Cellulose Acetate
5-Barrel Hinge
Mazzucchelli Block
Explore 8 engineering-grade frame designs manufactured under strict micro-tolerances. Each unit represents high-precision multi-axis CNC profiling, biocompatible finishes, and certified ergonomic hinge mechanics.
When global optical chains, luxury private labels, and medical distributor groups evaluate OEM/ODM partners, suppliers are segmented by industrial clustering, material mastery, tooling velocity, and mechanical hinge patents.
Pioneering screwless and active hinge engineering, Urband combines European stylistic R&D with Singaporean quality governance and high-efficiency Shenzhen manufacturing. Specialized in pediatric flexibility (EYELET), women's high-fashion acetate (GLOSSI), and structural performance titanium.
Renowned for pure titanium and beta-titanium cold-forging. Japanese facilities command the pinnacle of micro-tolerances (+/- 0.02mm) and manual polishing steps, catering almost exclusively to ultra-luxury bespoke houses with extended 180-day tooling schedules.
The historical birthplace of European eyewear dynasties. Belluno factories set global trends in high-end Mazzucchelli acetate curation, intricate filigree core-wire embedding, and hand-finished galvanic gold/palladium dip-tank finishes.
The premier epicenter for mid-to-luxury export eyewear. Henggang-based facilities provide top-tier 5-axis CNC router operations, titanium vacuum ion-plating (IP), and rapid DFM turnarounds for top global designer brands.
Globally recognized for massive economies of scale in metal stamping, Monel, and injected CP/TR90 optical lines. Unbeatable for large-volume retail chain store private label programs requiring aggressive FOB price tiers.
The undisputed optical lens capital of the world, offering integrated turnkey frame-and-lens glazed solutions. Outstanding speed in blue-block, progressive, and reading glasses turnkey packages.
Historic French polymer center maintaining deep artisanal capabilities in hand-bevelled biological acetate, bespoke riveted hinge temples, and heritage luxury sunglasses with exquisite tortoiseshell patterns.
Celebrated for lightweight titanium wire and memory-metal flex frames. Korean workshops excel in minimalist urban aesthetics, thin sheet-metal laser micro-welding, and ultra-durable ceramic coatings.
Pioneers in high-spec medical and surgical frames, integrating advanced additive 3D SLS titanium printing with customized ergonomic nose-pad engineering and industrial laser scanning.
Specializes in ballistic safety glasses (ANSI Z87.1, EN166) and precision nylon sports wraps. Highly sophisticated co-injection molding capabilities uniting soft rubberized contact pads with rigid polyamides.
| Manufacturing Hub / Cluster | Core Materials Mastery | Average Tooling Lead Time | Specialized Mechanical Patents | Primary Sourcing Tier |
|---|---|---|---|---|
| Urband International (SG/FR/CN) | Acetate, Beta-Titanium, TR90, Ultem | 25 - 40 Days (Rapid DFM) | Screwless Hinge, Active Soft-Lock | Tier 1 Original ODM |
| Sabae (Fukui, Japan) | Pure Titanium, Solid Gold, Acetate | 90 - 150 Days | Micro-Forged Tension Temples | Tier 1 Bespoke Luxury |
| Belluno (Veneto, Italy) | Mazzucchelli Block Acetate, Monel | 60 - 90 Days | Traditional 5/7-Barrel Integrated Rivets | Tier 1 Haute Couture |
| Shenzhen (Henggang, China) | Acetate, High-Nickel, Titanium, Steel | 35 - 55 Days | Precision CNC & Ion Plating (IP) | Tier 2 Commercial Luxury |
| Wenzhou / Danyang (China) | Injected TR90, Stainless Steel, CP | 20 - 35 Days | Automated High-Volume Spot Welding | Tier 3 Volume Fast-Fashion |
As consumer expectations shift toward hypoallergenic wearability, circular sustainability, and smart electro-optical integration, procurement directors must adapt their supply chains to these structural evolutions.
Traditional acetate machining discards up to 75% of raw sheet material during CNC profile stamping. The industry is rapidly moving toward ISCC-certified bio-acetate (synthesized with bio-based plasticizers derived from wood pulp and cotton lint) alongside closed-loop scrap regrinding cycles that reduce volatile organic carbon footprints.
Hinge failure accounts for over 68% of post-sale optical returns. Retailers are systematically migrating wholesale assortments toward screwless friction hinges and patented active return springs. Systems utilizing nylon-string soft-locks eliminate backing-out micro-screws and radically decrease warranty overhead in high-use environments.
3D printing has transitioned from prototyping to full-scale production. Medical SLS using medical-grade Polyamide 12 and electron beam melting (EBM) of pure titanium powder allow parametric frame generation: individualized bridge widths, temple curves, and hollow temple internal channels built to order without tooling amortization hurdles.
Founded on lens-grinding precision in Singapore in 1960, Urband International has evolved into an intercontinental eyewear authority. With creative and ergonomic design studios in France, structural R&D historical ties to Japan, and high-efficiency precision production facilities in Shenzhen, we bridge the gap between design flair and manufacturing discipline.
Unlike generic trading suppliers who merely relabel catalog models, Urband manufactures proprietary collections engineered from raw billet materials, ensuring every hinge geometry, rim bevel groove, and temple tension meets rigorous international tolerances.
Evaluating frame longevity requires an intimate understanding of yield strength, elastic deformation limits, and chemical resistance across primary optical substrates.
Providing unprecedented elasticity and tensile strength exceeding 980 MPa, Beta-Ti is machined into ultra-thin temple segments (under 0.8mm) that flex around variable cranial anatomies without taking a permanent set.
Derived from Swiss Grilamid TR90, this transparent polymer delivers superior memory flex, a density of just 1.02 g/cm³, and total immunity to perspiration salts and cosmetic oils, forming the backbone of resilient pediatric lines.
An aerospace thermoplastic exhibiting continuous operating temperature resistance up to 170°C. Ultem enables ultra-thin optical rims with extreme dimensional stability that hold cold-lens glazing securely under torsion.
Aged for a minimum of 90 days to release internal solvent stresses, high-grade cellulose acetate sheets prevent post-manufacturing warping, enabling diamond-cut surface faceting and lustrous deep-barrel polishing.
Clear answers to critical technical questions asked by optical retail executives, private-label directors, and quality-assurance engineers.
For custom CNC-machined acetate frames, initial batch runs typically begin at 300 to 500 units per model (split across 2–3 colorways), as tooling costs are relatively low (focused primarily on temple wire core dies and CNC path programming). For metal injection or custom hinge molds, MOQs usually start at 1,000 units to amortize progressive steel stamping dies.
Every production run undergoes strict third-party lab qualification. We verify optical frames against EN ISO 12870 for mechanical strength, sweat resistance (perspiration immersion tests), bridge deformation under 100N load, and nickel release limits under EN 16128 (<0.5 μg/cm²/week). Full Declaration of Conformity (DoC) and FDA registration dossiers accompany every commercial shipment.
A Screwless Hinge eliminates the micro-screw entirely, using geometric slot interlocks or cylindrical friction pivots to connect temple to lug. An Active Hinge (such as our EYELET soft-lock or spring return) provides dynamic elastic deflection beyond the standard 90° open posture, automatically snapping the temple back into true optical alignment when lateral force is removed.
We employ a 3-stage validation funnel: 1) Initial 24-hour CAD/CAM surfacing and optical simulation; 2) High-resolution SLA/SLS functional 3D resin samples delivered within 5 business days for ergonomic bridge/temple fit testing; 3) Fully machined brass/acetate first-article samples matching final weight, color balance, and lens groove sizing prior to mass tool release.
Yes. Urband International's umbrella business model allows buyers to aggregate purchase volume across multiple brand portfolios—combining EYELET pediatric frames, GLOSSI high-fashion women's styles, URBAND PARIS active-sport frames, and COUPLE reading series—under one master procurement agreement, significantly reducing vendor management overhead.
Standard production cycles are 30 to 45 days for re-orders of existing tooling, and 60 to 75 days for completely new custom designs requiring unique stamping dies, custom wire-core carving, and custom color acetate curing. Expedited sample approval loops and ready-stock base frames are also accessible for fast-turn retail replenishment.
Whether developing a custom private-label acetate collection, sourcing high-durability pediatric frames, or securing an agile ODM partner with full regulatory dossiers, our engineering team is ready to assist.