JPS6320937B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a warp-warp laminated fabric at high speed without disturbing the parallel and equal spacing of warps.

BACKGROUND ART Conventionally, as a method for producing a nonwoven fabric, a method is known in which a warp and weft laminated fabric is produced by laminating warp and weft materials each having a large number of warps and wefts independently aligned. That is, in Japanese Patent Publication No. 50-40185 and Japanese Patent Publication No. 53-38783, a warp material having a liquid attached to its surface is caused to run horizontally, and a horizontal circulation conveyor in the latitudinal direction intersects with the warp material and has a different height. A method is described in which the cut weft material is placed and moved through an adhesion liquid, and the cut weft material is vertically moved in the former case, and the warp material is vertically moved in the latter case, so that the warp material and the weft material are laminated. has been done. When a circulating warp belt is used as warp material, a means is added to transfer the weft material attached to it onto another warp material, but regardless of which method the production speed is As the running speed of the horizontal circulation conveyor increases, the failure rate when transferring warp material increases, and there are certain restrictions on increasing production. As an improvement on this, JP-A-56
There is a technique described in the -123445 publication. However, the weft material used in this method is a parallel body of individual threads with each weft being independent, and by pasting selvedge material on this material, we cut the middle of the selvedge material to a length that corresponds to the width of the warp material. After cutting, the semi-lubbed weft material is run on a horizontal circulation conveyor and transferred to a warp belt to form a continuous body of weft material, and the weft material is attached to the warp belt before the warp is overlapped. This method involves cutting off half the selvedges while the yarn is in the same state as it is, and then changing the spacing between each independent yarn by expanding and contracting the rubber belt.This method can certainly improve the production speed, but it also increases the Even if the ears are fixed in a parallel body, it is not possible to maintain the weft arrangement on the warp belt at equal intervals, and when attaching the weft to the warp belt, the surface tension of the liquid on the warp belt causes Although it is theoretically possible to remove the half-ear part of a cantilevered fish, it is extremely difficult in practice because the latitude itself is unstable.

As a result of intensive research in view of the above-mentioned current situation, the present inventor has discovered that a large number of threads or thread-like bodies are arranged at regular intervals as weft material, and these are connected in the lateral direction with a large number of fibrous polymers. It was discovered that it is possible to produce warp and warp laminated fabrics at high speed without disturbing the parallel and even spacing of the wefts by using a machine, and the present invention was completed.The gist of the invention is to Using a conveyor that circulates in intersecting directions, a warp belt that circulates in the warp direction above or below the conveyor in a plane parallel to the conveyor, and a device that instantly moves the conveyor or the warp belt up and down, In the manufacturing method of warp/warp laminated cloth, in which a continuous body of weft material is formed in the warp direction, and then the weft material is continuously peeled off from the warp belt and laminated with the warp material, a large number of threads or thread-like materials are used as the weft material. The bodies are arranged at approximately regular intervals,
These are connected in the horizontal direction with a large number of fibrous polymers, and while the weft material is being transported by the first warp belt, the fibrous polymer of the weft material is melted or softened, and the fibrous polymer of the weft material is melted or softened. The present invention relates to a method for producing a warp-warp laminated fabric, characterized in that it is peeled off from a first warp belt by a second warp belt or another warp material set at a faster speed than the warp belt.

An example of the method of the present invention will be explained in detail below with reference to the drawings.

In the drawing, 1 is a conveyor that circulates in a direction intersecting with the direction in which warp materials 19 travel.
The conveyor described in Publication No. 38783 is adopted as is, and the conveyor 1 is equipped with a conveyor 1 that can sequentially cut long bodies of weft material supplied by a continuous supply device (not shown) for weft material consisting of a large number of wefts arranged in parallel. A cutting device is provided, and the cut weft material 3 is placed thereon, usually through water. A first warp belt 2 is located above the conveyor 1 and circulates in the direction of arrow A1, that is, in the warp direction, by the rotation of drums or rolls 5 and 6 while applying a liquid with a coating roll 4. Directly above it, it runs horizontally in a direction that intersects this. 7 and 8 are arms 9 and 1
0 and presser rollers 11 and 12 located at the tip thereof.
It is a warp belt vertical movement device having a warp belt vertical movement device, which instantaneously moves the warp belt 2 up and down by reciprocating rotation of the arms 9 and 10 in the arrow A2 direction, and transfers the weft material 3 on the conveyor 1 onto the warp belt 2. It is something that forces you to do something. Note that 13 and 14 are guide rolls for steadying and guiding the warp belt 2, 15 and 16 are combs for the warp belt 2, and 17 is a continuous body of weft material formed on the warp belt 2 in the warp direction. A heating device 18 is installed obliquely below the guide roll 14, and is used to melt or soften a large number of fibrous polymers that connect and fix the threads or filament arrays of the weft material 3. As described above, the warp material 19 is moved in the direction of the arrow A3 and aligned by the comb 20. 21
are guide roll groups 22, 22..., heating roll 2
3 and the cooling roll 24 in a substantially five-membered annular shape, and circulates in the direction of arrow A4, that is, in the warp direction, a part of which is inserted between the first warp belts 2. It is becoming. 25 is the second
This is another warp material used in place of the warp belt 21, and is transported in the direction of arrow A5, passing through a part of the guide roll group 22 and the guide roll 14, and passing between the first warp belt 2. At the same time, the longitudinal continuum 17 of the weft material is taken off in the direction of arrow A6 together with the warp material 19 in a sandwiched manner. 26 is a comb for the second warp belt 21 or the warp material 25. Note that 27 is a guide roll.

Next, the method of the present invention using the above-mentioned apparatus will be explained.

First, the conveyor 1 is driven, and the weft materials 3 are placed on the conveyor 1 at regular intervals. Normally, the upper surface of the conveyor 1 is always wet with water, so that when the conveyor 1 runs downwards, it normally passes over, for example, a cloth soaked with water. On the other hand, the surface of the warp belt 2 that drives the first warp belt 2 is coated with a liquid mainly composed of water, for example, by a coating roll 4. When the weft material 3 comes to a position where it overlaps the full width of the first warp belt 2, that is, directly below it, the warp belt vertical movement devices 7 and 8 are activated to instantaneously move the first warp belt 2 up and down. At this time, the weft material 3 is transferred onto the first warp belt 2, and by repeating the same operation, an unbroken longitudinal continuous body 17 of the weft material is formed and heated by the heating device 18. At this time, the large number of fiber polymers that fix the arrangement of the weft materials are easily melted or softened. During this time, the adhering liquid on the first warping belt 2 is concentrated, but the adhesion force is not reduced. The fibrous polymer of the weft material on the first warp belt 2 begins to soften as the solvent of the adhering liquid is heated and evaporated, and the weft material on the first warp belt 2 begins to soften.
The fibrous polymer can be melted or softened to the same extent as weft material without the fibrous polymer. During this time, at an appropriate time, the warp material 19 and the second warp belt 21 are
Alternatively, another warp material 25 may be run. These are all at the same speed, but normally their running speed is adjusted to be faster than the first warp belt 2 by a predetermined ratio. At the guide roll 14, the first warp belt 2 follows the circulation path again, but the warp continuous body 17 of the weft material leaves the first warp belt 2 and at the same time moves to the second warp belt 21 or another warp belt. The material is transferred onto the warp material 25. In this case, since the second warp belt 21 and the like are faster than the first warp belt 2, the yarn spacing of the subsequent weft material is widened, and in this state, the heating roll 23
It is bonded to the warp material 19 on the top and further cooled on the cooling roll 24, and the warp material 19 and in some cases further warp material 25 are bonded together.
The arrangement of the weft material 3 and the weft material 3 is fixed. At the guide roll 27, the second warp belt 21 follows the circulation path again, but the warp material 19 and the weft material 3 are taken in a stacked state in the direction of arrow A6.

Therefore, when the second warp belt is used, a product in which the warp material 19 and the weft material 3 are cross-laminated as shown in FIG.
Weft material 3 is placed between warp material 19 and 25 as shown in Figure B.
A cross-layered product is obtained.

The weft materials used in the present invention are, for example, Japanese Patent Publication No. 51-9067
As described in the above publication, while a large number of threads are arranged in a cylindrical shape at regular intervals and run, the polymer is supplied into the container through a small hole in a container that rotates at high speed and is placed in the center of the cylindrical arrangement. It can be obtained by ejecting and scattering using centrifugal force, and by connecting and fixing a large number of threads or filaments in the lateral direction. Examples of threads or filaments include single fibers, spun yarns, drawn tapes, split yarns, etc., regardless of whether they are organic or inorganic, and examples of polymers include single fibers, spun yarns, drawn tapes, split yarns, etc. A material that melts and softens is selected and used in consideration of the combination with the material of the thread, and examples include synthetic resins such as polyolefin, polyester, and polyamide, and copolymer resins such as ethylene-vinyl acetate copolymer.

As the warp material 19 used in the present invention, any known loose yarn or filamentous material may be used as appropriate depending on the application, taking into consideration the combination with the weft material. However, the comb 20 is not used when the warp material 19 is connected in the lateral direction, such as a split membrane cloth having a network structure made of a uniaxially stretched film.

Regarding the speed ratio of the first warp belt to the second warp belt or another warp material, for example, if the final weft density is 5 lines/25.4 mm, the weft density is 10 lines/25.4 mm.
If 25.4mm wires are used and the speed ratio is 1:2, the production speed will be doubled; if 15 pieces/25.4mm wires are used and the speed ratio is 1:3, the production speed will be tripled. The speed ratio suitable for the application may be set by considering the material of the weft, the thickness, the material of the fibrous polymer, and other factors.

Examples of means for melting or softening the fibrous polymer include blowing hot air and infrared irradiation.

The method for manufacturing the warp/warp laminated fabric of the present invention uses a weft material in which a large number of threads or filamentous bodies are arranged at regular intervals and are connected in the horizontal direction with a large number of fibrous polymers. While being transported by the first warp belt, the fibrous polymer of the weft material is melted or softened, and in this state, the second warp belt or another warp material, which is set in advance at a faster speed than the first warp belt, is Since it was decided that the yarn density of the target weft material would be obtained, the thread density of the weft material should be high, and the speed of the second warp belt or another warp material should be adjusted. The production speed can be easily increased by making the conveyor faster than the first warp belt, especially since the transfer due to vertical movement from the conveyor to the first warp belt is unrelated to the increase in production speed. There is no transfer failure in the process, and since the warp direction continuous body of weft material is connected in the lateral direction, weft alignment on the first warp belt, the second warp belt, or another warp material is easy. Without disturbing the example, the fibrous polymer of the weft material is melted or softened when it is peeled off from the first warp belt by the second warp belt or another warp material, so that the yarn density at the time of transfer is reduced. Changes can be made smoothly and reliably.

Example: High-density polyethylene flat yarn (also known as stretched tape) of 1000 denier and 6 mm width was used as the weft material 3.
Width made by arranging 3 wires every 25.4 mm and fixing the weft arrangement using a hot melt adhesive based on ethylene-vinyl acetate copolymer as a polymer material by the method described in Japanese Patent Publication No. 51-9067. 1.2
A long piece of weft material is prepared, and using the apparatus shown in Fig. 1, the weft material is first fed to the conveyor 1, and on the conveyor, it is cut by heating wire at intervals of 1.25 m to cut the weft material. At the same time, a constant interval was maintained between each cut weft material, and a 0.4% aqueous solution of polyethylene oxide was interposed between the cut weft material and the conveyor 1 as an adhesion liquid.

On the other hand, the first warping belt 2 at a speed of 40 m/min is
The longitudinal continuous body 17 of the weft material is formed on the belt 2 by moving up and down on the conveyor 1 at a frequency of times/minute, and the fibrous polymer of the weft material is melted while blowing hot air from the heating device 18. As the warp material 19, the same flat yarns as the weft material were arranged at a ratio of 2 25.4 mm apart, and this was run at a speed of 60 m/min, and a second thread-like warp that circulated at the same speed was prepared. The belt 21 is also run, and the warp direction continuum 17 of the weft material is transferred to the second warp belt 21 at the guide roll 14.
The yarn density is reduced by peeling it off from the first warp belt, the warp material 19 is bonded at the heating roll 23, and the laminated fabric is further heat-treated after passing through the cooling roll 24 and taken off. It is a laminated fabric as shown in Figure 2 A with two pieces per 25.4 mm,
When this was laminated to kraft paper, it had sufficient functionality as a reinforcing material for kraft paper.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing an example of an apparatus for carrying out the method for producing warp/warp laminated fabric of the present invention, and Figures 2 (a) and (b) show different products of warp/warp laminated fabric manufactured using the above-mentioned apparatus. FIG. 1 is a conveyor, 2 is a first warp belt, 3 is a weft material, 7 and 8 are first warp belt vertical movement devices, 1
7 is a warp continuum of weft material, 19 is a warp material, 21 is a second warp belt, and 25 is another warp material.

Claims (1)

[Claims] 1. A conveyor that circulates in a direction intersecting the traveling direction of warp materials, a warp belt that circulates in the warp direction above or below the conveyor in a plane parallel to it, and a device that instantaneously moves the conveyor or warp belt up and down. In a method for producing a warp-and-warp laminated cloth, in which a continuous body of weft material is formed on a warp belt in the warp direction using A large number of yarns or filaments are arranged at approximately regular intervals and are laterally connected by a large number of fibrous polymers, and while the weft material is being transported by the first warp belt. Weft/warp lamination characterized by melting or softening the fibrous polymer of the weft material and peeling it off from the first belt by a second warp belt or another warp material set at a faster speed than the first warp belt. How to make cloth.