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
Functional Breathable Packaging Material

PackDry™

Breathable Barrier Material for Desiccant & Dehumidifier Packaging

PackDry breathable barrier material for desiccant packaging

PackDry™ is a breathable functional packaging material developed for desiccant packs, moisture absorbers, dehumidifier bags, and other moisture-control products.

Its engineered breathable structure allows environmental moisture vapor to enter the package and reach the absorbent material inside, while helping contain liquid, powder, and reaction residue after moisture absorption.

Designed for reliable sealing and efficient converting, PackDry™ can be supplied for different packaging formats ranging from small desiccant sachets to household dehumidifier bags and container moisture-control systems.

Controlled Moisture Intake Leak Resistant Seal-Friendly

Engineered for Moisture Intake Without Package Leakage

Desiccant packaging must perform two opposite functions at the same time: moisture needs to pass through the package so the absorbent can work, but the desiccant, absorbed liquid, and internal residue must remain securely contained. PackDry™ is engineered to balance these requirements through controlled permeability, barrier performance, and stable sealing.

Controlled Vapor Intake

Allows environmental moisture vapor to reach the desiccant and support effective moisture absorption.

Leak & Powder Containment

Helps reduce seepage of absorbed liquid, powder, and internal residue through the packaging material.

Reliable Sealing

Designed for secure package edges and compatibility with common thermal or ultrasonic sealing processes.

Stable Converting

Provides controlled material handling, cutting, filling, and sealing performance for production lines.

Core Advantages

Breathable Microporous Structure Engineered vapor pathways allow humidity to reach the absorbent material without leaving the package fully open to the environment.
Liquid Resistance The functional membrane helps contain absorbed moisture and internal liquid generated during the service life of the desiccant.
Mechanical Durability Laminated structures can provide improved tear, puncture, and handling resistance during filling, logistics, and storage.
Printable Surface Nonwoven surfaces can support branding, product instructions, warning information, and customized packaging graphics.

How PackDry™ Works

PackDry™ creates a controlled interface between ambient humidity and the moisture-absorbing material inside the package.

1

Ambient Humidity Reaches the Package

Moisture vapor in the surrounding environment contacts the breathable packaging surface.

2

Vapor Passes Through the Barrier

Controlled breathable pathways allow moisture vapor to move toward the desiccant material inside.

3

Moisture Is Absorbed and Contained

The desiccant captures moisture while the packaging structure helps retain powder, liquid, and reaction residue.

PackDry™ Functional Principle

“Let humidity reach the desiccant while helping keep liquid and powder securely inside the package.”

Application Fit

Desiccant Packs Breathable sachet material for silica gel, clay, and similar moisture-absorbing products.
Dehumidifier Bags Suitable for hanging and household moisture absorbers requiring continuous humidity intake and containment.
Container Desiccants Functional packaging material for larger moisture-control packs used during logistics and container transportation.
Moisture-Sensitive Storage Breathable material solutions for moisture-control boxes, storage containers, and protective packaging systems.
Additional Applications
  • Calcium chloride moisture absorbers
  • Household dehumidifier boxes
  • Strip-type desiccant packs
  • Electronics moisture protection
  • Precision equipment packaging
  • Long-term storage systems

Material Construction

Outer Layer

Durable / Printable Nonwoven

Provides mechanical support, surface protection, printing capability, and packaging appearance.
Functional Layer

Breathable Microporous Membrane

Controls moisture-vapor intake while helping prevent internal liquid and powder leakage.

PackDry™ Applications

From small desiccant sachets to container-level moisture control, PackDry™ can be adapted to different packaging formats and absorption systems.

PackDry desiccant packaging applications including desiccant packs, dehumidifier bags, container desiccants and moisture-sensitive storage

Desiccant Packs

Compact breathable packaging for moisture absorbers used in products, boxes, and equipment packaging.

Dehumidifier Bags

Moisture-intake material for hanging bags and household humidity control.

Container Desiccants

Packaging designed for larger moisture absorbers used in logistics and shipping environments.

Moisture-Sensitive Storage

Breathable moisture-control structures for storage boxes and moisture-sensitive products.

Customizable for Your Packaging Process

PackDry™ can be engineered according to the desiccant chemistry, absorption behavior, package dimensions, converting process, and sealing requirements of each customer.

Controlled Vapor Permeability
Customized Basis Weight
Customized Width
Roll or Pre-Cut Format
Surface Printing
Thermal / Ultrasonic Sealing
Tear & Puncture Strength
Two- or Multi-Layer Structures
Packaging Surface Design

Specification

Brand PackDry™ (FunPack Series)
Product Form Roll
Material Breathable Film + Soft Nonwoven
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 1000 - 6000 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.

About Us
Engineering Reliable Protection Through Precision

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.