Unit 3 Lecture 19 Topic 1 Flashcards
What are the three basic weaves of woven fabrics?
Plain, twill, and satin.
Interstices:
The openings (gaps) between yarns.
What is the effect on breaking strength when interlacing warp and weft yarns?
With more interlacements there is more tensile strength because breaking forces are shared between yarns at the intersection points.
What is the effect of fabric count on breaking strength in basic weaves?
Twills and satins have fewer interlacements so their yarns pack more closely and have a higher fabric count. Higher fabric count (for same yarn size) creates a greater tensile (breaking) strength.
What is the effect of fabric count on tearing resistance of basic weaves?
Plain weaves have a higher count which means there is lower tear strength. For twill and satin weaves, fabric count has little
influence on tearing resistance. Tearing resistance is always high for twill and satin; fewer interlacements allow yarns to move and share tearing force.
What is the durability of complex weaves?
In general, complex weaves have high breaking strength and very good tearing resistance because of the complex interlacement of yarns forming the fabric and the high number of yarns used in their construction.
What is the effect of fabric structure on abrasion resistance?
Prominent fabric features are affected by abrasion first. Yarns on the surface of ridges in rib weaves and in some complex weaves are more susceptible to abrasion. Long floats in twills, satins and complex weaves are fully exposed to abrading forces and are also susceptible to snagging. Abrasion resistance is also greatly influenced by yarn twist and fibre toughness.
What is the effect of fabric structure on air permeability and water vapour transmission.
Open constructions due to the low fabric count allow greater air flow and moisture vapour transmission. Tight constructions due to the high fabric count reduce air flow and moisture vapour transmission, giving wind/rain resistance instead. Fewer interlacements in weaves like twill and satin lead to tighter fabric constructions, thereby giving better wind/rain resistance.
What is the effect of fabric structure on fabric drape?
Fewer interlacements provide greater yarn mobility within the fabric which leads to good draping properties. Satin fabrics generally have better draping qualities than either twill or plain weaves.
What is the effect of fabric structure on fabric lustre?
Longer floats in the woven structure have the potential for greater lustre. Satin weaves are the most lustrous of the basic weaves, especially the 7/1 interlacement. However, fabric lustre is primarily influenced by yarn type, texturing and twist, fibre length, fineness and smoothness.
What is the effect of fabric structure on wrinkle resistance?
Fewer interlacements and greater yarn mobility leads to better wrinkle resistance which is why twill and satin weaves are better than plain weaves. Fabric wrinkle resistance is also influenced by fibre type, yarn type, and size and twist.
