 |
The HYDROCEROL PEX Series is specially developed for Packaging EXtrusion applications where thermoforming characteristics of the finished film are a key issue. PEX Series foaming agents produce an especially fine-celled foam structure, enabling thermoforming without surface defects. Density reductions between 15 to 30% are usual in standard monolayer as well as in co-extruded (e.g., A-B-A) applications. HYDROCEROL PEX formulations are available for most common packaging resins, such as PP, PE, PS and PET.
When used in the structural foam molding process, chemical foaming agents generate a cellular foam structure in the part interior. This technology delivers many advantages, including the following:
|
- Reduced part weights
- Reduced cycle times
- Reduced warping and sink marks
- Improved melt flow
- Improved dimensional stability
- Enhanced specific mechanical properties
|
In foam injection molding, the foaming agent masterbatch (or powder) is either mixed or fed together with the polymer. The reaction of the CFA and the compression of the gaseous components are comparable to those in the extrusion process. | |  |
The cavity is only partially filled with polymer melt during the injection phase, then expansion of the blowing gas completes the fill. No holding pressure or cushion is required during either cell growth or subsequent cooling. The foam injection process can be compared to co-injection technology, where component A is the used polymer and component B the gas from the CFA.
Density reductions ranging from 5 to 30% are possible with foam injection molding, depending on the ratio of foaming agent to injected resin. In special cases where polymer choice, part geometry and all other relevant process parameters are optimized, weight reductions as high as 50% are possible.
|
HYDROCEROL Regional Contact Information
North America
Clariant MB
382 Arbor Court
Winchester, VA 22602
USA
Phone: +1-540-665-1865
Fax: +1-540-665-2917
HYDRO-NA@clariant.com |