A new TPO is said to offer greater dimensional stability than its predecessors. Sequel 1828 is the latest addition to the 1800 Series first introduced in 2005 by Solvay Engineered Polymers, Inc., Auburn Hills, Mich. This series reportedly has replaced more expensive engineering thermoplastics and alloys such as ASA, PC/ASA, and PC/PBT. With a CLTE of 3.5 x 10-5 mm/mm/°C, Sequel 1828 is at least 10% more dimensionally stable over a range of temperatures than any other product in the company's extensive TPO portfolio. This suits it to tight-tolerance auto body panels such as fenders, body claddings, or moldings that are in contact or close proximity to sheet metal. Mold shrinkage as molded is 0.4% and shrink after bake is 0.5%. Sequel 1828 has 65 Shore D hardness and 12 MFR, so it can easily fill larger, thinner, and more complex molds, according to Solvay. Solvay claims this TPO can compete with 30% glass-filled TPU and possibly even with glass-filled nylon in some cases. Shrinkage and CLTE of Sequel 1828 reportedly are more isotropic than those of glass-filled materials. The latter also cause more wear and tear on molds and machinery, says Solvay. Tel: (800) 527-6486 . www. solvayengineeredpolymers.com
LyondellBasell Advanced Polyolefins
1200 Harmon Rd. Auburn Hills, MI 48326
Phone (248) 391-9500 Fax (248) 391-9501
Editor PickThe Need for Generalists: Part 3
In failure analysis, there is a tendency to gravitate to a few common test protocols. But this approach can result in a mismatch of techniques to the problem.