Microcapillary films and foams suitable for capillary action fluid transport

Patent metadata

Field	Value
Publication number	US-9701798-B2
Application number	US-201214367550-A
Country	US
Kind code	B2
Filing date	Dec 21, 2012
Priority date	Dec 22, 2011
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

The instant invention provides microcapillary films and/or foams suitable for capillary action fluid transport. The inventive microcapillary film and/or foam containing suitable for capillary action fluid transport according to the present invention has a first end and a second end, and comprises: (a) a matrix comprising a thermoplastic material, and (b) at least one or more channels disposed in parallel in said matrix from the first end to the second end of said microcapillary film and/or foam, wherein said one or more channels are at least 1 μm apart from each other, wherein each said one or more channels have a diameter in the range of at least 1 μm; wherein said microcapillary film and/or foam has a thickness in the range of from 2 μm to 2000 μm.

First claim

We claim:

1. A microcapillary film or foam having a first end and a second end, wherein said film or foam comprises:
(a) a matrix comprising a thermoplastic material; and
(b) one or more channels disposed in parallel in said matrix from the first end to the second end of said film or foam, wherein said one or more channels are at least 1 μm apart from each other, wherein said one or more channels are surface treated, and wherein each said one or more channels have a diameter in the range of at least 1 μm;
wherein said film or foam has a thickness in the range of from 2 μm to 2000 μm.

2. The microcapillary film or foam of claim 1 , wherein said one or more channels have a cross-sectional shape selected from the group consisting of circular, rectangular, oval, star, diamond, triangular, square, and combinations thereof.

3. The microcapillary film or foam of claim 1 , wherein the microcapillary film or foam surface are surface treated.

4. The microcapillary film or foam of claim 1 , wherein said thermoplastic material is selected from the group consisting of polyolefin, polyamide; polyvinylidene chloride; polyvinylidene fluoride; polyurethane; polycarbonate; polystyrene; polyethylene vinylalcohol (PVOH), polyvinyl chloride, polylactic acid (PLA) and polyethylene terephthalate.

5. The microcapillary film or foam of claim 4 , wherein said polyolefin is polyethylene or polypropylene.

6. The microcapillary film or foam of claim 4 , wherein said polyamide is nylon 6.

7. A multilayer structure comprising the microcapillary film or foam of claim 1 .

8. A pipe or profile comprising the microcapillary film or foam of claim 1 .

9. An article comprising the microcapillary film or foam of claim 1 .

Assignees

• Dow Global Technololgies LLC
• Dow Global Technologies Llc

Inventors

• Zalamea Bustillo Luis G
• Koopmans Rudolf J
• Prieto Goubert Miguel A
• Wocke Colmar

Classifications

• B29C48/305

  having a wide opening, e.g. for forming sheets · CPC title

• Y10T428/1376

  Foam or porous material containing · CPC title

• C08J2323/02

  not modified by chemical after treatment · CPC title

• B29L2023/22

  Tubes or pipes, i.e. rigid (bent tubes not for use as pipe couplings B29L2023/004) · CPC title

• B29C48/11

  comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped · CPC title