JP5585010B2 - Artificial feather - Google Patents

Description

  The present invention relates to an artificial feather excellent in elasticity of a rod-shaped portion.

  With the recent increase in awareness of environmental issues, there has been a movement in product development that is conscious of nature conservation, and switching from natural materials such as bamboo, wood, bones and feathers to artificial materials such as plastic is being studied. Since these natural materials are lightweight and have a high elastic modulus, it is extremely difficult to maintain these features even if they are simply formed of the same shape with artificial materials, and there are currently only some products.

  It is difficult to switch from natural materials to wings, and it is difficult to achieve both the good fluidity of artificial materials filling thin wings and the supple elastic modulus when used as wings. 1-6 are proposed.

  Patent Documents 1, 3, 5 and 6 describe a method of obtaining a molded product using a fiber reinforced resin filled with high elastic modulus reinforcing fibers such as glass fibers, and Patent Document 2 discloses a thermoplastic long-fiber nonwoven fabric made of polyester. As a method for imparting a binder resin, Patent Document 4 proposes a method using a polymer alloy, but in either case, there is a problem that it is difficult to achieve both good fluidity and elastic modulus.

JP 2008-206970 A JP 2008-279179 A JP-A-8-98908 Japanese Patent Laid-Open No. 61-234883 JP 59-69086 JP 53-40335 A

  The present invention has been achieved as a result of studying the solution of the problems in the prior art described above as an issue. Accordingly, an object of the present invention relates to an artificial feather having a light weight and a high elastic modulus and excellent in elasticity of a rod-shaped portion.

  As a result of intensive studies to solve the above problems, the present inventors have found that a high elastic modulus can be realized by using a liquid crystalline resin composition, and have completed the present invention.

（ただし式中のＲ１は、

から選ばれた一種以上の基を示し、Ｒ２は、

から選ばれた一種以上の基を示す。また、式中Ｘは、水素原子または塩素原子を示し、構造単位（ＩＩ）および（ＩＩＩ）の合計と構造単位（ＩＶ）は実質的に等モルである。）
２．前記液晶性樹脂組成物が、
上記の（Ｉ）、（ＩＩ）および（ＩＶ）の構造単位からなる液晶性ポリエステル、
（Ｉ）、（ＩＩ）、（ＩＩＩ）および（ＩＶ）の構造単位からなる液晶性ポリエステル、ならびに（Ｉ）、（ＩＩＩ）および（ＩＶ）の構造単位からなる液晶性ポリエステル、
からなる群より選ばれる少なくとも１種の液晶性樹脂を含有する液晶性樹脂組成物である、上記１記載の人口羽根
３．棒状軸の先端部分にゲート位置が存在する上記１または２記載の人工羽根、
４．棒状部分の最大厚みが５〜０．５ｍｍ、扇状部分の最大厚みが１〜０．０５ｍｍである上記１〜３のいずれかに記載の人工羽根、である。 That is, the present invention
1. An artificial feather composed of a liquid crystalline resin composition and composed of a rod-shaped shaft and a fan-shaped thin portion , wherein the liquid crystalline resin composition is:
A liquid crystalline polyester comprising the following structural units (I), (II) and (IV):
A liquid crystalline polyester comprising structural units of (I), (II), (III) and (IV), a liquid crystalline polyester comprising structural units of (I), (III) and (IV),
a liquid crystalline polyester comprising 57 molar equivalents of structural units produced from p-acetoxybenzoic acid and 22 molar equivalents of structural units produced from 6-acetoxy-naphthoic acid,
An artificial feather, which is a liquid crystalline resin composition containing at least one liquid crystalline resin selected from the group consisting of liquid crystalline polyesteramides.

(However, R1 in the formula is

One or more groups selected from R2

One or more groups selected from X in the formula represents a hydrogen atom or a chlorine atom, and the total of the structural units (II) and (III) and the structural unit (IV) are substantially equimolar. )
2. The liquid crystalline resin composition is
A liquid crystalline polyester comprising the structural units of (I), (II) and (IV) above;
A liquid crystalline polyester comprising structural units of (I), (II), (III) and (IV), and a liquid crystalline polyester comprising structural units of (I), (III) and (IV),
2. The artificial feather according to 1 above, which is a liquid crystalline resin composition containing at least one liquid crystalline resin selected from the group consisting of
3 . The artificial feather according to 1 or 2 above, wherein a gate position is present at the tip of the rod-shaped shaft,
4 . The artificial feather according to any one of the above items 1 to 3, wherein the maximum thickness of the rod-shaped portion is 5 to 0.5 mm and the maximum thickness of the fan-shaped portion is 1 to 0.05 mm.

  According to the present invention, as will be described below, since a good-flowing liquid crystalline resin is used, an artificial feather having a thin blade having a light weight and a high elastic modulus can be obtained. Since it can be easily obtained, it is useful for products using blades as part of parts, such as a badminton shuttle.

It is the schematic which shows an example of embodiment of the artificial feather based on this invention.

  The artificial feather of the present invention comprises a liquid crystalline resin composition. Since the liquid crystalline resin (A) used in the present invention has good fluidity that can be filled with thin blades, for example, an artificial blade having thin blades can be produced. Examples of the liquid crystalline resin (A) used in the present invention include liquid crystalline polyesters and liquid crystalline polyester amides that form an anisotropic molten phase, and specific examples thereof include aromatic oxycarbonyl units and aromatic dioxy units. , A liquid crystalline polyester forming an anisotropic melt phase comprising a structural unit selected from an aromatic dicarbonyl unit, an ethylenedioxy unit, and the like, and the structural unit and an aromatic iminocarbonyl unit, an aromatic diimino unit, an aromatic Examples thereof include liquid crystalline polyesteramides that form an anisotropic molten phase composed of structural units selected from iminooxy units and the like.

  Examples of the liquid crystalline polyester that forms the anisotropic melt phase are preferably liquid crystalline polyesters comprising the following structural units (I), (II), and (IV), (I), (II), ( Examples thereof include liquid crystalline polyesters composed of structural units III) and (IV) and liquid crystalline polyesters composed of structural units (I), (III) and (IV).

(However, R1 in the formula is

  One or more groups selected from R2

One or more groups selected from X in the formula represents a hydrogen atom or a chlorine atom, and the total of the structural units (II) and (III) and the structural unit (IV) are substantially equimolar. )

  The structural unit (I) is a structural unit of a polyester formed from p-hydroxybenzoic acid, and the structural unit (II) is 4,4′-dihydroxybiphenyl, 3,3 ′, 5,5′-tetramethyl. -4,4'-dihydroxybiphenyl, hydroquinone, t-butylhydroquinone, phenylhydroquinone, methylhydroquinone, 2,6-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 2,2-bis (4-hydroxyphenyl) propane and 4 , 4′-dihydroxydiphenyl ether, a structural unit generated from one or more aromatic dihydroxy compounds, structural unit (III) is a structural unit generated from ethylene glycol, structural unit (IV) is terephthalic acid, Isophthalic acid, 4,4'-diphenyldicarboxylic acid 2,6-naphthalenedicarboxylic acid, 4,4′-diphenyl ether dicarboxylic acid, 1,2-bis (phenoxy) ethane-4,4′-dicarboxylic acid and 1,2-bis (2-chlorophenoxy) ethane-4, Each of the structural units generated from one or more aromatic dicarboxylic acids selected from 4′-dicarboxylic acids is shown. Of these, R1 is

And R2 is

Are particularly preferred.

  Examples of liquid crystalline polyesteramides include 6-hydroxy-2-naphthoic acid, liquid crystalline polyesteramide formed from p-aminophenol and terephthalic acid, p-hydroxybenzoic acid, 4,4′-dihydroxybiphenyl and terephthalic acid. Examples thereof include liquid crystalline polyesteramides (Japanese Patent Laid-Open No. 64-33123) produced from acids, p-aminobenzoic acid and polyethylene terephthalate.

  The liquid crystalline polyester that can be preferably used in the present invention is a copolymer comprising the above structural units (I), (II) and (IV), or comprising (I), (II), (III) and (IV). It is a copolymer, and the copolymerization amount of the structural units (I), (II), (III) and (IV) is arbitrary. However, the following copolymerization amount is preferable from the viewpoint of fluidity.

  That is, when the structural unit (III) is included, the total of the structural units (I) and (II) is the structural units (I) and (II) in terms of heat resistance, flame retardancy, and mechanical properties. And 60-95 mol% is preferable with respect to the sum total of (III), and 75-93 mol% is more preferable. Moreover, 40-5 mol% is preferable with respect to the sum total of structural unit (I), (II), and (III), and, as for structural unit (III), 25-7 mol% is more preferable. The molar ratio [(I) / (II)] of the structural unit (I) to the structural unit (II) is preferably 75/25 to 95/5 from the viewpoint of the balance between heat resistance and fluidity. Preferably it is 78 / 22-93 / 7. The structural unit (IV) is substantially equimolar to the total of the structural units (II) and (III).

  On the other hand, when the structural unit (III) is not included, the structural unit (I) is preferably 40 to 90 mol% based on the total of the structural units (I) and (II) from the viewpoint of fluidity. 60 to 88 mol% is particularly preferable. The structural unit (IV) is substantially equimolar with the structural unit (II).

  In the above, “substantially equimolar” means that the unit constituting the polymer main chain excluding the terminal is equimolar of the dioxy unit and the dicarbonyl unit, but the unit constituting the terminal is not necessarily equimolar. Means not limited.

  In addition, when polycondensating the liquid crystalline polyester that can be preferably used in the present invention, in addition to the components constituting the structural units (I) to (IV), 3,3′-diphenyldicarboxylic acid, 2,2 ′ Aromatic dicarboxylic acids such as diphenyldicarboxylic acid, aliphatic dicarboxylic acids such as adipic acid, azelaic acid, sebacic acid, dodecanedioic acid, alicyclic dicarboxylic acids such as hexahydroterephthalic acid, chlorohydroquinone, methylhydroquinone, 4, Aromatic diols such as 4′-dihydroxydiphenyl sulfone, 4,4′-dihydroxydiphenyl sulfide, 4,4′-dihydroxybenzophenone, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,4 -Cyclohexanediol, 1,4-cyclohexane dimethyl In addition, an aliphatic group such as a diol, an alicyclic diol, an aromatic hydroxycarboxylic acid such as an m-hydroxybenzoic acid and a 2,6-hydroxynaphthoic acid, and the like are further added in a small proportion within a range that does not impair the object of the present invention. It can be polymerized.

  Further, examples of the liquid crystalline polyester amide preferably include those obtained by copolymerizing p-aminophenol and / or p-aminobenzoic acid with the above preferred liquid crystalline polyester.

  The method for producing the liquid crystalline resin in the present invention is not particularly limited, and can be produced according to a known polyester polycondensation method.

For example, in the production of the liquid crystalline polyester that is preferably used, when the structural unit (III) is not included, the following production methods (1) and (2) include the structural unit (III). ) Is preferably mentioned.
(1) Deacetic acid polycondensation reaction from diacylated products of aromatic dihydroxy compounds such as p-acetoxybenzoic acid and 4,4′-diacetoxybiphenyl, 4,4′-diacetoxybenzene, and aromatic dicarboxylic acids such as terephthalic acid A method for producing a liquid crystalline polyester.
(2) Acetic anhydride is reacted with aromatic dihydroxy compounds such as p-hydroxybenzoic acid and 4,4'-dihydroxybiphenyl and hydroquinone, and aromatic dicarboxylic acids such as terephthalic acid and isophthalic acid to acylate phenolic hydroxyl groups. And then producing a liquid crystalline polyester by a deacetic acid polycondensation reaction.
(3) In the presence of a bis (β-hydroxyethyl) ester of an aromatic dicarboxylic acid such as a polyester polymer such as polyethylene terephthalate, an oligomer, or bis (β-hydroxyethyl) terephthalate, by the method of (1) or (2) A method for producing a liquid crystalline polyester.

  Although these polycondensation reactions proceed even without a catalyst, it is sometimes preferable to add a metal compound such as stannous acetate, tetrabutyl titanate, potassium acetate and sodium acetate, antimony trioxide, and metal magnesium.

  Some (A) liquid crystalline resins in the present invention are capable of measuring logarithmic viscosity in pentafluorophenol. In that case, the value measured at 60 ° C. at a concentration of 0.1 g / dl is 0. 5 dl / g or more is preferable, and when the structural unit (III) is included, 1.0 to 3.0 dl / g is preferable, and when the structural unit (III) is not included, 2.0 to 10.0 dl / g is preferable. Is preferred.

  In addition, the melt viscosity of the (A) liquid crystalline resin in the present invention is preferably 1 to 2,000 Pa · s, and more preferably 2 to 1,000 Pa · s.

  In addition, said melt viscosity is the value measured with the Koka flow tester on condition of melting | fusing speed | rate (Tm) +10 degreeC of liquid crystalline resin, and the conditions of a shear rate of 1,000 / sec.

  Here, the melting point (Tm) refers to the endothermic peak temperature Tm1 observed when the polymer is measured by differential calorimetry at room temperature from 20 ° C./min, and then the temperature is increased to Tm1 + 20 ° C. This is the endothermic peak temperature observed when the temperature is kept at the same temperature for 5 minutes, then cooled to room temperature under a temperature drop condition of 20 ° C./min, and then measured again under a temperature rise condition of 20 ° C./min.

  Although the liquid crystalline resin composition used in the present invention usually uses only (A) liquid crystalline resin, it is possible to improve molding processability by adding (B) a higher fatty acid metal salt. The higher fatty acid herein means a fatty acid having 12 or more carbon atoms, preferably a fatty acid having 12 to 22 carbon atoms, and specific examples thereof include lauric acid, myristic acid, palmitic acid, stearic acid, olein. Examples include acids and behenic acid. Further, as the higher fatty acid metal salt used in the present invention, those having a melting point of 130 ° C. or higher are preferable from the viewpoint of molding processability of the obtained liquid crystalline resin composition, and those having a melting point of 200 ° C. or higher are more preferable. . Specifically, calcium stearate, calcium laurate, calcium behenate, barium stearate, barium laurate, barium behenate, aluminum stearate, lithium stearate, lithium behenate, potassium stearate, and sodium stearate are used. Preferably, barium stearate, barium laurate, barium behenate, lithium stearate, lithium behenate, potassium stearate, and sodium stearate are used, more preferably lithium stearate, potassium stearate, and lithium behenate. Is used.

  In the present invention, the melting point of the higher fatty acid can be measured by the endothermic peak temperature observed when the temperature is measured from the room temperature to 20 ° C./min by differential calorimetry.

  The (B) higher fatty acid metal salt is usually used in an amount of 1.0 part by weight or less with respect to 100 parts by weight of the liquid crystalline resin (A) from the viewpoint of molding processability and mechanical properties of the liquid crystalline resin composition. Preferably it is 0.5 parts by weight or less, more preferably 0.2 parts by weight or less. The lower limit is preferably 0.003 parts by weight or more. (B) If the higher fatty acid metal salt is larger than 1.0 part by weight, the molding processability is lowered, which is not preferable.

  The liquid crystalline resin composition used in the present invention can contain an inorganic filler as long as the object of the present invention is not impaired. The inorganic filler referred to here is a fibrous filler (for example, glass fiber, milled glass fiber, carbon fiber, alumina fiber, silicon carbide fiber, ceramic fiber, asbestos fiber, gypsum fiber, whisker (for example, aluminum borate whisker). , Potassium titanate whiskers, gypsum whiskers, etc.), inorganic fibers such as metal fibers (eg stainless steel, magnesium fibers, copper fibers etc.), scale-like fillers (eg mica, talc, kaolin, glass flakes, wollastonite, graphite) Etc.), granular fillers (for example, spherical silica, calcium carbonate, glass beads calcium phosphate, hollow glass beads), and the like.

  In the artificial feather of the present invention, it is possible to improve flexibility by adding (C) an olefin polymer to the liquid crystalline resin composition. Examples of the olefin polymer include ethylene, propylene, butene-1, pentene-1, hexene, 2-methylpentene-1, and the like, and these can be used alone or in combination.

  In order to improve the compatibility, the olefin polymer is preferably partially or entirely modified with a reactive functional group. Examples of the structure in which the reactive functional group is introduced include a random copolymer, a block copolymer, and a graft copolymer. Examples of the monomer structure that gives a reactive functional group include unsaturated carboxylic acid, unsaturated carboxylic acid anhydride, unsaturated carboxylic acid metal salt, and unsaturated carboxylic acid glycidyl ester. For example, acrylic acid, methacrylic acid, and maleic acid are preferable as the unsaturated carboxylic acid, and maleic anhydride is preferably used as the unsaturated carboxylic acid anhydride. As the unsaturated carboxylic acid metal salt, sodium acrylate, sodium methacrylate, zinc acrylate and zinc methacrylate are preferable, and as the unsaturated carboxylic acid glycidyl ester, glycidyl acrylate and glycidyl methacrylate are preferably used. Among these, an ethylene / glycidyl methacrylate copolymer is preferably used as the olefin copolymer modified with an unsaturated carboxylic acid glycidyl ester.

  These olefin copolymers can be used alone or in combination of two or more. The amount of the olefin copolymer used is preferably 0.5 to 20 parts by weight, more preferably 0.5 to 15 parts by weight, based on 100 parts by weight of the (A) liquid crystalline resin. Even more preferably, 0.5 to 10 parts by weight are used. (C) The amount of the olefin polymer used is 0.5 to 20 parts by weight with respect to 100 parts by weight of the (A) liquid crystalline resin, the fluidity is good, and the artificial feather can be easily molded, preferable.

  Furthermore, the liquid crystalline resin composition used in the present invention includes antioxidants and heat stabilizers (for example, hindered phenols, hydroquinones, phosphites, and substituted products thereof) within a range not impairing the object of the present invention. ), Ultraviolet absorbers (for example, resorcinol, salicylate, benzotriazole, benzophenone, etc.), mold release agents (for example, montanic acid and its salts, its esters, its half esters, stearyl alcohol, stearamide and polyethylene wax), dyes (for example, nigrosine) ) And pigments (eg, cadmium sulfide, phthalocyanine, carbon black, etc.), conventional additives such as colorants, plasticizers, flame retardants, flame retardant aids, antistatic agents, and other thermoplastic resins (fluorine resins, etc.) To give the specified characteristics. Can.

  The liquid crystalline resin composition used in the present invention can be produced by performing melt-kneading once to reduce the gas and improve the moldability in order to use pellets obtained by polymerization as they are. . A publicly known method can be used for melt kneading, for example, a Banbury mixer, a rubber roll machine, a kneader, a single screw or a twin screw extruder can be used. Of these, the liquid crystalline resin composition used in the present invention is preferably a twin screw extruder. In the melt-kneading method, (A) liquid crystalline resin is supplied from a raw material supply port to a twin screw extruder and melted, and when an inorganic filler is used, it is preferably supplied from an intermediate addition port of the twin screw extruder. . Further, when (B) a higher fatty acid metal salt is used, (A) it may be melt-kneaded in a twin-screw extruder together with a liquid crystalline resin and other additives, but after the pellets obtained by polymerization or after melt-kneading extrusion It is more preferable to blend into the pellets (for example, a tumbler mixer, a ribbon blender, etc.) in order to dramatically improve the molding processability.

  The artificial feather of the present invention is an artificial feather composed of a rod-shaped shaft and a fan-shaped thin portion, and preferably can be integrally formed.

  FIG. 1 is a schematic view showing an example of an embodiment of an artificial feather according to the present invention. As shown in FIG. 1, the artificial feather 1 is configured by disposing a fan-shaped thin portion 3 at one end portion of a rod-shaped shaft 2.

  In the artificial feather of the present invention, it is preferable that a gate position is present at the tip portion of the rod in order to express the specific orientation of the liquid crystalline resin. If the gate position exists at a position away from the tip portion, the orientation of the liquid crystalline resin is lowered and the elastic modulus is lowered, which is not preferable. Further, it is preferable that the gate position exists on the side not having the fan-shaped thin portion because it is easy to fill the molded product.

  The artificial feather of the present invention is preferably injection-molded with a gate position at the tip of the rod-shaped shaft.

  In the artificial feather of the present invention, the maximum thickness of the rod-shaped shaft portion is preferably 5 to 0.5 mm, and more preferably 3 to 0.5 mm. Here, the maximum thickness of 5 mm means that the artificial feather has a portion with a thickness less than that (for example, 2 mm), and the maximum thickness of 0.5 mm means that the artificial feather has a thickness less than that. This means that there is a portion (for example, 0.2 mm).

  If the maximum thickness is larger than 5 mm, the orientation of the liquid crystalline resin is difficult to be exhibited, which is not preferable because the elastic modulus is lowered. If the maximum thickness is smaller than 0.5 mm, the pressure at the time of injection molding is increased and molding is performed. This is not preferable because the properties are lowered.

  As for the artificial feather which consists of a liquid crystalline resin composition of this invention, 1-0.05 mm is preferable and, as for the maximum thickness of a fan-shaped thin part, 0.5-0.1 mm is more preferable. The maximum thickness of 1 mm means that the artificial feather has a portion with a thickness smaller than that (for example, 0.5 mm), and the maximum thickness of 0.05 mm means that the artificial feather has a thickness less than that (for example, 0.04 mm) part is present. If the maximum thickness is greater than 1 mm, the weight is undesirably too high, and if it is less than 0.05 mm, the pressure at the time of injection molding becomes too high, and the formability deteriorates. In addition, although the connection part of a fan-shaped thin part and a rod-shaped axis | shaft may enlarge thickness in order to ensure intensity | strength and fluidity, this part is not included in the maximum thickness of the said fan-shaped thin part.

  The fan-shaped thin portion of the artificial feather of the present invention has a film shape, a mesh shape, a key shape, a strip shape, or the like, and the outer edge 4 may be continuous or discontinuous.

  Hereinafter, the present invention will be described in more detail by way of examples.

[Reference Example 1]
870 parts by weight of p-hydroxybenzoic acid, 327 parts by weight of 4,4′-dihydroxybiphenyl, 89 parts by weight of hydroquinone, 292 parts by weight of terephthalic acid, 157 parts by weight of isophthalic acid and 1367 parts by weight of acetic anhydride (1. 03 equivalents) was charged into a reaction vessel equipped with a stirring blade and a distillation tube, and reacted for 2 hours while raising the temperature from room temperature to 145 ° C. with stirring in a nitrogen gas atmosphere, from 145 ° C. to 320 ° C. in 4 hours. The temperature rose. Thereafter, the polymerization temperature was reduced to 133 Pa at 320 ° C. for 1.0 hour, and the mixture was further stirred for about 1.5 hours to carry out polycondensation. The p-oxybenzoate unit is 70 molar equivalents relative to the sum of the p-oxybenzoate unit, the 4,4′-dioxybiphenyl unit and the 1,4-dioxybenzene unit, and the 4,4′-dioxybiphenyl unit is 4 Melting point 314 ° C., melting point 70 mol equivalent to the total of 4,4′-dioxybiphenyl unit and 1,4-dioxybenzene unit, terephthalate unit consisting of 65 mol equivalent to the sum of terephthalate unit and isophthalate unit A liquid crystalline polyester (A1) having a viscosity of 25 Pa · s (324 ° C., orifice 0.5 mm diameter × 10 mm, shear rate 1,000 / sec) was obtained.

[Reference Example 2]
994 parts by weight of p-hydroxybenzoic acid, 168 parts by weight of 4,4′-dihydroxybiphenyl, 150 parts by weight of terephthalic acid, 173 parts by weight of polyethylene terephthalate having an intrinsic viscosity of about 0.6 dl / g, and 1011 parts by weight of acetic anhydride were stirred. Charged to a reaction vessel equipped with a blade and a distilling tube, stirred for 3 hours while raising the temperature from room temperature to 150 ° C. with stirring in a nitrogen gas atmosphere, heated from 150 ° C. to 250 ° C. in 2 hours, After raising the temperature to 335 ° C. over 1.5 hours, the pressure was reduced to 6.5 × 10 −3 Pa at 335 ° C. over 1.5 hours, and stirring was continued for about 0.25 hours to perform polycondensation. Melting point 328 ° C., melt viscosity 18 Pa · s (338 ° C., orifice 0) consisting of 80 molar equivalents of aromatic oxycarbonyl units, 10 molar equivalents of aromatic dioxy units, 10 molar equivalents of ethylene dioxy units, and 20 molar equivalents of aromatic dicarboxylic acid units A liquid crystalline polyester (A2) having a diameter of 0.5 mm × 10 mm and a shear rate of 1,000 / second was obtained.

[Reference Example 3]
According to Japanese Patent Laid-Open No. 54-77691, 921 parts by weight of p-acetoxybenzoic acid and 435 parts by weight of 6-acetoxy-naphthoic acid were charged into a reaction vessel equipped with a stirring blade and a distillation tube, and polycondensation was performed. Melting point 283 ° C. melt viscosity 30 Pa · s (293 ° C., orifice 0.5 mm diameter × 10 mm, consisting of 57 molar equivalents of structural units produced from p-acetoxybenzoic acid and 22 molar equivalents of structural units produced from 6-acetoxy-naphthoic acid, A liquid crystalline polyester (A3) having a shear rate of 1,000 / second was obtained.

[Example 1]
Using the liquid crystalline polyester (A1) obtained in Reference Example 1, the artificial feather shown in FIG. 1 (the maximum thickness of the rod-shaped shaft is 2 mm, the length is 80 mm, the maximum thickness of the fan-shaped thin portion is 0.2 mm, the length 40 mm, piece width 10 mm) was injection-molded from the gate position 5 to obtain an artificial feather that could be filled up to a fan-shaped thin part. When the bending elastic modulus of the rod-shaped shaft portion of this artificial feather was measured at a distance between fulcrums of 20 mm and a measurement speed of 1 mm / min by a method according to ASTM-D790, it was 2.5 GPa and the bending deflection was 4%. .

[Example 2]
0.05 parts by weight of lithium stearate (manufactured by Katsuta Chemical Co., Ltd .: melting point 216 ° C.) as a higher fatty acid metal salt (10 parts) by a tumbler mixer with respect to 100 parts by weight of the liquid crystalline polyester (A1) obtained in Reference Example 1. When the same procedure as in Example 1 was performed except that a blended material for a minute was used, an artificial feather filled up to the fan-shaped thin portion could be obtained. Similarly, the bending elastic modulus was 2.5 GPa and the bending deflection was 4 %Met.

[Example 3]
What was obtained by melt-kneading the liquid crystalline polyester (A2) obtained in Reference Example 2 with a twin-screw extruder (cylinder setting temperature: melting point + 10 ° C., screw rotation speed: 250 rpm, cylinder diameter: 44 mm, Nippon Steel Works TEX-44) The same procedure as in Example 1 was performed except that the artificial feathers filled up to the fan-shaped thin part were obtained. Similarly, the bending elastic modulus was 3.0 GPa and the bending deflection amount was 4.5%. there were.

[Example 4]
Except that the liquid crystal polyester (A3) obtained in Reference Example 3 was used, the same procedure as in Example 1 was carried out. As a result, an artificial feather filled up to the fan-shaped thin portion could be obtained, and the flexural modulus was 2.5 GPa. Yes, the amount of bending deflection was 4%.

[Example 5]
In the same manner as in Example 3, biaxially, as in Example 3, 5.0 parts by weight of (C) an olefin polymer (Sumitomo Chemical Co., Ltd .: Bond First E) was added to 100 parts by weight of the liquid crystalline polyester (A1) obtained in Reference Example 1. The same procedure as in Example 1 was performed except that the melt-kneaded one was used in an extruder. As a result, an artificial feather filled up to a fan-shaped thin portion could be obtained. Similarly, the bending elastic modulus was 2.0 GPa, and the bending deflection amount Was 6.8%.

[Comparative Example 1]
Except for using a polyamide resin (nylon 6 resin Amilan CM1017 manufactured by Toray Industries, Inc.), it was carried out in the same manner as in Example 1. As a result, the fan-shaped thin portion could not be filled, and an artificial feather could not be obtained. Similarly, the flexural modulus was 0.8 GPa.

[Comparative Example 2]
Except for using a polyester resin (PBT resin Toraycon 1101G30 manufactured by Toray Industries, Inc.) using glass fiber as a filler, it was carried out in the same manner as in Example 1, but it was not possible to fill the fan-shaped thin part and obtain an artificial feather. It was. Similarly, the bending elastic modulus was 2.0 GPa and the bending deflection was 1.5%.

  From the above results, it can be seen that the artificial feather of the present invention has a light and high elastic modulus and a flexible elastic modulus as compared with the artificial feather using the resin composition of the comparative example.

  The artificial feather of the present invention is lightweight and has a high elastic modulus, and can be an artificial feather having thin feathers, which can be preferably used as a substitute for natural feathers. In addition, the artificial feather of the present invention is usefully used for products that use the feather as a part of a part, such as a badminton shuttle.

DESCRIPTION OF SYMBOLS 1 Artificial feather 2 Rod-shaped shaft 3 Fan-shaped thin part 4 Fan-shaped thin part outer edge 5 Gate

Claims (4)

An artificial feather composed of a liquid crystalline resin composition and composed of a rod-shaped shaft and a fan-shaped thin portion , wherein the liquid crystalline resin composition is:
A liquid crystalline polyester comprising the following structural units (I), (II) and (IV):
A liquid crystalline polyester comprising structural units of (I), (II), (III) and (IV), a liquid crystalline polyester comprising structural units of (I), (III) and (IV),
a liquid crystalline polyester comprising 57 molar equivalents of structural units produced from p-acetoxybenzoic acid and 22 molar equivalents of structural units produced from 6-acetoxy-naphthoic acid,
An artificial feather, which is a liquid crystalline resin composition containing at least one liquid crystalline resin selected from the group consisting of liquid crystalline polyesteramides.

(However, R1 in the formula is

One or more groups selected from R2

One or more groups selected from X in the formula represents a hydrogen atom or a chlorine atom, and the total of the structural units (II) and (III) and the structural unit (IV) are substantially equimolar. ) The liquid crystalline resin composition is
A liquid crystalline polyester comprising the structural units of (I), (II) and (IV) above;
A liquid crystalline polyester comprising structural units of (I), (II), (III) and (IV), and a liquid crystalline polyester comprising structural units of (I), (III) and (IV),
The artificial feather according to claim 1, which is a liquid crystalline resin composition containing at least one liquid crystalline resin selected from the group consisting of: The artificial feather according to claim 1 or 2, wherein a gate position is present at a tip portion of the rod-shaped shaft. The artificial feather according to any one of claims 1 to 3, wherein the rod-shaped portion has a maximum thickness of 5 to 0.5 mm, and the fan-shaped portion has a maximum thickness of 1 to 0.05 mm.

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