HEV 155 exam 4
Terms
undefined, object
copy deck
- what's a monofilament?
- Very strong yarns made from single course filament fiber, used for sewing thread
- what's throwing?
- the term used for twisting silk yarns
- what are tape and network yarns used for?
- carpet backing, ropes, fishnets, bags and support fabrics
- what is yarn performance and quality based on?
- size, twist, bulk, evenness, apperance, and performance
- what is the selvage?
- part that runs parallel to length of fabric
- what is off grain?
- the angle doesn't make 90º, more like 120º
- what is skew?
- on an angle
- what is bow?
-
_
|_( - what is fabric count?
- number of warp and filling yarns per inch
- what is a balanced weave?
- the warp size and filling size are the same number
- what is an unbalanced weave?
- the warp size and filling size are different
- What would 80x50 equal?
- 130, you add even though the x is there
- What's a directional fabric?
- a fabric like velvet that matter which way the grains face, so more fabric is needed
- what are light weight fabrics?
-
Under 4oz, such as organdy, and china silk
also tissue gingham, lawn, chambray, challis, batiste - what are medium weight fabrics?
- 4-6oz such as taffeta, printed cloth, percale, madras cloth, muslin, glazed chintz, ginghams, flannelette
- what are heavy weight fabrics?
- greater than 6oz such as homespun, butcher cloth, flannel, tweed, tropical worsted suiting fabric
- what are ranges for fabric counts?
-
low-10x12 or 48x44
medium-64x60 or 80x80
high-over 160
there are usually more warp threads than weft - how much energy do air-jet looms require?
- 3x the energy of projectile looms
- what is knitting?
- the inter-looping of yarns to make a fabric
- what are traits of knited fabrics?
- more likely to snag, skew, more likely to shrink, good insulation, not likely to wrinkle, the wale can collapse, less expensize
- what are warp knits used for?
- lingre
- what are wales?
- vertical columns
- what are courses?
-
crosswise loops/horitzontal rows
the c's - what are the 2 types of knits?
- flat and circular
- Can flat knits be single or double?
- yes
- How is yarn for knitting bought?
- by weight, not yardage
- What can circular knits make?
- socks, t-shirts, hoses, undershirts
- what are the 4 types of stitches?
- knit, tuck, float or miss, or purl
- Do double knits have knit stitch on one side?
- no, on both sides
- which way do yarns run in knits?
- yarns run horizontally in filling knits and run vertically in warp knits
- how are loops of same course joined?
- to each other in filling knits, and adjoining course in warp knits
- how do loops connect?
- horizontally in filling knits, and diagonally in warp knits
- how do insertion warp knits work?
- have yarns laid between knitting w/o making part of knitting process. only laid in 1 direction
- What type of stretch do warp and filling knits have?
- filling knits stretch 2 way, warp knits stretch diagonally
- Do warp or filling knits unravel?
- filling knits
- What machine are warp knits made on?
- circular machines, filling can be on either
- what are films made from?
- polymer solutions
- what are some uses of films?
- shoes, shower curtains, upholestry, and plastic bags
- how is foam made?
- by adding air into an elastic like substance
- what is a fabric from fiber?
- tapa cloth used by pacific islanders
- what are non-woven fiberweb structures?
- dry-laid, wet-laid, spun-bonded, spun-lace, melt-blown
- what is a composite fabric?
- a fabric made of both filament and staple yarns.
- what are other uses of fabric production?
- needle punching, chemical adhesives, fiberfil, batting from new fiber, wadding from old fiber, fusible non-wovens, felts, netlike structures
- what is a blend?
- mixing of 2 different fibers into 1 yarn
- what is a mixture?
- 2 different types of yarn w/o losing there identity
- What are warp knits made in only?
- yardage