An extruder includes a screw for extruder provided with a screw element for kneading a raw material, and a barrel including a cylinder portion in which the screw is inserted so as to be rotatable. A plurality of screw elements identical with the screw element are provided in a longitudinal direction of the screw under a certain rule. The barrel is integrated by combining a plurality of barrel blocks blocked. Each of the plurality of barrel blocks is configured in accordance with a length of the screw element provided in the longitudinal direction of the screw.

Provided is a resin composition comprising an ethylene-vinyl alcohol copolymer (A), a hydrate-forming metal salt (B), and a polyamide-based resin (C) that inhibits elution of a resin composition layer during hot water sterilization treatment of a multilayered structure including the resin composition layer, while suppressing odor during melt molding of the resin composition. An aromatic polyamide (C1) and an aliphatic polyamide (C2) are used for the polyamide-based resin (C) at a proportion of (C1)/(C2)=55/45-99/1.

A tire tread and a tire are provided, more particularly, a tire having a tread or other elastomeric component within enhanced composite material properties, including, but not limited to, modulus ratio, percent elongation at break, and/or tan delta, wherein the tire, tread or other elastomeric component comprise composites characterized by well dispersed reinforcing filler, which can be indicated by macrodispersion.

An acrylic rubber sheet excellent in storage stability and water resistance, a method for producing the same, a rubber mixture containing the acrylic rubber sheet and a rubber cross-linked product thereof are provided. The acrylic rubber sheet according to the present invention includes an acrylic rubber having a reactive group and having a weight average molecular weight (Mw), a ratio of a Z-average molecular weight (Mz) and a weight average molecular weight (Mw) in a specific range. The acrylic rubber sheet according to the present invention has an ash content of 0.2% by weight or less, an amount of gel insoluble in methyl ethyl ketone is 50% by weight or less, and a water content of less than 1% by weight, and is excellent in water resistance and highly well-balanced in strength properties and processability.

A continuous production device and method for a silane-modified sealing material are provided. The device includes a twin screw extruder set, a cooling unit, and a static mixing unit; where the twin screw extruder set includes at least two twin screw extruders in series, each of which is provided with at least two inlets and at least one vacuum port, the cooling unit is disposed between last two stages of the twin screw extruders, and an outlet of a last-stage twin screw extruder is connected to the static mixing unit. Through the arrangement of various units of the device and their positional relations, components can be mixed in sequence or added in stages, so as to adapt to the characteristics of each component; a heat stabilizer and a polymer are added together as raw materials, which can increase the temperature for dehydration and avoid thermal decomposition of the polymer, and they cooperate with a dehydrant to make water in the system easier to remove; and the device has high operation flexibility and can adapt to the requirement of variability of a formulation of the silane-modified sealing material.

The present invention concerns a method and a plant for the production of polymeric adhesives comprising the steps of dosing of the base material into a mixer (31) by means of a first metering device (11), dosing of the catalyst material into the mixer (31) by means of a second metering device (21), mixing the base material and the catalyst material in a mixture by means of the mixer (31), packing the mixture in storage containers. Moreover, the method of manufacturing comprises a step of managing a first temperature, by means of first temperature control means of the base material and catalyst material, wherein the base material and the catalyst material are kept within a predetermined range of temperature such as to prevent the formation in the mixer (31) of the polymeric adhesive in an oligomeric state. Furthermore, the method of manufacturing comprising a step of managing a second temperature, by means of second temperature control means of the mixture, wherein the mixture is kept within the predetermined range of temperature such as to prevent the formation in the storage containers of the polymeric adhesive in an oligomeric state. Finally, the method of manufacturing comprises a step of cooling the storage containers able to slow down the formation in the storage containers of the polymeric adhesive in an oligomeric state.

A method and a facility produce polylactide (PLA) by polymerization, in which a lactide mixture is mixed with at least one catalyst, is introduced into a modular planetary roller extruder and the finished PLA is then removed. The lactide mixture continuously passes through segments of the extruder. The course of the reaction is measured and controlled in the segments in a targeted manner such that the temperature can be set by heating and/or cooling. The pressure can be variably set depending on pressure values to be checked by a controllable gas extraction and/or a controllable extruder speed and/or static variability of the planetary rollers and/or a variable metering speed of the lactide mixture and/or a variable mixing ratio of the lactide mixture. Flammable gas is removed in an explosion-protected zone in a partial region of the extruder. Additives are introduced into the extruder during the rolling process.

A main extruder and a side arm extruder are used in the extrusion of plastics with small amounts of additives or other small substances to be admixed. A minor portion of the plastic material is premixed with small quantity additive substances in a side arm extruder. The premixed material is discharged from the side arm extruder into the main extruder and there mixed with a major portion of feed material.

In one aspect, the present disclosure is directed to a method of manufacturing a substance having an improved tensile strength for additive manufacturing. The method can include providing raw material having a first tensile strength. The raw material can include a polymer. The method can include providing a filler material. The filler material can include clay, single wall carbon nanotubes, multi-wall carbon nanotubes, or boron nitride. The method can include cavitating, within a hydrodynamic cavitation chamber, the raw material and the filler material to produce a substance having a second tensile strength greater than the first tensile strength.

The invention describes a method for manufacture of plasticized homopolymeric polyvinyl alcohol, the method including the steps of introducing a polyvinyl alcohol polymer or a blend thereof having a degree of hydrolysis in the range of 93 wt % to 98 wt % into a mixing reactor; adding a processing agent, a plasticizer and a reactive stabilizer to form a reaction mixture; wherein the plasticizer is selected from the group consisting of sugar alcohols, diols, triols, polyols and mixtures thereof; wherein the reactive stabilizer is selected from the group consisting of sodium stearate, potassium oleate, sodium benzoate, calcium stearate, stearic acid, dimethyl propionic acid, and mixtures thereof;-reacting the reaction mixture in a reaction zone to form plasticized polymer; and-allowing the plasticized polymer to pass from the reaction zone.