JP6134170B2 - Elastic fabric - Google Patents

Description

  The present invention not only improves the stretchable fabric, more specifically, prevents width shrinkage at the time of stretching, but can further widen the width before stretching to increase the contact area and the covering area. In addition, the present invention relates to a stretchable fabric that can be applied to woven and knitted fabrics without any problem.

  As is well known, stretchable belt-like and tubular fabrics are widely used for shoulder straps, bandages, supporters and the like of bras that need to be in close contact with the body. However, in general stretch fabrics, when stretched in the length direction, the stitches are deformed vertically in the knitted fabric and the width is reduced. In general, the width is shrunk due to a large crimping phenomenon), and when used in a shoulder band, the wearer may bite into the body and feel uncomfortable.

  Therefore, conventionally, a technique for increasing the contact area by thickening the portion of the shoulder band that contacts the body has been proposed (see Patent Document 1). However, if the band is partially thickened, the design of the brassiere is impaired. In addition, since it is necessary to cut a continuously manufactured band at a specific position, the manufacturing efficiency also deteriorates.

  In addition, even when the stretchable fabric is used for a bandage or a supporter, if the width of the fabric is reduced when stretched, the area that can cover the affected area or joint becomes small, making it difficult to protect a wide range. On the other hand, when the width of the fabric is designed so as to increase the covering area, the bandage or supporter is easily bulky when stored or carried.

  Therefore, conventionally, a technique of inserting a monofilament yarn having a high elastic modulus in the width direction of the warp knitted fabric so that width shrinkage hardly occurs even when the stretchable fabric is stretched in the length direction (Patent Document 2). A technology has also been developed in which a plurality of elastic yarns aligned in the length direction are sandwiched between non-woven sheets on the front and back sides (see Patent Document 3).

  However, with regard to the above prior art, although it is possible to suppress the width shrinkage at the time of stretching in the stretchable fabric, the width of the fabric at the time of stretching cannot be increased more than before stretching. -Even if the covering area of a supporter etc. is large, it will be limited to the width | variety of the fabric before extending | stretching. Therefore, there is a limit to the improvement effect of the conventional technology.

  Moreover, since the width | variety of the fabric before and behind expansion / contraction does not change a lot with the said conventional stretchable fabric, the function (prevention and decoration) obtained by changing width cannot be expected. Furthermore, with respect to the structure of the stretchable fabric according to Document 3, it is necessary to use a non-woven sheet for the fabric, so that this structure cannot be applied to the fabric of the woven or knitted fabric as it is.

Japanese Utility Model Sho 62-162277 JP 2003-328255 A JP 2008-179128 A

  The present invention has been made in view of the above-mentioned problems, and its purpose is not only to prevent width shrinkage at the time of stretching, but also to further increase the width than before stretching to reduce the contact area and covering area. It is an object of the present invention to provide a stretchable fabric that can be increased, can be used for retaining and decorating, and can be applied to woven and knitted fabrics without any problem.

  Means employed by the present inventor for solving the above-described problems will be described with reference to the accompanying drawings.

That is, the present invention relates to a stretchable fabric comprising a strip-like fabric 1 that stretches in the length direction or a tubular fabric 2 that stretches in the circumferential direction.
Each bend forming a corrugated shape having a bent portion 11, 21 or a folded portion 13 with a cross section in the length direction or the circumferential direction provided at a predetermined pitch or continuously provided, and constituting the waveform The belt-like fabric 1 or the tubular fabric 2 was configured so that the portions 11 and 21 or the folding portion 13 had an oblique linear shape, a V shape, a zigzag shape, or a combination thereof in plan view.

  In addition, about the said strip | belt-shaped fabric 1 or the cylindrical fabric 2, the bending part 11 * 21 or the folding part 13 is formed so that it may expand 5% or more in the width direction in the state extended 50% in the length direction or the circumferential direction. Is preferred.

  Further, with respect to the belt-like fabric 1 or the tubular fabric 2, the width of the fabric when it is stretched efficiently by continuously forming the V-shaped bent portions 11 and 21 or the folded portion 13 in the shape of a herb in plan view. Can be increased.

  Still further, the belt-like fabric 1 or the tubular fabric 2 is a woven or knitted fabric including elastic yarns 12 and 22, and the bent portions 11 and 21 formed continuously on the fabric body are arranged in the length direction or the circumferential direction. By inserting the elastic yarns 12 and 22 so as to penetrate the elastic fabric, the stretchable fabric can be easily manufactured.

  When the elastic yarns 12 and 22 are inserted into the bent portions 11 and 21 continuously formed on the belt-like fabric 1 or the tubular fabric 2, the elastic yarns 12 are located near the center of the fabric body in the thickness direction. A structure in which 22 is inserted, or a structure in which the elastic yarns 12 and 22 are inserted so as to pass at least one of the bent portions 11 and 21 near the front side vertex or the back side vertex can be adopted.

  In addition, with respect to the belt-like fabric 1 or the tubular fabric 2, a double woven knitted fabric including elastic yarns 12 and 22 in at least one of the front and back two layers can be adopted. The bent portions 11 and 21 or the folded portion 13 are formed in the layer where 22 is not inserted. The elastic yarns 12 and 22 are preferably made of polyurethane fibers having excellent stretchability.

  Furthermore, in the belt-like fabric 1 or the tubular fabric 2, it is preferable to form the bent portions 11 and 21 or the folded portion 13 by heat setting processing or resin coating processing. Further, in the belt-like fabric 1 or the tubular fabric 2, it is preferable that the bent portions 11 and 21 or the folded portions 13 are provided at an equal pitch, and the pitch is 2 to 10 mm.

  In addition, the belt-like fabric 1 or the tubular fabric 2 can adopt an optimum form from a narrow tape shape, a string shape, a piping shape, or a lace shape.

  In the present invention, the stretchable fabric is provided with a folded portion or a bent portion in the length direction or the circumferential direction, and the folded portion or the bent portion has an oblique linear shape, a V shape, or a zigzag shape in plan view. Thus, when the fabric is extended in the length direction or the circumferential direction, the width of the fabric can be expanded according to the extension of the folded portion or the bent portion.

  Therefore, in the stretchable fabric of the present invention, not only can the problem of width shrinkage when stretched be solved, but the fabric area can be expanded by expanding the width when stretched. When used in a band, the contact area at the time of wearing can be increased to prevent biting into the body.

  In addition, when the stretchable fabric of the present invention is used for a bandage or a supporter, the covering area can be increased, so that an affected area wound with a bandage, a joint equipped with a supporter, or the like can be protected over a wide range. Moreover, if the form before expansion is narrowed, the bandage and supporter can be stored and carried in a compact form.

  Furthermore, since the stretchable fabric of the present invention can change the width of the fabric when stretched, when it is used as a rubber strap for training pants, wear, drawstring bags, etc., tension is applied in the through hole. By making the string thick, it can be made difficult to remove the string from the through hole. Moreover, the change of the width | variety at the time of expansion / contraction and the shape change of a folding part or bending can also be utilized for a decoration.

  Therefore, according to the present invention, when stretched in the length direction or the circumferential direction, the stretchability excellent in functionality that realizes the function of expanding the width of the fabric than before stretching and can be suitably used for clothing, bandages, supporters, etc. Since a fabric can be provided, the practical utility value is very high.

It is a perspective view showing the strip | belt-shaped fabric in Example 1 of this invention. It is a perspective view, a top view, and A-A 'sectional view for explaining a width expansion function at the time of extension of a beltlike fabric in Example 1 of the present invention. It is a perspective view showing the example of a change of the strip | belt-shaped cloth in Example 1 of this invention. It is a top view showing the example of a change of the strip | belt-shaped cloth in Example 1 of this invention. It is a top view showing the example of a change of the strip | belt-shaped cloth in Example 1 of this invention. It is a perspective view showing the cylindrical fabric in Example 2 of this invention. It is the top view showing the strip | belt-shaped fabric in the modification of this invention, and B-B 'end elevation.

“Example 1”
A first embodiment of the present invention will be described below with reference to FIGS. In the figure, what is indicated by reference numeral 1 is a belt-like fabric in which the fabric main body C is formed of a woven fabric structure having a narrow tape shape.

[Configuration of stretchable fabric]
In Example 1, a plurality of elastic yarns 12, 12 are inserted into a length of a fabric body C in which bent portions 11, 11,... Are continuously provided so that a cross section in the length direction forms a wave shape. A belt-like fabric 1 that expands and contracts in the direction is configured (see FIG. 1). In addition, the bent portions 11, 11,... Of the belt-like fabric 1 are formed continuously in a V-shaped bent portion 11, 11,.

  For the bent portions 11, 11,... Of the belt-like fabric 1, the elastic yarns 12 inserted in the length direction of the belt-like fabric 1 are crossed with the weft yarns at a predetermined interval, and these crossing portions are connected to each other. The elastic yarn 12 is attracted by the pulling force of the elastic yarn 12 to bend the long floating portion where the elastic yarn 12 and the weft yarn are not interlaced.

  And by having comprised the strip | belt-shaped fabric 1 as mentioned above, if the fabric main body C is extended in a length direction like Fig.2 (a)-(c), from the mountain fold part P and the valley fold part Q, Although the bent portions 11, 11... Extend, the shape of the belt-like fabric 1 in the width direction is the direction in which the crimp disappears from the large crimp state in the cross section A to A ′ shown in FIG. It becomes possible to enlarge the width of C. Therefore, it becomes possible to eliminate problems such as width shrinkage and increase the fabric area during stretching.

  Further, from the basic principle of the present invention, when the belt-like fabric 1 is extended in the length direction to extend the folded structure, rigidity in the weft direction is required to expand the belt-like fabric 1 in the width direction. . If the rigidity in the weft direction is small, even if the belt-like cloth 1 is stretched in the length direction, the weft thread meanders or the cloth becomes wrinkled, and the force that extends straight in the width direction does not work. The width of the belt-like fabric 1 cannot be increased.

  On the other hand, if the rigidity in the weft direction is excessively large, a strong pulling force is required to adopt the folded structure, so that the amount of elastic yarn used is increased and the cost is easily increased. Further, if the rigidity is excessively increased, there is a problem that the flexibility of the fabric itself is impaired and it is not suitable for clothing.

The stiffness in the weft direction of the belt-like fabric 1 is related to the tensile modulus of the weft yarn used, the fiber single yarn diameter, the fineness, the weft yarn density, and the like. In particular, the influence of the weft yarn fineness and the weft yarn weave density. Is large, and the value K represented by the following formula is preferably 50 to 5000 for the above reason. Ideally, the value K is more preferably 100 to 3000.

  In addition, the bent portions 11 of the belt-like fabric 1 can be provided at a predetermined pitch in the length direction with respect to the belt-like fabric 1, but the pitch of the bent portions 11, 11. In addition, it is desirable that the pitch is 2 to 10 mm.

  In addition, about the magnitude | size of the said pitch, since the smaller one becomes a fine waveform and it can reduce the apparent thickness of the strip-shaped fabric 1, it is preferable, but when the number of bends per unit length in the weft direction is too large, When extending in the length direction, the force expanding in the width direction becomes difficult to propagate and wrinkles are generated, and as a result, sufficient spreadability is not exhibited. Therefore, the size of the pitch is preferably 2 mm or more. On the other hand, if the pitch is increased too much, the waveform becomes linear and the spread in the width direction decreases. Therefore, the size of the pitch is preferably 10 mm or less.

  Of course, it is not always necessary to provide the bent portions 11, 11,... At an equal pitch, and the pitch size can be changed periodically or randomly. Furthermore, a folding structure may be partially provided in the length direction or the width direction so that only the width of the portion is expanded.

  Further, it is desirable that the belt-like fabric 1 is configured to be expanded 5% or more in the width direction when the fabric body C is stretched 50% in the length direction. As for this numerical value, in the width measurement method, since the expansion of the width is limited at the grip portions at both ends, both grip portions before stretching and after stretching by 50% so that the measurement length is at least 30 cm. The measured value is the width of the intermediate position.

  1 shows an example in which the elastic yarn 12 is inserted so as to pass near the front side of the fabric main body C, the elastic yarn 12 has a thickness of the fabric main body C as shown in FIGS. You may make it pass in any one of the vicinity of the center of a direction, the vicinity of the front side vertex of the bending part 11, and the back side vertex vicinity. Among these, the structure in which the elastic yarn 12 is disposed near the center of the fabric body C in the thickness direction is preferable because exposure of the elastic yarn 12 to the surface can be minimized.

  Further, the fabric body C is a double woven knitted fabric in which two layers of front and back fabrics are partially knotted, elastic yarn is inserted into one of the layers, and the knot points are obliquely linear, V-shaped, zigzag in plan view For example, the elastic yarn insertion side layer contracts to form the bent portion 11 or the folded portion in the opposite layer.

  Further, as the elastic yarn 12 used for the belt-like fabric 1, natural rubber, silicone yarn, polyurethane fiber, or the like can be used, and among them, the polyurethane fiber is abundant in types according to the thickness and application. Since there is also a colorable type, even if there is a slight exposure on the fabric surface, it becomes difficult to stand out. Further, the elastic yarn 12 is made of a covering yarn in which silicone yarn, polyurethane fiber or the like is used as a core, and a natural fiber or synthetic fiber yarn (usually used for clothing) is wound around the elastic yarn 12. It can also be used.

  In this embodiment, the bent portions 11, 11,... Of the belt-like fabric 1 are provided so as to form a V shape in plan view, but the shape of the bent portion 11 in plan view is V-shaped as shown in FIG. The zigzag shape that is connected in the transverse direction is repeated in the longitudinal direction to form a cedar shape, or as shown in FIG. 5, the fold-folded portion P and the valley-folded portion Q are alternately different from each other. It can also be combined.

  Further, the crease line that forms the oblique line, V shape, and zigzag shape in a plan view of the bent portions 11, 11... Of the belt-like fabric 1 is +30 to + 60 ° with respect to the longitudinal axis, or / and −. A 30 to -60 ° angle is preferred. As for the angle of the crease line, if it is + 30 ° or less, or -30 ° or more, the crease is oriented in the length direction, so the elongation in the width direction is large, but on the other hand, the elongation in the length direction is Since it is limited, the effect of widening is reduced.

  On the other hand, when the angle of the crease line is set to + 60 ° or more or -60 ° or less, the elongation in the width direction is reduced only by the increase in the length direction, so that the sufficient width expansion effect is obtained. I can't get it. For these reasons, the angle of the crease line is preferably +30 to + 60 °, and / or −30 to −60 ° with respect to the longitudinal axis of the belt-like fabric 1. Ideally, it is more preferably + 40 ° to + 50 ° or -40 ° to -50 °.

  In the present embodiment, a woven fabric is used for the belt-like fabric 1, but a knitted fabric can also be used for the belt-like fabric 1. For example, elastic yarns are arranged in the length direction by warp knitting, and in a plan view. By repeating the loop forming position as diagonally linear, V-shaped or zigzag with respect to the vertical insertion of the long floating portion, a folded structure having a widening effect can be formed.

  When a warp knitted fabric is used for the belt-like fabric 1, the normal knitting structure is flexible even if the warp knitted fabric is stretched in the length direction. Cannot be expanded. Therefore, by adopting a relatively high-stiffness thread material in the weft insertion structure and improving the width-direction rigidity of the belt-like fabric 1, it is possible to sufficiently transmit the spreading force in the width direction due to the extension in the length direction. .

Further, regarding the increase in rigidity due to the weft insertion structure, it is preferable that the yarn fineness and the insertion yarn density (course density) are greatly related to each other as in the case of the woven fabric, and the value K shown by the following equation is preferably 100 to 3000. Further, the value K is more preferably 200 to 2000.

  The “strip-shaped fabric” referred to in the present invention is a long fabric having a predetermined width, and includes a narrow-width tape-shaped fabric to a wide-width fabric. In addition, the example in which the elastic yarns are arranged in the longitudinal direction has been described. However, the elastic yarns are arranged in the width direction and stretched in the longitudinal direction by extending in the width direction. A stretchable fabric is also included.

“Example 2”
Next, a second embodiment of the present invention will be described with reference to FIG. In Example 2, the stretchable fabric is composed of a tubular fabric 2 that stretches in the circumferential direction. Further, the fabric body C of the tubular fabric 2 is continuously provided with bent portions 21, 21... Having a V shape in plan view so that the circumferential cross section thereof has a wave shape. The cylindrical fabric 2 is configured by inserting elastic yarns 22, 22... Into the fabric body C so as to penetrate the portions 21.

  In addition, about the said cylindrical fabric 2, it can manufacture with the double bag structure | tissue by a loom, a double Russell machine, or a circular knitting machine, and also the length direction of the strip | belt-shaped fabric 1 shown in Example 1 turns into the circumferential direction. Thus, it can also be set as the cylindrical fabric 2 by connecting edge parts.

  Thereby, if the cylindrical fabric 2 is extended in the circumferential direction, the width of the fabric main body C can be expanded more than before the expansion, and the area of the fabric can be increased, like the belt-like fabric 1 of the first embodiment. Therefore, about the cylindrical fabric 2 of a present Example, it can be used conveniently as a supporter etc.

“Example 3”
Next, Example 3 of the present invention will be described below. In Example 3, the folding portion 13 of the stretchable fabric 1 is formed by heat setting (not shown). Thereby, even if it is cloths, such as a nonwoven fabric, since a folding structure with elasticity can be given by forming a crease by heat setting processing, the width expansion effect can be exhibited by extension in the length direction. It becomes possible.

  In addition, the bending part without a fold can also be formed by the said heat setting process, and a folding part and a bending part can also be formed by a resin coating process instead of a heat setting process.

  In addition, for applications where the elastic power of the folded part or the bent part is insufficient only by the heat setting process or the resin coating process, it can also be used in combination with an elastic material. Further, the stretchable woven or knitted fabric using the elastic yarn is also subjected to the heat setting process or the resin coating process so that the crease becomes clear and the durability is improved.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the description of “Claims”. As shown in FIGS. 7A and 7B, the bent portions 11 and 21 formed on the 1 or the tubular fabric 2 can be formed as a folded portion 13 by bending the cross section in the width direction into a mountain shape. Further, the fabric body C may be a woven fabric or a knitted fabric containing elastic yarn.

  Further, a double woven knitted fabric in which elastic yarns 12 and 22 are contained in at least one of the front and back two layers is used in the belt-like fabric 1 or the tubular fabric 2, and the elastic yarns 12 and 22 are inserted. It is also possible to use a fabric body C in which the bent portions 11 and 21 or the folded portions 13 are formed in the layer.

  Moreover, about the form of the fabric main body C of the said strip | belt-shaped cloth 1 or the cylindrical cloth 2, not only a narrow tape shape but a string form, piping form, or a lace form is also employable. Also, regarding the function, it is possible to take in air and light by using the extension of the bent part and the folded part, or to make the string thicker by applying tension to make it difficult to escape from the through hole. Also belong to the technical scope of the present invention.

  In recent years, development of fiber materials having excellent functionality has been demanded in the market. Under such circumstances, the stretch fabric of the present invention has an unprecedented new function, such as inner and supporters, bandages, training pants and other strings, cuff members, belts, seat belts, neck straps, mesh structures (hammocks, etc.) Since it is a useful technology that can be widely used for airbags and the like, its industrial utility value is very high.

1 Banded fabric
11 Bend
12 Elastic yarn
13 Folding part 2 Tubular fabric
21 Bend
22 Elastic thread C Fabric body P Mountain folded part Q Valley folded part

Claims (11)

In a stretchable fabric comprising a strip-like fabric (1) that stretches in the length direction or a tubular fabric (2) that stretches in the circumferential direction,
The cross section in the length direction or the circumferential direction has a wave shape having a bent portion (11) (21) or a folded portion (13) provided at a predetermined pitch or continuously provided, and the waveform Each of the bent portions (11), (21) or the folded portion (13) constituting the belt-shaped fabric (1) or the cylindrical shape so as to form an oblique linear shape, a V shape, a zigzag shape or a combination thereof in a plan view. A stretchable fabric comprising the fabric (2).   The stretchable fabric according to claim 1, wherein the belt-like fabric (1) or the tubular fabric (2) is expanded by 5% or more in the width direction in a state where it is stretched by 50% in the length direction or the circumferential direction.   The belt-like fabric (1) or the tubular fabric (2) is characterized in that V-shaped bent portions (11), (21) or folded portions (13) are continuously formed in a cedar shape in a plan view. The stretchable fabric according to claim 1 or 2.   The belt-like fabric (1) or the tubular fabric (2) is a woven or knitted fabric containing elastic yarns (12) and (22), and the bent portion (11) (21) formed continuously from the fabric body (C). The elastic fabric according to any one of claims 1 to 3, wherein elastic yarns (12) and (22) are inserted so as to penetrate in a length direction or a circumferential direction.   With respect to the bent portions (11) and (21) continuously formed on the fabric body (C) of the belt-like fabric (1) or the tubular fabric (2), the elastic yarn (12 ) (22) is inserted, The stretchable fabric according to claim 4.   At least near the apex on the front side of the bent portions (11) and (21) with respect to the bent portions (11) and (21) formed continuously on the fabric body (C) of the belt-like fabric (1) or the tubular fabric (2) The stretchable fabric according to claim 4 or 5, wherein the elastic yarn (12) (22) is inserted so as to pass through one of the back side apexes.   The belt-like fabric (1) or the tubular fabric (2) is a double woven or knitted fabric containing elastic yarns (12) and (22) in at least one of the front and back two layers, and the elastic yarns (12) and (22) The stretchable fabric according to any one of claims 1 to 6, wherein a bent portion (11) (21) or a folded portion (13) is formed in the layer in which no is inserted.   The stretchable fabric according to any one of claims 4 to 7, wherein polyurethane fibers are used for the elastic yarns (12) and (22).   The belt-like fabric (1) or the tubular fabric (2), wherein the bent portion (11) (21) or the folded portion (13) is formed by heat setting or resin coating. The stretchable fabric according to any one of 8.   The belt-like fabric (1) or the tubular fabric (2) is provided with bent portions (11) (21) or folded portions (13) at an equal pitch, and the pitch is 2 to 10 mm. The stretchable fabric according to any one of claims 1 to 9.   The stretchable fabric according to any one of claims 1 to 10, characterized in that the strip fabric (1) or the tubular fabric (2) is in the form of a narrow tape, string, piping or lace. Fabric.

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