JP2008214801A - How to prevent fraying of textiles - Google Patents

Abstract

A method for preventing fraying of a fabric that can effectively prevent fraying of an ear when the fabric is cut is provided.
A fraying prevention method for preventing fraying from a cutting edge after cutting a woven fabric made of thermoplastic resin fibers, which is applied to a base cloth 1 along a preset cutting line C. A gap L1 having a predetermined dimension set in advance according to the dimension of the thickness reducing portion 1a to be formed is prepared, and a pressing force is applied to the base cloth 1 at a predetermined frequency while passing the base cloth 1 through the gap L1. Then, a thickness reduction portion 1a having a predetermined width is formed in the same direction as the cutting direction C of the base fabric 1, and the base fabric 1 is cut along the cutting line C by this thickness reduction portion 1a.
[Selection] Figure 1

Description

  TECHNICAL FIELD The present invention relates to a method for preventing fraying of an ear formed at a cutting edge when a fabric is cut, and particularly to a method for preventing fraying of an ear suitable for a thin fabric used for garment lining for men and women. .

Various methods have been proposed for preventing fraying of the ear when the fabric is cut.
For example, Patent Document 1 discloses a technique for simultaneously performing cutting and fraying prevention by fusing a fabric with a blade heated by a high-frequency induced current.
Further, for example, Patent Document 2 specifically relates to prevention of fraying of a fabric knitted fabric made of glass fiber, a method of cutting a fabric ear while melting and bonding using a laser beam, and a hot melt type adhesive as glass fiber. A method of cutting after applying to the ear of the woven fabric, cooling, a method of cutting a resin such as ethylene-vinyl acetate copolymer dissolved in an organic solvent, applying to the ear of the glass fiber woven fabric, drying, A method of applying a photocurable resin liquid, irradiating it with light, curing it, and cutting it is disclosed.
In addition, in Patent Document 3, a blended yarn or a blended yarn of a woven fiber and a binder fiber having a binder component having a melting point lower than that of the textile fiber is used as a warp, and the weft and the warp are fused with the binder component. Technology has been proposed.
Refer to registered utility model No. 3018138 (see summary description and figure 4 of the drawing) JP-A-8-260340 (see paragraphs 0004 to 0010 of the specification) JP-A-8-188938 (see summary description)

However, although the techniques described in Patent Documents 1 and 2 are suitable for relatively thick fabrics, they are suitable for thin fabrics where the thickness of the base fabric is less than 0.1 mm, such as trouser lining. In addition, there is a drawback in that it cannot be expected to prevent fraying too much. Further, in order to enhance the fraying prevention effect, for example, when the fusing temperature is increased in the technique described in Patent Document 1, a new problem arises that the edge of the ear becomes hard and the touch becomes worse. Furthermore, in the technique described in Patent Document 2, when the amount of the resin as the binder is increased, the edge of the ear becomes hard and the touch is deteriorated as described above, or the thickness of the ear is increased by the amount of the added resin. The problem arises that increases.
The technique described in Patent Document 3 has a problem that a woven fabric must be knitted using a plurality of types of yarns, which increases the cost and sometimes cannot provide a woven fabric having a desired function.

  The present invention has been made in view of the above problems, and is a method capable of effectively preventing fraying of an ear part when a fabric is cut, particularly as a lining for men's and women's clothes. The purpose of the present invention is to provide a method for preventing fraying of a woven fabric that can be implemented at a low cost with little change in the touch of the edge of the ear, and without increasing the thickness of the ear. To do.

In order to achieve the above object, the invention according to claim 1 is a fraying prevention method for preventing fraying from a cut edge after cutting a woven fabric made of thermoplastic resin fibers. A gap having a predetermined dimension set in advance according to the dimension of the thickness reduction portion to be formed on the base cloth is prepared along the set cutting line, and the base cloth is passed through the gap while passing the base cloth through the gap. A pressing force is applied to the base fabric at a predetermined frequency to form the thickness reduction portion having a predetermined width in the same direction as the cutting direction of the base fabric, and the base fabric is cut along the cutting line at the thickness reduction portion. As a way to do.
As long as the thickness reduction part can maintain its form, it may only deform the yarn constituting the base fabric. The yarn may be fused. Fusion of interlaced yarns can be performed by heat fusion with a heater or welder fusion by applying high frequency vibration.

As described in claim 3, the base fabric is preferably cut while fusing the cut surface of the yarn. In this method, since the cut surface of the yarn is fused, the fraying prevention effect can be further enhanced. For such fusion cutting, for example, a known technique such as heat cutting described in Patent Document 1 or the like, or welder cutting for cutting while applying high-frequency vibration can be used.
As another means for further improving the fraying prevention effect, as described in claim 4, while forming a hole in the thickness reducing portion, a plurality of yarns are fused on the inner peripheral surface of the hole. Also good.
The above-described hole may be a through hole or a bottomed non-through hole. It may also be a hollow hole.

  The present invention can be suitably applied to clothes lining. Since the garment lining is generally formed of thermoplastic resin fibers such as polyester, nylon, or acetate, in this case, as described in claim 5, the thickness of the thickness-reduced portion is the base fabric. It is good to set it within the range of 60% or more and 80% or less with respect to the cloth thickness. Specifically, as described in claim 6, for example, when the base fabric is a garment lining having a fabric thickness of 0.08 mm, the fabric thickness of the thickness reduction portion is 0.050 mm or more and 0.060 mm or less. The thickness reduction portion may be formed within a range. In this case, when the base fabric is knitted with polyester, the frequency and amplitude of the high-frequency vibration is the same as that used for cutting the base fabric for such clothes lining, using a commercially available vibration generator, The same frequency and amplitude as when cutting can be selected.

  In a specific implementation of the present invention, a thickness reduction portion forming means for forming the thickness reduction portion by pressing the base fabric in the feeding direction and a base fabric on which the thickness reduction portion is formed are preset. A cutter that cuts along the cutting line can be performed by a cutting device arranged before and after the feeding direction. By using this apparatus, as described in claim 7, after the thickness reducing portion forming means forms a thickness reducing portion of a predetermined fabric thickness on the base fabric, the base fabric is cut by the cutter. be able to.

According to the present invention, even if the ear portion is cut by the same method as the conventional method, fraying hardly occurs thereafter, and thus the touch of the edge of the ear portion is hardly changed. Further, since a binder such as a resin is not used, an increase in the thickness of the ear portion is not caused. In particular, a large fraying prevention effect can be obtained on a thin fabric, such as a lining for men's and women's clothing.
Further, by cutting the base fabric immediately after forming the reduced thickness portion, the reduced thickness portion can be formed and cut in one step, which can be carried out at a low cost.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view illustrating a procedure from forming a thickened portion reducing portion to a base cloth until cutting according to an embodiment of the method of the present invention.
In FIG. 1, it is assumed that the direction orthogonal to the paper surface is the feeding direction of the base fabric 1 and that the wefts of the base fabric 1 are cut at a predetermined cutting position together with the feeding of the base fabric 1.

As shown in FIG. 1A, the base fabric 1 is placed on the base 2. The base 2 has a table 2a having a base cloth placement surface in the same plane as the base cloth placement surface (surface on which the base cloth is placed) 21 of the base 2a, and is positioned above the table 2a. A rotatable pressing roller 3 is prepared.
The pressure roller 3 has a width S that is substantially the same as the width of the reduced thickness portion that is to be formed on the base fabric, and the table 2a has a width that is equal to or greater than the width S of the pressure roller 3. . For example, in the case of a polyester base cloth having a cloth thickness of 0.08 mm used for men's trouser lining, the dimension S may be about 1 cm.

Further, the pressing roller 3 is positioned and arranged at a position having a gap L1 between the pressing roller 3 and the base cloth placement surface of the base 2. The dimension of the gap L1 (represented by the same symbol L1 as the gap L1) corresponds to the thickness of the thickness reducing portion 1a to be formed on the base fabric 1. For example, when the thickness reduction part 1a with a cloth thickness of 0.06 mm is to be formed along the cutting line C on a polyester base cloth 1 with a cloth thickness of 0.08 mm, the dimension of the gap L1 is 0.06 mm. Set to.
The pressing roller 3 only needs to be able to maintain the gap L1 when passing through the base cloth 1, and may be fixed to a position that secures the gap L1 using a support member such as a bracket. The shaft may be pressed against a stopper positioned and fixed at a predetermined position by a cylinder or the like so that the position can be maintained.

Next, as shown in (b), the base fabric 1 is passed through the gap L1 between the pressing roller 3 and the table 2a. The feed direction of the base fabric 1 is a direction orthogonal to the paper surface as described above, but the cutting position C of the base fabric 1 passes through the substantially center of the pressing roller 3.
At this time, a vibration h1 having a predetermined frequency is applied to the base cloth 1 between the pressing roller 3 and the table 2a. This vibration h <b> 1 gives a “striking” to the base fabric 1. As long as “tapping” can be applied to the base cloth 1, the vibration h1 may be applied from the pressing roller 3 or from the table 2a. In addition, the vibration h1 may be applied from both the pressing roller 3 and the table 2a, but each vibration h1 in this case can effectively give the base cloth 1 a “hit”. The frequency phase should be shifted.

The frequency and amplitude of the vibration h1 depend on the knitting conditions of the base fabric 1 (weaving type, yarn material, weaving density, yarn diameter, fabric thickness, etc.) and the size of the reduced thickness portion 1a to be formed. Can be determined from experiments and experience.
If the vibration frequency is high even at the same amplitude, it can be expected that “striking” can be applied to the base fabric 1 at finer intervals, and the fraying prevention effect of the thickness-reduced portion is also enhanced. On the other hand, when the frequency is lowered, the interval at which the “hitting” is performed becomes wider, and the fraying prevention effect is lowered. Specifically, for example, when the base fabric 1 is for the above-described trouser lining, the same commercially available vibration generator as that used for cutting such a trouser lining base fabric is used. The same frequency and amplitude as at the time of cutting can be selected.

As shown in (c), the thickness reducing portion 1a is formed at the portion of the cutting position C by the "tapping" action by applying the high frequency vibration h1 to the base fabric 1 passing between the pressing roller 3 and the table 2a. Is formed.
The state of the yarn in the thickness reducing portion 1a will be described with reference to FIG.
FIG. 2 is a schematic cross-sectional view enlarging a part of the base fabric 1 on which the thickness reducing portion 1a is formed, and is a schematic diagram showing a state of the yarn.

As shown in FIG. 2 (a), the base fabric 1 described here is from a plain weave structure in which warps 1c and wefts 1d are alternately raised and lowered in a state before the thickness reduction portion 1a is formed. It is configured. The initial fabric thickness at this time is L2.
When a vibration h1 is applied to the base cloth 1 between the pressing roller 3 and the table 2, the warp action causes the warp 1c and the weft 1d to be deformed as shown in FIG. A reduced thickness portion 1a is formed. The cloth thickness L1 is the same as the dimension (L1) of the gap L1 between the pressing roller 3 and the table 2 (hereinafter referred to as cloth thickness L1).

  Although the cloth thickness L1 of the thickness reducing portion 1a depends on the knitting conditions of the base cloth 1, for example, in the base cloth 1 of 0.1 mm or less used for the trouser lining of men's clothing, the cloth thickness L2 of the base cloth 1 On the other hand, it is preferable to be within a range of approximately 60% to 80%. For example, in the base fabric 1 having a fabric thickness of 0.08 mm, the fabric thickness L1 is preferably in the range of 0.048 mm to 0.064 mm.

  In the case of (b), the warp 1c and the weft 1d are only deformed. However, as shown in (c), the warp 1c and the weft 1d are fused (the fused portion is denoted by reference numerals). 1e), the fraying can be made more difficult. The warp 1c and the weft 1d can be fused by heating the warp 1c and the weft 1d when forming the thickness reducing portion 1a or by applying a high-frequency vibration for the fusion.

Further, for example, as shown in (d), the punch 31 forms a through hole 1f from the front surface to the back surface of the base fabric 1, and melts the inner peripheral surface of the through hole 1f, so that the warp 1c and the weft 1d May be fused. The inner diameter of the through hole 1f may extend over the width of the plurality of warps 1c and wefts 1d. The melting of the inner peripheral surface of the through hole 1f by the punch 31 may be by heating or by application of high-frequency vibration.
FIG. 3 is a perspective view showing an example in which the punch 31 is formed on the pressing roller 3.
On the outer peripheral surface of the pressing roller 3 of this embodiment, a plurality of protruding punches 31 are formed in two rows in parallel at equal intervals over the entire periphery.
When the pressing roller 3 rotates while being pressed against the base cloth 1, the base cloth 1 is formed with a thickness reducing portion 1 a and through holes 1 f are formed according to the arrangement interval of the punches 31. In addition, the inner peripheral surface of the through hole 1f is melted by the high-frequency vibration applied to the base fabric 1, and the warp 1c and the weft 1d are fused.
The base cloth 1 is partially crushed in place of the through-hole 1f to form a bottomed embossed hole or a hollow hole, and the inner peripheral surface of the embossed hole or the hollow hole is melted. Also good.

The base fabric 1 on which the thickness reducing portion 1a is formed by the above procedure is placed on a cutting die 2b as shown in FIG. 1 (d). Since the cutting position C is located substantially at the center of the reduced thickness portion 1a, the base cloth 1 is cut by the cutter 4 along the cutting position C.
The cutter 4 cuts the base fabric 1 while applying high-frequency vibration h2. Therefore, the cut surface of the weft contacting the cutter 4 is melted and fused by the high frequency vibration h2. In addition, a well-known thing can be used as a technique which cut | disconnects the base fabric 1 with the cutter 4, providing the high frequency vibration h2.

The optimum amplitude and frequency of the high-frequency vibration h2 are determined by experiments or the like depending on the knitting conditions of the base fabric 1 and the like. For example, in the base fabric 1 made of polyester of 0.1 mm or less used for the above-described trouser lining, the same condition as the condition for forming the reduced thickness portion 1a is selected.
As shown in FIG. 1 (e), the cut surface 1b of the base fabric 1 (thickness reducing portion 1a) cut in this manner is fused with the cut surface of the weft. Fraying spreads inside starting from the cut surface of the cut weft, but the occurrence of fraying at the cut surface can be effectively prevented by such fusing, and even if fraying occurs at the cut surface, Expansion to the inside can be prevented by the thickness reducing portion 1a. That is, if the base fabric 1 is fused as in this embodiment, the fraying prevention effect of the base fabric can be enhanced.

FIG. 4 is a block diagram illustrating a schematic configuration according to an example of an apparatus for carrying out the method of the present invention.
As shown in the figure, this apparatus includes a base fabric roller 10 around which the base fabric 1 is wound, and a thickness reduction portion for forming a thickness reduction portion 1a on the base fabric 1 unwound from the base fabric roller 10. It has a forming unit A and a cutting unit B disposed downstream of the reduced thickness portion forming unit A.
These units A. The basic configuration of B is substantially the same, and one or a plurality of sets are provided in a direction orthogonal to the paper surface of FIG. And the one base fabric unwound from the base fabric roller 10 can be cut into two or three or more by the thickness reduction part 1a.

  The thickness reduction part forming unit A includes a table 2a on which the base cloth 1 is placed, a pressure roller 3 that forms the thickness reduction part 1a on the base cloth 1 together with the table 2a, and the pressure roller 3 as the base cloth roller 10. A motor 34 such as a pulse motor or a servo motor that rotates at a synchronized speed and the pressing roller 3 are urged toward the base cloth 1 and pressed against a stopper (not shown), and a gap between the pressing roller 3 and the table 2a is constant. A cylinder 33 maintained at (L1) and a vibration generator 32 for applying vibrations of a predetermined frequency and amplitude to the base fabric 1 via the table 2a. The cylinder 33 presses the base fabric 1 against the vibration of the vibration generator 32, and has a pressurizing force that can form the thickness reduction portion 1a having a desired thickness.

The cutting unit B also has a die 2b for placing the base cloth 1, a cutter 4 for cutting the base cloth 1 placed on the die 2b, and a cutter 4 at a rotational speed synchronized with the feed speed of the base cloth 1. A motor 44 such as a pulse motor or a servo motor that rotates, a cylinder 43 that urges the cutter 4 toward the die 2b, and a vibration generator 42 that applies vibrations of a predetermined frequency and amplitude to the base cloth 1 via the die 2b. And have. The cylinder 43 has a pressing force capable of holding the base cloth 1 against the vibration of the vibration generator 42 and cutting the base cloth 1 with the thickness reducing portion 1a.
In the apparatus of this embodiment, the vibration generator 32 and the vibration generator 42 are the same, and the base fabric 1 generates vibrations having the same frequency when the thickness reducing portion 1a is formed and when it is cut. To give to.

Reference numeral 5 denotes a controller that controls the driving of each part of the apparatus, and a detection signal is input from a sensor 12 that detects the rotation speed of the rotation shaft 11 of the base fabric roller 10 and is pressed at a rotation speed calculated from the detection signal. In order to rotate the roller 3 and the cutter 4, a speed command is output to the motor 3 and the motor 4.
Further, a command is output from the controller 5 to the vibration generators 32 and 42 so as to have a preset frequency.

In the apparatus having the above-described configuration, the base cloth 1 unwound from the base cloth roller 10 is fed in the direction indicated by the arrow I while being given a vibration having a predetermined frequency and amplitude by the thickness reducing portion forming unit A. 3 and the table 2a form a thickness reducing portion 1a.
And the base fabric 1 is cut | disconnected by the cutter 4 in the cutting unit B following this, giving the vibration of predetermined frequency and amplitude.
The cut base fabric 1 is wound up by a winding roller (not shown).

[Example]
Specific examples of the method of the present invention are described below.
In the following description, the fabric is described as being used for the lining of men's clothing pants.
1. Base fabric knitting conditions (1) Thread Thread material: Polyester Thread diameter: Warp 55 dtex (Decitex)
Weft 81dtex
(2) Weaving Weaving type: Plain weave Thread density: 112 warps / inch
83 wefts / inch
Fabric thickness of base fabric: L2 = 0.080mm
2. Formation condition of thickness reduction part (1) High-frequency vibration As a high-frequency vibration generator, EGG2808 manufactured by EVER GREEN ULTRASONIC CO., LTD. Of Taiwan was used.
The frequency is as follows.
Frequency: 28kHz (output 800W)
In the examples, warp and weft deformations were observed, but there was no fusion.
(2) Thickness reducing portion By changing the size of the gap between the pressing roller 3 and the table 2a, the width S = about 1 cm and the cloth thickness L1 = 0.070 mm, 0.060 mm, 0.050 mm, and 0.040 mm. The thickness reduction part of was formed.
3. Cutting conditions Cutting with a rotary cutter while applying high-frequency vibration. The same high frequency vibration generator as that described above was used, and the same frequency and amplitude as those used when forming the reduced thickness portion were used. The warp and the weft were fused on the cut surface.
Under the above conditions, a comprehensive evaluation was performed from the dimensions of the formed reduced thickness portion 1a, the resistance to fraying, and the strength of the fabric. The results are shown in the following table.

  From the above, in the polyester fabric thickness 0.08 mm used for the lining of the menswear trousers, the fabric thickness L1 of the thickness reducing portion 1a is 62.5% to the fabric thickness L2 of the fabric 1. It can be seen that good results can be obtained by setting the ratio within the range of 75%.

Although a preferred embodiment of the present invention has been described, the present invention is not limited to the above-described embodiment.
For example, although the above embodiment has been described on the assumption that wefts are cut, the present invention can also be applied to cutting warp yarns. Further, the present invention is not limited to the case where the base fabric is cut in a straight line shape, but can be applied to a case where the base fabric is cut into any shape such as a zigzag shape, a saw blade shape, a corrugated shape, and an indefinite shape.

Furthermore, the apparatus configuration for carrying out the method of the present invention is not limited to the above-described one. For example, when the thickness reducing portion 1a is formed by integrating the pressing roller 3 and the cutter 4, the base cloth 1 is cut almost simultaneously. You may comprise.
Further, the thickness reducing portion forming means may not be in the form of a roller like the pressing roller 3, but may be in the form of a plate, for example. Moreover, you may make it press a base fabric not only from one direction from upper direction but from both upper and lower directions. Further, the cutting means is not limited to the round blade-shaped cutter 4 as long as it can cut the base fabric, and may be a straight blade-shaped cutter.

  The present invention is effective in preventing fraying of all kinds of fabrics formed of thermoplastic resin fibers such as poloester, nylon, acetate, etc., but particularly for thin fabrics used for lining men's and women's clothing. Application is possible suitably.

It is the schematic explaining the procedure until it cut | disconnects after forming a thick part reduced part in a base fabric concerning one Embodiment of the method of this invention. It is the schematic sectional drawing which expanded a part of base fabric 1 in which a thickness reduction part is formed, and is a schematic diagram showing the state of a thread. It is a perspective view which shows an example which formed the punch in the press roller. It is a block diagram concerning an example of the apparatus for implementing the method of this invention, and explaining the schematic structure.

Explanation of symbols

1 Base fabric (woven fabric)
DESCRIPTION OF SYMBOLS 1a Thickness reduction part 1b Cut surface 1c Warp 1d Weft 1f Through hole 2 Base 2a Table 2b Die 3 Press roller 31 Punch 4 Cutter L1 Gap of base cloth (gap size and thickness of thickness reduction part)
L2 Fabric thickness h1 of the base fabric h1 Vibration applied to the base fabric when the thickness reduction part is formed h2 Vibration applied to the base fabric when cutting

Claims (7)

A fraying prevention method for preventing fraying from a cut edge after cutting a fabric made of thermoplastic resin fibers,
Along a preset cutting line, prepare a gap of a predetermined dimension set in advance according to the dimension of the thickness reduction portion to be formed on the base fabric,
While passing the base fabric through this gap, a pressing force is applied to the base fabric at a predetermined frequency to form the thickness reducing portion having a predetermined width in the same direction as the cutting direction of the base fabric,
Cutting the base fabric along the cutting line at the reduced thickness portion;
A method for preventing fraying of woven fabrics. The method for preventing fraying of a woven fabric according to claim 1, wherein a plurality of intersecting yarns are fused in the thickness reduction portion. The method for preventing fraying of a woven fabric according to claim 1 or 2, wherein the cutting is fusion cutting in which cutting surfaces of a plurality of yarns are fused. The method for preventing fraying of a woven fabric according to any one of claims 1 to 3, wherein a plurality of yarns are fused on the inner peripheral surface of the hole while forming a hole in the reduced thickness portion. When the thermoplastic resin fiber is polyester, nylon or acetate used for clothing lining, the thickness of the thickness-reduced portion is in the range of 60% to 80% with respect to the thickness of the base fabric. The method for preventing fraying of a woven fabric according to claim 1, wherein When the base fabric is a garment lining having a fabric thickness of 0.08 mm, the thickness reduction portion is formed within a range where the fabric thickness of the thickness reduction portion is 0.050 mm or more and 0.060 mm or less. The method for preventing fraying of a woven fabric according to claim 5. A thickness reducing portion forming means for pressing the base fabric in the feeding direction to form a thickness reducing portion; and a cutter for cutting the base fabric on which the thickness reducing portion is formed along a preset cutting line; Preparing a cutting device arranged before and after the feeding direction,
The said base cloth is cut | disconnected with the said cutter, after forming the thickness reduction part of predetermined cloth thickness in the said base cloth with the said thickness reduction part formation means, The said base cloth is characterized by the above-mentioned. How to prevent fraying of textiles.

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