How can Waterproof PVC Fabric have a certain degree of breathability while being waterproof?

Achieving a balance between waterproofing and breathability in fabric can be challenging, but certain technologies and design considerations can help waterproof PVC fabric have a certain degree of breathability while maintaining its water resistance. Here are some ways this balance can be achieved:

Micro-Perforations: Some waterproof PVC fabrics incorporate micro-perforations or tiny holes in the fabric surface. These holes are small enough to prevent water droplets from passing through but allow for limited air circulation, enhancing breathability.

Engineered Patterns: Designing specific patterns or textures in the fabric can create channels or pathways for air to move through. These patterns can be strategically placed to maintain water resistance while allowing some ventilation.

Laminated Membranes: Some waterproof PVC fabrics use laminated membranes that consist of multiple layers. These layers can include a waterproof PVC layer and a breathable membrane layer (such as ePTFE or PU). These breathable membranes allow water vapor (moisture) to escape while preventing liquid water from entering.

Breathable Coatings: Certain breathable coatings can be applied to the inner side of the fabric. These coatings allow moisture vapor to pass through while maintaining waterproofness.

Hybrid Fabrics: Some fabrics combine waterproof materials with breathable ones, creating a hybrid fabric that provides both protection against water and enhanced breathability.

Moisture-Wicking Linings: Waterproof PVC fabric products like jackets can incorporate moisture-wicking linings that help move moisture away from the body, improving comfort.

Strategic Ventilation: Garments or products made from waterproof PVC fabric can include strategically placed ventilation openings, zippers, or mesh panels to allow air circulation in specific areas.

Breathable Seams: The design of seams can impact overall breathability. Taped or welded seams, commonly used in waterproof clothing, can help maintain water resistance while allowing some air movement.