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Reflective Articles Comprising A Micro-Cellular Structure And Having Improved Reflectivity

A technology of reflectivity and pore structure, which can be applied to home appliances, other home appliances, applications, etc., and can solve the problem that purple pump LEDs do not show optical properties, etc.

Inactive Publication Date: 2017-12-01
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] There is a long felt need in the art for improved reflective materials as existing reflectors do not exhibit optimal optical properties for violet pumped LEDs

Method used

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  • Reflective Articles Comprising A Micro-Cellular Structure And Having Improved Reflectivity
  • Reflective Articles Comprising A Micro-Cellular Structure And Having Improved Reflectivity
  • Reflective Articles Comprising A Micro-Cellular Structure And Having Improved Reflectivity

Examples

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Embodiment approach

[0090] As explained herein, the foam cell structure exhibits improved reflectivity at specific wavelengths such as the 315-420 nm range; the reflectance in the 380-420 nm range is of particular interest. Without being bound by any particular theory, generally the smaller the pore size, the higher the reflectivity.

[0091] Exemplary foam / microcellular structures can be obtained by forming cells equipped with pore forming technology (e.g. MuCell TM Technology) and injection molding machine with heating and cooling capabilities to obtain PC by injection molding. For the examples given herein, nitrogen was used as the "bubbling" gas, although other gases are known to those skilled in the art.

[0092] For these exemplary materials, the MuCell unit injected nitrogen gas under high pressure (350 bar) into molten polycarbonate (PC) (with a weight average molecular weight of about 70 kilodaltons, based on polystyrene), which was injected into the heated mold. Gas backpressure can ...

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Abstract

Provided are microcellular plastic articles having improved reflective properties. Also provided are methods of utilizing the disclosed articles.

Description

[0001] related application [0002] This application claims priority and benefit to U.S. Application 62 / 135,913, "Methods for Improving Reflectance Using Articles Including Microporous Structures," filed March 20, 2015, which is incorporated by reference in its entirety for any and all purposes. into this article. technical field [0003] This disclosure relates to the field of reflective polymeric materials. Background technique [0004] Due to their performance and efficiency, violet (including violet-pumped) LEDs are replacing incandescent and halogen light sources. [0005] Existing reflectors (for commercial and residential lighting) are made of polycarbonate or polyester highly loaded with titanium dioxide or other brighteners. But the materials in existing reflectors have wavelengths below 430nm and therefore typically absorb significantly in the violet and ultraviolet parts of the spectrum. Due to this absorption, using these reflectors with LEDs may in some cases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08
CPCG02B5/0891B29D11/00605B29L2011/0083B29K2995/003B29K2033/04B29K2067/003B29K2067/006B29K2069/00B29K2075/00B29C44/42B29K2101/10B29K2101/12B29K2105/041B29D11/00596
Inventor F·P·M·莫希M·J·阿斯拉姆
Owner SABIC GLOBAL TECH BV
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