Metal-Cased PU Eyeglasses Case – Rigid Metal Shell + 0.6mm Stretchable PU Leather + Flocked Lining for Shock Absorption and Drop Protection

PU-Covered Metal Case (This Model)

Compressive Strength: Metal frame withstands compression

Lifespan: Remains distortion-free for several years

Opening/Closing Feel: Hinge opens and closes crisply, becoming smoother with use

Lining Fit: Flocked lining—soft and scratch-resistant

Surface Texture: PU leather covering—scratch-resistant and stain-resistant

Drop Protection: Metal shell provides cushioning and impact resistance

The “high cost” of a metal eyeglass case isn’t about production costs—it’s an investment. Every metal eyeglass case undergoes three core processes: stamping, cold pressing, and hot-pressing with velvet lining. We don’t just make eyeglass cases; these sturdy cases serve as a “second skeleton” for the glasses.

How is a sheet metal eyeglass case made?

Many customers are curious about our manufacturing process, so here’s a brief breakdown:

First Layer: Stamping the Metal Sheet

We use a 60-metric-ton punch press to stamp a 0.4mm-thick galvanized steel sheet into the precise curved shapes of the case lid and base. The metal sheet undergoes anti-rust treatment and passes a 48-hour salt spray test without any rust spots. This forms the “skeleton” of the entire eyeglass case—without it, the case would be nothing more than a flimsy, limp shell.

Step 2: Cold-Press Laminating of PU Leather

We use a cold-press mold to tightly bond 0.5–0.8 mm stretchable PU leather (REACH-certified) to the steel sheet. The elasticity and thickness of the PU leather determine the firmness or softness of the texture—if it’s too thin, it lacks quality; if too thick, it becomes uneven and inflexible. We use 0.65 mm as our standard thickness, a “golden balance” selected through years of experience.

Step 3: Heat-Pressed Flocked Lining

The inner layer uses a flocking process, where short pile is heat-pressed onto the vacuum-formed sheet using specialized equipment. Further heat-pressing with high-temperature molds ensures the pile is fine and soft, preventing scratches on the lenses when inserted. Compared to ordinary foam linings, the flocked lining does not age or shed, offering a longer service life.

Step 4: Assembly and Magnet Installation

The three-layer structure is assembled and fitted with a strong spring hinge. The case opens and closes crisply and smoothly, with a deep, substantial sound—the moment you close it, you’ll hear the sound a high-quality case should make.

Why Is the “Feel” of Opening and Closing So Important?

You might think the “feel” of opening and closing is a minor detail. But for users who open and close their eyeglass cases several times a day, that feel is part of their impression of the brand.

A loose-fitting case → Users think, “This brand doesn’t pay attention to detail.”

A snug-fitting case → Users think, “This brand is high-quality.”

The opening and closing force of our metal eyeglass case has been fine-tuned through repeated testing—neither too loose nor too tight. It can be opened and closed with one hand, and when closed, it emits a deep, muffled “thud” that’s crisp and stable. This isn’t some mystical concept; it’s a matter of engineering detail. Many customers have told us, “I just love that sound.”

Who is using this metal eyewear case?

European optical brands: Used for packaging eyewear priced at 150 euros or more, printed with unique designs to enhance the unboxing experience

U.S. DTC brands: Require crush resistance, lightweight construction, and reduced return rates

Designer eyewear stores: Custom non-standard internal structures to match unique frames

Corporate gift customization: Hot-stamped logos; the metal eyewear case itself is reusable (for jewelry, stationery, etc.)

Customization Process
Submit Requirements – Dimensions, colors, logo design, lining preferences

Prototyping – 10–15 days to produce a physical sample for confirmation of texture, color, and fit

Confirmation – Mass production begins after your approval

Production – 25–35 days to complete the bulk order

Shipping – Air freight/sea freight; we offer drop shipping to overseas warehouses