• Journal of the Korean Society of Clothing and Textiles
• /
• v.26 no.10
• /
• pp.1467-1477
• /
• 2002

This study was investigated physical properties of stretch fabrics by KES-FB system to show suitable basic data to making skirts of excellent capacity and develop more organized basic skirt pattern by fitness evaluation. 1. The results of T. H. V.(Total Hand Value) were as followa: In the kind of blending fiber, cotton/spandex was more excellent than nylon/spandex and polyester/spandex, in the direction of stretch, one-way(weft inserted polyurethan yarn) polyester/spandex and cotton/spandex were higher than two-way(warp and wet inserted polyurethan yarn) polyester/spandes and cotton/spandex, two-way nylon/spandex was higher than one-way nylon/spandex. 2. The results of calculating the variance between sample stretch fabrics and Japanese s/s women's suit fabrics after standardizing were as follows: Stretch fabrics has 2 range of tensile, bending, shearing, compression, surface, thickness and weight as compared with Jpanese s/s women's suit fabrics. In the tensile property, one-way stretch fabrics were almost the same with Japanese s/s women's suit fabrics, only two-way polyester/spandex had+1～+2 range. In the bending, shear property, there was no difference between sample fabrics and Japanese s/s women's suit fabrics 3. In the total fitness of the skirt, nylon/spandex is the best in the fabrics and one-way stretch fabric is better than two-way strethch fabric.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.20 no.2
• /
• pp.390-397
• /
• 1996

The effects of the mixture of surfactants on the removal of triolein applied to cotton and polyester fabrics were studied. The sunactants which were usually formulated to the Iriundry detergents, such as sodium dodecyl sulfonate (LAS), sodium lauryl sulfate (AS), $\alpha$-olefin sulfonate (AOS, C=14), sodium laurethoxy sulfate (AES, EO=3) and lauryl ethoxylate (AE, EO=7) were used. Washing was done at 40'C, 60"C, 80'c and the surfactant concentration was 0.05%. Backscattered electron imaging was made to study the location of triolein in the yarns. Triolein was removed easily from polyester than cotton fabrics.01eic acid added triolein wa9 removed greater than triolein only, except in AE solutions. In AE solutions, the removal of triolein was increased as the tremperature went higher and the increasing rate of the removal of triolein only was greater than that of oleic acid added triolein. In the result, more triolein was removed from triolein only than from oleic acid added triolein at 80t When the other surfactant was added to LAS, AES was the best to cotton fabrics, AOS was to polyester fabrics. Triolein was located in the lumen and grooves of the fibers and the deeper interfiber spaces. Triolein did not make thin film arround the cotton fiber in the surface, but polyester fibers. These are the main reason why the removal of triolein was difficult from cotton fabrics.rics.

• Journal of the Korean Home Economics Association
• /
• v.40 no.3
• /
• pp.11-20
• /
• 2002

The purposes of this study were to investigate the subjective wearing sensation of sleepwear, and to evaluate the comfort properties of fabrics used in the sleepwear. Design of experimental clothing was pajamas made with four types of woven fabrics: plain weave and satin weave made by cotton and polyester. The comfort properties were evaluated with respect to thermal retention, Qmax, moisture regain, water vapor transmission, and air permeability. The wear trials of experimental clothing were performed in two different environments, single-detached unit($23{\pm}1^{\circ}C$, $45%{\pm}3%$ R.H.) and apartment($27{\pm}1^{\circ}C$, $40{\pm}3%$ R.H), to evaluate microclimate temperature and humidity, and subjective wearing sensation. The results obtained from this study were as follows: 1. There were significant differences between the two environments on the clothing microclimate. 2. In the single detached unit environment, the microclimate temperature who wore cotton sleepwear was significantly higher than that of subjects wore the polyester sleepwear, whereas the microclimate humidity who wore polyester sleepwear was higher than that of subjects wore the polyester sleepwear. 3. In the apartment environment, the microclimate temperature who wore the polyester sleepwear showed higher than that of cotton sleepwear, whereas there was no significant difference between the cotton and polyester sleepwear on the microclimate humidity. 4 There were partially significant differences in subjective wearing sensation according to the fiber md weaving type of sleepwear regardless environment. 5. There were also partially significant correlations among the heat/moisture transmission properties of fabrics, the clothing microclimate and the subjective wearing sensation of sleepwear.

• Textile Coloration and Finishing
• /
• v.35 no.3
• /
• pp.169-178
• /
• 2023

The extended use of polyester nowadays has increased the amount of waste polyester (PET) released into the environment. Although these materials don't directly harm living things or the ecosystem, their inability to biodegrade remains one of the major global threats, driving up the amount of solid waste made up of PET. Environmental concerns have approved an increasing interest in recycled PET however the production of recycled PET with sufficient mechanical properties is still a challenge. Recycled Polyester (rPET) yarns are inexpensive and have the potential to acquire better mechanical characteristics through physical treatments, particularly by using technically simple method like uniaxial drawing. This study inspected the drawn behavior of virgin PET yarns and rPET yarns under various drawing parameters by first analyzing the initial material characteristics of both yarn. The impact of stretching on mechanical and morphological properties was also investigated. The results showed that virgin PET has better properties than rPET yarn; however, mechanical properties resembling virgin PET are achieved after optimizing the draw ratio.

• Steel and Composite Structures
• /
• v.22 no.1
• /
• pp.13-24
• /
• 2016

In the present paper, glass fibers are substituted partially with monofilament fishnet and polyester matrix for making the composites. The composite specimens were prepared in accordance with ASTM for analyzing the flexural strength and dynamic mechanical properties. Furthermore, machinability revealed the interaction of glass fiber and partial substituted monofilament fishnet fiber with the matrix. Fiber pullouts on the fractured specimen during the physical testing of the composites are also investigated by COSLAB microscope. The results reveal that the fishnet based composites have appreciably higher flexural properties. Furthermore, the glass fiber, woven roving and fishnet composite has more storage modulus and significant mechanical damping. The composite specimens were fabricated by hand lay-up method. Hence, these composites are the possible applications to develop the value added products. The results of this study are presented.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.12 no.1
• /
• pp.193-202
• /
• 2008

This paper investigates experimentally the confining effect, strengthening capacity and rebound rate of sprayed Fiber-Reinforced-Polymer (SFRP). From the method, resin and chopped fibers are sprayed separately from the nozzle with high pressure, and then they are attached to the concrete surface, so structure could be repaired. To evaluate the strengthening effect of sprayed FRP, cylindrical specimens and beam specimens were strengthening with SFRP. As main material of FRP, glass fiber and polyester resin are used. To investigate the optimum condition of sprayed FRP, the effects of fiber length, coating thickness, fiber volume ratio and concrete strength were examined. Capacities of sprayed FRP method were also compared to the FRP sheet method. In case of the sprayed FRP, rebound rate is important parameter considering economical efficiency and constructibility, so rebound rate of was discussed. From the test results, optimum conditions of sprayed FRP were determined. SFRP method showed superior strengthening capacities than FRP sheet method.

• Journal of The Korean Society of Agricultural Engineers
• /
• v.58 no.3
• /
• pp.21-27
• /
• 2016

This study was performed to evaluate engineering properties of carbon and glass fiber reinforced recycled polymer concrete. Fiber reinforced recycled polymer concrete were used recycled aggregate as coarse aggregate, natural aggregate as fine aggregate, $CaCO_3$ as filler, unsaturated polyester resin as binder, and carbon and glass fiber as fibers. The compressive and flexural strength of carbon fiber reinforced recycled polymer concrete were in the range of 68~81.5 MPa and 19.1~21.5 MPa at the curing 7days. Also, the compressive and flexural strength of glass fiber reinforced recycled polymer concrete were in the range of 69.4~85.1 MPa and 19~20.1 MPa at the curing 7days. Abrasion ratio of carbon and glass fiber reinforced recycled polymer concrete were decreased 21.6 % and 11.6 % by fiber content 0.9 %, respectively. After impact resistance test, drop numbers of initial and final fracture were increased with increase of fiber contents. Accordingly, carbon fiber and glass fiber reinforced recycled polymer concrete will greatly improve the hydraulic structures, underground utilities and agricultural structures.

• Proceedings of the Korean Fiber Society Conference
• /
• 2003.04a
• /
• pp.111-114
• /
• 2003

폴리에스테르 직물의 염색가공공정은 직물의 종류 및 용도에 따라 매우 다양하다. 최근에는 각종 신합섬 및 기능성을 갖는 제품의 등장으로 인해 기존의 공정이 세분화되어 적용되고, 각 공정의 조건 또한 복잡하다. 폴리에스테르 직물의 최종 물성은 이러한 단위공정의 영향을 크게 받는다. 동일한 생지를 사용한 직물의 경우에도 염색가공 공정 및 공정 조건에 따라 큰 차이를 나타내는 것으로 판단된다. 하지만 실제 생산 현장에서는 이러한 물성에 대해 객관적인 계측 없이, 최종 가공이 끝난 제품을 대상으로 몇몇 기술자의 경험에 의해 주관적으로 생산된 제품의 품질을 평가하고 있다. (중략)

• Proceedings of the Korean Fiber Society Conference
• /
• 2003.04a
• /
• pp.434-435
• /
• 2003

Physicochemical properties of a polymer surface significantly affect adhesion, wetting, and dyeing properties. In recent years, low temperature plasma technology has been widely used for surface modification of polymers. Surface fluorination by low temperature plasma treatment has been employed to improve the water and oily repellency of textile fabrics. However, very few results have been reported on soil release properties of the oxygen plasma treated textile fabrics. (omitted)

• Proceedings of the Korean Fiber Society Conference
• /
• 2002.04a
• /
• pp.143-146
• /
• 2002

폴리에스테르를 염색할 수 있는 분산염료는 비수용성이기 때문에 염색시 염욕 내에서 응집, 결정화되는 현상을 방지하기 위하여 반드시 분산제를 첨가하여야 한다. 그러나 분산제를 사용하더라도 분산염료를 염욕 내에서 완전한 분산상태로 만들 수 없으며, 염색시 여러 원인에 의해 염료의 재응집 현상이 발생될 수 있을 뿐만 아니라 최근 거론되고 있는 환경문제로 인하여 분산제의 사용이 제한될 가능성도 있다. (중략)