A production method comprising: (a) a step of melt-mixing a base resin containing a chlorinated polyethylene; an organic peroxide, an inorganic filler, and a silane coupling agent, in specific ratios, at a temperature equal to or higher than a decomposition temperature of the organic peroxide, to prepare a silane master batch; (b) a step of mixing the silane master batch obtained in the step (a) with a silanol condensation catalyst, and then forming the resultant mixture; and conducting at least one of the melt-mixing in the step (a) and the mixing in the step (b) is performed in the coexistence of a chloroprene rubber or a polyvinyl chloride; a heat-resistant chlorine-containing crosslinked resin formed body produced by the method, a silane master batch, a mixture and formed body thereof, and a heat-resistant product.

The present invention provides a method for producing a rubber composition containing a rubber component (A) which contains a copolymer of a conjugated diene compound and an aromatic vinyl compound, in which the conjugated diene compound amount in the copolymer is 50% by mass or more and 73% by mass or less and the molecular weight at the peak top of the molecular weight distribution of the polystyrene-equivalent number-average molecular weight of the copolymer as measured through gel permeation chromatography is 100,000 or more and 600,000 or less, a filler containing an inorganic filler (B), a silane coupling agent (C) and at least one accelerator (D) selected from guanidines, sulfenamides, thiazoles, thiurams, thioureas, dithiocarbamates and xanthates, wherein the rubber composition is kneaded in plural stages, and in the first stage (X) of kneading, the rubber component (A), all or a part of the inorganic filler (B), all or a part of the silane coupling agent (C) and the accelerator (D) are added and kneaded. The production method can produce a rubber composition excellent in low-heat-generation property and abrasion resistance.

A method of mixing a rubber composition includes a carbon introduction step and a uniform dispersion step. In the carbon introduction step, on the basis of a deviation between a rate of temperature increase of the rubber mixture (R) and a target value, at least one of a ram pressure (Pr) and a rotational speed (N) of the mixing rotor (2) is PID controlled so that the ultimate temperature of the rubber mixture (R) at the conclusion of the step is within a tolerance range. In the uniform dispersion step, the ram pressure (Pr) or the rotational speed (N) of the mixing rotor (2) is adjusted to reduce a deviation between a value based on successively detected data associated with a predetermined control target and a target value.

A kneader internal inspection device according to the present invention suspends and supports a photographing unit, which is arranged in an interior of a kneader and which photographs the interior, so as to be vertically movable in the interior of the kneader. Therefore, such a kneader internal inspection device is capable of easily inspecting the interior of the kneader.

In the field of mixing rubber mixtures, o a rotor (100), for use in an internal mixer having a mixing vessel in which the rotor rotates includes one or more blades (104), each blade having a tip (104a) with a profile having a predefined curvature and an anti-wear device detachably fixed to the tip (104a) of at least one blade. The anti-wear device includes a plate (110) with a profile defined by a lower surface (112) with a curvature complementary to that of the tip (104a) and an upper surface (114) with a curvature complementary to that of a wall of the vessel to define, between them, a zone of minimum distance that allows a passage of the mixture between the plate (110) and the wall of the vessel. One or more fastening systems (135) are fitted and tightened with respect to the plate (110) so as to engage the rotor (100).

An elastomer molded body for a medical device includes an elastomer portion and a filler. The elastomer portion contains a crosslinked fluorine-based elastomer. The filler is formed from a plurality of particles each of which has aspect ratio of 5 or more and specific surface area of 3 m.sup.2/g or more and 10 m.sup.2/g or less. The aspect ratio is defined as a ratio of a dimension in a long axis direction thereof to a dimension in a short axis direction thereof. The filler has an uneven distribution in a surface layer part of the elastomer portion and is oriented in a direction along a surface of the elastomer molded body.

A silica-containing rubber mixture includes at least one rubber, a sulphur-containing alkoxysilane, a crosslinking agent, a filler, and optionally further rubber auxiliaries, and the mixture also includes from 0.1 to 15 parts by weight, based on 100 parts by weight of rubber used, of a silicon-free polysulphide additive of the formula (I)
A-S—(S).sub.x—S—Y—S—(S).sub.x—S-A  (I)
where x is 0, 1 or 2, Y is an optionally substituted or heteroatom-containing aliphatic, cycloaliphatic or aromatic group, and A may include hydroxy, carboxy, or carboxyphenyl groups.

Disclosed are a continuous manufacturing process for a rubber masterbatch and a rubber masterbatch prepared therefrom. The manufacturing process comprises: 1): a filler is added to a rubber solution, forming a rubber/filler/solvent mixture by stirring; 2): the rubber/filler/solvent mixture obtained in step 1) is fed into a coagulator, and is coagulated after optionally being brought into contact and mixed with one or more fluids of nitrogen, steam, water, aqueous slurry of filler, and oil in the coagulator, resulting in a mixture of a rubber/filler composite and a solvent; 3): the mixture obtained in step 2) is directly passed into a heating medium at a temperature higher than the boiling point of the solvent, the polarity of the medium being different from that of the solvent used, the mixture is coagulated and deswelled, and the solvent is evaporated rapidly, thereby forming a mixture of a rubber/filler composite and the solvent containing the heating medium; and 4): the solvent is removed and the remaining mixture is dried, resulting in a rubber/filler masterbatch.

The present disclosure discloses a meshing-type rubber internal mixer and a working method thereof. The meshing rubber internal mixer includes a frame mechanism, a mixing mechanism, and an unloading mechanism. The mixing mechanism is on the upper side of the unloading mechanism. The mixing mechanism and the unloading mechanism are in the frame mechanism. An internal mixing chamber is of a closed structure through first automatic telescopic plates and second automatic telescopic plates. The gap between a first meshing-type rotor and a second meshing-type rotor is small, a material is compressed to enter the space between the first meshing-type rotor and the second meshing-type rotor to be extruded with an internal mixing chamber wall. The material is flaky in the internal mixing chamber, so that the material produces great strain deformation, thereby achieving excellent dispersing and mixing effects.

Thermoplastic polyurethane (TPU) compositions, methods for producing TPU compositions, methods of using TPU compositions, and apparatuses produced therefrom are disclosed. Disclosed TPU compositions include a thermoplastic polyurethane polymer, a heat stabilizer, a flow agent, and a filler material. The filler may be a glass fiber. Disclosed TPU compositions have improved thermal stability and improved flow properties suitable for injection molding of articles of manufacture having a large plurality of fine openings or pores. Articles produced from the composition have superior thermal stability, abrasion resistance, and chemical resistance. Example articles include screening members for vibratory screening machines.