Patent ID: 11932755
Assignee: HUTCHINSON
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B  F | IPC B  C  F

Claim 11:
12. The crosslinkable rubber composition according to claim 1, in which the crosslinkable rubber composition has, after passing through an extrusion die, a pressure applied to the crosslinkable rubber composition measured at an outlet of the die that is continuously comprised between 25·105 Pa and 70·105 Pa, with the die having the following characteristics:
a conveying screw of diameter D equal to 25 mm and of length equal to 12D,
a feed belt 2 to 3 cm wide,
a feed roller cooled with a water circulation system,
a screw body heated to 85° C. by a regulator by means of water,
the die being heated to 95° C. or 110° C. by a heating ring,
said pressure applied to the crosslinkable rubber composition at the outlet of the die being measured by a sensor at a head of the screw,
a speed of the screw varying between 4 and 20 rpm regulated according to an aspect of the extruded crosslinkable rubber composition at the outlet of the die, and
a conveyor belt on which the crosslinkable rubber composition is disposed for the driving thereof.