• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.46 no.10
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• pp.867-875
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• 2018

Conventional nylon wire cutting-type holding and release mechanisms (HRMs) are limited to securely hold the solar panel under launch environment as the size of the panel increases because the nylon wire is tightened directly on the surface of the solar panel. In this study, we proposed a nylon wire cutting-type HRM for 6U CubeSat's solar panel applying elliptic-shaped bracket with a Ball & Socket interface. The proposed HRM has the advantage of higher holding capability along in-plane and out-of plane directions of solar panel and simplicity in tightening process of nylon wire. The design drivers of structural design of CubeSat's solar panel with the proposed HRM were defined by structural analysis under launch loads. In addition, The design effectiveness of the proposed HRM was verified through the functional tests according to the thickness of nylon wire and the number of wire winding under various temperature conditions.

• Proceedings of the Korean Fiber Society Conference
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• 1998.10a
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• pp.272-275
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• 1998

나일론 6은 우수한 내마모성 및 내약품성의 장점을 가지고 있으나 내열성 및 저온 내충격성이 취약하여 타이어 코드와 같은 산업용 소재로 도입할 경우 많은 문제점이 있다 따라서 이러한 문제점을 개선시키려는 연구가 활발히 진행되고 있으며 그 중에서도 나일론 6의 내충격성을 향상시키기 위한 방법으로 나일론 매트릭스 내에 고무상의 물성을 갖는 고분자를 분산상으로 도입한 연구[1]가 있으며, 최근에는 고무상의 물성을 갖는 고분자 대신에 나일론의 분자 구조와 유사한 열가소성 탄성체를 도입한 연구가 있다. (중략)

• Journal of Aerospace System Engineering
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• v.15 no.5
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• pp.81-88
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• 2021

In general, a non-explosive nylon wire cutting-based holding and release mechanism has been used to store and deploy deployable solar panels of CubeSat. However, with this method, accessing the solar panel's access port for charging the cube satellite's battery and electrical inspection and testing of the PCB and payloads while the solar panel is in storage is difficult. Additionally, the mechanism must have a reliable release function in an in-orbit environment, and reusability for stow and deploy of the solar panel, which is a hassle for the operator and difficult to maintain a consistent nylon wire fastening process. In this study, we proposed a pin-puller-based solar panel holding and release mechanism that can easily deploy a solar panel without cutting nylon wires by separating constraining pins. The proposed mechanism's release function and performance were verified through a solar panel deployment test and a maximum separation load measurement test. Through this, we also verified the design feasibility and effectiveness of the pin-puller-based separation device.

• The Science & Technology
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• v.31 no.7 s.350
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• pp.74-74
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• 1998

1939년 미국에서 첫 선을 보인 나일론이 선풍적인 인기를 끌면서 일본의 대미 실크 수출이 큰 타격을 입게 되었다. 이에 따라 태평양전쟁을 일으킨 일본은 전쟁비용조달에 어려움을 겪게 되었고 대미감정이 더욱 악화됐다. 언론에서는 나일론이란 이름이 일본을 조소하기 위해 만든 것이라고 보도 했다.

• Journal of Aerospace System Engineering
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• v.17 no.2
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• pp.94-102
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• 2023

A nylon wire holding and release mechanism (HRM) has been widely used for deployable applications of CubeSat owing to its simplicity and low cost. In general, structural safety of solar panel with an HRM has been designed by performing structural analysis under a launch environment. However, previous studies have not performed thermal analysis for HRM in an on-orbit environment. In this study, Launch and Early Orbit Phase (LEOP) thermal analysis was performed to evaluate thermal stability of the mechanism in the orbital thermal environment of the pogo pin-based HRM applied to CubeSat. In addition, the effectiveness of the thermal design and performance of the pogo pin-based HRM were verified through a thermal vacuum test.

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.470-473
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• 2002

나일론 6은 유연한 분자사슬로 구성된 고분자이지만 분자간에 많은 수소결합을 형성 하고 있기 때문에 비교적 높은 용융온도를 가지고 있으나 연신성이 좋지 않고 고탄성의 섬유를 얻기가 어려우며 상온 및 저온에서의 내충격성도 취약하다고 알려져 있다[1]. 나일론 6의 이러한 단점은 각종 산업용소재로 이용할 경우 많은 문제점을 유발하게 되어 이를 극복하기 위한 연구들이 시도되고 있다. 그중 나일론 6에 액체암모니아나 요드 등을 이용하여 가소화 하거나 용제를 사용함으로써 해결하고자 하는 연구들이 진행되어 왔었다[2,3]. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.96-99
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• 2003

대표적인 합성섬유인 나일론은 강도, 탄성 및 내마모성이 우수하여 상업용으로 개발된 후 현재까지 지속적으로 발전하여 왔다. 또한 염색가공성이 우수하고 내약품성이 큰 장점을 가지고 있어 의류용 및 산업용 분야에서의 수요가 증대되어 1950년대 이후 생산량의 꾸준한 증가를 보이고 있다. 나일론 섬유의 염색에 있어 산성염료, 함금속염료 및 분산염료가 널리 이용되고 있으나 염색공정의 편리성, 색상 및 섬유-염료간의 염착결합력 관점에서 산성염료를 이용하여 나일론 섬유를 염색하는 것이 일반적 염색공정으로 채택되고 있다. (중략)

• The tire
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• s.109
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• pp.16-23
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• 1983

• The tire
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• s.110
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• pp.21-30
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• 1984

• Applied Chemistry for Engineering
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• v.4 no.4
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• pp.791-797
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• 1993

The application of the pervaporation process in biotechnology is rapidly growing. A two stage pervaporation process can be applied to the downstream processing of ethanol fermentation. In this paper, the second stage process in which the water-ethanol composition was 50:50 wt.% was investigated in more detail by using Nylon 4 and its blended membranes containing poly(vinyl alcohol) (PVA) and poly(acrylic acid) (PAA). Nylon 4 membranes were tested for compositions at 25, 30, and $35^{\circ}C$. Nylon 4 membranes had a separation factor of 4.18 with a permeability of $0.69kg/m^2hr$ at water-ethanol composition of 50:50 wt.%, while nylon 4-PVA blended membranes crosslinked by 5 Mrad gamma-ray irradiation showed a higher separation factor of 10.56 with permeability $0.55kg/m^2hr$ at the same composition. Nylon 4 also showed a high separation factor 27.8 at the ethanol-water azeotropic composition among the homopolymer membranes.