KR100526360B1 - Method of regenerating useless safe-net for construction made from polypropylene fiber - Google Patents

Abstract

The present invention relates to a method for regenerating waste safety nets used in construction sites and discarded in yarn form, and more specifically, to collect the polypropylene fiber waste safety nets used at construction sites and grind them in a grinder to bury cement in waste safety nets. Breaking and separating the foreign matter such as, and then crushing the waste safety net and crushing process for good processing; A first washing step of contacting the waste safety net ground product with a hot water shower device while stirring the treated water at 110 ° C. mixed with a surfactant; A fine cutting process of lifting the first washed object and cutting it into a size of about 5 cm; A second washing step of contacting the fine cut material with the hot water shower device while stirring the treated water at 110 ° C. mixed with the surfactant; A step of lifting and drying the second flush water; A chip manufacturing step of extruding the dried processed material into chips; It is characterized in that it is produced in the form of a yarn through the step; spinning the bobbin by spinning and stretching with a spinner to make the prepared chip in a master batch.

The present invention has the advantage of reducing the cost of more than 3 billion won per year by recycling the discarded safety net in the form of a yarn, and because it can be used as a resource without recovering the used safety net to be embedded in the soil, there is an advantage that can prevent environmental pollution.

Description

Method of regenerating useless safe-net for construction made from polypropylene fiber}

The present invention relates to a method for regenerating a polypropylene fiber waste safety net for constructing a polypropylene fiber waste safety net (hereinafter referred to as "safety net") which is used and discarded at a construction site in the form of a yarn.

Safety nets installed and used at construction sites are specific wastes because they contain various contaminants such as cement, dust, oil, welding dregs and dust, and these specific wastes have to be collected and landfilled.

Therefore, the relevant companies have to deal with waste disposal nets with a disposal cost of 50 ~ 600,000 KRW per 5 ton vehicle for disposal of safety nets that are discarded. Landfilling within the building is a cause of environmental pollution.

In order to solve this problem, the present applicant has developed a method for regenerating the waste safety net to solve the above problems, which not only saves processing costs, but also contributes to industrial development by reusing the discarded safety net as resources to contribute to industrial development. The present invention has been devised to attain the same and at the same time eliminate environmental pollution due to landfilling.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention collects the safety net which is discarded after use, pulverize by crushing and crushing to remove foreign substances such as cement and crushing for easy treatment, and then washed first with treated water mixed with a surfactant, and picked out and finely cut Next, after washing with water with a mixture of chemicals such as a surfactant, and washing with water, the mixture is melt filtered through an extruder, and then extruded with a primary spinning machine having a spinning hole having a thickness of 3 to 4 mm. It is made of a chip, which is drawn while spinning with a fine spinning machine to produce a regenerated yarn having a certain strength.

To this end, the present invention is completed by sequentially performing the following process.

<First Step>

Collect used safety nets that are demolished after being used at construction sites.

<Second Step>

The collected waste safety net is treated with a grinder (1) to break solids such as cement buried in the waste safety net and separated from the waste safety net, and then the waste safety net is crushed and processed to be processed.

<3rd process>

The waste safety net pulverized product is mixed with a conveyor belt (2) in a non-ionic and ionic surfactant (CRARION GSA301, manufactured by Karma Chemical Co., Ltd.) at a rate of 3 to 5 g mixed with 1 liter of water and heated to 110 ° C. Put into the filled primary washing treatment tank (4) to operate the stirrer (4a) and hot water shower device (4b) to force the washing to wash and separate the cement, dust, oil, etc. primarily, and to remove the processed product from the net conveyor Dehydrated and lifted through the belt 4c.

<4th process>

Firstly, the waste safety net treated material is put into the micro cutter 3 through the conveyor belt 5, and is cut and ground to a size of about 5 cm.

<5th process>

The second mill was treated with a non-ionic and ionic surfactant (CRARION GS301, manufactured by Karma Chemical Co., Ltd.) at a rate of 3 to 5 g in 1 L of water and filled with treated water heated to about 110 ° C. 4), the stirrer 4a and the hot water shower device 4b are operated to perform forced washing, and the washed object is lifted while being dehydrated by the mesh conveyor belt 4c.

<6th process>

The washed processed material is lifted with a mesh conveyor belt 4c and dried through a drying apparatus such as an oven 6, and then the dried processed material is transferred to a conveyor belt 5 and put into an extrusion spinning machine 7 to melt-spin. However, after the melt is filtered by installing a multi-stage filtration unit 7a at the extruder of the extruder 7, it is supplied to the primary spinning machine 8 to spin to a thickness of about 3 to 4 mm to make an extrudate. .

<7th process>

The cooled extrudate is dropped into the cooling water tank 9 to be cooled, and then transferred to the conveyor 10 to be cut into a chip cutting machine 11 to make a chip state.

<Eighth Step>

The regenerated chip is made into a spinning master batch and spun with a fine spinning machine 12, and is stretched with a stretching machine 13 to make a regenerated yarn having a strength of about 5 g / denier and wound around a bobbin 14 to produce a product. The present invention regenerates the waste safety net used in the construction site through the same process step by step, when the waste safety net is washed, the surfactant is added to the treated water to be washed, and at the same time, the treated water is heated to 110 ° C. and the agitator 4a and hot water are used. Forced washing for a certain period of time in a washing tank equipped with a shower device (4b) can remove various foreign matters attached to the safety net in a short time.The surfactant is about 3 ~ 5g per liter of water. In addition, the treatment effect can be enhanced by mixing in the range of. In addition, by performing the washing treatment in the first and second stages, the removal of foreign substances can be completely achieved, and the waste safety in which the foreign substances are removed. When the net is melted and extruded, the microfiltration process is carried out through a filtration device that passes through a multi-stage filtration unit prior to the spinning process, thereby preventing the mixing of foreign materials into the molten material. It was possible to obtain an effect that can be obtained, and the filtration net of the filtration unit was multiplexed to 80 mesh and 170 mesh and filtered to perform safe filtration.

The present invention manufactured as described above is a waste safety net collected after being used at the construction site is contaminated with cement, oil, dust, etc., so that the waste safety net which is recognized as a specific waste and should be disposed of in landfill is recycled into yarn form and used again as a yarn. Can achieve the effect.

In particular, the present invention has a strength of 5g / denier of the recycled yarn so that compared to the existing strength of 7.5g / denier of the original yarn can maintain a comparable strength can exhibit a satisfactory function as a recycled yarn.

As a result, it is economical because it can save more than 3 billion won of material costs per year, and because of this, there is no need to bury the discarded safety net in the soil, thereby reducing the processing cost and preventing environmental pollution.

1 is an overall processing system diagram of the present invention.

Figure 2 is an illustration of the grinding device and the primary water washing device of the present invention (ga-ga line portion of Figure 1)

Figure 3 is an exemplary view of the micro-cutting device and the secondary flushing device of the present invention (bar portion of Figure 1)

Figure 4 is an illustration of the extruder and the spinning unit of the present invention

Figure 5 is an illustration of exchanging the lower network in the extrusion filter of the present invention

Figure 6 is an illustration of exchanging the upper network in the extrusion filter of the present invention

7 is a view showing an example of the configuration of a filter net portion of the present invention;

8 is an exploded perspective view of the filter network of the present invention.

<Description of Symbols for Major Parts of Drawings>

 1: grinder 2: conveyor belt

 3: fine cutting machine 3a: sorting machine

 4: washing treatment tank 4a: stirrer 4b: hot water shower device 4c: mesh conveyor belt 4e: heater 4d: screw

 5: Conveyor Belt 6: Oven 7: Extruder 7a: Filtration

 8: primary radiator 9: cooling water tank

10: Conveyor 11: Chip Cutting Machine

11a: chip reservoir 12: microspinning machine

13: drawing machine 14: bobbin

Claims (3)

A pulverization process of collecting and crushing the polypropylene fiber waste safety net used at the construction site and crushing it with a crusher to crush and separate foreign substances such as cement buried in the waste safety net, and then crush the waste safety net; A first washing process in which the waste safety net pulverized product is brought into contact with a hot water shower device while stirring in treated water at 110 ° C. mixed with a surfactant, A fine cutting process of cutting the primary water to about 5 cm in size and a second washing process of contacting and lifting the fine cuttings by contacting the hot water shower device with stirring in treated water at 110 ° C. mixed with a surfactant. , A chip manufacturing process of drying the second flush water and putting the dried material into an extruder for melt extrusion, and filtering the melt extrudates in multiple stages and putting them in a primary spinning machine and extruding them in a line to produce chips; Recycling method of polypropylene fiber construction waste safety net, characterized in that obtained by sequentially performing a step of spinning the prepared chip to the fine spinning master batch spinning with a fine spinning machine. The method of claim 1, wherein the surfactant is mixed and used at a ratio of 3 to 5 g per 1 L of treated water. The method of claim 1, wherein the filtration of the chip manufacturing process is performed by constructing a microfiltration network of 80 mesh and 170 mesh into multiple bodies.