Eastman LLDPE film improves strength
Eastman Chemical Co. developed a new linear low density polyethylene for film packaging.
Tenite Hifor Clear has a better combination of clarity and strength vs. LDPE and compares well with other high-performance LLDPEs, the Kingsport, Tenn., firm claims. The new resin has 4.2 percent haze, 375 grams of machine-direction tear strength and seal initiation temperature of 208° F. Its specific gravity is 0.917 and melt index is 0.85 grams per 10 minutes.
Tel. (423) 229-8148, fax (423) 224-7244, e-mail [email protected] man.com.
Teknor adds 18 colors to concentrates line
Teknor Color Co. expanded colors available in its rotational molding concentrates.
The Pawtucket, R.I., firm added 18 colors, most of which are heavy metal-free. Teknor said it also improved efficiency of heavy metal-free color concentrates. Typical usage levels of 0.125-0.25 percent are less than half the levels some suppliers recommend, it claimed. New colors include lemon peel, green moss, mocha, safety orange and safety yellow, the latter two for uses such as traffic pylons.
Tel. (401) 725-8000, fax (401) 729-0166.
Tenneco introduces polyolefin closures
Tenneco Packaging of Lake Forest, Ill., has introduced a trademarked polyolefin SlideRite closure to aid consumers in the opening and reclosing of various kinds of flexible plastic packages.
The closure expands on the technology in Tenneco's 3-year-old Hefty One Zip bag system. SlideRite can close all kinds of consumer and food products including produce, cereal and bulk items.
The plastic slider can seal imprinted Hefty Fast-Pak bags holding delicatessen-sliced meats, cheeses or seafood.
Kimberly-Clark Corp.'s line of Huggies Supreme care wipes has the first SlideRite application in the consumer marketplace.
Tel. (800) 476-4300, fax (770) 232-9864.
Cookson, GE pallets meet fire standards
Pallets aren't a typical application for engineering thermoplastics, but Cookson Plastic Molding Corp. and GE Plastics have developed a pallet that meets the new National Fire Protection Association's standards for industrial fire safety.
The pallet is made from Noryl, a modified polyphenylene oxide resin, and Xenoy, a polycarbonate/polyester blend.
The pallet is listed with Underwriters Laboratories, so it can be used alongside existing wooden pallets without an upgraded sprinkler system or modifications to fire-protection schematics.
Latham, N.Y.-based Cookson boasts that the pallet is light, easy to clean, doesn't absorb oils, chemicals or water, and is easier to handle than wood.
``It is truly the highest performing 40-inch-by-48-inch pallet on the market today,'' said Bob Reivik, president of the Material Handling Division of Cookson. Cookson claims to be the world's largest producer of plastic pallets with plants in Latham; Mora, Minn.; Atlanta; and Essex, England.
Tel. (888) 738-8800, fax (518) 783-0004.
Co-Mack chair line cuts assembly time
Custom injection molder Co-Mack Technology Inc. of Vista, Calif., substituted molding processes and polymer materials in creating a replacement chair line for Angeles Group, a Pacific, Mo., children's furniture maker.
The group gave the project to Co-Mack technical support in early 1996, and Angeles President Ray Kelly was enthused about the results of the contemporary product's beta testing in June. Labor time for assembly dropped from eight minutes to 20 seconds, Kelly said in a telephone interview, and the shipping configuration minimizes bulk, especially helpful for exporting chairs to Europe, Asia and Australia.
Co-Mack coinjects a polypropylene skin over a PP structural foam core to make the chair seat and back on a 715-ton Battenfeld press, according to Joseph McRoskey, the firm's chief executive officer. Co-Mack injection molds the chair legs of a generic ABS on a 500-ton Cincinnati Milacron machine.
The coinjection process, known as sandwich molding, involves simultaneously injecting two materials into a mold from separate units through a common nozzle assembly. In this case, sensors, electronic systems and fast-response valves permit the skin to encapsulate the foam core in the finished product.
The previous Angeles supplier used rotational molding and blow molding for a high density polyethylene seat and back and an extrusion process for PVC legs, Kelly said. Co-Mack's design eliminated metal parts used on the original 1994 version.
While the piece price increased slightly, the company almost eliminated assembly labor, creating a ``nice savings,'' Kelly said. Co-Mack is making more than 5,000 units per month, but Kelly anticipates an increase in demand from day-care centers, preschools and elementary schools. The line has five colors, five leg heights and one seat size.
Tel. (760) 599-5100, fax (760) 599-4553.