Fluid transfer component for transferring thermal energy comprising a film with fluid channels

1. A fluid transfer component for transferring thermal energy, the fluid transfer component comprising:

a film comprising a polymer and having a thickness in a thickness direction of the film less than 5 millimeters;

an input side of the film constructed to receive a fluid that flows in a flow direction from the input side to an active region of the film exposed to an environment; and

more than 20 fluid channels defined by interior surfaces within the film, each fluid channel of the more than 20 fluid channels is separated spatially in at least 1 row in a thickness direction of the film, the more than 20 fluid channels have a channel density across the active region greater than 5 fluid channels per centimeter,

wherein the thermal energy is transferred to or from the environment and the fluid in the active region of the film.

2. The fluid transfer component of claim 1 wherein the channel density across the active region is greater than 10 fluid channels per centimeter.

3. The fluid transfer component of claim 1 wherein the film is an extruded microcapillary film wherein the more than 20 fluid channels are formed during a film extrusion process.

4. The fluid transfer component of claim 1 wherein the interior surfaces that define the more than 20 fluid channels comprise a surface modified to produce a surface relief profile.

5. The fluid transfer component of claim 1 wherein the film comprises openings in the thickness direction that fluidly connect the more than 20 fluid channels to the environment.

6. The fluid transfer component of claim 5 wherein the fluid comprises air at a temperature warmer than the environment such that the air exiting the film through the openings warms the environment.

7. A warming blanket comprising the fluid transfer component of claim 6 wherein the environment comprises skin of an individual.

8. An article of clothing comprising the fluid transfer component of claim 6 wherein the environment comprises skin of an individual.

9. The fluid transfer component of claim 5 wherein the fluid comprises air at a temperature cooler than the environment such that the air exiting the film through the openings cools the environment.

10. A cooling blanket comprising the fluid transfer component of claim 9 wherein the environment comprises skin of an individual.

11. An article of clothing comprising the fluid transfer component of claim 9 wherein the environment comprises skin of an individual.

12. A fluid transfer component for transferring thermal energy, the fluid transfer component comprising:

a film comprising a polymer and having a thickness in a thickness direction of the film less than 5 millimeters;

more than 20 fluid channels defined by interior surfaces within the film, each fluid channel of the more than 20 fluid channels is separated spatially in at least 1 row in a thickness direction of the film; and

an input side and an output side where a fluid flows in a flow direction from the input side to the output side in an active region of the film exposed to an environment,

wherein the more than 20 fluid channels have a channel density across the active region greater than 5 fluid channels per centimeter and the thermal energy is transferred to or from the environment and the fluid in the active region of the film.

13. The fluid transfer component of claim 12 wherein the active region has an ASTM D1003-00 haze less than 10%.

14. The fluid transfer component of claim 12 wherein the fluid comprises a liquid at a temperature warmer than the environment such that heat is transferred to the environment in the active region and warms the environment.

15. A warming blanket comprising the fluid transfer component of claim 14 wherein the environment comprises skin of an individual.

16. An article of clothing comprising the fluid transfer component of claim 14 wherein the environment comprises skin of an individual.

17. The fluid transfer component of claim 12 wherein the fluid comprises a liquid at a temperature cooler than the environment such that the fluid transfer component receives heat from the environment in the active region and transfers the heat through flow of the fluid.

18. A cooling blanket comprising the fluid transfer component of claim 17 wherein the environment comprises skin of an individual.

19. An article of clothing comprising the fluid transfer component of claim 17 wherein the environment comprises skin of an individual.

20. A method of warming an individual, the method comprising:

forming a fluid transfer component comprising a film comprising a polymer and having a thickness in a thickness direction of the film less than 5 millimeters, an input side of the film constructed to receive a fluid that flows in a flow direction from the input side to an active region of the film exposed to an environment comprising the individual, more than fluid channels defined by interior surfaces within the film, each fluid channel of the more than 20 fluid channels is separated spatially in at least 1 row in a thickness direction of the film in the active region, the more than 20 fluid channels have a channel density across the active region greater than 5 fluid channels per centimeter;

positioning the active region of the film proximate a skin of the individual; and

flowing the fluid through the more than 20 fluid channels such that thermal energy is transferred to the individual from the active region of the film.