摘要:
A unitary, fiber-containing composite comprises (a) a first region comprising a plurality of first binder fibers and a plurality of bast fibers, (b) a second region disposed above the first region, the second region comprising a plurality of second binder fibers and a plurality of bast fibers, and (c) a transitional region disposed between the first region and the second region. The transitional region comprises concentrations of the first binder fiber, the second binder fiber, and the bast fiber. The concentration of the first binder fiber in the first transitional region is greatest proximate to the first region and least proximate to the second region, and the concentration of the second binder fiber and the bast fiber in the first transitional region is greatest proximate to the second region and least proximate to the first region. A method for producing a unitary, fiber-containing composite is also described.
摘要:
A moldable heat shield with a needled nonwoven core layer and needled nonwoven shell layers. The core layer has a blend polyester staple fibers and low melt polyester staple fibers. The shell layers have a blend of staple fibers of partially oxidized polyacrylonitrile, and staple fibers of polyester, and staple fibers of a low melt polyester. The layers are needled together such that fibers from the core layer do not reach the outer surfaces of the shell layers. The shell layers are calendared such that an outer surface layer is formed thereon, which provides the moldable heat shield with a water and oil resistant surface.
摘要:
A nonwoven composite has a first surface, a second surface, and a thickness extending between the first and second surfaces. The nonwoven composite comprises a plurality of natural fibers, a plurality of binder fibers, and a VOC-absorbing material. The binder fibers are bonded to or interlocked with the natural fibers. The VOC-absorbing material is dispersed within the nonwoven composite in such a manner that the density of the VOC-absorbing material in the nonwoven composite is greatest adjacent to the second surface of the nonwoven composite. A method for producing a nonwoven composite is also described.
摘要:
A non-woven material including first effect fibers, first binder fibers, second binder fibers, and bulking fibers. The non-woven material has a first planar zone with an exterior skin, and a bulking zone. The first planar zone includes a greater concentration of first effect fibers and first binder fibers. The bulking zone includes a greater concentration of bulking fibers and second binder fibers. The first effect fibers can be fire retardant fibers.
摘要:
A heat and fire resistant planar unitary shield formed of heat and flame resistant fibers and voluminous bulking fibers. The shield material has a heat and flame resistant zone with a majority of the heat and flame resistant fibers, and a voluminous bulking zone with a majority of the voluminous bulking fibers. The fibers are distributed through the shield material in an manner that the heat and flame resistant fibers collect closest to the outer surface of the shield with the heat and flame resistant zone, and the voluminous bulking fibers collect closest to the outer surface of the shield material with the voluminous bulking zone.
摘要:
A heat and fire resistant planar unitary shield formed of heat and flame resistant fibers and voluminous bulking fibers. The shield material has a heat and flame resistant zone with a majority of the heat and flame resistant fibers, and a voluminous bulking zone with a majority of the voluminous bulking fibers. The fibers are distributed through the shield material in an manner that the heat and flame resistant fibers collect closest to the outer surface of the shield with the heat and flame resistant zone, and the voluminous bulking fibers collect closest to the outer surface of the shield material with the voluminous bulking zone.
摘要:
A hockey puck has a generally cylindrical body having an upper face, a lower face and a circumferential wall with a generally spherical puck element secured centrally within the body and being rotatable with respect to the puck body. In a preferred embodiment, the generally spherical puck element has a weight greater than that of the body and a diameter greater than the distance between the upper face and lower face. The generally spherical puck element is secured within an inner member which in turn has a ring disposed radially outwardly thereof and secured to the inner member. The puck is structurally designed to have the generally spherical puck element have translational and rotational kinetic energy while the body will have translational or translational and rotational kinetic energy. This results an enhanced ability to maintain the puck on the desired path despite roughness of the surface on which it is moving or certain types of impact with other objects.
摘要:
Middle distillate petroleum streams are hydrotreated to produce a low sulfur and low aromatic product in a process employing three reaction zones in series. Hydrogen flows between the reaction zones countercurrent to the hydrocarbons. Hydrogen sulfide is removed from effluent of the first two reaction zones by hydrogen stripping. The second and third reaction zones employ a sulfur-sensitive noble metal hydrogenation catalyst. Operating pressure increases and temperature decreases from the first to third reaction zones.
摘要:
Although high naphthenic acid hydrocarbon feedstocks normally need to be washed with caustic prior to being sweetened in a fixed bed mercaptan-to-disulfide oxidation process to avoid bed plugging, the prewash can be eliminated if aqueous ammonia is used concurrent with and as a part of the sweetening process. Aqueous ammonia injected into a sour hydrocarbon stream prior to the sweetening zone not only eliminates bed plugging, but affords an aqueous phase from which naphthenic acids may be recovered easily and economically. The ammonia also can be recovered for reuse, affording a process with considerably enhanced economic return.
摘要:
A process for obtaining glucose from thinned starch by partially hydrolyzing the latter to give from 50% to 92% glucose followed by separation of the hydrolysis product to afford a glucose-enriched product with recycling of the glucose-depleted stream affords benefits unattainable by conventional commercial processes. Substantial reductions in process time and reversion products and a substantial increase in productivity are among some of the benefits.