JP2002036240A - Manufacture of recycled raw material of waste thermoplastic plastics mixture and its using method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture thermoplastic plastics discharged as refuse as a recycled raw material in the form of a mixture when an industrial waste and a general waste are reclaimed and reused and use the recycled raw material for manufacturing a water-permeable block material, a water-permeable pavement material, a lightweight aggregate, a paving stone and the like as civil engineering and building materials. SOLUTION: The waste thermoplastic plastics of various shapes and thickneses are ground, mixed and stirred together and the mixture is further subjected to melting, mixing and kneading at 160-300 deg.C. Then the mixed raw material thus obtained is formed in the shape of a crushed stone and is mixed with an epoxy resin and the like and finally is molded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method of melting, kneading, cooling and solidifying a product obtained by pulverizing, stirring and mixing thermoplastic waste plastics as industrial wastes and general wastes irrespective of shape and type. The purpose is to make a solid material and reuse the waste plastic mixture.

[0002]

2. Description of the Related Art In the prior art, thermoplastic waste plastics have many shapes and types, and in the conventional recycling, they are separated into single resins, crushed, melted and pelletized. However, composites, printed items, colored items, and items with paper cannot be reused and have been incinerated or landfilled as garbage. Alternatively, alternative fuels, crushing, granulating and used as blast furnace reducing materials, etc.
Many waste plastic products were not recycled.

[0003] It is difficult to mix and melt a resin having a high melting point, a resin having a low melting point, a heavy product (solid matter), a light product (a film-like material, styrene foam, etc.) and to solidify it, and it is difficult to use the resin. Due to the mixing of various colors, the product became black or gray when melted, and air bubbles also entered the product and could not be used as a molded product. The present invention aims to provide a method for resource reuse. Another object is to accompany the recycling of recycled products.

[0004]

For example, the main body, cap, and label of a plastic bottle are made of different types of plastics, and those having different melting points and properties constitute one product. In addition, those with aluminum evaporation materials on the back side, which are often found in candy bags, are made of composite products. Such products account for a large proportion of the entire waste plastics, and if they are to be reused, they are time-consuming to sort and difficult to dispose of, and are costly to recycle. Many of them have been incinerated or landfilled as waste. The present invention is to pulverize various thermoplastic waste plastics in any shape and type, pulverize, stir, mix and continuously feed the extruder, so that the temperature can be controlled at several points inside the extruder,
The melting temperature is changed from 160 ° C. to 300 ° C. and the mixture is melted and kneaded. Even before the nozzle, heat is applied while controlling the temperature from 160 ° C to 300 ° C. From the input port of the extruder, pulverized, stirred, and mixed were continuously charged and melted from the one with the lower melting point, and the material with the higher melting point was gradually melted and kneaded while kneading, and then poured directly into the mold from the nozzle and cooled. , Make a lump solid and use it as mixed recycled plastic.

[0005] In order to increase the strength of the solid matter, the pulverized material having a high melting point and a large specific gravity, for example, waste plastic bottles, is made 40% to 50% of the total amount, and the remaining 60% to 50% is made of waste polyethylene, It mixes resins such as polypropylene and waste polystyrene and kneads them well while hot-melting them to create a strong product. Also waste pet, waste polycarbonate,
By adding a lot of high-viscosity materials such as waste acrylic, products with high strength can be made.

[0006] In the case of coloring a solid, melting from the inlet,
It can be colored by adding a coloring agent to the place where it is kneaded.

Since the recycled plastic is made as a solid, there is no need to worry about the color, shape and strength, so that various resin products can be mixed. In addition, the resulting solids and products that were used as raw materials were crushed again,
It can be mixed with another pulverized waste plastic and used as a raw material.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Thermoplastic waste plastics collected as industrial waste and general waste are separated into solids and a film system, and individually ground by a crusher.

[0009] The material pulverized by 0008 is mixed with a substance having a high melting point and a heavy substance (solid) dissolved at 230 ° C to 280 ° C at a mixing ratio of 20 to 50%, and having a low melting point and a light weight, a film. 160 ° C or higher with a system or Styrofoam
A substance dissolved at 180 ° C. is added by 50% to 80%, mixed, stirred, extracted, melted and kneaded by using an extractor, and cooled to form a solid.

[0010] In the step of 0009, a coloring material is put into the molten and kneaded place from the charging port to be colored.

The solid material of the mixed and recycled plastic is crushed into crushed stones to produce crushed recycled plastic waste.

[0012]

Since the present invention is configured as described above, the following effects can be obtained.

According to the present invention, the waste plastic is produced as a mere solid, so that the waste plastic can be used as a raw material regardless of the nature, color and type of the waste plastic. The resulting product is also a lump of waste plastic, so it is not bound by shape, strength, or color.

The product of the present invention can be used as an aggregate or crushed stone as it is on a pavement of a railway track or finely crushed. It is lighter in weight and easier to work with than concrete and stone. A sound absorbing effect can also be expected.

[0015] A lump of solid material of the mixed and recycled plastic is crushed and processed into a crushed stone of 5 to 10 mm to produce a recycled crushed waste plastic. Put recycled waste plastic crushed stone in a mixer, add an epoxy resin-based adhesive containing glass fiber, for example, fine fiber manufactured by Three Fine Co., Ltd., knead it, mix it with a curing agent, put it in a mold, and go through a drying line. Make a permeable block. Instead of a conventional flat plate block, interlocking block, etc., it is lightweight, improves work efficiency, and prevents puddles.

A flat plate made of waste rubber chips can be attached to the block used in 0015 to make a water-permeable interlocking with good walking properties.

An epoxy resin or the like is mixed with crushed mixed waste plastic crushed as a pavement material for a sidewalk, a pavement, or the like to make a pavement having water permeability and a sidewalk without puddles. In ordinary asphalt drainage pavement, the amount of water permeation is about 1100, but when the mixed waste plastic recycled crushed stone is 5 mm to 10 mm and is constructed with fine fiber # 1000, it becomes 1300 to 1450. It also plays a role in infiltrating rainwater into the ground and preventing land subsidence.

The same construction as 0017 is applied to the shoulder of a road, etc., so that natural rainwater and the like can penetrate and prevent the propagation of weeds. It is also used as a lower roadbed material, and is used as a substitute for aggregate in pavement work.

By mixing mixed waste plastic crushed stone with cement and using cement as a binder, a lightweight concrete block can be produced, and a roadbed material or block having high water permeability can be produced.

70% recycled crushed plastic waste
Mixing チ ッ プ 50% with a rubber chip 30% ５０50% and hardening it with an epoxy resin produces a road board with excellent elasticity and excellent walking and water permeability.

This is a processing and utilization method that can be expected to increase the reused products as various kinds of thermoplastic waste plastics are recycled.

[Brief description of the drawings]

FIG. 1 is a block flow diagram of a solid according to the present invention.

FIG. 2 is a block flow diagram of an example of using waste plastic recycled crushed stone according to the present invention.

Claims (3)

[Claims] The waste plastic has various forms and types, and the most discharged thermoplastic resin is finely pulverized, agitated and mixed, and then put into an extruder.
Heat is gradually applied to a temperature of from about 300 ° C. to 300 ° C., and the mixture is kneaded while being melted, poured directly into a mold, and cooled to form a solid mass. 2. A colored solid is prepared by introducing a pigment from the charging port in the state of melting and kneading according to claim 1. 3. A waste plastic mixed solid material produced in claim 1 or 2 is crushed to produce waste plastic crushed stone, which is used as a permeable crushed stone for a pavement, a permeable interlocking, a permeable plate block, a lightweight aggregate, a paving stone, and the like. use.