JP7096654B2 - Pellets, molded products and methods for manufacturing pellets - Google Patents

Description

The present invention relates to pellets, molded articles and methods for producing pellets. In particular, the present invention relates to pellets, molded products and methods for producing pellets, which are less likely to crack during production.

Resin molded products containing glass fiber are excellent in mechanical strength, heat resistance, chemical resistance, etc., and are used as parts in the fields of automobiles, electrical and electronic equipment, precision machinery, and the like. Furthermore, with the recent demand for weight reduction of parts, parts are becoming smaller and thinner.

Under such circumstances, Patent Document 1 describes a molded product comprising a thermoplastic resin composition containing 70 to 35% by mass of a thermoplastic resin and 30 to 65% by mass of reinforced fibers having a flat shape having a flatness of 2.3 or more. Discloses a fiber-reinforced thermoplastic resin molded product characterized in that the weight average fiber length of the reinforcing fibers in the molded product is 1 mm or more.
Further, Patent Document 2 describes a glass fiber 30 having a total of 70 to 30% by mass of (A) polyamide resin and (B) polyphenylene ether resin, and (C) a flat shape having a flatness of 2.3 or more according to the following formula. A resin composition containing up to 70% by mass and having a weight average fiber length of 2 to 25 mm of glass fiber is disclosed.
Flattening = glass fiber major axis (a) / glass fiber minor axis (b)

Japanese Unexamined Patent Publication No. 2008-95066 Japanese Unexamined Patent Publication No. 2014-034606

As described above, it is known to mix glass fiber with a thermoplastic resin such as a polyamide resin. However, in recent years, the demand for polyamide resins containing glass fibers has been increasing, and the development of new materials is required.
In particular, pellets in which glass fibers are mixed with a polyamide resin have been widely studied. Further, from the viewpoint of suppressing warpage, suppressing burrs, reducing the shrinkage rate, etc., a polyphenylene ether resin, which is an amorphous resin, may be blended with the polyamide resin. However, it has been found that long fiber pellets obtained by impregnating glass fibers with such a resin component are prone to cracking. Further, in order to suppress cracking, it is conceivable to increase the pellet length, but if the pellet length is increased, the feedability to the molding machine is inferior.
The present invention is intended to solve such a problem, and relates to a pellet, a molded product, and a method for producing pellets, which are hard to break and have excellent feedability.

As a result of studies by the present inventor based on the above problems, glass fibers are obtained by blending a xylylene diamine-based polyamide resin, a polyphenylene ether resin, and an elastomer in a predetermined ratio and using flat glass fibers. It has been found that the resin can be easily impregnated into the glass, and pellets that are hard to break can be produced, and the present invention has been completed. Specifically, the above problems were solved by the following means <1> and by <2> to <6>.
<1> A pellet containing 65 to 170 parts by mass of flat glass fiber having a cross-sectional flatness of 2.3 to 5.0 with respect to 100 parts by mass of the resin component, wherein the resin component is a constituent unit derived from diamine. And 70 mol% or more of the constituent units derived from diamine are contained in a xylylene diamine-based polyamide resin derived from xylylene diamine, a polyphenylene ether resin and an elastomer, and the xylylene diamine-based polyamide is contained. The mass ratio of the polyphenylene ether resin to the resin is 1: 0.35 to 1.00, the mass ratio of the elastomer to the xylylene diamine-based polyamide resin is 1: 0.10 to 0.41, and the pellet length is: Pellets that are 2-8 mm.
<2> The pellet according to <1>, wherein the elastomer is a styrene-based block copolymer.
<3> The pellet according to <1> or <2>, wherein the number average fiber length of the flat glass fiber is 2 to 8 mm.
<4><1> to <3>, in which 50 mol% or more of the constituent units derived from the dicarboxylic acid constituting the polyamide resin are derived from α, ω-linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms. The pellet according to any one of.
<5> A molded product molded from the pellet according to any one of <1> to <4>.
<6> While opening the flat glass fiber roving having a flatness of 2.3 to 5.0 in the cross section, the flat glass fiber is impregnated with the melt of the resin component and then taken as a strand. The method for producing a pellet according to any one of <1> to <4>, which comprises cutting into a length of 2 to 8 mm.

INDUSTRIAL APPLICABILITY According to the present invention, it has become possible to provide pellets, molded products and methods for producing pellets, which are hard to break and have excellent feedability.

Hereinafter, the contents of the present invention will be described in detail. In addition, in this specification, "-" is used in the meaning which includes the numerical values described before and after it as the lower limit value and the upper limit value.

The pellet of the present invention is a pellet containing 65 to 170 parts by mass of flat glass fiber having a cross-sectional flatness of 2.3 to 5.0 with respect to 100 parts by mass of the resin component, and the resin component is derived from diamine. , 70 mol% or more of the diamine-derived structural unit contains a xylylene diamine-based polyamide resin derived from xylylene diamine, a polyphenylene ether resin, and an elastomer. The mass ratio of the polyphenylene ether resin to the amine-based polyamide resin is 1: 0.35 to 1.00, the mass ratio of the elastomer to the xylylene diamine-based polyamide resin is 1: 0.10 to 0.41, and the pellets. It is characterized by having a length of 2 to 8 mm.
With such a configuration, it becomes possible to provide pellets, molded products, and methods for producing pellets, which are not easily cracked and have excellent feedability.

<Xylylenediamine-based polyamide resin>
The pellet of the present invention is composed of a diamine-derived structural unit and a dicarboxylic acid-derived structural unit, and 70 mol% or more of the diamine-derived structural unit contains a xylylenediamine-based polyamide resin derived from xylylenediamine.
The diamine-derived constituent unit of the xylylenediamine-based polyamide resin is preferably 80 mol% or more, more preferably 85 mol% or more, still more preferably 90 mol% or more, still more preferably 95 mol% or more, still more preferably. More than 99 mol% is derived from xylylenediamine.
Further, the constituent unit derived from the dicarboxylic acid of the xylylene diamine-based polyamide resin is preferably 50 mol% or more, more preferably 70 mol% or more, still more preferably 80 mol% or more, still more preferably 90 mol% or more, still more. Preferably, 95 mol% or more, and even more preferably 99 mol% or more, are derived from α, ω-linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms.
The xylylenediamine is preferably paraxylylenediamine and metaxylylenediamine, and more preferably contains at least metaxylylenediamine.

Examples of diamines other than methoxylylenediamine and paraxylylenediamine that can be used as a raw material diamine component for xylylenediamine-based polyamide resin include tetramethylenediamine, pentamethylenediamine, 2-methylpentanediamine, hexamethylenediamine, and heptamethylene. An aliphatic diamine such as diamine, octamethylenediamine, nonamethylenediamine, decamethylenediamine, dodecamethylenediamine, 2,2,4-trimethyl-hexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, 1,3- Bis (aminomethyl) cyclohexane, 1,4-bis (aminomethyl) cyclohexane, 1,3-diaminocyclohexane, 1,4-diaminocyclohexane, bis (4-aminocyclohexyl) methane, 2,2-bis (4-amino) Arocyclic diamines such as cyclohexamethylene) propane, bis (aminomethyl) decalin, bis (aminomethyl) tricyclodecane, bis (4-aminophenyl) ether, paraphenylenediamine, bis (aminomethyl) naphthalene and the like. Examples thereof include diamine having, and one kind or a mixture of two or more kinds can be used.

Examples of the α, ω-linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms preferable to be used as the raw material dicarboxylic acid component of the xylylene diamine-based polyamide resin include succinic acid, glutaric acid, pimelic acid, and sveric acid. Examples thereof include aliphatic dicarboxylic acids such as azelaic acid, adipic acid, sebacic acid, undecanedioic acid, and dodecanedioic acid, and one kind or a mixture of two or more kinds can be used. Among these, adipic acid or sebacic acid is more preferable, and adipic acid is further preferable, because the melting point of the xylylenediamine-based polyamide resin is in an appropriate range for molding.

Examples of the dicarboxylic acid component other than the α, ω-linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms include phthalic acid compounds such as isophthalic acid, terephthalic acid, and orthophthalic acid, 1,2-naphthalenedicarboxylic acid, 1, 3-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 1,6-naphthalenedicarboxylic acid, 1,7-naphthalenedicarboxylic acid, 1,8-naphthalenedicarboxylic acid, 2,3- Examples of naphthalenedicarboxylic acid compounds such as naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, and 2,7-naphthalenedicarboxylic acid can be exemplified, and one kind or a mixture of two or more kinds can be used.

The xylylene diamine-based polyamide resin is mainly composed of a diamine-derived structural unit and a dicarboxylic acid-derived structural unit, but the other structural units are not completely excluded, and ε-caprolactam and lauro Needless to say, it may contain a constituent unit derived from lactams such as lactam and aliphatic aminocarboxylic acids such as aminocaproic acid and aminoundecanoic acid. Here, the main component means that among the constituent units constituting the xylylenediamine-based polyamide resin, the total number of the constituent units derived from diamine and the constituent units derived from dicarboxylic acid is the largest among all the constituent units. In the present invention, the total of the diamine-derived constituent units and the dicarboxylic acid-derived constituent units in the xylylenediamine-based polyamide resin preferably occupies 90% or more of all the constituent units, and more preferably 95% or more. ..

The melting point of the xylylenediamine-based polyamide resin is preferably 150 to 350 ° C., more preferably 180 to 330 ° C., further preferably 200 to 330 ° C., and preferably 200 to 320 ° C. More preferred.
The melting point in the present invention means the temperature of the peak top of the endothermic peak at the time of temperature rise observed by the DSC (differential scanning calorimetry) method.
A DSC measuring device is used for the measurement, the sample amount is about 1 mg, nitrogen is flowed as an atmospheric gas at 30 mL / min, and the temperature rise rate is from room temperature to a temperature above the expected melting point under the condition of 10 ° C./min. The melting point can be obtained from the temperature of the peak top of the heat absorption peak observed when heated and melted. As the DSC measuring instrument, a DSC-60 manufactured by SHIMADZU CORPORATION can be used.

The lower limit of the number average molecular weight (Mn) of the xylylenediamine-based polyamide resin is preferably 6,000 or more, more preferably 8,000 or more, still more preferably 10,000 or more. It is more preferably 15,000 or more. The upper limit of Mn is preferably 35,000 or less, more preferably 30,000 or less, further preferably 28,000 or less, and even more preferably 26,000 or less. Within such a range, heat resistance, elastic modulus, dimensional stability, and moldability become better.

The lower limit of the content of the xylylenediamine-based polyamide resin in the resin component is 50% by mass or more, more preferably 55% by mass or more, and further preferably 60% by mass or more. Further, the upper limit of the content of the xylylenediamine-based polyamide resin in the resin component is preferably 80% by mass or less, more preferably 75% by mass or less, and further preferably 70% by mass or less. preferable.
The resin component may contain only one kind of xylylenediamine-based polyamide resin, or may contain two or more kinds. When two or more kinds are contained, it is preferable that the total amount is within the above range.

<Polyphenylene ether resin>
The polyphenylene ether resin used in the resin pellet of the present invention is a polymer having a structural unit represented by the following formula in the main chain, and may be either a homopolymer or a copolymer.

（式中、２つのＲ^ａは、それぞれ独立に、水素原子、ハロゲン原子、第１級もしくは第２級アルキル基、アリール基、アミノアルキル基、ハロゲン化アルキル基、炭化水素オキシ基、またはハロゲン化炭化水素オキシ基を表し、２つのＲ^ｂは、それぞれ独立に、水素原子、ハロゲン原子、第１級もしくは第２級アルキル基、アリール基、ハロゲン化アルキル基、炭化水素オキシ基、またはハロゲン化炭化水素オキシ基を表す。ただし、２つのＲ^ａがともに水素原子になることはない。）

(In the formula, the two ^Ras are independently hydrogen atom, halogen atom, primary or secondary alkyl group, aryl group, aminoalkyl group, alkyl halide group, oxyhydrocarbon group, or halogenated group. Representing a hydrocarbon oxy group, the two R ^bs independently represent a hydrogen atom, a halogen atom, a primary or secondary alkyl group, an aryl group, an alkyl halide group, an oxyhydrocarbon group, or a hydrocarbon carbide. Represents a hydrogenoxy group. However, neither of the two Ras becomes ^a hydrogen atom.)

As R ^a and R ^b , a hydrogen atom, a primary or secondary alkyl group, and an aryl group are preferable. Preferable examples of the primary alkyl group are methyl group, ethyl group, n-propyl group, n-butyl group, n-amyl group, isoamyl group, 2-methylbutyl group, 2,3-dimethylbutyl group, 2 -, 3- Or 4-methylpentyl group or heptyl group can be mentioned. Preferable examples of the secondary alkyl group include, for example, an isopropyl group, a sec-butyl group or a 1-ethylpropyl group. In particular, Ra is preferably ^a primary or secondary alkyl group or phenyl group having 1 to 4 carbon atoms. R ^b is preferably a hydrogen atom.

Suitable homopolymers of the polyphenylene ether resin include, for example, poly (2,6-dimethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, and poly (2, 6-Dipropyl-1,4-phenylene) ether, poly (2-ethyl-6-methyl-1,4-phenylene) ether, poly (2-methyl-6-propyl-1,4-phenylene) ether and the like 2 , 6-Dialkylphenylene ether polymers. Examples of the copolymer include 2,6-dimethylphenol / 2,3,6-trimethylphenol copolymer, 2,6-dimethylphenol / 2,3,6-triethylphenol copolymer, and 2,6-diethylphenol. 2,6-Dialkylphenol / 2,3,6-trialkylphenol such as / 2,3,6-trimethylphenol copolymer, 2,6-dipropylphenol / 2,3,6-trimethylphenol copolymer, etc. Polymer, graft copolymer obtained by graft-polymerizing styrene on poly (2,6-dimethyl-1,4-phenylene) ether, styrene on 2,6-dimethylphenol / 2,3,6-trimethylphenol copolymer Examples thereof include a graft copolymer obtained by graft-polymerizing the above.

As the polyphenylene ether resin in the present invention, poly (2,6-dimethyl-1,4-phenylene) ether and 2,6-dimethylphenol / 2,3,6-trimethylphenol random copolymer are particularly preferable. Further, a polyphenylene ether resin having a specified number of terminal groups and a copper content as described in Japanese Patent Application Laid-Open No. 2005-344065 can also be preferably used.

The viscosity of the polyphenylene ether resin is preferably 0.2 to 0.8 dL / g at 30 ° C. measured in chloroform, and more preferably 0.3 to 0.6 dL / g. By setting the intrinsic viscosity to 0.2 dL / g or more, the mechanical strength of the resin pellets tends to be further improved, and by setting it to 0.8 dL / g or less, the fluidity is further improved and the molding process is further improved. It tends to be easier. Further, two or more kinds of polyphenylene ether resins having different intrinsic viscosities may be used in combination to set the range of the intrinsic viscosity.

The method for producing the polyphenylene ether resin used in the present invention is not particularly limited, and a method for oxidatively polymerizing a monomer such as 2,6-dimethylphenol in the presence of an amine copper catalyst according to a known method. At that time, the intrinsic viscosity can be controlled within a desired range by selecting the reaction conditions. Control of intrinsic viscosity can be achieved by selecting conditions such as polymerization temperature, polymerization time, and amount of catalyst.

In the pellet of the present invention, the mass ratio of the polyphenylene ether resin to the xylylenediamine-based polyamide resin is 1: 0.35 to 1.00, preferably 1: 0.35 to 0.80, preferably 1: 0. It is more preferably .35 to 0.50.
The proportion of the polyphenylene ether resin in the resin component is preferably 15 to 35% by mass, more preferably 20 to 30% by mass.
In the present invention, one type of polyphenylene ether resin may be used alone, or two or more types may be mixed and used. When two or more kinds are contained, it is preferable that the total amount is within the above range.

<Elastomer>
The pellet of the present invention contains an elastomer. The elastomer is preferably a styrene-based block copolymer.
Examples of the styrene-based block polymer used in the present invention include styrene / butadiene / styrene block copolymers (SBS, triblock), styrene / butadiene / styrene block copolymer hydrogenated products (SEBS, triblock), and the like. Styrene / isoprene / styrene block copolymer (SIS, triblock), styrene / isoprene / styrene block copolymer hydrogenated product (SEPS, triblock), styrene / butadiene / isoprene / styrene block copolymer (SBIS, Triblock), styrene / butadiene / isoprene / styrene block copolymer hydroxides (SEEPS, triblock), carboxyl-modified styrene-based block copolymers as described above, and even in styrene blocks. In addition to styrene, a copolymer of styrene and an aromatic vinyl compound such as α-methylstyrene is also exemplified.

Among these styrene-based block copolymers, hydrogenated styrene / butadiene / styrene block copolymers (SEBS, triblock) are preferable.

The ratio of styrene contained in the styrene-based block copolymer is preferably 10 to 40% by mass, more preferably 15 to 35% by mass, based on the total amount of the styrene-based block copolymer.

In the pellet of the present invention, the amount of the elastomer with respect to the xylylenediamine-based polyamide resin is 1: 0.10 to 0.41 and preferably 1: 0.10 to 0.20.
The proportion of the elastomer in the resin component is preferably 3 to 20% by mass, more preferably 5 to 15% by mass, and even more preferably 6 to 12% by mass.
In the present invention, one type of elastomer may be used alone, or two or more types may be mixed and used. When two or more kinds are contained, it is preferable that the total amount is within the above range.

<Other resin components>
The resin component may contain a polyamide resin other than the xylylene diamine-based polyamide resin, and a thermoplastic resin other than the polyphenylene ether resin and the elastomer.
Other polyamide resins include polyamide 4, polyamide 6, polyamide 11, polyamide 12, polyamide 46, polyamide 66, polyamide 610, polyamide 612, polyhexamethylene terephthalamide (polyamide 6T), and polyhexamethylene isophthalamide (polyamide 6T). 6I), Polyamide 66 / 6T, Polyamide 9T, Polyamide 9MT, Polyamide 6I / 6T and the like. These other polyamide resins may contain only one kind, or may contain two or more kinds.
Examples of other thermoplastic resins include polyester resins, polyacetal resins, polyolefin resins, polycarbonate resins, aromatic vinyl compound polymers and the like. These resins may contain only one kind or two or more kinds.
The blending amount of the other polyamide resin and the other thermoplastic resin is preferably 10% by mass or less, more preferably 5% by mass or less, and further preferably 2% by mass or less of the resin component. It is particularly preferable that it is not substantially contained. The term "substantially not contained" means that the mixture is not positively blended, and does not mean that impurities and other substances that are unintentionally contained are excluded.

The pellet of the present invention preferably contains a resin component in the pellet of the present invention in an amount of 35% by mass or more, more preferably 40% by mass or more, and further preferably 45% by mass or more. Further, the pellet of the present invention preferably contains the resin component in the pellet of the present invention in a proportion of 70% by mass or less, more preferably 65% by mass or less, and more preferably 60% by mass or less. It is more preferable to include in.

<Flat glass fiber>
The pellet of the present invention contains 65 to 170 parts by mass of flat glass fiber having a flatness of 2.3 to 5.0 in cross section with respect to 100 parts by mass of the resin component.
By using the flat glass fiber, the impregnation property of the resin component can be improved.
The flattening is preferably 2.5 or more, more preferably 3.0 or more, and even more preferably 3.5 or more. Further, the flattening ratio is preferably 4.5 or less.
The blending amount of the flat glass fiber is preferably 80 parts by mass or more, more preferably 90 parts by mass or more, and may be 100 parts by mass or more with respect to 100 parts by mass of the resin component. The blending amount of the flat glass fiber is preferably 160 parts by mass or less, more preferably 150 parts by mass or less, and further preferably 140 parts by mass or less with respect to 100 parts by mass of the resin component. It is more preferably 130 parts by mass or less, and may be 120 parts by mass or less. The flat glass fiber may contain only one kind, or may contain two or more kinds. When two or more kinds are contained, it is preferable that the total amount is within the above range.
Further, in the pellet of the present invention, the total amount of the resin component and the flat glass fiber preferably occupies 85% by mass or more, more preferably 90% by mass or more, and further occupying 95% by mass or more. preferable.

The number average fiber length of the flat glass fibers in the pellet of the present invention is preferably 2 mm or more, preferably 3 mm or more, preferably 8 mm or less, and more preferably 7 mm or less. It may be 6 mm or less. The average fiber length of the glass fiber is a number average fiber length, and when molding by a drawing molding method or the like, the cut length is the average fiber length of the glass fiber. That is, as one embodiment of the present invention, an embodiment in which the difference between the pellet length and the number average fiber length of the flat glass is less than 1 mm (preferably 0.5 mm or less) is exemplified. More specifically, an embodiment in which the pellet length and the number average fiber length of the flat glass are the same is exemplified. The same here means the same to the extent that the pellet length and the number average fiber length of the glass fibers when molded by the pultrusion method or the like are the same as the cut length, and in a mathematical sense. It does not mean the same thing. Needless to say, the pellets in the embodiment in which the pellet length and the number average fiber length of the flat glass are the same are not limited to the pellets produced by the pultrusion method.

<Other strengthening agents>
The pellet of the present invention may contain a glass fiber other than the flat glass fiber and a reinforcing agent other than the glass fiber. For example, glass fiber (round glass fiber) having a circular cross section, carbon fiber, aramid fiber, mica, wallastnite, potassium titanate, calcium carbonate, silica and the like can be mentioned. However, in the present invention, the blending amount of the reinforcing agent other than the flat glass fiber as the reinforcing agent is preferably 10% by mass or less and 5% by mass or less of the flat glass fiber contained in the pellet of the present invention. More preferably, it is more preferably 1% by mass or less.

<Other ingredients>
When producing the pellet of the present invention, other components may be blended. Other components include compatibilizers, talc, mold release agents, pigments, copper halides (eg copper iodide, copper chloride, copper bromide) and / or alkali metal halides (eg potassium iodide). , Stabilizers such as potassium bromide), antioxidants such as hindered phenols and phosphite, mold release improvers, flame retardants and / or flame retardant aids, dyes, dispersants, antioxidants. , UV absorbers, impact resistant improvers and other well known additives can be blended.
For details of these additives, the description in paragraphs 0057 to 0063 of JP-A-2008-95066 can be referred to, and such contents are incorporated in the present specification.

<< Compatibility Agent >>
The pellet of the present invention may contain a compatibilizer for a polyphenylene ether resin and a polyamide resin. Preferred examples of the compatibilizer include unsaturated acids, unsaturated acid anhydrides and derivatives thereof.

The compatibilizers are preferably maleic acid, itaconic acid, chloromaleic acid, citraconic acid, butenyl succinic acid, tetrahydrophthalic acid, and anhydrides thereof, as well as these acid halides such as maleimide, monomethyl maleate, dimethyl maleate, etc. Examples thereof include amides, imides, alkyl or glycol esters having 1 to 20 carbon atoms, and more preferably maleic acid and maleic anhydride.
When the pellet of the present invention contains a compatibilizer, the content of the compatibilizer is preferably 0.005 to 5.0 parts by mass, and 0.01 to 3.0 parts by mass with respect to 100 parts by mass of the resin component. It is more preferably parts by mass, more preferably 0.015 to 2.0 parts by mass, and even more preferably 0.02 to 1.0 parts by mass.
As the compatibilizer, only one kind may be used, or two or more kinds may be used in combination. In the case of two or more kinds, it is preferable that the total amount is within the above range.

<< Talc >>
The pellets of the present invention may contain talc. Crystallization can be promoted by blending talc.
The blending amount of talc in the pellet of the present invention is preferably 0.05 to 20.0 parts by mass, more preferably 0.1 to 10.0 parts by mass with respect to 100 parts by mass of the resin component. , 0.15 to 5.0 parts by mass, and particularly preferably 0.2 to 2.0 parts by mass.
Only one type of talc may be used, or two or more types may be used in combination. In the case of two or more kinds, it is preferable that the total amount is within the above range.

<< Release agent >>
The pellet of the present invention may contain a mold release agent. By blending a mold release agent, it is possible to improve the mold release property from the mold at the time of molding.
Specific examples of the release agent include the release agents described in paragraphs 0034 to 0040 of JP-A-2017-11593, and the contents thereof are incorporated in the present specification. The mold release agent in the present invention is preferably a fatty acid metal salt. As the fatty acid, stearic acid and montanic acid are preferable, and montanic acid is more preferable. As the metal constituting the fatty acid metal salt, an alkaline earth metal is preferable, calcium and barium are more preferable, and calcium is further preferable.
When the pellet of the present invention contains a mold release agent, the content of the mold release agent is preferably 0.005 to 5.0 parts by mass, and 0.01 to 3.0 parts by mass with respect to 100 parts by mass of the resin component. It is more preferably parts by mass, more preferably 0.015 to 2.0 parts by mass, and even more preferably 0.02 to 1.0 parts by mass.
Only one type of release agent may be used, or two or more types may be used in combination. In the case of two or more kinds, it is preferable that the total amount is within the above range.

<< Pigment >>
The pellet of the present invention may contain a pigment. The pigment may be a chromatic pigment or an achromatic pigment, and an achromatic pigment is preferable, and a black pigment is more preferable.

The type of pigment is not particularly specified, but pigments such as carbon black and titanium black are preferable, and carbon black is more preferable.
As the carbon black used in the present invention, any conventionally known carbon black can be used. For example, furnace black, channel black, ketjen black, acetylene black and the like can be mentioned. Above all, it is preferable to use carbon black having a DBP absorption amount of 30 to 300 g / 100 ^cm3 , which is excellent in hiding power, particularly furnace black, because stable color tone can be developed.

The blending amount of the pigment in the pellet of the present invention is preferably 0.1 part by mass or more, more preferably 0.5 part by mass or more, still more preferably 1.0 part by mass or more with respect to 100 parts by mass of the resin component. .. The upper limit is 10.0 parts by mass or less, preferably 7.0 parts by mass or less, and more preferably 5.0 parts by mass or less with respect to 100 parts by mass of the resin component.
Only one kind of pigment may be used, or two or more kinds of pigments may be used in combination. When two or more kinds are used in combination, it is preferable that the total amount is within the above range.

<Pellet length>
The pellet of the present invention has a pellet length of 2 to 8 mm. If the pellet length is less than 2 mm, the pellets are liable to crack during the production of the pellets. Further, if the pellet length exceeds 8 mm, the feedability of the pellets when manufacturing a molded product is inferior. Specifically, if the pellet length is long, a hopper bridge may occur during molding.
The pellet length is preferably 2 mm or more, preferably 3 mm or more, preferably 8 mm or less, more preferably 7 mm or less, and may be 6 mm or less.
The pellet length refers to the length of the longest portion of the pellet, and is the same as the length when the strand is cut (cut length) when manufactured through the strand. Therefore, the pellet length is the number average length of the longest portion of the pellet.

<Pellet manufacturing method>
The method for producing the pellets of the present invention is not particularly specified, and the pellets can be produced according to a known method.
As an example of the method for producing pellets of the present invention, the flat glass fibers having a flatness of 2.3 to 5.0 in cross section are impregnated with a melt of a resin component while opening the flat glass fiber roving. After that, a method for producing pellets, which comprises taking it as a strand and cutting it into a length of 2 to 8 mm can be mentioned.
Further, the method described in paragraph 0034 of JP-A-2014-034606 can also be used.

<Molded product>
The present invention also discloses a molded product molded from the pellet of the present invention. The method for producing the molded product of the present invention is not particularly limited, and a molding method generally used for thermoplastic resins, that is, a molding method such as injection molding, hollow molding, extrusion molding, or press molding can be applied. ..
Molded products include single-layer films (meaning that they include single-layer sheets), multilayer films (meaning that they include multi-layer sheets), fibers, threads, ropes, tubes, hoses, various molding materials, containers, and various parts. Examples include finished products, housings, and the like.

The molded product of the present invention includes transport machine parts such as automobiles, general machine parts, precision machine parts, electronic / electrical equipment parts, OA equipment parts, building materials / housing related parts, medical equipment, leisure sports equipment, play equipment, and medical products. Widely used in containers for food and food, defense and aerospace products.

Hereinafter, the present invention will be described in more detail with reference to examples. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be appropriately changed as long as they do not deviate from the gist of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below.

<Raw materials>
Polyamide resin: MXD6 (methaxylylene adipamide resin), manufactured by Mitsubishi Gas Chemical Company, S6001, melting point 237 ° C, number average molecular weight 16800
Polyphenylene ether resin: PX100L, Mitsubishi Engineering Plastics competing agent: maleic anhydride, Crystalman AB, Elastomer manufactured by Nippon Oil & Fats Co., Ltd. (1): Septon 8006, Kuraray, SEBS, styrene ratio 33% by mass flat glass fiber Robbing: Nitto Boseki, RSG 60QM-483HS (600TEX), flatness 4.0
Round glass fiber roving: EX-1400 (2400TEX) manufactured by Nippon Electric Glass Co., Ltd., flatness of about 1.0 elastomer (2): Clayton FG1901GT, Clayton Japan Co., Ltd., SEBS, styrene ratio 30% by mass
Talc: Micron White 5000S, Hayashi Kasei Co., Ltd. Release Agent: Recommont CAV102, Clariant Japan Co., Ltd. Pigment: Carbon Black, Mitsubishi Chemical Corporation, # 45

<Measurement of flattening>
The flatness in the present invention is a value represented by a major axis (a) / a minor axis (b) based on the major axis (a) and the minor axis (b) of the cross section in the direction perpendicular to the longitudinal direction of the glass fiber. The cross section of the glass fiber was measured in actual size from a micrograph and calculated from the average value of any five places.

<Manufacturing method of resin pellets>
A polyphenylene ether resin, a compatibilizer, and an elastomer (1) at a cylinder temperature of 280 ° C. and a screw rotation speed of 350 rpm using a twin-screw extruder (screw diameter 30 mm, L / D = 42) at the ratios shown in Table 1. ) Was uniformly mixed with a high-speed mixer, charged into the upstream portion of the extruder, and melt-kneaded to obtain a polyphenylene ether resin composition.
Top feed of the polyphenylene ether resin composition obtained above and the polyamide resin, elastomer (2), talc, mold release agent, and pigment shown in Table 1 in a twin-screw extruder (trade name: ZSK25, manufactured by Coperion). It was supplied from the mouth at the ratio (unit: parts by mass) shown in Table 1 below, and melt-kneaded at a set cylinder temperature of the polyamide resin at the melting point of + 40 ° C. and a screw rotation speed of 300 rpm to obtain a melt of the resin component. ..
While the glass fiber roving was opened and pulled, it was impregnated with the melt of the resin component obtained above, and then taken as a strand through an impregnated die at a take-up speed of 19 m / min, and the pellet length was the length shown in Table 1. It was cut so as to obtain pellets. The cut length and the fiber length of the glass fiber in the pellet were the same length.

<Evaluation method of pellet cracking degree>
Among the pellets obtained above, 100 pellets arbitrarily selected were evaluated for the degree of cracked pellets as follows.
A: Pellet cracking is less than 10% B: Pellet cracking is 10% or more and less than 30% C: Pellet cracking is 30% or more

<Evaluation of feedability>
An ISO dumbbell test piece using an injection molding machine (J55AD-2M, manufactured by Japan Steel Works, Ltd.) under the conditions of a cylinder temperature of 280 ° C, a mold temperature of 130 ° C, a screw rotation speed of 80 rpm, and a back pressure of 5 MPa. The biting property of the pellets in the hopper was evaluated when 100 pieces were molded in a molding cycle of 45 seconds.
A: The pellets had good biteability and no hopper bridge was generated.
B: Pellets bite poorly, and a hopper bridge occurred.

The results are shown in Table 1 below.

As is clear from the above results, the pellet of the present invention had less pellet cracking and was excellent in feedability (Examples 1 and 2).
On the other hand, when round glass fiber was used (Comparative Examples 1 and 2), pellet cracking occurred. Further, when the proportion of the polyphenylene ether resin was large (Comparative Example 3), the viscosity of the resin component became high, the impregnation property decreased, and pellet cracking occurred. On the other hand, when the proportion of the elastomer (2) was small (Comparative Example 4), the toughness of the pellet was lowered and the pellet cracked. Further, when the proportion of the elastomer (2) was large (Comparative Example 5), the viscosity of the resin component became high, the impregnation property decreased, and pellet cracking occurred.
Further, when the pellet length was long (Comparative Example 6), the pellet cracking could be suppressed, but the feedability was inferior. More specifically, a hopper bridge has occurred during molding.

Claims (5)

A pellet containing 65 to 170 parts by mass of flat glass fiber having a cross-sectional flatness of 2.3 to 5.0 with respect to 100 parts by mass of the resin component.
The resin component is composed of a diamine-derived structural unit and a diamine-derived structural unit, and 70 mol% or more of the diamine-derived structural unit is a xylylenediamine-based polyamide resin, a polyphenylene ether resin, and a xylylenediamine-derived constituent unit. Contains elastomer
The mass ratio of the polyphenylene ether resin to the xylylenediamine-based polyamide resin is 1: 0.35 to 1.00.
The mass ratio of the elastomer to the xylylenediamine-based polyamide resin is 1: 0.10 to 0.41, and the pellet length is 2 to 8 mm .
The elastomer is a styrene / butadiene / styrene block copolymer, a styrene / butadiene / styrene block copolymer hydrogenated product, a styrene / isoprene / styrene block copolymer, and a styrene / isoprene / styrene block copolymer hydrogenated product. A styrene-based block copolymer selected from a polymer, a styrene / butadiene / isoprene / styrene block copolymer, and a hydrogenated product of a styrene / butadiene / isoprene / styrene block copolymer, and the styrene-based block copolymer weight. Pellets which are at least one selected from styrene-based block copolymers in which the coalescence is carboxyl-modified . The pellet according to claim 1, wherein the number average fiber length of the flat glass fiber is 2 to 8 mm. The pellet according to claim 1 or 2 , wherein 50 mol% or more of the constituent units derived from the dicarboxylic acid constituting the polyamide resin are derived from α, ω-linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms. A molded product molded from the pellet according to any one of claims 1 to 3 . While opening the flat glass fiber roving having a flatness of 2.3 to 5.0 in the cross section, the flat glass fiber is impregnated with the melt of the resin component and then picked up as a strand to 2 to 8 mm. The method for producing pellets according to any one of claims 1 to 3 , which comprises cutting into the length of the above.