2000 New Product Bonanza

Adhesive

Designed to protect heat sensors in corrosive environments, Resbond(TM)989 3,000F alumina adhesive provides high bond strength and electrical, chemical, solvent, and moisture resistance. The one-component material cures at room temperature and adheres to metals, ceramics, graphite, and glass.

Cotronics Corp., 3379 Shore Pkwy., Brooklyn, NY 11235; FAX (718) 646-3028; www.cotronics.com.

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Adhesives

ABLEBOND 2000 series electrically conductive, die-attach adhesives provide lead-less assembly for plastic ball grid array (PBGA) packages and matrix-style BGA designs. The materials are formatted to withstand high-temperature reflow and provide low modulus, moisture absorption, and low bleed on solder mask surfaces. The adhesive suits die sizes from 150x150 to 1,000x1,000 mil.

Ablestik, 20021 Susana Rd., Rancho Dominguez, CA 90221; FAX (310) 764-2545; www.ablestik.com.

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Coating

Abrasion-resistant resin 9-984-B conformal coating is reported to hide portions of a pc board, components, and circuitry. Precision dispensing systems optimize coating placement. Exposure to longwave UV and visible light cures the coating in seconds, but the material can also cure via heat treatment.

Dymax Corp., 51 Greenwoods Rd., Torrington, CT 06790; FAX (860) 496-0608; www.dymax.com.

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Tube gaskets

These high-performance EPDM RFI Tube Gaskets combine the properties of EPDM in demanding silicone rubber applications and the Ultra-Vanshield coextruded conductive RFI shielding gasket process for higher performance levels. The core is covered with a conductive outer jacket for special abrasion-resistance. Standard tubing and custom profiles are available. Meets NBC specifications.

Vanguard Products Corp., 87 Newtown Rd., Danbury, CT 06810; FAX (203) 798-2351; www.vanguardproducts.com.

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Polymer

A 30% glass fiber-reinforced polypropylene homopolymer, Latene AG3 H2W G/30 VO is stabilized for contact with copper, making it suitable for such electrical applications as connector bodies and switch cases. Features include: ignition resistance, electrical resistivity, high tensile and flex strength, and ability to take color. The material can be processed at medium injection speeds and moderate cylinder and mold temperatures.

Lati USA, 1470 Ben Sawyer Blvd., Mt. Pleasant, SC 29464; www.lati.com.

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Adhesive

An anaerobic, one-part adhesive for standard fiber-optic connectors cures in 3 to 5 minutes without fiber lockup. The material works with any ceramic ferrule connector for fast termination, low loss, and high reliability. It is available alone or in kits of 100 SC or ST connectors.

Fotec, 151 Mystic Ave., Medford, MA 02155-4615; FAX (781) 396-6395; www.fotec.com.

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Silicone materials

Designers can use BISCO(TM)cellular silicone sheet materials as environmental seals, gaskets, and seals for heat sinks and fan motors in wireless communication base-station enclosures. The materials provide vibration isolation and cushioning between electronic components; withstand heat, cold, and moisture; and carry the UL94 V-O rating. Operational range is -67 to +400F; the silicones retain 99% of their original thickness when tested per ASTM D-1056 at 158F.

Rogers Corp.; FAX (847) 640-3838; www.rogers-corp.com.

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Tubing

Tygon(R)Fungus-Resistant Tubing, formulation B-44-3-BFR is formulated to offer chemical resistance where moist, humid conditions exist. Additionally the tubing should prevent clogs because its transparency offers easy flow monitoring. Company tests showed that the tubing produced no spore growth after 90 days of continuous cycles. Resistances include fungi such as Aspergillus niger, Penicillium citrinum, Streptomyces rubrireticuli, and Aspergillus flavus.

Saint-Gobain Performance Plastics, 150 Dey Rd., Wayne, NJ 07470-4699; FAX (973) 696-4056; www.tygon.com.

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Connector alloys

These stainless-steel and nickel alloy strips are available in the precise gauges required for electronic connectors. Gauges range from 0.0008 to 0.125 inch, and users can specify that the metals be rolled and tempered to specific hardness values. Widths range from 0.070 to 14 inches; the strips are burr-free and within close tolerances.

Ulbrich Stainless Steels & Special Metals, 57 Dodge Ave., North Haven, CT 06473-1191; FAX (203) 239-7479; www.ulbrich.com.

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Alloy

Project 7000(R)15Cr-5Ni stainless has been developed through vacuum melting and chemi-cal balancing to provide a more machinable alloy. The material is reported to offer increased capacity and longer tool life, and is available as a drop-in replacement for conventional stainless. The company reports increased productivity by up to 145% using the material in their test parts.

Carpenter Technology Corp., Box 14662, Reading, PA 19612-4662; FAX (610) 208-2776; www.cartech.com.

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EMI gaskets

These four material variations are part of the SOFT-SHIELD(R)4000 Series EMI gasket line. The materials are reported to make low-cost, low closure force EMI gaskets that provide high levels of shielding and grounding. Each rectangular profile features a PORON(R)open cell urethane foam core that is individually wrapped with aluminum foil fabric. The reinforced foil fabric covering is designed to have no loose conductive fibers or sharp edges. They are available with or without an electrically conductive, pressure-sensitive adhesive on one side.

Chomerics, Division of Parker Hannifin, 77 Dragon Ct., Woburn, MA 01888; FAX (781) 933-4318; www.chomerics.com.

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Compression limiters

Standard imperial and metric compression limiters protect an assembly's plastic components from the compressive loads generated by the tightening of bolts. Made of roll-formed steel and available in customer-specific lengths, the limiters have diameters of 1/4, 5/16, and 3/8 inch as well as M6, M8, and M10. Series CL250 limiters are compatible with heat-treat-grade bolts; series CL200 are for non-heat-treat-grade bolts.

Spirol Int'l. Corp., 30 Rock Ave., Danielson, CT 06239-1434; FAX (860) 774-0487; www.spirol.com.

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Urethane foam

This 12-mil version of the company's PORON(R)urethane foam is specifically formulated for gaskets and pads in small, portable electronic devices. It is reported to exhibit improved energy absorption and dimensional stability during processing. The thin cast consists of 0.010 inch (0.25 mm) urethane supported by a 0.002 inch (0.05 mm) polyester film. Since it is cast to the dimension rather than thinned down by grinding, the product is said to offer an attractive finish on both sides.

Rogers Corp., One Technology Dr., Rogers, CT 06263-0188; FAX (860) 779-5509; www.rogers-corp.com.

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Tubing

A proprietary combination of silicone elastomers is reported to give Versilic(TM)High Strength Pressure Tubing, Formulation SPX-70 I.B., optimal tensile strength, elongation, and compression set. A smooth inner surface is intended to reduce the risk of particulate entrapment and microscopic buildup during fluid transfer. The tubing resists temperatures from -112 to 320F, is taste and odor free, and withstands repeated CIP and SIP cleaning and sterilization.

Saint-Gobain Performance Plastics, 150 Dey Rd., Wayne, NJ 07470-4699; FAX (973) 696-4056; www.tygon.com.

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Coating

TUFRAM 2000(TM)coating for aluminum and aluminum alloy parts can be applied in thicknesses of 0.0005 to 0.0007 inch with buildup of 0.00025 to 0.00035 inch. Properties include: corrosion resistance, wear resistance, a dielectric of 2.1 at -250F to +550F and 5 Hz to 10,000 MHz, and a constant dissipation factor of 0.0003 at the same temperature range. Both sealed and unsealed versions are available.

General Magnaplate Corp., 1331 U.S. Rte. 1, Linden, NJ 07036; FAX 908-862-6110; www.magnaplate.com.

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Polymers

By incorporating spherical, high-molecular-weight polymer beads with different refractive indices into the acrylic matrix, ACRYLITE df acrylic polymers can change the direction of light travel within a manufactured part. The light-diffusing molding and extrusion compounds transmit light while scattering it, withstand outdoor exposure, and can be injection molded or extruded into sheets and thermoformed using conventional plastic processing equipment.

Cyro Industries, 100 Enterprise Dr., Rockaway, NJ 07866-5055; FAX (973) 442-6117; www.cyro.com.

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Vacuum lubricants

NyeTorr(R)lubricating oils and gels for high-vacuum, clean-room environments contain fractionated raw materials with a narrow molecular-weight range. The elimination of light-molecular-weight fractions should reduce trace outgassing, which is a source of contamination for semiconductor wafers and nearby instruments. The company measures each lot's vapor pressure and attaches a report to each container of lubricant.

Nye Lubricants, 12 Howland St., Fairhaven, MA 02719; FAX (508) 997-5285; www.nyelubricants.com.

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Silicone compound

Silastic(R)9280-70 Liquid Silicone Rubber (LSR) cures to form a 70-durometer elastomer in about five minutes at 150C. As molded, the reformulated compound has reportedly demonstrated improvement in compression set resistance of approximately 35% over the previous formulation, with roughly a 16% gain in elongation. Tensile strength and heat aging tests were also reported to have positive results. Possible applications include automotive grommets and valves, and appliances.

Dow Corning, Box 994, Midland, MI 48686-0994; FAX (517) 496-8026; www. dowcorning.com.

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TPE compounds

These thermoplastic elastomer (TPE) compounds are formulated for multishot and overmolding applications. DYNAFLEX(R)TPE compounds have been reported to bond well with polypropylene substrates, while VERSAFLEX(TM)TPE alloys are recommended for overmolding onto polycarbonate, ABS, nylon, polypropylene, copolyester, and propionate materials. Applications include any requiring a soft touch, tactile feel, or grip.

GLS Corp., 833 Ridgeview Dr., McHenry, IL 60050-7050; FAX (815) 385-8533; www. glscorporation.com.

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Gasket

The 2000 series gasket consists of conductive fabric over foam and has been designed for commercial EMI shielding application demands. The foam core is flexible and conformable, making it recommendable for applications requiring low closure force and minimal compression set. Applications include places where weight and space are limited: electronic cabinets/enclosures, laptop computers, cellular devices, and portable electronic devices. Shielding effectiveness in excess of 100 dB is also reported.

Tecknit, 129 Dermody St., Cranford, NJ 07016; FAX (908) 272-2741; www.tecknit.com.

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