Assignment 8 -Group 1
The Best Fibers for Various End Uses1. For a high luster, moderate cost evening dress (a) linen (b) mohair (c) silk (d) ramie (e) acetate
The fiber would have to have a high luster and good draping qualities.
E) Acetate would be the best choice. It has a high luster, excellent draping qualities and is inexpensive.
Linen is not a good choice because it easily becomes wrinkled, does not drape as well, and is rather expensive.
Mohair would be a good choice, but it is not as light weight as acetate or as inexpensive.
Silk is a luxorious fiber and would make an excellent choice, but silk is much more expensive than the "artificial silk" acetate.
Ramie is still not the best choice. It has properties similar to those of linen, but is much more expensive still to produce.
2. For simulated fur fabric (a) polyester (b) rayon (c) modacrylic (d) saran (e) wool
A simulated fur fabric would have to look and feel like fur.
C) Modacrylic is the best choice because of its good resilience and abrasion resistance, which make it especially suitable for its use in high-pile fabrics where it can simulate fur.
Polyester is not a good choice because it's used in high density fabrics for sportswear, rainwear, and apparel. Its mention of simulation into fur is not evident.
Rayon is still not the best choice because of its low resiliency and abrasion resistance.
Saran is not a good choice because its inflexibility eliminates it from use in apparel--it is more so used in plastic film.
Wool is not resistant to abrasion. While it may insulate like fur, it will not look or feel like it.
3. For blending with cotton in a permanent press man's shirt (a) olefin (b) acrylic (c) polyester (d) modacrylic (e) triacetate
A permanent press shirt would have to be strong, and wrinkle resistant.
C) Polyester is the best choice because it is wrinkle resistant and a strong, as well as, resilient fiber. Durable press fabrics are frequently made from blends of cotton and polyester.
Olefin would not be the best choice because, while it is strong, it is not as resilient as polyester.
Acrylic is not the best choice because its fibers are weak, shrink in steam, and when exposed to high, dry heat change in color.
Modacrylic will not work because their sensitivity to heat may result in shrinkage if they are dried in a dryer at high temperatures.
Triacetate would not be best, eventhough it is resistant to stretch and shrinkage, it is not abrasion resistant and therefore could not be used in items where durability is important.
4. For unlined curtains in a south-facing window (a) acrylic (b) acetate (c) silk (d) viscose rayon (e) nylon
D)A south facing window will not be in directly sunlight, therefore resistance to sunlight would not be as big an issue as durability and dye ability. Acrylic is a common material in upholstery and is very durable, but not as accepting of dyes as some of the other choices. Acetate is a more expensive fabric and is less durable but does make fine draperies. Silk is extremely expensive even though durable, but is negatively affected by direct exposure to sunlight. Nylon is durable and "sun resistant", but would probably not make aesthetically pleasing curtains. Viscose Rayon is the best choice and is often used in draperies. It can be dyed easily and is a more appeasing fabric to the eye than some of the other choices.
5. For carpet in an office building (a) polypropylene (b) nylon (c) wool (d) acrylic (e) cotton
B) An office building carpet needs to be abrasion resistant and non-absorbant so that it can be easily (somewhat) cleaned. Natural fibers such as cotton and wool would be the worst possible choice because they absorb any liquid or stain and would wear out in no time in an office setting. Acrylic is also a weak fabric and a bad choice. Polypropylene is a good choice because it is fairly strong and stain proof but is not as easily dyed nor as strong as Nylon, which is the best choice for this application.
6. For reinforcing material in a composite for sports applications (a) carbon (b) wool (c) Vinal (d) polyvinyl alcohol
A) Carbon fibers is the only material out of the choices above that is durable and firm enough to be put into sports applications (sports gear, etc). b,c, and d are all too weak and would be easily torn not to mention too flexible to absorb any shock.
Comments
Group 9: Group 1 did a good explanation of what fibers to use. When I made this comment there was no answers to question 4,5, and 6 but what they had looked pretty good with the right answers. I will make another observation in a couple of days to see if anything has been added.
Group 5: Yes, 1 did an excellent job in deciding which fiber was best, then delving further and describing the properties that make it superior. Further still, they tell why the other fabrics wouldn't work. Just like the assignment asked, well done.
Link to this Page
- Group 1 last edited on 14 November 2000 at 10:37:22 am by r72h119.res.gatech.edu