Abstract: An air permeable cap for a vehicle may include: a cover part formed in a cylindrical shape with a closed end part, and having a plurality of guide ribs radially formed on an inner circumferential surface thereof; a foam part inserted and installed in the cover part so as to be contacted with the guide ribs, and having a ventilation hole formed on one side thereof; a membrane part installed between the foam part and the cover part, and configured to block a flow of water through the ventilation hole and allow a flow of air through the ventilation hole; and an adhesion retention part coupled in a concave-convex shape to retain an adhesion force between the foam part and the cover part.

Abstract: Provided is a ventilation member for a vehicle lamp. The ventilation member includes a nanofiber membrane, a composite adhesive layer stacked on one surface of the nanofiber membrane, and a ventilation structure provided in a central portion of the composite adhesive layer and in contact with the nanofiber membrane. The composite adhesive layer includes an acrylic adhesive layer in contact with the nanofiber membrane and a silicone-based adhesive layer provided on one surface of the acrylic adhesive layer. The acrylic adhesive layer is in contact with the nanofiber membrane, the acrylic adhesive layer is infiltrated into the nanofiber membrane to a depth of 30 ?m or more. The ventilation member for a vehicle lamp has a water pressure resistance of 1.0 bar or more.

Abstract: An air permeable cap for a vehicle may include: a cover part formed in a cylindrical shape with a closed end part, and having a plurality of guide ribs radially formed on an inner circumferential surface thereof; a foam part inserted and installed in the cover part so as to be contacted with the guide ribs, and having a ventilation hole formed on one side thereof; a membrane part installed between the foam part and the cover part, and configured to block a flow of water through the ventilation hole and allow a flow of air through the ventilation hole; and an adhesion retention part coupled in a concave-convex shape to retain an adhesion force between the foam part and the cover part.