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Plastics News correspondent Roger Renstrom reported these product introductions from Nepcon West, held Feb. 23-27 in Anaheim, Calif.

3M Co. introducing several adhesive films

3M Co. this spring plans to introduce a third Z-axis adhesive film, adding a product with both thermoplastic and thermoset characteristics.

The new product will allow Z-axis electrical interconnection of polyester flex circuits to each other or to rigid boards and exhibits the characteristics of both a thermoplastic and thermoset. This connection might be used in membrane switches.

Separately, 3M introduced a series of thermoplastic adhesive films and webs. Electronics applications include the sealing, bonding and protection of memory-card packages for personal computers, but also the thermo-bond films can help seal sewn tent seams against rain, attach a face plate to a guitar or bond plastic card laminations, according to Barry Kostyk, development manager for the adhesive systems market.

The St. Paul, Minn., firm markets tapes, adhesives and specialty products for printed circuit boards and electronic equipment.

Mold-release agent better for the ozone

Miller-Stephenson Chemical Co. Inc. is marketing a mold-release agent with no ozone-depleting chemicals, according to Judy Quinby, technical service specialist.

Miller-Stephenson in Danbury, Conn., sells the polytetrafluoroethlyene release agent 122V in 16-ounce spray cans for $15.45 each in cases of 12. The product contains DuPont Co.'s Vertrel hydrofluorocarbon fluid, which also is used as an industrial cleaning agent.

Quinby rates 122V a better product than the firm's 122DF release agent, a Class 2 ozone-depleter. In late 1996, Miller-Stephenson introduced the dry lubricant 122DF, which contains DuPont's Krytox DF and sells for $7.95 per can in cases of 12.

The PTFE in 122DF is identical chemically with DuPont's Vydax, now off the market. DuPont changed the way it made the product, now Krytox DF, to eliminate the use of a Class 1 ozone-depleting chemical in the manufacturing process.

Epoxies Etc. offers new PU elastomers

Epoxies Etc. introduced a family of two-component, room-temperature-curing polyurethane elastomers in December and is getting good feedback from existing customers, said President Michael Harrington.

The product maintains flexibility over time like silicone, but has better adhesion and is less-expensive, he said.

Epoxies Etc. employs 15 and occupies a 15,000-square-foot facility in Smithfield, R.I.