Pouch with Breakable Seal A Wipe That Mixes Its Own Liquid at the Moment of Use

This patent describes a two-compartment pouch holding a dry wipe on one side and a liquid on the other, separated by a seal that is broken when the wipe is needed. It is aimed at deactivating hazardous drug residue on cleanroom surfaces. It comes from Veltek Associates, Inc., a Pennsylvania contamination control specialist.

The Problem

Pharmacies and manufacturing suites that handle cytotoxic drugs, such as the compounds used in chemotherapy, face a contamination problem that ordinary cleaning does not solve. Traces of these drugs settle on work surfaces inside the cleanroom, and simply wiping them spreads them around. They need to be chemically deactivated, which means applying a specific liquid deactivating agent to the surface.

Pre-wetted wipes are the obvious answer, and they have a well-known flaw: the moment a wipe is soaked at the factory, the clock starts. The active chemistry begins to degrade, the liquid can evaporate through the packaging over a long shelf life, and the concentration that reaches the surface is no longer the concentration that was specified. Keeping the liquid separate in a bottle solves the chemistry problem but reintroduces others, since it means bringing an extra container into the cleanroom, pouring or spraying, and risking spills and dosing that varies with whoever is doing the wiping.

What This Invention Does

The wipe kit puts both components in a single pouch but keeps them apart until the last moment. The pouch has a first compartment with a one-way valve at one end, a second compartment holding a dry wipe, and a frangible seal between the two. Liquid is introduced into the first compartment through the one-way valve, which lets it in but not back out.

When the wipe is needed, the frangible seal is broken, which lets the liquid flow from the first compartment onto the dry wipe in the second. The wipe is wetted at the point of use with a measured amount of liquid that has been sitting in its own sealed compartment rather than in contact with the fabric. The kit is described for use in a clean room to deactivate most hazardous drugs on a work surface. The practical gains are consistency, since each pouch carries the same volume, and shelf life, since the liquid is not slowly reacting with or evaporating out of a saturated wipe. There is also no separate bottle to carry in, and nothing to pour.

Key Features

• Two-compartment pouch. One compartment holds liquid, the other holds a dry wipe, within a single package.
• One-way valve. The first compartment is filled with liquid through a valve that prevents it flowing back out.
• Frangible seal. A breakable seal separates the compartments until the user chooses to release the liquid.
• Point-of-use wetting. Breaking the seal wets the wipe immediately before use rather than at manufacture.
• Dry storage of the wipe. The wipe stays dry in storage, avoiding the degradation associated with pre-wetted products.
• Cleanroom deactivation use. The kit is intended for deactivating most hazardous drugs on cleanroom work surfaces.

Who Is Behind It

The applicant is Veltek Associates, Inc. of Malvern, Pennsylvania, which has spent more than 35 years supplying contamination control products to pharmaceutical and biotechnology operations, including disinfectants, sporicides, wipes, garments, cleanroom documentation materials and monitoring services. The named inventors are Mark J. Compo and Michael Balestri. The application is a divisional of Australian application 2019343119, with priority from September 2018.

Why It Matters

Occupational exposure to cytotoxic drugs is a recognised hazard for pharmacists, nurses and manufacturing staff, and Australian hospitals and compounding pharmacies work to guidelines that require surfaces to be decontaminated rather than merely cleaned. Anything that makes that step more consistent has a direct safety payoff, because the failure mode with deactivation is invisible: a wipe carrying weakened chemistry looks exactly like one carrying fresh chemistry. The mix-at-use approach is a familiar idea in other fields, from two-part adhesives to medical flush kits, applied here to a setting where dose consistency genuinely matters.

Related Concepts

• Cleanroom – the controlled environment the kit is designed for.
• Cytotoxicity – the hazard class of the drugs being deactivated.
• Decontamination – the process the wipe performs.
• Check valve – the one-way valve principle used to fill the liquid compartment.
• Packaging and labelling – the wider field of the pouch design.
• Good manufacturing practice – the quality framework governing cleanroom procedures.

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AU 2026202037 was published in the Australian Official Journal of Patents on 2 April 2026 and is open for public inspection. Patent applications represent inventions that are sought to be protected and do not necessarily reflect commercially available products.