JPS60126358A - Production of fiber interlaced sheet - 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 The present invention relates to a method for producing an intertwined fiber sheet, and more particularly to a method for producing an intertwined fiber sheet with improved surface smoothness, surface density, and entanglement.

Conventionally, the needle punch method has been widely used as an M&fiber receipt entanglement treatment, and has become a general-purpose technique in the field of nonwoven fabrics, especially artificial leather.

In recent years, the high-speed fluid punching method, which had been discovered for a long time as a unit technology, has been widely used, and some fiber sheets 1-
It has been put to practical use in the intertwining of

In this conventional high-speed fluid punching method, a fiber sheet is placed on a conveyor net moving at a constant speed, and a high-speed fluid flow impinges on the fiber sheet to cause entanglement. Punching with a high-speed fluid makes it possible to highly entangle and densify a thin fiber sheet, resulting in a high density that cannot be obtained with conventional needle punching. For example, in order to provide strength in the width direction of the seat, a fluid jet nozzle is made to swing in the width direction of the seat 1, as shown in Japanese Patent Publication No. 47-30740. is also publicly known.

However, in these conventional methods, the surface fibers move deep inside the fiber sheet to the back surface where the high-speed fluid flow collides with the back surface of the sheet, causing entanglement. The surface uniformity was extremely poor because only the areas where the collision occurred remained in the form of grooves, deep depressions, and lines of unevenness.

In order to improve this shortcoming, ■ the pressure applied to the fluid is changed for each process, and the collision energy of the high-speed fluid flow is changed and repeated;
I5/l-27064 Publication and JP-A-55-62256
As shown in the publication, methods such as ``give rotational motion to the injection nozzle in a plane parallel to the sheet surface so as to draw a spiral curved trajectory on the sheet surface'' have been proposed. However, even with these methods, a fiber entangled sheet with good surface uniformity could not be obtained.

In other words, in method (2), even if the treatment was repeated many times with different pressures, the parts that were hit by the last treatment remained as grooves, so the surface irregularities were still large. .

In addition, in method (■), sea 1 to
Since the surface is filled in, there are fewer parts that are not hit, but a spiral curve remains on the surface from sea 1 to the surface, and at the intersection of the spiral curves, there is a double impact state, which causes damage to other parts. The disadvantage is that a new non-uniform surface with a high density of entanglements is created.

The purpose of the present invention is to eliminate the drawbacks of the prior art as described above,
It is an object of the present invention to provide a method for producing a dense fiber entangled sheet 1 which has excellent surface smoothness and in which the fibers in the surface layer of the fiber sheet 1 are extremely highly fibrillated and intertwined.

The configuration of the present invention that achieves the above object is such that when a high-speed fluid stream discharged from a jet nozzle that is oscillated linearly in the width direction of the sheet collides with the surface of the traveling fiber sheet to entangle the fibers, the jet The nozzle amplitude is equal to or greater than the injection nozzle arrangement pitch, and the swing speed is
The collision area of high-speed fluid flow is 100% or more in the range of at least 90% or more of the sheet surface area excluding 4 parts J: 5
Hit below 00%! This is a method for manufacturing an intertwined fiber sheet, characterized in that the sheet has a density of J.

The present invention will be explained in more detail based on the drawings.

FIG. 1 shows an example of a nozzle swing pattern (triangular waveform) in the method for manufacturing an intertwined m-fiber sheet according to the present invention, and FIGS. 2 and 3 show other nozzle swing patterns of the present invention. This is an example.

Further, FIGS. 4 and 5 show an example of a nozzle swing pattern for multiple strokes according to the present invention.

In FIGS. 1 to 5, the X axis (sheet width direction) (J nozzle swing speed 1) and the Y axis represent the sheet 1 to advancing speed.

Figure 1 shows a nozzle device in which nozzles with a high-speed fluid jet aperture diameter d are arranged in a straight line in the sheet width direction at an arrangement pitch P, and the nozzle device is oscillated in the X-axis direction with an oscillation vJ amplitude that is twice the nozzle pitch P. The impact marks a (
The swinging return angle α (see FIG. 1) of the nozzle is set so that the hatched portions overlap without any gaps, and the impact locus is shown when the sheet surface is filled with impact traces a.

As shown in Fig. 1, the impact traces a caused by the high-speed fluid flow of each nozzle do not overlap (also, the swing pattern that fills the surface of the gap 41 is referred to as 100% impact as the standard value of the impact density). .

The effective striking part is the central part of the nozzle swing pattern shown in the figure, and corresponds to the swing amplitude I+] at both ends α)
are cut as ears in a later process.

In addition, part b is a non-battered part, and the area of the single non-battered part is determined by the nozzle injection aperture d, the nozzle arrangement pitch P, and roughly the swing turn-back angle α, and the number of occurrences is determined by the number of nozzle swing turn-backs and the number of nozzles. It is the product of In other words, the ratio of the area of the striking part to the total surface area of the sheet is expressed as: total sheet surface area - [single area of unstruck part x number of nozzle swing turns x nozzle vj, 1/total sheet surface area.

As a result of the above, in order to reduce the area occupied by the unimpacted parts on the sheet surface, it is possible to reduce the area occupied by the unimpacted parts by setting a large nozzle swing amplitude and increasing the impact area of the high-speed fluid flow per unit number of turns. On the other hand, by setting the nozzle swing amplitude small, the area occupied by the unhitted part increases. Examples of swing patterns showing this are shown in Figures 2 and 3.
As shown in the figure.

Figure 2 shows the impact pattern when the nozzle swing amplitude is increased to 1.5 times as large as that in Figure 1, and the nozzle swings at three times the nozzle arrangement pitch P. The area of the striking part is 1/1.5 times that of FIG.

Fig. 3 shows the impact pattern when the nozzle swing amplitude is 172 times smaller than that in Fig. 1 and the nozzle is oscillated with an amplitude equal to the nozzle arrangement pitch P. The area of the window will be twice that of Figure 1.

Figures 4 and 5 illustrate the nozzle swing pattern in the case of multiple strikes with a striking density of 100% or more, and Figure 4 shows double strikes on the seal surface in one nozzle swing process. Fig. 5 shows the oscillation pattern when the nozzle is
The rocking pattern is shown when the sheet surface is triple-impacted in the rocking process.

In FIG. 4, a nozzle N with a high-speed fluid jet aperture d is shown.
1. N2...I'Jn are arranged in a line in the sheet width direction at equal pitches P, arranged in a line in the X-axis direction, and oscillated in the X-axis direction.

Here, 50% of the impact trace area of nozzle N1 is
It is struck by the nozzle N2 adjacent to Nozzle 1, and this part becomes a double striking part e (shaded part). Further, of the impact trace area of the nozzle N2, 50% of the remaining impact trace area that was not overlapped by the nozzle N1 is struck by the nozzle N3 adjacent to the nozzle N2, and this part is also a double impact area as described above. e′
becomes.

Thereafter, similarly adjacent nozzles N4, N5...N
72, successive double impact parts e of 50% parts each,
C'... is constructed.

As mentioned above, the swing pattern in which the sea 1 surface is continuously hit twice in one swinging process of the nozzle is referred to as a striking density of 200%.

Next, in FIG. 5, the nozzle arrangement is the same as in the case of FIG. become. Furthermore, nozzle N3 adjacent to nozzle N2
As a result, the remaining 1/3 part of the area of the impact trace of the nozzle N1 is impacted, and this impact area becomes a triple impact area f (hatched area).

Thereafter, each adjacent nozzle N4. N5...
・Triple striking part f' of 1/3 part sequentially by Nn...
Continuously form...

As described above, a swing pattern of continuously performing triple blows on sea 1 to the surface in one swing process of the nozzle is created at a blow density of 30.
It is called 0%.

Although not shown, it is possible to either make the nozzle 1 moving bed speed X faster than the example shown in FIG. By this method, by setting conditions that increase the overlapping area of impact traces caused by adjacent nozzles in one culm of one swing, it is possible to perform arbitrary high-density processing of 300% or more.

The nozzle arrangement is limited to the one-row linear arrangement illustrated here, and may be a linear arrangement of two or more rows, or even a staggered arrangement.

According to the method of the invention, the fiber sheet 1 moving at a constant speed
For ~, a) Sheet moving speed, Mouth) Nozzle injection hole diameter (impingement area of high-speed fluid flow on the fiber sheet surface), and C)
Set each condition of the nozzle arrangement interval (high-speed fluid jet injection density) to the desired condition, make the amplitude of the injection nozzle equal to or greater than the injection nozzle arrangement pitch, and set the swing speed relative to the sheet advancing speed. In the range where the impact area of the high-speed fluid flow created by the impact area is at least 90% or more of the surface area excluding the ears, the impact density of the impact trace is 10
The surface of the sheet is uniformly filled by covering it so that it is 0% or more and 500% or less.

This results in a smooth surface with less unevenness and no unevenness in density.
Moreover, it becomes possible to obtain a dense fiber entangled sheet with high entangling properties.

In the present invention, when the swing amplitude is less than the nozzle arrangement pitch, the impact trajectory due to continuous high-speed fluid flow in the swing direction of adjacent nozzles is not equalized, and the impact trajectory is only for each nozzle itself, and the nozzle arrangement Since an unimpacted area corresponding to the difference in vibration amplitude between the bits occurs along the sheet traveling direction, the surface smoothness is extremely poor.
This will be the seat surface.

Here, when the impact area of the high-speed fluid flow is at least 90% or more of the surface area of the sheet 1 excluding the selvedges, it means that the area where the impact area of the high-speed fluid flow is at least 90% or more of the surface area of the sheet 1 excluding the selvedges is not hit as explained in FIGS. 2 and 3. This is the ratio of the area of the striking part a to the area of the part, and in the present invention, it is important that the area of the striking part a be 90% or more. In other words, the area of striking part a is 9
When the TC is 0% or more, there are many unhitted parts, and these parts appear as streaks on the surface of the fiber elf sheet.

On the other hand, in the iJ3 of the present invention, the impact density is set to 100% or more and 500% or less in one treatment, but when the impact density is 100% or less, the impact area becomes extremely concave compared to the unhit area. It remains as a streak. Also, the impact density is 500%
In the above high-density processing, the entanglement of each fiber is almost completed, and the movement between the fibers on the surface of the fiber sheet becomes difficult. The fibers are cut by the energy of Jζ due to the collision of the high-speed fluid flow, resulting in a fiber-entangled sheet with poor strength.

In the present invention, by setting the impact density to 150% or more and 300% or less, a fiber sheet with even higher entangling efficiency and good surface uniformity can be obtained.

The oscillating waveform of the injection nozzle is preferably a straight triangular folded waveform, but a sine waveform may be used to alleviate the inertial force of the folded part.

The present invention is characterized in that the impact density is set to 100% to 500% in one treatment, and in this case, for example, the impact density is 50% in one treatment.
00% may be further repeated multiple times, and if it is desired to obtain fiber sheet 1- with a high basis weight, it is preferable to perform the treatment multiple times alternately on the front and back sides.

When carrying out the method of the present invention, it is necessary to accurately position and swing the nozzle unit, which has a high pressure-resistant structure and is necessarily a heavy structure. A fiber entangled sheet manufacturing apparatus suitable for the following will be described in detail with reference to the drawings.

FIG. 6 is a schematic plan view showing an example of a fiber entangled sheet manufacturing apparatus, FIG. 7 is a right side view of FIG. 6, and further FIG. 8 is a sectional view taken along line A-A in FIG. An example of a nozzle device for sheet production is shown.

The apparatus shown in FIG. 6 consists of a fiber entangling sheet, -1- manufacturing nozzle device 1, a conveyor system N2.11 navy blue sheet 3, and a conveyor net 4 for conveying the fiber sheet. A nozzle head 8 (see FIG. 7) equipped with a downward-opening high-speed fluid jet nozzle is located in the section, and the nozzle head 8 faces the surface of the conveyor net 4 and is spaced apart in the width direction of the sheet. Many are placed.

The fiber sheets 1 to 3 loaded on the conveyor net 4 are conveyed at a constant speed in the direction of the arrow.

Furthermore, as shown in FIG. 2, the conveyor nets 1 to 4 are constructed in a convex shape with the apex being the collision part of the high-speed fluid flow jetted from the high-speed fluid jet nozzle attached to the nozzle spatula 1. At the convex apex position, there is an opening that penetrates the fiber sheet 3 and the conveyor net 4 to allow the high-speed fluid flow to pass through and be discharged without staying in the fiber sheet or in the V & set comb 1 and the conveyor net (8). A fluid discharge pipe 27 is arranged for collecting and discharging the fluid flow having 28 , which at the same time supports the conveyor 4 .

Here, it is preferable that the structure of the conveyor net 4 is convex upward when water is used as the high-speed fluid flow.
This was done in order to make it easier for residual water such as reflected water that was not drained by the fluid discharge pipe 27 to flow out along the convex surfaces of the conveyor nets 1 to 4. There is no problem.

The conveyor net 4 constructed as described above is moved at a constant speed by a conveyor drive motor 5, a drive roller 6, and a driven roller 7.

In the nozzle device 1 for producing a shime V fiber entangled sheet shown in FIG. It consists of a high-speed fluid jet nozzle 10 in which a plurality of fluid jet jet holes are drilled in the width direction of the sea 1, a pressure plate 11 that supports the nozzle against high pressure fluid, and a pressure plate mounting bolt 21. The high-pressure fluid pressurized by a pressure pump (not shown) flows into the nozzle head 8 through the high-pressure fluid port 29, fills the upper flow path 30, and flows in the axial direction between the upper and lower flow paths. The water flows into the lower flow path 32 through a plurality of upstream and downstream flow communication holes 31, with the flow rate being distributed in the axial direction. The high-pressure fluid (after being rectified by the rectifying plate 9 arranged in the center of the lower flow path 32, the injection hole of the high-speed fluid injection nozzle 10 arranged at the end of the flow path that is connected to the lower flow path in a continuous slit shape) By passing through, it becomes a high-speed fluid flow and is discharged.

The nozzle head (to which the high-speed fluid flow generation mechanism is connected) is supported by supports @ 15.16 at both ends of the nozzle head, and the support shaft 15. The bearing 13 is supported by a bearing 13 containing a bearing 19 that rolls and guides the nozzle head 180 in order to obtain an optimum working posture during the reciprocating rocking movement of the nozzle head 8 and when replacing the high-speed fluid jet nozzle 10. Loads rotational motion during reversal.Furthermore, at the tip of the support shaft 15 is an actuator that linearly reciprocates the nozzle head 8 in the sheet width direction via a rotatable joint 1 that can load tensile and compressive loads. An electro-hydraulic stepping cylinder 12 is installed.

On the other hand, a spline 11 is machined at the distal end of the support shaft 1G, and a spline shaft joint 17 is connected to the spline 11 by linear guide. The spline shaft joint 17 is fixed to the housing 20 with a key 22 to prevent rotation, and the tip of the housing 20 is equipped with a worm reducer used as an IK force device. It is fixed with a set screw (both not shown).

The combination of the spline shaft joint 17 and the worm reducer 18 reduces the vibrations generated during the reciprocating oscillation of the nozzle head 8 through the spline shaft joint 17 and the worm speed reducer. It can be loaded with 18 boosters. Further, by the guided connection of the spline shaft joint 17, linear reciprocating rocking motion can be performed freely.

Furthermore, when the nozzle head 8 is reversed when replacing the high-speed fluid jet nozzle 10, torque is transmitted through the spline shaft joint 17 fixed to the output shaft by rotating the input horn shaft of the worm reducer 18. can be reversed to any angular position, and furthermore, the worm deceleration FMis
The inverted position can be maintained by a boosting mechanism.

A feature of the nozzle device applied to the method of the present invention in which the above-mentioned mechanism is arranged in the sheet width direction is that the nozzle head 8, which is inevitably heavy (number of surfaces +] g) due to its high pressure-resistant structure, swings. The actuator uses an electro-hydraulic stepping cylinder 12 with high output and high-speed response.

FIG. 9 is a sectional view showing the structure of the electrohydraulic stepping cylinder 12.

In FIG. 9, the step-like rotational displacement of the electric stepping motor 23, whose rotation is controlled by pulses transmitted by a pulse generator (not shown), is converted into a linear displacement by a screw 11124, so that the screw shaft 24 is Hydraulic force is amplified through a screw-connected valve spool (three-way valve) 25, and the inside of the cylinder 26 is linearly displaced in response to the rotational displacement of the electric stepping motor 23.

The working oil pressure is introduced into the cylinder 26 via the ps from a hydraulic pump (not shown), and is returned to the tank via the pt.

As described above, the electro-hydraulic stepping cylinder of the type in which the hydraulic 1-nervo valve is directly driven by a pulse motor has high output, high-speed response, and can perform precise stop position control.

For example, if the inner diameter of the cylinder is 30 mm, the thrust speed is 100 mm/sec, and the working pressure is 70 kq/C.
At m2, both push and pull sides 140kq, speed 60mm/sec, working oil pressure 70kg/C
At tl12, both push and pull sides weigh 210 kg ■ Resolution: 0, 1 mm/5tep ■ Maximum speed: 100 mm/sec (100 opps).

In addition to the electro-hydraulic stepping cylinder, systems such as a hydraulic servo mechanism, a combination of a DC servo motor and a precision feed screw mechanism are also effective as the nozzle swing actuator.

As mentioned above, an electro-hydraulic stepping cylinder with a built-in digital control valve with high output and high-speed response is used as an actuator to accurately position and swing the nozzle unit, which has a high pressure-resistant structure and is inevitably a heavy structure. By using it, it becomes possible to carry out the method for producing an entangled fiber sheet according to the present invention.

In the high-speed fluid flow treatment of the present invention, the fluid used for the high-speed fluid flow may be liquid or gas, but water is most preferably used in terms of ease of handling, cost, and amount of collision energy as a fluid. . Furthermore, organic solvents, alkali, acid aqueous solutions, etc. may also be used depending on the purpose.

The fluid is pressurized by a high-pressure pump and is jetted from a discharge hole with a small diameter, and is sprayed onto the fiber sheet surface as a high-speed columnar flow.

As for the pressure conditions, a range of about 5 to 300 kg/cm2 can be used. At a pressure lower than 5 ko/cm2, there is little entanglement effect, and at a pressure higher than 30'Okg/cm2, impact defects and deformation occur. The preferred range is 20-2'00k
a/cm2, further t) Tma I, <ha 30~15
0 kg/am2.

Next, as fiber sheets that can be used in the present invention, ordinary non-woven fabrics (i), laminates of woven or knitted fabrics and non-woven fabrics (i),
Laminated bodies of nonwoven fabrics with different properties are used to make cards,
It can be manufactured by forming a sheet by a sheet forming method such as a cross wrapper, a random web forming method, a filament web forming method, or a paper making method, and further fixing the structure by a method such as needle punching or secondary fluid punching as necessary. .

Natural fibers, chemical fibers, synthetic fibers, or a combination of these fibers can be used to constitute and cover the fiber sheet used in the present invention.

The present invention achieves the following excellent effects by being constructed as described in detail above.

In other words, the amplitude of the injection nozzle is set to be equal to or greater than the injection nozzle arrangement pitch, and the swing speed is set to 1 of the sheet.
The collision area of the high-speed fluid flow created by the relative velocity with respect to the sheet traveling speed, excluding 1 part, is within a range of at least 90% or more of the surface area of the sheet 1, and is 100% or more5
By adjusting the impact density to be 0.00% or less, it is possible to obtain a high-quality fiber entangled sheet 1~ with a uniform impact density, high entanglement property, excellent surface smoothness, and high surface density. can.

The fiber shoulder 1 entangled sheet 1~ obtained by the treatment method of the present invention has a high density and uniform surface as it is, and can be applied to industrial and material applications as a highly flexible sheet 1~. However, it can also be dyed and applied to clothing.

In addition, the method of the present invention can easily obtain sheets 1 to 1 made of ultrafine fiber bundles, and can also easily form a fibrillated entangled layer from the ultrafine fiber bundles, so that it is suitable for the above-mentioned applications. In the field of leather, where polyurethane films were conventionally laminated to create a silver surface, ultrafine fiber bundles similar to natural leather can be used to create new fibers with a prilled and entangled surface. It is possible to obtain sheets. Therefore, the treated sheets 1 to 1 obtained in the present invention can be widely used as base materials for artificial leather, and can be used for natural leathers such as silver (q artificial leather, nubuck-like artificial leather, suede leather), etc. It becomes possible to expand the application.

The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited to these Examples. All percentages used in the examples are expressed in weight.

Example 1 50 parts of polyethylene terephthalate was used as the island component of the ultrafine fiber bundle, and polyethylene glycol (1 molecule
A polymer array fiber type multi-component fiber set consisting of 50 parts of polyethylene containing 5% i20000) and 16 items was spun into a 3.8 denier, 51 mm long staple, which was then spread, carded, and cross-wrapped. , through each process of needle punching, the fabric weight is 190 (1/'m2. thickness 1.Qm).
m fiber sheet surface Next, the IIAM sheet was made with a hole of 0.13 mm in diameter O0.
Pressure 801 from injection nozzles lined up in a row with a 6mm pitch
(A columnar water stream is ejected at g/cm2, and the injection nozzle is oscillated in a straight line with a stroke of 5 mm on one side and a number of reciprocations of 5 times/second.The apertures are opened so that the locus of the collision area of the columnar water stream overlaps by 300%. 80 mesh conveyor net
Drying was carried out by repeating the process of spraying a high-speed water stream onto one side four times while continuously transferring the sample at a speed of 0.25 n+/min. The unhitted part of the sheet center part 1- excluding the ears is O.

Separately, as a comparative example, a fiber sheet made in the same way was heated to 800 ml by applying a fixed injection nozzle (the nozzle was not oscillated) in which holes with a diameter of 0.13 mm were arranged in a row at a pitch of 0.6 mm.
The process of spraying a columnar water stream at ka/cm2 was repeated four times and dried.

After both treatments! When Ii fiber entangled sheets were compared,
The surface of the inventive example is very smooth, and the ultrafine Ili fibers are evenly intertwined, whereas the comparative example has concave streaks in the columnar water jet area, and the surface smoothness is poor. It was bad.

After both treatments, the fiber-entangled sheet is impregnated with polyurethane emulsion, the polystyrene is removed with perchlorethylene, and the texture is added using an embossing roll carved with leather-like grains, and then dyed and colored to create rooted artificial leather. As a result, the leather according to the present invention exhibited a feel, surface morphology, and soft texture just like natural leather, whereas the leather according to the comparative example had a marked unevenness in the form of streaks on the surface, and had a poor feel and texture. It was rough and not good.

Furthermore, when the bending properties of both leathers were measured in accordance with JIS K6545-1970, the present invention showed no particular abnormality on the surface even after being bent 100,000 times, whereas the comparative example had cracks on the surface after being bent 30,000 times. , it showed a cracked condition.

Example 2 Nylon 6 and styrene copolymer (higher alcohol copolymer of styrene and acrylic acid) were mixed at a nylon 6/styrene copolymer ratio of 50150 to produce a mixed-spun type multicomponent fiber. Spun, 4 denier, 51
It is made into a staple of 1 ml length and passed through the steps of opening, carding, cross-wrapping, and twenty-one dollar punching to a thickness of 3. Qm
It was made into a fiber sheet with a fabric weight of 540a/m2.

While showering the obtained llf sheet to remove polyvinyl alcohol, it was heated under a pressure of 60 k (1
/Cm2 and was repeatedly sprayed with a high-speed columnar water stream three times from both sides to dry.

On the other hand, for comparison, drying was performed by simply spraying a high-speed columnar water stream three times from both sides using a nozzle fixed at 60 k (1/cm2).

When the fiber entangled sheets after both treatments were compared, the surface of the inventive example was extremely densely intertwined and had sufficient smoothness, whereas the comparative example had noticeable streaks due to spraying and the surface was rough. The intertwined state also had unevenness in density and unevenness between the peaks and valleys of the fibers.Furthermore, both fiber entangled sheets were impregnated with a 5% solution of polyurethane, and after wet coagulation, The material was gravure-coated with a polyurethane resin solution, and then embossed using an emboss roll engraved with comparative grains, and then dyed and colored to produce netsuke artificial leather.

The example of the present invention has a feel and surface condition similar to that of natural leather (
15 and had a soft texture, whereas the comparative example had noticeable streak-like irregularities on the surface and did not have a good feel.

Furthermore, when both leathers were subjected to a repeated cJJ shear fatigue test using a Scotto-type cyclic shear fatigue tester at an elongation rate of 25%, the present invention showed no abnormality even after 50,000 cycles, but the comparative example showed no abnormality after 20,000 cycles. It showed a cracked state at the time.

[Brief explanation of the drawing]

Figure 1 shows the production capacity of the fiber entangled sheet according to the present invention.
5 shows an example of a nozzle swing pattern (triangular waveform), and FIGS. 2 and 3 show an example of another nozzle swing pattern of the present invention. Figure 4 [J] shows the nozzle swing pattern that occurs when the impact density of the present invention is 200%;
The figure shows the nozzle rocking pattern of the present invention when the impact density ζ is 300%. FIG. 6 is a schematic plan view showing an example of a fiber entangled sheet manufacturing apparatus, and FIG. It is a right side view of Fig. 6. Fig. 8 is a right side view of Fig. 6.
It is a sectional view showing an example of a nozzle rocking device. FIG. 9 is a sectional view showing the structure of an electro-hydraulic stepping cylinder. a: Impact trace b: End impact area P: Nozzle arrangement pitch d: Nozzle high-speed fluid jet jet aperture α: Swing folding angle a: Ear area effective impact area N1 to Nn: Nozzle number 1: For manufacturing fiber entangled sheets Nozzle device 2: Conveyor device 3: Fiber sheet/l: Net conveyor 5: Net conveyor drive motor 6; Drive roller 7: Followed roller 8: Nozzle head 9: Straightening plate 10: High-speed fluid jet nozzle 11: Pressure plate 12: Electro-hydraulic stepping cylinder 13:@Uke 1
4: Joint 15. 16: Support shaft 17: Spline shaft joint 18: Worm reducer 1: Bearing 20: Housing 2
1: I4 pressure plate handle A' bolt 22: Key 23: Electric stepping motor 24: Screw shaft 25: Valve spool 26: Cylinder 1'-do 27: Fluid discharge pipe 28: Open L' part 29: High pressure fluid manhole 30 :Upper flow path 31:Upper and lower flow path communication hole 32:Lower flow path Patent applicant Toshi Co., Ltd.; Title 2. Name of the invention Method for manufacturing fiber entangled sheets 3. Person making the amendment 4. Amendment order 1] Attachment 5. Number of inventions increased by the amendment 0. 6. Details of the invention in the specification to be amended "Explanation" column and Drawing 7, contents of the amendment (1) Page 2, lines 14-15, "on the back of the sheet" is amended to "on the front of the sheet". 2) Page 2 In lines 18 and 19, "deep like a groove" is corrected to "deep like a groove". (3) Page 11, line 2 “Figure 2 with the edges of the sheet removed”
is corrected to "Figures 1 and 2 excluding the edges of the sheet." (4) On page 13, line 9, delete "-C many at 1 interval". (5) Correct “Figure 2” on page 13, line 12 to “Figure 7.” (6) Delete page 24, line 5, front F. (7) Figure 5 in the drawings shall be corrected as shown in the attachment.

Claims (1)

[Claims] When intertwining the fibers by colliding the high-speed fluid flow discharged from the Ill injection nozzle, which is oscillated linearly in the width direction of the sheet, against the running fiber sheet surface, The swing speed is set to be equal to or higher than that, and the swing speed is such that the impact density is 100% or more and 500% or less in a range where the impact area of the high-speed fluid flow is at least 90% or more of the sheet surface area excluding the ears. A method for manufacturing a fiber entangled sheet.