The downland resin injection unit (for pumping polyester resin into matched moulds)

Composites ◽  
1971 ◽  
Vol 2 (2) ◽  
pp. 127
Keyword(s):  
Polyester Resin ◽  
Resin Injection ◽  
Injection Unit

scholarly journals Study on Structural Design and Analysis of Composite Boat Hull Manufactured by Resin Infusion Simulation

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5918
Author(s):  
Haseung Lee ◽  
Kyungwoo Jung ◽  
Hyunbum Park
Keyword(s):  
Structural Design ◽  
Polyester Resin ◽  
Manufacturing Cost ◽  
Resin Infusion ◽  
Composite Manufacturing ◽  
Manufacturing Method ◽  
Advanced Composite ◽  
Rtm Process ◽  
Resin Injection ◽  
Quality Product

In this paper, structural design and analysis of a composite boat hull was performed. A resin transfer molding manufacturing method was adopted for manufacturing the composite boat hull. The RTM process is an advanced composite manufacturing method that allows a much higher quality product than the hand lay-up process, and less manufacturing cost compared to the autoclave method. Therefore, the RTM manufacturing method was adopted. The mechanical properties of the various aramid fibers and polyester resin were investigated. Based on this, structural design of boat hull was performed using aramid fiber or polyester. After structural design, the optimized resin infusion analysis for RTM manufacturing method was performed. Through the resin infusion analysis, it is confirmed that the designed location of resin injection and outlet is acceptable for manufacturing.

Searching for the causes why some of the paintings by Mihaly Munkacsy are darkening

1990 ◽  
Vol 48 (2) ◽  
pp. 204-205
Author(s):  
Imre Pozsgai ◽  
Klara Erdöhalmi-Torok
Keyword(s):  
Electron Beam ◽  
Cross Section ◽  
Polyester Resin ◽  
National Gallery ◽  
X Ray ◽  
Art Historians ◽  
Made In ◽  
Grinding And Polishing

The paintings by the great Hungarian master Mihaly Munkacsy (1844-1900) made in an 8-9 years period of his activity are deteriorating. The most conspicuous sign of the deterioration is an intensive darkening. We have made an attempt by electron beam microanalysis to clarify the causes of the darkening. The importance of a study like this is increased by the fact that a similar darkening can be observed on the paintings by Munkacsy’s contemporaries e.g Courbet and Makart. A thick brown mass the so called bitumen used by Munkacsy for grounding and also as a paint is believed by the art historians to cause the darkening.For this study, paint specimens were taken from the following paintings: “Studio”, “Farewell” and the “Portrait of the Master’s Wife”, all of them are the property of the Hungarian National Gallery. The paint samples were embedded in a polyester resin “Poly-Pol PS-230” and after grinding and polishing their cross section was used for x-ray mapping.

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