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Composition and method for making a cavitated bio-based film
US9267011B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9267011-B2 |
| Application number | US-201213425076-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 20, 2012 |
| Priority date | Mar 20, 2012 |
| Publication date | Feb 23, 2016 |
| Grant date | Feb 23, 2016 |
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- Title
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Abstract
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Composition and method for making a multi-layer bio-based film having one or more cavitated layers. In one aspect, the multilayer flexible film has polylactic acid, an inorganic filler, and a cavitation stabilizer making up at least one film layer. In one aspect, the barrier web has a cavitated bio-based film layer. In another aspect, the print web has a cavitated bio-based film layer.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for making a cavitated bio-based composite comprising the steps of: a) providing a molten sheet comprising inorganic filler, polylactic acid, and a bio-based cavitation stabilizer, wherein said bio-based cavitation stabilizer comprises between 5% and 20% by weight of the sheet and wherein said inorganic filler comprises between 12% and 25% by weight of the sheet; b) orienting said sheet between 2× and 3× in a machine direction; and c) orienting said sheet between 4× and 7× in a transverse direction, wherein said orienting steps produce a film having a density between about 16% and about 29% lower than a film substantially free of inorganic filler and cavitation stabilizer. 2. The method of claim 1 wherein said bio-based composite is co-extruded with a sealant layer. 3. The method of claim 1 wherein said bio-based composite is co-extruded with a primer layer. 4. The method of claim 1 wherein said inorganic filler comprises calcium carbonate. 5. The method of claim 1 wherein said cavitated bio-based composite is adhered to a PLA print web that is not cavitated.
Assignees
Inventors
Classifications
successively · CPC title
Heat sealable · CPC title
PLA, i.e. polylactic acid or polylactide · CPC title
the layers being joined at their surfaces · CPC title
comprising polyesters · CPC title
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Frequently asked questions
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- What does patent US9267011B2 cover?
- Composition and method for making a multi-layer bio-based film having one or more cavitated layers. In one aspect, the multilayer flexible film has polylactic acid, an inorganic filler, and a cavitation stabilizer making up at least one film layer. In one aspect, the barrier web has a cavitated bio-based film layer. In another aspect, the print web has a cavitated bio-based film layer.
- Who is the assignee on this patent?
- Cotton Robert Nolan, Laverdure Kenneth Scott, Palta Deepali, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C08K3/26. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 23 2016 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).