Thesis (M.H.A.)--University of Michigan, 1964.

Thesis (M.H.A.)--University of Michigan, 1964.

Inaug.-diss.--Heidelberg. / Lebenslauf. "Literatur": 1 p. following p. 57.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1975. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Bibliography: leaves 164-172.

Microfibers, textile fibres shorter than 5 mm, and are shed from fabrics during wear and released into the laundry effluent during washing. When passed through the wastewater treatment plant (WWTP), they adsorb toxins, heavy metals and pathogens before being released into the environment. Synthetic microfibers persist for long periods of time in aquatic environments and very little is known about the degradation of processed natural fibres. Hydrocyclonic separation was studied as a way to separate the microfibers from the effluent before being they get additionally contaminated at the WWTP. A hydrocyclone has no moving parts and functions by utilizing centrifugal force and the difference in specific gravity between the fluid and the particles that are to be separated. The separation efficiency is dependent on its dimensional and operation parameters. No previous studies on hydrocyclonic separation of microfibres were found. Polyester fleece blankets were washed. The effluent was filtered, and the filters weighed to determine the mass of the separated fibres. Sampling of the inhomogeneous effluent presented a challenge and larger sample volumes would be needed to adequately represent the population. Using a Büchner funnel, filter fouling led to filtration times of up to 6 h for 1 l of effluent. Dividing the 1 l samples into two 0.5 l samples, filtering separately and adding the weight reduced filtration time to 2 h and the results were not significantly different from filtering the whole 1 l sample with one filter. The hydrocyclones tested separated around 11% of the total weight of microfibers in the effluent, too low to be deemed viable. As only a few dimensional variables were tested, it could possible that a higher fraction could be separated with this method. Given that the commercially available filtration systems separate 30-80%, refining existing methods may yield better results.

Viable bacteria have been found on environmental surfaces, including washed and unwashed clothing, and places that come into contact with laundry. Under certain conditions, clothing contaminated with pathogenic organisms may present a health risk to the laundry handler. This research project focused on i) evaluating Staphylococcus aureus and MRSA survival using front-load and top-load washing machines; ii) determining relative microbial levels on new, disposable, laundered and unlaundered hospital scrubs; iii) characterizing the relative hygiene of public and apartment laundromat surfaces; and iv) developing a quantitative risk assessment for laundry handlers.Standard microbial evaluation techniques were used to identify and quantify a variety of microorganisms on fabrics and environmental surfaces, including HPC bacteria, S. aureus, MRSA, total coliforms and Escherichia coli. S. aureus and MRSA were exclusively used during evaluation of bacteria reduction levels achieved by front- and top-load washers.Results from this research indicate:i) Washing in either a top- or front-load washer affords a 5 - 6 log10 reduction of S. aureus and MRSA when detergent is used. If complete drying and/or bleach are also employed, a 6 - 7 log10 reduction is achieved and few organisms remain.ii) Bacteria cross-contamination of other fabrics within a laundry load is common for both types of washers and between loads on the interior of top-load washers.iii) Significantly fewer bacteria (p=0.044) were detected on hospital-laundered scrubs than on home-laundered scrubs.iv) Laundromat surfaces can be contaminated with substantial numbers of bacteria and the potential exists for transfer of bacteria from a past user to the next laundromat patron.v) The risk of acquiring a S. aureus infection after handling unwashed laundry contaminated with an initial S. aureus level of 106 CFU/cm2 was estimated to be 0.59 infections per person per year. The estimated risk became negligible if handling washed laundry.

Thesis (M.A.)--Florida Atlantic University, 1995. / Typescript (Photocopy). Includes bibliographical references (leaves 123-141).

Thesis (Ph. D.)--Institute of Paper Science and Technology, Georgia Institute of Technology, 2005.

Dark cottons are becoming popular for wearing apparel. Powdered starch customarily used in the home for restoring stiffness to cottons after laundering produces a spotted white product when used on dark cottons. Thus, homemakers are demanding information on ways to restore dark cottons to the original stiffness after laundering. where was no research in the published literature available to the investigator which was designed to answer this problem. / Master of Science

洗衣產業是傳統服務業，近年隨著社會與科技的進步，讓商業模式一成不變的洗衣產業出現了些變革，本研究透過訪問兩家創新商業模式之業者與二手資料輔助，以實際案例探討及分析洗衣產業之創新與傳統商業模式之差異、帶給顧客的價值與關鍵成功要素，希望對未來欲投資洗衣產業之業者有參考價值。 研究結論發現每種商業模式都有解決顧客不一樣的痛點與帶來不同的價值，前店後廠的現場洗滌中型洗衣店重視顧客感受與服務，便利超商洗衣打破顧客送洗時間的限制，App洗衣主打快速到府服務與24小時送回。洗衣產業之關鍵成功要素不在壁壘要高或提高顧客轉換成本，而是市場定位要準、有效的規模擴張、差異化與技術創新，又以前三項為主因。