JPH06226740A - Production of fiber composite - Google Patents

Abstract

PURPOSE:To regenerate and reutilize the unnecessary material of a fiber composite and to obtain strength almost the same as that of the fiber composite before regeneration. CONSTITUTION:The ground matter A obtained by grinding a regenerable fiber composite integrally equipped with a core material layer consisting of a glass fiber and a thermoplastic resin and containing 20-60wt.% of a glass fiber, a thermoplastic resin foam layer and a thermoplastic resin skin layer is molded into a regenerated film and this regenerated film is laminated to the single surface of a glass fiber based matlike article. This laminate is compressed under heating and pressure to melt the thermoplastic resin in the regenerated film to be infiltrated in the matlike article and, after pressure is released, the laminate is sucked in its thickness direction under vacuum to obtain a core material B and the core material B is heated. A thermoplastic resin foam having a thermoplastic resin skin is laminated to the core material and the whole is integrally pressed. All of the thermoplastic resins are the same or the same type and the ratio of the ground matter A to the core material B is set to 10-40wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber composite used for automobile interior materials and architectural interior materials.

[0002]

2. Description of the Related Art Generally, a fiber composite is suitable for a ceiling core material for an automobile, because a material which is lightweight and has excellent properties such as rigidity, heat resistance, sound absorption and moldability is required. As a method for producing this fiber composite, the thermoplastic resin is fused in a molten state on both sides of a laminate in which a thermoplastic resin film is laminated on both sides of a mat-like material mainly composed of inorganic fibers, but melted in a non-melted state. Laminate the plate-like bodies that do not adhere to each other, pressurize under pressure in a state where the thermoplastic resin is melted by heating to a temperature equal to or higher than the melting temperature of the thermoplastic resin, decompress the A method is known in which the laminate is pulled in the thickness direction to inflate the laminate by expanding the laminate, and then cooled, and both laminates are peeled off from the laminate to obtain a fiber composite (Japanese Patent Laid-Open No. 2004-242242). (See Japanese Laid-Open Patent Publication No. 64-77664).

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In the above-mentioned fiber composite used for interior materials for automobiles and interior materials for construction, unnecessary portions such as a removed portion by trimming at the time of molding and an ear cut portion at the time of producing the fiber composite are provided. There are many wastes, and of course, there are wastes.

It is an object of the present invention to provide a method for producing a fiber composite which is comparable in strength to the fiber composite before being recycled by recycling the waste material of the fiber composite.

[0005]

According to a first aspect of the present invention, there is provided a method for producing a fiber composite, which comprises a core material layer comprising inorganic fibers and a thermoplastic resin and having an inorganic fiber content of 20 to 60% by weight.
A step of molding a crushed product (A) obtained by crushing a fiber composite material for recycling integrally provided with a thermoplastic resin foam layer and a thermoplastic resin skin layer into a film to obtain a recycled film; A step of laminating the regenerated film on at least one surface of both surfaces of the mat-like material mainly composed of inorganic fibers,
A step of heating and compressing this laminate to melt the thermoplastic resin in the recycled film and impregnating it with a mat-like material;
After that, the pressure is released, and while the impregnated resin is in a molten state, the laminate is pulled in the thickness direction to inflate it to obtain a core material (B), and the obtained core material (B) is heated, A step of laminating the foam side of a laminate formed by laminating a thermoplastic resin skin on a plastic resin foam and pressurizing and integrating the both, and all the thermoplastic resins are the same or similar, The ratio of the ground material (A) to the core material (B) is 10
It is characterized in that it is -40% by weight.

A method for producing a fiber composite according to a second aspect of the present invention comprises a core material layer comprising an inorganic fiber and a thermoplastic resin and having an inorganic fiber content of 20 to 60% by weight; a thermoplastic resin foam layer; A step of molding a crushed product (A) obtained by crushing a fiber composite for recycling integrally provided with a plastic resin skin layer into a film to obtain a recycled film, and heating the obtained recycled film, And a step of laminating the foamed body side of the laminated body in which the thermoplastic resin skin is laminated on the thermoplastic resin foamed body and pressurizing and integrating both to obtain a fiber composite (C). All thermoplastic resins are the same or similar, and the pulverized product (A) for the fiber composite (C)
Is 50 to 95% by weight.

According to a third aspect of the present invention, there is provided a method for producing a fiber composite in which a core layer made of inorganic fibers and a thermoplastic resin and having an inorganic fiber content of 20 to 60% by weight and a thermoplastic resin skin layer are integrally formed. A step of forming a pulverized product (D) obtained by pulverizing the regenerated fiber composite prepared in step 1 to obtain a regenerated film, and a mat-like substance mainly composed of the inorganic fiber of the obtained regenerated film. A step of laminating on at least one side of both sides, a step of heating and compressing this laminate to melt the thermoplastic resin in the recycled film to impregnate it into a mat-like material, and then decompress the impregnated resin While in the molten state, the laminate is pulled in the thickness direction to inflate it to obtain a core material (E), and the obtained core material (E) is heated, and a thermoplastic resin skin is laminated on the core material (E) to form both. And pressure-integrating, and Serial are all thermoplastic resins are the same or syngeneic, in which the ratio of the pulverized material for the core material (E) (D) is characterized in that 10 to 40% by weight. The method for producing a fiber composite according to the invention of claim 4 comprises inorganic fibers and a thermoplastic resin and has an inorganic fiber content of 20.
A pulverized product (D) obtained by pulverizing a fiber composite material for regeneration integrally provided with a core material layer and a thermoplastic resin skin layer of 60% by weight to obtain a regenerated film. And a step of heating the obtained reclaimed film, laminating a thermoplastic resin skin thereon, and pressurizing and integrating both to obtain a fiber composite (F), and all the thermoplastic resins are the same. Alternatively, it is the same system, and the ratio of the ground product (D) to the fiber composite (F) is 50 to 95% by weight.

In the invention of claims 1 to 4, the content of the inorganic fibers in the regenerated fiber composite is 20 to 60% by weight.
If the content is less than 20% by weight, the surface strength of the fiber composite obtained by the method of the present invention becomes insufficient,
If it exceeds 60%, the amount of resin will not be sufficient, so it is necessary to supplement the deficient amount by adding a thermoplastic resin or laminating the thermoplastic resin in the form of a film when forming a film from a pulverized product. Because it will occur. The inorganic fiber content of the recycled film is preferably 20 to 60% by weight,
More preferably, it is 30 to 45% by weight.

Further, in the inventions of claims 1 and 3,
The ratio of the pulverized products (A) and (D) to the core materials (B) and (E) is limited to 10 to 40% by weight. If it exceeds 40% by weight, the amount of new material in the final product of the fiber composite having a predetermined thickness is relatively insufficient, and the desired strength cannot be obtained. Because. In the inventions of claims 2 and 4, the ratio of the pulverized products (A) and (D) to the fiber composites (C) and (F) is limited to 50 to 95% by weight for the same reason as above.

The method of molding the pulverized product (A) into a film is usually an extrusion molding method or a calender molding method, but a powdery or pelletized new thermoplastic resin may be added at the time of molding, if necessary. Good. Further, the amount of resin may be adjusted by laminating a new thermoplastic resin film on the film obtained by molding.

The mat-like material may contain other fibers in addition to the inorganic fibers, but is mainly composed of the inorganic fibers, and its thickness is preferably 5 to 10 mm.

As the inorganic fiber, for example, glass fiber,
Rock wool and the like are mentioned, and the length thereof is preferably 5 to 200 mm from the viewpoint of the moldability of the mat-like material. The thinner the thickness, the lower the mechanical strength, and the thicker it becomes, the more easily it breaks during mat formation. ˜30 μm is preferable, and more preferably 7 to 20 μm.

The method for producing the mat-like material is arbitrary, and examples thereof include a method in which inorganic fibers are supplied to a card machine, defibrated, mixed, and needle punched. The needle punch density is preferably 30 to ²⁰⁰ per cm ² .

In order to bond the inorganic fibers and increase the bulk of the mat-like material, thermoplastic organic fibers such as polyethylene, polypropylene, saturated polyester, polyamide and polyacrylonitrile may be added.

Examples of the thermoplastic resin include polyeletin, polypropylene, saturated polyester, polyamide, vinyl chloride and the like.

The skin of the thermoplastic resin is preferably leather-like, and suitable is one having a polyolefin resin or a polyolefin thermoplastic elastomer as a main component.

Generally, a thermoplastic elastomer exhibits so-called rubber elasticity at room temperature and has a characteristic that it is plasticized at a high temperature and various molding processes are possible, and a thermoplastic polyolefin-based elastomer usually has entropy elasticity in a molecule. Having a rubber component (hard segment, propylene) having a molecular weight and a molecular restraint component (soft segment, ethylene, a small amount of diene) for preventing plastic deformation, obtained by blending these, partially crosslinked structure And unsaturated hydroxy monomers, and those graft-modified with unsaturated carboxylic acid derivatives.

The thermoplastic polyolefin-based elastomer is preferred because it has a high recyclability and does not generate harmful substances when incinerated as compared with the polyvinyl chloride-based elastomer. When the obtained fiber composite is used as an automobile interior material or a building member, the resin is melted by heating, compressed, shaped and cooled to obtain a predetermined component. A cosmetic skin material such as vinyl chloride leather, a non-woven fabric, or a woven fabric may be laminated at the time of molding.

[0019]

The method for producing a fiber composite according to the first to fourth aspects of the present invention has the structure as described above, so that the reinforcing layer can be obtained on the surface of one or both of the fiber composites.
Since the thickness of the fiber composite is predetermined, it is necessary to reduce the amount of new material used by the thickness corresponding to the recycled film, but the presence of the surface reinforcing layer reduces the overall strength of the fiber composite before it is recycled. It is equivalent to the body.

[0020]

First, an embodiment of the present invention will be described.

Example 1 First, a fiber composite for recycling having a glass fiber content of 47.1% by weight was crushed (BO-2572 manufactured by Horai Iron Works Co., Ltd.).
Is crushed to a size of 0.2 to 7 mm to obtain a crushed product (A), which is molded by a press into a film having a thickness of 160 μm, a specific gravity of 1.17 and a weight of 190 g / m ² to obtain a recycled film.

The above fiber composite for recycling is manufactured as follows. That is, a length of 50 mm,
Glass fiber with a diameter of 10 μm, length 50 mm, diameter 10
A polypropylene fiber of μm was supplied to a card machine at a weight ratio of 2: 1, and after being defibrated, needle punching was performed at 100 points per 1 cm ² to obtain a thickness of 6 mm, a width of 1 m, and a length of 1 m.
A mat-like material having an average weight of 600 g / m ² was obtained.

The mat-like material has a thickness of 130 μm on both sides,
A high density polyethylene film having a weight of 125 g / m ² was laminated, and the obtained laminate was sandwiched between two polytetrafluoroethylene films and heated at 200 ° C. for 3 minutes, and then 5 kg by a press heated to 200 ° C. / Cm ² and pressurize it to 0.8 mm, and while keeping the temperature at 200 ° C., vacuum suction the polytetrafluoroethylene film on both sides in the thickness direction, swell the laminate to a thickness of 4 mm, and then cool it. The tetrafluoroethylene film was peeled off from the laminate to obtain a core material.

This core material was heated to 180 ° C., and a layered product (G) was prepared by laminating a polyethylene foam having a thickness of 4 mm with a leather-like polyolefin thermoplastic elastomer skin having a grain pattern having a thickness of 250 μm. A foamed body heated at 80 ° C. was superposed on each other, and both were pressed and integrally molded by a press to obtain a fiber composite.

Next, in the method for producing the core material in the above-mentioned regenerated fiber composite, the average weight of the mat-like material is 410
A fiber composite having a core material (B), a foam and a skin was obtained in the same manner as this method except that g / m ² was used, and a high-density polyethylene film was laminated on both sides and the recycled film was laminated on one side. It was The ratio of the pulverized product (A) to the core material (B) was 22.4% by weight.

Example 2 In Example 1, the thickness of the recycled film was 125 μm,
The same procedure as in Example 1 except that the weight was 145 g / m ² , the weight of the high-density polyethylene film was 80 g / m ² , and the recycled film was laminated on each of the high-density polyethylene films on both sides of the mat-like material. To produce a fiber composite. The ratio of the pulverized product (A) to the core material (B) in this fiber composite was 34.1%.

Comparative Example 1 In Example 2, the weight of the newly formed mat-like material was 300 g / m ^2, and the thickness of the recycled film was 165 μm.
A fiber composite was produced in the same manner as in Example 2 except that m and weight were 195 g / m ² . The ratio of the ground material (A) to the core material (B) in this fiber composite was 45.9% by weight.

Comparative Example 2 The regenerated fiber composite produced in Example 1.

Comparative Example 3 A fiber composite was prepared in the same manner as in Example 1 except that the foam used in the production of the regenerated fiber composite was made of polyurethane (foaming ratio: 40 times). Was manufactured. The ratio of the ground material (A) to the core material (B) in this fiber composite was 22.4% by weight.

Comparative Example 4 A fiber composite was produced in the same manner as in Example 1 except that the knit made of polyester was used as the epidermis used in the production of the regenerated fiber composite. The ratio of the ground material (A) to the core material (B) in this fiber composite was 22.4% by weight.

Next, an embodiment of the invention of claim 2 will be described.

Example 3 First, a regenerated fiber composite having a glass fiber content of 47.1% by weight was pulverized by a pulverizer to a diameter of 0.2 to 7 mm to obtain a pulverized product (A), which was pressed by a press. Thickness 1.87mm, weight 2
A recycled film is obtained by molding into a film of 190 g / m ² .

The regenerated fiber composite was produced in the same manner as in Example 1.

Next, this recycled film was heated to 180 ° C., the laminated body (G) of polyethylene foam used in Example 1 (with a skin) was superposed on it, and both were pressed by a press. The fiber composite (C) was obtained by pressure integral molding. The ratio of the ground product (A) to the fiber composite (C) was 86.2% by weight.

Example 4 First, a regenerated fiber composite having a glass fiber content of 33.3% by weight was pulverized with a pulverizer to a diameter of 0.2 to 7 mm to obtain a pulverized product (A), which was pressed. Thickness 1.87mm, weight 2
A recycled film is obtained by molding into a film of 190 g / m ² .

The regenerated fiber composite is produced as follows. That is, 2-3m in length
m, glass fiber (chopped strand) having a diameter of 10 μm and high-density polyethylene were mixed at a weight ratio of 47:53, kneaded by a kneader, and then pressed to have a thickness of 1.
A core material is obtained by molding into a film of 5 mm and a glass fiber content of 47% by weight, and the core material is heated to 180 ° C.
The foam side of the laminate (G) of the same polyethylene foam as in Example 1 was overlapped and both were pressed and integrally molded by a press to obtain a fiber composite.

Thereafter, a fiber composite (C) was produced in the same manner as in Example 3. The ratio of the ground product (A) to the fiber composite (C) was 86.2%.

Comparative Example 5 A glass fiber (chopped strand) having a length of 2 to 3 mm and a diameter of 10 μm and a high density polyethylene were used in a weight ratio of 33.
3: 66.7, kneading with a kneader, and then pressing with a thickness of 1.5 mm, glass fiber content 33.3
The film was formed into a film having a weight percentage.

A fiber composite was obtained in the same manner as in Comparative Example 4 except that this film was used instead of the recycled film.

Comparative Example 6 A fiber composite was prepared in the same manner as in Example 3 except that the foam used in the production of the regenerated fiber composite was made of polyurethane (foaming ratio: 40 times). Was manufactured. The ratio of the ground product (A) to the fiber composite (C) was 87.1% by weight.

Comparative Example 7 Example 3 was repeated, except that the skin used in the production of the regenerated fiber composite was made of polyester.
A fiber composite was produced in the same manner as in. The ratio of the ground product (A) to the fiber composite (C) was 87.2% by weight.

Next, an embodiment of the invention of claim 3 will be described.

Example 5 First, a regenerated fiber composite having a glass fiber content of 47.1% by weight was pulverized by a pulverizer to a diameter of 0.2 to 7 mm to obtain a pulverized product (D), which was pressed. Thickness 170μm, weight 20
A recycled film is obtained by molding into a film of 0 g / m ² .

The regenerated fiber composite is produced as follows. That is, first, the length is 50m
m, glass fiber having a diameter of 10 μm and polypropylene fiber having a length of 50 mm and a diameter of 10 μm were supplied to the card machine at a weight ratio of 2: 1 and disentangled, and needle punching was performed at 100 points per cm ² to obtain a thickness of 6 mm, Width 1m, length 1
A mat-like material having an average weight of 600 g / m ² was obtained.

A high-density polyethylene film having a thickness of 130 μm and a weight of 125 g / m ² was laminated on both sides of the mat-like material, and the resulting laminate was sandwiched between two polytetrafluoroethylene films and the mixture was placed at 200 ° C. for 3 hours. After heating for a minute,
Pressed at 5 kg / cm ² with a press heated to 200 ° C and compressed to 0.8 mm, and while keeping at 200 ° C, vacuum suction the polytetrafluoroethylene film on both sides in the thickness direction to pull it to a thickness of 4 mm. The laminate was inflated and then cooled, and the polytetrafluoroethylene film was peeled off from the laminate to obtain a core material. This core material is heated to 180 ° C., a leather-like polyolefin thermoplastic elastomer skin having a grain pattern on the surface of 250 μm in thickness is laminated on the core material, and both are pressed and integrally molded by a press to form a fiber composite. That is what I got.

Next, in the method for producing the core material in the above-mentioned regenerated fiber composite, the average weight of the mat-like material is 400
A fiber composite having a core material (E) and a skin was obtained in the same manner as above, except that g / m ^{2 was used} and a high-density polyethylene film was further laminated on both sides and a recycled film was laminated on one side. The ratio of the ground product (D) to the core material (E) was 23.4% by weight.

Example 6 In Example 5, the thickness of the recycled film was 125 μm,
The same procedure as in Example 1 except that the weight was 145 g / m ² , the weight of the high-density polyethylene film was 80 g / m ² , and the recycled film was laminated on each of the high-density polyethylene films on both sides of the mat-like material. To produce a fiber composite. The ratio of the ground material (D) to the core material (E) in this fiber composite was 34.1%.

Comparative Example 8 In Example 6, the weight of the newly formed mat-like material was 300 g / m ^2, and the thickness of the recycled film was 167 μm.
A fiber composite was produced in the same manner as in Example 6 except that m and weight were 195 g / m ² . The ratio of the pulverized product (D) to the core material (E) in this fiber composite was 45.9% by weight.

Comparative Example 9 The regenerated fiber composite produced in Example 5.

Comparative Example 10 A fibrous composite was produced in the same manner as in Example 5, except that the polyester used as the epidermis used in the production of the regenerated fibrous composite was a polyester knit. The ratio of the pulverized product (D) to the core material (E) in this fiber composite was 23.4% by weight.

Next, an embodiment of the invention of claim 4 will be described.

Example 7 First, a regenerated fiber composite having a glass fiber content of 47.1% by weight was pulverized with a pulverizer to a diameter of 0.2 to 7 mm to obtain a pulverized product (D), which was pressed. Thickness 1.87mm, weight 2
A recycled film is obtained by molding into a film of 190 g / m ² .

The above fiber composite for regeneration was produced in the same manner as in Example 5.

Next, this recycled film was heated to 180 ° C., and a leather-like polyolefin thermoplastic elastomer skin having a grain pattern on the surface having a thickness of 250 μm was laminated on the recycled film and both were integrally molded by pressing with a press. A fiber composite (F) was obtained.

The ratio of the ground product (D) to the fiber composite (F) was 90.5%.

Example 8 First, a regenerated fiber composite having a glass fiber content of 43.1% by weight was pulverized by a pulverizer to a diameter of 0.2 to 7 mm to obtain a pulverized product (D), which was pressed. Thickness 2.08mm, weight 2
A recycled film is obtained by molding into a film of 430 g / m ² .

The above regenerated fiber composite is manufactured as follows. That is, 2-3m in length
m, glass fiber (chopped strand) having a diameter of 10 μm and high-density polyethylene were mixed at a weight ratio of 47:53, kneaded by a kneader, and then pressed to have a thickness of 1.
5 mm, weight 2520 g / m ² , glass fiber content 47
A core material is obtained by molding into a film of 10% by weight.
The composite was heated to 0 ° C., the foam side of the laminate (G) of the same polyethylene foam as in Example 1 having a thickness of 4 mm was superposed on the foam, and both were pressed and integrally molded by a press to form a fiber composite (F). Is what I got. The ratio of the ground product (D) to the fiber composite (F) was 87.3%. Thereafter, a fiber composite was manufactured in the same manner as in Example 7.

Comparative Example 11 A glass fiber (chopped strand) having a length of 2 to 3 mm and a diameter of 10 μm and a high density polyethylene were used in a weight ratio of 43.
1: 56.9, kneaded by a kneader, and then pressed by a thickness of 1.5 mm, glass fiber content 33.3
The film was formed into a film having a weight percentage.

A fiber composite was obtained in the same manner as in Comparative Example 8 except that this film was used.

Comparative Example 12 A fiber composite was produced in the same manner as in Example 7 except that the outer skin used in producing the regenerated fiber composite was a polyester knit.

Table 1 shows the results obtained by comparing the above examples and comparative examples with respect to the ease of making recycled films, their appearance, and bending strength.

[0062]

[Table 1]

[0063]

According to the method for producing a fiber composite of the present invention, it is possible to effectively utilize the regenerating fiber composite, and normally, if the regenerating fiber composite is used. Despite the deterioration of strength, the same strength as that of the fiber composite before regeneration is obtained and the appearance is also good.

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Claims (4)

[Claims] 1. A recycled material integrally comprising a core material layer comprising inorganic fibers and a thermoplastic resin and having an inorganic fiber content of 20 to 60% by weight, a thermoplastic resin foam layer and a thermoplastic resin skin layer. Pulverized product (A) obtained by pulverizing a fiber composite for use
A step of forming a reclaimed film by molding into a film, a step of laminating the reclaimed film thus obtained on at least one surface of both surfaces of a mat-like material mainly composed of inorganic fibers, and heating and pressing this laminate. The step of melting the thermoplastic resin in the recycled film and impregnating it into the mat-like material, and then decompressing, while the impregnating resin is in a molten state, the laminate is pulled and expanded in the thickness direction, and the core material (B ) Is obtained, and the obtained core material (B) is heated, and the foamed side of the laminated body in which the thermoplastic resin skin is laminated on the thermoplastic resin foam is laminated and the both are pressed. Including the step of integrating, and all the thermoplastic resins are the same or similar,
The method for producing a fiber composite, wherein the ratio of the pulverized product (A) to the core material (B) is 10 to 40% by weight. 2. A recycled material integrally comprising a core material layer comprising an inorganic fiber and a thermoplastic resin and having an inorganic fiber content of 20 to 60% by weight, a thermoplastic resin foam layer and a thermoplastic resin skin layer. Pulverized product (A) obtained by pulverizing a fiber composite for use
And a step of obtaining a regenerated film by molding into a film, and heating the obtained regenerated film, and laminating the foam side of the laminated body in which the thermoplastic resin skin is laminated on the thermoplastic resin foam. Fiber composite (C) by pressurizing and integrating both
And a step of obtaining all of the above-mentioned thermoplastic resins are the same or similar, and the ratio of the ground product (A) to the fiber composite (C) is 50 to 95% by weight. Body manufacturing method. 3. A regenerated fiber composite comprising an inorganic fiber and a thermoplastic resin, which is integrally provided with a core material layer having an inorganic fiber content of 20 to 60% by weight and a thermoplastic resin skin layer. Forming a pulverized product (D) thus obtained into a film to obtain a regenerated film; laminating the obtained regenerated film on at least one of both surfaces of a mat-like material mainly composed of inorganic fibers; The process of heating and compressing the laminate to melt the thermoplastic resin in the recycled film and impregnating it into the mat-like material, and then decompressing the laminate to the thickness direction while the impregnating resin is in a molten state. And a step of heating the obtained core material (E), laminating a thermoplastic resin skin on the core material (E), and pressurizing and integrating the two, and All of the above thermoplastics are the same or similar The ratio of the pulverized product (D) to the core material (E) is 10 to 40% by weight, and the method for producing a fiber composite. 4. A regenerated fiber composite comprising an inorganic fiber and a thermoplastic resin, which is integrally provided with a core layer having an inorganic fiber content of 20 to 60% by weight and a thermoplastic resin skin layer. A step of molding the pulverized product (D) obtained as described above into a film to obtain a regenerated film, heating the obtained regenerated film, laminating a thermoplastic resin skin on the regenerated film, and pressurizing and integrating both the fibers to form a fiber composite. A step of obtaining the body (F), all the thermoplastic resins are the same or similar, and the ratio of the pulverized product (D) to the fiber composite (F) is 50 to 95% by weight. And a method for producing a fiber composite.