摘要:
Spacers suitable for installation between selected barrel sections of extruders are useful in evaluating the incidence of corrosion within the extruder. Processes for the deployment of such spacers are also disclosed.
摘要:
A low profile holographic sight includes a base having a mounting mechanism and a body mounted on the base for housing a laser diode, an associated electronic control and power source, and optical elements including a collimator, a transmission image hologram of the reticle pattern, and a reflective diffraction grating, wherein the optical elements are arranged within the body to direct and fold the laser beam in a substantially generally horizontal path, and is insensitive to drift in laser wavelength. The optical elements superimpose an image of the reticle pattern over the direct view of the target scene in a generally parallel and close relationship with the barrel of a firearm, such as a shotgun or a rifle, upon which the sight is mounted.
摘要:
Shaped articles having polyamide and metal layers are disclosed having improved barrier resistant properties. These are suitably bonded by a carboxyl-substituted polyolefin that acts to chemically secure the polyamide and metal layers together. Methods for the preparation of these articles and their use in a variety of applications are also disclosed.
摘要:
An improved digital camera is provided that detects pictures of human subjects whose eyes are not closed. The improved digital camera generally includes an eye detection activation element that is operable to initiate an eye detection mode; an image sensor that captures image data for a target subject; an image processor that converts the image data into a digital image form; and an eye detection component that evaluates the digital image form for the target subject and determines whether at least one eye of the target subject is closed.
摘要:
Pipes are provided wherein comprising polyamide compositions having good hydrolysis resistance and that may optionally contain plasticizer. Such pipes are suited for applications transporting hydrocarbons. The pipes of the present invention may be in the form of flexible pipes.
摘要:
Novel proppants useful in facilitating the hydraulic fracturing of subterranean formations are disclosed, made from filled polymers such as polyamides and polyesters. A process for the hydraulic fracturing of subterranean formations using filled polymeric proppants is disclosed.
摘要:
Polyamide compositions exhibiting superior hydrolysis resistance comprising copolyamide having a melting point that is less than or equal to about 240° C., at least about 30 μeq/g of amine ends, and an inherent viscosity of at least about 1.2.
摘要:
A process for preparing thermoplastic polyamide compositions that exhibit decreased melt flow and similar physical properties in comparison with conventional systems, in which polyamide is melt-blended with at least one organic acid, and, optionally, one or more additional components, such that the organic acid has a melting point that is no lower than about 10° C. less than the onset temperature of the melting point endotherm of the polyamide. The process results in decreased levels of corrosion and erosion of standard processing equipment in comparison with other processes for decreasing the melt flow while maintaining the physical properties of thermoplastic polyamide compositions. Articles of manufacture made according to the instant process and composition described therein are also disclosed.