JP2000108190A - Fiber composite molding and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber composite molding formed by a small number of manufacturing manhours at a low cost, by incorporating fundamental physical properties as a fiber composite molding without generating a deformation caused by a temperature change and without problem of peeling or corrosion, and a method for manufacturing it. SOLUTION: The fiber composite molding is an extrusion molding made of a composite material of a polyolefin and reinforcing fibers in such a manner that the fibers adhered with acid modified polyolefin are dispersed in the polyolefin as a matrix. In such a fiber composite molding, fibers RF adhered with the acid modified polyolefin MP are charged in the polyolefin of a molten state, and kneaded to thereby improve an interfacial adhesive force of the fibers RF and the polyolefin. Then, the kneaded molding is extrusion molded to manufacture a product of a predetermined shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber composite molded article comprising a polyolefin and a reinforcing fiber formed by extrusion and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, rain gutters generally used are formed by extruding hard vinyl chloride resin. Since such a gutter can be manufactured in one process by extrusion, the number of manufacturing steps is small and the price is low.

[0003] Such rain gutters are fixed to a building by being connected by a joint or the like. However, if the rain gutter is deformed around the joint or the like due to aging and is damaged or water leaks, There are disadvantages. This is considered to be caused by thermal expansion and contraction due to changes in temperature during the four seasons and day and night due to the large coefficient of linear expansion of the vinyl chloride resin, and the joint space is bent and deformed and damaged.

[0004] As a rain gutter 1 for preventing this deformation, FIG.
As shown in FIG. 5, there is known a structure in which a metal plate 3 having a large number of perforations 2 is used as a core material, and a hard vinyl chloride resin layer 4 is coated on the front and back surfaces thereof (for example, as shown in FIG. 5). JP-A-57-33660).

[0005] However, the rain gutter 1 has a drawback that at the interface between the metal plate 3 and the hard vinyl chloride resin layer 4, separation occurs due to stress concentration due to temperature change or the like and deformation due to heat storage occurs. Also, when the rain gutter is cut, rainwater enters the cut surface. The inside of the metal plate 3
Has a problem of corrosion.

The vinyl chloride resin has good weather resistance, but is a flame-retardant resin and has poor thermal stability. Therefore, rain gutters using a vinyl chloride resin have a problem that it is difficult to incinerate them in disposal. In addition, since the decomposition temperature is lower than the softening temperature, it is difficult to reshape the waste material.

In order to solve such a problem, as shown in FIG. 6, both inner and outer surfaces of a core material layer 5 in which maleic acid-modified polyolefin is fused to continuous reinforcing fibers arranged in the longitudinal direction of a rain gutter. A fiber composite rain gutter 7 having a polyethylene coating layer 6 has been proposed in, for example, JP-A-6-81432.

In the fiber composite rain gutter 7, for example, a glass roving of continuous fiber is impregnated with an acid-modified polyolefin resin to form a core layer 5 in advance, and the core layer 5 is wound. The wound core material layer 5 is formed into a gutter shape by a shaping device, a hollow ear portion is provided, and a coating layer 6 is provided on the surface by high-density polyethylene extruded from a crosshead die. Thus, a fiber composite rain gutter 7 is formed.

In the fiber composite rain gutter 7, since the continuous reinforcing fibers are arranged in the longitudinal direction, the linear expansion coefficient of the rain gutter 7 in the longitudinal direction is reduced, and deformation due to thermal expansion and contraction is improved.
Further, since the resin is a polyolefin resin, the resin has excellent thermal stability and is easily recycled. Further, since it is flammable, incineration is easy.

[0010]

However, the fiber composite rain gutter 7 requires a large number of man-hours in manufacturing because the step of manufacturing the core material layer 5 and the step of forming it into a gutter shape are separate steps. There is a problem that the price increases. Further, there is a problem that the maleic acid-modified polyolefin is expensive.

Accordingly, the present invention has the basic physical properties of a fiber composite molded body such that deformation due to temperature change does not occur and problems such as peeling and corrosion do not occur.
It is an object of the present invention to provide an inexpensive fiber composite molded article and a method for producing the same.

[0012]

Means for Solving the Problems In order to solve the above-mentioned problems, the invention of claim 1 is an extruded product comprising a composite material of a polyolefin and a reinforcing fiber, wherein the reinforcing fiber to which the acid-modified polyolefin is attached is used. A fibrous composite molded product characterized by being dispersed with a polyolefin as a matrix.

[0013] The invention according to claim 2 is the fiber composite molded article according to claim 1, wherein the reinforcing fibers are carbon fibers or glass fibers.

According to a third aspect of the present invention, the fiber composite molded body is a rain gutter.
The fiber composite molded article according to the above.

According to a fourth aspect of the present invention, an interfacial adhesive force between the reinforcing fiber and the polyolefin is improved by adding and kneading the reinforcing fiber to which the acid-modified polyolefin is adhered into the molten polyolefin, and continuously extruding the fiber. This is a method for producing a fiber composite molded product, which is formed into a product having a predetermined shape by molding.

According to a fifth aspect of the present invention, the reinforcing fiber is obtained by immersing a reinforcing fiber roving in an acid-modified polyolefin in a molten state, and the reinforcing fiber roving is continuously immersed in the polyolefin in a molten state. Supply to
The method for producing a fiber composite molded product according to claim 4, wherein the production is performed by kneading.

[0017]

According to the present invention, the acid-modified polyolefin is previously attached to the reinforcing fiber for bonding the polyolefin to the reinforcing fiber. When the reinforcing fibers to which the acid-modified polyolefin is attached are kneaded into a molten resin, the acid-modified polyolefin molecules are likely to be present near the reinforcing fibers. It can be effectively used for bonding with the polymer, and even if the amount of the expensive acid-modified polyolefin used is small, the interfacial adhesion between the polyolefin and the reinforcing fiber can be improved. As a result, the matrix polyolefin and the reinforcing fibers are firmly bonded to each other and the interfacial adhesion is improved, so that the coefficient of linear expansion of the fiber composite molded article is reduced, the deformation due to temperature change is small, and the molded article such as a gutter is formed. In this case, damage is less likely to occur.

Since the resin is a polyolefin resin,
Excellent heat stability and easy to recycle. In addition, since polyolefins are flammable, incineration is easy.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a view for explaining a rain gutter as a fiber composite molded article of this embodiment. In this figure, reference numeral 8 denotes a rain gutter as a fiber composite molded body.
Is formed by extrusion molding of a polyolefin resin. A wall 8 is formed from both sides of a flat bottom wall 8a having a width of about 100 mm.
b, 8b are erected opposite each other. The height of the wall 8b is about 40 mm, and a pair of ear edges as shown in FIG. 6 may be formed at the upper end thereof. The shape of the rain gutter 8 is not particularly limited, and may be any shape. For example, a cut surface in a direction orthogonal to the length direction as shown in FIG. 4 may have a semicircular outer shape.
In addition, the presence or absence and the shape of the ear edge are also free.

The walls forming the rain gutter 8 have a polyolefin resin as a matrix and reinforcing fibers dispersed therein. The reinforcing fiber is charged with the acid-modified polyolefin in a molten state into the polyolefin, whereby the interfacial adhesion between the reinforcing fiber and the polyolefin is improved.

The polyolefin used as the matrix resin is a homopolymer or copolymer of olefins, and includes a homopolymer of α-olefin, a copolymer of α-olefin and diolefin, and the like. α-
Olefin homopolymers and copolymers are ethylene,
Homopolymers such as propylene, butene, hexene, octene, and decene and copolymers containing these as one component. Specifically, homopolymers of polyolefins such as polyethylene and polypropylene, ethylene propylene copolymer, ethylene-butene-1 copolymer, ethylene-4-
Methylpentene-1 copolymer and the like. Also,
Examples of the copolymer of an α-olefin and a diolefin include an ethylene-butadiene copolymer and a propylene-butadiene copolymer.

Examples of propylene include homopolymers of polypropylene alone, ethylene-propylene copolymers, propylene-butadiene copolymers, and similar copolymers.

These homopolymers, copolymers and the like may be a composition in which two or more kinds are combined. The molecular weight of these polyolefins is appropriately selected in consideration of the required performance, moldability, and the like of the obtained fiber composite molded article.

The fibers used as the reinforcing fibers are not particularly limited. Normally, reinforcing fibers used for reinforcing the polyolefin resin are appropriately selected as needed. They are,
For example, inorganic fibers such as glass fiber, carbon fiber, and alumina fiber, and organic fibers such as aramid fiber. Inorganic whiskers can also be used. The reinforcing fibers may be used as a mixture, or may be subjected to another chemical treatment that does not impair the object of the present invention.

According to the present invention, there is an advantage that a material having poor adhesion and fusion to polyolefin can be adhered or fused. For this reason, even when a material having poor adhesion and fusion properties with other materials such as carbon fiber and glass fiber is blended, an excellent reinforcing effect is provided and the coefficient of linear expansion of the molded product is reduced.

The filling amount of the reinforcing fiber is not limited. Normal,
2 to 30% by volume of the total amount of the polyolefin resin is preferred in terms of reducing the thermal stretchability. If it is less than 2% by volume, the effect of reducing the thermal stretchability of the fiber composite molded article is small. In addition, if the content exceeds about 30% by volume, it may be difficult to disperse the polyolefin in the polyolefin.

The diameter of the reinforcing fibers is preferably from 3 to 30 μm in order to reduce the thermal stretchability. In order to effectively reduce the thermal stretchability, it is considered that the fiber diameter is preferably smaller. However, if the fiber diameter is smaller than 3 μm, it is difficult to maintain the long fiber length because the reinforcing fiber breaks during melt kneading and the like. Meanwhile, 3
If it exceeds 0 μm, it is difficult to sufficiently exert the reinforcing effect as a fiber.

The fiber length of the reinforcing fiber is not limited, and may be appropriately selected according to the purpose. Any shape such as roving, chop, and milled fiber can be used as long as it can be put into a kneader. In general, the longer the fiber length, the higher the effect of effectively reducing the thermal stretchability. If the fiber length is too short, the effect of reducing the thermal stretchability and the effect of reinforcing are small. Usually, the length is 0.03 mm or more.

These reinforcing fibers are preliminarily attached with an acid-modified polyolefin. Here, the acid-modified polyolefin refers to a polyolefin having an acid group such as a carboxyl group in a molecule.For example, the polyolefin is graft-modified using a compound having an acid group such as an unsaturated carboxylic acid or a carboxylic anhydride. And those obtained by copolymerizing an olefin monomer and an unsaturated carboxylic acid. By adhering such a carboxylic acid-modified polyolefin to the reinforcing fibers, a good adhesive strength between the reinforcing fibers and the polyolefin resin can be obtained even when the amount of the acid-modified polyolefin used is small.

As the unsaturated acid for acid-modifying the polyolefin, an unsaturated carboxylic acid or an anhydride thereof can be used. For example, unsaturated acids such as maleic acid, fumaric acid, crotonic acid, acrylic acid, methacrylic acid and itaconic acid can be used. Examples of the saturated acid and its anhydride include maleic anhydride and itaconic anhydride. The amount of the acid to be blended is not particularly limited, but generally, the polyolefin resin 100
It is about 0.02 to 2.0 parts by weight based on parts by weight.

The polyolefin which has been acid-modified by grafting can be prepared, for example, by using a catalyst such as a peroxide.
It can be obtained by reacting the above-mentioned unsaturated acid with a polyolefin. Examples of the unsaturated dicarboxylic anhydride used for the graft modification include maleic anhydride, itaconic anhydride, citraconic anhydride and the like. Of these, maleic anhydride is preferred. Examples of the unsaturated carboxylic acid copolymerized with the olefin monomer include acrylic acid and methacrylic acid.

These acid-modified polyolefins are commercially available, for example, as Admer QB550 manufactured by Mitsui Petrochemical.

These acid-modified polyolefins are used by being attached to reinforcing fibers. In this case, the method for attaching the reinforcing fibers to the reinforcing fibers is not particularly limited. For example, the roving of the reinforcing fibers can be continuously supplied into the resin impregnation tank to impregnate the molten acid-modified polyolefin. By repeating pressing in the tank, the molten resin can be adhered to the inside of the roving, that is, between the reinforcing fibers without unevenness. The obtained resin-impregnated roving is squeezed in order to remove unnecessary resin, and the amount of adhesion is adjusted.

Next, the reinforcing fibers to which the acid-modified polyolefin is attached are put into a melt of the polyolefin and kneaded. In kneading, the fibers are sufficiently dispersed in a molten resin as a matrix resin while suppressing the breakage of the fibers as much as possible. During this time, the matrix resin and the acid-modified polyolefin have an affinity, and the interfacial adhesion between the reinforcing fibers and the matrix resin is improved. As a kneader for that purpose, it is preferable to use a kneader such as a blade type kneader or a roll type kneader.

In order to perform the steps of melting the resin, charging the fibers, kneading, and forming the product by extrusion in one step, it is preferable to use an extruder which is a kind of a roll-type kneader. The fiber and the molten resin may be kneaded using a kneader other than the extruder, and subsequently supplied to the extruder for molding. Alternatively, extrusion molding can be performed after the fiber and the resin are formed into a molded body such as a pellet in a separate step.

FIG. 2 shows an example of a molding apparatus 11 for producing the rain gutter 8 as a fiber composite molded article of the present invention.
This molding device 11 is a main biaxial rotary extruder 1
2, extrusion die (die) 13, cooling sizing device 14,
The take-off device 15, the cutting device 16, and the carrier 17 are arranged in a line. The extruder 12 includes a hopper 12a for supplying a polyolefin resin, a barrel portion 12b having a biaxial co-rotating screw inside, and a melt-kneading of the resin by covering the outside with a heater, and a barrel portion 12b.
Fiber supply port 18 connected in a T-shaped arrangement in the middle of
And a vent portion 12c provided in a barrel portion 12b ′ downstream of the port 18.

The port 18 is a hole formed in the barrel portion 12b similar to the vent portion 12c for supplying reinforcing fibers. The reinforcing fibers are supplied from the port 18 to the barrel portion 12b.
The screws are quantitatively drawn into the barrel portion 12b by the rotation of the two screws in b. Further, the port 18 is connected to a reinforcing fiber supply device 19 that attaches an acid-modified polyolefin to the reinforcing fiber and continuously supplies the reinforcing fiber to the port 18.

As shown in FIG. 3, the reinforcing fiber supply device 19 includes a bobbin 20 on which a reinforcing fiber roving RF is wound.
And an immersion tank 21 for storing the acid-modified polyolefin MP in a molten state. A melt of an acid-modified polyolefin is supplied to the immersion tank 21 by a single screw extruder (not shown) or the like. In the immersion tank 21,
Supply roller 2 that receives reinforcing fiber roving RF from bobbin 20 and supplies reinforcing fiber roving RF to immersion tank 21
2, a plurality of pairs of nip rollers 23 (23a, 23b) for promoting adhesion of the acid-modified polyolefin MP to the reinforcing fiber roving RF in the tank, and pulling out the reinforcing fiber roving RF from the immersion tank 21 And a pair of nip rollers 24 (24a, 24b) for adjusting the amount of adhering and supplying the reinforcing fiber roving RF with the acid-modified polyolefin adhering to the port 18.

The reinforcing fiber roving RF supplied from the bobbin 20 is continuously supplied to the immersion tank 21 by the supply roller 22. In the immersion tank 21, the melt of the acid-modified polyolefin MP is uniformly attached to the inside of the reinforcing fiber roving RF by being squeezed between a plurality of pairs of nip rollers 23. The reinforcing fiber roving RF is handled by the nip roller 24, the amount of adhesion thereof is controlled, and is continuously supplied to the fiber supply port 18.

On the other hand, the polyolefin resin is supplied to the hopper 12a together with necessary additives. The resin forms a molten phase while being kneaded in the barrel portion 12b. The molten phase is continuously supplied with the reinforcing fiber roving RF near the port 18. This molten phase is further added to the barrel 1
2b '. When the reinforcing fiber roving RF is kneaded in a molten resin, the roving RF is broken and cut by rotation of the screw, whereby the reinforcing fibers are uniformly dispersed in the resin.

Next, the obtained mixed molten phase is placed in a mold 13
Sent out to The mold 13 receives the mixed molten phase and extrudes a molded product from the mold lip into a gutter shape. The extruded molded product is cooled by the cooling sizing device 14 while being taken off by the take-off device 15, and its size is precisely regulated to the shape of a gutter. Next, it is cut to a certain length by the cutting device 16 and the rain gutter 8 is discharged by the transport device 17.

In the rain gutter 8 thus manufactured, since the reinforcing fibers are continuously extruded using rovings, which are long fibers, the reinforcing fibers are oriented in the longitudinal direction of the rain gutter 8. Further, the adhesion between the polyolefin resin as the matrix resin and the reinforcing fibers is improved by the acid-modified polyolefin. As a result, the matrix polyolefin and the reinforcing fibers are firmly bonded and the interfacial adhesion is improved,
The linear expansion coefficient of the fiber composite molded article is reduced, the deformation due to the temperature change is small, and breakage when molded into a molded article such as a gutter is less likely to occur.

These polyolefins contain an antioxidant, an impact resistance improver, a stabilizer, a coloring agent such as a pigment and a dye, and other fillers (fillers) as usually used as a molding material. Is appropriately selected within a range that does not impair the above, and is added and used as a molding resin.
Further, a flame retardant may be blended.

Examples of the filler include inorganic fillers such as mica, talc, and calcium carbonate, and organic fillers such as wood powder. Examples of the flame retardant include various halogen-based, non-halogen-based, and inorganic flame-retardant materials. Examples of the antioxidant include hindered amine.

[0046]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments. In the following examples, the continuous extrusion apparatus 11 shown in FIGS. 2 and 3 was used. Example 1 A polypropylene resin (Mitsubishi Chemical's Polypropylene EA9) was used as a polyolefin resin, and a carbon fiber roving (reinforcement fiber) was used as a reinforcing fiber. 5% by volume of Toho Rayon's Vesfight HTA-SR) was used. An acid anhydride-modified polyolefin (manufactured by Mitsui Petrochemical, Admer QB550) MP was supplied to the immersion tank 21 by a single screw extruder (not shown).

The carbon fiber roving RF is immersed in the molten anhydride-modified polyolefin MP in the immersion tank 21,
This acid-modified polyolefin MP was handled by the nip roll 24 and attached to the carbon fiber roving RF. The polypropylene resin was put into the hopper 12a, and the gutter was manufactured by using the extrusion molding device 11. This gutter is
The width is about 10 cm and the height is about 4 cm. Comparative Example 1 A rain gutter was produced in the same manner as in Example 1, except that the acid-modified polyolefin was not attached to the carbon fiber roving. Comparative Example 2 PP (Mitsubishi Chemical's Polypropylene EA9) containing 10% by volume of a maleic anhydride-modified polyolefin resin (Mitsui Petrochemical's Admer QB550) as a polyolefin resin.
A gutter was manufactured in the same manner as in Comparative Example 1 except that was used.

The tensile elastic modulus and linear expansion coefficient of the rain gutters obtained in Examples and Comparative Examples were measured and are summarized in Table 1. From Table 1,
The tensile elastic modulus of the rain gutter of Example 1 according to the present invention is 3.0 GP.
a, and the coefficient of linear expansion was as excellent as 2.0 × 10 −5 / ° C. From the comparison with Comparative Examples 1 and 2, it is confirmed that the reinforcing fibers of the examples have an increased interfacial adhesive force with the polyolefin as the matrix resin.

[0049]

[Table 1] As described above, in the present invention, since the reinforcing fibers to which the acid-modified polyolefin is attached are introduced into the molten polyolefin, there is a high probability that the acid-modified polyolefin molecules are present near the reinforcing fibers. As a result, most of the acid-modified polyolefin is effectively used for bonding the reinforcing fiber and the polyolefin, and even if the amount of the expensive acid-modified polyolefin used is small, the interfacial adhesive strength between the polyolefin and the reinforcing fiber is reduced. Can be improved.

Since the resin used is a polyolefin resin, it has excellent heat stability and is easy to recycle. In addition, since polyolefins are flammable, incineration is easy. Further, this fiber composite molded article can be manufactured in one step such as continuous extrusion molding. Therefore, the number of manufacturing steps can be simplified and the cost can be reduced.

[0051]

As described above, according to the first aspect of the present invention, since the reinforcing fibers to which the acid-modified polyolefin is adhered are dispersed with the polyolefin as a matrix, the polyolefin resin as the matrix resin and the reinforcing fibers are used. Thus, a fiber composite molded article having improved adhesion to the fiber is obtained.
In this fiber composite molded article, the matrix polyolefin and the reinforcing fiber are firmly bonded and the interfacial adhesion is improved, so that the coefficient of linear expansion is reduced, the deformation due to temperature change is small, and the molded article such as a gutter is formed. In this case, damage is less likely to occur.

According to the second aspect of the present invention, the fiber composite molded article according to the first aspect can use carbon fiber or glass fiber as the reinforcing fiber.

According to the third aspect of the present invention, the fiber composite molded article according to the first or second aspect can be used as a rain gutter.

According to the fourth aspect of the present invention, since the reinforcing fibers to which the acid-modified polyolefin has been previously adhered are introduced into the molten polyolefin and kneaded, the interfacial adhesion between the reinforcing fibers and the polyolefin is improved. . Since extrusion is performed subsequently, there is a high probability that the acid-modified polyolefin molecules are present near the reinforcing fibers. As a result, most of the acid-modified polyolefin is effectively used for bonding with the reinforcing fiber, and even if the amount of the expensive acid-modified polyolefin used is small, the interfacial adhesion between the polyolefin and the reinforcing fiber is improved. Is provided. Since the method for producing the fiber composite molded article is a single step, the number of production steps can be simplified and the cost can be reduced.

According to a fifth aspect of the present invention, in the production method according to the fourth aspect, a reinforcing fiber roving immersed in a molten acid-modified polyolefin is used as the reinforcing fiber, and the reinforcing fiber roving is melted. Since it is continuously supplied and kneaded in the polyolefin in a state, in addition to the effect according to claim 4, the roving is broken and cut at the same time, and the reinforcing fibers are uniformly dispersed in the resin.
As a result, a fiber composite molded article in which the reinforcing fibers dispersed in the polyolefin matrix are uniformly dispersed is obtained, and the fiber composite molded article is reinforced by a long fiber roving, so that the coefficient of linear expansion is reduced. Deformation due to temperature change is small, and breakage when molded into a molded product such as a gutter is unlikely to occur. In addition, since the method for producing the fiber composite molded article is a single step including the step of attaching the acid-modified polyolefin to the reinforcing fibers, the number of production steps can be simplified and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective sectional view illustrating a rain gutter as a fiber composite molded product according to an embodiment.

FIG. 2 is a process diagram for explaining a forming apparatus for manufacturing a rain gutter according to the embodiment.

FIG. 3 is a schematic sectional view illustrating the reinforcing fiber supply device of FIG.

FIG. 4 is a partially cutaway perspective view illustrating a conventional rain gutter.

FIG. 5 is a sectional view of the rain gutter of FIG. 3;

FIG. 6 is a perspective sectional view illustrating a conventional fiber composite rain gutter.

[Explanation of symbols]

 8 Rain gutter (fiber composite molding) 11 Molding device RF reinforcing fiber MP Acid-modified polyolefin

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B29K 23:00 105: 12 F term (Reference) 4F100 AD11A AD11H AG00A AG00H AK03A AK03H AK07A AK62A AK66A AK70A AK70H AL07A AL07H BA01 DG04A DG04H DH02A EH171 EJ64A EJ64H EJ641 GB07 JA02 JL00 JL04 4F207 AA03 AA03J AA04E AA11E AA12E AA20 AB25 AG09 AH46 KA01 KA17 KF02 KK11

Claims (5)

[Claims] 1. An extruded product comprising a composite material of a polyolefin and a reinforcing fiber, wherein the reinforcing fiber to which an acid-modified polyolefin is adhered is dispersed using a polyolefin as a matrix. 2. The fiber composite molding according to claim 1, wherein the reinforcing fibers are carbon fibers or glass fibers. 3. The fiber composite molding according to claim 1, wherein the fiber composite molding is a rain gutter. 4. An interfacial adhesive force between the reinforcing fiber and the polyolefin is improved by adding and kneading the reinforcing fiber to which the acid-modified polyolefin is adhered into the polyolefin in a molten state, and then performing extrusion molding to a predetermined level. A method for producing a fiber composite molded product, which is a product having a shape. 5. The reinforcing fiber is obtained by immersing a reinforcing fiber roving in an acid-modified polyolefin in a molten state, and the reinforcing fiber roving is continuously supplied and kneaded in the polyolefin in a molten state. The method for producing a fiber composite molded article according to claim 4, wherein