These two properties of melt index
and density control many of the other physical properties for PE materials.
The pipe shall be homogenous throughout and free of visible cracks, holes, voids, foreign inclusions, fillers, or other deleterious defects and shall be identical in color, density, melt index
, and other physical properties throughout.
High Melt Index
Specialty Elastomers used in hot melt adhesives for high performance flexible packaging, and hygiene and medical markets.
It captures not only melt index
values, but also shear stress, shear rate, viscosity and apparent melt density, while also recording testing conditions.
BP&R SPOKE TO ZWICK'S MARKETING MANAGER, ALAN THOMAS, ABOUT SOME OF THE NEW DEVELOPMENTS IN TESTING RHEOLOGICAL AND MECHANICAL MATERIAL PROPERTIES SUCH AS MELT INDEX
, TENSILE STRENGTH AND HEAT DEFLECTION TEMPERATURE, WHICH ARE COMMONLY MEASURED IN TESTING LABORATORIES FOR GENERATING MATERIALS PERFORMANCE DATA AND PERFORMING QUALITY CONTROL AS WELL AS FOR DEVELOPING NEW COMPOUNDS OR TROUBLESHOOTING.
Temperature/[degrees]C Raw material 170 190 200 210 230 Melt index
(g/10 min) 1.
In the melt index
measurements, 2010 got a value of just over 2, similar to 2007.
Polymers: EVAC copolymer A -- 85[degrees]C -- melt index
400, EVAC copolymer AA --85[degrees]C -- melt index
250, EVAC copolymer B -- 105[degrees]C, EVAC copolymer C -- 120[degrees]C, EVAC copolymer D -- 124[degrees]C, carnauba wax -- from Michelman, Inc.
File instrumentation will be suitable for processing and preparing any type of polymeric materials based on thermoplastics and thermoplastic elastomers, and mixtures thereof, as well as composites and nanocomposites, powdered ceramic materials bonded with the polymer matrix, with an appropriate melt index
Material properties test according to ASTM D3350 for density, melt index
, flexural modulus, tensile strength at yield, slow crack growth resistance, hydrostatic strength classification, color and UV stabilization; and
This work also includes investigation of other polymer design variables, including higher melt index
versions optimized for very high flow TPO compounds.
Topics will cover tension/compression/flexure, impact, hardness, melt index
, torsion and fatigue testing.