JP5632984B1 - Crimpable silk thread excellent in gloss, woven / knitted product using the same, and method for producing crimped silk thread - Google Patents

Abstract

[Problem] To provide a crimped silk yarn having a gloss inherent in silk, stretchability and strength, and capable of producing a thin product on a knitting machine or a loom. SOLUTION: A raw yarn or a kneaded strong twisted yarn is used as a core yarn, and a raw yarn or a kneaded yarn untwisted yarn is used as a sheath yarn. A hollow spindle provided with a latch needle drive unit that supports a plurality of latch needles arranged on the circumference and is movable up and down is rotatably mounted on the base, and a plurality of latch needles are rotated while the hollow spindle is rotated. The sheath yarn fed by moving up and down is knitted in a tubular knitted shape on the outer periphery of the core yarn, and the tubular knitted sheath yarn is integrally formed on the outer periphery of the core yarn. [Selection] Figure 4

Description

The present invention relates to a crimped silk yarn excellent in glossiness, in which a cylindrical knitted sheath yarn is integrally formed on the outer periphery of a core yarn.

Conventionally, in order to impart crimpability to the fiber, it has a core-sheath structure in which a polyurethane elastic fiber is arranged in the core yarn and other filament fibers are arranged in the sheath yarn. The fiber is intermittently entangled in the longitudinal direction of the yarn with a soluble fiber interposed between them, and has a loop on the surface of the yarn. There is a method (Patent Document 1) for forming a gap between the two.

However, silk yarn is light, soft and has a natural luster, and has excellent properties not found in synthetic fibers. However, since silk yarn has poor stretchability, it has been difficult to provide crimpability.

For this reason, a covering yarn is produced by winding a plurality of layers of a sheath yarn in which a plurality of raw yarns are twisted on a water-soluble fiber serving as a core yarn in a spiral shape, and then the covering yarn is used for the water-soluble fiber. By scouring or dyeing at a temperature higher than the melting temperature, the water-soluble fiber used as the core yarn is dissolved, and a plurality of spiral layers of the silk yarn are wound into a hollow shape to form a hollow shape. There is a method (Patent Document 2) for producing a silk thread with winding directions opposite to each other. However, the silk-processed yarn formed by dissolving the water-soluble fiber used as the core yarn and having a hollow shape has a problem that the strength is small because there is no core yarn.

JP 2012-41647 A JP 2000-234231 A

The present invention provides a crimped silk thread that improves the above-mentioned problems, has a gloss inherent in silk, has stretchability and strength, and can be used to produce a thin product on a knitting machine or a loom, and a method for producing the same. To do.

The crimped silk thread excellent in gloss according to claim 1 of the present invention is obtained by using a raw yarn or a kneaded high-strength yarn as a core yarn and using a raw yarn or a kneaded non-twisted yarn as a sheath yarn. A cylindrical knitted sheath yarn is integrally formed on the outer periphery of the sleeve.

The crimped silk thread excellent in gloss according to claim 2 of the present invention is the crimped silk thread according to claim 1, wherein the core yarn used has a mean twist thickness of 10 to 64 denier and no sheath yarn. The thickness of the twisted yarn is characterized in that the average thickness is 10 to 32 denier and the cutting strength is 250 (gf) or more.

The woven or knitted product according to claim 3 of the present invention uses a raw twisted yarn or a twisted twisted yarn as a core yarn, and uses a raw yarn or a twisted untwisted yarn as a sheath yarn. It is characterized by using a crimped silk thread excellent in glossiness, which is formed by integrally forming a sheath thread.

According to a fourth aspect of the present invention, there is provided a method for producing a crimped silk thread excellent in glossiness, wherein a raw yarn or a kneaded yarn is used as a core yarn, and a raw yarn or a kneaded yarn is used as a sheath yarn. A hollow spindle provided with a latch needle drive unit that supports a plurality of latch needles arranged on the circumference and supported so as to be movable up and down on the outer periphery of a cylindrical body through which the core yarn is continuously fed and passed. The sheath thread fed by rotating a plurality of latch needles up and down while rotating the hollow spindle is knitted into a tubular knitted shape on the outer periphery of the core yarn, and the cylindrical knitted shape is formed on the outer periphery of the core yarn. The sheath yarn is formed integrally.

The method for producing a crimped silk thread excellent in gloss according to claim 5 of the present invention is characterized in that 2 to 6 latch needles are arranged on the circumference of the outer periphery of the hollow spindle in claim 4. It is what.

According to the crimped silk yarn excellent in gloss according to claim 1 of the present invention, a raw yarn or a kneaded high-strength yarn is used as a core yarn, and a raw yarn or a kneaded yarn is used as a sheath yarn. By forming a cylindrical knitted sheath yarn integrally on the outer periphery of the core yarn, it is possible to obtain a crimped silk yarn having the inherent glossiness of silk and having stretch properties and strength.

Further, according to the crimpable silk thread excellent in glossiness according to claim 2, stretchability can be obtained by defining the thickness of the strong twist yarn of the core yarn to be used, the thickness of the untwisted yarn of the sheath yarn, and the cutting strength. It is strong and can produce thin fabrics on knitting machines and looms.

Further, according to the woven or knitted product of claim 3, since the crimped silk thread having excellent glossiness in which the cylindrical knitted sheath yarn is integrally formed on the outer periphery of the core yarn, the original glossiness of the silk is obtained. It is possible to obtain a thin woven or knitted product having stretchability and strength.

According to the method for producing a crimped silk thread excellent in glossiness according to claim 4, a plurality of latch needles are provided on the circumference on the outer circumference of the cylindrical body through which the core yarn is continuously fed. A hollow spindle provided with a latch needle driving part that is arranged and supported so as to be movable up and down is rotatably mounted on the base part, and a sheath thread fed by feeding a plurality of latch needles up and down while rotating the hollow spindle is fed. By knitting the outer periphery of the core yarn in a tubular knitted shape, a tubular knitted sheath yarn can be integrally formed on the outer periphery of the core yarn.

According to the method for producing a crimped silk thread excellent in glossiness according to claim 5, by arranging 2 to 6 latch needles on the circumference of the outer circumference of the hollow spindle, the outer circumference of the core thread is uniform. A cylindrical knitted sheath yarn can be formed integrally.

As shown in FIG. 1, the crimped silk yarn excellent in glossiness of the present invention uses a raw twisted yarn or a twisted twisted yarn obtained by scouring raw yarn as the core yarn 12, and a sheath yarn 13 as a raw yarn or a twisted untwisted yarn. Is used, and a tubular knitted sheath yarn 13 is integrally formed on the outer periphery of the core yarn 12. In the present invention, a raw twisted yarn or a kneaded strong twisted yarn used as the core yarn has a twist number condition of 900 (T / m) or more. The sheath yarn of the present invention uses a raw yarn or a kneaded yarn. The reason for this is that if a strong twisted yarn is used as the sheath yarn, the stretchability is increased, but the glossiness is impaired. Therefore, the original gloss of silk can be maintained by using a non-twisted yarn.

Moreover, it is desirable to use a core yarn having a mean twist of 10 to 64 denier and a sheath yarn having an average thickness of 10 to 32 denier. In the present invention, by defining the thicknesses of the core yarn and the sheath yarn within the above range, the woven fabric and the knitted product can be formed with thin fabric. If the core yarn is less than 10 denier and the sheath yarn is less than 10 denier, the fiber strength is weak and the product is not durable. If the core yarn exceeds 64 denier, or the sheath yarn exceeds 32 denier, it becomes thick. There is a drawback that it is drooped by the weight of the material.

In addition, if there is no core yarn and only a tubular knitted sheath yarn, the Young's modulus is high and the strength is low, and the yarn does not stretch even on a knitting machine and is weak, so it cannot be cut and knitted. By inserting the core yarn of strong twist yarn, it becomes a yarn that can be used in a knitting machine.

Furthermore, the Young's modulus is obtained by forming a tubular knitted sheath yarn integrally on the outer periphery of the core yarn using a strong twisted yarn of the thickness specified for the core yarn and using a non-twisted yarn of the thickness specified for the sheath yarn. When the elongation is less than 9.5 (gf / d), the elongation is 200% (gf / d), 6.5% or more, and the cutting strength is 250 (gf) or more, a thin product can be produced by a knitting machine or a loom. A crimped silk thread excellent in gloss is obtained.

In this way, by using a crimped silk thread excellent in luster formed integrally with a cylindrical knitted sheath thread on the outer periphery of the core thread, it has the original luster of silk, and has a stretchy and strong thin fabric. Textile and knitted products can be obtained.

Next, a method for producing the crimped silk yarn of the present invention will be described. FIG. 2 shows a processing machine according to the present invention, wherein 1 is a processing machine main body, 2 is a base that is rotatably provided at the center of the processing machine main body 1, and 3 is integrated with the base 2 at the center. It is a hollow spindle that rotates in a straight line. The hollow spindle 3 has a plurality of guide grooves 4 formed in the vertical direction on the outer periphery of a cylindrical body 5, and provided with a latch needle driving unit 11 on which latch needles 6 a and 6 b are supported so as to be movable up and down. The latch needles 6a and 6b are attached to the two guide grooves 4 to be movable up and down.

As shown in FIG. 3, the latch needles 6a and 6b have a hook 8 formed on the upper portion of the stem 7, and a latch 10 supported by a shaft 9 is attached to the lower portion thereof so as to be rotatable up and down. is there. The latch needles 6a and 6b rotate in the guide groove 4 while being sequentially raised and lowered by the cam mechanism.

Next, a method for producing crimped silk yarn with the processing machine having the above-described configuration will be described. First, as shown in FIG. 4, the core yarn 12 and the untwisted yarn sheath yarn 13 wound around a yarn feeding bobbin (not shown) are drawn from the upper portion of the hollow spindle 3 and inserted into the inner side from the upper portion of the hollow spindle 3. Next, after the sheath thread 13 is hooked on the hook 8 of one latch needle 6a, the motor is driven to rotate the hollow spindle 3 integrated with the base portion 2. As the hollow spindle 3 rotates, the latch needles 6a and 6b attached in the guide groove 4 formed on the outer periphery thereof alternately move up and down.

The state during the processing will be described in more detail. The core yarn 12 is fed from the top to the bottom of the rotating hollow spindle 3 and wound around a winding bobbin (not shown). One latch needle 6a has a pre-made stitch loop 15a formed on the lower side thereof. The sheath thread 13 fed out from the yarn feeding bobbin descends by being hooked on the tip hook 8 of the stem 7 at a position where one latch needle 6a is raised as shown in FIG.

Further, when the hollow spindle 3 is rotated as shown in FIG. 5, the latch needle 6a is also lowered while rotating. At this time, the existing stitch loop 15a already knitted in the previous processing step is removed. Since it is formed in the stem 7 below 10, the latch needle 6a descends inside this. In this process, as shown in FIG. 8 (B), the hook 10 is rotated upward to contact the stitch loop 15a, the hook 8 is closed, and the sheath yarn 13c is lowered with the stitch loop 15b newly formed. To do.

Further, when the hollow spindle 3 is rotated as shown in FIG. 6, the latch needle 6a is also rotated and lowered to the lowest position, and the existing stitch loop 15a is hooked at the tip as shown in FIG. 8C. 8 is pulled out to the hollow spindle 3 side. At this time, a stitch loop 15b is formed on the hook 8 of the latch needle 6a.

Further, when the hollow spindle 3 is rotated as shown in FIG. 7, the latch needle 6a is also rotated along with this, and this time, it starts to rise. At this time, as shown in FIG. 8 (D), when the latch needle 6a passes through the newly formed stitch loop 15b, the latch 10 comes into contact with the stitch loop 15b and is rotated downward to be opened. Thereafter, returning to the state of FIG. 8A, the same operation is repeated. The other latch needle 6b arranged opposite to the latch needle 6a repeats the vertical movement opposite to that of the latch needle 6a, and the crimping property is obtained by integrally forming a tubular knitted sheath yarn 13 on the outer periphery of the core yarn 12. The silk thread is wound on the winding bobbin.

Example 1
Examples of the present invention will be described below. A strong twisted yarn having an average thickness of 14 denier and a twist number of 2500 (T / m) was used as the core yarn, and an untwisted yarn having an average thickness of 14 denier was used as the sheath yarn. Also, the two latch needles were machined with a hollow spindle attached, and the test conditions were JIS 1013.8.5.1 tensile strength and elongation rate, standard time test, constant speed tension system, gripping interval 250 mm. The crimped silk yarn thus obtained was measured for Young's modulus and elongation, cutting strength, and gloss. As a result, the Young's modulus was 2.6 (gf / d), the elongation was 12.1% at 200 (gf / d), the cutting strength was 267.4 (gf), and the gloss was good.

(Example 2)
A strong twisted yarn having an average thickness of 21 denier and a twist number of 2500 (T / m) was used as the core yarn, and an untwisted yarn having an average thickness of 14 denier was used as the sheath yarn. The latch needles were machined by a hollow spindle 3 with two attached. As a result, the Young's modulus was 3.7 (gf / d), the elongation was 14.1%, the cutting strength was 289.5 (gf), and the glossiness was good.

Example 3
In Example 2, a strong twisted yarn having a twist number of 2500 (T / m) and an average thickness of 28 denier was used as the core yarn, and the other processing was performed under the same conditions. As a result of measuring the obtained silk thread, the Young's modulus was 4.0 (gf / d), the elongation was 11.0%, the cutting strength was 294.5 (gf), and the glossiness was good.

Example 4
As the core yarn, a strong twisted yarn having an average thickness of 28 (T / m) and an average thickness of 28 denier was used, and as the sheath yarn, an untwisted yarn having an average thickness of 21 denier was used. The latch needles were processed with a hollow spindle with two attached. As a result of measuring the obtained silk thread, the Young's modulus was 3.0 (gf / d), the elongation was 10.4%, the cutting strength was 274.9 (gf), and the glossiness was good.

(Example 5)
A strong twisted yarn having an average thickness of 28 denier with a twist number of 2500 (T / m) was used as the core yarn, and a non-twisted yarn having an average thickness of 28 denier was used as the sheath yarn. The latch needles were processed with a hollow spindle with two attached. As a result of measuring the obtained silk thread, the Young's modulus was 5.9 (gf / d), the elongation was 13.4%, the cutting strength was 462.5 (gf), and the glossiness was good.

(Example 6)
In Example 3, machining was performed with a hollow spindle having four latch needles attached thereto, and the others were machined under the same conditions. As a result of measuring the obtained silk thread, the Young's modulus was 4.8 (gf / d), the elongation was 6.8%, the cut strength was 311.7 (gf), and the glossiness was good.

(Comparative Example 1)
The core yarn was not used, but only a non-twisted sheath yarn having an average thickness of 14 denier was used, and processing was performed with a hollow spindle 3 to which two latch needles were attached. As a result, the Young's modulus was 12.9 (gf / d), the elongation was 13.0%, the cutting strength was 194.9 (gf), and the cutting strength was low.

(Comparative Example 2)
Both the core yarn and the sheath yarn were processed with a hollow spindle equipped with two latch needles using untwisted yarn having an average thickness of 14 denier. As a result, the Young's modulus was 12.7 (gf / d), the elongation was 8.9%, the cutting strength was 236.2 (gf), and the gloss was good.

(Comparative Example 3)
An untwisted yarn having an average thickness of 21 denier was used as the core yarn, an untwisted yarn having an average thickness of 14 denier was used as the sheath yarn, and the core yarn was processed with a hollow spindle having two latch needles attached thereto. As a result, the Young's modulus was 16.4 (gf / d), the Young's modulus was high, the elongation was 8.0%, and the cutting strength was 269.5 (gf).

(Comparative Example 4)
A hollow spindle that uses eight twisted needles using a twisted yarn of 2500 (T / m) and a twisted yarn with an average thickness of 28 denier as a core yarn, and a sheath yarn of an untwisted yarn with an average thickness of 14 denier. It was processed with. As a result, the Young's modulus is 9.2 (gf / d), the elongation is 3.9%, the core yarn is thick, and the number of latch needles is large, so the elongation is extremely low and the crimpability is poor. there were.

(Comparative Example 5)
As the core yarn, a strong twisted yarn with an average thickness of 2500 (T / m) and a denier of 21 denier is used, and as the sheath yarn, a twisted yarn with an average thickness of 2500 (T / m) and an average thickness of 14 denier is used. A hollow spindle equipped with two latch needles was used for processing. As a result, the Young's modulus was 1.8 (gf / d), the elongation was 13.0%, and the cutting strength was 293.9 (gf). This is a high strength because a strong twisted yarn is used for the sheath yarn, but the crimpability is poor and the glossiness is poor. The results of these examples and comparative examples are shown in Table 1.

From the results of Table 1, when Examples 1-4 in which the core yarn is inserted and Comparative Example 1 without the core yarn are compared, the Young's modulus is high and the strength is low when there is no core yarn. . In this case, the yarn cannot be cut and knitted because the yarn does not stretch and is weak. It can also be used for knitting machines by inserting a core yarn. Moreover, when Examples 1-4 using the strong twisted yarn for this core yarn and Comparative Examples 2-3 using the untwisted yarn are compared, when the untwisted yarn is used, the Young's modulus is high and the strength is small, and the stretchability is lowered. doing. Further, Comparative Example 5 using a strong twisted yarn for both the core yarn and the sheath yarn has high strength, but the original gloss of silk is poor.

FIG. 9 shows another embodiment of the present invention, in which four latch needles 6a to 6d are attached to the guide groove 4, and a tubular knitted sheath yarn 13 is integrally formed on the outer periphery of the core yarn 12. Is.

It is a side view which expands and shows the crimpable silk thread by one Embodiment of this invention. It is a perspective view of the processing machine which attached the hollow spindle provided with the latch needle drive part to the base part. It is a front view which shows a latch needle. (A)-(D) are explanatory drawings which show operation | movement of a latch needle. It is explanatory drawing which shows operation | movement of a latch needle. It is explanatory drawing which shows operation | movement of a latch needle. It is explanatory drawing which shows operation | movement of a latch needle. It is explanatory drawing which shows operation | movement of a latch needle. It is a perspective view which shows the processing machine which attached four latch needles by other embodiment from which this invention differs.

1 Processing machine body
2 Base part
3 Hollow spindle
4 Guide groove
5 Cylinder 6 Latch
7 Stem 8 Hook 9 Shaft 10
11 Latch needle drive
12 Core yarn
13 sheath thread
15 stitch loop

Claims (5)

A core knitted sheath yarn is integrally formed on the outer periphery of the core yarn by using a raw yarn or a kneaded strong twisted yarn as the core yarn, and using a raw yarn or a kneaded untwisted yarn as the sheath yarn. A crimped silk thread with excellent gloss. The thickness of the strong twisted yarn of the core yarn used is 10 to 64 deniers in average thickness, the thickness of the untwisted yarn of the sheath yarn is 10 to 32 deniers in average thickness, and the cutting strength is 250 (gf) or more. The glossy crimpable silk according to claim 1, wherein: Uses raw twisted or twisted strong twisted yarn as the core yarn, raw yarn or kneaded non-twisted yarn as the sheath yarn, and a cylindrical knitted sheath yarn formed integrally around the core yarn. Woven and knitted products characterized by using crimped silk. Using a raw yarn or a kneaded strong twisted yarn as the core yarn, and using a raw yarn or a kneaded untwisted yarn as the sheath yarn, the core yarn is continuously fed and passed through the outer circumference of the cylindrical body. A hollow spindle equipped with a latch needle drive unit that supports the latch needle on the circumference and can be moved up and down is rotatably mounted on the base, and multiple latch needles are moved up and down while rotating the hollow spindle. A method for producing a glossy crimped silk yarn, wherein the sheath yarn fed in this way is knitted in a tubular knitted shape on the outer periphery of the core yarn, and the tubular knitted sheath yarn is integrally formed on the outer periphery of the core yarn . The method for producing a glossy crimpable silk yarn according to claim 4, wherein 2 to 6 latch needles are arranged on the circumference of the outer periphery of the hollow spindle.