JPS61194235A - Production of metal wire composite elastic 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] (Industrial application field) The present invention relates to a method for manufacturing a metal wire composite elastic thread.

More specifically, the present invention relates to a method for producing a metal wire composite elastic yarn that can be preferably used for electric wires with stretchability and stretchability, or for electrolytic shielding, X-ray shielding, etc. when made into a fabric.

The metal wire composite elastic yarn produced by the method of the present invention has a core composed of an elastic filament yarn and a fiber bundle aligned or spirally wound around the elastic filament yarn.
It is made by winding a metal wire in a spiral shape, and is of high practical value because of its excellent stretchability and recovery, as well as the various properties provided by the metal wire.

(Prior art) Conventionally, for example, in order to impart elasticity to electric wires, metal wires have been spirally wound and heat-treated, but although this material has elasticity, it has little recovery properties. Moreover, the metal wire itself is thick and heavy, and has the disadvantage of causing sag. Furthermore, since the metal is processed into a spiral shape, manufacturing costs are also high.

On the other hand, there are curl cords used in telephones, etc., which are made of a straight electric wire as a core and a thermoplastic elastomer as a sheath layer, but these cords are also more or less thick and heavy, and are elastic and recoverable when curled. This has the essential drawback of causing sag as a result, and the field of application is narrow.

(Problems to be Solved by the Invention) In view of the above-mentioned points, the present inventors have conducted extensive studies to obtain a light and thin stretchable conductive wire that has excellent stretchability and stretchability. As a result, we have arrived at the present invention.

In order to obtain thread-like or linear products with excellent stretchability and stretch recovery, elastic fiber filament yarns that generally exhibit a stretchability of 100% or more, particularly those with a stretchability of 400% or more, are required. It is effective to use an elastic fiber filament yarn that exhibits a high elastic fiber filament yarn, and if such an elastic fiber filament yarn and a metal wire can be successfully constructed into a composite state, the elastic fiber filament yarn has excellent stretchability and elasticity. A filamentous or linear material having both recovery properties and the inherent properties of metals such as conductivity, electric field shielding properties, X-ray shielding properties, and heat retention properties can be obtained.

Considering these points, a composite yarn consisting of an elastic fiber filament yarn as a core and a metal wire wound spirally around at least the core is effective.

However, there are various problems in simply combining elastic fiber filament yarn, which can be said to be extremely flexible, with metal wire, which is inherently less extensible and generally has higher rigidity. In order to make full use of this and obtain the desired effect, careful attention is required.

In other words, the properties of the composite yarn, especially the properties such as the conductivity brought about by the metal wire, may be substantially different between stretching and recovery from stretching, or the composite yarn may have a zigzag shape, or when stretched and recovered. If the yarn ends up having a zigzag shape after repeated stretching and recovery, it is no longer possible to effectively exhibit the elastic properties of the elastic fiber filament yarn. Furthermore, even in cases where the composite yarn cannot maintain a straight shape, it is impossible to fully exhibit the elastic extensibility and elastic recovery properties of the elastic fiber filament yarn. If a conductive wire with a shape is used, it may become a cause of erroneous operation.

In view of the above-mentioned points, an object of the present invention is to provide a yarn that has excellent stretchability and recovery properties, and has good yarn surface quality, even though metal wire is used as a component. The present invention also aims to provide a method for manufacturing a metal wire composite elastic yarn that can maintain good straightness of the yarn.

(Means for Solving the Problems) The method for manufacturing an elastic metal wire yarn of the present invention that achieves the above object has the following configuration.

That is, the elastic fiber filament yarn is aligned or wound in advance or within the draft area in the area where the elastic fiber filament yarn is drafted at a draft magnification of 1.5 to 4.5 times. A metal wire having a diameter that satisfies the relationship between the diameter of the elastic fiber filament yarn and the following formulas (a) and (b) is spirally wound around the fiber bundle and the elastic filament yarn. This is a method of manufacturing a metal wire composite elastic thread.

D/d≧3.5 ・・・・・・(a) d≦1.0
・・・・・・(b) However, D=converted diameter of elastic fiber filament yarn of Nidraft (
mm) d: Converted diameter of metal wire (mm).

(effect) Hereinafter, the present invention will be roughly explained in detail.

FIG. 1 and FIG. 2 are process schematic diagrams each showing an example of the method for manufacturing the metal wire elastic thread of the present invention.

The method of the present invention utilizes a known covering yarn manufacturing mechanism using a hollow spindle, but there are two types of yarn used for the covering yarn: a fiber bundle 16 and a metal wire 21. In particular, the hollow spindle is provided in two stages of 14.19.

In these figures, the elastic fiber filament yarn 10 is guided from the package 11 via the carrier roller 12 to the top roller 23. The elastic fiber filament yarn is sufficiently drafted (stretched) between the carrier roller 12 and the top roller 23.

In the method of the present invention, the 5ast which has been drawn or wound around the elastic filament yarn in advance or within the region where the draft is carried out is used.
A metal wire is spirally wound around both the T-bundle and the elastic filament yarn as a core. 1 and 2 both show the case where the fiber bundle 16 is spirally wound around the elastic fiber filament yarn 10 in the draft area to constitute a core before the metal wire 21 is wound.

When winding such a metal wire, a highly rigid and relatively thin metal wire is generally wound around a stretchable and flexible elastic fiber filament yarn, and when setting the winding conditions, According to the findings of the present inventors, in order to obtain a metal wire composite elastic yarn with good surface quality and excellent straightness and stretchability, it is necessary to pay sufficient attention to It is necessary to perform the winding process while drafting the elastic fiber filament yarn at a draft ratio of 1.5 to 4.5 times.

The draft ratio range is preferably 1.5 to 3.5.
This is twice the range. By doing this, the elastic fiber filament yarn is processed and operated in the elongation range where the recovery rate is generally excellent, and a composite yarn with excellent stretch recovery and good surface quality can be obtained. It will be done.

Further, it is necessary that the diameter of the elastic fiber filament yarn and the diameter of the metal wire satisfy the relationships expressed by equations (a) and (b). That is, when D/d is less than 3.5 times, the elasticity of the composite system produced is poor (it is difficult to obtain the desired effect of the invention, and when the metal wire is covered with The ballooning tension of the wire becomes extremely unstable, and the metal wire composite yarn produced in this case generally has a curved shape in the form of a broken line, which is completely undesirable.

Further, when winding the metal wire in carrying out the method of the present invention, it is preferable that the helical angle θ shown in FIG. 3 is 20 degrees or more immediately after the winding. According to the findings of the present inventors, the product composite yarn obtained by the method of the present invention has a metal wire winding helical angle (in $! quality yarn) of 30 degrees or more, which improves elasticity and surface quality. It is preferable to make the helix angle 20 degrees or more immediately after winding to prevent the composite yarn from loosening and winding.
The elastic fiber filament yarn is shrunk by winding, and the product yarn has a winding helical angle of 30 degrees or more.

Also, as shown in equation (b) above, the converted diameter of the metal wire is 1
mm or less, and if the value exceeds 1 mm, it is generally difficult to obtain a desirable composite state.

The metal wire composite elastic yarn obtained by the present invention has a basic structure in which the metal wire obtained in the above process is wound in a single layer, but the metal wire is roughly wound in multiple layers. Even in the case of such multiple windings, it is important that each wound metal wire satisfies the above formula (a) and that the draft ratio for the elastic fiber filament yarn satisfies the above-mentioned range.

In addition, in the method of the present invention, at the stage where the fiber bundle is wound around the elastic fiber filament yarn, the fiber bundle is once wound, and the fiber bundle previously wound around the elastic fiber filament yarn and the core of the fiber filament yarn thus obtained are separated. On the other hand, the metal wire may be wound within the drafting area defined by the above-mentioned draft ratio of the present invention.

Further, when manufacturing a multi-wound metal wire, in the process mode shown in FIGS. 1 and 2, downstream of the hollow spindle 19,
Furthermore, a process may be adopted in which one or more hollow spindles for winding the metal wire are provided in multiple stages to wind the metal wire multiple times.

Here, the draft ratio is a value expressed by the surface speed ratio of the carrier roller 12 and the top roller 23. In addition,
As shown in FIG. 2, after passing the carrier roller 12, a feed roller 13 is especially provided so that the carrier roller 12
Even when preliminary drafting is performed between the carrier roller 12 and the feed roller 13, the draft ratio is a value expressed by the surface speed ratio of the carrier roller 12 and the roller rollers 1 to 23. Such a preliminary draft may be a very weak draft of about 1.3 to 1.6 times, but by performing such a preliminary draft, more stable composite yarn production becomes possible. .

To roughly explain the steps shown in Figures 1 and 2, 14
and 19 are hollow spindles on which the threads to be covered are respectively wound around bobbins 15 and 20. That is, the lower hollow spindle 14 and the upper first hollow spindle 19 are each provided with bobbins 15 and 20, forming a double covering arrangement. Bobbin 1
The fiber bundle 16 wound around the fiber bundle 16 is rotated by the lower hollow spindle, and the core of the elastic fiber filament yarn is horizontally wound at the ballooning point 17. The metal wire wound around the bobbin 20 is rotated by the upper hollow spindle in the opposite direction to the lower spindle, becomes a composite yarn 22 at the ballooning point 17, and is sufficiently relaxed between the top roller 23 and the take-up roller 25. composite yarn 2
4 is wound up into a package 26. Further, a multi-wound composite yarn of metal wire can be produced by repeatedly winding the metal wire horizontally around the composite yarn thus obtained, or by providing hollow spindles in multiple stages. In the case of multiple winding, the method of horizontally winding the metal wires is not particularly limited, but it is preferable to wind the metal wires in the same helical direction because the resulting composite yarn has a smoother appearance.

The covering operation is basically the same as the normal covering thread production except that the ballooning tension must be constant in order to keep the helical pitch of the metal wire 21 constant. This is achieved by adjusting the fryer 27 according to the thickness of the metal wire and the spindle rotation speed.

When using a fryer, it is best to lower the spindle speed. Also, if you don't use a fryer,
It is necessary to adjust the ballooning tension by centrifugal force at a spindle rotation speed of at least 3000 RPM or more. Otherwise, when the metal wire is unwound from the bobbin 20, it will "sag", resulting in a poor quality, non-uniform product.

The metal wire composite elastic yarn of the present invention thus obtained may be slightly untwisted, if necessary, for the purpose of eliminating residual torque, or may be subjected to dry heat treatment at approximately 80 to 100°C as appropriate. It is.

The fiber bundle used in the core of the composite yarn together with the elastic fiber filament yarn is used primarily to prevent the metal wire from breaking when the fabric is stretched. Threads or spun yarns can be used, and in particular, high-strength polyester filament yarns, which have been curled by temporary twisting or the like, or polyaramid filament yarns, which are also high-strength yarns, can be used. It can be preferably used. In addition, the fiber bundle may be composed of carbon fiber or carbon fiber yarn depending on the case, and in this case, the fiber bundle has the characteristic of having high strength and electrical conductivity. It is.

Furthermore, the fiber bundle can also bring about effects such as controlling the stretching/elongation characteristics of the yarn of the present invention to a certain level during stretching.

The fiber bundle is preferably wound around an elastic filament yarn to form a core, and in this case, it is desirable that the metal wire and the fiber bundle are spirally wound in opposite directions.

By doing so, it is possible to exhibit preferable stretchability and to keep the stretch/elongation rate of the composite yarn almost constant, thereby effectively preventing the metal wire from being cut in the stretched state. In the above description, a method using a covering machine was mainly explained when winding the fiber bundle into an elastic filament yarn, but a wrapping method may also be used. On the other hand, the fiber bundle may not be spirally wound around an elastic filament yarn, but may simply be aligned. However, in that case, it is important to use a curled yarn such as a temporarily twisted yarn that has some degree of elasticity.

In addition, the elastic fiber filament yarn has an elongation rate of at least 100%, preferably 400%.
There are no particular limitations on polymers, etc., but for example, various fiber filament yarns having elastic properties such as polyurethane elastomer, polyester elastomer, polyurethane elastomer, natural rubber, synthetic rubber, etc. Can be used, durable,
Considering embrittlement, polyurethane-based, polyester-based, or polyamide-based elastomers are preferred.

The elastic filament yarn may be either a monofilament yarn or a multifilament yarn, but from the point of view of recovery power after elongation, multifilament yarn is preferable because it can be said that the recovery power is generally stronger than that of monofilament yarn. be.

The form of the metal wire is not particularly limited, such as a linear metal foil or a circular cross-section perpendicular to the longitudinal direction, and may be determined as appropriate depending on the purpose of use. In particular, when using a foil-like linear material, it is possible to obtain a composite yarn with an extremely smooth surface and good coverage with the metal, resulting in a composite yarn with a smooth surface. . Also, when the metal wire is wound multiple times, the metal coverage is further improved. When winding the metal wire multiple times, it is preferable that the helical direction of each metal wire be the same so as not to impair the stretchability.

Schematic model diagrams of the metal wire composite elastic yarn obtained by the method of the present invention are shown in FIGS. 3, 4, and 5.

In these figures, 1 is an elastic fiber filament yarn, 2 is a fiber bundle, and 3 is a metal wire. Each figure shows an example in which the fiber bundle 2 is wound spirally around the elastic fiber filament yarn 1, and also in a direction opposite to the winding direction of the metal wire 3. There is. Also, the third
Fig. 4 shows an example of a composite thread made using a metal wire with a circular cross section, Fig. 4 shows an example of a composite thread made using a foil-shaped metal wire, and Fig. 5 shows an example of a composite thread made of a metal wire wound twice. ing.

In addition, here, the sieve diameter D (
mm> is determined by the following equation (C).

D=10xF "τ7Tπ0 (mm) -" (C)
Here, W: Denier (weight) of elastic fiber filament yarn (g/
9x105cm> L: Length of elastic fiber filament yarn Here, L=9
xlO5cm) ρ: Specific gravity (Q/cm3) of the elastic fiber filament yarn, which is the value in the supply system before being drafted.The denier value is the value at a yarn length of 9000 m (pull weight unit q). It represents.

In addition, the converted diameter d (mm”) of the metal wire is determined by the diameter d (mm) as it is when the metal wire has a round cross section, and when it is a non-circular item such as a foil shape, the converted diameter d (mm”) is determined by the diameter d (mm) of the metal wire, etc. Area S
Based on this, the diameter d (mm) is calculated by converting it into a round cross-section thread with the same cross-sectional area.In other words, in this case, d=ff7F (mm). When determining the cross-sectional area of a foil-like object, the thickness is determined down to the micron level.

The metal wire composite elastic thread obtained by the present invention can be used in various fields by taking advantage of the characteristics and stretchability of the metal wire, and has high practical value.

(Example) Hereinafter, the configuration and effects of the present invention will be specifically explained using examples.

Example 1 A polyurethane filament yarn (560 denier, 42 filaments) was stretched at a draft ratio of 3.5 times using a covering machine as shown in Fig. 2, and a polyester pre-twisted yarn (50 denier) was wound around it. Then, a copper wire having a diameter of 0.03 mm was further wound to produce a metal wire composite elastic thread having a three-layer concentric structure. The metal wire composite elastic yarn thus obtained had good stretch characteristics and surface quality.

Example 2 Polyurethane filament yarn (1680 denier, 11
2 filament) was stretched at a draft ratio of 3.2 times using a covering machine as shown in Figure 2, and a polyester pre-twisted yarn (50 denier) was wound around it to a rough thickness of 0.035 mm. A metal wire composite elastic yarn with a three-layer concentric structure was manufactured by winding the copper foil. This thread was stretched again using a covering machine at a draft ratio of 1.5 times, and then wrapped with copper foil 00035 mm thick to create a metal wire composite elastic structure with a 4-layer concentric structure (metal wire double helix). produced yarn. The thus obtained double-wound composite elastic thread of copper foil had excellent copper coverage and stretchability, and had a smooth thread surface.

Example 3 A polyurethane filament yarn (210 denier, 20 filaments) was stretched at a draft ratio of 3.0 times using a covering machine as shown in Fig. 2, and a polyester pre-twisted yarn (30 denier) was wound around it. Turn it around, roughly wrap the aluminum foil with a thickness of 0.015 mm, and
Metal wire composite elastic yarn with layer concentric structure was manufactured. The yarn thus obtained had good elastic properties and a smooth yarn surface.

(Effect of the invention) The effects of the present invention will be described below.

According to the present invention, although it contains a metal wire, it has good surface quality and excellent flexibility and stretchability, which could not be obtained with conventional similar products. Although the fabric to be processed contains metal,
This yarn has the characteristics of being resistant to bending, stretching well, and shrinking well when released even after being stretched, and this yarn is the first to be obtained by the manufacturing method of the present invention.

Since the method of the present invention is not particularly limited in practice with respect to the material of the metal wire, it is possible to select the material of the metal wire according to the application, and the field of application thereof is wide.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are process schematic diagrams each showing an example of the method for manufacturing the metal wire elastic thread of the present invention. FIG. 3, FIG. 4, and FIG. 5 are schematic model diagrams each showing an example of a metal wire composite elastic yarn obtained by the method of the present invention. Brief description of the drawings 1.10: Elastic fiber multifilament yarn 2.16: Fiber bundle 3.21: Metal wire 12: Carrier roller 14.19: Hollow spindle 23: Top roller

Claims (5)

[Claims] (1) The elastic fiber filament yarn is drawn or wound in advance or within the draft area within the area where the elastic fiber filament yarn is drafted at a draft magnification of 1.5 to 4.5 times. A metal wire having a diameter that satisfies the relationship between the diameter of the elastic fiber filament thread and the following formulas (a) and (b) is spirally wound around the fiber bundle and the elastic filament thread. A method for manufacturing a metal wire composite elastic thread. D/d≧3.5・・・・・・(a) d≦1.0・・・・・・(b) However, D: Converted diameter of elastic fiber filament yarn before drafting (
mm) d: Converted diameter of metal wire (mm) (2) The method for manufacturing a metal wire composite elastic yarn according to claim (1), wherein the metal wire is a linear object of metal foil. (3) Manufacturing a metal wire composite elastic yarn according to claim (1), wherein the metal wire has a substantially circular cross-sectional shape perpendicular to the longitudinal direction of the metal wire. Method. (4) When the fiber bundle is wound around the elastic fiber filament yarn, the metal wire is wound in the direction opposite to the direction in which the fiber bundle is wound. The method for producing a metal wire composite elastic yarn according to item (2) or item (3). (5) Claims (1), (2), and (3) characterized in that when winding the metal wire, the winding helical angle immediately after winding is set to 20 degrees or more. Or the method for producing a metal wire composite elastic thread according to item (4).