KR102374371B1 - vertical fall prevention network for environmentally friendly building - Google Patents

Abstract

The present invention relates to a vertical fall prevention net for construction and a manufacturing method thereof. More specifically, in a construction site for an apartment building or the like, the fall prevention net is used to prevent an object from falling through an opening of a veranda or a window frame provided on a wall structure of each household and to promote the safety of construction workers and pedestrians walking around the construction site while facilitating the prevention of a falling accident to workers. When weaving a belt and a safety net of the fall prevention net, the belt and the safety net are woven in a loop type net shape to make more strength against the deformation of a fabric, and, meanwhile, even when the fabric is partially damaged, the damage can be prevented from being delivered to the whole area of the fabric, which can lead to the prevention of an accident, and also, when the fabric is discarded, the fabric can be recycled while having more safety against a fire. Moreover, the belt and the safety net are woven with the same material which is polypropylene (PP), to be able to be melted without being separated, resulting in an advantage of enabling the recycling of polypropylene (PP), and, meanwhile, a flame retarding material is added to the belt to prevent the safety net provided in the opening from malfunctioning due to the combustion of the belt in case of a fire, thereby preventing accidents to the workers and the falling of construction materials.

Description

Vertical fall prevention network for environmentally friendly building

The present invention relates to a vertical fall arrest net for construction, and more particularly, to prevent falling objects from falling by an opening such as a veranda or window frame provided on a wall structure for each household at a construction site such as an apartment building, and to prevent falling objects and work around the construction site. To promote the safety of pedestrians and to facilitate the fall prevention of workers, a safety net is provided in the opening of the structure and the belt is extended on both sides to fix it to the fixture. However, the safety net is a loop type weaving in the form of a net to strengthen the deformation of the fabric, and at the same time prevent safety accidents by preventing it from being transmitted to the entire fabric even if it is partially damaged during use. It relates to a vertical fall arrest net for eco-friendly construction that can be strengthened and a method for manufacturing the same.

In general, vertical fall arrest nets for construction are fabric-type protective nets installed on temporary structures such as gang forms and scaffolding at the construction site. It is installed to prevent leaking, and furthermore, this fall arrest net is used to install around a welding work place, storage/loading place of flammable or combustible materials, etc. for fire prevention at a construction site.

In addition, when constructing a new building such as an apartment building, an opening is provided on each floor to provide a veranda or window frame on the outer surface of the building structure. A safety net is installed on the inner or outer surface of the opening to prevent a problem that causes a safety accident by falling into a fall to prevent a safety accident due to a fall of a worker or a building material.

In addition, when building new construction works, the nails fixed on the periphery of the safety net must be separated and fixed frequently in order to be brought in through the openings for each household at any time. When the safety net is fixed to the circumferential surface of the opening, the tension of the safety net can be maintained by providing a belt that extends to the outside of the safety net and tightening it to add tension to fix the belt to the fixture.

In addition, the safety net fixed to the opening of the building is tightly fixed so that even if the worker accidentally pushes the safety net while working, the tension of the safety net prevents the worker from being bounced off and falling to the outdoors of the building, so that the worker is a risk to safety to reduce the burden.

Safety nets installed for the purpose of preventing safety accidents in openings during new construction of buildings such as apartments are usually woven by jumping warp and weft yarns widely to form a mesh shape, so it is easily deformed by pushing or pulling the fabric. Therefore, it is difficult to maintain the shape of the mesh, and to solve this problem, polyvinyl chloride coating is applied as a separate follow-up process so that the shape of the mesh can be fixed without deformation.

And, due to the polyvinyl chloride used in the coating operation, if heat is applied for recycling, carcinogens are generated, so recycling is impossible, so only disposal by landfill is possible.

In addition, the fabric of the safety net of the conventional fall arrest net is manufactured in the form of a woven fabric, so when it is damaged due to a wound caused by a sharp object, the entire fabric is easily damaged due to the nature of the woven form, making it difficult to exert the proper function of the fall arrest net.

It is a woven type woven by crossing warp and weft yarns, and when a part of the safety net is damaged or cut by applying an impact, it is a tissue that loosens.

Usually, a safety net is positioned on the periphery of the opening, and a fixture is provided on the periphery of the safety net to be fixed to the opening of the structure.

The necessary conditions for such a safety net are that the safety net must not be torn by a fall or falling object of a worker at height, and it must have sufficient elasticity to absorb the impact and flame retardancy to prevent fire in case of fire.

Protective nets for construction installed in conventional construction sites are manufactured using materials made of PVC coated nets, polyethylene fibers, or polypropylene fibers. In this case, the flame retardant composition used is generally to include a flame retardant.

In addition, such a conventional vertical fall arrest net is produced by sewing a band using a mesh forming a mesh woven by a woven (loom) with polyester-based fibers,

Since vertical fall protection nets are woven with wide warp and weft threads to form a mesh, the mesh shape can be easily deformed when pushed or pulled by hand, so it is very difficult to maintain the shape of the mesh. The weft and warp yarns are coated so that the warp yarns do not slide. However, after use, since it is practically impossible to recycle the mesh woven with polyester and PVC coated heterogeneous fibers, there is a problem that it is not regenerated and is disposed of in landfills. There is a problem that waste disposal cost is very high because only landfill is possible due to toxic gas such as gas.

In addition, since the PP (polypropylene) network is coated with PVC, it is thin and stiff, so it is not easy to cry, distort, or bend when bent.

In addition, the vertical fall protection net woven with woven has a problem that it is easily torn by a sharp object, and the torn part is torn more easily, resulting in a very high risk of secondary safety accidents.

Since all of these existing vertical fall protection nets are made of different resins, it is difficult to actually recycle them, so they are landfilled and incinerated.

However, if a fire occurs during the construction of a new building such as an apartment, the fall arrest net containing the flame retardant material can protect the fall arrest net containing the flame retardant material fixed to the opening of the building. The belt fixed to the structure's fixture is woven by combining PVC (vinyl chloride) or PET (polyethylene), so it can be combusted in case of fire. cases will occur.

In addition, the material of the fall arrest net is woven with PP (polypropylene), and the belt that extends to both sides of the fall arrest net is woven by combining PVC (vinyl chloride) or PET (polyethylene). Therefore, it was inconvenient to have to separate the belt from the fall arrest net in order to recycle it.

Therefore, after installing the fall prevention nets provided at the openings for each building during construction of such buildings, even if some fabrics are damaged, it prevents safety accidents in advance and protects the safety nets and belts of the fall prevention nets in case of fire. At the same time, I preferred the fall arrest net that made the belt material the same as the safety net to facilitate recycling.

Korean Patent Application Laid-Open No. 10-2011-0132722 "Rachel knitted fabric protection net for construction"

The present invention is intended to solve the above-mentioned problems in the prior art, and as above, when installing a new construction such as an apartment building, a safety accident is prevented by preventing the thread from unraveling even if some fabrics are damaged after the installation of a fall prevention net provided in the opening for each household At the same time, it is possible to protect the safety net and belt of the vertical fall arrest net in case of fire, and at the same time to make the material of the belt the same as that of the safety net to facilitate recycling, In order to make the safety net and belt of the fall prevention net provided in the

When weaving safety nets and belts, weave in the form of a loop-type net to prevent deformation of the tissue, thereby eliminating the conventional anti-deformation coating process, and at the same time weaving the safety net and belt with the same material, polypropylene (PP), and disposing of it Prevents safety accidents in advance by making both the safety net and the belt of the fall arrest system flame-retardant in case of fire, which enables recycling by melting the same material when melting without separating the safety net and the belt and at the same time adding a flame retardant to the belt of the fall arrest net Invented a vertical fall arrest system for construction.

The present invention for achieving the above object is provided in the opening (2) such as a veranda or window frame on the wall structure (1) for each household during construction work, such as an apartment, and the safety net (11) in the longitudinal direction on both sides of the outside. The polypropylene yarn of the safety net 11 and the belt 12, which extends a plurality of belts 12 and secures the ends by the fasteners 3 of the structure 1, is more In the vertical fall prevention net for eco-friendly construction, characterized in that it comprises,

The safety net 11 uses 800 to 1300 denier of polypropylene (PP) material to supply yarn in the horizontal or vertical direction to weave in the form of a net to form a plurality of loop types to prevent tissue deformation. A plurality of main connecting yarns 100 forming a plurality of ring-shaped rotating rings (R) at regular intervals in the vertical direction are arranged in plurality in the horizontal direction,

A first vertical connecting yarn 200 and a second vertical connecting yarn 210 are provided which wrap a plurality of rotation rings (R) formed in the vertical direction of the main connecting yarn 100 to be crossed in a zigzag on the left and right sides in the vertical direction,

After wrapping the rotating ring (R) of the main connecting yarn 100 on the one side, the first to weave the rotating ring (R) of the main connecting yarn 100 over the one or more main connecting yarns 100 in the horizontal direction. A horizontal connecting yarn 300 and a second horizontal connecting yarn 310 are provided,

The first horizontal connecting yarn 300 and the second horizontal connecting yarn 310 are provided in the form of a net to cross between the main connecting yarns 100 to prevent deformation of the loop-type net structure. it is characterized by

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Therefore, as described above, the present invention is manufactured by connecting a plurality of loops when weaving the safety net of the fall prevention net, so that the safety net is woven into a structure in the form of a net to make the fabric very strong against deformation by pushing or pulling the PVC coating process. The advantage of simplifying the manufacturing process by removing

It has the advantage of preventing safety accidents in advance by preventing the entire fabric from being damaged due to partial damage to the fabric as it is manufactured in a knit shape, and the loop-type net shape prevents tissue deformation due to external force. The advantage of reducing the manufacturing process by eliminating the conventional anti-deformation coating process,

The safety net and belt of the fall arrest system are woven from the same material, polypropylene (PP), and melted without separating the safety net and belt at the time of disposal to enable recycling of polypropylene (PP). In the event of a fire that requires the addition of a safety net, it prevents the safety net provided in the opening due to the burning of the belt from falling and not functioning properly, thereby preventing worker safety accidents and falling of building materials even in case of fire. The material of the safety net and the belt of the prevention net is woven from the same material, polypropylene (PP), so that it can be recycled by melting into the same material when melting without separating the safety net and the belt at the time of disposal.

1 is an exemplary view showing the state of use of the present invention;
Figure 2 is an exemplary view showing an embodiment of the fall arrest net of the present invention
Figure 3 is an exemplary view showing the disassembled state of the fall arrest net of the present invention
Figure 4 is an exemplary view showing the state before installation of the fall arrest net of the present invention
Figure 5 is a front view after installation of the fall arrest net of the present invention
Figure 6 is a plan view after installation of the fall arrest net of the present invention
7 is a conceptual diagram according to an embodiment of the fall arrest system of the present invention
8 is an organizational chart according to an embodiment of the fall arrest system of the present invention
Figure 9 is a surface illustration of the fall arrest net of the present invention taken
10 is an exemplary view of the back side of the fall arrest net of the present invention.

As shown in FIG. 1, the present invention for achieving the above object is provided in an opening (2) such as a veranda or window frame in the wall structure (1) for each household during construction work such as an apartment, and a safety net (11) The polypropylene yarn of the safety net 11 and belt 12, which extends a plurality of belts 12 in the longitudinal direction on both sides of the outside and secures the ends by the fasteners 3 of the structure 1, is used in the spinning process in an eco-friendly flame retardant. In the vertical fall prevention net for eco-friendly construction, characterized in that it further comprises a flame-retardant treatment by
The safety net 11 uses 800 to 1300 denier of polypropylene (PP) material to supply yarn in the horizontal or vertical direction to weave in the form of a net to form a plurality of loop types to prevent tissue deformation. A plurality of main connecting yarns 100 forming a plurality of ring-shaped rotary rings (R) at regular intervals in the vertical direction are arranged in plurality in the horizontal direction,
A first vertical connecting yarn 200 and a second vertical connecting yarn 210 are provided which wrap the rotation rings (R) formed in plurality in the vertical direction of the main connecting yarn 100 to be crossed in a zigzag on the left and right sides in the vertical direction,
After wrapping the rotating ring (R) of the main connecting yarn 100 on the one side, the first to weave the rotating ring (R) of the main connecting yarn 100 over the one or more main connecting yarns 100 in the horizontal direction. A horizontal connecting yarn 300 and a second horizontal connecting yarn 310 are provided,
The first horizontal connecting yarn 300 and the second horizontal connecting yarn 310 are provided in the form of a net to cross between the main connecting yarns 100 to prevent deformation of the loop-type net structure. .

The safety net 11 is made of a raschel knitted fabric in which the plurality of loops are connected by knitting to form a plurality of loops by supplying yarn in the horizontal or vertical direction using 800 to 1300 denier of polypropylene (PP) material, ,

The belt 12 is manufactured in plain weave using 900 ~ 1500 denier of polypropylene (PP) material,

The polypropylene yarn of the safety net 11 and the belt 12 further includes a flame-retardant treated with an eco-friendly flame retardant in the spinning process. The flame retardant is ethylenebis (tetrabromophthalimide), It includes one or more selected from the group consisting of ethane1,2bis(Pentabromophenyl).

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As a preferred embodiment of the safety net 11 of the vertical fall prevention net 10, as shown in FIG. 7, a plurality of ring-shaped rotating rings (R) in the vertical direction are formed in a plurality at regular intervals in the vertical direction. A plurality of connecting yarns 100 are arranged in the horizontal direction,

A first vertical connecting yarn 200 and a second vertical connecting yarn 210 are provided which wrap a plurality of rotation rings (R) formed in the vertical direction of the main connecting yarn 100 to be crossed in a zigzag on the left and right sides in the vertical direction,

After wrapping the rotating ring (R) of the main connecting yarn 100 on the one side, the first to weave the rotating ring (R) of the main connecting yarn 100 over the one or more main connecting yarns 100 in the horizontal direction. A horizontal connecting yarn 300 and a second horizontal connecting yarn 310 are provided,

The first horizontal connecting yarn 300 and the second horizontal connecting yarn 310 are arranged to cross between the main connecting yarns 100 .

As a preferred embodiment of the flame retardant treatment on the safety net 11 and the belt 12 of the vertical fall arrest net 10, GREEN ARMOR FLAME RETARDANT, TETRABROMOBISPHENOL A-BIS (2,3 DIBROMOPROPYL ETHER), BROMINATED POLYACRYLATE, TRIS ( TRIBROMONEOPENTYL) a mixing process of mixing 10 to 30 parts by weight of PHOSPHATE and 1 to 10 parts by weight of 2,3 DIMETHYL - 2,3 DIPHENYLBUTANE;

a mixing process of putting the mixture of the mixing process into a mixer and mixing for 10 to 20 minutes to form particles of the mixture with a size of 0.0005 to 0.0015 mm by a cutter blade;

an extrusion process of extruding the mixture of the mixing process through a 180-220 mesh mesh at 180° C. to 200° C. to produce a flame-retardant extrudate;

a processing step of cooling the flame-retardant extrudate of the extrusion process to cut the flame-retardant extrudate into 2-3 mm and processing it into flame-retardant chips;

A melting step of mixing 2 to 8 parts by weight of the flame-retardant chip with 100 parts by weight of the solid polypropylene raw material with the solid polypropylene raw material and melting at 210 to 280° C. to produce a melt;

an extrusion spinning process of extruding and spinning the melt of the melting process to produce a polypropylene filament yarn;

It is completed through a cooling process of cooling the polypropylene filament yarn that has undergone the extrusion spinning process to 14 ~ 26 ℃.

Examples of 10 to 30 parts by weight of the mixture in the mixing process include one of GREEN ARMOR FLAME RETARDANT or TETRABROMOBISPHENOL A-BIS (2,3 DIBROMOPROPYL ETHER) or BROMINATED POLYACRYLATE or TRIS (TRIBROMONEOPENTYL) PHOSPHATE.

Another embodiment of 10 to 30 parts by weight of the mixture of the mixing process is to combine one or more of GREEN ARMOR FLAME RETARDANT, TETRABROMOBISPHENOL A-BIS (2,3 DIBROMOPROPYL ETHER), BROMINATED POLYACRYLATE, and TRIS (TRIBROMONEOPENTYL) PHOSPHATE.

In another embodiment of 10 to 30 parts by weight of the mixture in the mixing process, 1 to 5 parts by weight of other stabilizers are mixed in addition to 10 to 30 parts by weight of the mixture in the mixing process.

In the present invention configured as described above, the safety net 11 and the belt 12 of the vertical fall prevention net 10 for construction are made of polypropylene (PP), which is the same material, but the safety net 11 is threaded in the horizontal or vertical direction. Formed in a knitted fabric manufactured by supplying a plurality of rotating rings (R) to form a loop and connecting the plurality of rotating rings (R) to the loops,

The belt 12 is preferably made of plain weave to withstand a large load.

The material of the safety net 11 and the belt 12 of the fall arrest net 10 of the present invention is polypropylene (PP) for the reason that environmental hormones are not emitted even during combustion because polypropylene (PP) is made of only carbon and hydrogen. As one of the most important plastics in the world, it is the lightest and safest plastic and is used for lighting equipment, food containers, toys, mats, and thermos bottles.

The safety net 11 of the fall prevention net 10 used in the present invention uses 800 to 1300 denier of polypropylene (PP) material, and the belt 12 uses 900 to 1500 denier of polypropylene (PP) material. it is preferable

As shown in FIG. 1, the fall arrest net 10 of the present invention is an opening provided for each floor with an opening 2 for providing a veranda or a window frame on the outer surface of the structure 1 of the building when a new building such as an apartment is constructed, as shown in FIG. (2) The fasteners 3 are provided on both sides to connect the belt 12 of the fall prevention net 10 to secure the safety net 11 with the fastener 3 and tension.

As an embodiment combining the safety net 11 and the belt 12 of the fall prevention net 10, it is preferable to sew with a polypropylene (PP) yarn,

A reinforcing bar 13 made of polypropylene (PP) is provided outside the safety net 11 to close the exterior of the safety net 11 with the belt 12 and the reinforcing bar 13 to make the safety net 11 strong. It is to extend the durability and life of the fall arrest net 10 installed in the opening (2).

The flame retardant mixed and reacted as described above has excellent compatibility with polypropylene (PP), exhibits excellent thermal stability and flame retardancy even at a low dose, and is environmentally friendly and has excellent stability at high temperature.

The temperature of 180 ℃ ~ 200 ℃ of the extrusion process is automatically adjusted to the temperature set by the electric heater and temperature sensor,

In the melting process, the dispersion bonding of the flame retardant and polypropylene in the screw for high mixing causes a polymerization reaction and good dispersion,

And, in the melting process, pigments or foreign substances from the outside are filtered out through a 180 ~ 220 mesh network and then extruded with a die.

The reason for processing by the extrusion method is that most of polypropylene, flame retardant, coupling agent, and dispersant are generally in a powder or liquid state, so it is difficult to directly mix with polypropylene and mix with polypropylene, so flame retardants, additives, This is to solve this problem that plastic products with desired special functions cannot be manufactured due to poor dispersion of the dispersant.

The present invention configured as described above is based on 100 parts by weight of a solid polypropylene raw material by mixing and mixing polypropylene (PP) and a flame retardant constituting the fall arrest net 10 and mixing and pulverizing a solid flame-retardant chip cut into 2 to 3 mm. Mix 2 to 5 parts by weight of flame-retardant chips and melt them at 210 to 280 ° C. .

At this time, when the flame-retardant additive is mixed with the polypropylene (PP) filament yarn and melt-spun to the polypropylene filament yarn at 210° C. or less when the flame-retardant yarn is manufactured, the flame-retardant additive is not completely melted, so that the flame-retardant additive is added to the surface of the polypropylene filament yarn. There is a problem in that it does not adhere completely and is not formed integrally.

In addition, when a flame retardant additive is mixed with a polypropylene filament yarn when manufacturing a flame retardant yarn and melt-spun onto a polypropylene filament yarn at 280° C. or higher, the flame retardant additive is diluted due to the high temperature and the flame retardant additive is completely different on the surface of the polypropylene filament yarn. There is a problem in that it does not stick and flows down, so that it is not completely integrally formed.

The present invention configured as described above is a method for falling workers or building materials due to an opening 2 provided on the wall of a structure (1) such as a veranda or a window frame provided in the wall structure (1) for each household during construction work such as an apartment. In order to install the fall arrest net (10) to solve the problems caused by

First, a safety net 11 is positioned to accommodate the opening 2 in the fastener 3 provided on one side of the peripheral surface structure 1 of the opening 2, and a plurality of belts 12 extending in the longitudinal direction on both sides. is to hang on both sides of the fixture (3) to cause failure.

Structural formulas of GREEN ARMOR FLAME RETARDANT, TETRABROMOBISPHENOL A-BIS (2,3 DIBROMOPROPYL ETHER), BROMINATED POLYACRYLATE, and TRIS (TRIBROMONEOPENTYL) PHOSPHATE, which are examples of the flame retardant of the present invention, are as follows.

The structural formula of the flame retardant embodiment of the present invention, DIMETHYL-2,3 DIPHENYLBUTANE, is as follows.

GREEN ARMOR FLAME RETARDANT, TETRABROMOBISPHENOL A-BIS (2,3 DIBROMOPROPYL ETHER), BROMINATED POLYACRYLATE, TRIS (TRIBROMONEOPENTYL) PHOSPHATE and DIMETHYL - 2,3 DIPHENYLBUTANEPHENYL, which are examples of the flame retardant of the present invention, are as follows.

It is possible to produce products with excellent flame retardancy performance while significantly reducing combustion time from the combined flame retardant structural formula configured as described above.

The present invention is first of a solid granular flame retardant GREEN ARMOR FLAME RETARDANT, TETRABROMOBISPHENOL A-BIS (2,3 DIBROMOPROPYL ETHER), BROMINATED POLYACRYLATE, TRIS (TRIBROMONEOPENTYL) PHOSPHATE 10-30 parts by weight and 2,3 DIMETHYL-2,3 DIMETHYL-2,3 DIMETHYL ~10 parts by weight of the mixture is put into the mixer and mixed for 10 to 20 minutes with a cutter blade. The solid granules are evenly mixed. Flame-retardant powder with a size of 0.0005 to 0.0015 mm is used as a dispersant to convert the flame-retardant powder into the entire polypropylene. to be well dispersed and diffused,

The UV stabilizer and antioxidant are used to mix evenly and well to prevent damage by sunlight and weather when installed outdoors for a long period of time.

The mixture of this mixing process is extruded into flame-retardant chips through a 180-220 mesh at 180° C. to 200° C., and the flame-retardant extrudate extruded to a size of 180 to 220 mesh is cooled to facilitate cutting, and then extruded flame-retardant extrusion It is to produce flame-retardant chips by cutting water into 2-3 mm.

In this way, 2 to 8 parts by weight of the flame-retardant chips cut into 2 to 3 mm are mixed with 100 parts by weight of the solid polypropylene raw material and melted at 210 to 280 ° C. It is to melt the propylene to be mixed.

At this time, if 0.1 to 2 parts by weight of the flame-retardant chip is added based on 100 parts by weight of the polypropylene raw material, the flame retardancy does not meet the standard specifications, so the flame retardancy is not good. In this case, a lot of expensive flame-retardant chips are used, so the price rises, and flame retardancy can be excellent due to excessive input of flame-retardant chips. If the ratio of flame-retardant chips increases as a cause of lowering the strength of the polypropylene, the strength of the polypropylene itself decreases, and thus the strength of the flame-retardant yarn also decreases.

The flame retardant chip of the present invention contains approximately 30 to 40% of the flame retardant, and when the flame retardant is 30% or less, the flame retardant and flame retardant are not properly performed, and when the flame retardant is 40% or more, the coupling agent and the dispersant provided inside the flame retardant It is not possible to harmonize with the back, so that the flame retardancy is not performed properly.

The melt that has undergone this melting process is extruded and spun to a thickness of a desired size and cooled to 14 to 26° C. to produce a polypropylene filament yarn containing a flame retardant.

At this time, the particle size of the flame-retardant powder of the mixture of the mixing process is formed in a size of 0.0005 to 0.0015 mm in order to make a particle size with excellent particle dispersibility to improve fiber processability.

In order to improve the flowability of the polypropylene and the flame retardant and induce high dispersibility, a dispersant Ca-St is added to react the flame retardant with the polypropylene to make the flowability the same, thereby improving flame retardancy, bonding, and dispersibility.

And, UV stabilizer HS-944FD (Poly-{[6-{1,1,3,3-quarivalantbutymethyl)-subamidlo}-1,3,5-trivancezne-2,4-bivalence][2,(2,2) ,6,6-tetramethy1-pipeidyl)subamido-subhexamethyl-[4-(2,2,6,6-trtramethy)-subamido]}0.1~1% is added to improve weather resistance.

The temperature of 180 ℃ ~ 200 ℃ of the extrusion process is automatically adjusted to the temperature set by the electric heater and temperature sensor,

In the melting process, the dispersion bonding of the flame retardant and polypropylene in the screw for high mixing causes a polymerization reaction and good dispersion,

And, in the melting process, pigments or foreign substances from the outside are filtered out through a 180 ~ 220 mesh network and then extruded with a die.

The reason for processing by the extrusion method is that most of polypropylene, flame retardant, coupling agent, and dispersant are generally in a powder or liquid state, so it is difficult to directly mix with polypropylene and mix with polypropylene, so flame retardants, additives, This is to solve this problem that plastic products with desired special functions cannot be manufactured due to poor dispersion of the dispersant.

The present invention configured as described above is a solid flame-retardant chip cut into 2-3 mm by mixing and mixing the polypropylene yarn and the flame retardant constituting the fall arrest net 10, and 100 parts by weight of the solid polypropylene raw material. By mixing 2 to 8 parts by weight and melting at 210 to 280° C. to create a melt, and melting and spinning so that the flame retardant chip containing the flame retardant component and the polypropylene are mixed, the polypropylene filament yarn and the flame retardant can be melted optimally.

At this time, if the flame retardant additive is mixed with the polypropylene filament yarn and melt-spun to the polypropylene filament yarn at 210° C. or less, the flame retardant additive is not completely melted and the flame retardant additive is not completely adhered to the surface of the polypropylene filament yarn. There is a problem that it is not formed.

In addition, if the flame retardant additive is mixed with the polypropylene filament yarn and melt-spun to the polypropylene filament yarn at 280 ° C. or higher, the flame retardant additive is diluted due to the high temperature and the flame retardant additive flows down without being completely adhered to the surface of the polypropylene filament yarn. There is a problem in that it is not completely formed integrally.

1: structure 2: opening
3: fixture 10: fall arrest net
11: safety net 12: belt
13: reinforcing bar 100: main connector
200: first vertical connecting yarn 210: first vertical connecting yarn
300: first horizontal connecting yarn 310: second horizontal connecting yarn
R: ring

Claims (4)

When building construction works such as apartments, prepare a wall structure (1) for each household in an opening (2) such as a veranda or window frame, and extend a plurality of longitudinal belts (12) to both sides of the safety net (11) to close the ends. The polypropylene yarn of the safety net 11 and the belt 12 fixed by the fixture 3 of the structure 1 is a vertical fall for eco-friendly construction, characterized in that it further comprises a flame-retardant treatment with an eco-friendly flame retardant in the spinning process. In the prevention net,
The safety net 11 uses 800 to 1300 denier of polypropylene (PP) material to supply yarn in the horizontal or vertical direction to weave in the form of a net to form a plurality of loop types to prevent tissue deformation. A plurality of main connecting yarns 100 forming a plurality of ring-shaped rotary rings (R) at regular intervals in the vertical direction are arranged in plurality in the horizontal direction,
A first vertical connecting yarn 200 and a second vertical connecting yarn 210 are provided which wrap the rotation rings (R) formed in plurality in the vertical direction of the main connecting yarn 100 to be crossed in a zigzag on the left and right sides in the vertical direction,
After wrapping the rotating ring (R) of the main connecting yarn 100 on the one side, the first to weave the rotating ring (R) of the main connecting yarn 100 over the one or more main connecting yarns 100 in the horizontal direction. A horizontal connecting yarn 300 and a second horizontal connecting yarn 310 are provided,
The first horizontal connecting yarn 300 and the second horizontal connecting yarn 310 are provided in the form of a net to be arranged to cross between the main connecting yarns 100 to prevent deformation of the loop-type net structure. Vertical fall arrester for eco-friendly construction. delete delete delete

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