Methods of forming molds and methods of forming articles using said molds
US-9102083-B2 · Aug 11, 2015 · US
Article with microstructured layer
US11407196B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11407196-B2 |
| Application number | US-201616066943-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 22, 2016 |
| Priority date | Dec 28, 2015 |
| Publication date | Aug 9, 2022 |
| Grant date | Aug 9, 2022 |
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Abstract
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Article comprising a first, microstructured layer comprising a first material, and having first and second opposed major surfaces, the first major surface being a microstructured surface, and the microstructured surface having peaks and valleys, wherein the peaks are microstructural features each having a height defined by the distance between the peak of the respective microstructural feature and an adjacent valley; and a second layer comprising at least one of a crosslinkable or crosslinked composition, wherein at least a portion of the second major surface of the second layer is directly attached to at least a portion of the first major surface of the first, microstructured layer. Articles described herein are useful, for example, for optical film applications. For example. An article including a regular prismatic microstructured pattern can act as a totally internal reflecting film for use as a brightness enchancement film; an article including a corner-cube prismatic microstructured pattern can act as a retroreflecting film or element for use as reflecting film when combined with a back reflector; and an article including a prismatic microstructured pattern can act as an optical turning film or element for use in an optical display.
First claim
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What is claimed is: 1. An article comprising: a first, microstructured layer comprising a first material, and having first and second opposed major surfaces, the first major surface being a microstructured surface, and the microstructured surface having peaks and valleys, wherein the peaks are microstructural features each having a height defined by the distance between the peak of the respective microstructural feature and an adjacent valley; and a second microstructured layer comprising a second material comprising at least one of a crosslinkable or crosslinked composition, the second material being at least partially uncured, and having first and second opposed major surfaces, the first major surface being a microstructured surface, and the microstructured surface having peaks and valleys, wherein the peaks are microstructural features each having a height defined by the distance between the peak of the respective microstructural feature and an adjacent valley, wherein at least a portion of the second major surface of the second microstructured layer is directly and permanently attached to at least a portion of the first major surface of the first, microstructured layer, and wherein a portion of each of the microstructural features of the first, microstructured layer at least partially penetrates into the at least partially uncured second material of the second layer. 2. The article of claim 1 , wherein the first material of the first, microstructured layer comprises at least one of a crosslinkable or crosslinked composition. 3. The article of claim 1 , wherein the first, microstructured layer comprises the crosslinkable composition. 4. The article of claim 1 , wherein the first, microstructured layer comprises the crosslinked composition. 5. The article of claim 1 , wherein the second layer comprises the crosslinkable composition. 6. The article of claim 1 , wherein the second layer comprises the crosslinked composition. 7. The article of claim 1 , wherein the first, microstructured layer has a thickness defined by the smallest distance from any valley to the second major surface of the first, microstructured layer, and wherein the thickness is not greater than 25 micrometers. 8. The article of claim 1 , wherein the second microstructured layer has a thickness defined by the smallest distance from any valley to the second major surface of the first, microstructured layer, wherein the thickness is not greater than 25 micrometers. 9. The article of claim 1 , wherein the article has a thickness not greater than 80 micrometers.
Assignees
Inventors
Classifications
the surface having microprismatic or micropyramidal shape (macroscopic prism arrays G02B5/045) · CPC title
All layers being polymeric · CPC title
comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title
Optical elements · CPC title
comprising polycycloolefins · CPC title
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- What does patent US11407196B2 cover?
- Article comprising a first, microstructured layer comprising a first material, and having first and second opposed major surfaces, the first major surface being a microstructured surface, and the microstructured surface having peaks and valleys, wherein the peaks are microstructural features each having a height defined by the distance between the peak of the respective microstructural feature …
- Who is the assignee on this patent?
- 3M Innovative Properties Co
- What technology area does this patent fall under?
- Primary CPC classification B32B3/30. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 09 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).