Abstract: Polymer compositions and processes consisting of mixture of vinyl chloride polymer and polyether urethane with tertiary amine and/or ammonium groups and heparin. The compositions can be converted into shaped articles, e.g. tubes, cannulae, catheters and the like useful in the medical field.

Abstract: A method of making a plurality of bundles of hollow fibres with potted ends in which a plurality of channels are mounted, one or each side of the periphery of a polygonal wheel, with the open side of each channel facing radially outwardly. A hollow fibre, or a hank of hollow fibres, are fed to the wheel, which is rotated so that the fibres engage in the channels, and build up therein to form a bundle in each channel.Glue is applied by causing the fibre or fibres to engage intermittently on a glueing roller located upstream of the wheel, so that the glue is located at spaced intervals only on the fibre or fibres corresponding to the locations at which potting is required. The fibres are cut adjacent the point where the glue is applied.The channels may form part of the final hollow fibre apparatus, in which case the glue will be allowed to adhere to the channels also.