12mm Tempered Safety Glass for Pool Fence - Premium Quality from China Suppliers and Factory

Tempered glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. When broken, it shatters into small granular chunks instead of splintering into jagged shards, making it safer for use in various applications.

Production Process (Pre-Tempering Fabrication)

• 1
  Cutting
  Large sheets of annealed (float) glass are cut to the exact required dimensions and shapes using automated glass cutting machines.
• 2
  Edging
  All edges of the cut glass are ground and polished. This removes sharp edges and micro-cracks that could lead to breakage during the tempering process. Frameless tempered glass has 3mm-5mm rounded safety corners to avoid scratching people. Edging can be flat, pencil, beveled, etc.
• 3
  Drilling/Notching
  Any holes, cut-outs, or notches required for hardware, hinges, or specific designs are precisely drilled or cut at this stage. It is critical that all fabrication is completed before tempering, as tempered glass cannot be cut, drilled, or modified once processed.
• 4
  Washing
  The prepared glass sheets are thoroughly washed with de-ionized water and brushed to remove any dust, debris, oils, or particles. This ensures a clean surface for uniform heating and prevents defects.

Tempered glass exhibits remarkable thermal stability, capable of withstanding temperature fluctuations ranging from 250 to 320°C. In contrast, ordinary annealed glass can only tolerate temperature changes between 20 and 100°C.

Tempering & Quenching Process

• 1
  Heating (Furnace Process)
  The clean glass is fed into a tempering furnace (also known as a tempering oven or lehr). Inside the furnace, the glass is heated to a very high temperature, typically between 620°C to 700°C (1150°F to 1300°F), which is just above its annealing point but below its melting point. The heating process is carefully controlled to ensure uniform temperature distribution throughout the glass. The glass softens slightly at this temperature.
• 2
  Quenching (Rapid Cooling)
  Immediately after reaching the desired temperature, the hot glass is rapidly cooled (quenched). This is achieved by blowing high-pressure air blasts onto both surfaces of the glass simultaneously and uniformly. The rapid cooling causes the outer surfaces of the glass to cool and solidify much faster than the inner core.
• 3
  Stress Creation (Compression & Tension)
  As the outer surfaces cool and harden, they contract. The interior, still hot and molten, continues to cool and contract more slowly. The faster-cooled outer layers are put into compression, while the slower-cooled interior remains in tension. This locked-in stress state (compressive stress on the surface and tensile stress in the core) is what gives tempered glass its significantly increased strength and its characteristic safe breakage pattern.

Materials

• Float Glass: High-quality annealed (regular) float glass is the base material. This can be clear, low-iron (extra clear), tinted, or coated float glass.
• Air: Used extensively in the quenching process.
• Water (De-ionized): Used for washing the glass.

• 1
  Interlayer Preparation
  The selected interlayer film (PVB, SGP, etc.) is trimmed to match the tempered glass panes precisely. When multiple glass sheets or interlayers are required, the stacking order is mapped out in advance.
• 2
  Clean-Room Assembly
  Inside a strictly controlled, dust-free and climate-regulated chamber, operators layer the tempered glass sheets with the interlayer(s) sandwiched between. Every precaution is taken to avoid trapping dust or debris. The basic layout is Glass | Interlayer | Glass, but more intricate stacks (e.g., Glass | Interlayer | Glass | Interlayer | Glass) are possible.
• 3
  Pre-Lamination (De-airing & Tacking)
  The assembled stack is passed through a roller nip or inserted into a vacuum bag/oven. This step evacuates the majority of trapped air, creates an initial tack, and prevents bubbles during final lamination.
• 4
  Autoclave Curing (Permanent Bonding)
  The pre-laminated unit is loaded into an autoclave—a sealed, high-pressure vessel. Under precisely managed heat (≈120–150 °C) and pressure (≈8–15 bar) for several hours, the interlayer melts and bonds permanently to the glass, forming one solid, inseparable panel.
• 5
  Controlled Cooling & Final QC
  After the autoclave cycle, the glass is cooled gradually. Comprehensive physical and optical inspections verify the absence of defects: delamination, haze, bubbles, or other flaws. Dimensional accuracy and specification compliance are also confirmed.

Tempered laminated glass marries the strongest virtues of tempered and laminated glass into one solution:

• Ultimate Protection: Even if one or both tempered lites shatter, every shard stays locked to the interlayer, eliminating flying debris.
• Solar Defence: The vast majority of interlayers—PVB and SGP in particular—filter out upwards of 99 % of damaging ultraviolet light, keeping furnishings from fading or deteriorating.
• Creative Freedom: Designers can embed tinted interlayers, custom prints, fabrics, LED lighting, or ultra-clear low-iron glass for striking visual effects.

Due to its superior safety and performance characteristics, tempered laminated glass is ideal for high-demanding applications:

• Overhead Glazing: Skylights, canopies, sloped glazing, roof lights – where falling glass is a critical concern.
• Structural Glazing: Glass floors, glass stairs, glass bridges, glass fins, and structural balustrades where the glass is a load-bearing element.
• Security & Safety Glazing: Bullet-resistant glass, blast-resistant glass, hurricane-resistant windows, forced-entry resistant applications.
• Balustrades & Railings: Both interior and exterior, especially frameless designs.
• Large-Span Windows & Doors: Where maximum safety and resistance to breakage are needed.
• Prisons, Banks, Museums, Art Galleries: For enhanced security and protection of valuable assets.
• Aquariums & Zoo Enclosures: Where robust, impact-resistant, and safe containment is essential.
• Silent Rooms & Recording Studios: Due to exceptional acoustic properties.
• Energy Efficiency: Can be combined with low-e coatings or specific interlayers for improved thermal performance.
• Bespoke Design: Allows for custom colors, patterns, and embedded materials for unique aesthetic results.

• Unrivaled Safety: The ultimate in safety glazing for architectural and high-risk applications.
• Extreme Durability: Resists breakage from severe impacts, seismic activity, and high winds.
• Structural Integrity: Can maintain protective barrier even after breakage, preventing fall-through or intrusion.
• Acoustic Comfort: Creates quieter indoor environments by significantly reducing outside noise.
• UV Shielding: Protects interiors from sun damage and fading.
• High Aesthetic Value: Clear, low-iron, or custom-designed options for various architectural styles.
• Long-term Performance: Excellent resistance to delamination and weathering.

Specific parameters will vary based on glass thickness, number of layers, interlayer type, and manufacturer capabilities.

• Glass Thickness Range: Each individual tempered pane can range from 3mm up to 25mm. Total laminated glass thickness varies widely, from 6.38mm (3mm+0.38PVB+3mm) to over 100mm for specialized bullet/blast-resistant glass.
• Interlayer Thickness:
  • PVB: Common thicknesses are 0.38mm, 0.76mm, 1.14mm, 1.52mm, or multiple layers (e.g., 2.28mm, 3.04mm).
  • SGP: Common thicknesses are 0.89mm, 1.52mm, 2.28mm.
• Number of Plies: Can be 2-ply (two glass panes + one interlayer), 3-ply, or more, depending on required strength and security.