Abstract:
A conductive composition comprising a vapor grown carbon fiber having an aspect ratio of 40 to 1,000, preferably 65 to 1,000, and a specific surface area or fiber diameter of the fiber within a predetermined range, and a preferable peak intensity ratio (I0=I1360/I1580) of 0.1 to 1, wherein I1580 represents a peak height at 1,580 cm−1 and I1360 represents a peak height at 1,360 cm−1 in a Raman scattering spectrum; and a resin composition containing the composition; and a production method thereof. The present invention provides: i) a composition which exhibits stable conductivity and less deterioration in physical properties during any molding methods in a conductive plastic in which a conductive filler is dispersed in a polymer; ii) a composite material composition for precision molding which enables production of a molded product with low warpage and is excellent in mechanical properties and performance during the injection molding; and iii) a sliding member composition which exhibits durability under high temperature and heavy load and has a low friction coefficient.
Abstract:
A colored particle (e.g., a spherical particle) comprising an organic solid component (e.g., a polymer component) and a coloring agent (e.g., an oil-soluble dye, and an organic or inorganic pigment) is produced by eluting a water-soluble auxiliary component comprising at least an oligosaccharide from a composition having a disperse system, in which a particulate dispersed phase comprising the organic solid component and the coloring agent is dispersed in a matrix comprising the auxiliary component. The weight ratio of the polymer component relative to the auxiliary component may be about 55/45 to 1/99. The proportion of the coloring agent may be about 0.001 to 100 parts by weight relative to 100 parts by weight of the organic solid component. Such a process ensures conveniently and industrially advantageous production of a colored particle (e.g., a colored polymer particle) corresponding to the dispersed phase independently of affinity between the dispersed phase and the matrix.
Abstract:
A thermoplastic resin composition including: a matrix including a thermoplastic resin and an elastomer; and carbon nanofibers dispersed in the matrix. The elastomer includes an unsaturated bond or a group having affinity to the carbon nanofibers.
Abstract:
A method for adding an additive into a polymer melt, preferably a polyester polymer melt such as polyethylene terephthalate (PET), comprising: a. discharging a polymer melt from a reactor to form a discharged polymer melt stream, and b. solidifying said discharged polymer melt stream, and c. prior to solidification, feeding a portion of the discharged polymer melt stream to a slipstream to form a slipstream polymer melt, and d. feeding an additive into said slipstream polymer melt to form an additive containing slipstream, and e. feeding the additive containing slipstream to a location upstream from the feed location forming said slipstream
Abstract:
[Problems] To produce a resin composition from a waste plastic material composed of a major portion of a thermoplastic resin and a small amount of incompatible solid foreign material. [Means for solving problems] A reclaimed resin composition which is produced by mixing a pulverized waste plastic material containing a major portion of a thermoplastic resin and a small amount of a non-thermoplastic solid foreign material with a light-shielding component and a light-shielding filler to give a mixture and melting the mixture under heating, and a sheet made from which shows a relationship between a lightness and a light transmittance satisfying the following condition: (A×B)≦4000 wherein A means a lightness of a sheet of 3 mm thick having been made of the reclaimed resin composition, and B means a total light transmittance (%) of a sheet of 50 μm thick having been made of the resin composition.
Abstract:
Described are methods that utilize high efficiency evaporative distillation to make a high softening point coal tar pitch, a quinoline insoluble-free and ash-free coal tar pitch having a desired softening point, and a mesophase coal tar pitch. Each of the methods uses a feed coal tar pitch having a softening point in the range of 70° C. to 160° C. The methods may be carried out using appropriate conventional distillation equipment, a wiped film evaporator, or a thin film evaporator.
Abstract:
Polymeric composites and methods of manufacturing polymeric composites are described. In one embodiment, a set of microcapsules containing a phase change material are mixed with a dispersing polymeric material to form a first blend. The dispersing polymeric material has a latent heat of at least 40 J/g and a transition temperature in the range of 0° C. to 50° C. The first blend is processed to form a polymeric composite. The polymeric composite can be formed in a variety of shapes, such as pellets, fibers, flakes, sheets, films, rods, and so forth. The polymeric composite can be used as is or incorporated in various articles where a thermal regulating property is desired.
Abstract:
The present invention discloses a method for dispersing and exfoliating fillers in a thermoplastic polymer by sonicating a mixture of the thermoplastic polymer and the filler. The method of the present invention is particularly useful in dispersing layered silicate clays in thermoplastic polymers. A reinforced composite comprising a filler dispersed in a thermoplastic polymer is also disclosed. In another variation, the method of the invention is incorporated into conventional plastic extruder and injection molding equipment.
Abstract:
A continuous process for the preparation of a thermoplastic molding composition is disclosed. Accordingly a first stream containing a molten polymer and at least one additive is introduced into a second extruded stream that contains a molten polymer to produce a combined stream. The temperature of the first stream that is below that of the second stream. The additive is in either liquid form, in solution or in dispersion.
Abstract:
The invention relates to a method of producing molded articles of at least one thermoplastic natural polymer and one small particle comprised natural filler. The melted thermoplastic natural polymer is mixed with the small particle comprised filler to a pasty material mixture and shaped into the molded article. According to the invention it is intended that the small particle comprised natural filler is impregnated and/or wetted with an additive prior to the production of the pasty material mixture.