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Etching process makes plastic stick to metal.


A new approach to "outsert An outsert is a four page card wrapped around and attached to the outside of a magazine or other publication. Its purpose is to advertise a product (such as a subscription and/or free gift) and also to act as a flag for the publication to distinguish it from other titles on " molding treats a piece of metal so that resin can be molded directly onto it and adhere strongly to one surface without requiring either holes punched in the metal or encapsulation by the plastic. The process, called Nano-Molding Technology (NMT (Nordic Mobile Telephone) An analog cellular phone system deployed in more than 40 countries in Europe. Launched in the Scandinavian countries in 1979, NMT was the first analog cellphone system. Both 450 MHz and 900 MHz versions are available. See cellular generations. ), was developed by Taiseiplas Co., Ltd. in Tokyo, Japan, and is available for license. The company also uses the process itself to mold custom parts, says Kogoro Osumi, director.

NMT at present works only with aluminum and resins that contain ester linkages, such as PBT PBT Provider Backbone Transport (networking technology adding determinism to ethernet)
PBT Polybutylene Terephthalate
PBT Profit Before Tax
PBT Paper Based Test (education) 
 and PPS (Packets Per Second) The measurement of activity in a local area network (LAN). In LANs such as Ethernet, Token Ring and FDDI, as well as the Internet, data is broken up and transmitted in packets (frames), each with a source and destination address. . These resins also must be compounded with 20% to 40% glass or carbon fibers in order to match the linear expansion coefficient of the aluminum.

For NMT, aluminum sheet is dipped into an alkaline solution and then into an acid solution to remove oxides and grease from the surface. The aluminum is then dipped into a proprietary amine amine (əmēn`, ăm`ēn): see under amino group.
amine

Any of a class of nitrogen-containing organic compounds derived, either in principle or in practice, from ammonia (NH3).
 solution, which etches microscopic holes 20 to 30 nanometers deep and wide. A coating of the amine remains on the aluminum surface and forms an exothermic exothermic /exo·ther·mic/ (-ther´mik) marked or accompanied by evolution of heat; liberating heat or energy.

ex·o·ther·mic or ex·o·ther·mal
adj.
1.
 reaction with the resin, generating heat to keep the resin sufficiently fluid to enter the tiny holes, which would not otherwise occur. A strong mechanical bond forms when the melt cools. Taiseiplas guarantees a tensile tear strength of 200 to 300 kgf/[cm.sup.2] and a pull-off breaking strength of 90 to 100 kgf/[cm.sup.2]. Tests show the resin fails before the metal/plastic bond does.

NMT is being used commercially to produce remote-control units for Sony. Other initial targets are electronic and automotive applications such as notebook computer housings, automotive electronic controls, and auto interior parts. Tel: +81 3 3243 1851 * www.taiseiplas.com
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Title Annotation:Injection Molding
Publication:Plastics Technology
Date:Mar 1, 2005
Words:284
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