JPH11279289A - Resin molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lightweight resin molded product good in gloss without forming a coating film on the surface of the molded product, good in appearance properties having a metallic color tone and excellent in rigidity and heat resistance. SOLUTION: This resin molded product has a constitution having >=60% surface reflectance at 20 deg. gloss and manifests a metallic color on the surface of the molded product without any coating film on the surface thereof in the resin molded product containing particles having the metallic color. Furthermore, the resin molded product has >=3 GPa flexural modulus of elasticity, >=120 deg.C defletion temperature under load at 1.86 MPa and <=1.18 specific gravity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded article which is excellent in rigidity and heat resistance, is lightweight, and has a glossy metallic color tone.

In particular, the present invention relates to an automobile engine cover,
Cylinder head cover, timing belt cover, door handle, wheel cap, motorcycle muffler cover,
It can be suitably used as vehicle parts such as food garnish and vent louvers, inner and outer layer covers of home appliances such as lamp reflectors, power tool housings, and cover materials for dish dryers and electromagnetic cookers. The present invention relates to a resin molded product that can be suitably used as a cover.

[0003]

2. Description of the Related Art Metallic color tone is required for engine covers and cylinder head covers of automobiles and inner and outer layer covers of home electric appliances. Metal powders such as aluminum have been conventionally used for molded articles such as polyamide resins. A method (metallic coating) of applying a contained paint is employed. However, this method has a problem in the work environment due to the use of an organic solvent, and further has poor productivity.
There was a problem that the cost was high.

On the other hand, there is a method in which a thermoplastic resin such as a polyamide resin is filled with glossy particles such as metal powder such as aluminum, and mica powder coated with metal, wollastonite powder and glass powder. For example, Japanese Patent Publication No. 57-40181 proposes a resin composition in which aluminum powder is mixed with a synthetic resin such as non-reinforced polyethylene or polyvinyl chloride. However, although a resin molded article made of this resin composition can reduce the cost as compared with the above-mentioned metallic coated molded article, there is a problem that it is inferior in rigidity and heat resistance.

[0005] A molded product obtained by mixing aluminum powder or the like with a resin composition in which mica, glass fiber, or the like is mixed has been proposed. However, although a high rigidity and heat resistance can be obtained, a metallic appearance is still obtained. It is difficult and heavy.

Further, JP-A-9-76272 proposes a resin composition in which conductive particles and piezoelectric particles are mixed in a thermoplastic resin such as polypropylene. Molded articles made of this resin composition have excellent impact resistance, but have a problem of low rigidity and high cost.

[0007]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, and is a resin molded product having a good gloss and a metallic color tone with good appearance without forming a coating film on the surface of the molded product, An object of the present invention is to provide a resin molded product which is excellent in rigidity and heat resistance and is lightweight.

[0008]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention relates to a resin molded product containing particles having a metallic color, wherein the surface reflectance at 20 ° gloss is 60% or more, and the metallic color is expressed on the surface of the molded product. Has no coating film on its surface, and has a flexural modulus of 3 GPa or more and a deflection temperature under load at 1.86 MPa of 120 ° C.
As described above, the gist of the present invention is a resin molded product having a specific gravity of 1.18 or less.

According to the present invention, there is provided a resin molded article containing particles having a metallic color, wherein the surface reflectance at 20 ° gloss is 60% or more, and the metallic color appears on the surface of the molded article. The use of an organic solvent eliminates the need to use an organic solvent, improves the working environment, and enables a low-cost resin molded product with good productivity.

Further, the flexural modulus is not less than 3 GPa and 1.8.
By setting the deflection temperature under load at 6 MPa to be equal to or higher than 120 ° C. and the specific gravity to be equal to or lower than 1.18, a resin molded article having excellent rigidity and heat resistance and light weight can be obtained.

A resin molded product satisfying such required characteristics can be a resin molded product which can be used in a wide range of fields such as an engine cover of an automobile and inner and outer layer covers of home electric appliances.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The resin molded article of the present invention is a resin molded article containing particles having a metallic color,
It is necessary that the surface reflectance in gloss is 60% or more and the metallic color is expressed on the surface of the molded product, and that the surface of the molded product has no coating film.

[0013] That is, instead of a metallic coating for forming a coating film on the surface of a molded article, an unpainted resin molded article in which particles having a metallic color are kneaded and contained in a resin composition constituting the resin molded article. There is a need. If the resin composition does not contain particles having a metallic color and the surface of the molded article is colored by metallic coating, the use of an organic solvent or the like becomes inferior in the working environment, and the productivity is poor, and it cannot be recycled. Therefore, the cost is high.

Further, the surface reflectance at 20 ° gloss of the resin molded product must be 60% or more. If the surface reflectance at 20 ° gloss is lower than 60%, the surface of the molded article loses the glossiness and the appearance is poor.

The resin molded article of the present invention has not only the above-mentioned appearance but also a flexural modulus of 3 GPa or more and 1.86 M
It is necessary that the deflection temperature under load at Pa is 120 ° C. or more and the specific gravity is 1.18 or less. By satisfying such required characteristics, a lightweight resin molded product having excellent rigidity and heat resistance can be obtained.

As the resin composition for forming such a resin molded product, a resin composition in which particles exhibiting a metallic color are mixed with a reinforced polyamide resin in which a layered silicate is uniformly dispersed at a molecular level is preferably used. it can.

The phrase "layered silicate is uniformly dispersed in the polyamide resin at the molecular level" means that when the layered silicate is dispersed in the polyamide resin matrix, each of them maintains an interlayer distance of 20 ° or more on average. Here, the interlayer distance refers to the distance between the centers of gravity of the layered silicates, and the term “uniformly dispersed” means that one of the silicate layers or a multilayer having an average overlap of 5 or less is formed in parallel. Or, in a state where random, or a mixture of parallel and random,
A state in which 0% or more, preferably 70% or more is dispersed without forming a lump. For example, when the swellable fluoromica-based mineral as a layered silicate is uniformly dispersed at the molecular level, when a wide-angle X-ray diffraction measurement is performed on the resin pellet, 1
The peak at 2 to 13 ° disappears. Therefore, the dispersion state of the swellable fluoromica-based mineral can be confirmed by this measurement.

Since the layered silicate is uniformly dispersed at the molecular level in the polyamide resin, the reinforced polyamide resin has good rigidity and heat resistance and is lightweight.
The required characteristics of a flexural modulus of 3 GPa or more and a deflection temperature under load at 1.86 MPa of 120 ° C. or more and a specific gravity of 1.18 or less can be satisfied. The mixing ratio of the layered silicate to the polyamide resin is not particularly limited, but is preferably 0.1 to 10% by weight. When the compounding ratio of the layered silicate is less than 0.1% by weight, the rigidity and the heat resistance are inferior. On the other hand, when the content of the layered silicate is more than 10% by weight, injection molding into a molded article becomes difficult.

Further, a reinforced polyamide resin in which layered silicate is uniformly dispersed at a molecular level can be reinforced in a smaller amount than a reinforced polyamide resin reinforced with glass fiber or carbon fiber, or a reinforced polyamide resin reinforced with talc or the like. , Specific gravity of 1.18 or less can be satisfied.

In order to obtain the reinforced polyamide resin in the present invention, the above-mentioned layered silicate is added to a monomer such as aminocarboxylic acid, lactam or diamine and dicarboxylic acid (including a pair of salts thereof) forming the polyamide resin. A method of polymerizing a monomer in the presence of a predetermined amount,
Alternatively, there is a method in which a layered silicate pretreated with a long-chain quaternary ammonium salt and a polyamide resin are melt-kneaded using a twin-screw extruder.

Examples of the polyamide resin constituting the reinforced polyamide resin include aminocarboxylic acid, lactam or diamine and dicarboxylic acid (including a pair of salts thereof).
Can be obtained by polymerizing or polycondensing.

Preferred examples of such polyamide resins include polycaproamide (nylon 6), polytetramethylene adipamide (nylon 46), polyhexamethylene adipamide (nylon 66), and polyhexamethylene sebacamide. (Nylon 610), polyhexamethylene dodecamide (nylon 612), polyundecamethylene adipamide (nylon 116), polyundecamide (nylon 11), polydodecamide (nylon 12), polybis (4-aminocyclohexyl) methane dodecamide ( Nylon PACM12), polybis (3-methyl-4-aminocyclohexyl) methandodecamide (nylon dimethyl PACM12), polymethaxylylene adipamide (nylon MXD6), polyundecamethylene terephthalamide (nylon 1T), poly undecamethylene hexahydroterephthalic (nylon 11T (H))
Alternatively, there are copolymerized polyamides, mixed polyamides, and the like, and particularly, nylon 6 or a copolymer thereof can be preferably used.

Although the relative viscosity of the polyamide resin is not particularly limited, 96% by weight concentrated sulfuric acid is used as a solvent at a temperature of 2%.
Those having a relative viscosity in the range of 1.5 to 5.0 measured at 5 ° C. and a concentration of 1 g / dl are preferred. When the relative viscosity is less than 1.5, mechanical strength such as bending strength and bending elastic modulus of a molded product is reduced. On the other hand, if the relative viscosity exceeds 5.0, the moldability rapidly decreases, which is not preferable.

Examples of the layered silicate to be incorporated in the reinforced polyamide resin include smectite-based minerals such as montmorillonite, beidellite, saponite, hectorite, sauconite, vermiculite-based minerals such as vermiculite, muscovite, biotite, paragonite, levitrite, swelling. Minerals such as fluorinated mica, brittle mica minerals such as margarite, clintnite, and anandite, dombasite, sudoite, coucheite, clinochlore,
Examples include chlorite-based minerals such as chamosite and nimite, and hydrous inosilicate-based minerals such as sepiolite. Among them, swellable fluoromica-based minerals are particularly preferable in terms of uniform dispersibility in the reinforced polyamide resin. Also,
The swellable fluoromica-based mineral can be suitably used because it does not particularly require a pretreatment with an organic salt such as an ammonium salt or an onium salt of aminocarboxylic acid for expanding the interlayer.

The swellable fluorine mica-based mineral is obtained by substituting the hydroxyl group of mica with fluorine, and its chemical structure is represented by the following formula. α (MF) ・ β (aMgF ₂・ bMg
O) · γSiO ₂ (where, M represents sodium or lithium, alpha, beta,
γ, a and b each represent a coefficient, and 0.1 ≦ α ≦ 2, 2 ≦
β ≦ 3.5, 3 ≦ γ ≦ 4, 0 ≦ a ≦ 1, 0 ≦ b ≦ 1, a
+ B = 1. The method for producing such swellable fluoromica-based minerals includes:
For example, silicon oxide or magnesium oxide is mixed with various fluorides, and the mixture is mixed in an electric furnace or a gas furnace.
There is a so-called melting method of completely melting at a temperature of 0 to 1500 ° C. and growing a fluorine mica-based mineral in a reaction vessel during the cooling process.

There is also a method in which talc is used as a starting material and alkali ions are intercalated into the starting material to obtain a fluoromica-based mineral (Japanese Patent Laid-Open No. 2-149415). In this method, talc is mixed with an alkali silicate or an alkali fluoride, and the talc is mixed in a magnetic crucible at a temperature of 700-1.
By performing a heat treatment at 200 ° C. for a short time, a swellable fluoromica-based mineral can be obtained.

When such a swellable fluoromica mineral is dispersed in a monomer forming a polyamide resin and polymerized, the interlayer of the silicate layer of the fluoromica mineral expands, and the polyamide resin is inserted between the respective layers to form a swellable fluoromica mineral. Since the fluorinated mica mineral can be made into a reinforced polyamide resin dispersed at the molecular level, and even if added in a small amount, it has good uniform dispersibility, the resulting reinforced polyamide resin can be used as a reinforced polyamide resin containing a fibrous reinforcing material. It is lighter than that, and the heat resistance is improved.

The above reinforced polyamide resin may be further blended with a non-reinforced polyamide resin in a proportion of 200 parts by weight or less. Preferred examples of the non-reinforced polyamide resin that can be blended in the reinforced polyamide resin composition include polycaproamide (nylon 6), polytetramethylene adipamide (nylon 46), and polyhexamethylene adipamide (nylon 66) Polyhexamethylene sebacamide (nylon 610), polyhexamethylene dodecamide (nylon 612), polyundecamethylene adipamide (nylon 116), polyundecamide (nylon 11), polydodecamide (nylon 12), polybis (4- (Aminocyclohexyl) methandodecamide, (nylon PACM12), polybis (3-methyl-4-aminocyclohexyl) methandodecamide (nylon dimethyl PACM12), polymethaxylylene adipamide (nylon MXD6), polyundecame Terephthalamide (nylon 11T), polyundecamethylene methylene hexahydroterephthalic (nylon 11T (H))
And copolymerized polyamides and mixed polyamides thereof. Among them, nylon 6, nylon 66, nylon 4
6, Nylon 11, Nylon 12, or a copolymerized polyamide thereof, or a mixed polyamide. Among them, nylon 6, Nylon 66, or a copolymerized polyamide thereof,
Mixed polyamides can be suitably used.

When the non-reinforced polyamide resin of the present invention contains a nucleating agent in a proportion of 1% by weight or less, the crystallinity of the resin composition is improved and the moldability is improved. preferable. Such nucleating agents include talc,
Silica, kaolin, graphite, magnesium oxide,
Examples thereof include aluminum oxide, and talc is particularly preferable.

The particles having a metallic color contained in the resin molded article of the present invention are metal particles having a glossy surface or particles having a glossy metal film formed on the surface.

Examples of the metal particles include particles of aluminum, nickel, tin, copper, iron, gold, silver, platinum and the like, and particles of alloys such as brass and stainless steel using these metals as substrates. Nickel and tin particles are preferred, and aluminum particles are particularly preferred.

The particles having a glossy metal film formed on the surface are particles obtained by adhering a metal film made of the above metal to particles serving as a base material made of a material other than a metal such as resin or glass. is there. The base material is not particularly limited as long as the base material surface has a film made of the above-described metal. Specific examples of the substrate include various glass particles, carbon particles, and various resin particles.
As specific examples of various resins, fluorine resin, epoxy resin, phenol resin, nylon resin, cross-linked acrylic resin, cross-linked polystyrene resin, and the like can be used, and the heat resistance temperature is the temperature at the time of molding the reinforced polyamide resin serving as a matrix. It is necessary to decide in consideration of. If the heat-resistant temperature of the base resin is significantly lower than the temperature at the time of molding the reinforced polyamide resin serving as the matrix, the resin particles to which the metal film is attached are thermally deformed more than necessary when kneading,
In some cases, a molded product exhibiting a desired metallic color cannot be obtained. The method of applying a metal film to the surface of a substrate such as glass particles, carbon particles, and various resin particles is not particularly limited.

Further, when mica particles coated with titanium (hereinafter referred to as “pearl pigments”) are added to metal particles or particles having a glossy metal film formed on the surface, the surface reflectance at 20 ° gloss is reduced. It is more preferable in terms of improvement.

The size of the metal particles or the metal-coated particles is preferably in the range of 10 to 200 μm in average particle size and 0.01 to 0.5 μm in thickness. If the average particle size is less than 10 μm, a metallic feeling will not be exhibited and productivity will be poor. Conversely, the average particle size is 200 μm
If it exceeds 3, the dispersibility becomes poor and the metallic color does not appear. If the thickness is less than 0.01 μm, it is difficult to manufacture, and if the thickness exceeds 0.5 μm, the metallic color tends to decrease.

The mixing ratio of the particles exhibiting a metallic color is not particularly limited.
It is preferable to add 0.1 to 10 parts by weight to 00 parts by weight. If the mixing ratio of the particles exhibiting a metallic color is less than 0.1 parts by weight, the surface reflectance at 20 ° gloss cannot be 60% or more, and the metallic feeling is hardly developed. If the compounding ratio is more than 10 parts by weight, the ratio of the reinforced polyamide resin is too small to obtain a molded article having excellent mechanical strength.

In forming the resin molded article of the present invention, a light stabilizer, a weathering agent, a plasticizer, a lubricant, and the like are added to the resin composition as a material as long as its properties are not significantly impaired.
Additives such as coloring agents, release agents, pigments, flame retardants, and reinforcing agents other than layered silicates may be added, and these are added when the resin composition is melt-kneaded or melt-molded.

As the reinforcing agent, for example, clay, talc,
Calcium carbonate, zinc carbonate, wollastonite, silica,
Alumina, magnesium oxide, calcium silicate, sodium aluminate, sodium aluminosilicate, magnesium silicate, glass balloon, carbon black, hydrotalcite, metal fiber, metal whisker, ceramic whisker, potassium titanate whisker, boron nitride,
Examples include graphite, glass fiber, and carbon fiber.

The resin molded product of the present invention can be formed into a target molded product by a usual molding method.
Although it can be produced by a hot melt molding method such as extrusion molding and blow molding, a method by injection molding is particularly preferable.

As described above, the resin molded article of the present invention is excellent in rigidity and heat resistance, and is lightweight and has a metallic appearance with excellent gloss. Therefore, the automobile engine cover, cylinder head cover, fender, hood , Trunk lid, pillar, roof, bumper and other vehicle parts, clusters, consoles, pillars and other interior parts, and can be suitably used as inner and outer layer covers of household electrical appliances such as lamp reflectors, especially suitable as automobile engine covers Can be used for

[0040]

Next, the present invention will be specifically described based on examples, but the present invention is not limited to only these examples. In addition, the measurement of various physical property values in the following Examples and Comparative Examples was performed by the following methods.

(1) Surface reflectance at 20 ° gloss (%): A flat plate having a width of 50 mm, a length of 90 mm and a thickness of 2 mm was prepared and measured according to the method described in JIS-K7105. MURAKAMI COL
Using a gross meter manufactured by OR LAB, Model No. GM-30, the light speed of specular reflection was measured with a light receiver with the incident angle of the C light source set to 20 °.

(2) Metallic appearance: 50 mm in width, 90 mm in length, from all angles under a fluorescent lamp in the room
The appearance and uniform dispersibility of a 2 mm-thick flat plate were visually observed and measured. Those with a large amount of light reflection and uniformly dispersed were marked with a circle, those with a normal degree of light reflection and dispersion were marked with a triangle, and those with a small amount of light reflection and unevenly dispersed were marked with a cross. did.

(3) Specific gravity: Measured by an underwater displacement method based on the method described in JIS-K7112.

(4) Deflection temperature under load (° C.): ASTM
Load 1.86 MPa according to the method described in D-648.
It measured under the stress of.

(5) Flexural modulus (GPa): ASTM
It measured according to the method of D-790.

Example 1 As a resin component, nanocomposite nylon 6 (M2350, manufactured by Unitika) in which a swellable fluoromica-based mineral as a layered silicate was uniformly dispersed at a molecular level was used. This nanocomposite nylon 6 resin has a relative viscosity of 2.
4, which contains 2% by weight of a swellable fluoromica-based mineral in 100% by weight, and is produced by polymerization.

1 part by weight of aluminum powder (EPC-8E-340, manufactured by Sumitomo Color Co., Ltd.) having an average particle diameter of 50 μm and a thickness of 0.02 μm as particles expressing a metallic color, based on 100 parts by weight of the pellets of the nanocomposite nylon 6. And 0.2 parts by weight of a pearl pigment (Iriodin-100, manufactured by Merck Japan Ltd.) having an average particle diameter of 20 μm and a thickness of 0.3 μm, and an injection molding machine (Toshiba Machine Co., Ltd.) having a cylinder temperature set at 250 ° C. (Model No. IS-100E), mold temperature 80 ° C, injection pressure 100MPa, width 5
A rectangular plate-shaped resin molded product having a thickness of 0 mm, a length of 90 mm, and a thickness of 2 mm was injection-molded.

Table 1 shows the surface reflectance, metallic feeling, flexural modulus, deflection temperature under load and specific gravity of the obtained resin molded product.

[0049]

[Table 1]

Example 2 Nanocomposite nylon 6 (1015C2 manufactured by Ube Industries, Ltd.) in which montmorillonite, a layered silicate, was uniformly dispersed at the molecular level was used as a resin component. This nanocomposite nylon 6 has a relative viscosity of 2.6, contains 2% by weight of montmorillonite of 100% by weight, and is produced by polymerization.

Otherwise, the same as in Example 1,
A resin molded product was produced. Table 1 shows the physical properties of the obtained resin molded product.

Example 3 As a resin component, nanocomposite nylon 66 (manufactured by Showa Denko KK, Systemmer FE20102) in which montmorillonite, a layered silicate, was uniformly dispersed at the molecular level was used. This nanocomposite nylon 66 has a relative viscosity of 2.6, contains 5% by weight of montmorillonite in 100% by weight, and is produced by melt-kneading. Further, the molding resin temperature is set to 280
° C.

Otherwise, in the same manner as in Example 1,
A resin molded product was produced. Table 1 shows the physical properties of the obtained resin molded product.

In the resin molded products obtained in Examples 1 to 3, since the particles having a metallic color were contained in the polyamide resin reinforced with the layered silicate, the surface reflectivity was 60% or more, and a good metallic feeling was obtained. Obtained.

Also, since the main component was a reinforced polyamide resin reinforced with a layered silicate, a resin having good flexural modulus and heat resistance and low specific gravity was obtained. Therefore, these resin molded products can be suitably used as engine covers and cylinder head covers for automobiles.

Comparative Example 1 Glass fiber was used instead of the reinforced polyamide resin reinforced with layered silicate as in Examples 1 to 3 as a resin component.
% Modified polyphenylene oxide resin (Noryl GTX860 manufactured by GE Plastics Japan)
Was used. The molding resin temperature was 280 ° C.

Otherwise, in the same manner as in Example 1,
A resin molded product was produced. Table 1 shows the physical properties of the obtained resin molded product.

Comparative Example 2 Glass fiber was used instead of the reinforced polyamide resin reinforced with the layered silicate as in Examples 1 to 3 as the resin component.
A modified polyphenylene oxide resin (Zylon AG114, manufactured by Asahi Kasei Corporation) in which the weight% was mixed was used. The molding resin temperature was 280 ° C.

Otherwise, in the same manner as in Example 1,
A resin molded product was produced. Table 1 shows the physical properties of the obtained resin molded product.

Comparative Example 3 As a resin component, instead of the reinforced polyamide resin reinforced with the layered silicate as in Examples 1 to 3, a reinforced nylon 6 resin (Unitika) containing 35% by weight of talc having a specific gravity of 2.7 was used. A-3130). The molding resin temperature was set to 250 ° C.

Otherwise, the procedure was the same as in Example 1,
A resin molded product was produced. Table 1 shows the physical properties of the obtained resin molded product.

In Comparative Examples 1 and 2, a modified polyphenylene oxide resin containing glass fiber was used as a reinforcing material instead of a reinforced polyamide resin reinforced with a layered silicate as a resin component for forming a resin molded product. Although the obtained resin molded product was excellent in the deflection temperature under load and the flexural modulus, the surface reflectance was smaller than 60%, and a metallic color tone was not obtained, resulting in poor appearance.

Comparative Example 3 was the same as above because the reinforced polyamide resin reinforced with talc was used instead of the reinforced polyamide resin reinforced with layered silicate as the main component of the resin composition forming the resin molded product. The resin molded product obtained in (1) above could not have a glossy metallic color tone. Further, since the amount of talc used as the reinforcing material was larger than that of the layered silicate, the obtained resin molded product had too large a specific gravity.

[0064]

According to the present invention, there is provided a resin molded article containing particles having a metallic color, wherein the surface reflectance at 20 ° gloss is 60% or more, and the metallic color appears on the surface of the molded article. And, by adopting a configuration that does not have a coating film on the surface of the molded product, a resin molded product having a glossy metallic color tone can be obtained without using an organic solvent, and the working environment is good, Good productivity and low cost resin molded products can be obtained.

The flexural modulus is 3 GPa or more and 1.8.
By setting the deflection temperature under load at 6 MPa to be equal to or higher than 120 ° C. and the specific gravity to be equal to or lower than 1.18, a resin molded article having excellent rigidity and heat resistance and light weight can be obtained.

A resin molded product satisfying such required characteristics can be a resin molded product that can be used in a wide range of fields such as an engine cover of an automobile and inner and outer layer covers of home electric appliances.

Claims (1)

[Claims] 1. A resin molded article containing particles having a metallic color, wherein the surface reflectance at 20 ° gloss is 60% or more and the metallic color is expressed on the surface of the molded article, and the molded article is formed. Having no coating film on the surface of the substrate, and having a flexural modulus of 3 GPa or more and 1.86 MPa.
Deflection temperature under load of 120 ° C. or higher and specific gravity of 1.1
A resin molded product having a particle size of 8 or less.