Abstract: An electric wire that has a conductor held by spacers in a covering of PTFE, continuous cells being formed between the covering, the spacers, and the conductor. In an axial section, the majority of the PTFE fibers of the spacers point in a substantially radial direction, thereby imparting excellent robustness to the spacers. A method of manufacturing such an electric wire, in which method an extrudate of PTFE is caused to pass through an extrusion passage around the conductor in such a manner as to form the covering; so that: upstream from an expansion section, the covering is formed by a guide; and downstream from this section, the cells are formed by section members, the spacers being formed by filling expansion channels situated between walls of the section members.

Abstract: Thermoforming a plastics material part, in particular a plate. According to the invention, the thermoforming unit comprises at least two molds (2, 3) of respective shapes that enable the shape of the material (1) being worked to be caused to vary progressively up to a final mold giving the desired shape. A thermoforming method using such a thermoforming unit.

Abstract: The present invention relates to a fluoropolymer-based coating material in tape or varnish form suitable for laser marking and containing as additive from 0.5% to 5% by weight of at least one polyimide comprising repeating units which include at least one group Ar—X—Ar?, in which Ar and Ar? represent independently an optionally substituted monovalent or divalent aryl group and X represents a —CO— or —S— group, the said polyimide being essentially free from heteroatoms or heteratomic groups other than —S— and other than the imide groups.