摘要:
The present invention relates to a method for producing a molded body from a blowing-agent containing foam material, which comprises at least one fiber (F), said at least one fiber (F) being partly introduced into the blowing-agent containing foam material. The two ends of the respective fiber (F) which are not surrounded by the foam material thus protrude on one side of the corresponding molded body. The invention further relates to a molded body as such. The invention also relates to a panel which comprises at least one such molded body produced according to the method of the invention, and at least one additional layer (S1). The invention further relates to the production of the panels according to the invention and to the use thereof, for example as rotor blades in wind turbines.
摘要:
The invention relates to a method for producing expanded granulate from a thermoplastic elastomer having a breaking elongation of more than 100% measured according to DIN EN ISO 527-2, comprising the steps: (a) pressing a polymer melt comprising a propellant through a perforated plate (18) which is temperature-controlled to a temperature between 150°C and 280 °C into a granulating chamber (26), (b) reducing the polymer melt pressed through the perforated plate (18) by means of a cutting device (20) into individual, expanding granulate grains, (c) removal of the granulate grains from the granulating chamber (26) by means of a fluid flow (36), wherein the propellant contains CO2 or N2 or a combination of CO2 and N2 and the volume of propellant in the polymer melt comprising propellant lies in the range from 0.5 to 2.0 wt% and wherein a liquid which is temperature-controlled to a temperature between 5°C 20 and 90°C, having a pressure of 0.1 bar to 20 bar above the environmental pressure, flows through the granulating chamber (26), wherein the pressure and temperature of the liquid in the granulating chamber (26) and the temperature of the perforated plate (18) are selected such that the granulate grains in the pressurized liquid are expanded by the contained propellant such that expanded granulate grains having a closed skin result.