Abstract:
For producing an aliphatic polyester resin composition containing a thermal stabilizer and a carboxyl group-capping agent, the aliphatic polyester resin is first mixed in a hot-melt state with the thermal stabilizer and then mixed in a hot-melt state with the carboxyl group-capping agent. As a result thereof, the resultant aliphatic polyester resin composition is provided with better moisture resistance and noticeably improved heat resistance (less coloring) than in the case where these additives are simultaneously added to effect the hot-melt mixing.
Abstract:
A process is provided for forming a building product having a color variation representative of a “natural” building material. The process includes feeding a first amount of a first material and a second amount of a second material to an extruder, mixing at least a portion of the first amount with at least a portion of the second amount in the extruder to form a third material, and extruding the third material from the extruder to form a product from the extruded third material. The formed product has a color variation representative of a “natural” building material such as ceramic, clay, wood, slate, stone, brick, concrete, metal, etc. The first material is formed of a first fiber, a first resin, and a first colorant. The second material is formed of a second fiber, a second resin, and a second colorant, wherein the second colorant is different than the first colorant.
Abstract:
A method of making the saturated aircraft brake preform using a coal tar pitch having a softening point in the range of about 160° C. to 240° C. Also, a product having natural rubber in the formulation and the method of making the product using a coal tar pitch having a softening point in the range of about 140° C. to 200° C. A mesophase pitch is formed from quinoline insoluble free coal tar pitch distillate from a high efficiency evaporative distillation process.
Abstract:
A method for minimizing nanofiller agglomeration within a polymeric material includes the step of introducing the nanofiller at predetermined parameters into an extruder having the polymeric material therein. The nanofiller introduction is downstream of the area of the extruder wherein the polymeric material had been substantially melted and mixed. After the nanofiller introduction, the melted polymeric material has the nanofiller dispersed therewithin substantially without agglomerated nanofiller. Then the melted polymeric material having nanofiller dispersed therewithin exits the extruder before nanofiller agglomeration occurs.
Abstract:
A method and apparatus for post mixing an additive with a hot melt adhesives. The method includes the steps of providing a source of molten hot melt adhesive, feeding the hot melt adhesive to an inlet of a mixer, simultaneously feeding an additive for the hot melt adhesive to the inlet of the mixer, mixing the additive and molten hot melt adhesive in the mixer to form a homogeneous mixture, and recovering the homogenous mixture. The additive is preferably selected from wetness indicators, antimicrobial agents, pigments, dyes, ultraviolet light absorbers, antioxidants, fluorescent agents, pH indicators and fragrances. The method may be practiced either on a batch basis, or on a continuous basis. The apparatus includes a vessel containing molten hot melt adhesive, a mixer located downstream from the vessel, the mixer having an inlet and an outlet, a first pump located between the vessel and the mixer for pumping molten hot melt adhesive from the vessel to the inlet of the mixer, a source of an additive for the hot melt adhesive, and a second pump located between the source of the additive and the mixer for pumping the additive to the inlet of the mixer. The mixer may comprise either a static mixer or a dynamic mixer.
Abstract:
In manufacturing glass fiber-reinforced resin moldings a peroxide is mixed into a molding material prepared by mixing glass fibers with a thermoplastic resin, and such a molding material is molded. The peroxide is fed together with the molding material in an injection molding machine, the molding material is heated and kneaded in the molding machine, and the glass fiber mixed molten resin is injected into a mold to obtain a molded body.
Abstract:
Finely divided mixtures of 97-10% by weight of at least one amphiphilic polymer whose softening point is above 35.degree. C., and 3-90% by weight of at least one inorganic solid with a particle size not exceeding 500 .mu.m are prepared by heating the two components to a temperature which is above the softening point of the polymer, mixing the components, dispersing the melt and rapidly cooling to a temperature at which virtually no inhomogeneity occurs and, where appropriate, further comminuting the particles at temperatures below 50.degree. C. to a particle size of from 50 .mu.m to 5 mm, and are used as additive to detergents.
Abstract:
A composition comprising polyethylene having from about 0.002 to about 1 weight percent of indigo dye uniformly melt dispersed therein. The average particle size of the dispersed indigo being less than about 1 micron. And the process for coloring polyethylene which comprises blending indigo into melted polyethylene at a concentration of from about 0.002 to about 1 percent by weight of polyethylene until a uniform dispersion is obtained.
Abstract:
A pigmented composition which is produced by forming a thin layer of thermoplastic resin, depositing a film of pigmenting material onto the surface thereof, and then agitating the layer with the film thereon to break it into pieces to form said composition.