Polymeric multilayer films and methods to make the same
US-2017001359-A1 · Jan 5, 2017 · US
Method of making polymeric multilayer films
US2016023393A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016023393-A1 |
| Application number | US-201414772878-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 4, 2014 |
| Priority date | Mar 12, 2013 |
| Publication date | Jan 28, 2016 |
| Grant date | — |
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- Title
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Abstract
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Method of making at least two distinct, separate polymeric films. Embodiments of polymeric multilayer film described herein are useful, for example, for filtration or acoustic absorption.
First claim
Opening claim text (preview).
1 . A method of making at least two distinct, separate polymeric films, the method comprising: extruding at least two polymeric layers into a nip to provide a polymeric multilayer film, wherein the nip comprises a first roll having a structured surface that imparts indentations through a first major planar surface of the polymeric multilayer film; and passing the first major planar surface having the indentations over a chill roll while applying a heat source to a generally opposed second major surface of the polymeric multilayer film, wherein the application of heat from the heat source results in formation of an array of openings extending between the first and second major surfaces of the polymeric multilayer film; and separating at least the first and second layers of the polymeric multilayer film having the array of openings to provide at least two distinct, separate polymeric films. 2 . The method of claim 1 , wherein the first layer has a thickness not greater than 125 micrometers. 3 . The method of claim 1 , wherein the second layer has a thickness not greater than 125 micrometers. 4 . The method of claim 1 having at least 30 openings/cm 2 .
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Classifications
Making multilayered or multicoloured articles {(B29C43/26 takes precedence)} · CPC title
specially adapted for bringing together components, e.g. melts within the die · CPC title
- B29C48/002Primary
combined with surface shaping · CPC title
Flat, e.g. panels · CPC title
Conveyors for extruded articles · CPC title
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Frequently asked questions
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- What does patent US2016023393A1 cover?
- Method of making at least two distinct, separate polymeric films. Embodiments of polymeric multilayer film described herein are useful, for example, for filtration or acoustic absorption.
- Who is the assignee on this patent?
- 3M Innovative Properties Co
- What technology area does this patent fall under?
- Primary CPC classification B29C48/002. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jan 28 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).