KR20090099215A - Process of preparing continuous fiber reinforced thermoplastic composite with high strength - Google Patents

Process of preparing continuous fiber reinforced thermoplastic composite with high strength Download PDF

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Publication number
KR20090099215A
KR20090099215A KR1020080024335A KR20080024335A KR20090099215A KR 20090099215 A KR20090099215 A KR 20090099215A KR 1020080024335 A KR1020080024335 A KR 1020080024335A KR 20080024335 A KR20080024335 A KR 20080024335A KR 20090099215 A KR20090099215 A KR 20090099215A
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South Korea
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continuous
high strength
thermoplastic composite
fiber
reinforced
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KR1020080024335A
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Korean (ko)
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윤인세
김희준
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(주)엘지하우시스
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/18—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length in the form of a mat, e.g. sheet moulding compound [SMC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/545—Perforating, cutting or machining during or after moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2055/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2023/00 - B29K2049/00, e.g. having a vinyl group, as moulding material
    • B29K2055/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

A process of preparing continuous fiber reinforced thermoplastic composite with high strength is provided to minimize the thermal degradation of a thermoplastic resin and secure high economical efficiency by simplifying and continuously performing all production processes. A process of preparing continuous fiber reinforced thermoplastic composite with high strength comprises the steps of: injecting a thermal plastic resin and an additive into an extruder(10); extruding a mixture in melted heat-plastic resin composition; laminating a continuous fiber sheet at the both sides of the melted heat plastic resin composition; impregnating the heat-plastic resin composition on the laminated continuous fiber sheet by a continuous press device(18), wherein the continuous press includes a heating zone(20); cutting a sheet into a local reinforcement strands by a cutting device(24); and molding the cut local reinforcement strands into a high intensive heat plastic composition in a molder(42).

Description

연속섬유가 보강된 고강도 열가소성 복합재의 제조공정{PROCESS OF PREPARING CONTINUOUS FIBER REINFORCED THERMOPLASTIC COMPOSITE WITH HIGH STRENGTH}Manufacture process of high strength thermoplastic composite reinforced with continuous fiber {PROCESS OF PREPARING CONTINUOUS FIBER REINFORCED THERMOPLASTIC COMPOSITE WITH HIGH STRENGTH}

본 발명은 차량의 구조용 부품에 사용되는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정에 관한 것이다. The present invention relates to a process for producing a high strength thermoplastic composite reinforced with continuous fibers used in structural parts of a vehicle.

일반적으로 고강도 열가소성 복합재의 종류에는 유리섬유매트 열가소성 복합재(Glass Mat Thermoplastic, 이하 'GMT'라 함), 장섬유가 보강된 팰릿을 이용한 사출형식의 복합재 (Granule - Long Fiber reinforced Thermoplastic, 이하 'G-LFT'라 함), 다이렉트 콤파운딩(Direct Compounding)을 이용한 열가소성 복합재 (Long Fiber reinforced Thermoplastic - Direct Compounding, 이하 'LFT-D'라 함)가 있다. Generally, high strength thermoplastic composites include glass mat thermoplastic (GMT) and injection-type composites using long fiber reinforced pellets (Granule-Long Fiber reinforced Thermoplastic, hereinafter 'G-'). LFT ', and Long Fiber reinforced Thermoplastic-Direct Compounding (hereinafter referred to as' LFT-D').

상기 고강도 열가소성 복합재는 단섬유 복합재 대비 장섬유를 이용하여 충격강도, 굽힘탄성율, 굽힘강도를 보강하였으나, 범퍼 빔, 시트백 등과 같은 일부 자동차 부품에 적용하기 위해서는 연속섬유가 보강된 추가적인 국부 강성보강재를 필 요로 한다. The high-strength thermoplastic composite reinforces impact strength, flexural modulus, and bending strength by using longer fibers than short-fiber composites, but additional local stiffeners with continuous fibers are required to be applied to some automotive parts such as bumper beams and seatbacks. I need it.

현재 상용화되어 있는 국부보강재로는 프랑스 Saint-Gobain Vetrotex 社의 TwinTex와 독일 Bond Laminate 社의 Tepex 등이 있다. 그러나 이러한 국부보강재는 고강도 열가소성 복합재에 적용시켜 제품을 성형하기 전에 오븐에서 예열과정을 거쳐야 하는 번거로움이 있으며 국부보강재의 보관 및 이송과정에서 비용이 증가하는 원인이 된다.Local reinforcements currently commercialized include TwinTex of Saint-Gobain Vetrotex of France and Tepex of Bond Laminate of Germany. However, these local reinforcements have to be preheated in an oven before forming products by applying them to high-strength thermoplastic composites, and increase costs in storage and transport of local reinforcements.

상기와 같은 종래기술의 문제점을 해결하고자, 본 발명은 공정과 비용면에서 경제성이 우수하고 열가소성 수지의 열적 열화를 최소화시키는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정을 제공하는 것을 목적으로 한다. In order to solve the problems of the prior art as described above, an object of the present invention is to provide a process for producing a high-strength thermoplastic composite reinforced with continuous fibers that is excellent in economics in terms of process and cost and minimizes thermal degradation of the thermoplastic resin.

본 발명의 상기 목적 및 기타 목적들은 하기 설명된 본 발명에 의하여 모두 달성될 수 있다.The above and other objects of the present invention can be achieved by the present invention described below.

상기의 목적을 달성하기 위하여, In order to achieve the above object,

차량의 구조용 부품에 사용되는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정에 있어서, In the manufacturing process of a high strength thermoplastic composite reinforced with continuous fibers used for structural parts of the vehicle,

(a) 열가소성 수지 및 첨가제를 압출기(10)에 투입하고, 용융 및 혼련하여 용융된 열가소성 수지 조성물로 압출하는 압출공정; (a) an extrusion process of injecting a thermoplastic resin and an additive into the extruder 10, melting and kneading and extruding the molten thermoplastic resin composition;

(b) 용융된 열가소성 수지 조성물의 양 표면에 연속섬유 시트를 적층시키는 적층공정; (b) a lamination step of laminating a continuous fiber sheet on both surfaces of the molten thermoplastic resin composition;

(c) 적층된 연속섬유 시트에 용융된 열가소성 수지 조성물이 함침되도록, 히팅존(20)을 포함하는 연속프레스 장치(18)를 이용하여 가공하는 가공공정; (c) a processing step of using the continuous press device 18 including the heating zone 20 to impregnate the molten thermoplastic resin composition in the laminated continuous fiber sheet;

(d) 가공된 시트를 커팅기(24)를 이용하여 소정 크기의 국부보강재 스트랜드로 절단하는 절단공정; 및 (d) a cutting step of cutting the processed sheet into local reinforcement strands of a predetermined size using a cutter 24; And

(e) 절단된 국부보강재 스트랜드와 고강도 열가소성 스트랜드를 성형기(42) 에 투입하여 연속섬유가 보강된 고강도 열가소성 복합재로 성형하는 성형공정을 포함하며, (e) inserting the cut local reinforcement strand and the high strength thermoplastic strand into the molding machine 42 to form a high strength thermoplastic composite reinforced with continuous fibers;

상기 모든 공정은 연속적으로 실시되는 것을 특징으로 하는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정을 제공한다.All of the above process provides a process for producing a high strength thermoplastic composite reinforced with continuous fibers, characterized in that carried out continuously.

또한, 상기 제조공정에 의해 제조된 연속섬유가 보강된 고강도 열가소성 복합재를 제공한다.In addition, it provides a high-strength thermoplastic composite reinforced with continuous fibers produced by the manufacturing process.

본 발명에 따르면 전 생산공정이 연속공정화 및 단순공정화됨으로써 경제성이 우수하고 열가소성 수지의 열적 열화를 최소화시키는 효과가 있다. According to the present invention, the entire production process is continuously processed and simplified, so that the economic efficiency is excellent and the thermal degradation of the thermoplastic resin is minimized.

이하 본 발명을 상세하게 설명한다. Hereinafter, the present invention will be described in detail.

본 발명에서는 연속섬유가 보강된 국부보강재의 제조공정을 고강도 열가소성 복합재의 제조공정에 연속적으로(In-Line) 연결시켜 연속섬유가 보강된 고강도 열가소성 복합재를 제조하는 공정을 제공한다. The present invention provides a process for producing a high-strength thermoplastic composite reinforced with continuous fibers by in-line connecting the manufacturing process of the continuous fiber reinforced local reinforcement to the manufacturing process of the high strength thermoplastic composite.

즉, 종래에는 미리 제조된 연속섬유가 보강된 국부보강재를 고강도 열가소성 복합재에 적용하여 함께 성형시키기 이전에 국부보강재를 오븐에서 예열하는 과정을 거쳐야 했으며, 이에 따라 공정상의 번거로움과 국부보강재의 보관 및 이송 과정에서 많은 비용이 요구되었고, 열가소성 수지의 열적 열화가 발생하였다. 본 발명은 상기 문제점들을 개선하기 위한 것으로, 연속섬유가 보강된 국부보강재를 제조하는 공정 자체를 고강도 열가소성 복합재의 제조공정에 연속적으로(In-Line) 연 결시킴으로써, 국부보강재를 오븐에서 예열하는 과정을 필요로 하지 않게 되면서 상기 문제점들이 개선될 수 있다. In other words, prior to applying a locally prepared reinforced fiber reinforced local reinforcement to a high-strength thermoplastic composite, the local reinforcement had to be preheated in an oven. High cost was required in the transfer process, and thermal degradation of the thermoplastic resin occurred. The present invention is to improve the above problems, the process of pre-heating the local reinforcement in the oven by connecting the process itself for producing a continuous fiber reinforced local reinforcement (In-Line) to the manufacturing process of the high-strength thermoplastic composite material. The problems can be improved while not requiring it.

도 1은 종래기술에 따른 국부보강재의 제조공정을 나타내는 개략도이며, 도 2는 종래기술에 따른 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정을 나타내는 개략도이다. 1 is a schematic view showing a manufacturing process of a local reinforcing material according to the prior art, Figure 2 is a schematic view showing a manufacturing process of a high strength thermoplastic composite reinforced with continuous fibers according to the prior art.

상기 도 1 및 도 2에서 보는 바와 같이, 종래에는 국부보강재의 제조공정과 상기 제조공정에서 얻은 국부보강재를 고강도 열가소성 복합재에 적용시키는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정이 별도로 진행된다. As shown in FIG. 1 and FIG. 2, conventionally, a process of manufacturing a local reinforcement and a process of manufacturing a high strength thermoplastic composite reinforced with continuous fibers applying the local reinforcement obtained in the manufacturing process to a high strength thermoplastic composite are separately performed.

우선 도 1에서 보는 바와 같이, 열가소성 수지(12) 및 첨가제(14)를 압출기(10)에 투입하고, 용융 및 혼련하여 용융된 열가소성 수지 조성물로 압출한 후, 상기 용융된 열가소성 수지 조성물의 양 표면에 연속섬유(16) 시트를 적층시킨다. First, as shown in FIG. 1, the thermoplastic resin 12 and the additive 14 are introduced into the extruder 10, melted and kneaded, extruded into a molten thermoplastic resin composition, and then both surfaces of the molten thermoplastic resin composition. A sheet of continuous fiber 16 is laminated on the sheet.

상기 연속섬유(Continuous Fiber)는 제품상태에서 섬유가 절단되지 않은 상태로 방향성을 가지는 연속상태로 존재하는 것을 의미한다. The continuous fiber means that the fiber exists in a continuous state having a direction in the state that the fiber is not cut in the product state.

이러한 연속섬유는 유리섬유, 탄소섬유, 아라미드 섬유 또는 천연섬유 등을 사용할 수 있다. 또한, 직조섬유 또는 단방향 섬유인 것을 사용할 수 있다.Such continuous fibers may be glass fibers, carbon fibers, aramid fibers or natural fibers. Further, woven fibers or unidirectional fibers can be used.

다음, 상기 적층된 연속섬유 시트에 용융된 열가소성 수지 조성물이 함침되도록, 히팅존(heating zone)(20) 및 쿨링존(cooling zone)(22)을 포함하는 연속프레스 장치(18)를 이용하여 가공하는 가공공정을 거친다. Next, processing is performed using a continuous press device 18 including a heating zone 20 and a cooling zone 22 to impregnate the molten thermoplastic resin composition in the laminated continuous fiber sheet. Processing is done.

이후, 가공된 시트를 커팅기(24)를 이용하여 소정 크기의 국부보강재로 절단하는 절단공정을 거침으로써 연속섬유가 보강된 국부보강재(26)를 얻게 되며, 이를 최종 제품으로 사용할 수 있다. Subsequently, the processed sheet is cut into a local reinforcement material having a predetermined size by using the cutting machine 24, thereby obtaining a local reinforcing material 26 reinforced with continuous fibers, which can be used as a final product.

이렇게 얻어진 국부보강재를 고강도 열가소성 복합재에 적용시키기 위하여, 별도의 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정이 진행된다. 이를 위해 도 2에서 보는 바와 같이, 상기 얻어진 국부보강재를 오븐(30)을 통하여 재가열 과정을 거쳐 용융 상태로 만들고, 이렇게 만들어진 국부보강재 스트랜드(32)와 고강도 열가소성 스트랜드(40)를 성형기(42)에 투입하여 연속섬유가 보강된 고강도 열가소성 복합재(44)로 성형하는 성형공정을 거치게 된다. 스트랜드는 열가소성 수지에 보강섬유가 함침된 상태로 존재하며, 고온의 상태로 유지되는 관계로 유동성을 가지며, 압축성형을 통하여 제품이 성형된다. In order to apply the local reinforcement thus obtained to the high-strength thermoplastic composite, a manufacturing process of a high-strength thermoplastic composite reinforced with a separate continuous fiber is in progress. To this end, as shown in FIG. 2, the obtained local reinforcing material is made into a molten state through a reheating process through the oven 30, and the local reinforcing material strand 32 and the high-strength thermoplastic strand 40 thus formed are formed in the molding machine 42. It is subjected to a molding process by molding into a high-strength thermoplastic composite 44 reinforced with continuous fibers. Strand is present in the state impregnated with the reinforcing fibers in the thermoplastic resin, has a fluidity in the state of maintaining a high temperature, the product is molded through compression molding.

이때, 상기 고강도 열가소성 스트랜드(40)는 GMT(Glass Mat Thermoplastic), G-LFT(Granule-Long Fiber reinforced Thermoplastic) 또는 LFT-D(Long Fiber reinforced Thermoplastic-Direct compounding) 공정으로 제조될 수 있다. 도 2는 이 중 디펜바커사 설비의 LFT-D의 공정을 제시하고 있다. In this case, the high strength thermoplastic strand 40 may be manufactured by glass mat thermoplastic (GMT), granule-long fiber reinforced thermoplastic (G-LFT) or long fiber reinforced thermoplastic-direct compounding (LFT-D). Figure 2 shows the process of LFT-D of the Defenbacher facility of these.

즉, PP(polypropylene), PA(polyacetate), PET(polyethyleneterephthalate), PA(polyamide) 또는 ABS(acrylonitril-butadiene-styrene) 등의 열가소성 수지(12)와 강도강화 및 열안정제 등의 첨가제(14)가 1차 압출기(34)에 유입되어 용융 및 혼합된 후 2차 압출기(36)에 투입된다. 이렇게 2차 압출기에 투입된 수지에 보강섬유인 유리섬유 로빙(38)을 함침시켜 2차 혼합이 이루어지며 상기에서 언급한 스트랜드(40) 상태로 2차 압출기에서 토출된다.That is, thermoplastic resins 12 such as polypropylene (PP), polyacetate (PA), polyethyleneterephthalate (PET), polyamide (PA), or acryllonitril-butadiene-styrene (ABS) and additives 14 such as strength enhancing and thermal stabilizers It is introduced into the primary extruder 34, melted and mixed, and then introduced into the secondary extruder 36. In this way, secondary resin is impregnated by impregnating the glass fiber roving 38, which is a reinforcing fiber, in the resin introduced into the secondary extruder, and is discharged from the secondary extruder in the state of the strand 40 mentioned above.

상기 GMT 공정은 스위스의 쿼드란트(Quadrant), 미국의 아즈델 (Azdel)사의 특허에 의해 잘 알려져 있는데, 이는 유리섬유매트와 수지층이 수개의 층으로 적층되어 있으며 이를 용융 압착하여 제조한 GMT 시트 원단을 가열 압축 성형하여 제조하는 기술이며, 이는 부분적으로 단방향 보강이 가능한 특징이 있다. The GMT process is well known by the patents of Swiss Quadrant and Azdel of the United States, which have a glass fiber mat and a resin layer laminated in several layers and manufactured by melting and pressing the GMT. It is a technology for manufacturing the sheet fabric by heat compression molding, which is partly characterized by one-way reinforcement.

상기 G-LFT 공정은 대한민국의 LG화학, 삼박 LFT의 특허에 의해, 상기 LFT-D 공정은 독일의 디펜하커(Dieffenbacher)사의 특허에 의해 잘 알려져 있으며, 이러한 LFT 공정은 펄트루션 공정에 의하여 완전 함침된 장섬유 펠릿을 사출 또는 저압 사출하여 가공하는 방법이다. The G-LFT process is well-known by the patent of LG Chem, Sambak LFT of Korea, and the LFT-D process is well known by the patent of Dieffenbacher of Germany, and this LFT process is completely completed by the perturbation process. It is a method of processing impregnated long fiber pellets by injection or low pressure injection.

도 3은 본 발명에 따른 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정을 나타내는 개략도이다.Figure 3 is a schematic diagram showing the manufacturing process of a high strength thermoplastic composite reinforced with continuous fibers according to the present invention.

상기 도 3에서 보는 바와 같이, 본 발명은 연속섬유가 보강된 국부보강재의 제조공정을 고강도 열가소성 복합재의 제조공정에 연속적으로(In-Line) 연결시켜 전 생산공정이 연속공정화 및 단순공정화된다. As shown in FIG. 3, the present invention connects a continuous fiber reinforced local reinforcement manufacturing process to an in-line manufacturing process of a high-strength thermoplastic composite, thereby making the entire production process continuous and simple.

구체적으로, (a) 열가소성 수지(12) 및 첨가제(14)를 압출기(10)에 투입하고, 용융 및 혼련하여 용융된 열가소성 수지 조성물로 압출하는 압출공정; (b) 용융된 열가소성 수지 조성물의 양 표면에 연속섬유(16) 시트를 적층시키는 적층공정; (c) 적층된 연속섬유 시트에 용융된 열가소성 수지 조성물이 함침되도록, 히팅존(20)을 포함하는 연속프레스 장치(18)를 이용하여 가공하는 가공공정; (d) 가공된 시트를 커팅기(24)를 이용하여 소정 크기의 국부보강재 스트랜드(32)로 절단하는 절단공정; 및 (e) 절단된 국부보강재 스트랜드(32)와 고강도 열가소성 스트랜드(40)를 성형기(42)에 투입하여 연속섬유가 보강된 고강도 열가소성 복합재(44)로 성형하는 성형공정을 거치게 된다. 상기 모든 공정은 연속적으로 실시되는 것을 특징으로 한다.Specifically, (a) an extrusion step of injecting the thermoplastic resin 12 and the additive 14 into the extruder 10, melting and kneading and extruding the molten thermoplastic resin composition; (b) a lamination step of laminating continuous fiber 16 sheets on both surfaces of the molten thermoplastic resin composition; (c) a processing step of using the continuous press device 18 including the heating zone 20 to impregnate the molten thermoplastic resin composition in the laminated continuous fiber sheet; (d) a cutting step of cutting the processed sheet into local reinforcement strands 32 of a predetermined size using a cutter 24; And (e) inserting the cut local reinforcement strand 32 and the high strength thermoplastic strand 40 into the molding machine 42 to form a high strength thermoplastic composite 44 reinforced with continuous fibers. All the above process is characterized in that it is carried out continuously.

상기 고강도 열가소성 스트랜드(40)는 도 2에서 설명한 바와 동일한 공정에서 동일한 방법으로 제조될 수 있다. The high strength thermoplastic strand 40 may be manufactured in the same manner in the same process as described in FIG.

본 발명에서는 국부보강재의 제조공정을 고강도 열가소성 복합재의 제조공정에 연속적으로(In-Line) 연결시켜 진행되므로 종래의 경우처럼 국부보강재를 별도로 오븐에서 예열할 필요가 없게 된다. 이와 아울러, 국부보강재를 최종 제품화하는 것이 아니므로 연속프레스 장치(18)에서도 쿨링존이 필요하지 않게 된다. In the present invention, the process of manufacturing the local reinforcing material is continuously connected to the manufacturing process of the high-strength thermoplastic composite (In-Line) so that the local reinforcing material does not need to be preheated separately in the oven as in the conventional case. In addition, since the local reinforcing material is not finalized, the cooling zone is not required even in the continuous press device 18.

상기 (c)의 가공공정은 연속프레스 장치(18)에서 연속섬유 시트 사이로 용융된 열가소성 수지 조성물이 함침될 수 있게 고온 및 고압이 가해지게 된다. 또한, 쿨링존이 존재하지 않으므로 연속프레스 장치(18)를 통해 나오는 가공된 시트는 점성이 있는 용융 상태로 존재하게 된다. In the processing step of (c), high temperature and high pressure are applied so that the molten thermoplastic resin composition may be impregnated between the continuous fiber sheets in the continuous press device 18. In addition, since there is no cooling zone, the processed sheet exiting through the continuous press device 18 is in a viscous molten state.

본 발명에서 사용되는 상기 열가소성 수지는 PP(polypropylene), PA(polyacetate), PET(polyethyleneterephthalate), PA(polyamide) 또는 ABS(acrylonitril-butadiene-styrene) 등을 사용할 수 있다.The thermoplastic resin used in the present invention may be PP (polypropylene), PA (polyacetate), PET (polyethyleneterephthalate), PA (polyamide) or ABS (acrylonitril-butadiene-styrene).

본 발명에서 사용되는 상기 첨가제는 강도강화 및 열안정제 등을 사용할 수 있다. The additive used in the present invention may be used, such as strength enhancer and heat stabilizer.

또한, 본 발명에서 사용되는 상기 고강도 열가소성 스트랜드 및 연속섬유는 앞에서 살펴본 종래 기술에서 사용된 것과 동일한 종류를 사용할 수 있다. In addition, the high-strength thermoplastic strands and continuous fibers used in the present invention may use the same kind as used in the prior art.

본 발명에 따른 상기 연속프레스 장치는 더블벨트프레스기인 것이 바람직하 다.The continuous press device according to the invention is preferably a double belt press.

상기와 같이 국부보강재의 오븐을 통한 재가열 과정을 거치지 않고 제조된 연속섬유가 보강된 고강도 열가소성 복합재는 열가소성 수지의 열적 열화를 최소화하는 장점을 포함하고 있다. As described above, the high-strength thermoplastic composite reinforced with continuous fibers manufactured without undergoing a reheating process through an oven of a local reinforcement includes an advantage of minimizing thermal degradation of the thermoplastic resin.

또한, 상기와 같이 제조된 연속섬유가 보강된 고강도 열가소성 복합재는 범퍼 빔 및 시트백 등과 같은 차량의 구조용 부품에 사용될 수 있다. In addition, the high-strength thermoplastic composite reinforced with continuous fibers prepared as described above can be used for structural parts of vehicles such as bumper beams and seatbacks.

이상에서 본 발명의 기재된 구체예를 중심으로 상세히 설명하였지만, 본 발명의 범주 및 기술사상 범위 내에서 다양한 변경 및 수정이 가능함은 당업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속하는 것도 당연한 것이다.Although described in detail above with reference to the specific embodiments of the present invention, it will be apparent to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention, and such modifications and modifications belong to the appended claims. It is also natural.

도 1은 종래기술에 따른 국부보강재의 제조공정을 나타내는 개략도이다. 1 is a schematic diagram showing a manufacturing process of a local reinforcing material according to the prior art.

도 2는 종래기술에 따른 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정을 나타내는 개략도이다. Figure 2 is a schematic diagram showing a manufacturing process of a high strength thermoplastic composite reinforced with continuous fibers according to the prior art.

도 3은 본 발명에 따른 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정을 나타내는 개략도이다. Figure 3 is a schematic diagram showing the manufacturing process of a high strength thermoplastic composite reinforced with continuous fibers according to the present invention.

*도면의 주요 부호에 대한 간단한 설명** Brief description of the main symbols in the drawings *

10: 국부보강재용 압출기 10: extruder for local reinforcement

12: 열가소성 수지 12: thermoplastic resin

14: 첨가제 14: additive

16: 연속섬유 16: continuous fiber

18: 연속프레스 장치18: continuous press device

20: 히팅존20: heating zone

22: 쿨링존22: cooling zone

24: 커팅기24: cutting machine

26: 종래기술에 따른 국부보강재26: Local reinforcement according to the prior art

28: 적재다이28: loading die

30: 오븐30: oven

32: 국부보강재 스트랜드32: local reinforcement strand

34: 고강도 열가소성 복합재용 1차 압출기34: Primary Extruder for High Strength Thermoplastic Composites

36: 고강도 열가소성 복합재용 2차 압출기36: Second Extruder for High Strength Thermoplastic Composites

38: 유리섬유 로빙38: fiberglass roving

40: 고강도 열가소성 스트랜드40: high strength thermoplastic strand

42: 성형기42: molding machine

44: 연속섬유가 보강된 고강도 열가소성 복합재44: high strength thermoplastic composite reinforced with continuous fibers

Claims (8)

차량의 구조용 부품에 사용되는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정에 있어서, In the manufacturing process of a high strength thermoplastic composite reinforced with continuous fibers used for structural parts of the vehicle, (a) 열가소성 수지 및 첨가제를 압출기(10)에 투입하고, 용융 및 혼련하여 용융된 열가소성 수지 조성물로 압출하는 압출공정; (a) an extrusion process of injecting a thermoplastic resin and an additive into the extruder 10, melting and kneading and extruding the molten thermoplastic resin composition; (b) 용융된 열가소성 수지 조성물의 양 표면에 연속섬유 시트를 적층시키는 적층공정; (b) a lamination step of laminating a continuous fiber sheet on both surfaces of the molten thermoplastic resin composition; (c) 적층된 연속섬유 시트에 용융된 열가소성 수지 조성물이 함침되도록, 히팅존(20)을 포함하는 연속프레스 장치(18)를 이용하여 가공하는 가공공정; (c) a processing step of using the continuous press device 18 including the heating zone 20 to impregnate the molten thermoplastic resin composition in the laminated continuous fiber sheet; (d) 가공된 시트를 커팅기(24)를 이용하여 소정 크기의 국부보강재 스트랜드로 절단하는 절단공정; 및 (d) a cutting step of cutting the processed sheet into local reinforcement strands of a predetermined size using a cutter 24; And (e) 절단된 국부보강재 스트랜드와 고강도 열가소성 스트랜드를 성형기(42)에 투입하여 연속섬유가 보강된 고강도 열가소성 복합재로 성형하는 성형공정을 포함하며, (e) inserting the cut local reinforcement strand and the high strength thermoplastic strand into the molding machine 42 to form a high strength thermoplastic composite reinforced with continuous fibers; 상기 모든 공정은 연속적으로 실시되는 것을 특징으로 하는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정.All the above processes are produced in a continuous fiber reinforced high-strength thermoplastic composite, characterized in that carried out continuously. 제 1항에 있어서, The method of claim 1, 상기 열가소성 수지는 PP(polypropylene), PA(polyacetate), PET(polyethyleneterephthalate), PA(polyamide) 또는 ABS(acrylonitril-butadiene-styrene)인 것을 특징으로 하는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정.The thermoplastic resin is PP (polypropylene), PA (polyacetate), PET (polyethyleneterephthalate), PA (polyamide) or ABS (acrylonitril-butadiene-styrene) manufacturing process of a high strength thermoplastic composite reinforced with continuous fibers, characterized in that. 제 1항에 있어서,The method of claim 1, 상기 연속섬유는 유리섬유, 탄소섬유, 아라미드 섬유 또는 천연섬유인 것을 특징으로 하는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정.The continuous fiber is a glass fiber, carbon fiber, aramid fiber or natural fiber, characterized in that the continuous fiber reinforced high-strength thermoplastic composite manufacturing process. 제 1항에 있어서, The method of claim 1, 상기 연속프레스 장치는 더블벨트프레스기인 것을 특징으로 하는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정.The continuous press device manufacturing process of a high strength thermoplastic composite reinforced with continuous fibers, characterized in that the double belt press. 제 1항에 있어서, The method of claim 1, 상기 고강도 열가소성 스트랜드는 GMT(Glass Mat Thermoplastic), G-LFT(Granule-Long Fiber reinforced Thermoplastic) 또는 LFT-D(Long Fiber reinforced Thermoplastic-Direct compounding) 공정으로 제조된 것임을 특징으로 하는 연속섬유가 보강된 고강도 열가소성 복합재의 제조공정.The high strength thermoplastic strands are made of glass mat thermoplastic (GMT), Granule-Long Fiber reinforced Thermoplastic (G-LFT) or Long Fiber reinforced Thermoplastic-Direct compounding (LFT-D) processes. Manufacturing Process of Thermoplastic Composites. 제 3항에 있어서, The method of claim 3, wherein 상기 연속섬유는 직조섬유 또는 단방향 섬유인 것을 특징으로 하는 연속섬유 가 보강된 고강도 열가소성 복합재의 제조공정.The continuous fiber is a process for producing a high strength thermoplastic composite reinforced with continuous fibers, characterized in that the woven fiber or unidirectional fiber. 제 1항 내지 제 6항 기재의 제조공정에 의해 제조된 연속섬유가 보강된 고강도 열가소성 복합재.A high strength thermoplastic composite reinforced with continuous fibers produced by the manufacturing process of claim 1. 제 7항에 있어서,The method of claim 7, wherein 상기 연속섬유가 보강된 고강도 열가소성 복합재는 차량의 구조용 부품에 사용되는 것을 특징으로 하는 연속섬유가 보강된 고강도 열가소성 복합재.The continuous fiber reinforced high strength thermoplastic composite is a continuous fiber reinforced high strength thermoplastic composite, characterized in that used for structural parts of the vehicle.
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