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불직포의 열적성질과 보온성에 관한 연구 (IV) -풍속, 두께 및 영도 변화에 대하여-
박명수,신현세,주강,Park, Myung-Soo,Shin, Hyun-Sae,Joo, Kang 한국섬유공학회 1991 한국섬유공학회지 Vol.28 No.5
This has been studied on warmth retaining properties with various air velocity, density and thickness at the condition of horizontal wind as the constant wind lather. The transmission rate of air decreased with increasing the Backingh density of the first 5mm of air inlet part of the sample and with increasing heavy thirkness. In the thermal equilibrium state, the translmssion area which is le. is influence of air velocity was detected in sample thickness 20mm and packing density 0.0,3891cm 3. The changes of warmth retaining ratio was closely related to the rhanre of Iran Hision of air velocity, and then it is increased as thickness increase at low air.
부직포의 열적 성질과 보온성에 관한 책구 (III) -풍속과 두께 변화에 대하여-
이경우,박명수,신현세,주강,Lee, Kyung-Woo,Park, Myung-Soo,Shin, Hyun-Sae,Joo, Kang 한국섬유공학회 1990 한국섬유공학회지 Vol.27 No.12
The change of warmth retaining properties of non-woven fabric with thickness and air velocity has been studied. The transmission of air velocity was approached to inverse proportion at above thickness 30 mm in air velocity 1.5 m/sec but in the above air velocity that was disregarded. The effect of air velocity could be indicated to time of reach thermal equilibrium and transmission of air velocity. In the thermal equilibrium state, transition area which has less influence on the air velocity was detected in sample thickness 30 mm to 50 mm.
부직포의 열적 특성과 보온성에 관한 연구(II) -풍속에 따른 충전 용도 변화에 대하여-
김대성,박명수,신현세,주강,Kim, Dae-Seong,Park, Myung-Soo,Shin, Hyun-Sae,Joo, Kang 한국섬유공학회 1989 한국섬유공학회지 Vol.26 No.1
Effects of air velocity and packing density under controlled heating and constant heat flow on thermal insulation of nonwoven fabrics were studied. Results obtained can be summarized as follows; 1. Thermal insulation should be considered in terms of air velocity, packing density, time required to reach thermal equilibrium and thermal behavior. 2. Time for thermal equilibrium decreases with increasing air velocity and decreasing packing density, respectively, while it increases with increasing packing density. 3. Thermal insulation is fairly sensitive to increasing packing density at the air velocity of 0.5m/sec while it becomes less sensitive to increasing air velocity, representing almost constant values at the air velocity of more than 2.0m/sec. 4. Thermal insulation effeciency of nonwoven fabrics makes than 10 percent, providing unfavorable thermal insulation effect.