Compounds target laser-marking uses
Plastics Group of America has developed resin compounds aimed at laser-marking applications.
Polifil LM products include compounds based on polypropylene, polyethylene and polystyrene resins as well as versions containing fillers and reinforcements. A computer-controlled laser beam directed at a part made from the materials will label or decorate the part surface.
The Woonsocket, R.I., firm said laser marking offers advantages over conventional printing. Changeover is rapid because it is software-driven and tools aren't changed. No printing tool touches the molded part, so deformation is avoided. Flexibility of the process makes it especially well-suited for high-mix, low-volume production such as prototypes.
Tel. (800) 984-4874 or (401) 767-2700, fax (401) 767-2823, e-mail [email protected]
Impact-modified PC can withstand cold
Polymer Resources Ltd. has developed an impact-modified polycarbonate suitable for low-temperature applications.
PRL PC-IM resists breakage in outdoor uses such as signs and sports equipment. It is available in four grades, from a low-melt-flow-index material for extrusion and injection molding to an easy-flow grade for thin-wall injection molding.
The Farmington, Conn., firm said general-purpose PC grades have similar properties at room temperature, but at temperatures down to minus 40° F, the impact-modified resins have superior impact resistance, from 10 foot-pounds an inch and higher.
Tel. (860) 678-9088, fax (860) 678-9299, e-mail [email protected] resources.com.
Clariant introduces Soft-Touch effects
Clariant Masterbatches has debuted its Enigma special effects.
Soft-Touch materials provide a soft matte finish for injection molding that mimics similar effects first achieved for blow molded parts. The system is based on a soft-textured resin combined with a masterbatch colorant. The product line includes a soft-satin effect that produces a shimmer with minimal flow lines, the company said.
Clariant has new thermochromic additives that allow a blow molded bottle to change color when exposed to heat or cold. The temperature conditions and color shifts range in intensity based on how the material system is designed. Using such systems in multilayer bottles dramatically extends the color effects possible. The effects work best in polypropylene and high density polyethylene.
Spectrachrome provides color changes when the angle of viewing changes. It works on the basis of light refraction interacting with colors in the resin. Materials such as glass, liquid crystals and silica in the surface of a container provide refraction to change apparent color. Multilayer containers provide the most-dramatic effects.
Tel. (401) 438-4080, fax (401) 438-4680, e-mail [email protected] clariant.com.
DuPont, Kolorfusion study dye sublimation
DuPont Engineering Polymers has formed an alliance to expand uses of dye-sublimation printing on molded products.
The company has teamed up with Kolorfusion International Inc. of Denver, a developer of patented technology to decorate three-dimensional objects in multiple colors. DuPont of Wilmington, Del., produces resins suited to the process, including polyesters, acetal and nylons.
Potential uses of the dye process span sporting goods, appliances and other products where a permanent, wear-resistant, multicolor image sets the product apart. It provides a full spectrum of ultraviolet-light-resistant colors for plastics, metals and glass.
Tel. (800) 441-0575, fax (302) 999-4358, e-mail [email protected] .com.
PET fabric designed for injection molding
Polymer Group Inc. has developed a PET fabric for injection molding.
The North Charleston, S.C., firm said the fabric can be used as a backing material for applications such as automotive interior trim. It is easier to work with than needle-punch fabrics and less expensive to ship, the firm claims.
The fabric is made by a spun-lace process that maintains elongation in both the machine and cross directions. The fabric easily conforms to the shape of the mold while providing structural integrity and barrier properties, and offers enhanced acoustical performance, Polymer Group said.
Tel. (800) 631-5594, fax (919) 207-3140, e-mail [email protected] .com.
New PP compound won't absorb water
NPI Plastic has debuted an inherently static-dissipative polypropylene compound for injection molding applications.
Nexstat 10C896 boasts tunable, consistent surface resistivity of 1 million to 1 billion ohms per square, said Brampton, Ontario-based NPI. The product is nonhygroscopic, so no drying is required, and it has low ionic contamination, the firm said. Potential uses include storage bins, tote boxes, guide rails and racks.
Tel. (905) 454-2666, fax (905) 454-2668, e-mail [email protected]