Standard Test Method for Measurement of Diffusivity, Solubility, and Permeability of Organic Vapor Barriers Using a Flame Ionization Detector (Withdrawn 2004)doi:ASTM F1769-971.1本试验方法涵盖薄膜,塑料薄膜,涂布纸和层压板的挥发性有机蒸汽阻隔性能的测量.测量的特定材料特性包括扩散系数,溶解度和渗透系数;...
Building materials with a perm rating of less than 1 are considered resistant to moisture movement through the material. Those make good vapor barriers. Building materials with a perm rating greater than 1 are considered to pass moisture more-easily from warm to cold sides. Those do not make ...
The water vapor permeability (WVP) of film varies depending on the type of food product, with some food types (such as nuts, baked goods, and smoked bacon) requiring a relatively dry environment, while others (such as fruits, vegetables, and meats) requiring protection from dehydration. The ...
In mice and rats, the barriers are thinner, distances are smaller and drug distribution from blood circulation to the eyes is also more significant than in humans (because the systemic drug clearance and volume are much smaller than in humans). Many studies are based on qualitative methods, ...
A 3D tri-phasic numerical model was developed to predict water vapor permeability in composite materials made of polypropylene (PP) as matrix and cellulose particles as fillers, with existence of an interphase around permeable inclusions. About 70 tri-phasic structures composed of ellipsoidal, heterogen...
Edible moisture barriers: how to assess of their potential and limits in food products shelf-life extension? Control of moisture transfer inside composite food products or between food and its environment remains today a major challenge in food preservation. A wid... C Bourlieu,V Guillard,B Vall...
Films from this material are useful as fluid barriers that allow diffusion of moisture vapors. Similar modifications can be made to acrylate and urethane polymers.doi:US20100267299 A1Gary A. AnderleAlexander V. LubninGeorge E. SnowRonald D. Varn...
Melt fabricated plastic articles with improved solvent and vapor barrier properties are of great need in the packaging industry. Various techniques, such as coextrusion, surface treatments, and coatings, are being employed currently towards this objective. Present work has identified a unique polymer ...
1.A method for the manufacture of a coated substrate, having a moisture vapor permeable air and water barrier, of greater than about 0.949 metric Perms, on at least one surface of the substrate, comprising the steps of:1) providing at least one aqueous composition comprising;a) at least one...
Films from long chain cellulose esters (LCCE) with acyl substituents in the size range between C8 and C18 were found to represent effective barriers to water vapor transport while their obstruction to the transfer of oxygen remained low. It was concluded that the hydrophobic nature of LCCEs is ...