Materials...plastics Top Product* New family of resins Resins
Low density modeling board. This CNC-machinable board with a low density of 31 to 34 lbs./cu. ft. is for the production of temporary master models, styling models and prototypes, and visual models. The Ren Shape 440 board is formulated for machining at speeds of up to 1,800 in. per minute, using hardened steel cutters. It produces models with a Shore 58D hardness, good edge definition and a smooth surface finish. It has a glass transition temperature of 205°F and coefficient of thermal expansion of 35 x 10-6 in./in./°F. Measuring 60 in. long x 15.6 in. wide x 2- or 4-in. thick, it is bonded using Ren-Weld 103 epoxy adhesive or RP 6456 polyurethane. Ciba Specialty Chemicals, 4917 Dawn Ave, E Lansing, MI 48823. 517-324-1349. Circle 717.
Nanofiber plastics. Anti-static plastics are offered that are loaded with Graphite Fibril nanofibers, fibers that are just 0.01 µ in diameter. The uniform dispersion of these microfibers in molded parts eliminate ESD hotspots. The molding characteristics and physical properties of these resins are essentially the same as those of their unfilled neat counterparts. This translates into lower fill pressures, excellent flow length, isotropic shrinkage, reduced processing temperatures and stress free, non-warping parts. These properties simplify the material selection decision when developing ESD-sensitive versions of existing designs. Manufacturers can use existing molds, tooling and processing protocols to produce conductive parts suitable for cleanroom settings. Hyperion Catalysis International Inc, 38 Smith Pl, Cambridge, MA 02138. 617-354-9678. Circle 681.
Originally published in the November 1998 issue of designfax.
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Triax resins. In applications ranging from in-line skates,
industrial wheel hubs and auto roof racks to power tools and scuba gear, the Triax family
of resins provides features molders and OEMs will appreciate. Properties such as improved
impact and fatigue resistance and colorability make the resins popular in equipment
housings and fan parts subject to stresses caused by oscillation and vibration. The resins
also exhibit enhanced chemical and salt water resistance. Bayer Corp, 100 Bayer Rd,
Pittsburgh, PA 15205. 412-777-2000. Circle 714.
High-strain phenolic composites. This high-strain, MPC
moldable phenolic composite material is for molding components that must endure high heat
cycling and high stress, yet provide greater resistance to cracking than standard
reinforced phenolics. The glass-reinforced material is ideal for molding powertrain and
electric motor components, as they resist creep, maintain high strength and elastic
stiffness, and withstand high temperatures. Rogers Corp, One Technology Dr, PO Box
188, Rogers, CT 06263. 860-774-9605. Circle 716.
Silicone adhesive/sealant. MasterSil 705TC is a thermally
conductive, electrically insulative silicone adhesive. It is a 1-part system which
requires no mixing and is easy to apply. It cures readily when exposed to atmospheric
moisture and is a non-corrosive-type silicone. Suited for applications requiring
flexibility and high temperature resistance, it is also ideal for thermal conduction
applications where reworkability is a desirable feature. Master Bond, 154 Hobart
St, Hackensack, NJ 07601. 201-343-8983. Circle 718.
Laser-markable Celanex polyesters. Three new grades of
laser-markable Celanex thermoplastic polyester generate bold, permanent characters and
graphics without costly printing. The high resolution marking technology enables designers
to decorate / identify parts permanently and combines mechanical properties of
conventional Celanex polyesters with laser markability. They tolerate up to 25% regrind
without loss of mechanical properties or marking quality. Ticona, Hoechst Celanese,
90 Morris Ave, Summit, NJ 07901. 908-598-4000. Circle 722.
Lubricated cast nylon. NYLAWEAR lubricated cast nylon offers a
combination of properties that make it extremely effective in applications requiring wear
and bearing performance under aggressive temperature and load conditions. Featuring a low
coefficient of friction, excellent wear resistance, high limiting PV and low moisture
absorption, NYLAWEAR has been used in a diverse range of industries, from construction to
food processing. A.L. Hyde Co, 1 Main St, Grenlock, NJ 08032. 800-234-HYDE. Circle
720.
Weldable, formable Teflon PTFE. A family of chemically
modified PTFEs offers major improvements in performance and fabricating capabilities over
standard PTFE. Teflon NXT fluoropolymer resins can be welded and formed, and offer
opportunities for engineering products with higher permeation resistance, lower creep,
smoother surfaces and better high-voltage dielectric properties. DuPont Fluoroproducts,
Chestnut Run Plaza, Bldg 702, Rm 1254F, Wilmington, DE 19880. 302-479-7731. Circle 724.
UV cured silicones and urethanes. A high performance line of
UV cured silicones and urethanes ideal for rapid prototyping is available. The line
includes a clear CyClone UV Cured Silicone; a transparent CyClone RTV UV Transmitting
Silicone; CyClone UV Urethane Clear; and CyClone UV Urethane White. A CyClone Release
Agent is also available. CyClone UV Silicone is a clear, 1-component silicone that cures
to a depth of 4.5 in. in 5 to 15 minutes. Zysus, 2790 Skypark Dr, Torrance, CA
90505. 888-760-1100. Circle 712.
