DryCross waterproof phone bag submerged underwater for leakage and closure performance analysis
DryCross product or factory reference. Final specifications and evidence are confirmed for each order.

QUICK BUYER ANSWER

The practical answer

A failed bag should be treated as evidence, not only as a complaint count. Identify the model and batch, reproduce the use condition, locate the entry path, separate design from production and handling causes, and verify corrective action on representative samples before the next order.

Preserve the failed sample and context

Record order, batch, date, user instructions, contents, exposure, duration, closure procedure and photographs before cleaning or repair. Keep an unused control sample from the same lot if possible. A statement such as “it leaked” is not enough to distinguish closure misuse, puncture, seam failure or an incorrect performance claim.

Locate the actual water path

Use a method appropriate to the model and agreed claim. Inspect closure ends, fold path, welded intersections, stitched attachments, window edges, valve areas and abrasion points. Water observed at the bottom may have entered much higher, so avoid assuming the visible wet area is the original defect location.

Separate design, material and process causes

A geometry may concentrate stress; a material may crack, delaminate or vary; a weld may have contamination or inconsistent pressure; a zipper may be incorrectly installed; packing may crease a critical area. Classify the cause with evidence so the remedy addresses the mechanism instead of only increasing inspection.

Contain the current order

Identify affected quantities and whether the issue is isolated or systematic. Agree sorting, retesting, repair, replacement or shipment hold actions in writing. Define acceptance criteria and record results. Market or safety implications should be reviewed by qualified advisers where necessary.

Verify corrective action before reorder

Update the drawing, material, process setting, work instruction, inspection checkpoint or customer instruction that caused the issue. Test the corrected sample under the same condition that exposed the failure, then document the result and revision. Monitor the next production lot to confirm the action remains effective.

Use this table in supplier discussions

Review areaBuyer inputDecision
TraceabilityModel, order, batch and sampleDefines affected scope
ReproductionUse condition and closure methodConfirms the failure
Root causeDesign, material, process or handlingSelects corrective action
VerificationRetest and revised recordsProtects the next order

Information to include in your inquiry

  • Product type or reference model
  • Quantity by size, color and artwork
  • Intended use and required features
  • Destination and required delivery date
  • Sample, packing and evidence requirements

Frequently asked buyer questions

Does every leak mean the welded seam failed?

No. Water can enter through the closure, attachments, punctures, windows, valves or incorrect operation. Locate the path before deciding the cause.

Should final inspection test every bag?

Inspection scope depends on risk, process and agreement. Combine process controls, sampling and any required performance tests rather than relying on appearance alone.

DRYCROSS · DONGGUAN, CHINA

Turn the checklist into a project brief

Send the reference model, quantity, destination and requirements that matter to your customer. DryCross will review the scope before confirming a quotation.

Discuss this sourcing project

Factory capabilities · Customization · Contact DryCross