PackDry™ – Breathable Laminate for Desiccant and Deodorant Packaging

Kae Hwa’s PackDry™, part of the FunPack series, is a high-performance breathable waterproof laminate specifically engineered for moisture absorbers and air-purifying packs. By precisely balancing controlled vapor transmission with absolute liquid and powder barrier properties, PackDry™ ensures maximum absorption efficiency while preventing chemical leaks, making it the trusted choice for global functional packaging manufacturers.

 Lightweight
 Breathable
 Waterproof

PackDry™ — Breathable Film for Desiccant & Deodorant Packs The Ultimate Barrier for Moisture and Odor Control

In the functional packaging industry, the material enclosing the active ingredients is just as critical as the ingredients themselves. Desiccants, silica gels, and activated carbon require a delicate balance: they must breathe to absorb moisture and odors, but they must never leak liquids or sift chemical powders. PackDry™ provides a proven material solution to these exact pain points. Utilizing advanced microporous film technology laminated with high-strength nonwoven, PackDry™ acts as a dynamic one-way valve. It allows humidity and airflow to pass through seamlessly while creating an impenetrable shield against liquid water and fine particulate leakage.

Ideal Applications:

  • Silica gel and clay desiccant packs

  • Calcium chloride moisture absorbers (Dehumidifier bags)

  • Activated carbon deodorizing pouches

  • Mineral-based air purifying bags

  • Industrial and shipping dry packs

Core Advantages

The core of PackDry™ is a precision-engineered microporous membrane. Billions of microscopic pores are calibrated to allow water vapor to diffuse rapidly into the desiccant material. This optimized Moisture Vapor Transmission Rate (MVTR) maximizes the absorption speed and capacity of the active ingredients, extending the shelf life of the protected products.

When highly hygroscopic chemicals (like calcium chloride) absorb moisture, they often turn into a liquid gel. PackDry™ prevents this liquid from seeping backward and damaging the surrounding goods. Additionally, the tight microporous structure completely eliminates "powder sifting," ensuring that fine carbon dust or silica particles do not leak out of the pouch.

Efficiency on the production line is critical for packaging OEMs. PackDry™ is specifically designed for excellent processability. It offers a stable, clean surface that is highly compatible with both thermal sealing and ultrasonic welding equipment. This ensures secure, burst-resistant seams even during high-speed automated packaging, significantly reducing production defect rates.

Functional packs are often tossed into shipping containers, shoeboxes, or confined spaces where they face friction and pressure. The solvent-free lamination of the breathable film to a robust nonwoven substrate provides PackDry™ with exceptional tear and puncture resistance, guaranteeing stable packaging integrity throughout its lifecycle.

Specification

Brand PackDry™ (FunPack Series)
Product Form Roll
Material Breathable Film + Nonwoven Fabric
Structure 2-Layer or 3-Layer Microporous Composite
Breathability Mechanism High Vapor Permeability (Customizable for absorption rates)
Barrier Properties 100% Liquid-proof, Anti-powder sifting, High Tear/Puncture Resistance, Thermal and Ultrasonic Sealable
Surface Treatment Smooth / Custom Printed (Brand logos/Warnings)
Weight 10 - 100 gsm
Overall Width 80 - 2000 mm (Customizable)
Length 2000 M
Application Desiccants, Dehumidifier packs, Deodorizing bags
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Redefining the Boundaries of Breathable Technology

Understanding Functional Packaging — The Benchmark for Sealing Control

In the production of desiccants and dehumidifiers, product failure usually occurs at the seams or due to liquid leakage after moisture absorption. A premium packaging material must not only breathe but also possess high seal strength. PackDry™ achieves this by utilizing specialized polymers that melt and bond uniformly under thermal or ultrasonic sealing, creating a secure, burst-resistant edge that ensures the chemicals inside never contaminate the external environment.

Why Global OEMs Choose Kae Hwa's FunPack Series

With over 60 years of polymer expertise, Kae Hwa Industrial is a trusted partner for global OEMs in the desiccant and functional packaging industries. Operating from ISO 9001 and ISO 14001 certified facilities in Taiwan and Malaysia, we deliver consistent, customizable materials. From adjusting vapor transmission rates to optimizing seal strength, our clean, solvent-free production processes ensure reliable, long-term performance in highly moisture-sensitive environments.
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FAQ

Many moisture absorbers (like calcium chloride) turn into a liquid brine after absorbing humidity. PackDry™ features a microporous film where the pores are large enough to let water vapor in, but much too small for liquid water to pass through, creating an absolute barrier that prevents reverse seepage and protects surrounding items.

Yes. Unlike standard woven fabrics or basic nonwovens that have large gaps, the microporous membrane in PackDry™ acts as a microscopic filter. It allows air and odors to flow into the activated carbon while completely blocking fine dust or chemical powders from sifting out (anti-sifting).

Absolutely. PackDry™ is engineered with excellent processability. Its structured laminate design provides the mechanical stability required for high-speed unwinding, and it is highly compatible with both thermal sealing and ultrasonic welding, ensuring strong, burst-proof seams.