• PT Youtube
  • PT Facebook
  • PT Linkedin
  • PT Twitter
9/30/2014

BLOWN FILM: Foam Specific Layers In Coex Blown Film

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

Macro applies technology originally developed for cast to blown film.

Share

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

New technology from Macro Engineering & Technology Inc., Mississauga, Ont., gives processors the ability to foam particular layers on their coextrusion blown film lines.

With individual layer foaming, processors get more flexibility to create a wider range of products on a single line by manipulating different foamed layer combinations within the coextruded film structures, says Macro. Foaming can also reduce product weight and lower resin consumption. It can further improve film properties such as thermal and sound insulation. Moreover, foaming lets processors create opaque products without the need for fillers, says Macro.

Earlier this year, Macro announced the addition of individual layer foaming technology to its cast barrier film lines. Similar to the cast technology, the blown system features a proprietary feedblock through which nitrogen gas is injected. The configuration of the line allows it to be operated with or without foam injection, allowing the processor to easily switch between foamed films and conventional multi-layer film production without changing machinery.

 

RELATED CONTENT

  • Extrusion Troubleshooter

    Extrusion is a "black-box" process. We can't see what goes on inside an extruder, so we depend on instruments. We need to be sure that all sensors are working and readouts are calibrated correctly.

  • 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.

  • Solving 10 Common Challenges In Extruding Thin-Gauge Sheet

    Thin-gauge sheet production presents some unique challenges to the extrusion operator, including the following set of 10 commonly encountered considerations

Related Topics

Resources