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Method of making retrochromic beads and kit thereof

一种逆反射、色珠的技术，应用在光学元件、仪器、光学等方向，能够解决困难、涂层厚度不一、逆反射色性不规则等问题，达到制备简便的效果

Inactive Publication Date: 2005-08-10
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This article tends to lose its retroreflective color, or to have irregular retroreflective color, due to the varying thickness of the coating on the layer and the varying depth of embedding of the beads in the layer
They are more susceptible to damage if the product is bent during use, or if the product is used as a heat shrink damage indicator film
In addition, to make such retroreflective products with complex patterns and multiple retroreflective colors, the preparation process will be very laborious and difficult.

Method used

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  • Method of making retrochromic beads and kit thereof
  • Method of making retrochromic beads and kit thereof
  • Method of making retrochromic beads and kit thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 192

[0125] The intrinsic retroreflective color bead set is prepared as follows. The various intrinsic retroreflective color beads (about 1 g each) prepared in Examples 37-49 were respectively dispensed into 2 mL (0.5 dram) glass vials with caps (under the trade name "CLASSA CLEAR GLASS THERADED VIALS WITH RUBBER-LINDER CLOSURES" were purchased from Fisher Scientific, Pittsburgh, PA). These vials were placed into slots in cardboard containers (commercially available from Fisher Scientific under the trade designation "WHEATON LAB FILE STORAGE SYSTEM").

Embodiment 193

[0127]The intrinsic retroreflective color bead set is prepared as follows. The various intrinsic retroreflective color beads (about 1 g each) prepared in Examples 37-49 were respectively dispensed into 2 mL (0.5 dram) glass vials with caps (under the trade name "CLASSA CLEAR GLASS THERADED VIALS WITH RUBBER-LINDER CLOSURES" were purchased from Fisher Scientific, Pittsburgh, PA). These vials were affixed to a piece of cardboard (available under the trade designation "REGULAR MAT BOARD CR-SRM 989 RAVEN BLACK" from Crescent Cardboard Co. )superior.

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PUM

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Abstract

The present invention provides a method of making a plurality of intrinsically retrochromic beads. The present invention further provides a kit comprising intrinsically retrochromic beads having different retroreflective colors.

Description

field of invention [0001] The present invention relates generally to retroreflective beads which change the color of retroreflected light. The invention also relates to methods of making such retroreflective beads and articles comprising retroreflective beads. Background of the invention [0002] "Retroreflectivity" refers to the ability to receive a beam of light and reflect it back substantially in the direction of the source. Films, such as transparent laminated films backed by adhesives and containing covert retroreflective patterns, have been used to authenticate security articles (eg, passports, identification badges, etc.). Generally, such laminated films have some covert retroreflective patterns that are not easily visible under diffuse lighting conditions, but are easily visible in retroreflected light mode (such as with special devices such as flashlights or retroreflective viewers). ). [0003] Depending on the application, adding covert color to retroreflectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/126G02B5/128
CPCG02B5/128
Inventor K·D·布德M·H·弗雷
Owner 3M INNOVATIVE PROPERTIES CO
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