Device and method for melt spinning fine non-woven fibers
A non-woven fiber, melt spinning technology, applied in the direction of melt spinning, weaving, fiber processing, etc., can solve the problems of mutual adhesion and discontinuity of non-woven fabrics, and achieve the effect of improving impact and low consumption
Inactive Publication Date: 2007-10-31
SAURER GMBH & CO KG
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Problems solved by technology
[0006] In all state-of-the-art meltblown processes there is a danger that the individual fibers will stick to each other before final curing and cause undesirable discontinuities in the nonwoven
Method used
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Embodiment Construction
[0048] Figure 1 is a diagram schematically showing a first embodiment of the apparatus of the invention for carrying out the method of the invention.
[0049] This exemplary embodiment has a spinneret 1 which is connected via a melt supply line 2 to a melt source (not shown here). Typically an extruder is used as the source of the melt. The extruder melts the thermoplastic material and delivers the material as a polymer melt under pressure to a spinneret. The bottom of the spinneret 1 has a plurality of spinneret holes 5 which are connected to the melt supply pipe 2 inside the spinneret 1 . The spinneret holes 5 are formed in a specific arrangement at the bottom of the spinneret 1 , preferably in a series of one or more interconnected groups. The fiber strands are extruded from the polymer melt emerging from the individual orifices 5 .
[0050] Below the spinneret 1 there is arranged a blowing device 3 which has two oppositely situated blowing nozzles 4.1 and 4.2 at a short...
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Abstract
To provide a drainage collecting pipe which makes clear the relationship between the relative positional relationship between a drift board and a swirl vane, and the draining ability thereof, and exhibits an optimal positional relationship between the drift board and the swirl vane. The drainage collecting pipe is formed of a body 1 having vertical joint ports 3, 4 at upper and lower ends thereof, and horizontal joint ports 6 on the circumferential wall thereof, and the drift board 7 and the swirl vane 8 arranged in the body such that the former is arranged above the latter. Provided that the center of the drift board 7 and the center of the swirl vane 8 are set at a minimally arranged angle when they intersect each other at an angle of 90[deg.] in a plan view from above the center of a vertical pipe axis, the drift board 7 and the swirl vane 8 are arranged in an angular range of 0 to (5 / 16)*[pi] as an allowable angle [theta] in addition to the minimally arranged angle.
Description
technical field [0001] The invention relates to a meltblowing process for melt spinning fine nonwoven fibers as defined in the preamble of claim 1 and to a device for carrying out said method as defined in the preamble of claim 14 . Background technique [0002] When producing non-woven microfibers, a large number of fiber strips are extruded from the polymer melt through the spinneret holes of the spinneret, and then stretched by blown air to form microfibers (ultrafine fibers, Feinstfaser), the average fiber of this fiber Usually <10 μm in diameter. This method is known in the prior art as a meltblown method. The blowing air flow is preferably produced by hot air which is blown onto the fiber strand with high energy. The blown air stream causes stretching and breaking of the fiber strands, thereby forming fine nonwoven fibers of finite length. [0003] DE 33 41 590 A1 discloses a method in which an unheated fluid is used as blowing gas flow. In principle, this coole...
Claims
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IPC IPC(8): D01D5/098D01D4/02
CPCD01D4/025D01D5/0985Y10T442/60
InventorM·格罗纳H·拉威
OwnerSAURER GMBH & CO KG