Additive processing of fluoropolymers

A method of producing a fluoropolymer article by additive processing in an additive processing device containing at least one energy source, the method comprising

• (i) depositing a composition comprising fluoropolymer particles and a polymerizable binder to create a layer of the composition;
• (ii) exposing areas of the composition in the layer to the energy source to polymerize and solidify the binder and bind the fluoropolymer particles in the areas exposed to the energy source;
• and
• (iii) repeating steps (i) and (ii) to form successive layers of the fluoropolymer article;
• wherein the fluoropolymer is selected from the group consisting of
• (a) polytetrafluoroethylene, consisting of tetrafluoroethylene homopolymers and tetrafluoroethylene copolymers containing up to 1% by weight of perfluorinated alpha-olefin comonomers;
• and
• (b) tetrafluoroethylene copolymers containing more than 1% by weight and up to 30% by weight based on the weight of the polymer of perfluorinated comonomers, partially fluorinated comonomers and non-fluorinated comonomers.