Moire flooring and process for its manufacture

Details Moire flooring and process for its manufacture Moire flooring and process for its manufacture

E - Fixed Constructions

04

F

E04F 15/16 (2006.01) B29C 69/00 (2006.01) B29C 69/02 (2006.01)

Patent

CA 2170791

A floor covering is disclosed which is made of rubber and has a moiré pattern. The floor covering is made by a process including the steps of continuously feeding two or three differently coloured strips of vulcanizable, elastomeric material into a worm extruder having a perforated length to diameter ratio of 6:1 and at a working temperature of 60 to 100°C; extruding the elastomeric material through a perforated disk having 200 to 600 cylindrical bores with a diameter of 3 to 5 mm; cutting the extruded strands to particles of 1 to 2 mm length; and cooling the particles on a cooling line of 4 to 6 m length. The particles are then fed into the gap of a dual roller calender which preferably can be heated and cooled. The compressed web exiting the calender is fed through a continuous volcanization installation and exits the latter as a finished floor covering. The material throughput in the process is adjusted to 700 to 1300 kg/h. The floor covering has a moiré-type pattern which, due to its oriented but not predominent pattern, can be used especially for sports facilities such as gymnasiums and without any protective coating.

Cette invention concerne un revêtement sol moiré en caoutchouc. Il est produit selon un procédé qui comprend les étapes suivantes : introduction en continu de deux ou trois bandes d'élastomère vulcanisable de couleurs différentes dans une extrudeuse à vis caractérisé par un rapport longueur perforée-diamètre de 6:1 et portée à une température de service comprise entre 60 et 100 degrés Celsius; extrusion de l'élastomère à travers un disque perforé comptant entre de 200 et 600 trous cylindriques dont le diamètre va de 3 à 5 mm; découpe des brins obtenus en particules de 1 à 2 mm de longueur; et refroidissement de ces particules dans un refroidisseur de 4 à 6 m de longueur. Les particules refroidies sont alors acheminées à l'entrée d'une calandre à deux cylindres pouvant de préférence être chauffés et refroidis. La bande comprimée sortant de la calandre est acheminée à travers une installation de vulcanisation en continu dont elle sort sous forme de revêtement de sol souple. La quantité de matière première traitée à l'heure est comprise entre 700 et 1300 kg. Le produit fini est moiré en raison de son motif orienté mais non prédominant. Particulièrement adapté aux installations sportives telles que gymnases, il n'exige aucun enduit protecteur.

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