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연구논문 : 인공강우시스템을 활용한 의복의 방수성능 평가
차희철 ( Hee Chul Cha ),박준호 ( Jun Ho Park ),임지영 ( Jee Young Lim ),심현섭 ( Huen Sup Shim ) 한국의류산업학회 2015 한국의류산업학회지 Vol.17 No.6
As the interest in leisure and health increases, the domestic outdoor wear industry becomes bigger. The waterproofness of fabrics does not ensure the waterproofness of garments because of the stitch holes during the sewing process even with the seam sealing tapes. Thus the water leakage often becomes a problem during the end use. Still companies use fabrics waterproofness data for garments marketing because they are simple to run the test, less expensive than the whole garment testing, and easy to achieve the quality control. In this study the rain tower system for evaluating the waterproofness of garments has been developed and the waterproofness of the selected waterproof and breathable garments in the market were tested. The rain tower was consisted of rain tower room, rainfall forming system and measurement system. Two different levels of rainfall can be simulated with this system(100l/m2/hr and 450l/m2/hr). Jackets in the market have been tested at two different rainfall conditions. The temperature and humidity data inside jackets didn`t provide much information on the waterproofness at severe rainfall condition(450l/m2/hr, 1 hour). However, water leakage was detected on the cotton undershirt inside jacket. 5 out of 8 jackets passed the normal rainfall condition(100l/m2/hr, 30 minutes). The newly developed rain tower system was able to evaluate the waterproofness of the jacket seams. It is recommended the further study on the detailed test conditions for the end use of the waterproof and breathable garments.
PET/PTT/Rayon 스테이플 혼방직물의 역학적 특성
이대훈,최규락,나미희,차희철,Lee, Dae-Hoon,Choi, Kue-Lak,Na, Mi-Hee,Cha, Hee-Chul 한국섬유공학회 2012 한국섬유공학회지 Vol.49 No.2
The mechanical properties and strain at applied loads for PET/PTT (polyester/poly trimethylene terephthalate)/rayon staple blended fabrics, PET/rayon blended fabrics, and PET/rayon containing PU fabrics were studied. The result of the research shows that PET/PTT/rayon staple blended fabrics have higher bending and shear properties than other fabrics in cases regarding the weft direction. Elastic recovery above a 30% strain of PET/PTT/rayon staple blended fabrics is larger than that of other fabrics. PET/PTT/rayon staple blended fabrics are easily extensible at the small as well as the large deformation region.