• Title/Summary/Keyword: glue

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A Study on Warping of Panel Products (목재판상류 변형에 관한 연구)

  • 김수원;강호양
    • Journal of the Korea Furniture Society
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    • v.13 no.1
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    • pp.19-25
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    • 2002
  • Modern furniture is mostly made of panel products such as a glue-up panel, a particle board and a medium density fiberboard(MDF). Warping is a major defect of these panel products resulting in degrading final products. In this study the factors related to the warping of a glue-up panel and MDF were investigated by comparing the physical properties of warped specimens with those of the unwarped. The differences between the moisture contents measured on the both surfaces of specimens were found to mainly influence the warping of glue-up panel specimens whether conditioned or not. The average oven-dry density of warped glue-up panel specimens was definitely higher than that of the unwarped at l% significance level. For MDF the influencing factor on warping has not been revealed yet, however it was found that the conditioning reduced the number of warped specimens.

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THE EXPERIMENTAL STUDY FOR INFLUENCE OF FIBRIN GLUE DURING HEALING PHASE AFTER MAKING ARTIFICIAL BONE DEFECT (백서 두개골 결손부의 골재생에 fibrin glue가 미치는 영향에 관한 실험적 연구)

  • Rim, Jae-Suk;Jang, Hyon-Seok;Eune, Jung-Ju;Lee, Eui-Seok;Park, Eun-Yong;Suh, Je-Duck
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.27 no.5
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    • pp.431-437
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    • 2005
  • Fibrin glue is composed of fibrinogen and thrombin and used in various regions for multiple use. Basic principle is that thrombin converts fibrinogen to fibrin in the presence of $Ca^{2+}$. The structure of fibrin is loose at the beginning, but after about 5 minutes a tight structure is formed under the influence of factor VIII which changes fibrin monomer into fibrin polymer. Fibrin glue is used for tissue adhesive, suture, local hemostasis, wound healing, closure of subdural space. Fibrin adhesive has been used in oral and maxillofacial surgery for hemostasis after tooth extraction in patients with coagulation disorders, skin graft fixation, reattachment of periodontal flaps, in combination with autogenous bone chips to fill the bony cavities following cyst removal, and for securing the hydroxyapatite granules for maxillary alveolar ridge augmentation. This study was designed for researching influence of fibrin glue during healing phase after making artificial bone defect.

Repair of Postinfarct Subacute Left Ventricular Free Wall Rupture Using Fibrin Glue (급성심근경색 후 발생한 아급성형 좌심실파열에서 Fibrin Glue를 이용한 치료)

  • Lee, Jae-Hoon;Noh, Dong-Sub;Kim, Jae-Bum;Park, Nam-Hee;Keum, Dong-Yoon;Choi, Sae-Young
    • Journal of Chest Surgery
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    • v.40 no.6 s.275
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    • pp.448-450
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    • 2007
  • The mortality of left ventricular free wall rupture after acute myocardial infarction is high; however, subactue myocardial rupture can be diagnosed by echocardiogram and the use of the intraaortic balloon pump reduces the incidence of re-rupture. Bleeding from subacute myocardial rupture can be managed by employing fibrin glue and several patches. We report here on a case of successfully managed case of subactue left ventricular free wall rupture after acute myocardial infarction with using the sutureless technique and fibrin glue.

CONDITIONS FOR ALASKA POLLACK AND FILE FISH SKIN GLUE PROCESSING AND THE QUALITY OF PRODUCT (명태피 및 말쥐치피를 이용한 피교의 최적가공조건과 품질에 대하여)

  • LEE Eung-Ho;HA Jin-Whan;HEO Woo-Deock
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.10 no.1
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    • pp.1-9
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    • 1977
  • The purpose of this study is to complish a method of fish glue malting with residual products such as fish head and skin discarded from sea food processing. Using the skins of Alaska pollack and file fish from fillet packers, the optimum conditions of skin glue processing were investigated and physical and chemical properties of the product were also determined. The yields of Alaska pollack, Thelagra calcogramma, skin and file fish, Novodon modestus, skin to the total body weight were $4.6\%\;and\;5.0\%$ respectively. The optimum conditions for a $49.3\%$n yield Alaska pollack skin glue processing were considered the extraction of previously tinted in $0.1\%$ calcium hydroxide solution for 3 hours with the additional water as much as 3 times of sample weight at $70^{\circ}C$ for 3 hours under the controlled pH 5.0. The conditions for file fish skin glue were similar to those of Alaska pollack except the addition of five times of water to the weight of sample skin needed for extraction. The content of crude protein of Alaska pollack and file fish skin glue were $98.0\%\;and\;96.0\%$ respectively. The contents of crude ash and crude lipid were not different from that of chemical grade gelatin. Relative viscosity, melting point, gelation temperature and jelly strength of Alaska pollack skin glue marked 5.84, $21.8^{\circ}C,\;7.1^{\circ}C\;and\;10.0g$ respectively and those of file fish skin glue showed $5.79,\;25.0^{\circ}C,\;7.4^{\circ}C\;and\;11.6g$ respectively.The color and turbidity of Alaska pollack skin glue are slightly superior to those of file fish skin glue. It is supposed that the extract residue of skin glue is valuable for use the animal feeds by the results of amino acid composition. And the ratio of each amino acid content to the total amino acid of Alaska pollack and file fish skin glue is similar to that of chemical grade gelatin.

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A Study on the Yeonpyo-beob for the Explanation of the Manufacturing Method of Traditional Pigments (전통 안료 제법 규명을 위한 연표법 연구)

  • Kang, Yeong Seok;Jeong, Hye Young
    • Journal of Conservation Science
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    • v.35 no.6
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    • pp.664-669
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    • 2019
  • Yeonpyo-beob is a method of manufacturing pigments using bamboo trunk and glue solution. Glue solutions of concentrations 1, 5, and 10% were employed to manufacture pigments, and the characteristics of pigment manufacturing were analyzed according to these concentrations. The pigment manufacturing process can be divided into holding and drying phases. The holding phase involves the sedimentation of relatively large particles, whereas the drying phase involves the sedimentation of small particles. The layers formed during the drying phase have almost similar forms regardless of the concentration of the glue solution. If the concentration of the glue solution is low in the holding phase, the particles are mixed and the formation of a layer is difficult. In contrast, when the concentration of the glue solution is higher, the layer of the pigment is more distinct. These results confirmed that the differences in viscosity due to the variation in the concentration of the glue solution affect the sedimentation velocity of the pigment particles, thereby affecting the formation of the layer of the pigment and the pigment manufacture. Consequently, applying 10% glue solution to reduce the sediment velocity is deemed suitable for the stratification of the pigment particles and the manufacture of pigments.

Improvement on Interfacial, Thermal, and Water Resistance Properties of Wood Sandwich Composites for Stone Bed using CNT-Animal Glue Adhesive (탄소나노튜브/아교 접착제를 이용한 돌침대용 목재 샌드위치 복합재의 계면, 열적 및 방수특성 증가)

  • Kim, Jong-Hyun;Kwon, Dong-Jun;Shin, Pyeong-Su;Baek, Yeong-Min;Park, Ha-Seung;Moon, Sun-Ok;Park, Joung-Man
    • Composites Research
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    • v.30 no.4
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    • pp.235-240
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    • 2017
  • Animal glue, a water-soluble adhesive, has been used historically for high-performance traditional furniture despite the disadvantage of weakness against moisture. Many scientists studied the ways to improve water resistance of animal glue. Improvements on the interfacial, thermal, and water resistance properties of wood sandwich composites (WSC) was studied with carbon nanotube (CNT) wt% in animal glue. Real-time temperature of WSC was measured after WSC was heated with increasing CNT wt%. Lap shear test was performed to determine the interfacial properties of wood and animal glue with CNTs. Water resistance properties of animal glue were determined by lap shear test using specimens dipped in water and the results were compared with the dry case. Hydrophobicity of animal glue by static contact angle was correlated with the variation of lap shear test. Interfacial, thermal, and water resistance properties for animal glue were improved with properly added CNTs.

Electrochemical Study of the Effect of Additives on High Current Density Copper Electroplating (고전류밀도 구리도금에서 첨가제에 따른 전기화학적 특성변화 연구)

  • Shim, Jin-Yong;Moon, Yun-Sung;Lee, Jae-Ho
    • Journal of the Microelectronics and Packaging Society
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    • v.18 no.2
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    • pp.43-48
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    • 2011
  • The maximum current density of copper electrorefining is 350 A/$m^2$ and the higher current density is required to promote the copper productivity. The 1000 A/$m^2$ high current density is possible when rotating disc electrode is employed to reduce diffusion thickness. The copper electroplating with 1000 A/$m^2$ is possible at 400 rpm. Thiourea and glue were used to improve the electrodeposition behaviors during copper electrorefining process. Potentiodynamic polarization tests were conducted to investigate the effects of additives on copper electrodeposition. Galvanostatic tests were also conducted at 1000 A/$m^2$. Copper were electroplated on cylindrical rotating electrodes to give the uniform flow on the electrode surface. The lowest surface roughness was obtained when 16 ppm thiourea was added to the electrolytes. The surface roughness was increased with glue concentration. The surface hardness was not influenced by addition of glue. The copper nuclei were getting smaller with thiourea concentration, however there is no glue effects on copper nucleation.

Research on Re-creational Experiment and Technique of Gold Powder Painting for Goryeo Gold-painted Porcelain (고려시대 금채자기의 채색기법 재현실험 연구)

  • Hwang, Hyun-Sung;Lee, Da-Hae
    • Journal of Conservation Science
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    • v.27 no.4
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    • pp.403-414
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    • 2011
  • This study is re-creational experiment of Goryeo gold-painted decoration based on the research of the gold remaining and gold painting technique on the two pieces of Goryeo gold-painted celadon and the three pieces of Chinese gold-painted porcelain on North Song period which ones have been owned by National Museum of Korea since 2007. For the observation of glue state and color developing ability, four kinds of agglutinative agent and gold powder were mixed over the porcelain sherds, then gradually fired from $100^{\circ}C$ to $1200^{\circ}C$. Visual effect and ideal temperature were measured. Among of them, oil and glue showed the best results in glue state and color developing ability. Through those results, the entire Goryeo engraved celadon were reproduced in modern facilities. Oil and glue were gold-painted over the glaze then it was fired at the ideal temperature 700 to $800^{\circ}C$. For observation the binding condition, the gold-painting cross section was looked by the scanning electron microscope (SEM). As the result, oil and glue did not make much difference in Agglutinative agent, but gold was good, the color developing ability, however, in the case of oil, the edge of gold is curled because of its interfacial tension, and it is not dried well at room temperature so the working property is not as good as the glue. Glue more effective in terms of work efficiency, but color developing ability to fall slightly in this experiment were able to see through.