Please visit: Expancel
2240 Northmont Pkwy.
Duluth, GA 30096-5835 US
Expancel expandable thermoplastic microspheres used as blowing agents in systems heated to 200-400 F. Microspheres are white, spherical polymeric particles. Thermoplastic shell encapsulates a gas and softens when heated, allowing expansion from the increased internal vapor pressure. Expansion factor is 40-60 times the original volume. Other features include defined cell size, closed-cell structure. Suitable as a blowing agent in plastisols, elastomers, thermosets, and thermoplastics.
Thermoplastic microspheres are ultra-lightweight, flexible, and resilient. Average density between 0.025 and 0.060 g/cc; average particle diam. of 20 to 140 microns. Uniform cell structure and compatibility with resins such as PUR, epoxies, PVC, and PE. Also used in polyesters as a lightweight filler that imparts enough flexibility to the composite to reduce cracking and brittleness.
Available unexpanded for in-situ foaming. RIM applications incorporate Expancel DU (dry, unexpanded) to achieve target densities and reduce shrinkage. PVC plastisols use Expancel DU for uniform, controlled voids in foaming. Grades available at expansion temperatures from 176 to 400 F.
Expancel expandable thermoplastic microspheres used as blowing agents and low-density fillers also serve as impact modifiers for thermosets and elastomers. Resilient nature of spheres allows deformation without breakage, thereby improving impact resistance and reducing stress. In elastomeric materials, the resiliency of Expancel improves compatibility between filler and matrix material.
Bioplastics take center stage.
Compounders, molders, and extruders will find new answers to virtually all their additive needs at NPE 2003.
Injection MoldingHybrid Press Has Electric ClampNew injection presses that combine servo-electric and hydraulic movements to achieve high performance with energy efficiency will be discussed by Arburg Inc., Newington, Conn.
A half-dozen processors in the U.S. are testing small amounts of hollow polyacrylonitrile microspheres from Akzo Nobel’s Expancel Div. in Duluth, Ga., to make paper-like films that insulate hot food.
There were new additives for every need at NPE 2006: Make your plastics prettier with new colorants. Make them stronger with new fillers and reinforcements. Make them lighter with foaming agents. Or just make them go away with improved purging agents and biodegradable masterbatches.