Results 231 to 240 of about 22,597 (295)

The Water Vapor Permeability of Polycrystalline Fat Barrier Films

Journal of Agricultural and Food Chemistry, 2006
The water vapor permeability of fat barrier films has been associated with structural characteristics such as polymorphism, crystal size, and chemical composition, among others. However, no mechanistic models have been proposed to describe this relationship.
Martini, Silvana, Kim, D. A., Ollivon, M., Marangoni, A. G.   +3 more
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Water vapor permeability of biodegradable polymers

Journal of environmental polymer degradation, 1997
The water vapor transmission rates (WVTR) of several biodegradable polymers were evaluated to determine their suitability as water-resistant coatings and to understand WVTR better in terms of polymer structure. Values of WVTR at 25‡C ranged from 13 to 2900 g/m2 /day and increased in the order PHBV PLA (cryst.) PLA (amorph.) PCL Bionolle BAK 1095 CAP CA.
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Water Vapor Permeability

1999
Materials which are able to take in or let out moisture either need to be porous or selectively permeable. Membranes are products which are permeable to low molecular weight products or ions. In this work we will discuss mainly microporous or hydrophilic films, coatings and impregnations, i.e. materials permeable to water vapor.
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Water Vapor and Oxygen Permeabilities of Polyetherurethanes

1990
Effects of soft segment content, hydrophilicity of polyether macroglycol soft segment and presence of polydimethylsiloxane co-soft segment on oxygen and water vapor permeabilities of polyetherurethanes were investigated. Polyetherurethanes were synthesized using a bulk synthesis procedure and solution cast as thin films.
Mutlu Karakelle, Robert A. Taller
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Water-Resistant, Water Vapor Permeable Cotton Fabrics1

Textile Research Journal, 1957
The water vapor transmission property of the cotton fiber is used to greatest advantage in plastic-coated, water-resistant fabrics when the coatings are relatively light, and are as much as possible located inside the fabric structure, with cotton exposed on each surface.
Lyman Fourt, Frank Quinn
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Water-vapor permeability of polyvinyl alcohol films

Desalination, 1987
Abstract The water-vapor permeability ( P v ) and the rate of water-vapor transmission ( Q v ) for PVA films were determined at three temperatures (20, 38 and 60°C) and three relative humidities (50, 70 and 90%) by the cup method using a controlled humidity test cabinet.
Yu Xianda, Wang Anlai, Cao Suqin
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Reduction of Water Vapor Permeability in Food Multilayer Biopackaging by Epitaxial Crystallization of Beeswax

Food and Bioprocess Technology, 2021
Florencia Cruces, M. G. García, N. Ochoa   +2 more
semanticscholar   +1 more source

Conversion of Water Vapor Permeable Products

1999
There are processing techniques specific for leather substitutes. In contrast to leather, man-made leather can be processed in a continuous manner. Thermoplastic conditions are often used to form the surface to a grain pattern or gloss in a continuous process [14].
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Water vapor permeability of ultrathin polyurethan films

Journal of Macromolecular Science, Part B, 1969
Abstract Measurements were made on the flux of water through unsupported polyurethan thin films ranging jn thickness from 0.7 to 275 μ (11 mils), using cup cells under the conditions of water in contact on the inside film surface and 45% or 35% relative humidity outside.
Nathaniel S. Schneider, Alfred L. Allen, Louise V. Dusablon   +2 more
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Relation of Water Vapor Permeability of Elastomers to Molecular Structure

Rubber Chemistry and Technology, 1965
Abstract This communication is a quantitative correlation of water vapor permeability of nonpolar elastomers with molecular structure. Permeability of physical blends and of composite layers of elastomers are also discussed. Permeability—Elastomer Structure.—Steric hindrance and unsaturation influence water vapor permeability of elastomers. The
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