JP2002172619A - Method for treating scrap of fiber product, fiber product, and chip mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for treating the scraps of a fiber product which obtains regenerated fibers by defibrating the scraps of the fiber product by a scratching fibrillating machine. SOLUTION: The scraps S of the fiber product are scratched and fibrillated by the scratching defibration machine 1 without cutting the scraps into short fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention mainly relates to felt,
The present invention relates to a method for treating scrap of nonwoven fabric or fiber products such as carpets for automobile floor coverings, and a fiber product containing fibers regenerated by the treatment method and a chip mold.

[0002]

2. Description of the Related Art Conventionally, for example, carpets for floor coverings of automobiles are formed in a shape conforming to the shape of the floor of the automobile. Is provided. Conventionally, such carpet scraps have been pulverized to separate fibers and thermoplastic resin fine pieces, and to reuse the thermoplastic resin fine pieces.

[0003]

However, when scraps of fiber products such as carpets are crushed, only short fibers can be obtained. However, staple fibers have almost no recycling value. For example, crushed polyurethane foam scraps are made of urethane. Even if it is mixed with a chip mold formed by binding using a prepolymer, there is almost no reinforcing effect. Therefore, such short fibers are mostly disposed of by disposal such as incineration and landfill.

[0004]

According to the present invention, as a means for solving the above-mentioned conventional problems, a scrap S of textiles is provided.
The present invention provides a method for treating scrap S of a fiber product which is defibrated into a regenerated fiber by defibrating with a scraper-type defibrating machine (1). The scrap S of the fiber product is a scrap S of a carpet provided with a thermoplastic resin layer on the back surface, the scrap S is defibrated by a scraping defibrator (1), and then the recycled fiber and the thermoplastic resin fine pieces are separated. It is desirable to separate them. In order to easily scrap the scrap by scraping, the scrap S is desirably cut and scratched. Further, the present invention provides a fiber product and a chip mold containing the recycled fiber obtained by the above-described scrap processing method, and the fiber product is desirably a nonwoven fabric, felt or carpet.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Scraping type defibration machine used in the present invention
(1) is shown in FIGS. In the defibrating machine (1), the rotating shaft (3) is passed through the cylindrical housing (2),
A large number of circular saw blades (4) are mounted on the rotating shaft (3) at a predetermined interval (usually about 10 mm).
(2) A number of scratching pins (5) are protruded from the inner peripheral wall toward the center. The housing (2) is divided into two parts via a shaft (6), and a hopper (7) is connected to the upper part,
The outlet (8) is connected to the lower part.

For example, a scrap S of a carpet for a car floor is put into the defibrating machine (1) via a hopper (7). The carpet is made of fibers such as polypropylene fiber, polyester fiber, acrylic fiber, polyamide fiber and the like. Is a tufted carpet or a needle carpet,
A backing layer made of a thermoplastic resin such as polyethylene, polypropylene, or polyamide is provided on the back surface.

The scrap S of the carpet is desirably torn or cut into small pieces before being put into the defibrating machine (1).

[0008] Scrap S put into the defibrating machine (1)
Is cut by a circular saw blade (4) of a rotating shaft (3) driven and rotated by a driving source such as a motor (not shown), and is defibrated by being scratched by a scratching pin (5). ), A mixture of the regenerated fiber and the thermoplastic resin fine pieces is taken out. In this case, the above outlet (8)
, A mixture of the regenerated fiber and the thermoplastic resin fine pieces may be suctioned and taken out.

After removal, the regenerated fibers and the thermoplastic resin fines are separated by, for example, sieving or air screening.

The fibers recovered in this manner are fibers having an average length of 10 to 60 mm and exhibit excellent reinforcing effects when added to chip molds, cement molded products, resin molded products, etc. It can be used as a raw material fiber for carpets or the like, or mixed with a raw material fiber.

In the above embodiments, carpets for car floor coverings are targeted. However, in the present invention, other than carpets, for example, felts used for silencers for car floor coverings, non-woven fabrics used for interior materials and the like are also included in the present invention. Be eligible. Further, the recycled fiber obtained by the method of the present invention is a long fiber and has a large reinforcing effect. Therefore, it is mixed with other crushed fiber plastic waste material, crushed wood waste material, and the like, and the mixture is formed using a urethane prepolymer. It is also useful when used in a chip mold formed by binding.

Further, the separated thermoplastic resin fine pieces are reused as they are for molding, as a backing layer, or mixed with polypropylene, polystyrene, or the like for molding. When reused for molding, it is extruded into a strip shape by an extruder, cut into pellets, and the pellets are injection molded, or extruded by an extruder onto a stamping mold and stamped, or The sheet is extruded into a sheet by an extruder, and the sheet is used as it is, or the sheet is formed by press forming, vacuum forming or the like.

[0013]

According to the present invention, the fibrous product is defibrated by being scratched, so that the fiber is not cut into short fibers during defibration but is recovered as long fibers. Therefore, the fibers recovered from the above fiber products can be highly utilized as reinforcing fibers for various molded products or as raw materials for felt, nonwoven fabric, carpet and chip mold.

[Brief description of the drawings]

1 to 3 show one embodiment of the defibrating machine used in the present invention.

FIG. 1 is a perspective view

FIG. 2 is a longitudinal sectional view

FIG. 3 is a side sectional view;

[Explanation of symbols]

 1 Defibrator 2 Housing 3 Rotary axis 4 Circular saw blade 5 Scratch pin S Scrap

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B151 AA40 AB06 AC17 CA20 4D004 AA07 AA12 AA26 CA02 CA04 CB12 4F301 BF31 BF40 4L047 AA12 EA22

Claims (8)

[Claims] 1. A method for treating scraps of textile products, wherein the scraps of textile products are defibrated by a scraper-type defibrating machine to produce regenerated fibers. 2. The scrap of the fiber product is a scrap of a carpet provided with a thermoplastic resin layer on the back surface, the scrap is defibrated by a scraping defibrator, and then the recycled fiber and the thermoplastic resin flakes are separated. 2. A method for treating scrap of a textile product according to claim 1, wherein the scrap is separated. 3. A method for treating scrap of textile products according to claim 1, wherein said scrap is cut by a scraping type defibrating machine and defibrated by scratching to produce recycled fibers. 4. A fiber product containing regenerated fiber obtained by the method according to claim 1. 5. The textile product according to claim 4, wherein said textile product is a nonwoven fabric. 6. The textile product according to claim 4, wherein the textile product is felt. 7. The textile product according to claim 4, wherein the textile product is a carpet. 8. A chip mold containing a recycled fiber obtained by the method according to claim 1.