A self-sealing elastomer composition that includes a diene elastomer, a hydrocarbon resin with a given softening temperature, and a liquid plasticizing agent, is manufactured according to a process that includes successive stages. In one stage, the hydrocarbon resin is incorporated in the diene elastomer by kneading the resin and the elastomer in a mixer at or up to a temperature referred to as hot compounding temperature, which is greater than the softening temperature of the resin, in order to obtain a masterbatch. In another stage, the liquid plasticizing agent is incorporated in the masterbatch by kneading the agent and the masterbatch in the same mixer or in another mixer, in order to obtain the self-sealing composition. The self-sealing composition then is formed dimensionally.

A dynamically vulcanized alloy containing an elastomer and a thermoplastic resin is prepared by a process wherein supercritical fluid is injected into the thermoplastic elastomeric material as the material is mixed in an extruder. The material is mixed under conditions such that the thermoplastic elastomeric material is dynamically vulcanized wherein the elastomer forms a discontinuous dispersed of small particles in a continuous phase of the thermoplastic resin. The DVA material may then be directly formed into film or sheets by the use of at least one set of rolls located adjacent to the extruder outlet.

Disclosed is a materials handling system, a patterned product, and process of fabricating a patterned product. The materials handling system includes an agitation portion having one or more agitators, the agitators arranged and disposed to mix colored particles into a substantially uniform distribution. A processing portion includes a receiving portion arranged and disposed to receive the substantially uniform distribution of the colored particles to form a product with a predetermined pattern. The predetermined pattern is a long-grained, striated or jaspe-grained color pattern. The process includes fabricating a product having such a predetermined pattern. The predetermined pattern is through-patterned as to include colors and textures distributed uniformly throughout the thickness of the product.

Disclosed is a materials handling system, a patterned product, and process of fabricating a patterned product. The materials handling system includes an agitation portion having one or more agitators, the agitators arranged and disposed to mix colored particles into a substantially uniform distribution. A processing portion includes a receiving portion arranged and disposed to receive the substantially uniform distribution of the colored particles to form a product with a predetermined pattern. The predetermined pattern is a long-grained, striated or jaspe-grained color pattern. The process includes fabricating a product having such a predetermined pattern. The predetermined pattern is through-patterned as to include colors and textures distributed uniformly throughout the thickness of the product.

The extrusion of polymer compositions based on polyvinyl chloride (PVC) and in particular to a method in which polymer compositions are produced that have an elongation at break of at least 200%, a tensile strength of at least 10 N/mm2 with a specific energy input SEI of 0.03 to 0.20 kWh/kg and in particular 0.04 to 0.16 kWh/kg. The method is expediently carried out such that a plasticiser is added in a plurality of portions to the non-composed polyvinyl chloride and mixed into said polyvinyl chloride. The method thereby offers a fast and simple possibility of producing products from finished soft PVC, the production of said products requiring only a single processing device in the form of an extruder.

In the process for producing a rubber for manufacturing a tire: a calender forms a ply with a mixture of ingredients of the rubber while a conveyor moves the ply in a first direction, a mass of product other than the rubber is deposited on the ply, and the conveyor displaces the ply in a second direction, such that the mass is arranged between two faces of the ply extending one against the other.

In the process for producing a rubber for manufacturing a tire: a calender forms a ply with a mixture of ingredients of the rubber while a conveyor moves the ply in a first direction, a mass of product other than the rubber is deposited on the ply, and the conveyor displaces the ply in a second direction, such that the mass is arranged between two faces of the ply extending one against the other.

A production line (200) for performing multi-pass mixing sequences of rubber mixtures has at least one first mixing line (200A) that produces a masterbatch and at least one second line (200B) that performs a final mixing process during a final pass of a multi-pass rubber mixing sequence. A mixing process produces a variety of rubber mixtures in a production line of the type disclosed.

A rolling assembly, including at least one roll pair with two cooperating rolls and a safety device. The safety device includes a hydraulic accumulator and a measuring device. The hydraulic accumulator includes an accumulator with a first and second accumulator chamber. A hydraulic fluid is disposed within the first accumulator chamber. A compressible gas is disposed within the second accumulator chamber. The hydraulic accumulator includes a moveably arranged separating member separating the first accumulator chamber from the second accumulator chamber. The roll pair has a working position and a safety position. A radial distance between the rolls is larger in the safety position than in the working position. The hydraulic accumulator is configured to move the roll pair from the working position to the safety position. The measuring device is configured to continuously detect a position of the separating member within the hydraulic accumulator.

A rolling assembly, including at least one roll pair with two cooperating rolls and a safety device. The safety device includes a hydraulic accumulator and a measuring device. The hydraulic accumulator includes an accumulator with a first and second accumulator chamber. A hydraulic fluid is disposed within the first accumulator chamber. A compressible gas is disposed within the second accumulator chamber. The hydraulic accumulator includes a moveably arranged separating member separating the first accumulator chamber from the second accumulator chamber. The roll pair has a working position and a safety position. A radial distance between the rolls is larger in the safety position than in the working position. The hydraulic accumulator is configured to move the roll pair from the working position to the safety position. The measuring device is configured to continuously detect a position of the separating member within the hydraulic accumulator.