• Title/Summary/Keyword: Tensile resilience

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A Study of the Tensile Properties for Poly(trimethylene terephthalate, PTT) 1×1 Rib Knitted fabrics (Poly(trimethylene terephthalate, PTT) 1×1리브 편성물의 신장특성에 관한 연구)

  • Choi, Jae-Woo;Jang, Boung-Sik
    • Journal of the Korean Society of Industry Convergence
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    • v.9 no.4
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    • pp.337-341
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    • 2006
  • The tensile properties of Poly(trimethylene terephthalate, PTT) $1{\times}1Rib$ knitted fabrics were experimentally studies, and the specimens has $1{\times}1$ rib stitched structure which are weft knitted fabrics with various lengths of loop. The $1{\times}1$ rib weft knitted fabric showed larger tensile linearity, tensile energy and tensile resilience in the direction of courses. The tensile properties increased with increasing the loop density in all directions, and perfectly increased with the course directions than the wale directions.

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A Study on the Tensile Properties of Polyester Warp Knitted Fabrics (폴리에스테르 경편포의 신장특성에 관한 연구)

  • 김석근;최재우;남은우
    • Textile Coloration and Finishing
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    • v.12 no.1
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    • pp.17-24
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    • 2000
  • The tensile properties of polyester warp knitted fabrics of satin and reverse satin structure with various lengths of underlap were studied. In the range of low tension, the satin warp knitted fabric showed larger tensile energy and elongation in the direction of $0^\circ$ and larger tensile linearity, tensile resilience and initial modulus in $90^\circ$. Meanwhile, reverse satin one showed larger initial moduli in 0$^{\circ}$ and larger the others in $90^\circ$. In the range of high tension, the tendencies of both fabrics in $0^\circ$ direction were almost the same as those in all direction. As the under laps were shorter for both fabrics, tensile linearity, tensile energy and elongation increased, but tensile resilience decreased in all directions. However initial moduli were changed little.

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Mechanical Property, Thermal Conductivity, Rebound Resilience and Thermal Property of Chloro Isobutylene Isoprene Rubber/Ethylene Propylene Diene Monomer Blend

  • Hwang, Young-Bea;Lee, Won-Ki;Park, Chan Young
    • Elastomers and Composites
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    • v.53 no.2
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    • pp.80-85
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    • 2018
  • Chloro isobutylene isoprene rubber (CIIR) and ethylene propylene diene monomer (EPDM) compounded with other formulation chemicals, depending on the polymer blend, were prepared by mechanical mixing. After manufacturing the rubber vulcanizate by compression molding with a hot press, the mechanical and thermal properties including thermal conductivity, rebound resilience of the CIIR/EPDM blends were measured. As the EPDM rubber content increased, hardness and tension set showed a tendency to increase. Pure CIIR exhibited the lowest tensile strength; however, tensile strength increased with loading of EPDM rubber. On the other hand, in CIIR rubber, which is usually a low-rebound elastomer owing to a high damping effect, rebound resilience exhibited an increasing trend as the content of EPDM rubber increased. As the EPDM rubber content increased, thermal stability was improved due to reduction of decomposition rate in the rubber region of the blend vulcanizate.

An Analysis of Coherence and Resilience Depending on Materials Mixing Ratio in Elastic Landscape Pavement (조경용 탄성포장의 재료 배합비에 따른 결합력과 탄성분석)

  • Park, Won-Kyu
    • Journal of the Korean Institute of Landscape Architecture
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    • v.38 no.5
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    • pp.93-101
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    • 2010
  • The demand for elastic pavement, providing comfort for pedestrians is expected to increase continuously but the lack of a standard for materials mixing ratio, that is, the optimal mixing ratio between ERDM chip and polyurethane binder, is still in a trial and error stage. This study aimed at recommending an optimal mixing ratio for elastic landscape pavement through a coherence and resilience test depending on ratio. The test result is outlined as follows. In a tensile strength test, samples B and C indicated a close positive relationship between the binder mixing ratio and tensile strength, indicating that the higher the mixing ratio the higher the tensile strength. In a hardness test, none of samples A, B or C indicated a statistical interrelationship between the binder mixing ratio and hardness. That is, the hardness of the elastic pavement material remained unchanged, irrespective of the binder mixing ratio. In a resilience lest, Samples A and B indicated a close negative interrelation between mixing ratio and resilience, indicating that the higher the mixing ratio, the lower the resilience. Upon analyzing the optimal mixing ratio based on test results, an increase in tensile strength began to slow at a 20% mixing ratio, while resilience began to reduce rapidly at 22%, Thus the optimal range for a mixing ration appeared to be 20~22%. The outcome of this study could to provide guidance for improving the elasticity and stability of elastic pavement.

Development of Eco-friendly Woven Floor Mat with High Resilience II - Characterization of TPU Coating Yarn and Floor Mat - (고탄성 특성을 보유한 친환경 우븐 바닥재에 관한 연구(II) - TPU 코팅사 및 바닥재의 특성-)

  • Lee, Sun-Hee
    • Fashion & Textile Research Journal
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    • v.14 no.4
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    • pp.635-640
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    • 2012
  • In this study, thermoplastic urethane (TPU) coating yarns were prepared at various extruding temperatures. The fine structure and mechanical properties of resultant TPU coating yarns examined by the wide angle X-ray diffractometer (WAXD), differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), and tensile test. TPU coating yarns (prepared at extruding temperatures at $175^{\circ}C$) were confirmed as a stable fine structure that obtained excellent tensile strength and flexibility. The C samples prepared by optimized conditions made by TPU woven floor mat. The structure of the woven mat is $4{\times}4$ basket weave and have laminated with the EVA foam to obtained final TPU woven floor mat products. The resultant TPU woven floor mat was obtained to 1.5MN of tensile strength, 22% of the elongation, and 0.2MN of tear strength. The weight loss abrasion and the resilience by the ball rebound of the TPU-woven floor mat was prior to those of the PVC subsequently, we were able to develop a woven floor mat with TPU coating yarn and produce an eco-friendly high valuable woven floor mat using an interior product.

A study on the Change of Hand of Chitosan Crosslinked Cotton Fabrics - Effect of Concentration of Epichlorohydrin and Chitosan - (키토산 가교처리된 면직물의 태 변화에 관한 연구 - 에피클로로히드린과 키토산 농도의 영향-)

  • Kim, Min-Ji;Park, Jung-Woo;Lee, Shin-Hee
    • Fashion & Textile Research Journal
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    • v.6 no.5
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    • pp.660-666
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    • 2004
  • This article describes the change of hand value of chitosan crosslinked cotton fabrics. The chitosan crosslinked cotton fabrics were manufactured by mercerizing process using epichlorohydrin(ECH) as crosslinkins agent, 2% aqueous acetic acid as a solvent of chitosan and ECH, and 20% aqueous sodium hydroxide as a mercerizing agent and crosslinking catalyst. Cotton fabrics were dipped in the mixed solution of chitosan and ECH, picked up by mangle, mercerized and crosslinked in NaOH solution, and finally wash and dry. Mechanical and physical properties of the chitosan crosslinked fabric were investigated using Kawabata Evaluation System(KES) and other instruments. Tensile energy and tensile strain were decreased with the increase of the concentration of chitosan. Tensile resilience, compression resilience bending rigidity, bending hysteresis, shear stiffness, shear hysteresis, coefficient of friction, geometrical roughness, compression linearity, compressional energy, and thickness were increased with the increase of the concentration of chitosan. On the other hand, bending rigidity, bending hysteresis, coefficient of friction, geometrical roughness, compressional resilience, and thickness were increased with the increase of the concentration of crosslinking agent(epichlorohydrin).

A Study on the Physical Properties of Sappan Wood Dyeing Fabrics Treated by Rice Straw Ash Solution (잿물로 매염처리된 소방염포의 물성에 관한 연구)

  • 주영주
    • Journal of the Korean Society of Clothing and Textiles
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    • v.22 no.6
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    • pp.699-705
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    • 1998
  • This paper surveys the effect of rice straw ash solution to the physical properties of Sappan Wood dyeing fabrics. In the quantitative analysis of rice straw ash solution, the quantities of absorbed ingredients in fabrics were increased by bath pull treatment but the amount of absorption(K/S value) was increased by bath pH4.5 treatment. This is related to the metal ion. Among the metal ion, effect of Fe iou and Al ion were related. In case added extracted dye solution to mordants, the color dye solution became dark and increased reddish. The changes of mechanical properties of fabrics tensile resilience, bending rigidity(B), compressional resilience(RC) were increased. Generally mechanical properties were increased by rice straw ash solution treatment, specially bath pH9 treatment. Rice straw ash solution treatment of dyeing fabrics made the improvement in tensile strength and elongation and in the amount of absorption, dye ability, color fastness, mechanical properties, tensile strength, elongation.

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Asphalt Sealant Containing the Waste Lubricant Oil (폐윤활유를 이용한 아스팔트 실란트)

  • Kim, Seog-Jun;Ko, Kum-Jin
    • Elastomers and Composites
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    • v.44 no.1
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    • pp.69-75
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    • 2009
  • Asphalt sealants for the crack repair of asphalt concrete road were prepared using waste lubricant oil in this work. The waste lubricant oil was compounded with asphalt(AP-5), SBS triblock copolymer, a tackifying agent(petroleum resin), and antioxidants. Cone penetration, softening point, ductility, elongation by tensile adhesion, and resilience of asphalt sealant compounds were measured. Cone penetration of asphalt sealant compounds increased with the increase of waste lubricant oil content while their softening point, ductility, and resilience decreased. By the addition of talc as an extender, softening point and resilience of asphalt sealants increased, but cone penetration, ductility, and elongation by tensile adhesion of those decreased with the proportion of talc content. The most economic asphalt sealant which could pass an ASTM specification could be manufactured by the big decrement of petroleum resin content.

A Study on the Mechanical Properties to the Weight Reduction Rate of PET Fabrics(II) (PET직물의 감량률에 따른 역학적 특성변화에 관한 연구(II))

  • 이희준;이민수;김승진;홍성철;김석근;전계현
    • Textile Coloration and Finishing
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    • v.10 no.6
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    • pp.10-19
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    • 1998
  • This study surveys the mechanical properties such as tensile and compressional properties to the weight reduction rate of PET fabrics with various weft linear densities, weft t.p.m. and desities. 18 kinds of plain and 12 kinds of satin weave fabrics were woven and processed with variation of weight reduction rate(0%, 12%, 25% and 30%) in dyeing and finishing processes. Tensile work, resilience and compressional work and resilience of these finished fabrics treated with different weight reduction rates were measured by KES-FB System and discussed with various wok linear densities, weft t.p.m., densities, and weight reduction rates.

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Physical Property Evaluation of Chitosan Mordanted Green Tea Dyed Cellulose - Focusing on the physical property changes upon the repetition of treatment -

  • Jung, Hye-Kyung;Kim, Sin-Hee
    • Journal of Fashion Business
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    • v.12 no.6
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    • pp.61-72
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    • 2008
  • The UV-protection effect of green-tea dyed fabrics was reported in our previous studies. The chitosan was used as a natural mordant of cellulose fiber for green tea extract because chitosan is a natural bio-polymer. The increase in the UV protection property of summer cellulose fabrics, cotton and linen, upon the repetition of chitosan mordanting and green tea dyeing was observed. However, the physical property change would be followed by this repeated wet processing of the cellulose fabric. Therefore, the physical changes of the chitosan mordanted and green tea dyed cotton and linen fabrics were evaluated by KES-FB system. Tensile, shear, bending, compression, and surface characteristics were tested upon the repetition of mordanting and dyeing treatments. Linearity of tensile force increased in the treated cotton and linen samples. Tensile energy and resilience decreased in all treated fabrics. Shear stiffness increased in the treated cotton and linen in general. Shear hysteresis was increased in all cotton samples and some linen samples. In cotton, the bending rigidity in all treated cottons increased except C3G3. As the chitosan mordanting numbers increased, the bending rigidity tended to decrease. In linen, the bending rigidity and hysteresis increased in all treated samples. Compressional energy and resilience increased as the number of chitosan mordanting increased both in cotton and linen. This could be the result of the increase in thickness upon chitosan mordanting. Surface coefficient of friction increased in the treated cotton and linen in general. Surface roughness tended to increase in cotton.