Container Desiccant Dry Bag

Container Desiccant Hanging Strips

Container Desiccant Hanging Strips are high-capacity cargo dehumidification systems specially designed to eliminate transit condensation, commonly referred to as "Container Rain" and "Cargo Sweat," during multimodal and ocean freight transit. Unlike traditional silica gel or clay desiccants that cap out at 25%–35% sorption capacity, these hanging strips utilize active anhydrous or dihydrate Calcium Chloride (CaCl₂) blended with a high-purity modified starch gelling agent. This reactive matrix achieves an absorption capacity exceeding 300% of its dry weight.

Designed for vertical installation along shipping container walls, each hanging strip consists of multiple individually sealed pockets that distribute the active desiccant evenly across the container height. As water vapor enters through the breathable, liquid-impermeable membrane, hygroscopic calcium chloride extracts ambient moisture and initiates an irreversible three-phase encapsulation process, converting liquid brine into a leak-proof viscoelastic gel. Even under extreme temperature shifts, vessel vibration, and high ambient humidity, the entrapped gel will not weep, leak, or release moisture back into the cargo environment.

The product is 100% free of Dimethyl Fumarate (DMF), non-toxic, and compliant with EU REACH, RoHS 3, and US FDA indirect food-contact guidelines.

Hanging Strip Structure & Chemical Architecture

Key Features & Benefits of Hanging Strips

• Bilayer Barrier Containment: The front face of each hanging strip pocket is fabricated from medical-grade DuPont™ Tyvek® or high-density microporous membrane. It allows rapid water vapor ingress while providing a barrier against liquid-phase leakage. The back face consists of a tear-resistant, co-extruded polyethylene (PE) backing film that isolates moisture from container walls and prevents friction abrasion during sea swell.
• Irreversible Gel Locking Matrix: High-purity Calcium Chloride (CaCl₂ ≥ 74%) draws vapor out of the container airspace. Once liquefied, the salt brine is bound by modified food-grade starch polymers, locking captured moisture into a rigid gel matrix that prevents re-evaporation even when daytime container temperatures reach 60°C–70°C.
• Multi-Chamber Vertical Isolation: Hanging strips are divided into hermetically sealed individual compartments. This segmented construction prevents the desiccant from slumping to the bottom, maintains consistent exposed surface area across the container wall height, and eliminates seam stress caused by hydrostatic head pressure.
• Heavy-Duty Suspension Engineering: Equipped with a shatterproof, heavy-duty polypropylene (PP) hanging hook designed to fit standard internal container lashing rings and corrugated ribs. The vertical hanging arrangement helps maximize available cargo space.
• High Moisture Absorption Capacity: The calcium chloride and modified starch combination provides moisture absorption exceeding 300% of the original dry weight under high-humidity conditions.
• Suitable for Ocean Freight: Designed to help protect moisture-sensitive cargo during long-distance shipping, multimodal transportation, and changing environmental conditions.

Technical Data Sheet (TDS)

1. Chemical & Physical Baseline Specifications

2. Moisture Absorption Kinetics (Equilibrium at 30°C)

Hanging Strip Product Formats & Dimensions

Container Desiccant Hanging Strips are available in multiple configurations with different pocket counts and absorption capacities. Their vertical multi-pocket design allows convenient installation along standard shipping container corrugation walls and ceiling lashing points.

Installation & Application

• Hang the desiccant strip vertically using the integrated heavy-duty PP hook.
• Position the strip along the internal container corrugation walls or suitable lashing points.
• Ensure the hanging strip remains unobstructed to allow adequate airflow around the breathable membrane.
• Use the appropriate strip configuration according to container size, cargo type, humidity exposure, and transit duration.
• Keep the hanging strip away from sharp edges and avoid damaging its membrane or sealed compartments during installation.