Comparative performance of polypropylene and nylon hosiery using wear and laboratory tests Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/4x51hm36b

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  • The purpose of this study was to compare the performance of hosiery made from a new fiber, polypropylene, with the performance of hosiery made from a better known fiber, nylon, and to get some indication of consumer reaction to a new textile product. Information was obtained through two wear tests and selected laboratory tests using different brands of hosiery with both fiber types represented. Two questionnaires were used as part of the wear tests. The first obtained information about the subjects and about some of their opinions concerning hosiery wear in general. The second questionnaire obtained information about the subjects' opinions concerning the hosiery worn in the wear tests. Thirty subjects participated in the first wear test with each wearing one pair of hosiery made of each fiber. Ten subjects participated in the second wear test, six of whom had also been part of the first test. The performance of the hosiery was checked by considering the number, severity and position of faults which occurred in relation to the number of days worn and by measuring to find the amount of stretch found in the worn hosiery. Laboratory tests were conducted to verify certain information obtained about the hosiery during the wear tests as well as to obtain further information about the hosiery. The questionnaires were analyzed by using percentages of the number responding to each part of each question. In this way, a general picture of the majority could be made to find out something about the subjects as a group and about their opinions of the hosiery. The wear life of the hosiery as shown by the number of days worn was related to the number of total faults found in the test hosiery. In addition, each type of fault, snags, runs, and abrasion marks, was considered. The two fiber types of hosiery were compared by testing to find if the differences between means were significant using F ratios. An additional check was made for covariance between the number of runs and the total days worn, and between the number of abrasion marks and the total days worn. All hosiery increased in width and decreased in length during the wear periods. The average amounts of dimensional change were analyzed by comparing the mean differences of the two fiber types of hosiery. The results were verified in the laboratory using a stretch and recovery test under controlled conditions. The differences in the means found in the laboratory test were checked for significance using F ratios. The rates of recovery were plotted on a time graph. An evaluation of the degree of fading was made by a panel of judges using a ranking system. The amount of, and the deviation from linear regression was found. Hosiery of both fiber types were washed in the laboratory and used as control groups to check with hosiery worn and washed by the subjects. Four laboratory tests were conducted to help describe the hosiery used in the study and to supply further information as to the differences in performance of hosiery made of polypropylene and of nylon. The yarn numbers and the course and wale counts were found. Yarn breaking strengths and the percents of elongation were analyzed by using a t test. Standard deviations checked the amounts of variation from the means. The same types of analyses were done to compare the two fiber types of hosiery as to the differences found in the bursting strengths of the knee and toe areas of the hosiery. In addition the F ratios were also found.
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  • File scanned at 300 ppi using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2014-05-19T14:47:56Z (GMT) No. of bitstreams: 1 MerrellMabel1965.pdf: 600485 bytes, checksum: e8ad66c2741cd2d50f217b5f8c5d7531 (MD5)
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2014-05-20T19:46:09Z (GMT) No. of bitstreams: 1 MerrellMabel1965.pdf: 663378 bytes, checksum: 8d90c6e7e8ea0845bc08546f9d011aa0 (MD5)
  • description.provenance : Submitted by Lauren Kaysen (lkscannerosu@gmail.com) on 2014-05-20T19:42:34Z No. of bitstreams: 1 MerrellMabel1965.pdf: 663378 bytes, checksum: 8d90c6e7e8ea0845bc08546f9d011aa0 (MD5)
  • description.provenance : Approved for entry into archive by Katy Davis(kdscannerosu@gmail.com) on 2014-05-21T17:02:50Z (GMT) No. of bitstreams: 1 MerrellMabel1965.pdf: 663378 bytes, checksum: 8d90c6e7e8ea0845bc08546f9d011aa0 (MD5)
  • description.provenance : Rejected by Katy Davis(kdscannerosu@gmail.com), reason: Replace on 2014-05-20T19:39:03Z (GMT)

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