Provided is a method for producing a shaping material that contains a cyclic olefin polymer and has a low content of a volatile impurity. This method for producing a shaping material is a method which includes passing a raw-material resin in a molten state through an extruder to produce a shaping material, and in which the extruder is equipped with a cylinder, a screw housed within the cylinder, a resin introduction port for introducing the raw-material resin into the cylinder, a resin discharge port for discharging the molten resin from the cylinder, a fluid injection port for injecting carbon dioxide or water into the cylinder between the resin introduction port and the resin discharge port, and a fluid discharge port for removing fluid in the cylinder by suction downstream of the fluid injection port and between the resin introduction port and the resin discharge port.

One embodiment provides a twin-screw extruder which is used to knead materials and has excellent productivity. The twin-screw extruder includes screws. The screws include double thread screws in which first screw portions engage with each other. Ratio D1/C of external diameter D1 of the first screw portion to a shaft distance C ranges from 1.25 to 1.40. The screws further include triple thread screws in which third screw portions engage with each other. Ratio D3/C of external diameter D3 of the third screw portion to the shaft distance C ranges from 1.05 to 1.10. External diameter D2 of a second screw portion decreases gradually from the first screw portion toward the third screw portion.

The invention relates to an improved method and to an improved device for degassing polymer melts and for neutralizing the thus produced pollutants, characterised by the following characteristics: said pollutants are guided to a plasma source after removal from the degassing area and prior to adding to a filter step or a separator, said plasma source being built and/or formed such that in said plasma source, the pollutants are transformed, entirely or partially, in a plasma aggregate state.

In a thermal decomposition extruder, a hopper has an upper end closed. A sidewall of the hopper is provided with an emission hole for emission of decomposition gas produced during thermal decomposition of a polymer, to the outside of the hopper.

Provided is a method for producing a shaping material that contains a cyclic olefin polymer and has a low content of a volatile impurity. This method for producing a shaping material is a method which includes passing a raw-material resin in a molten state through an extruder to produce a shaping material, and in which the extruder is equipped with a cylinder, a screw housed within the cylinder, a resin introduction port for introducing the raw-material resin into the cylinder, a resin discharge port for discharging the molten resin from the cylinder, a fluid injection port for injecting carbon dioxide or water into the cylinder between the resin introduction port and the resin discharge port, and a fluid discharge port for removing fluid in the cylinder by suction downstream of the fluid injection port and between the resin introduction port and the resin discharge port.

A process for the continuous production of cured rubber membrane, the process comprising (i) preparing a continuous stream of curable rubber composition; (ii) forming the continuous stream of curable rubber composition into a continuous green-rubber extrudate; (iii) curing the continuous green-rubber extrudate to form a continuous cured membrane; and (iv) fabricating the continuous cured membrane into rolls of cured membrane, where the curable rubber composition is characterized by at least one of a t90 at 190? C. of from about 1 to about 12 minutes and a T5 at 135? C. of from about 5 to about 20 minutes.

A device for preparing a liquid polymer blend is proposed having a storage container for the liquid polymer blend; a degassing device, which is arranged downstream of the storage container, for the liquid polymer; a gassing device, which is arranged downstream of the degassing device, for adding an additive gas to the liquid polymer blend; a homogenization unit, which is arranged downstream of the gassing device, for the polymer blend to which the additive gas was added; and an output line, which is connected to the homogenization unit, for the homogenized polymer blend.

A method for regenerating a used resin includes adding 0.03 wt % to 0.3 wt % of an amine compound-based VOC capturing agent to the used resin, performing melt-mixing, capturing at least formaldehyde and acetaldehyde among VOCs contained in the used resin by the VOC capturing agent, and vaporizing and removing volatile odor substances contained in the used resin by decompression.

Apparatus for degassing a plasticizable material, wherein the apparatus has at least one passage having a inlet opening for the feed of the material in the plasticized state. Provided downstream of the at least one passage in the flow direction of the plasticized material is a plurality of substantially parallelly arranged partial passages so that a material flow flowing through the passage is split up into partial flows by the partial passages, and the partial passages open into a free space so that the material expands in the free space, wherein at least one of the partial passages has a taper.

A system for halogenating olefinic-based elastomer, the system comprising a first extruder, a first kneader vessel downstream of said first extruder and in fluid communication with said first extruder, a second extruder downstream of said first kneader vessel and in fluid communication with said first kneader vessel, a second kneader vessel downstream of said second extruder and in fluid communication with said second extruder; and a third extruder downstream of said second kneader vessel and in fluid communication with said second kneader vessel.