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Microspheres (also called - cennospheres) are spherical particles of very small, micrometric size, often filled inside with various substances.

There are several types of microspheres; most commonly they are divided into:

  • ceramic (silicon-aluminum)
  • polymeric
  • glass

EEX specializes in production of ceramic microspheres (silicon-aluminum). Such microspheres are obtained, among others, during hard coal combustion, where they constitute one of the fly ash fractions.

Microspheres offered by EEX are packed in :

  • in big bags of 500 kg
  • in 20 kg paper bags
  • in bulk (silo)

EEX's commercial offering includes two types of ceramic microsphere:

  • Grey microsphere , which is the most commonly used type of microsphere, used for a wide variety of applications such as a light component in concrete, resins, plastics, paints, coatings, bricks, rubber, films and fillers. Gray microspheres are usually used where color is not important and where special technical-technological parameters, such as high temperature resistance, are not required.
  • White microsphere valued by the market both for its color and other properties than gray microsphere, including higher resistance to high temperatures. Hence white microsphere is used in advanced technological processes.

Both types of microspheres, grey and white, are offered by the Company both as part of the standard commercial offer and as part of customized offer, where physical and chemical parameters of microspheres are adjusted to individual customer requirements.

Offer Grey microsphere White microsphere
Offer standard
- Fraction 500/450 microns
- Fraction 300 microns
- Fraction 150 microns
- Fraction 80 microns
- Fraction 300-500 microns
- Fraction 300 microns
- Fraction 150 microns
- Fraction 80 microns
Offer customized
Production of microspheres with an individual combination of
physical-chemical parameters according to specific requirements of a given customer

The development of the EEX product offering proceeds in parallel in two priority directions:

  • individualization of the product adjusting its physical-chemical parameters, including specific gravity, granulation, color, chemical composition or a combination of these parameters, to the individual needs of a specific customer;
  • development of white microsphere sales at mass level (i.e. in relatively large unit batches).

 

PROPERTIES OF MICROSPHERES

Microspheres are characterized by unique physical and chemical properties, which make it a versatile material. From the point of view of directions of use, the key features of microspheres are such as:

  • Spherical shape

    Fillers with a spherical shape occupy a much smaller surface area than others. This means that microspheres do not require large amounts of binder. This allows the material to fill better and thus provide the right lightness, versatility and predictable shrinkage properties in the finished product.

  • Lightweight

    Microsphere is ¼ the density of many typical conventional fillers. This means that products made with microsphere are lighter in weight compared to others.

  • Low oil absorption

    The microsphere has very low oil absorption (in the region of 16g per 100g); this low absorption is due to the shape that the microspheres have and their smooth surface; this allows the formulation of binders with lower viscosity levels.

  • Hardness

    The microsphere is 5-6 on the Mohs scale, so the products produced have high erosion resistance and maintain their unchanged coating.

  • High melting point

    Microsphere melts at temperatures of 1200-1600 degrees Celsius. This allows the microsphere to be used in heat resistant products such as refractories and high temperature paints and coatings.

  • Good electrical conductivity

    Microsphere works well as cable composites.

  • Excellent insulation and thermal insulation properties

    Microsphere has a low thermal conductivity (0.11 Wm - k-1), which makes it an excellent heat insulator for many products such as geothermal cements, insulation pipes and low thermal conductivity paints and coatings

APPLICATIONS OF THE MICROSPHERE

Microspheres belong to a group of very innovative industrial materials. Although they have been known and present on the market for many years, they are still the subject of intensive research and development. New properties of microspheres are being discovered and new possibilities of their application are being developed. This means that the area of use of this material is not yet fully defined and is constantly expanding into new industrial fields. At present, microspheres are used to the greatest extent:

  • for the production and filling of building elements, insulating elements, insulating layers, wall linings and decorative elements,
  • for the production of refractory and interior materials for furnaces,
  • as insulating and self-lubricating powder for foundry moulds
  • as an additive to rubber and plastic products, as well as to paints and varnishes, causing an increase in the heat resistance of these products,
  • to increase the sound absorption of lining materials,
  • to decrease the flammability of PVC cable braids,
  • in crude oil processing,
  • in production of various types of electrotechnical ceramics,
  • as an excellent sorbent useful for removing contaminants (e.g. crude oil from the surface of water).

Microspheres

Application

The spectrum of companies that consume microspheres in their technological processes is therefore very broad by industry.
The largest scale of consumption is characterized by industries such as:

Automotive

Composites, primers, tires, casting molds, brake pads, trim, body fillers, plastics, soundproofing materials

Energy & Engineering

Oil well cements, drilling muds, industrial coatings, grinding materials, spacecraft coatings and composites, explosives, propeller arms

Construction

BMC and SMC stampings, injection molding, modeling, extrusion, PVC flooring, thin films, nylon, high density polyethylene, low density polyethylene, polypropylene

Plastics

tłoczywa BMC i SMC, odlewanie wtryskowe, modelowanie, wytłaczanie, podłogi PCV, cienkie powłoki, nylon, polietylen dużej gęstości, polietylen małej gęstości, polipropylen

Recreation

boats, floating equipment, bowling balls, surfboards, kayaks, golf equipment, footwear, lawns and garden decoration

Ceramics

refractories, pouring compounds, roofing tiles, fire bricks, aluminous cement, insulating materials, coatings

QUALITY MANAGEMENT

Quality management takes place at every level.

  • Automatic quality control sampling for every 20 kg of raw material/goods
  • In-house fully equipped laboratory for precise measurement of physical parameters of samples
  • Traceable quality - each sample is bar-coded, documented and
    archived
  • Flexible IT quality management system (QMS) - fully integrated with production and sales departments
  • We measure more than 10 different microsphere parameters, viz: resistance to hydraulic crushing; measurement of particle size distribution; using 3D laser analyser and sieves; bulk density, specific gravity, humidity, microsphere color, conductivity, falling parts, pH, microsphere biological activity
  • Eko Export has been certified to ISO 9001 and ISO 14001. In 2018 we received certification to the updated ISO 9001 and ISO 14001 standards of 2015
  • Each shipment of goods is accompanied by a certificate (quality certificate), which is the average of the test results of all pallets sent to the customer.