Plastics, metals, & other materials 11254

DN Staff

December 4, 1995

4 Min Read
Plastics, metals, & other materials

Material fabricates like glass epoxy, performs like PTFE

Use of RO4003(TM) circuit-board material allows the design and fabrication of advanced, high-frequency circuits without the expense and difficulty of working with a soft PTFE-based laminate. The rigid material, which is based on a ceramic-filled thermostat dielectric, can be fabricated by nearly any board shop using close to standard material fabrication processes for epoxy glass boards. RO4003 offers a K of 3.38; a dissipation factor of 0.0022 at 10 Ghz; and a thermal coefficient of expansion, in the Z axis, of less than 35 ppm.
Rogers Corp. , Microwave and Circuit Materials Div., 100 S. Roosevelt Ave., Chandler, AZ 85226, FAX (602) 961-4533

Process bonds PTFE to polymers

The M-Bond(TM) process for bonding PTFE to a variety of polar polymers is safe, non-polluting, highly controllable, and relatively easy to apply. The results are highly bondable PTFE tubing and PTFE insulated wire which provide uni-bond constructions with a wide variety of jacketing materials, including plastics such as nylons, PBT, PVC, and polypropylene. The M-Bond process also renders PTFE bondable to synthetic rubbers and elastomers.
Markel Corp., Box 752, Norristown, PA 19404

Alloy exhibits high magnetic saturation

Hiperco(R) Alloy 50-HS is an iron-cobalt-vanadium, soft, magnetic alloy which, in the annealed condition, has a combination of high-yield strength and good magnetic and electrical properties. The alloy can be used for rotor laminations in a wide range of conventional power generation and magnetic bearing applications where rotational speeds are exceedingly high. When annealed at 720 to 740C for about two hours, the alloy provides a room-temperature strength of 620 MPa.
Carpenter Technology Corp., Box 14662, Reading, PA 19612 FAX (610) 208-2858

Laminate offers releasable dielectric layer

EMI shielding laminate consists of an aluminum foil and a dialectric layer bonded together with a conductive, pressure-sensitive adhesive (PSA). Sections of the dielectric layer can be selectively removed to expose PSA and foil, providing choices for grounding and bonding sites. The laminate is a low-cost alternative to conductive paints, metalization, and plating of plastic enclosures. The metal foil layer provides 20-60 dB of shielding--depending on frequency, size, configuration, and installation--and grounding properties. The dielectric layer provides isolation and flexibility.
Parker Hannafin Corp., Chomerics Div., 77 Dragon Ct., Woburn, MA 01888, FAX (617) 933-4318

Resin offers enhanced flow

BK10 grade of K-Resin(R) styrene-butadiene (SB) copolymer has a nominal flow rate of 15.0 grams using traditional ASTM condition G. The resin has enhanced flow capability, excellent clarity, toughness, high surface gloss, and stiffness. Primary applications for the resin include injection molding containers, bottles, medical devices, and toys.
Phillips Chemical Co., 2625 Bay Area Blvd., Houston, TX 77058

Lubricant reaches inaccessible places

Penephite is a combination lubricant containing oils, solvents, and micron-sized graphite in colloidal suspension. The lubricant adheres to metal and penetrates into small, inaccessible spaces. Penephite can loosen and supply long-lasting dry lubrication to leaf springs, slides, locks, and hinges. It also protects against rust.
Kano Laboratories Inc., 1000 S. Thompson La., Nashville, TN 37211 FAX (615) 833-5790

Nylon eliminates processing problems

Kopa(R) KN3322 V-0, non-halogenated, flame-retardant nylon 66 possesses high heat-distortion temperature and high tensile and flex strength. It is easily processed on conventional machinery without "plate out" problems commonly associated with flame-retardant nylons. The nylon also provides a lower coefficient of linear thermal expansion, and a melting point up to 50F higher than many other FR nylons. It also has a relatively low specific gravity of 1.16. The material is for use in heat applications such as those in the electronics industry.
Advanced Web Products Inc., 17 Fox Run, Cranston, RI 02921, FAX (401) 943-2757

Honorable Mention

Coating provides grease-free lubrication

Molykote D 31 AF coating exhibits a coefficient of friction of m=0.05. In applications which do not permit running-in with greater loads, a low coefficient of friction is achieved from commissioning onwards. The coating can be applied as thin films; and dry, clean lubrication is ensured in the oil droplets in the base material. In a salt-spray test, values in accordance with DIN 50021 from 300 to 500 hours were achieved. Molykote D 31 AF has a temperature range from -50 to 180C, and is free from heavy metals, sulfur, and chlorine.
Dow Corning Corp. , Mail #CO2310, Midland, MI 48686

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