摘要:
The invention relates to a method of preparing expanded thermoplastic microspheres from thermally expandable thermoplastic microspheres comprising a polymer shell encapsulating a foaming agent, the method comprising heating the expandable microspheres within a flexible container (2) to effect expansion of said microspheres and withdrawing gas from said flexible container (2). The invention further relates to an expansion device for preparing such expanded thermoplastic microspheres.
摘要:
The present invention relates to multi-layered composite structures and to methods for the preparation thereof. The present multi-layered composite structures are light weight and capable of high load bearing making the present multi-layered composite structures especially suitable to be used as load bearing structures in, for example, automotive. Specifically, the present invention relates to methods comprising the steps of a) providing a mould for said multi-layered composite structure; b) layering said mould with two or more layers forming the outer surface of said multi-layered composite; c) filling said layered mould with a mixture comprised of non- expanded heat-expandable microspheres and closing said mould; and d) subjecting said closed mould to a temperature of 80°C to 140°C during 1 to 230 minutes thereby providing a relative pressure in said closed mould of 0.1 to 20 bar through expansion of said heat-expandable microspheres thereby forming a multi-layered composite structure in said mould with a foam enforced inner core and a multi-layered outer surface; and e) separating the multi-layered composite structure from said mould.
摘要:
Polystyrene-phenolic foam composites and processes for their preparation are provided. The composites have very low density yet retain advantageous mechanical properties. The composites have excellent fire resistance properties and find application in the production of insulation panels.
摘要:
An insulating structure for an appliance includes an outer layer and an inner layer, wherein an insulating cavity is defined therebetween. A plurality of hollow nano-spheres are disposed within the insulating cavity, wherein each of the hollow nano spheres includes a diameter in the range of from approximately (50) nanometers to approximately (1000) nanometers and has a wall that defines the internal space, and wherein the wall of each hollow nano-sphere has a thickness that is in a range of from approximately (0.5) nanometers to approximately (100) nanometers. A fill material is disposed in the insulating cavity and wherein the fill material is disposed in the space defined between the plurality of hollow nano-spheres, and wherein the fill material includes at least one of powdered silica, granulated silica, other silica material, aerogel and insulating gas.
摘要:
Gegenstand der Erfindung ist ein Flüssig- oder Feststoffsilikon in unvulkanisiertem Zustand mit einem Anteil an unter erhöhter Temperatur expandierendem Füllstoff.
摘要:
A method of molding a sole (6) in vulcanized foam rubber for footwear, comprising the phases of preparing a rubber in the form of strip, preformed and/or granules, mixing said rubber inside a loading and mixing chamber (10), preparing a mold (4) for the molding of a footwear sole (6), said mold (4) defining a molding chamber (8) counter-shaped with respect to a footwear sole (6), conveying the mixed material inside said molding chamber (8) and molding the footwear sole (6) inside the molding chamber (8), removing the footwear sole (6) from said mold (4). Advantageously, the rubber comprises a foaming agent able to generate an expansion of the material inside the molding chamber (8) during molding, so as to uniformly fill said molding chamber (8) with the foam rubber; furthermore, the method comprises the phase of vulcanization of the foam material inside the molding chamber (8).
摘要:
Feedstocks for additive manufacturing are provided. The feedstock may include a matrix material, and one or more capsules disposed in the matrix material, wherein the one or more capsules are configured to be removable from a surface portion when the matrix material is solidified to form one or more cavities in the surface portion. Methods of depositing the feedstocks and objects formed from the feedstocks are also provided.
摘要:
Connectors (600) and/or substrates which are made utilizing a low dielectric constant injection moldable polymer or other melt proces sable polymer, such as, but not limited to, thermoplastic material, thermoplastic composite material, thermoset material, thermoset composite material or a combination thereof. The low dielectric constant injection moldable polymer or other melt processable polymer supports noise and/or crosstalk reductions for high speed signal transmission. The low dielectric constant material provides dielectric shielding between adjacent high speed signal lines (602). The reduced dielectric constant and reduced loss-tangent is created by forming voids or pores (10) within the bulk plastic material, thus increasing the air, gas or void content, and thus decreasing the density and overall dielectric constant of such material. The porosity thus introduced into the shielding between adjacent transmission lines reduces crosstalk and other losses, and thus maintains signal integrity in connector/substrate designs.
摘要:
Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Herstellung eines Rohres, insbesondere eines Kabelführungsrohres, aus einem thermoplastischem Kunststoff. Dabei wird das Rohr mit einem wenigstens dreischichtigen materialeinheitlichen Aufbau aus einer Rohrinnenwand (4), einer geschäumten Zwischenschicht (7) und einer Rohraußenwand (5) ausgerüstet. Erfindungsgemäß wird die Zwischenschicht (7) durch die kombinierte Wirkung zumindest eines chemischen Treibmittels und eines physikalischen Treibmittels aufgeschäumt.