KR101622708B1

KR101622708B1 - Using waste fiber flame retardant gasket and method of manufacturing the same

Info

Publication number: KR101622708B1
Application number: KR1020150054153A
Authority: KR
Inventors: 서근중
Original assignee: 대진산업(주)
Priority date: 2015-04-17
Filing date: 2015-04-17
Publication date: 2016-06-01

Abstract

The present invention relates to a hybrid flame retardant gasket using waste fiber and a method of manufacturing the same. The method comprises: a collection step (S10); a pulverizing and mixing step (S20); a beating step (S30); a papermaking step (S40); a dehydration step (S50); a first drying step (S60); a first cutting step (S70); a spray step (S80); a dipping step (S90); a second drying step (S100); a compression forming step (S110); a second cutting step (S120); and a tailoring step (S130). Therefore, environmental pollution due to waste fiber can be reduced, and further, structural stability of a product can be more effectively enhanced.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a hybrid flame retardant gasket using waste fibers and a method of manufacturing the flame retardant gasket.

The present invention relates to a hybrid flame retardant gasket using waste fibers and a method of manufacturing the same. More particularly, the present invention relates to a flame retardant gasket which is made of waste fibers made of cotton or tricot material, pulp pulp and polypropylene fiber as main raw materials, In addition to being able to reuse pulp, it is possible to reduce environmental pollution caused by waste fiber, and it is effectively prevented from deformation at high temperature due to the characteristic of fiber material, so that the structural safety (durability) of product is improved compared with conventional rubber material non- And more particularly, to a hybrid flame retardant gasket using waste fibers and a method of manufacturing the same.

In general, a gasket is widely used for holding the airtightness of the flange by fitting the end face of the pipe and the pipe to the joint face of the flange when the flange is connected to each other.

As such gaskets, asbestos gaskets mainly made of asbestos as the main raw material have been developed, but due to environmental pollution problems, non-asbestos gaskets using rubber as the main material have been proposed.

However, the non-asbestos gasket made of rubber has a problem in that the structural stability is low due to the problem that when the oil component is removed due to the nature of the rubber, the gasket loses its function and easily deforms when exposed to high temperature .

Furthermore, the non-asbestos gasket made of rubber has a problem of environmental pollution due to the generation of toxic gas at the time of disposal.

Therefore, in the field of gaskets, the development of structurally stable and environmentally friendly gaskets is urgently required.

On the other hand, as the industry develops, the emission of various industrial wastes is further increased. In the case of fibers, sheets or various injection-molded products manufactured from petroleum compounds which are difficult to be biodegraded in nature, there is no treatment method that does not cause pollution except simple incineration.

In particular, cotton waste is produced in large quantities every year, and 10 to 20% of these fibers are used only for regeneration, while the remainder are disposed of by incineration or landfill. .

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of producing a gasket by using a cotton or tricot waste fiber and a pulp and polypropylene fiber as main raw materials, It is possible to reduce the environmental pollution caused by the waste fiber because it can be reused, and the deformation at high temperature is effectively prevented due to the characteristic of the fiber material, so that it is possible to provide a product having excellent structural safety (durability) And to provide a hybrid flame retardant gasket using the fiber and a method of manufacturing the same.

In addition, a hybrid flame retardant gasket using waste fiber which can more effectively enhance the structural safety of a product by adding a waterproofing agent for securing resistance to water or oil and a flame retardant agent for preventing combustion at a high temperature, and a manufacturing method thereof .

According to another aspect of the present invention, there is provided a method of manufacturing a hybrid flame retardant gasket using waste fibers, comprising the steps of collecting (S10) collecting waste fibers and pulp, A pulverizing and mixing step (S20) of pulverizing the cotton, tricot, pulp, and polypropylene fibers obtained from the collected waste fibers into a pulverizing apparatus to wet-pulverize the pulverized pulp to a length of 5 to 10 mm, A beating step (S30) of finely pulverizing the mixed raw materials through a pulverizing and mixing step (S20) into a flush mill, finely pulverizing the mixture to a length of 2 to 6 mm and mixing them, and a beating step (S30) (S40) for shaping the mixed raw materials mixed through the slurry feeding step (S30) into a plate-shaped sheet; and pressing the sheet-shaped sheet shaped through the papermaking step (S40) (S50) for removing a part of the water and forming a flat surface of the sheet; and a step of putting the sheet after the dehydration step (S50) into a drier at a temperature of 170 to 190 DEG C for 20 to 30 minutes A first drying step (S60) of drying the sheet to remove moisture remaining on the sheet, a first cutting step (S70) of cutting the sheet having passed through the first drying step (S60) to a predetermined size, A water repellent agent and water at a weight ratio of 1: 1: 2 to form a mixture, spraying the mixture at the top of the cut sheet in the first cutting step (S70) (S80) that allows the mixture to easily penetrate the interior of the sheet in such a manner that the mixture is coated on the surface of the sheet by allowing the sheet to pass through the spraying step (S80) for 2 to 3 minutesA second drying step (S100) of drying the inside and the outside of the sheet by irradiating the far infrared rays with the sheet through the dipping step (S90) for 50 to 70 minutes; The sheet dried in step S70 is pressurized with a press at a temperature of 170 to 190 DEG C at a pressure of 140 to 160 kgf / cm < 2 > for 2 to 4 minutes to melt the mixed polypropylene in the sheet, A second cutting step S120 of cutting the edge portion of the gasketing plate body through the compression molding step S110; and a second cutting step S120 of cutting the edge portion of the gasketing plate body through the compression molding step S110. And a cutting step S130 of cutting the gasket-forming plate into a shape of a gasket and fabricating the gasket as a finished product gasket.

The pulp fibers, the pulp pulp and the polypropylene fibers are mixed with each other at a weight ratio of 1: 1: 1.

The flame retardant may be selected from the group consisting of polyphosphate, tetrabromobisphenol A, brominated polystyrene (BPS), brominated epoxy oligomer (BEO), DBDPO, and HBCD.

According to another aspect of the present invention, there is provided a hybrid flame-retardant gasket using waste fibers, which is manufactured through the above-described method.

As described above, according to the hybrid flame-retardant gasket using the waste fiber according to the present invention and the method of manufacturing the same, it is possible to produce a gasket by using waste fibers of a cotton or tricot material, pulp pulp and polypropylene fiber as main materials, In addition to being able to reuse pulp, it is possible to reduce environmental pollution caused by waste fiber, and it is effectively prevented from deformation at high temperature due to the characteristic of fiber material, so that the structural safety (durability) of product is improved compared with conventional rubber material non- An excellent effect can be expected.

In addition, the structural safety of a product can be effectively enhanced by adding a waterproofing agent for securing resistance to water or oil and a flame retardant for preventing combustion at a high temperature.

1 is a block diagram of a hybrid flame retardant gasket manufacturing method using waste fibers according to an embodiment of the present invention.
Fig. 2 is a photograph of a hybrid flame retardant gasket using the waste fiber produced by the manufacturing method of Fig. 1

BRIEF DESCRIPTION OF THE DRAWINGS Fig. Detailed descriptions of well-known functions and constructions that may be unnecessarily obscured by the gist of the present invention will be omitted.

1 and 2 illustrate a hybrid flame retardant gasket using waste fibers according to an embodiment of the present invention and a method of manufacturing the same. FIG. 1 is a cross-sectional view of a hybrid flame retardant gasket manufacturing method using waste fibers according to an embodiment of the present invention. Fig. 2 is a photograph showing a hybrid flame-retardant gasket using waste fiber produced by the manufacturing method of Fig. 1, and Fig.

As shown in the drawing, a method 100 for manufacturing a hybrid flame-retardant gasket using waste fibers according to an embodiment of the present invention includes a collecting step (S10), a pulverizing and mixing step (S20), a beating step (S30) The first drying step S60, the first cutting step S70, the spraying step S80, the dipping step S90, the second drying step S60, the drying step S60, A drying step S100, a compression molding step S110, a second cutting step S120, and a cutting step S130.

As shown in FIG. 1, the collecting step (S10) is a step of collecting waste fibers and waste pulp, collecting cotton and tricot from the waste fibers, and collecting the collected cotton, tricot and pulp Is a process for removing foreign substances.

As shown in FIG. 1, the pulverizing and mixing step S20 is a step of pulverizing and mixing the cotton and the tricot obtained from the waste fibers collected in the collecting step S10, the pulp pulp and the polypropylene fiber together And the resulting mixture is wet-pulverized to have a length of 5 to 10 mm and mixed.

As shown in FIG. 1, the beating step S30 is a step of milling and mixing the pulverized and mixed raw materials through the pulverizing and mixing step (S20) into a flush mill and finely pulverizing the pulverized material to a length of 2 to 6 mm .

That is, the pulp fibers and the pulp pulverized in the flush pulverizer having water therein are wet pulverized to a length of 2 to 8 mm, and the pulp fibers and the pulp fibers fed together with the pulp pulp are mixed and mixed continuously with water, The pulverized mixed raw materials are transferred to and stored in a conventional storage tank. In this case, since the mixed raw materials stored in the storage tank can be cured, the pulverized raw materials can be cured by using a stirrer such as an agitator, So as to prevent curing.

At this time, the pulp fibers, the pulp pulp and the polypropylene fibers are mixed with each other at a weight ratio of 1: 1: 1, and the polypropylene fibers are mixed with pulverized pulp fibers and pulp pulp using cotton- Of course.

Here, the polypropylene fiber is melted with the waste fiber and the pulp while being melted by being exposed to a high temperature in the compression molding step (S110) to be formed later, so that the polypropylene fiber is easily shaped into a predetermined shape. 1, the strength of the finished gasket is kept low and it is difficult to expect an increase in the strength even when the gasket is mixed in excess of 1, so that the waste fibers and the pulp and the polypropylene fibers have a weight ratio of 1: 1: 1 By weight.

As shown in FIG. 1, the papermaking step S40 is a step of shaping a pulp-type mixed raw material mixed with porridge through a beating step S30 into a sheet-like sheet.

That is, the pulp-type raw materials stored in the storage tank are sucked by the down-pressure pump and discharged to a paper machine (dehydrator), and the paper machine partially drains water remaining in the raw materials and discharges a certain amount to the conveying conveyor. The discharged raw materials are seated on the conveying conveyor, and the plate shape is naturally formed.

As shown in FIG. 1, in the dehydrating step S50, a plate-shaped sheet shaped through the papermaking step S40 is pressed through a roller to partially remove water faded from the sheet, To form a flat surface.

At this time, the plate-shaped sheet conveyed through the conveying conveyor is formed into a flat sheet-like sheet which is continuously pressed and flatly pressed through the roller. Here, the pressed sheet-like sheet is conveyed on the conveying conveyor.

1, in the first drying step S60, the sheet having undergone the dehydration step (S50) is put into a dryer and dried at a temperature of 170 to 190 DEG C for 20 to 30 minutes to remove moisture .

Here, the dryer has a length of about 50 m and a drying time of about 170 to 190 ° C is about 20 to 30 minutes for the sheet-like sheet conveyed on the conveying conveyor to pass through the dryer, The sheet is passed through the dryer and moisture contained in the sheet is evaporated and dried.

Of course, the plate-like sheet is dried using the dryer for rapid production, but the plate-like sheet may be naturally dried by leaving it at a normal temperature for a certain time.

As shown in FIG. 1, the first cutting step S70 is a step of cutting a predetermined size of the sheet after the first drying step S60.

That is, the plate-shaped sheet fed on the conveying conveyor is continuously cut into a square plate shape while being passed through the cutter and conveyed.

1, the spraying step S80 comprises mixing the flame retardant, the waterproofing agent, and water in a weight ratio of 1: 1: 2 to form a mixture, and the mixture is cut in the first cutting step (S70) And spraying the mixture from the lower portion of the sheet to the lower portion of the sheet, thereby allowing the mixture to easily penetrate into the sheet.

That is, a mixture in which a flame retardant and a waterproofing agent are added is forcibly injected through an injector at an upper portion of a sheet-like sheet conveyed on the conveying conveyor, and a mixture of a flame retardant and a water- The flame retardancy and the waterproofing property of the interior of the gasket 200, which is made of the finished product, can be ensured in the cutting step (S130) to be carried out by the mixture forced to penetrate the interior of the sheet.

Since the gasket made of a mixed raw material in which the waste fiber and pulp pulp and polypropylene fiber are mixed is easily dewatered at a high temperature, it is preferable to improve the flame retardancy of the gasket through the addition of the flame retardant, Examples of the flame retardant include polyphosphate flame retardant, TBBA (Tetrabromobisphenol A) flame retardant, BPS (Brominated Polystyrene) flame retardant, BEO (Brominated Epoxy Oligomer) flame retardant, DBDPO flame retardant and HBCD flame retardant. Of course.

In addition, since the gasket made of the mixed raw material in which the waste fiber and the pulp pulp and the polypropylene fiber are mixed can easily penetrate into the inside of the gasket, the waterproof property of the gasket can be secured by adding the waterproofing agent, It is preferable that water penetration is effectively prevented even if it is exposed to oil and the like. The waterproofing agent of the WP-30 product of NABAKEM Co., Ltd. is used as the waterproofing agent, but it is not limited to such a waterproofing agent.

As shown in FIG. 1, the dipping step S90 is a step in which the sheet having passed through the spraying step S80 is immersed in the mixture containing the flame retardant agent and the water repellent agent for 2 to 3 minutes so that the mixture is coated on the surface of the sheet .

That is, since the mixture of the flame retardant and the waterproofing agent is effectively applied to the inside and the outside of the sheet through the spraying step (S80) and the dipping step (S90), the flame retardancy and waterproofing property of the finished gasket can be effectively ensured.

As shown in FIG. 1, the second drying step S100 is a step of drying the inside and the outside of the sheet by irradiating far-infrared rays with the sheet through the dipping step S90 for 50 to 70 minutes.

That is, the inside and the outside of the sheet can be smoothly dried through the wavelength of the far-infrared ray which can easily penetrate into the sheet.

As shown in FIG. 1, the compression molding step S110 is performed by pressing the sheet, which has been dried through the second drying step (S70), at a pressure of 140 to 160 kgf / Min to melt the mixed polypropylene in the sheet to finally produce a gasket-molded plate.

That is, when the plate-shaped sheet infiltrated with the flame retardant and the waterproofing agent through the press is exposed to high temperature, the polypropylene fiber, the flame retardant and the waterproofing agent are melted and penetrated into the gap between the waste fiber and the pulp, The gasket 200 of the present invention, which is a finished product formed by molding with a gasket molding plate, has excellent durability, flame retardancy and waterproofness.

At this time, it is needless to say that the irregularity of the surface of the sheet is solved during the process of melt-molding the sheet, and the surface of the gasket-molding plate is made flat so as to be usable as a product.

As shown in FIG. 1, the second cutting step (S120) is a step of cutting the edge portion of the gasket molding plate through the compression molding step (S110).

As shown in FIG. 1, the cutting step S130 may be performed by cutting the gasket-forming plate through the second cutting step S120 into the shape of a gasket and fabricating the gasket as a finished product. ).

In addition, the gasket 200 can be cut to various sizes according to various uses of the gasket 200, and it is also possible to use the gasket 200 to easily recognize sizes of the manufacturers or sizes before the cutting step S130 A printing process for printing information on the gasket 200 may be added.

The hybrid flame retardant gasket 200 using the waste fiber having the structural safety (durability), flame retardancy and waterproofness as shown in FIG. 2 can be easily manufactured through the above-described hybrid flame retardant gasket manufacturing method 100 using the waste fiber .

The method 100 for fabricating a hybrid flame-retardant gasket using the waste fiber of the present invention having the above-described process is a method for manufacturing a hybrid flame retardant gasket using waste fibers of a cotton or tricot material, pulp pulp and polypropylene fiber as main raw materials, In addition to being able to reuse waste fiber and pulp, it is possible to reduce environmental pollution due to waste fiber and it is effective to prevent deformation at high temperature due to the characteristic of fiber material, (Durability) can be expected.

Further, waterproofing properties and flame retardancy of the product can be enhanced by adding a waterproofing agent for securing resistance to water or oil and a flame retardant for preventing burning at high temperature.

The hybrid flame retardant gasket 200 using waste fibers having excellent durability, flame retardance, and waterproofing properties can be easily manufactured by the method 100 for manufacturing a hybrid flame retardant gasket using the waste fiber according to an embodiment of the present invention.

First, cotton and tricot are collected from waste fibers, and foreign matter remaining in the collected cotton, tricot and pulp is removed. (S10)

Then, the cotton and tricot obtained from the collected waste fibers, the pulp pulp and the polypropylene fiber are put into a mechanical pulverizer together and subjected to primary wet pulverization with a length of 5 to 10 mm. (S20)

Then, the raw materials for mixing the primary pulverized mixed pigments are put into a flush mill, and wet pulverized and mixed to a fine length of 2 to 6 mm to form pulp-shaped mixed raw materials such as porridge.

At this time, the pulp fibers, the pulp pulp and the polypropylene fibers are mixed in a weight ratio of 1: 1: 1. (S30)

Then, the pulp-shaped raw material is introduced into a paper machine (dehydrator), and the paper machine is formed into a sheet-like sheet by discharging a predetermined amount of the raw materials to a conveying conveyor. (S40)

Then, the sheet-like sheet fed through the conveying conveyor is pressed and dewatered to the rollers of various stages, and is formed into a flat plate-like sheet. (S50)

Then, the pressed sheet-like sheet is put into a dryer and dried at a drying temperature of 170 to 190 DEG C, preferably 180 DEG C for 20 to 30 minutes, preferably 25 minutes. (S60)

Then, the dried sheet-like sheet is continuously cut into a rectangular plate shape through a cutter. (S70)

Then, a mixture of the flame retardant and the waterproofing agent is injected through the injection device at the upper part of the sheet-like sheet conveyed on the conveying conveyor, and simultaneously the mixture is mixed with the flame retardant and the waterproofing agent Is forced to pass through the interior of the sheet to force the mixture into the sheet. (S80)

Then, the sheet is immersed in a mixture containing a flame retardant and a waterproofing agent for 2 to 3 minutes so that the mixture is coated on the outside of the sheet. (S90)

At this time, the flame retardancy and water resistance of the hybrid flame retardant gasket 200 using the waste fiber as an end product due to the flame retardant and the waterproofing agent applied to the inside and the outside of the sheet are secured.

Then, far infrared rays are irradiated to the sheet for 60 minutes to dry the inside and the outside of the sheet. (S100)

Then, the plate-like sheet is melted and pressed at 170 to 190 DEG C, preferably 180 DEG C and 140 to 160 kgf / cm2, preferably 150 kgf / cm2 pressure for 3 minutes, and molded into a gasket-molded plate. (S110)

At this time, when the sheet is exposed to high temperature through the press, the polypropylene fiber, the flame retardant and the waterproofing agent are melted and permeated into the gap between the pulp fiber and the pulp to form a gas tight inside the sheet, Flame retardancy and waterproofness of the hybrid flame retardant gasket 200 using the waste fiber of the present invention, which is the flame retardant gasket of the present invention.

Then, the edge portion of the gasket-forming plate body, which can not be manufactured, is cut off and discarded. (S120)

Then, the gasket molding plate is cut into the shape of a finished gasket, and is easily fabricated as a hybrid flame retardant gasket 200 using the waste fiber of the present invention. (S130)

As shown in FIG. 2, in order to verify the durability of the hybrid flame retardant gasket 200 using the waste fiber of the present invention fabricated as described above, even though it is a fiber material, endurance at high temperatures, A specimen having a thickness of 1.5 ± 0.1 mm and a length of 150 mm was taken out from the flame-retardant gasket 200 and exposed to a high temperature of 160 ° C. for 1 hour, and the change of the specimen was measured. As a result, .

Standard of KS L 5406 (Class A)

[Table 1]

That is, it was found that the hybrid flame-retardant gasket 200 using the waste fiber of the present invention is durable enough to withstand a high temperature of 160 ° C stably.

Therefore, the hybrid flame retardant gasket 200 using the waste fiber of the present invention is not only prevented from being deformed at a high temperature due to the characteristics of a fiber material, but also is waterproof and flame retardant by the addition of a flame retardant and a waterproofing agent, (Durability) in comparison with the conventional rubber material non-asbestos gasket.

Moreover, by producing the gasket by reusing the waste fiber and the pulp waste, the effect of preventing environmental pollution can be expected.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. You will understand the point. It goes without saying that variations can be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the scope of claim of the present invention is not limited within the scope of the detailed description, but will be defined by the following claims and technical ideas thereof.

S10. Collecting step S20. Mixing and grinding steps
S30. Beating step S40. Grass stage
S50. Dehydration step S60. The first drying step
S70. First cutting step S80. Spray stage
S90. Dipping step S100. Second drying step
S110. Squeeze forming step S120. Second cutting step
S130. Foundation stage
100. Hybrid flame retardant gasket manufacturing method using waste fiber
200. Hybrid flame retardant gasket using waste fiber

Claims

A collecting step (S10) of selectively collecting waste fibers and pulp pulp;
Pulverizing the surface and tricot obtained from the waste fibers collected in the collecting step (S10), the pulp pulp and the polypropylene fiber into a pulverizing apparatus and wet-pulverizing the pulverized pulp to a length of 5 to 10 mm, Mixing step S20;
A beating step (S30) in which the mixed raw materials pulverized and mixed through the pulverizing and mixing step (S20) are put into a flush mill and finely pulverized to a length of 2 to 6 mm to be mixed with each other;
A papermaking step (S40) of shaping the mixed raw materials mixed into the sheet shape through the beating step (S30);
A dehydrating step (S50) of pressing a sheet-shaped sheet shaped through the papermaking step (S40) through a roller to partially remove water faded from the sheet and forming a flat surface of the sheet;
A first drying step (S60) in which the sheet having undergone the dehydration step (S50) is put into a dryer and dried at a temperature of 170 to 190 DEG C for 20 to 30 minutes to remove moisture remaining in the sheet;
A first cutting step (S70) of cutting the sheet having undergone the first drying step (S60) to a predetermined size;
The flame retardant, the waterproofing agent and water are mixed at a weight ratio of 1: 1: 2 to form a mixture, and the mixture is sprayed at the top of the sheet cut in the first cutting step (S70) A spraying step (S80) in which the mixture easily penetrates into the sheet by a spraying method;
A dipping step (S90) in which the sheet after the spraying step (S80) is immersed in the mixture for 2 to 3 minutes so that the mixture is coated on the surface of the sheet;
A second drying step (S100) of drying the inside and outside of the sheet by irradiating the far infrared rays with the sheet through the dipping step (S90) for 50 to 70 minutes;
The sheet dried through the second drying step (S100) is pressurized at a temperature of 170 to 190 DEG C and at a pressure of 140 to 160 kgf / cm < 2 > for 2 to 4 minutes to melt the polypropylene mixed in the sheet, (S110);
A second cutting step (S120) of cutting the edge portion of the gasket molding plate through the compression molding step (S110);
And a cutting step (S 130) of cutting the gasket-forming plate body that has undergone the second cutting step (S 120) into the shape of a gasket and fabricating the gasket as an end product gasket (S 130). .

The method according to claim 1,
Wherein the waste fiber, the pulp pulp and the polypropylene fiber are mixed with each other at a weight ratio of 1: 1: 1.

delete

A hybrid flame retardant gasket using waste fibers, which is manufactured through the manufacturing method of claim 1 or claim 2.