Homework 7 - 11 1 22PTFE Homework 7 2 Laura Hughey 1. Fiber...

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2 2 2 1 1 1 PTFE Homework 7 Laura Hughey 1. Fiber length is critical in processing of fibers and yarns and in the translation of fiber to yarn strength. The longer the fiber length, the higher quality the fiber is. For cotton, the longer the fiber length, the higher quality the cotton is. The longest cotton fiber is 2 inches, whereas the shortest is 5/8 th inch. Mean length is often used to describe cotton length. 2. Fineness of fibers is measured in terms of mass per unit length and not in terms of diameter because the fiber might not have a circular cross sectional area or the diameter might be hard to measure. They both deal with density because of the cross sectional area and linear density. 3. For PP, you can use toluene and for PE, you can use dioctylphthalate. These liquid chemicals have similar solubility parameters. 4. 94.34 tons 5. Both wool and cotton have hydrogen bonding, so they are capable of absorption. But wool has low crystallinity and more accessibility so it absorbs more moisture
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This note was uploaded on 09/12/2011 for the course PTFE 2200 taught by Professor Kumar during the Fall '10 term at Georgia Institute of Technology.

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Homework 7 - 11 1 22PTFE Homework 7 2 Laura Hughey 1. Fiber...

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