Imaging materials. Colour images. Determination of water resistance of printed colour images

2016 ◽  
Keyword(s):  
2017 ◽  
Vol 731 ◽  
pp. 55-59
Author(s):  
Martin Černohorský ◽  
Michal Havrlík

This work deals with the determination of basic waterproofing properties of nanofiber textiles with basis weights of up to 30 g/m2. Samples used in this experiment were made from nanofiber textiles based on two polymers – PVDF and PUR. Each polymer was prepared in three basis weights. All samples were not treated prior to testing. One of the key properties was the contact angle of water and the resistance to penetration of liquid water. Water-resistance of nanofiber textiles was tested according to the harmonized European standard EN 13859-1., Underlays for discontinuous roofing in pitched roof constructions are tested according to this standard. In the position of underlays there has to be some layer with low diffusion resistance of water vapor and relatively high waterproofing. We suppose such properties of nanofiber textiles. Testing of the two groups of material basis shows correlation between the contact angle and water-resistance of the nanofiber textile.


1920 ◽  
Vol 12 (1) ◽  
pp. 26-30
Author(s):  
F. P. Veitch ◽  
T. D. Jarrell
Keyword(s):  

2021 ◽  
Vol 4 (398) ◽  
pp. 43-52
Author(s):  
Kirill Sazonov ◽  
◽  
Grigory Kanevsky ◽  
Mikhail Lobachev ◽  
◽  
...  

Object and purpose of research. The object under study is a method to determine ice resistance using towing tests of ship models. The purpose of the work is to develop a method that takes into account the water resistance effect on predictions of full-scale ship ice resistance. Materials and methods. The materials for development are model test data and earlier methods for determination of ice resistance on models, as well as recommendations of the International Towing Tank Conference (ITTC). Main results. The method is suggested to take into account the water resistance in analyzing the towing test data obtained in the ice basin, as well as the method for extrapolating the ice resistance due to hydrodynamic interaction of ice floes with underwater hull, including the scale effect. Conclusions. The methods that take into account the water resistance effect on predictions of ship ice resistance based on towing test data obtained in ice basins are reviewed and analyzed. An improved method to include the water resistance effect in a more correct way is suggested. For better comparison of test results in ice basin it is required to introduce a common method of including the water resistance effect using the method suggested in this work.


Author(s):  
Artem Іefimenko

Pre-treatment viznachaє infusion of mineral additives on the natural deformation of gypsum virob. The main reason for the low water resistance of the gypsum viruses is stated. The reason is є a wedge vise. Such a grip breaks out local contacts with crystals. Tsi cause one to dress up in a negative synergistic effect. A wide circle of naukovts is looked around. Fakhivtsi detect the inflow of mineral and chemical additives on the water resistance of the gypsum. Zokrem is honored that the power of materials on the basis of inorganic viscous accumulation of the manifestation of electrostatic interconnection of subordinate electric spheres of structural elements. Before it was confirmed, the value of the biological deformation of the gypsum should be deposited instead of a mineral supplement. Uwagu zoseredzheno on slag blast-furnace granulated chalk.The meta of the statistic was the determination of the degree of determination of the indicator of the uniform lineal deformation of the water saturation (swelling) ew at m / m. Such an indicator can be used with a supplementary indicator of water resistance. In the experimental preliminaries, we used G-10 grade G-10 industrial gypsum, Zaporizhstal blast-furnace granulation slag, and a plasticizing additive - sodium lignosulfonate in a 2% mixture of gipsuFor further development, the skin with three eyes was placed vertically near the vessel. A steel overlay was placed on top of the zrazok. Before the overlay, an indicator of the year-old type was set, fastened to a laboratory stand. The distance was fixed to the cob to show the indicator. The deformation took 3–5 years to develop. In the meantime, having reached the maximum value and mayzhe, the odra was repaired to decrease. At the same time, there will be a projection of the addition of a supplementary indicator of water resistance to the water consumDue to the increase in the amount of slag, the deformation will decrease. The price decrease did not demonstrate a linear character. The character is sickly. This deposit is analogous to that of the deposits of the mines and water from the slag. Minimal deformation is more favorable for a piece gypsum stone with a removable slag W / (H + W) 0.05–0.1 and ponad 0.27. Tse pіdtverzhu podpuschennya about injections at low water resistance gіpsu ozklinuvalnogo inlet water. The wedge-shaped inflow of water is drawn through the contacts between the crystals and particles in the structures of the hypers. The values of the natural deformations of a piece gypsum stone are projected according to the parameters of the water resistance.


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