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References in periodicals archive ?
A low-viscosity resin (with a high melt index) may be able to handle a high-structured carbon black to obtain a desired melt flow rate of the compound.
This is because when the injection pressure, melt flow rate, melt filling pattern change, due to 2, 5 and 8 position in the melt peak, with little change in the melt flow, so the small volume resistivity variation, and 1, 3, 7 and 9 position on both sides of the melt peak and 1, 3 position in near the gate, 7, 9 position in far from the gate.
The process can handle high operating pressures up to 2000 psi because of the robust spinnerette built, which enables it to spin a wide variety of resins with melt flow rate ranging between 5-2500 grams per 10 minutes and operate at lower temperatures that would result in more flexibility and higher energy cost savings.
The Consista[R] catalyst enables faster cycle times by increasing melt flow rates, while its broader molecular weight distribution improves the mechanical and processing attributes for a variety of applications.
The high melt flow rate of 80R90CD clarified PP reduces maximum molding pressure, allowing lower-tonnage machines to be used and contributing to longer tool life and reduced maintenance.
Its melt flow rate of 15g/10 min permits molding with higher length-to-thickness ratio, needed to fill the cavity for injection molding these components or any long thin part.
Melt flow rate, melt flow index, membrane osmometry, end-group analysis and dilute solution viscosity are a few examples.
Wax Content 0% 2% 4% Pellet Melt Flow Rate 0.47 0.63 0.63 Part Melt Flow 0.38 0.53 0.55 Volatile % 0.008% 0.008% 0.008% Density 0.949 0.949 0.949 Izod Ibf-ftlin 10.20 11.44 10.20 Flexural Modulus (psi) 164,447 168,343 166,538 Tensile @ Yield (pSi) 3805 3921 3762 % Elongation Average 374% 444% 607% % Elongation Increase (%) rel.
Yet high-flow resins require a similar, if not identical, amount of energy per pound to reach their processing temperature--the same as low-flow polymers, in fact, since their specific heat is largely unrelated to the melt flow rate (MFR).
A recent example is bioreactor-packing pieces where Axion's team achieved the precise melt flow rate to rapidly fill a complicated 24-up injection moulding tool.
The winning material is SUNVIEO, which is a high-performance thermoplastic vulcanizate with an exceptionally high melt flow rate.