Materials: FILMS & COATINGS

Potting compounds and encapsulants

• Superior flexibility
• Environmentalresistance

Black potting compound (inside)
seals the connector

This full range of epoxy and urethane potting compounds and encapsulants are available in low-shrink and non-shrink formulations. They cure quickly at room temperature with minimal air entrapment, and are ideal for protecting electronics, wiring and other components subject to damage from moisture, temperature extremes or cycling, or shock and vibration. Specifically, Flexane compounds are castable, non-shrinking, 2-component liquid urethanes that are easily mixed and poured, and cure at room temperature. Syon epoxy compounds include both black and clear encapsulants; electrically and thermally conductive potting compounds; and high-density, high-temperature potting compounds. Devcon, Danvers, MA. Free info--Circle 546. Go direct to spec at: http://www.OneRS.net/107df-546

Packaging films. This company introduces the first four grades of its Inflex linear low density polyethylene packaging film line, which uses Topas cyclic olefin copolymer from Ticona to improve stiffnesss, clarity, sealing behavior and slip. The four sealant-layer blends have been shown to raise line speeds, reduce rejects and allow for thinner sealant layers. New England Extrusions, Turners Falls, MA. Free info--Circle 554. http://www.OneRS.net/107df-554

Epoxy film adhesive. PF4010 can bond materials with different coefficients of thermal expansion, as it is able to withstand the stresses generated when these materials are subject to heat. Adhesive allows tough, thermal management. National Starch & Chemical Co, Bridgewater, NJ. Free info--Circle 547. http://www.OneRS.net/107df-547

Crosslinked polyethylene film. This low-cost alternative for high temperature applications such as labels, tapes and cable wrap has a softening point of 350°, which allows it to be used for higher temperature applications than conventional polyethylene film. Metallized Products, Inc, Winchester, MA. Free info--Circle 551. http://www.OneRS.net/107df-551

Water reducible enamel. KEM AQUA 400 is a high quality, air dry water reducible alkyd enamel ideal for the off-road equipment and general metal markets. Its attributes include sharp high gloss, excellent corrosion resistance, adhesion and flexibility, as well as very good color and gloss retention. It dries overnight to a hard, durable finish that provides one coat corrosion protection and resistance to diesel fuel and motor oil. Sherwin-Williams, Cleveland, OH. Free info--Circle 552. http://www.OneRS.net/107df-552

Permanent static dissipative coating. Licron adheres well to metal, plastics, paints and most other surfaces. It operates from 0 to 100% humidity. Cured coating is durable and will not chip. The material can be used on any surface needing a translucent coating. Techspray, Amarillo, TX. Free info--Circle 553. http://www.OneRS.net/107df-553

Flame-retardant film. This film is for use in fire safety engineering of flexible duct work in HVAC systems. Manufactured by computer controlled blending and extrusion of premium resins and real-time burn testing to meet UL 181 and FMVSS 302 specifications. FlameX, Wilmington, CT. Free info--Circle 558. http://www.OneRS.net/107df-558

Single faced, optically clear film. ARclear now includes DEV-8796 and DEV-8893 in its line of optically clear adhesives and films for the display screen industry. The former is a 3.0-mil optical grade polyester film coated on one side with an optically clear adhesive; the latter is a 7.0-mil optical grade, hard-coated film with an optically clear adhesive. Adhesives Research, Inc, Glen Rock, PA. Free info--Circle 556. http://www.OneRS.net/107df-556

Silver-filled silicone coating. For use in a variety of shielding and gasket applications, ElectroCoat combines the low compression of fabric-over-foam with the environmental sealing of conductive elastomer gaskets to provide 90+ dB EMI shielding. Laird Technologies, Delaware Water Gap, PA. Free info--Circle 548. http://www.OneRS.net/107df-548

Coatings selector guide. This guide describes a line of solvent-free, light curing conformal coatings and encapsulants. The fast-curing materials incorporate a number of features never before available in light curing coatings. Listed characteristics include viscosity, durometer, elongation at break, modulus of elasticity, dielectric strength, volume resistivity, surface resistivity and the features and benefits of each. Dymax Corp, Torrington, CT. Free info--Circle 549. http://www.OneRS.net/107df-549

Rooftop Cable Coating

• restores integrity of aging cable
• extends operating life

A major Midwestern auto manufacturer estimates that it has saved $850,000 through the use of a silicone sealant to re-coat failing PVC-jacketed electrical cable, preventing the need to replace approximately 15,000 linear feet of the company's medium-voltage wiring at its facility.

700 Industrial Grade Silicone Sealant is a caulking material that was used to coat directly over the dry, cracking PC cable jacketing. The result was renewed cable life and protection that is expected to last 20 years or more, at a fraction of the cost to replace the old cable.

Applied directly over the old PVC coating, the 1-part sealant cures on exposure to water vapor in the air. The material forms a tack-free skin within 15 minutes at 77°F and 50% relative humidity. The fully cured sealant exhibits good resistance to weathering and extreme temperatures, retaining its elastomeric properties over a temperature range from -76° to 350°F in continuous use, and up to 400°F for intermittent use. Unlike most organic sealants and cable coatings, the silicone formulation exhibits excellent resistance to the environmental stresses which break down polymers such as PVC. Silicone sealants are not significantly affected by UV radiation, ozone, rain, snow or extreme temperatures. They maintain flexibility, allowing them to withstand thermal cycling over their typical outdoor lifespan of more than 20 years.

The versatile sealant has many applications, and is recognized under UL QMFZ2, as well as the National Sanitation Foundation List 51 for direct food contact applications, as well as incidental food contact. It is not intended for medical or underwater applications. The sealant is available in a variety of colors, and is supplied in 3-oz. tubes, 10.3-oz. cartridges, 4.5-gal. pails and 52-gal. drums.

For more information:

Dow Corning, Midland MI. Free info--Circle 557. http://www.OneRS.net/107df-557