Extrusion International 5-2019

33 Extrusion International 5/2019 Lowering the Barriers Please visit us at our Booth C81 in Hall 10 nomic and environmental benefits in water distribution pipelines and it is currently being tested and introduced into the Gas distribution networks. The jacket is made of a specially modified polypropylene material, which protects the surface of the inner pipe against potential notches and cracks generally associated with demand- ing installation methods such as pipe bursting or wash- boring. Even extremely deep notches in the protective jacket will not be transferred to the inner pipe when it is eventually exposed to service-related stresses. The core pipe is instead made from PE resins. The dimensions of the core pipe match those of standard solid wall PE pipes. “Adhered” to the outer wall of the PE core pipe there is a tough skin, which is typically 0.6 to 0.7 mm thick for all current dimensions of this new multilayered pipes. The “skin” is added by a cross-head positioned before the last cooling bath. To fulfill the needs of coated pipes production with pro- tective layers, Tecnomatic has developed a full range of die-heads, based on spiral or radial technology suitable for both plastic or metal pipes coating with range from 5 to 800 mm, and solutions up to 4 layers. The die-heads are based on a typical spiral technology for large and single layer co-extrusion, while combined solutions with radial distributors or short path spiral are offered according to material characteristics or volume as for PA, EVOH, PVDF or adhesive bonds. TECNOMATIC S.r.l. Via Emilia, 4, 24052 Azzano S. Paolo (Bergamo) Italy www.tecnomaticsrl.net K 2019: Hall 16, Booth D05 Big size steel pipe coating