Laminated Glass Block, Rating "EIW"

Purpose. Laminated fire-rated glass of class EIW for partitions, doors and escape routes — where integrity, thermal insulation and radiant heat-flux limitation are all required simultaneously.

Construction and properties. Laminated glass with a silicate gel interlayer that, on heating (around 120 °C), expands, turns opaque and forms a heat-insulating, light-blocking barrier. Class EIW: E — integrity, I — thermal insulation (temperature rise on the unexposed face not exceeding 140 °C average / 180 °C local), W — limitation of radiant heat-flux density (not exceeding 3.5 kW/m² at 0.5 m). Typical ratings: EIW15, EIW30, EIW45, EIW60.

Governing standards. GOST 30247.4—2022 (test method, limit states E/I/W), GOST 33000-2014; structurally — GOST 30826-2014 (laminated glass) (complies with Russian national standards, mandatory for the Russian market).

Points to note. Gel-filled glass is considerably heavier and thicker than standard laminated glass — factor this into the frame load and fixing method. Check the UV stability of the gel composite. UNIALGLASS's own development — a frost-resistant gel rated to −40 °C (relevant for the North-West region).

UNIALGLASS composite glass block. A proprietary technology — filling one cavity of an insulating glass unit with a fire-resistant composite, subsequently cured under UV irradiation. Extended rating range EIW15…EIW90, high mechanical strength, excellent moisture resistance and stability across −40…+60 °C. Sizes from 300×200 to 3000×2200 mm (larger sizes by agreement); lead time from 7 working days.