JP5847564B2 - Composite paper yarn and method for producing the same - Google Patents

Description

  The present invention relates to a composite paper thread and a method for producing the same.

  For a long time, paper thread formed from paper has been used. In recent years, paper yarns are being reviewed from the viewpoints of lightness, moisture absorption / sweat absorption, air permeability, and functionality such as texture. Conventionally, as such a paper thread, a paper sheet is cut into pieces and formed into a tape shape, and the tape form is twisted to form a thread shape. However, since the paper yarn formed of paper alone has a hard property, it is not suitable as a yarn for a knitted fabric (knit) that requires softness and stretchability.

  Therefore, a composite paper yarn has been proposed in which a paper sheet is thinly formed in order to provide softness, and strength that is reduced by the thinning is reinforced by covering with spun yarn or filament yarn. For example, Patent Document 1 discloses a composite paper yarn in which a spun yarn or a filament yarn is covered with a paper yarn made from Manila hemp. Further, Patent Document 2 discloses a composite paper yarn in which a filament yarn is double-covered on a paper yarn formed of Japanese paper. With such a composite paper yarn, softness due to thin paper formation and expansion / contraction performance due to strength reinforcement using another spun yarn or the like can be imparted and used for knitting.

JP 2005-163244 A JP 2005-299020 A

  By the way, in the conventional composite paper yarn, in order to obtain the function of the paper yarn, the paper yarn portion is not exposed but covered, instead of covering all of the paper yarn portion serving as the core yarn (see Patent Document 2). (See FIG. 3). In this case, the strength of the composite paper yarn is ensured by the covering of the spun yarn or the like, but since the weak paper strength portion is exposed, only the exposed paper yarn portion is easily cut. Yes.

  When manufacturing such a knitted fabric by setting such conventional composite paper yarn on a knitting machine, if tensile force is applied to the composite paper yarn during the manufacturing process, the cover yarn such as spun yarn will not break, but the exposed portion of the paper yarn This makes it easier to cut only the paper thread. Then, there is a problem that the cut ends cause fuzz and the commercial value of the manufactured knitted fabric is lowered. In addition, although it pointed out as a problem in the case of manufacturing a knitted fabric here, the same problem may arise also in manufacturing a textile fabric.

  Therefore, a main object of the present invention is to obtain a composite paper yarn that can suppress the occurrence of fluffing due to only the paper yarn being cut even when a tensile force is applied.

  In order to achieve the above object, the composite paper yarn of the present invention spirally wraps a cover yarn around a core yarn including a paper yarn formed from tape-like paper with a part of the core yarn exposed. A composite paper yarn having a cover ring, wherein the core yarn has the paper and a center yarn, and the paper yarn is in an overfeed state with respect to the center yarn. Features.

  With the above configuration, the exposed portion of the core yarn is in a state where the excessive supply of the paper yarn with respect to the middle core yarn is raised to the outside of the center yarn. For this reason, only the center yarn functions as a substantial core yarn in terms of strength against the tensile force acting on the composite paper yarn, and the tensile force first acts on the center yarn, not the paper yarn in a floating state. For this reason, when a tensile force exceeding the tensile strength of the center yarn or the cover yarn is applied, the center yarn or the cover yarn is cut before the paper yarn, and the paper yarn is cut accordingly. As a result, it is possible to suppress the occurrence of a situation in which only the paper yarn is cut and causes fluffing while taking advantage of the functions of the paper yarn such as texture, moisture absorption / sweat absorbency, and air permeability.

  In the above invention, it is preferable that the cover yarn is single-covered by the cover yarn, and the cover yarn is wound in the same direction as the twist direction. In this case, since the winding of the cover yarn is a single covering, the covering step is only required once, and the manufacturing cost can be reduced. Further, since the cover yarn is wound in the same direction as the twist direction, the cover yarn is additionally twisted. The cover yarn is twisted and shrunk by this additional twist, and the core yarn is strongly tightened. As a result, it is possible to reduce the possibility of unwinding the paper thread that should be the core thread, and to maintain a state in which the paper thread is integrated as a composite paper thread to form a thread shape.

  When the cover yarn is wound in the direction opposite to the twist direction, the cover yarn itself is twisted back, and the yarn length is increased. For this reason, the effect of tightening the paper thread is reduced, and the problem arises that the paper thread is unwound. In this regard, as described above, since the tightening effect is enhanced in the present invention, the possibility of unwinding the paper yarn from the core yarn is reduced.

  The cover yarn is preferably a cellulosic chemical fiber in the Z twist direction. By using cellulosic chemical fibers in the Z twist direction, the effect of tightening the core yarn more strongly by winding the cover yarn while additionally twisting can be suitably obtained. For example, when using a yarn with a high degree of twist, such as cotton yarn, as the cover yarn, if it is wound in the same direction as the twist direction, the degree of twist is further increased and the force causing untwisting is increased, and the balance of the yarn is lost. There is a problem that the composite paper thread is inclined. In this regard, if a Z-twisted cellulosic chemical fiber is used, it is possible to suppress the occurrence of such a problem and obtain a suitable composite paper yarn that is balanced.

  Furthermore, if the paper thread is made from softwood or hardwood pulp, it can be manufactured at a lower cost than when manila hemp or gutters are used as raw materials, and the quality variation and dyeing unevenness can be reduced. Can do.

  The composite paper yarn is supplied with a flat tape-like paper and a center yarn to the false twist rotating portion in a state of applying tension to the center yarn and aligning them, and false twisting is performed. A false twisting step for forming a paper yarn in a yarn shape, and when the center yarn passes through the false twist rotating part and is deflammed, the tension on the center yarn is released, and the paper yarn is applied to the center yarn. An overfeeding step for overfeeding the cover yarn, and a covering step for spirally winding the cover yarn around both the central yarn and the paper yarn in the overfeed state so as to expose a part of them. It can obtain by the manufacturing method which has these.

Schematic which expands and shows the external appearance of a composite paper thread. Schematic which shows the manufacturing apparatus of composite paper yarn.

<Composite paper thread 10>
As shown in FIG. 1, the composite paper yarn 10 has a core yarn 20 and a cover yarn 30 wound around the core yarn 20 in a spiral shape. The core yarn 20 is formed by a paper yarn 21 formed using paper as a raw material and a center yarn 22 made of spun yarn.

  The paper thread 21 is formed so that a flat tape-shaped paper thread T (see FIG. 2) is false twisted to be rounded and wrinkled to form a thread shape. The tape-shaped paper thread T before becoming the paper thread 21 is formed by thinly cutting a thin paper sheet formed from softwood pulp.

  The thickness of the paper sheet is preferably set to 8 to 12 g per square meter, more preferably 10 g per square meter. By setting the value to less than 12 g per square meter, it becomes a relatively thin paper sheet (tape-like paper thread T), and the softness can be imparted by softening the hardness which is a weak point of the paper thread 21. On the other hand, when the value is less than 8 g per square meter, the paper sheet (tape-like paper thread T) becomes too thin, and there is a problem that holes are easily opened in the manufacturing process of the composite paper thread 10.

  The width of the tape-shaped paper thread T forming the paper thread 21 is preferably set to 1.2 to 4 mm, and more preferably 2.4 mm. As described later, a viscose rayon is used for the center yarn 22 constituting the core yarn 20 together with the paper yarn 21. Even if the tape-like paper yarn T is made thin and soft as described above, the rayon is used. Harder than For this reason, in order to ensure functions such as softness, texture, air permeability and the like for the composite paper yarn 10, it is preferable that the mixing ratio of the paper in the composite paper yarn 10 is about 30 to 70%. % Is more preferable. By setting the tape-like paper thread T to the aforementioned thinness and width, a mixing ratio in this range can be obtained. If the mixing ratio of the paper is less than 30%, the texture and air permeability due to the use of the paper cannot be secured, and conversely if it exceeds 70%, the softness is impaired.

  The softwood pulp used as the raw material for the paper thread 21 is not particularly limited, and for example, spruce, Southern pine, Radiata pine, Ezo pine, Todo pine, Douglas fir, hemlock, etc. are used. One kind of softwood pulp or a mixture of two or more kinds may be used. The reason why softwood pulp was used as an optimal example of the raw material of the paper yarn 21 is that it is excellent in terms of cost and quality. For example, when the paper yarn 21 is manufactured using pulp such as Manila hemp or gutter, it costs about five times as compared with the case of using softwood pulp. In addition, since the pulp of Manila hemp uses the skin of the surface as a raw material, there are demerits that quality variation is large and uneven dyeing easily occurs. In this respect, these disadvantages can be eliminated by using softwood pulp.

  The center yarn 22 is specifically a viscose rayon formed by Z-twisting, and the 30th yarn is used. The material of the center yarn 22 is not limited to viscose rayon, but may be any cellulosic chemical fiber twisted in the Z twist direction. Examples of the cellulosic chemical fibers include, besides the above viscose rayon, regenerated cellulose fibers such as copper ammonia rayon (cupra) and polynosic rayon, and purified cellulose fibers. When the knitted fabric is manufactured using the composite paper yarn 10, the count range of the center yarn 22 is preferably 30 or less, and preferably 22 or less when combined with the cover yarn 30.

  The cover yarn 30 for covering the core yarn 20 is also a spun yarn of viscose rayon twisted in the Z twist direction, and the 30th yarn is used. Thus, the 30th cover yarn 30 is wound around the core yarn 20 having the 30th center yarn 22, so that the composite paper yarn 10 is the 15th yarn. In this case, since the paper thread 21 is formed thin as described above, the number of counts of the composite paper thread 10 is not significantly affected. Note that the cover yarn 30 may be any cellulosic chemical fiber twisted in the Z twist direction, as with the center yarn 22. When the knitted fabric is manufactured with the composite paper yarn 10, it is preferable that the cover yarn 30 has a count range of 30 or less and a composite with the center yarn 22 is 22 or less.

  Regarding the winding (covering) of the cover yarn 30, first, the number of the cover yarn 30 is one, which is a single covering. The number of twists of the cover yarn 30 is preferably set to 300 to 400 T / m, and more preferably set to 360 T / m. When the number of twists is set within this range, the entire core yarn 20 is not covered with the cover yarn 30, and the core yarn 20 is exposed as shown in FIG. For this reason, the paper thread 21 is exposed on the surface of the composite paper thread 10, and the functions of the paper thread 21 such as texture, moisture absorption / sweat absorbency, and air permeability are not impaired.

  The winding direction of the cover yarn 30 is the same as the twisting direction of the cover yarn 30 itself, that is, the Z twisting direction. Thus, since the cover yarn 30 is wound in the same direction as its own twist direction, the cover yarn 30 is in a state of being additionally combusted by winding. The cover yarn 30 is twisted and shrunk by this additional twist, and the core yarn 20 is tightened more strongly. Thereby, the composite of the paper yarn 21 and the center yarn 22 is promoted, and the unwinding of the paper yarn 21 from the core yarn 20 can be suppressed.

  As described in detail in the manufacturing method of the composite paper yarn 10 described later, the core yarn 20 at the stage of winding the cover yarn 30 is in a state in which the paper yarn 21 is slightly excessively supplied (over-fed) to the center yarn 22. ing. That is, the paper thread 21 has an excess portion with respect to the center thread 22. The cover yarn 30 is wound around the core yarn 20 in such a state while being combusted, and the core yarn 20 is strongly tightened by the cover yarn 30. For this reason, in the exposed portion of the core yarn 20 where the cover yarn 30 does not exist (the portion that is not tightened by the cover yarn 30), the surplus portion of the paper yarn 21 is in a state where it floats out of the center yarn 22. .

<Production apparatus 40 and production method of composite paper yarn 10>
Next, a manufacturing apparatus 40 and a manufacturing method for manufacturing the composite paper yarn 10 will be described. As shown in FIG. 2, the manufacturing apparatus 40 of the composite paper yarn 10 includes a feed roller 41, a covering device 42, a delivery roller 43, and a take-up roller 44, which are provided in order from the top to the bottom. For this reason, in this manufacturing apparatus 40, as shown by the arrow in FIG. 2, the yarn advances from the upper side to the lower side.

  The feed roller 41 has at least a pair of rollers 41a and 41b. The feed roller 41 rotates both the pair of rollers 41a and 41b to feed both the tape-like paper yarn T supplied from the tape-like paper yarn supply unit 51 and the central yarn 22 supplied from the central yarn supply unit 52. Pulling them together and feeding them out as a core yarn 20. In this case, tension is applied to the center yarn 22 in the direction in which the center yarn 22 extends.

  The covering device 42 includes a hollow spindle 61 and a false twist spindle 62. The hollow spindle 61 and the false twist spindle 62 are provided so as to be rotatable about the vertical direction, and both of them rotate in the same direction and at the same rotational speed. As described above, in the composite paper yarn 10, a Z-twisted one is used as the center yarn 22, and the cover yarn 30 is spirally wound in the Z-twist direction, so that the yarn traveling direction from top to bottom is used as a reference. In this case, the rotation direction is the right direction.

  The hollow spindle 61 arranged above the false twist spindle 62 is provided with a package P around which the cover yarn 30 is wound. The hollow spindle 61 has a hollow portion 61a penetrating vertically, and the core yarn 20 fed from the feed roller 41 is introduced into the hollow portion 61a from its upper opening and led out from the lower opening. Further, the cover yarn 30 drawn from the package P is also introduced into the hollow portion 61a from its upper opening and is led out from the lower opening.

  The core yarn 20 and the cover yarn 30 led out from the hollow portion 61a are introduced into the false twist spindle 62 disposed below the hollow spindle 61 from above. Then, after the core yarn 20 and the cover yarn 30 are hooked on the V-shaped yarn path guide 63, they are pulled out downward. Among the yarns, the center yarn 22 constituting the core yarn 20 is supplied to the false twist spindle 62 in a state where the tension is applied as described above, but by passing through the V-shaped yarn path guide 63, Release from tension. The false twist spindle 62 corresponds to a false twist rotating part.

  The delivery roller 43 disposed below the false twist spindle 62 has at least a pair of rollers 43a and 43b. The delivery roller 43 sends the core yarn 20 and the cover yarn 30 that have passed through the V-shaped yarn path guide 63 toward the winding roller 44 by the rotation of the rollers 43a and 43b that make a pair.

  By using the manufacturing apparatus 40 configured as described above, the core yarn 20 and the cover yarn 30 are formed as the composite paper yarn 10 through the following process.

  First, along with the rotation of the false twist spindle 62, the core yarn 20 composed of the tape-like paper yarn T and the center yarn 22 supplied from the supply portions 51 and 52 is false twisted. That is, the core yarn 20 is twisted in the twisted state until it reaches the feed roller 41 on the upstream side of the V-shaped yarn path guide 63 of the false twist spindle 62. On the other hand, on the downstream side after passing through the V-shaped yarn path guide 63 and until reaching the delivery roller 43, the core yarn 20 is in an untwisted state where the twist is returned. This corresponds to the false twist stage.

  The tape-like paper thread T is supplied in a thin and flat shape as described above. When the core yarn 20 that has been aligned in this state is twisted, the tape-like paper yarn T is rounded to form a yarn shape, and is then twisted together and wound around the center yarn 22. It becomes a state. The center yarn 22 is also twisted by twisting. For this reason, the twisted core yarn 20 is entirely twisted and has a yarn length shorter than the yarn length at the time of supply. Here, the term “thread length” refers to a length arbitrarily set for a part of the thread in order to compare the length of the core thread 20 in each process.

  After that, when the twisted core yarn 20 is untwisted, the tape-like paper yarn T is a paper having a poor plasticity, so that it does not return to its original flat state, but is wrinkled and rounded. The resulting paper thread 21 forms a thread shape. The thread length of the paper thread 21 has returned to the original length.

  On the other hand, about the center yarn 22, the number of twists returns to the original state by untwisting. However, since the tension of the center yarn 22 is released as described above, the yarn length is longer than the twisted state by twisting, but is shorter than the original yarn length. For this reason, a state is formed in which the paper yarn 21 that is shorter than the original yarn length is short and the paper yarn 21 is relatively excessively supplied (over-fed) to the center yarn 22. That is, the paper thread 21 has an excess portion with respect to the center thread 22. This corresponds to the overfeed stage.

  The cover yarn 30 that also passes through the V-shaped yarn path guide 63 winds around the core yarn 20 that has passed through the V-shaped yarn path guide 63 and is in the above-described state, as the hollow spindle 61 rotates. In the winding stage (covering stage) of the cover yarn 30, the cover yarn 30 is spirally wound in the same Z twist direction as the Z twist direction, which is the twist direction of the cover yarn 30 itself. Further, the rotational speed of the hollow spindle 61 is set so that the number of twists of the cover yarn 30 is 360 T / m.

  By adopting such a covering method, the cover yarn 30 is twisted and wound around the core yarn 20 to tighten the core yarn 20 more strongly. By tightening the cover yarn 30, in a portion where the core yarn 20 is exposed, a surplus portion of the paper yarn 21 is raised toward the outside of the center yarn 22. As a result, the composite paper yarn 10 described with reference to FIG. 1 can be obtained in the portion that has passed through the V-shaped yarn path guide 63. The composite paper thread 10 thus formed is fed out by the delivery roller 43 and taken up by the take-up roller 44.

<Effect>
As described above, according to the composite paper yarn of this embodiment and the manufacturing method thereof, the following advantageous effects can be obtained.

  (1) The cover yarn 30 is wound around the core yarn 20 so as to expose a part of the core yarn 20, and the excess supply of the paper yarn 21 rises to the outside of the center yarn 22 in the exposed portion of the core yarn 20. It is in a state like that. In this configuration, only the center yarn 22 functions as the substantial core yarn 20 in terms of strength, and the tensile force first acts on the center yarn 22. For this reason, when the composite paper yarn 10 is cut, the center yarn 22 and the cover yarn 30 are cut before the paper yarn 21, and the paper yarn 21 is cut accordingly. it can. Thus, while taking advantage of the functions of the paper yarn 21 such as texture, moisture absorption / sweat absorbency, and air permeability, the causative factors of fuzz can be removed, and the product yield of knitted fabrics and fabrics can be increased.

  (2) Since the composite paper yarn 10 is single-covered by the cover yarn 30, the covering process is only required once, and the manufacturing cost of the composite paper yarn 10 can be reduced.

  (3) In the single-covered composite paper yarn 10, the cover yarn 30 is spirally wound in the same Z twist direction as the Z twist which is the twist direction. For this reason, the cover thread | yarn 30 will be in the state twisted by winding. Since the cover yarn 30 is twisted and shrunk by this additional twisting and the core yarn 20 is strongly tightened, the possibility of unwinding the paper yarn 21 that should be the core yarn 20 can be reduced. As a result, the composite paper thread 10 can maintain a state in which the paper thread 21 is integrated to form a thread.

  (4) The cover yarn 30 is made of a spun yarn of billows rayon twisted in the Z twist direction. For example, in the case where the degree of twisting is large, such as cotton yarn, there is a problem that the force that causes twisting by additional twisting is increased, and the balance of the yarn is lost and the composite paper yarn 10 is inclined. In this regard, if cellulose-based chemical fibers such as viscose rayon are used, there is no such problem, and the effect of strongly tightening the core yarn 20 by additional twisting can be suitably obtained.

  (5) The paper thread 21 is formed from softwood pulp. For this reason, the composite paper yarn 10 can be manufactured at a lower cost than when manila hemp or a trough is used as a raw material. In addition, the demerits of Manila hemp, which can cause large variations in quality and easily cause uneven dyeing, can be eliminated.

  (6) As a method for manufacturing the composite paper yarn 10, the paper yarn 21 is formed into a yarn shape by false twisting of a flat tape-like paper yarn T. In addition, the tension is released when the center yarn 22 is supplied with tension and then passed through the false twisting spindle 62 to be flared. Then, the yarn length of the center yarn 22 is shortened, and the overfeed state of the paper yarn 21 is formed. By such a manufacturing method, it is possible to suitably form the tape-shaped paper thread T and form the paper thread 21 in an overfeed state.

<Other embodiments>
(A) In the above embodiment, spun yarn of cellulose-based chemical fiber is used for the center yarn 22 and the cover yarn 30, but as the fiber material, for example, natural fiber such as wool or cotton yarn, synthetic fiber such as polyester or the like is spun. Yarn may be used. However, the balance surface as a yarn (the yarn and the product using it are not tilted), the surface of the composite paper yarn 10 that is threaded (the thread-like state is maintained by tightening the cover yarn 30). In view of the above, it is preferable to use a cellulosic chemical fiber. Further, a filament yarn may be used instead of the spun yarn. However, since filament yarn is expensive, it is preferable to use spun yarn in view of cost.

  (B) In the above embodiment, the same yarn (30th viscose rayon spun yarn) is used for both the center yarn 22 and the cover yarn 30, but different types of fibers or different yarns are used. May be. For example, the center yarn 22 may be 15th spun yarn of viscose rayon, while the cover yarn 30 may be 30th cotton yarn.

  (C) In the above embodiment, the cover yarn 30 is wound in the same direction as its twist direction, but may be wound in the opposite direction. For example, when a cover yarn 30 having a high degree of twist such as cotton yarn is used and wound in the same direction as the twist direction and additionally twisted, the degree of twist is further increased, and the force causing reversion is increased. Then, the balance as a thread | yarn will be lost and the problem that the formed composite paper thread | yarn 10 will incline arises. For this reason, it is preferable to wind in the direction opposite to the twist direction in the case where the degree of twist is strong, such as cotton yarn.

  (D) In the above embodiment, the cover yarn 30 is used for single covering. However, another cover yarn 30 may be used to form a double covering. Even when the double cover ring is used, the paper thread 21 is exposed on the surface of the thread by winding the core thread 20 so that a part of the core thread 20 is exposed. This is because the function of the paper thread 21 is not impaired. By performing this double covering, the manufacturing process increases and the cost is increased, but the strength as the composite paper yarn 10 is increased. Moreover, about the paper thread | yarn 21 and the center thread | yarn 22 which comprise the core thread | yarn 20, not only 1 piece like the said embodiment but 2 or more multiple pieces can also be used.

  (E) In the above embodiment, softwood pulp is used as the raw material of the paper thread 21, but hardwood pulp may be used instead. Even when hardwood pulp is used, the problems (expensive and quality variations) of Manila hemp and gutters can be solved.

  DESCRIPTION OF SYMBOLS 10 ... Composite paper yarn, 20 ... Core yarn, 21 ... Paper yarn, 22 ... Center yarn, 30 ... Cover yarn, 62 ... False twist spindle (false twist rotation part), T ... Tape-like paper yarn.

Claims (5)

A composite paper thread that is covered with a core thread including a paper thread formed from tape-like paper, and in which a cover thread is wound in a spiral manner with a portion of the core thread exposed,
The composite paper yarn, wherein the core yarn includes the paper and a center yarn, and the paper yarn is over-fed to the center yarn by false twisting .   The composite paper yarn according to claim 1, wherein the cover yarn is single-covered by the cover yarn, and the cover yarn is wound in the same direction as the twist direction.   The composite paper yarn according to claim 2, wherein the cover yarn is a cellulosic chemical fiber in a Z twist direction.   The composite paper yarn according to any one of claims 1 to 3, wherein the paper yarn is formed using softwood pulp or hardwood pulp as a raw material. A flat tape-like paper and a center yarn are supplied to the false twist rotating portion in a state where tension is applied to the center yarn and aligned, and false twisting is performed, and the tape-like paper is formed into a yarn. False twisting step to be formed,
An overfeed stage in which when the center yarn passes through the false twist rotating portion and is deflared, the tension to the center yarn is released and the paper yarn is over-fed to the center yarn;
A covering step in which a cover thread is spirally wound around both the center thread and the paper thread in an overfeed state so as to expose a part of the thread;
A method for producing a composite paper yarn, comprising:

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