Abstract:
A formed body with a cavity structure for the sound and/or heat insulation of buildings. The formed body has a cavity structure and has pre-foamed polystyrene particles compressed in a mould or on a conveyor belt system under the influence of pressure and/or heat. The formed body has a communicating cavity volume and the communicating cavity volume has a volume fraction that amounts to 5 to 30 vol. %, preferably 10 to 25 vol. %, particularly 15 to 20 vol. %, referred to the total volume of the formed body, and comprising at least part of the pre-foamed polystyrene particles firmly enclosed in a cured organic or inorganic binder that is used for coating at least part of the polystyrene particles prior to their compression in a mould or on a conveyor belt system.
Abstract:
This invention relates to a process for producing superabsorbent foams comprising the steps of foaming an aqueous mixture comprising at least one monoethylenically unsaturated monomer bearing acid groups, at least one blowing agent, at least one crosslinker and at least one surfactant, polymerizing the foamed mixture and drying the polymerized mixture, to the foams and also to their use for absorbing aqueous fluids.
Abstract:
A method of depositing a conformal coating on a porous non-ceramic substrate requires reactive gases to flow through the substrate so as to leave a conformal coating behind. The process can be used to leave a hydrophilic surface on the interior pores of the substrate, even when the substrate is of a naturally hydrophobic, e.g., olefinic material. The method can be used in a roll-to-roll process, or in a batch process. In some convenient embodiments of the latter case, the batch reactor and the conformally coated substrate or substrates can together go on to be come part of the end product, e.g., a filter body and the filter elements respectively.
Abstract:
The invention provides methods for modifying one or more properties of porous thin films. In such methods, a formulation comprising a reactive species is applied to the porous thin film and allowed to crosslink. In some embodiments, the crosslinked network thus formed imparts increased mechanical strength and wear resistance to the porous thin films.
Abstract:
Disclosed herein is an expandable polystyrene bead having improved adiabaticity and flame-retardance and a method of producing the expandable polystyrene bead. The expandable polystyrene bead comprises 10 to 60 wt % of a flame retardant which is made of one or more selected from among metal or nonmetal oxides, metal or nonmetal hydroxides, silicates, borates and carbonates, having a particle size of 150 μm. Expanded polystyrene foam having improved adiabaticity and flame-retardance can be obtained using the expandable polystyrene bead. A thin flame-retardant thermal insulator including the expanded polystyrene foam can be widely used in various fire-related fields.
Abstract:
The invention concerns a method for production of an absorber for microwaves, consisting of a packing of expanded polystyrene elements (EPS elements), on which a coating of ferrimagnetic particles is applied, and an absorber produced accordingly. According to the method, an enclosure of synthetic polymers formed on the EPS elements and a polymer matrix, in which the ferrimagnetic particles are embedded, is applied. The coated EPS elements are introduced to a mold and a water vapor stream introduced. The EPS elements expand through the vapor pressure of the residual fraction of pentane in the EPS elements and assume their final size and shape.The absorber produced with the method consists of a packing of EPS elements, which are coated with a ferrimagnetic powder within a polymer matrix, and whose outer structure corresponds to a processing mold.
Abstract:
A method for producing an environment protective foamed thermoplastic resin polymer comprises using an extruder with a helical rod to be driven to rotate. The extruder has a feeding section, a melting section, a mixing section and a heating-shaping section formed therein. The method includes a plurality of steps, in which thermoplastic resin is heated, melted in the melting section and moved into the mixing section, and hollow expansion balls are fed into the extruder to be evenly mixed with the melted thermoplastic resin. Then the hollow expansion balls are slightly heated and inflated, and moved into the heating-shaping section, and then the balls are heated at foaming temperature, foamed and inflated. After being injected through a nozzle, the melted thermoplastic resin and the hollow balls become a foamed thermoplastic resin polymer with a preset thickness and shape.
Abstract:
An object of the present invention is to provide a method for producing bioactive composites having imparted thereto bioactivity, to thereby form and grow in vivo or in vitro a coating layer containing a calcium phosphate compound as the major component with a high adhesion strength on the surface of various types of porous substrates such as a porous shaped body comprising an organic polymer. The means for solving the problem is characterized by comprising at least (1) a step of immersing a porous substrate in a solution containing at least calcium ions and hydrogenphosphate ions, thereby distributing the solution to the inside of at least a part of the pores of the substrate, and (2) a step of depositing fine particles containing a calcium phosphate compound as the major component inside the pores into which the solution is introduced.
Abstract:
Disclosed herein is a gasket comprising a core foam; the core foam is electrically insulating having a surface electrical resistivity of greater than or equal to about 1012 ohm-cm; and an electrically conducting foamed layer that comprises carbon nanotubes disposed on the core foam and integral with the core foam; the electrically conducting foamed layer having a surface electrical resistivity of less than or equal to about 109 ohm-cm; the carbon nanotubes being embedded in the electrically conducting foamed layer.
Abstract:
Methods for coating substrates comprising applying a powder to at least a portion of the substrate are disclosed. Following application of the powder layer, the substrate is coated, such as with a base coat and/or clear coat.