JP2014101619A - Bulky spun single yarn and fabric including bulky spun single yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a method for producing a bulky spun yarn having high resistance strength to rubbing on a surface of the spun yarn and having bulkiness while maintaining tensile strength of the spun yarn; the bulky spun yarn; a fabric formed of the bulky spun yarn; and an apparatus for producing the bulky spun yarn.SOLUTION: A method for producing a bulky spun yarn includes: a drawing step to form a bulky fiber bundle by drawing a staple fiber bundle with a plurality of drawing roller pairs to form a drawn fiber bundle, while simultaneously introducing a core yarn and the drawn fiber bundle to a roller pair of a downstream side of the plurality of drawing roller pairs to pass the drawn fiber bundle through the roller pair of the downstream side at a linear velocity faster than that of the core yarn; and an intertwisting step to apply twists to the bulky fiber bundle and the core yarn.

Description

  The present invention relates to a bulky spun yarn that is bulky, soft, and lightweight, a method for producing the same, and a fabric that includes the bulky spun yarn. More specifically, the present invention relates to a method for producing a bulky spun yarn using short-length fibers, a bulky spun yarn, a fabric including a bulky spun yarn, and a device for producing a bulky spun yarn.

  There is a demand for spun yarn having a bulky structure in order to obtain a lightweight, heat-retaining property, moisture-absorbing quick-drying property, or soft and comfortable clothing. For this reason, in the textile industry, many technologies have been developed through years of wisdom and ingenuity, and many distinctive products and manufacturing methods based on these technologies have been born. Bulky spun yarns such as cotton yarn and wool are easily broken or loosened simply by drawing single fibers in parallel. Therefore, in the spinning process, the yarn is twisted and the single fibers are bound to each other, so that the bulkiness is imparted while maintaining the strength of the yarn. The bulkiness tends to be a contradictory manufacturing condition.

  A typical method for producing a spun yarn having such a bulkiness is a sweet twisted yarn that is swelled and flexible with less twist applied to the yarn using natural fiber or chemical fiber staples. However, the sweet twisted yarn is not sufficiently bulky because it is simply twisted. Further, false twisted yarn is known as a filament bulky yarn, but this method is a method of twisting an untwisted filament in one direction and then returning it to its original untwisted state. When untwisted, there was a problem of loosening (a state where fibers are weakly entangled and misalignment occurs between fibers and the strength as a yarn cannot be obtained).

  In order to solve such problems, for example, various core yarns having a structure in which a filament of a synthetic fiber is used as a core yarn and the surface is covered with other fibers or yarns are provided. Further, in Patent Document 1, the staple yarn bundle is excessively supplied at a constant speed to the filament or spun yarn by the core yarn of the filament or spun yarn and the staple fiber bundle, and the filament or spun yarn becomes the core yarn. However, a method for producing a bulky spun yarn in which the core yarn is twisted so as to cover with a bulge has been proposed. With such a bulky spun yarn, the tensile strength can be supplemented with a filament or spun yarn of the core yarn, and the surface of the core yarn can be imparted with bulkiness and various coatings.

  In the method of Patent Document 1, as shown in FIG. 6, the core yarn 41 is passed through the hollow portion 44 of the top roller 45 of the second front roller pair (45, 46), and the drafted staple fiber bundle 42 is the top. In order to pass through the surface of the roller 45, the staple fiber bundles 42, which are fed out in parallel with each other and drawn to the core yarn 41 while being drawn, are twisted in such a form as to cover the surface of the core yarn. In this case, the entanglement between the core yarn 41 and the staple fiber bundle 42 is small, and the resistance to the squeak on the surface of the bulky spun yarn (the entanglement force between the surface of the core yarn and the staple fiber bundle) is weak, and the yarn shape tends to collapse. In particular, when a filament having a smooth surface is used for the core yarn, the resistance of the spun yarn to the stagnation is remarkably lowered and it cannot be put into practical use.

  Further, if the number of twists is increased to increase the yield strength of the yarn and maintain the collapse of the yarn shape, the bulkiness is lost. Further, in the manufacturing method of Patent Document 1, when the twist angle 47 of the core yarn 41 and the staple fiber bundle 42 sent out from the second front roller pair is decreased in order to improve the resistance of the bulky spun yarn to squeeze, The staple fiber bundle 42 dropped into the cut-out portion 44, and not only a sufficient bulkiness could not be obtained, but also there was a problem that sufficient quality was not obtained due to the generation of neps.

  As described above, it is difficult to produce bulky spun yarn having comprehensive properties such as yarn tensile strength, bulkiness, and resistance to swordfish in the conventional production method. For fibers, if a filament is used for the core yarn in order to increase the tensile strength, the yield strength of the spun yarn cannot be obtained, and if the spun yarn is used as the core yarn, there is a problem that the yarn becomes thick and excellent in bulkiness. The development of manufacturing technology for bulky spun yarns with swelled fine counts was desired.

JP-A-9-209226

  The present invention has been made in view of the above background, and the problem of the present invention is that even a spun yarn manufactured from a short fiber such as cotton or hemp has sufficient tensile strength. In addition, a method and an apparatus for producing a bulky spun yarn having a high yield strength against sprinkles on the surface of the spun yarn, having no yarn breakage, and having bulkiness, and a lightly formed product including the bulky spun yarn and the bulky spun yarn. Another object of the present invention is to provide a fabric having a soft touch and moisture absorption and quick drying.

Therefore, according to an aspect of the present invention, a bulky spun single yarn comprising a core yarn and a staple fiber bundle is provided. The bulky spun single yarn uses a plurality of pairs of rope drawing rollers to draft the staple fiber bundle to form a draft fiber bundle, while downstream of the plurality of rope drawing roller pairs. The core yarn and the drafted fiber bundle are simultaneously guided to the roller pair of the roller, and the tension is applied to the core yarn so that the drafted fiber bundle is fed at a linear velocity higher than the linear velocity of the core yarn. A bulky fiber bundle is formed by passing a pair, and the bulky fiber bundle and the core yarn are twisted. A plurality of independent grooves are formed in at least one roller of the roller pair. The staple fiber bundle is made of natural fibers. The length of the single fiber of the staple fiber bundle is 20 mm to 30 mm. Bulky spun single yarn twist multiplier of 4.5 to 6.5, and bulkiness is 8.0 cm ³ / g or more 13.0 cm ³ / g or less.

According to another aspect of the present invention, a bulky spun single yarn comprising a core yarn and a staple fiber bundle is provided. The bulky spun single yarn uses a plurality of pairs of rope drawing rollers to draft the staple fiber bundle to form a draft fiber bundle, while downstream of the plurality of rope drawing roller pairs. The core yarn and the drafted fiber bundle are simultaneously guided to the roller pair of the roller, and the tension is applied to the core yarn so that the drafted fiber bundle is fed at a linear velocity higher than the linear velocity of the core yarn. A bulky fiber bundle is formed by passing a pair, and the bulky fiber bundle and the core yarn are twisted. A plurality of independent grooves are formed in at least one roller of the roller pair. The staple fiber bundle is cotton fiber. Bulky spun single yarn twist multiplier of 4.5 to 6.5, and bulkiness is 8.0 cm ³ / g or more 13.0 cm ³ / g or less.

According to another aspect of the present invention, a bulky spun single yarn comprising a core yarn and a staple fiber bundle is provided. The bulky spun single yarn uses a plurality of pairs of rope drawing rollers to draft the staple fiber bundle to form a draft fiber bundle, while downstream of the plurality of rope drawing roller pairs. The core yarn and the drafted fiber bundle are simultaneously guided to the roller pair of the roller, and the tension is applied to the core yarn so that the drafted fiber bundle is fed at a linear velocity higher than the linear velocity of the core yarn. A bulky fiber bundle is formed by passing a pair, and the bulky fiber bundle and the core yarn are twisted. A plurality of independent grooves are formed in at least one roller of the roller pair. The staple fiber bundle is hemp fiber. Bulky spun single yarn twist multiplier of 4.5 to 6.5, and bulkiness is 8.0 cm ³ / g or more 13.0 cm ³ / g or less.

According to another aspect of the present invention, a bulky spun single yarn comprising a core yarn and a staple fiber bundle is provided. In the bulky spun single yarn, the staple fiber bundle is made of natural fibers. The length of the single fiber of the staple fiber bundle is 20 mm to 30 mm. Bulky spun single yarn twist multiplier of 4.5 to 6.5, and bulkiness is 8.0 cm ³ / g or more 13.0 cm ³ / g or less.

According to another aspect of the present invention, a bulky spun single yarn comprising a core yarn and a staple fiber bundle is provided. In the bulky spun single yarn, the staple fiber bundle is a cotton fiber. Bulky spun single yarn twist multiplier of 4.5 to 6.5, and bulkiness is 8.0 cm ³ / g or more 13.0 cm ³ / g or less.

According to another aspect of the present invention, a bulky spun single yarn comprising a core yarn and a staple fiber bundle is provided. In the bulky spun single yarn, the staple fiber bundle is hemp fiber. Bulky spun single yarn twist multiplier of 4.5 to 6.5, and bulkiness is 8.0 cm ³ / g or more 13.0 cm ³ / g or less.

  Preferably, the core yarn is a filament, a spun yarn or a combination yarn thereof.

  According to another aspect of the present invention, there is provided a fabric including any of the above bulky spun single yarn and a bulky spun yarn formed by twisting at least two bulky spun single yarns.

More specifically, if the twisting coefficient is in the range of 4.5 or more and 6.5 or less, the core yarn and draft natural fiber are intertwisted and easily entangled. It becomes bulky with sufficient yield strength. The twist coefficient described in the present invention is obtained by the following calculation formula.
K = T / √N
In the above formula, K: more coefficient, T: actual number of twists (twist number / inch), N: English cotton count. In the bulky spun yarn of the present invention, the bulkiness is inversely proportional to the twist coefficient, and the strength of the spun yarn against the squeak is proportional. That is, when the twist coefficient is 4.5 or less, the bulkiness is improved, but the proof strength is reduced, so the natural fiber on the surface of the core yarn is displaced during the processing of the woven fabric or knitted fabric, and the shape of the yarn Tends to collapse and become a problem. Further, when the twisting coefficient is 6.5 or more, although the property against squeak is improved, it is difficult to be bulky, and it is the same as a general spun yarn of the prior art, and it is difficult to obtain a bulky property.

  According to the method for producing a bulky spun yarn of the present invention, a bulky spun yarn having a fine yarn count and sufficient strength and resistance to stagnation is stably produced using a short fiber such as cotton fiber. be able to. In addition, a cloth comprising these bulky spun yarns can provide clothing that is light and soft to the touch and excellent in moisture absorption and quick drying.

It is a front view which shows the whole structure of the ring spinning apparatus which concerns on this Embodiment. FIG. 6 is a perspective view showing a state in which the staple fiber bundle S1 and the core yarn C according to the present embodiment pass through a front roller pair 25. FIG. 6 is a plan view showing a state in which the staple fiber bundle S1 and the core yarn C according to the present embodiment pass through the front roller pair 25, with the drafting mechanism 21 indicated by a dotted line. FIG. 6 is a plan view showing a state in which the staple fiber bundle S1 and the core yarn C according to the present embodiment pass through the front roller pair 25, with the tension mechanism 22 indicated by a dotted line. FIG. 9 is a plan view showing a state in which the staple fiber bundle S1 and the core yarn C according to a modified example pass through a front roller pair 25. It is the schematic which shows the aspect which passes a staple fiber bundle and a core thread through the separate places of a front roller pair. It is the schematic which shows the experiment for measuring the intensity | strength of the bulky spun yarn with respect to shigoki.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<Overall configuration of ring spinning device>
First, the overall configuration of a ring spinning device for realizing a bulky spun yarn manufacturing method will be described. FIG. 1 is a front view showing the overall configuration of the ring spinning apparatus according to the present embodiment. With reference to FIG. 1, the ring spinning device 20 mainly includes a drafting mechanism 21, a tension mechanism 22, and an intertwisting mechanism 24. Hereinafter, each mechanism will be described in detail. The drafting mechanism 21 according to the present embodiment includes a bulky mechanism 23.

(1) Drawing Mechanism The drafting mechanism 21 is mainly composed of a back roller pair 1, an apron 3, and a front roller pair 25. The apron 3 includes a middle roller pair 2. In the drafting mechanism 21, the rotational speeds of the back roller pair 1, the middle roller pair 2, and the front roller pair 25 (specifically, the circumferential speed or the speed of the yarn passing through the roller pair) are the back roller pair 1, the middle roller pair 2. The front roller pair 25 becomes faster in this order. In the drafting mechanism 21, the staple fiber bundle S supplied to the back roller pair 1 is drafted by this rotational speed difference (circumferential speed difference of each roller). The draft ratio by the back roller pair 1, the middle roller pair 2 (apron 3), and the front roller pair 25 is usually 8 to 60 times.

  Further, in the drafting mechanism 21, as in the drafting mechanism of the conventional ring spinning apparatus, the short fibers in the staple fiber bundle S are placed between the back roller pair 1 and the middle roller pair 2 and between the middle roller pair 2 and the front. The distance between the back roller pair 1 and the middle roller pair 2 and the distance between the middle roller pair 2 and the front roller pair 25 are the maximum of staple fibers so that they are not cut by the drafting force between the roller pair 25. It is set longer than the fiber length.

  The fibers constituting the staple fiber bundle and the core yarn used in the present embodiment are at least one fiber selected from the group consisting of natural cellulosic fibers, regenerated fibers, protein fibers, polyamide fibers, and thermoplastic fibers. However, the fibers used in the present embodiment are not particularly limited, and natural cellulosic fibers such as cotton and hemp, regenerated fibers such as rayon, polynosic, cupra, high-strength regenerated cellulose fibers, and protein fibers include acetate and the like. Examples of thermoplastic fibers such as semi-synthetic fibers, silk, and wool include polyamide fibers such as nylon, polyester fibers, and the like, and these can be used alone or in combination of two or more.

(2) Bulkiness Mechanism FIG. 2 is a perspective view showing a state in which the staple fiber bundle S1 and the core yarn C according to the present embodiment pass through the front roller pair 25. FIG. 3 is a plan view showing a state in which the staple fiber bundle S1 and the core yarn C according to the present embodiment pass through the front roller pair 25, with the drafting mechanism 21 shown by a dotted line. FIG. 4 is a plan view showing a state where the staple fiber bundle S1 and the core yarn C according to the present embodiment pass through the front roller pair 25, with the tension mechanism 22 indicated by a dotted line.

  2 to 4, the bulky mechanism 23 supplies the core yarn C to the center of the front roller pair 25 and the staple fiber bundle S1. The front roller pair 25 includes a top roller 5 and a base roller 4. A plurality of independent grooves 13 are formed on at least one surface of the top roller 5 and the base roller 4. In the present embodiment, a plurality of independent grooves 13 are formed on the circumferential surface of the top roller 5.

  As shown in FIGS. 1 to 4, in the bulky spun yarn manufacturing method according to the present embodiment, draft drawn by a drafting mechanism 21 including a back roller 1, an apron 3, and a front roller pair 25. The fiber bundle S1 and the core yarn C applied with a certain tension by the tension mechanism 22 are simultaneously guided to the front roller pair 25.

  More specifically, the draft fiber bundle S1 and the core yarn C pass through substantially the same position of the front roller pair 25 in an overlapped state. In other words, the draft fiber bundle S1 and the core yarn C pass through the independent groove 13.

  In the present embodiment, since the linear velocity of the core yarn C is reduced by the tension mechanism 22, the core yarn that passes through the front roller pair 25 rather than the linear velocity of the draft fiber bundle S1 that passes through the front roller pair 25. The linear velocity of C becomes slower. However, the linear velocity of the core yarn C passing through the front roller pair 25 may be decreased by means other than the tension mechanism 22 as compared with the draft fiber bundle S1.

  The draft fiber bundle S1 fed out from the front roller pair 25 earlier than the core yarn C and excessive at the outlet of the front roller pair 25 is twisted while generating bulkiness around the core yarn. In this way, bulky spun yarn is generated. That is, the draft fiber bundle S1 is sent out based on the rotational peripheral speed of the front roller pair 25, but the one core yarn C is sent behind the peripheral speed of the front roller pair 25 by a predetermined tension. As a result, a linear velocity difference is generated between the core yarn C and the draft fiber bundle S1 at the exit of the front roller pair 25, and these are twisted to obtain a bulky spun yarn.

  Thus, in order to produce a bulky spun yarn, it is preferable to send the draft fiber bundle S1 from the front roller pair 25 earlier than the core yarn C. When this condition is not satisfied and the draft fiber bundle S1 and the core yarn C are sent out from the front roller pair 25 at the same linear velocity, it is difficult to obtain bulkiness.

  Then, by adopting a configuration in which the core yarn C does not slip in the tension mechanism 22 and a plurality of independent grooves 13 are formed in at least one of the front roller pair 25, the core yarn C of the front roller pair 25 rotates. The gripping state and the releasing state are repeated substantially periodically. Specifically, the tension of the core yarn C between the front roller pair 25 and the tension mechanism 22 increases while the core yarn C passes through a place where the independent groove 13 is not formed (gripping state). On the other hand, the tension of the core yarn C between the front roller pair 25 and the tension mechanism 22 is released while the core yarn C passes through the place where the independent groove 13 is formed (released state). During this time, the speed of the core yarn C passing through the front roller pair 25 is also easily reduced. As a result, the core yarn C is hardly cut between the front roller pair 25 and the tension mechanism 22.

  For reference, in the case of the front roller pair in which the independent groove 13 is not formed, the core yarn C and the draft fiber bundle S1 are simultaneously sent out by the rotational force without the front roller being interrupted. Therefore, as long as the core yarn C does not slip at the nip portion of the front roller pair 25 or the nip portion of the chin roller pair 9 and the weight roller 8, the core yarn breakage easily occurs.

  Note that the tension applied to the core yarn C may be released by means other than the independent groove 13 of the front roller pair 25. For example, the core yarn C slips on the surface of the front roller pair 25 when a predetermined tension is applied, or the roller 8 of the tension mechanism 22 when a predetermined tension is applied or at a predetermined interval (intermittently). , 9 may be configured to increase the rotational speed.

  In the ring spinning device 20 according to the present embodiment, the independent groove 13 is provided on the circumference of the top roller 5 of the front roller pair 25. Therefore, by passing the core yarn C through the independent groove 13, a predetermined value is obtained. A slip corresponding to the tension can be intentionally generated. As a result, the tension applied to the core yarn C is relaxed and the core yarn C is hardly cut.

  That is, by passing the core yarn C through the portion of the independent groove 13 of the top roller 5, a state in which the core yarn C is not gripped at the nip portion between the top roller 5 and the base roller 4 occurs, and the tension applied to the core yarn C is increased. Will be relaxed momentarily. Thus, by forming the independent groove 13 on the circumference (surface) of the top roller 5, the gripping and releasing of the core yarn C are repeated substantially periodically as the front roller pair 25 rotates, and the core yarn C Is difficult to cut.

  Here, FIG. 5 is a plan view showing a state in which the staple fiber bundle S1 and the core yarn C according to the modified example pass through the front roller pair 25. FIG. With reference to FIG. 5, the bulky mechanism 23 may have a collector 30. That is, the core yarn C is supplied by the collector 30 to the center of the front roller pair 25 and the center of the staple fiber bundle S1.

(3) Core Yarn Tension Mechanism In the tension mechanism 22, the core yarn C is supplied from the core yarn bobbin 12 to the tension mechanism 22. The core yarn C is guided to the front roller pair 25 while a predetermined tension is applied by the chin roller pair 9 and the weight roller 8.

  The peripheral speed of the front roller pair 25 according to the present embodiment is set to 1.1 to 2.0 times the linear speed of the core yarn C. That is, the tension mechanism 22 sets the linear velocity of the core yarn C supplied to the front roller pair 25 to ½ times or more and 1 / 1.1 times or less of the peripheral velocity of the front roller pair 25.

  Here, the tension applied to the core yarn C is determined by the peripheral speed difference between the chin roller pair 9 and the front roller pair 25. That is, as described above, in producing a bulky spun yarn, it is necessary to make the peripheral speed of the front roller pair 25 faster than the peripheral speed of the chin roller pair 9.

  More specifically, the peripheral speed of the front roller pair 25 is preferably 1.1 to 2.0 times the peripheral speed of the core yarn C, and is in the range of 1.2 to 1.6 times. More preferably. As the peripheral speed of the front roller pair 25 is increased, the linear speed difference between the core yarn C and the draft fiber bundle S1 fed from the front roller pair 25 increases, and the bulkiness can be improved.

  However, when an intense tension is applied to the core yarn C, the core yarn C is easily cut. At the same time, since the draft fiber bundle S1 is sent out excessively, bulky unevenness tends to occur and the appearance is deteriorated. Moreover, the proof strength with respect to a mushroom falls. On the other hand, if the peripheral speed of the front roller pair 25 is lowered to 1.1 times or less of the linear speed of the core yarn, the bulkiness is reduced and a spun yarn having sufficient bulkiness cannot be manufactured.

  In this way, the tension applied to the core yarn C changes depending on the spun yarn to be manufactured, and the core yarn material and composition also change. In addition, it affects the bulkiness, appearance characteristics, and workability. It is preferable to select and set the linear velocity of the core yarn.

  Here, in the tension mechanism 22, it is necessary to reliably prevent the core yarn C from slipping by the weight roller 8 that is driven to rotate by the rotational force of the chin roller pair 9. The slip of the core yarn C in the tension mechanism breaks the balance between the linear velocity of the core yarn C fed from the front roller pair 25 and the draft fiber bundle S1, and unevenness occurs in bulkiness.

  Further, the core yarn C is supplied from the top roller 5 side along the row of independent grooves 13 formed on the surface of the top roller 5, and is fed to the center portion of the draft fiber bundle S1 flowing on the base roller 4 side. It is preferable to supply. 2 to 4, the core yarn C and the draft fiber bundle S1 are guided to the same portion of the front roller pair 25 and have different linear velocities (the draft fiber bundle S1 is sent out earlier than the core yarn C). Then, it is fed out from the same center in the front roller pair 25.

  Immediately after that, the draft fiber bundle S1 and the core yarn C are twisted by the rotational force of the spindle 7, so that the excessively fed draft fiber bundle S forms a bulky bulge and a core. It is possible to produce a bulky spun yarn having many tanglings between the yarn C and the drafted fiber bundle S1 and having a high resistance against swordfish.

  Here, the independent grooves 13 are dotted in at least one row along the circumferential direction of at least one roller of the front roller pair 25. The independent grooves 13 are preferably scattered over the entire surface of the top roller 5 of the front roller pair 25. The independent grooves 13 are provided at equal intervals along the circumferential direction of at least one roller of the front roller pair 25. Furthermore, it is preferable that the independent grooves 13 are scattered in a staggered manner on the surface of the top roller 5 as shown in FIG. This is because in the flow of the core yarn passing through the surface of the top roller 5, the gripping and releasing can be reliably performed with respect to the shift and movement of the core yarn.

  A predetermined tension is applied to the core yarn C by the tension mechanism 22. On the other hand, the core yarn C is gripped at the nip portion through which the non-groove portion 14 on the surface of the top roller 5 passes. As a result, the tension that is stretched in the core yarn C is generated by the tension mechanism 22 and the non-groove portion 14 of the bulky mechanism 23. On the other hand, in the nip portion (independent groove 13) through which the independent groove 13 passes, the tension of the core yarn C by the tension mechanism 22 and the bulky mechanism 23 is released.

  As described above, since the plurality of independent grooves 13 are present, the core yarn C is continuously gripped and released, and at the same time, the core yarn is expanded and contracted. Therefore, the tension applied to the core yarn C is substantially periodic. Tension and relaxation can be controlled to an appropriate strength.

  As the shape of the top roller 5, it is preferable to use one having a diameter of about 28 mm to 60 mm and a width of about 25 mm to 50 mm. Moreover, in order to hold | grip a short fiber reliably, it is preferable to be covered with the rubber elastic body. The hardness of the rubber elastic body is preferably in the range of 60 to 80 degrees, more preferably in the range of 65 to 75 degrees in terms of durability and gripping force. The base roller 4 of the front roller pair 25 is preferably made of metal. Moreover, it is preferable to make it a fluided structure in order to hold | grip a fiber reliably.

  The independent groove 13 has at least one shape selected from the group consisting of a rectangle, a rounded rectangle, an ellipse, a circular trapezoid, a square, and a triangle when viewed along the radial direction of the roller. Among these, it is more preferable that a long rectangular independent groove is formed along the circumferential direction of the roller. Moreover, the dimension of the independent groove | channel 13 is not specifically limited, It can design freely by the characteristic of the shape of a core yarn, and the required bulky spun yarn. Usually, the width can be designed within a range of 1 mm to 10 mm, a circumferential length of 3 mm to 10 mm, and a depth of 1 mm to 3 mm. When the independent groove 13 has such a shape, a portion (non-groove portion 14) that reliably grips the core yarn C by the front roller pair 25 and a portion that does not grip (independent groove 13) are substantially periodic by the rotation of the top roller 5. The tension of the core yarn C is imparted with tension and relaxation, the breakage of the core yarn C can be prevented, the speed fed from the front roller pair 25 can be controlled, and the bulky spun yarn can be produced efficiently. Because you can.

  In the present embodiment, the core yarn C is a filament, a spun yarn or a combination yarn thereof. The filament of synthetic fiber is preferably a filament made of polyester, nylon, acrylic, polyamide, or the like. It is preferable to use several filaments or several tens of filaments in a bundle. This is because the proof strength of the bulky spun yarn is improved. Further, the fineness of the filament is not limited, and an optimum one can be selected according to the count of the bulky spun yarn. As an example, a 30 denier filament is preferable when the wool count is 1/60, and a 50 denier filament is preferable for the 1/40 count, and a 110 denier filament is preferable for the bulky spun yarn of 1/20 or 1/13. The configuration of the core yarn C can be properly used according to the yarn count of the target bulky spun yarn.

  In the present embodiment, the staple fiber bundle S1 is a natural fiber. The staple fiber bundle S1 is a cotton fiber. Alternatively, the staple fiber bundle S1 is hemp fiber. In general, natural fibers have a short single fiber length, and it is difficult to produce a bulky spun yarn. However, according to the manufacturing method according to the present embodiment, the length of a single fiber such as a cotton fiber is short. Even if it is a thing of 20-30 mm, bulkiness can be provided and the fabric provided with new characteristics, such as weight reduction and the touch property, can be provided.

(4) Interlacing mechanism In the intertwisting mechanism 24, a bulky spun yarn is manufactured by the spindle 7 intertwisting the core yarn C sent from the bulky mechanism 23 and the draft fiber bundle S1. In the bulky mechanism 23, the core yarn C and the draft fiber bundle S1 are simultaneously fed from the same location at different linear velocities from the front roller pair 25. Therefore, the core yarn C and draft fiber bundle S1 are twisted along the same axis as the core yarn C, and the excessively supplied draft fiber bundle S1 is wound around the core yarn C. As a result, it is possible to produce a bulky spun yarn excellent in yield strength against swordfish at the same time as exhibiting bulkiness.

  A bulky spun yarn produced by the ring spinning device 20 can be made of a single yarn. However, the ring spinning device 20 preferably twists two or more single yarns. When twisting single yarns of bulky spun yarn, twisting in the direction opposite to the twisting direction of the single yarn is preferable because the bulkiness can be further improved. In the case of twisting in the reverse direction, two or more single yarns twisted in the Z direction are twisted in the S direction, so that the single yarn is twisted so as to return (untwist). Bulkiness will be improved. Moreover, the tensile strength and the proof strength against a scab can also be improved by twisting together two or more.

  Next, the bulky spun yarn according to the present embodiment can produce a bulky yarn even when a short-length fiber is used. In addition, since there is strength against swordfish, there is little collapse of the thread shape. Therefore, it can be processed into various fabrics (woven fabric, knitted fabric, nonwoven fabric, etc.) as apparel products.

  As described above, in the method for producing a bulky spun yarn according to the present embodiment, the linear velocity of the core yarn C passing through the front roller pair 25 is made slower than the linear velocity of the staple fiber bundle S1, so the front roller pair 25 is When passing, the staple fiber bundle S1 is abundantly supplied around the core yarn C. In addition, since the plurality of independent grooves 13 are formed on the surface of the front roller pair 25, the portion of the staple fiber bundle S1 that has passed through the independent groove 13 (the portion that has passed through the front roller pair 25 at a relatively low speed) From the rear, a portion of the staple fiber bundle S1 that has passed through the non-groove portion 14 (a portion that has passed through the front roller pair 25 at a relatively high speed) overlaps. Further, since the plurality of independent grooves 13 are formed on the surface of the front roller pair 25, the front roller pair 25 and the tension mechanism 22 (the peripheral speed is slower than the front roller pair 25) when the core yarn C passes through the non-groove portion 14. The tension of the core yarn C that is increased by the above can be released when the core yarn C passes through the independent groove 13. As a result, a bulky spun yarn capable of producing an apparel product having a light and soft touch, heat retention and sufficient tensile strength can be obtained.

  Hereinafter, the method for producing a bulky spun yarn according to the present embodiment will be described in more detail using examples.

  1 uses a staple fiber bundle (average fiber length 30 mm, 200 gr / 30 Yard) of 100% cotton and nylon filament (NY110D-24-205) fineness of 110 denier as a core yarn. Thus, a bulky spun yarn having a cotton yarn count of 8/1 was produced.

  In this embodiment, the shape of the independent groove 13 provided in the top roller 5 is a rectangle, and the size is 3 mm in length, 2 mm in width, and 3 mm in depth. Then, 57 independent grooves 13 having such a shape are provided in three rows so that the positions of the individual grooves are staggered (as shown in FIG. 2) at equal intervals in the circumferential direction of the top roller 5. The peripheral length of the top roller 5 was 157.0 mm (φ50).

In this embodiment, the peripheral speed ratio between the chin roller pair 9 and the front roller pair 25 is set so that the peripheral speed of the front roller pair 25 is 1.36 times the linear speed of the core yarn C. The nip pressure of the front roller pair 25 was set to 10 kg / cm ² .

  When the tension of the core yarn was measured during the production of the bulky spun yarn of this example, it showed periodic runout in the range of 20 g to 27 g. It was confirmed that the tension fluctuation was minimized when the core yarn passed through the independent groove 13 on the surface of the top roller 5 and maximized when passing through the non-groove portion 14. The tension was measured using a tensiometer AN type (manufactured by Chuasa Co., Ltd.).

In the present example, the drafting rate (draft rate) in the drafting mechanism 21 was 11.0 times. The rotation direction of the spindle 7 was set to the Z direction, and the number of twists was set to 11.5 times / inch. The traveler ring used was a traveler No. 11 (KANAI type O) having a diameter of 55 mm. As a result of measuring the properties of the bulky spun yarn produced in this example, the bulkiness was 9.0 cm ³ / g, the tensile strength was 10.2 N, and the elongation was 37%. Moreover, in the present Example, the result of having measured the actual twist number with the test | inspection twisting machine was 15.5 times / inch, and the twist coefficient was 5.48. Incidentally, as also shown in the examples below, the twist factor 4.5 to 6.5, it is preferred that the bulkiness is not more than 8.0 cm ³ / g or more 13.0 cm ³ / g.

  In the bulky spun yarn of the present invention, the value of the actual number of twists is higher than the set number of twists set at the time of manufacture, and is in a state of strong twist. On the other hand, the actual number of twists of a finished product in the production of general spun yarn is not much different from the number of set twists. This is because the number of twists is set based on the peripheral speed of the front roller pair 25.

  However, since the present invention is a manufacturing method in which the draft fiber bundle S1 is fed from the front roller pair 25 at a linear speed faster than the linear speed of the core yarn C, and the bulkiness is imparted, the manufacturing speed is higher than the linear speed of the front roller pair. Is determined by the linear velocity of the core yarn C which is slow. Therefore, when the number of twists is set based on the peripheral speed of the front roller pair as described above, the actual number of twists of the bulky spun yarn is twisted more than the set number of twists. The actual number of twists of the bulky spun yarn of the present invention is approximately the number of twists obtained by multiplying the above-mentioned general set number of twists by the ratio of the peripheral speeds of the chin roll pair and the front roller pair.

The bulkiness, tensile strength and elongation of the above bulky spun yarn were measured under the following conditions.
(1) Bulkiness measurement: JIS L 1095A method (2) Tensile strength measurement: Autograph tensile tester (manufactured by Shimadzu Corporation)
Crosshead speed: 300mm / min
Chuck interval: 100mm

  Next, a bulky spun yarn (B) was produced using the same raw materials as in Example 1 and the same number of twists and the same production equipment as in Patent Document 1, in order to observe the yield strength against swordfish. Next, the bulky spun yarn (A) and the bulky spun yarn (B) produced in Example 1 were cut into a length of 500 mm, and the sample was untwisted at one end and the filament of the core yarn was exposed to pull the sample. Using a testing machine, the yield strength of bulky spun yarn was measured.

  As shown in FIG. 7, the proof strength against the squeak is reduced by using a measuring jig 35 having a pore 34 where the exposed portion of the filament 31 of the core yarn is slightly larger than the outer diameter of the filament and smaller than the outer diameter of the bulky spun yarn. The exposed end of the filament 31 was held by the load cell chuck 33 in the direction of arrow A through the hole 34, and the yield strength against scab was measured.

  The other end 32 of the bulky spun yarn was free. As the measurement starts, the bulky spun yarn end 32 rotates in a direction to return the twist, and the filament is pulled out from the bulky spun yarn. Fiber bundles piled up and accumulated. The filament 31 was pulled out until the load applied to the filament reached 50 g, and the length of the exposed filament was measured. As a result, the bulky spun yarn (B) was exposed to a length of 230 mm, the bulky spun yarn (A) was 92 mm, and the bulky spun yarn produced in this example had a proof stress of twice or more. The tensile speed was measured at 100 mm / min, and the length of the exposed filament part was shown as an average value of three-point measurement.

Next, two bulky spun yarns prepared under the conditions of Example 1 were prepared, and twisted at a turn of 6.1 times / inch in the direction opposite to the twist direction (Z direction) of the bulky spun yarn (S direction) using a twisting device. Then, a bulky spun yarn of twin yarn was produced and soaped. Soaping conditions were as follows: Soaking agent (Attack laundry synthetic detergent: manufactured by Kao Corporation) was dissolved in 40 ° C warm water for 30 minutes, taken out, washed, dehydrated, and dried with 50 ° C warm air. . When the bulkiness after the soaping treatment was measured, it was 14.3 cm ³ / g.

Using the staple fiber bundle and core yarn of Example 1 and the ring spinning device 20, a bulky spun yarn having a cotton yarn count of 12/1 was produced. As production conditions, the number of twists is set to 14.0 times / inch, the peripheral speed of the front roller pair with respect to the core yarn linear speed is 1.48 times, the draft rate is 19.8 times, Traveler No15 (KANAI O type) Set to. The bulky spun yarn of this example had a bulkiness of 10.25 cm ³ / g, a tensile strength of 7.4 N, and an elongation of 45.3%. Moreover, as a result of measuring the actual twist number with a tester, it was 20.6 times / inch, and the twist coefficient was 5.95. When the yield strength against scabs was measured in the same manner as in Example 1, the proof strength of the bulky spun yarn produced in this example was 82 mm. Next, two bulky spun yarns prepared under the conditions of this example were prepared, and the twist direction (Z direction) and the reverse direction (S direction) of the bulky spun yarn were 6.6 times / inch using a twisting device. A twisted yarn was produced as a bulky spun yarn and subjected to the same soaping treatment as in Example 1. The bulky spun yarn bulkiness was 14.26 cm ³ / g.

A bulky spun yarn with a cotton yarn count of 20/1 was produced in the same manner as in Example 1 except that the core yarn described in Example 1 was changed to a nylon filament (NY56T-17-2294) fineness of 50 denier. As the production conditions, the number of twists is set to 18.5 times / inch, the peripheral speed of the pair of front rollers with respect to the core yarn linear speed is 1.38 times, the draft rate is 19.8 times, Traveler No. 2/0 (KANAI O type) ). The bulkiness of the bulky spun yarn of this example was 10.5 cm ³ / g. Moreover, as a result of measuring the actual number of twists with a tester, it was 25.2 times / inch and the twist coefficient was 5.63.

A bulky spun yarn having a cotton yarn count of 24/1 was produced in the same manner as in Example 1 except that the core yarn described in Example 1 was changed to a nylon filament (NY56T-17-2294) fineness of 50 denier. As production conditions, the number of twists was set to 20.2 times / inch, the peripheral speed of the front roller pair with respect to the core yarn linear speed was 1.36 times, the draft rate was 19.8 times, and Traveler No. 3 (KANAI O-type) was set. . The actual twist number of the bulky spun yarn of this example was 27.5 times / inch, and the twist coefficient determined from the actual twist number was 5.61. The bulkiness of the bulky spun yarn was 10.55 cm ³ / g.

A bulky spun yarn having a cotton yarn count of 30/1 was produced in the same manner as in Example 1 except that the core yarn described in Example 1 was changed to a nylon filament (NY56T-17-2294) fineness of 50 denier. As production conditions, the number of twists is 22.6 times / inch, the peripheral speed of the pair of front rollers with respect to the core yarn linear speed is 1.36 times, the draft rate is 19.8 times, Traveler No. 2/0 (O type made by KANAI) Set. The actual twist number of the bulky spun yarn of this example was 30.7 turns / inch, and the twist coefficient determined from the actual twist number was 5.60. The bulkiness of the bulky spun yarn was 10.65 cm ³ / g.

A staple fiber bundle (average fiber length 30 mm, 200 gr / 30 Yard) of 100% US cotton fiber and a nylon filament (NY33T-6204) fineness of 30 denier and cotton yarn # 40/1 (ring yarn spinning machine 20 shown in FIG. 1) 22.9 times / inch), the number of twists is set to 14.0 times / inch, the peripheral speed of the front roller pair is set to 1.3 times the core yarn linear speed, and the bulkiness of the cotton yarn count is 8/1 Made spun yarn. The actual twist number of the bulky spun yarn of this example was 18.0 times / inch, and the twist coefficient determined from the actual twist number was 6.36. The bulky spun yarn had a bulkiness of 10.06 cm ³ / g, a tensile strength of 2.9 N, and an elongation of 12.9%.

Next, two bulky spun yarns prepared under the above conditions are prepared, and twisted at 7.1 times / inch in the twist direction (Z direction) and the reverse direction (S direction) of the bulky spun yarn using a twisting device. A bulky spun yarn was produced, and the soaping treatment was performed in the same manner as in Example 1 and the bulkiness was measured. As a result, it was 13.7 cm ³ / g.

A short spinning ring spinning device having the same capability as the ring spinning device 20 shown in FIG. 1 is combined with Indian cotton fiber combed roving yarn (RET S6) staple fiber bundle (230 gr / 30 Yard) and a tetron filament (core yarn). 33T-12-N202) A bulky spun yarn with a cotton yarn count of 35/1 was manufactured by supplying a fineness of 30 denier. As production conditions, the number of twists is 24.6 turns / inch, the circumference of the top roller 5 is 88.0 mm (φ28), 42 independent grooves 13 are arranged in three rows, and the circumferential speed of the front roller pair with respect to the core yarn linear velocity is determined. It was set to 1.33 times, draft rate 45.7 times, Traveler No2 (KANAI Ms / hf type). As a result of measuring the actual twist number of this bulky spun yarn as in Example 1, the actual twist number was 33.5 times / inch, and the twist coefficient determined from the actual twist number was 5.66. Further, the bulkiness, tensile strength and elongation of the bulky spun yarn were measured in the same manner as in Example 1. As a result, the bulkiness was 11.35 cm ³ / g, the tensile strength was 1.59 N, and the elongation was 27.6%. Met. Next, two bulky spun yarns of this example were prepared, and the bulky yarn was twisted at 10.7 times / inch in the opposite direction (S direction) to the bulky spun yarn twist direction (Z direction) using a twisting device. A spun yarn was obtained. Moreover, it was 11.91 cm < ³ > / g as a result of performing the soaping process on the conditions similar to Example 1, and measuring the bulkiness.

Using the ring spinning apparatus 20 of Example 7, a staple fiber bundle of 100% rice cotton fiber (average fiber length 30 mm, 200 gr / 30 Yard) and a Tetron filament (33T-12-N202) fineness of 30 denier as the core yarn were supplied. A bulky spun yarn of cotton yarn count 32/1 was produced. As production conditions, the number of twists was set to 24.6 times / inch. The bulky spun yarn had an actual twist number of 33.5 times / inch, and the twist coefficient determined from the actual twist number was 5.9. Further, the bulkiness of the bulky spun yarn was 11.05 cm ³ / g.

  A wool fiber spinning device 20 shown in FIG. 1 is supplied with a staple fiber bundle (average fiber length of 80 mm) of 100% hemp fibers and a nylon filament with a fineness of 30 denier as the core yarn. 3 times / inch, hemp count 71/1 (wool count 1/43) under the same conditions as in Example 1 except that the peripheral speed of the front roller pair 25 was changed to 1.30 times the linear speed of the core yarn C. ) Hemp bulk spun yarn.

When the tension of this example was measured, it showed a periodic runout in the range of 5 g to 7.5 g. The actual twist number of this hemp bulk spun yarn was 26.3 times / inch. The bulky hemp spun yarn had a bulkiness of 17.36 cm ³ / g, a tensile strength of 2.21 N, and an elongation of 30.8%. In addition, two hemp bulk spun yarns manufactured under the above-mentioned conditions are prepared and twisted at 8.9 times / inch in the opposite direction (Z direction) to the hemp bulk spun yarn using a twisting device. As a result of producing a bulky spun yarn and performing a soaping process similar to that in Example 1 and measuring the bulkiness, the bulkiness was 18.36 cm ³ / g.

  According to the bulky spun yarn manufacturing method according to the present embodiment, since the staple fiber bundle S1 is supplied in abundance around the core yarn C, the spun yarn can be obtained with a softer touch than before. Preferably, as will be apparent from Comparative Examples 1 and 2 described later, a plurality of independent grooves are formed on the surface of the front roller pair 25 to make the staple fiber bundle itself bulky or the core yarn C is cut. It is also possible to reduce the possibility of being performed.

(Comparative Example 1)
A spun yarn was manufactured under the same conditions as in Example 3 except that a roller without the independent groove 13 was used for the top roller 5 of the front roller pair 25. In this comparative example, when the tension of the core yarn C was measured, it was 50 g or more (running out of the measuring device), and the core yarn C was cut and could not be mass-produced.

(Comparative Example 2)
A spun yarn was produced under the same conditions as in Example 1 except that the top roller 5 of the front roller pair 25 was a roller that did not have the independent groove 13. In this comparative example, when the tension of the core yarn C was measured, it was 50 g or more (running out of the measuring device), and slip occurred in the weight roller 8. When the core yarn (filament) is wound twice on the weight roller 8 and the operation of the ring spinning device is continued with the weight roller 8 eliminating the occurrence of slipping, the core yarn passes on the surface of the top roller 5 where the core yarn passes. Wear grooves due to the slip of the core yarn were generated over the entire circumference of the roller, causing bulkiness unevenness and yarn balls due to catching of the draft fiber bundle and variations in the linear velocity of the core yarn.

  When the method for producing bulky spun yarn of the present invention is used, bulky spun yarn can be produced using short fibers such as cotton fibers, and fabrics such as woven fabrics and knitted fabrics made of these spun yarns are light. It is excellent in moisture absorption and quick drying, and can be suitably used for bathrobes, towels, sportswear, or innerwear that directly contacts the skin.

1 Back roller pair 2 Middle roller pair 3 Apron 4 Base roller 5 Top roller 6 Bulky spun yarn 7 Spindle 8 Weight roller 9 Chin roller pair 10 Ring 11 Staple fiber bundle raw material bobbin 12 Core yarn raw material bobbin 13 Independent groove 14 Non-grooved portion 15 Traveler 20 Ring spinning device 21 Draft mechanism 22 Tension mechanism 23 Bulky processing mechanism 24 Intertwist mechanism 25 Front roller pair S Staple fiber bundle S1 Drawn fiber bundle C Core yarn B Bobbin

Claims (8)

A bulky spun single yarn consisting of a core yarn and a staple fiber bundle,
While the staple fiber bundle is drafted to form a draft fiber bundle by using a plurality of rope-stretching roller pairs, the core is placed on the downstream roller pair of the plurality of rope-stretching roller pairs. By simultaneously guiding the yarn and the draft fiber bundle and applying tension to the core yarn, the draft fiber bundle is passed through the roller pair on the downstream side at a linear velocity higher than the linear velocity of the core yarn. It is produced by forming a bulky fiber bundle and twisting the bulky fiber bundle and the core yarn,
A plurality of independent grooves are formed in at least one roller of the roller pair,
The staple fiber bundle is made of natural fibers, the length of a single fiber of the staple fiber bundle is 20 mm to 30 mm, the twist coefficient is 4.5 or more and 6.5 or less, and the bulkiness is 8.0 cm ³ / g or more. A bulky spun single yarn characterized by being 13.0 cm ³ / g or less. A bulky spun single yarn consisting of a core yarn and a staple fiber bundle,
While the staple fiber bundle is drafted to form a draft fiber bundle by using a plurality of rope-stretching roller pairs, the core is placed on the downstream roller pair of the plurality of rope-stretching roller pairs. By simultaneously guiding the yarn and the draft fiber bundle and applying tension to the core yarn, the draft fiber bundle is passed through the roller pair on the downstream side at a linear velocity higher than the linear velocity of the core yarn. It is produced by forming a bulky fiber bundle and twisting the bulky fiber bundle and the core yarn,
A plurality of independent grooves are formed in at least one roller of the roller pair,
It said staple fiber bundles are cotton fibers, bulky spinning twist coefficient of 4.5 to 6.5, and bulkiness is equal to or less than 8.0 cm ³ / g or more 13.0 cm ³ / g single yarn. A bulky spun single yarn consisting of a core yarn and a staple fiber bundle,
While the staple fiber bundle is drafted to form a draft fiber bundle by using a plurality of rope-stretching roller pairs, the core is placed on the downstream roller pair of the plurality of rope-stretching roller pairs. By simultaneously guiding the yarn and the draft fiber bundle and applying tension to the core yarn, the draft fiber bundle is passed through the roller pair on the downstream side at a linear velocity higher than the linear velocity of the core yarn. It is produced by forming a bulky fiber bundle and twisting the bulky fiber bundle and the core yarn,
A plurality of independent grooves are formed in at least one roller of the roller pair,
It said staple fiber bundles are hemp fibers, bulky spinning twist coefficient of 4.5 to 6.5, and bulkiness is equal to or less than 8.0 cm ³ / g or more 13.0 cm ³ / g single yarn. A bulky spun single yarn comprising a core yarn and a staple fiber bundle, wherein the staple fiber bundle is made of natural fiber, the length of the single fiber of the staple fiber bundle is 20 mm to 30 mm, and the twist coefficient is 4.5 or more 6.5, and bulky spun single yarn, wherein the bulkiness is not more than 8.0 cm ³ / g or more 13.0 cm ³ / g. A bulky spun single yarn comprising a core yarn and a staple fiber bundle, wherein the staple fiber bundle is a cotton fiber, the twist coefficient is 4.5 or more and 6.5 or less, and the bulkiness is 8.0 cm ³ / g or more and 13 A bulky spun single yarn characterized by being 0.0 cm ³ / g or less. A bulky spun single yarn comprising a core yarn and a staple fiber bundle, wherein the staple fiber bundle is hemp fiber, the twist coefficient is 4.5 or more and 6.5 or less, and the bulkiness is 8.0 cm ³ / g or more and 13 A bulky spun single yarn characterized by being 0.0 cm ³ / g or less.   The bulky spun single yarn according to any one of claims 1 to 6, wherein the core yarn is a filament, a spun yarn, or a combination yarn thereof.   Either of the bulky spun single yarn according to any one of claims 1 to 7 and the bulky spun yarn formed by twisting at least two of the bulky spun single yarn according to any of claims 1 to 7. Containing fabric.

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