JPWO2014088105A1 - Resin molded body - Google Patents

Abstract

To provide a resin molded article having excellent load resistance, impact resistance, rigidity, flame retardancy, and appearance. The present invention is composed of a thermoplastic resin composition containing polybutylene terephthalate, polyethylene terephthalate and / or polycarbonate, brominated acrylic flame retardant, antimony compound, and glass fiber, and conforms to ISO527-1,2. The value obtained by multiplying the measured tensile strength and tensile elongation is 3 MPa or more, the Charpy impact value at 23 ° C. measured according to ISO 179 / 1eA is 9 kJ / m 2 or more, and conforms to ISO 178. The flame elasticity measured in accordance with UL94 is V-0 or more under the conditions where the bending elastic modulus is 8000 MPa or more and the thickness is 2 mm, and the gloss measured in accordance with JIS Z8741 is 90 to It is 110% and provides a resin molded body used outdoors.

Description

  The present invention relates to a resin molded body.

  Thermoplastic resins (polybutylene terephthalate and the like) are used as raw materials for electrical and electronic parts for reasons such as excellent electrical properties, chemical resistance, and water resistance.

  In particular, since electrical and electronic parts are required to have safety against fires, etc., they are often required to satisfy various standards relating to flame retardancy represented by US UL standards. As a technique for imparting flame retardancy to a thermoplastic resin, a technique is known in which a halogen compound containing chlorine, bromine or the like is blended in a thermoplastic resin. As such a technique, for example, a technique described in Patent Document 1 is cited.

  In addition, a technique in which a halogen compound and an antimony compound are used in combination in order to further enhance the flame retardant effect is also known. As such a technique, for example, a technique described in Patent Document 2 is cited.

JP-A-11-111376 JP 2007-146118 A

  However, a thermoplastic resin composition containing a halogen compound or an antimony compound has high flame retardancy, but tends to cause a decrease in other characteristics (such as mechanical characteristics) required for electric and electronic parts. Therefore, in addition to mechanical properties such as load resistance, impact resistance, and rigidity, as in the case of electrical and electronic parts used outdoors, there is a demand for a good appearance at the part that is in contact with the human eye. In applications having many characteristics, it has been difficult for conventional resin compositions to adjust a number of characteristics within a desired range.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to provide a resin molded article having excellent load resistance, impact resistance, rigidity, flame retardancy, and appearance. It is in.

  The inventors of the present invention have made extensive studies to solve the above problems. As a result, the present inventors have found that the above problems can be solved by a thermoplastic resin composition containing polybutylene terephthalate, polyethylene terephthalate and / or polycarbonate, brominated acrylic flame retardant, antimony compound, and glass fiber. It came to complete. More specifically, the present invention provides the following.

(1) polybutylene terephthalate;
Polyethylene terephthalate and / or polycarbonate;
A brominated acrylic flame retardant;
An antimony compound,
It is composed of a thermoplastic resin composition containing glass fiber,
A value obtained by multiplying the values of tensile strength and tensile elongation measured in accordance with ISO527-1, 2 is 3 MPa or more,
The Charpy impact value measured at 23 ° C. according to ISO 179 / 1eA is 9 kJ / m ² or more,
The flexural modulus measured according to ISO 178 is 8000 MPa or more,
Flame retardancy measured according to UL94 under the condition of thickness 2mm is V-0 or more,
A resin molded article having a glossiness of 90 to 110% measured according to JIS Z8741 and used outdoors.

  (2) The resin molding as described in (1) whose mass ratio of the said polybutylene terephthalate and the said polyethylene terephthalate and / or polycarbonate is 2/1-4/1.

  (3) The resin molded product according to (1) or (2), wherein the brominated acrylic flame retardant is polypentabromobenzyl acrylate.

  (4) The resin fiber according to any one of (1) to (3), wherein the glass fiber has a major axis / minor axis ratio of 2 to 4 and a flat cross section.

  (5) The thermoplastic resin composition according to any one of (1) to (4), further including an elastomer.

  (6) The resin molded product according to (5), wherein the elastomer is an olefin elastomer.

  (7) The resin molded body according to any one of (1) to (6), wherein the resin molded body is a housing for housing a connector, a plug, or an electrical / electronic component for an electrical / electronic component.

  (8) The resin molded body according to (7), wherein the connector is a solar cell component, a breaker component, a switch component, or an electric vehicle component.

  According to the present invention, a resin molded article having excellent load resistance, impact resistance, rigidity, flame retardancy, and appearance is provided.

It is a figure which shows the test piece used in order to measure flatness.

  Hereinafter, embodiments of the present invention will be described. In addition, this invention is not limited to the following embodiment.

  The resin molded body of the present invention is composed of a thermoplastic resin composition containing polybutylene terephthalate, polyethylene terephthalate and / or polycarbonate, brominated acrylic flame retardant, antimony compound, and glass fiber, and has predetermined characteristics. And used outdoors. Hereinafter, the composition of the thermoplastic resin composition in the present invention, the characteristics of the resin molded body of the present invention, and the like will be described.

<Thermoplastic resin composition>
The thermoplastic resin composition constituting the resin molding of the present invention contains polybutylene terephthalate, polyethylene terephthalate and / or polycarbonate, brominated acrylic flame retardant, antimony compound, and glass fiber.

[Polybutylene terephthalate]
The polybutylene terephthalate is a dicarboxylic acid component containing at least terephthalic acid or an ester-forming derivative thereof (C1-C6 alkyl ester, acid halide, etc.), and an alkylene glycol (1,4-butanediol) having at least 4 carbon atoms. ) Or a polyester resin obtained by polycondensation with a glycol component containing an ester-forming derivative thereof. The polybutylene terephthalate in the present invention may be homopolybutylene terephthalate or a copolymer containing 60 mol% or more (particularly 75 mol% or more and 95 mol% or less) of butylene terephthalate units.

  In polybutylene terephthalate, examples of dicarboxylic acid components (comonomer components) other than terephthalic acid and its ester-forming derivatives include, for example, isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, 4,4′-dicarboxydiphenyl ether, and the like. C8-C14 aromatic dicarboxylic acids; C4-C16 alkyl dicarboxylic acids such as succinic acid, adipic acid, azelaic acid, sebacic acid; C5-C10 cycloalkyl dicarboxylic acids such as cyclohexane dicarboxylic acid; and these dicarboxylic acid components Ester-forming derivatives (C1-C6 alkyl ester derivatives, acid halides, etc.). These dicarboxylic acid components can be used alone or in combination of two or more.

  Examples of glycol components (comonomer components) other than 1,4-butanediol in polybutylene terephthalate include, for example, ethylene glycol, propylene glycol, trimethylene glycol, 1,3-butylene glycol, hexamethylene glycol, neopentyl glycol, 1 C2-C10 alkylene glycol such as 1,3-octanediol; polyoxyalkylene glycol such as diethylene glycol, triethylene glycol and dipropylene glycol; alicyclic diol such as cyclohexanedimethanol and hydrogenated bisphenol A; bisphenol A, 4, Aromatic diols such as 4'-dihydroxybiphenyl; 2 mol adduct of bisphenol A ethylene oxide, 3 mol adduct of bisphenol A propylene oxide, etc. C2-C4 alkylene oxide adducts of bisphenol A; or ester-forming derivatives of these glycols (acetylated compounds, etc.). These glycol components can be used alone or in combination of two or more.

  The amount of terminal carboxyl groups of polybutylene terephthalate is not particularly limited as long as the object of the present invention is not impaired. The amount of terminal carboxyl groups of polybutylene terephthalate is preferably 30 meq / kg or less, and more preferably 25 meq / kg or less.

  The intrinsic viscosity of polybutylene terephthalate is not particularly limited as long as the object of the present invention is not impaired. The intrinsic viscosity of polybutylene terephthalate is preferably 0.60 dL / g or more and 1.20 dL / g or less. When polybutylene terephthalate having an intrinsic viscosity in the above range is used, the moldability of the resulting thermoplastic resin composition is particularly good.

  In the thermoplastic resin composition of the present invention, the content of polybutylene terephthalate may be 30% by mass or more and 60% by mass or less in the thermoplastic resin composition. When the content of polybutylene terephthalate is within the above range, preferred properties possessed by polybutylene terephthalate can be imparted to the resin molded body. A more preferable content is 30% by mass or more and 50% by mass or less in the thermoplastic resin composition.

[polyethylene terephthalate]
Polyethylene terephthalate is a polycondensation of terephthalic acid or its ester-forming derivatives (C _1-6 alkyl esters, acid halides, etc.) and ethylene glycol or its ester-forming derivatives (acetylates, etc.) according to known methods. It is a polyester resin obtained. When polyethylene terephthalate is contained in the thermoplastic resin composition in the present invention, warpage of the resulting resin molded body is reduced.

  The polyethylene terephthalate may be modified by copolymerizing a small amount of a modifying component that gives a repeating unit other than the terephthaloyl unit and the ethylenedioxy unit within a range not impairing the object of the present invention. The amount of repeating units other than terephthaloyl units and ethylenedioxy units contained in polyethylene terephthalate is preferably less than 30 mol%, more preferably 15 mol% or less, in all repeating units of polyethylene terephthalate.

[Polycarbonate]
Polycarbonate is a solvent method, that is, a reaction of a dihydric phenol and a carbonate precursor (phosgene etc.) or a dihydric phenol and a carbonate precursor in the presence of a known acid acceptor or molecular weight modifier in a solvent such as methylene chloride. It is a compound which can be manufactured by transesterification with a body (diphenyl carbonate etc.). When polycarbonate is contained in the thermoplastic resin composition in the present invention, the fluidity of the thermoplastic resin composition is increased and the moldability is improved.

  Examples of the dihydric phenol used in the production of the polycarbonate include bisphenols, and more specifically, 2,2-bis (4-hydroxyphenyl) propane, that is, bisphenol A and the like. Moreover, what substituted a part or all of bisphenol A by the other dihydric phenol can also be used. Examples of dihydric phenols other than bisphenol A include hydroquinone, 4,4-dihydroxydiphenyl, bis (4-hydroxyphenyl) alkane, bis (4-hydroxyphenyl) cycloalkane, bis (4-hydroxyphenyl) sulfide, bis ( 4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfoxide, compounds such as bis (4-hydroxyphenyl) ether or bis (3,5-dibromo-4-hydroxyphenyl) propane, bis (3,5- And halogenated bisphenols such as dichloro-4-hydroxyphenyl) propane. These dihydric phenols may be dihydric phenol homopolymers or two or more copolymers.

  In the present invention, a thermoplastic random branched polycarbonate obtained by reacting a polyfunctional aromatic compound with a dihydric phenol and / or a carbonate precursor can also be used. In addition, the thermoplastic resin composition in this invention may contain multiple types of polycarbonate.

  The type and content of the polycarbonate in the thermoplastic resin composition are not particularly limited, and are appropriately determined according to the type of the polycarbonate and the content of a brominated acrylic flame retardant described later.

  For example, the mass ratio of polybutylene terephthalate and polyethylene terephthalate and / or polycarbonate in the thermoplastic resin composition may be adjusted to 2/1 to 4/1. When polybutylene terephthalate and polyethylene terephthalate and / or polycarbonate are prepared in the above range, good moldability and the like can be imparted to the thermoplastic resin composition while maintaining the properties of polybutylene terephthalate.

  In the thermoplastic resin composition of the present invention, the total content of polyethylene terephthalate and / or polycarbonate may be 30 to 50 parts by mass with respect to 100 parts by mass of polybutylene terephthalate. If the content of polyethylene terephthalate and / or polycarbonate is within the above range, preferred properties of polyethylene terephthalate and / or polycarbonate can be imparted to the resin molded product. A more preferable content is 30 parts by mass or more and 45 parts by mass or less.

[Brominated acrylic flame retardant]
The brominated acrylic flame retardant in the present invention refers to a bromine-containing acrylic resin (for example, brominated polybenzyl (meth) acrylate resin). The thermoplastic resin composition in the present invention includes a brominated acrylic flame retardant as a flame retardant, and includes the above-mentioned polyethylene terephthalate and / or polycarbonate, and glass fiber described later, and thus has flame retardancy. A resin molded body having high load resistance and rigidity as well as good appearance can be obtained.

  As the brominated acrylic flame retardant in the present invention, polypentabromobenzyl acrylate is particularly preferable.

  In the thermoplastic resin composition of the present invention, the content of brominated acrylic flame retardant may be 15 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of polybutylene terephthalate. If content of brominated acrylic flame retardant is in the said range, the preferable property which brominated acrylic flame retardant has can be provided to a resin molding. A more preferable content is 20 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of polybutylene terephthalate.

[Antimony compound]
The antimony compound in the present invention is a flame retardant aid that enhances the effect of the brominated acrylic flame retardant. Antimony compounds that can be used in the present invention include antimony pentoxide, sodium antimonate, and the like.

  In the thermoplastic resin composition of the present invention, the content of the antimony compound may be 5 parts by mass or more and 15 parts by mass or less with respect to 100 parts by mass of polybutylene terephthalate. If the content of the antimony compound is within the above range, preferable properties of the antimony compound can be imparted to the resin molded body. A more preferable content is 5 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of polybutylene terephthalate.

[Glass fiber]
The glass fiber in the present invention gives high load resistance and rigidity to the resin molded body. As glass fiber in this invention, well-known glass fiber can be used preferably.

  The shape of the glass fiber in the present invention is preferably a glass fiber having a flat cross section. In such a case, the major axis / minor axis ratio of the glass fiber in the present invention may be 2 to 4. According to the glass fiber having such a shape, preferable appearance, load resistance and rigidity can be imparted to the obtained resin molding.

  The glass fiber having a flat cross section can give preferable properties to the resin molded body in terms of appearance, load resistance and rigidity, compared with the glass fiber having a circular cross section, but the use of the glass fiber having a flat cross section. Can increase costs. Therefore, it is preferable to use together the glass fiber which has a flat cross section, and the glass fiber which has a circular cross section as a glass fiber in this invention. When using together the glass fiber which has a flat cross section, and the glass fiber which has a circular cross section, 2/1-1/2 may be sufficient as the mass ratio, for example.

  Although the fiber length and fiber diameter of the glass fiber in the present invention are not particularly limited, the fiber length may be 2.0 mm or more and 6.0 mm or less, and the fiber diameter may be 9.0 μm or more and 14.0 μm or less.

  In the thermoplastic resin composition of the present invention, the glass fiber content may be 60 parts by mass or more and 90 parts by mass or less with respect to 100 parts by mass of polybutylene terephthalate. If content of glass fiber is in the said range, the preferable property which glass fiber has can be provided to a resin molding. A more preferable content is 70 to 90 parts by mass with respect to 100 parts by mass of polybutylene terephthalate.

[Elastomer]
The thermoplastic resin composition in the present invention may contain an elastomer. The elastomer that can be used in the present invention is not particularly limited, and general elastomers such as an olefin elastomer, a core-shell elastomer, and a polyester elastomer can be used. Among these, a thermoplastic resin composition containing an olefin elastomer is preferable because it has excellent fluidity and is imparted with good electrical characteristics. The elastomer in the present invention may be a mixture of two or more elastomers.

  The olefin elastomer is a copolymer mainly composed of ethylene and / or propylene. Specific examples of the olefin elastomer include ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-octene copolymer, ethylene-propylene-butene copolymer, ethylene-propylene-diene copolymer, ethylene- Examples thereof include an ethyl acrylate copolymer, an ethylene-vinyl acetate copolymer, and an ethylene-glycidyl methacrylate copolymer.

  The core-shell elastomer has a multilayer structure including a core layer (core portion) and a shell layer that covers at least a part of the surface of the core layer. In the present invention, a general core-shell type elastomer can be used.

  Examples of the polyester elastomer include a hard segment made of a short chain ester, a polyether component having a number average molecular weight of about 200 to 6000 and a soft segment made of a polyester component having a number average molecular weight of about 200 to 10,000. A copolymer is mentioned. Examples of the dicarboxylic acid component constituting the polyester hard segment include terephthalic acid and isophthalic acid. Moreover, as a diol component which comprises a polyester hard segment, C2-C12 aliphatic diol or alicyclic diol etc. are mentioned. On the other hand, the polyether component constituting the soft segment includes poly (alkylene oxide) glycol. Examples of the polyester component constituting the soft segment include aliphatic hydrocarbons having 2 to 12 carbon atoms.

  In the thermoplastic resin composition of the present invention, the elastomer content may be 10 parts by mass or more and 35 parts by mass or less with respect to 100 parts by mass of polybutylene terephthalate. If the content of the elastomer is within the above range, preferred properties of the elastomer can be imparted to the resin molded body. A more preferable content is 10 to 30 parts by mass with respect to 100 parts by mass of polybutylene terephthalate.

[Other ingredients]
The thermoplastic resin composition in the present invention may contain other components in addition to the above components. Examples of other components include a dripping inhibitor (polytetrafluoroethylene), a stabilizer, an antioxidant, a release agent, and a colorant.

[Method for producing thermoplastic resin composition]
The specific aspect of the manufacturing method of the thermoplastic resin composition in this invention is not specifically limited, It can prepare with the well-known equipment and method in preparation of a resin composition. For example, necessary components can be mixed and kneaded using a single or twin screw extruder or other melt kneader to prepare pellets for molding.

<Resin molding>
By using the thermoplastic resin composition in the present invention, a conventionally known molding method (for example, injection molding, extrusion molding, compression molding, blow molding, vacuum molding, foam molding, rotational molding, gas injection molding, etc.). Various resin molded bodies can be molded.

  The resin molding of the present invention has excellent load resistance. The load resistance of the resin molded product can be determined by a value obtained by multiplying the values of tensile strength and tensile elongation (hereinafter also referred to as “tensile strength × tensile elongation”) and a Charpy impact value.

  Specifically, the “tensile strength × tensile elongation” of the resin molded product of the present invention measured according to ISO 527-1 and 2 is 3 MPa or more. In the present invention, “tensile strength” is a value (unit: MPa) measured according to ISO527-1,2. Further, “tensile elongation” is a value (unit:%) measured in accordance with ISO527-1,2. However, in the calculation of “tensile strength × tensile elongation”, the value obtained by dividing the value of tensile elongation measured in accordance with ISO527-1, 2 by 100 (that is, this value is unitless) is “tensile”. Used as the value of “elongation”. Therefore, the unit of “tensile strength × tensile elongation” is “MPa”.

  “Tensile strength × tensile elongation” indicates the total amount of energy required for the resin molded body to be destroyed when a load is applied to the resin molded body. Indicates that it is difficult to break even if it is stepped on.

Moreover, the Charpy impact value of the resin molded body of the present invention at 23 ° C. measured in accordance with ISO 179 / 1eA is 9 kJ / m ² or more. The Charpy impact value indicates the resistance of the resin molded body to an impact applied instantaneously to the resin molded body, and a high value indicates that the resin molded body is not easily broken even if it falls.

  The resin molded body of the present invention has excellent rigidity. The rigidity of the resin molding can be determined by the value of the flexural modulus.

  Specifically, the bending elastic modulus of the resin molding of the present invention measured according to ISO 178 is 8000 MPa or more. Therefore, the resin molded body of the present invention has excellent resistance to galling and can be preferably used for electrical and electronic parts that are frequently inserted and removed.

  The resin molding of the present invention has excellent flame retardancy. Specifically, the flame retardancy of the resin molded product of the present invention measured according to UL94 under the condition of a thickness of 2 mm is V-0 or more.

  The resin molded body of the present invention has an excellent appearance. Specifically, the glossiness measured according to JIS Z8741 is 90 to 110%. Moreover, the curvature of the resin molding of the present invention is also suppressed.

  Moreover, the resin molding of this invention can have the outstanding electrical property. The electrical characteristics of the resin molded body can be judged by the value of the comparative tracking index (CTI). Specifically, it can be expected that evaluation based on CTI obtained in accordance with IEC (International Electrotechnical Commission) 112 3rd edition is high.

As described above, since the resin molded product of the present invention is excellent in load resistance, rigidity, flame retardancy, appearance, and electrical characteristics, there are almost no problems even when used outdoors.

  In the present invention, “used outdoors” means that the resin molded body of the present invention is excellent in weather resistance. “Excellent weather resistance” means excellent heat resistance and the like so that there is no problem even when exposed to the outdoors.

  As a specific preferred application example of the resin molded body of the present invention, there can be mentioned a housing for housing a connector, plug or electrical / electronic component for electrical / electronic component.

  Among the connectors for electric and electronic parts, the resin molded body of the present invention is suitable as a connector that is a constituent part of a solar cell, a constituent part of a breaker, a constituent part of a switch, or a constituent part of an electric vehicle.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these.

<Material>
Polybutylene terephthalate (PBT): manufactured by Wintech Polymer Co., Ltd., intrinsic viscosity is 0.875 dL / g Polyethylene terephthalate (PET): manufactured by Teijin Chemicals Co., Ltd., intrinsic viscosity is 0.70 dL / g Polycarbonate (PC): Teijin “Panlite L-1225W” manufactured by Kasei Corporation
Elastomer (olefin): Ethylene / ethyl acrylate copolymer, Mitsui / DuPont Polychemical Co., Ltd., “Evaflex-EEA”
Elastomer (core-shell type): Core-shell type elastomer with core layer made of acrylic rubber and shell layer made of vinyl polymer (Rohm and Haas Japan, “Paraloid EXL2314”)
Elastomer (Polyester): Polyester polyether block polymer (Toyobo, “Perprene GP200”)
Flame retardant (Br-acrylic): Bromine-containing acrylic resin (corresponding to brominated acrylic flame retardant), manufactured by ICLP Japan, "FR1025"
Flame retardant (Br-epoxy): Bromine-containing epoxy compound, manufactured by ICLP Japan, "F3100"
Flame retardant (Br-imide): Ethylene bis tetrabromophthalimide, Albemarle Japan, “SAYTEX BT-93W”
Antimony compound: antimony trioxide, manufactured by Nippon Seiko Co., Ltd., “PATOX-M”
Glass fiber (circular cross-section): “Glass chopped strand CSF3PE-941” manufactured by Nitto Boseki Co., Ltd.
Glass fiber (flat cross section): manufactured by Nitto Boseki Co., Ltd., “Glass chopped strand CSG 3PL-830S”, major axis / minor axis ratio is 2 Anti-drip agent: polytetrafluoroethylene, manufactured by Asahi Glass Co., Ltd., “Fluon CD-076”

<Manufacture of thermoplastic resin composition>
The above materials are dry blended in the proportions shown in Tables 1 and 2 below (units are parts by mass) and supplied from a hopper to a twin-screw extruder (manufactured by Nippon Steel Works) having a 30 mmφ screw at 260 ° C. And kneaded to obtain a pellet-shaped thermoplastic resin composition.

<Evaluation>
Using the thermoplastic resin compositions of Examples and Comparative Examples, load resistance (tensile strength, tensile elongation, Charpy impact strength), rigidity (flexural strength, flexural modulus), flame retardancy, appearance (surface gloss) Degree and warpage), flow length, and electrical characteristics (tracking resistance) were evaluated by the following methods. The measurement results are shown in Tables 1 and 2.

[Measurement of tensile strength and tensile elongation]
Each thermoplastic resin composition was injection molded at a molding temperature of 250 ° C. and a mold temperature of 80 ° C. to prepare test pieces. About the obtained test piece, based on ISO527-1, 2, the tensile strength and the tensile elongation were measured. Further, a value obtained by multiplying the obtained tensile strength and tensile elongation values (“tensile strength × tensile elongation” in the table) was also determined.

[Measurement of bending strength and flexural modulus]
The obtained pellet-shaped thermoplastic resin composition was injection-molded at a molding temperature of 260 ° C. and a mold temperature of 80 ° C. to prepare a test piece. According to ISO 178, bending strength (TS) and bending elastic modulus ( TE) was measured.

[Evaluation of impact resistance]
Each thermoplastic resin composition was injection molded at a molding temperature of 260 ° C. and a mold temperature of 80 ° C. to produce a Charpy impact test piece, which was evaluated at 23 ° C. in accordance with the evaluation standard defined in ISO 179 / 1eA. did.

[Evaluation of melt viscosity (MV)]
The melt viscosity (MV) of each thermoplastic resin composition was measured at a temperature of 260 ° C. and a shear rate of 1000 s ⁻¹ in accordance with ISO11443.

[Evaluation of flame retardancy]
According to Underwriters Laboratories' UL-94 standard vertical combustion test, test pieces (2mm thickness) produced by injection molding each thermoplastic resin composition at a molding temperature of 250 ° C and a mold temperature of 80 ° C. The flammability was evaluated.

[Evaluation of surface gloss]
Based on JIS Z8741, the glossiness at an incident angle of 60 ° was measured using a portable gloss meter (“HG-246” manufactured by Suga Test Instruments Co., Ltd.).

[Evaluation of warpage]
The flatness of a test piece having a flat plate shape of 120 mm × 120 mm × thickness 2 mm was measured. The flatness of the test piece was measured at 9 points (3 × 3 points in length and width) on the test piece shown in FIG. 1 by using a CNC image measuring machine Quick Vision QVH404 (manufactured by Mitutoyo Corporation).

[Evaluation of flow length]
A molded product was prepared under the following conditions, and the flow length at a thickness of 2 mm was measured.
Evaluation molded product: 2 mm thick x 20 mm wide spiral flow molding machine: “ES3000” manufactured by Nissei Plastic Industry Co., Ltd.
Cylinder temperature: 260 ° C
Mold temperature: 65 ° C
Injection speed: 70mm / sec
Holding pressure: 75 MPa
Holding time: 10 sec

The flow length was evaluated according to the following criteria.
○: Holding pressure of 75 MPa and flow length of 250 mm or more Δ: Holding pressure of 75 MPa and flow length of 150 mm or more and less than 250 mm x: Holding pressure of 75 MPa and flow length of less than 150 mm

[Evaluation of tracking resistance]
Based on the UL746A tracking resistance test, a PLC (Performance Level Classes) grade of comparative tracking index (CTI) was determined for each resin composition.

  As shown in Tables 1 and 2, the thermoplastic resin composition according to the present invention containing a brominated acrylic flame retardant (in the table, “Br-acryl”) is not only provided with flame retardancy but also “tensile” It can be seen that the values of “strength × tensile elongation”, Charpy impact strength, and flexural modulus are high, and high load resistance, impact resistance, and rigidity are imparted. Moreover, it turns out that the thermoplastic resin composition in this invention containing a brominated acrylic flame retardant has a high value of surface glossiness, and the favorable external appearance property is provided.

  As shown in Tables 1 and 2, it can be seen that among the glass fibers, the thermoplastic resin composition containing glass fibers having a flat cross-section in particular has a suppressed warpage and is given good appearance. Further, it is understood that the thermoplastic resin composition containing glass fibers having a flat cross section has high values of “tensile strength × tensile elongation” and Charpy impact strength, and is imparted with good load resistance and impact resistance. .

  As shown in Tables 1 and 2, it can be seen that among the elastomers, the thermoplastic resin composition containing an olefin-based elastomer is more excellent in fluidity than the thermoplastic resin composition containing a core-shell elastomer. Moreover, the thermoplastic resin composition containing an olefin-based elastomer has a good tracking resistance evaluation result, and it can be seen that good electrical characteristics are imparted.

Claims (8)

Polybutylene terephthalate,
Polyethylene terephthalate and / or polycarbonate;
A brominated acrylic flame retardant;
An antimony compound,
It is composed of a thermoplastic resin composition containing glass fiber,
A value obtained by multiplying the values of tensile strength and tensile elongation measured in accordance with ISO527-1, 2 is 3 MPa or more,
The Charpy impact value measured at 23 ° C. according to ISO 179 / 1eA is 9 kJ / m ² or more,
The flexural modulus measured according to ISO 178 is 8000 MPa or more,
Flame retardancy measured according to UL94 under the condition of thickness 2mm is V-0 or more,
A resin molded article having a glossiness of 90 to 110% measured according to JIS Z8741 and used outdoors.   The resin molded article according to claim 1, wherein a mass ratio of the polybutylene terephthalate and the polyethylene terephthalate and / or polycarbonate is 2/1 to 4/1.   The resin molded product according to claim 1 or 2, wherein the brominated acrylic flame retardant is polypentabromobenzyl acrylate.   The resin fiber according to any one of claims 1 to 3, wherein the glass fiber has a major axis / minor axis ratio of 2 to 4 and a flat cross section.   The resin molded body according to any one of claims 1 to 4, wherein the thermoplastic resin composition further includes an elastomer.   The resin molding according to claim 5, wherein the elastomer is an olefin-based elastomer.   The resin molded body according to any one of claims 1 to 6, wherein the resin molded body is a housing for housing a connector, a plug, or an electrical / electronic component for an electrical / electronic component.   The resin connector according to claim 7, wherein the connector is a solar cell component, a breaker component, a switch component, or an electric vehicle component.

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