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Methods for manufacturing silver multilayered films and the articles obtained therefrom

A multi-layer film and silver technology, applied in layered products, chemical instruments and methods, natural mineral layered products, etc., can solve problems such as high coating production costs, high investment costs, and environmental problems

Inactive Publication Date: 2006-07-05
SABIC INNOVATIVE PLASTICS IP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development of coatings for surface decoration is generally considered expensive due to high investment costs for plant installation and maintenance and high associated coating production costs
In addition, the application of coatings to different production products also brings environmental problems, such as the release of volatile organic compounds into the air

Method used

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  • Methods for manufacturing silver multilayered films and the articles obtained therefrom
  • Methods for manufacturing silver multilayered films and the articles obtained therefrom
  • Methods for manufacturing silver multilayered films and the articles obtained therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0122] In this example, the aluminum flakes of Example 1 were "reinforced" by coating them with a transparent ceramic (such as silica or alumina) so that they were hard enough to maintain their aspect ratio during melt processing. Reinforced flakes are commercially available from Flex Products Inc. and coated by vacuum deposition. These reinforced aluminum flakes were run in polycarbonate in the same manner as in Comparative Example 1. Brightness (L * ) and change in brightness as a function of viewing angle (ΔL * ) are shown in Fig. 7(a) and (b) respectively. In Figures 7(a) and (b), it can be seen that the behavior of the reinforced alumina mimics that of the silver-painted specimens more closely than the unreinforced aluminum flakes used in Example 1. Figure 8(a) and (b) are transmission electron micrographs showing that the reinforced aluminum flakes did not suffer the same damage as the unreinforced aluminum flakes.

Embodiment 3

[0124] In this example, 5.4 wt% mica flakes, 0.6 wt% aluminum flakes, 0.01 wt% carbon black coated with titanium dioxide were added to the middle layer instead of the aluminum flakes. All three layers, that is to say the inner layer, the middle layer and the second layer, are made of polycarbonate. The three layers were coextruded in a similar manner to Example 1. The first layer of this example contained 1 wt% mica flakes coated with titanium dioxide and 0.01 wt% carbon black.

[0125] Brightness (L * ) and brightness change as a function of viewing angle (ΔL * ) are given in Fig. 9(a) and (b) respectively. From these curves, it can be seen that the samples containing TiO-enhanced mica give brightness (L * ) and brightness change as a function of viewing angle (ΔL * ), which is closer to silver paint than unreinforced aluminum flakes. This again demonstrates that the retention of the aspect ratio and the resulting orientation of the flakes in the interlayer facilitates ...

Embodiment 4

[0128] In this example, an intermediate layer containing 1 wt% of mica flakes coated with titanium dioxide was placed over the first layer, which also contained mica flakes coated with titanium dioxide. Both layers contained a small amount of about 0.001 wt% carbon black, where wt% is based on the total weight of the layer. Since the titanium dioxide-coated flakes in the interlayer allow a substantial amount of incident light to pass through the interlayer, it is generally desirable to minimize the amount of transmitted light and maximize the amount of reflected light. One possible way to achieve this is to apply a first layer that promotes an increase in the amount of reflected light based on the incident light on the film. To facilitate increased reflection of incident light, the first layer contains titanium dioxide-coated mica flakes and carbon black. Brightness (L * ) and brightness change as a function of viewing angle (ΔL * ) are given in Fig. 11(a) and (b) respectiv...

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Abstract

A silver multilayered film comprises at least one intermediate layer comprising a polymeric resin; a colorant composition and a flake composition, wherein the normal to the individual flakes are oriented at an average angle of about 0 to about 75 degrees with a normal to the multilayered film, and wherein the intermediate layer is located between a first layer and an second layer and further wherein the multilayered film has a lightness greater than or equal to about 60 and a change in lightness as a function of viewing angle of greater than or equal to about 40. A multilayered film comprises an intermediate layer disposed on and in intimate contact with a surface of a first layer and a second layer disposed on and intimate contact with a surface of the intermediate layer opposite the first layer, wherein the intermediate layer comprises a polymeric resin; a colorant composition and a flake composition, wherein the normal to the individual flakes are oriented at an average angle of about 0 to about 75 degrees with a normal to the multilayered film, and further wherein the multilayered film has a lightness greater than or equal to about 60 and a change of lightness as a function of viewing angle of greater than or equal to about 40.

Description

Background of the invention [0001] The present disclosure relates to methods of making silver multilayer films and articles derived therefrom. [0002] A decorative and aesthetic finish to manufactured products such as automobiles, refrigerators, computers, electronics, etc. is usually provided by painting. The coating process for commercial application to achieve this surface decoration is spray coating, electrostatic spray coating, dip coating and the like. However, the development of finishes for surface decoration is generally considered expensive due to the high investment costs for plant installation and maintenance and the high associated paint production costs. In addition, the application of coatings to different manufactured products also brings environmental problems, such as the release of volatile organic compounds into the air. Therefore, it is generally desirable to provide a surface finish to a finished product that is both inexpensive and minimizes the envir...

Claims

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Application Information

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IPC IPC(8): B32B27/18C08K3/00B32B19/02B32B27/06B32B27/20B32B27/36B60R13/00
CPCB60R13/00B44F1/00Y10T428/31507B32B27/20Y10T428/251Y10T428/25B32B27/36Y10T428/256Y10T428/31786B32B27/08B32B27/365B32B37/10B32B2264/10B32B2307/406B32B2250/244B32B2250/03
Inventor 周宏毅王华约翰·F·格拉夫
Owner SABIC INNOVATIVE PLASTICS IP BV
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