JP6037438B2 - Manufacturing method of synthetic resin coil - Google Patents

Description

  The present invention relates to a method of manufacturing a synthetic resin coil, and more particularly to a method of easily obtaining a synthetic resin coil having an arbitrary diameter and pitch.

  Conventionally, various synthetic resin coils have been proposed instead of metal coils because they are easily rusted, have poor durability, cannot be colored, and are heavy. The present applicant has also proposed a method of manufacturing a synthetic resin coil using a fiber bundle formed of a low-melting polymer and a high-melting polymer (Patent Documents 1 and 2).

  Specifically, the synthetic resin coil manufacturing methods described in Patent Documents 1 and 2 are as follows. First, a fiber bundle including a low melting point polymer and a high melting point polymer is prepared. The fiber bundle is heat-treated in a state of being wound around the shaping shaft, the low melting point polymer is softened or melted, and the fiber bundle containing the high melting point polymer is fused and integrated, and the fiber bundle is made of synthetic resin. Coil wire. Thereafter, the synthetic resin coil wire wound around the shaping shaft is removed to obtain a synthetic resin coil.

Japanese Patent Application No. 2011-175984 Japanese Patent Application No. 2012-201922

  In the methods described in Patent Documents 1 and 2, the present invention has been devised in the method for winding a fiber bundle, and an object thereof is to easily obtain a synthetic resin coil having an arbitrary diameter and pitch.

  In the present invention, when winding a fiber bundle, a thermoplastic resin wire is spirally wound around a heat-resistant rod in advance, or at the same time, a thermoplastic resin wire is spirally wound around a heat-resistant rod. The diameter of the synthetic resin coil can be determined by the outer diameter of the heat-resistant rod, and the pitch of the synthetic resin coil can be determined by the diameter of the thermoplastic resin wire.

  That is, the invention according to claim 1 (hereinafter referred to as “first invention”) is a method in which a thermoplastic resin wire is spirally wound around a heat-resistant rod in advance, and specifically, a low melting point weight. A step of preparing a fiber bundle including a coalesced polymer and a high-melting polymer, a thermoplastic resin wire having a melting point higher than the melting point of the low-melting polymer is spirally wound and heat-set on a heat-resistant rod. A step of preparing a shaping shaft, a step of inserting the fiber bundle between the adjacent thermoplastic resin wires wound spirally, and winding the fiber bundle helically, the thermoplastic In a state where the resin wire rod and the fiber bundle are spirally wound, heat treatment is performed, and only the low melting point polymer in the fiber bundle is softened or melted, and the fiber bundle is made of synthetic resin. From the heat-resistant rod, the step of making a coil wire and the synthetic resin coil wire A method of manufacturing a synthetic resin coil and separating said thermoplastic resin wires with Rihazusu.

  The invention according to claim 2 (hereinafter referred to as “second invention”) is a method of simultaneously winding a thermoplastic resin wire and a fiber bundle around a heat-resistant rod in a spiral manner. Preparing a fiber bundle including a melting point polymer and a high melting point polymer, and arranging the fiber bundle and a thermoplastic resin wire having a melting point higher than the melting point of the low melting point polymer to form a double wire A step of preparing, the fiber bundle is wound between the thermoplastic resin wires wound spirally by winding the double wire spirally around a heat-resistant rod, and spirally wound; In the state where the thermoplastic resin wire and the fiber bundle are spirally wound, heat treatment is performed, and only the low melting point polymer in the fiber bundle is softened or melted. A step of making the fiber bundle into a synthetic resin coil wire, and The resin coil wire, a method of manufacturing a synthetic resin coil and separating said thermoplastic resin wires together removed from the heat-resistant bar.

  First, in the present invention, a fiber bundle is prepared. The fiber bundle includes a low melting point polymer and a high melting point polymer. Specifically, fibers made of a low melting point polymer and fibers made of a high melting point polymer may be mixed and bundled to form a fiber bundle, or a composite fiber made of a low melting point polymer component and a high melting point polymer component may be bundled. And it is good also as a fiber bundling body. The fiber may be a short fiber or a long fiber. In particular, in the present invention, it is preferable to use a multifilament yarn obtained by bundling core-sheath type composite continuous fibers having a low melting point polymer as a sheath component and a high melting point polymer as a core component. The low melting point polymer is preferably one that softens or melts at about 80 to 160 ° C. The high melting point polymer is one that does not soften or melt at a temperature at which the low melting point polymer softens or melts, and preferably has a softening point difference or a melting point difference of 20 ° C. or higher. Preferred combinations of the low melting point polymer and the high melting point polymer include low melting point polyester / high melting point polyester, low melting point polypropylene / high melting point polypropylene, polyethylene / polypropylene, low melting point nylon / high melting point nylon and the like.

  It is preferable that the fiber bundle has a two-layer structure in its cross section. That is, the inner layer of the fiber bundle is formed of a fiber group including a low melting point polymer and a high melting point polymer, and the surface layer is formed of a fiber group having a melting point higher than that of the low melting point polymer. Is preferred. Such a two-layer structure facilitates separation from the thermoplastic resin wire after heat treating the fiber bundle. This is because the low melting point polymer in the fiber bundle is hardly present in the surface layer, and the fiber bundle and the thermoplastic resin wire in contact with the fiber bundle are difficult to adhere during heat treatment.

  In the first invention, a shaping shaft is obtained by winding a thermoplastic resin wire in a spiral shape around a heat-resistant rod in advance. As the heat-resistant rod, a heat-resistant round bar having a smooth surface is mainly used, and a metal round bar having a smooth surface is preferably used. As the kind of the thermoplastic resin wire material, any wire material such as monofilament yarn, multifilament yarn or spun yarn can be used, but it is preferable to use a monofilament yarn having a smooth surface. This is because the smoother surface has a lower degree of adhesion to the fiber bundle during heat treatment, and is easier to separate from the synthetic resin coil wire after heat treatment. The thermoplastic resin wire has a melting point higher than that of the low melting point polymer in the fiber bundle. If the melting point of the thermoplastic resin wire is less than or equal to the melting point of the low-melting polymer, it is preferably melted or softened during the heat treatment, fused with the fiber bundle, and difficult to separate from the synthetic resin coil wire after the heat treatment. Absent. After the thermoplastic resin wire is wound in a spiral shape, it is heated and fixed in a spiral form. The heating temperature may be a temperature at which the thermoplastic resin wire is plasticized. For example, when a polyethylene terephthalate monofilament yarn having a diameter of about 1 mm is used as the thermoplastic resin wire, it is heat-set in a spiral form at a heating temperature of about 180 ° C. for a heating time of about 5 minutes.

  The thermoplastic resin wire is wound spirally at an arbitrary pitch. In FIG. 1, although the example which provided the fixed clearance gap and wound between the adjacent thermoplastic resin wires 1 was shown, it does not interfere even if there is no clearance gap. In the former case, the fiber bundling body 3 is inserted into this gap and is wound spirally. In the latter case, if the heat-resistant round bar 2 having a smooth surface is used, the thermoplastic resin wire 1 having a spiral shape moves freely in the vertical direction, and the fiber bundle 3 is adjacent to the thermoplastic resin. It is inserted between the wire making materials 1 and 1. In any case, the pitch of the wound fiber bundle 3 is (the diameter of the thermoplastic resin wire 1 + the diameter of the fiber bundle 3). The heat-resistant round bar 2 may be any one that is not affected at all when the thermoplastic resin wire 1 is heat-set and when the fiber bundle 3 is heat-treated. Specifically, it is preferable to use a metal round bar. Since the fiber bundle 3 is spirally wound around this round bar, its diameter is determined by the diameter of the round bar. That is, if the shaping shaft of the present invention is used, the diameter of the spiral wound by the diameter of the round bar 2 can be determined, and the pitch can be determined by the diameters of the thermoplastic resin wire 1 and the fiber bundle 3. is there. When the invention described in Patent Document 2 is used, the diameter of the round bar 2 does not correspond to the diameter of the spiral, and the pitch does not correspond to the total diameter of the thermoplastic resin wire 1 and the fiber bundle 3. However, even in this case, the diameter of the spiral can be determined by the diameter of the round bar 2, and the pitch can also be determined by the sum of the diameters of the thermoplastic resin wire 1 and the fiber bundle 3. Further, even if the round bar is not used as the heat-resistant bar and the cross section has another shape such as an ellipse, the diameter of the fiber bundle 3 wound spirally is determined by the diameter. Needless to say.

  In the second invention, the fiber bundle 3 and the thermoplastic resin wire 1 are aligned to prepare a double wire without spirally winding only the thermoplastic resin wire 1 around the heat-resistant round bar 2. The double wire is wound around the heat-resistant round bar 2 in a spiral manner. When winding the multi-wire body, the fiber bundle 3 is inserted between the spirally wound thermoplastic resin wires 1 to be in a spirally wound state. In other words, the fiber bundle 3 and the thermoplastic resin wire 1 are spirally wound around the heat-resistant round bar 2 while maintaining the parallelity of the fiber bundle 3 and the thermoplastic resin wire 1 without twisting the double wire. Thereby, also in the case of the second invention, the diameter of the spiral can be determined by the diameter of the heat-resistant round bar 2, and the pitch can also be determined by the sum of the diameters of the thermoplastic resin wire 1 and the fiber bundle 3.

  In either case of the first invention or the second invention, the thermoplastic resin wire 1 and the fiber bundling body 3 are spirally wound around the heat-resistant round bar 2, and heat treatment is performed in this state. Apply. The heat treatment condition is a temperature at which only the low-melting polymer in the fiber bundle 3 is softened or melted. That is, the high melting point polymer retains the original fiber form, and only the low melting point polymer is softened or melted. As a result, the fiber bundle 3 is fused with the high melting point polymer in the form of fibers by the low melting point polymer, and the synthetic resin coil wire 3 ′ in which the entire fiber bundle 3 is integrated is obtained. And in this synthetic resin coil wire 3 ', the high melting point polymer exists in a state in which the original fiber form is maintained. Thereafter, the synthetic resin coil wire 3 ′ is cooled and removed from the heat resistant round bar 2 together with the thermoplastic resin wire 1. Then, by separating the synthetic resin coil wire 3 ′ from the thermoplastic resin wire 1, a synthetic resin coil can be obtained.

  According to the method of the present invention, various diameters can be selected as the heat-resistant rod, and various diameters can be selected as the thermoplastic resin wire, and a synthetic resin having an arbitrary diameter and an arbitrary pitch can be selected. There exists an effect that the coil made can be obtained.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples. The present invention is interpreted as being based on the technical idea that a synthetic resin coil having an arbitrary diameter and pitch can be obtained because the shaping shaft is constituted by both the heat-resistant rod and the thermoplastic resin wire. Should be.

(Preparation of fiber bundle)
A copolymer polyester having a melting point of 161 ° C. was prepared as a low melting point polymer, and polyethylene terephthalate having a melting point of 260 ° C. was prepared as a high melting point polymer. Then, by a composite melt spinning method, a core-sheath type composite long fiber having a fineness of about 11 dtex, in which a low melting point polymer was constituted by a sheath component and a high melting point polymer was constituted by a core component, was obtained. The mass ratio of the sheath component to the core component was sheath component: core component = 1: 2.7. 96 core-sheath type composite long fibers were bundled to obtain a multifilament yarn of 1100 dtex / 96 filaments. Further, this multifilament yarn was made into eight squares to obtain a braid. The diameter of the obtained braid was 1.0 mm, and this was used as a fiber bundle.

(Preparation of shaping axis)
A stainless steel round bar having a smooth surface and a diameter of 6 mm was prepared. A monofilament yarn made of polyethylene terephthalate having a diameter of 0.7 mm was prepared. The polyethylene terephthalate constituting the monofilament yarn is the same as the high melting point polymer having the melting point of 260 ° C. Then, the monofilament yarn was wound around a stainless steel round bar in a spiral shape (with the adjacent monofilament yarns in contact with each other in contact). And in this winding state, it heat-fixed by heating for 5 minutes at 180 degreeC. The shaping shaft was prepared as described above.

(Manufacture of synthetic resin coils)
The braid was inserted between the monofilament yarns adjacent to the shaping shaft, and the braid was wound spirally. Then, while maintaining this state, the hot air treatment was performed at 180 ° C. for 10 minutes, followed by air cooling. As a result, the sheath component of the core-sheath type composite long fiber in the braid was softened or melted and fused, resulting in a synthetic resin coil wire in which the core-sheath type composite long fiber in the braid was integrated. Thereafter, the stainless steel round bar was pulled out, the monofilament yarn and the synthetic resin coil wire wound spirally were removed, and the monofilament yarn and the synthetic resin coil wire were further separated to obtain a synthetic resin coil. . The resultant synthetic resin coil had a diameter of 6 mm and a pitch of 1.7 mm. That is, the diameter of the synthetic resin coil corresponds to the diameter of the round bar, and the pitch corresponds to the sum of the diameters of the multifilament yarn and braid. Therefore, according to the present Example, it can be seen that the diameter and pitch of the synthetic resin coil can be determined by the diameter of the round bar and the diameters of the braid and monofilament yarn.

It is a top view of the shaping axis | shaft which wound the thermoplastic resin wire rod around the round bar spirally. It is the top view which showed the state which wound the fiber focusing body around the shaping axis | shaft helically.

1 Wire made of thermoplastic resin 2 Heat-resistant round bar with smooth surface 3 Fiber bundle 3 'Coil wire made of synthetic resin

Claims (6)

Preparing a fiber bundle including a low-melting polymer and a high-melting polymer;
A step of preparing a shaping shaft by spirally winding a thermoplastic resin wire having a melting point higher than the melting point of the low melting point polymer on a heat-resistant rod,
Inserting the fiber bundle between the adjacent thermoplastic resin wires wound spirally, and winding the fiber bundle spirally;
In a state where the thermoplastic resin wire and the fiber bundle are spirally wound, heat treatment is performed, and only the low-melting-point polymer in the fiber bundle is softened or melted to obtain the fiber bundle. A process for producing a synthetic resin coil wire, and removing the synthetic resin coil wire from the heat resistant rod and separating the synthetic resin coil wire from the thermoplastic resin wire. Preparing a fiber bundle including a low-melting polymer and a high-melting polymer;
Preparing a double wire by aligning the fiber bundle and a thermoplastic resin wire having a melting point higher than the melting point of the low melting point polymer;
The fiber bundle is inserted between the thermoplastic resin wires wound spirally and wound in a spiral manner by spirally winding the double wire body around a heat-resistant rod. Process,
In a state where the thermoplastic resin wire and the fiber bundle are spirally wound, heat treatment is performed, and only the low-melting-point polymer in the fiber bundle is softened or melted to obtain the fiber bundle. A process for producing a synthetic resin coil wire, and removing the synthetic resin coil wire from the heat resistant rod and separating the synthetic resin coil wire from the thermoplastic resin wire.   The synthetic resin according to claim 1 or 2, wherein the fiber bundle is composed of multifilament yarns obtained by bundling core-sheath composite long fibers having a low melting point polymer as a sheath component and a high melting point polymer as a core component. A method for producing a coil.   The fiber bundling body is formed of a fiber group including a low melting point polymer and a high melting point polymer in its inner layer, and the surface layer is formed of a fiber group having a melting point higher than the melting point of the low melting point polymer. A method for producing a synthetic resin coil according to claim 1 or 2.   The method for producing a synthetic resin coil according to claim 1 or 2, wherein the heat-resistant bar is a round metal bar having a smooth surface.   The method for producing a synthetic resin coil according to claim 1 or 2, wherein the thermoplastic resin wire is a monofilament yarn.

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