Acetate Cat-Eye Optical Frames

Cellulose acetate cat-eye optical frames combine plant-based polymer material with a distinct upswept silhouette suited for diverse facial structures. Built for optical distributors and private label brands, these frames balance structural rigidity with adjustment flexibility for prescription lens mounting. Production utilizes high-density Mazzucchelli acetate sheets cured for dimensional stability, preventing warping across temperature fluctuations.

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Description

Technical Parameters

Key Features

High-Density Cellulose Acetate: Plant-derived polymer base offering rich color depth, hypoallergenic properties, and hand-polished gloss retention.

Core Wire Integration: Embedded stainless steel wire cores inside temples allow precise optician adjustments and maintain pantoscopic alignment.

Multi-Barrel Hinge System: Five-barrel or seven-barrel nickel-silver hinges secured with threaded rivets for long-term opening durability.

Ergonomic Bridge Design: Integrated or sculpted keyhole bridges engineered to distribute frame weight evenly across the nasal bridge.

Cold-Forming Capability: Acetate material softens under controlled heat (70°C to 80°C) for stable lens insertion and custom frame fitting.

Materials & Specifications

Material Composition

• Front & Temples: 100% Mazzucchelli cellulose acetate (phthalate-free plasticizer).

• Core Wire: Medical-grade stainless steel (SUS304).

• Hinges & Screws: Nickel-silver alloy with anti-loosening threadlocker coating.

Technical Specifications Matrix

Specification Item	Standard Parameters	Tolerance / Grade
Material Density	1.30 g/cm3	+/- 0.02
Water Absorption	< 0.4% (24h immersion)	ISO 62 compliant
Tensile Strength	65 MPa	ISO 527 compliant
Lens Width Options	52 mm / 54 mm	+/- 0.5 mm
Bridge Width	16 mm / 18 mm	+/- 0.3 mm
Temple Length	140 mm / 145 mm	+/- 1.0 mm
Base Curve	4 base / 6 base	Precision milled

Frame Construction

[Acetate Sheet Sourcing]
[CNC Milling (Front & Temples)]
[Core Wire Insertion (High-frequency heat pressing)]
[Tumbling & Barrel Polishing (3-stage wooden peg grinding)]
[Hinge Riveting & Alignment Inspection]
[Final Hand Buffing & Ultrasonic Cleaning]

Production follows a strict machining sequence. CNC milling machines cut frame fronts and temples from cured acetate slabs with a tolerance of 0.05 mm. Stainless steel wire cores are inserted into the temple channels using high-frequency thermal insertion machines to ensure straight alignment. Surface finishing involves three stages of wooden peg tumbling followed by manual diamond paste buffing to eliminate tool marks and achieve a consistent surface finish.

Design & Size Options

Silhouette: Classic upswept cat-eye with softened brow angles to accommodate both progressive and single-vision lenses.

Colorways: Solid black, Havana tortoise, crystal clear, gradient tones, and custom laminated multi-layer blocks.

Custom Dimensions: Adjustable sizing parameters for bridge width, eye size, and temple length based on target demographic fit profiles (Asian fit or European fit).

Surface Finishes: High-gloss polished, matte-etched (sandblasted texture), or raw tumbled unfinished blanks for custom dyeing.

OEM & ODM Customization

Private Label Branding: Laser engraving, hot-foil stamping, or metal logo plaques embedded inside temple tips.

Drawing-to-Sample Prototyping: 3D CAD modeling conversion from client technical drawings (STEP/IGES formats) to functional acetate prototypes within 7 days.

Custom Color Matching: Pantone (PMS) or physical color swatch matching for exclusive acetate sheet laminations.

Packaging Customization: Branded hard cases, microfiber pouches, custom-printed cleaning cloths, and barcode-labeled outer cartons.

Manufacturing & Quality Control

Production facilities operate 45 automated CNC routing centers, 12 barrel-tumbling lines, and dedicated optical alignment test benches. Quality control protocols enforce inspection gates at every production phase:

Raw Material Stress Test: Acetate sheets undergo thermal shrinkage testing at 70°C for 48 hours to screen for internal material stress before cutting.

Hinge Fatigue Testing: Sample temples undergo 20,000 continuous open-close cycles on pneumatic test rigs to verify hinge torque retention.

Dimensional Verification: 100% of finished frames are checked on optical comparator shadowgraphs to verify lens groove depth (1.2 mm +/- 0.1 mm) and bevel angles.

Environmental Resistance: Salt-spray corrosion testing (ASTM B117) applied to all metal hinges and screws for 48 hours to ensure zero oxidation.

Compliance Standards: ISO 12870 (Ophthalmic optics - Spectacle frames requirements), CE certification, and FDA general medical device listing compliance.

Applications

Prescription (Rx) Eyewear: Suitable for mounting high-index, progressive, and heavy astigmatism lenses due to high frame rigidity.

Blue-Light Blocking Glasses: Deployed for computer and digital screen-use eyewear collections.

Optical Retail Chains: Mass stock supply for seasonal fashion collections requiring consistent sizing and fit.

Independent Designer Brands: Small-to-medium batch contract manufacturing for boutique eyewear lines.

Packaging & Order Information

Individual Packaging: Each frame is fitted with a dummy demo lens, wrapped in a protective polybag, and slid into a sleeve with model barcodes.

Master Carton Specs: 12 pieces per inner white box, 10 inner boxes per master carton (120 pieces total). Carton dimensions: 60 cm x 40 cm x 35 cm, gross weight approx. 12 kg.

MOQ: 300 pieces per model, split across up to 3 colorways (Minimum 100 pieces per color).

Lead Time: 30 to 40 days for bulk production following sample approval and deposit receipt.

Shipping Terms: FOB, CIF, or EXW via sea freight or air express (DHL/FedEx for samples).

FAQ

Q: What is the minimum order quantity (MOQ) for custom acetate colors?

A: The MOQ for custom-laminated acetate sheet color matching is 500 pieces per colorway, as custom sheet extrusion requires specific raw material batch setups. Standard catalog colors are available at an MOQ of 100 pieces per color.

Q: How do you prevent the acetate frames from shrinking or warping over time?

A: All acetate sheets are fully cured and seasoned in temperature-controlled warehouses for a minimum of 90 days before machining to release internal chemical stresses. This stabilizes the polymer chain, preventing post-production warping.

Q: Can these cat-eye frames accommodate progressive and high-index lenses?

A: Yes. The frame fronts feature a standard V-bevel lens groove depth of 1.2 mm and a robust wall thickness around the eyewire perimeter, providing sufficient structural support to hold heavy high-index or thick progressive lenses securely without cracking.

Q: What hinge type is standard, and can spring hinges be integrated?

A: Standard production utilizes durable five-barrel nickel-silver hinges. Spring hinge integration is available as an OEM option for customers requiring extended temple expansion and comfortable side-of-head pressure distribution.

Q: How do you handle quality discrepancies or defective pieces in bulk orders?

A: AQL 2.5 sampling standards are applied prior to final shipment. If manufacturing defects (such as loose hinges, misalignment, or surface pitting) exceed 1.5% of the total shipment volume, replacement units are supplied free of charge in the subsequent order or reimbursed directly.

Q: Are these frames compliant with international optical regulations?

A: Yes. Materials comply with EU REACH regulations regarding phthalates and heavy metals, and frames meet ISO 12870 mechanical performance standards for ophthalmic spectacle frames. Test reports are available upon request.

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