Glass-fibre plastic, Composites


Glass-fibre plastic, Composites. Cleaning from sterol fumes.


On the production of items made from fiberglass plastic and composite materials used similar technologies based on usage of reinforced material, filling compound and binder. Now most common binding material types are polyester resin and special composites like gelcoats. Every of these components are air polluting source on a working area and technological ventilating emissions.

  • Dust. Produced while filling compound is loaded and finished goods are processed;
  • Fumes and aerosols of plasticizer, gelcouts, paint-and-lacquer materials and other technological additions;
  • Sterol fumes (sterol monomer). Items forming and gelcouts application emission;
  • Solvent fumes. Produced while finished items are processed and painted.

Most harmful and hard-to-remove in this list of pollutions are sterol and different solvents fumes. While production of fiberglass plastic and composite materials concentration of sterol and solvents in ventilating emissions can reach 500 mg/m3 of air.

Sterol (Vinylbenzene, Phenylethylene, Ethynylbenzene) C8H8/C6H5CH=CH2
Class of danger: 2
Limiting harmfulness rate: reflective-resorptive;
MPC one time maximal: 0,04mg/m3
MPC average daily: 0,002 mg/m3
Working area guideline, USA:
TLV (threshold limit value): 50 ppm; 213mg/m3
STEL (Short term exposure limit, not more 15 minutes, no often than 4 times during a shift): 100 ppm; 426 mg/m3)
Sterol irritates eyes, skin and respiratory tracts. Swallowing of liquid or inhalation of fumes can cause aspiration in lungs with risk of chemical pneumonia. Influence can cause loss of consciousness. Repeated or continuous contact with skin can cause dermatitis and sensitizing of skin. Repeated or continuous contact can cause asthma. Substance influences to central nervous system. Substance is carcinogenic for human.

Sterol monomer and solvents fumes can be removed from a working zone and fabrication facilities using exhaust ventilation and release into the atmosphere. But in that case two main difficulties appear.

  • Necessity to heat and fan incoming air in rooms.
  • Government limitation to release of harmful substances into atmosphere.

So many item manufacturers faced with the task to clean ventilating emissions and working area air from sterol monomer, solvents fumes, aerosols and dust.

Now available several technologies of cleaning air from sterol: absorbing (activated carbon), scrubbers (liquid absorption), biological cleaning, reburning, catalytic, photocatalytic and gas-discharge-catalytic. All these technologies have positive and negative sides.

”Ecopromika” company Ltd worked out and produce special equipment complex for cleaning air from sterol and solvents fumes – “Gasconvertor “Yatagan”. For today these type of equipment has the best “cost-quality” and “efficiency-dimensions” performance, practically doesn’t have replaceable parts, doesn’t need wastes utilization and has lowest cost of operation.“Gasconvertor “Yatagan” installations sterol cleaning efficiency confirmed by many tests on a stand in laboratory environment and operating enterprises.

Rest on field experience of “Gasconvertor “Yatagan” on a different enterprises, related to fiberglass plastic and composite materials production we recommend:

For full conformity with conditions of production specified installations by Customers request completed with different prefilters: dust prefilters (bag type single EU7 dust input filter or cascade EU4-EU9) or anti-aerosol volume absorption filters (Yatagan VAF).