• Proceedings of the Korean Fiber Society Conference
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• 1998.04a
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• pp.249-252
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• 1998

니들펀칭 부직포는 구성 섬유소 집합체(web)를 바늘에 펀칭시켜 통과시킴으로써 섬유소간의 물리적인 결합력을 이용하여 제작한 섬유 구조물을 말한다. 니들펀칭 부직포의 물성에 미치는 인자는 크게 다음 세가지라고 볼 수 있다. 첫째, web을 구성하는 섬유의 물성이다.[1-4] 즉, 구성섬유의 인장성질이나 단면의 모양, 크림프의 존재유무, 섬도, 섬유길이, 마찰특성들이 부직포의 물성에 직접적인 영향을 준다.(중략)

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.11a
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• pp.15-15
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• 2011

본 연구는 기존의 하우스 랩이 가지는 방풍, 방수 기능 외에 복사열 차단성, 열반사성, 통기성, 투습성, 난연성, 방수성 및 단열성 등의 다기능성이 발현되는 우수한 건축용 하우스 랩을 제조하는 목적으로 시스-코어 섬유로 이루어진 부직포층, 통기성 합성수지 필름층, 니들펀칭 복합 부직포층 및 고분자 필름이 일면 또는 양면에 코팅된 내식성 알루미늄 필름층이 순차적으로 적층되고 핫-멜트 라미네이팅에 의하여 합지 된 다기능성 하우스 랩 및 그의 따른 제조방법에 관한 것이다. 상기 니들펀칭 부직포 내부에 포함 된 아라미드 섬유에 의해 우수한 난연효과를 가지며, 통기성 필름에 의하여 투습방수 기능을 가질 수 있으며, 니들펀칭 부직포층에 다량의 공기가 함유되어 보온성이 우수하고, 내식성 알루미늄 필름층이 가진 빛에 대해 우수한 방사성으로 복사열을 차단하여 단열효과를 나타내는 하우스 랩을 제조하였다.

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.337-340
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• 2002

부직포의 제조공정은 기본적으로 웹성형공정과 웹결합공정으로 구성되어 있다. 웹성형공정에는 단섬유를 중심으로 건식법과 습식법 및 장섬유를 중심으로 스펀본드법[1]이 있다. 웹결합공정에는 니들펀칭과 접착제, 열응착, 스펀레이스 및 스티치공정 등 여러공정법이 응용되고 있다. 이러한 공정의 선택은 개발목표로 하는 최종제품의 특성과 용도에 의해 결정된다. 일반적으로 동일중량을 기준에서 볼 때, 고강도 고강제조공정상 경량제품에는 주로 열융착방법을 선택하며 중량제품에는 니들펀칭공정을 사용하고 있으며 그 한계는 웹결합공정 특성상 약 150g/$m^2$ 내외이다. (중략)

• Proceedings of the Korean Society For Composite Materials Conference
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• 2002.05a
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• pp.184-187
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• 2002

Compression molding was specifically developed for replacement of metal components with composites. As the mechanical properties of the products are dependent on the separation and orientation, it is important to research the fiber mat structure and molding conditions. In this study, the effects of the fiber mat structure(NP: 5, 10, 25punches/$\textrm{cm}^2$) and the mold closure speed($\dot{\textrm{h}}$=0.1, 1, 10mm/min) on the viscosity of composites were discussed. The composites is treated as a Non-Newtonian power-law fluid. The parallel-plate plastometer is used and the viscosity is obtained from the relationship between the compression load and the thickness of the specimen.

• Composites Research
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• v.12 no.5
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• pp.31-39
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• 1999

Glass-fiber reinforced polymeric composites provide the desitable properties of high stiffness and strength as well as specific weight. Hence, they have become some of the most important materials in several industries. These composites can be grouped into thermoplastic and thermoset composites, with thermoplastic composites having several advantages over thermoset composites in mechanical properties and processing. As a result, the study of the material behavior and forming techniques of such composites has attracted considerable attention in recent years. When the continuous fiber-reinforced polymeric composites are molded by flow molding, the molded parts leads to be nonhomogeneity and anisotropic because of the separation and orientation of fibers. As the characteristics of the products are greatly dependent on the separation, it is very important to clarify the separation in relarion to molding conditions, fiber mat structures and mold geometry. In this study, the effects of the mold geometry and the fiber mat structure on the compression moldability are studied using the cup-type molding.

• Proceedings of the Korean Fiber Society Conference
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• 1997.10a
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• pp.234-237
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• 1997

• Applied Chemistry for Engineering
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• v.20 no.5
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• pp.561-564
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• 2009

Filter media finely interspersed with activated carbons were prepared by a needle punching process without using chemical binders. Their characteristics were investigated efficiently to abate environmentally harmful gas such as acetaldehyde, and were compared with those of cabin air filter coated with activated carbons by using chemical binders. These combination filters were installed on a vehicle fan placed in a test chamber of capacity similar to the interior volume of a commercially available passenger car, and the efficiency of acetaldehyde abatement was measured as a function of time. The filter utilizing chemical binders showed somewhat better performance for the elimination of acetaldehyde despite the adverse effect of the chemical binder that would clog the micropores of the activated carbons. It turned out that the needle punching process had the activated carbons agglomerated due to hydrophobic interactions, resulting in a relatively larger void area than that of the filter utilizing chemical binders.

• Korean Journal of Plant Resources
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• v.13 no.3
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• pp.208-212
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• 2000

The effect of heat covering materials during cultivation of Shigyoku grape was examined on the effect of protection from freezing damage, labor reduction, and disease resistance during the wintering. This experimentwas accomplished using different combination of heat covering materials from the end of Nov as follows: straw and heat conservation cover B, kilding, color fabric A, and white needle punching fabric. Capacity of heat conservation was the least form white needle punching fabric, and the differences of other materials was slight. Early sprouting occurred by the treatment with heat conservation cover B, and the rate of sprouting was about 70.7% after 9 days of sprouting, showing 2.3-12.5% increase. Growth effect was not differ between heat conservation materials. Disease and insects occurred by the in dice 3.0-3.2 of crown gall from the heat conservation cover B treatment. Other damages were not observed or very little from other treatments. Demand of labor during steps of these treatments was more observed by 6% for kilding than heat conservation cover B, and those of color fabric A and white needle punching fabric were reduced by 6 and 15%, respectively.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2003.10a
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• pp.63-66
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• 2003

The effect of punching density and material composition on the tensile properties and optimum condition of manufacturing of carbon needle punched perform was studies. The interlaminar tensile strength were increased but the intralaminar tensile strength were decreased with increasing punching density. In the case of the performs composed of continuous oxi-PAN fabrics, there was a considerable improvement of the interlaminar and intralaminar tensile strength.

• Proceedings of the Korean Fiber Society Conference
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• 1998.10a
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• pp.352-355
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• 1998

토목섬유제품 중에서 차수재조 널리 사용되는 지오멤브레인은 1$\times$$10^{-12}$의 낮은 투수계수를 갖고 있지만 시공전후 찢어지거나 구멍이 뚫리게 되면 침출수의 유출이 발생하여 환경오염을 일으키게 된다. 이를 보완하기 위해 친수성과 팽윤성이 큰 벤토나이트 물질을 이용한 Geosynthetic Clay Liner(GCL) 복합재료가 개발되었다. GCL은 지오텍스타일이나 지오멤브레인사이에 벤토나이트를 충진시키고, 접착제 또는 니들펀칭(needle-punching)이나 스티칭(stitching)과 같은 기계적인 방법으로 결합한 복합재료이다. (중략)