MPACK Self-Sealing Sterilization Pouches — Class 4 Dual Indicator, 200 per Box

Self-sealing sterilization pouches with Class 4 internal and external process indicators, 200 pouches per box. Suitable for steam autoclave (121 °C / 134 °C) and ethylene oxide (EO) sterilization.

What does this pouch do?

It is a sterile barrier system with its own process monitoring built in. Each pouch carries two chemical indicators: an external indicator strip printed on the paper face, and an internal Class 4 indicator printed inside the pouch. Both change colour only when the sterilization parameters have been met, so a pouch that never reached temperature stays visibly unconverted and never reaches the shelf.

The intended use is the one the packaging standard describes: hold a cleaned and dried instrument set sterile from the end of the cycle to the point of use. The paper face is the sterile barrier that lets steam in and keeps microorganisms out; the film face keeps the contents dry and visible. Neither indicator proves sterility — that claim belongs to the biological indicator, run on the schedule your province sets.

• Class 4 dual indicator — an internal indicator and an external indicator strip on every pouch. Both change colour only when the sterilization parameters have actually been met, so a pouch that never reached temperature stays visibly unconverted.
• Self-sealing — fold-over adhesive strip, no heat sealer required. A perforated fold line keeps the pouch closed and gives a clean peel.
• Write-on area — each pouch carries a blank field for contents, date and operator.
• 60 gsm medical-grade paper + 52 µm CPP/PET film — the paper side lets steam and EO through; the film side keeps the contents sterile after the cycle.

What sizes are available, and which size fits which instrument set?

Seven sizes, all 200 pouches per box, all stated as usable interior width × length. Choose the smallest pouch that holds the set without the instruments touching the seal line, because a pouch that is over-filled closes on itself and blocks steam from reaching the folds.

Size stated is the usable interior width × length. The sealed flap adds roughly 30 mm to the overall length.

The selection rule that survives a busy week: measure the longest instrument, add the fold and the seal, and take the next size up rather than the size that only just fits.

When should I use a self-sealing pouch instead of a roll or wrap?

Use a pouch when the pack has a predictable size and you want the indicators already inside it: the pouch is the package and the internal Type 4 indicator in one step, with no sealer, no tape and no second label. Use a roll or sheet when the pack is longer or wider than any stocked pouch, when the set is heavy enough to need a two-layer wrap, or when the item has sharp edges that would puncture film.

Public Health Ontario's provincial reprocessing guidance requires an internal chemical indicator inside every package, placed in the area judged least accessible to the sterilizing agent; a printed internal indicator satisfies that requirement without a further consumable. That is the practical argument for pouches in a dental operatory: the compliance step is already inside the package.

Pouches are the wrong choice for a heavy cassette that will be handled repeatedly, and they are the wrong choice for an item that must be presented on a wrapped tray in the treatment room. The Class 4 self-sealing pouch range covers everything between those two ends.

What are the common sealing and loading errors that invalidate sterilization?

• Over-filling. Instruments pressed against the film create tension that opens the seal in the sterilizer, and a pouch that bulges cannot lie flat in the tray.
• Sealing over a crease or over the indicator. The adhesive strip needs a clean, dry, flat surface; a fold in the paper under the strip leaves a channel.
• Writing on the film instead of the write-on area. Marker on the film can be wiped off, and a pouch that cannot be traced to a load is not traceable after a recall.
• Loading face to face. Paper faces should face the same way, standing on edge and loosely packed, so steam and air can move between pouches.
• Re-processing a pouch that was opened and not used. A pouch whose seal has been opened is no longer a sterile barrier; it is repackaged, not resealed.
• Storing a warm pouch in a closed drawer. Condensation forms inside the film and wets the paper — the pack is then compromised even though the indicators changed.
• Reading the external strip only. The external indicator shows exposure; the internal Class 4 indicator is the one printed at the point judged least accessible to steam.

What standards does it meet?

Manufactured to ISO 11607-1:2019 (packaging for terminally sterilized medical devices — materials, sterile barrier systems and packaging systems; second edition, published 31 January 2019 and confirmed in July 2024), and to the EN 868 series for packaging materials. The indicators are Class 4 chemical indicators under ISO 11140-1:2014, which is the standard that defines what a chemical indicator is, the six classes, and the test methods behind them; Class 4 means an indicator that responds to two or more critical variables rather than to temperature alone. Made in China.

The pouch itself is cleared by the manufacturer under FDA 510(k) K071886. Canadian reprocessing practice for the clinic using it is set by CSA Z314:23, the current edition of the national sterilization standard, applied in Ontario through Public Health Ontario's PIDAC-IPC guidance.

How should these pouches be stored?

In a clean, dry, dust-free area, on closed shelving, off the floor, away from window sills and sinks, and away from direct sunlight. Canadian guidance for sterile storage gives the environmental envelope: temperature maintained between 18 and 23 °C and relative humidity between 30% and 60%, with humidity monitored — the same PIDAC-IPC section notes that humidity above 70% can leave packages damp enough to require reprocessing.

Shelf life is event-related rather than time-related in that guidance: a pouch that has been correctly processed, stored and handled remains sterile until its integrity is compromised — opened, wet, torn, punctured or crushed. So the date on the pouch is a traceability element, not a countdown, and the practical rule is to inspect the pack before use and reprocess anything that is damp, damaged or unlabelled. Pouches can stay in their dispenser box until use, but that carton is not a storage container: Public Health Ontario requires storage containers to be moisture-resistant and cleanable, and states that cardboard boxes must not be used. Do not use if the pouch is damaged or the seal has been opened, and do not re-use it.

Who manufactures and distributes it?

Manufactured by
Shanghai Jianzhong Medical Packaging Co., Ltd.
Bldg 16, #789 Puxing Road, Minhang District, Shanghai 201114, China
FDA 510(k) K071886 · FDA Establishment Registration on file

Distributed by
CliniEco Medical — Ecology Source New Energy Technology Co., Ltd.
255 Duncan Mill Road, Suite 512, Toronto, ON M3B 3H9, Canada
Canadian MDEL #35334

CliniEco Medical distributes this product as an authorised distributor. The product is manufactured and labelled by Shanghai Jianzhong Medical Packaging Co., Ltd.; the 510(k) clearance and FDA establishment registration are held by the manufacturer.

For clinics that buy by the case and need the load record to match the packaging, the autoclave monitoring and spore testing range sits alongside this product, and the compliance log centre carries the printable load sheets those records go on.