• PT Youtube
  • PT Facebook
  • PT Linkedin
  • PT Twitter

Sunroof Module Is All Short-Glass PP

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

The first fully integrated automotive sunroof module made entirely of short-glass PP replaced long-glass PP and short-glass ASA/PBT on the 2010 Cadillac CTS. The 1-m2 part was designed and built by Inalfa Roof Systems, a Dutch company with offices in Auburn Hills, Mich. The single-piece frame replaces a four-part assembly of metal, ASA/PBT, and long-glass PP. Use of Thermylene P7-45FG-0790 45% short-glass, chemically coupled PP from Asahi Kasei Plastics North America, Inc., Fowlerville, Mich., reportedly saved 12% in weight and 24% in component cost. According to the company, its material “provides long-fiber performance properties with the weight, cost, and processing advantages of short-fiber resin technology.” Molding cycles were 15 sec shorter, and eliminating assembly saved an additional 67 sec.


  • The Importance of Melt & Mold Temperature

    Molders should realize how significantly process conditions can influence the final properties of the part.

  • Melt Flow Rate Testing–Part 1

    Though often criticized, MFR is a very good gauge of the relative average molecular weight of the polymer. Since molecular weight (MW) is the driving force behind performance in polymers, it turns out to be a very useful number.

  • PBT & PET Polyester: Part 2 The Performance Factor

    All things being equal, PET will outperform PBT mechanically and thermally. But the processor must dry the material properly and must understand the importance of mold temperature in achieving a degree of crystallinity that allows the natural advantages of the polymer to be realized.