We manufacture and supply injection molded plastic sunglasses engineered for wholesale distribution, private label collections, and OEM/ODM projects. Buyers can select from existing commercial-grade models or collaborate on custom frame colors, lens specifications, logo branding, and bespoke retail packaging.

Our high-precision injection molding setup ensures consistent shape replication, scalable volume output, and controlled unit economics for repeat production runs. Backed by strict dimensional checks and material traceability, every bulk batch is calibrated to match approved reference samples.

Standard Technical Specifications

Specification Parameter	Standard Verification Details
Frame Polymer	Confirmed resin grade (e.g., standard PC, high-elasticity TR90).
Dimensional Control	Lens width, bridge width, temple length, and total frame span measured against engineering drawings.
Hinge Assembly	Standard metal barrel hinges, spring hinges, or integrated plastic flex joints as per model design.
Lens Performance	Optical clarity, UV400 protection, and optional polarization layers backed by documentation.
Surface Finish	High-gloss tumbling finish, matte rubberized coating, or crystal-clear transparency.
Branding Application	Pad printing, laser engraving, or metal badge inlay on temples.

Selecting the Right Plastic Material for Your Line

Polycarbonate (PC) Frames: PC is widely used for structured, rigid frame designs featuring sharp geometric lines and complex contours. It accommodates a vast spectrum of solid and transparent color finishes. Final durability depends on the specific resin grade, wall thickness distribution, and mold cooling parameters.

TR90 (Grilamid) Frames: TR90 is a high-performance thermoplastic renowned for exceptional flexibility, memory retention, and low density. It is an optimal choice for activewear, lightweight daily frames, and collections where comfort and fatigue resistance are primary purchase drivers.

OEM, ODM & Private Label Customization

Color Matching: Custom frame colors can be matched using Pantone codes or physical color swatches. Color-fastness and batch consistency are verified prior to mass production.

Lens Configuration: Choose from standard solid tints, gradient colors, mirror coatings, revo coatings, or polarized options tailored to market requirements.

Branding Integration: Apply custom logos on outer/inner temples or lenses using durable industrial printing or laser etching methods.

Tooling & Development: For custom molds (ODM/New Tooling), engineering drawings or physical master samples are evaluated for draft angles, shrinkage rates, and parting line placement before tooling fabrication.

Quality Assurance & Inspection Standards

To mitigate supply chain risks for international importers, our internal quality control protocols monitor production across key milestones:

Molding Inspection: Checks for flash, sink marks, flow lines, warpage, and gate mark smoothness.

Dimensional Verification: Regular gauge checks to maintain symmetry and precise fit between lenses and frame grooves (beveled slots).

Mechanical Testing: Hinge endurance checks, temple tension alignment, and drop-ball impact resilience where applicable.

Optical & Coating Verification: Inspection for lens scratches, optical distortion, and validation of UV/polarization performance against agreed benchmarks.

Compliance, Packaging & Export Logistics

We ensure that your products arrive retail-ready and meet destination market expectations:

Retail Packaging Ecosystems: Complete your product line with branded collapsible hard cases, microfiber pouches, custom cleaning cloths, hangtags, and barcode-labeled retail display boxes.

Compliance & Safety: Relevant test documentation and optical standard reports (such as UV400, ISO, or CE guidelines) can be reviewed or requested based on your target market requirements prior to final confirmation.

Export Protection: Master cartons are structured with drop-test compliant corrugated layers to withstand international transit, damp environments, and container shipping pressures.

Frequently Asked Questions

Q: What file formats are accepted for custom logo and CAD design submissions?

A: Vector files such as AI, EPS, or PDF formats are required for logo and branding artwork. For custom mold development and OEM engineering, 3D CAD files (such as STEP, IGES, or SolidWorks parts) or detailed 2D engineering drawings with dimensional tolerances are preferred.

Q: What is the standard procedure and timeline for sample development?

A: Sample development begins after confirming the technical specifications, material grade, and color references. For existing catalog models with custom color or logo printing, sample lead times typically range from 7 to 14 days. For custom tooling (new mold development), prototyping and sample trial runs generally require 25 to 35 days depending on structural complexity.

Q: How is batch color consistency managed during bulk manufacturing?

A: Color consistency is controlled by matching production batches against master color swatches or approved physical pre-production samples under standardized lighting conditions. Resin masterbatches are measured and mixed according to established ratios, and injection barrel temperatures are regulated to prevent thermal degradation and color shifting across production runs.

Q: What are the standard payment terms for wholesale and OEM orders?

A: Standard export manufacturing terms generally involve a telegraphic transfer (T/T) structure, typically requiring a 30% deposit upon order confirmation and sample sign-off, with the remaining 70% balance payable against inspection documentation or copy of the bill of lading prior to shipment. Specific financial arrangements can be reviewed based on project scale.

Hot Tags: injection molded plastic sunglasses, China injection molded plastic sunglasses manufacturers, suppliers, factory