Smart door locks are demanding to pack for export. Front panels may be tempered glass or brushed metal, back panels are plastic, and inside are circuit boards, fingerprint sensors, and battery compartments. Traditional foam bags leave the panels moving in the carton, causing scratches and loose connections after ocean freight.

Why foam-in-place works

CosMolar foam expands around the front panel, back panel, lock body, and accessories, fixing each item in its own position. Nothing touches or rubs against anything else. The 6 kg/m3 soft foam cushions drops and protects circuit board solder joints from shock.

No mold is needed. Whether your lock is a slide cover, push-pull, or fully automatic model, foam conforms to the shape on the spot. It also adds a moisture barrier for electronics through humid tropical shipping routes.

How to pack

Spray a bottom cushion layer, place the front panel screen-up, arrange the lock body and accessories, spray foam on top, close the lid, and wait 3 to 5 seconds. One person handles one carton in 1 to 2 minutes. For small batches, hand-press foam bags work too.

Smart lock exporters switching to foam-in-place see panel scratch complaints drop sharply and damage rates fall below 0.5 percent. Contact CosMolar for free sample testing. Website: https://www.cosmolar.com/

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