JPS6312731A - Nep type composite processed yarn and its production - 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 nep-type composite processed yarn and a method for producing the same, particularly a nep-type composite yarn that has a warm feel even though filament yarn is used as the raw yarn. The present invention relates to a composite textured yarn and a method for manufacturing the same.

[Prior art]

Conventionally, in the field of spun yarn, development of NEP yarn has progressed, but it cannot be said that development of NEP type processed yarn using filament yarn as the raw yarn has progressed at all.

[Purpose of the invention]

The object of the present invention is to have no practical problems in weaving properties, to have a soft surface touch, and to have good tension, firmness and resilience, and to be able to use filament yarn as a raw yarn when fabricated. The surface is soft and warm to the touch,
To provide a nep-type composite processed yarn that is free from fluff and has a natural appearance with a nep and heather feel, and a method for producing the same.

[Structure of the invention]

That is, the nep type composite textured yarn of the present invention is a core-sheath type composite textured yarn consisting of multi-filament yarns having false twist crimp, and includes a core yarn and a sheath yarn. There is a yarn length difference of 10 to 25% between
It is characterized by having 0 pieces/10m.

On the other hand, in the method for producing a nep type composite textured yarn of the present invention, a temperature of 80° C. lower than the melting point of the supply system is provided between at least two sets of first supply rollers and a second supply roller disposed downstream thereof. False twisting processing using at least two feed systems that are supplied with a feed difference of 5 to 30% by arranging a heater heated to a temperature between the above melting point and a false twisting device having a yarn feeding function. Then, the obtained false twisted yarn was passed through an interlacing nozzle having a fluid jet angle of 60 to 85 degrees in the direction of its movement to perform an interlacing process, and then additional twisting was performed. It is characterized by

As mentioned above, the nep type composite textured yarn of the present invention is
A core-sheath type composite processed yarn consisting of multifilament yarns having false twist crimp, the yarn length difference between the yarn serving as the core portion and the yarn serving as the sheath portion being 10 to 25%, and The twist density is LOOT/m or more, the number of intertwining points is 50 or more/m, and the number of neps is 1 to 2.
0 per 10m, the surface touch of the yarn itself is soft, and it has good tension, stiffness, and anti-1a properties.Furthermore, when it is made into a woven fabric, it has a soft surface touch even though filament yarn is used as the raw yarn. is soft and warm, and
It is not flaky and has a natural appearance with a nappy and heather feel.

In particular, since the composite textured yarn of the present invention has 50 or more intertwining points/m and a twist density of 100 T/m or more, there is no problem in weavability in practical terms.

The yarn length difference between the core yarn and the sheath yarn is 10 to 2.
5% is desirable; if the yarn length difference between the core yarn and the sheath yarn is less than 10%, it will be difficult to obtain a good core-sheath composite textured yarn, and it will exceed 25%. , the occurrence of excessive NEP increases.

It is desirable that the number of intertwined points is 50 or more per meter; if the number of intertwined points is less than 50, the core/sheath yarn lid structure becomes unstable.

Furthermore, the number of neps is preferably 1 to 20 per 10 m; if the number is more than that, the neps will be too noticeable and the natural appearance will be impaired when it is made into a textile.

Furthermore, if a thick single yarn is used as the core yarn and a thin single yarn is used as the sheath yarn, a yarn with a soft surface touch, tension, stiffness, and anti-1a properties can be obtained.

On the other hand, in the method for producing a nep type composite textured yarn of the present invention, a temperature of 80° C. lower than the melting point of the supply system is provided between at least two sets of first supply rollers and a second supply roller disposed downstream thereof. False twisting processing using at least two feed systems that are supplied with a feed difference of 5 to 30% by arranging a heater heated to a temperature between the above melting point and a false twisting device having a yarn feeding function. Then, the obtained false twisted yarn was passed through an interlacing nozzle having a fluid jet angle of 60 to 85 degrees in the direction of its movement to perform an interlacing process, and then additional twisting was performed. , it becomes possible to efficiently produce the above-mentioned nep type composite textured yarn.

In particular, the temperature of the heater for heat fixing must be 8° below the melting point of the supply system.
Since the temperature is between 0° C. lower and the above melting point, and is not higher than necessary, it is possible to suppress fusion between single fibers, and a nep type composite processed yarn with a soft surface touch can be obtained.

Moreover, the power consumption of the heat fixing heater can be reduced.

In addition, the feed difference between the supply systems is preferably in the range of 5 to 30%; if the feed difference exceeds 30%, it may cause a triple winding structure, and conversely, if it is less than 5%, a core-sheath type structure may occur. It becomes difficult to obtain composite yarns.

In addition, using a false twisting device with a yarn feeding function
This is useful in suppressing the generation of neps until they are introduced into the interlacing nozzle. As a false twisting device with yarn feeding function,
A 3-axis circumscribed friction false twister or a belt nip twister can be used.

In addition, using an interlacing nozzle with a yarn feeding function
This is useful in maintaining the yarn length difference as much as possible before interlacing the fibers, and in preventing excessive neps from occurring. The fluid ejection angle θ in the entangling nozzle is preferably in the range of 60° to 85°. If the fluid ejection angle θ is less than 60′, the desired number of nep cannot be obtained and entanglement is difficult to occur.

Conversely, when the fluid ejection angle θ becomes 90°, the number of neps becomes larger than necessary, and the neps also become larger than necessary.

In addition, the yarn length difference in the nep portion is large (also, the entanglement is weak and the structure changes easily due to external force, so it is useful to stabilize the structure by additional twisting. By the way, the interlacing process using an interlacing nozzle This makes it possible to stabilize the core/sheath composite structure.

In addition, a unique color effect can be obtained by combining supply systems with different dyeing characteristics. Furthermore, when polybutyl terephthalate fiber is used in the core, stretchability is added. Furthermore, if a thick single yarn is used as the core yarn and a thin single yarn is used as the sheath yarn, a yarn that is soft to the surface touch and has tension, elasticity, and anti-tapping properties can be obtained.

Furthermore, the number of false twists of the false twisted yarn is 25000/-J"B ~
It is preferably in the range of 3500 o/J stone (T/m). In this way, when the twist density is high, the yarn length difference becomes large, resulting in a warm texture. Moreover, when dyed, a refreshing effect can be obtained. Note that D is the fineness of the false twisted yarn.

Next, the processing method of the present invention will be explained using the drawings.

FIG. 1 shows one embodiment of the present invention, in which the supply system A released from the package 1 includes the lug tail guide 3 and the first
It passes through the supply roller 5 and reaches the focusing guide 7.

On the other hand, after passing through the pigtail guide 4, the supply system B released from the buffing cage 2 is supplied to the supply system A by a separately prepared first supply roller 6 so as to be oversupplied by 5 to 30%. This brings us to Guide 7. In this way, supply systems A and B are supplied separately, but
These supply systems A and B start false twisting in the convergence guide 7 by the winding of the 3-axis circumscribed friction false twisting device 9, and the supply system B is wound around the supply system A to become one thread. . Next, the twisted form in the heating area is heat set by the heater 8, and then untwisted, and further the entangling nozzle 1 installed between the second supply roller 10 and the third supply roller 12
After confounding by 1, the winding pa no cage 13
It is rolled up. As shown in FIG. 2, in the interlacing nozzle 11, the compressed air injection hole 21 is inclined at an angle θ (60° to 85′) with respect to the central axis 23 of the yarn passage 22. Arrow X indicates the direction in which the thread travels.

Once wound into the winding package 13, the yarn was further twisted at 2007/m using a ring twister (not shown) to obtain a nep type composite textured yarn as shown in FIG.

〔Effect of the invention〕

As mentioned above, the nep type composite textured yarn of the present invention has false twist I=! A core-sheath type composite processed yarn consisting of a multi-filament yarn with curl, the yarn length difference between the core yarn and the sheath yarn is 10 to 25%, and the twist density is 100T/m or more, 50 or more intersecting points/m, and 1 to 100 NEP
Since it has 20 pieces/10m, the surface touch of the yarn itself is soft, and it has elasticity, elasticity, and resilience.Furthermore, when it is made into a woven fabric, it has a soft surface touch even though filament yarn is used as the raw yarn. is soft and warm, and
It is not flaky and has a natural appearance with a nappy and heather feel.

Further, the method for producing a nep type composite textured yarn of the present invention includes at least two sets of first supply rollers and a second supply roller disposed on the downstream side thereof.

A heater heated to a temperature between 80°C lower than the melting point of the supply system and a false twisting device having a yarn feeding function is arranged between the False twisting is performed on at least two feeding systems fed by the yarn, and then the resulting false twisted yarn is passed through an entangling nozzle having a fluid jet angle of 60 to 85 degrees in the direction of its movement. Since the interlacing process is carried out and the additional twisting is then carried out, it becomes possible to efficiently produce the above-mentioned nep type composite textured yarn.

In particular, the temperature of the heater for heat fixing must be 8° below the melting point of the supply system.
Since the melting point is between 0° C. lower and not higher than necessary, it is possible to suppress fusion between single fibers, and a nep type composite processed yarn with a soft surface touch can be obtained.

Moreover, the power consumption of the heat fixing heater can be reduced.

〔Example〕

Example 1 Polyester highly oriented undrawn yarn A (273,4 denier/
18 filaments, elongation 166.2%, dyeing properties (normal)) and polyester highly oriented undrawn yarn B (149,6
A filament of denier/36, elongation of 204.1%, and dyeing characteristics (cationic dyeable type) was simultaneously stretched and false-twisted using an apparatus as shown in FIG.

The false twisting conditions at that time are as follows.

(al False twisting processing conditions (1) Feed difference (overfeed ratio of yarn B to yarn A) 215% (2) Processing speed: 400 n/min (3) Stretching ratio = 1.76 (4) Temporary Twisting device: 3-axis external friction false twisting device (5)
False twist number: 1990T/m (6) D/Y ratio (false twisting device surface speed/processing speed):
2.2 (7) Heater temperature: 220°C (8) Fluid injection angle θ of interlacing nozzle: 80° (9)
Pneumatic pressure: 2.5 kg/ad mountain) The characteristics of the composite processed yarn wound into the double-metal plate-type winding package 13 are as follows:
It was as follows.

(11 Fineness: 266.4 denier (2) Number of intertwining points: 138 pieces/m (3) Yarn length difference between yarns constituting the core/sheath portion: 19° 8% (C) 3IJL Next, the yarn is wound into the winding package 13. The obtained composite textured yarn was subjected to additional twisting of 200 T/m using a ring twister.The properties of the obtained nep type composite textured yarn were as follows.

(1) Number of intertwining points: 1138 pieces/m (2) Thread length difference between the threads constituting the core and sheath parts: 19°8% (3) Number of threads (apparent diameter 0.5 to 2.0):
3.5 pieces/10m (d) Reviewer The finally obtained nep type composite processed yarn was made into a plain weave fabric with a warp density of 54 threads/inch and a weft thread density of 54 threads/inch, and then a cationic dye was used. When dyed, even though filament yarn is used as the yarn, the surface touch is soft and warm, and there is no flakiness.
It had a natural appearance with nap and heather texture.

On the other hand, the yarn itself has a soft surface touch, and has a good tension.
It had good elasticity and anti-tB properties, and there were no problems in weavability.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, FIG. 2 is a side view of an interlacing nozzle, and FIG. 3 is an enlarged side view photograph showing the shape of a nep type composite textured yarn according to the present invention. 5.6... First supply roller, 8... Heater, 9
...False twisting device, 10...Second supply roller, 11.
...Entanglement nozzle.

Claims (4)

[Claims] (1) A core-sheath type composite processed yarn consisting of multifilament yarns with false twist crimp, where the difference in yarn length between the core yarn and the sheath yarn is 10 to 25%. , and the twist density is 100T/
Nep type composite processed yarn having 50 or more entangled points/m and 1 to 20 neps/10 m. (2) The nep type composite processed yarn according to claim (1), in which the single fibers of the yarn constituting the sheath are thinner than the single fibers of the yarn constituting the core. (3) A heater heated to a temperature between 80°C lower than the melting point of the supply system and the melting point between the at least two sets of first supply rollers and the second supply roller disposed downstream thereof. and a false twisting device having a yarn feeding function, false twisting is performed on at least two feeding systems that are fed with a feed difference of 5 to 30%, and then the obtained false twisted yarn is Manufacture of a nep-type composite textured yarn, characterized in that the thread is passed through an interlacing nozzle having a fluid jet angle of 60° to 85° in the direction of movement, and then subjected to an additional twisting process. Method. (4) The number of false twists of the false twisted yarn is 25000/√D ~ 350
00/√D(T/m)
3) A method for producing a NEP type composite processed yarn as described in section 3).