JPS62149933A - Production of fancy yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing fancy yarn having intermittent knots in the longitudinal direction of the yarn.

(Conventional technology) Conventionally, the method of producing fancy yarns having knots by false twisting is to use two or more filament yarns, and to twist the filament yarns to be used as core yarns in a false-twisting heating area. , the other filament yarn to be used as the sheath yarn is supplied in a larger amount than the filament yarn to be used as the core yarn, and the filament yarn to be used as the sheath yarn is supplied as the core yarn while changing the feeding tension. Alternatively, the filament yarn to be used as a core yarn may be twisted in a false twisting heating area to form a sheath yarn. There is a known method of actively changing the position of the yarn feeding guide of the filament yarn and winding it around the filament yarn to be used as the core yarn, thereby alternately forming a heavy liquid winding part and a triple winding part. There is.

(Problem to be Solved by the Invention) However, the former method among the above-mentioned conventional techniques utilizes the difference in tension fluctuation caused by winding the filament yarn to be used as the sheath yarn, and therefore, the problem occurs at one node. There is a problem that the spacing between the triple winding parts becomes a monotonous pattern, resulting in a lack of fancy effects, and the latter method requires actively changing the position of the yarn feeding guide, which only increases the complexity of the device. However, there were problems such as lack of durability of the guide.

The present invention solves the problems of the conventional method, and its purpose is to produce a fancy yarn with random spacing between two knots and a rich variety of yarns using a simple device and a simple operation. It is an object of the present invention to provide a method for manufacturing fancy yarn that can be manufactured and can be manufactured at high speed.

(Means for Solving the Problems) That is, one aspect of the present invention is to wind a sheath yarn and a filament yarn that is to be a core yarn around a filament yarn that is to be twisted by a twisting body to form a core yarn in the longitudinal direction of the yarn. When manufacturing a fancy yarn having knots intermittently, a fluid is intermittently jetted from a fluid jet nozzle provided between a feed roller and a twisting body that supplies the filament yarn to be the core yarn. The gist of this invention is a method for manufacturing fancy yarn, characterized in that the joining point of the filament yarn to be the core yarn and the filament yarn to be the sheath yarn is shifted (J)J.

The present invention will be explained in detail below.

FIG. 1 is a process schematic diagram showing an example of the method for manufacturing fancy yarn of the present invention. In FIG.

The filament yarn F+ to be used as the core yarn is supplied from the first feed roller 1 and twisted by the false twisting body 5 between the first feed roller 1 and the delivery roller 6 while being twisted by the heater 4.
The film is heat-fixed and reaches the delivery roller 6. On the other hand, the filament yarn F2 to be made into a sheath yarn passes from the second feed roller 3 to the yarn feeding guide G and joins the filament yarn F1 in the false twisting heating area between the feed roller 1 and the false twisting body 5. Set to merge at or near position P. A fluid injection nozzle 2 such as an air injection nozzle is provided between the merging point P and the first feed roller 1, and compressed air is injected from the fluid injection nozzle 2 toward the first merging point P.

The jet flow collides with the filament yarn F2 near the confluence point P, so that the confluence point P moves to Q.

As will be described in detail later, here, the filament yarn F2
If you overfeed the filament thread F,
A single winding part is formed in which filament yarn F+ is used as a core yarn and filament yarn F2 is wound around it as a sheath yarn.
Next, the filament yarn Fl+ running in this state
When compressed air is injected from the fluid injection nozzle 2 at Ft, the first confluence point P moves to the position Q, and at this time, a double winding part is formed and the first injection of compressed air from the fluid injection nozzle 2 is caused. When stopped, the filament yarn F2 returns from the position Q to the position P while winding around the former double-wound part, forming a node consisting of the triple-wound part. In this way, as shown in FIG.
A fancy yarn is obtained in which triple winding parts B and triple winding parts B are formed alternately.

Here, it is preferable to use an electromagnetic valve as a means for controlling injection and stop of injection of compressed fluid from the fluid injection nozzle, and the operation of the electromagnetic valve is controlled by, for example, a random pulse generator, a microcomputer, or the like.

In addition, the length of the triple winding portion, that is, the knot portion, is determined by the pressure of the compressed fluid jetted from the fluid jet nozzle and the length of the filament yarn F.
It can be set appropriately by combining the two yarn feeding tensions, etc., and the moving distance is thereby controlled. Although the pressure of the fluid jet nozzle depends on the yarn feeding tension of the filament yarn F2, a pressure of 4 kg/cJ or more is usually sufficient. Moreover, it is preferable that the movement distance of one confluence point P is about 2 to 15 cm; if it is too long, there is a risk that the shape retention of the knots of the obtained fancy yarn will deteriorate.

Further, the frequency of appearance of the first knot portion is controlled by appropriately selecting the fluid injection time and the injection stop time at arbitrary intervals.

In addition to the nozzle shown in FIG. 1, a Taslan nozzle or the like can be used as the fluid injection nozzle. When using a Taslan nozzle, the Taslan nozzle is provided between the first feed roller and the confluence point of the above two filament yarns, and the filament yarn supplied from the first feed roller to be the core yarn is inserted through the Taslan nozzle. The fluid may be injected from the nozzle toward the confluence point. The point is.

Any fluid injection nozzle may be used as long as it can spray fluid onto the filament yarn to be used as the sheath yarn to move the confluence point.

Further, as the fluid, in addition to gas such as air, liquid or the like can be used.

Although FIG. 1 above shows an example in which a heater for heat setting is used, the heater may not be used, and in this case, a non-crimped fancy yarn having no false twist crimp can be obtained. The filament yarn used in the present invention may be either thermoplastic or non-thermoplastic.

(Function) In the present invention, when the filament yarn to be the core yarn which is being twisted by the twisting body is merged with the filament yarn to be the sheath yarn in an overfeed state, the filament yarn to be the core yarn is A filament yarn to be used as a sheath yarn is wound around the periphery to form a single-wound portion. Next, when a fluid is injected onto the yarn running in this state, the filament yarn to be used as the sheath yarn instantly moves downstream due to the action of the jet, and at this point a double winding portion is formed. Next, when the jet of fluid is stopped, the sheath thread and the filament thread to be replaced are released from the action of the jet flow and return to their original confluence point, while further winding around the previous double winding part to form a triple winding part. is formed.

By repeating this series of operations, single-wound portions and triple-wound portions are alternately formed in the longitudinal direction of the yarn.

(Example) Next, two embodiments of the present invention will be specifically explained using examples.

Example 1 A polyethylene terephthalate multifilament yarn 75d/36f was used as the filament yarn F1, a polyethylene terephthalate multifilament yarn 5Qd/24f was used as the filament yarn F2, and a false twisting spindle was used as the false twisted body. Fancy yarn was manufactured according to the steps shown in Table 1 under the conditions shown in Table 1.

The feeding tension of the filament yarn F2 is 1 g on average.

The moving distance of the confluence point was approximately 3 cm.

Table 1 The fancy yarn thus obtained had a length of one knot of about 3 cm, an average number of knots of 120/100 m, and random spacing.

When plain woven fabrics and tubular knitted fabrics were produced using this fancy yarn, both had no periodicity and a random, natural surface appearance.

Example 2 Using polyethylene terephthalate multifilament yarn 50d/24f as filament yarn F and rayon yarn 75d/30f as filament yarn F2, the heater was not heated in the process shown in FIG. Using an air swirl nozzle, the air pressure is increased to 3
kg/cnT, and the other conditions were the same as in Example 1 to produce the fancy yarn of the present invention.

The obtained fancy yarn had randomly spaced knots like the fancy yarn of Example 1.

When plain woven fabrics and tubular knitted fabrics were manufactured using this fancy yarn, the nine knots did not shift during the weaving and weaving process, and good workability was demonstrated.

Both the obtained plain woven fabric and tubular knitted fabric had a silk-like luster and a shantung-like appearance and texture.

(Effects of the Invention) As described below, the method of the present invention involves intermittently injecting fluid from a fluid jet nozzle when winding a filament yarn to be used as a core yarn and a filament yarn to be used as a sheath yarn. Since the confluence point of both yarns is moved, the sheath yarn is wound around the core yarn while changing the fluid jetting time or jetting stop time at arbitrary intervals to create a fancy yarn with a random length between two knots. can be manufactured. Further, the method of the present invention is performed by appropriately selecting the injection time and injection stop time of the fluid to be ejected from the fluid injection nozzle at arbitrary intervals.

It is an extremely versatile and versatile method for producing fancy yarns, as the form of the two-knot portions and the number per unit length can be easily controlled in accordance with the desired appearance and texture. Furthermore, there is an advantage that the fancy yarn as described above can be manufactured using simple equipment and simple operations, and can be manufactured at high speed.

[Brief explanation of drawings]

FIG. 1 is a schematic process diagram showing an example of the method for manufacturing fancy yarn of the present invention, and FIG. 2 is a schematic diagram showing an example of the thread form of the fancy yarn obtained by the present invention. F, -------Filament yarn F that should be a single core yarn
z ”'---Filament yarn to be used as sheath yarn■ −・
- First feed roller 2 ------- Fluid injection nozzle 3 - Second feed roller 5 ---- One twisted body 6 ---- Pre-heli rollers P, Q ---- Confluence point

Claims (1)

[Claims] (1) Fancy yarn having knots intermittently in the longitudinal direction of the yarn is produced by winding the filament yarn to be the sheath yarn around the filament yarn to be the core yarn which is being twisted by the twisting body. In this process, fluid is intermittently jetted from a fluid jet nozzle provided between the feed roller and the twisting body that supplies the filament yarn to be used as the core yarn, and the filament yarn to be used as the core yarn and the sheath yarn are A method for producing fancy yarn, which is characterized by moving the point of confluence with the filament yarn.