{"id":10187,"date":"2026-08-21T08:00:56","date_gmt":"2026-08-20T23:00:56","guid":{"rendered":"https:\/\/www.dry-fog.com\/en\/?post_type=technical-report&p=10187"},"modified":"2026-08-21T22:27:17","modified_gmt":"2026-08-21T13:27:17","slug":"hum-tex-005","status":"publish","type":"technical-report","link":"https:\/\/www.dry-fog.com\/en\/projects-technology\/technical-report\/hum-tex-005\/","title":{"rendered":"Low Humidity, High Downtime: Humidity in Hygiene Product Manufacturing"},"content":{"rendered":"
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Intro<\/h3>\n<\/div>\n

When a diaper or feminine hygiene converting line starts jamming more frequently, the first reaction is usually to check the machine: tension, rollers, sensors, alignment, or feed settings. But sometimes the machine hasn’t changed at all. The material has.<\/p>\n

Nonwoven fabrics, absorbent cores, and cotton-like materials are layered, folded, and fed through high-speed machinery designed around a specific set of material properties. Most of those properties assume the material behaves the way it did when it was engineered and tested, under a given range of humidity. When ambient conditions drift outside that range, the materials themselves change shape, stiffness, and feed behavior before anyone touches a single machine setting.\n<\/p>\n

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Dry Air Changes the Materials, Not Just the Room<\/h3>\n<\/div>\n

Nonwovens and cotton-like fibers are hygroscopic. They hold a measurable amount of moisture at equilibrium with the surrounding air, and that moisture content affects flexibility, thickness, and how the material lies flat as it moves through rollers and feed mechanisms. Ambient humidity can drop for a number of reasons: dry climates, heated makeup air, or facilities that recirculate air from dust collection systems designed for particulate control rather than material moisture content. Any of these can pull relative humidity down into a range the material was never engineered to run at.<\/p>\n

As relative humidity drops, hygroscopic materials lose moisture to the air around them. Fibers that were designed to lie flat and thin become stiffer and effectively thicker, since without moisture to help them compress and conform, the fiber structure holds more open space. When that altered material meets a feed mechanism calibrated for a specific thickness and flexibility, it does not pass through cleanly.<\/p>\n

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Where the Line Actually Fails<\/h3>\n<\/div>\n

This shows up most visibly at the point where nonwoven fabric and cotton-like absorbent material are layered together and fed into the machine. A material that is measurably thicker or stiffer than spec tends to catch, bunch, or misalign as it enters the feed path, triggering a jam and stopping the line. Each stoppage requires an operator to clear the jam, reset the feed, and restart production, typically costing several minutes per incident. On a high-speed converting line, that adds up quickly across a shift, and the frustrating part is that the root cause often has nothing to do with the equipment itself. Maintenance teams can spend hours troubleshooting feed mechanisms, sensors, and tension settings without resolving anything, because the variable that actually changed was the moisture content of the material.<\/p>\n

Because these jam events are easy to attribute to equipment wear or feed calibration, the humidity connection often goes untested. Facilities frequently do not track jam frequency granularly enough, or log it against humidity data, to see the pattern clearly.<\/p>\n

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Why a Full HVAC Overhaul Is Rarely the Right Answer<\/h3>\n<\/div>\n

The instinct when facing a humidity-related production problem is to look at the HVAC system. In practice, retrofitting or upgrading building-wide climate control to add humidification capacity is a major capital project, one that many facilities cannot justify or schedule around continuous production. It also tends to be overbuilt for the actual need. What a converting line requires is not a change to the whole building’s comfort conditions, it is a controlled, localized increase in relative humidity at the process itself, ideally without introducing surface moisture that could affect absorbency or bonding elsewhere in the product.<\/p>\n

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A Targeted Approach: Dry Fog Humidification<\/h3>\n<\/div>\n

This is where Dry Fog Humidification fits the problem more precisely than a facility-wide HVAC investment. AKIMist\u00aeE uses two-fluid nozzle technology to atomize water into a fog of extremely fine droplets, sauter mean droplet size of 7.5\u00b5m, that evaporate into the air before settling on surfaces or product. Because the droplets are so fine, the system raises ambient relative humidity without wetting the nonwoven fabric, the absorbent core, or the machinery, which matters in an application where the product must maintain precise absorbency and bonding characteristics.<\/p>\n

By restoring relative humidity to a target range appropriate for the materials in use, hygroscopic fibers regain the moisture content they were engineered around, and feed behavior returns to spec. Facilities that have addressed this variable directly have seen jam-related stoppages drop dramatically, without needing to touch the feed mechanism, the tension settings, or the HVAC infrastructure. It is worth noting that too much humidity carries its own risk in this application. Overshooting the target range can negatively affect absorbent material performance, so the goal is a controlled, monitored humidity band rather than simply adding as much moisture as possible.<\/p>\n

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The Takeaway<\/h3>\n<\/div>\n

Diaper and hygiene product manufacturing is a hygroscopic-material process running on high-speed equipment with tight tolerances. When jam frequency rises and no mechanical cause turns up, relative humidity is worth investigating before the feed mechanism. Addressing the air the material lives in, rather than retooling the machine that handles it, is often the more direct and less disruptive fix.<\/p>\n

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Access the Ikeuchi USA LinkedIn Newsletter Article Here:<\/h3>\n

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