KR102602876B1 - Manufacturing method of basalt fiber yarn coated with flame retardant resin - Google Patents

Abstract

The present invention relates to a method and apparatus for manufacturing flame-retardant resin-coated basalt fiber yarn for supplementing flame retardancy and strength on the outer surface of basalt fiber yarn, which has excellent flame retardancy and strength but significantly poor elongation, while reinforcing insufficient elongation. In particular, the present invention relates to a method and manufacturing apparatus for basalt fiber yarn. When coating flame retardant resin on the exterior, a smooth resin coating can be achieved through a pretreatment process, and the manufactured flame retardant resin-coated basalt fiber yarn is used to weave or cut into pellets and then thermoplasticize the flame retardant resin. This makes it possible to manufacture flame retardant sheets for various purposes.
As a means to solve the above problem, the present invention applies a volatile solvent to the basalt fiber yarn before coating it with a flame retardant resin, thereby concentrating the bulky multi-stranded filament yarn to reduce resistance to friction. , Damage to the filament yarn is minimized, but the volatile solvent is volatilized in full just before the flame retardant resin coating, so that uniform and smooth coating can be achieved. The basalt fiber yarn coated with the flame retardant resin is cooled through the first and second cooling tanks. , flame-retardant resin-coated basalt fiber yarn is manufactured by drying it through the first and second drying rooms and then winding it on a bobbin in the winding section.

Description

Manufacturing method of flame retardant resin coated basalt fiber yarn {Manufacturing method of basalt fiber yarn coated with flame retardant resin}

The present invention relates to a method for manufacturing flame-retardant resin-coated basalt fiber yarn. In particular, the flame-retardant basalt fiber yarn is coated with a thermoplastic and flame-retardant resin, thereby improving the touch and elongation, which are weak points of the basalt fiber yarn, and at the same time improving weaving properties. It improves the weaving of flame-retardant fabrics smoothly, and can be used to produce various types of sheets with excellent flame retardancy by cutting and heat-compressing them into pellets.

In general, basalt fiber is made by melting basalt containing various minerals at high temperature and then extracting it into yarn form, and can be manufactured at a lower cost than other fibers such as carbon or silica.

In addition, basalt fiber has little effect on environmental pollution, is non-carcinogenic, is harmless to living organisms, has excellent flame retardancy and heat resistance, and has particularly high mechanical strength and excellent resistance to chemicals.

For this reason, basalt fibers are useful in various industrial fields such as environmental filters, concrete reinforcing fibers, high-strength composite materials, fire curtains, and welding clothing.

Reviewing the prior art in which basalt fiber is applied to the industrial field, Patent No. 1268929, “Manufacturing method and high-strength panel of basalt uneven fabric using basalt fiber yarn” (Patent Document 1), Patent No. 10-2018519 “Basalt fiber composite material and manufacturing method thereof” (Patent Document 2), etc.

Reviewing the technical content of Patent Document 1, one of the adhesives made of cement paste or various resin solutions is applied to both sides of the basalt fabric fabric and then passed between the uneven roller and the uneven plate and pressed to form the basalt rock. A method of manufacturing a basalt uneven fabric fabric in which uneven parts that protrude and recess on both sides of the fabric are formed alternately and continuously, and a high-strength fabric that is lighter and stronger than iron plates, marble or tiles by using the basalt uneven fabric fabric. The idea is to provide a panel.

Reviewing the technical content of Patent Document 2, one aspect of the present invention includes preparing a precursor solution by mixing two or more metal precursors and a chelating agent with a solvent, adding a base to the precursor solution, and adjusting the pH to 8 to 10. Preparing a gel-like catalyst solution by adjusting and heating, coating the catalyst on the basalt fiber sheet by applying and drying the catalyst solution on the basalt fiber sheet, chemically applying a catalyst to the surface of the basalt fiber sheet coated with the catalyst. The present invention provides a method for manufacturing a composite material, including growing carbon nanotubes using vapor deposition and alternately stacking and pressing the basalt fiber sheets and the adhesive resin.

In the case of Patent Document 1 and Patent Document 2, adhesive is applied to both sides of a fabric woven from basalt fiber yarn, and then the desired processing is performed. Patent Document 2 also alternately laminates sheets of basalt fiber and adhesive resin. Composite materials are manufactured through pressurization.

Therefore, in the case of Patent Document 1 and Patent Document 2, it is necessary to first go through the process of weaving a fabric with basalt fiber yarn. In the case of basalt fiber yarn, the strength is high but the elongation is low, so during the weaving process, the fabric is made of several strands of fine filament yarn. Partial breakage of the basalt fiber yarn occurs, which makes weaving difficult.

In addition, fabrics woven from basalt fiber yarns had disadvantages such as not only not having a good touch, but also significantly reducing elongation, which limited the range of application of the fabric.

Therefore, in the case of basalt fiber yarn, due to its characteristics, there is a difference in the uniformity of the filament fiber yarn wound for each cone. Not only does the dissolution rate vary due to the difference in uniformity, but also the fine filament yarn with low elongation is partially cut during the dissolution process ( There were difficulties in the weaving process due to bleeding, and there were also difficulties in coating the outer surface of the basalt fiber yarn with the desired resin to give it a function.

Patent No. 1268929 “Manufacturing method and high-strength panel of basalt uneven fabric using basalt fiber yarn” Patent No. 10-2018519 “Basalt fiber composite material and manufacturing method thereof”

The present invention relates to a method of manufacturing flame-retardant resin-coated basalt fiber yarn to supplement the flame retardancy and strength of the outer surface of the basalt fiber yarn, which is excellent in flame retardancy and strength, but has significantly low elongation, and to reinforce the insufficient elongation. In particular, the outer surface of the basalt fiber yarn is flame retardant. When coating resin, a smooth resin coating can be achieved through a pretreatment process, and the manufactured flame-retardant resin-coated basalt fiber yarn is used to weave or is cut into pellets and then used in various ways using the thermoplasticity of the flame-retardant resin. This makes it possible to manufacture flame retardant sheets for this purpose.

As a means to solve the above problem, the present invention applies a volatile solvent to the basalt fiber yarn before coating it with a flame retardant resin, thereby concentrating the bulky multi-stranded filament yarn to reduce resistance to friction. , Damage to the filament yarn is minimized, but the volatile solvent is volatilized in full just before the flame retardant resin coating, so that uniform and smooth coating can be achieved. The basalt fiber yarn coated with the flame retardant resin is cooled through the first and second cooling tanks. , flame-retardant resin-coated basalt fiber yarn is manufactured by drying it through the first and second drying rooms and then winding it on a bobbin in the winding section.

The present invention applies a volatile solvent to the basalt fiber yarn before coating it with a flame retardant resin, thereby concentrating the bulky multi-strand filament yarn to reduce friction resistance and minimize damage to the filament yarn. The entire amount of the solvent is volatilized just before the flame retardant resin coating to ensure uniform and smooth coating, and the basalt fiber yarn coated with the flame retardant resin is cooled through the first and second cooling tanks and dried through the first and second drying rooms. In the next winding section, flame-retardant resin-coated basalt fiber yarn is manufactured as a means of winding it onto a bobbin, and the manufactured flame-retardant resin-coated basalt fiber yarn is woven or cut into pellets, and then various types of fibers are used using the thermoplasticity of the flame-retardant resin. It has effects such as making it possible to manufacture flame retardant sheets for other purposes.

Figure 1: Process diagram of the present invention
Figure 2: Schematic diagram of the coating device of the present invention
Figure 3: Schematic diagram of the volatile solvent application device of the present invention
Figure 4: Schematic diagram of the primary drying room of the present invention
Figure 5: Schematic diagram of the secondary drying room of the present invention

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

Basalt fiber yarn is a fiber extracted directly from basalt, and its commercialization is progressing mainly in the field of high-performance fibers dominated by glass fiber and carbon fiber, and its application in various industrial fields is gradually increasing based on its excellent heat resistance and flame retardancy.

However, due to the nature of the basalt fiber yarn, although it has excellent strength, it has the disadvantage of being significantly low in elongation. Therefore, in the present invention, the outer surface of the basalt fiber yarn is coated with a flame retardant resin to compensate for the insufficient elongation and provide heat bonding properties between the basalt fiber yarns so that they can be used for various purposes. It was made possible.

Another purpose is to make the flame-retardant resin coating process easier by pre-treating it before resin coating in order to enable the flame-retardant resin to be coated smoothly on the outer surface of the basalt fiber yarn.

The flame-retardant resin-coated basalt fiber yarn (20-1) to be manufactured in the present invention is manufactured as follows.

The process of coating the basalt fiber yarn 20 with a flame retardant resin is to apply a volatile solvent in the pre-treatment process to the basalt fiber yarn 20 moving to the coating unit, so that several strands of the filament yarn are concentrated together, but the entire amount is volatilized before coating. This ensures smooth coating, and then the flame-retardant resin is coated, cooled, dried, and then wound in the winding section (S6).

The basalt fiber yarn (20) used in the invention is purchased from a yarn manufacturer and wound on a bobbin (21), but is selected according to the purpose and use among yarns with a thickness of 100 to 1000 d (denier) made of several strands of filament yarn. do.

In the examples of the invention, basalt fiber yarn (20) with a thickness of 300d (denier) was used.

In the case of the basalt fiber yarn 20, since several strands of filament yarns are simply braided without twisting, even if a certain tension is applied, the individual filament yarns are not gathered together, and are in a bulky state, that is, many voids are formed between the filament yarns. state, and in this state, the outer surface of the basalt fiber yarn 20 cannot be smoothly coated.

Therefore, several strands of the bulky basalt fiber yarn 20 are collected using the cohesiveness of the volatile solvent, but the volatile solvent should not remain in the basalt fiber yarn 20 immediately before coating.

In the embodiments of the invention, volatile oil (also called “corn oil” in the related industry) was used as a volatile solvent.

When the volatile oil, that is, the volatile solvent, is applied to the basalt fiber yarn 20, each filament yarn is concentrated to minimize voids, and the process of moving for flame-retardant resin coating is carried out, and when it enters the die of the extruder maintained at a high temperature, The volatile solvent volatilizes from the basalt fiber yarn 20 due to high heat, but the multifilament yarn maintains a focused state and is simultaneously coated with the flame retardant resin 42.

As described above, in the present invention, a volatile solvent is applied to the basalt fiber yarn 20 before coating to focus the bulky filament yarns of several strands to minimize voids, and the volatile solvent is volatilized immediately before coating, thereby forming an outer surface of the basalt fiber yarn. Smooth coating of the flame retardant resin is achieved.

The flame retardant resin used above is made of any one of PVC, PP, PET, and TPU.

When used, phosphorus-based flame retardants, which are eco-friendly flame retardants, plasticizers, and other additives are mixed into the material.

Once the coating of flame retardant resin on the outer surface of the basalt fiber yarn is completed, primary cooling and secondary cooling are performed using water cooling. The cooled basalt fiber yarn is dried again through primary drying and secondary drying, and the dried flame retardant resin coated basalt fiber yarn is By winding it in the winding unit, the production of the flame-retardant resin-coated basalt fiber yarn (20-1) is completed.

As shown in FIG. 2, the coating device 10 for manufacturing the flame-retardant resin-coated basalt fiber yarn (20-1) includes a delivery unit (S1), a pretreatment unit (S2), a coating unit (S3), and a cooling unit (S4). ), a drying section (S5), and a winding section (S6).

The sending unit (S1) sequentially withdraws the basalt fiber yarn (20) wound on the bobbin (21). The bobbin (21) is installed on a creel (not shown) so that the basalt fiber yarn (20) is preprocessed ( It is supplied to S2).

The pretreatment unit (S2) applies a volatile solvent (33) to the basalt fiber yarn (20) supplied to the coating unit (S3) to focus the several strands of filament yarns that make up the basalt fiber yarn (20) until just before coating. , a volatile solvent application device 30 of the same configuration as in FIG. 3 is used.

The volatile solvent application device (30) has a coating roller (32) installed in a volatile solvent storage tank (39), filled with volatile solvent (33), and has two flanges (31) with a thread (35) and a threaded rod (36). Insert the configured front position adjuster 34 and the threaded rod 36 of the rear position adjuster 34-1 and then fix them with a nut 37, and use the nut 37 to secure the front and rear position adjusters 34 ( Adjust the position of 34-1).

By adjusting the position of the front and rear position adjusters 34 (34-1), the contact area of the basalt fiber yarn 20 passing through the apostrophe 35 is expanded or narrowed to the basalt fiber yarn 20. The amount of volatile solvent 33 applied can be adjusted.

The coating unit (S3) is composed of an extruder 40 and a die 41, and a chip of PVC, PP, PET, or TPU, a phosphorus-based flame retardant, a plasticizer, or other additives is added to the extruder 40 and then melted. Next, it is supplied to the die 41 located in the front, and the flame retardant resin 42 is coated on the basalt fiber yarn 20 passing through the die 41.

The volatile solvent (33) applied to the basalt fiber yarn (20) in the above is volatilized by high temperature when it enters the die (41) that maintains the high temperature during the transfer process, so a flame retardant resin (42) is formed on the outer surface of the basalt fiber yarn (20). ) is not an obstacle to coating work.

The cooling unit (S4) cools the flame retardant resin (42) coated on the basalt fiber yarn (20) in the coating unit (S3) so that the flame retardant resin (42) is cooled and integrated into the outer surface of the basalt fiber yarn (20). will be.

The cooling unit (S4) is water-cooled and consists of a primary cooling tank (50-1) and a secondary cooling tank (50-2). The configuration of each cooling tank is the same as that of a general water-cooled cooling tank, so detailed description is omitted. do.

The drying unit (S5) is a step of removing and drying the remaining moisture in the water-cooled cooling process through the primary cooling tank (50-1) and the secondary cooling tank (50-2), and is the primary drying room (60-1). It consists of a second drying room (60-2).

In the primary drying room (60-1), as shown in FIG. 4, apostles (61) are installed in front and behind the primary drying box (60), and a plurality of air jets (62) are installed on the upper side to form the primary drying box (60). Compressed air is sprayed toward the flame-retardant resin-coated basalt fiber yarn (20-1) passing through the inside.

In the secondary drying room (60-2), as shown in FIG. 5, apostles (65) are installed on both sides of the secondary drying box (60'), and a first rotating roller (66) and a second rotating roller (67) are installed on the inner side. It is installed, and an air sprayer (68) is installed directly above the apostle (65) located at the rear, and compressed air is sprayed toward the flame-retardant resin-coated basalt fiber yarn (20-1) passing through the secondary drying box (60'). It was done.

The present invention is completed by sequentially winding the dried flame-retardant resin-coated basalt fiber yarn (20-1) on the bobbin (70) in the winding unit (S6).

The coating operation of the basalt fiber yarn 20 using the coating device 10 of the above configuration is as follows.

The basalt fiber yarn (20) wound on the bobbin (21) of the sending unit (S1) is withdrawn and a volatile solvent is applied to the basalt fiber yarn (20) made of multifilament yarn through the volatile solvent application device (30) of the pretreatment unit (S2). By applying (33), several strands of filament yarn are concentrated.

That is, when the basalt fiber yarn 20, which has been drawn out as shown in FIG. 3, is passed through the path 35 of the front position adjustment tool 34, it comes into contact with the application roller 32 and the solvent storage tank 39 is placed in the basalt fiber yarn 20. ) The volatile solvent 33 filled is applied.

In the process of applying the volatile solvent 33, the amount of the volatile solvent 33 applied to the basalt fiber yarn 20 is adjusted by adjusting the height of the front and rear position adjusters 34 (34-1).

That is, by loosening the nut (37) of the front and rear position adjuster (34) (34-1) fixed to the flange (31) and then lowering the front and rear position adjuster (34) (34-1), the position of the apostle (35) is changed. lowered, and therefore the area in which the basalt fiber yarn 20 passing through the application roller 32 is in contact with the application roller 32 increases, so the amount of volatile solvent 33 applied to the basalt fiber yarn 20 This increases.

In the above, the amount of volatile solvent 33 applied to the basalt fiber yarn 20 is adjusted according to the thickness of the basalt fiber yarn 20 to be coated and the number of strands of the filament yarn.

The reason why the volatile solvent is applied to the basalt fiber yarn 20 in the pretreatment unit (S2) is that the basalt fiber yarn 20 manufactured as a multifilament yarn has several strands of filament yarns braided, and is in a bulky state. By concentrating the filament yarns neatly, resistance to friction is reduced and damage is minimized, and the volatile solvent is volatilized in full just before the flame retardant resin coating to ensure smooth coating.

The basalt fiber yarn 20 coated with the volatile solvent 33 is coated with the flame retardant resin 42 in the coating portion S3.

That is, in a state where the volatile solvent 33 is applied and several strands of the filament yarn are neatly concentrated, some volatilizes during the process of moving to the coating part S3, but when it enters the inside of the die 41 installed in front of the extruder 40, the high temperature The volatile solvent 33 is almost volatilized by the die 41 heated to , and only the basalt fiber yarn 20 in a bundled state remains.

In the above state, the basalt fiber yarn 20 in which the multifilament yarns are concentrated passes through the die 41, and the flame retardant resin 42 is smoothly coated on the outer surface.

In the above coating process, the coating amount of the flame retardant resin 42 coated on the basalt fiber yarn 20 is coated at a ratio of 20 to 40% of the basalt fiber yarn and the flame retardant resin: 60 to 80% (by volume).

Flame-retardant resin-coated basalt fiber yarn (20-1) coated with flame-retardant resin (42) on the outer surface of basalt fiber yarn (20) is used in the primary cooling tank (50-1) and secondary cooling tank that constitute the cooling unit (S4). In (50-2), the flame retardant resin 42 is firmly adhered to the outer surface of the basalt fiber yarn 20 by cooling through a water-cooled cooling means.

In the above, dividing the cooling process into 1st and 2nd stages is for complete cooling.

Since moisture remains on the outer surface of the cooled flame-retardant resin-coated basalt fiber yarn (20-1), it is dried at high pressure in the first drying room (60-1) and the second drying room (60-2) configured in the drying section (S5). Sufficiently remove moisture and dry using sprayed compressed air.

As shown in FIG. 4, the primary drying room (60-1) is a process where the flame-retardant resin-coated basalt yarn (20-1) passes through the apostrophe (61) inside the primary drying box (60), and a plurality of Since the compressed air sprayed from the air spray nozzle 62 is sprayed at high pressure toward the flame-retardant resin-coated basalt fiber yarn 20-1, moisture adhering to the outer surface is almost removed.

The flame-retardant resin-coated basalt fiber yarn (20-1) from which moisture is removed in the primary drying room (60-1) is subjected to secondary drying in the secondary drying room (60-2) as shown in FIG. 5.

That is, the flame-retardant resin-coated basalt fiber yarn (20-1) supplied to the secondary drying room (60-2) passes through the secondary rotation roller (67) installed inside the secondary drying box (60') and then makes the first rotation. It is supplied to the winding unit (S6) through the roller 66 and the apostle 65 located at the rear.

In the above, the flame-retardant resin-coated basalt fiber yarn (20-1) passing through the secondary rotating roller (67) and the primary rotating roller (66) is repeated 3 to 5 times for more complete drying, and then passed through the apostrophe located at the rear. It is withdrawn to the outside through (65).

At this time, an air sprayer 68 is installed on the upper part of the secondary drying box 60', and the flame-retardant resin-coated basalt fiber yarn 20-1 is drawn out to the outside through the apostrophe 65, and the primary rotating roller 60 ) and the secondary rotating roller (67) are repeatedly rotated to completely remove any residual moisture from the flame-retardant resin-coated basalt fiber yarn (20-1) and then drawn to the winding unit (S6).

The flame-retardant resin-coated basalt fiber yarn (20-1) sufficiently dried in the drying section (S5) is sequentially wound on the bobbin (70) in the winding section (S6).

The flame-retardant resin-coated basalt fiber yarn (20-1) prepared above is used as warp and weft yarns to weave a basalt fiber fabric with flame retardant function and heat bonding properties, which can be used for various purposes.

In addition, the manufactured flame-retardant resin-coated basalt fiber yarn (20-1) is cut into pellets and then heat-compressed to produce non-woven sheets, and the sheets manufactured above are used for various purposes requiring flame retardancy. It can be applied to products.

As described above, flame retardant resin is coated on the outer surface of the basalt fiber yarn to improve touch and elongation, which are weak points of basalt fiber. In addition, when heat-compressed, it is heat bonded through the action of flame retardant resin, so fire curtains or blinds that require flame retardancy. It can be used for various purposes such as flooring.

(S1)--Transmission section (S2)--Preprocessing section
(S3)--coating part (S4)--cooling part
(S5)--Drying section (S6)--Winding section
(10)--Coating device (20)--Basalt fiber yarn
(20-1)--Flame retardant resin coated basalt fiber yarn
(21)--Bobbin (30)--Volatile solvent application device
(31)--Flange (32)--Applying roller
(33)--Volatile solvent (34)--Front position adjuster
(34-1)--Rear position adjustment device (35)--Apostle
(36)--Threaded rod (37)--Nut
(39)--Solvent storage tank (40)--Extruder
(41)--Dice (42)--Flame retardant resin
(60)--1st drying box (60')--2nd drying box
(60-1)--1st drying room (60-2)--2nd drying room
(61)--Apostle (62)--Air jet
(65)--Apostle (66)--First rotating roller
(67)--2nd rotating roller (68)--air sprayer
(70)--Bobbin

Claims (3)

The basalt fiber yarn wound on the bobbin of the sending unit is taken out, and flame-retardant resin is coated on the outer surface of the basalt fiber yarn through a die configured in the extruder of the coating unit, to obtain flame-retardant resin-coated basalt fiber yarn, and the flame-retardant resin-coated basalt fiber yarn is cooled. A method of manufacturing flame-retardant resin-coated basalt fiber yarn in which the flame-retardant resin is integrally fixed to the outer surface of the basalt fiber yarn by cooling in the section, drying the cooled flame-retardant resin-coated basalt fiber yarn in the drying section, and then winding it on the winding port in the winding section. In this case, a pre-processing unit is formed between the sending unit and the coating unit, and in the pre-processing unit, a volatile solvent is applied to the basalt fiber yarn made of several strands of filament yarn to focus the bulky multi-strand filament yarn to increase resistance to friction. In order to reduce and minimize damage, the volatile solvent applied to the basalt fibers is completely volatilized in the die heated to a high temperature in the extruder of the coating section, so that only the basalt fibers in the bundled state remain, and the basalt fibers in the bundled state remain. As the fiber yarn passes through the die, the flame retardant resin coated on the outer surface of the basalt fiber yarn is uniformly and smoothly coated, and the coating amount of the flame retardant resin coated on the outer surface of the basalt fiber yarn is 20 to 40% of the basalt fiber yarn: flame retardant resin 60%. A method of manufacturing flame-retardant resin-coated basalt fiber yarn, characterized in that it is coated and manufactured at a rate of ~80% (by volume). delete delete

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