Plastic cassette for rapid test

The primary material used is Medical Grade High-Impact Polystyrene (HIPS) or ABS plastic. It is crucial that the material is chemically inert to prevent interference with the lateral flow assay reagents. Additionally, the plastic must have low protein binding properties and be manufactured in a dust-free environment to ensure the clarity of the test window and the integrity of the results.

Compatibility depends on the internal structure and dimensions. You must verify the internal rib design, which holds the nitrocellulose membrane, sample pad, and conjugate pad in place. A precise clamping pressure is required; if it is too tight, it restricts flow, and if too loose, it causes 'flooding.' Always request technical drawings (CAD/PDF) to confirm the well position and window size align with your strip's detection line.

Suppliers should ideally hold ISO 13485 certification for medical device quality management. For the product itself, ensure the plastic resins are USP Class VI compliant or meet ISO 10993 for biocompatibility. If the final kit is intended for the US or EU markets, the components must support your FDA 510(k) or CE IVDR (In Vitro Diagnostic Regulation) registration process.

Look for a secure ultrasonic welding or snap-fit design that prevents leakage. The sample well (S) must be designed to prevent air bubbles, and the result window (T/C) should have a high-transparency finish for easy reading. For blood-based tests, integrated filter features or specific well depths may be necessary to manage sample volume accurately.

Implement a Pre-Shipment Inspection (PSI) focusing on flash, burrs, and deformation, which can compromise the airtight seal of the cassette. Use the AQL (Acceptable Quality Limit) 1.0 or 1.5 standard for medical components. On Made-in-China.com, you can utilize third-party inspection services to verify that the mold precision remains consistent across large batches.

Focus on mold ownership and maintenance. If you require a custom design, clarify who owns the injection mold and ensure the contract includes a guaranteed mold life (e.g., 500,000 shots). For standard models, negotiate based on annual volume forecasts rather than one-off orders to secure a 10-20% price reduction.

While plastic is lightweight, it is prone to electrostatic dust attraction and crushing. Ensure the supplier uses double-layered anti-static PE bags inside 5-layer corrugated export cartons. For sea freight, specify non-fumigation pallets and avoid top-loading heavy cargo on top of the cassette boxes to prevent warping or cracking.

Always verify the supplier's Business License and check if their scope includes 'Medical Device Components.' Use Secured Trading Services on Made-in-China.com to ensure payment is only released after the goods pass quality checks. Avoid direct transfers to private accounts; always use corporate accounts verified by the platform.