JP2007330264A - Specific gravity-adjustable yarn with low elongation rate and abrasion resistance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn and a fishing line, containing ultra-high molecular weight polyethylene filaments which are low in elongation rate and have adjustable specific gravity or excellent abrasion resistance, and to provide a method for manufacturing the yarn and the fishing line. <P>SOLUTION: The yarn comprising at least ultra-high molecular weight polyethylene filaments and having ≤5% elongation and (a) 1.01-10.0 specific gravity or (b) 14.0 g/d strength after 1,000 number of abrasion repetitions in the abrasion test is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a low elongation yarn containing ultrahigh molecular weight polyethylene filaments and a method for producing the same.

In recent years, as fishing methods for fishing have become more sophisticated, higher performance has been demanded for fishing lines. One example of such high performance is a reduction in elongation. The smaller the elongation, the more accurately the fish faith can be taken, because it is directly reflected in the fishing results.
However, when the elongation of the yarn is lowered, there is a problem that the wear resistance is lowered. That is, decreasing the elongation causes the generation of fibrils, and therefore the wear resistance decreases.
Conventionally, there has only been a fishing line having a specific gravity of a material. On the other hand, there is a demand from the market to change the specific gravity of the fishing line delicately according to changes in the weather and the tide without being limited to the specific gravity of the material.

  Conventionally, a fishing line made of ultrahigh molecular weight polyethylene filaments is known as a low elongation fishing line. However, there has not been a fishing line that has low elongation, wear resistance, or specific gravity adjustment.

JP 2001-303467 A JP 2002-54041 A JP 2002-191274 A

  The present invention relates to a yarn including an ultrahigh molecular weight polyethylene filament that has a low elongation and can be adjusted in specific gravity or is excellent in abrasion resistance, in particular, a yarn used as a fishing line and a method for producing the same. The purpose is to provide.

As a result of earnest examination that the present inventor has achieved the above object, the inventor has a low elongation of 5% or less, and arbitrarily sets the specific gravity between about 1.01 and 10.0. We succeeded in creating a yarn that can be used. In addition, the present inventors have succeeded in creating a yarn having an elongation of 5% or less and a strength of 14.0 g / d or more after 1000 times of wear in the wear test. That is, the present inventor has overturned the conventional common sense that the decrease in elongation and the maintenance or improvement of wear resistance are contradictory to each other, and produced a yarn having both performances.
Furthermore, the present inventor has repeatedly studied and completed the present invention.

That is, the present invention
(1) A yarn comprising at least an ultrahigh molecular weight polyethylene filament, having an elongation of 5% or less and a specific gravity of 1.01 to 10.0,
(2) The yarn according to (1), wherein the outer periphery is resin-coated,
(3) The yarn according to (2), wherein the resin contains metal particles,
(4) The yarn according to (2), wherein the resin is a synthetic resin having a melt index of 0.1 g / 10 min or more,
About.

The present invention also provides:
(5) The yarn according to (1), wherein the filaments constituting the yarn are integrated with a heat-adhesive resin,
(6) The yarn according to (5), wherein the heat-adhesive resin is a hot melt adhesive,
(7) The yarn according to (5), wherein the heat-adhesive resin is a polyolefin copolymer, a polyester copolymer, or a polyamide copolymer,
(8) The yarn according to (5), wherein the melting point of the thermal adhesive resin is 50 to 160 ° C.
About.

The present invention also provides:
(9) The yarn according to (1), further comprising a filament other than the ultrahigh molecular weight polyethylene filament,
(10) The yarn according to (9) above, wherein the other filament is a filament made of a polyacetal resin.
(11) The yarn according to (9), wherein the other filament contains metal particles,
(12) The yarn according to (11), wherein the metal particles are tungsten particles,
About.

The present invention also provides:
(13) The yarn according to (9), wherein the other filament is a metal wire,
(14) The yarn according to (13), wherein the metal wire has a diameter of 0.5 mm or less,
(15) The yarn according to (13), wherein the metal wire is a lead wire,
(16) The yarn according to (13), wherein metal wire segments are embedded in the core of the yarn in a discontinuous manner at intervals in the longitudinal direction,
About.

The present invention also provides:
(17) The yarn according to (1), wherein the elongation is 3% or less,
(18) The yarn according to (1), wherein the yarn is a twisted yarn having a twist coefficient of 0.2 to 1.5.
(19) The yarn according to (1), wherein the yarn is a braid.
(20) The yarn according to (19) above, wherein the braid is 5 ° to 90 °,
(21) A fishing line comprising the yarn according to (1),
About.

The present invention also provides:
(22) A yarn comprising at least an ultra-high molecular weight polyethylene filament, having an elongation of 5% or less, and a strength of 1000 after abrasion in the abrasion test of 14.0 g / d or more,
(23) The yarn according to (22), wherein the outer periphery is coated with a resin,
(24) The yarn according to (23), wherein the resin is a synthetic resin having a melt index of 0.1 g / 10 min or more,
(25) The yarn according to (22), wherein the filament constituting the yarn is integrated with a heat-adhesive resin,
(26) The yarn according to (25), wherein the thermal adhesive resin is a hot melt adhesive,
(27) The yarn according to (25), wherein the heat-adhesive resin is a polyolefin copolymer, a polyester copolymer, or a polyamide copolymer,
(28) The yarn according to (25), wherein the thermal adhesive resin has a melting point of 50 to 160 ° C.
About.

The present invention also provides:
(29) The yarn according to (22), wherein the elongation is 3% or less,
(30) The yarn according to (22), wherein the yarn is a twisted yarn having a twist coefficient of 0.2 to 1.5.
(31) The yarn according to (22), wherein the yarn is a braid.
(32) The yarn according to (31), wherein the braid angle is 5 ° to 90 °,
(33) The yarn according to (22), wherein the fastness to friction is 4 or more,
(34) A fishing line comprising the yarn according to (22),
About.

The present invention also provides:
(35) (a) The ultra high molecular weight polyethylene filament and the additional filament are individually drawn and then combined, or (b) the ultra high molecular weight polyethylene filament and the additional filament are combined, and the composite yarn is drawn. A yarn having at least 5% elongation, comprising at least an ultrahigh molecular weight polyethylene filament, characterized in that the composite yarn obtained in (a) or (b) is coated with a resin if desired. Manufacturing method,
(36) The production method according to (35), wherein the additional filament is an ultrahigh molecular weight polyethylene filament,
(37) The production method according to (35), wherein the additional filament is a filament other than an ultrahigh molecular weight polyethylene filament,
(38) The additional filament is a filament or / and a metal wire containing metal particles, and the specific gravity of the yarn is adjusted to 1.01 to 10.0. Manufacturing method,
About.

The present invention also provides:
(39) (a) An ultra high molecular weight polyethylene filament and an additional filament are combined, and the composite yarn is coated or impregnated with a heat adhesive resin, or (b) a thread made of a heat adhesive resin, an ultra high molecular weight Comprising a polyethylene filament and an additional filament, and then subjecting the composite yarn obtained in (a) or (b) to a heat treatment and a drawing treatment, comprising at least an ultrahigh molecular weight polyethylene filament, A method for producing a yarn, the degree of which is 5% or less, and the filaments constituting the yarn are integrated with a heat-adhesive resin;
(40) The production method according to (39), wherein the additional filament is an ultrahigh molecular weight polyethylene filament,
(41) The production method according to (39), wherein the additional filament is a filament other than an ultrahigh molecular weight polyethylene filament,
(42) The additional filament is a filament or / and a metal wire containing metal particles, and the specific gravity of the yarn is adjusted to 1.01-10.0, as described in (39) above Manufacturing method,
About.

The present invention also provides:
(43) In the drawing process, the method for producing a yarn according to (35) or (39), wherein the yarn is drawn in a tapered shape,
(44) The method for producing a yarn according to (35) or (39), wherein an unstretched filament is used,
(45) The method for producing a yarn according to (35) or (39), wherein an oil agent is applied to the filament or the composite yarn before the drawing treatment,
About.

  According to the present invention, by redrawing the ultrahigh molecular weight polyethylene filament, the elongation is about 5% or less and the strength after 1000 times of wear in the wear test is 14.0 g / d or less. Yarns with excellent wear resistance can be provided. In addition, by combining other filaments and metal wires, or by including metal particles in the other filaments or coating resin, regardless of the specific gravity of ultrahigh molecular weight polyethylene, when producing a yarn There is an advantage that the specific gravity can be arbitrarily set. Furthermore, in the present invention, by combining other filaments, it is possible to provide yarns having various physical properties that cannot be obtained with ultra high molecular weight polyethylene filaments alone.

  The yarn according to the present invention has an elongation of about 5% or less, preferably about 4.0% or less, more preferably about 3.0% or less, and still more preferably about 2.7% or less. It is a feature. For example, when it comes to fishing lines, the above range is preferable for the degree of elongation because it makes it easier to catch fish faith accurately. The elongation is measured using a universal testing machine Autograph AG-100kNI (trade name, manufactured by Shimadzu Corporation) according to JIS L 1013 (1992).

In addition, it is preferable that the yarn according to the present invention has a strength of about 14.0 g / d or more, more preferably about 16.0 g / d or more after 1000 times of wear in the wear test.
The wear test is performed as follows. As a testing machine, as shown in FIG. 1, a seat belt hexagonal bar wear tester is improved and a ceramic guide 2 having a diameter of 9 mm is arranged at the hexagonal bar. The stroke length and angle of the testing machine are in accordance with JIS D 4604 (1995). The sample 1 is passed through the ceramic guide 2, one is fixed to the fixing part 4 of the drum 5, and the load 3 is applied to the other. The load is 3.3% of the maximum strength value of the sample. Reciprocate the drum 1000 times and wear the sample with a ceramic guide. And the strength of the worn part is measured. From the strength value before wear (a) and the strength value after wear (b), the residual strength value (c) calculated by the following formula: c (%) = a / b × 100 is calculated, and the value of c is high. It is determined that the wear resistance is excellent. The strength value is measured according to JIS L 1013 (1992) with a universal testing machine Autograph AG-100kNI (trade name, manufactured by Shimadzu Corporation).

  The yarn according to the present invention preferably has a specific gravity of about 1.01 to 10.0. Specific gravity is measured using an electronic hydrometer SD-200L (manufactured by Mirage Trading Co., Ltd.).

  Furthermore, the yarn according to the present invention preferably has a fastness to friction of 3 or more, more preferably 4 or more. The fastness to friction is measured according to JIS L 0849 (1996).

The yarn according to the present invention may be composed of a single filament or may be composed of a plurality of filaments, but is preferably composed of a plurality of filaments. In any case, it is a feature of the yarn according to the present invention that at least an ultrahigh molecular weight polyethylene filament is included as a filament constituting the yarn according to the present invention (hereinafter simply referred to as “component filament”).
Here, in the present invention, the “filament” may have any form of, for example, a multifilament, a monofilament, or a monomultifilament. The filament may be twisted.

When the yarn according to the present invention is composed of a plurality of filaments, it is preferable that the plurality of constituent filaments are integrated. That is, it is preferable that the arrangement of the plurality of constituent filaments is fixed. More specifically, it is preferable to have a structure that prevents the constituent filaments from shifting or falling out even when the constituent filaments are broken. Moreover, it is preferable to have a structure in which the constituent filaments do not come apart when the yarn according to the present invention is cut.
Specific examples of the yarn include (a) a yarn whose outer periphery is coated with a resin, or (b) a yarn in which constituent filaments are integrated with a heat-adhesive resin.

  A yarn comprising a plurality of constituent filaments which is an embodiment of the yarn according to the present invention and whose outer periphery is resin-coated is described in detail below. Thus, by covering the yarn with resin, for example, it prevents deformation of the twisted form or the assembled form of the yarn according to the present invention, keeps the elongation of the yarn low, and not only wear resistance. In addition, water resistance or weather resistance can be improved. In the present invention, at the time of the resin coating, the resin may cover only the outer periphery of the yarn, or the resin may penetrate into the yarn. In particular, it is preferable that the resin used for coating penetrates into the yarn and contributes to the integration of the constituent filaments.

In the above aspect, the yarn before resin coating may be an aligned yarn obtained by aligning a plurality of constituent filaments, or may be a twisted yarn obtained by adding a twist to the aligned yarn. Further, it may be a stringed yarn in which a plurality of constituent filaments are assembled.
When the yarn before resin coating is a twisted yarn, the twist coefficient K is about 0.2 to 1.5, more preferably about 0.3 to 1.2, and still more preferably about 0.4 to About 0.8 is preferable. In order to maintain the wear resistance, the twist coefficient is preferably about 0.2 or more, and in order to reduce the elongation of the yarn, the twist coefficient is preferably about 1.5 or less. The twist coefficient K is calculated from the following formula: K = t × D ^1/2 (where t: number of twists (times / m) and D: fineness (tex)). The fineness in the above formula is measured according to JIS L 1013 (1999).

  In addition, when the yarn before resin coating the outside is a string yarn, the braid angle is about 5 ° to 90 °, more preferably about 5 ° to 50 °, and still more preferably about 20 ° to 30 °. A degree of about ° is preferred. In order to maintain wear resistance, the braid angle is preferably about 5 ° or more, and in order to reduce the elongation of the yarn, the braid angle is preferably about 90 ° or less. The angle of assembly can be measured using a digital HD microscope VH-7000 (manufactured by Keyence Corporation).

  As the resin used for coating in the present invention (hereinafter, also referred to as “coating resin”), a known resin may be used as long as it can be in close contact with the constituent filament or its twisted yarn or its braided yarn. In particular, a resin that can withstand long-term use outdoors and has excellent durability characteristics such as rubbing and bending fatigue is more preferable as the coating resin. The coating resin preferably has a melt index of about 0.1 g / 10 min or more, more preferably about 0.1 g / 10 min to 1000 g / 10 min. In order to coat without impairing the tensile strength of the core yarn, it is preferable to use a coating resin having a melt index in the above range. Here, the melt index of the resin is measured with a melt indexer (L-202, manufactured by Takara Kogyo Co., Ltd.) according to a method according to JIS K 7210 (1976) “Method for testing the flow of thermoplastics”.

  Examples of the coating resin that satisfies the above-described characteristics include, for example, a polyolefin resin such as high-density polyethylene, polypropylene, or ethylene vinyl acetate copolymer or a modified product thereof, a polyamide resin such as nylon or copolymer nylon, an acrylic resin, or a resin thereof. Examples thereof include copolymerized modified products, polyurethane resins, polystyrene resins, vinyl acetate resins, polyvinyl chloride resins, and epoxy resins.

  As the coating resin used in the present invention, a resin containing metal particles may be used. By including the metal particles in this way, there is an advantage that a yarn having an arbitrary specific gravity, particularly a yarn having a large specific gravity, can be produced regardless of the specific gravity specific to the coating resin.

  Examples of the metal particles used here include those in which iron, copper, zinc, tin, nickel, tungsten and the like are used alone or as a mixture or alloy. Among them, it is preferable to use tungsten which is easy to give weight to the yarn, and therefore, the effect of increasing the specific gravity while suppressing the decrease in strength as much as possible is exhibited by addition of a small amount.

These metal particles can be applied to the present invention regardless of whether they are powdery or granular. The average particle size is about 20 μm or less, preferably about 10 μm or less. If the particle size of the metal particles is too large, the overall uniformity after mixing becomes poor, so the above range is preferable. Further, the addition amount is preferably about 1 to 90 parts by weight, more preferably about 5 to 70 parts by weight with respect to 100 parts by weight of the coating resin.
The coating resin containing the metal can be prepared by a method of melt-kneading with metal particles in a single-screw or biaxial kneader, which is a known method per se.

The yarn according to the present invention of the above aspect preferably has a strength retention of about 70% or more, preferably about 85% or more, and more preferably about 95% or more.
Here, the strength retention rate indicates how much tensile strength is maintained by the yarn of the present invention coated with the resin with respect to the tensile strength of the yarn before coating, that is, the yarn serving as the core. This is the value shown. That is, the strength retention is expressed by the following equation.
Strength retention (%) = {(Tensile strength of yarn of the present invention) / (Tensile strength of yarn before resin coating)} × 100
The tensile strength is measured with a universal testing machine Autograph AG-100kNI (trade name, manufactured by Shimadzu Corporation) according to JIS L 1013 (1992).

A yarn comprising a plurality of constituent filaments, which is an embodiment of the yarn according to the present invention, in which the constituent filaments are integrated with a heat-adhesive resin will be described in detail below.
In the present invention, the method for integrating a plurality of constituent filaments with a thermal adhesive resin is not particularly limited. For example, there is a method of integrating the constituent filaments by fusing them using a heat adhesive resin. The fusion is performed by the following method. That is, (a) the constituent filament is impregnated with a heat-adhesive resin by a known method such as immersing in a heat-adhesive resin filled in a bath, or the heat-adhesive resin is applied by a known method, Further, there is a method in which they are aligned, further twisted or stringed as desired, and then fused by applying heat. In addition, (b) a heat-adhesive resin that is a yarn (hereinafter simply referred to as “heat-adhesive resin yarn”) is used so that all constituent filaments come into contact with the heat-adhesive resin yarn. The method of arrange | positioning and twisting or making a string as needed and fusing by applying heat after that is mentioned.

The heat-adhesive resin yarn may be a yarn made from a heat-adhesive resin, or may be a yarn obtained by coating the center yarn with a heat-adhesive resin.
In the latter case, the ultra high molecular weight polyethylene filament described above or another filament other than the ultra high molecular weight polyethylene filament exemplified below is preferably used as the center yarn. It is preferable to use a center yarn having a thickness of about 10 to 50 μm.
The coating method may be any method known per se, for example, but may be carried out, for example, by impregnating a central yarn into a bath containing a heat-adhesive resin, binding an excess, and drying. The heat-adhesive resin yarn produced by coating preferably has a thickness of about 1.3 to 3 times the center yarn.

  The temperature at which the constituent filament is fused with the heat-adhesive resin is usually a temperature not lower than the melting point of the heat-adhesive resin and not higher than the melting point of the constituent filament, preferably about 50 to 200 ° C., more preferably about 50 A temperature of about ~ 160 ° C, more preferably about 60-130 ° C is suitable.

  The heat-adhesive resin used for fusing the constituent filaments preferably has a lower melting point than the melting point of the constituent filaments. Specifically, as the heat-adhesive resin, a resin having a melting point of about 50 to 200 ° C., preferably a resin having a melting point of about 50 to 160 ° C., more preferably a resin having a melting point of about 60 to 135 ° C. A resin having a melting point of around 100 ° C. is preferred. The melting point can be measured, for example, by a method according to JIS L 1013 (1999) with a known measuring instrument, for example, “DSC7” manufactured by PerkinElmer.

As such a heat-adhesive resin, a known resin may be used as long as it has the above melting point, and specific examples thereof include a polyolefin resin, a polyester resin, and a polyamide resin.
Among them, as such a heat-adhesive resin, for example, a polyolefin-based resin composed of a polyolefin copolymer mainly composed of polyethylene, polypropylene, etc., which can be softened even by heating for about 10 seconds at a temperature of about 50 ° C. The resin is preferred. A polyolefin resin having a melting point of about 100 ° C. and a low viscosity when melted is also preferable. Such a polyolefin-based resin easily exhibits fluidity even when heated for a short time, and can quickly diffuse and penetrate not only to the fiber surface but also to the center, so that an excellent adhesion function can be achieved.

  As such a heat-adhesive resin, it is more preferable to use a hot melt adhesive. The hot-melt adhesive is a 100% solids adhesive mainly composed of a thermoplastic polymer, and is applied by lowering the viscosity by heat melting and then solidifying with cooling to exert adhesive force. Refers to adhesive. In the present invention, the hot melt adhesive is not particularly limited as long as it is as described above, and a known hot melt adhesive may be used. Among them, the hot melt adhesive used in the present invention is preferably one that does not melt at about 100 ° C. or lower after curing. This is to prevent the hot melt adhesive from being melted during transportation or storage of the yarn according to the present invention, for example, to be solidified while being wound on a spool. The melting point of the hot melt adhesive is preferably lower than the melting point of the constituent filaments.

  Examples of the hot melt adhesive used in the present invention include an ethylene-vinyl acetate copolymer (EVA) adhesive, a polyethylene adhesive, a polyolefin adhesive, a thermoplastic rubber adhesive, depending on the type of the base polymer. Examples thereof include an ethylene-ethyl acrylate copolymer (EEA) adhesive, a polyvinyl acetate copolymer adhesive, and a polycarbonate (PC) adhesive. As the hot melt adhesive used in the present invention, it is particularly preferable to use a polyethylene adhesive or a polyolefin adhesive.

  The hot melt adhesive used in the present invention is more preferably a reactive hot melt adhesive. In a reactive hot-melt adhesive, a cross-linking reaction occurs after bonding and heat resistance is improved. Specifically, even if a reactive hot-melt adhesive is melted at a relatively low temperature and applied or impregnated on the constituent filaments, once the adhesive is bonded, the adhesive has a low temperature, specifically, a temperature of about 100 ° C. or less. Then it will not melt. Therefore, if a reactive hot melt adhesive is used, the possibility that the hot melt adhesive melts during transportation or storage of the yarn can be minimized.

It does not specifically limit as a reactive hot-melt-adhesive used by this invention, You may use a well-known thing. Among them, a material that melts at a relatively low temperature, specifically about 60 to 130 ° C., preferably about 70 to 100 ° C., when the adhesive is applied.
Specific examples of the reactive hot melt adhesive include the following adhesives depending on the type of crosslinking reaction. For example, (a) an ion-crosslinking hot melt adhesive that undergoes a crosslinking reaction with carboxyl groups in the polymer and polyvalent metal ions; (b) a heat-crosslinking hot melt adhesive that is heat-cured after bonding; (c) double A hot melt adhesive that performs a crosslinking reaction by irradiating a high energy beam such as an electron beam or an ultraviolet ray using a block copolymer or polyester having a bond; (d) in the air or an adherend after melt coating A moisture curable hot melt adhesive that undergoes crosslinking by reacting with existing moisture (humidity); or (e) a polymer having various functional groups and an additive or polymer that reacts with the functional groups present in the polymer. There are hot melt adhesives that melt each of the above and mix and apply immediately before application to react the two liquids to form a crosslinked structure.

The reactive hot melt adhesive used in the present invention is more preferably a heat-crosslinking hot melt adhesive or a moisture curable hot melt adhesive, and more preferably a moisture curable hot melt adhesive.
Specifically, as the heat-crosslinking hot melt adhesive, (a) a terminal carboxyl group or amino group of polyester or copolyamide, or (b) an isocyanate group introduced into the molecular terminal or side chain, caprolactam, phenol, etc. A hot melt adhesive containing a blocked isocyanate blocked with a blocking agent may be mentioned.
Specific examples of the moisture-curable hot melt adhesive include a hot melt adhesive in which an alkoxy group is introduced into a polymer, and a hot melt adhesive in which an isocyanate group or a polymer is introduced into a polymer.

  It is desirable that the weight ratio between the heat-adhesive resin and the constituent filaments is about 1: 1 to 100. When a hot melt adhesive is used as the thermal adhesive resin, the amount of hot melt adhesive applied is about 1 to 20% by weight, more preferably about 5%, based on the total weight of the yarn according to the present invention. It is suitable that it is about 10% by weight. The above range is preferable in order to prevent the heat-adhesive resin from projecting unevenness on the surface of the yarn according to the present invention and preventing loss of smoothness while obtaining sufficient adhesive strength.

  When the yarn according to the present invention of the above aspect is a twisted yarn, the twist coefficient K is about 0.2 to 1.5, more preferably about 0.3 to 1.2, and still more preferably about 0.4. About 0.8 is preferred. In order to maintain the wear resistance, the twist coefficient is preferably about 0.2 or more, and in order to reduce the elongation of the yarn, the twist coefficient is preferably about 1.5 or less. The twisting coefficient K is calculated from the above formula.

  Further, when the yarn according to the present invention of the above aspect is a stringed yarn, the braid angle is about 5 ° to 90 °, more preferably about 5 ° to 50 °, and further preferably about 20 ° to 30 °. The degree is preferred. In order to maintain wear resistance, the braid angle is preferably about 5 ° or more, and in order to reduce the elongation of the yarn, the braid angle is preferably about 90 ° or less. Note that the combination angle is measured in the same manner as described above.

The constituent filaments of the yarn according to the present invention will be described in detail below.
As the ultra high molecular weight polyethylene constituting the ultra high molecular weight polyethylene filament used in the present invention, those having a molecular weight of about 200,000 or more, preferably about 600,000 or more are suitably used. Such ultra-high molecular weight polyethylene may be a homopolymer or a copolymer with a lower α-olefin having about 3 to 10 carbon atoms such as propylene, butene, pentene, hexene and the like. As the copolymer of ethylene and α-olefin, a copolymer having an average ratio of about 0.1 to 20 and preferably an average of about 0.5 to 10 per 1000 carbon atoms is used. Is preferred.

  Methods for producing ultrahigh molecular weight polyethylene filaments are disclosed in, for example, Japanese Patent Application Laid-Open Nos. 55-5228 and 55-107506, and methods known per se may be used. Commercially available products such as Dyneema (registered trademark, manufactured by Toyobo Co., Ltd.) and Spectra (registered trademark, manufactured by Honeywell) may be used as the ultrahigh molecular weight polyethylene filament.

  The yarn according to the present invention may include a filament other than the ultra-high molecular weight polyethylene filament (hereinafter abbreviated as “other filament”).

As said other filament, the filament which can be extended | stretched is preferable. This is because the other filament is subjected to a drawing process together with the ultrahigh molecular weight polyethylene filament in the yarn manufacturing method according to the present invention. Here, the “stretchable filament” refers to a filament that can be stretched.
Specific examples of the other filaments include filaments made of synthetic resins such as polyolefin, polyamide, polyester, fluorine, polyacrylonitrile, polyvinyl alcohol, and polyacetal.

  More specifically, examples of the polyolefin resin include polyethylene and polypropylene, and among them, those having a polymerization average molecular weight of about 400,000 or more are preferable. The polyethylene or polypropylene may be a homopolymer or a copolymer. Specifically, the copolymer contains one or more alkenes copolymerizable with ethylene in a small amount, preferably about 5% by weight or less, and about 1 to 10, preferably 2 to 6 per 100 carbon atoms. Examples include copolymers having a degree of methyl or ethyl group. Examples of the alkenes copolymerizable with ethylene include propene, butene, pentene, hexene, octene, and 4-methylpentene. Examples of the copolymer include ethylene vinyl acetate copolymer (EVA).

  Examples of the polyamide-based resin include aliphatic polyamides such as nylon 6, nylon 66, nylon 12, nylon 6, 10, and copolymers thereof, or semi-aromatic polyamides formed from aromatic diamines and dicarboxylic acids or copolymers thereof. A polymer etc. are mentioned.

  Examples of the polyester resin include terephthalic acid, isophthalic acid, naphthalene 2,6 dicarboxylic acid, phthalic acid, α, β- (4-carboxyphenyl) ethane, 4,4′-dicarboxyphenyl, or 5-sodium sulfoisophthalate. An aromatic dicarboxylic acid such as an acid, an aliphatic dicarboxylic acid such as adipic acid or sebacic acid or an ester thereof, and a diol compound such as ethylene glycol, diethylene glycol, 1,4-butanediol, polyethylene glycol, or tetramethylene glycol Examples thereof include polyesters that are polycondensed or copolymers thereof.

  Examples of the fluorine-based resin include polyvinylidene fluoride, polytetrafluoroethylene, polymonochlorotrifluoroethylene, polyhexafluoropropylene, and copolymers thereof.

  Examples of the polyacrylonitrile resin include polyacrylonitrile resins that are copolymers of acrylonitrile and other polymers. Examples of the other polymer include methacrylate, acrylate, vinyl acetate, and the like, and the other polymer is preferably contained at a ratio of about 5% by weight or less.

  As a polyvinyl alcohol-type resin, the polyvinyl alcohol-type resin which is a copolymer of vinyl alcohol and another polymer is mentioned. Examples of the other polymer include vinyl acetate, ethene, and other alkenes. The other polymer is preferably contained at a ratio of about 5% by weight or less.

  The other filament used in the present invention is preferably a highly creepable filament. Here, the highly creepable filament refers to a filament that keeps its shape after stretching. More specifically, the permanent elongation when a load half the breaking strength of the fiber constituting the filament is continuously applied for 100 hours and then the load is removed is about 1% or more, preferably about 5% or more, more preferably A filament of about 10% or more is suitable as a highly creepable filament. In addition, the said permanent elongation measures elongation according to JISL1013 (1992) using the universal testing machine Autograph AG-100kNI (brand name Shimadzu Corporation make).

The other filament used in the present invention is particularly preferably a filament made of a polyacetal resin, that is, a polyacetal filament.
The polyacetal filament can be produced by a method known per se, such as melt spinning a polyacetal resin having an acetal bond in the main chain, such as polyoxymethylene. The polyacetal filaments preferably have physical properties with a tensile strength of about 4 g / d or more and an elongation of about 20% or less. The tensile strength and elongation can be measured in the same manner as described above.

Other filaments used in the present invention may contain metal particles. By including metal particles in this manner, there is an advantage that a filament having an arbitrary specific gravity, particularly a filament having a large specific gravity can be manufactured regardless of the specific specific gravity of the material constituting the filament. About the kind or content of the metal particle used here, it is completely the same as the case where a coating resin is made to contain a metal particle.
Other filaments containing metal particles used in the present invention can be produced by preparing a thermoplastic resin containing metal as described above and using a melt spinning method widely practiced from such thermoplastic resins. it can.

The other filaments used in the present invention may have a hollow structure during the melt spinning. There is an advantage that buoyancy can be given to the yarn by making other filaments into a hollow structure. In addition, by adjusting the hollow size or the like, or by further including metal particles as described above, the balance between the weight and buoyancy of the yarn when the yarn is used in a liquid such as water or seawater can be achieved. Can be set arbitrarily. As a result, for example, when the yarn according to the present invention is used as a fishing line or fishery material, there is an advantage that the settling speed of the yarn in water or seawater can be controlled.
In the case where there is one hollow, the cross section of the filament becomes partially flat at the time of production, and the strength of the filament may be lowered. Therefore, it is preferable that there are two or more hollows. There is also an advantage that a decrease in the strength of the yarn can be prevented by adopting a structure having two or more hollows. The number of hollows is not particularly limited, and can be appropriately set to, for example, two, three, four, five, six, seven, eight, nine.

  Other filaments having a hollow structure can be easily produced by melt spinning using, for example, a melt spinning apparatus equipped with a spinneret for hollow fibers capable of forming a desired number of hollows.

  As another aspect of the yarn according to the present invention, a yarn including an ultrahigh molecular weight polyethylene filament and a metal wire as constituent filaments can be mentioned. Since the metal has ductility, it can be stretched at an arbitrary stretch ratio, and the diameter is reduced by stretching. Further, as described above, the ultrahigh molecular weight polyethylene filament can be redrawn. Therefore, a combination of an ultrahigh molecular weight polyethylene filament and a metal wire makes it possible to produce a heavy yarn despite its small diameter.

As a preferable aspect of the yarn of the above aspect according to the present invention, a yarn having a core-sheath structure with a metal wire as a core can be mentioned. In particular, the diameter of the metal wire in the core is preferably about 0.5 mm or less.
As another preferable aspect of the yarn of the above aspect according to the present invention, a yarn in which metal wire segments are embedded in the longitudinal direction in a discontinuous manner in the longitudinal direction can be given. More preferably, there is a yarn in which metal wire segments are intermittently embedded in the longitudinal direction in the core of a braid composed of at least an ultrahigh molecular weight polyethylene filament.

The metal wire is not particularly limited, and a metal wire known per se may be used. Specifically, for example, copper wire, stainless steel wire, lead wire, soft wire of various alloys, and the like can be given. Among them, it is preferable to use a lead wire because it has a large specific gravity and is easy to stretch. Further, the cross section of the metal wire may be circular or flat (elliptical).
Moreover, in the yarn of the above aspect of the present invention, the constituent filament other than the metal wire may be an ultrahigh molecular weight polyethylene filament alone or may contain other filaments.

  In the present invention, the constituent filaments contain various known antiwear agents, matting agents, modifiers, ultraviolet absorbers, pigments, etc., or two or more thereof within a range not to impair the purpose of the present invention. May be. In addition, the constituent filament may contain a magnetic material, a conductive substance, a substance having a high dielectric constant, or the like.

Below, the manufacturing method of the yarn concerning this invention is described in detail.
A method for producing a yarn comprising a plurality of ultrahigh molecular weight polyethylene filaments, which is an embodiment of the yarn according to the present invention, will be described below.
The yarn of this aspect can be produced by combining a plurality of ultra high molecular weight polyethylene filaments and then drawing the composite yarn. In addition, the yarn of this aspect can also be produced by drawing an ultra high molecular weight polyethylene filament and then combining a plurality of the drawn ultra high molecular weight polyethylene filaments. In any of the above methods, it is preferable to apply an oil agent to the composite yarn or ultrahigh molecular weight polyethylene filament before drawing. By applying the oil, damage to the composite yarn or filament due to friction with the drawing machine can be reduced. In the case of a composite yarn, since the adjacent filaments are not substantially fused together by applying an oil agent, it is possible to prevent a decrease in the orientation of molecules in the filament, and as a result, There is an advantage that it is possible to prevent a decrease in tensile strength, knot strength, friction fastness, and the like due to wearing.
Here, “composite” in the present invention means that a plurality of filaments are integrated so as not to be separated from each other. For the compounding, known means may be used, for example, means for twisting, stringing, or fusing a plurality of filaments.

  Moreover, a taper shape can also be formed at the time of extending | stretching. That is, when a composite yarn composed of a plurality of ultrahigh molecular weight polyethylene filaments is drawn, a tapered shape can be formed to obtain a tapered yarn. It is also possible to obtain a tapered yarn by stretching an ultrahigh molecular weight polyethylene filament in a taper shape and then combining a plurality of ultrahigh molecular weight polyethylene filaments stretched in the taper shape. In the former case, there is an advantage that the tapered yarn according to the present invention can be easily manufactured. That is, for example, in the case where the constituent filaments are combined by fusion, the fusion can be performed at the same time as stretching in a tapered shape, and the number of steps is reduced by one. On the other hand, in the latter case, for example, when a plurality of filaments stretched in a tapered shape are combined with a string, for example, the stringer gear is changed according to the size of the diameter of the constituent filament, and the diameter of the constituent filament is increased. It is possible to make a string with an appropriate combination pitch. By doing so, there is an advantage that the smoothness of the tapered yarn according to the present invention is further improved. A method for forming a tapered shape during stretching will be described later.

  A yarn containing an ultrahigh molecular weight polyethylene filament and another filament, which is another embodiment of the yarn according to the present invention, can be produced in the same manner as described above. Here, in order to combine the ultrahigh molecular weight polyethylene filament with other filaments, a means known per se may be used, for example, twisting, stringing or fusing two types of filaments, etc. Is mentioned. Alternatively, one of the filaments may be used as a core yarn, and the other filament may be formed around the core yarn, or may be disposed and fused so as to surround the core yarn.

  A yarn comprising an ultrahigh molecular weight polyethylene filament, which is still another embodiment of the yarn according to the present invention, a metal wire, and, if desired, other filaments as constituent filaments can also be produced in the same manner as described above. . Among these, it is preferable to use a production method in which an ultrahigh molecular weight polyethylene filament, a metal wire, and, if desired, another filament are combined and then the composite yarn is drawn.

  Here, in order to combine the metal wire, the ultra high molecular weight polyethylene filament, and other filaments as desired, a means known per se may be used. For example, the metal wire, the ultra high molecular weight polyethylene filament, and, if desired, Examples include twisting other filaments, stringing, and fusing. Among them, a metal wire is used as a core yarn, and an ultra-high molecular weight polyethylene filament and, if desired, other filaments are formed around the core yarn, or arranged so as to surround the core yarn and fused. Is preferred.

In the method for producing a yarn according to the present invention as described above, the yarn used as a raw material may be a filament that has already been drawn in the production process, like a commercially available filament, or may be drawn completely in the production process. It may be a filament that is not drawn or a filament that is drawn at a draw ratio less than the draw ratio at the time of production of a commercially available filament. In the present invention, filaments that are not drawn at all in the production process or filaments that are drawn at a draw ratio that is less than the draw ratio at the time of production of commercially available filaments are collectively referred to as “unstretched filaments”. That is, the undrawn yarn used in the present invention refers to a yarn that has not been drawn at the maximum draw ratio. The maximum draw ratio means a draw ratio at which filament breakage in the filament production process does not cause a problem in production. That is, as the draw ratio during the spinning process increases, the tensile strength and stiffness of the filament increase. However, as the draw ratio increases, the draw ratio cannot be increased indefinitely because filament breakage occurs more frequently during the manufacturing process. It can be easily determined experimentally whether the draw ratio is such that breakage in which the drawing process must be interrupted occurs and the frequency of occurrence is acceptable. This draw ratio is called the maximum draw ratio.
In particular, when a tapered shape is formed during stretching, it is more preferable to use unstretched filaments as constituent filaments.

Below, the main process in manufacture of the thread | yarn which concerns on this invention is described still in detail.
In the present invention, before stretching each constituent filament or composite yarn, the method of applying an oil agent to them is not particularly limited, and a known method may be used. Specific examples of the oiling method include an immersion oiling method, a spray oiling method, a roller oiling method, a guide oiling method using a metering pump, and the like, and it is preferable to use an immersion oiling method or a spray oiling method. . Thus, when an oil agent is applied before stretching, each constituent filament or composite yarn may be washed with water after stretching if desired.

  If the oil agent used at the said process is normally used in order to be provided to a fiber, there will be no restriction | limiting in particular. Specifically, examples of the oil agent include a sizing resin (binders), a base lubricant or a surfactant, or a mixture of two or more thereof. Examples of the converging resin include polyurethane resin, silicon resin, and fluorine resin. Examples of the base lubricating oil include dimethylpolysiloxane or polyether. Surfactants include higher alcohols, higher alcohol fatty acid esters, polyoxyethylene / higher alcohol ethers, polyoxyethylene / higher fatty acid esters, polyethylene glycol / higher fatty acid esters, polyoxyethylene / alkyl amino ethers, polyoxyethylene / castor. Examples include oil ethers, alkyl phosphate ester salts (preferably alkali metal salts or amine salts), polyoxyethylene alkyl ether phosphate ester salts (preferably alkali metal salts or amine salts), and alkyl sulfonate sodium salts. These may be used alone or in combination of two or more.

  Examples of the polyurethane resin include a polymer obtained by a reaction between a polyether polyol and a polyisocyanate, or a reaction between a polycarbonate polyol and a polyisocyanate. In particular, polycarbonate is used from the viewpoint of water resistance and heat resistance. A polymer obtained by reaction of a polyol and a polyisocyanate is preferred. As the polyisocyanate, aliphatic or aromatic polyisocyanates such as hexamethylene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, triphenylmethane triisocyanate, and naphthylene diisocyanate can be used. From the viewpoint of weather resistance, aliphatic polyisocyanates are preferred.

  Examples of the silicon resin include those having a siloxane bond in the basic skeleton. Among them, hydrogen, an alkyl group having 1 to 3 carbon atoms, a phenyl group, or an alkoxy group thereof bonded to a silicon atom. Is preferred. Of these, dimethylsiloxane is particularly preferred. Furthermore, it is also preferable to use modified silicon resins such as amino-modified, epoxy-modified, and alkylene oxide-modified dimethylsiloxane, or a mixture thereof.

  Examples of the fluorine resin include a tetrafluoroethylene polymer, a trifluorinated ethylene polymer, a tetrafluoroethylene / hexafluoropropylene copolymer, a tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, Examples thereof include tetrafluoroethylene / hexafluoropropylene / perfluoroalkyl vinyl ether copolymer, vinylidene fluoride polymer, and ethylene / tetrafluoroethylene copolymer. Fluorine resin is usually used in the form of a dispersion in which a fine particle fluorine resin is dispersed in a dispersion medium using a dispersant or an aqueous emulsion in which a fine particle fluorine resin is emulsified in an aqueous medium using an emulsifier. It is preferable to do this.

In the present invention, the method of stretching each constituent filament or composite yarn is not particularly limited, and a method known per se such as stretching while heating in a liquid or gas can be adopted. Since the temperature at the time of drawing varies depending on the type of constituent filaments or the diameter of the yarn according to the present invention, it cannot be generally stated. For example, when the yarn according to the present invention is a yarn having a diameter of about 1 mm or more, the drawing treatment is preferably performed at a temperature not lower than the melting point of the constituent filament. Further, when the yarn according to the present invention is a yarn having a diameter of about 1 mm or less, the drawing treatment may be performed at a temperature equal to or higher than the melting point of the constituent filaments or may be performed at a temperature equal to or lower than the melting point. The stretching process is preferably performed at a temperature of More specifically, the temperature during stretching is about 120 to 300 ° C, preferably about 130 to 250 ° C, more preferably about 130 to 200 ° C, and still more preferably about 130 to 170 ° C.
In addition, the stretching may be performed in one stage or in two or more stages.

  What is necessary is just to select the draw ratio at the time of the said extending | stretching process suitably according to the kind of constituent filament. Further, whether or not the filament used as a raw material has already been stretched, or if it has already been stretched, how much stretch ratio is used to stretch during the stretching treatment in the present invention. Since magnification is different, it cannot be said unconditionally. Specifically, for example, the draw ratio is about 1.01 to about 15. More specifically, when a filament already stretched in the production process, such as a commercially available filament, is used as a constituent filament, the draw ratio is about 1.01 to 5, preferably about 1.01 to 3. A degree of about 2.2 to 3 is preferred. On the other hand, when the unstretched filament is used as a constituent filament, the draw ratio is about 1.01 to about 15, preferably about 2 to 10, more preferably about 4 to 8.

  In the present invention, a taper can be formed during stretching as follows. Specifically, a taper shape can be formed during stretching by adjusting the stretching speed. More specifically, increasing the stretching speed decreases the diameter in the longitudinal direction, and decreasing the stretching speed increases the diameter in the longitudinal direction. As described above, when the stretching speed is changed, it is preferable that the change in the stretching speed is gradually inclined to increase or decrease. That is, it is preferable to gradually increase or / and decrease the stretching speed during stretching. If the change in the drawing speed is such a gentle change, the drawing speed may or may not change linearly.

  Since the drawing speed at the time of drawing varies depending on the type of the constituent filament or the thickness of the yarn according to the present invention, it cannot be generally stated. For example, when stretching a composite yarn composed of a plurality of constituent filaments, the stretching speed when forming the portion with the largest yarn diameter and the stretching speed when forming the portion with the smallest yarn diameter The ratio is preferably about 1: 2 to 6. Moreover, when extending | stretching a structure filament, ratio of the extending | stretching speed at the time of forming the part with the largest diameter and the extending | stretching speed at the time of forming the part with the smallest diameter is about 1: 1.5-4. Preferably there is.

  In the present invention, the method for stringing a plurality of constituent filaments is not particularly limited, but is usually performed using a braiding machine (stringmaking machine). For example, four constituent filaments are prepared, and the right and left yarns are alternately arranged in the middle and drawn up. The number of constituent filaments used for the string is not limited to four, but may be eight, twelve or sixteen. Moreover, you may embed the core yarn which consists of a metal wire etc. in the core part of the string yarn.

  In the present invention, the method for fusing a plurality of constituent filaments is not particularly limited. As described above, a method of fusing constituent filaments using a heat-adhesive resin can be used.

  In the present invention, as a method of coating the outer periphery with a coating resin, a method known per se such as pressure extrusion coating can be employed. Of these, the pipe-type extrusion coating method is preferred. The pipe-type extrusion coating method involves extruding the molten coating resin from an extrusion molding machine and bringing the coating resin into close contact with the pre-heated core yarn under pressure. It will be excellent. In addition, for example, a coating resin may be applied using a known means such as an applicator, a knife coater, a reverse roll coater, a gravure coater, a flow coater, a rod coater, or a brush, or a molten or solution coating resin is stored. You may use the method of immersing and pulling up the yarn used as a core in a cocoon, and squeezing out the surplus quantity.

  When coating with the coating resin, the yarn according to the present invention can be tapered. As a method for forming the tapered shape, a known method may be used. For example, by changing the discharge rate of the resin by arbitrarily raising and lowering the number of revolutions of the metering pump (gear pump) incorporated in the extruder, and controlling the duration of the number of revolutions in each situation, It is possible to form a tapered shape having the respective lengths in the thick portion, the details, and the tapered portion. The shape of the taper portion can be changed according to the length of the switching time of the metering pump from high speed rotation to low speed rotation or from low speed rotation to high speed rotation.

  As described above, a preferred embodiment of the yarn according to the present invention includes a yarn in which metal wire fragments are intermittently embedded in the longitudinal direction in the core of the yarn. The yarn can be manufactured as follows. That is, a metal wire is used as a core, and a string is produced by forming a string around the metal line with a plurality of constituent filaments, and a point pressure is applied in the cross-sectional direction of the string and the metal wire is divided into pieces of metal wire. And a method of cutting and stretching. Below, each process is explained in full detail.

The string yarn can be manufactured in exactly the same manner as described above. Next, a point pressure is applied in the cross-sectional direction of the obtained string yarn to divide the metal wire into metal wire fragments. The number of metal wires to be divided or the interval between the divisions is not particularly limited. The point pressure only needs to be applied at one point in the cross-sectional direction of the raw material string yarn obtained to obtain a pressure sufficient to cut the metal wire. Further, instead of applying a point pressure in the cross-sectional direction of the obtained string yarn and cutting the metal wire, a stamping groove may be provided. However, in any of the above cases, the pressure needs to be a level that does not cut the filament constituting the string-making yarn. The method of applying pressure is not particularly limited. For example, pressure may be applied from one direction using a hammer or a gear, or multiple directions using a plurality of gears, preferably two Pressure may be applied from two directions so as to be pinched using a gear.
Thereafter, the string yarn is drawn. The stretching method is exactly the same as that described above.

  In the present invention, the dividing and stretching of the metal wire may be performed continuously instead of batchwise as described above. More specifically, the yarn of the above aspect according to the present invention is obtained by repeating the operation of applying a point pressure in the cross-sectional direction at one point of the obtained raw material string yarn and then stretching it at a desired interval. be able to. Such an operation is preferably repeated at equal intervals.

  According to the above manufacturing method, the metal wire fragments are intermittently embedded in the longitudinal direction in the core of the yarn. Thus, by making the metal wire embedded in the core part into pieces and making the part where the metal wire fragment is not embedded exist, the yarn according to the present invention can be given flexibility and flexibility.

The yarn according to the present invention may be subjected to other post-treatments known per se. For example, the yarn according to the present invention may be colored. A known method may be used as the coloring method. For example, the yarn of the present invention is passed through a bath containing a colorant solution at room temperature, for example, about 20 to 25 ° C., after which the yarn thus coated is dried and the coated yarn is passed through about 100 A colored yarn can be produced by passing through a furnace maintained at a temperature of about ~ 130 ° C.
As the colorant, inorganic pigments, organic pigments or organic dyes are known, and preferable examples include titanium oxide, cadmium compounds, carbon black, azo compounds, cyanine dyes or polycyclic pigments. .

  The yarn according to the present invention produced as described above may be used for any application as long as the elongation is required to be low. Specifically, for example, fishing lines for various leisure and fishing industries. In addition, it can be suitably used for fishery materials such as tuna fishery, rope, gut, silk thread, “weederter” thread, or surgical suture.

  Although the Example of this invention is given to the following, it cannot be overemphasized that this invention is not restricted to this.

[Example 1]
Using 8 pieces of Dyneema 150d / 140F (manufactured by Toyobo Co., Ltd.), stringing was performed with a stringing machine, and the core yarn was stringed. After this core yarn was dip-coated with acrylic resin (trade name; Boncoat 3750, manufactured by Dainippon Ink Co., Ltd.), it was fed into a heating furnace heated to 170 ° C. at a feed roller 150 m / min, and a take-up roller 345 m. The yarn according to the present invention was manufactured by winding at a speed of / min.

[Example 2]
Using four Dyneema 150d / 140F (manufactured by Toyobo Co., Ltd.) as the side yarns and one Thermolux PO105 300d (manufactured by LUXILON) as the core yarn, these are made by square punching with a stringing machine. The core yarn was manufactured. After this core yarn was dip-coated with acrylic resin (trade name; Boncoat 3750, manufactured by Dainippon Ink Co., Ltd.), it was fed into a heating furnace heated to 160 ° C. at a speed of 100 m / min. The yarn according to the present invention was manufactured by winding at a speed of / min.

Example 3
Nylon 6/66 (trade name: Novamid 2030J chip, manufactured by Mitsubishi Kasei Co., Ltd.) with high specific gravity nylon resin (MCTS00005 chip, specific gravity = 3 manufactured by Kanebo Gosei Co., Ltd.) containing metal (tungsten, specific gravity = 19.3) The monofilament was manufactured using the following conditions. That is, the high specific gravity nylon resin was supplied to an extruder having a hole diameter of 40 mm, melted at 270 ° C., spun from a spinneret having a hole diameter of 2.1 mm, and further cooled in water at 50 ° C. Subsequently, this undrawn yarn was stretched 4.5 times by 95 ° C. wet heat and 220 ° C. dry heat, and then subjected to relaxation heat treatment at 225 ° C. by 0.98 times to obtain a monofilament having a diameter of 0.515 mm. It was.
The monofilament was used as a core yarn, and the yarn around the core yarn was round-punched with eight Dyneema 150d / 140F (manufactured by Toyobo Co., Ltd.) to create a yarn that would become the core of the core-sheath structure. After this core yarn was dip coated with polyurethane resin (trade name; Bondick 1930A-LS, Dainippon Ink Co., Ltd.), it was fed into a heating furnace heated to 170 ° C. at a speed of 100 m / min. The yarn according to the present invention was produced by winding the take-up roller at a speed of 250 m / min.

Example 4
A lead wire having a diameter of 1.6 mm was used as a core, and around that, eight ultrahigh molecular weight polyethylene unstretched filaments (trade name Dyneema, manufactured by Toyobo Co., Ltd.) were used to form a string by round punching. The ultrahigh molecular weight polyethylene unstretched filament used was a 400 d filament obtained by stretching an original filament of 100 d when stretched at the maximum stretch ratio at a stretch ratio of 25% of the maximum stretch ratio.
After this raw material yarn was dip-coated with acrylic resin (trade name; Boncoat 3750, Dainippon Ink Co., Ltd.), it was fed into a heating furnace heated to 170 ° C. at a speed of 100 m / min. The yarn according to the present invention was manufactured by winding at a speed of / min.

Example 5
Twist with a twist coefficient of 1.4 was added to Dyneema 150d / 140F (manufactured by Toyobo Co., Ltd.). Eight of these twisted yarns were made by round punching. A hot-melt adhesive (trade name: HM320S, manufactured by Cemedine Co., Ltd.) was applied to the string yarn using an extruder. The application amount of the hot melt adhesive at this time was about 8% by weight with respect to the total weight of the yarn. The obtained yarn as a raw material was fed into a heating furnace heated to 160 ° C. at a feeding roller of 150 m / min, and wound up at a winding roller of 300 m / min to produce a yarn according to the present invention.

Example 6
Nylon 6/66 (trade name; Novamid 2030J chip, manufactured by Mitsubishi Kasei Co., Ltd.) and high specific gravity nylon resin containing metal (tungsten, specific gravity = 19.3) (MCTS00005 chip manufactured by Kanebo Gosei Co., Ltd., specific gravity = 3) A monofilament was produced using the following conditions. That is, the above-mentioned two kinds of chips are blended at a weight ratio of 50/50, this blend is supplied to an extruder with a pore size of 40 mm, melted at 270 ° C., spun from a spinneret with a pore size of 2.1 mm, and further 50 Cooled in an aqueous solution at 0C. Subsequently, the undrawn yarn was stretched 4.5 times by 95 ° C. wet heat and 220 ° C. dry heat and then subjected to relaxation heat treatment at 225 ° C. by 0.98 times to obtain a monofilament having a diameter of 0.515 mm. .
Using this monofilament as a core yarn, the core yarn is round-punched with eight strands of Dyneema 150d / 140F (Toyobo Co., Ltd.) (twisting factor 2.4), I made a thread that becomes. After this core yarn was dip coated with polyurethane resin (trade name; Bondick 1930A-LS, Dainippon Ink Co., Ltd.), it was fed into a heating furnace heated to 170 ° C. at a speed of 100 m / min. The yarn according to the present invention was produced by winding the take-up roller at a speed of 200 m / min.

The physical properties of the yarns obtained in Examples 1 to 5 were measured as follows.
(A) The twist coefficient K was calculated from the following formula: K = t × D ^1/2 (where t: number of twists (times / m), D: fineness (tex)). In the above formula, the fineness was measured according to JIS L 1013 (1999).
(B) Braid angle; the braid angle can be measured using a digital HD microscope VH-7000 (manufactured by Keyence Corporation).
(C) Elongation: Measured according to JIS L 1013 (1992) using a universal testing machine Autograph AG-100kNI (trade name, manufactured by Shimadzu Corporation).

(D) Abrasion resistance: The following abrasion resistance test was conducted.
As the tester, a seat belt hexagonal bar wear tester as shown in FIG. 1 was improved and a ceramic guide 2 having a diameter of 9 mm was arranged at the hexagonal bar. The stroke length, angle, etc. of the testing machine are in accordance with JIS D 4604 (1995). The sample 1 is passed through the ceramic guide 2, one is fixed to the fixing part 4 of the drum 5, and the load 3 is applied to the other. The load is 3.3% of the maximum strength value of sample 1. The drum is reciprocated 1000 times, and the sample 1 is worn by the ceramic guide 2. And the strength of the worn part is measured. From the strength value before wear (a) and the strength value after wear (b), the residual strength value (c) calculated by the following formula: c (%) = a / b × 100 is calculated, and the value of c is high. It was judged that the wear resistance was excellent. The strength value was measured with a universal testing machine Autograph AG-100kNI (trade name, manufactured by Shimadzu Corporation) according to JIS L 1013 (1992).
(G) Specific gravity: Measured using an electronic hydrometer SD-200L (manufactured by Mirage Trading Co., Ltd.).

  The yarns obtained in Examples 1 to 6 above were actually used as fishing lines, and the easiness of catching the fish faith at that time (around) was examined. All the fishing lines were easy to catch. In addition, in the yarns obtained in Examples 1 to 6, the yarn after the abrasion resistance test was observed with a microscope to examine whether or not fluff was generated. As a result, it was found that no fluff was observed in any fishing line, and no fibrils were generated.

Example 7
Dyneema 150d / 140F (manufactured by Toyobo Co., Ltd.) was string-formed with a stringing machine to produce a core yarn. This core yarn is composed of 70 parts by weight of polyether, 15 parts by weight of polyoxyethylene (number of moles of polymerization 30) / castor oil ether, 10 parts by weight of polyoxyethylene (number of moles of polymerization 10), lauryl ether and lauryl sulfonate / sodium salt. It was immersed in an oil agent consisting of 5 parts by weight. The core yarn to which the oil agent was adhered was fed into a heating furnace heated to 170 ° C. at a feeding roller 150 m / min and wound up at a winding roller 345 m / min. The core yarn wound up to remove the oil was washed with water and dried. The obtained core yarn was dip coated with an acrylic resin (trade name; Boncoat 3750, manufactured by Dainippon Ink Co., Ltd.) to produce a yarn according to the present invention.

It is the schematic of the test apparatus used for an abrasion resistance test.

Explanation of symbols

1 Ceramic guide (wear part)
2 Test sample 3 Load 4 Fixed part 5 Drum 6 Crank arm 7 Crank

Claims (28)

  A braid comprising at least an ultra high molecular weight polyethylene filament having a molecular weight of 200,000 or more, and the filaments constituting the braid are integrated by fusing with a heat-adhesive resin having a melting point lower than the melting point of the ultra high molecular weight polyethylene filament. A fishing line comprising a braid having an elongation of 4% or less.   The fishing line according to claim 1, wherein the elongation is 3% or less.   The fishing line according to claim 1 or 2, wherein the filament is twisted.   The fishing line according to any one of claims 1 to 3, wherein the braid has a braid angle of 5 ° to 90 °.   The fishing line according to any one of claims 1 to 4, wherein the heat-adhesive resin is a hot-melt adhesive.   The fishing line according to any one of claims 1 to 5, wherein the heat-adhesive resin is a polyolefin copolymer, a polyester copolymer, or a polyamide copolymer.   The fishing line according to any one of claims 1 to 6, wherein the heat-adhesive resin has a melting point of 60 to 135 ° C.   The fishing line according to any one of claims 1 to 7, further comprising a filament other than an ultrahigh molecular weight polyethylene filament having a molecular weight of 200,000 or more.   The fishing line according to claim 8, wherein the other filament is a filament made of a polyacetal resin.   The fishing line according to claim 8 or 9, wherein the other filament contains metal particles.   The fishing line according to claim 10, wherein the metal particles are tungsten particles.   The fishing line according to claim 8, wherein the other filament is a metal wire.   The fishing line according to claim 12, wherein the diameter of the metal wire is 0.5 mm or less.   The fishing line according to claim 12 or 13, wherein the metal wire is a lead wire.   The fishing line according to any one of claims 12 to 14, wherein a metal wire segment is embedded in the core portion of the yarn in a longitudinal direction at a discontinuous interval.   The fishing line according to any one of claims 1 to 15, wherein an outer periphery is coated with a resin.   The fishing line according to claim 16, wherein the resin whose outer periphery is coated with a resin contains metal particles.   18. The fishing line according to claim 16, wherein the resin whose outer periphery is coated with a resin is a synthetic resin having a melt index of 0.1 g / 10 min or more.   The fishing line according to any one of claims 1 to 18, wherein the strength after 1000 times of wear in the wear test is 14.0 g / d or more.   The fishing line according to claim 19, wherein the fastness to friction is grade 4 or higher.   (A) An ultra high molecular weight polyethylene filament having a molecular weight of 200,000 or more and an additional filament are combined, and the composite yarn is coated or impregnated with a heat adhesive resin, or (b) a yarn made of a heat adhesive resin, molecular weight The ultra-high molecular weight polyethylene filament of 200,000 or more and an additional filament are combined, and then the heat treatment and the drawing treatment are performed on the composite yarn obtained in (a) or (b). A method for producing a fishing line according to claim 1.   The method according to claim 21, wherein the additional filament is an ultrahigh molecular weight polyethylene filament.   The method according to claim 21, wherein the additional filament is a filament other than an ultrahigh molecular weight polyethylene filament.   The method according to claim 21, wherein the additional filament is a filament containing metal particles and / or a metal wire, and the specific gravity of the yarn is adjusted to 1.01 to 10.0.   The method for producing a yarn according to claim 21, wherein in the drawing treatment, the yarn is drawn in a tapered shape.   The method for producing a yarn according to claim 21, wherein undrawn filaments are used.   The method for producing a yarn according to claim 21, wherein an oil agent is applied to the filament or the composite yarn before the drawing treatment.   The fishing line according to claim 1, produced by the method of claim 21.

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