In a cost-effective and qualitatively better method for producing spacers for a winding unit of an electrical high-voltage device, at least two starting components are mixed together in a mixing chamber under vacuum to form a component mixture. The component mixture is transferred to an extrusion housing, likewise under vacuum, of an extruder in which a transport device is arranged and which is equipped with a mouthpiece delimiting an outlet opening. The extrudate exiting from the mouthpiece is cured by the addition of heat in a vacuum in order to obtain the spacers.

A twin-screw extruder is configured to produce rolls of plastic stretch film on a continuous basis, starting from the extrusion of granules of one or more polymers an using cast extrusion.

A method of manufacturing a film for tire used in an air penetration preventing layer of a pneumatic tire, composed of a thermoplastic elastomer with an elastomer component dispersed within a thermoplastic resin includes performing heat treatment on the film for tire formed by inflation molding or cast molding in a state of being wound in a roll together with a liner material configured to regulate deformation of the film for tire, the heat treatment being at a heat treating temperature equal to or higher than a glass transition temperature of a resin with a highest glass transition temperature in the thermoplastic resin included in the film for tire.

In a cost-effective and qualitatively better method for producing spacers for a winding unit of an electrical high-voltage device, at least two starting components are mixed together in a mixing chamber under vacuum to form a component mixture. The component mixture is transferred to an extrusion housing, likewise under vacuum, of an extruder in which a transport device is arranged and which is equipped with a mouthpiece delimiting an outlet opening. The extrudate exiting from the mouthpiece is cured by the addition of heat in a vacuum in order to obtain the spacers.