• Title/Summary/Keyword: adhesive strength

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Adhesive Strength Characteristics of the Curing Time and Test Temperature for Liquid Waterproofing Membrane in Concrete Bridge Deck (콘크리트 교면 도막 방수재의 양생기간 및 시험체 온도에 따른 접착 특성)

  • 조병영;박동협;신주재;김영근
    • Proceedings of the Korea Concrete Institute Conference
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    • 2003.11a
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    • pp.553-556
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    • 2003
  • This study is analyzed about the factor of adhesive strength characteristics, curing time, asphalt application, test temperature which are liquid waterproofing membrane of rubber-asphalt and chloroprene-rubber type for concrete bridge deck. According to the results, curing time is shorter, adhesive strength is less in chloroprene-rubber type. And also chloroprene-rubber and rubber-asphalt type are showed high adhesive strength in low temperature.

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A Case Report of PNF Strategy Applied ICF Tool on Upper Extremity Function for Patient Adhesive Capsulitis (유착성 관절낭염 환자의 상지 기능에 대한 ICF Tool을 적용한 PNF 중재전략의 증례보고)

  • Kang, Tae-Woo;Kim, Tae-Yoon
    • Journal of the Korean Society of Physical Medicine
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    • v.12 no.4
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    • pp.19-28
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    • 2017
  • PURPOSE: The purpose of this study was to describe the Proprioceptive Neuromuscular Facilitation (PNF) Intervention strategy applied International Classification of Functioning, Disability and Health (ICF) Tool about strength, range of motion, scapular stability, pain and function of shoulder for patients with adhesive capsulitis. METHODS: The data was collected by patient with adhesive capsulitis. The patient was a 50-year-old male diagnosed with right shoulder with adhesive capsulitis. We applied the PNF Intervention strategy applied ICF Tool to patient with adhesive capsulitis. PNF interventions were consisting of such as combination of isotonic and stabilizing reversal technique and various positions. PNF interventions were applied, such as those aiming at decreasing pain and disability and increasing range of motion and function for the four weeks. Parameters of result were collected for strength, range of motion, scapular stability, pain and function of shoulder using the hand held dynamometer, goniometer, lateral scapula slide test, and shoulder pain and disability index, respectively. RESULTS: Clinical benefits were observed the patient with adhesive capsulitis for strength, range of motion, scapular stability, pain, and function of shoulder. The patient with adhesive capsulitis improved strength, range of motion, scapular stability, pain, and function of shoulder. CONCLUSION: Patient reported improved strength, range of motion, scapular stability, pain, and function of shoulder after intervention.

A Study on Fabric Adhesive Interlining(3) (직물접착심지에 관한 연구(3))

  • Cho, Cha
    • Journal of the Korean Home Economics Association
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    • v.35 no.1
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    • pp.257-262
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    • 1997
  • In this thesis considering the problems shown in the usage of interlining of clothes and in the process of sewing the breaking away strength which is meant by adhesion is analysed by experimennt in which Polyamide content is dealed with at the 5 level to raise the adhesive strength by using the one-sided non woven adhesive interlining made in this country as the samples. After examing the optimum in the process of Cotton and polyester fabrics and adhered fabrics practical for blouse and jacket and analysing the breaking away strength the wanted property of matter and the change with the repeated laundry We reach at the following results. 1. The adhesive strength of the two adhered fabrics were strongly appeared in order of cotton>polyester. 2. The order of the breaking away strength by the interlinings of adhesive fabrics was A5> A4> A3> A2> A1. 3. The breaking away strength of the two adhered fabrics was weakened by the repeated laundry and the breaking away phenomena were fewer under the most suitable conditions than the various conditions.

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Evaluation of Environmental Fatigue Strength in Adhesive Bonding of Different Materials (이종재료 접착제 접합부의 환경 피로강도 평가)

  • 임재규;이중삼;윤호철;유성철
    • Journal of Welding and Joining
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    • v.20 no.5
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    • pp.99-105
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    • 2002
  • One of the important advantage of adhesive bonded joint can combine the different materials. The joint that bonded by structural adhesive bond must keep a large force and its strength is affected by some environmental factors such as temperature and submergence time in water. In order to advance the fatigue strength of adhesive bonded joint, mostly put a surface treatment on the surface. This study was researched the effect of air temperature, submergence time, submergence temperature and surface treatment on the fatigue strength. We found that submergence temperature has the most effect and low plasma treatment specimens have the most fatigue strength.

A Study on the bonding strength of the after laundering of the adhesive interlining according to laundering methods. (직물접착심지의 세탁방법에 따른 세탁 후 접착강도에 관한 연구)

  • 박채련
    • Journal of the Korean Home Economics Association
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    • v.34 no.5
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    • pp.41-48
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    • 1996
  • The purpose of this paper was to identify bonding strength by laundering methods(dry and wet) of the after laundering of the adhesive interlining. The results of this study were as fallows. 1.As laundery repeated it revealed that the bonding strength was decreased to some degree regardless of the kinds of face cloth, laundering methods & adhesive interlining. 2. Bonding strength of woven adhesive interlining after and before ironing is different by its weave: A1>A3>A2. 3. Bonding strength before cleaing is smaller than that after laundering with ironing. 4. As for laundering methods, while dry cleaning is excellent with little influence on bonding strength. It doesn't deform the shapes of dress, in cases of woven adhesive interlining.

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A Study on Effect of Shotcrete Adhesive Strength on Large Section Rock Tunnel Stability (대단면 암반터널의 안정성에 미치는 숏크리트 부착강도의 영향에 관한 연구)

  • Chang, Seok-Bue;Hong, Eui-Joon;Moon, Sang-Jo
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.7 no.4
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    • pp.305-311
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    • 2005
  • Shotcrete adhesive strength in large section tunnels in jointed rock masses plays an important role in preventing rock block from falling and shotcrete debonding due to blasting vibration. Nevertheless, it has not been considered as a major factor such as shotcrete compressive strength in design and construction. For this reason, the purpose of this study is to analyze the effect on shotcrete adhesive strength for large-sectioned tunnels. First, the parametric study using numerical model similar to Holmgren's punch-loaded test was executed for various range of adhesive strength. It shows that the shotcrete bearing capacity is linearly proportioned to the adhesive strength between shotcrete layer and blocks. And then, distinct element analysis of a jointed rock tunnel for an adhesive strength of 1 MPa and a conventional fully-bonded condition between the shotcrete layer and the excavation face was compared in order to evaluate the effect of the shotcrete adhesive strength.

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Evaluation of Shear Bond Strength and Microleakage of Self-adhesive Giomer

  • Gwangsuk Kim;Juhyun Lee;Haeni Kim;Howon Park
    • Journal of the korean academy of Pediatric Dentistry
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    • v.50 no.4
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    • pp.434-442
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    • 2023
  • This study was aimed to evaluate the bonding performance of a self-adhesive giomer and compare it to a conventional flowable composite resin with regard to shear bond strength and microleakage in enamel and dentin. Healthy human premolars extracted for orthodontic treatments were used in the study. For shear bond strength tests, enamel and dentin specimens were prepared for the study group with self-adhesive giomer and for the control group with conventional flowable composite resin with a 5th-generation adhesive system. A universal testing machine was used to measure the shear bond strength. For the microleakage tests, specimens were immersed in a 2% methylene blue solution for 24 hours, cut into sections, and evaluated with a stereomicroscope for the extent of dye penetration. The results of the study showed no statistically significant difference in shear bond strength between the self-adhesive giomer and the conventional flowable composite resin in enamel (p = 0.091). On the contrary, in dentin, the self-adhesive giomer showed significantly lower shear bond strength (p < 0.0001). The microleakage of the self-adhesive giomer was significantly higher than that of the conventional flowable composite resin (p = 0.002). Self-adhesive giomer is considered useful for restoring small cavities at the enamel level of pediatric patients by reducing chair time with the advantage of a simple bonding process. However, as the study was conducted in a laboratory setting, further research in a clinical environment is deemed necessary.

Effect of moisture and drying time on the bond strength of the one-step self-etching adhesive system

  • Lee, Yoon;Park, Jeong-Won
    • Restorative Dentistry and Endodontics
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    • v.37 no.3
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    • pp.155-159
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    • 2012
  • Objectives: To investigate the effect of dentin moisture degree and air-drying time on dentin-bond strength of two different one-step self-etching adhesive systems. Materials and Methods: Twenty-four human third molars were used for microtensile bond strength testing of G-Bond and Clearfil $S^3$ Bond. The dentin surface was either blot-dried or air-dried before applying these adhesive agents. After application of the adhesive agent, three different air drying times were evaluated: 1, 5, and 10 sec. Composite resin was build up to 4 mm thickness and light cured for 40 sec with 2 separate layers. Then the tooth was sectioned and trimmed to measure the microtensile bond strength using a universal testing machine. The measured bond strengths were analyzed with three-way ANOVA and regression analysis was done (p = 0.05). Results: All three factors, materials, dentin wetness and air drying time, showed significant effect on the microtensile bond strength. Clearfil $S^3$ Bond, dry dentin surface and 10 sec air drying time showed higher bond strength. Conclusions: Within the limitation of this experiment, air drying time after the application of the one-step self-etching adhesive agent was the most significant factor affecting the bond strength, followed by the material difference and dentin moisture before applying the adhesive agent.

Effect of Degree of Interfacial Interlinking on Adhesive Strength and Fracture Morphology of Rubber Layers (고무층간 가교정도가 접착강도 및 파괴형태에 미치는 영향)

  • Kim, Hyeon-Jae;Kaang, Shin-Young;Nah, Chang-Woon
    • Elastomers and Composites
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    • v.34 no.1
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    • pp.31-44
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    • 1999
  • Interfacial adhesive strength between the fully-crosslinked and partially-crosslinked rubber layers were Investigated at the temperature range of $30{\sim}120^{\circ}C$ for four different rubbers(NR, SBR, EPDM, BIMS). The surfaces of interfacial failure were also investigated using a scanning electron microscopy(SEM). The physical interlinking played a major role in the adhesive strength between the fully-crosslinked rubber layers. When a partially-crosslinked rubber layer was bonded to the fully-crosslinked one, the chemical as well as the physical interlinking affected the adhesive strength. NR showed a "interfacial knotty tearing" pattern, while EPDM showed a typical "cross-hatched" one when the adhesive strength approached to the cohesive tear strength of each material.

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Effect of Adhesive Shape on the Strength of Aluminum/Polycarbonate Joint (접착부 형상이 알루미늄/폴리카보네이트 접합재의 강도에 미치는 영향)

  • Seo, Do-Won;Kim, Hyo-Jin;Choi, Jun-Yong;Hoa, Vu cong;Lim, Jae-Kyoo
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.1039-1044
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    • 2003
  • Adhesive-bonded joints are widely used in the industry. Recently aircraft applications of adhesive bonding joints have been increased extensively in automobile and air industry. Because adhesives which are available for structural applications have been developed a lot and understanding of adhesive bonding has been improved so much. In this study, as the fundamental research of design of adhesive bonding joints, this study considers specimen shape are affect strength and durability of Al/Polymer lap joints. In this research, cross head speed difference were concerned to evaluate their effects on the adhesive strength. Cross head speed makes a change 0.05mm/min, 0.5mm/min, 5mm/min. The result is load-displacement diagram showed brittleness fracture tendency. Fracture tendency that is shown enough on stress distribution of trigonal single lap joint and trigonal edged single lap joint occur the inside of adhesive.

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