KR20170080970A - Laminatied Structures Of Fiber Reinforced Composite Material And Manufacturing Method Of The Same - Google Patents

Laminatied Structures Of Fiber Reinforced Composite Material And Manufacturing Method Of The Same Download PDF

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KR20170080970A
KR20170080970A KR1020150191154A KR20150191154A KR20170080970A KR 20170080970 A KR20170080970 A KR 20170080970A KR 1020150191154 A KR1020150191154 A KR 1020150191154A KR 20150191154 A KR20150191154 A KR 20150191154A KR 20170080970 A KR20170080970 A KR 20170080970A
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South Korea
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fiber
composite material
reinforced composite
press
melting
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KR1020150191154A
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Korean (ko)
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길형배
박은하
김종한
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코오롱플라스틱 주식회사
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Priority to KR1020150191154A priority Critical patent/KR20170080970A/en
Publication of KR20170080970A publication Critical patent/KR20170080970A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0038—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving application of liquid to the layers prior to lamination, e.g. wet laminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/045—Slitting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/08—Reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/02—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/12—Pressure

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

(S1) simultaneously injecting two or more fiber-reinforced composites into a laminated state at an angle calculated according to the lamination pattern; (S2) passing the two or more fiber-reinforced composite materials stacked in the laminated state in the step (S1) through the press apparatus unit 100 provided with the first belt press and the second belt press, and melting and compressing the same; (S3) passing the primary melted fiber-reinforced composite material layer through the local melting apparatus unit 200 and partially melting the same; (S4) passing the partially melted fiber-reinforced composite material laminate through a molding apparatus unit 300 equipped with a molding press, and bending and compressing the partially melted fiber-reinforced composite material laminate in a structure form; And (S5) cutting the fiber-reinforced composite material laminate folded and compression-molded in the form of the structure into a structure length, and a fiber-reinforced composite material laminate structure produced thereby .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a laminated structure of a fiber-reinforced composite material,

The present invention relates to a laminated structure of a fiber-reinforced composite material and a method of manufacturing the same, and more particularly, to a method of manufacturing a laminated structure using a thermoplastic composite material produced by a draw-forming method.

Compostie means a material that artificially mixes or binds materials with different components and properties to maximize the properties of each material or to have new properties that are not expressed in a single material. The composites are basically excellent in strength, corrosion resistance, fatigue life, abrasion resistance, impact resistance and light weight properties compared to existing materials. Therefore, they are widely used in aerospace, sports, shipbuilding, Is a representative industrial material for the 21st century.

In general, the composite material is a reinforced material that takes charge of the load applied to the material, and a matrix that transmits the load to the reinforcement in combination with the reinforcement. As the reinforcing material, fiber reinforcing materials such as glass fiber, carbon fiber, and aramid fiber are commonly used. As the base material, thermosetting resin including phenol resin, epoxy resin, polyvinyl chloride (PVC), polyethylene, polypropylene, A resin base material such as a thermoplastic resin including polyamide, polyacetal, polybutylene terephthalate, and polyphenylene sulfide resin is widely used.

Such a composite material may be produced by pultrusion in which a fiber yarn is impregnated with a resin in a die to continuously produce a product having a predetermined shape, a reinforcing material in a woven state is supplied into a mold A resin injection molding (RTM) method in which a resin is impregnated, and a reaction injection molding (RIM) method in which a resin is directly polymerized in a mold. Among them, the drawing and RTM method is a typical manufacturing method of complicated material using thermoplastic resin, and it is possible to manufacture long-fiber reinforced thermoplastics (LFT) or one-directional tape (UD Tape, Unidrection Tape) And a plate-like composite material in the form of a single layer can be produced through the RTM method.

The conventional patent documents disclosing production of a composite material by a draw-forming method include a method in which a fiber yarn laminated through a fabric arranger is supplied and a resin is sprayed on a fiber yarn to always apply a predetermined amount of resin, Korean Patent Registration No. 10-0880805 discloses a technique for producing a composite material using a RTM method. In the prior art, a flow mesh is disposed between fiber layers to form a bent portion There is a Korean Patent Registration No. 10-1447136 which discloses a technique capable of blocking the floating phenomenon and suppressing the bubble phenomenon.

Meanwhile, the UD tape or the single-layered plate-like composite material manufactured in this way is strained by a designed pattern, and is subjected to a pressure compression molding (PCM) method in which consolidation and compaction are performed using a press, A composite sheet of a laminated structure or a member of a frame forming a framework of the structure. Ideally, through this process, the interlaminar bond strength is increased, and the inner bubbles are released to the outside to form a more dense structure, so that the desired stiffness can be effectively satisfied.

However, for the most part, the volume fraction of the internal structure of the composite material is increased during the re-melting process for remanufacturing, resulting in a decrease in the denseness of the structure, thereby deteriorating the mechanical properties of the final product Lt; / RTI > Particularly, such a problem is more likely to occur when a composite material having a large number of voids therein is used, and in particular, a composite material produced by a draw-forming process may frequently occur. Pull-out molding has high productivity and can produce products with unlimited length like UD tape. However, due to the limited high-pressure molding, resin impregnation is unlikely to be uniform and there is a limit to effectively remove air bubbles inside the material. It is because.

Accordingly, the present invention can treat lamination and forming of a fiber-reinforced composite material in a continuous process (in-line), and at the same time, even if a fiber-reinforced composite material produced by a draw-forming method is used, the internal porosity of the finally- And to provide a laminated structure of a fiber-reinforced composite material produced by the method.

According to a first embodiment of the present invention, there is provided a method of manufacturing a fiber-reinforced composite material, comprising: (S1) simultaneously injecting two or more fiber-reinforced composites into a laminated state at an angle calculated according to a lamination pattern; (S2) passing the two or more fiber-reinforced composite materials stacked in the laminated state in the step (S1) through the press apparatus unit 100 provided with the first belt press and the second belt press, and melting and compressing the same; (S3) passing the primary melted fiber-reinforced composite material layer through the local melting apparatus unit 200 and partially melting the same; (S4) passing the partially melted fiber-reinforced composite material laminate through a molding apparatus unit 300 equipped with a molding press, and bending and compressing the partially melted fiber-reinforced composite material laminate in a structure form; And (S5) cutting the fiber-reinforced composite material laminated by folding and compression-molding the fiber-reinforced composite material into a structure length.

Also, a second preferred embodiment of the present invention is a fiber reinforced composite laminate structure manufactured by the method of the first embodiment and having a porosity of 1% to 3% or less according to the ASTM D2734 measurement standard.

According to the present invention, it is possible to minimize unnecessary heat exposure to the fiber-reinforced composite material and to suppress the generation of internal voids through the pressing process, thereby providing a high-quality composite laminate structure.

In addition, the manufacturing method according to the present invention can produce the efficiency of the production process since the lamination and molding of the fiber-reinforced composite material can be performed in a continuous process (In-line).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process flow chart showing an example of a manufacturing process for producing a laminated structure of a fiber-reinforced composite material according to the present invention.
FIG. 2 is a process diagram illustrating an example of a manufacturing process for manufacturing a laminated structure of a fiber-reinforced composite material according to the present invention.
3 is a cross-sectional view showing the press apparatus unit 100 of the present invention in which a fiber-reinforced composite material is laminated and molded by temperature and pressure.
4 is a cross-sectional view showing a local melting apparatus 200 of the present invention for locally heating a laminated composite structure.
5 is a cross-sectional view of a composite molding apparatus 300 of the present invention to form a locally heated composite structure.

(S1) simultaneously injecting two or more fiber-reinforced composites into a laminated state at an angle calculated according to the lamination pattern; (S2) passing the two or more fiber-reinforced composite materials stacked in the laminated state in the step (S1) through the press apparatus unit 100 provided with the first belt press and the second belt press, and melting and compressing the same; (S3) passing the primary melted fiber-reinforced composite material layer through the local melting apparatus unit 200 and partially melting the same; (S4) passing the partially melted fiber-reinforced composite material laminate through a molding apparatus unit 300 equipped with a molding press, and bending and compressing the partially melted fiber-reinforced composite material laminate in a structure form; And (S5) cutting the fiber-reinforced composite material laminated by bending and compression-molding in the form of the structure into a structure length.

[( S1 ) Step: Feeding step of fiber-reinforced composite material]

First, in the present invention, the step (S1) is a step of putting two or more single-layered fiber-reinforced composite materials 10 so as to be laminated so that each of the fiber- Into the molding apparatus at a calculated angle.

At this time, the fiber-reinforced composite material to be charged is (a) a UD tape formed by impregnating a fiber yarn arranged in one direction with a resin; And (b) a plate-like composite material in the form of a single layer (Ply) formed by impregnating a nonwoven fabric or a fabric with a resin. The fiber yarn to the nonwoven fabric or the knitted fabric plays a role of a reinforcement in the fiber-reinforced composite material, and it may be advantageous in terms of strength improvement to include high-strength fibers such as glass fiber, carbon fiber and aramid fiber, Natural fibers such as cotton, hemp, wool, silk, etc., as well as synthetic fibers such as cotton, acetate, polyamide, polyester, polyurethane and acrylic.

The resin forming the fiber-reinforced composite material should be capable of being remelted. Therefore, it is preferable to use a resin such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyamide (PA), polyacetal A thermoplastic resin including phenylene sulfide (PBT), polyphenylene sulfide (PPS), polyethyl ether ketone (PEEK) resin and the like may be used. However, it is preferable that the resin is impregnated in a proportion of 30 wt% to 50 wt% of the total weight of the composite material in view of securing the physical properties of the high performance composite material to a minimum.

In the present invention, the fiber-reinforced composite material does not cause a serious problem when two or more layers are put in order to form a laminated structure. However, in order to secure rigidity in the final structure, four or more layers of unidirectional fiber- It is more preferable that the laminate pattern is symmetrical with respect to the center of the cut surface. At this time, it is preferable that the member as the structure mainly receiving the bending moment has a large number of layers in the longitudinal direction, and the member as the structure mainly receiving the torsional moment may preferably have a certain number of layers in the longitudinal direction and the number of layers in the direction of 45 degrees.

[( S2 ) Step: Fiber-reinforced composites Of the laminate  Melting compression step]

The fiber-reinforced composite material injected in the step (S1) may be transferred to the press apparatus unit 100 in a laminated state, and the fiber-reinforced composite material laminate may be melt-compressed in the press apparatus unit (S2). In the present invention, the press unit may include a first belt press 101 and a second belt press 102 as shown in FIG. 3, wherein the first belt press re-melts a solid resin under a high-temperature and low- The second belt press serves to improve the impregnation rate between the layers in the process of consolidating the layers under the conditions of low temperature and high pressure, and improving the impregnation rate between the unidirectional fiber composites.

More specifically, the step (S2) firstly passes the two or more fiber-reinforced composite materials laminated in the laminated state in the step (S1) to the first belt press, The composite laminate is first melted and compressed by applying a pressure at a contact temperature such that the press is in contact with the composite at a temperature of 30 占 폚 or the lamination thickness of the composite and the press interval within 1 mm. At this time, the laminate of the fiber-reinforced composite material is first melted and compressed to be pre-consolidated (step S2-1).

In the present invention, when the temperature of the first belt press falls below the above-mentioned range, if the temperature of the first belt press falls below the above range, the resin of each layer may not be sufficiently melted, such as interlayer melting unevenness may be generated. have. In addition, since the pressure is a step for maintaining the shape of the uni-directional composite rather than the pressure for molding, it is preferable to maintain the distance of the contact degree, not the pressure actually applied. If excessive pressure is applied, the fibers may flow.

Next, the laminate of the first melted and compressed fiber-reinforced composite material in the step (S2-1) is passed through the second belt press, and the temperature is 20 to 50 ° C lower than the crystallization temperature (Tc) of the resin constituting the composite material The melted resin is recrystallized and the distinction between layers is canceled by secondary melting and compression at a temperature of 20 bar to 80 bar (step S2-2). If the pressure is less than 20 bar, the bubbles contained in the composite are not sufficiently discharged to form a dense structure, and if excessive pressure is applied, the fibers may be damaged locally.

[( S3 ) Step: Fiber-reinforced composites Of the laminate  Partial melting step]

The fiber-reinforced composite laminate 20 having passed through the press device passes through the local melting apparatus unit 200 and passes only the portion where the fiber-reinforced composite material laminate is to be bent and compression-molded, so that the melt temperature (Tm) Heat is applied at a high temperature in the range of < RTI ID = 0.0 > 30 C < / RTI > 4, the local melting apparatus 200 according to the present invention may have a structure in which an IR heater 202 is arranged in advance in an IR (infrared ray) heater frame 201 at a position to be processed And melts a portion of the composite laminate by the light in the infrared region irradiated from the arranged IR heater.

Unlike the hot-air type heater, the heat source used in the local melting apparatus unit is infrared ray, which is advantageous for locally heating a desired site. The heat generated by the infrared ray constitutes a composite material If it does not reach the melting temperature (Tm) of the resin, a problem that molding and dense structure can not be formed may occur, and resin decomposition may occur when an excessively high temperature is irradiated.

[( S4 ) And ( S5 ) Step: Fiber-reinforced composites Of the laminate  Molding and cutting step]

After the molded part is partially melted through the step (S3), the locally melted composite laminate 30 is transferred to the molding machine part 300 and is subjected to bending and compression molding, and finally cut to obtain a fiber- (40). More specifically, in the present invention, the molding apparatus 300 may include a molding die 301 and a shape die 302 having a cross section area of a final structure as shown in FIG. 5 And when the forming press bends and compresses the fiber-reinforced composite material at a pressure of 20 bar to 60 bar, the shape die serves to support it.

In the molding apparatus, a condition in which the temperature and the pressure in the second belt press are similarly maintained is required, so that the imbalance in the composition of the local forming part can be prevented.

Thus, the present invention can provide a fiber-reinforced composite material laminated structure having a porosity of 1% to 3% according to the ASTM D2734 measurement standard by the above-described manufacturing method. Here, the porosity is a basis for judging the texture density of the composite laminate structure. If the porosity is more than 3%, it may cause a problem that it is less than the designed physical property, and the closed mold, But it is practically difficult to achieve less than 1% in the process limit of molding in an open mold.

Example

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are for the purpose of illustrating the present invention more specifically, and the present invention is not limited thereto.

Example  One

UD-TAPE was used as the reinforcing fiber, and UD-TAPE was used as the impregnating resin. The UD-Tape was fed through a feed roll at a [0 ° / 90 °] 3S lamination angle, and then transferred to a press unit, through a first belt press (temperature 200 ° C., press interval: +0.5 mm against final composite thickness) Primary melt compression and secondary melt compression through a second belt press (temperature 100 캜, pressure 40 bar). Thereafter, the resultant was transferred to the local melting apparatus unit, heat was applied to the portion 10 cm away from the edges at both sides in the longitudinal direction at a temperature of 200 DEG C, the substrate was continuously transferred to the molding apparatus,

Figure pat00001
Shaped structure, and cut into a length of 30 cm to prepare a fiber-reinforced composite laminate structure.

Comparative Example  One

A laminate structure of a fiber-reinforced composite material was prepared in the same manner as in Example 1, except that heat of 200 캜 was applied to the entire laminate, not local melting.

Comparative Example  2

Fiber composite material laminate structure was manufactured in the same manner as in Example 1 except that the second melt press process by the second belt press was omitted.

Comparative Example  3

A fiber-reinforced composite material laminate structure was prepared in the same manner as in Example 2 except that the first melt-compression process by the first belt press was omitted.

Then, the properties of Example 1 and Comparative Examples 1 to 3 were measured.

< Measurement example >

(1) Measurement of Porosity: According to ASTM D 2734, the porosity was calculated by the following formula (1). Where V is the porosity, M d is the measured specific gravity, r is the weight fraction of the resin, g is the weight fraction of the fiber, d r is the specific gravity of the resin, and d g is the specific gravity of the fiber. The specific gravity of the composite material, specific gravity of the fiber and specific gravity of the resin were measured according to ASTM D 792, and the weight ratio was measured after the sintering method and the sintering with acetone.

Equation 1)

Figure pat00002

(2) Tensile strength: A tensile strength was measured at a tensile speed of 2 mm / min, a sample length of 250 mm and an atmospheric temperature of 25 占 폚 and 65% RH using a universal testing machine according to ASTM D 3039. At this time,

Figure pat00003
"Was taken from the vertical part of the specimen, and it was experimentally measured in equilibrium at 25 ° C and 65% RH.

(3) Flexural strength: Flexural strength was measured at 23 DEG C according to ASTM D 790 using a universal testing machine.

(4) Tensile elastic modulus: Measured according to ASTM D 3039 method. At this time, a Least square method was used in the range of 1000 ~ 3000με.

Porosity
(%) The tensile strength
(MPa) Flexural strength
(MPa) Elastic modulus
(GPa) Example 1 1.8 340 420 16.1 Comparative Example 1 2.4 290 380 15.4 Comparative Example 2 6.9 255 320 14.2 Comparative Example 3 2.0 310 390 15.7

As can be seen from the results of Table 1, when the same heat is applied to the entire laminate in the local melting apparatus (Comparative Example 1)

Figure pat00004
(Comparative Example 2) In the case of performing melt compression through passing through a press device portion and without performing secondary melt compression (Comparative Example 2) And the pores inside the material were not removed uniformly, resulting in a decrease in physical properties. Further, when the first melt compression process was not performed, the fiber arrangement was disturbed, and the physical properties were found to be limited compared to Example 1.

1: Overall process chart
10: Fiber-reinforced composite material 20: Fiber-reinforced composite material laminate
30: Locally fused composite laminate 40: Molded composite laminate
100: Press apparatus section
101: Belt press (high temperature part) 102: Belt press (low temperature part)
200: Local melting unit
201: IR heater frame 202: IR heater
300: Composite molding apparatus section
301: Roll press with shape 302: Shape die
303: Fuller 304: Cutter

Claims (6)

(S1) two or more fiber-reinforced composites in a laminated state at an angle calculated according to the lamination pattern;
(S2) passing the two or more fiber-reinforced composite materials stacked in the laminated state in the step (S1) through the press apparatus unit 100 provided with the first belt press and the second belt press, and melting and compressing the same;
(S3) passing the primary melted fiber-reinforced composite material layer through the local melting apparatus unit 200 and partially melting the same;
(S4) passing the partially melted fiber-reinforced composite material laminate through a molding apparatus unit 300 equipped with a molding press, and bending and compressing the partially melted fiber-reinforced composite material laminate in a structure form; And
(S5) cutting the fiber-reinforced composite material laminated by folding and compression-molding the fiber-reinforced composite material into a structure length.
The method of claim 1, wherein the fiber-reinforced composite material to be applied in step (S1)
(a) a UD tape formed by impregnating a fiber yarn arranged in one direction with a resin; And
(b) a plate-like composite in the form of a single layer (Ply) formed by impregnating a nonwoven fabric or a fabric with a resin.
The method according to claim 1, wherein the step (S2) comprises: (S2-1) passing the two or more fiber-reinforced composite materials laminated in the laminated state in the step (S1) to the first belt press, The first step of melting and compacting the composite laminate by applying a pressure at a contact temperature that is 5 ° C to 30 ° C higher than the temperature (Tm), such that the press is in contact with the composite material or the contact layer maintains a press interval of 1 mm or less ; And
(S2-1) The fiber-reinforced composite material laminated firstly melted and compressed in the step (S2-1) is passed through the second belt press, and the temperature of the resin composing the composite material, And secondly melting and compressing the mixture at a low temperature of 50 DEG C to a pressure of 20 bar to 80 bar.
The method according to claim 1, wherein the partial melting in the step (S3) is carried out at a step (S4) in which only the part where the fiber-reinforced composite material laminate is to be bent and compression- Lt; RTI ID = 0.0 &gt; 30 C &lt; / RTI &gt; by applying heat to the fiber-reinforced composite laminate structure.
2. The method of claim 1, wherein the forming press in step (S4) comprises bending and compressing the fiber-reinforced composite material at a pressure of 20 bar to 60 bar.
A fiber-reinforced composite laminate structure manufactured by the method of any one of claims 1 to 5 and having a porosity of 1% to 3% according to ASTM D 2734 measurement standard.
KR1020150191154A 2015-12-31 2015-12-31 Laminatied Structures Of Fiber Reinforced Composite Material And Manufacturing Method Of The Same KR20170080970A (en)

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