JP3158520B2 - Recycled material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic material used for an automobile bumper and the like, and more particularly to a used S material.
The present invention relates to a recycled material in which a waste material of a thermosetting resin such as an MC material is reused.

[0002]

2. Description of the Related Art Conventionally, plastic parts used for automobile bumpers and the like are often made of thermosetting resin such as SMC (sheet mold compound) material. This SMC material is formed into a sheet by mixing a reinforcing fiber such as glass fiber or a filler into a thermosetting resin, and is excellent in durability, workability, and the like.

[0003]

By the way, in view of global resource problems in recent years, there has been a movement to recycle and reuse used SMC materials. As a general recycling method, a method is considered in which this SMC waste material is finely pulverized and mixed as it is into a matrix of new SMC material.
Due to the limited ratio of waste materials, the amount recycled was limited. Injection molding by mixing this SMC waste material with a thermoplastic resin is also being studied, but it is difficult to uniformly mix the thermoplastic resin with the thermoplastic resin, and there are many segregations, resulting in variations in the characteristics of molded products. was there.

The present invention has been devised in order to effectively solve the above-mentioned problems, and its object is to provide an SMC.
It is possible to increase the amount of the thermosetting resin to be recycled and to provide a recycled material with less segregation.

[0005]

Means for Solving the Problems To accomplish the above object, the periphery of the mother particle made of the thermoplastic resin powder, a fine powder of the daughter particles obtained by pulverizing the waste thermosetting resins deposited was in to form a microcapsule powder, around the microcapsules powder is obtained by forming a composite microcapsules was deposited fine powdery grandchild particles consisting of the thermoplastic resin powder.

[0006] By forming the capsule powder in this way,
Uniform mixing of the thermosetting resin and the thermoplastic resin with less segregation was enabled. In this case, the thermosetting resin as the base particles, it was also thought that a thermoplastic resin as the daughter particles, the result of the experiment, waste material ground powder of the thermosetting resin particle size, intensity, in terms of shape It was found to be unsuitable for mother particles. That is, when the waste material of the thermosetting resin is pulverized, the glass fiber portion becomes a needle shape having a diameter of about 20 μm and a length of about 100 μm, and the remaining resin or filler portion becomes a powder having a particle size of about 10 μm or less. However, the shape of the glass fiber is not suitable for the base particles at the time of encapsulation, and even if it is performed, a thermoplastic resin having a particle size of several μm or less is required as a child particle. Also, the parts such as resin and filler are preferably several tens.
Although it is desired to keep the particle size to about 0 μm, it is very brittle and immediately turns into a powder. In order to use this as a base particle, child particles having a particle size of several μm or less are also required.

On the other hand, thermoplastic resins such as polypropylene which can be considered as child particles are generally available only in a particle size of about 100 μm. Therefore, further attempts have been made to pulverize this, but the limit is to reduce the average particle size to about 20 μm. Although the use of other thermoplastic resins was considered, those having a particle size of several μm or less are generally expensive and have a poor recycling effect.

Therefore, in the present invention, encapsulation is performed by using a thermoplastic resin such as polypropylene as a base particle and SMC as a child particle. Thus, injection molding can be performed only by encapsulation of a thermoplastic resin such as polypropylene and SMC, but it can be seen that injection molding can be more effectively performed by covering the surface of the capsule powder with the thermoplastic resin. Since the capsule powder was discharged, grandchild particles made of a thermoplastic resin such as polypropylene were further attached around the capsule powder.

[0009]

According to the present invention having the above-described structure,
Injection molding of waste materials of thermosetting resin such as SMC
It is possible to effectively mix in the raw materials, and it is possible to increase the amount of recycled thermosetting resin such as SMC waste material, and to obtain a molded product with stable quality .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 1 (A), first, polypropylene is pulverized using a pulverizer, and the particle size is 500 to 100.
Base particles 1 having a particle size of about 0 μm and grandchild particles 2 having a particle size of about 20 μm are formed. Next, similarly, the used SMC waste material is pulverized using a pulverizer to form child particles 3 having an average particle size of about 26 μm. Then, the base particles 1 and the child particles 3 are mixed at a mixing ratio of 70:30, and as shown in FIG. 1 (B), after the child particles 3 are adhered to the surface of the base particles 1,
The child particles 3 are fixed to the mother particles 1 to form microcapsules 4 made of polypropylene and SMC.

Next, as shown in FIG. 1C, the microcapsules 4 and the progeny particles 2 made of polypropylene were blended at a mixing ratio of 90:10, and the progeny particles 2 were formed on the surface of the microcapsules 1. To form a composite microcapsule 5.

FIG. 2A is an enlarged photograph of mother particles 1 made of polypropylene, and FIG. 2B is an enlarged photograph of child particles 3 made of SMC. The mother particles 1 have smooth surfaces, whereas the child particles 3 have needle- like reinforcing fibers such as glass fibers. FIG. 2 (C)
Is a magnified photograph of the microcapsule 4, and it can be seen that the child particles 3 adhere to the surface of the base particle 1. Also, FIG. 2 (D) is obtained by immobilizing process the microcapsules 4, observed that whole are substantially spherical. FIG. 2E is an enlarged photograph of the composite microcapsule 5, and it can be seen that the grandchild particles 2 adhere to the surface of the microcapsule 4. Furthermore, FIG. 2 (F) is obtained by physical processing immobilized composite microcapsule 5 is observed that the whole are substantially spherical.

Thus, SMC waste material becomes polypropylene
It is fixed so that it is wrapped, and the recycled material is completed.

As described above, according to the present invention, the SMC is formed around the base particles 1 made of thermoplastic resin powder such as polypropylene.
The microcapsule powder 4 is formed by adhering the fine powder-like child particles 3 obtained by pulverizing the waste material of the thermosetting resin such as the above, and the above-mentioned thermoplastic resin powder such as polypropylene is formed around the microcapsule powder. to form a composite microcapsule powder 5 obtained by attaching fine powder of a grandchild particles 2 composed
By this, waste materials of thermosetting resin such as SMC can be
And can be effectively mixed into injection molding raw materials.
Thus , the amount of recycled thermosetting resin such as SMC waste can be increased, and a molded product with stable quality can be obtained .

[0016]

In summary, according to the present invention, it is possible to increase the amount of recycled thermosetting resin such as SMC waste material, and to obtain a molded product with stable quality , thereby reducing costs and resources. It has an excellent effect that it can contribute to the reduction of

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2A is a particle structure of a mother particle made of polypropylene.
Which is a microscope photograph showing.

FIG. 2B is a micrograph showing a particle structure of a child particle made of a thermosetting resin such as SMC waste material.

FIG. 2C is a micrograph showing the particle structure of the microcapsule.

FIG. 2D is a micrograph showing the particle structure of a microcapsule that has been immobilized into a powder.

FIG. 2E is a micrograph showing the particle structure of a composite microcapsule.
It is a microscopic photograph.

FIG. 2F is a photomicrograph showing the particle structure of a composite microcapsule that has been immobilized into a powder.

[Explanation of symbols]

 1 mother particle 2 grandchild particle 3 child particle 4 microcapsule powder 5 composite microcapsule powder

Continuation of front page (56) References JP-A-58-209527 (JP, A) JP-A-62-140636 (JP, A) JP-A-64-101374 (JP, A) JP-A-62-83029 (JP) JP-A-63-270744 (JP, A) JP-A-60-19033 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29B 17/00-17/02 B01J 13/02

Claims (1)

(57) [Claims] Around 1. A mother particles made of a thermoplastic resin powder, thereby forming a microcapsule powder by adhering fine powder of the daughter particles obtained by pulverizing the waste of the thermosetting resin, the microcapsules powder A recycled material characterized by being formed from composite microcapsules having fine powder particles of the thermoplastic resin powder adhered to the periphery thereof.