Device and method for preparation of a profiled element from an elastomeric thermoplastic gel

A method of producing a flat profiled element from an elastomeric gel, the method comprising steps of:

• arranging an extruder, such that an extruder die of the extruder is inclined at an angle between 20 and 70 degrees relative to a horizontal plane;
• introducing into at least one feed of the extruder constituents of an elastomeric gel, the constituents including at least a thermoplastic styrene elastomer and between 500 to 1000 pce of polyisobutylene as an extender oil;
• mixing the constituents to obtain a homogeneous plastic material;
• distributing the plastic material at an outlet of the extruder die, the outlet of the extruder die having a flat opening;
• arranging a liquid cooling bath to receive the plastic material from the outlet of the extruder die, such that a part of the cooling bath is less than 50 mm from the outlet of the extruder die;
• extruding the plastic material, such that the plastic material as extruded from the outlet of the extruder die has a width-to-thickness ratio greater than 5;
• cooling the extruded plastic material to obtain a flat profiled element;
• and
• receiving the flat profiled element on a flat moving support.