JPH08100359A - Device for carrying fiber web - Google Patents

Abstract

PURPOSE: To provide the web-carrying device capable of producing good fiber web excellent in the quality over a long period without generating the turnover of the fiber web during the carriage. CONSTITUTION: A temporary press-adhering device 7 comprising a pair of upper and lower rolls 8, 9 disposed so as to nip the fiber-collecting surface of a conveyer 5 therebetween is disposed on the outlet side of a suction box 6, and the lower roll 9 is immersed in a liquid box 10 disposed below the upper roll 8. The formed web U is passed between the rolls 8, 9 on the outlet side of the suction box 6. The lower roll 9 reduces the air flow reversely directed to the travel direction of the web because of being disposed in the liquid box 10, and further, imparts a small amount of a liquid to the web U to remove static electricity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber web transporting device in a long fiber nonwoven fabric manufacturing process, and more particularly to a fiber web transporting process in which a spun fiber discharged from a spinneret is drawn and drawn and then transferred to the next process. It relates to the device.

[0002]

2. Description of the Related Art In transporting a fiber web, in particular, when continuously feeding fibers while moving them while accumulating them on a collecting surface of a moving net conveyor, a suction is performed at a position below the conveyor collecting surface (net). A suction box is provided for sucking the fibers through the collecting surface by the blower.

In this case, for example, in the process of drawing the thermoplastic synthetic fiber discharged from the spinneret, stretching and supplying it onto the conveyor, the suction box is surrounded by a conveyor block above the suction box from a spin block equipped with a spin pack. By surrounding the area up to the collecting surface with a consistent cover, the airflow generated at the top of the suction box is parallel to the vertical direction and uniform.

[0004]

However, if the periphery of the collecting surface of the net conveyor is surrounded by a cover or the like, the workability around the collecting surface is extremely deteriorated and the initial investment of the equipment becomes large. Therefore, various studies were conducted to enable stable operation without installing a cover, etc.
It turned out that there were the following problems.

That is, if the periphery of the suction box is not surrounded by the cover or the like as described above, the air flow in the upper part of the suction box flows in not only in the vertical direction but also in all directions, especially after the web passes through the suction box. Since the web is often turned over while traveling on the conveyor, the quality is remarkably deteriorated, and the rotation speed of the net conveyor can be increased only to the extent that the turning does not occur, which makes it difficult to manufacture a low basis weight nonwoven sheet. there were.

An object of the present invention is to solve the above conventional problems and to provide a fiber web transporting device capable of producing excellent products of good quality for a long period of time.

[0007]

DISCLOSURE OF THE INVENTION The present invention is an apparatus for producing a continuous fiber non-woven fabric, in which fibers taken by rollers, air suckers, etc. are continuously supplied onto a moving net conveyor and conveyed to the next step. A suction box for sucking and depositing fibers supplied from an air sucker or the like on the conveyor collecting surface is disposed below the collecting surface of the conveyor, and the conveyor collecting surface is sandwiched on the exit side of the suction box. The fiber web transporting device is provided with a temporary pressure bonding device composed of a pair of upper and lower rolls arranged above and below the roll. In this case, it is preferable that the lower roll of the temporary press-bonding device is provided in a liquid box containing the liquid so as to be immersed in the liquid.

[0008]

[Function] The fibrous web deposited on the collecting surface of the net conveyor moves in a state of being sucked in the suction box, but is temporarily crimped by upper and lower rolls provided so as to hold the collecting surface on the exit side. Therefore, it is possible to prevent the occurrence of turning over after the delivery side. In particular, since the lower roll of the temporary pressure bonding device is immersed in the liquid box, it suppresses the air flow generated in the direction opposite to the web traveling direction.

Therefore, it is possible to obtain a sheet having a good texture and to increase the rotation speed of the net conveyor, so that it is possible to manufacture a nonwoven fabric sheet having a low basis weight. Also, since a small amount of water is applied to the back surface of the web from the lower roll through the collection surface, the effect of removing static electricity generated in the web can be obtained, and the single fiber winding around the upper roll is significantly reduced, and the next step It becomes easy to transfer the sheet to the thermocompression bonding device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a layout diagram showing an embodiment of the present invention.

In FIG. 1, reference numeral 2 denotes a spinneret mounted on a spin pack 1, and below the spinneret 2 is provided an air sucker 3 for drawing and drawing a spun fiber Y by a compressed air flow. . Although the air sucker 3 is shown in this embodiment, a means having the same function, for example, a device such as a roller may be used. Further, an endless type net conveyor 4 for collecting the fibers Y discharged from the air sucker 3 is disposed below the air sucker 3.

At the position of the net conveyor 4 corresponding to the air sucker 3, a suction box 6 for sucking the fiber group discharged from the air sucker 3 through the collecting surface 5 is provided between the collecting surfaces (net surfaces) 5. It is provided. The suction box 6 is opened in a direction facing the collection surface 5 of the net conveyor 4, and is formed so that a suction flow is generated on the collection surface 5 at the upper position through the opening by a suction blower (not shown).

Reference numeral 7 denotes a temporary crimping device provided on the outlet side of the suction box 6, and a pair of upper and lower crimping rolls composed of an upper roll 8 on the upper side and a lower roll 9 for backup on the lower side of the collection surface 5. A liquid box 10 which has partial rolls 8 and 9 and which contains a liquid for dipping the lower roll 9 is provided below the collecting surface 5 so as to surround the lower roll 9. Reference numeral 11 is a thermocompression bonding device provided at a position downstream of the temporary pressure bonding device 7.

In such an apparatus, the fiber Y spun from the spinneret 2 is drawn by the air sucker 3 which is taken up by the compressed air flow, and is discharged onto the collecting surface 5 of the net conveyor 4 below. The webs U are accumulated to form a web U, and the net conveyor 4 is driven to rotate to advance in the direction A.
It is thermocompression bonded by the thermocompression bonding device 11 to obtain a nonwoven fabric sheet.

In depositing the web on the collecting surface 5,
By the suction force from the suction box 6 through the collecting surface 5 of the net conveyor, the air flow from the air sucker 3
The fiber group falling downward is suctioned in the S direction in an orderly manner, and taken up on the collecting surface 5 of the net conveyor 4 which advances at a constant speed. The web U accumulated on the collecting surface 5 advances while being sucked by the suction box 6, and passes between the upper and lower rolls 8 and 9 of the temporary pressure bonding device 7 located on the exit side thereof, where the web is After being temporarily crimped and in a stable state, it is sent to the thermocompression bonding apparatus in the next step and thermocompression bonded.

In this case, a temporary crimping device 7 is provided on the exit side of the suction box 6, and since the web is temporarily crimped here, the web is prevented from being turned over from the exit side of the suction box 6. .

In particular, in the present invention, the lower roll 9 is immersed in the liquid box 10. Therefore, it is possible to suppress the air flow generated in the B direction, which is the opposite direction to the direction in which the web advances due to the rotation of the lower roll. It is possible to prevent the web from curling up before the roll due to this, and to obtain a sheet with a good texture.

Furthermore, since the rotation speed of the net conveyor can be increased, it is possible to stably manufacture a low basis weight nonwoven sheet. Further, since water is applied from the lower roll 9 to the back surface of the web through the collecting surface 5, static electricity generated in the web is effectively removed.
The wrapping of fibers around the upper roll 8 is greatly reduced, and the sheet passing operation to the thermocompression bonding apparatus in the next step becomes easy.

As the liquid L to be put in the liquid box, it is preferable to use water in consideration of economical efficiency, handleability, stability, etc., but depending on the operation or manufacturing conditions, an emulsion containing a spinning oil agent or the like is used. You can also

[0020]

As described above, according to the present invention,
It is possible to obtain a sheet with a good texture without curling the web, and to increase the rotation speed of the net conveyor, so that it is possible to stably manufacture a low basis weight nonwoven sheet. Further, static electricity generated in the web is effectively removed, and a remarkable effect that a product of excellent quality can be manufactured satisfactorily and stably over a long period of time is exhibited.

[Brief description of drawings]

FIG. 1 is a layout view showing an embodiment of the present invention.

[Explanation of symbols]

 2 Spinneret 3 Air sucker 4 Net conveyor 5 Collection surface 6 Suction box 7 Temporary pressure bonding device 8 Upper roll 9 Lower roll 10 Liquid box 11 Thermocompression bonding device

Claims (2)

[Claims] 1. A manufacturing apparatus for a long fiber non-woven fabric, wherein fibers taken up by rollers or air suckers are continuously supplied onto a moving net conveyor and conveyed to the next step, at a position below a collecting surface of the net conveyor. A suction box for sucking and depositing fibers supplied from an air sucker or the like on the conveyor collecting surface is arranged, and a pair of upper and lower parts arranged above and below the suction box so as to sandwich the conveyor collecting surface. An apparatus for transporting a fiber web, which is provided with a temporary pressure bonding device including partial rolls. 2. The fiber web transporting device according to claim 1, wherein the lower roll of the temporary press-fitting device is provided in a liquid box containing a liquid so as to be immersed in the liquid.