JP2002370226A - Waste frp crushed powder and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste FRP powder capable of being effectively recycled as a low cost FRP material by allowing a glass fiber to be retained in a state of strands. SOLUTION: A method for manufacturing the waste FRP powder comprises the steps of crushing the waste FRP, and recovering small crushed powder generated in the case of crushing by a sieve of 0.5 to 1.5 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a crushed waste FRP (waste glass fiber reinforced plastic) powder that can be effectively reused as an inexpensive FRP material and a method for producing the same.

[0002]

2. Description of the Related Art FRP (glass fiber reinforced plastic)
Is widely used for bathtubs and hulls, especially FR
P bathtubs are produced in large quantities during the high growth period.
It is expected that a large amount of waste FRP will be generated due to an increase in rebuilding demand and bathroom renovation, and recycling of waste FRP is becoming a problem.

[0003] FRP is generally made of glass fiber and unsaturated polyester resin as main materials and added with calcium carbonate as an extender, and is considered to be difficult to recycle.

Conventionally, as a means of recycling waste FRP,
After crushing, it is considered that the material is finely pulverized and used as a substitute for calcium carbonate as a filler for the FRP material.

[0005]

However, conventionally, waste F
In the case where RP is crushed and then finely crushed, there is a problem that the blade of the fine crusher is immediately worn by glass fibers contained in the waste FRP. In addition, the energy cost for making the powder fine is high. For these reasons, the conventional waste FRP fine powder has a unit price of five times or more that of calcium carbonate, and it has been difficult to commercialize as a substitute for calcium carbonate in terms of cost.

As a glass fiber material of the FRP material, one having a fiber diameter of about 10 μm
Uses strands bundled in the order of 00, but waste FRP
After crushing, the glass fiber strands are processed into a monofilament state by a pulverizer.

Therefore, the fine powder of waste FRP is
When used as a material, if the amount used is increased, FRP
However, there was a problem that the strength of the resin was reduced.

Accordingly, an object of the present invention is to provide a waste FRP powder in which glass fibers remain in a strand state, and which can be effectively reused as a low-cost and inexpensive FRP material.

[0009]

According to the present invention, in order to solve the above-mentioned problems, waste FRP is crushed, and small crushed powder generated during the crushing is sieved by a sieve of 0.5 to 1.5 mm. It is intended to be collected.

When waste FRP is crushed by a crusher, about 40% of small crushed material powder passing through a 0.5 to 1.5 mm sieve is usually generated together with large crushed material due to cracking.

The crushed powder that passes through a sieve of 0.5 to 1.5 mm is generated when so-called cracking of waste FRP. Even if small, the glass fiber remains as a strand and becomes a monofilament. Absent.

Therefore, since the waste FRP crushed powder has glass fibers remaining in a strand state, when mixed with an FRP material as a filler, the product strength is improved as compared with a case where the filler is only calcium carbonate.

Further, crushed material powder is inevitably generated at the time of crushing and can be obtained only by sieving. Therefore, after crushing, the production cost is lower than that of powder crushed by a fine powder machine. It is low and can be provided at low cost.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, waste FRP crushed material powder A according to the present invention
After RP1 is supplied to the single-screw crusher 2 and crushed,
It is supplied to the vibrating sieve 3 having a sieve of 1.5 mm and collected.

The large crushed material B obtained by the vibrating sieving machine 3 may then be appropriately supplied to a fine crusher to be pulverized, or may be returned to the single-shaft crusher 2 to be crushed again.
Table 1 shows the results of producing a FRP using the waste FRP crushed product powder A obtained according to the present invention and conducting a strength test together with a comparative example.

[0016]

[Table 1]

The waste F used in Comparative Examples 1 to 3
The RP fine powder is obtained by crushing waste FRP, further crushing it with a fine crusher, and passing through a 1 mm sieve.

The preparation and strength test of the FRP test pieces of the examples and comparative examples were carried out in accordance with JIS K6911 "General Thermosetting Plastics Testing Method".

[0019]

As described above, the waste FRP according to the present invention
Since the crushed powder has glass fibers remaining in a strand state and can be obtained at low cost, it can be effectively reused as an inexpensive FRP material.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a manufacturing process of a crushed waste FRP powder according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waste FRP 2 Crusher 3 Vibrating sieve

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D067 EE12 EE17 GA20 4F201 AB11 AC04 BA04 BN29 BN32 BP11 BP31 BQ44 4F301 AA25 AD10 BF08 BF12 BF32

Claims (3)

[Claims] 1. A crushed waste FRP powder comprising a crushed waste FRP that passes through a sieve of 0.5 to 1.5 mm. 2. The waste FRP is crushed to a size of 0.5 to 1.5 mm.
A method for producing a waste FRP crushed powder for recovering a crushed material passing through a sieve. 3. An FRP molded article comprising the waste FRP crushed powder according to claim 1.