Desiccant Packs Suppliers

A Desiccant Range for Container, Storage and Product Protection

Each desiccant family is formulated for a specific humidity environment and application need. The range covers short-cycle shipments, long-duration ocean freight and sensitive product packaging, with absorption performance, material safety and end-of-life handling treated as separate selection criteria.

Matching Chemistry to the Cargo and the Voyage

Container condensation is a temperature-driven problem. A steel container moving from a warm, humid port into a cold climate sheds moisture on the inner walls and roof; the same container moving the other way drives moisture into the cargo. Desiccant selection therefore depends on the voyage profile as much as on the product label.

• Container size and load pattern — a 40 ft container presents roughly twice the air volume of a 20 ft unit, and floor-loaded cargo leaves different air paths than a fully palletized load.
• Voyage duration and route — short sea legs and intercontinental crossings carry different total moisture loads.
• Cargo behaviour — metals, electronics, powders, food, textiles and paper respond differently to a given relative humidity.
• Packaging barrier — stretch film, barrier liners and sealed cartons slow moisture exchange and change the required unit count.
• Ambient profile — temperature swing and port humidity determine how much condensation the desiccant must buffer.
• Target humidity — the acceptable relative humidity for the cargo sets the performance threshold.

Placement, Loading Integration and the Wider Protection System

Desiccants work as part of a loading plan, not as a standalone item. We position container desiccants where air movement reaches them — along the container walls, above the cargo or on hanging rails — and coordinate that placement with the rest of the protection system. Dunnage bags fill voids and stop load shift; paper corner protectors take the edge loads; slip sheets and stretch film unitize the pallet. When these elements are planned together, the desiccant is not compensating for a loose or poorly protected load.

Our Dunnage Bag range and Stretch Film range are specified in the same loading review as the desiccant, so the moisture-control unit count and the void-fill or unitization plan stay aligned.

Critical Specifications We Confirm Before Production

• Unit mass and absorption capacity — the gram weight of active material and the absorption figure the unit is expected to deliver under the agreed test conditions.
• Outer material and closure — the sachet or bag substrate, seam strength and closure method that keep the active material contained through handling and transit.
• Format — sachet, bag, blanket, hook-mounted or pole-mounted unit, depending on container size and loading method.
• Printing and identification — brand, batch, warning text and language set for the destination market.
• Quantity per container and per pallet — the unit count that matches the moisture load and the loading pattern.
• Shelf life and storage — the conditions under which the desiccant keeps its rated performance before use.
• Acceptance criteria — the test method and pass/fail threshold agreed for the order.

Configuration Options and OEM / ODM Support

We support OEM and ODM customization across the desiccant range. Size, gram weight, outer material, closure, printing and packing format can be adapted to a customer's brand and application. Our engineering team develops from drawings or samples, and we provide product design and packaging solution planning based on cargo type, loading method, load requirements, budget and printing needs. Minimum order quantity starts at 100 pieces, which allows trial orders and market tests before volume production.

Quality Control and Acceptance Testing

Quality control follows the material from raw input to finished unit. Our management system is ISO 9001 certified, and we operate a three-tier verification approach: our own laboratory, advanced testing equipment and third-party institutions such as SGS and TUV. Desiccant performance, packaging integrity and print accuracy are checked against the confirmed specification before shipment. Test reports and inspection documents are prepared with the order so the receiving team can verify what arrived against what was agreed.

Information We Use to Configure Your Solution

Production Capacity, Delivery and Commercial Scope

Shanghai We Pack operates a 10,000 m² facility with 9 production lines and 120 employees, supported by dedicated R&D, testing and quality control teams. Annual output exceeds 20,000 tons across the group's packaging lines, which supports both trial quantities and repeat volume. The factory sits approximately 25–35 km from Shanghai Port and 30 km from Pudong International Airport, giving us short inland legs to export gateways. We work on EXW, FOB, CIF and DDP terms, with T/T and L/C payment structures for established programmes.

Desiccant shipments are packed for the destination market and can be combined with Paper Corner Protector and other transport protection items in the same container, reducing the number of inbound deliveries a receiving warehouse has to handle.

Frequently Asked Questions

Which desiccant types does Shanghai We Pack manufacture?

We supply silica gel, montmorillonite, calcium chloride and magnesium chloride desiccants. Each family is produced for a different moisture environment — from stable, reusable silica gel for electronics and general packaging to high-capacity calcium chloride for long ocean voyages and high-value container cargo.

How do you choose between the four desiccant chemistries?

The choice follows the cargo, the packaging barrier and the voyage. Silica gel suits a wide humidity range and sensitive goods; montmorillonite suits natural products, textiles and archival materials where a mineral, degradable desiccant is preferred; calcium chloride handles long-duration, high-capacity moisture control in containers; magnesium chloride provides fast uptake in solidified form for shorter cycles. We confirm the working point with the customer before production.

Can desiccants be customized with our brand, size and packaging?

Yes. We support OEM and ODM work on unit size, gram weight, outer material, closure, printing and packing format. Our engineering team can develop from drawings or samples, and we provide free packaging solution planning based on cargo type, loading method, load requirements, budget and printing needs.

What information do you need to prepare a desiccant quotation?

We need the container type and internal volume, cargo type and value, packaging barrier, voyage duration and route, temperature and humidity profile, loading method, target relative humidity, required unit format and printing, order quantity, delivery schedule, destination port and preferred trade term. With those inputs we can propose a chemistry, a unit format and a unit count.

How is desiccant quality controlled and documented?

Raw materials, active fill, outer material, seams and printing are checked through the production process. Our management system is ISO 9001 certified, and we use in-house laboratory testing plus third-party verification through institutions such as SGS and TUV. Test reports and inspection documents are prepared with the shipment.

What is the minimum order quantity and delivery scope?

Minimum order quantity starts at 100 pieces, which supports trial orders and market testing. We ship from Shanghai on EXW, FOB, CIF or DDP terms, with T/T and L/C payment options for long-term programmes.