Development of tricot warp knitted fabrics with moisture management for casual shirt

Qing Chen,Jie Feng,Bomou Ma,Bailu Fu,Rong Zheng,Jintu Fan 한국의류학회 2022 Fashion and Textiles Vol.9 No.1

Warp knitted mesh fabric was usually applied to sportswear due to good air transmission, but without multilayer structure and one-way transport property. In order to solve this problem, the miss-lapping structure was applied to examine the possibility to fabricate multilayer and improve water transport in warp knitting structure. Besides, the efect of thread type and warp density on comfort properties were also exploited to enhance the moisture management. The moisture management test, water vapor permeability and air permeability were examined. Long foat at the back side in structure I formed by miss-lapping could improve liquid transport and air permeability, but slightly reduce water vapor permeability. With proper density, there existed the optimal one-way transport capacity and overall moisture management. Warp density in 20 cpc was an optimal parameter of knitting process. Taking advantage of miss-lapping, sample 5 where polypropylene was partly threaded on GB1 provided best moisture management, water vapor permeability and air permeability.

마직물 및 마혼방직물의 온열특성에 대한 흡습의 영향

권오경,이참미,성우경,Kwon, Oh-Kyung,Yi, Chang-Mi,Sung, Woo-Kyung 한국의류산업학회 1999 한국의류산업학회지 Vol.1 No.2

The thermal properies of the pure linen fabrics available in the market and linen blended woven fabrics were measured at the moisture content of 0%, 20%, 40% and 60% using KES-F7 system (Thermo Iabo II type). The experimental properties were statistically analyzed by the rate of water absorbent. The main results were as follows; There is a positive correlation between the thermal insulation value (TIV) and thickness of pure linen fabrics and linen blended woven fabrics by water absorption. Whereas an negative correlation exists between the TIV and cover factor. There is a high positive correlation among the thermal conductivity (k), thickness and weight of pure linen fabrics and linen blended woven fabrics by water absorption. Wherase a high negative correlation exist between the k and air' permeability (Ap). There is a high positive correlation between the feeling of warmth/coldness and bulk density of pure linen and linen blended woven fabrics by water absorption. Wherase a high negative correlation exists between the feeling of warmth/coldness and porosity. There is a negative correlation between TIV and $q_{max}$ of pure linen fabrics and linen blended woven fabrics. The higher the rate of water absorbent, the lower the TIV. This means that TIV decreases by water absorption. As for the thermal property by rate of water absorbent $q_{max}$ and k increase by water absorption and reach max-value at 60% rate of water absorbent. The TIV decreases by water absorption and has +value at 0% rate of water absorbent, whereas it has -value with a feeling of coldness at 20%, 40%. and 60% rate of water absorbent.

후지(厚地) 면직물의 특성에 관한 연구(Ⅰ) : Frazier법에 의한 통기도

변희윤,김덕리,구자길,황백순 부산대학교 1999 生産技術硏究所論文集 Vol.56 No.-

This paper describes the properties and air permeability of heavy cotton fabrics. The physical properties (air permeability and water vapor transmission in fiber assembly) have considerable effects on hygiene and comfort. The studies on air permeability and water vapor transmission were carried out using many types of apparatus. In this study, air permeability, open free area, relative open free area, pore diameter, and water vapor transmission were obtained by computerized Frazier Method. Air permeability of heavy cotton fabrics has correlation with open free area and relative open free area, respectively (r=0.9 over). By controlling the fabric count and yarn diameter, we could predict air permeability. As the ratio of open free area, relative open free area, and air permeability were increased, the value of water vapor transmission resistance was decreased. 본 연구는 후지 면직물의 특성에 관한 첫 번째 연구로 후지 면직물의 통기도에 관해서 조사하였다. 섬유집합체의 통기성과 투습성은 위생성능면과 쾌적성 평가면에서 매우 중요한 인자중의 하나이다. 따라서 섬유집합체의 통기성과 투습성에 관한 연구는 오래 전부터 행해졌으며 여러 가지형의 시험기도 개발되어 왔다. 그중 본 연구에서는 Frazier법으로 측정하여 통기성과 평면기공률, 상대평면기공률, Pore diameter 및 투습저항과의 관계를 조사해본 결과 면 후지직물의 통기성은 평면기공률, 상대평면기공률과 각각 정상관의 관계이고(r=0.9이상), 직물의 밀도와 실의 지름을 제어함으로써 통기성을 예측할 수 있었고 직물의 평면기공률, 상대평면기공률, 공기투과도가 크면 투습저항이 적어졌다.

발수제가 수성페인트의 물리적 성능에 미치는 영향

이수용,남기융,김지현 한국건축시공학회 2014 한국건축시공학회지 Vol.14 No.3

This study is to analyze durability of water-repellent paints mixed with water-repellents as outer surface finishingmaterials, and evaluate its feasibility. General functions and water-repelling effects were tested, and the feasibility wasevaluated based on the test results. The experimental results of heat conduction durability, air permeability, absorption,and bond strength suggested that water-repellent paints mixed with water-repellents were suitable for finishingmaterials. Considering overall general durability performances, stable mixing ratios were 2, 5, and 8%. 본 연구는 외부 표면마감 재료로서 발수제를 직접 혼입한 수성페인트의 내구성능을 분석하여 실제 현장에 적용하기 위한 실용성을 평가하고자 하였다. 이를 위해 일반적성능 및 발수효과 실험하였으며 도출된 결과를 바탕으로실제 현장에서 적용하기 위한 하나의 공법으로서의 가능성을 분석하여 다음과 같은 결과를 도출하였다. 열전도성,통기성, 흡수성 및 부착강도의 성능 실험에서도 수성 페인트에 발수제를 혼합하여 마감재료로 사용하는 것은 적정한 것으로 판단된다. 일반적인 내구성능을 종합적으로 고려해 볼 때 혼합비율은 2, 5, 8% 범위가 안정적인 것으로판단된다.

Polymeric dense membrane incorporated with hydrophilic additives for air dehumidification

김효선,서영수 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0

Membrane based separation technology has been studied for various applications such as gas separation, solvent purification. Among them, membrane with high water vapor permeability is an emerging technology for air dehumidification. This membrane can reduce power consumption due to extracting water vapor from the humid air without release of latent heat. Here, We designed hydrophobic polymer based dense membrane with selective water permeability incorporated with hydrophilic additives, cellulose nanofiber (CNF). CNF provides nonionic water vapor channel and at the same time reinforces polymer mechanical property. The structure and properties of the membrane are characterized by SEM, water-vapor permeability analysis, and gas permeation test.

Preparation of Porous m-aramid/cellulose Blend Membranes with High Moisture and Air Permeability by an Enzymatic Degradation Method

Rao Fu,Congcong Dong,Changmei Sun,Rongjun Qu,Chunnuan Ji,Ying Zhang 한국섬유공학회 2018 Fibers and polymers Vol.19 No.6

Enzyme degradation method was adopted to prepare porous m-aramid/cellulose blend membranes with high air permeability, water absorbency and moisture permeability. This facile preparation process started by casting a blend membrane from a DMAc/LiCl solution containing m-aramid and cellulose. An enzyme was then used to degrade the cellulose in the blend membrane, resulting in porous structures. Five enzymes including cellulase, chitosanase, papain, lipase, and glucose oxidase, were evaluated and cellulase was found to be optimal. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to characterize the miscibility and the morphology of the m-aramid/ cellulose blend membranes before and after degradation, respectively. The thermal stability of the blend membranes were characterized by thermogravimetric analysis (TGA). The properties including air permeability, water absorbency and moisture permeability of the m-aramid/cellulose blend membranes greatly improved after degradation as compared to those of the pure m-aramid. This paper provided a new approach to preparing novel textile materials with high comfortability.

면 편성물의 방염처리에 의한 쾌적성 변화

이효진,지주원,Lee Hyo-Jin,Jee Ju-Won 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.2

In this study, the effect of fixation methods, relaxation treatment and washing treatment on the comfortable properties of MDPPA/HMM treated cotton weft-knitted fabrics was studied. As a result, 1) Air permeability of knitted fabrics decreased after flame resistant treatment. Single jersey and 10G showed higher value of air permeability than those of interlock and 14G. Swelling agent and wet fixation method which increased the values of W/T and decreased the values of WC/W resulted in decreased values of air permeability. 2) $Q_{max}$ of knitted fabrics decreased after washing treatment. $Q_{max}$ of knitted fabrics increased with decreasing air permeability 14G showed higher value of $Q_{max}$ than those of 10G. 3) Water absorption of knitted fabrics increased after relaxation treatment. Water absorption of knitted fabrics increased with increasing the value of W/T. Water absorption of knitted fabrics is more affected by the structure of fabrics rather than the effect of treatment.

콘크리트의 중성화와 철근부식에 미치는 투기성능의 영향

소형석(So Hyoung-Seok) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.9

In the alkaline environment of concrete, the reinforcement is protected against anodic iron dissolution by a passive layer on steel surface. However, the drop in pH of the concrete pore water due to carbonation as well as chloride concentrations exceeding the threshold value will cause an extended or local breakdown of the passive layer, thus encouraging the anodic step of iron dissolution. Based on these mechanisms, the permeability of concrete such as air permeability could control a quantitative indication of potential corrosion rate. This paper reports the influence of air permeability of concrete on reinforcement corrosion due to carbonation of concrete in RC structures. The investigation has been carried out on 21 types of concrete, which are made by some parameters such as different levels of water-binder ratio, the type and replacement ratio of admixture materials, in order to measure the air permeability, depth of carbonation and corrosion rate of reinforcing steel. As a results, air permeability of concrete is related to the corrosion rate of reinforcing steel due to carbonation as well as the depth of carbonation, and the correlation coefficients are high. However, the relationship is influenced by parameters such as the water-binder ratio and the addition of admixture materials. Thus, the coefficient of air permeability may also be used in the evaluation and rehabilitation of older RC structures as well as for estimating the remaining service life in the reinforcement corrosion due to carbonation.

폐쇄용 시멘트 모르타르의 수밀성 및 기밀성 평가에 관한 연구

박상순,권성준,정지원 청운대학교 건설환경연구소 2011 청운대학교 건설환경연구소 논문집 Vol.6 No.2

저준위 방사성 폐기물 처분장의 사일로 내부 충전재와 같이 밀폐 성능이 요구되는 시멘트 모르타르에 대한 수밀 및 기밀성을 평가하는 것을 연구의 목적으로 한다. 이를 위해 세 가지 다른 배합비로 만든 시편으로 관련시험규격에 따라 용적밀도, 공극률, 압축강도, 투수 및 투기계수를 구하였다. 또한 이론적인 수치모델의 해석상수를 물흡수계수시험으로 구한 결과를 기초로 수분확산계수를 도출하였으며 흡수율 시험결과와의 비교를 통해 타당성을 검증하였다. This study is to evaluate the water-tightness and air-tightness of cement mortar for closing of low-level radioactive waste repositories. It is performed to test volume density, porosity, compressive strength, water and gas permeability of specimens with 3 different mixing proportions in accordance with the ASTM and KS test specification. A moisture diffusion coefficient is derived from numerical analysis model based on the test result of a water absorption coefficient and compared with the test result on the absorption rate of cement mortar specimen.

석탄회 성형배지(Ash Ball)의 이화학적 특성과 염류집적 및 제거효과

이현일,유근창,강위수,김일섭 (사) 한국생물환경조절학회 2001 시설원예‧식물공장 Vol.10 No.2

Physical and chemical properties, the salt accumulation and leaching of salt by water of coal fly ashball (ash ball) were evaluated in comparison with perlite and granule rockwool (rockwool). Bulk den-sity, particle density, solid phase, and porosity of ash ball were 0.93 g cm-3, 2.29 g cm-3, 40.6%,59.4%, respectively. The bulk density of ash ball was greater, while porosity was smaller, than that ofperlite and rockwool. Saturation moisture capacity was 52% in ash ball, 71% in perlite, and 90% inrockwool. Water contents after drainage for 1 hr of ash ball, perlite, and rockwool were 21%, 27%,and 80%, respectively. Water content of small granules (3-5 mm) of ash ball was 5% greater than thatof large (7-15 mm) granules. The ash ball was a weak alkali substrate with pH 7.6, but not electricconductivity (EC), of the nutrient solution supplied to ash ball slightly increased. When the absorp-tion of mineral ions to substrates were analyzed, ash ball and RW absorbed mainly PO4-. In tomatoculture, salt accumulation in ash ball substrate was similar to that in perlite. Most of the salts in theash balls were removed by submerging the substrate eight times in distilled water. It is concluded thatwater holding capacity of ash ball substrate was low as compared to other substrates, but air perme-ability, and water diffusion was excellent, making control of medium water content easy.