Labthink MFY-01 Negative-Pressure Seal Integrity Tester for Flexible Packaging

Overview

The Labthink MFY-01 Negative-Pressure Seal Integrity Tester is an engineered solution for quantitative evaluation of seal integrity in flexible packaging—particularly critical for pre-filled, liquid-containing pouches such as wet wipes, baby wipes, medical swabs, and topical pharmaceutical sachets. It operates on the principle of vacuum decay testing: a sealed package is placed inside a water-submerged vacuum chamber; upon application of controlled negative pressure, any breach in the seal or body of the package manifests as visible air leakage (bubbles) or loss of vacuum stability. This method conforms to the fundamental physics of gas permeation under differential pressure and provides direct visual and functional validation of package hermeticity—distinct from indirect methods like dye penetration or burst testing.

Key Features

• Compliant with internationally recognized standards including GB/T 15171–1994 “Test Method for Seal Integrity of Flexible Package”, ASTM D3078–2021 “Standard Test Method for Determination of Leaks in Flexible Packaging by Bubble Emission”, and aligned with ISO 11607-2 requirements for packaging validation in medical device applications.
• Class 1 vacuum accuracy (per JJG 520–2019) ensures reproducible test conditions across laboratories and production shifts—essential for method transfer and regulatory audit readiness.
• Modular vacuum chamber design supports three standardized dimensions (Φ270 × 210 mm, Φ360 × 585 mm, Φ460 × 330 mm), enabling scalable evaluation of small sachets through large multi-compartment pouches; custom chambers available per user-defined geometry and volume requirements.
• Integrated digital vacuum control with real-time pressure monitoring and programmable hold time (0–999 s), allowing precise adherence to test protocols specified in quality agreements or internal SOPs.
• Stainless steel vacuum vessel with tempered glass viewport and IP65-rated electrical enclosure—designed for sustained operation in QC labs, packaging development centers, and GMP-compliant manufacturing environments.

Sample Compatibility & Compliance

The MFY-01 accommodates a broad spectrum of flexible packaging formats: laminated plastic pouches (e.g., PET/AL/PE, PET/PE), aluminum foil composites, Tyvek®-based medical pouches, and peelable lidding systems. It is routinely deployed in validation studies supporting FDA 21 CFR Part 11-compliant documentation workflows when integrated with Labthink’s optional data logging software. The instrument meets GLP/GMP environmental controls for equipment qualification (IQ/OQ/PQ), and its test outputs are admissible in QS certification audits for food packaging, as stipulated by China’s SAMR regulations. For pharmaceutical applications, it supports Annex 1 and USP guidance on container closure integrity testing (CCIT) when used as a deterministic, non-destructive screening tool prior to probabilistic methods.

Software & Data Management

When paired with Labthink’s proprietary SealTest™ software (optional), the MFY-01 enables automated test sequence execution, timestamped video capture of bubble emission events, and export of CSV-formatted reports containing vacuum setpoint, actual pressure curve, hold duration, pass/fail status, operator ID, and environmental temperature/humidity metadata. All data entries include electronic signatures and full audit trail functionality compliant with 21 CFR Part 11 requirements—including user access levels, change history, and immutable record retention. Raw pressure logs can be imported into LIMS or ELN platforms via standard OPC UA or Modbus TCP interfaces.

Applications

• Verification of heat-seal process parameters (temperature, dwell time, pressure) during packaging line setup and routine maintenance.
• Post-distribution simulation testing: evaluating seal resilience after ISTA 2A/3A transport simulations, drop tests (per ASTM D5276), or compression load exposure.
• Root cause analysis of field complaints related to product drying, microbial ingress, or oxidation—correlating seal defects with specific packaging material lots or sealing equipment settings.
• Supporting packaging validation protocols required under ISO 13485 for sterile barrier systems and under ICH Q5C for biologics primary packaging stability studies.
• Training and proficiency testing for packaging technicians and QA auditors in regulated industries.

FAQ

What vacuum level is required to meet GB/T 15171 compliance?

GB/T 15171 specifies a minimum vacuum of –80 kPa for most wet wipe pouches; the MFY-01 achieves up to –90 kPa to accommodate margin-of-safety requirements and thicker multilayer structures.
Can the instrument detect micro-leaks smaller than 50 µm?

Bubble emission detection is limited by visual resolution and water surface tension; for sub-50 µm leak quantification, complementary methods such as helium mass spectrometry or laser-based headspace analysis are recommended.
Is compressed air supply included with the system?

No—the MFY-01 requires an external clean, dry, oil-free air source delivering 0.7 MPa at ≥10 L/min; users must provide an ISO 8573-1 Class 2 compressed air system.
Does the tester support automated pass/fail decision logic?

Yes—SealTest™ software allows configurable thresholds for maximum allowable pressure rise rate (kPa/s) and bubble count per unit area, enabling objective go/no-go determinations without subjective interpretation.
How often does the vacuum chamber require calibration?

Annual calibration of the vacuum transducer against a NIST-traceable reference standard is recommended; Labthink provides certified calibration certificates and on-site service options globally.