Method of producing a polymer part and polymer part
A method of producing a polymer part comprising the following steps: (a) incorporating a hydrophobic small molecule into the polymer before, during or after manufacture of the polymer part, the hydrophobic small molecule and the polymer being essentially inert to one another; and (b) annealing the polymer part to induce migration of the hydrophobic small molecules to a surface of the polymer part to provide that surface with a specified degree of hydrophobicity defined by the combination of the polymer and the hydrophobic small molecule; is described. Polymer parts made according to the method are also described.
1. A method of producing polymer slides comprising the following steps:
(a) incorporating hydrophobic small molecules into polymer parts of a plurality of polymer slides before during or after manufacture of said polymer parts, each polymer part having a surface, said surface having a first surface portion and a second surface portion, the hydrophobic small molecules and the polymer being essentially inert to one another, wherein the molecular weight of the small molecules is between 100 and 500; and
(b) arranging the plurality of polymer slides so that adjacent polymer slides are arranged in a manner that the first surface portion of one slide faces a second surface portion of another slide; and
(c) annealing the polymer parts at 50 to 150° C. to induce migration of the hydrophobic small molecules to the surface of the polymer parts for obtaining surface portions having respective first and second specified degrees of hydrophobicity which are different from each other, wherein
said annealing exerts vapor pressure of the hydrophobic small molecule at the annealing temperature so that the hydrophobic small molecules evaporate from said first surface portion of the polymer part of one polymer slide onto the adjacent second surface portion of the polymer part of another polymer slide to provide the surface of an adjacent polymer part with a specified degree of hydrophobicity by vaporisation onto said second surface portion of the adjacent polymer part defined by the combination of the polymer and the hydrophobic small molecules.
2. A method according to claim 1 , wherein the specified degree of hydrophobicity is further defined by a coating layer on said surface.
3. A method according to claim 2 , wherein said surface has a first surface portion and a second surface portion which differ in their surface coating.
4. A method according to claim 1 , wherein the polymer is an organic polymer.
5. A method according to claim 4 , wherein the organic polymer is a polyolefin.
6. A method according to claim 5 , wherein the polyolefin is polypropylene, a cycloolefin homopolymer or a cycloolefin copolymer.
7. A method according to claim 2 , wherein the hydrophobic small molecule has a functional group capable of forming a chemical bond to a metal atom.
8. A method according to claim 1 , wherein the small molecule is incorporated into polymer raw material used to form the polymer part.
9. A method according to claim 1 , additionally including the following step subsequent to step (a) but prior to step (b):
(a1) coating said second surface portion of the polymer parts of the polymer slides with a metal or a metallic compound.
10. A method according to claim 9 , additionally comprising the step subsequent to step (a1) but prior to step (b):
(a2) oxidising the metal or metallic compound on said surface.
11. A method according to claim 1 , additionally including the step of coating said surface of the polymer part with an insulator.
12. A method according to claim 9 , additionally comprising the step subsequent to step (a1) but prior to step (b):
(a2) performing a plasma treatment of said surface of the polymer part.
13. A method according to claim 1 , further comprising: re-annealing the polymer part at a subsequent time to return the surface to the specified degree of hydrophobicity.