Medical Multi-Layer Film Lamination：High-barrier medical-grade materials (e.g., PE/PA/EVOH) are co-extruded to form a multi-layer composite structure, ensuring leak-proof, contamination-resistant, cryogenic-tolerant (-80°C), and tear-resistant properties, compliant with ISO 13485 Medical Device Quality Management Standards.

Material Stabilization & Static Aging：Static aging is conducted in a controlled environment (constant temperature and humidity) for 48 hours to eliminate internal stress, enhance interlayer bonding strength, and prevent delamination during long-term storage, meeting biological sample stability requirements.

Hot Press Molding & Sealing：Fully automated thermal sealing machines precisely control temperature (120-150°C) and pressure to seal three edges and form the injection port. Weld strength ≥30N/15mm ensures no cracking during transport.

Intelligent Gluing & Labeling：Laser marking systems imprint unique traceability codes and biohazard symbols. Medical-grade silicone automated dispensing reinforces the injection port, ensuring seal integrity per CLSI GP40-A standards.

Precision Cutting & Edge Finishing：CNC cutting machines tailor bags to preset sizes (50ml/100ml/500ml). Ultrasonic edge sealing eliminates burrs to prevent sample contamination.

In-Line Inspection & Performance Testing：100% of products undergo leak testing (0.5Bar pressure retention), cryogenic cycling (-80°C↔25°C, 5 cycles), and microbial barrier tests to eliminate defective units.

Sterilization & Packaging：Gamma irradiation sterilization (25kGy dose) followed by dual-layer vacuum packaging in sterile bags. Batch data is logged into a traceability system, and finished products are stored in a temperature-controlled (18-25°C), light-protected warehouse with a 5-year shelf life.