Patent 9,074,062 (July 7, 2015), "Process for Preparing High Melt Strength
Propylene Polymers," Umasankar Satpathy and Ajit Behari Mathur (Reliance Industries Ltd.
This means that PS has relatively higher viscosity and melt strength
at normal processing temperature (230 C, 446 F) and foaming temperature (120-140 C, 248-284 F).
Isotactic polypropylene (iPP), due to its outstanding functional characteristics, such as low density, high melting point, high tensile modulus, excellent chemical resistance, and low material cost, has been considered more competitive in producing polymer foams than other thermoplastics, such as polyethylene and polystyrene , However, the low melt elasticity and low melt strength
result in the cell walls of iPP rupturing very easily during the foaming process, which makes foamed iPP usually have a high open-cell content and deteriorated quality .
16 Kg weight, a melting point in the range of from :130 to 180[degrees] C and a melt strength
in the range of 5 cN to 50 [degrees]N; providing 15 to 60 percent by weight of a chlorinated polyethylene; providing less than 40 percent by weight of a filler; providing 1 to 20 weight percent by weight of an adhesion promoting agent comprised of an acid or acid derivative functionalizecl polyolefin; providing 0.
Borealis has pioneered the performance and material-saving capabilities for low density foams with its market-leading high melt strength
polypropylene (HMS PP) Daploy[TM] product generation and technology.
In speciality film and injection-moulded applications, the products should bring improved toughness, flexibility and higher melt strength
The primary objective of this article is to demonstrate the effects of increased levels of an acrylic melt strength
enhancer on the free foamed extrusion properties of poly lactic acid (PLA) and the related process stability and cell structure.
The flowability of PBT, coupled with its high melt strength
, allows extremely small fibers to be manufactured with a diameter less than 1 pm.
The new additive, Paraloid[TM] BPMS 250 melt strength
enhancer, enhances the processing of sustainable polylactic acid (PLA) and its alloys, compostable materials derived from corn and used in clear packaging applications such as thermoform or vacuform disposable, clamshell-type food containers.
Patent 8,987,382 (March 24, 2015), "High Melt Strength
Polyethylene Compositions and Methods for Making the Same," Mehmet Demirors, Teresa Karjala, and Nicolas Mazzola (Dow Global Technologies LLC, Midland, Michigan, USA).
The thermoforming grades are said to offer increased melt strength
, resulting in more uniform wall thickness and lower part weight.
Tenders are invited for Purchase of Melt Strength