Three-dimensional article and method of making the same

Patent metadata

Field	Value
Publication number	US-10399255-B2
Application number	US-201616060823-A
Country	US
Kind code	B2
Filing date	Dec 20, 2016
Priority date	Dec 28, 2015
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

Three-dimensional polymeric article ( 100 ) having first ( 101 ) and second ( 102 ) opposed major surfaces, a base body ( 103 ) having a first dimension, a second dimension perpendicular to the first dimension, and a thickness, wherein the thickness is orthogonal to the first and second dimensions, wherein the base body ( 103 ) comprises a plurality of alternating, adjacent first ( 107 ) and second ( 108 ) polymeric regions along the first dimension, wherein the second dimensions of the first ( 107 ) and second ( 108 ) regions extend at least partially across the second dimensions, wherein the first regions ( 107 ) have a first crosslink density, wherein the second regions ( 108 ) have a second crosslink density, wherein the second crosslink density of the second regions ( 108 ) are less than the first crosslink density of the first regions ( 107 ), wherein the first and second regions extend perpendicularly in two directions from a central plane ( 115 ) in the base body ( 103 ) parallel to the first and second dimensions of the polymeric article ( 100 ), and wherein the second regions ( 108 ) extend in each of said two directions further than does the first regions ( 107 ). Embodiments of the three-dimensional polymeric article described herein are useful for providing a dual sided, textured wrapping film such that greater grip is realized both on an item wrapped by the film and the wrapped item itself.

First claim

What is claimed is:

1. A three-dimensional polymeric article having first and second opposed major surfaces, a base body having a first dimension, a second dimension perpendicular to the first dimension, and a thickness, wherein the thickness is orthogonal to the first and second dimensions, wherein the base body comprises a plurality of alternating, adjacent first and second polymeric regions along the first dimension, wherein the second dimensions of the first and second regions extend at least partially across the second dimensions, wherein the first regions have a first crosslink density, wherein the second regions have a second crosslink density, wherein the second crosslink density of the second regions are less than the first crosslink density of the first regions, wherein the first and second regions extend perpendicularly in two directions from a central plane in the base body parallel to the first and second dimensions of the polymeric article, and wherein the second regions extend in each of said two directions further than does the first regions.

2. The three-dimensional polymeric article of claim 1 , wherein the second crosslink density of the second regions are less than 1 percent the first crosslink density of the first regions.

3. The three-dimensional polymeric article of claim 1 having in the range from 0.5% to 99.5% of the first major surface comprising the first regions.

4. The three-dimensional polymeric article of claim 1 , wherein the first and second regions comprise a filler material.

5. The three-dimensional polymeric article of claim 1 , wherein the first and second regions each have an average thickness, and wherein the average thickness of the second regions is at least 1 micrometer greater than the average thickness of the first regions.

6. A method of making the three-dimensional polymeric article of claim 1 , the method comprising:
providing an oriented, crosslinkable film having first and second opposed major surfaces,
irradiating through at least a portion of the first major surface of the oriented, crosslinkable film to cause at least some portions under the first major surface to be irradiated and at least partially crosslink to provide first irradiated portions, wherein there remain after said irradiating at least second portions that are less irradiated than the first irradiated portions and, wherein the first irradiated portions have a lower shrink ratio than the second irradiated portions; and
dimensionally relaxing the irradiated film.

7. The method of claim 6 , wherein irradiating is conducted via at least one of e-beam, UV, x-ray, or gamma radiation.

8. The method of claim 6 , wherein portions of the first major surface are masked to at least reduce exposure of the radiation to the first major surface.

Assignees

• 3M Innovative Properties Co

Inventors

• Hajime Evan Koon Lun Yuuji
• Clapper Jason D
• Halverson Kurt J
• Kang Myungchan

Classifications

• B29C59/18

  by liberation of internal stresses, e.g. plastic memory · CPC title

• B29C59/16

  by wave energy or particle radiation {, e.g. infrared heating (B29C59/007 takes precedence)} · CPC title

• B29C2035/0877

  using electron radiation, e.g. beta-rays · CPC title

• B29C2035/0827

  using UV radiation · CPC title

• B29C2035/085

  using gamma-ray · CPC title