KR102657915B1 - Anti-vibration material using carbon fiber and its manufacturing method - Google Patents

Abstract

The present invention relates to a dustproof material using carbon fiber and a method of manufacturing the same, comprising a carbon fiber layer made of carbon fiber woven material and a dustproof layer made of liquefied PU (Polyurethane) resin, wherein the carbon fiber layer and the dustproof layer are continuously laminated, and the dustproof layer is It is possible to provide a dustproof material using carbon fiber in which the layer is hardened and integrated with the carbon fiber layer.
In addition, a lamination step of sequentially stacking a carbon fiber layer, which is a carbon fiber woven material, and a vibration-proof layer, which is a liquefied PU (Polyurethane) resin, on a frame, a curing step of curing the dust-proof layer to produce a dust-proof material using carbon fiber, and a process using the carbon fiber. It is possible to provide a method of manufacturing a dustproof material using carbon fiber, which includes a finishing step of separating the dustproof material from the frame and finishing it.

Description

Anti-vibration material using carbon fiber and its manufacturing method}

The present invention relates to a dustproof material using carbon fiber and a method of manufacturing the same. More specifically, a carbon fiber woven material is applied to the carbon fiber layer, a liquefied PU (Polyurethane) resin is applied to the dustproof layer, and the carbon fiber layer and the dustproof layer are continuously laminated, The present invention relates to an anti-vibration material using carbon fiber, which is integrated as the anti-vibration layer hardens and has excellent shape restoration and high anti-vibration characteristics, and a method of manufacturing the same.

Conventionally, various parts used in fields such as automobiles, railway vehicles, home appliances, office equipment, housing equipment, or machine tools tend to generate vibration noise during operation.

Because of this, there is a problem in that the vibration sound is directly transmitted to the device, shortening the lifespan of the device.

Additionally, in recent years, there has been a need for vibration-proof or reinforcing structures that can prevent buildings or structures from being damaged by earthquakes.

In the case of buildings such as apartments, villas, houses, etc., various means are used to reduce external shocks such as earthquakes, vibrations, and internal shocks or vibrations such as inter-floor noise.

In order to reduce shock and vibration applied to a building, structure, or device, vibration isolation materials can be used between floors, floors, or parts of a building, structure, or device.

Vibration isolating materials are usually manufactured by molding natural rubber or synthetic rubber such as neoprene rubber. When installed on the floor of a building, structure, or device, the floor is formed into a double structure and then the vibration isolating material is placed between them or the building, structure, or device is made. It can be used by attaching a dustproof material to the part that is in contact with the external ground.

It is desirable that the vibration isolating material used for the purpose of blocking vibration and absorbing shock has high flexibility to quickly convert vibration energy into heat energy and dissipate it, while also having high elasticity so that the rate of permanent compression is low when used for a long time.

At this time, if the elastic force is low, it is difficult for the deformed part due to the load to return to its original state, and as a result, the effect of reducing vibration and shock is greatly reduced.

However, the elasticity and flexibility of the vibration isolating material conflict with each other, so when the elasticity of the vibration isolating material is high, the flexibility is generally lower, and when the flexibility is high, the elasticity is generally lowered.

Therefore, there is a need to develop a highly elastic yet flexible vibration isolating material that can replace existing vibration isolating materials.

The prior art includes Korean Patent No. 10-0309315, “Self-adhesive rubber-asphalt soundproofing and vibration isolating material and method of manufacturing the same.”

In order to solve the above problems, the present invention uses highly elastic yet flexible carbon fiber woven fabric and PU (Polyurethane) resin with excellent shock absorption and noise blocking effects to produce carbon fiber with excellent shape recovery and high dustproof properties. The purpose is to provide used anti-vibration materials and their manufacturing methods.

In order to solve the above problems, the dustproof material using carbon fiber according to an embodiment of the present invention may include a carbon fiber layer made of woven carbon fiber and a dustproof layer made of liquefied polyurethane (PU) resin.

Here, the carbon fiber layer and the dustproof layer may be continuously laminated, and the dustproof layer may be hardened to be integrated with the carbon fiber layer.

Additionally, the dustproof material using carbon fiber may further include a framework layer formed of composite fibers in a lattice pattern and laminated on the carbon fiber layer.

Here, the composite fiber may include 10 to 20 parts by weight of polyketone fiber, 10 to 20 parts by weight of leaf vein fiber, 3 to 6 parts by weight of LM (Low Melting) fiber, and 1 to 5 parts by weight of silicone rubber powder.

In addition, the dustproof material using carbon fiber is an elastic material, and has a plurality of wedge grooves inside that become narrower as they move from the middle to the upper and lower sides, a pair of air cavity grooves protruding on both sides at the middle of the wedge grooves, and an upper surface and It may further include a reinforcing layer on the lower surface having a coupling groove that becomes wider as it moves downward and upward, respectively.

Here, the reinforcing layer may be integrated as the dust-proof layer in a liquid state penetrates into the coupling groove and hardens the dust-proof layer.

Additionally, the reinforcement layer may include microbeads of carbon material filled in the wedge groove.

Here, the microbeads may move and fill the air cavity groove according to a change in the shape of the reinforcement layer.

In addition, the method of manufacturing a dustproof material using carbon fiber according to an embodiment of the present invention includes a laminating step of sequentially stacking a carbon fiber layer made of carbon fiber woven material and a dustproof layer made of liquefied PU (Polyurethane) resin on a frame, and curing the dustproof layer. It may include a curing step of creating a dustproof material using carbon fiber and a finishing step of separating the dustproof material using carbon fiber from the frame and finishing it.

Additionally, in the lamination step, a framework layer formed with a lattice pattern of composite fibers may be laminated on the carbon fiber layer.

Here, the composite fiber may include 10 to 20 parts by weight of polyketone fiber, 10 to 20 parts by weight of leaf vein fiber, 3 to 6 parts by weight of LM (Low Melting) fiber, and 1 to 5 parts by weight of silicone rubber powder.

The vibration isolator using carbon fiber and its manufacturing method according to the embodiment of the present invention as described above uses highly elastic yet flexible carbon fiber fabric and PU (Polyurethane) resin, which is excellent in shock absorption and noise blocking, and has excellent shape restoration. and can have high dustproof properties.

In addition, by applying a framework layer with a lattice pattern, uniform elasticity over the entire area can be secured and the vibration-proof material can be prevented from sagging.

In addition, by applying a reinforcing layer with an air cavity groove that can secure an air layer even after the shape is deformed, high dustproof characteristics can be maintained even when the shape is deformed by external force.

Figure 1 is a cross-sectional view showing a dustproof material using carbon fiber according to an embodiment of the present invention.
Figure 2 is a perspective view showing a framework layer formed in a dustproof material using carbon fiber according to an embodiment of the present invention.
Figure 3 is a perspective view showing the skeleton layer of Figure 2.
Figure 4 is a cross-sectional view showing a reinforcement layer formed in a dustproof material using carbon fiber according to an embodiment of the present invention.
Figure 5 is a cross-sectional view showing the reinforcement layer of Figure 4.
Figures 6 (a) and (b) are exemplary diagrams showing the shape of the reinforcement layer in Figure 4 being deformed.
Figure 7 is a cross-sectional view showing the microbeads in Figure 5.
Figure 8 is a flow chart schematically showing a method of manufacturing a dustproof material using carbon fiber according to an embodiment of the present invention.

Since the present invention can be subject to various changes and can have various forms, specific embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the existence of a combination of features, numbers, steps, components, etc. described in the specification, but are not limited to one or more other features or numbers, It should be understood that the existence or addition possibility of combinations of steps, components, etc. is not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Here, repeated descriptions, known functions that may unnecessarily obscure the gist of the present invention, and detailed descriptions of configurations are omitted. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 8.

First, the vibration isolating material (hereinafter abbreviated as 'vibration isolating material') using carbon fiber according to an embodiment of the present invention will be described below based on the attached FIGS. 1 to 7.

Figure 1 is a cross-sectional view showing a dustproof material using carbon fiber according to an embodiment of the present invention.

The dustproof material 1 according to an embodiment of the present invention is a dustproof material 1 that not only has excellent shape restoration and high dustproof characteristics when used in various fields such as buildings, structures, or devices, but also has the property of effectively blocking noise.

Referring to FIG. 1, the dustproof material 1 may include a carbon fiber layer 100 and a dustproof layer 200.

Specifically, the dustproof material 1 may be formed by disposing the dustproof layer 200 between a pair of carbon fiber layers 100.

In addition, the dustproof material 1 preferably has a carbon fiber layer 100 formed at the bottom and top, but is not limited to this.

The carbon fiber layer 100 may be a carbon fiber woven material.

Specifically, the carbon fiber layer 100 is a plant. It may be a pitch-based carbon fiber fabric produced using pitch manufactured through petroleum and coal tar.

The carbon fiber layer 100 may have an elastic modulus of 700 GPa or more and 800 GPa or less, and a tensile strength of 3000 MPa or more and 4000 MPa or less, that is, a high elastic modulus and excellent tensile strength.

Accordingly, the carbon fiber layer 100 can absorb vibration with high elasticity and exhibit anti-vibration characteristics, and can withstand external force (EF) with excellent tensile strength.

The dustproof layer 200 may be liquefied polyurethane (PU) resin.

At this time, the dustproof layer 200 is made of liquefied PU resin in a liquid state, not a solid state, laminated on the carbon fiber layer 100, so that a part of the liquefied PU resin may permeate into the carbon fiber layer 100.

Thereafter, the dustproof layer 200 may have a predetermined thickness and be cured to have a high elastic modulus of the cured PU resin itself.

In addition, the dustproof layer 200 is made of hardened PU resin and has elastic memory properties, so when the external force (EF) disappears, the restoration force to return to its original form can be increased.

The carbon fiber layer 100 and the dustproof layer 200 may be continuously laminated and the dustproof layer 200 may be hardened to be integrated.

Specifically, the carbon fiber layer 100 and the dustproof layer 200 are put into a frame of the shape requested by the user, and a portion of the dustproof layer 200, which is a liquefied PU resin, may permeate into the carbon fiber layer 100.

At this time, the dustproof layer 200 may be added to have a predetermined thickness.

Thereafter, the carbon fiber layer 100 and the dustproof layer 200 are bonded together and the dustproof layer 200 is hardened to form the dustproof material 1.

Accordingly, the vibration isolation material 1 can absorb vibration due to the high elastic modulus of the carbon fiber layer 100 and the vibration isolation layer 200, and can have excellent restoring force.

Figure 2 is a perspective view showing a framework layer formed in a dustproof material using carbon fiber according to an embodiment of the present invention, and Figure 3 is a perspective view showing the framework layer of Figure 2.

Referring to FIG. 2, the dustproof material 1 according to an embodiment of the present invention may further include a framework layer 300.

The framework layer 300 is a layer that has elasticity and strength to maintain its shape, is made of composite fibers, and can be formed in a lattice pattern and laminated on the carbon fiber layer 100.

Specifically, referring to FIG. 3, the framework layer 300 may be formed in a size corresponding to the carbon fiber layer 100, and may be formed in a grid pattern at regular intervals and shapes.

At this time, the dustproof layer 200 of the liquefied PU resin can be evenly infiltrated and laminated on the grid pattern of the framework layer 300.

In addition, the composite fibers used in the framework layer 300 include 10 to 20 parts by weight of polyketone fibers, 10 to 20 parts by weight of leaf vein fibers, 5 to 10 parts by weight of LM (Low Melting) fibers, and 1 to 5 parts by weight of silicone rubber powder. can be formed.

Polyketone fiber is a polymer fiber made from carbon monoxide and olefins such as ethylene and propylene.

Polyketone fibers manufactured in this way are made of rubber using low-density olefins such as elastomers, which are ultra-low-density olefins of 0.885 g/cm ³ or less, or plastomers, which are polyolefins between 0.885 g/cm ³ and 0.915 g/cm ³ . It can have a similar degree of elasticity.

In addition, polyketone fibers themselves can have excellent impact resistance, chemical resistance, and abrasion resistance.

However, polyketone fibers have a problem in which physical properties deteriorate due to long-term heat resistance and aging.

In addition, in order to apply polyketone fiber to other fibers, the fiber itself has limitations in adhesiveness, so it is necessary to impart wettability and adhesiveness to the surface.

If these polyketone fibers are mixed in less than 10 parts by weight, the elasticity and basic physical properties of the framework layer 300 may deteriorate, and if they are mixed in more than 20 parts by weight, physical properties may deteriorate due to aging due to heat resistance during long-term use. Also, cracks may occur due to decreased adhesion of composite fibers.

In addition, the polyketone fiber preferably has a thickness of 10 to 50㎛.

At this time, if the polyketone fiber is formed with a thickness of less than 10㎛, it may not exhibit sufficient basic properties such as elasticity, abrasion resistance, and chemical resistance, and if it is more than 50㎛, bonding with other fibers is incomplete and the framework layer 300 The form may not be achieved.

Vein fiber is a natural fiber made from the leaves of plants.

For example, leaf vein fibers include abaca, sisal hemp, and pineapple fiber.

Specifically, leaf vein fiber uses the stem of a plant's leaf, that is, the leaf vasculature, so the fiber is hard and can be processed in various ways, so it can be processed into very thin sizes.

Here, it is preferable to process the leaf vein fibers to a thickness of 15 to 50㎛ and adhere them so as to surround the polyketone fibers in several layers.

At this time, if the leaf vein fiber is formed with a thickness of less than 15㎛, it may not form a framework and may be broken or unable to maintain its shape. If it is formed with a thickness of more than 50㎛, the basic physical properties such as elasticity, impact resistance, and chemical resistance of polyketone fiber can deteriorate.

In addition, leaf vein fibers have excellent hygroscopicity, so adhesion of LM fibers can be easily achieved.

Accordingly, the leaf vein fibers have adhesive properties and can be easily applied to polyketone fibers, thereby forming the framework of the framework layer 300.

LM fiber is a fiber made from polyester, and is an eco-friendly fiber with a low melting point and excellent adhesiveness.

Specifically, LM fibers can be placed between polyketone fibers and leaf vein fibers to provide adhesiveness, thereby bonding the polyketone fibers and leaf vein fibers.

Accordingly, the LM fiber can be integrated while maintaining the elasticity of the polyketone fiber and the hardness of the leaf vein fiber.

If these LM fibers are mixed in less than 5 parts by weight, cracks may occur in the framework layer 300 due to reduced adhesion between the polyketone fibers and leaf vein fibers, and if mixed in more than 10 parts by weight, the basic properties of the polyketone fibers and leaf vein fibers The physical properties may be impaired and the degree of adhesion may become weaker.

Silicone rubber powder is a fine powder of silicone rubber containing polydimethylsiloxane.

Specifically, silicone rubber powder is coated on polyketone fibers and leaf vein fibers that are integrated by bonding with LM fibers using a powder coating method to provide surface smoothness to the framework layer 300 and further improve resilience.

Here, the powder coating method is a method of forming a coating film by using dried fine powder as a paint, adhering the fine powder paint to the object to be coated, and then curing it.

If this silicone rubber powder is mixed in less than 1 part by weight, the surface smoothness of the framework layer 300 may decrease, and if it is mixed in more than 5 parts by weight, the coating film becomes thick and the basic physical properties of the polyketone fiber and leaf vein fiber are damaged. You can.

The framework layer 300 formed in this way can absorb vibration by securing uniform elasticity over the entire area of the vibration isolator 1 and prevent the phenomenon of turning off.

Figure 4 is a cross-sectional view showing a reinforcing layer formed in a dustproof material using carbon fiber according to an embodiment of the present invention, Figure 5 is a cross-sectional view showing the reinforcing layer of Figure 4, and Figures 6 (a) and (b) Figure 4 is an example diagram showing the shape of the reinforcing layer being deformed, and Figure 7 is a cross-sectional view showing the shape of Figure 5 filled with microbeads.

Referring to FIG. 4, the vibration isolator 1 according to an embodiment of the present invention may further include a reinforcement layer 400.

The reinforcement layer 400 may be formed between the dustproof layers 200.

Specifically, the reinforcement layer 400 may have a dustproof layer 200 formed on the upper and lower surfaces, and a carbon fiber layer 100 may be formed on each dustproof layer.

Additionally, the reinforcing layer 400 is preferably formed to have a thickness less than or equal to the total thickness of the dustproof layer 200.

Referring to Figure 5, the reinforcement layer 400 is formed of an elastic material, and a wedge groove 410, an air cavity groove 420, and a coupling groove 430 may be formed.

Here, silicone, rubber, etc. may be used as the elastic material.

Accordingly, when an external force (EF) is applied to the reinforcement layer 400, a Poisson effect (PE) may appear.

Here, the Poisson effect (PE) refers to the property of expanding in two directions perpendicular to the applied external force (EF) when an external force (EF) is applied to the object.

The wedge groove 410 may be made of an elastic material and may be formed inside in a shape that becomes narrower as it moves from the middle to the upper and lower sides.

Specifically, the wedge groove 410 may form an air layer inside.

At this time, since an air layer is formed inside the wedge groove 410, vibration energy may be attenuated due to friction with the air layer.

The air cavity groove 420 may protrude on both sides of the middle of the wedge groove 410.

Specifically, when the wedge groove 410 is narrowed inward due to the Poisson effect (PE) that occurs when an external force (EF) is applied to the dustproof material (1), the air cavity grooves (420) on both sides are ) may be connected.

Accordingly, the air cavity groove 420 can maintain an air layer and attenuate vibration even when an external force (EF), such as an object being placed on the vibration isolator 1, is applied.

The coupling groove 430 may be formed on the upper and lower surfaces in a shape that becomes wider as it moves downward and upward, respectively.

Specifically, the coupling groove 430 can be combined with the dustproof layer 200 in a liquid state, that is, the liquefied PU resin penetrates into the shape of the coupling groove 430, and then the dustproof layer 200 is hardened.

In addition, the coupling groove 430 is formed in a shape that becomes wider as it moves downward and upward, respectively, so that it can be more stably coupled to the dustproof layer 200.

To summarize the shape deformation of the reinforcing layer 400 with reference to (a) and (b) of FIG. 6, (a) is a state in which an external force (EF) is applied to the reinforcing layer (1).

At this time, although an air layer is formed in the wedge groove 410, it can be confirmed that the wedge groove 410 receives a force inward due to the Poisson effect (PE).

In addition, (b) of FIG. 6 shows a state in which, in the state of (a), the external force (EF) is continuously applied to the reinforcement layer 400 and the wedge groove 410 is narrowed due to the Poisson effect (PE), thereby reducing the air layer.

At this time, it can be confirmed that the air cavity groove 420 is in a communicating state and maintains an air layer.

The reinforcing layer 400 can increase vibration isolation characteristics by attenuating vibration energy, and maintain high vibration isolation characteristics by securing an air layer even when an external force is applied.

Referring to FIG. 7, the reinforcement layer 400 may include microbeads 440 made of carbon material filled in the wedge groove 410.

By being formed of a carbon material, the microbeads 440 can have a high elastic modulus and excellent tensile strength.

In addition, the microbeads 440 absorb vibration due to material characteristics inside the wedge groove 410, and can attenuate vibration energy while moving due to vibration.

In addition, even if the wedge groove 410 is narrowed by an external force, the microbeads 440 can move and fill the air cavity groove 420 where an air layer is secured.

Accordingly, the microbeads 440 can absorb vibration and attenuate vibration energy even when the shape of the reinforcement layer 400 is deformed.

Hereinafter, the present invention will be described in more detail through examples.

However, the following examples only illustrate the present invention, and the content of the present invention is not limited by the following examples.

[Example 1]

A dustproof material was manufactured by sequentially stacking a carbon fiber layer, which is a carbon fiber woven material, and a dustproof layer, which is liquefied polyurethane (PU), and curing the dustproof layer.

At this time, the carbon fiber layer was formed of carbon fiber woven material with an elastic modulus of 750 GPa and a tensile strength of 3500 MPa, and was placed at the bottom and top.

[Example 2]

An anti-vibration material was manufactured in the same manner as in Example 1, except that it further included a framework layer laminated on the carbon fiber layer and into which the anti-vibration layer was infiltrated between the grid patterns.

At this time, the framework layer was made of composite fibers, and the composite fibers were made of 15 parts by weight of polyketone fibers with a thickness of 15㎛, 15 parts by weight of leaf vein fibers with a thickness of 20㎛, 8 parts by weight of LM fibers, and 3 parts by weight of silicone rubber powder.

[Example 3]

An anti-vibration material was manufactured in the same manner as in Example 1, except that a reinforcing layer was further included between the anti-vibration layers.

At this time, the reinforcing layer was made of silicon, and a dustproof layer was disposed on the upper and lower surfaces, and was formed to a thickness of 2/3 of the total thickness of the dustproof layer.

[Example 4]

A dustproof material was manufactured in the same manner as in Example 4, except that the reinforcement layer was filled with microbeads.

At this time, the microbeads were made of carbon material.

[Comparative Example 1]

Among the vibration isolators sold on the market, those made of natural rubber were randomly selected.

[Comparative Example 2]

Among the commercially available vibration isolators, those made of cork were randomly selected.

[Comparative Example 3]

A dustproof material was manufactured in the same manner as in Example 2, except for the material content of the composite fibers forming the framework layer.

At this time, the composite fiber was manufactured from 8 parts by weight of polyketone fiber with a thickness of 15㎛, 8 parts by weight of leaf vein fiber with a thickness of 20㎛, 1 part by weight of LM fiber, and 0.5 part by weight of silicone rubber powder.

[Comparative Example 4]

An anti-vibration material was manufactured in the same manner as in Example 3, except that a reinforcing layer was further included between the anti-vibration layers.

At this time, the reinforcement layer was made of silicon, and a dustproof layer was disposed on the upper and lower surfaces, and was formed to be twice as thick as the total thickness of the dustproof layer.

[Experimental Example 1] Evaluation of dustproof performance of dustproof materials

The vibration-proof performance of the dust-proof material was evaluated using a dust-proof performance evaluation device consisting of a harmonic signal analyzer, a signal amplifier, an accelerometer sensor, a diaphragm made of PEI (polyetherimide), and an impact hammer.

The anti-vibration materials of Examples 1 to 4 and Comparative Examples 1 to 4 were prepared by cutting them to the same size, and the anti-vibration performance was evaluated by generating vibration of the same intensity using a vibration-proof performance evaluation device.

The vibration isolation performance was confirmed by converting the degree of vibration attenuation into a percentage.

The results are shown in Table 1.

Dustproof performance (%) Dustproof performance (%) Example 1 96.3 Comparison example 1 89.1 Example 2 97.4 Comparison example 2 88.4 Example 3 97.9 Comparison example 3 92.2 Example 4 98.2 Comparison example 4 97.8

As shown in Table 1, it can be confirmed that Examples 1 to 4, Comparative Examples 3 and 4 of the present invention have better dustproof performance than Comparative Examples 1 and 2 available on the market.

In addition, it can be confirmed that Example 2, in which a framework layer was added, and Example 3 and Example 4, in which a reinforcement layer was added, had better dustproof performance than Example 1.

In addition, it can be confirmed that when microbeads were formed in the reinforcement layer as in Example 4, the dustproof performance was somewhat superior to Example 3 in which microbeads were not formed.

Meanwhile, in the case of Comparative Example 3, the dustproof performance was significantly lower than that of Examples 1 and 2, confirming that the dustproof performance varies depending on the material composition of the composite fibers forming the skeleton layer.

In addition, in the case of Comparative Example 4, it can be seen that there is almost no difference in dustproof performance from Example 3, so it can be confirmed that the thickness of the reinforcing layer has little relation to dustproof performance.

[Experimental Example 2] Evaluation of resilience of dustproof materials

The resilience of the dustproof material was evaluated through the residual indentation rate according to the test method of KS M 3802.

The vibration isolators of Examples 1 to 4 and Comparative Examples 1 to 4 were prepared by cutting them to the same size, and a load of 222 N was applied for 5 minutes using a steel plate of the same size as the vibration isolator.

After removing the load, the indentation amount was read through a dial gauge 60 minutes later, and the residual indentation rate was calculated based on the thickness of the vibration isolator before the test and the indentation amount after the test, and then converted to a percentage to confirm.

If the residual indentation rate is low, pressure remains in the dustproof material, causing unevenness, and the restoring force may be judged to be good. If the residual indentation rate is high, the restoring force may be judged to be poor.

The results are shown in Table 2.

Residual indentation rate (%) Residual indentation rate (%) Example 1 1.9 Comparison example 1 3.8 Example 2 1.3 Comparison example 2 5.5 Example 3 2.2 Comparison example 3 3.6 Example 4 2.1 Comparison example 4 3.4

As shown in Table 1, it can be confirmed that Examples 1 to 4 have better dustproof performance than Comparative Examples 1 and 2, which are commercially available.

In addition, it can be seen that Example 2, in which the framework layer was added, had better residual indentation rate, that is, restoration force, than Examples 1, 3, and 4.

In addition, it can be confirmed that although Examples 3 and 4 had lower resilience than Example 1, there was no significant difference.

Meanwhile, in the case of Comparative Example 3, the restoring force was significantly lower than that of Examples 1 and 2, confirming that the restoring force varies depending on the material composition of the composite fibers forming the skeleton layer.

In addition, in the case of Comparative Example 4, the restoring force was significantly lower than that of Examples 1 and 3. As there was almost no difference, it can be confirmed that the restoring force varies depending on the thickness of the reinforcing layer.

Next, a method for manufacturing a vibration isolator using carbon fiber according to an embodiment of the present invention (hereinafter abbreviated as 'method for manufacturing a dustproof material') will be described below based on the attached FIG. 8.

Figure 8 is a flow chart schematically showing a method of manufacturing a dustproof material using carbon fiber according to an embodiment of the present invention.

The method of manufacturing a dustproof material according to an embodiment of the present invention is a method of manufacturing a dustproof material (1). It is used in various fields such as buildings, structures, or devices using carbon fiber fabric and liquefied PU (Polyurethane) resin, and has excellent shape recovery. It is possible to manufacture a dust-proof material (1) that not only has high dust-proof properties but also has properties that effectively block noise.

Here, the vibration isolating material 1 is substantially the same as the vibration isolating material 1 described above.

Referring to FIG. 8, the method of manufacturing a dustproof material may include a lamination step (S10), a curing step (S20), and a finishing step (S30).

The stacking step (S10) is a step of continuously stacking a carbon fiber layer 100, which is a carbon fiber woven material, and a dustproof layer 200, which is a liquefied polyurethane (PU) resin, on a frame.

At this time, in the stacking step (S10), it is preferable that the carbon fiber layer 100 is added first and last and disposed at the bottom and top of the dustproof material 1, but is not limited to this.

In addition, in the lamination step (S10), the dustproof layer 200 must be injected into the mold as a liquefied PU resin in a liquid state.

Additionally, in the stacking step (S10), the dustproof layer 200, which is a liquefied PU resin, is stacked on the carbon fiber layer 100, and a portion of the dustproof layer 200 may permeate into the carbon fiber layer 100.

The curing step (S20) is a step of curing the dustproof layer 200 to produce the dustproof material 1.

Specifically, in the curing step (S20), the dustproof layer 200 that has partially permeated in the lamination step (S10) is hardened, and the carbon fiber layer 100 and the dustproof layer 200 may be integrated.

The finishing step (S30) is a step in which the dustproof material (1) is separated from the frame and finished.

Afterwards, the dustproof material 1 can be cut and used according to the user's request.

In the previously described lamination step (S10), a framework layer 300 formed with a lattice pattern of composite fibers may be laminated on the carbon fiber layer 100.

At this time, in the stacking step (S10), it is preferable that the framework layer 300 is stacked first, but it is not limited to this.

Specifically, in the lamination step (S10), when the framework layer 300 is first laminated on the carbon fiber layer 100, the dustproof layer 200, which is a liquefied PU resin, is formed by the framework layer 300 being laminated on the carbon fiber layer 100. After being put into the mold, it can be evenly penetrated and laminated into the grid pattern of the framework layer 300.

On the contrary, in the lamination step (S10), when the dustproof layer 200 is first laminated on the carbon fiber layer 100, the dustproof layer 200 first introduced into the grid pattern of the framework layer 300 penetrates into the framework layer 300. Can be laminated on the carbon fiber layer 100 due to gravity.

Additionally, a reinforcement layer 400 may be formed on the dustproof layer 200 in the stacking step (S10).

Specifically, in the stacking step (S10), after the carbon fiber layer 100 is put in, the dustproof layer 200 is first put and laminated, and then the reinforcing layer 400 is put and stacked on top of it, and then the dustproof layer 200 is put in again. By stacking, the reinforcing layer 400 can be formed between the dustproof layers 200.

At this time, in the lamination step (S10), the dustproof layer 200, which is a liquefied PU resin, may be penetrated according to the shape of the coupling groove 430 of the reinforcement layer 400.

Thereafter, as the curing step (S20) progresses, a portion of the dustproof layer 200 penetrates into the coupling groove 430 and hardens, so that the dustproof layer 200 and the reinforcement layer 400 can be stably coupled.

As above, specific parts of the content of the present invention have been described in detail, and for those skilled in the art, it is clear that these specific techniques are merely preferred embodiments and do not limit the scope of the present invention. It will be obvious. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

1: Dustproof material
100: carbon fiber layer
200: dustproof layer
300: Skeleton layer
400: Reinforcement layer
410: wedge groove
420: Air cavity groove
430: defect groove
440: Fine beads
EF: external force
PE: Poisson effect

Claims (8)

A carbon fiber layer, which is a carbon fiber woven material;
A dustproof layer made of liquefied PU (Polyurethane) resin and
It is made of elastic material and has a plurality of wedge grooves inside that become narrower as they move from the middle to the top and bottom, a pair of air cavity grooves protruding on both sides at the middle of the wedge grooves, and a pair of air cavity grooves on the upper and lower surfaces, respectively, as they move toward the bottom and top. It includes a reinforcing layer in which a widening coupling groove is formed,
The carbon fiber layer and the dustproof layer are continuously laminated, and the dustproof layer is hardened and integrated with the carbon fiber layer,
The reinforcement layer is,
A dustproof material using carbon fiber, characterized in that the dustproof layer in a liquid state penetrates into the coupling groove and is integrated as the dustproof layer hardens.
delete delete delete According to clause 1,
The reinforcement layer is,
It includes microbeads of carbon material filled in the wedge groove,
The microbeads are,
A dustproof material using carbon fiber, characterized in that the air cavity groove is moved and filled according to a change in the shape of the reinforcement layer.
A lamination step of successively stacking a carbon fiber layer made of carbon fiber fabric and a dustproof layer made of liquefied PU (Polyurethane) resin on a frame;
A curing step of curing the dustproof layer to produce a dustproof material using carbon fiber, and
It includes a finishing step of separating the dustproof material using the carbon fiber from the frame and finishing it,
The lamination step is,
A framework layer formed with a lattice pattern of composite fibers is laminated on the carbon fiber layer,
The composite fiber is,
A method of manufacturing a dustproof material using carbon fiber comprising 10 to 20 parts by weight of polyketone fiber, 10 to 20 parts by weight of leaf vein fiber, 3 to 6 parts by weight of LM (Low Melting) fiber, and 1 to 5 parts by weight of silicone rubber powder.
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