• 한국자동차공학회논문집
• /
• 제15권3호
• /
• pp.41-46
• /
• 2007

Lightweight multi-layered boards with high stiffness for the automotive interior trims were developed, which were composed of a single material. The boards were constructed in the form of substrate/core/substrate with newly developed materials. The materials which have high tensile strength and elongation were selected for the substrate materials, and those which have high compressive strength and low density were selected for the core materials. 25 types of multi-layered boards were fabricated using the selected substrate and core materials. The compatibility with the skin materials, the formability and the tensile strength and flexural strength of the specimens were evaluated. The results show that three types of multi-layered boards(Kenboard/EPP foam/Kenboard, Twintex/PP honeycomb/Twintex, Curv sheet/EPP foam/Curv sheet) are appropriate for the automotive interior trims. Considering the ease of materials supply and the economical aspect, Kenboard/EPP foam/Kenboard is thought to be the most realistic alternative.

• 패션비즈니스
• /
• 제25권3호
• /
• pp.51-70
• /
• 2021

The study aims to evaluate changes in textiles for automotive interior and suggest directions that the textile-development should take in order to achieve sustainability, and enter a circular economy system in the future. The main content and results of the study are as follows: First, we cover the overall sustainability study in the fashion and textile fields; in particular, the certification system is well established through the provision of information on the whereabouts of products to consumers and verification by external environmental auditors. Second, we considered the criteria of C2C in order to derive the necessary criteria for sustainability certification in the field of textiles. Third, we looked at the latest development trends of textile materials for automobile interiors which were divided into three categories: natural originated materials, circular economic consideration materials, and functional supplementary lightweight materials. In addition, we identified to what extent the trend of changes aggregated in the examples was satisfied and what was lacking when applied to the Basic criterion of C2C. As such, this study links and applies the sustainability criteria pursued in the fashion and textile fields to the textile for automotive interior materials, suggesting a direction for the textile field for automotive internal materials in the future. Based on the results of this study, it is hoped that studies on textiles for automotive interior considering the net economy will continue, and practical development in the industry will be realized.

• 한국자동차공학회논문집
• /
• 제10권5호
• /
• pp.138-146
• /
• 2002

The new type of vibration reduction material far an automotive interior, which is spray-type liquid material, is developed in this study The new material has better damping property and lower mass density than other damping materials, for example asphalt sheet. It can be sprayed by an automatic robot, so it is expected to improve productivity and cut down manpower. And it solves a poor adhesion problem and makes an automotive to be lightweight by optimizing spray process. So, It is a next generation automotive vibration reduction material. In this paper, the chemical process for making the new damping materials is described. And then, the damping properties of the vibration reduction materials are analyzed by modal testing of damping treatment specimens. The new vibration reduction materials have good damping properties than asphalt sheet in the experimental results.

• 한국생산제조학회지
• /
• 제19권2호
• /
• pp.260-266
• /
• 2010

Today's consumers are looking for emotional design which can fulfill their own potential desire. Emotion varies according to individual circumstance, age, sex, culture, education, profession and so on. Automotive instrument panel design is the most important part of interior design, because it affects the impression of interior design and has the equipments for safety, entertainment and various information. Thus, this study was performed to apply emotional design to automotive instrument panel which is the most important part of automotive interior, and find the best bonding conditions to build instrument panel efficiently by comparing mechanical properties in thermoplastic resin of polyethylene (PE) adhesion. Satisfactory adhesion was executed in ultrasonic welding for the same materials of PE. The best welding conditions were found to be welding time of I second, welding pressure of 250 kPA for PE-PE welding. Dissimilar materials were adhered when adhesion and ultrasonic welding were performed at the same time.

• 한국안전학회지
• /
• 제13권2호
• /
• pp.88-95
• /
• 1998

Five parts of the automotive interior materials were sampled to determine their combustion characteristics. Oxygen Indexer, Smoke chamber, Differential Scanning Calorimeter(DSC) were used as the analysis apparatus. All LOI values of samples appear less than 21. The combustion phenomena of the interior materials primarily depends on properties of each layer material. The amount of generated smoke are reached the maximum value within 30 - 90sec after ignition. The experimental results of combustion characteristics and DSC of H/Line also indicated that the layer of foam was melt first and it caused the propagation of flame through the sample. The combustion characteristics of multi-layer materials primarily depends on thermal characteristics of single layer material.

• 오토저널
• /
• 제14권4호
• /
• pp.68-78
• /
• 1992

Vibration and vibro-acoustic characteristics of body panels enclosing the vehicle interior cabin are tested and analyzed for effective application of sound proofing materials. A set of deadener and insulation packages are proposed based on the experimentally evaluated and categorized contributions of noise radiating panels. The suggested packages are applied to a prototype vehicle, and a refined acoustic quality is achieved. A systematic experimental procedure proposed in this study can be a good tool in tuning the acoustic quality of prototype vehicles within a limited development period.

• 한국정밀공학회지
• /
• 제26권3호
• /
• pp.81-87
• /
• 2009

Lightweight board has been used for manufacturing various fields of automotive interior trims for years. The GMPU board was constructed with glass fiber mat, honeycomb and polyurethane foamed using polyol and isocyanate materials which were sprayed by robot that is interlocked foaming machine. For more lightweight and cost reduction this paper shows how to optimize GMPU process parameters that related to foaming condition, robot position and robot velocity for polyurethane weight. The results show that flexural strength and modulus of board's specimens were evaluated by robot velocity and moving pattern. Based on that, a innovative process was developed for more lightweight and cost reduction.

• Composites Research
• /
• 제37권2호
• /
• pp.115-125
• /
• 2024

환경에 대한 범세계적인 문제와 관심이 고조되는 가운데 자동차 산업에서도 친환경 소재로의 전환이 가속화되고 있다. 자동차 산업에서 친환경 복합재료는 차량 내부 및 비 구조 부품에 주로 사용된다. 특히 천연섬유 복합재료는 차량의 경량화로 연료 소비와 온실가스 배출을 줄이는데 도움을 주며 재활용이 가능하고 우수한 열적 특성과 내구성을 가지고 있어 자동차 내장 부품에 적합하다. 아울러 생산 비용 절감과 지속 가능성은 천연섬유 복합재료의 주요 장점이다. 친환경 복합재료 시장은 2022년부터 2030년까지 연평균 성장률 15.3%로 864억 3천만 달러 규모로 성장할 것으로 기대되며, 천연섬유 복합재료 시장은 2023년부터 2028년까지 연평균 5.3% 성장해 4억 2,400만 달러에 이를 것으로 예상된다. 본 리뷰 논문에서는 천연섬유 복합재료를 중심으로 차세대 자동차용 친환경 복합재료의 연구 동향과 실제 자동차 산업에서의 적용에 대해 탐구한다.

• 접착 및 계면
• /
• 제8권1호
• /
• pp.1-7
• /
• 2007

본 연구에서는 자동차 실내에서 발생되는 VOCs 성분 및 농도를 분석하기 위해 승용차와 RV차에 대해서 각각 15일, 30일, 45일, 60일 경과한 차량을 대상으로 시험하였다. 그 결과 TVOC는 승용차와 RV차 모두 기준치보다 2~8배 상회하였으며 승용차보다는 RV차량이 더 많이 검출되었다. 특히 톨루엔의 경우 30일 경과 후부터 급격히 감소되었으며 60일 경과 후에도 기준치보다 높게 검출되었다. 크실렌의 경우 45일 경과 후 기준치 이하로 검출됨을 확인하였다. 본 연구결과를 볼 때 자동차 내장부품의 무용제화 및 수성화 대체기술 개발이 시급함을 알 수 있었다. 아직 국제표준화 되어 있지 않은 VOCs의 시험방법표준화를 통하여 성분, 농도, 인체유해성을 충분히 분석하여 대체함으로써 친환경 자동차 생산에 기여할 수 있을 것으로 사료된다.

• 한국표면공학회지
• /
• 제51권1호
• /
• pp.40-46
• /
• 2018

The light-weight of the research and development materials is actively carried out by overseas automobile companies and technology development continues in Korea. For the sake of fuel efficiency, the development of lightweight technology by improving the manufacturing method has been very effective. Recently, to maximize the effects of light weight, automotive interior parts have been applied by the micro-cellular injection molding using supercritical fluids and we call the Mucell manufacturing. This technique causes a problem in the quality of the surface of the products, because the shooting cells are revealed as the surface layer of the products by forming micro cells at the center of the products during injection molding. To overcome these phenomenon, we increased the temperature of injection molding using joule heating until critical value. In this study, we have predicted the problem of Mucell injection molding through the finite element analysis as changed the temperature by joule heating. From the result of finite element analysis, we have determined the optimized process and made the injection mold included electric current heating system with Mucell manufacturing analyzed the surface characteristics of the injection product according to changing mold temperature.