reagents were purchased from Sigma-Aldrich Corporation (St. Louis, MO), St. Louis, Missouri.

[2668] material

[2669]

[2670]

[2671] Emissivity

[2672] The emissivity was measured with an AE1 emissivity meter according to ASTM C1371, and it was read directly from an RD1 calibrated digital voltmeter, both of which were purchased from the Devices and Services Company (Dallas, TX) of Dallas, Texas.

[2673] Visible light transmittance

[2674] The spectral properties of the film were measured in a Perkin Elmer Lambda 1050 spectrophotometer according to ASTM E903. The transmission ...

preparation example 1

[2696] Into a 500 mL round bottom flask equipped with an overhead stirrer were added 140.52 g of 3-trimethoxysilylpropyl isocyanate and 0.22 g of DBTDL and heated to 55°C. Use a dropping funnel to add 79.48 g of 2-hydroxyethyl acrylate, which takes about one hour. At a total time of about 4 hours, the products shown below were separated and bottled:

[2697]

Embodiment 1

[2714] A multilayer optical stack containing zinc tin oxide, silver alloy, silicon oxide or oxynitride and a radiation cured acrylate layer is deposited on the PET film substrate. Use something similar to WO2009085741 image 3 The vacuum coating equipment described in forms all individual layers without breaking the vacuum. Will be under the trade name Melinex TM 454 0.075 mm thick PET film purchased from DuPont Teijin Films was used as the substrate. No distinction is made between the sides of the substrate to be coated. The deposition sequence of the layers is as follows:

[2715] Layer 1: Load the substrate roll into the vacuum coater, and the chamber is pumped down to less than 1×10 -4 The base pressure of support. Expose the film to N using a titanium target operating at 200W 2 Plasma pretreatment process. The acrylate monomer mixture of SR833S (Arkema) and CN147 (Arkema) with a ratio of 94:6 is flashed, condensed on a PET film substrate, and electron beam is used Sour...

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Abstract

In certain embodiments, the present disclosure relates to low emissivity films and articles comprising them. Other embodiments are directed to methods of reducing emissivity in an article comprising the use of low emissivity films. In some embodiments, the low emissivity films comprise a metal layer and a pair of layers, one comprising a metal oxide such as zinc tin oxide and the other layer comprising a silicon compound, adjacent each of the two sides of the metal layer. This type of assembly may serve various purposes, including being used as a sun control film. These constructions may be used, for example, as window films on glazing units for reducing transmission of infrared radiation across the film in both directions.

Description

[0001] In certain embodiments, the present disclosure relates to low emissivity films and articles including the low emissivity films. Other embodiments relate to a method of reducing the emissivity of an article, the method comprising using a low emissivity film. In some embodiments, the low emissivity film includes a metal layer and a pair of layers, one layer includes a metal oxide such as zinc tin oxide, and the other layer includes a silicon compound adjacent to each of the two sides of the metal layer. This type of module can be used for a variety of purposes, including as solar insulation film. These structures can be used, for example, as a window film on a glazing unit to reduce the transmembrane transmission of infrared radiation in two directions. Background technique [0002] Various methods are used to reduce energy consumption in commercial or residential buildings and the automotive industry to help maintain a comfortable temperature in the passenger cabin with mi...

Claims

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Application Information

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IPC IPC(8): C09J7/30B32B15/04
CPCC08K3/22C08K2003/282C09J2400/163C09J2433/006C09J7/29B32B2255/20B32B27/36B32B2307/204B32B2255/205B32B7/02B32B27/34B32B2250/24B32B27/30B32B2307/704B32B2255/26B32B27/08B32B7/06B32B27/283B32B27/304B32B27/365B32B2270/00B32B2307/712B32B2307/414B32B2307/73B32B27/302B32B27/286B32B2307/422B32B2307/584B32B2255/10B32B2255/28B32B27/40B32B2307/714B32B2307/732B32B2419/00B32B2307/554B32B27/281B32B2307/42B32B27/32B32B27/308B32B2307/412B32B7/12B32B27/325B32B2307/748B32B2307/402C09J2301/122C09J2301/41C09J2301/302C08J7/0423G02B5/208G02B5/26E06B2009/2417C09J2467/006B32B33/00E06B9/24C09J2301/16C23C14/18C23C14/02C23C14/0676C23C14/28B32B2307/416C09J2301/312C23C14/35C23C14/081C23C14/086C23C14/12
Inventor 拉古纳特·帕迪亚斯格雷戈里·F·金斯蒂芬·P·梅基
Owner 3M INNOVATIVE PROPERTIES CO
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