JP2002212310A - Polymer composite material molded product and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-performance polymer composite material molded product having anisotropic function and a method for practically producing the molded product. SOLUTION: Magnetic field is applied to a polymer composition obtained by compounding polyester fiber into a polymer material. Thereby, the polyester fiber is magnetized and orientated in a definite direction and then, the polymer composition is cured or solidified and molded in a prescribed shape. Anisotropic diamagnetic susceptibility χa of the polyester fiber is preferably >=1×10-8. Further, fiber length of the polyester is preferably <=10 mm. An aromatic polyester fiber, particularly whole aromatic polyester fiber is preferably used as the polyester fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polymer composite material molded article in which functional fibers are compounded into a polymer material, and a method for producing the same. More specifically, the present invention relates to a polymer composite material molded article in which polyester fibers are oriented in a certain direction in a polymer material as a functional synthetic resin fiber, and to a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, there has been widely known a polymer composite material molded article in which functional fibers such as glass fiber, carbon fiber, metal fiber, and aramid fiber are blended with a polymer material as a matrix to form a composite. I have. For example, fiber-reinforced resins and fiber-reinforced rubbers with improved functionality such as elastic modulus and strength are known and widely used as molded parts for space, aircraft, automobiles, electric products, sports, leisure goods, and the like. .

[0003] Polyester fiber is known as a functional synthetic resin fiber having various excellent functions such as high elastic modulus, high strength, heat resistance and low specific gravity, and the polyester fiber is randomly dispersed in a polymer composition. A polymer composite material molded article that has been compounded and compounded has been realized.

On the other hand, in recent complicated mechanical parts, mechanical properties such as elastic modulus and strength, thermal properties such as thermal expansion coefficient and thermal conductivity, optical properties, anisotropic properties such as electrical properties, etc. The realization of a new polymer composite material having a function has been eagerly desired.

[0005] As a method for producing a polymer composite material having such an anisotropic function, there is known a method of forming a composite in a polymer composition by utilizing a flow field or a shear field of a polymer material of a matrix during molding. Production of a polymer composite material molded article in which carbon fibers or graphitized carbon fibers or glass fibers, and aramid fibers are oriented in a certain direction to exhibit an anisotropic function. Is implemented as a method.

There is also known a method for producing a polymer composite material molded article in which a carbon fiber in a polymer composition is oriented in a certain direction by applying a magnetic field to exhibit an anisotropic function. .

[0007]

However, in the polymer composite material molded article using the conventional polyester fiber as the functional synthetic resin fiber, the polyester fiber is randomly oriented without being oriented in a certain direction in the polymer composition. , The functionality was isotropically expressed, and it was not a polymer composite material molded article having an anisotropic function. That is, in a polymer composite material molded article using a polyester fiber as a functional synthetic resin fiber, a high-performance polymer composite material molded article having an anisotropic function has not been realized yet.

For this reason, it is expected that a high-performance molded article of a polymer composite material having an anisotropic function can be realized by orienting the polyester fibers blended in the polymer material in any given direction. Was.

However, in the above-mentioned conventional method for producing a polymer composite material molded article in which a composite fiber is oriented in a certain direction by using a flow field, a shear field or an electric field of the polymer material, the molding conditions and There were many restrictions on facilities, and there was a problem that the degree of freedom in design was narrow. In addition, in a weld portion of a matrix where the flowing polymer composition collides, for example, the fibers to be composited are not always oriented in a certain direction, so that it is difficult to sufficiently exert an anisotropic function. there were. Therefore, the above-mentioned conventional method for producing a polymer composite material using a flow field, a shear field, or an electric field of a polymer material is a method for producing a high-performance polymer composite material having an anisotropic function. It was not a practical manufacturing method.

A method for producing a polymer composite material molded article in which carbon fibers as inorganic fibers are magnetically oriented in a certain direction has been known as described above, but a synthetic resin fiber is magnetically oriented in a certain direction. A method for producing a molded polymer composite material has not yet been reported. For example, as a report that synthetic resin fibers were magnetically oriented, by applying a magnetic field while ultra-high molecular weight polyethylene fibers were dispersed in a solution of water and ethanol, the polyethylene fibers were oriented perpendicular to the magnetic field direction. Reports (eg Po
lymer Preprint, Japan, Vol.
47, no. 14, 4075 (1998)),
Also in this report, the polyethylene fiber as the synthetic resin fiber could not be oriented in any one direction.
That is, the polyethylene fiber was oriented in a direction perpendicular to the direction of the magnetic field lines, that is, in an indeterminate direction in a plane perpendicular to the magnetic field lines, and was not oriented in any one direction. Further, since the melting point of polyethylene fibers is about 130 ° C., there is a disadvantage that the heat resistance of the obtained polymer composite material molded article is low. Further, there is no disclosure of a method for orienting a polyester fiber as a synthetic resin fiber in a certain direction.

Therefore, a high-performance molded article of a polymer composite material having an anisotropic function can be realized by orienting a polyester fiber as a synthetic resin fiber in an arbitrary fixed direction in a polymer composition. Although expected, such a high-performance polymer composite material molded article and a practical production method thereof were not disclosed at all, and thus could not be realized.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to orient polyester fibers as functional synthetic resin fibers to be compounded and compounded in a polymer material in any given direction. Accordingly, it is an object of the present invention to provide a high-performance polymer composite material molded article having an anisotropic function and a practical production method thereof.

[0013]

Means for Solving the Problems In order to solve the above problems, the present inventors have developed a polymer composite material molded article in which polyester fibers are oriented in a given direction in the polymer material.
Excellent anisotropic functions such as mechanical properties, thermal properties, optical properties, and electrical properties, and a practical method for producing a high-performance polymer composite material molded article having the anisotropic functions. Reached the present invention.

That is, the invention according to claim 1 is a polymer composite material molded article in which polyester fibers are blended in a polymer material, wherein the polyester fibers are oriented in a certain direction in the polymer material. It is characterized by being.

According to a second aspect of the present invention, in the first aspect, aromatic polyester fibers are used. The invention according to claim 3 is the invention according to claim 2, wherein the aromatic polyester fiber has a structural unit derived from an aromatic dicarboxylic acid and a structural unit derived from an aromatic diol as main structural units. It is an aromatic polyester fiber.

According to a fourth aspect of the present invention, in the second aspect, the aromatic polyester fiber is a wholly aromatic polyester fiber having a structural unit derived from an aromatic hydroxycarboxylic acid as a main structural unit, or A wholly aromatic polyester fiber whose main constituent unit is a constituent unit derived from an aromatic dicarboxylic acid, a constituent unit derived from an aromatic diol, and a constituent unit derived from an aromatic hydroxycarboxylic acid.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the fiber length of the polyester fiber is 10 mm or less. The invention according to claim 6 is that, by applying a magnetic field to a polymer composition in which polyester fibers are blended in a polymer material, the polyester fibers are magnetized and oriented in a certain direction, and then the polymer composition is polymerized. It is characterized in that an object is cured or solidified and formed into a predetermined shape.

According to a seventh aspect of the present invention, in the sixth aspect, the anisotropic diamagnetic susceptibility Δa of the polyester fiber is used.
Is 1 × 10 ⁻⁸ or more. Claim 8
The invention described in (6) is characterized in that, in the invention described in (6) or (7), the polyester fiber is an aromatic polyester fiber.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, the aromatic polyester fiber has a main constituent unit consisting of a constituent unit derived from an aromatic dicarboxylic acid and a constituent unit derived from an aromatic diol. Characterized in that it is a wholly aromatic polyester fiber.

The invention according to claim 10 is the invention according to claim 8, wherein the aromatic polyester fiber is a wholly aromatic polyester fiber having a structural unit derived from an aromatic hydroxycarboxylic acid as a main structural unit, or A wholly aromatic polyester fiber whose main constituent unit is a constituent unit derived from an aromatic dicarboxylic acid, a constituent unit derived from an aromatic diol, and a constituent unit derived from an aromatic hydroxycarboxylic acid.

According to an eleventh aspect of the present invention, in any one of the sixth to tenth aspects, the polyester fiber has a fiber length of 10 mm or less.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION A polymer composite material molded article of the present invention is a polymer composite material molded article in which polyester fibers as functional synthetic resin fibers are blended in a polymer material. It is characterized by being oriented in a certain direction in the polymer material.

<Polyester Fiber> First, a polyester fiber used as a functional synthetic resin fiber will be described.

The polyester fiber is not particularly limited, and a known polyester fiber can be used. Specifically, in addition to aliphatic polyester fibers, aromatic polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and liquid crystalline polyester fibers are included.

Of these, it is preferable to use wholly aromatic polyester fibers called polyarylate fibers. Wholly aromatic polyester fibers are generally excellent in elastic modulus, strength, elongation, heat resistance, weather resistance, etc., and have a leap in functionality such as mechanical properties and thermal properties of the resulting polymer composite molded article. Can be improved.

Such a wholly aromatic polyester fiber is not particularly limited, but (i) a repeating structural unit derived from an aromatic dicarboxylic acid and a structural unit derived from an aromatic diol as a main structural unit. (Ii)
(Iii) a structural unit derived from an aromatic dicarboxylic acid, a structural unit derived from an aromatic diol, and a structural unit derived from an aromatic hydroxycarboxylic acid. And the like as a main structural unit. It is to be noted that the exemplified wholly aromatic polyester fibers are not particularly limited to the combination of the constituent units, for example, those whose main constituent unit is a constituent unit derived from a different or the same kind of aromatic hydroxycarboxylic acid. including.

The structural unit derived from an aromatic dicarboxylic acid is not particularly limited, but examples thereof include isophthalic acid, terephthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenyletherdicarboxylic acid, diphenoxyethanedicarboxylic acid, Examples include structural units derived from diphenylmethane dicarboxylic acid, diphenyl ketone dicarboxylic acid, diphenyl sulfide dicarboxylic acid, diphenyl sulfone dicarboxylic acid, and the like.

The structural unit derived from the aromatic diol is not particularly limited, and examples thereof include bisphenol A, 4,4'-dihydroxy-diphenyl ether, 4,4'-dihydroxy-diphenylthioether, and 2,2. '-(4,4'-dihydroxy-3,5,
Structural units derived from 3 ′, 5′-tetrabromodiphenyl) propane and the like are included.

The structural unit derived from an aromatic hydroxycarboxylic acid is not particularly limited, but examples thereof include structural units derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, and the like. .

Specific examples of the wholly aromatic polyester fiber include, but are not limited to, wholly aromatic polyester fibers having the following structural units in combination (1) to (11).

[0031]

Embedded image As such a wholly aromatic polyester fiber, for example, Vectran (trade name) manufactured by Kuraray Co., Ltd. having the above (5) as a main constituent unit is commercially available and can be easily obtained. These fibers are also excellent in non-water absorption, abrasion resistance, impact absorption, and the like in addition to the above properties. A molecular composite material molded article can be manufactured.

The aromatic ring in each of the above structural units is partially modified with a substituent such as a halogen group, an alkyl group, an alkoxy group, a hydroxyl group, a cyano group, an acetyl group, a nitro group or an amino group. Alternatively, it may be replaced.

Further, the wholly aromatic polyester fiber may be one in which a part thereof has been replaced with a structural unit derived from the above-mentioned other aromatic dicarboxylic acid, aromatic diol or aromatic hydroxycarboxylic acid. Absent. Or,
Part of the wholly aromatic polyester fiber is succinic acid,
Aliphatic dicarboxylic acids such as adipic acid and sebacic acid,
Alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid, tetralindicarboxylic acid, and decalindicarboxylic acid;
It may be replaced by a structural unit derived from an aliphatic or alicyclic diol, an aliphatic or alicyclic hydroxycarboxylic acid, or the like.

Further, the wholly aromatic polyester fiber is partially made of polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyester elastomer, polystyrene polymer for the purpose of improving functions such as heat resistance and moldability. It may be replaced with a known polymer such as a coalesced polymer, an acrylic polymer, or a polyamide polymer.

Regarding the cross-sectional shape of the polyester fiber,
It is not particularly limited, for example, whisker-like,
It may have a cross-sectional shape such as pulp. Further, a composite fiber having a core-sheath structure composed of a polyester fiber and another fiber is also applicable.

[0036] The diameter of the polyester fiber is not particularly limited.
Considering the blending with the polymer material and the like, the practically preferable diameter of the fiber is 0.1 to 30 μm.

The fiber length of the polyester fiber is not particularly limited, but is preferably 10 mm or less, more preferably 5 mm or less, and further preferably 2 mm or less.
mm or less. In order to express the anisotropic function of the polyester fiber and further improve the functionality of the obtained polymer composite material molded article, it is generally necessary that the fiber aspect ratio (fiber length: diameter) is larger. Although it is preferable, if the fiber length of the polyester fiber is longer than 10 mm, it is difficult to uniformly disperse the polymer fiber in the polymer material, and the viscosity is increased to deteriorate the moldability, which is not preferable. Further, as the fiber length is longer, the fibers are entangled with each other, and it is difficult to orient the polyester fibers in a certain direction. The lower limit of the fiber length of the polyester fiber is not particularly limited, and
Although it depends on the fiber diameter, it is preferably at least 10 μm, more preferably at least 50 μm. When the fiber length of the polyester fiber is less than 10 μm, even when the fiber diameter is 0.1 μm, the aspect ratio becomes less than 100, and the anisotropic function of the obtained polymer composite material is less likely to be exhibited. Therefore, it is not preferable.

Anisotropic diamagnetic susceptibility of polyester fiberχ
a (CGS unit system) is preferably 1 × 10 ⁻⁸ or more. When the anisotropic diamagnetic susceptibility χa is smaller than 1 × 10 ^−8, it is difficult to orient the polyester fiber in a certain direction. More preferred anisotropic diamagnetic susceptibility χ
a is 5 × 10 ⁻⁸ or more, more preferably 1 × 10 ⁻⁷ or more. Anisotropic diamagnetic susceptibility χa of polyester fiber
The larger the value is, the easier it is to make the polyester fiber highly magnetically oriented. The upper limit of the anisotropic diamagnetic susceptibility χa of the polyester fiber is estimated to be about 1 × 10 ⁻⁵ to 1 × 10 ⁻⁶ .

Here, the anisotropic diamagnetic susceptibility χa is defined as
Fiber axis of the fiber generated by applying a magnetic field from the part
Magnetic susceptibility χ_//From the magnetization perpendicular to the fiber axis
Rate _⊥Showing the anisotropy of the diamagnetic susceptibility (C
GS unit system). This anisotropic diamagnetic susceptibility χa is positive
Fibers, for example, polyester fibers, etc.
Under field atmosphere, the fiber axis is oriented parallel to the magnetic field lines,
Also, the absolute value of the anisotropic diamagnetic susceptibility χa increases.
The higher the level, the higher the
Orientation. On the other hand, anisotropic diamagnetic magnetization
Fibers having a negative value of the rate Δa, for example,
When using styrene fiber, the fiber axis is perpendicular to the magnetic field lines.
A magnetic field is applied to make the fibers straight, and the fibers move in the direction of the magnetic field lines.
The direction perpendicular to the magnetic field, that is, the plane perpendicular to the magnetic field lines is indeterminate
Orientated in any direction
Can not do. Note that the anisotropic diamagnetic susceptibility は a is
Gas anisotropic torque meter, vibrating magnetometer, SQUID (superconducting
Quantum interference device), suspension method and other known methods.
Can be measured.

<Polymer Material> Next, a polymer material as a matrix will be described. The polymer material is not particularly limited, and is required to meet the required properties such as mechanical properties, thermal properties, optical properties, electrical properties, durability, and reliability of the target polymer composite material. Accordingly, for example,
Thermoplastic resins, thermoplastic elastomers, various curable resins, crosslinked rubbers and the like can be suitably used.

Specific examples of the thermoplastic resin include polyethylene, polypropylene, ethylene-α-olefin copolymers such as ethylene-propylene copolymer, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, and ethylene acetate. -Vinyl acetate copolymer, polyvinyl alcohol, polyvinyl acetal, fluorine resin such as polyvinylidene fluoride and polytetrafluoroethylene,
Polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polystyrene, polyacrylonitrile, styrene-acrylonitrile copolymer, ABS resin, polyphenylene ether and modified PP
E resin, aliphatic and aromatic polyamides, polyimide,
Polyamide imide, polymethacrylic acid esters such as polymethacrylic acid and its methyl ester, polyacrylic acids, polycarbonate, polyphenylene sulfide, polysulfone, polyether sulfone, polyether nitrile, polyether ketone, polyketone, liquid crystal polymer, silicone resin, Ionomers and the like.

Specific thermoplastic elastomers include:
Styrene-butadiene or styrene-isoprene block copolymer and its hydrogenated polymer, styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, vinyl chloride-based thermoplastic elastomer, polyester-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer, polyamide-based Thermoplastic elastomers and the like can be mentioned.

Specific curable resins include epoxy resin, polyimide resin, acrylic resin, bismaleimide resin, benzocyclobutene resin, phenol resin, unsaturated polyester resin, diallyl phthalate resin, silicone resin, urethane resin, and polyimide silicone. Resins, thermosetting polyphenylene ether, modified PPE resin, and the like.

Specific examples of the crosslinked rubber and its analogs include natural rubber, butadiene rubber, isoprene rubber, styrene-butadiene copolymer rubber, nitrile rubber, hydrogenated nitrile rubber, chloroprene rubber, ethylene-propylene rubber, and chlorinated polyethylene. Chlorosulfonated polyethylene, butyl rubber and halogenated butyl rubber, fluorine rubber, urethane rubber, silicone rubber, liquid rubber and the like.

Among these polymer materials, at least one polymer selected from the group consisting of epoxy resins, unsaturated polyester resins, phenol resins, acrylic resins, urethane resins, polyimide resins, silicone resins and liquid rubbers It is preferable to use a material from the viewpoint of temperature characteristics such as heat resistance and electrical reliability. In addition, when these polymer materials are used, the liquid is a low-viscosity liquid when mixing the polyester fibers, or the viscosity can be reduced during heating and melting. Alignment control becomes easy. More specifically, it is preferable to use a polymer precursor such as a liquid epoxy resin, an unsaturated polyester resin, or a liquid rubber, or a polymer material having a low viscosity in a molten state.

These polymer materials may be used alone or in an appropriate combination of two or more. Further, the polymer material may be composed of a plurality of polymer materials selected from these polymer materials. A polymer alloy may be used. The method of crosslinking the curable resin or the crosslinked rubber is not particularly limited, and a known crosslinking method such as a thermosetting method, a photocuring method, a moisture curing method, a radiation or electron beam irradiation method can be employed.

<Polymer Composite Material Molded Product> The polymer composite material molded product is characterized in that the polyester fiber as the above-mentioned functional synthetic resin fiber is oriented in a certain direction in the polymer material. In this way, the polyester fiber is oriented in a certain direction in the polymer material, so that various functionalities such as elastic modulus and strength in the fiber length direction as a functional synthetic resin fiber are exhibited, and anisotropic A high-performance polymer composite material molded body having a function can be realized.

Specifically, the strength of the polymer composite material is improved by utilizing the high tensile breaking strength of the polyester fiber, or the polymer is enhanced by utilizing the high elastic modulus of the polyester fiber in the fiber axis direction. Improving the elasticity of the composite material in a specific direction, or reducing the coefficient of thermal expansion or dimensional change in the specific direction of the polymer composite by using the low thermal expansion of polyester fiber in the fiber axis direction. And so on.

Regarding the shape of the polymer composite material molded body,
The shape is not particularly limited, and a known shape can be adopted, and examples include a cubic shape, a spherical shape, a columnar shape, a plate shape, a film shape, a rod shape, and a tube shape. In addition, the polymer composite material molded body may be one in which polyester fibers in only a part of the molded body are oriented in a certain direction.

The molded article of the polymer composite material has anisotropic functions such as mechanical properties such as elastic modulus and strength, thermal properties such as thermal expansion coefficient and thermal conductivity, electrical properties and optical properties. It can be applied to molded products for all required applications, for example, it can be applied to mechanical parts, mechanical parts, automobile parts, electric products, etc. It can be applied to irregular shaped articles.

<Production Method> The method for producing a polymer composite material molded article of the present invention comprises the steps of: preparing a polymer composition in which a polyester fiber as a functional synthetic resin fiber is blended in a polymer material;
The method is characterized in that, by applying a magnetic field, the polyester fiber is magnetized and oriented in a certain direction, and then the polymer composition is cured or solidified and formed into a predetermined shape.

(Preparation of Polymer Composition)
It can be obtained by blending the above-mentioned polyester fiber into the above-mentioned polymer material using a known mixing / kneading apparatus such as a blender, a mixer, a roll, an extruder, or the like. When mixing and dispersing, it is preferable to add a step of removing mixed air bubbles by reducing or increasing the pressure.

The amount of the polyester fiber blended in the polymer material is not particularly limited, and is appropriately determined depending on the required performance of the intended final product.
It is preferably 0.01 to 50 parts by weight with respect to 0 parts by weight. As the blending amount of the polyester fiber is larger, the anisotropic function of the obtained polymer composite material is improved, but when the blending amount of the polyester fiber exceeds 50 parts by weight, the viscosity of the polymer composition is increased. Liquidity is impaired
It is not preferable because it becomes difficult to control the orientation of the polyester fiber. On the other hand, if the blending amount of the polyester fiber is less than 0.01 part by weight, the effect of improving the functionality of the obtained polymer composite material molded article is undesirably reduced. A more preferred amount of the polyester fiber is 100
It is 0.02 to 30 parts by weight, more preferably 0.05 to 20 parts by weight based on parts by weight.

In addition, the polymer composition may contain a small amount of aramid fiber, aliphatic polyamide fiber, polybenzazole fiber, polyimide fiber, polyphenylene sulfide fiber, phenol fiber,
Organic fibers such as polyolefin fibers and vinylon fibers, natural fibers, carbon fibers, metal fibers, ceramic fibers, composite fibers obtained by combining these fibers, carbon fibers and organic fibers coated on the surface with a metal such as nickel, or those It may be a mixture of a small amount of woven fabric or nonwoven fabric. By mixing these small amounts of fibers or woven or nonwoven fabrics, it is possible to improve various functions of the obtained polymer composite material molded article. Furthermore, the polymer composition may contain other fillers and plasticizers as necessary, a crosslinking agent,
A small amount of additives such as a coloring agent, a stabilizer and a solvent may be used in combination.

In order to improve the wettability and adhesion with the polymer material, the surface of the polyester fiber is previously degreased or washed, irradiated with ultraviolet rays, corona discharge, plasma, flame, or ion implantation. It is preferable to perform an activation process such as this. In addition to these surface treatments, it is preferable to treat the surface of the polyester fiber with a normal coupling agent such as silane, titanium, or aluminum, or resorcinol formalin latex. As a result, a larger amount of polyester fibers can be easily dispersed and mixed in the polymer material.

Further, the viscosity of the polymer composition is reduced by adding a volatile organic solvent or a reactive plasticizer to increase the blending amount of the polyester fiber or the specific gravity of the polyester fiber and the polymer material. By reducing the difference, sedimentation of the polyester fiber in the polymer composition can be prevented to promote orientation.

(Molding of polymer composite material molded article) The polymer composite material molded article is cured or solidified by a known method such as various curing reactions or cooling treatments. It is obtained by molding into the shape of

The molding method for the polymer composite material molded body is not particularly limited, and may be extrusion molding, injection molding, compression molding, transfer molding, blow molding, vacuum molding, rotation molding. Is applicable.

(Orientation) The polyester fibers in the polymer composition are magnetized by applying a magnetic field from the outside, and are oriented such that their fiber axes are parallel to the lines of magnetic force. This makes it possible to orient the polyester fiber in any given direction, and to take advantage of anisotropic properties such as high elasticity and low thermal expansion property of the polyester fiber in the fiber axis direction, to provide mechanical properties such as elastic modulus and strength, Thermal properties, optical properties,
A high-performance polymer composite material molded article having an anisotropic function such as electric properties can be easily produced.

More specifically, for example, when a polyester fiber is oriented in the thickness direction when forming a plate-shaped molded article of a polymer composite material, the N pole of the permanent magnet or the electromagnet and the S pole are oriented in the thickness direction. The polyester fibers can be oriented in the thickness direction by disposing the poles so as to face each other and applying a magnetic field so that the magnetic field lines are oriented in the thickness direction.
Then, by curing or solidifying the polymer composition in a state where the polyester fibers are oriented in the thickness direction, a polymer composite material molded article in which the polyester fibers are oriented in the thickness direction can be obtained.

On the other hand, for example, when the polyester fiber is oriented in one direction in the plane when forming a plate-shaped molded article of a polymer composite material, the N pole of the magnet is perpendicular to the thickness direction. By applying a magnetic field so that the direction of the lines of magnetic force is directed in one direction in the plane, the polyester fibers can be oriented in one direction in the plane. Then, by curing or solidifying the polymer composition in a state where the polyester fibers are oriented in one direction in the plane, it is possible to obtain a polymer composite material molded article in which the polyester fibers are oriented in one direction in the plane. it can. It should be noted that the polyester fibers can be oriented in one direction in the plane even when the N pole and the N pole or the S pole and the S pole of the magnet are opposed in the thickness direction.

Here, unlike the ultrahigh molecular weight polyethylene fiber described above, the polyester fiber is oriented so that its fiber axis is parallel to the line of magnetic force because (a) the polyethylene fiber has anisotropic diamagnetic magnetization. Since the rate 作用 a shows a negative value, a magnetic field is applied so that the fiber axis is perpendicular to the line of magnetic force. However, the polyester fiber shows a positive value for the anisotropic diamagnetic susceptibility χa, On the other hand, a magnetic field is applied so that the fiber axes are parallel to each other, and (b) an eddy current is generated when the aromatic ring is arranged perpendicular to the magnetic field lines.
So that the aromatic ring is parallel to the magnetic field lines,
In the case of fibers such as polyester fibers obtained by stretching a polymer compound containing an aromatic ring in the main chain, a magnetic field is applied so that the fiber axis is parallel to the magnetic field lines,
(C) Considering the anisotropic magnetic susceptibility of the aromatic ring, the orientation direction in which as many aromatic rings in the oriented polyester fiber as possible are parallel to the line of magnetic force is the most stable in terms of energy. It is presumed to be due to

Therefore, when an aromatic polyester fiber or a wholly aromatic polyester fiber is used as the polyester fiber to be blended, it can be highly oriented in the polymer composition so that the fiber axis is parallel to the magnetic field lines, A polymer composite material molded article having an anisotropic function can be produced more easily.

The magnetic field generating means is not particularly limited.
For example, permanent magnets, electromagnets, coils and the like are preferably used. The magnetic flux density indicating the strength of the magnetic field is not particularly limited, but if it is 0.1 to 30 Tesla, practical and effective orientation of the polyester fiber can be achieved. Further, in order to orient the polyester fiber in a certain direction by using the very weak anisotropic diamagnetic susceptibility χa of the polyester fiber, it is preferable that the magnetic flux density is stronger, more preferably 0.5 tesla or more. And more preferably 2 tesla or more.

The lines of magnetic force need not necessarily be linear, but may be curved or rectangular, or may be two or more directions. Further, a configuration in which only a part of the polymer composition is arranged in a magnetic field atmosphere may be employed.
Further, it is not always necessary to oppose the magnets on both sides, and it is possible to orient the polyester fibers in the polymer composition in any given direction by using magnets arranged only on one side. Further, the orientation of the polyester fibers in the polymer composition can be promoted by applying vibration to the polymer composition or reversing the direction of the lines of magnetic force.

<Application Example> FIGS. 1A to 1D and FIG.
(A) to (d) show application examples of the method for producing a polymer composite material molded article of the present invention.

The polymer concave portion 11a of the mold 11 is filled with the polymer composition 13a, and the polyester fiber 14 is moved along the lines of magnetic force in a magnetic field atmosphere in which the N and S poles of the magnet 12 as the magnetic field generating means face each other. After being oriented in parallel, the polymer composition 13a is cured or solidified and molded into a predetermined shape,
The polymer composite material molded body 13 is manufactured. Thereby, the polymer composite material molded body 13 in which the polyester fibers are oriented so that the fiber axis is parallel to the magnetic field lines can be easily obtained. FIGS. 1A to 1D show an example of a method for producing a polymer composite material molded body 13 in which polyester fibers 14 are oriented in a certain direction in a plane, and FIGS. 2A to 2D.
Shows an example of a method for producing a polymer composite material molded article 13 in which the polyester fibers 14 are oriented in the thickness direction.

The effects exerted by the above embodiments will be summarized below.・ In the polymer composite material molded product in which the functional synthetic resin fiber is blended into the polymer material, the polyester fiber is used as the functional synthetic resin fiber, and the polyester fiber is oriented in a certain direction in the polymer material. I let it. Thereby, taking advantage of the properties of polyester fiber having various excellent functions such as high elastic modulus, high strength, heat resistance, and low specific gravity,
A high-performance molded article of a polymer composite material having an anisotropic function can be realized.

After applying a magnetic field to the polymer composition in which the polyester fiber is blended in the polymer material to orient the polyester fiber in a certain direction, the polymer composition is cured or solidified to a predetermined shape. Thus, a polymer composite material molded article was manufactured. This makes it possible to highly orient the polyester fibers in a certain direction and easily obtain a polymer composite material molded article having an anisotropic function, as compared with the conventional manufacturing method in which the polyester fibers are mechanically oriented. be able to. Further, when the anisotropic diamagnetic susceptibility χa of the polyester fiber is 1 × 10 ⁻⁸ or more, the polyester fiber can be highly oriented in a certain direction by applying a magnetic field, and the orientation of the polyester fiber can be improved. Control becomes easy, and a polymer composite material molded article having an anisotropic function can be obtained more easily.

An aromatic polyester fiber was used as the polyester fiber as the functional synthetic resin fiber. Thus, by utilizing the above-described magnetic field action on the aromatic ring, the fiber axis can be highly oriented so as to be parallel to the line of magnetic force, and furthermore, the elastic modulus, strength, heat resistance, weather resistance, etc. Thus, it is possible to obtain a molded article of a polymer composite material having excellent properties. In particular, when a wholly aromatic polyester fiber is used, it can be blended more and more highly in a magnetic field atmosphere, and a high-performance molded article of a polymer composite material can be realized.

The length of the polyester fiber is 10 m
m or less. As a result, the polyester fibers can be uniformly dispersed in the polymer material, the molding processability can be improved, and the orientation of the polyester fibers in the polymer composition can be easily controlled.

[0072]

EXAMPLES Hereinafter, the above embodiments will be described more specifically with reference to examples and comparative examples, but these do not limit the scope of the present invention in any way.

(Measurement of anisotropic diamagnetic susceptibility χa) Anisotropic diamagnetic susceptibility χa (CG of Vectran HT (diameter: 10 μm), a wholly aromatic polyester fiber manufactured by Kuraray Co., Ltd.
(S unit system) was measured with a magnetic anisotropic torque meter (Tamakawa Seisakusho's magnetic anisotropic torque meter).
It was 10 ^-7 .

Example 1 As a polymer material, an unsaturated polyester resin (Epolac G15 manufactured by Nippon Shokubai Co., Ltd.)
7) 100 parts by weight of polyester fiber whose surface is degreased with ethanol (Kuraray's wholly aromatic polyester fiber Vectran HT: 10 μm in diameter, 1 mm in length)
2 parts by weight were mixed and vacuum degassed to prepare a polymer composition 13a.

The obtained polymer composition 13a was mixed with the polymer composition 13a shown in FIG.
As shown in (a) to (d), an N-pole and an S-pole of a magnet 12 serving as a magnetic field generating means are filled in a molding concave portion 11a of a plate-shaped metal mold 11 made of aluminum coated with a fluororesin. In a magnetic field atmosphere having a magnetic flux density of 8 Tesla facing the polyester fiber, the polyester fibers were sufficiently oriented in the in-plane horizontal direction, and then heat-cured and solidified to produce a plate-shaped polymer composite material molded article 13. The polyester fibers 14 in the obtained polymer composite material molded body 13 were oriented in one direction in the plane as shown in FIG.

Similarly, the polymer composition 13a was added to FIG.
As shown in (a) to (d), an N-pole and an S-pole of a magnet 12 serving as a magnetic field generating means are filled in a molding concave portion 11a of a plate-shaped metal mold 11 made of aluminum coated with a fluororesin. In a magnetic field atmosphere with a magnetic flux density of 8 Tesla facing the polyester fiber, the polyester fiber was sufficiently oriented in the thickness direction, and then cured by heating and solidified to produce a plate-shaped polymer composite material molded body 13. Obtained polymer composite material molded body 1
The polyester fibers 14 in No. 3 were oriented in the thickness direction as shown in FIG.

Each of the obtained polymer composite material molded articles 13
Table 1 shows the results of measuring the flexural modulus (JIS K7055) and the coefficient of linear expansion (JIS K7197) of the sample.
The measurement of the bending elastic modulus and the coefficient of linear expansion was performed by using an evaluation test piece (bending elastic modulus: thickness 5 mm, length 15 mm, width 120 mm, line width) prepared by cutting the obtained polymer composite material 13. Expansion coefficient: thickness 5 mm, length 5 mm, width 5
mm). Here, the measurement of the flexural modulus and the coefficient of linear expansion is obtained by measuring a test piece for evaluation in the thickness direction of the polymer composite material molded body 13 serving as each base material. Therefore, in the test piece for evaluation of the orientation direction shown in FIG. 1 (d), the polymer in the direction perpendicular to the fiber axis (hereinafter referred to as the axis perpendicular direction), which is the direction in which the polyester fiber 14 oriented in the in-plane direction is bent. In the test piece for evaluation of the orientation direction shown in FIG. 2D, the bending modulus of elasticity and the coefficient of linear expansion of the composite material molded body 13 are such that the polymer composite material is formed in the direction parallel to the fiber axis (hereinafter referred to as the axis parallel direction). The bending elastic modulus and the coefficient of linear expansion of the body 13 are obtained.

Example 2 and Example 3 A plate-shaped polymer composite material molded article 13 was prepared in the same manner as in Example 1 except that the compounding amounts of the polyester fibers were respectively set as shown in Table 1. Produced. Obtained polymer composite material molded body 13
In the same manner as in Example 1, the polyester fiber 14 in the polyester fiber 14 of the one polymer composite material molded body 13 was used.
Are oriented in one direction in the plane as shown in FIG. 1 (d), and the polyester fibers 14 of the other polymer composite material molded body 13
Was oriented in the thickness direction as shown in FIG.

Table 1 shows the measurement results of the flexural modulus and the coefficient of linear expansion measured in the same manner as in Example 1. Comparative Example 1 For comparison, an unsaturated polyester resin as a polymer material (Epolac G manufactured by Nippon Shokubai Co., Ltd.)
157) alone, as shown in FIGS. 1 (a) and 1 (b), is filled into a molding recess 11a of an aluminum plate-shaped mold 11 coated with a fluorine resin, and is cured by heating and solidified. Then, a plate-shaped molded article of a polymer material was produced.

Table 1 shows the measurement results of the flexural modulus and the coefficient of linear expansion measured in the same manner as in Example 1. In the present comparative example, since no polyester fiber was blended, the measurement results of the flexural modulus and the coefficient of linear expansion were higher than those measured in the directions corresponding to the measurement directions of the polymer composite material molded body 13 of Example 1. It is a measurement of the flexural modulus and the coefficient of linear expansion of a molecular material molded product.

(Comparative Example 2) For comparison, a plate-like material was prepared in the same manner as in Example 2, except that the polymer composition 13a of Example 2 was cured by heating without applying a magnetic field. Was produced. The polyester fibers 14 in the obtained polymer composite material molded article 13 were randomly dispersed as shown in FIG. 3, and no orientation was observed.

Table 1 shows the measurement results of the flexural modulus and the coefficient of linear expansion measured in the same manner as in Example 1. In this comparative example, since the polyester fibers 14 are not oriented in a certain direction, the measurement results of the flexural modulus and the coefficient of linear expansion correspond to the measurement directions of the polymer composite material molded body 13 of Example 1. This is a measurement of the bending elastic modulus and the coefficient of linear expansion in the direction in which the bending is performed.

[0083]

[Table 1] (Example 4) Liquid silicone rubber (TSE3070 manufactured by GE Silicone Co., Ltd.) 100 as a polymer material
After adding 50 parts by weight of hexane as a solvent to the parts by weight to reduce the viscosity, polyester fibers (Kuraray Co., Ltd.) treated with a silane coupling agent by degreased the surface with methanol
Wholly aromatic polyester fiber Vectran HT: Diameter 10
μm, length 1 mm) 3 parts by weight and polymer composition 1
3a was prepared.

The obtained polymer composition 13a was mixed with the polymer composition 13a shown in FIG.
As shown in (a) to (d), the surface is made of aluminum coated with a fluororesin and has a thickness of 2 mm and a length of 40 m
The polyester fiber is filled in a molding recess 11a of a plate-shaped mold 11 having a width of 120 mm and having a magnetic flux density of 10 Tesla where the N pole and the S pole of the magnet 12 as magnetic field generating means face each other. After sufficiently orienting in the horizontal direction, and evaporating the solvent hexane, the mixture was heated and hardened to be solidified, thereby producing a plate-shaped polymer composite material molded body 13. The polyester fiber 14 in the obtained polymer composite material molded body 13 is
As shown in FIG. 1 (d), it was oriented in one direction in the plane.

Similarly, the polymer composition 13a was added to FIG.
As shown in (a) to (d), the surface is made of aluminum coated with a fluororesin and has a thickness of 2 mm and a height of 40 m.
m, filled in the recessed portion 11a of the plate-shaped mold 11 having a width of 120 mm, and the thickness of the polyester fiber is increased in a magnetic field atmosphere with a magnetic flux density of 10 Tesla where the N pole and the S pole of the magnet 12 as the magnetic field generating means face each other. After the hexane as a solvent was volatilized sufficiently, it was cured by heating and solidified to produce a plate-shaped polymer composite material molded body 13. The polyester fiber 14 in the obtained polymer composite material molded body 13 is shown in FIG.
As shown in (d), it was oriented in the thickness direction.

Each of the obtained polymer composite material molded articles 13
When the tensile strength in the plane direction (JIS K6251) was measured, the tensile strength of the polymer composite material 13 in the direction parallel to the axis of the polyester fiber 14 was 26 kPa, and the tensile strength of the polymer composite material 13 in the direction perpendicular to the axis. Was 18 kPa.

Comparative Example 3 For comparison, a plate-like polymer was prepared in the same manner as in Example 4 except that the polymer composition 13a of Example 4 was cured by heating without applying a magnetic field. A composite material molded body 13 was produced. The polyester fibers 14 in each of the obtained polymer composite material molded bodies 13 were randomly dispersed as shown in FIG. 3, and no orientation was observed.

When the tensile strength (JIS K6251) of the obtained polymer composite material 13 was measured in the same manner as in Example 4, the tensile strength was 23 kPa without any anisotropy.

Example 5 Epoxy resin (TB2280C manufactured by Three Bond Co., Ltd.) 100 as a polymer material
2 parts by weight of a polyester fiber (Kuraray Co., Ltd., wholly aromatic polyester fiber Vectran HT: 10 μm in diameter, 1 mm in length) was degreased with ethanol to remove the polymer composition 13a by vacuum degassing. Prepared.

The obtained polymer composition 13a was mixed with the polymer composition 13a shown in FIG.
As shown in (a) to (d), an N-pole and an S-pole of a magnet 12 serving as a magnetic field generating means are filled in a molding concave portion 11a of a plate-shaped metal mold 11 made of aluminum coated with a fluororesin. In a magnetic field atmosphere with a magnetic flux density of 5 Tesla facing the polyester fiber, the polyester fibers were sufficiently oriented in the horizontal direction within the plane, and then cured by heating to solidify, thereby producing a plate-shaped polymer composite material molded article 13. The polyester fibers 14 in the obtained polymer composite material molded body 13 were oriented in one direction in the plane as shown in FIG.

Similarly, the polymer composition 13a is filled in a molding recess 11a of a plate-shaped metal mold 11 made of aluminum, the surface of which is coated with a fluororesin. In a magnetic field atmosphere having a magnetic flux density of 5 Tesla where the poles face each other, the polyester fibers were sufficiently oriented in the thickness direction, and then heat-cured and solidified to produce a plate-shaped polymer composite material molded body 13. The polyester fiber 14 in the obtained polymer composite material molded body 13 is shown in FIG.
As shown in (d), it was oriented in the thickness direction.

In the same manner as in Example 1, the coefficient of linear expansion (JIS K719) of each of the obtained polymer composite material molded articles 13 was determined.
7), the linear expansion coefficient of the polymer composite material 13 in the direction parallel to the axis of the polyester fiber 14 was 3.5.
× 10 ⁻⁵ / ° C., vertical axis direction polymer composite material molded body 13
Had a linear expansion coefficient of 25.1 × 10 ⁻⁵ / ° C.

Comparative Example 4 For comparison, an epoxy resin (TB22 manufactured by Three Bond Co., Ltd.) was used as a polymer material.
80C) is filled into a molding recess 11a of a plate-shaped aluminum mold 11 made of fluororesin-coated aluminum as shown in FIGS. 1 (a) and 1 (b), and is cured by heating. Then, a plate-shaped molded article of a polymer material was produced.

When the coefficient of linear expansion (JIS K7197) of the obtained molded article of the polymer material was measured in the same manner as in Example 5, the coefficient of linear expansion had no anisotropy, and was 15.4 × 10 ^−5.
/ ° C. In this comparative example, since no polyester fiber was blended, the measurement result of the flexural modulus was obtained from the polymer composite molded body 13 in the direction corresponding to each measurement direction of the polymer composite molded body 13 of Example 5. Is a value obtained by measuring the linear expansion coefficient.

Comparative Example 5 For comparison, a plate-like polymer was prepared in the same manner as in Example 5, except that the polymer composition 13a of Example 5 was cured by heating without applying a magnetic field. A composite material molded body 13 was produced. The polyester fibers 14 in the obtained polymer composite material molded article 13 were randomly dispersed as shown in FIG. 3, and no orientation was observed.

When the coefficient of linear expansion (JIS K7197) of the obtained polymer composite material 13 was measured in the same manner as in Example 5, there was no anisotropy in the coefficient of linear expansion.
It was 10 ^-5 / ° C. In this comparative example, since the polyester fibers 14 are not oriented in a certain direction, the measurement result of the coefficient of linear expansion indicates a line in a direction corresponding to each measurement direction of the polymer composite material molded body 13 of Example 1. The expansion coefficient was measured.

Example 6 As a polymer material, an unsaturated polyester resin (Epolac G15 manufactured by Nippon Shokubai Co., Ltd.)
7) To 100 parts by weight, 3 parts by weight of polyester fiber (Whole aromatic polyester fiber Vectran HT manufactured by Kuraray Co., Ltd .: diameter 10 μm, length 1 mm) was mixed to prepare a polymer composition 13a.

The obtained polymer composition 13a was mixed with the polymer composition 13a shown in FIG.
As shown in (a) to (c), the surface is made of fluororesin-coated aluminum and has a thickness of 2 mm and a height of 40 m.
The polyester fiber is filled in a molding recess 11a of a plate-shaped mold 11 having a width of 40 mm and having a magnetic flux density of 10 Tesla in which the N pole and the S pole of the magnet 12 as magnetic field generating means face each other. After being sufficiently oriented in the lateral direction in the inside, the mixture is cured at room temperature and solidified, and the plate-shaped polymer composite material molded body 13 is formed.
Was prepared. The polyester fibers 14 in the obtained polymer composite material molded body 13 were oriented in one direction in the plane as shown in FIG.

Similarly, the polymer composition 13a was added to FIG.
As shown in (a) to (c), the surface is made of fluororesin-coated aluminum and has a thickness of 2 mm and a height of 40 m.
m, a magnetic field having a magnetic flux density of 10 Tesla in which the N-pole and the S-pole of the magnet 12 as the magnetic field generating means are filled in the molding recesses 11a of the plate-shaped mold 11 having a width of 40 mm and are perpendicular to the thickness direction. In an atmosphere, the polyester fibers were sufficiently oriented in the thickness direction, and then heat-cured and solidified to obtain a plate-shaped polymer composite material molded article 13. The polyester fibers 14 in the obtained polymer composite material molded body 13 are shown in FIG.
As shown in the figure, it was oriented in the thickness direction.

Each of the obtained polymer composite material molded articles 13
FIG. 4 shows the result of measuring the transmittance spectrum in the thickness direction of the sample. The transmittance spectrum is obtained by measuring the transmittance spectrum in the thickness direction of the polymer composite material molded body 13 with an ultraviolet-visible spectrophotometer. A transmittance spectrum in the parallel direction and a transmittance spectrum in the direction perpendicular to the axis are obtained.

Comparative Example 6 For comparison, a plate-like polymer was prepared in the same manner as in Example 6, except that the polymer composition 13a of Example 6 was cured at room temperature without applying a magnetic field. A composite material molded body 13 was produced. The polyester fibers 14 in the obtained polymer composite material molded article 13 were randomly dispersed as shown in FIG. 3, and no orientation was observed.

FIG. 6 shows the result of measuring the transmittance spectrum in the thickness direction of the obtained polymer composite material 13 in the same manner as in Example 5. <Effects of Examples> Comparative Example 1 is a polymer material molded article composed of only an unsaturated polyester resin, and Comparative Example 2 is a conventional polymer composite material molded article in which polyester fibers are randomly dispersed and mixed with an unsaturated polyester resin. Example 3 is a conventional polymer composite molded article in which polyester fibers are randomly dispersed and blended in liquid silicone rubber, Comparative Example 4 is a polymer material molded article composed of only an epoxy resin alone, and Comparative Example 5 is a polyester fiber formed of an epoxy resin. A conventional polymer composite material molded article randomly dispersed and blended in Comparative Example 6 is a conventional polymer composite material molded article in which polyester fibers are randomly dispersed and blended in an unsaturated polyester resin.
No anisotropy is observed in the coefficient of linear expansion, the flexural modulus, the tensile strength, and the transmittance.

On the other hand, the polymer composite material molded products of Examples 1 to 6 of the present invention were prepared by applying a magnetic field to a polymer composition in which polyester fibers were blended in a polymer material. This is a polymer composite material molded product obtained by magnetizing and orienting the polymer composition in a certain direction, and then curing or solidifying the polymer composition. Mechanical properties,
It was recognized that anisotropy was developed in the thermal property indicated by the linear expansion coefficient and the optical property indicated by the transmittance.

(Modification) The above-described embodiment can be modified as follows. -Other synthetic resin fibers such as polyamide fiber, aramid fiber, polybenzazole fiber, polyimide fiber, polyphenylenebenzimidazole fiber, polyparaphenylene fiber, polyparaphenylenevinylene fiber, and polyphenylene sulfide fiber as functional synthetic resin fibers Use something like that. As a result, a high-performance molded article of a polymer composite material having an anisotropic function and reflecting the high functionality of these various synthetic resin fibers can be obtained.

(Technical idea grasped) Further, a technical idea grasped from the embodiment and the modified example will be described.

(1) A synthetic resin fiber having a positive anisotropic diamagnetic susceptibility χa is applied to a polymer composition blended in a polymer material by applying a magnetic field to the synthetic resin fiber. A method for producing a polymer composite material molded body, comprising magnetizing and orienting in a certain direction, and then curing or solidifying the polymer composition to form a predetermined shape. This makes it possible to orient the synthetic resin fibers in parallel along the lines of magnetic force by applying a magnetic field, so that the synthetic resin fibers are oriented in a certain direction as compared with the conventional manufacturing method of mechanically orienting the fibers. It can be highly oriented and can be easily oriented to any given direction to easily obtain a polymer composite material molded body having an anisotropic function.

(2) The method for producing a polymer composite material molded article according to (1), wherein the anisotropic diamagnetic susceptibility χa of the synthetic resin fiber is 1 × 10 ⁻⁸ or more. This makes it possible to highly orient the synthetic resin fibers in a certain direction by applying a magnetic field, thereby making it easy to control the orientation of the fibers and orienting the fibers in an arbitrary direction to have a high anisotropic function. The molecular composite material molded article can be obtained more easily.

(3) The method for producing a polymer composite material molded article according to the above (1) or (2), wherein the synthetic resin fiber is a synthetic resin fiber having an aromatic ring. Thereby, utilizing the magnetic field effect on the aromatic ring described above,
Highly oriented so that the fiber axis is parallel to the line of magnetic force, the synthetic resin fibers can be highly oriented in any given direction to form a polymer composite material molded body having an anisotropic function. It can be obtained more easily.

(4) The synthetic resin fiber has a fiber length of 10 m
m. The method for producing a polymer composite material molded product according to any one of the above (1) to (3), wherein m is equal to or less than m. As a result, the synthetic resin fibers can be uniformly dispersed in the polymer material, the molding processability can be improved, and the orientation control of the synthetic resin fibers in the polymer composition is facilitated. .

(5) The method according to any one of (1) to (4) above, wherein the amount of the synthetic resin fiber is 0.01 to 50 parts by weight based on 100 parts by weight of the polymer material. The method for producing a polymer composite material molded article of the above. This makes it easy to control the orientation of the synthetic resin fibers and to improve the practical functionality of the obtained polymer composite material molded article.

(6) The polymer material is at least one polymer selected from the group consisting of epoxy resin, unsaturated polyester resin, phenol resin, acrylic resin, urethane resin, polyimide resin, silicone resin and liquid rubber. The method for producing a polymer composite material molded article according to any one of the above (1) to (5), wherein This makes it possible to use a low-viscosity liquid when mixing the synthetic resin fibers or to reduce the viscosity during heating and melting, so that the orientation control of the synthetic resin fibers to be blended with the polymer material is facilitated. In addition, temperature characteristics such as heat resistance and electrical reliability can be improved.

(7) The synthetic resin fiber is a synthetic resin fiber selected from the group consisting of polyester fiber, polyamide fiber, aramid fiber, vinylon fiber and polyolefin fiber. The method for producing a polymer composite material molded product according to any one of the above. Thereby, a high-performance polymer composite material having an anisotropic function, which reflects the high functionality of polyester fiber, polyamide fiber, aramid fiber, vinylon fiber or polyolefin fiber, can be easily obtained.

(8) The synthetic resin fiber having a positive value of the anisotropic diamagnetic susceptibility χa is a polymer composite material molded article blended in a polymer material, wherein the synthetic resin fiber is a polymer. A polymer composite material molded article characterized by being oriented in a certain direction in a material.

(9) The polymer composite material molded article according to (8), wherein the anisotropic diamagnetic susceptibility Δa of the synthetic resin fiber is 1 × 10 ⁻⁸ or more. (10) The polymer composite material molded article according to the above (8) or (9), wherein the synthetic resin fiber is a synthetic resin fiber having an aromatic ring.

(11) The synthetic resin fiber has a fiber length of 10
(8) to (1).
0) The polymer composite material molded article according to any one of the above. (12) The amount of the synthetic resin fiber is 100
The polymer composite material molded article according to any one of the above (8) to (11), wherein the amount is 0.01 to 50 parts by weight based on parts by weight.

(13) The polymer material is an epoxy resin,
(8) to (1), which is at least one polymer material selected from the group consisting of unsaturated polyester resin, phenol resin, acrylic resin, urethane resin, polyimide resin, silicone resin and liquid rubber.
The polymer composite material molded article according to any one of 2).

(14) The synthetic resin fiber is a synthetic resin fiber selected from the group consisting of a polyester fiber, a polyamide fiber, an aramid fiber, a vinylon fiber and a polyolefin fiber.
The polymer composite material molded product according to any one of the above.

[0118]

As described in detail above, according to the present invention,
By orienting the polyester fiber blended and compounded in the polymer material in any given direction, mechanical properties such as elastic modulus and strength, thermal properties such as thermal expansion coefficient and thermal conductivity, and optical properties And a high-performance polymer composite material having an anisotropic function such as electrical properties.

Further, by applying a magnetic field to the polymer composition in which the polyester fiber is blended in the polymer material, the polyester fiber is magnetized and oriented in a certain direction, and then the polymer composition is cured or cured. By solidifying and molding into a predetermined shape, the polyester fiber can be highly oriented in any direction, and a high-performance polymer composite material having an anisotropic function can be easily produced. Can be provided.

[Brief description of the drawings]

FIGS. 1A to 1D are a cross-sectional view and a perspective view of a relevant part showing a method for producing a polymer composite material molded article (polyester fibers are oriented in one direction in a plane).

FIGS. 2A to 2D are a cross-sectional view and a perspective view of a main part showing another method for manufacturing a polymer composite material molded article (polyester fibers are oriented in a thickness direction).

FIG. 3 is a perspective view showing a conventional polymer composite material molded article in which polyester fibers are randomly dispersed and blended.

FIG. 4 is a view showing transmittance spectra of polymer composite material molded products of Example 6 and Comparative Example 6.

[Explanation of symbols]

12: magnet as a magnetic field generating means, 13: molded polymer composite material, 13a: polymer composition, 14: polyester fiber as a functional synthetic resin fiber, Δa: anisotropic diamagnetic susceptibility.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F072 AA04 AB05 AB14 AB22 AC03 AC06 AD03 AD11 AD23 AD38 AD47 AK03 AK20 AL16 AL17 4F205 AB15 AB19 AB25 AD05A AD16 AM26 AM29 HA19 HA36 HB01 HC13 HK19

Claims (11)

[Claims] 1. A polymer composite material comprising a polyester fiber blended in a polymer material, wherein the polyester fiber is oriented in a certain direction in the polymer material. Material moldings. 2. The polymer composite material molded article according to claim 1, wherein the polyester fiber is an aromatic polyester fiber. 3. The aromatic polyester fiber is a wholly aromatic polyester fiber having a structural unit derived from an aromatic dicarboxylic acid and a structural unit derived from an aromatic diol as main structural units. 3. The polymer composite material molded article according to 2. 4. The aromatic polyester fiber is a wholly aromatic polyester fiber having a structural unit derived from an aromatic hydroxycarboxylic acid as a main structural unit, or a structural unit derived from an aromatic dicarboxylic acid and an aromatic diol. The polymer composite material molded article according to claim 2, wherein the molded article is a wholly aromatic polyester fiber whose main constituent unit is a constituent unit to be formed and a constituent unit derived from an aromatic hydroxycarboxylic acid. 5. The fiber length of the polyester fiber is 10 mm.
The polymer composite material molded article according to any one of claims 1 to 4, wherein: 6. After applying a magnetic field to a polymer composition in which the polyester fiber is blended in a polymer material, the polyester fiber is magnetized and oriented in a certain direction.
A method for producing a polymer composite material molded article, comprising curing or solidifying a polymer composition to form a predetermined shape. 7. The method according to claim 6, wherein the anisotropic diamagnetic susceptibility χa of the polyester fiber is 1 × 10 ⁻⁸ or more. 8. The method for producing a polymer composite material molded article according to claim 6, wherein the polyester fiber is an aromatic polyester fiber. 9. The aromatic polyester fiber is a wholly aromatic polyester fiber having a structural unit derived from an aromatic dicarboxylic acid and a structural unit derived from an aromatic diol as main structural units. 9. The method for producing a polymer composite material molded product according to item 8. 10. The aromatic polyester fiber is a wholly aromatic polyester fiber having a structural unit derived from an aromatic hydroxycarboxylic acid as a main structural unit, or a structural unit derived from an aromatic dicarboxylic acid and an aromatic diol. 9. The method for producing a polymer composite material molded product according to claim 8, wherein the fiber is a wholly aromatic polyester fiber whose main constituent unit is a constituent unit and a constituent unit derived from an aromatic hydroxycarboxylic acid. 11. The fiber length of the polyester fiber is 10 m.
m is equal to or less than m.
The method for producing a polymer composite material molded product according to any one of the above.