JPS59211663A - Production of metal fiber nonwoven fabric - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Technical field of invention) The present invention relates to a method for manufacturing metal fiber nonwoven fabric.

More specifically, the present invention relates to a method particularly suitable for producing a nonwoven fabric from ultrafine lead fibers having a fiber diameter of 100 μm or less, particularly 50 μm or less.

(Prior art and its problems) When forming a web by collecting spun metal fibers on a collection surface, a wide uniform web is created by using two types of inclined plates that swing in the width direction and the vertical direction. There are known methods to do this.

had a tendency to build up and could not form a smooth uniform web for a long time.

(Objective of the invention) Smooth sliding of metal fibers on an inclined plate at a constant speed
To continuously and stably produce a metal fiber nonwoven fabric having uniform nine-sided density and ensuring properties over a long period of time.

(Structure of the Invention) (1) A method of forming a nonwoven fabric by shaking off bath-melt spun metal fiber yarn from side to side with an inclined plate, characterized in that the inclined plate is constituted by a sliding surface that can be sequentially fed. A method for producing a metal fiber nonwoven fabric.

(2) The method for producing a metal fiber nonwoven fabric according to claim 1, wherein the sliding surface is an antistatic or conductive strip.

(Mechanism of Action of the Invention) The metal fiber of the present invention is a fiber made of a metal or alloy that can be melt-spun.

For example, lead, aluminum, zinc, tin, iron, copper, etc., or alloys of these metals or with other metals, such as &, are suitable, but there is no need to limit the metals to these metals.

The inclined plate of the present invention may be a mechanism having a sliding surface that can be supplied sequentially, and it does not matter whether or not there is a structure to support this sliding surface. Therefore, the inclined plate itself may be composed of a sliding surface. Such a sliding surface is preferably one having a so-called belt-like structure, such as a belt-like material or a film-like material, and one surface of which is adapted to the sliding surface, and usually a smooth surface.

The strip-like material constituting the sliding surface of the present invention has antistatic or conductive properties, for example, an electrical resistivity of 10 to 127 cm or less.

Preferably, the material has a sliding surface of 10 D/=m or less, and is selected from the viewpoint of maintaining the slipperiness of Go fibers.

Such electrical performance can be achieved by constructing the sliding surface with a material containing an antistatic or conductive substance, by treating the surface with an antistatic agent (conductive agent), or by forming a metal film (plating, vapor deposition). etc.) It can be applied by a known method such as a processing method.

In the present invention, what is the sequentially supplyable force sliding surface?

It expresses a state that can be supplied sequentially due to its structure,
Continuous supply is not required. In short, there is lead powder and t on the sliding surface.
*The object of the present invention can be achieved if new sliding surfaces can be supplied at any time before and after fibers start to show a tendency to accumulate. Of course, if there is a problem in terms of labor and cost in detecting the accumulation phenomenon, it is sufficient to constantly supply a new sliding surface intermittently or continuously.

Such a sliding surface can be configured as an end belt-like or an endless belt-like mechanism.

Dimensions. It is preferable to add a mechanism for cleaning the sliding surface with a brush after use.

The present invention will be further explained below using the drawings.

Flag 1 is a preferred embodiment of the present invention. The metal fiber will be explained using lead fiber as a representative example.

As mentioned above, the cause of poor slipperiness is contamination of the sliding surface, so the cleaning roller 3 continuously supplies the sliding surface 2 while scraping off lead powder.

FIG. 2 shows yet another preferred embodiment.

The sheet-like material pulled out from the roll 7 is supplied onto one inclined plate as a sliding surface. This inclined plate 1 may be replaced with a roller and may have a belt conveyor-like structure. 8 is a take-up roller.

The contaminated sheet material is rolled up. This sheet form 4. J-rei can be recycled and reused, and in some cases, it can be thrown away.

"Teflon" (tetrafluoroethylene) is a sheet-like material that is slippery, easily eroded, and difficult to attract dirt.However, in this case, there are no falling lead fibers.Therefore, the material used here has antistatic properties. Alternatively, it is a desirable requirement that it be conductive.Since lead fibers are conductive, static electricity is immediately removed, and it was expected that such a problem would not occur.However, contrary to expectations, lead fibers with a diameter of 50μ or less It has been found that this phenomenon occurs significantly in the case of thin and long lead fibers.This fact was first clarified when ultra-fine lead fibers were spun.

Furthermore, the antistatic or conductive sheet of the present invention is of course applicable not only to the inclined plate but also to the tilting plate (1/) shown in FIG. 1-1 (FIG. 2) and the belt conveyor 5.

FIG. 6 shows a front view of FIG. 1. A constant width is determined by reciprocating the inclined plate 1 from side to side in the width direction of the nonwoven fabric. A sliding surface 2 (sheet-like material) is moving on this inclined plate 1. Furthermore, a side plate 9 is installed in close contact with the sliding surface 2 in order to match the direction in which the fiber bundles slide down to the direction of the inclined plate.

In FIG. 3, arrows indicate the direction of movement.

(Effects of the Invention) Since the sliding surface is sequentially supplied, the lead fibers always slide down the inclined plate at a constant speed and smoothly, and a nonwoven fabric is stably formed.

The present invention will be further explained by giving examples.

EXAMPLE The spun lead fiber yarn was introduced into a collecting device equipped with a double-sided At-deposited film shown in step 1 on which it could be continuously fed on an inclined plate to obtain a non-woven fabric with a width of 9 and 60 cm.

Winding was started after confirming that the film began to steadily move downward. The first non-woven fabric taken from Makimachi, 60
When the uniformity of the nonwoven fabric was compared with that of the rolled nonwoven fabric after several minutes, almost no change was observed, and a uniform nonwoven fabric was continuously obtained.

Next, for comparison, the film was removed from the collection device shown in Fig. 1, and a lead fiber thread was dropped directly onto the fixed inclined plate made of A and 7, and was shaken off to form a 60 cm flat piece. A nonwoven fabric was obtained. Thirty minutes after starting layer winding, the slipperiness was poor and the speed of falling onto the collection surface was uneven. Furthermore, the flying distance from the inclined plate became shorter, and the nonwoven fabric collected after 30 minutes became thinner at both ends and the uniformity was greatly reduced. It should be noted that after 60 minutes, deposition started to occur on the inclined plate. It became impossible to form a nonwoven fabric.

[Brief explanation of the drawing]

1 and 2 are schematic diagrams showing an example of the fiber opening device of the present invention, and FIG. 6 is a front view of FIG. 1. In the figure 1: Inclined plate 1': Ashi plate 2: Sliding surface
3: Cleaning roller 4: Roller 5: Belt conveyor Patent applicant Toshi Co., Ltd. Figure I Contract Figure 3 Procedures Amendment (Method) % formula % 1. Indication of the case 1982 Patent Application No. 81509 2, Title of the invention: Process for manufacturing metal fiber non-woven fabric 3, Relationship with the case of the person making the amendment Patent application Person: 2-2-5 Nihonbashi Muromachi, Chuo-ku, Tokyo Increased due to the amendment Number of inventions None 6. Item 7 of ``Detailed Description of the Invention'' in the specification subject to amendment (1) Contents of the amendment (1) Between lines 10 and 11 of page 1 of the specification [3. Detailed Description of the Invention] Insert "Description".

Claims (2)

[Claims] (1) In a method of forming a nonwoven fabric by shaking off melt-spun metal fiber yarn from side to side with an inclined plate, the inclined plate can be used as a waste that can be continuously supplied. A method for producing a metal fiber nonwoven fabric, characterized in that it is composed of seven sides. (2) The method for producing a metal fiber nonwoven fabric according to claim 1, wherein the sliding surface is an antistatic or conductive strip.