Asymtek's Jet Dispensing Precisely and Accurately Dispenses Catalyst Ink on Fuel Cell Membranes.Highly Selective Jet Eliminates Need for Masking CARLSBAD, Calif. -- Asymtek, leader in dispensing technology and pioneer in jetting technology, introduces two coating/dispensing technologies for applying catalyst inks onto membranes in electrode assemblies of proton exchange and direct methanol fuel cells Direct-methanol fuel cells or DMFCs are a subcategory of proton-exchange fuel cells where, the fuel, methanol (CH3OH), is not reformed, but fed directly to the fuel cell. . Pulse spray coating technology provides quick large area coverage, allowing for uniform film thicknesses. DispenseJet technology deposits the ink with a uniform thickness and density so lines and patterns are smooth, even, and the same consistency throughout. The consistent and precision application of the ink increases the porosity of the film so fuel and byproducts can pass through the membrane efficiently. Asymtek offers fuel cell manufacturers two types of application technologies for increased dispensing flexibility: spray coating and discrete dot dispensing. Spray coating is for large areas, for controlled thicknesses, and even film thicknesses. Discrete dot dispensing is used for specific patterns with high edge definition and exact film build up of highly volatile inks. Asymtek has a multiple array of coating and dispensing technologies for catalyst inks, polymer electrolytes, gasketing, and sealing depending on the application. Catalyst inks are very expensive because of the platinum content. With the Asymtek jet, the ink is deposited precisely where it is programmed to be placed, so there is limited waste. The jet deposits discrete dots in whatever pattern is desired without masking. Asymtek's closed-loop system Noun 1. closed-loop system - a control system with a feedback loop that is active closed loop control system - a system for controlling the operation of another system measures the exact amount of fluid that's deposited. Process controls and Asymtek's Easy Coat(R) for Windows XP The previous client version of Windows. XP was a major upgrade to the client version of Windows 2000 with numerous changes to the user interface. XP improved support for gaming, digital photography, instant messaging, wireless networking and sharing connections to the Internet. (R) (ECXP) software regulate the volume, size, shape, and viscosity of the dot. Selective spray coating is a highly selective method of jetting materials and enables fluid to reach locations not possible with other applicators. Dot sizes to 1.2mm (0.05 in.) are possible as well as thinner film builds of 5um. Jetting is fast, up to 500mm/sec (20 in/sec), because there is no Z-axis motion. The system is so accurate that it eliminates the need for masking. The system is easy to disassemble dis·as·sem·ble v. dis·as·sem·bled, dis·as·sem·bling, dis·as·sem·bles v.tr. To take apart: disassemble a toaster. v.intr. 1. and maintain. Discrete jet dispensing allows material application in tight spaces as small as 175 microns with final dot diameters as small as 200 microns. Shot volumes of 1.0 nanoliter are possible and the jet stream size can be as small as 50 microns. Fluids from 1 to 250,000 mPa (cps) can be jetted. As with coating, this is a very fast system. The system jets "on the fly" with no stopping between dots required at a rate of 200 dots per second. "The success of the catalyst ink depends 50% on its chemistry and 50% on its application," said Jim Klocke, Asymtek senior business development manager. "While most application methods use spray technology, the catalyst inks may vary in thickness and density. With Asymtek's jet dispensing, all those problems are eliminated and the ink is deposited precisely, with uniform thickness and density." Fuel Cell Photo: http://www.asymtek.com/images/hires/fuel_cell.jpg Photo caption: Asymtek's DispenseJet[R] DJ-9000 is ideal for precise dispensing of dots of a wide range of fluids, including conductive conductive having the quality of readily conducting electric current. conductive flooring flooring or floor covering made specially conductive to electrical current, usually by the inclusion of copper wiring that is earthed adhesives like the silver epoxy epoxy Any of a class of thermosetting polymers, polyethers built up from monomers with an ether group that takes the form of a three-membered epoxide ring. The familiar two-part epoxy adhesives consist of a resin with epoxide rings at the ends of its molecules and a curing shown here. About Asymtek Asymtek([R]), a world leader in automated fluid dispensing and pioneer of jetting technology, designs and manufactures a full line of dispensing and conformal coating Conformal coating material is applied to electronic circuitry to act as protection against moisture, dust, chemicals, and temperature extremes that if uncoated (non-protected) could result in a complete failure of the electronic system. systems for semiconductor package and printed circuit board assembly as well as automotive, medical, aerospace, disk drive, flat panel display A thin display screen for computer and TV usage. The first flat panels appeared on laptop computers in the mid-1980s, and the LCD technology became the standard. Stand-alone LCD screens became available for desktop computers in the mid-1990s and exceeded sales of CRTs for the first time , optoelectronic, appliance and other precision industrial manufacturing applications. Asymtek products deliver a wide variety of fluids, including glues, epoxies This article is about the band named the Epoxies. For the adhesive, see Epoxy. The Epoxies are an American band from Portland, Oregon formed in 2000. Heavily influenced by punk rock and New Wave the band has described themselves as robot garage rock. , solder pastes, coatings and gasketing materials. Founded in 1983 and acquired as a subsidiary of Nordson Corporation (Nasdaq:NDSN NDSN National Drug Strategy Network ) in August 1996, Asymtek is an ISO (1) See ISO speed. (2) (International Organization for Standardization, Geneva, Switzerland, www.iso.ch) An organization that sets international standards, founded in 1946. The U.S. member body is ANSI. 9001:2000 certified company. Asymtek has received numerous awards including Intel's prestigious Supplier Continuous Quality Improvement award for four years in a row: 2003, 2004, 2005 and 2006. For more information, visit www.asymtek.com. |
|
||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion