Everything about Microspheres
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  • Solid Red Polyethylene Microspheres Announced

    Solid Red Polyethylene microspheres 250-300umSanta Barbara, CA –  May 28, 2010 – Cospheric LLC is now offering a product line of solid red polyethylene microspheres in particle size ranges from 10um to 1000um (1mm).

    Offering a bright red color.  These microspheres can be used as additives in personal care products, or in fluid flow visualization experiments.  Samples are in stock and ready to ship to customers for R&D use of product evaluation.  These high quality microspheres are specified to be greater than 90% spherical, and greater than 90% in the specified size range.

    Sample Density is 0.98g/cc (Custom densities are available)

    Spherical Particle sizes include:

    10-27um, 27-32um (30 micron), 32-38um (35 micron), 38-45um (40 micron), 45-53um (50 micron), 53-63um (60 micron), 63-75um (70 micron), 75-90um (80 micron), 90-106um (0.1mm), 106-125um, 125-150um, 150-180um, 180-212um (0.2mm), 212-250um (0.25mm), 250-300um (0.3mm), 300-355um (0.35mm), 355-400um (0.4mm), 400-500um (0.5mm), 500-600um (0.6mm), 600-710um (0.7mm), 710-850um (0.8mm), 850-1000um (0.9mm).

  • Microspheres for Coatings Applications (Opaque Polyethylene)

    Microspheres are well known in the coatings industry for their use as low-surface-area fillers that offer benefits in viscosity and density control, solids content, application and flow characteristics.

    Hemispherically Coated Spheres

    Cospheric LLC, a Santa Barbara-based microtechnology company, recently launched a line of opaque polyethylene microspheres that act as a superior opacifying agent and provide maximum hiding power with just one monolayer of microspheres as small as 40 microns in diameter. Microspheres are manufactured in any color imaginable and even in combinations of two differently colored hemispheres. Continue reading “Microspheres for Coatings Applications (Opaque Polyethylene)” »

  • Exfoliating Beads: Clinical Study

    Mickey McDonnell – Honeywell, United States  conducted a study about exfoliating polyethylene beads ~325um diameter.  His article was published in personal care magazine.

    300-355um Diameter PE microspheres

    ABSTRACT from article:
    Exfoliating beads have a long history in cosmetics, but we are unaware of previous studies on the effect of their regular use. A clinical study with 10 subjects shows that regular exfoliation leads to a reduction in the cell turnover time of the stratum corneum (SC) by about 15% (significant at the 95% level). Standard models of skin function interpret increased cell turnover time as increased desquamation. The regularly exfoliated skin also had a significantly increased uptake of dansyl chloride dye. Higher stain uptake accompanying the increase in desquamation suggests that regular exfoliation promotes addition of new cells to the SC. The study acclimatised the test panel to the exfoliant treatment for two weeks prior to the measurements to minimise the chance that results could be attributed to a shift in treatment procedures.

    ************ Comments  ************

    The author calls the exfoliating material beads (325um).  But they are also commonly called polyethylene microspheres.

    This study focuses on abrassive exfoliation with polyethylene microspheres.  Exfoliants can also work through the use of either itty bitty bits of abrasives such as crushed apricot pits, crushed almond shell, pumice, etc., or light acids like salicylic, citric, malic, etc. The means are different but the results are the same. Exfoliants remove the dead skin cells from the face that cause a clogged pore. The removal of these dead skin cells will minimize pores and open pores for cleaning. Microdermabrasion is yet another effective exfoliation method that, while it can be done at home, is generally done at salons.

  • What is a Microsphere?

    Hollow Glass Microspheres 70xDefinition From Wikipedia,

    Microsphere is a term used for small spherical particles, with diameters in the micrometer range (typically 1μm to 1000μm (1mm)). Microspheres are sometimes referred to as microparticles.

    Microspheres can be manufactured from various natural and synthetic materials. Glass microspheres, polymer microspheres and ceramic microspheres are commercially available. Solid and hollow microspheres vary a lot in density and, therefore, are used for different applications. Hollow microspheres are typically used as additives to lower the density of a material. Solid microspheres have numerous applications depending on what material they are constructed of and what size they are. Continue reading “What is a Microsphere?” »