Method of producing self-cleaning and non-adhesive paper or paper-like material

A method to manufacture micro-structured paper or paper-like material that is water-repellant across the entire cross section of the material and having a self-cleaning and/or non-adhesive effect comprising:

• providing a paper or paper-like material comprising fibers with elevations and depressions whereby the distance between the elevations ranges from 0.04 to 100 microns and the height of the elevations ranges from 0.04 to 100 microns;
• providing particles of a size of 0.04 to 50 microns;
• and fixing said particles to the fibers by means of a wet-laying method using a binder together with a water-repelling agent.

A micro-structured paper or paper-like product having a self-cleaning and/or non-adhesive effect comprising:

• a paper or paper-like material having a first surface and a second surface, wherein at least the first surface comprises alternating elevations and depressions, whereby the distance between the elevations ranges from 0.04 to 100 microns and the height of the elevations as determined from the depressions ranges from 0.04 to 100 microns;
• particles having a size of 0.04 to 50 microns in an amount between about 5% and about 65% by weight of the paper or paper-like material, wherein the particles comprise an hydrophillic inorganic material bound to at least the first surface of the paper or paper-like material by means of a binder in an amount of about 1% to about 20% by weight of the paper and a first water-repelling agent in the amounts of 0.5 to 10% by weight of the paper or paper-like material applied by a wet-laying method;
• wherein said paper or paper-like material is hydrophobic across the entire cross-section of the material and exhibiting a contact angle greater than 155° and substantially no hysteresis between advance contact angle and receding contact angle.