JPH02118125A - Production of bulky spun yarn - Google Patents

Abstract

PURPOSE:To obtain the title spun yarn capable of providing a cloth for apparel, etc., having soft touch by putting a vertically flat and highly shrinkable fiber on horizontally flat and low shrinkable fiber sliver, packaging the latter with the former, drafting and twisting these fibers and subjecting the twisted fiber to heat treatment. CONSTITUTION:Low shrinkable fiber slivers S1 and S3 and highly shrinkable fiber slivers S2 and S4 are each introduced into inlets 11 and 12 of reverse T shaped guide 1 provided with a horizontally flat outlet 9 and vertically flat outlet 10 and in a draft device 7 consisting of a middle roller 5 having back roller 2, sliver guide 3, apron 4 and front roller 6, a sliver arranging vertically flat and highly shrinkable fiber sliver in the upper center of horizontally flat and low shrinkable fiber sliver is formed and then drafted while forming a sliver S encircling the surface of highly flat shrinkable fiber sliver with low shrinkable fiber sliver. The sliver is further introduced into a twisting device 8 by air jet nozzle N1 and N2, where twisting is applied to the sliver to prepare a spun yarn, which is subjected to heat treatment to provide the aimed spun yarn.

Description

[Detailed description of the invention] [Industrial application field l The present invention relates to a method for producing bulky spun yarn. [Conventional technology]

Conventional bulky spinning systems are manufactured by various methods such as spinning fiber bundles using a ring PIh pongee machine while applying tf [ri], but recently fiber bundles such as slivers have been introduced to draft production, and the draft device A spinning device was developed that produces a spun yarn by introducing the drafted fiber bundle into a heated @ position using an air injection nozzle and twisting it. Development is now desired. Even if a fiber bundle with bulkiness is introduced into such a spinning device, only yarn with poor bulkiness can be obtained.
It has been difficult to obtain bulky yarn that is bulky and flexible as a material for apparel, and provides a soft feel even when made into cloth.

[Problem that Komei tries to solve 1 Komei uses spinning Mgc@, which produces a spun yarn by introducing the fiber bundle drafted in 8 draft positions into a heating device using an air injection nozzle and twisting it to produce a spun yarn. The purpose is to obtain a method for manufacturing a spinning system. [Means for solving the problem] A low shrinkage 41 fiber sliver and a high shrinkage II fiber sliver are introduced into an inverted ■-shaped guide having an exit flat in the horizontal direction and an exit flat in the vertical direction, Laterally flat and low shrinkage 4
1i! A sliver is formed in which a flat high-shrinkage fiber sliver is arranged vertically in the upper center of the sliver, and then a sliver is formed in which the surface of the high-shrinkage fiber sliver is surrounded by a low-shrinkage fiber sliver using a sliver guide of draft 8 [1F]. While doing so, a draft is added, and then the yarn is introduced into a heating device using an air jet nozzle and twisted, creating a spun yarn with high shrinkage fibers in the center and low shrinkage fibers on the periphery, which is then heat-treated. Heat shrink the high shrinkage 4I female. K action] The high-shrinkage fibers located at the center of the yarn shrink greatly by heat treatment, and the surrounding low-shrinkage fibers are strongly entangled with the high-shrinkage 11#f, creating an extremely bulky spinning system as a whole. becomes. (Example 1) The present invention will be described in detail below with reference to the drawings. Fig. 1 is a schematic diagram of an apparatus for carrying out the method of the present invention, and shows two types of slivers drawn from a can (not shown). S1.G2 is separately supplied to a guide 1 consisting of upper and lower trumpet guides G1 and G2, and a draft device 7 consisting of a back roller 2, a sliver guide 3, a middle roller 5 on which an apron 4 is mounted, and a front roller 6. The spun yarn Y is sequentially drafted by passing through a heating device 8 equipped with air injection nozzles N and N2 and twisted, and the obtained spun yarn Y is passed through a yarn guide, a delivery roller, a traverse guide, The sliver is wound up into a package through necessary steps such as friction rollers.The guide 1 is as shown in Fig. 2.The sliver S1 is connected to the lower first trumpet guide G1G.
The shape of the outlet 9 is a horizontally long oval or ellipse,
In the upper second trumpet guide G2, the outlet 10 of the sliver S2 has an elongated or oval shape in the vertical direction, and the sliver S of each trumpet guide G, G2
1. The shape of the inlet 11° 12 of G2 is that of the sliver S1. G2
It has an appropriate shape, such as a circle, that allows for easy entry. The outlet 10 of the second trumpet guide G2 is arranged laterally in the center of the outlet 9 of the first trumpet guide G1. Further, as shown in FIGS. 3 to 5, the sliver guide 3 has a sliver passage 13 having a triangular cross-section, and the cross-sectional area of the outlet side 15 of the sliver S1 is smaller than that of the inlet side 14. The sliver S thus introduced passes through the sliver passage 13 while being gradually narrowed. Note that the upper part 16 of the sliver guide 3 shown by two-dot chain lines and diagonal lines may be removed to open the upper part of the sliver passage 13 to facilitate introduction of the sliver end into the sliver passage 13. The heating station 8 is further equipped with air injection nozzles N, N, .
As shown in FIG. 6, a plurality of air jet holes (not shown) are provided for jetting air tangentially into the passage of the sliver S formed through the central axis of the air jet nozzle N1°N2. and the air injection pores lead to arrow A.
, eight directions of air flowing in opposite directions are formed in the passage. The production of spun yarn with the above structure was published in Japanese Patent Application Publication No. 63.
- Disclosed in Publication No. 75124. Next, the present method for producing a bulky spun yarn with excellent bulkiness using the above-described spinning apparatus will be described. In carrying out the present Komei method, firstly, the low shrinkage fiber F
sliver S3 and sliver S of highly contractile LLI fiber F2
Prepare 4. As a type of 4I fiber, 41# has low shrinkage and high shrinkage! Although any fiber can be used, the use of low shrinkage acrylic l&h and high shrinkage acrylic m fibers is most preferred. These slivers S3.84 are the slivers 1 shown in FIG.
The sliver S3 is supplied to the trumpets G1 and G2 of the guide 1 of the 1/j threading device, and as shown in FIG. By doing so, the sliver S4 which has become flat in the vertical direction is arranged,
The sliver S is fed into the back roller 2 to form a flat sliver S with the sliver S4 concentrated in the center, and the sliver guide 3
reach. As shown in FIGS. 8 and 9, the sliver S is
Since the sliver passage 12 of the sliver guide 3 becomes smaller as it reaches its exit, the flat sliver S
is in a state surrounding the sliver S4, and in this state middle roller 5. It is supplied to the front roller 6 and drafted, and then twisted by the air injection nozzles N, N, . That is, the sliver S coming out of the front roller 6 is given a false twist in the direction by the swirling airflow in the direction of the arrow Bh of the air injection nozzle N2, and the false twist propagates to the vicinity of the nip point of the front roller 6. The sliver S coming out of the front roller 6 is focused by false twisting by this air injection nozzle N2, but between the front roller 6 and the air injection nozzle N1, the air injection nozzle N
1, the sliver S is ballooned in the opposite direction, and due to this balloon, the rear end is still nipped by the front roller 6, and fibers that are in the sliver S but whose tips are free are generated. , the front roller 6 and the balloon in the opposite direction to the false twisting by the air injection nozzle N1 and the swirling air flow A of the injection nozzle N1 cause the winding to be performed in the opposite direction to the false twisting by the air injection nozzle N2. Then, in the process of passing through the air injection nozzle N2 and untwisting the false twist, this fiber becomes more and more tightly wound in the direction opposite to the given false twist with a sufficient number of windings, as shown in Fig. 10. Basically, the rear end of the fibers constituting the sliver S facing the running direction of the yarn is in the inner layer of the produced spun yarn Y, and the outer layer of the produced spun yarn Y extends from the front end of the fiber and the front side of the lll1 fiber to the front end. Wrapped with real twist around the part, yet highly shrinkable n, F2
A spun yarn Y is formed in which the low shrinkage a-fibers F1 are located at the center of the spun yarn Y and the low shrinkage a fibers F1 are located on the surface of the spun yarn Y. The spun yarn Y obtained in this way is then transferred to a heat treatment step to be heat-treated, and the high shrinkage IIi fibers F in the spun yarn Y are
2 contracts at a high shrinkage rate, and due to its shrinkage force, the low shrinkage fibers F1 are entangled with the surface, preventing the mutual slipping of the W4 threads, and the center of the yarn Y is the high shrinkage a fiber F2, and the surface is the low shrinkage fiber F2. It was possible to obtain a bulky and flexible bulky system as shown in FIG. 11, which was composed of the elastic fiber F1. Effects of the Invention E As described in detail above, this invention provides an inverted T-shaped guide with a horizontally flat outlet and a vertically flat outlet with low shrinkage. A coarse sliver and a high shrinkage 4I fiber sliver are introduced to form a sliver in which a vertically flat high shrinkage fiber sliver is arranged in the upper center of a horizontally flat low shrinkage fiber sliver. A draft is applied while forming a sliver in which the surface of the high-shrinkage fiber sliver is surrounded by a low-shrinkage 411M sliver using a guide.Furthermore, it is introduced into a heating device using an air injection nozzle and twisted, so that the high-shrinkage fiber is in the center. A spun yarn in which low-shrinkage LJ fibers are located on the peripheral surface is made, and this is heat-treated to cause the high-shrinkage S fibers to shrink. Therefore, the high-shrinkage fibers located at the center of the spinning system are greatly contracted,
The low-shrinkage fibers surrounding the surrounding surface entangle the high-shrinkage fibers even more strongly, forming an extremely bulky spun yarn as a whole. In other words, the fibers drafted by a drafting device are introduced into a heating device using an air jet nozzle and twisted to produce a spun yarn. After the first weaving, the fibers are extremely flexible and can have a soft feel. It became possible to produce bulky spun yarn.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of a spinning device embodying the present invention;
The figure is a perspective view of the trumpet guide, Figure 3 is a front view of the sliver guide, Figure 4 is a right side view of the same as above, Figure 5 is a left side view of the same as above, Figure 6 is a schematic perspective view of the heating device, Figure 7 10 is a sectional view of the sliver showing the state of the sliver just before it is introduced into the drafting device; FIGS. 8 and 9 are sectional views of the sliver showing the deformed state of the sliver while passing through the sliver guide; FIG.
The figure is a front view schematically showing a spun yarn twisted by a heating device, and FIG. 11 is a front view schematically showing a spun yarn of the present invention. sl, s2. s3. s4...Sliver. G1. G2...Trumpet guide. N,, N2...Air injection nozzle. F...Low contractility 41 fibers, F2...High contractility 41
1N. Y...Spun yarn, 3...Sliver guide. 7...Draft device, 8...Heating g-place Patent applicant Murata Machinery Co., Ltd. Agent Patent attorney Katsu Ohno Agent Patent attorney Reiko Ohno

Claims (1)

[Claims] 1. A low-shrinkage fiber sliver and a high-shrinkage fiber sliver are introduced into an inverted T-shaped guide with an exit flat in the horizontal direction and an exit flat in the vertical direction. A sliver is formed in which a flat high-shrinkage fiber sliver is arranged longitudinally in the upper center of the sliver, and then a sliver is formed in which the surface of the high-shrinkage fiber sliver is surrounded by a low-shrinkage fiber sliver using a sliver guide of a drafting device. A draft is added, and the yarn is twisted by introducing it into a heating device using an air injection nozzle to create a spun yarn with high shrinkage fibers in the center and low shrinkage fibers on the periphery. A method for producing bulky spun yarn by heat-shrinking shrinkable fibers.