Abstract: The invention relates to a sports ball comprising a rubber core and optionally a felt, the rubber core defining an internal volume and an outer surface, the felt being provided on the outer surface of the rubber core, and the rubber core comprising: natural and/or synthetic rubber; and a biodegradability-enabling additive comprising at least one organic compound in a carrier material, wherein the organic compound is a nutrient substrate for an active landfill or marine environment strain of bacteria. The invention further relates to a method for manufacturing a tennis ball including: a) mixing natural rubber and butadiene rubber with further ingredients and the biodegradability-enabling additive; b) extruding a portion of the mixture; c) utilizing the extruded portion for forming a shellpart; d) assembling a core by attaching at least two shellparts to each other; e) inflating the core; and f) providing a felt on the surface of the core.

Abstract: A ball game racket frame includes a head portion, a grip portion and a shaft portion which connects the grip portion and the head portion. The ball game racket frame is at least partially made of at least one layer of a plurality of fibers which are randomly orientated and intertwined within the layer. According to further aspects, a ball game racket includes the ball game racket frame according to any of the embodiments described herein and a string bed plane comprising a plurality of strings which are attached to at least a portion of the head portion of the ball game racket frame. The string bed plane provides at least one striking surface for striking a game ball. According to yet further aspects, a method for manufacturing a ball game racket frame is disclosed.

Abstract: The present invention relates to a method for characterizing a racket head of a ball game racket frame as well as to the representation of a racket head.

Abstract: The present invention relates to a ball game racket frame with a head portion and a handle portion, wherein the ball game racket frame comprises a fiber composite with at least one multi-fiber roving that is at least partially twisted.

Abstract: The present invention relates to a ball can which can be particularly well recycled.

Abstract: The present invention relates to a ball game racket frame with improved torsional behavior.

Abstract: The invention relates to a ball game racket frame (12) including a head portion (14), a shaft portion (18) and a grip portion (20). The ball game racket frame (12) comprises a fiber composite material having fibers embedded in a matrix. At least 5% of the fibers are natural fibers in at least one cross-section (28, 28a, 28b, 28c, 28d, 28e) of a portion of the ball game racket frame (12). The invention further relates to a ball game racket frame (12) in which the proportion of natural fibers in at least one cross-section (28b, 28c, 28d, 28e) of the shaft portion (18) and/or the grip portion (20), respectively, is greater than the proportion of natural fibers in at least one cross-section (28, 28a) of the head portion (14). The invention further relates to a method for manufacturing such ball game racket frames (12).

Abstract: The present invention relates to a method for characterizing a string pattern of a ball game racket frame as well as to the representation of a string pattern image of a strung ball game racket frame.

Abstract: The present invention relates to a method for characterizing a string pattern of a ball game racket frame as well as to the representation of a string pattern image of a strung ball game racket frame.

Abstract: The present invention relates to a method for characterizing a racket head of a ball game racket frame as well as to the representation of a racket head.

Abstract: The present invention relates to a method for characterizing the deformation properties of a string pattern of a ball game racket frame as well as to the representation of a string pattern image of a strung ball game racket frame.

Abstract: The present invention relates to a ball game racket frame with a head portion and a handle portion, wherein the ball game racket frame comprises a fiber composite with at least one multi-fiber roving that is at least partially twisted.

Abstract: The present invention relates to a grommet and a grommet strip for a ball game racket as well as to a specific ball game racket for receiving the grommet according to the invention or the grommet strip according to the invention.