JP7104958B2 - tie - Google Patents

Description

The present invention relates to a tie for binding objects.

When bundling two or more rod-shaped or linear objects, there are methods of tying them with a string, fixing them with a rubber band, or fixing them with a binding band. However, this is suitable for a method of fastening in one place, and is not suitable for the role of covering or protecting an object to be bound.

Protective members for linear bodies such as electric wires and cables generally include protective members for plastic molded articles. However, although a plastic molded product that has been molded from the beginning does not lose its shape, it is difficult to attach it to an object and to bend it.
Further, the method of winding soft fibers described in Patent Document 1, for example, is easy to wind and easy to bend after molding, but has a problem that the shape tends to collapse.

Furthermore, when the binder fiber is wound, if the binder fiber is exposed, there is a problem that the binder fiber sticks to guides, rolls, etc. in the setting process, or sticks to the object after binding. If it sticks to the object, it is difficult to follow the bending deformation, and even if it tries to cancel the convergence, the object cannot be separated.

JP-A-2002-069775

The present invention has been made in view of such problems. To provide a binder excellent in easiness of bending and easiness of detachment from an object.

In order to achieve this object, the closure of the present invention
Consists of a fiber structure having an inner peripheral portion and an outer peripheral portion,
The inner peripheral portion is composed of an assembly in which a plurality of first fibers having at least a portion of the fiber surface formed of a low-melting polymer are aligned and arranged in the length direction of the fibers ,
The outer peripheral portion is an assembly in which a plurality of second fibers are aligned in the longitudinal direction of the fibers , the entire surface of which is formed of a high-melting polymer having a higher melting point than the low-melting polymer. and does not contain the first fiber,
The outer peripheral portion covers the inner peripheral portion so that the inner peripheral portion is not exposed to the outer surface of the fiber structure, and the low melting point polymer is not exposed to the outer surface of the fiber structure. characterized by

The tie of the present invention is preferably in the form of a thread, cord, braid or rope from one or more fibrous structures. Alternatively, it is preferable that a plurality of fiber structures are formed into a tape-like, band-like, sheet-like, cylindrical, or bag-like form. It is preferred that

The binder of the present invention preferably retains its binding form by softening or re-solidifying the low melting point polymer in the first fibers.

In the binding method of the present invention, an object to be bound is bound using the binding tool, and then the binding tool is heat-treated at a temperature lower than the temperature at which the high melting point polymer in the second fiber maintains the fiber form. Thus, the low-melting-point polymer in the first fibers is softened or melted and then solidified again, thereby retaining the binding form of the binding tool.

In the binding structure of the present invention, an object to be bound is bound using the above-described binding tool, and the low-melting point polymer in the first fibers is softened or melted and then re-solidified to change the binding form of the binding tool. characterized by being retained.

According to the binding tool of the present invention, the binding form can be maintained by softening or re-solidifying the low melting point polymer in the first fibers of the inner peripheral portion of the fiber structure, so that the binding shape can be maintained. Objects such as the body can be bundled and tied well, the binding tool is also excellent as a protective material for the object, and has good moldability and ease of bending after molding. The binding form can only be maintained by softening or re-solidifying the low-melting-point polymer, and the low-melting-point polymer is not exposed on the outer surface of the fiber structure, so it is easy to remove from the object. Good.

FIG. 4 is a diagram showing an example of a cross-sectional structure of a fiber structure that constitutes the binding tool of the present invention; It is a figure which shows the example of the binding structure using the binding tool of this invention. It is a figure which shows the example of the binding structure using the other binding tool of this invention. It is a figure which shows the example of the binding structure using still another binding tool of this invention. It is a figure which shows the example of the binding structure using still another binding tool of this invention. It is a figure which shows the example of the binding structure using still another binding tool of this invention. It is a figure which shows the example of the binding structure using still another binding tool of this invention. It is a figure which shows the example of the binding structure using still another binding tool of this invention.

As illustrated in FIG. 2, the binding tool 1 of the present invention can be composed of, for example, a string-like body as shown. FIG. 2 shows a plurality of metal wires 2 as binding objects. In the example shown in FIG. 2, a long string-like binding device 1 is spirally wound around the bundled wires 2, and the low melting point polymer in the binding device 1 is softened or melted as described later. By being re-solidified later, the binding tool 1 covers the bundled wires 2, and the spiral binding form is maintained.

FIG. 1 shows an example of a cross-sectional structure of a fiber structure 3 that constitutes the binding device 1 of FIG. One or more of the fiber structures 3 shown in FIG. 1 constitute the string-like binder 1 shown in FIG. The illustrated fiber structure 3 has an inner peripheral portion 4 and an outer peripheral portion 5 in its cross-sectional structure.

The inner peripheral portion 4 is composed of an aggregate of a plurality of first fibers 6 . The first fiber 6 is composed of a core-sheath composite fiber, 7 is its core portion, and 8 is its sheath portion. The sheath portion 8 is made of a low melting point polymer, and the core portion 7 is made of a high melting point polymer having a higher melting point than the low melting point polymer of the sheath portion 8 .

The outer peripheral portion 5 of the fiber structure 3 is composed of an aggregate of a plurality of second fibers 9 and substantially free of the first fibers 6 . The second fibers 9 are composed of a high melting point polymer having a higher melting point than the low melting point polymer of the sheath 8 of the first fibers 6 . Specifically, the second fiber 9 may be any material as long as it can hold and protect the object to be bound as will be described later. For this purpose, it is preferable that the entire surface of the fiber is formed of a high-melting polymer and composed of fibers that do not contain a low-melting polymer. Alternatively, for example, it may be a core-sheath composite fiber in which a low melting point polymer is arranged in the core portion and a high melting point polymer is arranged in the sheath portion. In addition, the cross-sectional shape of the second fiber 9 is not particularly limited, and in addition to the most common circular shape, for example, a cross, a line, a rhombus, a T-shape, a Y-shape, a triangle, a quadrangle, etc. may be in the shape of The high melting point polymer of the core portion 7 of the first fiber 6 and the high melting point polymer forming the second fiber 9 may be the same polymer or different polymers. A plurality of high-melting-point polymers may be used in combination to form the fiber structure 3 .

Long fibers are preferable as the fibers 6 and 9 that contain the high melting point polymer and constitute the fiber structure 3 . However, a portion of the fiber structure 3 may contain the short spun yarn. As long fibers, it is preferable to use multifilaments, and the single filament fineness is preferably 3 to 40 decitex.

The fiber structure 3 and the binder 1 are manufactured by arranging the first and second fibers 6 and 9, and then using a method such as air entangling, twisting, and string making so as to have the above-described configuration. can do. At that time, the entangling device, twisting machine, string making machine, covering twisting machine and the like used are not particularly limited, and conventionally known ones may be used.

The high melting point polymer of the core portion 7 of the first fiber 6 and the high melting point polymer constituting the second fiber 9 are not particularly limited, and may include polyamide, aliphatic polyester, aromatic polyester, and vinylon. , polypropylene, aramid, etc. can be suitably used. Among them, polyester is particularly desirable from the viewpoint of price and strength.

As the polyester, aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and naphthalene-2,6-dicarboxylic acid, or aliphatic dicarboxylic acids such as adipic acid and sebacic acid, or esters thereof are used as acid components, and Examples thereof include homopolyester polymers or copolymers containing ethylene glycol, diethylene glycol, 1,4-butadiol, neopentyl glycol, cyclohexane-1,4-dimethanol as a diol component. These polyesters may be added or copolymerized with pentaerythritol or the like.

Furthermore, the polyester may be a biodegradable polyester. Specifically, polylactic acid-based polymers such as poly-D-lactic acid, poly-L-lactic acid, poly-D/L-lactic acid copolymer, polylactic acid stereocomplex, polybutylene succinate, and polyethylene succinate. and poly(ε-caprolactone). These may be copolymerized with other biodegradable polyester polymers.

Polyamides include polyimino-1-oxotetramethylene (nylon 4), polytetramethylene adipamide (nylon 46), polycapramide (nylon 6), polyhexamethylene adipamide (nylon 66), polyundecanamide (nylon 11), polylaurolactamide (nylon 12), polymetaxylene adipamide, or polyamide copolymers having these monomers as structural units.

The low-melting-point polymer of the sheath 8 of the first fiber 6 has a lower melting point than the high-melting-point polymer as described above. From this point and the viewpoint of recycling, it is particularly preferable to be the same as the high melting point polymer. For example, if the high-melting-point polymer of the core 7 is polyester, the low-melting-point polymer of the sheath 8 is a polyester-based polymer. Preferably, the melting point polymer is a polyamide-based polymer.

The difference between the melting point of the low melting point polymer of the core portion 7 and the melting point of the high melting point polymer of the sheath portion 8 is preferably 30° C. or more, more preferably 50° C. or more. The low-melting point polymer functions as a binder by softening or melting, and once softened or melted by heat, it solidifies. By such treatment, the fiber structure 3 is heat-set while maintaining its shape, as will be described later. That is, when the low melting point polymer softens or melts, the high melting point polymer does not melt and retains its fibrous form. The melting point of the low-melting-point polymer can be appropriately selected to a value that does not melt in the usage environment.

As a combination of a low melting point polymer and a high melting point polymer, for example, when the first fiber 6 is a polyester fiber mainly composed of polyethylene terephthalate, the low melting point polymer has a melting point higher than the boiling point of water and Copolyester having a melting point of about 120 to 220° C. lower than the melting point (260° C.) of polyethylene terephthalate is preferred. In addition, in the present invention, when the polymer does not show a melting point, the softening point is regarded as the melting point.

Various additives such as weather resistance agents, light stabilizers, heat stabilizers, pigments, colorants, flame retardants, matting agents, and antioxidants are added to the first and second fibers 6 and 9 as necessary. etc. may be added within a range that does not impair the effects of the present invention.

The content of the low-melting polymer in the fibrous structure 3 is not particularly limited, but if it is too low, the fibrous structure 3 will be difficult to heat-set, resulting in a poor function of the binder of the present invention. Conversely, if the content is too high, the fibrous structure will become hard, making it difficult to bend after molding, and the mechanical strength will also decrease. Therefore, the content of the low-melting polymer is preferably 1 to 30% by mass, more preferably 3 to 20% by mass.

The low-melting-point polymer needs to constitute at least part of the fiber surface of the first fibers 6 of the fiber structure 3 . In this case, as a mode in which the low melting point polymer is included in the first fibers 6, the first fibers 6 may be made of only the low melting point polymer, or the low melting point polymer and the above-mentioned high melting point polymer may be mixed. and a composite fiber containing. Composite fibers containing a low-melting polymer and a high-melting polymer maintain the fiber form of the high-melting-point polymer, and thus are superior in strength to fibers made only of a low-melting-point polymer. Among them, a core-sheath composite fiber in which a low melting point polymer is arranged in the sheath portion 8 and a high melting point polymer is arranged in the core portion 7 as shown in FIG. 1 is particularly preferable. The fibers containing the low melting point polymer may be either short fibers or long fibers, and these short fibers and long fibers may be used singly or in combination. Among them, it is preferable to use only long fibers.

When the first fiber 6 is a conjugated fiber, the conjugated form thereof may be any form such as a side-by-side structure or a multi-leaf structure in addition to the core-sheath structure described above.

The binding device 1 is composed of one or a plurality of fiber structures 3 as described above. shape. String-like bodies include cords, braids, ropes, and the like. A planar material such as a woven fabric, a knitted fabric, or a non-woven fabric using the fiber structure 3 may be used. It may also be a three-dimensional woven fabric or three-dimensional knitted fabric. The thickness and hardness of the binder 1 are determined based on the thickness of the first and second fibers 6 and 9, the thickness of the fiber structure 3 composed of these fibers 6 and 9, the woven and knitted fabrics and other configurations, and the like. can be selected as appropriate.

When binding an object, for example, when the object is a plurality of wires 2 shown in FIG. . In the example of FIG. 2, a string-like binding tool 1 is spirally wound around the outer periphery of a plurality of bundled wires 2 .

Then, heat treatment is performed in the winding state shown in the drawing. The heat treatment conditions are such that the low melting point polymer of the sheath portion 8 of the first fiber 6 is softened or melted, but the high melting point polymer of the core portion 7 of the first fiber 6 and the high melting point polymer of the second fiber 9 are softened or melted. Coalescing is at a temperature that allows the fiber morphology to be maintained, eg, below the melting point of the high melting point polymer. As a result, the low melting point polymers of the sheath portions 8 of the plurality of first fibers 6 of the inner peripheral portion 4 of the fibrous structure 3 shown in FIG. The portions 7 are thermally bonded to each other. Thereafter, the low-melting-point polymer is cooled and solidified again, so that the binding device 1 retains its shape while spirally wound around the bundled wires 2 . At this time, since heat shrinks during cooling and resolidification, a stable binding state can be achieved.

The method of melting the low melting point polymer of the first fibers 6 of the fiber structure 3 is not particularly limited, and for example, conventionally known methods such as irons, hot air welders, hot air dryers, and tenter machines are used. and heat treatment at a temperature at which the low melting point polymer softens or melts and the high melting point polymer does not melt. Specifically, the heat treatment is performed at a temperature equal to or higher than the melting point of the low melting point polymer. At this time, if the heat treatment temperature is lower than the melting point of the low-melting polymer, the low-melting polymer may not be sufficiently melted, failing to obtain a desired stable binding state. On the other hand, if the heat treatment temperature is set to a temperature at which even the high-melting-point polymer is affected by heat and cannot maintain its fiber form, that is, the melting temperature of the high-melting-point polymer or higher, a plurality of fibers composed of the high-melting-point polymer can be obtained. are adhered to each other, the easiness of detachment and bending of the tying device 1 after that cannot be exhibited. The heat treatment time may be appropriately selected according to the diameter of the fiber structure 3 or the binder 1, the thickness of the outer peripheral portion 5, and the like. For example, when using a hot air welder, it takes about 30 seconds to 10 minutes. The method for solidifying the low-melting-point polymer melted by heat treatment is not particularly limited, and includes air cooling, air cooling, air cooling, furnace cooling, water cooling, and the like.

As shown in FIG. 2, when bundling a plurality of wires 2 with a binding device 1, the binding device 1 is spirally wound around the bundled wires 2, and the density of the "spiral" is appropriately adjusted. Thus, the bundled wires 2 can be covered and protected by the binding tool 1. - 特許庁By forming the tie 1 in the shape of a tape, strip, sheet, tube, bag, or the like, it is possible to achieve a protective effect by sufficiently covering the bundled wires 2 .

When releasing the bound state, a force exceeding the form held by the binding member 1 may be applied to the binding member 1 . In short, since it is only necessary to apply a force to the extent that the resin binding tool 1 can be deformed, the bound state can be easily released. The binding state can also be released by reheating the binding tool 1 to melt or soften the low melting point polymer again.

The fiber structure 3 before the heat treatment is composed only of fibers composed of a polymer, and therefore is flexible. It can be carried out. After being held in the shape at the time of binding by heat treatment, the shape is held only by the adhesive action of the low-melting polymer, so that it can be deformed relatively easily as well.

From the point of view of binding performance of the binding device 1, the second fibers 9 forming the outer peripheral portion 5 of the fiber structure 3 are entirely made of a high-melting point polymer and contain a low-melting point polymer. It is preferably composed of non-woven fibers. With such a configuration, it is difficult to adhere to the wire 2, which is the object to be bound, during heat treatment for maintaining the shape, and it is easy to pull out the binding tool 1 when removing it for releasing the binding. Moreover, since it is difficult to adhere to other members, it is easy to handle during heat treatment and easy to bend after heat treatment molding.

FIG. 3 shows an example of a binding structure using a binding tool 1 of another embodiment of the present invention. In this example, compared with the long string-like binding device 1 as shown in FIG. The shape is maintained by solidifying. By arranging a plurality of such C-shaped binding tools 1 at intervals in the length direction of the wire 2, the plurality of bundled wires 2 can be well bound along the length direction. If necessary, the bundled wires 2 can be temporarily bound by another member such as a cord-like body until the binding device 1 is solidified. The member for temporary binding can be removed after the closure 1 is solidified.

FIG. 4 shows an example of a binding structure using the binding tool 1 of still another embodiment of the present invention. In this example, instead of the C-shaped binding device shown in FIG. 3, a σ-shaped binding device 1 is used. The σ-shaped binding device 1 is solidified in a state in which both ends of the string-shaped binding device 1 overlap each other along the circumferential direction. Other configurations are the same as those of the closure shown in FIG.

FIG. 5 shows an example of a binding structure using a binding tool 1 of still another embodiment of the present invention. In this example, the above-described tape-like binding tool 1 is spirally wound around the bundled wires 2 and used. When winding, as shown in the figure, the tape may be wound with a distance between the tapes, or the tape may be wound closely without leaving a distance between the tapes so that the bundled wires 2 are not exposed. may be partially overlapped. This tape-like binding tool 1 can be constituted by the fiber structure 3 having the cross-sectional structure shown in FIG. 1, like the string-like binding tool.

FIG. 6 illustrates a tape-like closure 1 similar to that shown in FIG. 5 and formed in a C-shape similar to that shown in FIG. FIG. 7 illustrates a tape-like closure 1 similar to that shown in FIG. 5 and formed in a σ shape similar to that shown in FIG.

FIG. 8 shows an example of a binding structure using the binding tool 1 of still another embodiment of the present invention. A binding tool 1 shown in FIG. 8 is in the form of a sheet-like tubular body constituted by a fiber structure 3 having the cross-sectional structure shown in FIG. If the tying tool 1 shown in the figure is made of, for example, a sheet-like knitted fabric, it is possible to provisionally hold the object to be bound, that is, the bundled wires 2 shown in the figure, due to the stretchability normally possessed by the knitted fabric. Then, by heat-treating in the temporarily held state, the binding device 1 retains its shape while covering the bundled wires 2. - 特許庁

EXAMPLES Next, the present invention will be specifically described based on examples. It goes without saying that the present invention is not limited to these examples. In the following examples and comparative examples, each physical property was evaluated according to the following criteria.

(a) Strength Measured according to JIS L-1013 with a sample length of 25 cm and a tensile speed of 30 cm/min. As a tensile tester, Autograph AG-I 5kN manufactured by Shimadzu Corporation was used.

(b) Bundling status If eight wires (made of stainless steel, 2 mm in diameter) were bundled by heat treatment, they were evaluated as ◯, and if they were not bundled, they were evaluated as x.

(c) Ease of bending Eight stainless steel wires with a diameter of 2 mm and a length of 30 cm were prepared, and at the center of the eight wires in the longitudinal direction, a binding tool was attached to a range of 12 cm along the length of the wire. and bound by heat treatment. The tester grasped one end and the other end of the obtained bundle with the right hand and the left hand, and applied a force to make the bundle into a U-shape. According to the sensory test at that time, those that were easy to bend were evaluated as "◯", and those that were difficult to bend were evaluated as "x".

(d) Ease of removal A bundle was obtained under the same conditions as in the case of "(c) Ease of bending" described above. The tester grasped the tying part of the obtained tying body with one of the left and right hands, and with the other hand, grabbed only the wire bundle part on the end side of the tying body, and pulled out the wire. The easiness of extraction at that time, that is, the easiness of removing the wire from the tying part was evaluated by a sensory test.

Example 1

(High melting point polymer and low melting point polymer)
Polyethylene terephthalate (melting point 260° C.) was used as the high melting point polymer. As a low-melting-point polymer, a copolymer polyester ( melting point 161°C) was used.

(Production of first multifilament yarn)
A high-melting polymer is placed in the core, a low-melting polymer is placed in the sheath, and the mass ratio of the core and the sheath is 73/27, and composite spinning is performed to form a first fiber of concentric type. A core-sheath composite fiber was obtained. Then, a first multifilament yarn of 560 dtex/48 f (strength 4.0 cN/dtex) was obtained using a large number of core-sheath composite fibers.

(Production of second multifilament yarn)
The high melting point polymer was melt spun to obtain a second multifilament yarn of 560 dtex/48 f (strength 4.2 cN/dtex) consisting of polyester fiber as the second fiber.

(Manufacturing of binding tool)
A braid was produced by making the first multifilament yarn into 8 square strands, and this braid was used for the inner periphery of the fiber structure. In addition, a braid was produced by making the second multifilament yarn into 8 square strands, and this braid was used for the outer peripheral portion of the fiber structure. As described above, a binder composed of a fiber structure composed of braided cords having an inner and outer layer structure was obtained.

(Bundling of linear aggregates)
Eight wires made of stainless steel and having a diameter of 2 mm, which became a linear assembly, were spirally wound with a binding tool to bind the wires.

(Heat treatment)
A binding structure is obtained in which the low-melting polymer is melted and solidified and the high-melting polymer maintains its fibrous form by performing heat treatment at 180° C. for 5 minutes in a state in which the binding is wound around the linear assembly. rice field.

Comparative example 1
The second multifilament yarn produced in Example 1 is beaten into 8 squares to produce a braid, which is used for the inner circumference, and the second multifilament produced in Example 1 is used for the outer circumference of 8 squares. A binder was obtained from the fibrous structure in which the braid obtained by beating was arranged. This binding tool was wound around the linear assembly in the same manner as in Example 1, and subjected to heat treatment in the same manner as in Example 1 to obtain a binding structure.

Comparative example 2
The first multifilament yarn produced in Example 1 is beaten into 8 squares to produce a braid, which is used for the inner periphery, and the first multifilament produced in Example 1 is used for the outer periphery with 8 squares. A binder was obtained from the fibrous structure in which the braid obtained by beating was arranged. This binding tool was wound around the linear assembly in the same manner as in Example 1, and subjected to heat treatment in the same manner as in Example 1 to obtain a binding structure.

Table 1 shows the evaluation results of the closures using the fiber structures obtained in Example 1 and Comparative Examples 1 and 2.

As shown in Table 1, the closure of Example 1 was evaluated as "good" in all items of binding state, ease of bending, and ease of removal. On the other hand, since the binder of Comparative Example 1 did not contain the low melting point polymer, the polymer did not melt and solidify even after the heat treatment, and therefore the required binding could not be achieved. Since the binding tool of Comparative Example 2 contained a low-melting-point polymer, the required binding was achieved. However, since the low-melting-point polymer was also placed on the outer periphery of the fiber structure constituting the binding, the polymer melted by the heat treatment solidified while adhering to the surface of the stainless steel wire of the linear assembly. That is, the binding member is integrated with the linear assembly, making it difficult to bend and remove.

Claims (7)

Consists of a fiber structure having an inner peripheral portion and an outer peripheral portion,
The inner peripheral portion is composed of a plurality of first fibers in which at least a part of the fiber surface is formed of a low-melting polymer.are aligned and arranged in the length direction of the fibermade up of aggregates,
The outer peripheral portion is composed of a plurality of second fibers whose entire fiber surfaces are formed of a high-melting polymer having a higher melting point than the low-melting polymer.are aligned and arranged in the length direction of the fiberConstructed by an aggregate and not including the first fiber,
The outer peripheral portion covers the inner peripheral portion so that the inner peripheral portion is not exposed to the outer surface of the fiber structure, A closure, wherein the low melting point polymer is not exposed on the outer surface of the fiber structure. 2. A tie according to claim 1, wherein the fibrous structure or structures are in the form of threads, cords, braids or ropes. 2. The closure according to claim 1, wherein the closure is formed into a tape-like, band-like, sheet-like, tubular or bag-like form by a plurality of fiber structures. 4. The closure according to claim 3, wherein the closure is made of woven fabric, knitted fabric or non-woven fabric. 5. The closure according to any one of claims 1 to 4, wherein the binding form is maintained by softening or resolidification of the low melting point polymer in the first fibers. An object to be bound is bound using the binding device according to any one of claims 1 to 4, and then the binding device is heated to a temperature below the temperature at which the high melting point polymer in the second fiber maintains the fiber form. by heat-treating at a temperature of to soften or melt the low-melting-point polymer in the first fibers and then solidify again, thereby maintaining the binding form of the binding tool. An object to be bound is bound using the binding tool according to any one of claims 1 to 4, and the low melting point polymer in the first fiber is softened or melted and then solidified again to bind the binding. A bundling structure characterized in that a bundling form is maintained by means of a tool.

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