JP2002371434A - Conjugate monofilament - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conjugate monofilament in which interfacial releasability of core-sheath or sea-island is improved. SOLUTION: This conjugate monofilament comprises a core-sheath type or a sea-island type conjugate monofilament composed of different kinds of resins A and B. In the monofilament, the core component or the island component is composed of a mixed polymer in which a mixed weight ratio of the resin A to the resin B is (70/30) to (98/2) and the sheath component or the sea component is composed of a mixed polymer in which a mixed weight ratio of the resin A to the resin B is (30/70) to (2/98) and a weight ratio of the core component to the sheath component or a weight ratio of the island component to the sea component is (95/5) to (5/95).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core-sheath or sea-island type composite monofilament composed of two or more kinds of different thermoplastic resins. A composite monofilament exhibiting improved mechanical properties.

[0002]

2. Description of the Related Art Core-sheath type or sea-island type composite monofilaments using two or more different types of thermoplastic resins are provided with characteristics that cannot be exhibited by individual polymers by compensating for the characteristics of each polymer. Various studies have been made for the purpose of doing so.

[0003] Conventional techniques relating to such composite monofilaments include (A) a low-density nylon fishing line (Japanese Patent Publication No. 6-12970), (B) a composite monofilament provided with high water repellency and a fishing line (Japanese Patent Laid-Open No. 2000-2000). −
328366) and (C) a nylon fishing line with increased sensitivity (Japanese Patent Publication No. 5-24285) have already been proposed.

However, in the techniques described in the above (A) and (B), although desired effects can be obtained in imparting desired properties such as low specific gravity and high water repellency, different kinds of polymers are used. Due to the use, there is a problem that peeling is likely to occur at the interface between the polymers. Although the technique described in (C) above is a heterogeneous polymer, it is intended to improve composite interfacial peelability by combining polymers having relatively high affinity. In this respect, a certain improvement effect is recognized. However, there is a drawback that the combination of polymers is extremely limited.

[0005] With respect to special molten liquid crystalline polyesters, (D) core-sheath composite fibers and fishing line comprising the same (Japanese Patent Laid-Open No. 7-243128) and (E) core-sheath composite fibers composed of molten liquid crystalline polyester And a method for producing the same (JP-A-9-296324) have been proposed.
In the techniques described in (D) and (E), although a certain degree of effect is observed on the separation of the composite interface,
Since a very special polymer called a molten liquid crystalline polyester is used, it is not always easy to say that the same effect of improving peeling can be obtained even in relation to different polymers.

[0006]

SUMMARY OF THE INVENTION The present invention has been achieved as a result of studying to solve the above-mentioned problems in the prior art.

Accordingly, an object of the present invention is a core-sheath type or sea-island type composite monofilament composed of two or more different kinds of thermoplastic resins. It is to provide a composite monofilament exhibiting excellent mechanical properties.

[0008]

In order to achieve the above object, the composite monofilament of the present invention has a diameter of 0.05 to 0.05 which is composed of different kinds of polymers, thermoplastic resin A and thermoplastic resin B. A core-sheath type or sea-island type composite monofilament having a thickness of 5.0 mm, wherein the core component or the island component is a mixed polymer in which the weight mixing ratio of the thermoplastic resin A and the thermoplastic resin B is in the range of 70/30 to 98/2. And the sheath component or the sea component has a weight mixing ratio of the thermoplastic resin A and the thermoplastic resin B of 30/70 to 2 /.
98, and the weight ratio of the core component to the sheath component or the weight ratio of the island component to the sea component is 95/5 to 5/95, respectively.
The range is characterized by.

In the composite monofilament of the present invention, the following conditions (1) to (6) are preferable conditions, and if these conditions are satisfied, it is expected that a more excellent effect can be obtained. (1) The core component or the island component has a weight mixing ratio of 90/10 to 97 of the thermoplastic resin A and the thermoplastic resin B.
/ 3, and the sheath component or the sea component is composed of a mixed polymer in which the weight mixing ratio of the thermoplastic resin A and the thermoplastic resin B is in the range of 10/90 to 3/97. . (2) The weight ratio between the core component and the sheath component or the weight ratio between the island component and the sea component is 95/5 to 70/3, respectively.
0 range. (3) The weight ratio between the core component and the sheath component or the weight ratio between the island component and the sea component is 30/70 to 5/9, respectively.
5 range. (4) The thermoplastic resin A and the thermoplastic resin B are at least one selected from a polyamide resin, a polyester resin, a polyphenylene sulfide resin, a polyvinylidene fluoride resin, a fluororesin, and a polyolefin resin.
Be a seed. (5) The thermoplastic resin A is polyundecamide (N1
1), at least one selected from polydodecamide (N12) and a polyolefin-based resin, wherein the thermoplastic resin B is polycapramid (N6), polyhexamethylene adipamide (N66), capramid and hexamethylene adipamide And at least one selected from copolymers (N6 / 66). (6) The thermoplastic resin A is at least one selected from a polyvinylidene fluoride resin (PVdF), a polyamide resin and a polyester resin, and the thermoplastic resin B is a copolymer of tetrafluoroethylene and hexafluoropropylene. Polymer (FEP), copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether (PFA), copolymer of tetrafluoroethylene and vonylidene fluoride (VT), tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride And at least one selected from copolymers of ethylene and tetrafluoroethylene (THFE) and copolymers of ethylene and tetrafluoroethylene (ETFE).

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

The core-sheath composite monofilament referred to in the present invention is a composite monofilament in which the core component and the sheath component are each composed of two or more polymers. The shapes of the core component and the sheath component are not necessarily limited to the circular cross section, but can be any shape such as a triangular cross section, a square cross section, and a multi-leaf cross section. It does not exclude not only the sheath structure but also a multilayer core-sheath structure of three or more layers.

The sea-island composite monofilament referred to in the present invention has a structure in which a sea component and an island component are each composed of two or more kinds of polymers, and two or more island components are scattered in the sea component. It is a composite monofilament. The number of island components is not particularly limited, but is usually 2 to 19 islands,
In particular, three to thirteen islands are preferable, and the positions of the islands are not particularly limited, but are preferably arranged concentrically.

Next, in the core-sheath type or sea-island type composite monofilament of the present invention comprising the thermoplastic resin A and the thermoplastic resin B, the core component or the island component is replaced by the thermoplastic resin A and the thermoplastic resin B. Weight mixing ratio of 70
/ 30 to 98/2, preferably 90/10 to 97/3, and the weight ratio of the thermoplastic resin A and the thermoplastic resin B to the sheath component or the sea component is 30/70 to 2/98, preferably 10 / 90-
It is an important requirement to configure each with a mixed polymer in the range of 3/97.

Here, when the weight mixing ratio of the thermoplastic resin A in the core component or the island component is below the above range, or when the weight mixing ratio of the thermoplastic resin B in the sheath component or the sea component is below the above range, The composite monofilament of the present invention makes it difficult to impart properties that cannot be exhibited by the intended individual polymer alone, and the weight mixing ratio of the thermoplastic resin B in the core component or the island component is less than the above range, Thermoplastic resin A in sheath or sea component
If the weight mixing ratio is less than the above range, the effect of improving the releasability of the core-sheath or sea-island interface becomes insufficient, which is not preferable.

Further, in the core-sheath type or sea-island type composite monofilament of the present invention, the weight ratio of the core component and the sheath component or the weight ratio of the island component and the sea component is 95/5 to 5/5.
5/95, preferably 95/5 to 70/30 or 30
It is also an important requirement to be in the range of / 70 to 5/95.

Here, when the weight ratio of the core component and the sheath component or the weight ratio of the island component and the sea component is out of the above range, not only the desired properties of the composite monofilament will not be exhibited. However, operability tends to be difficult, which is not preferable.

The diameter of the composite monofilament of the present invention is
It can be selected according to its application, usually 0.05
The range of -5.0 mm, especially 0.10-3.0 mm is preferably selected.

The thermoplastic resins A and B constituting the composite monofilament of the present invention include polyamide resin, polyester resin, polyphenylene sulfide resin, polyvinylidene fluoride resin, fluororesin, and polyolefin resin. It is not limited.

Here, as a specific example of the combination of the thermoplastic resins A and B constituting the composite monofilament, for example, in order to reduce the specific gravity of the monofilament made of polyamide, the thermoplastic resin A is made of polyundecamide (N11) or polydodecamide (N12). ) And a polyolefin-based resin, wherein the thermoplastic resin B is polycapramide (N6), polyhexamethylene adipamide (N66), or a copolymer of capramide and hexamethylene adipamide (N6 / 66) At least one selected from
Seeds are examples.

As another specific example, for the purpose of improving water repellency, the thermoplastic resin A is made of at least one selected from polyvinylidene fluoride resin (PVdF), polyamide resin and polyester resin. B
Is a copolymer of tetrafluoroethylene and hexafluoropropylene (FEP), a copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether (PF
A), a copolymer of tetrafluoroethylene and vinylidene fluoride (VT), and a copolymer of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride (T
HV) and at least one selected from copolymers of ethylene and tetrafluoroethylene (ETFE).

Each of the above polymers used in the present invention includes:
If necessary, for example, various additives such as pigments, dyes, light stabilizers, ultraviolet absorbers, antioxidants, crystallization inhibitors and plasticizers, as long as the desired performance is not impaired, its polymerization process, after polymerization Alternatively, it can be added immediately before spinning.

The composite monofilament of the present invention can be efficiently produced by the method described below.

First, when the composite monofilament is melt-spun, ordinary conditions using a composite spinning machine can be adopted, and a polymer temperature of 200 to 350 ° C.
Extrusion pressure 10-500 Kg / cm ² , die hole diameter 0.1-
Conditions such as 5 mm and a spinning speed of 0.3 to 100 m / min can be appropriately selected.

Here, thermoplastic resins A and B are used to constitute the core-sheath component or the sea-island component, which is a feature of the present invention.
As a method of mixing, a chip blending method immediately before spinning, a static mixer method, a master batch method in which a desired master batch is prepared in advance and spun, and the like can be appropriately adopted.

Next, the monofilament spun from each extruder and combined into a core-sheath or sea-island structure in a die is cooled in a cooling bath after passing through a short gas zone. As a cooling medium, a liquid inert to the polymer, usually water or polyethylene glycol is used.

The composite monofilament solidified by cooling is
Subsequently, the solution is sent to the first stretching step. As the atmosphere (bath) for stretching and heat setting, a heated heat medium bath such as hot water, polyethylene glycol, glycerin and silicone oil, a dry hot gas bath and a steam bath are used. Used.

Next, single-stage to multi-stage stretching is performed, and the total stretching ratio varies depending on the thermoplastic resin constituting the monofilament, and is usually at least 5.0 times, preferably at least 5.5 times.

After the one-stage or multi-stage stretching, an appropriate constant length and / or relaxation heat treatment can be carried out for the purpose of removing the stretching strain if necessary.

The composite monofilament of the present invention obtained in this way provides properties that cannot be exhibited by individual polymers by compensating for the properties of two or more different polymers, and is a weak point of the composite monofilament. It is extremely useful for various marine materials and industrial materials because it has greatly improved the peeling property of the interface and also improved the tensile strength and knot strength, which are the basic characteristics of monofilaments. .

[0030]

EXAMPLES Next, the present invention will be described with reference to examples. The evaluation of composite monofilaments in the examples was performed according to the following method. [Interfacial peeling evaluation test method]: At the tip (circular flat cross section) of a 5.5 mmφ stainless steel round bar, a force is applied so that the width of the crushed portion becomes about 2.5 times the thickness of the yarn and crushed. The crushed portion was observed with an optical microscope (magnification: 40 times), and the degree of peeling of the interface was visually observed to determine the following three criteria.

：: No peeling was observed in an optical microscope photograph (40 times magnification).

Δ: Partial peeling was observed in an optical microscope photograph (40 times magnification).

×: Peeling is observed entirely in the optical micrograph (magnification: 40 times). [Tensile strength and knot strength]: Measured in accordance with JISL1013.

Example 1 A core component was a copolymer of capramide and hexamethylene adipamide (N6 / 66, melting point 1
95 ° C., ηr4.2) and polyundecamide (N11,
5 / Rilsan BESN-0-TL).
95 and a copolymer of capramid and hexamethylene adipamide (N6 / 66, melting point 19
5 ° C, ηr4.2) and polyundecamide (N11, Rilsan BESN-0-TL) in a weight mixing ratio of 95 /.
5 and the weight ratio of the core and sheath is 80 /
20 with an extruder-type composite spinning machine so that
The mixture was melted at 85 ° C., spun through a die having a hole diameter of 1.0 mm, and further cooled in a water bath at 20 ° C.

Next, the unstretched yarn was first stretched 3.45 times in a steam stretching bath at 100 ° C., and further stretched 1.68 times in a 180 ° C. dry heat bath (total stretching ratio). (5.8 times)
Thus, a composite monofilament was obtained.

Subsequently, the resultant was passed through a dry heat bath at 180 ° C. at a treatment magnification of 0.9 and subjected to a heat treatment to obtain a composite monofilament having a diameter of 0.235 m. Table 1 shows the evaluation results of the obtained composite monofilament.

Example 2 A core component was a copolymer of capramide and hexamethylene adipamide (N6 / 66, melting point 1
95 ° C., ηr4.2) and polyundecamide (N11,
(Rilsan BESN-0-TL) by weight.
/ 90, a copolymer of capramid and hexamethylene adipamide (N6 / 66, melting point 1)
95 ° C., ηr4.2) and polyundecamide (N11,
(Rilsan BESN-0-TL) by weight.
Except for using a mixed polymer of / 10, a composite monofilament having a diameter of 0.235 mm was obtained in the same manner as in Example 1. Table 1 shows the evaluation results of the obtained composite monofilament.

Example 3 A core component was a copolymer of capramide and hexamethylene adipamide (N6 / 66, melting point 1
95 ° C., ηr4.2) and polyundecamide (N11,
2 / Rilsan BESN-0-TL)
98 and a sheath component of a copolymer of capramide and hexamethylene adipamide (N6 / 66, melting point 19
5 ° C, ηr4.2) and polyundecamide (N11, Rilsan BESN-0-TL) at a weight mixing ratio of 98 /
Except for using the mixed polymer of No. 2, a composite monofilament having a diameter of 0.235 mm was obtained in the same manner as in Example 1.
Table 1 shows the evaluation results of the obtained composite monofilament.

Example 4 The core component was a polyvinylidene fluoride resin (PVdF, MFR, 230 ° C., 10 kg,
2.0) and a tetrafluoroethylene-hexafluoropropylene copolymer (Neoflon FEP, N
P-100), and a mixed polymer having a weight mixing ratio of 95/5 with a sheath component of polyvinylidene fluoride resin (PV
dF, MFR, 230 ° C., 10 kg, 2.0) and a mixture of tetrafluoroethylene and hexafluoropropylene copolymer (Deokin's Neophoron FEP, NP-100) in a weight ratio of 5/95. As a polymer, and the core-sheath weight ratio is 90/10,
The mixture was melted at 275 ° C. with an extruder-type composite spinning machine, spun through a 1.5 mm diameter die, and further cooled in a polyethylene glycol bath at 20 ° C.

Next, the unstretched yarn was first stretched 4.5 times in a polyethylene glycol stretching bath at 167 ° C., and further stretched 1.42 times in a dry heat bath at 140 ° C. (total). The stretching ratio was 6.4 times) to obtain a composite monofilament.

Subsequently, the mixture was passed through a dry heat bath at 155 ° C. at a treatment magnification of 0.9 and subjected to a heat treatment to give a diameter of 0.1 mm.
A 2 mm composite monofilament was obtained. Table 1 shows the evaluation results of the obtained composite monofilament.

Example 5 The core component was polyvinylidene fluoride (PVdF, MFR, 230 ° C., 10 kg: 3.6).
And a copolymer of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride (Sumitomo 3M T
HV-500G) and a mixed polymer having a weight mixing ratio of 95/5 with polyvinylidene fluoride (PV)
dF, MFR, 230 ° C., 10 kg: 3.6) and a copolymer of tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride (THV-5 manufactured by Sumitomo 3M Limited)
00G) and a weight ratio of core / sheath of 90/10 and a melting temperature of an extruder type composite spinning machine of 270 ° C. In the same manner as in Example 4, a composite monofilament having a diameter of 0.2 mm was obtained. Table 1 shows the evaluation results of the obtained composite monofilament.

Comparative Example 1 In Example 1, the core component was polyundecamide (N11, Rilsan BESN-0-T).
L) and a sheath component of a copolymer of capramide and hexamethylene adipamide (N6 / 66, melting point 19
A composite monofilament having a diameter of 0.235 mm was obtained in the same manner as in Example 1 except that a single polymer of 5 ° C and ηr4.2) was used. Table 1 shows the evaluation results of the obtained composite monofilament.

Comparative Example 2 In Example 1, the core components were a copolymer of capramide and hexamethylene adipamide (N6 / 66, melting point 195 ° C., ηr4.2) and polyundecamide (N11, Rilsan BESN-0). -TL) and a sheath component of a copolymer of capramide and hexamethylene adipamide (N
6/66, melting point 195 ° C., ηr 4.2), except that a single polymer having a diameter of 0.235 was used in the same manner as in Example 1.
mm was obtained. Table 1 shows the evaluation results of the obtained composite monofilament.

Comparative Example 3 In Example 1, the core component was a copolymer of capramide and hexamethylene adipamide (N
6/66, melting point 195 ° C., ηr4.2) and polyundecamide (N11, Rilsan BESN-0-TL) in a mixed polymer ratio of 1/99, and a sheath component of capramid and hexamethylene adipamide. Copolymer (N6 /
66, melting point 195 ° C., ηr4.2) and polyundecamide (N11, Rilsan BESN-0-TL) in the same manner as in Example 1 except that the weight mixing ratio was 99/1, and the diameter was 0.235 mm. Was obtained. Table 1 shows the evaluation results of the obtained composite monofilament.

Comparative Example 4 In Example 4, the core component was polyvinylidene fluoride (PVdF, MFR, 230 ° C.,
10Kg: 2.0), and a sheath component is a copolymer of tetrafluoroethylene and hexafluoropropylene (Neoflon FEP, NP-100 manufactured by Daikin Industries, Ltd.).
A composite monofilament having a diameter of 0.2 mm was obtained in the same manner as in Example 4 except that a single polymer was used. Table 1 shows the evaluation results of the obtained composite monofilament.

Comparative Example 5 In Example 5, the core component was polyvinylidene fluoride (PVdF, MFR, 230 ° C.,
10Kg: 3.6), and the sheath component is a copolymer of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride (THV-5 manufactured by Sumitomo 3M Limited).
A composite monofilament having a diameter of 0.2 mm was obtained in the same manner as in Example 5 except that the single polymer of 00G) was used.
Table 1 shows the evaluation results of the obtained composite monofilament.

[0048]

[Table 1] Example 6 The sea component was a copolymer of capramide and hexamethylene adipamide (N6 / 66, ηr4.2) and polyundecamide (N11, Rilsan BESN-0-T).
L) and a mixed polymer having a weight mixing ratio of 95/5, the island (three islands) component being a copolymer of capramide and hexamethylene adipamide (N6 / 66, ηr4.2), and polyundecamide ( N11, Rilsan BESN-0-T
L) and a mixed polymer having a weight mixing ratio of 5/95, and a sea-island weight ratio of 80/20,
The mixture was melted at 285 ° C. by an extruder-type composite spinning machine, spun through a die having a hole diameter of 1.0 mm, and further cooled in a water bath at 20 ° C.

Next, the unstretched yarn was first stretched 3.45 times in a steam stretching bath at 100 ° C., and further stretched 2.68 times in a dry heat bath at 180 ° C. (total stretching). Magnification 5.8
Times) to obtain a composite monofilament.

Subsequently, the mixture was passed through a dry heat bath at 180 ° C. at a treatment magnification of 0.90 times and subjected to a heat treatment to obtain a composite monofilament having a diameter of 0.235 mm. Table 2 shows the evaluation results of the obtained composite monofilament.

Comparative Example 6 The sea component was a copolymer of capramide and hexamethylene adipamide (N6 / 66, ηr4.
In the same manner as in Example 6, except that the island (three islands) component was changed to the polyundecamide (N11, Rilsan BESN-0-TL) single polymer in the single polymer of 2), the diameter was 0.2
A 35 mm composite monofilament was obtained. Table 2 shows the evaluation results of the obtained composite monofilament.

[0052]

[Table 2] As is evident from the results in Tables 1 and 2, the composite monofilaments of the present invention (Examples 1 to 6) all have good adhesion between the core-sheath and the sea-island interface, and have a better interface than the conventional composite monofilaments. Has excellent performance that the releasability of the monofilament is remarkably improved, and the tensile strength and the knot strength, which are the basic properties of the monofilament, are also improved accordingly.

On the other hand, a composite monofilament in which the core component, the sheath component, the sea component, and the island component are each a homopolymer (Comparative Examples 1, 4, 5, and 6), and a composite whose weight mixing ratio is out of the range of the present invention. The monofilaments (Comparative Examples 2 and 3) had insufficient adhesiveness at the interface, and did not sufficiently satisfy the effects intended by the present invention.

As a specific practical example, the composite monofilaments of Example 1 and Comparative Example 1 were used as a fishing line (road line), and a comparative evaluation of high breaking was performed. In the case of 1), high breakage did not occur, whereas in the case of the composite monofilament out of the range of the present invention (Comparative Example 1), high breakage was noticeable.

Here, the high break refers to a break in the line between the float and the rod tip, and is an event that is highly hated by anglers because the expensive float is washed away and lost. It is considered that the occurrence of the high breaking is partly due to the presence or absence of separation at the interface.

[0056]

As described above, in the composite monofilament of the present invention, the releasability at the interface, which is a disadvantage of the conventional composite monofilament, is remarkably improved, and the desired various properties of the composite monofilament are improved. It is very useful for various marine materials and industrial materials.

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Claims (7)

[Claims] 1. The diameter of a thermoplastic resin A and a thermoplastic resin B which are different polymers is 0.05 to
A core-sheath type or sea-island type composite monofilament of 5.0 mm, wherein the core component or the island component has a weight mixing ratio of the thermoplastic resin A and the thermoplastic resin B of 70/30 to 98.
/ 2, and the sheath component or the sea component by a mixed polymer in which the weight ratio of the thermoplastic resin A and the thermoplastic resin B is in the range of 30/70 to 2/98. A composite monofilament wherein the weight ratio of the core component and the sheath component or the weight ratio of the island component and the sea component is in the range of 95/5 to 5/95, respectively. 2. The weight ratio of the thermoplastic resin A and the thermoplastic resin B to the core component or the island component is 90/1.
Each of the sheath component and the sea component is formed by the mixed polymer in which the weight mixing ratio of the thermoplastic resin A and the thermoplastic resin B is in the range of 10/90 to 3/97. The composite monofilament according to claim 1, wherein the composite monofilament is configured. 3. The weight ratio between the core component and the sheath component or the weight ratio between the island component and the sea component is 95/5 to 5/5, respectively.
The composite monofilament according to claim 1, wherein the composite monofilament is in a range of 70/30. 4. The weight ratio of the core component and the sheath component or the weight ratio of the island component and the sea component is 30/70, respectively.
The composite monofilament according to claim 1, wherein the composite monofilament is in a range of from 5 to 95/95. 5. The method according to claim 1, wherein the thermoplastic resin A and the thermoplastic resin B are at least one selected from a polyamide resin, a polyester resin, a polyphenylene sulfide resin, a polyvinylidene fluoride resin, a fluororesin, and a polyolefin resin. The composite monofilament according to any one of claims 1 to 4, wherein 6. The thermoplastic resin A is at least one selected from polyundecamide (N11), polydodecamide (N12) and polyolefin-based resin, and the thermoplastic resin B is polycapramide (N6), polyhexamethylene. Adipamide (N66) and copolymer of capramamide and hexamethylene adipamide (N6 / 66)
The composite monofilament according to any one of claims 1 to 5, wherein the composite monofilament is at least one selected from the group consisting of: 7. The thermoplastic resin A is at least one selected from a polyvinylidene fluoride resin (PVdF), a polyamide resin and a polyester resin, and the thermoplastic resin B is a mixture of tetrafluoroethylene and hexafluoropropylene. (FEP), a copolymer of tetrafluoroethylene and perfluoroalkylvinyl ether (PFA), a copolymer of tetrafluoroethylene and carbonylidene fluoride (VT), tetrafluoroethylene, hexafluoropropylene and fluorocarbon The copolymer of at least one selected from a copolymer of vinylidene fluoride (THV) and a copolymer of ethylene and tetrafluoroethylene (ETFE). Composite monofilament.