New styrenic copolymers bring high productivity.Thermoformers reportedly can double production rates for food containers with new styrenic copolymers from Nova Chemicals NOVA Chemicals is a leading chemical company jointly headquartered in Calgary, Alberta, and the Pittsburgh, Pennsylvania, suburb of Moon Township. It was founded in 1954. The corporation's chemical assets are divided into two divisions: Olefins/Polyolefins and Styrenics. , Moon Township, Pa. We first reported on these grades last December. The latest data show that Dylark FG 2500, an SMA (1) See SMA connector. (2) (Shared Memory Architecture) See shared video memory. (3) (Software Maintenance Association) A membership organization that began in 1985 and ended in 1996. , and Zylar EX 720, a clear styrene-acrylic, provide increased toughness and broad temperature performance. Zylar EX 720, an alternative to PET, PVC PVC: see polyvinyl chloride. PVC in full polyvinyl chloride Synthetic resin, an organic polymer made by treating vinyl chloride monomers with a peroxide. , PP, and SBC (1) (SBC Communications Inc., San Antonio, TX, www.sbc.com) A large, national telecommunications company that grew from a multitude of local and regional companies, including Southwestern Bell, Pacific Bell and Nevada Bell, into a single, unified brand by 2002. blends, boasts excellent clarity and toughness at temperatures down to -40 F. It remains ductile ductile /duc·tile/ (duk´til) susceptible of being drawn out without breaking. duc·tile adj. Easily molded or shaped. ductile susceptible of being drawn out without breaking. at freezer temperatures and reportedly processes more easily than PP. It can be downgauged in many applications because it is 20% stiffer than competing materials. For instance, Clear Pack Co., a thermoformer in Franklin Park Franklin Park, village (1990 pop. 18,485), Cook co., NE Ill., a suburb of Chicago; inc. 1892. It is chiefly residential. , Ill., used Zylar EX 720 to replace PP in produce trays. The company reduced tray thickness from 50 to 30 mils and doubled production to 100 parts/min. Dylark FG 2500, Nova's first SMA resin for applications other than auto instrument panels, provides "Freezer-to-microwave" performance from -40 F to 250 F. The material maintains stiffness even during elevated microwave heating, unlike competing filled and unfilled PPs, Nova claims. Tel: (412) 490-4000 * PT Direct. 279JK
TOUGHNESS &
WIDE TEMPERATURE RANGE
Zylar Dylark
EX 720 FG 2500
Property S-MMA SMA
Notched Izod
Impact, ft-lb/in. 2.0 5
MFR, g/10 min 2.0 0.6
Specific Gravity 1.08 1.06
Haze, % 4 --
Vicat Softening, F 200 253
HDT, F @ 264 psi,
annealed 189 212
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