Mold, Method for the Production and Use Thereof, Plastic Film and Plastic Component

Abstract

The invention relates to a method for creating a surface structure on a mold, wherein first structural elements are created using a laser structuring process in a first step, and second structural elements, which are smaller than the first structural elements, are created using an anodic oxidation process in another step following the laser structuring process. The invention further relates to a mold of said type and finally to a plastic film or a plastic component having a surface structure as well as to a method for the production thereof.

1 - 24 . (canceled) 
     
     
         25 . A method for producing a surface structure on a molding tool comprising:
 producing first structural elements by laser structuring; and   producing second structural elements by anodic oxidation, the second structural elements being smaller than the first structural elements.   
     
     
         26 . The method of  claim 25 , wherein said step of producing first structural elements comprises producing first structural elements having a lateral extension of about 0.5 μm to about 500 μm. 
     
     
         27 . The method of  claim 25 , wherein said step of producing first structural elements comprises producing first structural elements having a height of about 0.5 μm to about 200 μm. 
     
     
         28 . The method of  claim 25 , wherein said steps of producing first structural elements and producing second structural elements are performed on a molding tool that contains, or consists of, a metal or a metal alloy. 
     
     
         29 . The method of  claim 25 , wherein said steps of producing first structural elements and producing second structural elements are performed on a molding tool comprising aluminum or titanium. 
     
     
         30 . The method of  claim 25 , wherein said step of producing second structural elements comprises carrying out the anodic oxidation in a multi-stage method to produce the second structural elements, said multi-stage method including the following steps:
 a first anodic oxidation   at least a partial removal of an oxide layer by wet chemical etching   at least one second anodic oxidation   optionally opening of the pores formed in the preceding steps.   
     
     
         31 . The method of  claim 25 , comprising the step of:
 electropolishing the surface of the molding tool after carrying out the laser structuring and before producing the second structural elements.   
     
     
         32 . The method of  claim 25 , comprising the step of:
 tempering the molding tool at a temperature of about 800° C. to about 1300° C.   
     
     
         33 . The method of  claim 32 , wherein said step of tempering the molding tool comprises tempering the molding tool in a protective gas atmosphere. 
     
     
         34 . The method of  claim 25 , wherein the molding tool comprises aluminum and said step of producing said second structural elements by anodic oxidation results in formation of γ-aluminum oxide on the surface of the molding tool and said method comprises:
 at least partially converting the γ-aluminum oxide into α-aluminum oxide on the surface of the molding tool. 
 
     
     
         35 . The method of  claim 25 , comprising the step of:
 depositing a non-stick coating comprising a plasma polymer by means of PE-CVD which has a thickness of about 5 nm to about 30 nm.   
     
     
         36 . A molding tool with a surface structure including:
 first structural elements having a lateral extension of about 0.5 μm to about 500 μm; and   second structural elements having a lateral extension smaller by a factor of at least 10 than the lateral extension of the first structural elements,   wherein at least part of the surface of the molding tool is covered with aluminum oxide.   
     
     
         37 . The molding tool of  claim 36 , wherein the second structural elements are applied onto an entire surface of the first structural elements. 
     
     
         38 . The molding tool of  claim 36 , wherein the molding tool comprises a metal or an alloy selected from a group consisting of aluminum or titanium. 
     
     
         39 . The molding tool of  claim 36 , wherein at least part of the surface of the molding tool contains a non-stick coating comprising a plasma polymer having a thickness of about 5 nm to about 30 nm.