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Denim is made from a tightly woven twill in which the weft passes under two or more warp threads. Denim is an indigo-dyed cotton twill fabric in which the weft passes under two or more warp yarns.
Physical properties of warp yarn are improved by incorporating oligomer resin into the yarn interior at the size box. These improvements yield benefits at each step of the fabric formation process from size box to the woven greige fabric. Warp sizing technology has been in a period of stagnation following the introduction of synthetic polymers into size formulations nearly 60 years ago. As noted in the following “Warp Sizing: A Brief History”, abrasion-resistant surface barriers may have reached optimum performance in sizing.
Higher quality yarn improves the weaving process. Introduction of very small non-film forming resin particles in conventional size formulations modify and provide improved fiber cohesion in the warp yarn bundle. This transient effect provides a more compact and improved yarn substrate to host conventional warp size polymers on the yarn surface. Evaluation of this technology in producing mills has provided positive results in all factors associated in the weaving process.
Word “denim” comes from fabric “serge de Nimes” made in France city of Nimes from where it originates. It has been used in America since the late 18th century, colored blue with indigo dye to make blue “jeans”, a type of cotton pants.
Fabric air permeability is a measure to what extent it gives air passing through the fabric. The porosity of fabric is the demonstration of the air gap as a percentage within the fabric. It has been important for especially the tent fabric and parachute.
The effect of shed geometry has been studied on a loom under the combination of weaving conditions that give the best cover and least stress on loom and warp yarns determined.
Generally, a set number of yarns are used for the formation of fabrics. Also, a number of techniques are used for producing fabrics such as weaving, knitting, and felting. The type of fabrics varies by the fibers, the fabric formation techniques, machinery used for producing them, and finishing techniques. Fabrics also made differently based on the end-usage.
Warp sizing is the process of giving a protective coating on the warp yarn to minimize yarn breakages during weaving operation.
A guide to calculations relating to yarn and cloth and all processes of weaving.It includes reed count, reed width, Maximum EPI for a particular count, weave density, crimp percentage, cloth cover factor etc.
Major weaving patterns such as plain, twill, satin, Dobby, Jacquard, Pique, Pile, its characteristics, usages and techniques.