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Retroreflective sheeting including a low-elastic modulus layer

A technology of elastic modulus and retroreflective products, which can be applied to reflective reflectors, instruments, and other household appliances, etc., and can solve the problems of low elastic modulus body layers not working

Active Publication Date: 2016-04-06
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using a low elastic modulus bulk layer in the cast and cure manufacturing process will not work

Method used

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  • Retroreflective sheeting including a low-elastic modulus layer
  • Retroreflective sheeting including a low-elastic modulus layer
  • Retroreflective sheeting including a low-elastic modulus layer

Examples

Experimental program
Comparison scheme
Effect test

example

[0059] Material

[0060] The following materials were used in the preparation of Comparative Examples A-B and Examples 1-4.

[0061]

[0062]

[0063] Test Methods

[0064] Coefficient of Retroreflection (Brightness) (R A ) : Generally through the method described in ASTME810-03, "Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheet Utilizing the Coplanar Geometry (Using the Standard Test Method for Coplanar Geometry of Retroreflective Sheet Retroreflective Coefficient)", using a retroreflectometer (Retrosign GR3, available from DELTA Danish Electronics Company ( DELTAD Danish Electronics (commercially available) to measure brightness. Take cd / lux.m 2 Report results for units.

[0065] Thickness and Modulus of Elasticity : Layer thickness and elastic modulus measurements of cross-sections of retroreflective sheeting were done using an atomic force microscope (AFM). The reflective sheets of Comparative Examples A-B and Examples 1-...

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Abstract

The present application generally relates to retroreflective articles and methods of making retroreflective articles. Some embodiments include a body layer having an elastic modulus of equal to or greater than 1750 MPa, a plurality of truncated cube corner elements, and a polymeric layer between the body layer and the cube corner elements, the polymeric layer having an elastic modulus of less than 1750 MPa.

Description

technical field [0001] This application relates generally to retroreflective articles and methods of making retroreflective articles. Background technique [0002] Retroreflective articles are characterized by the ability to redirect light incident on the material so that it reflects back to the original light source. This characteristic has led to the widespread use of retroreflective articles in sheet form, for example, in transportation and personal safety applications. Retroreflective sheeting is commonly used in a variety of traffic control articles (eg, road markings, barricades, license plates, pavement markings and pavement marking tapes, and reflective tapes for vehicles and clothing). [0003] Cube corner sheeting (sometimes called prisms, microprisms, corner prisms, or total internal reflection sheeting) is a type of retroreflective sheeting. Such retroreflective sheeting typically includes a plurality of cube corner elements for retroreflecting incident light. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/12G02B5/22G02B5/124
CPCG02B5/124G02B1/04B29C35/00B29K2033/08B29K2069/00B29K2027/06B29K2075/00B29L2011/0083
Inventor 雷马·查特吉杰弗里·A·彼得森克里斯托弗·P·格拉赫大卫·W·迈茨
Owner 3M INNOVATIVE PROPERTIES CO
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