• ETRI Journal
• /
• 제33권6호
• /
• pp.864-870
• /
• 2011

As an isotropic conductive adhesive, that is, a hybrid Cu paste composed of Cu powder, solder powder, and a fluxing resin system, has been quantitatively characterized. The mechanism of an electrical connection based on a novel concept of electrical conduction is experimentally characterized using an analysis of a differential scanning calorimeter and scanning electron microscope energy-dispersive X-ray spectroscopy. The oxide on the metal surface is sufficiently removed with an increase in temperature, and intermetallic compounds between the Cu and melted solder are simultaneously generated, leading to an electrical connection. The reliability of the hybrid Cu paste is experimentally identified and compared with existing Ag paste. As an example of a practical application, the hybrid Cu paste is used for LED packaging, and its electrical and thermal performances are compared with the commercialized Ag paste. In the present research, it is proved that, except the optical function, the electrical and thermal performances are similar to pre-existing Ag paste. The hybrid Cu paste could be used as an isotropic conductive adhesive due to its low production cost.

• 대한한의학회지
• /
• 제41권3호
• /
• pp.151-161
• /
• 2020

Objectives: The purpose of this study is to report the improvement of multiple rib fracture after korean medical treatment; adhesive treatment and herb-medicine treatment. Methods: A patient with multiple rib fracture was treated with Daewhangchija-paste(大黃梔子膏) adhesive and herb-medicine treatment. Verbal numeric rating scale, medical examination by interview and rib series x-ray were used to assess progress of treatment. And we took pictures of left flank after attaching Daewhangchija-paste to observe the changes of the skin colors. Results: Rib series x-ray taken after 2 months of treatment revealed hard callus which added stability against external force on rib cage. After taking off Daewhangchija-paste, left plank skin turned into blue, green and yellow. And the pain level(VNRS) of left plank decreased from 10 to 0.5 for 4 months. Conclusions: Pain reduction on trauma site and improvement of general health condition were observed during combination treatment of Daewhangchija-paste adhesive and herb-medicine.

• The Journal of Advanced Prosthodontics
• /
• 제4권2호
• /
• pp.97-102
• /
• 2012

Study was conducted to determine and assess the effect of different type of denture adhesives on the incisal bite force of complete denture wearers until the dislodgement of upper denture, using pressure transducer. MATERIALS AND METHODS. 30 patients out of 100 were included in the study. Based on the Kapur's method of scoring denture retention and stability, these patients were divided into 3 groups-Group A - Clinically good dentures; Group B - Clinically fair dentures; and Group C - Clinically poor dentures. A custom made occlusal force meter was constructed based on the load cell type of pressure transducers. Different adhesives (powder, paste and adhesive strips) were used in the study. Complete denture wearers were asked to bite on the load cell and the readings of incisal bite force were recorded. The readings of incisal bite force were subjected to statistical analysis using Repeated measures ANOVA followed by post-hoc bonferroni test. RESULTS. The result suggests that denture adhesives improved the incisal bite force of complete denture wearers significantly The incisal bite force (in kg) in Group A without using adhesives, with powder adhesive, with paste adhesive and with adhesive strips was found to be 2.48 (${\pm}0.16$), 3.43 (${\pm}0.11$), 6.01 (${\pm}0.11$), 3.22 (${\pm}0.09$) respectively. The incisal bite force (in kg) in Group B without using adhesives, with powder adhesive, with paste adhesive and with adhesive strips was found to be 1.87 (${\pm}0.18$), 3.35 (${\pm}0.14$), 5.34 (${\pm}0.18$), 3.21 (${\pm}0.12$) respectively. The incisal bite force (in kg) in Group C without using adhesives, with powder adhesive, with paste adhesive and with adhesive strips was found to be 1.00 (${\pm}0.17$), 3.07 (${\pm}0.14$), 4.37 (${\pm}0.26$), 2.99 (${\pm}0.14$) respectively. CONCLUSION. Within the limitations of the study, it was concluded that the use of denture adhesive was found to be significantly effective in improving the incisal bite force of complete dentures until the dislodgement of upper denture. Fittydent paste adhesive was found to be more effective than the powder and strips adhesives. The improvement in incisal bite force was found to be higher in Group C in comparison to that of Group A and Group B.

• 보존과학회지
• /
• 제12권1호
• /
• pp.83-91
• /
• 2003

회화 문화재의 표장 및 보존처리에 쓰이는 풀은 그 문화재의 수명을 좌우할 정도로 중요하기 때문에 옛날부터 풀의 제조법에 관한 연구가 있어 왔고, 이에 대한 기록이 남겨져 왔다. 기록들을 종합해 보면, 대부분 풀의 제조법에 있어 소맥의 단백질을 제거하는 것에 대한 연구가 행해졌음을 알 수 있다. 이렇게 공통적으로 보여지는 단백질 제거는 단백질이 풀에 있어서 유익하지 못한 요소를 갖고 있다는 것이었다. 실제로 단백질 함유량에 따른 굴의 접착력과 보존성의 변화에 대한 실험을 해 보았는데, 그 결과를 종합해 보면, 미생물의 영양원인 단백질의 함량이 적을수록 접착력과 보존성은 좋아지지만, 유연성은 떨어졌다. 그러나 단백질의 함량이 적으면 적을수록 룰의 보존성은 좋아지기 때문에 회화 문화재 보존처리에 쓰여야 하는 풀은 보존성이 있고, 최소한의 농도로 최대한의 접착력을 지닌 또, 가역성이 있는 소맥 전분풀이었다.

• 한국인쇄학회지
• /
• 제30권2호
• /
• pp.59-68
• /
• 2012

As one of the eletronic device industries has been developed by using a recent printing method, the consumption of Ag paste has been on the rise as well. The printing method has simple processes in comparison with other methods. Also it enables to be large-scaled and to lower price ranges. If UV curing system would be applied to the printing method, energy consumption and dangerousness from curing system can be minimized in a short period of time so that its method can be more eco-friendly. This study conducted an experiment in order to make UV curing Ag paste which is feasible to implement micro patterns with different dispersing agents. The purpose of the study is to analysis the suitable printability for micro pattern and to test dispersibility, hardening properties, conductivity and adhesive stength by measuring viscosity, TI(thixotropy index), G', G", $tan{\delta}$(G"/G') after making paste. We have experimented with four dispersing agents. After We did an analysis of characteristic of rheology, conductivity and adhesive stength, etc, We confirmed that the paste added FP 3060 has excellent dispersibility, conductivity and adhesive stength. If the paste has excellent dispersibility, we will expect that micro pattern is made by that.

• 펄프종이기술
• /
• 제46권4호
• /
• pp.44-53
• /
• 2014

This research were aimed at developing starches which have high preservability and high bonding strength from corn starch, modified cationic and oxidized corn starches, as compared to the fermented wheat starch. On the lining that attaching the base paper on the back of the work with paste, the coating weight was determined by the solid contents of the paste rather than the viscosity of paste. Adhesive strength and stiffness were also determined by the solid contents of the paste. Corn starch had lower solid contents, higher viscosity, and higher adhesive strength than other starches. In the iodine stain to the surface of peeled base paper off, paste deeply penetrated into the traditional Hanji than modern Hanji. And oxidized starch paste deeply penetrated into the paper layer than the cationic starch.

• 한국복합재료학회:학술대회논문집
• /
• 한국복합재료학회 2005년도 추계학술발표대회 논문집
• /
• pp.57-60
• /
• 2005

Composite-to-aluminum joins were tested to get failure loads and modes for three types of joins; adhesive bonding, bolt fastening, and adhesive-bolt hybrid joining. Film type adhesive FM73 and paste type adhesive Cytec EA9394S were used for aluminum and composite bonding to make a double-lap joint. A digital microscope camcorder was used to monitor the failure initiation and propagation. It was found that the hybrid joining is an effective method to strengthen the joint when the mechanical fastening is stronger than the bonding as in the case of using the paste type adhesive. On the contrary, when the strength of the bolted joint is lower than the strength of the bonded joint as in the joint with the film type adhesive, the bolt joining contribute little to the hybrid joint strength.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 2004년도 춘계 학술발표회 제16권1호
• /
• pp.300-303
• /
• 2004

In this study, the mixing contents of ceramic powder and of shrinkage-reducing agent (SRA) influencing on the strength properties of MMA-modified polymer paste were examined. Regardless of SRA content, the flexural. the compressive and the adhesive strengths of the MMA-modified polymer paste tended to increase as the mixing content of ceramic powder increased. On the other hand, those strengths of the polymer paste tended to decrease as the mixing content of SRA increased without regard to the paste content. Furthermore. the adhesive strength of MMA-modified polymer paste in a wet condition decreased about $30-40\%$ of that in an air-dry condition without regard to the mixing content of ceramic powder and SRA.

• 보존과학회지
• /
• 제27권3호
• /
• pp.261-268
• /
• 2011

본 연구는 문헌연구를 바탕으로 하여 전통적인 방법으로 풀을 조제하여 배접하는 경우 첨가제가 풀의 성질 및 접착특성에 미치는 영향을 고찰한 결과이다. 본 연구는 향후 회화문화재의 보존처리용 천연접착제 개발을 위한 기초자료로 제시하고자 한다. 따라서 본 연구에서는 접착제에 첨가제가 미치는 영향을 검토하기 위하여 임원경제지(林園經濟志), 거가필용사류전집(居家必用事類全集), 다능비사(多能鄙事), 죽여산방잡부(竹嶼山房雜部)에서 공통적으로 사용되고 있는 백반과 황랍을, 장황지(裝潢志)와 제민요술(濟民要術)에서 공통적으로 사용되고 있는 석회를 첨가제로 사용하여 그 특성 즉, 점도, pH, 유연성, 박리강도, 항균성, 방미성, 보존성 등을 측정하여 고찰하였다. 그 결과 첨가제 고유의 특성이 풀의 특성에 큰 영향을 미치는 것을 알 수 있었다. 백반은 유연성을 증가시켰으나, 점도, 접착강도, pH는 감소시켰으며, 황랍은 유연성, 점도, 접착강도, pH를 모두 감소시켰으며, 석회는 유연성, 점도, pH, 접착강도를 모두 증가시키는 경향을 나타내었다.

• 마이크로전자및패키징학회지
• /
• 제29권2호
• /
• pp.107-112
• /
• 2022

본 연구에서는 용제를 전혀 사용하지않고 UV경화가 가능한 실버 페이스트를 개발하였다. 무용제(solvent-free) 타입으로 개발한 실버 페이스트의 점도 및 점탄성 측정하였다. 그리고 스크린인쇄로 패턴을 인쇄한 후에 UV경화로 전극도막을 형성시켰다. 형성된 전극도막의 전도성, 연필경도, 접착력에 대해서 평가하였다. 마지막으로 전극도막의 경화특성은 TGA 및 FT-IR로 평가하였다. 이러한 결과를 정리하면 전도성, 접착력, 경화특성에 대해서는 Paste(4), 즉 1.2 ㎛의 구형 실버 파우더와 50 nm 실버 파우더를 72:8%로 혼합한 실버 페이스트가 가장 우수한 물성이 얻어짐을 알 수 있었다.