72-Hour Factory
Acceptance Test

The 72-hour factory acceptance test is standard on every LayerQuestar machine — included in the machine price at no additional charge. It is not an optional add-on and it is not skipped for lower-priced configurations. Every machine that leaves our Zhejiang factory has completed a full 72-hour continuous run.

The standard FAT verifies film thickness tolerance to ±8% across all 20 measurement points using a 5-point cross-section method. This is consistent with the performance range of conventional blown film systems for general PE packaging applications.

If your application requires tighter tolerance — food packaging, medical film, or high-specification barrier structures — LayerQuestar offers optional automatic gauge control (AGC) systems. With AGC, thickness tolerance can be reduced to ±3%–±5% depending on configuration. Discuss your tolerance requirement with your sales contact before finalising the machine specification so the FAT pass standard can be set accordingly.

Yes. Buyers are welcome to attend the FAT at LayerQuestar's factory in Zhejiang, China. We ask for approximately 2–3 weeks advance notice to coordinate the visit with the production schedule. You can attend the full 72-hour run or arrive for the final inspection and sign-off — whichever is more practical for your travel schedule.

If travel is not possible, we offer a live video witness session via WhatsApp or WeChat. You observe the machine running, see thickness measurements taken on camera in real time, and receive the completed FAT report by email within 24 hours of sign-off.

Yes. You are welcome to arrange an independent inspection agency to attend the FAT on your behalf. We coordinate factory access and provide all test data directly to the inspector. The inspector's sign-off can be added to the FAT report before the machine is packed for shipment. Please coordinate the inspection agency visit at least 1–2 weeks in advance so we can align the schedule with the FAT completion date. [NEEDS CLIENT VERIFICATION — confirm full list of accepted agencies]

If any parameter falls outside the defined pass standard during the 72-hour run, the machine does not ship. The engineering team identifies the root cause, makes the necessary adjustment or repair, and the test restarts from zero. The 72-hour clock does not resume from where it stopped — it restarts completely. The machine is only released for shipment after a complete, uninterrupted 72-hour run in which all five verification areas meet their pass standards.

The standard FAT uses LDPE or HDPE depending on the machine configuration, run at a standard film thickness. This is sufficient to verify machine integrity, temperature stability, output consistency and all mechanical and electrical systems.

If your application uses a specific resin formula — a particular melt index grade, a recycled content blend, or a material with a narrow processing window — contact us before the FAT. We can discuss running a material trial with your parameters, either as part of the FAT or as a separate session. This is particularly relevant for PLA/PBAT biodegradable blends, which require a dedicated machine configuration and cannot be run on a standard PE machine.

Yes. A completed FAT report is included in the machine documentation package shipped with the machine. A digital PDF copy is available on request. The report contains the machine model and serial number, test start and end timestamps, temperature logs for all zones across the full 72-hour duration, all 20 film thickness measurement values, hourly output weight records, motor amperage readings, gearbox oil temperature readings, the electrical systems checklist, and the LayerQuestar engineer's sign-off.

The FAT report is an internal quality record documenting machine performance at the time of test. Machine warranty terms are defined separately in the purchase agreement.

After FAT sign-off, the machine is disassembled, protectively packed and prepared for shipment. This process typically takes 3–5 business days depending on machine size and packaging requirements. Your sales contact will confirm the exact shipping date and provide a bill of lading and tracking number once the machine has been handed to the freight forwarder.