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US 2012/0237746 A1Published application
Multi-Layer Polymeric Films and Methods of Forming Same
OwnerHugh Joseph O'Donnell, Daniel Charles Peck +1inventors
InventorsHugh Joseph O'Donnell, Daniel Charles Peck, Pier-Lorenzo Caruso
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Abstract
A multi-layer polymeric film having an “A” layer and a “B” layer. The “A” layer includes a first polymer and a first inclusion substantially disposed therein. The first inclusion is a first material that has a higher elastic modulus than the first polymer. The “B” layer includes a second polymer and a second inclusion substantially disposed therein. The second inclusion is a second material that has a higher elastic modulus than the second polymer. Methods of forming a multi-layer film are also provided.
Claims32
A multi-layer polymeric film comprising:
- a) an “A” layer comprising a first polymer having an elastic modulus and a first inclusion substantially disposed therein, wherein the first inclusion comprises a first material, the first material having a higher elastic modulus than the first polymer;
- and
- b) a “B” layer comprising a second polymer having an elastic modulus and a second inclusion substantially disposed therein, wherein the second inclusion comprises a second material, the second material having a higher elastic modulus than the second polymer,
- wherein the “A” layer and the “B” layer are adjacent and differ in at least one of the following:
- i) the first polymer and the second polymer are different;
- ii) the first material and the second material are different;
- and
- iii) the volume percent of the first inclusion in the “A” layer differs from the volume percent of the second inclusion in the “B” layer,
- wherein the A layer and B layer are joined together and combine to form a pair of A/B layers, and the multi-layer film comprises at least two pairs of A/B layers, wherein the A layer in one pair of A/B layers is in contact with the B layer in another pair of A/B layers.
6 more elements
A multi-layer polymeric film comprising:
- a) at least three layers of an “A” layer, each “A” layer comprising a first polymer having an elastic modulus and a first inclusion substantially disposed therein, wherein the first polymer comprises at least 50 volume percent of the “A” layer, wherein the first inclusion comprises a first material, the first material having an elastic modulus at least 50% higher than the first polymer, wherein the first material comprises at least 10 volume percent of the “A” layer;
- and
- b) at least three layers of a “B” layer, each “B” layer comprising a second polymer having an elastic modulus and a second inclusion substantially disposed therein, wherein the second polymer comprises greater than about 50 by volume percent of the “B” layer, wherein the second inclusion comprises a second material, the second material having an elastic modulus at least 50% higher than the second polymer, wherein the second material comprises at least 10 volume percent of the “B” layer,
- wherein each of the “A” layers and the “B” layers alternate, wherein each of the first material and the second material have void-initiating properties, and wherein each layer has a thickness no greater than about 5 micrometers.
1 more element
A method of forming a multi-layer polymeric film, the method comprising:
- a) preparing a first composition, the first composition comprising a first polymer having an elastic modulus and a first inclusion, the first inclusion being immiscible in the first polymer, the first inclusion comprising a first material, wherein the first material has a higher elastic modulus than the first polymer;
- b) preparing a second composition, the second composition comprising a second polymer having an elastic modulus and a second inclusion, the second inclusion being immiscible in the second polymer, the second inclusion comprising a second material, wherein the second material has a higher elastic modulus than the second polymer;
- and
- c) coextruding the first composition and the second composition into a plurality of alternating “A” and “B” layers, wherein the first composition forms the “A” layers and the second composition forms the “B” layers, each alternating layer has a thickness of less than about 2 micrometers, to form a multi-layer polymeric film, and wherein each alternating layer differs with respect to an adjacent layer in at least one of the following:
- i) the first polymer and the second polymer are different;
- ii) the first material and the second material are different;
- iii) the volume percent of the first inclusion differs from that of the second inclusion;
- iv) the first composition and the second composition are different;
- and
- v) the volume percent of first and second materials in their respective “A” and “B” layers are different.
7 more elements
Dependencies are inferred from the claim text.