JP2008056431A - Winding method of sewing raw thread and package obtained by the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding method of a sewing raw thread wherein a tension variation in unreeling is small, an unreeling thread break is reduced, and a collapse caused by an impact in handling such as packing, unpacking, transportation, and spinning preparation can be recovered only by stripping a predetermined amount of yarn, and a product loss can be controlled to the minimum. <P>SOLUTION: When the sewing raw thread is wound to a pirn package having a tapered upper part, a straight part and a tapered lower part, a traverse width is constant from the winding start to the winding end in a traverse width satisfying a following expression (1), and a traverse return part is moved in a constant amount. The expression (1); package maximum winding width/3<traverse width<package maximum winding width. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a winding method for preventing the pirn wound up of sewing thread yarns in the industrial field from being broken by vibration, and minimizing the amount of product peeled off due to the breaking of the pirn, and a package obtained therefrom.

  Conventionally, various methods have been studied as a method of winding a yarn into a bobbin by a ring twist winder, and the most mainstream hitherto is that the traverse width is fixed at the center and gradually increases with time. The parallel wind method (warp wind method) is reduced.

For example, in the parallel winding method, the yarn is usually taken up in the direction in which the yarn package shaft extends toward the upper end of the bobbin during winding. Accordingly, the ballooning of the yarn drawn out at the time of unscrewing may come into contact with the upper side of the taper and cause collapse or burrowing. Furthermore, since the winding width on the inner layer side is wide, the variation in the unjoiling tension is large, and yarn breakage on the inner layer side tends to occur frequently (Patent Document 1). In Patent Document 1, as shown in FIG. 1, a winding method is proposed in which variation B is formed in the traverse folded portion to suppress the standing of the both end faces of the package and to reduce breakage of the unraveling yarn. Breakage occurs due to impact during handling such as transportation and preparation of thread stand. It is difficult to remove the collapse, and all products become waste.
Japanese Patent Laid-Open No. 03-192072 (FIG. 1)

  The invention of the present application suppresses the collapse due to the collapse of the yarn ballooning that is pulled out at the time of paring of the pan, and the impact during handling such as packing, unpacking, transportation, preparation of the thread stand, etc. Even if it occurs, the amount of stripping is minimized.

An object of the present invention is to traverse a traverse width from the beginning of winding to the end of winding with a traverse width satisfying the following formula (1) when winding a sewing thread yarn onto a pirn package having a taper upper portion, a straight portion, and a taper lower portion. The problem is solved by a method for winding the sewing thread yarn, which is characterized in that the folded portion is transferred by a constant amount.
(1) Maximum winding width of the package / 3 <Traverse width <Maximum winding width of the package Further, the winding method of the present invention reduces tension fluctuation during unwinding and reduces unthreaded yarn breakage. Also, packing, unpacking and transportation Provided is a package that can be recovered by simply stripping a certain amount of yarn even if collapse occurs due to an impact during handling such as preparation of a thread stand, and the product loss can be minimized.

  The pirn wound in the present invention can reduce the amount of product peeled off when collapse occurs compared to the pirn wound by the parallel wind method, which is a conventional winding method. In contrast to the conventional parallel wind method, all of the product for one PAN is scrapped, while the winding method of the present invention is constant (the yarn length for one cycle with the folded part of the traverse at the upper or lower end). Just strip off. Moreover, collapse by vibration can be reduced by increasing the winding hardness. In the prior art, when the winding hardness is increased, the winding tightening stress is applied to the tapered portion, whereby the yarn quality on both end faces of the package is easily changed, and the winding is easily broken during winding. On the other hand, the present invention can increase the winding hardness compared to the prior art, and the winding tightening stress is dispersed, so that the yarn quality at both ends of the folded portion does not change.

  The sewing thread yarn of the present invention is a polyester from the viewpoint of versatility, and the polyester is terephthalic acid as a main acid component, and at least one glycol, preferably an alkylene selected from ethylene glycol, triethylene glycol, and tetramethylene glycol. The thing which uses glycol as the main glycol component is said, and a polyethylene terephthalate type polyester is especially preferable.

The traverse width in the present invention satisfies the following equation (1).
(1) Maximum package winding width / 3 <Traverse width <Maximum package winding width Preferably, in order to minimize the amount of stripping when collapse occurs, the maximum package winding width is less than 0.9.

  Further, the traverse width is constant and the traverse folded portion is moved (shifted up and down) by a constant amount from the start of winding to the end of winding to form a pan shape. For example, when the traverse fold is first shifted downward by a certain amount and the traverse fold reaches the lowest end of the winding position, the traverse fold is then shifted upward by a certain amount and the traverse fold is moved to the winding position. To the top of the. In this case, a certain amount of transfer (amount of displacement) is preferably less than 5 mm for stabilizing the winding tension near the full package and preventing yarn breakage.

  As for the winding hardness of the package obtained in the present invention, the average winding hardness of the taper upper part, the straight part and the taper lower part is 87.0-100. Further, the sewing thread yarn package satisfies (2) straight portion hardness × 0.97 ≦ taper portion hardness ≦ straight portion hardness × 1.03. The average winding hardness and each hardness absolute value are for preventing the package from collapsing due to vibration such as dropping.

  The dry yield of the sewing thread yarn of the package obtained in the present invention is preferably 3.0% or less. The shrinkage characteristic difference between the inner layer and the surface layer of the package can be suppressed.

  The total fineness of the sewing thread yarn in the present invention is preferably 40 to 300 dtex. This is preferable because it stabilizes the winding tension in the vicinity of the full package and prevents the yarn layer from shifting at the tapered portion.

  The taper portion angle of the package of the present invention is preferably 15 to 25 °. It can stabilize the shape of the package and prevent it from collapsing.

Examples will be described in detail below. The measured values in the examples and comparative examples are as follows.
(1) Amount of product peeled off when a collapse occurred. When the stripping amount was 1/9 or less of the product volume, it was marked as ◯, when it was 1/5 or less, Δ, and when it was over 1/5, it was marked as x.
(2) Pane winding amount: ◯ when the pan winding amount is 3.0 kg or more, Δ when it is 2.8 kg or more, and x when it is less than 2.8 kg.
(3) Pann drop test The pann was packed in a carton case and dropped horizontally with the distance from the bottom of the carton case to the floor being 50 cm. The case where the collapse of the panning occurred 20 times or more was evaluated as “◯”, the case where it occurred 10 times or more, and the case where it occurred less than 10 times as “X”.
(4) Dry aberration (rate of change in dry yield) by Pahn layer
The dry yield value was measured at the surface layer portion and the inner layer portion (50 g) of the pan, and the fluctuation rate was confirmed. When the rate of change was 25% or less, it was marked as ◯, when it was 50% or less, Δ, and when it was over 50%, it was marked as x. The dry yield fluctuation rate was calculated by the following formula.
Dry yield fluctuation rate (%) =
{| Dry yield value of the surface layer portion−Dry yield value of the inner layer portion (50 g) | / Average value of the surface layer portion and the inner layer portion} × 100
The dry yield measurement was calculated from the sample length before and after heat treatment (160 ° × 30 minutes) under a constant load. The dry yield value was calculated by the following formula.
Dry yield value (%) = {(original length−post-treatment length) / original length} × 100
Example 1
The traverse width when winding the raw silk yarn made of polyester into a pirn shape is the maximum winding width x (2/3), and the traverse folding part is transferred from the start of winding to the end of winding with a constant traverse width and a constant displacement of 3 mm. It was.

  The average winding hardness of the package is 90, and each hardness satisfies straight portion hardness × 0.97 ≦ taper portion hardness ≦ straight portion hardness × 1.03. The total fineness of the sewing thread yarn is 200 dtex, and the dry yield value of the inner layer portion (50 g) is 2.0%.

  The obtained package was capable of winding 3.0 kg, and there was no panning that collapsed after 20 times in the panic drop test. In addition, when the pirn with a slight collapse of the tapered portion was peeled off, the peeled amount was as good as 1/9 of the product winding amount. The dry yield fluctuation rate was as good as 10%.

Comparative Example 1
The traverse width when winding the raw silk thread made of polyester into a pirn shape is the maximum winding width x (1/5), and the traverse folding part is transferred from the start to the end of winding with a constant traverse width and a constant displacement of 3 mm. It was.

  The average winding hardness of the package is 75, and each hardness satisfies straight portion hardness × 0.97 ≦ taper portion hardness ≦ straight portion hardness × 1.03. The total fineness of the sewing thread yarn is 200 dtex, and the dry yield value of the inner layer portion (50 g) is 2.0%.

  The obtained package was wound with 2.8 kg, and the collapsed pann occurred in 5 times in the pan drop test. Further, when the pirn with the tapered portion collapsed was peeled off, the amount of peeling was 1/9 of the product volume. The dry yield fluctuation rate was 10%.

Example 2
The traverse width when winding the raw silk yarn made of polyester into a pirn shape is the maximum winding width x (9/10), and the traverse folding part is transferred from the winding start to the winding end with a constant traverse width and a constant displacement of 3 mm. It was.

  The average winding hardness of the package is 95, and each hardness satisfies straight portion hardness × 0.97 ≦ taper portion hardness ≦ straight portion hardness × 1.03. The total fineness of the sewing thread yarn is 200 dtex, and the dry yield value of the inner layer portion (50 g) is 2.0%.

  The obtained package was capable of winding 3.0 kg, and there was no panning that collapsed after 20 times in the panic drop test. Further, when the pirn with the minute collapse of the taper portion was peeled off, the peeled amount was 1/8 of the product winding amount. The dry yield fluctuation rate was as good as 20%.

Example 3
The traverse width when winding the raw silk thread made of polyester into a pirn shape is the maximum winding width x (1/3), and the traverse folding part is transferred from the beginning to the end of winding with a constant traverse width and a constant displacement of 3 mm. It was.

  The average winding hardness of the package is 87, and each hardness satisfies straight portion hardness × 0.97 ≦ taper portion hardness ≦ straight portion hardness × 1.03. The total fineness of the sewing thread yarn is 200 dtex, and the dry yield value of the inner layer portion (50 g) is 2.0%.

  The obtained package had a weight of 3.0 kg, and a panning that collapsed occurred 12 times in the panning drop test. Further, when the pirn with the minute collapse of the taper portion was peeled off, the peeled amount was 1/9 of the product winding amount. The dry yield fluctuation rate was as good as 10%.

Example 4
The traverse width when winding the raw silk yarn made of polyester into a pirn shape is the maximum winding width x (2/3), and the traverse folding part is transferred from the start of winding to the end of winding with a constant traverse width and a constant displacement of 3 mm. It was.

  The average winding hardness of the package is 93, and each hardness satisfies straight portion hardness × 0.97 ≦ taper portion hardness ≦ straight portion hardness × 1.03. The total fineness of the sewing thread yarn is 200 dtex, and the dry yield value of the inner layer portion (50 g) is 6.0%.

  The obtained package was capable of winding 3.0 kg, and there was no panning that collapsed after 20 times in the panic drop test. In addition, when the pirn with a slight collapse of the tapered portion was peeled off, the peeled amount was as good as 1/9 of the product winding amount. The dry yield fluctuation rate was 50%.

Example 5
The traverse width when winding the raw silk yarn made of polyester into a pirn shape is the maximum winding width x (2/3), and the traverse folding part is transferred from the start of winding to the end of winding with a constant traverse width and a constant displacement of 3 mm. It was.

  The average winding hardness of the package is 90, and each hardness satisfies straight portion hardness × 0.97 ≦ taper portion hardness ≦ straight portion hardness × 1.03. The total fineness of the sewing thread yarn is 40 dtex, and the dry yield value of the inner layer portion (50 g) is 2.0%.

  The obtained package was capable of winding 2.8 kg, and there was no panning that collapsed after 20 times in the panic drop test. In addition, when the pirn with a slight collapse of the tapered portion was peeled off, the peeled amount was as good as 1/9 of the product winding amount. The dry yield fluctuation rate was as good as 10%.

Example 6
The traverse width when winding the raw silk yarn made of polyester into a pirn shape is the maximum winding width x (2/3), and the traverse folding part is transferred from the start of winding to the end of winding with a constant traverse width and a constant displacement of 3 mm. It was.

  The average winding hardness of the package is 90, and each hardness satisfies straight portion hardness × 0.97 ≦ taper portion hardness ≦ straight portion hardness × 1.03. The total fineness of the sewing thread yarn is 300 dtex, and the dry yield value of the inner layer portion (50 g) is 2.0%.

  The obtained package was capable of winding 2.8 kg, and there was no panning that collapsed after 20 times in the panic drop test. In addition, when the pirn with a slight collapse of the tapered portion was peeled off, the peeled amount was as good as 1/9 of the product winding amount. The dry yield fluctuation rate was as good as 10%.

Traverse trajectory described in Japanese Patent Laid-Open No. 03-192072 of Cited Document 1 Schematic diagram explaining the traverse trajectory of the present invention Schematic diagram illustrating the package of the present invention

Explanation of symbols

A: Traverse trajectory B; Traverse variation C; Displacement amount D; Traverse folding part E; Traverse width F; Taper upper part G; Straight part H; Taper lower part I;

Claims (4)

When winding the sewing thread yarn on a pirn package with a taper upper part, straight part, and taper lower part, the traverse width satisfying the following formula (1) is maintained, the traverse width is constant from the beginning of winding to the end of winding, and the traverse folding part is constant. A method of winding a sewing thread yarn, characterized by transporting the sewing thread.
(1) Maximum package winding width / 3 <Traverse width <Maximum package width A sewing thread yarn package obtained by the winding method according to claim 1, wherein the winding hardness satisfying the following formula (2) and the average winding hardness of the taper upper part, the straight part, and the taper lower part are 87.0-100. A package in which the dry yield of the sewing thread yarn is 3.0% or less.
(2) Straight part hardness × 0.97 ≦ Taper part hardness ≦ Straight part hardness × 1.03   The package according to claim 2, wherein the total fineness of the sewing thread yarn is 40 to 300 dtex.   The package according to claim 2 or 3, wherein the package weight is 3.0 kg or less.

Images