Bayer, Hennecke unit debut PU products
Bayer Corp. has introduced several new polyurethane technologies.
The Pittsburgh-based firm's new Multranol 8224 polyol yields PU elastomers with five to ten times lower water absorption than conventional polyether-based PU. It also provides high resistance to chlorinated water and hydrolysis at high temperatures and humidity. Projected applications include electrical encapsulants, cable splicing and swimming-pool filter caps.
Bayer's Hennecke Machinery unit unveiled two PU processes.
Hennecke's NovaForm technology uses carbon dioxide as a blowing agent. The foam froths at the mix head, allowing large and complex parts where small pinholes are not a quality problem. It is especially useful for foam-in-cover uses.
VakuForm, based on foaming under vacuum conditions, can reduce foam density 10-20 percent by controlling the amount of vacuum in the cavity.
The mold is closed after the PU is poured in, and then a vacuum is created in the cavity. The process reduces the mold's internal pressure and allows foam to rise more freely. It works especially well for molded parts that require high flexibility.
Tel. (800) 622-6004 or (412) 777-2000, fax (412) 777-4889.
New type of welder available in U.S.
Hamburg, Germany-based Hermann Luhr GmbH has created a new type of welding machine, designed for plastic car parts, that combines edge folding and ultrasonic welding.
One application makes ABS dashboard covers. First, a molded cover with the cloth bonded to its surface is laid into a cutting device. After cutting, the product automatically moves to the welding machine, which folds the cloth and secures it by ultrasonic welding. Finished dashboard covers move to a conveyor.
Luhr's exclusive North American agent is Austrotech Corp. in West Bloomfield, Mich.
Tel. (248) 738-1677, fax (248) 738-1699.
BASF rolls out line of high-weight PS
BASF Corp. offers a high-molecular-weight, general-purpose polystyrene with improved toughness.
The Mount Olive, N.J., firm said its 166H has high clarity, tensile stress at break of 6,000 pounds per square inch and tensile modulus of 350,000 psi. The material is suited for blending with high-impact PS and clear styrene butadiene stryrene block copolymers. It can be processed by injection and blow molding and extrusion for applications like thin-walled tumblers, compact-disc jewel boxes and oriented PS packaging.
Tel. (800) 426-3675 or (973) 426-3970, fax (973) 426-3972.
Tampoprint offering ink-cup pad printer
Tampoprint International Corp.'s Hermetic 9-11 sealed ink-cup pad printer offers more flexible control and other improvements over the Hermetic 90.
Pressure on the ink/doctoring cup can be changed by turning a knob on the panel and adjusting it for different materials. Tampoprint of Vero Beach, Fla., also has integrated the ink-residue pickup system into the machine housing. The 9-11 can print on products bigger than the Hermetic 90.
Tel. (561) 778-8896, fax (561) 778-8289.
Coding Products of Kalkaska, Mich., is selling SafeMark hot-stamp printing ribbons for printing on new nonvinyl packaging materials such as nylon and thermoplastic elastomers. The ribbons use no solvents and have been approved for Class VI medical products. Tel. (616) 258-5521, fax (616) 258-6120. ... D-M-E Co. of Madison Heights, Mich., and Pleasant Precision Inc. of Kenton, Ohio, have modified their North American distribution agreement for Pleasant's Round Mate interchangeable insert mold system. Pleasant will sell Round Mate direct in North America, while the two firms will continue to sell the product jointly in some foreign countries. Tel. (419) 675-0556, fax (419) 675-3283. ... Crosshead tooling maker Genca Corp. of Clearwater, Fla., has introduced in-line heads and dies for extruding tubing, profiles and polyethylene pipes. Tel. (813) 524-3522, fax (813) 531-5700. ... Ventax Robot Inc. of Ayr, Ontario, introduced an SP3 sprue- picker robot, which it claims is more compact, lighter and easier to service than earlier Ventax robots. It boasts a compact valve system, improved cable routing and upgraded air cylinders. Tel. (519) 632-7834, fax (519) 632-7702.