KR101487753B1 - Material of construction with superior tensile strength produced by waste rubber and waste plastic - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to civil engineering and building construction materials having excellent tensile strength and produced by using waste rubber and waste synthetic resin. More particularly, the waste rubber and waste synthetic resin are mixed and mixed at a constant temperature, Characterized in that civil engineering and building construction materials are produced by using a mixed material prepared by stirring a first mixture, an organic additive of polypropylene (PP), and an inorganic additive of glass fiber at a predetermined temperature for a predetermined time, The present invention relates to civil engineering and building construction materials excellent in tensile strength and manufactured using rubber and waste synthetic resin.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction material having excellent tensile strength using waste rubber and waste synthetic resin,

The present invention relates to a method for producing a waste rubber composition which comprises a mixture of a waste rubber and a waste synthetic resin in industrial wastes which are mostly buried or incinerated and cause a lot of troubles and which have tensile strength, The present invention relates to civil engineering and building construction materials having excellent tensile strength and made of waste rubber and waste synthetic resin which are improved in physical properties and applied to the manufacture of water supply and sewage pipes, hume pipes, pipes, pallets, plastic bags, shading plates and shock absorbers.

As the rapid growth of the industry and the industrial structure are advanced, the amount of industrial wastes to be discharged is diversified as well as being subjected to many difficulties.

In the case of landfill, it is difficult to secure a landfill site, conflicts among local residents due to the selection of landfill, groundwater pollution that occurs secondarily, and a concern about the occurrence of diseases, Although it is a convenient method to treat various materials collectively in the case of incineration, it is a convenient method, but it does not solve the problem of exhaust gas such as SOx, NOx, CO, HCl and Dioxin in particulate dust and gas state In the case of waste rubber and polymer wastes generated in the manufacturing process of waste synthetic resin, rubber, shoes, leather, etc., many harmful gas, dust, and soot were generated, and the treatment was difficult.

In order to solve the problems of conventional industrial waste treatment as described above, much research has been conducted in terms of recycling. In the case of waste rubber, the waste rubber is concentrated on the crushing technology for recycling. In the case of waste synthetic resin, , Gas, and so on.

However, such recycling technology is not easy to commercialize because of the high initial investment cost, and thus the recycling rate of industrial waste is low.

Therefore, it is necessary to develop a technology that can increase the recycling rate of industrial wastes by making it possible to reproduce through existing facilities. By increasing the recycling rate, it is possible to save resources and further improve the environmental pollution .

In addition, although the prior art discloses a technology for a humidifier pipe (a registered trademark 20-0211173) and a pipe (Patent Registration No. 10-0292274) using waste such as waste plastics in the past, physical properties such as tensile strength have been reduced, It is necessary to use civil engineering and construction materials that have physical properties that can be applied practically.

Korea Registered Utility Model 20-0211173 (Registered on November 10, 2000) Korean Registered Patent No. 10-0292274 (Registered Date: March 21, 2001)

In order to solve the above-mentioned problems, the present invention relates to a method of manufacturing a waste rubber and a waste synthetic resin, which are excellent in tensile strength, which can increase the recyclability by improving the tensile strength, flexural strength, The purpose of the invention is to provide civil engineering and building construction materials using mixed materials.

In order to achieve the above object,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to civil engineering and building construction materials made of a mixed material of waste rubber and waste synthetic resin,

80 to 90 wt% of a first mixture formed by mixing 10 to 30 wt% of waste rubber and 70 to 90 wt% of waste synthetic rubber with stirring speed of 40 to 50 rpm at a temperature of 140 to 170 DEG C for 5 to 10 minutes,

5 to 10 wt% of an organic additive of PP (polypropylene)

And 5 to 10 wt% of an inorganic additive of glass fiber is stirred at 150 to 200 DEG C for 2 to 5 minutes. The main technical components of civil engineering and construction materials having excellent tensile strength and manufactured using waste rubber and waste synthetic resin .

As described above, the civil engineering and building construction materials using the mixed material of the waste rubber and the waste synthetic resin having excellent tensile strength according to the present invention are excellent in tensile strength, tensile strength and tensile strength due to the fine powdering of the waste rubber, the composition of the compatibilizer, Bending strength and impact strength, and has an effect of saving resources and environmental problems, in particular, by recycling industrial wastes.

Hereinafter, the technical details of the above-described technical configuration will be described in detail.

The civil engineering and building construction materials of the mixed material of the waste rubber and the waste synthetic resin of the present invention are various, but there are concrete water and sewage pipe, hume pipe, pipe, pallet, plastic bag, shading plate and shock absorber.

First, the structure of the first mixture will be described.

The first mixture is formed by mixing 10 to 30 wt% of waste rubber and 70 to 90 wt% of waste synthetic resin at 140 to 170 DEG C for 5 to 10 minutes at a stirring speed of 40 to 50 rpm.

The waste rubber is a waste having a composition of 40% of rubber, 19% of carbon black, 10% of softening oil, 10% of fiber, 10% of iron core, 5% of vulcanization auxiliary agent, 5% of zinc oxide, A piece of waste tire having a size of 25 to 50 mesh, from which iron core and fibers are removed from a tire, is pulverized at 5 kg / hr in a pulverizer and pulverized at a high speed rotation of 11,000 rpm to be a fine powder having a particle size of 200 to 450 μm.

The particle size of the waste rubber greatly influences the physical properties of civil engineering and construction materials. After the iron core, fiber portion, etc. of the waste tire are removed, the waste rubber is processed into waste rubber powder by a method of crushing at room temperature or freezing.

When the particle size of the waste rubber is less than 200 mu m, there is a problem that the crushing operation is not easy. When the waste rubber exceeds 450 mu m, the tensile strength of the manufactured civil engineering and building materials may be lowered. It is preferable to maintain the particle size of 450 mu m.

The waste rubber is used in an amount of 10 to 30 wt% of the total weight of the first mixture. When the waste rubber is less than 10 wt%, the tensile strength may be lowered. When the waste rubber is more than 30 wt%, the amount of waste synthetic resin is decreased, The waste rubber is preferably used in a range of 10 to 30 wt% with respect to the total weight of the first mixture.

The waste synthetic resin may be a mixture of two or more selected from polypropylene (PP), high density polyethylene (HDPE), low density polyethylene (LDPE), polyvinyl chloride, polystyrene (PS), and acrylonitrile butadiene styrene 5 to 10 wt% of a compatibilizer mixed with EPR and SBS in a weight ratio of 1: 1 and 5 to 10 wt% of red mud were added to 80 to 90 wt% of the mixed waste synthetic resin, and the mixture was blended at 200 DEG C and 550 rpm.

The waste synthetic resin may improve the mechanical properties of the impact resistance and the tensile strength of civil engineering and building construction materials produced by using a compatibilizing agent and an inorganic material together. The specific blending ratio of the mixed waste synthetic resin is 10 to 50 wt% of polypropylene (PP) 10 to 50 wt% of high density polyethylene (HDPE), 10 to 50 wt% of LDPE, 10 to 50 wt% of polyvinyl choloride, 10 to 50 wt% of PS (polystyrene), 10 to 50 wt% of acrylonitrile butadiene styrene To 50 wt%.

The amount of waste synthetic resin used for forming the first mixture is 70 to 90 wt%. When the amount of waste synthetic resin is less than 70 wt%, the impact strength of civil engineering and building construction materials may be lowered. When the amount exceeds 90 wt% The tensile strength may be lowered. Therefore, the waste synthetic resin is preferably used in a range of 70 to 90 wt% of the total weight of the first mixture.

The waste rubber and the waste synthetic resin are mixed at a stirring speed of 40 to 50 rpm at a temperature of 140 to 170 DEG C for 5 to 10 minutes to form a first mixture. Under the conditions of 140 DEG C, 40 rpm and less than 5 minutes, The synthetic resin is not agitated well, and it is meaningless because the agitation is well performed under conditions of 170 DEG C and 50 rpm for more than 10 minutes.

5 to 10 wt% of a compatibilizer in which EPR and SBS are mixed in a weight ratio of 1: 1 and 5 to 10 wt% of red mud is added to 80 to 90 wt% of the waste synthetic resin, The compatibilizing agent can be expected to improve physical properties when mixing EPR and SBS in a weight ratio of 1: 1, rather than using EPR or SBS alone, and the red mud serves to increase the tensile strength And it is preferably used in the range of 5 to 10 wt%.

Next, a description will be given of materials for civil engineering and building construction which are formed by mixing the first mixture and an organic additive of PP (polypropylene) and an inorganic additive of glass fiber.

The civil engineering building material is prepared by mixing 80 to 90 wt% of the first mixture, 5 to 10 wt% of the organic additive of PP (polypropylene) and 5 to 10 wt% of the inorganic additive of the glass fiber at 150 to 200 DEG C for 2 to 5 minutes .

When the amount of the first mixture is less than 80 wt%, the tensile strength of civil engineering and building materials may decrease. When the amount of the first mixture exceeds 90 wt%, the amount of the organic additive is decreased, It is preferable that the first mixture is used in a range of 80 to 90 wt% with respect to the total weight of the civil engineering and building construction material.

When the amount of the organic additive of PP is less than 5 wt%, the bending strength is lowered. If the amount of the organic additive is more than 10 wt%, the PP is more than a certain range and the properties such as tensile strength are lowered. Of the organic additive is preferably used in an amount of 5 to 10 wt%.

When the amount of the inorganic additive is less than 5 wt%, it is difficult to expect an increase in the strength and an increase in the amount of the additive. When the amount of the inorganic additive exceeds 10 wt% The use amount of the first mixture or the organic additive may be reduced to deteriorate the physical properties of civil engineering and building construction materials. Therefore, the inorganic additive of the glass fiber is preferably used in a range of 5 to 10 wt%.

Hereinafter, a specific embodiment of the above-described technical configuration will be described.

<Waste rubber>

30 meshes of waste tires from which iron core and fiber portions have been removed are put into a pulverizer at a rate of 5 kg / hr, and pulverized at a high speed rotation of 11,000 rpm to prepare 400 μm fine powder.

<Waste synthetic resin>

20 wt% of HDPE (high density polyethylene), 20 wt% of LDPE (low density polyethylene), 20 wt% of PVC (polyvinyl chloride), 10 wt% of PS (polystyrene), acrylonitrile butadiene styrene (ABS) 5 wt% of a mixture of EPR 50 wt% and SBS 50 wt% and 10 wt% of red mud are added to 85 wt% of mixed waste synthetic resin mixed at a mixing ratio of 10 wt%, and blended at 200 rpm and 550 rpm.

&Lt; First Mixture >

30 wt% of the waste rubber of Example 1 and 70 wt% of the waste synthetic resin of Example 2 were mixed at 100 rpm for 5 to 10 minutes.

<Material of civil engineering and building construction materials>

10 wt% of PP (polypropylene) and 10 wt% of glass fiber were added to 80 wt% of the first mixture of Example 3, followed by stirring at 150 캜 for 5 minutes.

The following Examples 5 to 10 are examples of the production of civil engineering and building materials. If the materials of Example 4 are used to manufacture them under the conditions shown in Examples 5 to 10, Can be manufactured by a method.

<Palette>

By using the material of Example 4, a conveying conveyor pallet is manufactured by compression molding using a pressure of 220 kg / cm 2 and a heat of 150 ° C.

<Waterworks and Sewerage Administration>

Extruded at a temperature of 150 DEG C and a molten cooling water temperature of 25 DEG C using the material of Example 4 and made into a tubular conduit through a pipe forming device.

<Hump tube>

The Hume tube is manufactured by first preparing a Hume tube frame, then filling the Hume tube frame with the material of Example 4 at a temperature of 150 ° C while being stirred and mixed. Then, natural cooling is performed at room temperature to produce a humidifier tube.

<Pipe>

After extruding and molding the material of Example 4 through an extruder, the formed pipe is cooled with cooling water and then cut to a predetermined length to manufacture a pipe.

<Plastic bag>

Using the inflation molding machine equipped with the uniaxial extruder as the material of Example 4, a film was produced to a thickness of 30 占 퐉 and the film was heat-sealed to manufacture a turret.

<Shading plate>

The material of Example 4 is manufactured by single mold injection molding at 200 占 폚.

<Shock absorber>

The material of Example 4 is manufactured by single mold injection molding at 220 占 폚.

[ Test Example 1 ]

The tensile strengths of the civil engineering and construction materials of Examples 5 to 10 were measured. The specimens were prepared, and the specimens were mounted at 1,000 N load cell at room temperature. The tensile strength was measured by UTM at a constant speed using a grip. Respectively.

The formula for calculating the tensile strength is shown in the following equation (1).

Tb = Pb / t x b ------------------------------------------- ---- (One)

From here,

Tb: tensile strength (Kg _f / ㎟)

Pb: Maximum load (Kg _f )

         t: thickness of specimen (mm)

b: Width of test specimen (mm)

In Examples 5 to 11 The tensile strength  Measurement result object Tensile strength (Kg _f / ㎟) Example 5 2.26 Example 6 2.23 Example 7 2.25 Example 8 2.26 Example 9 1.95 Example 10 2.26 Example 11 2.26

As shown in Table 1, tensile strengths (Kg _f / mm 2) of Examples 5 to 11 were measured using specimens of civil engineering and building materials manufactured using the same material. As a result, it was found that pallet 2.26, water supply and drainage pipes 2.23, Hume pipe 2.25, Pipe 2.26, Plastic bag 1.95, Shield plate 2.26, Shock absorber 2.26, which show some excellent tensile strength in the range of 2.23 to 2.26 though there are some differences depending on the physical properties in the manufacturing process.

The civil engineering and building construction materials according to the present invention are manufactured by recycling industrial wastes, and are highly likely to be industrially applicable because of their high quality as materials due to the environmental improvement effect and recycling of industrial wastes and high physical properties.

Claims (5)

In civil engineering and building construction materials made of mixed material of waste rubber and waste synthetic resin,
The mixed material has a compositional composition of 40 wt% of rubber, 19 wt% of carbon black, 10 wt% of softening oil, 10 wt% of fiber, 10 wt% of iron core, 5 wt% of vulcanization auxiliary agent, 5 wt% of zinc oxide, A waste tire piece of 25 to 50 mesh size, from which iron cores and fibers were removed from the waste tire, was pulverized at a high speed rotation of 11,000 rpm while being fed into a pulverizer at a rate of 5 kg / hr. 30 wt%
Mixed lungs composed of a mixture of two or more selected from polypropylene (PP), high density polyethylene (HDPE), low density polyethylene (LDPE), polyvinyl choloride (PVC), polystyrene (PS), and acrylonitrile butadiene styrene % Of waste synthetic resin blended with 80 ~ 90wt% of synthetic resin and 5 ~ 10wt% of compatibilizing agent mixed with EPR and SBS at a weight ratio of 5 ~ 10wt% and red mud 5 ~ 10wt% at 200 ° C and 550rpm 70 ~ 90wt%
80 to 90 wt% of the first mixture of 100 wt% prepared by mixing at 140 to 170 DEG C at a stirring speed of 40 to 50 rpm for 5 to 10 minutes,
5 to 10 wt% of an organic additive of PP (polypropylene)
And 5 to 10 wt% of an inorganic additive of glass fiber is stirred at 150 to 200 DEG C for 2 to 5 minutes and manufactured by using the mixed material to produce civil engineering and building construction materials. Manufactured civil engineering and building construction materials.
The method according to claim 1,
Civil engineering and construction materials manufactured using mixed materials
Wherein said at least one selected from the group consisting of water pipes, water pipes, pipes, pallets, plastic bags, shield plates, and shock absorbers.
delete delete The method according to claim 1,
10 to 50 wt% of polypropylene (PP), 10 to 50 wt% of HDPE (high density polyethylene), 10 to 50 wt% of LDPE (low density polyethylene), 10 to 50 wt% of PVC (polyvinyl choloride) 10 to 50 wt%, and ABS (acrylonitrile butadiene styrene) 10 to 50 wt%, based on the total weight of the composition.