JPS60104545A - Bundled spun 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 <Industrial Application> The present invention comprises a fibrous fleece-like ribbon of short fibers heated and joined together by spinning twisting, optionally combined with long fiber bundles. The present invention relates to a bound spun yarn that may be used. The present invention also relates to a method for producing the bound spun yarn.

<Prior Art> A characteristic feature of bound spun yarn is a core with a low twist number tightly bound by a plurality of coated fibers. To produce a bound spun yarn, in the area where the core is strongly twisted by false twisting, the surface of the core is substantially weakly heated or otherwise wound in the opposite direction around the core. It is necessary that a plurality of fibers or portions of the fibers be present. These fibers or a portion of the fibers are commonly referred to as "free ends."

When the false twist in the core imparted by increasing portions of the core is eliminated, the free ends themselves wrap more tightly onto the core, thereby causing the free ends to tighten and strengthen the core. At the same time, core waves also occur.

The production of binding threads requires the following steer ff, which differs from the production method of threads heated in the same direction.

A core of fibrous fleece-like ribbon is false-twisted, the free ends separated, the separated free ends being mechanically attached to the surface of the core being false-twisted, and the free ends having different diameters separated. will be re-wrapped around the core and tightened tightly as a result of the disappearance of the false twist applied to the core.

The released free ends of the plurality of fibers can be created by whole-feeding the plurality of fibers separated from the individual fiber slivers on the surface of the heated core. According to another basic method, the free ends are made from other parts of the plurality of fibers with retaining parts anchored in the heated core. In this case, the method of creating the free ends is to release a portion of the fibers from the surface of the ribbon being heated and to heat the released portion of the fibers into a ribbon. It can be divided into methods that make it completely impossible.

The method of making the released free ends also determines the specific structure of the bound yarn and its positive properties and drawbacks. The manner in which the free end is formed is influenced to a large extent by the machine used and its operating performance.

Coated fibers whose entire portion is on the surface of the heated core, if the free end is constituted by a plurality of complete fibers fed independently to the fiber IJ, p being heated. It is possible to characterize the typical structure of a binding yarn made to have a low twist core that is entangled. This structure is very sensitive to friction, and when the method of manufacturing such yarns is used in practice, the attachment of the coated fibers on one is very irregular, so that the yarn In addition, considerable irregularities will occur.

In other cases where the free end is constituted by several sections of a plurality of fibers, the remaining sections of the several fibers are anchored in the core, such binding threads The structure is characterized in that it has a core of low twist that is entwined with the free ends of all the fibers, and the remaining portions of these fibers constitute a part of the yarn core. It is possible to do so.

Compared to the previous case, the structure of this thread is less sensitive to friction and it is possible to obtain a better uniformity of the produced thread even under conditions of use.

According to one of the known methods, said free ends are obtained by freeing the free ends of a plurality of fibers of the fiber-fleece-like litine which have been heated; Decrease density. The basic feature of this method is that in the area or area between the twist triangle of the false twist and the area of maximum density there is a density that differs by a factor of two in appearance of the false twist. In the vicinity of the twisted triangle, the density of twist in the heated fiber ribbon is apparently low, which allows the free ends of the fibers to be released from the heated ribbon downstream from the twisted triangle. Make it. Reduction of the twist density in the heated ribbon downstream from the twisting triangle can be achieved by using a mechanical twist brake that prevents the twist from moving back toward the twisting triangle, or by adding a second false twist upstream of the twisting element. This can be implemented by arranging imparting elements. The elements acting on the ribbon being heated e.g. heat in a direction opposite to the direction of the first twisting element and act with a weak force.

Under actual working conditions, is the fiber content supplied? On the surface, they have diverse properties. The number of fibers in the cross-sectional area of the unit fraction changes, as well as the arrangement of those fibers and their physico-mechanical properties.

The whole system of imparting and limiting the twist density is achieved by adjusting the twist imparting and twisting by the corresponding adjustment to ensure a constant density within the yarn core for the lengthwise portion of the yarn core and time. should always respond to changes in

When the false twist imparting element and the twist limiting element are arranged in a line as described above, special requirements are made on the adjustment of these elements, making it extremely difficult to maintain operational stability. It is difficult to In fact, in this case only one is suitable for releasing the free ends of the fibers.
An excessive reduction in the number of twists in a region or region with limited twist density leads to a reduction in tenacity within this region and an increase in yarn breakage during operation. On the contrary, an increase in the number of twists within this range leads to a more difficult release of the free ends, resulting in a substantially worse quality of the yarn as a final product.

Problems to be Solved by the Invention and Means for Solving the Problems The disadvantages of the threads produced by the above-mentioned method, in particular the non-uniformity and low strength of the threads, are eliminated by the binding thread according to the invention.

The binding yarn according to the invention is heated by spinning and twisting at least two of the binding yarns which are brought together to form the core of the yarn.
a plurality of fiber ribbons, each of at least two fiber ribbons being nested within said fiber ribbon and deflected from said ribbon; The at least two combined fiber ribbons are entangled together with the remaining portions of the plurality of fibers deflected from the two ribbons.

The yarn according to the invention has good resistance to friction and is uniform in core density and strength in the longitudinal direction.

The stability of the spinning process is a very important condition, and these conditions have not been found reliably in conventional spinning methods. These drawbacks are overcome by the method for producing binding threads according to the invention. The manufacturing method according to the invention is characterized in that the short fibers separated from the flat fiber ribbon in the drafting mechanism are deflected transversely from the longitudinal axis of the fiber ribbon being heated under the effect of an external force; As the operation progresses,
a fiber IJ in which the closest parts of a plurality of deflected staple fibers are heated as a continuous spiral;
j? downstream of the confluence point, the remaining portion of the short fibers deflected from at least one fiber ribbon wraps itself into two fiber structures that are combined and heated. the yarn structure thus created is then passed through a twisting zone where both the spinning and plying twists of the false twist are eliminated; the individual spirals of the deflected short fibers are The method consists in tightening around the fiber ribbon inside the thread structure, on the other hand, all around the entire thread structure at the same time.

In addition to ensuring the stability of the spinning process, the method for producing binding yarns according to the invention also reduces the demands on the equipment used, reducing the consumption of pressurized air for imparting false twist. The adjustment of multiple structural elements is not required because the multiple structural elements do not affect each other.

Embodiments Other advantages and effects of the invention will become apparent from the following description of the structure of a thread and the method for manufacturing a thread according to the invention with reference to the accompanying drawings.

The binding thread 1 according to the invention is made from at least two fiber fleece-like ribbons 2, 2' which are heated and brought together by spinning twisting, and the heated and joined part is part of the core of the binding thread 1. is formed. Each ribbon 2,2 heated by spinning twist
' are separately entangled by a plurality of convolutions of deflected fibers 4, 4'.

The remaining portions of the deflected fibers 4, 4' are arranged in the last spiral 5, around the circumference of the two heated and combined ribbons 2, 2'.
5'.

The binding thread 1 also includes a plurality of individual convolutions 3 consisting of a plurality of fibers 4 with only one ribbon 2 deflected from the binding gun 2, for example.
while the other ribbon 2' is not entangled,
After the two bars 2, 2' are put together, the 2
The combined ribbon 2, 2' of the book can be made to be entangled by the remaining 9 portions of the plurality of fibers 4 deflected from the ribbon 2.

The binding thread 1 according to the invention further comprises a plurality of convolutions 3 of a plurality of fibers 40 portions closest to the ribbon 2 which are deflected from said ribbon 2 and whose ends are anchored in the ribbon 2.
It can be modified to consist only of heated fiber fleece-like ribbons 2 which are entangled with each other. Furthermore, the binding yarn 1 comprises a bundle of long fiber yarns, this bundle of long fiber yarns is combined together with said heated fiber fleece-like ribbon 2, and thereafter:
The two bundled structures may be joined together by the remaining portions of the plurality of fibers 4 deflected from the heated ribbon 2.

A method for manufacturing the binding thread 1 having the structure shown in FIG. 2 will be described below.

The fiber sliver from a sliver receiving container (not shown) is passed into a drafting mechanism in which the sliver is high-drafted. The fiber sliver is made very thin and a flat lithine is formed from it. In the drafting process, the fiber sliver is divided into at least two flat ribbons, 6.
Ripped into 6'.

Construct at least one flat ribbon 6 before reaching the last nip line 7 of the drafting mechanism, for example the nip line 7 of a pair of draft rollers, not shown, arranged in side-by-side relationship. Some of the plurality of fibers detach themselves from the mainstream direction of the flat ribbon 6 and become free.

This phenomenon of separation of multiple fibers can be caused by, for example, the natural ventilation effect of a pair of draft rollers in a draft mechanism, the effect of other external forces such as an electrostatic field, the effect of blowing or mechanically supported negative pressure, etc. Given.

The fibers 4 and/or 4' thus deflected remain potted at their rear ends in the multi-fiber main body of the flat ribbon 6.6'. When the process of manufacturing the binding thread 1 is carried out, the dead weight tips of the plurality of deflected fibers 4, 4' are deflected from the heated ribbons 2, 2' under the action of the external force mentioned above. continue to maintain the condition.

A plurality of polarized fibers 4, 4' are separated from the heated ribbon 2, 2', for example at an acute angle. The angle of separation depends on the stiffness of the stazol fibers in the fiber sliver.

The plurality of deflection fibers 4, 4' then wrap themselves at a selected insertion angle onto the heated ribbon 2, 2', as described below.

Following the deflection of some of the fibers 4.4' from the ribbon 6.6', the process of producing the binding yarn 1 continues by fitting together the two ribbons 6, 6"i. 6.6' is the heated ribbon 2.2', the latter being twisted according to known relationships valid for the twisting triangle.

Is it twisted? The variably progressing cross-sectional portion of the tube 2.2' and the separate fibers held in the ribbon rotate on their longitudinal axes with an angular velocity Φj and are substantially heated by the spinning twist. .

During rotation, the heated ribbon 2, 2' begins to wrap on itself a plurality of deflected fibers 4, 4"e at an acute angle with their closest parts. This indicates that the heated or ? means that the winding of the plurality of fibers into the yarns 2, 2' is started from the point marked.The deflection fibers 4, 4'
It is further added that the deflection fibers 4, 4' continue under the influence of the external forces, whereby the deflection fibers 4, 4' are tensioned and laterally separated. It will be done. The winding of the deflection fibers on the individual heated glue 2, 2' is carried out up to the point where the two heated glue z join. Downstream of the joining point, some last spirals 5, 5' of the remaining free parts of the two ribbons 2, 2'id deflected fibers M4, 4' that are joined together, Book glue? 2, 2'.

The binding yarn 1 thus produced passes through a heating zone 8 in which the yarn 1 is subjected to the action of one of the known pneumatic or mechanical false twisting elements. Downstream of the heating zone 8, both the false twist imparted to the individual fibers IJ yn 2.2' and the combined twist imparted to the two ribbons 2, 2' are eliminated.

However, at the same time the individual spirals 3, 3' begin to tighten around several heated ribbons 2, 2'. Also, two ribbons 2 are combined and heated.
, 2' begin to tighten as the false twists of the ribbons 2, 2'i are eliminated. As a result, the core of binding thread 1 is strengthened,
Tightly tightened.

[Brief explanation of the drawing]

FIG. 1 shows that two fiber ribbons being heated and brought together have an area for freeing the unconstrained ends of a plurality of fibers, in which area the freed fiber ends are heated; FIG. 2 is a front view schematically showing an embodiment of the binding yarn of the present invention, showing a situation in which the fibers are deflected in the lateral direction from the longitudinally progressing portion of the fibers being combined; FIG. FIG. 6 is a front view showing the free ends of the fibers forming a spiral as they are freed and deflected from the ribbon; 1... Binding thread, 2.2'... Fiber fleece-like ribbon, 3.3'... Spiral portion on each ribbon, 4.4'...
... Deflected fiber, 5 ... Combined or spiral part on Z,
6.6'...Flat ribbon, 7...Rib line, 8
Mountain twisting area. Patent Applicants: Erytex, Concern Textilnihos) 0 GILENSTOBI% Patent Attorneys Akira Aoki, Patent Attorney Kazuyuki Nishidate, Patent Attorney Akira Yamaguchi, Patent Attorney + Masaya Yama (19) Continued from page 1 @ Inventor: Ilcie Fandor Che

Claims (1)

[Claims] 1. A bound spun yarn comprising at least two fibrous fleece-like structures, in particular at least two fibrous fleece-like structures, heated and brought together by spinning and twisting. In the bundled spun yarn in which the fiber fleece-like structure constitutes the core of the bundled spun yarn, at least one of the ribbons (2, 2') is anchored in the ribbon and the Convolutions (3, 4') of the closest portions of the fibers (4°4') being deflected from the ribbon
3'), and said at least two combined IJ yns (2,2') are tied together in the last of the remaining portions of said deflected fibers (4,4'). Spiral part (5,
5') - A bound spun yarn characterized by being entwined with a cord. 2. Only one ribbon (2 or 2') is entangled with the inner spiral (3 or 3') of the fibers deflected from the ribbon (2 or 2'), and two ribbon (
The last volute (5 or 5') of the remaining portion of the fibers deflected from said ribbon (2 or 2') has a plurality of fibers (4 or 4') deflected. ) The bound spun yarn according to claim 1, characterized in that the yarn is entangled with . 3. The bound spun yarn according to claim 1, wherein the short fibers inside the combined ribbon (2, '2') have no twist or only residual twist. 4. The binding thread is anchored in and deflected from the ribbon (2 or 2') in the convolution (3 or 3) of the closest part of the plurality of fibers (4 or 4').
’) heated fish entwined with (2 or 2′)
and a bundle of long fibers combined with said ribbon (2 or 2'), two binding structures comprising a plurality of fibers (4 or 4') deflected from said ribbon (2 or 2'). The bound spun yarn according to claim 1 or 2, characterized in that the yarn is entangled together at the last spiral portion (5 or 5') of the remaining portion of the yarn. 5. After drafting the short fiber sliver in a drafting mechanism equipped with a plurality of draft rollers, upstream from the last gill line of the drafting mechanism, how many of the plurality of short fibers in the flat ribbon being drafted are is moved away from the main flow direction of the ribbon, and then the ribbon is heated by spinning twisting using a false twisting element;
A method for producing a bound spun yarn made up of parallel flat ribbons made of short fibers or other fiber structures constituted by long fibers, wherein a plurality of short yarns separated from the flat fiber ribbons in the drafting mechanism are combined. The fibers are deflected under the effect of an external force transversely to the longitudinal axis of travel of the fiber ribbon being heated; as heating progresses, the closest portions of the deflected short fibers deflect themselves. Wound in a continuous spiral onto the heated fiber ribbon up to a point of confluence; downstream of the point of confluence, the remaining portion of the staple fibers deflected from at least one fiber ribbon wraps itself around the fiber ribbon. Wound onto two fiber structures which have been combined and heated; the yarn structure thus created is passed through a twisting zone where both the spinning twist and the pinning twist of the false twist are eliminated; and the yarn structure is deflected. A method for producing a bound spun yarn, characterized in that the individual convolutions of staple fibers are simultaneously tightened on the one hand around the inner fiber ribbon of the yarn structure and on the other hand around the entire yarn structure. 6. In the sliver drafting process, the sliver is separated into at least two ribbons in the drafting mechanism, and the drafting of each of the plurality of ribbons is continued, and the main stream direction of the flow of the plurality of short fibers in the ribbon is continued. 6. The method of claim 5, wherein the entire plurality of ribbons is subjected to the action of an external force which causes some of the plurality of staple fibers to be deflected from the larygon in a transverse direction. 7. While the ribbons are brought together in the area upstream of the confluence, the short fibers deflected from the threads are subjected to a pulling effect provided by using an air stream, an electrostatic field, or a liquid stream. 7. A method according to claim 5 or claim 6, characterized in that the method is received. 8. The method according to claim 5, characterized in that the deflection angle of the plurality of short fibers separated from the ribbon from the longitudinal axis of the ribbon is selected according to the stiffness of the short fibers used. . 9. The winding of the deflected ends of the short fibers onto the heated ribbon is characterized in that the ends themselves wind at an acute angle; or The method described in Section 8. 10. The plurality of deflected staple fibers are wound onto the heated ribbon in a direction opposite to the direction of twist in the plurality of heated ribbons. the method of. 11. The method according to claim 5, characterized in that the number of deflected ends of the plurality of short fibers is selected depending on the desired thickness of the yarn to be spun.