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Article with microstructured layer

A micro-structuring and micro-structuring technology, applied in the direction of layered products, synthetic resin layered products, lamination, etc., can solve problems such as expensive and affecting optical properties

Active Publication Date: 2020-10-23
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can be an expensive, time and / or labor intensive manufacturing step, and even slight misalignment can adversely affect optical performance

Method used

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  • Article with microstructured layer
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] A crosslinkable resin composition was prepared according to Example 2 of US Patent 8,282,863 B2 (Jones et al.), the disclosure of which is incorporated herein by reference. A bead of crosslinkable composition is placed on the processing surface. A conventional 0.050 mm (50 micron) thick biaxially oriented polyester film was laminated to the crosslinkable resin using a hand roller. The construction was then exposed at a rate of 15.2 meters per minute (m / min) to UV light from a UV curing system (available under the trade designation "FUSION UV CURING SYSTEM" from Gaithersburg, Maryland) with a D bulb operating at 3600 watts. under ultraviolet light from Fusion UV Systems, Inc., Gaithersburg, MD). The processing surface was removed leaving the first microstructured layer on the polyester film surface. A bead of crosslinkable composition was placed on the working surface and spread out with a wire wound rod (obtained from R.D. Specialties under the trade designation "#5 W...

Embodiment 2

[0128] Crosslinkable resin compositions were prepared by mixing the components in Table 1 (below) in the indicated weight ratios.

[0129] Table 1

[0130]

[0131]

[0132] A bead of crosslinkable composition is placed on the processing surface. A conventional 0.050 mm (50 micron) thick biaxially oriented polyester film was laminated to the crosslinkable resin using a hand roller. The construct was then exposed to UV light from a source operating at 100% power (under the trade name "FIREPOWER FP501 under UV light from Phoseon Technology Inc. Hillboro, OR). The polyester film was removed leaving the second microstructured layer on the processing surface. A microstructured surface of an extender film (obtained under the trade designation "THIN BRIGHTNESS ENHANCEMENT FILM TBEF3(24)N" from 3M Company) was laminated to the second microstructured layer. The sample was then exposed to light from a UV curing system ("FUSION UV CURING SYSTEM") with a D bulb operating at 36...

Embodiment 3

[0136]A bead of crosslinkable resin composition A was placed on the working surface and spread out with a wire wound rod (obtained from R.D. Specialties under the trade designation "#6 WIREWOUND ROD"). The construction was then exposed to UV light from a UV curing system ("FUSION UV CURING SYSTEM") with a D bulb operating at 3600 watts at a speed of 15.2 m / min. Attach the partially cured composition and a piece of incremental film ("THIN BRIGHTNESS ENHANCEMENT FILM TBEF3(24)N") at one edge with adhesive tape ("SCOTCH MAGIC TAPE, CAT.810"), but do not touch both Surface of the microstructured layer. The prisms of the two microstructured layers were generally oriented orthogonal to each other. The construct was placed in a reclosable bag ("RELOC ZIPPIT") and the bag was purged with nitrogen for 3 minutes. While still in the reclosable pouch, the microstructured surface of the bulking film was laminated to the non-microstructured surface of the second microstructured layer. Th...

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Abstract

An article is disclosed that includes a first microstructured layer comprising a first material and having a first major surface and an opposing second major surface, the first major surface is a microstructured surface, and the microstructured surface has peaks and valleys, wherein the peaks are microstructure features, each of which has a distance between the peak and the adjacent valley of the corresponding microstructure feature a defined height; and a second layer comprising at least one of a crosslinkable composition or a crosslinked composition, wherein at least a portion of the second major surface of the second layer is directly attached to the first microstructure at least a portion of the first major surface of the layer. The articles described herein are useful, for example, in optical film applications. E.g. Articles comprising regular prism microstructured patterns can serve as total internal reflection films for use as brightness enhancing films; articles comprising corner cube microstructured patterns can serve as reflective films for use when combined with back reflectors and the article comprising the prismatic microstructured pattern can serve as an optical turning film or element for use in an optical display.

Description

Background technique [0001] Microstructured films can be used in optical displays. For example, a prismatic microstructured film can function as a brightness enhancing film. Two or more microstructured films can be used together in many kinds of optical displays. Additionally, one or more other optical films may be used in an optical display in conjunction with one or more microstructured films. These microstructured films and other optical films are typically manufactured separately and incorporated into optical displays when they are manufactured, or into subassemblies or components when manufacturing subassemblies or components intended for incorporation into optical displays. in the component. This can be an expensive, time and / or labor intensive manufacturing step. Some of these microstructured films and other optical films are designed to include layers for the purpose of providing stiffness or other handling advantages during film fabrication, film switching, film d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/30G02B5/02
CPCG02B5/0231G02B5/0278G02B6/0053G02B6/0065B32B7/12B32B7/14B32B27/08B32B27/18B32B27/285B32B27/308B32B27/32B32B27/325B32B27/36B32B27/365B32B27/38B32B27/40B32B2250/24B32B2307/40B32B2307/416B32B2307/42B32B2307/732B32B2457/20B32B2457/202B32B2551/00B32B7/05B32B3/30G02F1/133607G02B5/0284B32B37/144B32B2305/72B32B2307/418B32B2307/518
Inventor 杰佛瑞·L·所罗门迈克尔·本顿·弗里史蒂文·J·麦克曼马丁·B·沃克伊莉萨·M·克罗斯
Owner 3M INNOVATIVE PROPERTIES CO