Float glass 4 mm clear

Description

1. Product Overview
This product is a 4 mm annealed clear float glass manufactured via the industrial float process, offering parallel surfaces and distortion-free optics. It serves as a baseline substrate for windows, mirrors, laminated safety glass, and solar photovoltaic covers. Its strategic value lies in balancing cost efficiency with mechanical flatness, making it the most specified thickness for high-volume B2B glazing and processing industries worldwide.

2. Key Specifications & Technical Characteristics

• Chemical composition: Soda-lime-silica (SiO₂ 72–74%, Na₂O 13–14%, CaO 9–10%, MgO 3–4%)

• Purity level: Low-iron option available; standard grade: <0.1% Fe₂O₃ for green tint, clear grade: 0.08–0.12% Fe₂O₃

• Physical characteristics:

  • Thickness: 4 mm ± 0.2 mm

  • Light transmittance: ≥88% (visible spectrum, 3 mm equivalent basis)

  • Density: 2.50 g/cm³

  • Flatness: ≤0.3 mm/m bow/warp

• Packaging options: Interleaved paper or powder interleaving; A-frame steel stillages (1,800–2,500 kg); seaworthy wooden crates

• Shelf life: Indefinite under dry, clean storage (no chemical degradation)

3. Core Industrial Applications

• Building & construction (glazing): Residential and commercial windows, partition walls, balustrades. Performs better than thinner gauges (3 mm) in wind load resistance and acoustic damping.

• Automotive aftermarket : Side windows, quarter glass, sunroofs (as laminated intermediate layer). Provides consistent break pattern for safety processing.

• Solar photovoltaic : Tempered cover glass for standard PV modules. 4 mm thickness offers optimal stiffness-to-weight ratio vs. 3.2 mm for large-format panels.

• Furniture & display: Shelving, table tops, retail display cases. Superior edge chip resistance compared to 3 mm, reducing breakage during fabrication.

4. Competitive Advantages

• Quality consistency: <0.1 mm thickness variation across 3,210 mm × 2,250 mm jumbo sheets – top quartile in industry.

• Supply reliability: 120,000 MT annual capacity from three ISO-certified lines; 48-hour dispatch for standard orders from regional hubs.

• Logistics capability: Export-ready fumigated crates; real-time container tracking API for procurement teams.

• Cost competitiveness: $0.38–0.45/m² FOB (depending on volume) – 6–9% below EU/US spot averages for equivalent grade.

• Sustainability: 32% recycled cullet content; EPD available upon request.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 20 MT (approx. 8,000 m² per 4 mm thickness)

• Loading capacity (MT per 20 ft container): 20 MT (stillaged) per 20’ DV; 26 MT per 40’ HC