• Title/Summary/Keyword: Structural Adhesive

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A Study on the Thermal Comfort and Air Permeability of Adhesive Fabrics Before and After Adhesion of Nonwoven Adhesive Interlining (부직포 접착심지 부착 전후의 접착포의 열적 쾌적성과 공기투과성에 관한 연구)

  • 김경희;김승진
    • Journal of the Korean Society of Clothing and Textiles
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    • v.22 no.7
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    • pp.807-815
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    • 1998
  • Functions of interlinings to the shell fabric are to improve the garment formability for a beautiful silhouette and elastic potential to the deformed fabric during wearing, and also are to enhance appearance and wearing properties of garment. The objective of this study is to analyse the thermal properties of nonwoven fusible interlining to the thin worsted fabric with various fabric structural parameters. For the purpose fo this study, eight specimens with various weft yarn twists and weft densities of thin worsted fabrics are prepared. Three nonwoven fusible interlinings with different structure which were made by Nylon/Polyester were used for adhering to the thin worsted fabrics. Thermal properties of these 24 adhesive fabrics fused with 3 nonwoven interlinings are measured by KES-F7 System for analysing the thermal suitability of nonwoven fusible interlinings to the thin worsted fabrics with various fabric structural parameters. And air permeability, which was measured by KES-F8-API, of 24 nonwoven adhesive interlining fabrics was also analysed and discussed with the various kinds of nonwoven interlinings and fabric structural parameters.

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A Study on the Structural Analysis of Joint Part in Accordance with Adhesive Length of a Composite Rocket Motor Case (복합재 연소관의 접착 길이에 따른 체결부의 구조해석)

  • Jeon, Kwang-Woo;Shin, Kwang-Bok;Hwang, Tea-Kyung
    • Journal of the Korean Society of Propulsion Engineers
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    • v.16 no.3
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    • pp.90-96
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    • 2012
  • In order to determine optimal design length of adhesive joint of a composite rocket motor case, stress analysis of joint part according to changes of adhesive length was done. Adhesive length has a range of 50 mm to 300 mm as design variables. The ratio of adhesive length without any stress gradient to initial non-stressed adhesive length was determined as evaluation criteria for selection of adhesive length, which called "stress gradient length ratio". The numerical result showed that stress gradient length ratio of joint part with adhesive length of more than 200 mm was increased very slowly with increase of adhesive length. It means that adhesive length of about 200 mm could be the optimal dimension to ensure the structural safety of joint part against internal pressure of 2,500 psi.

Adhesion Properties on the Molecular Weight and Various Substrates of Multi-layered Structural Acrylic Adhesive (다층구조형 아크릴 점착제의 분자량 및 피착재 종류에 따른 접착특성)

  • Kim, Dong-Bok
    • Polymer(Korea)
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    • v.39 no.3
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    • pp.514-521
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    • 2015
  • In this study, we would like to describe peel strength and dynamic shear property on various substrates of multi-layered structural double-sided adhesive tape with or without adhesive (AD) prepared by UV curing for an automobile, construction, and display junction. According to adapt the adhesive, the peel and dynamic shear strength of adhesion tape prepared with acrylic foam or various plastic substrates increased with increasing molecular weight, however, decreased over 650000 molecular weight. The adhesion property shows high value at the thin AD layer with decreasing temperature. The interface property shows highest at MW 615000 (AD-4), and the interface junction below MW 615000 resulted to divide from acrylic foam and adhesive layer. From this study, the multi-layered structural double-sided adhesive tapes seem to be a useful for industrial area such as a low surface energy plastic material and curved substrate.

The Effect of Nano Functionalized Block Copolymer Addition on the Joint Strength of Structural Epoxy Adhesive for Car Body Assembly (차체 구조용 에폭시 접착제의 접합강도에 미치는 나노 기능성 블록공중합체 첨가의 영향)

  • Lee, Hye-rim;Lee, So-jeong;Lim, Chang-young;Seo, Jong-dock;Kim, Mok-soon;Kim, Jun-ki
    • Journal of Welding and Joining
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    • v.33 no.4
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    • pp.44-49
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    • 2015
  • The structural epoxy adhesive used in car body assembly needs the highest level of joint mechanical strength under lap shear, T-peel and impact peel conditions. In this study, the effect of nano functionalized block copolymer addition on the impact peel strength of epoxy adhesive was investigated. DSC analysis showed that the addition of nano functionalized block copolymer did not affect the curing reaction of epoxy adhesive. From single lap shear test, it was found out that the addition of nano functionalized block copolymer slightly decreased the cohesive strength of cured adhesive layer. The addition of nano functionalized block copolymer showed beneficial effect on T-peel strength by changing the adhesive failure mode to the mixed mode. However, the addition of nano functionalized block copolymer just decreased the room temperature impact peel strength. It was considered that the addition of nano functionalized block copolymer could have effect on disturbing the crack propagation only for the case of slow strain rate.

Effects of Tape Thickness and Inorganic Fillers on the Adhesion Properties of Double-sided Acrylic Adhesive Tape by Ultraviolet Curing (자외선 경화형 아크릴 양면 점착테이프의 두께 및 무기물 충전제 종류에 따른 접착특성)

  • Kim, Dong-Bok
    • Polymer(Korea)
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    • v.38 no.3
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    • pp.397-405
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    • 2014
  • To manufacture of high-performance semi-structural double-sided adhesive tape, 2-ethylhexyl acrylate (2-EHA) and acrylic acid (AAC) were used, and the syrup was prepared by UV irradiation in this study. The effects of the thickness, various inorganic filler contents, and filler types on the semi-structural properties of acrylic double-sided adhesive tape were investigated. The peel strength increased with increasing thickness and wetting time. In case of the thin thickness (under $250{\mu}m$) with decreasing true density of inorganic filler, the peel strength increased with increasing wetting time. The initial peel strength showed a higher value at a big size of inorganic filler, and the filler's size in adhesive tapes was confirmed by SEM images. The peel strength and dynamic shear strength increased as a proportional relationship with various inorganic fillers and contents, and these inorganic fillers in $0.1{\mu}m$ thickness indicated more effect on the dynamic shear strength of double-sided adhesive tape. From these results the thin acrylic double-sided adhesive tape determined to be use for applications as a high-performance semi-structural.

Effect of Temperature and Immersion Time on the Environmental Adhesive Strength of Adhesively Bonded Joints of Rolled Steel Sheet (압연강판 접착제 접합부의 환경 접합강도에 미치는 온도 및 침수시간의 영향)

  • Song, Jun-Hee;Lee, Hee-Jae;Lim, Jae-Kyoo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.26 no.12
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    • pp.2662-2669
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    • 2002
  • Recently structural applications of adhesive bonding method have been increased extensively in automobile industry. Adhesively-bonded joints which are used in automobile field are exposed to various environmental conditions. In this study, several environmental factors were concerned to evaluate their effects on the adhesive strength such as air temperature, water temperature, exposed time in water. The specimens are exposed for 1, 10 and 100 hours at various air temperatures to evaluate the effects of the air and water temperature on the adhesive strength. It is proved that the adhesive strength decrease with rising the air and water temperature, and the adhesive strength decrease steeply at the higher temperature with increasing the exposure time in water.

Shear Strength of an Aluminum Alloy Bonded with a DP-460 Adhesive: Single Lap-shear Joints

  • Kim, Hyun-Bum;Nishida, Tomohisa;Oguma, Hiroyuki;Naito, Kimiyoshi
    • Journal of Adhesion and Interface
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    • v.21 no.1
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    • pp.20-26
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    • 2020
  • Single lap-shear joints (SLJ) specimens with and without partial round fillets were fabricated to measure the average shear strength of adhesives. The effects of the length of the adherend on the SLJ specimens were also investigated. An epoxy adhesive was used to bond aluminum alloy. Tensile tests were performed on the adhesive bulk specimens to measure the mechanical properties. The finite element analysis (FEA) method was used to measure the adhesive stress distributions, i.e., the peel and shear stresses, on the bonded part. The experimental results revealed that the specimen consisting short length of adherend and without the partial round fillets exhibited the smallest average shear strength of adhesive among the investigated specimens. FEA revealed that the low average shear strength for the specimen with a short adherend length was caused by high stress concentrations on the adhesive at the edge of the bonded part.

Design of multulayer Composite-Antenna-Structures considering adhesive (접착필름의 영향을 고려한 다층 복합재료 안테나 구조 설계)

  • Kim D.S.;Hwang W.;Park H.C.;Park W.S.
    • Proceedings of the Korean Society For Composite Materials Conference
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    • 2004.10a
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    • pp.236-239
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    • 2004
  • 'Structural surface becomes an antenna.' This term, CAS, indicates antenna embedding in structural surfaces. The CAS is composed of several composite laminates and Nomex honeycombs, and microstrip antenna elements are inserted between layers with designed configurations. Constituent materials are selected considering electrical contributions as well as mechanical performances. Antenna design with adhesive films are impossible because cf their thin and rough distributions between honeycomb and substrate. Therefore, adhesive effects on antenna performances in CAS are experimentally investigated, CAS with targeted impedance and radiation characteristics are designed considering adhesive effects.

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