JPH0647780B2 - Nonwoven web manufacturing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a nonwoven web manufacturing apparatus. More specifically, the present invention relates to a nonwoven web manufacturing apparatus capable of manufacturing a uniform nonwoven web having a mechanism for controlling fiber arrangement.

(Prior Art) Many proposals have hitherto been made regarding a method for producing a web from a continuous filament group. For example, Japanese Examined Patent Publication No. 42-23998 discloses a method of obtaining a non-woven web by utilizing static electricity or air flow. However, in this method, the web that is dispersed and deposited on the net conveyor is greatly affected by external factors such as the number of filaments, the single yarn thickness, and the suction state on the net conveyor surface. It is difficult to control and obtain a web having a uniform basis weight in the width direction. Furthermore, the direction of the arrangement of the fibers in the web to be deposited (hereinafter simply referred to as the arrangement of the fibers) is largely left to the discretion.
It is extremely difficult to control the arrangement of fibers in the web by this method.

On the other hand, Japanese Examined Patent Publication No. 45-19427 discloses a method for producing a non-woven web composed of fibers arranged in a specific direction by swinging filaments by a fluid oscillation method and depositing them on a net conveyor. ing. However, even in this method, the arrangement of fibers in the same device is limited, and the directionality of the nonwoven fabric due to the arrangement of fibers has a degree of freedom with respect to changes in manufacturing conditions such as the number of filaments, single yarn denier, and basis weight. It is practically difficult to control the arrangement of the fibers of the non-woven fabric according to various various conditions. That is, even if a method of changing the oscillating period or the oscillating width of the filament group in order to change the fiber arrangement in the non-woven web, it occurs within the range of the practical period or width that does not affect the dispersion state. Since the fiber arrangement changes only slightly, it cannot cope with various changes in manufacturing conditions. For example, it is difficult to cope with a change in the net speed of several meters to several tens of meters, and even 100 meters or more in some cases, even under a normal condition change such as changing the net conveyor speed in order to change the basis weight.

From such a viewpoint, the present inventors obtain an apparatus for reliably producing a non-woven web having a desired arbitrary width and a controlled fiber arrangement according to various production condition changes by a simple method. Therefore, as a result of intensive studies, the present invention has been completed.

(Object of the invention) The present invention can change the fiber arrangement in a web independently of other production conditions in producing a web, and the obtained web has a uniform basis weight and further has an arbitrary width. An object of the present invention is to provide an apparatus for producing a non-woven web capable of producing a woven web.

(Structure of the Invention) An object of the present invention is to provide a non-woven web manufacturing apparatus in which a filament delivery device is a channel having an elongated outlet shape, and the filament is deposited on a net conveyor by rocking the channel. (a) "A swing shaft that is connected to a drive device and performs a reciprocating linear motion in a certain direction",
(b) "The swing channel suspended by a rotatable fulcrum so that the pendulum movement can be performed in any direction set with respect to the net conveyor traveling direction" and (c) "The net traveling direction. On the other hand, it has a part that can be mounted on the swing shaft at any angle so that the swing direction of the channel can be changed arbitrarily. A vertical slide mechanism and a horizontal rotary slide are provided on either the swing shaft side or the swing channel side. And a connecting member having a mechanism.

(Specific Description of Configuration) The nonwoven web manufacturing apparatus of the present invention basically comprises three members.

The first member is an oscillating shaft that performs a reciprocating linear motion in a certain direction, and is composed of one or a plurality of shafts connected to a conventionally known crank mechanism or the same tubular cam mechanism. There is.

The second member is an oscillating channel for oscillating the filament, and this channel has a suspension fulcrum for performing a pendulum motion in the upper part, and thus also a fulcrum for performing a pendulum motion in the lower part. Have The filaments can be delivered from the rocking channel itself,
It is also possible to deliver from a delivery channel that is provided so as to perform the same oscillating motion as the oscillating channel via the connecting mechanism to the oscillating channel that does not pass the filament group.
In this case, there is a mechanistic advantage that the swing motion of a plurality of delivery channels can be achieved by one swing channel, that is, one swing mechanism. In addition, the channel for delivering the filament group preferably has an elongated slit-shaped outlet, and the direction of the freely rotatable suspension fulcrum can be arbitrarily set with respect to the traveling direction of the net conveyor. It is possible to swing it to.

The shape of this channel is not particularly limited, and it may be a channel having the same cross-sectional shape from top to bottom, or a channel having a different cross-sectional shape at the outlet and the inlet, for example, a skirt-shaped channel. The channel may be a channel provided with a collision plate, but a skirt-shaped channel is preferably used.

The material of the channel is not particularly limited as long as the members necessary for the present invention can be attached, and may be a conductive material such as metal ceramic or a non-conductive material such as plastic.

The third member is a member that connects the rocking channel and the rocking shaft, and has a portion that can be attached to the rocking shaft at an angle so that it can be vertically attached to either the rocking shaft side or the channel side. It is necessary to have a slide mechanism and a horizontal rotation slide mechanism.

That is, it is characterized by having two mechanisms, a horizontal rotary slide and a vertical slide, for converting a reciprocating linear motion of the swing shaft in a certain direction into a motion in an arbitrary direction and converting it into a pendulum motion of a channel. It is a device.

When installing the horizontal rotary slide mechanism and the vertical slide mechanism, various combinations are conceivable and are not particularly limited. That is, a method of installing both mechanisms on the rocking shaft side, a method of installing both mechanisms on the channel side, a method of installing a horizontal rotary slide on the rocking axis side, a method of installing a vertical slide mechanism on the channel side, or vice versa. Any conceivable combinations such as the method of doing are included.

The filament supplied to the apparatus of the present invention may be, for example, organic fiber such as polyester, polyamide, or polyolefin, or inorganic fiber such as glass, which is continuously drawn after spinning using a generally known air sucker. Alternatively, the pre-wound product may be rewound and supplied, or it may be in a bundle or in a tape. It is also preferable to use a method of improving the openability of the filaments by charging the filaments by means such as corona discharge before the entrance of the air sucker, during the air sucker, or after the exit of the air sucker.

The "uniform nonwoven web" referred to in the present invention means a weight of 5 to 5
At 00 g / m ² , it means that the variation of the basis weight every 5 cm in the width direction is within 10% of the average basis weight.

There is no limitation on the advancing speed of the filament group used in the present invention, and a range of 1000 to 8000 m / min is usually used.

Such a filament group is supplied to the device of the present invention,
By using the device of the present invention, the arrangement of fibers can be controlled so that the oscillating direction of the filament can be easily changed without changing the feeding position of the filament group to the device while the driving device is set at the fixed position. This usefulness is immeasurable.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings showing an embodiment of an apparatus for producing a nonwoven web according to the present invention.

FIG. 1 is a schematic view for explaining the action of the device according to the present invention on a filament group, and each of FIGS. 2 to 7 is a main part of the present invention. 1 shows an example of a preferred embodiment of the moving mechanism, and the shape of the rocking channel is shown as a square in FIGS. 2 and 3 for easy description. However, it is clear that the invention is not limited to the embodiments shown in these figures.

The apparatus shown in FIG. 1 has the swing mechanism shown in FIG.

1 is a filament group, which is an air sucker immediately after spinning 2
After being drawn and drawn by, or after being drawn by an air sucker that has been sent out at a constant speed by a roll group (not shown), the yarn is guided to the corona discharge unit 3 and electrostatically charged. The charged filament group is passed through the swing channel 4 and dropped from the swing channel 4 onto the net conveyor 40 that moves in a fixed direction. Rocking channel 4
Is an oscillating shaft 6 which is connected to a driving device (not shown) and performs a reciprocating linear motion in a certain direction (indicated by an arrow A in FIG. 1).
Set metal fittings 7, bending member 8, bearing box 9,
The net conveyor 40 of the rocking channel 4 is adjusted by adjusting the fixed position of one or both of the set fittings 7 connected through the slide shaft 10 and the connecting shaft 11 and fitted to the pair of rocking shafts 6. The set angle α with respect to the traveling direction (arrow G in FIG. 1) is adjustable. Since the swing channel 4 is installed so that the direction of its freely rotatable suspension fulcrum 5 is aligned with the set angle α, the swing channel moves in a direction perpendicular to the set angle α (pending arrow E in FIG. 1). As a result, the filament group is deposited on the moving net conveyor 40 while reciprocating in the direction indicated by the arrow F in FIG. 1 to form a uniform web having a controlled fiber arrangement. It will be.

The arbitrary setting angle α of the connecting member portion 8 mounted on the swing shaft 6 and the suspension fulcrum 5 of the swing channel 4 with respect to the net advancing direction only swings and adjusts the fixed position of the set metal fitting 7 with respect to the swing shaft 6. Can be set to any angle from 0 ° to nearly 90 °.

FIG. 2 shows an example in which a horizontal rotary slide mechanism and a vertical slide mechanism are installed on a swing shaft 6 side and a vertical slide mechanism is installed on a channel side when a horizontal rotary slide mechanism and a vertical slide mechanism are installed in a connecting member in a fiber device. Is shown. Note that FIG. 2 is a front view showing the swing mechanism in which the swing channel is schematically shown in a square shape when viewed in the direction of arrow II-II in FIG.

In FIG. 2, a channel 4 is connected to a screw hole provided at the upper end of the channel, and a shaft 12 rotatably attached to a bearing 18 fixed to a channel support bar 17 is used as a pendulum 5 as a suspension fulcrum 5 in FIG. Exercise is possible.

Below the shaft 12 of the channel 4, there is provided a vertical slide mechanism which is a part of a connecting member, and the vertical slide mechanism is preferably a slide shaft mounted parallel to the center line XX 'axis of the channel 4. It consists of a bearing 13 which moves up and down along 10. The slide shaft 10 is attached to the channel 4 by a bolt 15 via a bracket. A horizontal rotary slide portion, which is a part of the connecting member, is provided on the swing shaft 6 side, is swingably fitted to the swing shaft 6, and is positioned by a conventional fixture (not shown) such as a screw bolt. On the set metal fitting 7 which is attached so as to be adjustable, a bearinging member capable of horizontally rotating slide, preferably, a bending member 8 having an oilless metal 14 is set in the same direction as the suspension fulcrum direction of the set swing channel. , And fixed with the set bolt 16. These two mechanical parts pass through the oilless metal 14 of the bending member 8 and the end of the connecting shaft 11 is a part of the connecting member fixed to the bearing box 9.
Connected by.

That is, in this rocking mechanism example, the reciprocating linear motion of the rocking shaft 6 in the fixed direction (the direction of arrow A) is performed by the connecting shaft 11 without the oilless member in the bending member 8 mounted on the rocking shaft 6. Horizontal rotation slide in metal (rotation in the direction of arrow D and arrow B
(While sliding in the direction of arrow C), the bearing 13 in the bearing box 9 connected to the end of the connecting shaft 11 is moved up and down along the slide shaft 10 (in the direction of arrow C) to move the channel 4. It is possible to change the pendulum motion in a direction perpendicular to the setting direction of the suspension shaft 12.

FIG. 3 shows an example in which, in the apparatus of the present invention, both the horizontal rotary slide mechanism and the vertical slide mechanism of the connecting member are installed on the swing shaft side. FIG. 4 is a plan view of the connecting member as viewed in the direction of line IV-IV in FIG.

The channel 4 is capable of pendulum movement with the shaft 12 as a fulcrum, as in FIG.

The swing shaft 6 side has both a horizontal rotary slide part and a vertical slide part that are part of the connecting member. A horizontally rotatable slideable bearing, preferably an oilless metal 20 and a vertical slide bearing 23, is a common bearing box 2.
1, the two are arranged so that they are at right angles. This common bearing box 21 is used for the slide bearing 2 inside.
3 vertically moves with the slide shaft 22 on the set metal fitting 7 attached to the swing shaft 6, and slides so that the horizontal sliding direction of the oilless bearing is the same as the suspension fulcrum direction of the set swing channel. The shaft 22 is fixed to the set fitting 7 with the set bolt 16. The mechanical parts of the connecting members on these swing shafts pass through the oilless metal and the ends of the bracket 19 are provided at the lower part of the channel.
It is connected to the channel 4 by a connecting shaft 11 which is a part of a connecting member fixed to the.

That is, in this rocking mechanism example, the connecting shaft 11 whose end portion is fixed to the bracket 19 provided at the lower portion of the channel for reciprocating linear motion of the rocking shaft in a certain direction is an oilless metal mounted on the rocking shaft. While performing a horizontal rotary motion in 20, the channel 4 of the suspension shaft 12 is moved up and down in accordance with the vertical movement of the slide bearing 23 having the bearing box 21 common to the oilless metal 20 along the slide shaft 22. It can be changed to a pendulum movement in a direction perpendicular to the set direction.

FIG. 5 shows that, in the apparatus of the present invention, both the horizontal rotating slide mechanism and the vertical slide mechanism of the connecting member are installed on the channel side, and further, both are arranged so as to be suitable for the chain type multi-spindle swing shown in FIG. An example in which the mechanism is installed inside the channel is shown.

FIG. 5 is a front view from the same direction as the example of FIG.
The drawing is a side view of the connecting member of FIG. 5 taken along line VI-VI.

The channel 4 is capable of pendulum motion with the shaft 12 as a fulcrum, as in FIG. Inside the channel 4, a vertical slide bearing 26 is horizontally rotatable and slidable, and is preferably arranged in a common bearing box at a right angle to the oilless metal 24.
Up and down slide can be performed along 7.

On the metal fitting 7 attached to the rocking shaft 6, a bending member 28, which is installed in the same direction as the suspension fulcrum direction of the rocking channel set, is fixed by a set bolt 16, and a horizontal rotary slide mechanism oilless metal is provided. Fix the end of the connecting shaft that passes through the inside of. That is, in this swing mechanism, the connecting shaft 11 slides horizontally in the oil-less metal inside the channel in a reciprocating linear motion of the swing shaft 6 in a certain direction, and vertically slides along the slide shaft 27 of the bearing 26. By vertically moving by, the channel 4 can be changed to a pendulum movement in a direction perpendicular to the setting direction of the suspension fulcrum 12. This swing example is particularly useful in the case of the chain system shown in FIG.

FIG. 7 is a chain system in which the swinging device of the present invention shown in FIGS. 5 and 6 is swung as a main channel, and another channel 33 connected by a connecting rod 32 performs exactly the same movement as the main channel. It is a schematic diagram explaining. The connected channel 33 has a suspension fulcrum of the same structure as the main channel 4, and is suspended in the same setting direction of the suspension fulcrum. Each channel is connected by a connecting rod 32 via a shaft 29 and a bearing 30 attached to the lower part of the channel, and the same movement as the pendulum movement of the main channel can be performed.

Therefore, a plurality of filament group delivery channels 33
Has the advantage that it can be swung by one swing main channel.

The device of the present invention is not limited to the examples shown in FIGS. 1 to 7 and can be similarly considered for other variations similar thereto.

By using the device of the present invention, the channel performs a pendulum motion with very little microvibration even in a high cycle, so that the filament group ejected from the channel outlet is in the channel or between the channel outlet and the net conveyor collecting surface. Thus, it is possible to obtain a uniform web with extremely good single-fiber openability without causing entanglement of the single yarn.

Also, the distance between the oscillating filament delivery channel and the net conveyor is determined by the forward speed of the filament and associated air ejected from the outlet of the channel, and this distance can be easily selected empirically.

In the device of the present invention, the web width of 3 m is obtained by changing the amplitude of the driving device main body and / or the distance between the channel fulcrum 5 shown in FIG. 1 and the connecting shaft 11 which is a part of the connecting member.
Any web width up to a degree can be obtained. Further, web rows can be sequentially laminated in the width direction of the net conveyor by a multi-weight stacking method in which a large number of devices of the present invention are arranged, and a uniform wide web having no stripes in the width direction can be easily obtained.

(Examples) Hereinafter, the present invention will be specifically described with reference to Examples, and the performance of the nonwoven fabric obtained by using the apparatus of the present invention will be shown.

Example 1 Polyethylene terephthalate (ηSP / c-0.78 in orthogachlorophenol) has a diameter of 0.4 mm and a number of holes of 68.
The unstretched filaments obtained by melt spinning at 300 ° C. using the spinneret of FIG. 1 were placed 90 cm below the spinneret. The round air sucker and corona discharge unit shown in FIG. A non-woven web was produced by threading into a unit consisting of the equipment. The swing device of the present invention includes a second
A device similar to the device illustrated in the figure and the device illustrated in FIG. 3 was used.

High pressure air with a pressure of 5 kg / cm ² G was supplied to the round air sucker. The single yarn fineness of the filament group obtained under these conditions was 6 denier, and the forward speed of the filament group calculated from the single yarn fineness was 5100 m / min. Corona discharge is performed at a position about 15 mm below the air soccer. This corona discharge was performed by applying a negative DC high voltage of about 30 kV to the electrode needles arranged in a vertical row with a 2.5 mm pitch and 10 needles. The channel of each rocking device had a height of 200 mm, a channel outlet shape of 6 mm in width, and a length of 200 mm.
The setting direction of the suspension fulcrum of this channel with respect to the net traveling direction is such that the angle α shown in FIG. 1 is 50 °, 40 °, 2 °.
It was changed to be 0 degree. The connecting member was set in correspondence with this angle.

The swing shaft installed at right angles to the traveling direction of the net conveyor 40 has an amplitude of 30 mm and a swing cycle of 300 C / min.
The reciprocating linear motion was performed in a certain direction.

The distance between the swinging point of the channel (connection point of the connecting shaft with the channel) and the channel suspension fulcrum is set to 90 mm, the distance between the channel outlet and the net conveyor is set to 600 mm,
When the channel is pendulum-moved by the mechanism described with reference to FIGS. 2 and 3, the filament group is assisted by the suction duct provided at the bottom of the net conveyor, and the filament group has a uniform width of about 50 cm on the net conveyor 40. A woven web was formed.

The net conveyor moving speed was 15 m / min.

A partially thermocompression-bonded roll (temperature 20
Hot pressing was performed at 0 ° C.), then impregnated with a polyvinyl alcohol resin, and cured at 140 ° C. for 2 minutes to obtain a nonwoven fabric.

Table 1 shows the uniformity of the basis weight of the non-woven fabric and the length / width direction of the non-woven fabric when the angle α of the fulcrum direction of the channel was changed for each of the two exemplified devices of the present invention.

It was proved from Table 1 that the strong vertical / horizontal orientation of the nonwoven fabric can be freely changed by changing α (degree). In addition, it was proved that the non-woven fabric having uniformity was obtained by the apparatus of the present invention in which the variation in unit weight is within 10% in each example.

Example 2 Width 1 made of polyester filament with single yarn fineness 6d
When obtaining a 00 cm non-woven web by the spun pond method,
Unstretched filaments from three spinnerets with 68 nozzles were each introduced into three airsucker and corona discharge devices similar to Example 1 arranged 300 mm apart in the width direction of the web.

Immediately below that, a channel was set with a setting angle of the suspension fulcrum with respect to the net traveling direction (angle α shown in FIG. 1) being 45 degrees. The channel used had a height of 200 mm, an inlet shape of 20 mm × 80 mm, and an outlet shape of 4 mm × 170 mm.

Each channel is connected by a connecting rod to the main channel having the same function as the device illustrated in FIGS. 5 and 6 suspended in the same suspension fulcrum setting direction via the shaft and the bearing attached to the lower part of the channel. It was connected.

For the main channel, set the distance between the swing action point of the channel (connection point with the channel of the connecting shaft) and the channel suspension fulcrum to 90 mm, and the distance between the channel outlet and the net conveyor to 600 mm. It was connected to an oscillating shaft that performs a reciprocating linear motion with an amplitude cycle of 30 mm and an oscillating cycle of 200 C / min in the perpendicular direction. As a result, the main channel performs the pendulum movement by the mechanism described in FIGS. 5 and 6, and is connected to the main channel by the connecting rod.
By making the same pendulum motion in one channel, the filament group was deposited on the moving net conveyor by the assisting action of the suction duct provided under the net conveyor, and sequentially laminated.

The formed non-woven web has an effective width of 100 cm and a basis weight of 52.
It was extremely uniform with no streaks in the width direction of g / m ² .

(Effect of the Invention) Since the nonwoven web manufacturing apparatus according to the present invention is configured as described above, by using this apparatus, it is possible to obtain a uniform web having a basis weight throughout the required width and The fiber arrangement can be changed freely. Therefore, by using the manufacturing apparatus according to the present invention, it is possible to easily cope with the balance of the tensile strength in the vertical direction and the horizontal direction, which is required from the end use of the nonwoven fabric.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an outline of the configuration of an embodiment of a nonwoven web manufacturing apparatus of the present invention in a state where a filament group is supplied. FIG. 2 is a partial cross-sectional view showing the details of the swing mechanism used in the nonwoven web manufacturing apparatus shown in FIG. FIG. 3 is a partial sectional front view showing another embodiment of the swing mechanism. FIG. 4 is a partial sectional plan view taken along the line IV-IV in FIG. FIG. 5 is a partial sectional front view showing still another embodiment of the swing mechanism of the present invention, and FIG.
FIG. 6 is a partial cross-sectional side view taken along the line VI-VI in the figure. FIG. 7 is a schematic plan view showing an example of a mechanism for simultaneously operating a plurality of swing channels using the swing device shown in FIG. 1 ... Filament group, 2 ... Air soccer, 3 ...
Corona discharge unit, 4, 33 ... Oscillation channel, 5
…… Suspension fulcrum, 6 …… Swing axis, 8,28 …… Bending member,
9 ... Bearing box, 10, 22, 27 ... Slide shaft, 11 ... Connecting shaft, 12, 29 ... Shaft, 13, 1
8,23,26,20 ... Bearing, 14,20,24 ...
Oilless metal, 17 ... Channel support bar, 19
…… Brackets 21,25 …… Common bearing box, 32 …… Coupling rod, 40 …… Net conveyor, Arrow A
Each of G to G indicates the moving direction of the corresponding member, A ... Reciprocating linear motion of the swing shaft 6, B ... Sliding motion of the connecting shaft 11 in the bending member 8, C ... Sliding shaft 10 of the bearing box 9. Up and down movement along D, rotational movement in the bending member 8 of the connecting shaft 11, E ... pendulum movement of the swing channel 4, F ... accumulation movement of filament group on the net conveyor 40, G ... It is a movement movement of the net conveyor.

Claims (2)

[Claims] 1. A device for producing a non-woven web in which a filament delivery device is a channel having an elongated outlet shape, and is swung to deposit the filaments on a net conveyor. And a swinging channel suspended by a rotatable fulcrum so that a pendulum movement can be performed in any set direction with respect to the traveling direction of the net conveyor. Has a portion that can be mounted on the swing shaft at any angle so that the swing direction of the channel can be changed arbitrarily with respect to the net advancing direction. An apparatus for manufacturing a non-woven web, which is connected by a connecting member having a slide mechanism and a horizontal rotary slide mechanism. 2. The apparatus according to claim 1, wherein the swing channel is a main channel, and the filament delivery channel is connected to the channel so as to perform the same swing motion through a connecting mechanism.