2024 June 4

What Tempered Glass Screen Protectors Are Made of

Find out what tempered glass screen protectors are made of and where to order them in bulk. Moreover, you'll learn about the advanced features and benefits of resilient glass display guards. Discover how high-quality protectors offer unparalleled strength, bubble-free application, oleophobic coating, and uncompromised touch sensitivity.
3 layers: first, a 0.3 mm thick tempered glass layer with a 9H hardness rating, second, an oleophobic coating, and, third, a 0.1 mm adhesive layer.
3 layers: first, a 0.3 mm thick tempered glass layer with a 9H hardness rating, second, an oleophobic coating, and, third, a 0.1 mm adhesive layer.

Key Takeaways

  • Tempered glass screen protectors are made through a special heating and rapid cooling process that makes the glass up to 5 times stronger than regular glass of the same thickness. They can withstand over 100 MPa of surface compressive stress.
  • High quality tempered glass screen protectors have a precise fit, 9H hardness rating for scratch resistance, HD visual clarity, rounded edges for comfort, anti-blue light technology, responsive touch sensitivity, compatibility with 3D touch, anti-scratch coating, and bubble-free application.
  • A thin ~0.1mm adhesive layer is applied in a grid of microscopic droplets which spreads out evenly when the protector is applied, eliminating bubbles while keeping the protector thin to maintain touch sensitivity. Precision cut edges prevent lifting.
  • Anti-glare coatings use layers of metal oxides with different refractive indices to cancel out reflections. Oleophobic coatings made of low surface energy fluoropolymers cause oils to bead up for easy cleaning and smooth finger gliding.
  • Businesses looking to offer customers premium screen protection while maximizing margins can source high quality protectors in bulk from wholesale suppliers committed to innovation, quality and efficient worldwide delivery.
  • Evelatus, a wholesale supplier, offers premium tempered glass screen protectors in bulk at competitive prices.

The Strength of Tempered Glass

Tempered glass screen protectors are engineered using advanced heat-treated toughening technology, resulting in a surprisingly thin yet exceptionally strong product. The process of tempering involves heating the glass to extremely high temperatures, typically around 620°C (1,148°F), and then rapidly cooling it. This creates a surface compression of at least 69 MPa (10,000 psi) or an edge compression of not less than 67 MPa (9,700 psi), far exceeding the requirements for safety glass.

To be considered fully tempered safety glass, the surface compressive stress should surpass 100 MPa (15,000 psi). The tempering process alters the molecular structure of the glass, making it up to five times stronger than regular glass of the same thickness.

Shatterproof tempered glass undergoes rigorous EU-level testing to ensure optimal shock absorption and crack prevention. These tests may include the ball drop test, where a steel ball is dropped from a specified height onto the glass, and the pendulum test, which measures the impact resistance of the glass. Passing these tests is needed to demonstrate the screen protector's ability to withstand sudden impacts and resist shattering into sharp, dangerous pieces.

Good robust glass display armors are precision-cut. A precise fitment is required to ensure that the entire display is protected, leaving no vulnerable areas exposed. The edge-to-edge coverage also provides a seamless, bubble-free application, as the glass adheres perfectly to the contours of the phone's screen.

The hardness of tempered glass is rated around 9H on the Mohs scale, which is close to the hardness of sapphire. This means that the screen protector can withstand scratches from everyday objects like keys, coins, and even small pebbles that your phone might come in contact with.

Bubble-Free Application

Bubble-free application is achieved through an adhesive layer, approximately 0.1 mm thick, applied in a grid pattern of microscopic droplets. When the protector is pressed onto the screen, these droplets spread out and merge, seamlessly filling gaps and eliminating air bubbles. This ensures the adhesive layer remains thin and even, preserving the screen's touch sensitivity and responsiveness.

The right design prevents any lifting or bubbling at the edges, but the precision cutting of the tempered glass further is what really facilitates a smooth application process. Designed to match the exact dimensions and contours of specific phone models, the protector fits perfectly without interfering with front-facing cameras, sensors, or speakers.

Uncompromised Touch Sensitivity

Tempered glass screen protectors maintain the original touch sensitivity of a smartphone's display by utilizing high-quality, ultra-thin glass and advanced adhesive technology. The glass itself is typically around 0.3 mm thick, which is thin enough to allow the capacitive touch screen to detect the electrical charge from the user's fingertips accurately.

The screen protector's thinness ensures that the distance between the user's finger and the capacitive touch sensor remains within the required range for optimal touch sensitivity. Additionally, the oleophobic coating applied to the surface of the tempered glass reduces friction and enhances the smooth gliding of fingers across the screen.

The adhesive layer also plays a crucial role in maintaining touch sensitivity. The silicone-based adhesive is engineered to be as thin as possible, usually around 0.1 mm, to minimize any potential interference with the capacitive touch sensor. The adhesive is applied uniformly across the screen protector, ensuring consistent contact between the glass and the display.
Order tempered glass screen protectors wholesale

Antiglare Technology

The anti-reflective coating on the surface of the glass consists of multiple layers of metal oxides, such as silicon dioxide and titanium dioxide, which have varying refractive indices. As light passes through these layers, the reflections from each layer interfere with one another, ultimately canceling out a significant portion of the reflected light. This results in a screen that appears clearer and more readable, even under bright lighting conditions.

Additionally, the antiglare coating diffuses ambient light, reducing the intensity of reflections and preventing the mirror-like effect often seen on untreated screens. It’s worth noting that not every tempered glass screen protector features antiglare coating.

Asahi Dragontail Glass

Some reinforced glass display shields harness the incredible strength of Asahi Dragontail glass, a cutting-edge composition that rivals the durability of sapphire. This fortified glass exhibits exceptional impact and shatter resistance, absorbing powerful blows and dissipating force to keep the smartphone's display intact. Asahi Dragontail glass technology offers unbreakable screen protection that surpasses traditional tempered glass.

Oleophobic Coating

Oleophobic coating is a thin, transparent layer applied to the surface of tempered glass screen protectors to repel oils, fingerprints, and smudges. This coating is typically made of fluoropolymers, which have low surface energy. When oils from the user's skin come into contact with the oleophobic coating, they tend to bead up and can be easily wiped away without leaving residue. This helps maintain a clear, pristine screen and reduces the need for frequent cleaning.

The oleophobic coating also enhances the user experience by allowing fingers to glide smoothly across the screen.

High Quality Checklist

When looking for a high quality strengthened glass display protector, make sure it possesses the following qualities:
  • 9H hardness for superior scratch resistance
  • HD clarity for uncompromised visual quality
  • Rounded edges for a seamless, comfortable feel
  • Anti blue light technology which reduces eye strain
  • Highly responsive touch sensitivity
  • Compatible with 3D touch functionality
  • Anti-scratch coating for long-lasting durability
  • Bubble-free application for a flawless finish

Wholesale Opportunities

As a B2B wholesale supplier, Evelatus offers bulk quantities of premium shatterproof glass screen films at competitive prices. With a commitment to efficient worldwide shipping and timely delivery to retail stores, Evelatus is a reliable partner for businesses looking to provide their customers with the ultimate screen protection solution while maximizing profit margins.

To summarize the above

Tempered glass screen protectors have revolutionized the mobile accessory industry by offering unparalleled protection for smartphone displays. Through advanced tempering processes, precision cutting, and innovative coatings, these screen protectors deliver exceptional durability, clarity, and user experience.

By understanding the science behind the technology and the key features that define high-quality tempered glass, businesses can make informed decisions when sourcing products for their customers. Partnering with reliable wholesale suppliers committed to innovation and quality ensures that retailers can offer the ultimate screen protection solution while maximizing their profit margins. As smartphones continue to evolve, tempered glass screen protectors will remain an essential accessory for protecting valuable devices and enhancing user satisfaction.

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Written by Evelatus in 2024