摘要:
An undrawn yarn is produced at increased quench delay and increased take-up speed to achieve improved ultimate elongation at a given crystallinity. Particularly preferred aspects include products comprising such yarns and methods for producing same.
摘要:
An undrawn yarn is produced at increased quench delay and increased take-up speed to achieve improved ultimate elongation at a given crystallinity. Particularly preferred aspects include products comprising such yarns and methods for producing same.
摘要:
A permanent magnet motor has a rotor and a stator. The rotor has a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft adjacent to the rotor core, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator includes a magnetically conductive round housing, permanent magnets fixed to an inner surface of the housing, and brushes for making sliding contact with the commutator. The ratio of an outer diameter of the rotor core to an outer diameter of the housing is between 66% to 84%.
摘要:
An adapter card is used to convert the PCI Express X1 slot to CompactPCI Express X1 slot which is compatible with PICMG EXP.0 R1.0 specification in the commercial and industrial control computer. The adapter card includes the impedance controlled circuit board, the connecting circuit board, the PCI Express port, the CPCI Express signal socket, the CPCI power socket, the double row hole socket, the double row bent needle plug, the linking block and a dam-board. The adapter card expands the application of PCI Express X1 slots by a large margin and make it compatible with CPCI Express X1 card.
摘要:
A process for preparing ultra-high molecular weight poly(alpha-olefin) (UHMWPO) multi-filament yarns having improved tensile properties at higher productivity. The process includes drawing a solution yarn, then drawing a gel yarn and then drawing a dry yarn continuously in sequence to form a partially oriented yarn, winding up the partially oriented yarn, unrolling the yarn, drawing the partially oriented yarn to form a highly oriented yarn, cooling the highly oriented yarn under tension and winding up the highly oriented yarn.
摘要:
An improved process for solution spinning of ultra-high molecular weight polyethylene (UHMW PE) filaments, wherein the 10 wt % solution of the UHMW PE in mineral oil at 250° C. has a Cogswell extensional viscosity and a shear viscosity within select ranges.
摘要:
A robust process for the continuous preparation of solutions of high molecular weight UHMW PO that is capable of producing strong materials at high production capacity, is conservative of capital and energy requirements, and the articles made therefrom.
摘要:
Cellular transcription is modulated by increasing or decreasing the amount of active HEXIM1 in the cell. The methods are applied to the treatment of HIV infection and cardiac hypertrophy. Assays using reconstituted 7SK:P-TEFb snRNP screen for agents that modulate HEXIM1-P-TEFb binding.
摘要:
Gel-spun multi-filament polyethylene yarns possessing a high degree of molecular and crystalline order, and to the drawing methods by which they are produced. The drawn yarns are useful in impact absorption and ballistic resistance for body armor, helmets, breast plates, helicopter seats, spall shields, and other applications; composite sports equipment such as kayaks, canoes, bicycles and boats; and in fishing line, sails, ropes, sutures and fabrics.
摘要:
Methods and devices are provided to actively apply finish to one or more yarns in motion at speeds greater than about 3000 m/min, to achieve a finish application of 0.2 wt. % or more, and with a coefficient of variation of finish concentration of 10% or less. The devices are compact, portable and readily installed at a variety of positions on a fiber processing line. The devices of the invention contain the finish so that contamination of the surrounding areas is prevented. The devices may be used to provide an overfinish to a moving yarn between heated godet rolls. The so-provided heating may be used to dry the yarn and to promote curing reactions in the finish and between the yarn and finish compounds. The invention also includes the finished yarn products so produced. A yarn with increased finish uniformity is provided with an overfinish actively applied and dried on the draw bench before the first winding operation. The yarn products of the invention may be used in textile and leisure fiber applications, and in industrial fiber applications, such as in tires.