Low-E Coated Bent Tempered Insulating Glass | Single/Double/Triple Silver |

Product Specification

Product Overview

Low-E Coated Bent Tempered Insulating Glass is a curved energy-efficient safety glazing unit made from bent tempered glass with a low-emissivity (Low-E) coating, sealed with a spacer, desiccant, and dual-seal system to form an insulating glass unit (IGU).

It combines curved architectural design, tempered safety performance, Low-E thermal control, and insulating cavity energy efficiency in one product.

Typical applications: curved curtain walls, skylights, sightseeing elevators, arched windows and doors, and specialty façade systems.

Structure

The Low-E coating is enclosed inside the cavity, normally on surface #2 or #3.

Key Features

• Energy saving: Reflects mid- to far-infrared radiation; lower U-value than standard insulating glass
• Solar control: Reduces solar heat gain and cooling load
• Daylighting: Maintains high visible light transmittance options
• Safety: Bent tempered glass breaks into small blunt particles
• Acoustic comfort: Cavity structure improves sound insulation; argon fill further helps
• Anti-condensation: Dry cavity and warmer indoor glass surface reduce fogging
• UV reduction: Helps slow indoor fading
• Design freedom: Supports concave/convex arcs and custom curved façades

Compared with ordinary insulating glass of similar build-up, Low-E IGU configurations can typically improve energy performance by about 40%, depending on coating type and gas fill.

Coating System (Silver Layers)

Surface position guide

• Cooling-dominated regions: prefer surface #2 (lower SHGC)
• Heating-dominated regions: prefer surface #3 (better winter heat retention)

Offline (soft-coat) Low-E must be used in sealed IGU; edge deletion is required before sealing.

Colors & Optical Grades

Appearance colors: clear, ultra-clear/low-iron, light blue, deep blue, blue-grey, light grey, European grey, green, bronze/teal, silver metallic, custom colors

Optical grades by visible transmittance (Tvis):

• High transmittance: ≥60%
• Medium: 50–60%
• Solar-control / lower Tvis: ≤50%

Outdoor reflectance is commonly controlled in the 10–30% range to balance performance and glare/light pollution.

Processing Technology

1. Float glass selection and inspection
2. Cutting, edging, and washing
3. Low-E coating (online hard coat or offline sputtered soft coat; single/double/triple silver)
4. Bent tempering with forced convection heating (critical for Low-E heat uniformity)
5. Edge deletion for offline Low-E
6. Spacer forming and 3A molecular sieve filling
7. Primary seal (butyl) and assembly with matched arcs
8. Secondary seal (polysulfide or silicone)
9. Optional argon filling
10. Final tests: dew point, airtightness, gas retention, arc match, coating integrity

Quality references: GB/T 18915.2 (Low-E), GB/T 11944 (IGU), GB 15763.2 (tempered glass), or equivalent project standards.

Selection Guide

One-Sentence Marketing Definition

Low-E coated bent tempered insulating glass is a curved safety IGU with single-, double-, or triple-silver Low-E coating sealed in a dry air/argon cavity, delivering energy efficiency, solar control, acoustic comfort, and architectural curved aesthetics for façades, windows, and skylights.