JP2016204812A - Composite japanese paper yarn and manufacturing method thereof, japanese paper yarn fabric and japanese paper yarn knit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knitted fabric used for an item made of Japanese paper and a composite Japanese paper yarn used for the knitted fabric, which have hygroscopicity, durability and excellent tactile.MEANS FOR SOLVING THE PROBLEM: A composite Japanese paper yarn comprises a composite yarn, which is made by twisting a Japanese paper yarn made of Japanese paper that is slit in tape-like shape as a main component and a reinforcing yarn. A yarn length difference rate E between the Japanese paper yarn and the reinforcing yarn in the composite yarn is 1.5 to 12%. Average gradient of pull force-expansion rate curve in an expansion region with the expansion rate E to E+3.5% is 1 to 2.5 times that of the expansion region with the expansion rate 0% to E in the composite Japanese paper yarn. A knitted fabric is obtained using the composite Japanese paper yarn.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a Japanese paper yarn woven fabric and a Japanese paper yarn knitted fabric used for articles made of Japanese paper. In particular, the present invention relates to a Japanese paper thread fabric that can be suitably used for running shoes and the like that are excellent in durability and have little foot stuffiness and little foot damage when used for a long time. The present invention also relates to composite Japanese paper yarns suitably used for those knitted fabrics and a method for producing the same.

  Running shoes are one of the important characteristics, especially when they are used for long-distance races, and so on. For this reason, a raschel knitted fabric with a large mesh is used as the upper material (for example, Patent Document 1). Such a knitted fabric having a large opening has an opening of about 1 to several mm, and is suitable for releasing or evaporating moisture caused by sweating of the feet when the athlete runs. However, it can be said that fine foreign matters such as sewage and sand easily enter the inside of the shoe during traveling. Moreover, since unevenness becomes large depending on the structure of the knitted fabric, it cannot be said that there is no sense of incongruity in the foot.

  For this reason, there is a demand for an upper material that has little mesh opening and excellent hygroscopicity and efficiently dissipates moisture due to sweating of the foot to the outside, thereby reducing foot stuffiness and foot damage.

  Furthermore, in long-distance races, there are not a few cases in which running shoes are used barefoot and returned to primitive driving. Barefoot running is said to be the most natural for human running, because it does not impose an unreasonable burden on the feet or the whole body and is less fatigued. In such a mode of use, it is often the case that a bean is formed or that the bean is torn during travel. There is a need for running shoes that are less likely to cause such foot damage.

  In addition, there is a demand for a high-density fabric with a smooth surface made of yarn made of Japanese paper, as well as a running shoe fabric.

  In addition, there is a problem that yarn made of Japanese paper has many yarn breaks in fabric production such as weaving and knitting.

JP 2005-160697 A

  The present invention is suitable for an upper material that has almost no mesh opening and has excellent hygroscopicity and efficiently dissipates moisture due to sweating of the foot to the outside, thereby reducing foot stuffiness and foot damage. It aims at providing a Japanese paper thread fabric.

  Another object of the present invention is to provide a high-density Japanese paper yarn woven fabric made of Japanese paper that has almost no openings and a smooth surface.

  Furthermore, an object of the present invention is to provide a composite Japanese paper yarn that can improve the problem of many yarn breaks in weaving or knitting of Japanese paper yarn.

  The gist of the present invention consists of a composite yarn in which a Japanese paper yarn mainly composed of Japanese paper slit in a tape shape and a reinforcing yarn are twisted together with a separable twist coefficient of 70 to 250, and the reinforcing yarn The maximum elongation at the stress point of the yarn is 8% or more, the tensile force at 3% elongation is 1/20 or more of the tensile strength of the Japanese paper yarn, and the fineness of the Japanese paper yarn and the fineness of the reinforcing yarn The ratio is 1: 1 to 15: 1, and the composite Japanese paper yarn has a yarn length difference ratio of 1.5 to 12% between the Japanese paper yarn and the reinforcing yarn in the composite yarn.

  In the composite Japanese paper yarn, when E is a rate equal to the yarn length difference rate, the average gradient of the tensile force-elongation rate curve in the elongation range of the elongation rate E to E + 3% in the tensile force-elongation rate curve is , It may be 1 to 2.5 times the average slope of the elongation range from 0% to E.

  In the composite Japanese paper yarn, the reinforcing yarn may include a heat-fusible fiber.

  In the composite Japanese paper yarn, the reinforcing yarn may be a filament yarn made of a side-by-side type composite fiber of polyethylene terephthalate and polytrimethylene terephthalate.

  Further, the gist of the present invention resides in that the composite Japanese paper yarn is a composite Japanese paper yarn which is further thermally contracted.

  Further, the gist of the present invention resides in a method for producing a composite washi yarn, characterized in that the composite washi yarn is prepared and the composite washi yarn is thermally contracted.

  Further, the gist of the present invention is a method for producing the composite Japanese paper yarn, the step of preparing the Japanese paper yarn having a twist coefficient of 50 to 200, the Japanese paper yarn and the reinforcing yarn are aligned, The present invention is a method for producing a composite Japanese paper yarn including a step of twisting the twisted Japanese paper yarn in a direction opposite to the twisting direction of the twisted Japanese paper yarn with a twist number of 1.5 to 3 times the twist number of the Japanese paper yarn.

The gist of the present invention is a method for producing the composite Japanese paper thread,
Preparing the substantially untwisted Japanese paper yarn comprising the Japanese paper slit in the tape shape;
Applying water to the washi yarn to obtain a wet washi yarn,
The wet Japanese paper yarn and the reinforcing yarn are in a state where they are aligned, and a method for producing a composite Japanese paper yarn comprising a step of twisting with a twist number of 70 to 250 in a twisted state.

The gist of the present invention is a method for producing the composite Japanese paper thread,
Preparing the substantially untwisted Japanese paper yarn comprising the Japanese paper slit in the tape shape;
Applying water to the washi yarn to obtain a wet washi yarn,
Manufacture of a composite washi yarn including a step of overfeeding the wet washi yarn to the reinforcing yarn, supplying both to the twisting region of the twisting machine, and twisting with a twist number of 70 to 250 Is where the way is.

  The gist of the present invention resides in a Japanese paper yarn fabric in which the composite Japanese paper yarn is used as at least a part of the warp, and the ratio of the number of the composite Japanese paper yarn in the warp is 30% or more.

  The gist of the present invention is a woven fabric having a plain weave structure or a twill weave structure, wherein the composite Japanese paper yarn is a warp, the composite Japanese paper yarn is a weft, and a weft weave density coefficient is 35 to 55. It is the place where it is the said Japanese paper thread fabric.

  Further, the gist of the present invention is a woven fabric having a plain weave structure or a twill weave structure, wherein the washi yarn is composed mainly of Japanese paper slit in a tape shape, and the composite washi yarn is used as a warp, The weft yarn weaving fabric has a weft weave density coefficient of 35-50.

  Further, the gist of the present invention resides in that the Japanese paper yarn woven fabric is further woven by thermal shrinkage, and the composite Japanese paper yarn used in the woven fabric is a Japanese paper yarn woven fabric which is the composite Japanese paper yarn. .

  Further, the gist of the present invention resides in a running shoe using the above-mentioned Japanese paper yarn fabric as an upper.

  Further, the gist of the present invention resides in a Japanese paper yarn knitted fabric obtained by knitting the composite Japanese paper yarn.

  In the Japanese paper yarn woven fabric, the reinforcing yarn includes heat-fusible fibers, and the heat-fusible fibers can be fused in the reinforcing yarn.

  In the Japanese paper yarn knitted fabric, the reinforcing yarn includes heat-fusible fibers, and the heat-fusible fibers can be fused in the reinforcing yarn.

  According to the present invention, there is provided a high-density woven fabric made of Japanese paper having almost no openings and a smooth surface.

  According to the present invention, it is suitable for the upper material, which has almost no mesh opening and is excellent in hygroscopicity and efficiently dissipates moisture due to sweating of the foot to the outside, thereby reducing foot stuffiness and foot damage. A Japanese paper yarn fabric is provided.

  In addition, the present invention provides a composite washi yarn that can improve the problem of many yarn breaks in weaving and knitting of washi yarn.

  In addition, according to the present invention, a composite Japanese paper thread with good coverage of the Japanese paper thread is provided.

The schematic diagram for demonstrating the change of the tension | tensile_strength of the warp at the time of beating. Fig. 2 is a typical tensile force-elongation curve of Japanese paper yarn used in the present invention. Fig. 3 is a typical tensile force-elongation curve of the composite washi yarn of the present invention. The other example of the tensile force-elongation rate curve of the composite Japanese paper thread | yarn of this invention. An example of the organization chart of the Japanese paper thread fabric of the present invention. The other example of the organization chart of the Japanese paper thread fabric of this invention. The other example of the organization chart of the Japanese paper thread fabric of this invention.

  The present invention relates to a high weaving density Japanese paper yarn fabric using a Japanese paper yarn, a composite Japanese paper yarn that can be suitably used for the fabric, and a method for producing the same. The present invention also relates to a knitted fabric using composite Japanese paper yarn.

  The Japanese paper yarn woven fabric of the present invention is a woven fabric in which a yarn mainly composed of Japanese paper is used for at least a part or all of warp yarns, and a yarn mainly composed of Japanese paper is used for at least some or all of weft yarns. . The woven fabric is preferably a plain woven fabric or a twill woven fabric. In addition, these structures | tissues of this textile fabric include induction | guidance | derivation structures | tissues, such as a mat | matte woven fabric and a woven fabric, and a change structure | tissue. A plain weave or twill weave has a tight structure because it has little yarn floating, and is suitable as a fabric structure used in applications where a strong force acts, such as shoes. The Japanese paper yarn fabric of the present invention is suitably used for an upper of a running shoe.

The Japanese paper used in the present invention is a paper made by pulverizing a Japanese paper raw material made of fibers obtained by beating a raw material plant suitable for Japanese paper such as Kozo, Mitsumo, husks, hemp, conifers, hardwoods and cocoons. The weight of Japanese paper is preferably about 10 to 30 g / m ^{2 in} terms of manufacturing technology. However, it is possible to use a paper having a large basis weight exceeding this range or a basis weight being small beyond this range.

  The Japanese paper used in the present invention may contain raw material fibers other than the above Japanese paper raw material as long as it is 20% by weight or less. If the content of fibers other than the Japanese paper raw material exceeds 20% by weight, the hygroscopicity and strength peculiar to Japanese paper are inferior, which may affect the characteristics of products such as running shoes in the present invention. In the Japanese paper used in the present invention, the content of the Japanese paper raw material is most preferably 90% by weight or more in terms of product performance.

A thread mainly composed of Japanese paper used in the present invention (hereinafter referred to as “Japanese paper thread”) is a Japanese paper tape (substantially untwisted) obtained by slitting Japanese paper into a thin tape (for example, 0.8-30 mm width). Of Japanese paper), a product obtained by twisting this Japanese paper tape (twisted Japanese paper yarn), or a twisted yarn of Japanese paper tape and other yarn (twisted Japanese paper yarn). That is, the Japanese paper thread used in the present invention is a Japanese paper thread whose main component is Japanese paper slit in a tape shape. The Japanese paper yarn may be a twisted yarn of a Japanese paper tape and another yarn, but the Japanese paper yarn contains 60% by weight or more of Japanese paper, which means that the Japanese paper yarn has good hygroscopicity and lack of stuffiness. Necessary to maintain the original performance. If the ratio of the non-Japanese paper thread to the Japanese paper thread is 40% by weight or less, the performance unique to the Japanese paper thread, such as good hygroscopicity and a unique smooth feel, is maintained. It is more preferable that the Japanese paper thread is composed only of Japanese paper. The Japanese paper yarn may be a single yarn or a double yarn. The linear density (weight per unit length) of the Japanese paper thread is preferably 1/60 (g / m) to 1/8 (g / m). That is, in the case of a single yarn, it is preferably 60 to 8th. The Japanese paper yarn is preferably twisted in order to obtain the strength of the yarn. The number of twists of paper yarn, it is preferable twist coefficient _{K W} is 50 to 150. K _W is a value defined by T / √N (T is the number of yarn twists (times / m), and N is the yarn count (reciprocal of yarn linear density (g / m)).

  The yarn count in this specification refers to a metric count.

  In the present specification, “twist number” means the number of twists per unit length unless otherwise specified.

  A woven fabric using Japanese paper yarn is excellent in hygroscopicity and is therefore suitable for uppers of running shoes, etc., but a plain woven or twill woven fabric has a dense and smooth surface when the woven fabric density is high, and Excellent form stability when subjected to repeated external forces. In this respect, the Japanese paper yarn fabric of the present invention is more preferably a plain weave fabric.

  However, when manufacturing a woven fabric using Japanese paper yarn for part or all of the warp, if the beating force is increased in order to obtain a high weaving density woven fabric, the warp tension generated by beating during weaving (beating force) Therefore, the trouble that the Japanese paper thread of the warp is cut easily occurs. This is because the Japanese paper yarn is a low elongation yarn having an extremely small maximum stress point elongation of about 4% or less at most, and is easily cut by an impact force in the longitudinal direction of the yarn on the Japanese paper yarn. In addition, the initial tensile elastic modulus of Japanese paper yarn is as high as about 50 to 80 cN / dtex, and even in a static woven structure structure, it is difficult to obtain a woven structure having a high weft weave density because it is difficult to warp and stretch easily. This is because the impact force is further increased when trying to obtain a high-density fabric. In particular, a plain woven fabric or a twill woven fabric has a high tendency because there is little yarn floating.

Since the warp tension is generated independently for each warp, a thread other than the Japanese paper thread is also arranged in the warp (the total number of warp threads N is _one Japanese paper thread N and a thread N ₂ other than the Japanese paper thread). Even in the case of book sum), it is impossible to avoid the trouble that this Japanese paper thread cuts with a punching force.

  In the present invention, the initial tensile elastic modulus (G) was determined by grasping a yarn of fineness x (dtex) with a span tester at a span interval of 20 cm and elongating at a pulling speed of 1 mm / sec and applying a tensile stress of 0.05 cN / dtex. When the length (span) of the yarn is L0 and the tensile load when the yarn is extended by 1% of the reference length from that state is W (cN), G = (W− (0.05 × x)) ) × 100 / x, which is a value G (cN / dtex).

  In order to improve the tensile strength of the yarn, it is a conventional means to simply combine the main yarn and the reinforcing yarn by twisting and twisting them. It is difficult to obtain the effect of improving the impact tension.

  For example, when the initial tensile elastic modulus of the reinforcing yarn is low, when producing a fabric using such a simple twisted yarn as a warp, the cutting and stretching of the Japanese paper yarn whose main yarn is the reinforcing yarn with the warp tension generated by punching. Since the Japanese paper thread tends to be cut when it is stretched to a degree (maximum stress point elongation), it is difficult to obtain the effect of improving the strike impact tension.

  In addition, when the initial tensile elastic modulus of the reinforcing yarn is as high as or higher than that of Japanese paper yarn, such a simple twisted yarn has a high elastic modulus equivalent to or higher than that of Japanese paper yarn. It is difficult to warp the warp, and therefore it is difficult to obtain a fabric having a high weft weave density.

  The present inventor has studied to obtain a high-weaving density woven fabric using Japanese paper thread, and has reached the present invention.

  In the Japanese paper yarn woven fabric of the present invention, a reinforcing yarn is used in addition to the Japanese paper yarn for the purpose of improving the strike impact resistance of the warp of the woven fabric. The composite yarn of the present invention is obtained by combining the reinforcing yarn and the washi yarn. This composite Japanese paper thread is used for warp of textiles. Composite washi yarn may also be used for weft. This composite Japanese paper yarn is a composite yarn in a state in which a Japanese paper yarn and a reinforcing yarn are twisted together.

  In the present invention, the “twisted state” of the Japanese paper yarn and the reinforcing yarn means that the composite yarn in which the Japanese paper yarn and the reinforcing yarn are combined is fixed at one end of the straight composite yarn, The washi yarn and the reinforcing yarn are combined so that the end can be rotated a predetermined number of times in one direction around the longitudinal direction of the composite yarn, so that the washi yarn and the reinforcing yarn can be separated from each other. A state in which the yarn and the reinforcing yarn are entangled with each other in a spiral shape (double spiral shape) around the yarn axis of the composite yarn. In the present specification, the number of rotations required for separating the unit-length composite Japanese paper yarn in such an embodiment is defined as a separable twist number (T / m).

  Due to the “twisted state” of the washi yarn and the reinforcing yarn, the composite washi yarn of the present invention is not easily deformed when subjected to a squeezing force in the direction of the yarn axis. Such a squeezing force occurs when the yarn travels while being rubbed by a guide, or when the yarn is applied to the knitting needle during knitting.

  Examples of the reinforcing yarn include filament yarn (multifilament yarn) made of artificial fibers such as polyester fiber, nylon fiber, polyolefin fiber, and rayon, processed yarn, and spun yarn. Spun yarns or blended yarns made of natural fibers for textiles such as cotton, hemp, and silk, or filament yarns may be used.

  The ratio between the fineness of the Japanese paper yarn and the fineness of the reinforcing yarn in the composite Japanese paper yarn is preferably 1: 1 to 15: 1. When the ratio of the Japanese paper thread in the composite Japanese paper thread is below this range, the characteristics of the product such as running shoes in the present invention are affected. That is, the moisture absorption of the product and the moisture generated by sweating of the foot are efficiently diffused to the outside, which results in inferior performance such as less foot stuffiness and less foot damage. When the ratio of the washi yarn in the composite washi yarn exceeds this range, the woven effect due to the use of the reinforcing yarn is hardly exhibited.

  Furthermore, the initial tensile elastic modulus of the reinforcing yarn used for this composite Japanese paper yarn is preferably 20 to 150 cN / dtex. When the initial tensile elastic modulus of the reinforcing yarn is less than 20 cN / dtex, the force applied to the reinforcing yarn is small when the reinforcing yarn is extended to near the cutting elongation of the Japanese paper yarn by warp tension generated by the hammering. Since the thread may be a factor of cutting, it is preferable that the initial tensile elastic modulus of the reinforcing thread is 20 cN / dtex in order to obtain the effect of improving the strike impact tension. When the initial tensile elastic modulus of the reinforcing yarn is 20 cN / dtex or more, the tendency of the washi yarn to be cut when the reinforcing yarn is extended to the cutting elongation of the washi yarn with warp tension generated by punching is extremely small. It is preferable for obtaining the effect of improving the strike impact tension. If the initial tensile elastic modulus of the reinforcing yarn exceeds 150 cN / dtex, the initial tensile elastic modulus of the composite Japanese paper yarn increases, and the warp yarns tend to be difficult to stretch and stretch in a static woven structure structure. It is not optimal for obtaining a fabric structure.

  In the composite Japanese paper yarn used in the present invention, the length of the Japanese paper yarn existing in the composite Japanese paper yarn is different from the length of the reinforcing yarn present in the composite Japanese paper yarn. Specifically, the length of the Washi yarn taken out by separating the composite Washi yarn (cut compound Washi yarn) cut into a predetermined length Lc into Washi yarn and reinforcing yarn is La, and the length of the reinforcing yarn. When Lb is Lb, the value R of ((La−Lb) / Lb) × 100% is 1.5 to 12%. In order to obtain a woven fabric having a high weft weave density, R is more preferably 4 to 9%. R can be obtained by separating the cut composite Japanese paper yarn into a Japanese paper yarn and a reinforcing yarn by untwisting or the like and measuring the respective lengths. The value of Lc is not particularly limited, but is preferably 20 to 30 cm from the viewpoint of ease of measurement.

  Due to the fact that La is larger than Lb in such a range of R and the above-described twisted state of the composite washi yarn, the washi yarn has a substantially spiral shape around the axis of the composite washi yarn in the composite washi yarn. It exists in a crimped state that makes In the present invention, this R is defined as the yarn length difference rate (between the washi yarn and the reinforcing yarn in the composite washi yarn). The length of the Japanese paper yarn and the reinforcing yarn separated from the composite Japanese paper yarn cut to the predetermined length Lc is adjusted by returning the twist generated by the separation operation as needed. The length is measured so that the number of twists of the Japanese paper yarn and the reinforcing yarn before the number is combined.

  The length of the yarn in the present invention is a length when an elongation load of 0.05 cN / dtex is applied to the yarn.

  When warp tension acts during weaving, the length of the Japanese paper yarn present in the composite Japanese paper yarn is different from the length of the reinforcing yarn present in this composite Japanese paper yarn as described above. The tension is generated in the wire and the reinforcing yarn is extended (A stage). In the A stage, the Washi yarn is stretched in the longitudinal direction of the composite Washi yarn from a substantially spiral crimped state until it becomes almost straight, but the main tension applied to the Washi yarn is the Washi yarn in a substantially spiral crimped state. This is the force required to stretch the yarn until it becomes substantially linear, and the washi yarn will not be cut by this tension.

  When the composite washi yarn is further extended, the washi yarn is in a substantially straight state, and a large tension is generated on the washi yarn. When the warp tension increases after the A stage, the warp tension that stretches the yarn in the longitudinal direction of both the Japanese paper thread and the reinforcing thread acts (B stage). In this B stage, the warp tension reaches the maximum by beating. In the B stage, a high warp tension necessary for obtaining a high weft weave density is handled mainly by the Japanese paper yarn and the reinforcing yarn. At this time, due to the presence of the A stage, it is possible to avoid the trouble that the Japanese paper yarn extends beyond the cutting elongation of the Japanese paper yarn and cuts until the warp yarn is stretched by beating and the warp tension reaches the maximum.

  If R is less than 1.5%, there is no A stage or it is very short, so excessive tension is applied to the Japanese paper thread at the beginning of the B stage, and the Japanese paper thread is likely to be cut. If R is greater than 12%, the spiral structure of the Japanese paper thread may be woven without being fully stretched and one beating may be completed at the A stage, and the smoothness of the surface of the Japanese paper thread fabric may be deteriorated. is there.

  In the composite Japanese paper yarn of the present invention, R is more preferably 4 to 9% in view of the smoothness of the surface of the Japanese paper yarn fabric. It is more preferable that R is 5 to 7% in view of avoiding trouble that the Japanese paper yarn is cut and the smoothness of the surface of the Japanese paper yarn fabric.

  Further, since the warp tension at the initial stage of the B stage is smaller than the peak value of warp tension due to beating, the tensile force when the reinforcing thread is stretched by 3% is 1/20 or more of the tensile strength of the Japanese paper thread. It is preferable.

  Since the composite washi yarn is in a state where the washi yarn and the reinforcing yarn are twisted together, the reinforcing yarn compresses the washi yarn in its radial direction and restrains it as the composite washi yarn expands. Also in the A stage, that is, in the initial extension region corresponding to the A stage of the composite washi yarn, it is considered that a force for stretching the washi yarn together with the reinforcing yarn is generated. As a result, the gradient of the tensile force-elongation rate curve in the initial elongation region of the composite Japanese paper thread is close to the gradient of the tensile force-elongation rate curve in the elongation region corresponding to the B stage, and the tensile force-elongation rate curve is It appears that the composite Japanese paper thread will be able to withstand a sharp beating force that exceeds the cut elongation of the Japanese paper thread.

  For this purpose, the composite Japanese paper yarn preferably has a separable twist coefficient Ks of 70 to 250. The separable twist coefficient Ks is a value defined by Ts / √N (Ts is the number of separable twists of the yarn (times / m), and N is the count of the composite Japanese paper yarn). It is further preferable that the separable twist coefficient Ks is 100 to 250 in view of being able to withstand a rapid striking force. It is most preferable that Ks is 150 to 250 in order to withstand a sharp striking force.

  When Ks is less than 70, the reinforcing yarn has little force to restrain the washi yarn in the initial extension region corresponding to the A stage of the composite washi yarn, and the impact force of the heavy weight is generated on the washi yarn by beating at the B stage. There is a risk of the thread breaking. When Ks exceeds 250, the smoothness of the surface of the Japanese paper yarn fabric is deteriorated. In addition, since it approaches the region where twisting occurs, the strength of the composite Japanese paper thread is also lowered, which is not preferable.

  The tensile force at the time of 5% elongation of the yarn in the present invention is that the yarn is held at both ends with a span interval (grip interval) of 200 mm by a tensile tester and stretched at a pulling speed of 200 mm / min, and the tensile stress is 0.05 cN / dtex. This is a value defined by a tensile load when the length (span) of the yarn when applied is a reference length and the yarn is further extended by 5% of the reference length from this state.

  The maximum elongation at the stress point of the yarn in the present invention is the length of the yarn when the yarn is held at both ends by a tensile tester with a span interval of 20 cm and stretched at a pulling speed of 200 mm / min and a tensile stress of 0.05 cN / dtex is applied. When the length (span length) is defined as the reference length L0 and the length (span length) of the yarn when the yarn is stretched to reach the maximum stress from the state is defined as L1, ((L1-L0) / L0) × It is a value defined by 100 (%).

  The tensile strength of the yarn in the present invention refers to the force when the yarn reaches the maximum stress point elongation.

  In addition, the value regarding the physical property of a thread | yarn in this specification, and a form are measured in the environment of 20 degreeC and 65% RH. This value is the average of the measured values obtained for 10 samples sampled randomly.

  Further, as described above, the initial tensile elastic modulus of the reinforcing yarn is preferably 20 to 300 cN / dtex. However, if the initial tensile elastic modulus of the reinforcing yarn is less than 20 cN / dtex, the warp tension becomes Washi yarn in the B stage. Since it is excessively heavy, the Japanese paper thread may be cut off at the B stage.

(Manufacturing method 1)
As a method for producing a composite Japanese paper yarn, there is a production method including a reverse twisting step in which twisted Japanese paper yarn and reinforcing yarn are aligned and twisted in a direction opposite to the twisting direction of the twisted Japanese paper yarn. Can be mentioned. That is, in this case, the Japanese paper yarn to be subjected to the reverse twisting process is a Japanese paper yarn in a twisted state. The twisted Japanese paper thread is obtained by twisting a Japanese paper tape. Alternatively, it is obtained by twisting an alignment yarn of Japanese paper tape and another yarn. When the Japanese paper yarn is a single yarn in a twisted state, the Japanese paper yarn subjected to the reverse twisting process may be further twisted in the twisting direction. In this case, the number of twists of the Japanese paper yarn subjected to the reverse twisting step is the sum of the number of twists before the additional twist and the number of twists of the additional twist. The Japanese paper yarn may be a twin yarn. In this case, the twisting direction of the reverse twisting process is the reverse direction (reverse twisting) to the twisting direction of the Japanese paper yarn. When the Japanese paper yarn is a twin yarn, the Japanese paper yarn subjected to the reverse twisting process may be further twisted in the upper twist direction. When the Japanese paper yarn is a double yarn, the number of twists of the Japanese paper yarn subjected to the reverse twisting process is the upper twist number of the Japanese paper yarn. In the case where the double Japanese paper yarn is twisted, the number of twists of the Japanese paper yarn subjected to the reverse twisting process is the sum of the number of top twists and the number of additional twists before the twisting is the number of twists of the composite Japanese paper yarn. Moreover, in this case, the twisting direction of the reverse twisting process is opposite to the upper twisting direction of the Japanese paper yarn subjected to the reverse twisting process.

  In this production method, the original twist and shrinkage of the washi yarn and / or the twist of the washi yarn (or washi tape) in the forward twisting process is returned in the reverse twisting process. The length of the Washi yarn is larger than the twist of the Washi yarn, and there is a difference in yarn length between the Washi yarn or Washi tape and the reinforcing yarn in the composite Washi yarn of a certain length. A thread structure intertwining spirally with the axis as an axis is generated. That is, the composite Japanese paper thread | yarn of this invention is obtained by adjusting the twist number in a forward twist process and a reverse twist process. The reinforcing yarn subjected to the reverse twisting step is preferably a non-twisted, multifilament yarn twisted to a twist coefficient of 20 or less for yarn convergence, or a twin yarn spun yarn.

  It is preferable that the twist coefficient of the Japanese paper yarn to be subjected to the reverse twisting process (in the case of twin yarn, the twist coefficient of the upper twist) is 50 to 200. It is preferable that the number of twists of the aligned yarn in the reverse twisting process is 1.5 to 3 times the number of twists of the Japanese paper thread used in the reverse twisting process. By such reverse twisting, the Japanese paper yarn itself has a twist, and the Japanese paper yarn and the reinforcing yarn are intertwined in a spiral shape around the axis of the composite Japanese paper yarn and are appropriately twisted.

(Manufacturing method 2)
As another method for producing a composite Japanese paper yarn, a twisted Japanese paper yarn (yarn A) and a reinforcing yarn (yarn B) are continuously used in a twisting region of a twisting machine such as a ring twisting machine. And a twisting step of supplying and twisting to obtain the composite washi yarn. In this case, the Japanese paper yarn is over-fed into the twisted region in the twisting step. The twisting direction of the twisting process is the same as the twisting direction of the washi yarn.

  As a result, a yarn length difference between the Japanese paper yarn and the reinforcing yarn is generated in the composite Japanese paper yarn having a certain length, and the Japanese paper yarn and the reinforcing yarn are intertwined in a spiral shape about the axis of the composite Japanese paper yarn. A yarn structure results. The overfeed means that when the yarn A and the yarn B are continuously supplied to the twisted region at the same time, the length a of the yarn A supplied to the twisted region in a certain time is longer than the length b of the yarn B. It means to supply as big. The value of a / b (overfeed rate) is preferably 1.015 to 1.12. When the value of a / b is out of this range, it is difficult to obtain a composite Japanese paper yarn having a value R of ((La−Lb) / Lb) × 100% of 1.5 to 12%.

  As a method of overfeeding the Japanese paper yarn to the twisted region, for example, the twisted region of the ring twisting machine is different between the twisted Japanese paper yarn and the reinforcing yarn at different speeds (Japanese paper yarn supply speed> reinforcement yarn supply speed). The method of simultaneously supplying to is mentioned. The Japanese paper yarn is over-fed to the twisted region by this speed difference (the difference between the length of the reinforcing yarn supplied to the twisted region per unit time and the length of the Japanese paper yarn supplied to the twisted region per unit time). It will be.

(Manufacturing method 3)
As another method for overfeeding the Japanese paper yarn twisted in the twisted region for the same purpose as in the production method 2, for example, the twisted Japanese paper yarn and the reinforcing yarn are aligned to obtain the A method of simultaneously supplying the feed roll to the feed roll and applying a predetermined tension higher than the tension of the reinforcement thread in the twisted region to the supplied reinforcement thread can be mentioned. In this case, most of the tension of the reinforcing yarn is released in the twisted region, whereby the reinforcing yarn is elastically recovered in the longitudinal direction, and as a result, the Japanese paper yarn is overfeeded to the twisted region.

(Manufacturing method 4)
As another method for producing the composite washi yarn, there is a method in which the washi yarn is covered with the reinforcing yarn and then twisted in the same direction as the winding direction of the reinforcing yarn. Covering can be performed, for example, by continuously winding the Japanese paper thread around the reinforcing thread by rotating the hollow bobbin wound with the Japanese paper thread and passing the reinforcing thread through the hollow portion of the hollow bobbin.

(Manufacturing method 5)
In addition, the composite Japanese paper yarn of the present invention can be obtained by twisting in a state where the substantially non-twisted and wet Japanese paper tape and the reinforcing yarn are aligned (aligned state). “Substantially untwisted” refers to a state in which twisting is not possible except for inevitable twisting such as unwinding twisting that occurs during the manufacturing process. Unwinding twisting is a twist generated by pulling a yarn (Japanese paper tape) vertically from a wound body, and depending on the diameter of the wound body, the number of twists is, for example, 2 to 30 T / m. Further, even if the twist is added to the Japanese paper tape due to other factors, the degree of influence on the coverage is small as long as the number of twists is 100 T / m or less, and the effects of the present invention can be obtained. That is, in this specification, the substantially non-twisted Japanese paper tape refers to a Japanese paper tape having a twist number of 100 T / m or less.

  The twisting can be performed by a twisting machine having a twisting mechanism. Examples of the twisting machine include a ring twister, an up twister, and a double twister. The twisting coefficient of twisting is preferably 70 to 250. If the twist coefficient is below this range, a good coating may not be obtained. If the twist coefficient exceeds this range, the yarn tends to be hard, and the good texture and feel of the product may be impaired. A twist coefficient of 80 to 150 is more preferable for obtaining a good coating and a good tactile sensation.

  When a ring twister is used as a twisting machine, substantially untwisted and wet Japanese paper tape and reinforcing yarn are simultaneously fed to the twisting area of the twisting machine using a feed roll or the like at the same speed. Can be obtained.

  A method for obtaining a wet Japanese paper tape is a method of immersing a Japanese paper tape roll or a winding thread of a Japanese paper tape and a reinforcing yarn in water and absorbing the water into the Japanese paper tape, and then removing it from the water. Examples thereof include a method of spraying, dripping, or flowing down water on a Japanese paper tape that travels toward a twisted region. Alternatively, a method of bringing a Japanese paper tape traveling toward the twisted region into contact with a so-called kiss roll having water attached to the surface, or a Japanese paper tape traveling toward the twisted region including water-containing felt such as felt Although the method etc. which are made to contact are illustrated, it is not limited to these.

  When a double twister or an up twister is used as a twisting machine, as a method for making the washi tape wet, the washi tape and the reinforcing thread are drawn together and wound to form a wound thread body. Before putting on the twisting machine, immerse it in water and absorb it into the washi tape, then take it out of the water and add water to the washi thread that composes the washi tape. An example is a method in which the Japanese paper tape is moistened by applying moisture to the Japanese paper tape before winding it into a wound body.

  In the composite washi yarn obtained by such a method, the washi tape covered the reinforcing yarn very well. This good covering property can be confirmed by the composite Japanese paper yarn obtained by using the undyed Japanese paper tape and the reinforcing yarn dyed in dark color in the production method 5. That is, with the composite washi yarn obtained in this way, the washi tape covered the reinforcing yarn very well, so that the reinforcing yarn is hardly exposed on the yarn surface, and the reinforcing yarn is visually recognized. It can be confirmed that this is extremely difficult.

  Therefore, the composite Japanese paper yarn obtained by the production method 5 not only has good weaving properties, but the knitted fabric using the composite Japanese paper yarn hardly exposes the reinforcing yarn on the surface. Thereby, a very good Japanese paper-like feel can be obtained.

(Manufacturing method 6)
In addition, the composite washi yarn of the present invention is substantially untwisted and gives a speed difference between the wet washi tape and the reinforcing yarn. It can be obtained by supplying the region with a feed roll or the like and twisting at a twisting coefficient of 70 to 250. That is, it can be obtained by overfeeding a substantially non-twisted and wet Japanese paper tape to the reinforcing yarn and supplying them to the twisting region of the twisting machine. In this case, the value of the overfeed rate is preferably 1.015 to 1.12. A ring twister can be used as the twister.

  By the production method 6, a composite washi yarn in which the washi tape is coated with the reinforcing yarn even better than the composite washi yarn obtained by the production method 5 is obtained. Further, the composite Japanese paper yarn obtained by the production method 6 has a higher elongation than the composite Japanese paper yarn obtained by the production method 5, and exceeds the knitting property.

  In the manufacturing method 5, since the Japanese paper tape is in a wet state, the Japanese paper tape is easily stretched in the longitudinal direction, and is easily stretched by the force of extending the Japanese paper tape generated during twisting in the longitudinal direction. Therefore, there is a difference in yarn length between the reinforcing yarn and the covering property of the washi tape is improved in combination with the fact that the supplied washi tape is substantially untwisted. Presumed to be the main factor obtained. In the production method 6, it is considered that the coverage of the Japanese paper tape is further improved by the effect of overfeeding in addition to the stretched effect.

In the manufacturing methods 5 and 6, the Japanese paper tape provided to a twist area is a wet Japanese paper tape. A damp washi tape refers to a washi tape in a state where the washi constituting the washi tape retains moisture at a moisture content of 30% by weight or more. It is more preferable that the moisture content is 50% by weight or more in the production methods 5 and 6 in order to obtain a composite Japanese paper having good coverage of the Japanese paper tape. Moisture content, wet paper tape weight W _w, when the weight of dry paper tapes obtained The wet paper tape was dried at 105 ° C. 20 minutes was W _d, ((W _w -W _d ) / W _d ) × 100 (%). This moisture is the moisture retained by the cellulose fibers by moisture absorption of the cellulose fibers constituting the Japanese paper, the moisture adsorbed on the surface of the cellulose fibers constituting the Japanese paper, the moisture retained by the capillary phenomenon between the cellulose fibers constituting the Japanese paper, etc. It is comprised by. The upper limit of the preferred moisture content is not particularly limited, but excess water is generated during the process such as twisting, for example, during the process of twisting due to centrifugal force or inertial force due to the rotation of the yarn, natural fall, etc. Is removed without any conscious extra operation.

(Manufacturing method 7)
Still further, the composite washi yarn used in the present invention is a twisted yarn or a product obtained by twisting the washi yarn and the reinforcing yarn after aligning the washi yarn using the property of the washi yarn that is difficult to heat shrink. It can be obtained by heat-shrinking the reinforcing yarn by heating the composite Japanese paper yarn obtained by any one of methods 1 to 6.

  The composite Japanese paper yarn obtained by the production method 7 corresponding to any one of the production methods 1 to 6 has a higher elongation than the composite Japanese paper yarn obtained by any of the corresponding production methods 1 to 6. Superior to knitting.

  The composite Japanese paper yarns obtained by the production methods 1 to 7 are in a state in which the Japanese paper yarn and the reinforcing yarn are entangled and twisted in a spiral shape around the axis of the composite Japanese paper yarn. When this entanglement is sufficient, a force is generated that the reinforcing yarn compresses and restrains the washi yarn in its radial direction as the composite washi yarn is stretched. Therefore, even in the A stage, that is, the composite shown in FIG. In the model of the “tension force-elongation rate” curve of the Japanese paper yarn, it is considered that a force that the Japanese paper yarn is stretched together with the reinforcing yarn is generated even in the initial elongation area AA corresponding to the A stage of the composite Japanese paper yarn. As a result, the gradient of this curve in the elongation area AA of the composite Japanese paper thread becomes close to the gradient of this curve in the elongation area BB corresponding to the B stage.

When paying attention to the Japanese paper yarn in the composite Japanese paper yarn, the composite Japanese paper yarn of the present invention has a structure in which the Japanese paper yarn itself is twisted about the direction along the yarn axis of the Japanese paper yarn. elongation zone tension in AA force of the thread - slope P ₁ is the tensile force in the extension region BB elongation curve - tend to become as close to the gradient P ₂ elongation curve, a value close P ₁ is the P ₂ Become. In the production method 1, when the number of twists of the reverse twist is larger than the number of twists of the Japanese paper yarn before the reverse twist, the tendency is remarkably revealed.

  Thus, the composite Japanese paper thread of the present invention has a gradient of the tensile force-elongation rate curve in the extension region AA that is close to the gradient of the tensile force-elongation rate curve in the extension region BB. Since the Japanese paper yarn sufficiently restrains the reinforcing yarn, the ability to absorb the impact force applied to the Japanese paper yarn by hammering is great. For this reason, the warp yarn is hardly cut by beating, the weft can be driven with a strong force, and a Japanese paper yarn woven fabric having a very high weft weave density and almost no openings can be obtained.

Composite paper yarn of the present invention, a tensile force - elongation E of the point elongation range corresponding to the gradient P ₁ elongation curve changes elongation range corresponding to the gradient P ₂ is affected by the yarn length Saritsu R . As E1 is the same value as the yarn length Saritsu R of the composite paper yarn object (E1 = R), the extension region to Q ₁ composite paper yarn elongation 0~E1 (%) as a decompression zone AA, elongation zone tension of Q ₁ - the average slope of the elongation curve and _{P 1,} elongation E1 (= R) ~ (E1 + E2) of the elongated zone _{Q 2} elongation zone BB and then pulling force _{Q 2} - average slope of elongation curve It is referred to as _{P 2.} It P ₂ is 1 to 2.5 times the P ₁ is, cutting of the warp yarns does not easily occur due to beating, preferable for obtaining a large paper yarn fabric weft weaving density. E2 is a value represented by E2 = Emax (%) when the maximum stress point elongation of the Japanese paper thread is Emax (%). Here, P ₂ can be regarded as substantially equivalent to the average gradient of the tensile force-elongation rate curve of Q ₂ when E2 = 3%. Therefore, it P ₂ when the E2 = 3% is 1 to 2.5 times the P _1, the cutting of the warp is less likely to occur due to beating, preferable for obtaining a large paper yarn fabric weft weaving density . Most preferably, it is 1 to 2.5 times.

  Elongation rate is the length (span) of the yarn when the yarn is held at both ends with a span interval (grip interval) of 200 mm by a tensile tester, stretched at a pulling speed of 200 mm / min, and a tensile stress of 0.05 cN / dtex is applied. Is defined as a value of E when the yarn is further extended E (%) of the reference length from that state.

Composite paper yarn property that P ₂ is 1 to 2.5 times the P ₁ is, for example, tensile strength at 3% elongation of the reinforcing yarn is 1/15 or more paper yarn tensile strength, initial Tensile elastic modulus is 40 to 120 cN / dtex, ratio of fineness of Japanese paper yarn to fineness of reinforcing yarn is 3: 1 to 8: 1, yarn length difference ratio R is 4 to 9%, and composite Japanese paper It was found that the Japanese paper yarn and the reinforcing yarn in the yarn can be obtained by a composite Japanese paper yarn in a state where they are intertwined in a spiral shape around the axis of the composite Japanese paper yarn.

  As a manufacturing method for obtaining the composite Japanese paper yarn of the present invention having such characteristics, it is preferable to employ the manufacturing method 1 because the process is simple. Moreover, in this manufacturing method 1, the twist coefficient (the twist coefficient of the top twist in the case of twin yarn) of the Japanese paper thread used for the reverse twist process is 50 to 200, and the twist number of the aligned yarn in the reverse twist process is reversed. It is preferable that it is 1.5 to 3 times the twist number of the Japanese paper thread to be subjected to the twisting step.

  Further, in order to obtain a composite Japanese paper thread having good covering properties, it is preferable to employ production methods 5 and 6, or production method 7 based on production method 5 or 6. It is more preferable to employ the manufacturing method 6 or the manufacturing method 7 based on the manufacturing method 6.

  As described above, the Japanese paper yarn is a yarn having a very low elongation, and is easily cut by the impact in the longitudinal direction of the yarn. For this reason, since the loom stops frequently and the production efficiency is impaired, it is difficult to obtain a fabric having a high weft yarn density from Japanese paper yarn. However, when the composite Japanese paper yarn is used as the warp and the Japanese paper yarn A is driven as the weft, the weft yarn of the same number as the composite Japanese paper yarn is used as the warp, and about 30% of the weft yarn is used as the weft. It was found that a woven fabric having a high weave density can be obtained without impairing the normal production efficiency.

That is, when a composite Japanese paper yarn is used as a warp, for example, when a Japanese paper yarn of the same number as the composite Japanese paper yarn is driven as a weft, a Japanese paper yarn fabric having a weft weave density coefficient of 50 can be obtained without impairing normal production efficiency. . The weft weave density coefficient K is defined as K = W × √G. Here, W is the weave density of the weft yarn (10/10 cm), and G is the linear density of the weft yarn (g / m (reciprocal number)). The (maximum) value of the weft weave density coefficient is K ₀ = 50. In contrast, when the paper yarn of the same yarn count in warp and weft weaving density coefficient of paper yarn fabric capable conventional weaving is less than 0.65K _0. The weft density W of the weft is the number of wefts per unit width in the warp direction of the fabric.

When a plurality of types of yarns having different counts are used for the wefts, G is an arithmetic average value of the linear density of each yarn. For example, when the weft consists of the weft ₁ and the weft ₂ , the warp direction is the width direction, the number of wefts ₁ existing within the unit width is Y1, the line density is G1, the number of wefts ₂ is Y2, the line density is G2, G is given by G = (G1 × Y1 + G2 × Y2) / (Y1 + Y2). The unit width is set so as to correspond to an integer multiple of repetitions in the warp direction of the woven structure. In addition, in calculating G, it was found that the arithmetic average was used as the average value of the linear density, and it was more realistic than the geometric average and the harmonic average (the arithmetic average).

In addition, when a twisted yarn obtained by twisting a Japanese paper yarn and a reinforcing yarn and then twisting is used as a warp yarn, a Washi yarn capable of normal weaving if the yarn length difference ratio R is less than 1.5%. weft weaving density factor K of the fabric is less than 0.7 K _0.

  When both the weft and the warp are composite Japanese paper yarns, a Japanese paper yarn woven fabric having a higher weft weave density can be obtained without impairing normal production efficiency than when the composite Japanese paper yarn is used as a warp and the Japanese paper yarn is driven as a weft. That is, even when the woven structure is plain or twill, a Japanese paper yarn woven fabric having a weft weave density coefficient of 35 to 55 can be obtained without impairing normal production efficiency.

  The warp and weft used in the Japanese paper yarn woven fabric of the present invention are preferably yarns having the same number, in view of the balance of the mechanical properties of the fabric, but the warps and wefts do not necessarily have the same number depending on the application.

  Further, the Japanese paper yarn fabric of the present invention may be a woven fabric using a yarn other than the composite Japanese paper yarn as a part of the warp yarn in addition to the composite Japanese paper yarn. An unwoven fabric using yarn other than composite Japanese paper yarn as part of the warp and weft may be used. It may be a woven fabric using yarn other than the Japanese paper yarn of the present invention as at least a part of the weft. Examples of the union woven fabric include a twill woven fabric in which a composite Japanese paper yarn and a normal yarn are alternately arranged on warps and wefts. As yarns other than composite Japanese paper yarn used for warp, filament yarn, processed yarn, spun yarn, etc., made from existing fibers for textiles, clothing materials for daily necessities, furniture materials for furniture, interior goods, industrial materials And yarns generally used for fabrics are exemplified. Non-composite Washi yarn used for wefts includes filament yarns, processed yarns, spun yarns made of existing fibers for textiles, clothing materials for daily use, furniture materials for furniture, interior goods, industrial materials Examples of yarns generally used for fabrics used in the above. Examples of existing fibers for textile use include, but are not limited to, natural fibers such as hemp, cotton, and silk, synthetic fibers such as polyester, polyamide, and acrylic, and cellulose-based artificial fibers such as rayon.

  By weaving the composite Japanese paper yarn and the yarn other than the composite Japanese paper yarn, a woven fabric having both characteristics can be obtained.

  In the present invention, when the yarn other than the composite Japanese paper yarn that can be used for a part of the warp is woven alone, a woven fabric having a weft weave density coefficient of 35 to 55 can be obtained without impairing normal production efficiency. Thread.

  Since the yarn other than the composite Japanese paper yarn used for the warp generally has an initial tensile modulus equal to or less than that of the composite Japanese paper yarn, in such a case, the Japanese paper yarn fabric of the present invention is such a woven fabric. A Japanese paper yarn woven fabric having a weft weave density coefficient of 35 to 55 is obtained.

  When the Japanese paper yarn woven fabric of the present invention is a woven fabric, the number of composite Japanese paper yarns in the warp is used to make use of the characteristics of Japanese paper in the woven fabric and to relieve the stiff feel peculiar to the fabric using conventional Japanese paper yarn. The ratio is preferably 30% or more. The ratio of the number of composite Japanese paper yarns in the weft is more preferably 30% or more.

  The Japanese paper yarn fabric using the composite Japanese paper yarn of the present invention has a high density, a fine surface and is smooth, and particularly has little deformation due to shear deformation, and is excellent in dimensional stability against external force and durability. In addition, since the initial tensile elastic modulus of the composite Japanese paper yarn of the present invention is smaller than the initial tensile elastic modulus of the conventional Japanese paper yarn, the tensile strength of the fabric (LT value in the KES system) is lower than that of the conventional Japanese paper yarn using fabric. Smaller than that. For this reason, the stiff feel of the traditional Japanese paper thread fabric is alleviated. In addition, the Japanese paper yarn fabric using the composite Japanese paper yarn of the present invention is excellent in water absorption, excellent durability when used in the upper of running shoes, and in the case of an upper using a conventional Japanese paper yarn using fabric Compared to comfort. Moreover, the running shoe using the Japanese paper yarn fabric using the composite Japanese paper yarn of the present invention for the upper has little damage to the foot during continuous running for a long time when worn barefoot. Moreover, the Japanese paper thread fabric of the present invention can be suitably used as an insole for shoes.

  Further, the reinforcing yarn used for the composite Japanese paper yarn of the present invention may be a yarn containing a heat-fusible fiber. The heat-fusible fiber is a fiber made of a polymer that melts by heating, or a fiber that is arranged so that the polymer that melts by heating is exposed on at least a part of the surface of the fiber.

  Examples of the heat-fusible polymer constituting the heat-fusible fiber include thermoplastic resins such as polyester fiber, polyamide fiber, and polyolefin fiber. As the secondary yarn, a yarn containing two types of fibers having different melting points may be used. In this case, by heating the woven fabric at a temperature between the melting points of the two, fibers having a low melting point can function as heat-fusible fibers. In this embodiment, since the fiber having a high melting point is not melted by this heating and the strength is substantially maintained, the strength of the fabric is not greatly impaired by this heating.

  When the heat-fusible fiber is made of one kind of polymer having a melting point of T ° C., the heating temperature H of the woven fabric satisfies T ≦ H ≦ T + 3 ° C. to prevent the strength of the woven fabric from being greatly impaired by this heating. Above, it is preferable.

  Further, the heat-fusible fiber may be a fiber in which two types of resins having different melting points are combined in a core-sheath shape, or a fiber (bicomponent fiber) formed in a bimetallic shape. Also in this embodiment, by heating the fabric at a temperature between the melting points of both, the resin having a high melting point is not melted by this heating, and the strength is substantially maintained, so that the strength of the fabric is greatly impaired by this heating. There is nothing.

  The heat-fusible fiber may be a filament. Staples may be used. When it is a filament, it may be used by mixing with other filaments. Alternatively, it may be used in combination with other yarns or in a twisted manner. In the case of a staple, it may be used by being blended with other fibers.

  The Japanese paper yarn fabric of the present invention using the composite Japanese paper yarn of such an aspect is heat-processed to melt (and then cool) the heat-fusible fiber, so that the heat-fusible fibers are combined in the composite Japanese paper yarn. Fuse. Furthermore, the heat-fusible fiber and Japanese paper may be bonded by an anchor effect. If the reinforcing yarn contains fibers other than the heat-fusible fiber, the heat-fusible fiber is fused to the fiber, or the fibers other than the heat-fusible fiber are bonded to each other via the heat-fusible fiber. To do. As a result, the composite Japanese paper thread becomes stiff. As a result, the Japanese paper yarn fabric becomes stiff and the dimensional stability is improved. As a result, handling during the further processing of the Japanese paper yarn woven fabric, the moving operation, the processing operation, and the like are facilitated.

  The same effect can be obtained also in the Japanese paper yarn knitted fabric using the composite Japanese paper yarn of such an aspect.

  A heat roll may be used as the heat processing means. The surface of the surface may be embossed by embossing with this heat roll.

  The Japanese paper yarn woven fabric or knitted fabric of the present invention including this stiffened composite Japanese paper yarn is made of industrial materials such as filter materials, taking advantage of the feel and moisture absorption and molecular adsorption of Japanese paper, and the touch and appearance of natural products. It can be suitably used for interior materials such as lamp shades and partitioning shielding materials, case materials for storing small items, and the like.

  The Japanese paper yarn woven fabric of the present invention is used for interior articles such as footwear materials for footwear including insole, sandals, slippers, etc., curtain fabrics, wallpaper, upholstery for interior items of moving objects such as furniture and automobiles, and mobile objects. As materials for interior materials, handbags, pouchettes, etc., as materials for bags and surface materials, materials for the storage and storage materials of wallets and card cases and other storage items, and materials for clothing It can be used suitably. These are excellent in hygroscopicity, extremely excellent in dimensional stability and durability, and have a natural, smooth and smooth feel that cannot be obtained with a fabric or cotton fabric made of leather or synthetic fibers. Moreover, these have deodorizing property and are effective in reducing the odor in a room | chamber interior, a vehicle interior, or a store | warehouse | chamber. Further, they can obtain a very smooth surface or a surface provided with special irregularities by press working or the like.

  The Japanese paper yarn fabric of the present invention may be one in which a sheet material such as a fabric or a film-like material is laminated for the purpose of providing additional functions such as reinforcement, decoration, and protection. As the sheet fabric, knitted fabric, woven fabric, leather, artificial leather, film, or the like may be used.

  Further, by using a yarn having a property of imparting a stretch property by thermal contraction as a reinforcing yarn of the composite washi yarn, the stretch property can be imparted to the washi yarn fabric. That is, a fabric obtained by weaving a composite Japanese paper yarn using a yarn having such properties as a reinforcing yarn as a warp and / or weft is subjected to heat shrinkage, for example, by 5 to 15%. Stretch is imparted to the fabric of density. As a yarn having a stretch property by heat shrinkage, a filament yarn composed of a side-by-side type composite fiber of polyethylene terephthalate and polytrimethylene terephthalate (for example, trade name LYCRA T400 fiber manufactured by Toray Operontex Co., Ltd.). Illustrated.

  The yarn having the property of imparting stretchability by heat shrinking is treated with dry heat of 130 ° C. or hot water of 98 ° C. under a load of 0.05 cN / dtex, and thereby the stretch elongation rate ( The value measured according to JIS L 1090) is 40% or more.

  Further, after the composite Japanese paper yarn is subjected to heat shrinkage, the composite Japanese paper yarn is woven using warp and / or weft to give stretchability to the woven fabric using the Japanese paper yarn. The heat shrinkage rate in this heat shrinkage is preferably 5 to 25%. The heat treatment may be, for example, by dyeing yarn. It may be an embodiment in which it is taken up in a basket and treated with hot water.

  Even if the composite Japanese paper yarn is heat-shrinked after weaving, stretchability is imparted to the fabric using the Japanese paper yarn. The heat-shrinked composite washi yarn may be further heat-shrinked after weaving.

  Furthermore, the composite washi yarn of the present invention is a yarn resulting from the above-described yarn tension at the time of lashing against the yarn breakage caused by the yarn tension accompanying the movement of the knitting needle in the knitting process even when applied to a knitted fabric. It works effectively by the effect similar to the mechanism of cutting prevention. In other words, when Japanese paper yarn is applied to the manufacture of knitted fabrics, yarn breakage frequently occurs during knitting and the knitting property is poor, and knitting cannot be performed unless the rotational speed of the knitting machine is lowered. When applied to knitting, the yarn breakage during knitting is reduced and the operation efficiency of the knitting machine is improved. Examples of the knitting include a circular knitting, a flat knitting, a tricot knitting, and a Russell knitting.

  Applying a composite Japanese paper yarn using a yarn with the property of imparting stretchability by heat shrink as a reinforcing yarn to the production of knitted fabrics, the knitting property is further improved compared to the case of using a Japanese paper yarn, such as cotton yarn. A knitted fabric having a knitting density equivalent to that of a normal yarn can be knitted under the same mechanical conditions. Such knitting composite Japanese paper yarn is a heat-shrinkable composite yarn (composite Japanese paper yarn before heat shrinkage) in which a Japanese paper yarn mainly composed of Japanese paper slit in a tape shape and a reinforcing yarn are twisted together. Can be obtained. The heat treatment may be, for example, by dyeing yarn. It may be an embodiment in which it is taken up in a basket and treated with hot water.

  This reinforcing yarn has a maximum stress point elongation of 8% or more, and the tensile force at 3% elongation is 1/20 or more of the tensile strength of this Japanese paper yarn. The fineness of the Japanese paper yarn and the fineness of the reinforcing yarn The ratio is 2: 1 to 15: 1, and the yarn length difference rate between the Japanese paper yarn and the reinforcing yarn in the composite yarn is 1.5 to 12%. In addition, this reinforcing yarn is a yarn having a stretch property imparted by heat shrinkage. Specifically, a filament yarn comprising a side-by-side type composite fiber of polyethylene terephthalate and polytrimethylene terephthalate (for example, Toray Operon Co., Ltd.) The product name LYCRA T400 fiber manufactured by the company is exemplified. The heat shrinkage temperature of the composite yarn is preferably 110 to 150 ° C. The heat shrinkage rate is preferably 5 to 20%.

  The Japanese paper yarn knitted fabric of the present invention obtained in such an embodiment is applied to socks, shoe materials, clothing, and the like, characterized by hygroscopicity and a unique smooth touch. Examples of the knitted fabric of the Japanese paper yarn knitted fabric include a circular knitted fabric, a flat knitted fabric, a tricot knitted fabric, and a Russell knitted fabric. The heat-shrinkable composite Japanese paper yarn may be further heat-shrinked after knitting.

  The tensile force-elongation rate curve, the maximum stress point elongation, and the tensile strength of the samples in the examples were measured using a tensile tester AG-IS10KN manufactured by Shimadzu Corporation at a gripper interval of 200 mm and a tensile speed of 200 mm / min. .

Example 1
Japanese paper made from Japanese paper raw material (15 g / m ² basis weight) was slit into a tape and twisted to obtain 30.5th Japanese paper thread. The twist number of this Japanese paper thread was 430 T / m (Z twist). A 56 dtex, f24 polyester processed yarn (twist number 100 T / m (S twist)) was used as the reinforcing yarn. The maximum stress point elongation of the Japanese paper yarn was 3.7%, the tensile strength was 654 cN, and the initial tensile elastic modulus was 62 cN / dtex. FIG. 2 shows a typical tensile force-elongation rate curve of this Japanese paper thread. The initial tensile elastic modulus of the reinforcing yarn was 95 cN / dtex, the tensile force at 3% elongation was 140 N / dtex, and the maximum stress point elongation was 30%.

  This Japanese paper thread and this reinforcing thread are combined and twisted with an up twister at 900 T / m (S twist), then set with a steam setter at 110 ° C. for 20 minutes, and the 24.4th composite Japanese paper thread is obtained. Obtained.

  The maximum elongation at the stress point of this composite Japanese paper yarn was 10.2%, and the tensile strength was 728 cN. The separable twist coefficient was 182 and the yarn length difference rate was 6.3%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

  FIG. 3 shows a typical tensile force-elongation rate curve of this composite Japanese paper thread. In the tensile force-elongation rate curve, the average slope of the tensile force-elongation rate curve in the elongation range of 6.3% to 9.3% is equal to the average slope of the elongation range of 0% to 6.3%. It was 1.8 times.

Example 2
A hollow bobbin wound with a Japanese paper thread similar to that used in Example 1 is rotated with the axial direction of the bobbin as the rotation axis, and the same reinforcing thread as used in Example 1 passes through the hollow part of the hollow bobbin. As a result, a Japanese paper yarn was continuously wound around the reinforcing yarn to obtain a covering yarn. The number of windings was 550 T / m (S twist). This covering yarn was twisted at 100 T / m (S twist), and set with a steam setter at 110 ° C. for 20 minutes to obtain 24.1th composite Japanese paper yarn. This composite Japanese paper yarn had a maximum stress point elongation of 10.4% and a tensile strength of 790 cN. This composite Japanese paper yarn had a separable twist coefficient of 133, and a yarn length difference rate of 7%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

  FIG. 4 shows a typical tensile force-elongation rate curve of this composite Japanese paper thread. In the tensile force-elongation rate curve, the average gradient of the tensile force-elongation rate curve in the elongation range of 7 to 10% was 2.8 times the average gradient of the elongation region in the elongation rate of 0% to 7%. .

Example 3
Japanese paper made from a Japanese paper raw material (15 g / m ² per unit area) was slit into a tape and twisted to obtain 30th Japanese paper thread. The twist number of this Japanese paper thread was 200 T / m (Z twist). A yarn similar to that used in Example 1 was used as the reinforcing yarn. The maximum stress point elongation of Japanese paper yarn was 2.7%, the tensile strength was 450 cN, and the initial tensile elastic modulus was 60 cN / dtex.

  This Japanese paper yarn and this reinforcing yarn are twisted 550 T / m in the S direction with a ring twisting machine that can supply the twisted region at different speeds, and then twisted and set at 110 ° C. for 20 minutes with a steam setter, 24.8 A composite washi yarn was obtained. At this time, the speed ratio between the reinforcing yarn supplied to the twisting region of the twisting machine and the Japanese paper yarn (the length of the reinforcing yarn supplied to the twisting region per unit time and the Japanese paper yarn supplied to the twisting region per unit time) The ratio of the lengths) was 1: 1.05. This composite Japanese paper yarn had a separable twist coefficient of 111 and a yarn length difference of 5%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

Example 4
Using the composite Japanese paper yarn obtained in Example 1 as the warp and weft, a Japanese paper yarn woven fabric having a warp weave density of 240/10 cm and a weft weave density of 223/10 cm was obtained using a plain weave structure. The weft weave density coefficient was 45. Weaving was carried out normally with almost no warp breakage and without impairing normal production efficiency.

Example 5
Using the composite Japanese paper yarn obtained in Example 2 as the warp and weft, a Japanese paper yarn woven fabric having a warp weave density of 190/10 cm and a weft weave density of 172 yarns / 10 cm was obtained with a plain weave structure. The resulting woven fabric had a weft weave density coefficient of 35. Weaving was carried out normally with almost no warp breakage and without impairing normal production efficiency.

Example 6
A plain weave woven fabric was woven using the composite Japanese paper yarn obtained in Example 1 as the warp and the Japanese paper yarn of the same count as the composite Japanese paper yarn as the weft. This Japanese paper thread is a Japanese paper made from a Japanese paper raw material, slit into a tape shape and twisted, and twisted to a twist number of 390 / m (Z twist). The resulting woven fabric had a weft weave density coefficient of 40. Weaving was carried out normally with almost no warp breakage and without impairing normal production efficiency.

Example 7
Japanese paper made from Japanese paper raw material (weight per unit area 20 g / m ² ) was slit into a tape and twisted to obtain 22nd Japanese paper yarn A. The number of twists of Japanese paper thread A was 340 T / m (Z twist). A 84 dtex polyester processed yarn was used as the reinforcing yarn. The maximum stress point elongation of Japanese paper thread A was 3.7%, the tensile strength was 930 cN, and the initial tensile elastic modulus was 65 cN / dtex. The initial tensile elastic modulus of this reinforcing yarn (A) was 98 cN / dtex, and the tensile force at 3% elongation was 145 N / dtex. The maximum stress point elongation was 32%.

  Washi yarn A and reinforcing yarn (A) are combined and twisted with an up twister at 750 T / m (S twist), then set with a steam setter at 110 ° C. for 20 minutes, and 16.8th composite Japanese paper Yarn A was obtained.

  The composite Japanese paper yarn A had a maximum stress point elongation of 10.5% and a tensile strength of 1080 cN. The separable twist coefficient was 182 and the yarn length difference rate was 6.8%. The composite Japanese paper yarn A had a structure in which the Japanese paper yarn and the reinforcing yarn were twisted together. The average gradient of the tensile force-elongation rate curve in the elongation range of 6.8% to 9.8% in the tensile force-elongation rate curve of the composite Japanese paper thread A is the elongation of 0% to 6.8%. It was 1.5 times the average slope of the area.

Further, a Japanese paper made from a Japanese paper raw material (15 g / m ² per unit area) was slit into a tape shape and twisted to obtain 43rd Japanese paper yarn B. The number of twists of Japanese paper yarn B was 500 T / m (Z twist). A 56 dtex polyester processed yarn similar to that used in Example 1 was used as the reinforcing yarn (B). The maximum stress point elongation of Japanese paper yarn B was 3.6%, the tensile strength was 480 cN, and the initial tensile elastic modulus was 64 cN / dtex.

  Washi yarn B and reinforcing yarn (B) are combined and twisted with an up twister at 800 T / m (S twist), then set with a steam setter at 110 ° C. for 20 minutes, and 31.5th composite Japanese paper Yarn B was obtained.

  The composite Japanese paper yarn B had a maximum stress point elongation of 10.7% and a tensile strength of 510 cN. The separable twist coefficient was 150, and the yarn length difference rate was 7%. Further, the composite washi yarn B had a structure in which the washi yarn and the reinforcing yarn were twisted together. In the tensile force-elongation rate curve, the average slope of the tensile force-elongation rate curve in the elongation range of 7% to 10% is 1.5 times the average gradient of the elongation range of 0% to 7%. It was.

  A woven fabric having the structure shown in FIG. 5 was woven using the composite Japanese paper yarn A as the warp and the composite Japanese paper yarn B as the weft. The resulting woven fabric had a weft weave density of 260 pieces / 10 cm (weft weave density coefficient 46), and the warp weave density was 205 pieces / 10 cm. Weaving was performed normally with almost no warp breakage. Although weaving was attempted for a fabric having a high weft weaving density exceeding 280 weft yarn density / 10 cm, normal operation of the loom was difficult due to warp breakage during hammering.

Example 8
A plain weave fabric was woven using the same composite Japanese paper yarn as the composite Japanese paper yarn A obtained in Example 7 as warp and weft. The weft density of the resulting woven fabric was 180/10 cm (weft weave density coefficient 43), and the warp weave density was 210/10 cm. Weaving was performed normally with almost no warp breakage. In addition, weaving was attempted for a fabric having a high weft weaving density exceeding 205 wefts / 10 cm, but normal operation of the loom was difficult due to warp breakage at the time of hammering.

Example 9
Japanese paper made from Japanese paper raw material (15 g / m ² per unit area) was slit into a tape and twisted to obtain 31st Japanese paper yarn C. The number of twists of Japanese paper thread C was 420 T / m (Z twist). The same 84 dtex polyester processed yarn as that used in Example 7 was used as the reinforcing yarn. The maximum stress point elongation of Japanese paper thread C was 3.7%, the tensile strength was 660 cN, and the initial tensile elastic modulus was 65 cN / dtex.

  Washi yarn C and reinforcing yarn were combined and twisted with an up twister at 850 T / m (S twist), and then set with a steam setter at 110 ° C. for 20 minutes to obtain 23rd composite Washi yarn C. .

  The composite Japanese paper yarn C had a maximum stress point elongation of 10.3% and a tensile strength of 770 cN. The separable twist coefficient was 182 and the yarn length difference rate was 6.8%. In addition, the composite Japanese paper yarn C had a structure in which the Japanese paper yarn and the reinforcing yarn were twisted together. The average gradient of the tensile force-elongation rate curve in the elongation range of 6.8% to 9.8% in the tensile force-elongation rate curve of the composite Japanese paper thread A is the elongation of 0% to 6.8%. It was 1.5 times the average slope of the area.

  A woven fabric having the structure shown in FIG. 5 was woven using the composite Japanese paper yarn C as the warp and the composite Japanese paper yarn B as the weft. The weft density of the obtained woven fabric was 260 pieces / 10 cm (weft weave density coefficient 46), and the weave density of warps was 225 pieces / 10 cm. Weaving was performed normally with almost no warp breakage. Although weaving was attempted for a fabric having a high weft weaving density exceeding 280 weft yarn density / 10 cm, normal operation of the loom was difficult due to warp breakage during hammering.

Example 10
Japanese paper in the same manner as in Example 4 except that a filament yarn (trade name LYCRA T400 fiber manufactured by Toray Operontex Co., Ltd.) 56 dtex made of side-by-side type composite fiber of polyethylene terephthalate and polytrimethylene terephthalate was used as the reinforcing yarn. A yarn fabric was obtained. This fabric was heat-treated at 130 ° C. and 10% width was added to obtain a Japanese paper yarn fabric having elasticity. The stretch rate in the weft direction (based on JIS L 1096 A method) was 9.5%.

Example 11
The composite Japanese paper yarn obtained in Example 1 is used as the warp yarn A and the weft yarn A, and the polyester filament yarn of 167 dtex and f72 (twisting number 110 T / m) is used as the warp yarn B and the weft yarn B. Washi yarn woven fabric with a heavy weaving structure was woven. There was almost no warp breakage during weaving, and normal operation was performed. The weft density of the obtained woven fabric was 290/10 cm (weft weave density coefficient 48), and the weave density of the warp was 280/10 cm. Weaving was performed normally with almost no warp breakage.

Example 12
Japanese paper made from Japanese paper raw material (15 g / m ² basis weight) was slit into a tape and twisted to obtain 41st Japanese paper yarn. The twist number of this Japanese paper yarn was 500 T / m (Z). A 56 dtex, f24 polyester processed yarn (twisting number 100 T / m (S)) was used as the reinforcing yarn. The maximum elongation at the stress point of the Japanese paper yarn was 3.7%, the tensile strength was 480 cN, and the initial tensile elastic modulus was 61 cN / dtex. The initial tensile elastic modulus of the reinforcing yarn was 80 cN / dtex, the tensile force at 3% elongation was 125 N / dtex, and the maximum stress point elongation was 35%.

  This Japanese paper thread and this reinforcing thread are combined, twisted with an up twister at 850 T / m (S twist), and set with a steam setter at 110 ° C. for 20 minutes, and the 31.5th composite Japanese paper thread is obtained. Obtained.

  This composite Japanese paper thread had a maximum stress point elongation of 10.2% and a tensile strength of 560 cN. The separable twist coefficient was 180, and the yarn length difference rate was 6.1%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

  This composite Japanese paper yarn is used as the warp A and the weft A, and 56 dtex, f24 polyester filament yarn (twisting number 1000 T / m (S)) is used as the warp B and the weft B, and the Japanese paper yarn fabric having the structure shown in FIG. 7 is woven. did. There was almost no warp breakage during weaving, and normal operation was performed. The resulting fabric had a weft weave density of 320 yarns / 10 cm (weft weave density coefficient 44), and the warp weave density was 382 yarns / 10 cm. Weaving was performed normally with almost no warp breakage.

Example 13
A composite Japanese paper thread similar to the composite Japanese paper thread A obtained in Example 7 was taken up in a cocoon and the cocoon was treated with hot water at 98 ° C. for 20 minutes to shrink 10%. The processed composite washi yarn was knitted with a sock knitting machine to produce socks for men. Knitting was possible without troubles such as yarn breakage in the same manner as the normal knitting machine conditions for cotton yarn of the same count. The obtained socks had excellent water absorption and a unique smooth feel, and could be used comfortably during long-time use such as for mountain climbing.

Comparative Example 1
A Japanese paper yarn woven with a plain weave structure was woven using the Japanese paper yarn of the same count as the composite Japanese paper yarn obtained in Example 1 as the warp and weft. This Japanese paper thread is a Japanese paper made from a Japanese paper raw material, slit into a tape shape and twisted, and twisted to a twist number of 450 T / m (Z twist). The warp weave density of the obtained woven fabric was 165 pieces / 10 cm, and the weft weave density was 153 pieces / 10 cm (weft weave density coefficient 31). Attempts were made to fabricate fabrics with higher weft yarn density than this, but normal operation of the loom was difficult due to warp breakage at the time of hammering.

Comparative Example 2
Washi made from Japanese paper raw material is slit into a tape shape, combined with the same reinforcing yarn used in Example 1, and twisted at a twist number of 450 T / m (Z twist). A composite yarn having the same count as the composite Japanese paper yarn obtained in Example 1 was obtained. The separable twist coefficient of this composite yarn was 92, and the yarn length difference rate was 0.5%. Using this composite yarn as a warp and a weft, a Japanese paper yarn woven fabric having a warp weave density of 170/10 cm and a weft weave density of 163/10 cm was obtained by a plain weave structure. The weft weave density coefficient was 33. Attempts were made to fabricate fabrics with higher weft yarn density than this, but normal operation of the loom was difficult due to warp breakage at the time of hammering.

Comparative Example 3
A woven fabric having the same structure and the same density as that obtained in Example 1 was prepared using 65% polyester staple and 35% cotton spun yarn having the same number as the composite Japanese paper yarn obtained in Example 1. This woven fabric was subjected to the performance comparison shown in Table 1 together with the woven fabric obtained in Examples and other comparative examples.

Comparative Example 4
Japanese paper made from Japanese paper raw material (20 g / m ² per unit area) was slit into a tape shape and twisted to obtain 25th Japanese paper thread. The twist number of this Japanese paper thread was 540 T / m (Z twist). This Japanese paper thread was twisted and set at 110 ° C. for 20 minutes with a steam setter and then knitted with a sock knitting machine. In knitting similar to the normal knitting cotton yarn knitting machine conditions, yarn breakage occurred frequently, so that the number of revolutions was finally reduced to 1/3 of the normal knitting cotton yarn knitting.

Comparative Example 5
Weaving of the same structure as in Example 11 and the weaving density of Japanese paper yarn woven fabric was performed under the same mechanical conditions as in Example 11 except that Japanese paper yarn was used as the warp A and the weft A. Many warp breaks occurred. This Japanese paper thread is a 24.4th Japanese paper thread obtained by slitting a Japanese paper made from a Japanese paper raw material into a tape and twisting (400 T / m (Z)).

Comparative Example 6
The same structure as in Example 12 except that washi yarn was used as the warp A and the weft A, and the weaving of a Japanese paper yarn woven fabric having a weaving density was tried under the same mechanical conditions as in Example 12. Many warp breaks occurred. This Japanese paper thread is a 31.5th Japanese paper thread obtained by slitting a Japanese paper made from a Japanese paper raw material into a tape shape and twisting (450 T / m (Z)).

Example 14
Japanese paper (15 g / m ² basis weight) made by making a Japanese paper raw material was slit into a tape shape to obtain a 44th untwisted Japanese paper thread. A processed yarn similar to that used in Example 7 was used as the reinforcing yarn. This processed yarn was used after being dyed black. This Japanese paper yarn and this reinforcing yarn were aligned and run in parallel, and twisted 600 T / m in the S direction by a ring twisting machine to obtain a composite Japanese paper yarn. At this time, water was sprayed on the Japanese paper yarn just before the Japanese paper yarn entered the twisting region so that the running Japanese paper yarn was wet before entering the twisting region. The moisture content of the Japanese paper yarn sprayed and collected by reproducing the state before twisting was 50%.

  The obtained composite washi yarn had a maximum stress point elongation of 9.5%, a separable twist coefficient of 110, and a yarn length difference of 3%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

  The obtained composite washi yarn was almost completely covered with the washi yarn, and the presence of the reinforcing yarn was recognized by visual observation of the appearance was about 1 in 5 meters. Further, the portion was such that it appeared to be point-like only when a 10 × magnification lens was used. On the other hand, the composite Japanese paper yarn obtained in the same manner as in Example 1 using the similarly dyed processed yarn as the reinforcing yarn has a location where the presence of the reinforcing yarn is visually recognized as 0.5 meters, one location The portion was of such a length that it could be easily seen without using a magnifying lens.

  Using the obtained composite Japanese paper yarn as warp and weft, a Japanese paper yarn fabric was obtained with a plain weave structure. The weft weave density coefficient was 45. Weaving was carried out normally with almost no warp breakage and without impairing normal production efficiency.

  The obtained composite washi yarn was knitted with a circular knitting machine. There was almost no trouble such as yarn breakage during knitting, and knitting was as efficient as knitting with conventional yarn.

Comparative Example 7
Japanese paper (15 g / m ² basis weight) made by making a Japanese paper raw material was slit into a tape shape to obtain a 44th untwisted Japanese paper thread. A processed yarn similar to that used in Example 7 was used as the reinforcing yarn. This processed yarn was used after being dyed black. This Japanese paper yarn and this reinforcing yarn were aligned and run in parallel, and twisted 600 T / m in the S direction with a ring twisting machine to obtain a composite yarn.

  The yarn length difference rate of this composite yarn was 0.5%. In this composite yarn, the black reinforcing yarn was exposed in the form of a kite string.

  Using this composite yarn as warp and weft, a Japanese paper yarn woven fabric was obtained with a plain weave structure. The weft weave density coefficient was 33. Attempts were made to fabricate fabrics with higher weft yarn density than this, but normal operation of the loom was difficult due to warp breakage at the time of hammering.

Example 15
Japanese paper (15 g / m ² basis weight) made by making a Japanese paper raw material was slit into a tape shape to obtain a 44th untwisted Japanese paper thread. A processed yarn similar to that used in Example 14 was used as the reinforcing yarn. This Japanese paper yarn and this reinforcing yarn were twisted 600 T / m in the S direction with a ring twisting machine capable of supplying the twisted region at different speeds to obtain a composite Japanese paper yarn. At this time, water was sprayed on the Japanese paper yarn just before the Japanese paper yarn entered the twisting region so that the running Japanese paper yarn was wet before entering the twisting region. The moisture content of the Japanese paper yarn sprayed and collected by reproducing the state before twisting was 50%. Speed ratio between the reinforcing yarn supplied to the twisting area of the twisting machine and the Japanese paper thread (the length of the reinforcing yarn supplied to the twisting area per unit time and the length of the Japanese paper thread supplied to the twisting area per unit time) Ratio) was set to 1: 1.05. This composite Japanese paper yarn had a maximum stress point elongation of 10.5%, a separable twist coefficient of 115, and a yarn length difference of 6%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

  The obtained composite Japanese paper yarn is almost completely covered with the Japanese paper yarn, and the presence of the reinforcing yarn is not recognized by visual observation of the appearance. The exposure of the reinforcing yarn was only about one place at 20 meters.

  Using the obtained composite Japanese paper yarn as warp and weft, a Japanese paper yarn fabric was obtained with a plain weave structure. The weft weave density coefficient was 45. Weaving was carried out normally with almost no warp breakage and without impairing normal production efficiency.

  The obtained composite washi yarn was knitted with a circular knitting machine. There was almost no trouble such as yarn breakage during knitting, and the knitting was as efficient as normal cotton yarn.

Example 16
Japanese paper made from Japanese paper raw material (12 g / m ² per unit area) was slit into a tape shape to obtain untwisted 68th Japanese paper yarn. A processed yarn similar to that used in Example 1 was used as the reinforcing yarn. This Japanese paper yarn and this reinforcing yarn were twisted 820 T / m in the S direction with a ring twisting machine capable of supplying the twisted region at different speeds to obtain a composite Japanese paper yarn. At this time, water was sprayed on the Japanese paper yarn just before the Japanese paper yarn entered the twisting region so that the running Japanese paper yarn was wet before entering the twisting region. The moisture content of the Japanese paper yarn sprayed and collected by reproducing the state before twisting was 50%. Speed ratio between the reinforcing yarn supplied to the twisting area of the twisting machine and the Japanese paper thread (the length of the reinforcing yarn supplied to the twisting area per unit time and the length of the Japanese paper thread supplied to the twisting area per unit time) Ratio) was set to 1: 1.05. This composite Japanese paper yarn had a maximum stress point elongation of 10.5%, a separable twist coefficient of 113, and a yarn length difference rate of 6%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

  In the obtained composite washi yarn, the reinforcing yarn was almost completely covered with the washi yarn.

  The obtained composite Japanese paper yarn was knitted with a circular knitting machine. There was almost no trouble such as yarn breakage during knitting, and the knitting was as efficient as normal cotton yarn. A T-shirt using this knitted fabric had a smooth feel and was suitable as a T-shirt to be worn at high temperature and high humidity.

Example 17
Japanese paper (15 g / m ² basis weight) made by making Japanese paper raw material was slit into a tape shape to obtain 32nd untwisted Japanese paper yarn. A processed yarn similar to that used in Example 7 was used as the reinforcing yarn. This Japanese paper yarn and this reinforcing yarn were twisted 420 T / m in the S direction with a ring twisting machine capable of supplying the twisted region at different speeds to obtain a composite Japanese paper yarn. At this time, water was sprayed on the Japanese paper yarn just before the Japanese paper yarn entered the twisting region so that the running Japanese paper yarn was wet before entering the twisting region. The moisture content of the Japanese paper yarn sprayed and collected by reproducing the state before twisting was 50%. Speed ratio between the reinforcing yarn supplied to the twisting area of the twisting machine and the Japanese paper thread (the length of the reinforcing yarn supplied to the twisting area per unit time and the length of the Japanese paper thread supplied to the twisting area per unit time) Ratio) was set to 1: 1.05. This composite Japanese paper yarn had a maximum stress point elongation of 10.5%, a separable twist coefficient of 113, and a yarn length difference rate of 6%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

  In the obtained composite washi yarn, the reinforcing yarn was almost completely covered with the washi yarn.

  The resulting composite Japanese paper thread was used to obtain a Japanese paper thread woven fabric with a mattose structure. The weft weave density coefficient was 45. Weaving was carried out normally with almost no warp breakage and without impairing normal production efficiency. This Japanese paper yarn woven fabric has a smooth feel as a material for an upper of a shoe, a material for an insole, and a material for a bag, and can be suitably used.

Example 18
A Japanese paper (12 g / m ² basis weight) made by making a Japanese paper raw material was slit into a tape shape to obtain a 89th Japanese paper thread with no twist. A 33 dtex polyester processed yarn was used as the reinforcing yarn. This Japanese paper yarn and this reinforcing yarn were twisted at 750 T / m in the S direction with a ring twisting machine capable of supplying the twisted region at different speeds to obtain a composite Japanese paper yarn. At this time, water was sprayed on the Japanese paper yarn just before the Japanese paper yarn entered the twisting region so that the running Japanese paper yarn was wet before entering the twisting region. The moisture content of the Japanese paper yarn sprayed and collected by reproducing the state before twisting was 50%. Speed ratio between the reinforcing yarn supplied to the twisting area of the twisting machine and the Japanese paper thread (the length of the reinforcing yarn supplied to the twisting area per unit time and the length of the Japanese paper thread supplied to the twisting area per unit time) Ratio) was set to 1: 1.05. This composite Japanese paper yarn had a maximum stress point elongation of 10.5%, a separable twist coefficient of 113, and a yarn length difference rate of 6%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together.

  In the obtained composite washi yarn, the reinforcing yarn was almost completely covered with the washi yarn.

  The obtained composite Japanese paper yarn was knitted with a circular knitting machine. There was almost no trouble such as yarn breakage during knitting, and the knitting was as efficient as normal cotton yarn. This knitted fabric was suitable as a knitted fabric for inners or tights having a smooth feel.

Example 19
A composite Japanese paper yarn was obtained in the same manner as in Example 16 except that a processed yarn made of polyester special filament yarn of 54 dtex and f24 (trade name Melset manufactured by Unitika Trading Co., Ltd.) was used as the reinforcing yarn. Melset is a multifilament yarn made of core-sheath fibers using regular polyester as a core material and low-melting polyester as a sheath material. This composite Japanese paper yarn had a maximum elongation at the stress point of 10.3%, a separable twist coefficient of 113, and a yarn length difference rate of 6%. Further, this composite Japanese paper yarn had a structure in which a Japanese paper yarn and a reinforcing yarn were twisted together. In the obtained composite washi yarn, the reinforcing yarn was almost completely covered with the washi yarn. Using the obtained composite Japanese paper yarn as warp and weft, a Japanese paper yarn fabric was obtained with a plain weave structure. The weft weave density coefficient was 45. Weaving was carried out normally with almost no warp breakage and without impairing normal production efficiency.

  The obtained woven fabric was heated at a constant length using a tenter at 190 ° C. for 2 minutes to obtain a fabric. This fabric was stiffer than the fabric before heating set, had a Japanese paper-like feel and appearance, and had good step stability. It was suitable as a material for lampsade.

Running shoes performance comparison Running shoes were prepared using the fabrics obtained in Examples 4 to 6 and Comparative Examples 1 to 3 as uppers, and each monitor (active runner) was worn barefoot and a running test of 100 km was performed. The test results are shown in Table 1.

  The Japanese paper yarn woven fabric and Japanese paper yarn knitted fabric of the present invention make use of durability, natural and smooth unique touch that cannot be obtained with leather or synthetic fabric or cotton fabric, and are used for shoes and daily goods. Widely applied in the fields of materials, furniture materials, interior materials, automotive interior materials, and clothing.

Claims (17)

It is composed of a composite yarn in a state in which a Japanese paper yarn mainly composed of Japanese paper slit in a tape shape and a reinforcing yarn are twisted together with a separable twist coefficient of 70 to 250,
The reinforcing yarn has a maximum stress point elongation of 8% or more, and a tensile force at 3% elongation is 1/20 or more of the tensile strength of the Japanese paper yarn,
The ratio of the fineness of the Japanese paper yarn and the fineness of the reinforcing yarn is 1: 1 to 15: 1;
A composite washi yarn having a yarn length difference rate of 1.5 to 12% between the washi yarn and the reinforcing yarn in the composite yarn. When E is the same value as the yarn length difference rate, the average gradient of the tensile force-elongation rate curve in the elongation range of E to E + 3% in the tensile force-elongation rate curve is 0% to E The composite Japanese paper thread according to claim 1, which is 1 to 2.5 times the average gradient of the stretched area. The composite Japanese paper thread according to claim 1 or 2, wherein the reinforcing thread comprises a heat-fusible fiber. The composite Japanese paper yarn according to claim 1 or 2, wherein the reinforcing yarn is a filament yarn made of a side-by-side type composite fiber of polyethylene terephthalate and polytrimethylene terephthalate. A composite washi yarn obtained by further thermally shrinking the composite washi yarn according to claim 4. A method for producing a composite washi yarn, comprising preparing the composite washi yarn according to claim 5 and thermally shrinking the composite washi yarn. A method for producing a composite Japanese paper thread according to any one of claims 1 to 4,
A step of preparing the Japanese paper yarn having a twist coefficient of 50 to 200,
The Japanese paper yarn having a twist coefficient of 50 to 200 and the reinforcing yarn are aligned and twisted in a direction opposite to the twisting direction of the Japanese paper yarn with a twist number of 1.5 to 3 times the twist number of the Japanese paper yarn. A method for producing a composite Japanese paper thread, comprising the step of: A method for producing a composite Japanese paper thread according to any one of claims 1 to 4,
Preparing the substantially untwisted Japanese paper yarn comprising the Japanese paper slit in the tape shape;
Applying water to the washi yarn to obtain a wet washi yarn,
A method for producing a composite washi yarn, comprising a step of aligning the wet washi yarn and the reinforcing yarn and twisting them with a twist number of 70 to 250. A method for producing a composite Japanese paper thread according to any one of claims 1 to 4,
Preparing the substantially untwisted Japanese paper yarn comprising the Japanese paper slit in the tape shape;
Applying water to the washi yarn to obtain a wet washi yarn,
Manufacture of a composite washi yarn including a step of overfeeding the wet washi yarn to the reinforcing yarn, supplying both to the twisting region of the twisting machine, and twisting with a twist number of 70 to 250 Method. A Japanese paper yarn woven fabric, wherein the composite Japanese paper yarn according to any one of claims 1 to 5 is used as at least a part of a warp, and the number ratio of the composite Japanese paper yarn in the warp is 30% or more. A plain weave or twill weave fabric,
The composite Japanese paper thread according to any one of claims 1 to 5 is used as a warp,
The composite Japanese paper yarn according to any one of claims 1 to 5 is used as a weft,
The Japanese paper yarn fabric according to claim 10, wherein the weft weave density coefficient is 35 to 55. A plain weave or twill weave fabric,
Washi yarn, which consists mainly of Japanese paper slit in a tape shape, is used as a weft,
The composite Japanese paper thread according to any one of claims 1 to 5 is used as a warp,
The Japanese paper yarn fabric according to claim 10, wherein the weft weave density coefficient of the fabric is 35-50. The Japanese paper yarn fabric according to any one of claims 10 to 12, wherein the Japanese paper yarn fabric is a fabric further heat-shrinked, and the composite Japanese paper yarn used in the fabric is the composite Japanese paper yarn according to claim 4. A running shoe using the Washi yarn fabric according to any one of claims 10 to 13 as an upper. A Japanese paper yarn knitted fabric obtained by knitting the composite Japanese paper yarn according to any one of claims 1 to 5.   The Japanese paper yarn fabric according to any one of claims 10 to 12, wherein the reinforcing yarn comprises a heat-fusible fiber, and the heat-fusible fibers are fused to each other in the reinforcing yarn.   The Japanese paper yarn knitted fabric according to claim 15, wherein the reinforcing yarn comprises a heat-fusible fiber, and the heat-fusible fibers are fused to each other in the reinforcing yarn.

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