JP3581768B2 - Relaxing method and relaxing device for base cloth for artificial leather - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method and an apparatus for relaxing an artificial leather base fabric that continuously performs a relaxation process while transporting an artificial leather base fabric in which a nonwoven fabric is impregnated with polyurethane.
[0002]
[Prior art]
Artificial leather is roughly classified into two types: artificial leather with silver and suede-like artificial leather. As a base cloth for these artificial leathers, a nonwoven fabric impregnated with a polyurethane resin is generally used. When processing the base fabric for artificial leather, the base fabric is distorted due to various external forces such as tension and pressure, so a relaxation treatment for removing the distortion is required, and various treatment methods have been conventionally known. I have.
[0003]
Further, in order to increase the productivity of the relaxation treatment, there is also known a method in which a base cloth is passed through a heating liquid in a liquid tank while being transferred to continuously perform a massage relaxation treatment. For example, the continuous relaxing apparatus for fabric disclosed in Japanese Patent Publication No. 47-23697 is to reverse the rotor in the liquid tank alternately in the forward and reverse directions to impart a strong fir action to the fabric and relax the fabric.
[0004]
Further, in the method of treating a sheet-like material disclosed in Japanese Patent Application Laid-Open No. 7-268664, the sheet-like material is fed into an upstream portion of a processing liquid tank and temporarily stays in the tank, and then a transfer path above the tank is transported. The sheet-like material is transferred to the downstream portion of the tank via the above, and temporarily stays there, and a pair of water jet nozzles having a function of jetting in the forward direction and the opposite direction arranged in the transfer path are alternately operated during the transfer to form the sheet-like material. The processing liquid is repeatedly transported between the upstream portion and the downstream portion of the processing liquid tank, and then is transported outside the tank at a speed equal to or lower than the above-described feeding speed.
[0005]
Both of the above-mentioned conventional methods use the above-mentioned base cloth in the form of a rope, and fold this rope-shaped base cloth back and forth in the transport direction to cause a morphological change due to side wrinkles, and repeatedly transport the base cloth to form a part of the side wrinkles. Is moved without fixing, so as to exert a relaxing effect.
[0006]
[Problems to be solved by the invention]
However, in the above-described related art, there is a problem that a morphological change due to only vertical wrinkles is not sufficient, and a relaxing effect is not sufficiently exhibited. In other words, in the invention of Japanese Patent Publication No. 47-23697, the base cloth is rubbed by being turned upside down by a rotor, but since the processing is only performed in a liquid tank, the base cloth remains in a rope shape and does not spread. Since the portion does not change, vertical wrinkles remain in the base fabric for artificial leather and cannot be applied.
[0007]
In the invention of Japanese Patent Application Laid-Open No. Hei 7-26864, the base fabric is repeatedly transported, and the base fabric is put out into the air by a water jet. However, the power of the water jet is weak, and the base fabric is raised until the vertical wrinkles are sufficiently extended. I can't. On the other hand, if the power of the water jet is increased, the base cloth can be raised to a high level, but extra tension is applied to the base cloth once relaxed in the liquid tank. In addition, it is necessary to narrow the inside of the passage of the liquid tank, and there is a problem that the base cloth may be damaged on the inner wall of the passage.
[0008]
The present invention solves the above-mentioned problems, and produces an effective form change in the base fabric, thereby improving a relaxing effect, and a method and apparatus for relaxing a base fabric for artificial leather, which enables continuous relaxation processing. It is intended to provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to a method or an apparatus for relaxing a base fabric for artificial leather according to one configuration of the present invention, the fabric is continuously relaxed while transporting the base fabric for artificial leather in which a nonwoven fabric is impregnated with polyurethane. In order to perform the treatment, the treatment liquid is stored, and the base cloth is disposed by at least one roller having at least one bath having a substantially U-shaped passage when viewed from a side perpendicular to the transport direction of the base cloth. Slack and send it into the passage in the bathtub, then pull up the sent base fabric while pulling it up so that the wrinkle extends from the bathtub to the height of the air , and then pull the raised base fabric out of the bathtub A series of steps are repeated so as to fall into the passage and change the location of the vertical wrinkle .
According to the above configuration, the base cloth is slackened and sent into the passage in the bathtub, and then the base cloth is pulled up so as to extend the wrinkle from the bathtub to an aerial height such that vertical wrinkles are stretched while pulling the sent base cloth. Further, by dropping the raised base cloth into the passage of the bathtub and changing a portion of a vertical wrinkle, a series of steps are repeated, so that the base cloth is repeatedly sagged and stretched. Along with improving the relaxing effect, continuous relaxation processing becomes possible.
[0010]
That is, in order to effectively exert the relaxing effect of the base fabric for artificial leather, it is preferable to cause not only a morphological change due to horizontal wrinkles but also a morphological change due to rope-shaped vertical wrinkles. Since the polyurethane contained in the base cloth for artificial leather has a high rebound resilience, the base cloth spreads by raising the base cloth to an air height such that vertical wrinkles extend from the bath tub, so that when the cloth is sent again to the bath tub. The part of the rope-shaped vertical wrinkles changes. The horizontal wrinkles are changed by bending the rope-shaped base fabric back and forth in the transport direction and repeatedly transporting the same. When this series of operations is repeated, the relaxation effect is improved due to a morphological change caused by horizontal wrinkles and vertical wrinkles.
[0011]
Preferably, before the base fabric is sent into the bathtub, the base fabric is reciprocated in a transverse direction orthogonal to the transport direction, thereby folding the base fabric in the transport direction of the base fabric and stacking the fabric in the lateral direction. , Lead into the bathtub passage. Therefore, it is possible to prevent the rope-shaped base cloth from being entangled, and to reduce the stacking height in the bathtub to reduce the size of the apparatus.
[0012]
Preferably, the relaxer for artificial leather base cloth is arranged in series in the transport direction of the base cloth, stores the processing liquid, and has a substantially U-shaped passage when viewed from a side orthogonal to the transport direction of the base cloth. First and second tubs having:
A carry-in roller arranged above each of the bathtubs for feeding a base cloth to the first bathtub, a carry-out roller for pulling out the base cloth from the second bathtub, and a base cloth drawn out of the first bathtub to the second bathtub. A roller device having a reversing roller mechanism for performing forward rotation for feeding, and reverse rotation for pulling out the base cloth from the second bathtub and sending it to the first bathtub;
The first bath tub and the state of storage of the base cloth in the first bath tub are detected, and the rotation of the roller device is controlled to pull out the base cloth from the second bath tub and send the base cloth to the first bath tub with slack. And a second operation of pulling out the base fabric from the first bathtub and slackly sending it to the second bathtub.
According to the above configuration, the first operation of pulling out the base cloth from the second bath tub and slacking it into the first bath tub, and pulling out the base cloth from the first bath tub and slacking it into the second bath tub and sending it. By repeating the second operation, sagging and elongation are repeatedly generated in the base cloth, so that the relaxing effect can be improved and continuous relaxation processing can be performed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration of a relaxing device for a base cloth for artificial leather according to an embodiment of the present invention. This apparatus continuously relaxes a base fabric for artificial leather in which a non-woven fabric is impregnated with polyurethane while transporting the base fabric. The artificial leather base fabric referred to in the present invention includes all non-woven fabrics after being impregnated with polyurethane, the surface may be fuzzed, or the surface may be coated with a resin for a silver surface layer. Also includes those that have been applied.
[0014]
First, a pair of draw-in rollers 21 driven by a driving device (not shown) to draw in the base fabric 1 sent from the previous process are provided in front of the apparatus, a dancer roller 23 which moves up and down to keep the tension of the base fabric 1 constant, and An impregnation tank 22 is provided. The impregnating tank 22 includes a plurality of upper rollers 22a, a lower roller 22b, and a steam heater 22c that heats the pipe by passing steam. The processing liquid R heated by the steam heater 22c is supplied to the lower roller 22b. We store enough to soak. The base cloth 1 has a width of, for example, 1500 mm, and is alternately immersed and repeatedly squeezed by passing the treatment liquid R and the space between the upper roller 22a and the lower roller 22b alternately a plurality of times. State.
[0015]
On the downstream side, an inclined table 24 is provided via a pair of retraction rollers 25 and a first lifting roller 27. These rollers 25 and 27 are drive rollers connected to a drive (not shown). The inclined base 24 pools the base cloth 1 and conveys the base cloth 1 that is lifted up by the first lifting roller 27 and falls along the inclination thereof without giving tension thereto. The inclined table 24 sends the dropped base cloth 1 downward one after another along this inclination, so that the preceding base cloth 1 is on the succeeding lower side, and the base cloth 1 is prevented from being entangled one after another. I do.
[0016]
A traverse mechanism 26 is provided above the lower end of the inclined table 24, and a carry-in roller 12 described below is disposed above the traverse mechanism 26. Two first and second bathtubs 2A and 2B are arranged in series in the conveying direction G1 of the base cloth 1 in a substantially central portion of the apparatus on the downstream side of the carry-in roller 12. These first and second bathtubs 2A and 2B store the processing liquid R and have substantially U-shaped passages 3A and 3B when viewed from the side orthogonal to the transport direction G1 of the base cloth 1. .
[0017]
The traverse mechanism 26 has a ring 29 having a hole diameter sufficiently smaller than the base fabric width 1500 mm. The base fabric 1 having a width of 1500 mm passes through the ring 29 and is squeezed into a rope shape. The traverse mechanism 26 moves the ring 29 in the lateral direction perpendicular to the transport direction G1 (the direction perpendicular to the plane of FIG. 1), thereby moving the rope-like base cloth 1 passing therethrough in the lateral direction. . As shown in FIG. 2 (front view), the base cloth 1 is reciprocated in the horizontal direction H perpendicular to the conveyance direction by the lateral movement of the ring 29, and is moved in the conveyance direction of the base cloth 1 via the carry-in roller 12. While being folded and stacked in the horizontal direction H, it is guided into the passage 3A of the first bathtub 2A. In other words, the base cloth 1 is evenly stacked in the lateral direction H of the passage 3A of the first bathtub 2A to prevent the base cloth 1 from being entangled, and the stacking height in each of the bathtubs 2A and 2B is reduced to reduce the size of the apparatus. I do.
[0018]
A plurality of steam heaters 6 are provided in the vicinity of the passages 3A, 3B in the bathtubs 2A, 2B to keep the processing liquid R in the baths at a constant temperature (for example, 50 to 98 ° C, preferably 80 to 98 ° C). Heat to Also, hot water showers 7, 7 are disposed at the upper ends of the passages 3A, 3B, respectively, so that the heated treatment liquid R is applied to the outer peripheral surface of the rope-shaped base fabric 1 from the front and rear by the hot water showers 7, 7. By spraying, the entanglement preventing effect of the base fabric 1 is enhanced. Further, on the side walls of the bathtubs 2A and 2B, there are provided glass viewing windows 8 facing the passages 3A and 3B. By looking through the glass viewing windows 8, the entanglement of the base cloth 1 in the passages 3A and 3B is monitored. .
[0019]
The roller device 10 includes a carry-in roller 12, a carry-out roller 14, and a reversing roller mechanism 16. The carry-in roller 12 is disposed above the entrance side of the passage 3A of the first bathtub 2A, and slacks the base fabric 1 into the passage 3A of the first bathtub 2A by the rotation of the drive roller 12a. Thereby, the base fabric 1 is also folded back and forth in the transport direction G1 as shown in FIG. That is, the base fabric 1 is folded back and forth in the transport direction G1, and is evenly stacked in the lateral direction H by the traverse mechanism 26. The carry-out roller 14 is disposed above the outlet side of the passage 3B of the second bathtub 2B, and pulls the base fabric 1 from the second bathtub 2B into the air by pulling the base cloth 1 by the rotation of the drive roller 14a.
[0020]
The reversing roller mechanism 16 is disposed at a predetermined height above the outlet side of the passage 3 of the first bathtub 2A and the inlet side of the passageway 3 of the second bathtub 2B, and the front and rear rollers 16a, 16b, And three intermediate rollers 16c, which are free rollers disposed therebetween. The reversing roller mechanism 16 pulls the base cloth 1 in the transport direction G1 from the first bathtub 2A while pulling it up into the air and sending it to the second bathtub 2B, and rotates the base cloth 1 in the direction G2 opposite to the transport direction G1. The reverse rotation of pulling up from the second bathtub 2B into the air while pulling it and sending it to the first bathtub 2A is performed. The height position of the reversing roller mechanism 16 is such that the rope-shaped base cloth 1 in each of the bathtubs 2A and 2B is pulled up, and the rope-shaped base cloth 1 naturally spreads in the air due to its own repulsive elastic force. Is set to
[0021]
The reversing roller mechanism 16 drives the downstream roller 16b as a driving roller and the upstream roller 16a as a free roller when the base fabric 1 is conveyed in the conveying direction G1 by performing normal rotation, and performs reverse rotation. When the base fabric 1 is transported in the transport direction G1 and the reverse direction G2, the upstream roller 16a is driven as a driving roller, and the downstream roller 16b is driven as a free roller.
[0022]
The upper portions of the bathtubs 2A and 2B are covered by a casing C, in which the carry-in roller 12, the carry-out roller 14, the reversing roller mechanism 16 and the traverse mechanism 26 of the roller device 10 are housed. Steam generated from each of the bathtubs 2A and 2B is discharged from a steam discharge port 41 provided at an upper portion of the casing C by a fan (not shown).
[0023]
A water-cooled shower room 30 is provided downstream of the bathtub 2B, and the base fabric 1 carried out of the bathtub 2B by the carry-out roller 14 falls naturally and is sent to the water-cooled shower room 30. The water-cooled shower room 30 includes a transport conveyer 31 disposed at a lower portion thereof, and a water-cooled shower 32 and a centering device 33 disposed above the transport conveyer 31.
[0024]
The transport conveyor 31 pools the dropped fabric 1 and transports the fabric 1 without tension. The water-cooled shower 32 lowers the temperature of the base fabric 1 by bathing cold water during the transfer of the base fabric 1. As a result, the base fabric 1 is hardly stretched, and it is possible to cope with tension generated in a later step. The centering device 33 transports the base cloth 1 that has been lifted from above the conveyor 31 by a pair of pull-up rollers 34 serving as driving rollers and has been spread from the rope state by downstream devices 38 and 40, with its center line being conveyed. Perform centering so that it is almost at the center of the orbit.
[0025]
Downstream of the pulling roller 34, a dancer roller 35 and a guide roller 37 for keeping the tension of the pulled-up base fabric 1 constant are provided, and further downstream of the dancer roller 35 and the guide roller 37. , A well-known twist correcting device 36 that detects the twist of the base fabric 1 and corrects the twist according to the twist state, and a second lifting roller 38 that is a driving roller. Below that, a texter 40 is arranged. The textile 40 is a well-known device that expands the width of the base fabric 1 that naturally falls from the second lifting roller 38. The base fabric 1 is outwardly moved by a pair of threaded expander rolls 40a provided on both sides of the base fabric 1. Pull to spread. Thereafter, the base fabric 1 whose width has been increased is carried out to the next drying step by a pair of draw-out rollers 39.
[0026]
The control means 15 includes all drive rollers, namely, the pull-in rollers 21 and 25, the first lifting roller 27, the loading roller 12a, the unloading roller 14a, the rollers 16a and 16b, the lifting roller 34, the second lifting roller 38, and the twist correcting device. 36. The control means 15 first controls the rotation of the roller device 10, pulls out the base fabric 1 from the passage 3B of the second bathtub 2B, sags the base fabric 1 into the passage 3A of the first bathtub 2A, and moves the base fabric 1 in the transport direction. A first operation of feeding the folded base fabric 1 into the passage 3A of the first bathtub 2A, pulling up the base fabric 1 sent into the passage 3A of the first bathtub 2A, and further moving the raised base fabric 1 to the passage 3B of the second bathtub 2B. The second operation of slacking in and feeding in a state of being folded back and forth in the transport direction is repeated. In the second operation, the rotation timing in the transport direction and in the opposite direction is controlled.
[0027]
The control means 15 further controls the pull-in rollers 21 and 25, the first lifting roller 27, the drive roller 12a of the carry-in roller 12, and the drive roller 14a of the carry-out roller 14 at a relatively low first speed V1 at a reversing roller mechanism. The 16 rollers 16a and 16b are driven to rotate at a second speed V2 higher than the first speed.
[0028]
In this case, the storage state of the base cloth 1 inside the passage 3A of the first bathtub 2A and the passage 3B of the second bathtub 2B is determined by an optical sensor or an ultrasonic sensor arranged along the horizontal direction H in FIG. (For example, three T1 to T3). That is, it is detected by the sensors T1 to T3 whether or not the stacked base cloths 1 are present at the respective positions in the passages 3A and 3B, and the number of the sensors T1 to T3 that has detected the presence of the base cloths 1 At this time, the degree of storage of the base fabric 1 in each of the bathtubs 2A and 2B is detected, and when the storage in the first bathtub 2A is small and the storage in the second bathtub 2B is large, the first operation is started. , And vice versa, the second operation is started.
[0029]
Next, the operation of the present apparatus will be described.
In FIG. 1, for example, a dried base cloth 1 having a width of 1500 mm is first carried into an impregnation tank 22, and is alternately dipped and squeezed between the treatment liquid R and a plurality of rollers 22 a and 22 b to be in a wet state. . Next, it falls on the inclined table 24 through the pull-in roller 25 and the first lifting roller 27.
[0030]
The base cloth 1 is pooled without tension on the inclined table 24, and is squeezed into a rope shape by the ring 29 of the traverse mechanism 26 while being pulled up by the carry-in roller 12. At this time, the traverse mechanism 26 is moved in the lateral direction H (FIG. 2), and is stacked in the lateral direction H while being folded in the transport direction in the passage 3 of the bathtub 2A.
[0031]
Next, the rotation speed of each roller device 10 is controlled by the control means 15 according to the storage state of the base cloth 1 inside the passages 3A and 3b of each bathtub, and the first operation and the second operation are repeated. Then, the base fabric 1 is subjected to the relaxing process. FIG. 3 shows an example of the above repetitive operation.
[0032]
[At line start]
First, as shown in FIG. 3A, when each of the passages 3A and 3B is divided into an upstream part and a downstream part with respect to the center lines C1 and C2 in the transport direction G1, the first operation is performed by the preliminary operation of the apparatus. The base fabric 1 is fed into the upstream part of the passage 3A of the bathtub 2A and the downstream part of the passage 3B of the second bathtub 2B in a slack manner, and is folded in the front-back direction in the transport direction G1 to a certain amount. Are stagnant. In the present apparatus, the staying amount is always ensured even during the repetitive operation so that the tension is not applied to the base fabric 1 as much as possible. In the upstream part of the passage 3B of the second bathtub 2B, a certain amount of the base fabric 1 in the folded state to be repeated is retained.
[0033]
In this state, the carry-in roller 12 and the carry-out roller 14 rotate in the transport direction G1 at the first speed V1, and the reversing roller mechanism 16 reverses the transport direction G1 at the second speed V2 higher than the first speed V1. Rotate in the direction G2. Generally, the second operation time t2 for rotating the roller 16b in the forward direction is longer than the first operation time t1 for rotating the roller 16a of the reversing roller mechanism 16 in the reverse direction (t1 <t2).
[0034]
[After t1 hours from the start]
After the time t1, the base cloth 1 having the length of V2 × t1 among the base cloths 1 staying in the upstream portion in the passage 3B of the second bathtub 2B in FIG. By the reverse rotation of 16a, it is conveyed in the direction G2 opposite to the conveying direction G1 and is lifted into the air from the inside of the passage 3B of the second bathtub 2B, and then the passage of the first bathtub 2A as shown in FIG. It falls naturally into 3A. As a result, the base fabric 1 is once stretched, then sagged again and sent into the first bathtub 2A in a state of being folded back and forth in the transport direction G1. On the other hand, the new base cloth 1 is carried in by the carry-in roller 12 into the passage 3A of the first bathtub 2A by the length of V1 × t1. On the other hand, the relaxed base fabric 1 having the length of V1 × t1 is carried out from the downstream portion in the passage 3B of the second bathtub 2B by the carry-out roller 14. Thus, the first operation is performed.
[0035]
[After t1 + t2 hours from start]
FIG. 3C shows a state after t1 + t2 hours from the start, that is, a state further after t2 hours from the state of FIG. 3B. First, in FIG. 3B, after a time t1 from the start, the rotation direction and the rotation speed of the carry-in roller 12 and the carry-out roller 14 are not changed, and the rotation direction of the roller 16b of the reversing roller mechanism 16 is changed without changing the rotation speed. In other words, each is rotated forward in the transport direction G1. Therefore, after t2 hours from this state, the base cloth 1 having a length of V2 × t2 is conveyed in the conveying direction G1 and is lifted into the air from the downstream portion of the passage 3A of the first bathtub 2A. Here, since the first operation time t1 <the second operation time t2, the amount sent to the first bathtub 2A within the time period t1 + t2 is sent to the second bathtub 2B. Further, the pulled-up base fabric 1 having a length of V2 × t2 is naturally dropped into the passage 3B of the second bathtub 2B as shown in FIG. 3C. As a result, the base fabric 1 is once stretched, then sags again and fed in a state of being folded back and forth in the transport direction G1. Similarly, after a time t2 from the time t1, a new base cloth 1 is similarly carried into the passage 3A of the first bathtub 2A by the length of V1 × t2 by the carry-in roller 12, while being carried out by the carry-out roller 14. Then, the relaxed base fabric 1 having a length of V1 × t2 is carried out from the downstream portion in the passage 3B of the second bathtub 2B. Thus, the second operation is performed. As a result, the state shown in FIG. 3C is reached after the time t1 + t2 from the start, the state returns to the line start state shown in FIG. 3A, and this repetitive operation is repeated.
[0036]
Thereafter, the base fabric 1 carried out from the carry-out roller 14 is carried into the water-cooled shower room 30, and is cooled by the water-cooled shower 32 during the conveyance of the conveyor 31. At this time, the base fabric 1 is in a state of being spread from the rope state in the lateral direction. The base cloth 1 spread in the lateral direction is centered by the centering device 33, and the torsion is corrected by the torsion correcting device 36 while the tension is kept constant by the dancer roller 35. Next, the lateral width is widened by the texter 40 and carried out to the drying step.
[0037]
As described above, the present device performs a continuous relaxation process, and since the rebound resilience of the polyurethane contained in the artificial leather base fabric is high, the rope-shaped base fabric 1 is attached to each bathtub 2A, By repeating a repetitive operation of inverting between 2B and expanding the base cloth 1 sufficiently in the air a certain number of times, not only the horizontal wrinkle part but also the rope-shaped vertical wrinkle part is moved, and the base cloth 1 is moved. Since an effective form change is caused, the relaxing effect can be improved.
[0038]
Embodiment 1
A mixed spun fiber consisting of 50 parts of an island component made of polyamide and 50 parts of a sea component made of polyethylene is drawn in hot water at 56 ° C, mechanically crimped, cut into 51 mm raw cotton, defibrated with a card, and cross-wrapped. To produce a three-dimensional entangled nonwoven fabric by needle-punching the web with a 1 barb needle at a punch density of 1200 punches / cm ² . The obtained nonwoven fabric had a weight of 700 g / m ² and an apparent density of 0.20 g / cm ² .
This nonwoven fabric is immersed in hot water of 80 ° C. for 2 minutes, shrunk by 40% in area, dried by a hot air drier of 100 ° C., and further heated and pressed on a hot drum having a surface temperature of 145 ° C. with a metal net. Thus, an entangled nonwoven fabric having a smooth surface and an apparent density of 0.29 g / cm ² was obtained.
This non-woven fabric is impregnated with a dimethylformamide solution of a polyether-based polyurethane, and the polyurethane is coagulated in an aqueous solvent. Then, the sea component is removed in hot toluene (dimensional change during removal of the sea component, lengthwise + 15%, width). (−8% in the direction) and then dried to obtain a base fabric having a thickness of 1.33 mm, a weight of 458 g / m ² , and a density of 0.344 g / cm ² .
This base fabric was continuously subjected to a relaxation treatment under the following treatment conditions by the relaxation device shown in FIG.
(Processing conditions)
Transport speed of base cloth V1 10 m / min Temperature of bath tubs 2A and 2B 93 ° C
Inverted base cloth in bathtub 2A, 2B 300m
Inversion speed V2 100 m / min. Inversion frequency 10 times / 30 minutes. Thereafter, drying was performed to obtain a soft base cloth having a thickness of 1.38 mm, a weight of 508 g / m ² , and a density of 0.368 g / cm ² .
[0039]
【The invention's effect】
According to the present invention, a series of steps of sagging the base fabric and sending it into the bathtub passage, pulling up the sent base fabric into the air while pulling it, and further dropping the raised base fabric into the bathtub passageway. By repeating, sagging and elongation occur repeatedly in the base fabric, so that the relaxing effect of the base fabric can be improved and continuous relaxation processing can be performed.
[Brief description of the drawings]
FIG. 1 is a side view showing a relaxing device for a base cloth for artificial leather according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a traverse operation.
FIGS. 3A to 3C are side views showing a repetitive operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base cloth, 2A ... 1st bathtub, 2B ... 2nd bathtub, 3A ... 1st bathtub passage, 3B ... 2nd bathtub passage, 10 ... Roller device, 12 ... Loading roller, 14 ... Unloading Roller, 15: control means, 16: reversing roller mechanism, 26: traverse mechanism, G1: transport direction, H: lateral direction, R: processing liquid.

Claims (5)

In a method for relaxing an artificial leather base cloth that continuously performs a relaxation process while transporting an artificial leather base cloth in which a nonwoven fabric is impregnated with polyurethane,
A roller device that stores the processing liquid and is disposed above at least one bath having a substantially U-shaped passage when viewed from a side orthogonal to the transport direction of the base fabric,
The base cloth is slackened and sent into the passage of the bath tub, and then, while pulling the sent base cloth, the base cloth is pulled up from the bath tub so as to extend to the height of the air where vertical wrinkles are stretched , and further raised. A method of relaxing an artificial leather base fabric, wherein a series of steps are repeated so as to drop a slab into a passage in a bathtub and change a portion of a vertical wrinkle . 2. The base cloth according to claim 1, further comprising: reciprocating the base cloth in a transverse direction perpendicular to the transport direction before the base cloth is sent into the bathtub, thereby guiding the base cloth into a passage in the bathtub. A method of relaxing an artificial leather base cloth, wherein the base cloth for artificial leather is stacked in the horizontal direction while being folded in the transport direction of the artificial leather. In a relaxation device for an artificial leather base cloth that continuously performs a relaxation process while transporting an artificial leather base cloth in which a nonwoven fabric is impregnated with polyurethane,
At least one bath tub for storing a processing liquid and having a substantially U-shaped passage when viewed from a side orthogonal to the transport direction of the base fabric;
A roller device disposed above the bathtub;
By controlling the rotation of the roller device, the base cloth is slackened and sent into the passage of the bathtub, and then the base cloth is pulled to an air height such that vertical wrinkles extend from the bathtub while pulling the sent base cloth. A base for artificial leather, comprising control means for repeating a series of steps so as to raise the base cloth so as to spread it and drop the raised base cloth into the passage of the bathtub to change a vertical wrinkle site. Cloth relaxing device. In claim 3, furthermore, before the base cloth is sent into the bathtub, the base cloth is reciprocated in a transverse direction perpendicular to the transfer direction, thereby folding the base cloth in the transfer direction of the base cloth. A relaxing device for an artificial leather base fabric, comprising a traverse mechanism for guiding into a passage in a bathtub so as to pile up in a lateral direction. In claim 3,
First and second bathtubs are arranged in series in the transport direction of the base cloth,
The roller device includes a carry-in roller that feeds the base cloth into the first bathtub, a carry-out roller that pulls out the base cloth from the second bathtub, and a forward rotation that pulls the base cloth out of the first bathtub and feeds the base cloth into the second bathtub. A reverse roller mechanism that performs reverse rotation of pulling out the base cloth from the second bathtub and feeding the base cloth into the first bathtub,
The control means detects the state of storage of the base fabric in the first bathtub and the second bathtub, controls the rotation of the roller device, draws the base fabric from the second bathtub, and sags the first bathtub. A relaxing device for an artificial leather base fabric, characterized by repeating a first operation of feeding and feeding, and a second operation of pulling out a base fabric from a first bathtub and sagging and sending it to a second bathtub.

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