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A garment described as waterproof will have a water-repellent coating, with the seams also taped to prevent water ingress there. Better waterproof garments have a membrane lining designed to keep water out but allow trapped moisture to escape ("breathability")—a totally waterproof garment would retain body sweat and become clammy. Waterproof ...
Seam sealants are sprayed or extruded over the joined edges of these overlaps, and they then either cure to a flexible waterproof "seal" by drying (dehydrating) in the case of water borne compositions, or thermoset irreversibly to a flexible adherent seam seal by going through an oven bake in the case of plasticized polyvinylchloride compositions.
Drop of water on 100% polyester textile. Waterproof/breathable fabrics resist liquid water passing through, but allow water vapour to pass through. Their ability to block out rain and snow while allowing vapour from sweat to evaporate leads to their use in rainwear, waterproof outdoor sports clothing, tents, and other applications.
A rubber- or PVC-coated reverse zipper is called a waterproof zipper. Metal zippers are the classic zipper type, found mostly in jeans and pencil cases today. The teeth are not a coil, but are instead individual pieces of metal molded into shape and set on the zipper tape at regular intervals. Metal zippers are made with brass, aluminium and ...
Seam allowance (sometimes called inlays) is the area between the fabric edge and the stitching line on two (or more) pieces of material being sewn together. Seam allowances can range from 1 ⁄ 4 inch (6.4 mm) wide to as much as several inches. [1] Commercial patterns for home sewers have seam allowances ranging from 1 ⁄ 4 to 5 ⁄ 8 inch (6. ...
Durable water repellents are commonly used in conjunction with waterproof breathable fabrics such as Gore-Tex to prevent the outer layer of fabric from becoming saturated with water. This saturation, called 'wetting out,' can reduce the garment's breathability (moisture transport through the breathable membrane) and let water through.
A plain seam is the most common type of machine-sewn seam. It joins two pieces of fabric together face-to-face by sewing through both pieces, leaving a seam allowance with raw edges inside the work. The seam allowance usually requires some sort of seam finish, usually an overlock in ready to wear or bias tape in couture sewing, to prevent ...
Plain seam A seam or seamline in sewing is the line where two pieces of fabric are held together by thread. seam allowance A seam allowance is the area between the edge of fabric and the stitching line on two (or more) pieces of material being stitched together. Seam allowances can range from 1/4 inch wide (6.35 mm) to as much as several inches.