Substantially proportional drawing die for polymer compositions

Details Substantially proportional drawing die for polymer compositions Substantially proportional drawing die for polymer compositions

B - Operations, Transporting

29

C

B29C 55/30 (2006.01)

Patent

CA 2668283

An inventive solid state drawing die (100) has shaping walls (6) that define a shaping channel and that, in the course of solid state drawing, direct polymer composition along a drawing path. Each cross section of the drawing path (and, hence, polymer composition in the drawing path) is non- circular, substantially proportional to one another, contains a centroid that lies on a substantially straight line parallel to the drawing direction and all cross sectional dimensions are 1.5 millimeters or more.

Le moule d'étirement à l'état solide (100) selon l'invention comprend des parois de formage (6) qui définissent un canal de formage et qui, au cours d'un étirage à l'état solide, dirigent une composition à base de polymère le long d'un chemin d'étirement. Chaque coupe transversale du chemin d'étirement (et par conséquent, la composition à base de polymère dans le chemin d'étirement) est non circulaire, sensiblement proportionnelle par rapport aux autres, contient un centre de gravité qui repose sur une ligne sensiblement droite parallèle à la direction d'étirement et toutes les dimensions en coupe transversale sont supérieures ou égales à 1,5 millimètres.

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