Abstract:
The present invention relates to a method for preparing an open pourous polymer material, wherein said method comprises forming of a polymer solution, addition of a porogen to said polymer solution and precipitation with water of polymer from said polymer solution, and said method then comprises removal of solvent and porogen from said polymer material wherein said precipitation is homogenous through that said wateris in form of crystal water and that said crystal water is bonded to said porogen, wherein said porogen is a sugar hydrate. It further relates to an open porous polymer material, a mixture comprising a sugar hydrate and a polymer solution, and a designed material, and uses thereof.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines mehrschichtigen Werkstoffs mit anisotropen Poren. Sie betrifft ferner einen mehrschichtiger Werkstoff, der durch das erfindungsgemäße Verfahren herstellbar ist, sowie die Verwendung eines mehrschichtigen Werkstoffs als chondrale Trägermatrix, Meniskus-Trägermatrix oder Bandscheiben-Trägermatrix.
Abstract:
La presente invención se refiere a un artículo de polímero de tipo PEEK poroso que comprende una estructura de polímero de tipo PEEK porosa y que presenta al menos una distribución de poros trimodal. La invención describe un procedimiento para la producción de dicho artículo de polímero de tipo PEEK poroso que comprende: a) poner en contacto un polímero de tipo PEEK con una composición que comprende al menos un disolvente orgánico, b) calentar a una temperatura a la que se disuelve el polímero de tipo PEEK, c) añadir al menos un agente porógeno, d) enfriar la mezcla obtenida en c) a una temperatura al menos igual o menor que la temperatura a la que precipita el polímero de tipo PEEK, e) conformar dicha mezcla enfriada para dar un artículo conformado, f) retirar el disolvente orgánico y el agente porógeno, y g) recuperar el artículo de polímero de tipo PEEK.
Abstract:
The disclosure is related to compositions having water permeability greater than about 20 g/(hr*m2) that includes one or more elastomers and one or more agents and methods of preparing the same. The compositions are suitable for use in acoustical devices such as earpieces, e.g., in-ear earpieces.
Abstract:
A method of creating a layer of a single use processing substrate includes the steps of extruding a polymeric sheet with a particulate substance dispersed therein, cooling the polymeric sheet with the particulate substance therein, removing the particulate substance from the polymeric sheet to form holes in the polymeric sheet, and attaching the polymeric sheet to an absorbent sheet.
Abstract:
A method of preparing cellular pellets from a prepolymer comprising a blowing agent, the method comprising the steps of: a) extruding the prepolymer through a die, the die maintained at conditions such that the blowing agent remains in the condensed phase in the prepolymer prior to emerging from the die, and b) upon emergence of the prepolymer through the die, substantially simultaneously cooling the prepolymer by contacting the prepolymer with a cooling agent and cutting the prepolymer; the conditions outside the die being maintained such that the blowing agent vaporizes in the prepolymer to form pores.
Abstract:
The present invention relates to ultrahigh molecular weight polyethylene (UHMWPE) articles comprising a porous UHMWPE polymer structure with an at least trimodal pore distribution and to a process for its preparation which comprises using at least a porogen agent as well as a solvent for generating the porosity. The resulting UHMWPE-type polymer article is well suited for medical implants and/or scaffolds among other applications.
Abstract:
The present invention relates to a method for producing a multi-layer material having anisotropic pores. It further relates to a multi-layer material that can be produced by the method according to the invention and to the use of a multi-layer material as a chondral support matrix, meniscus support matrix or intervertebral disk support matrix.
Abstract:
A method of preparing nanothin polymer films having uniform and selectively sized pores utilizing pore forming templates. Lipids and pore forming templates are dissolved into a first solution. The solvent is removed thereby creating a lipid bilayer with pore forming templates dispersed throughout. The bilayer is hydrated and monomers and crosslinkers are added to create a second solution. A nanothin film with pore forming templates is created through polymerization of said second solution. The pore forming templates are dissolved into a third solution by addition of a chemical in which the pore forming template is soluble, but the lipid bilayer is insoluble. This third solution is separated from the mixture leaving a nanothin polymer film with pores of a uniform thickness and surface area. In summary, the guided assembly method presented here suggests a new general strategy for the fabrication of nanothin materials with controlled permeability, which provides improvements over the currently existing technology.