公开(公告)号：DE2264876A1

公开(公告)日：1975-04-24

申请号：DE2264876

申请日：1972-02-25

Applicant: BASF AG

Inventor： KUERTEN HERIBERT DR ING ,  NAGEL OTTO DR ING ,  SINN RICHARD PROF DR ING ,  WEINLE WERNER ,  ENGLER PETER DR ING

IPC: D01D5/00

Abstract: Extruded plastic filaments (e.g. polyolefine) are passed from an extrusion nozzle into a high energy flow of auxiliary fluid (pref. water) whereby the filaments are split into short fibres (e.g. micro-fibres) by the shearing action of the auxiliary fluid flow. Pref. the filaments are extruded from nozzles surrounding a nozzle for the auxiliary fluid and pref. the nozzles are directed towards a cylindrical splitting chamber in which the high energy flow is produced and the filaments are split. The splitting chamber may be located in a main chamber filled with auxiliary fluid. The high energy flow may have a velocity of 37 m/sec and a pressure of 7 atm. The fibres produced are uniform, and high temp. heating of the auxiliary fluid and the use of solvents are eliminated resulting in a more economic process.

公开(公告)号：DE2252043A1

公开(公告)日：1974-05-09

申请号：DE2252043

申请日：1972-10-24

Applicant: BASF AG

Inventor： NAGEL OTTO DR ING ,  HESS KLAUS DR ING ,  STICKEL RICHARD DIPL ING ,  DAUCHER HANS DR ING

IPC: C02C3/00

Abstract: Difficult sluges such as those from sewage installations, water purification systems, hydroxide and titanium dioxide sludges, etc., which are conditioned and/or dewatered by freezing and thawing on heat exchanging surfaces chilled with a refrigerant and then reheated, are processed by pressing out all that has thawed between the still frozen and the heat-exchanging surfaces and, only when the sludge has fully thawed out, is a condenser of normal type set on to condense the refrigerant. By removal of the heat-insulating thawed-out fluid from the zone between frozen and heat-exchanging surfaces, the condensation temperature of the refrigerant and thus running costs of the refrigeration plant are considerably reduced. By combining conditioning and dewatering in one operation, the economics of the process are improved.

公开(公告)号：DE2208921A1

公开(公告)日：1973-09-06

申请号：DE2208921

申请日：1972-02-25

Applicant: BASF AG

Inventor： KUERTEN HERIBERT DR ING ,  NAGEL OTTO DR ING ,  SINN RICHARD PROF DR ING ,  WEINLE WERNER ,  ENGLER PETER DR ING

IPC: D01D5/11 ,  D01D5/26 ,  D01D5/40 ,  D01F11/04

Abstract: 1413356 Fibrids of thermoplastic materials BADISCHE ANILIN- & SODA-FABRIK AG 23 Feb 1973 [25 Feb 1972] 8938/73 Heading B5B Fibrids (i.e. short fibres) of a thermoplastics material are made by introducing a high-speed propulsive jet and a slower-moving stream of a liquid co-currently into a mixing tube arranged coaxially with the jet, whereby a shear gradient is set up in the mixing tube between the highspeed jet and the slower-moving liquid stream, and feeding the molten thermoplastics material through a die into the region of the shear gradient, whereby the thermoplastics material is broken up into fibres by the action of shear stresses within the region of the shear-gradient. Specified thermoplastics materials include polyethylene, polypropylene and their waxes and extended waxes, polyamides, polyesters, polyvinyl chloride and polystyrene. In Fig. 1, the apparatus is enclosed in container 4. Melt is supplied via 6 to outlet orifice 2; the spinning medium, suitably water, is supplied via 5 to the outlet orifice 1 of the propulsive jet; 3 is the impulse exchange chamber or mixing tube. If the relatively slow-moving stream of liquid entrained from the container is replaced by liquid coming from a pump, the container may be dispensed with, as in Fig. 2, where 7 is the feed-line for the slow-moving medium (water) spinning being effected in tube 3 which acts as impulse exchange chamber.