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1. WO2020112740 - MODÈLES SOLUBLES ET LEURS PROCÉDÉS DE FABRICATION

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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CLAIMS

What is claimed is:

1. A template comprising:

a soluble polymer having disposed thereon a texture; where the texture comprises a pattern comprising a first plurality of spaced features; the spaced features arranged in a plurality of groupings; the spaced features within a grouping being spaced apart at an average distance of about 1 nanometer to about 500 micrometers; each feature having a surface that is substantially parallel to a surface on a neighboring feature; each feature being separated from its neighboring feature; and wherein the groupings of features being arranged with respect to one another so as to define a tortuous pathway; where the template in in the form of a free standing film that has a maximum thickness of 1.5 millimeters and a minimum thickness that is no greater than 40% percent of the maximum thickness; where the surface area of the textured surface is at least greater than 10 cm2.

2. The template of Claim 1, wherein the polymer is soluble in water.

3. The template of Claim 1, wherein the polymer has a dissolution rate of 0.5 to 10 grams per minute in an effective solvent.

4. The template of Claim 1, wherein the polymer is a linear thermoplastic amorphous polymer or a crosslinked polymer.

5. The template of Claim 1, wherein the polymer is selected from the group consisting of polyvinylalcohol, polyacrylamide, polyhexamethylcellulose,

polyhexaethylcellulose, polyethyleneimine, polyvinylpyrrolidone, polyamidoamine, polyethylene glycol, or a combination thereof.

6. The template of Claim 1, wherein the polymer is a copolymer of at least one of polyvinylalcohol, polyacrylamide, polyhexamethylcellulose, polyhexaethylcellulose, polyethyleneimine, polyethylene glycol, polyvinylpyrrolidone, or polyamidoamine.

7. The template of Claim 1, wherein the plurality of spaced features are projected into a surface of the template.

8. The template of Claim 1, wherein the groupings of features are arranged with respect to one another so as to define a linear pathway or a plurality of channels.

9. The template of Claim 1, wherein the tortuous pathway is defined by a sinusoidal curve or by a spline function.

10. The template of Claim 1, wherein the texture is disposed on opposing surfaces of the template.

11. The template of Claim 10, wherein the texture on the opposing surfaces of the template are inclined at an angle to one another.

12. A method comprising:

disposing a soluble polymer between two platens, where one of the platens has a texture;

contacting the soluble polymer with the platen having the texture at a temperature of 23 to 300°C and a pressure of 5 to 150 pounds per square inch;

forming a mirror image of the texture on the soluble polymer;

using the soluble polymer as a template to texture another surface; where the template is a free-standing film; where the texture comprises a pattern comprising a first plurality of spaced features; the spaced features arranged in a plurality of groupings; the spaced features within a grouping being spaced apart at an average distance of about 1 nanometer to about 500 micrometers; each feature having a surface that is substantially parallel to a surface on a neighboring feature; each feature being separated from its neighboring feature; and wherein the groupings of features being arranged with respect to one another so as to define a tortuous pathway; where the template in in the form of a free-standing film that has a maximum thickness of 1.5 millimeters and a minimum thickness that is no greater than 40 percent of the maximum thickness; where the surface area of the textured surface is at least greater than 10 cm2.

13. The method of Claim 12, further comprising texturing a surface of the soluble polymer that is opposed to the surface that is textured by the platen that has the texture.

14. The method of Claim 13, where the soluble polymer is molten prior to disposing it between the two platens.

15. The method of Claim 14, where the soluble polymer is mixed with a solvent prior to disposing it between the two platens.

16. The method of Claim 12, where the soluble polymer is heated after disposing it between the two platens.

17. The method of Claim 12, where the two platens are rollers.

18. The method of Claim 12, further comprising disposing the template between two non-stick sheets.