KR101851920B1 - Process for Producing Molded Grating Using Phenol Resins and Molded Grating for Producing The Same - Google Patents

Abstract

The purpose of the present invention is to provide a manufacturing method of a molded grating using a phenol resin and the molded grating manufactured thereby, wherein the manufacturing method is safe since flame propagation is prevented and does not generate toxic gases when fire occurs due to incombustibility of the molded grating by manufacturing the molded grating using a phenol resin, and the manufacturing method can manufacture a product with excellent economic efficiency, strength and appearance by enabling a lattice-shaped structure to be integrated and simplifying a process of the product. The manufacturing method of the molded grating using a phenol resin of the present invention: 1) a first step of pouring a phenol resin composition including 100 parts by weight of the phenol resin, 10 to 40 parts by weight of a curing agent, 20 to 100 parts by weight of aluminum hydroxide, and 1 to 15 parts by weight of antimony trioxide into a forming mold of a plastic material to maintain the phenol resin composition at 10 to 25°C; 2) a second step of injecting 20 to 60 parts by weight of a glass fiber into 100 parts by weight of the phenol resin composition of the first step, and impregnating the glass fiber with the phenol resin composition at 10 to 25°C; 3) a third step of curing the glass fiber which has been impregnated with the phenol resin composition in the second step at 50 to 90°C to manufacture a fiber reinforced plastic (FRP); 4) a fourth step of demolding the FRP manufactured in the third step from the forming mold at room temperature; and 5) a fifth step of post-curing the FRP demolded in the fourth step at 100 to 150°C for 2 to 4 hours to complete the molded grating. The manufacturing method of the present invention can manufacture the molded grating, not a pultruded grating, by using the phenol resin composition.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing a mold grating using a phenol resin, and a mold grating manufactured from the method.

The present invention relates to a process for producing a mold grating using a phenolic resin and a mold grating manufactured therefrom. More particularly, the present invention relates to a method for producing a grating by using a mold grating instead of a pultruded grating by using a phenol resin, thereby preventing flame propagation due to incombustibility and generating toxic gas, Can be integrated with each other, and the process of the product is simple, so that the product can be manufactured with excellent economy and excellent strength and appearance.

Grating is a grid-like structure used for the lid of an outdoor drainage pipe. The meaning of the civil engineering term is a steel lattice structure used to prevent weight loss and wind from falling on the pole suspension bridge. This is installed for the purpose of preventing inflow of waste and drainage of the stormwater and sewage while easily draining it, and preventing people or animals from falling into the drainage line or the house.

A commonly used grating has a structure in which a plurality of connecting members are fixed at regular intervals in a frame constituting an outer surface. The connecting members are arranged in a straight line in a side-by-side direction maintaining a space, or in a lattice form, and these gratings are made of metal or plastic material.

Gratings made of metallic materials are manufactured by cutting, welding, plating, etc. using plate-shaped materials. Gratings of these materials require many welding processes (projection welding, end plate welding) , Large-scale manufacturing facilities are required, and production time is long.

It also involves a hot dip galvanizing process to prevent corrosion of the material, which can cause environmental problems. Therefore, the metal grating can be suitably used for applications requiring a large load, but it has many problems as described above.

On the other hand, since the grating made of plastic is not accompanied by the welding and plating process, it is easier to manufacture and install than the grating made of metal, but since the strength is lower than that of metal, the thickness of the frame and the connecting member must be made thick, The grating is cut or deformed to fail to exhibit its function, and further, harmful gas is generated, which is fatal to the human body.

In addition, when the grating is manufactured by the injection molding method, the frame and the connecting member are formed in a tight shape with no empty space, thereby excessively increasing the weight of the product. In addition, when manufacturing the grating by the draw-forming method, the lattice structure is not integrated, and it takes a lot of time and cost to assemble the lattice structure, so that a product having low economical efficiency has to be manufactured.

As a related art related to this, Patent Document 01 below discloses " a frame forming an outer frame; A plurality of connection members fixed within the frame while maintaining a gap therebetween; Quot; grating " in which the connecting member has a surface made of plastic, in which a reinforcing member is inserted. However, the above-mentioned invention has a disadvantage in that it requires a complicated work for assembling the frame, the connecting member and the stiffener in order to integrate the frame, the connecting member and the stiffener, and the grating is burnt during the fire to cut or deform or generate harmful gas.

Therefore, in order to solve such a problem, it is necessary to develop a technique for grating which is lighter than metal and has excellent strength and does not burn even when a fire occurs.

Open Patent Publication No. 10-2012-0062401 (June 14, 2012)

The present invention has been made to solve the above-mentioned problems and difficulties, and it is an object of the present invention to provide mold grating using a phenol resin to prevent flame propagation and toxic gas from occurring due to incombustibility, , A lattice structure can be integrated, and a process of a product is simple, so that a product having excellent economy, strength and appearance can be manufactured, and a mold grating manufactured therefrom.

In order to achieve the above-mentioned object, the present invention provides a process for producing a plastic material, comprising the steps of: 1) mixing 100 parts by weight of a phenol resin, 10 to 40 parts by weight of a curing agent, 20 to 100 parts by weight of aluminum hydroxide, and 1 to 15 parts by weight of antimony trioxide Pouring the resulting phenolic resin composition to maintain the temperature at 10 to 25 캜; 2) a second step of adding 20 to 60 parts by weight of glass fibers to 100 parts by weight of the phenol resin composition of the first step and impregnating the mixture at 10 to 25 ° C; 3) a third step of curing the phenolic resin composition and the glass fiber impregnated in the second step at 50 to 90 캜 to produce a reinforced plastic (FRP); 4) a fourth step of demolding the reinforced plastic produced in the third step at room temperature from the molding die; 5) a fifth step of curing the tempered plastic after demolding at 100 to 150 ° C. for 2 to 4 hours in the fourth step to complete the grating; do.

Further, the present invention provides a mold grating manufactured by the method of manufacturing the mold grating.

Means for solving the other specific problems according to the present invention are described in the detailed description of the invention.

The process for producing the mold grating using the phenolic resin according to the present invention and the mold grating manufactured therefrom can be carried out by molding the grating using the phenol resin composition so that poison gas due to incombustibility is not generated when the fire occurs, , The lattice structure is integrated, and the process of the product is simple, so that the economical efficiency is excellent.

Further, since the shrinkable property of the phenol resin can be improved, a product which is not deformed after curing can be produced, and thus it is possible to produce a grating having excellent strength and appearance.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic process diagram for explaining a method of producing a mold grating using a phenolic resin according to the present invention. FIG.
2 is a photograph of a mold grating manufactured by a method of manufacturing a mold grating using the phenol resin of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more fully illustrate the present invention to those skilled in the art. Therefore, the shape and detailed configuration of elements in the drawings have been simplified for explanation. It is to be understood that the terminology used herein is for the purpose of describing preferred embodiments of the present invention.

Hereinafter, details of the manufacturing method and structure of the mold grating using the nonflammable phenolic resin of this embodiment, together with detailed description thereof, will be described. The mold grating using the phenol resin of the present invention and the method for producing the same are not limited thereto and may be used without limitation in various facilities and sites requiring nonflammability and dimensional stability.

FIG. 1 is a schematic process diagram for explaining a method of manufacturing a mold grating using a phenol resin according to the present invention. FIG. 2 is a schematic view of a mold It's a picture of Grating.

The method for producing the mold grating using the phenol resin according to the present invention comprises the steps of: 1) mixing 100 parts by weight of a phenol resin, 10 to 40 parts by weight of a hardener, 20 to 100 parts by weight of aluminum hydroxide, and 1 to 15 parts by weight of antimony trioxide A phenol resin composition is poured and kept at 10 to 25 캜; 2) a second step of adding 20 to 60 parts by weight of glass fibers to 100 parts by weight of the phenol resin composition of the first step and impregnating the mixture at 10 to 25 ° C; 3) a third step of curing the phenolic resin composition and the glass fiber impregnated in the second step at 50 to 90 캜 to produce a reinforced plastic (FRP); 4) a fourth step of demolding the reinforced plastic produced in the third step at room temperature from the molding die; 5) a fifth step of curing the reinforced plastic demolded at the fourth step at 100 to 150 ° C for 2 to 4 hours to complete mold grating.

First, the first step is a preparation step of a mold grating method using a phenol resin according to the present invention. In the preparation step, 100 parts by weight of a phenol resin, 10 to 40 parts by weight of a curing agent, 20 to 100 parts by weight of aluminum hydroxide And 1 to 15 parts by weight of antimony trioxide is poured therein to maintain the temperature at 10 to 25 占 폚.

More specifically, according to various types of gratings, a phenol resin composition composed of additives such as phenol resin and hardener is poured after confirming the surface condition of the molding die treated with the mold release agent. At this time, it is possible to provide a hot water line which can be heated to maintain a suitable temperature of the molding mold at 10 to 25 ° C. If the temperature is less than 10 ° C, the workability is deteriorated. If it exceeds 25 ° C , The gelation speed of the phenolic resin composition is increased, which is not preferable. The molding die may be made of plastic, and among them, any one selected from polyethylene, polypropylene, ABS resin and fluorine resin (Teflon) may be used.

As the phenol resin, there are various kinds, and it is preferable to use a Resol Type phenol resin.

Further, as the kind of the curing agent, P-toluenesulfonic acid (PTSA), xylene sulfonic acid (XSA) and sulfuric acid may be listed. Among them, P-toluenesulfonic acid (PTSA) has a longer curing speed due to a slow curing rate, but the curing is tight and the strength is improved. Xylene sulfonic acid (XSA) is similar in performance to PTSA but has a disadvantage in that the color becomes darker when cured, and xylene is contained as an impurity, thereby lowering the strength. Sulfuric acid is hard to work because it is hard to cure, and there is a disadvantage that density is low and strength is weak. These curing agents are hard to cure when the acidity is high, so they may be diluted with water or methanol in order to control them, or they are often mixed with a curing agent.

When the amount of the curing agent is less than 10 parts by weight, the curing is incomplete. When the amount of the curing agent is more than 40 parts by weight, the gelation time is increased and the work becomes difficult A problem arises.

Both aluminum hydroxide and antimony trioxide are additives used as flame retardants. In view of their blending amount, it is preferable to blend 20 to 100 parts by weight of aluminum hydroxide and 1 to 15 parts by weight of antimony trioxide with respect to 100 parts by weight of the phenol resin. If the amount of aluminum hydroxide added is less than 20 parts by weight, the flame retardancy becomes poor. When the amount is more than 100 parts by weight, the viscosity increases and the strength decreases. If the amount of the antimony trioxide is less than 1 part by weight, the flame retardancy becomes weak. If the amount is more than 15 parts by weight, toxicity increases. In addition, since these phenol resins have a property of shrinking easily when cured, the addition of the above flame retardant can prevent shrinkage of the phenol resin during curing, thereby improving the quality of the product.

In the second step, the glass fiber, which is a kind of reinforcing fiber, is added to 100 parts by weight of the phenol resin composition of the first step at a ratio of 20 to 60 parts by weight, followed by impregnation at 10 to 25 ° C. The glass fiber may be of various types, but it is preferable to use a roving product. At this time, the strength is lowered when the glass fiber is less than 20 parts by weight, and when the glass fiber is more than 60 parts by weight, workability is difficult. If the impregnation temperature is less than 10 ° C, the work becomes difficult.

In the third step, the reinforced plastic (FRP) is prepared by curing the phenolic resin composition and the glass fiber impregnated in the second step at 50 to 90 ° C. If the curing temperature is less than 50 ° C, the curing is delayed and the demolding becomes difficult. When the temperature exceeds 90 ° C, the material of the molding mold is melted because it is a synthetic resin.

The fourth step is a step of demolding the reinforced plastic made in the third step from the molding mold at normal temperature. At this time, desorption at room temperature desirably is carried out with the heat source removed from the forming mold.

The fifth step is a final step in which the reinforced plastic demolded in the fourth step is cured at 100 to 150 ° C for 2 to 4 hours to complete the grating. If the post-curing temperature is less than 100 ° C, complete curing is not performed, and the strength may be lowered and deformation due to shrinkage may occur. If the temperature exceeds 150 ° C, energy cost is excessively generated.

As described above, the mold grating manufactured by continuously performing the processes of the first to fifth steps is excellent in flame retardancy and dimensional stability, and is integrated by the lattice structure, thereby being simple to manufacture, light in weight and excellent in mechanical properties such as strength So that a product can be manufactured.

Hereinafter, the present invention will be described in more detail with reference to examples and drawings.

<Examples>

The mold grating according to the present invention can be produced according to the following process.

First, 30 kg of a resol-type phenolic resin, 7 kg of P-toluenesulfonic acid (PTSA), 15 kg of aluminum hydroxide as a flame retardant, and 1 kg of antimony trioxide were thoroughly mixed in a mold made of polyethylene to prepare a phenolic resin composition. After poured into the molding mold, 12 kg of glass fiber roving was impregnated into 53 kg of the phenol resin composition, followed by impregnation at 25 ° C. Subsequently, the phenolic resin composition and the glass fiber were cured at 80 ° C to prepare a reinforced plastic, demolded at room temperature, and cured at 130 ° C for 2 hours to complete mold grating.

<Comparative Example>

Compared with the examples, mold gratings were manufactured in the same manner except that the vinyl ester resin was used instead of the phenol resin composition.

&Lt; Experimental Example 1 >

The non-flammable ductility and toxicity to the mold gratings prepared in the Examples and Comparative Examples are the most commonly used standard measurement methods of IMO. 2010 FTP Code Part 2, and the results are shown in Table 1.

    Flexibility and toxicity results Item Radiant heat dose   25㎾ / ㎡   25㎾ / ㎡   50㎾ / ㎡ Performance criteria Burner flame radish U radish Example Ductility medium 15.9 8.3 41.8 <200 Toxic CO
HCN
HCl
HBr
HF
NO _x
SO ₂ 179.8
ND
59.7
ND
ND
ND
22.7 142.7
ND
18.8
ND
ND
ND
28.5 472.4
ND
14.9
ND
ND
ND
73.9 ≤1,450
≤140
≤600
≤600
≤600
≤350
≤120 Comparative Example Ductility medium 985.2 718.3 1,241.5


Homology Toxic CO
HCN
HCl
HBr
HF
NO _x
SO ₂ 1,179.1
71.1
235.5
52.2
34.4
48.9
112.1 742.4
33.9
178.3
23.4
20.1
38.1
88.5 2,027.2
29.9
294.9
45.2
39.9
52.0
192.6

&Lt; Experimental Example 2 > Flame propagation test

Flame propagation tests on mold gratings prepared in Examples and Comparative Examples were carried out by IMO. 2010 FTP Code Part 5, and the results are shown in Table 2.

   Flame propagation test result Average sustained heat Qsb
(MJ / m 2) Critical heat flux during extinguishing CFE
(㎾ / ㎡) Total calorific value Qt
(MJ) Peak heat release rate Qp
(㎾) Flame fall ≥ 1.5 ≥20 ? 0.7 ? 4.0 Not allowed ≥ 0.15 ≥3.1 ? 0.15 ≤1.2 Less than 12

[Experimental Results Analysis] From the experimental results of Examples and Comparative Examples, mold grating according to the preferred embodiment of the present invention is superior to mold grating of the comparative example in all characteristics such as ductility, toxicity, and flame propagation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. . Accordingly, it should be apparent that the true scope of the present invention is defined by the following claims.

Claims (7)

1) A phenolic resin composition comprising 100 parts by weight of a phenol resin, 10 to 40 parts by weight of a hardening agent, 20 to 100 parts by weight of aluminum hydroxide and 1 to 15 parts by weight of antimony trioxide is poured into a molding mold of a plastic material at 10 to 25 ° C ;
2) a second step of adding 20 to 60 parts by weight of glass fibers to 100 parts by weight of the phenol resin composition of the first step and impregnating the mixture at 10 to 25 ° C;
3) a third step of curing the phenolic resin composition and the glass fiber impregnated in the second step at 50 to 90 캜 to produce a reinforced plastic (FRP);
4) a fourth step of demolding the reinforced plastic produced in the third step at room temperature from the molding die;
5) A method for manufacturing a mold grating using a phenol resin, comprising the steps of: curing the reinforced plastic at 600 ° C to 150 ° C for 2 to 4 hours to complete mold grating.
The method according to claim 1,
Wherein the plastic material of the first step is made of any one selected from the group consisting of polyethylene, polypropylene, ABS resin, and fluorine resin (Teflon).
3. The method of claim 2,
Wherein the phenol resin in the first step is a resol type phenol resin.
The method of claim 3,
Wherein the curing agent in the first step is at least one selected from the group consisting of P-toluenesulfonic acid (PTSA), xylene sulfonic acid (XSA), and sulfuric acid.
5. The method of claim 4,
Wherein the glass fibers in the second step are glass rovings. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt;
6. The method of claim 5,
Wherein the glass fibers in the third step are glass rovings. &Lt; RTI ID = 0.0 &gt; 8. &lt; / RTI &gt;
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