KR102206861B1 - Uni-directional prepreg and method of manufacturing the same - Google Patents
Uni-directional prepreg and method of manufacturing the same Download PDFInfo
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- KR102206861B1 KR102206861B1 KR1020160066896A KR20160066896A KR102206861B1 KR 102206861 B1 KR102206861 B1 KR 102206861B1 KR 1020160066896 A KR1020160066896 A KR 1020160066896A KR 20160066896 A KR20160066896 A KR 20160066896A KR 102206861 B1 KR102206861 B1 KR 102206861B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
- B29C66/81435—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/045—Reinforcing macromolecular compounds with loose or coherent fibrous material with vegetable or animal fibrous material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
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- 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
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
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- 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
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
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- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0872—Prepregs
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- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
- B29K2105/101—Oriented
- B29K2105/105—Oriented uni directionally
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Abstract
필라멘트 상의 섬유들이 일방향으로 배열되어 있는 섬유시트 내에 수지를 균일하게 함침시켜 일방향성 프리프레그를 제조할 때, 상기 필라멘트 상의 섬유로 섬유길이 방향을 따라 크림프(Crimp)가 부여된 필라멘트 상의 섬유를 사용하는 것을 특징으로 한다.
본 발명으로 제조된 일방향성 프리프레그는 섬유시트를 구성하는 섬유에 크림프가 형성되어 있기 때문에 이를 사용하여 복합재료 제품을 성형할 때 곡선부분 또는 굴곡부분 등에서 수지 흐름에 적절하게 대응하도록 상기 섬유시트 내 섬유들의 재배열되는 성능이 뛰어나다.
그로 인해 성형된 복합재료 제품의 곡선부분 또는 굴곡부분에 섬유시트를 이루는 섬유의 양이 적게되거나 너트를 체결하기 위해 가공된 홀(Hole) 부분에서 섬유시트를 이루는 섬유가 절단되어 강도가 크게 저하되는 문제점들을 효과적으로 방지할 수 있다.
본 발명으로 제조된 일방향성 프리프레그를 사용하여 복합재료 제품을 성형하게 되면 복합재료의 설계가 용이하고, 최종제품의 품질 균일성이 크게 향상된다.When preparing a unidirectional prepreg by uniformly impregnating a resin into a fiber sheet in which the fibers on the filament are arranged in one direction, the fibers on the filament with a crimp applied along the fiber length direction are used as the fibers on the filament. It is characterized by that.
Since the unidirectional prepreg manufactured by the present invention has a crimp formed on the fibers constituting the fiber sheet, when molding a composite material product using it The fiber rearrangement performance is excellent.
As a result, the amount of fibers forming the fiber sheet in the curved part or the bent part of the molded composite product is reduced, or the fiber forming the fiber sheet is cut in the hole part processed to fasten the nut, which greatly reduces the strength Problems can be effectively prevented.
When the composite material product is molded using the unidirectional prepreg manufactured by the present invention, the design of the composite material is easy, and the quality uniformity of the final product is greatly improved.
Description
본 발명은 필라멘트 상의 섬유들이 일방향으로 굴곡이나 교차없이 서로 평행하게 배열되어 있는 섬유시트와 상기 섬유시트 내에 균일하게 함침되어 수지로 구성되는 프리프레그(이하 "일방향성 프리프레그" 라고 한다)에 관한 것으로서, 보다 구체적으로는 상기 섬유시트가 크림프(Crimp)가 부가된 필라멘트 상의 섬유들로 이루어져 복합재료 제품 성형시 복합재료의 설계가 용이하고 품질 균일성을 크게 개선시킬 수 있는 일방향성 프리프레그 및 그의 제조방법에 관한 것이다.The present invention relates to a fiber sheet in which fibers on a filament are arranged parallel to each other without bending or crossing in one direction, and a prepreg (hereinafter referred to as "unidirectional prepreg") composed of a resin by uniformly impregnating the fiber sheet. , More specifically, the fiber sheet is composed of filament-like fibers to which crimp is added, so that the design of the composite material is easy and the quality uniformity is greatly improved during the molding of the composite material product, and the manufacture thereof It's about how.
일방향성 프리프레그를 제조하는 종래방법으로는 제10-2012-0013364호 등에 게재된 바와 같이 필라멘트 상의 섬유들이 일방향으로 굴곡 또는 교차 없이 서로 평행하게 배열된 섬유시트 내에 열가소성 수지 또는 열경화성 수지를 균일하게 함침하는 방법이 널리 사용되어 왔다.As a conventional method for manufacturing a one-way prepreg, a thermoplastic resin or a thermosetting resin is uniformly impregnated in a fiber sheet in which the fibers on the filament are arranged parallel to each other without bending or crossing in one direction as published in No. 10-2012-0013364, etc. Method has been widely used.
다시 말해, 상기 종래방법에서는 상기 섬유길이방향을 따라 크림프(Crimp)가 형성되지 않아 굴곡이 없는, 즉 매끈한 필라멘트 상의 섬유(이하 "크림프 없는 섬유"라고 약칭한다)를 사용하여 상기의 섬유시트를 제조하였다.In other words, in the conventional method, a crimp is not formed along the fiber length direction, so that the fiber sheet is manufactured using a smooth filament-like fiber (hereinafter abbreviated as "crimp-free fiber"). I did.
그로 인해, 종래방법으로 제조된 일방향성 프리프레그를 여러겹 적층하여 복합재료 제품을 성형할 경우, 성형제품의 굴곡부분 또는 곡선 부분에서 상기 크림프 없는 섬유들이 수지흐름에 따라 적절하게 재배열되지 못해서 성형제품의 굴곡부분 또는 곡선부분에 크림프 없는 섬유의 양이 적게 되거나, 다른 소재 부품과의 상용화를 위해 너트를 체결하기 위해 가공된 홀(Hole) 부분에서 섬유가 절단되어 강도가 크게 저하되는 문제점 들이 발생 되었다.Therefore, when forming a composite material product by laminating several layers of unidirectional prepregs manufactured by the conventional method, the crimp-free fibers in the bent or curved part of the molded product cannot be properly rearranged according to the resin flow, and thus, There are problems in that the amount of fiber without crimp in the bent or curved part of the product is reduced, or the fiber is cut in the hole part processed to fasten the nut for commercialization with other material parts, resulting in a significant decrease in strength. Became.
그 결과, 종래방법으로 제조된 일방향성 프리프레그를 이용하여 복합재료 제품을 성형하는 경우 복합재료의 설계가 어렵고, 최종제품의 품질이 불균일하게 되는 문제점이 있었다.As a result, when a composite material product is molded using a unidirectional prepreg manufactured by the conventional method, it is difficult to design the composite material and the quality of the final product is uneven.
본 발명의 과제는 일방향성 프리프레그내 섬유시트를 이루는 섬유들이 복합재료 제품 성형시 곡선 또는 굴곡부분 등에서 수지 흐름에 적절하게 대응하여 재배열될 수 있는 일방향성 프리프레그 및 그의 제조방법을 제공하는 것이다.An object of the present invention is to provide a one-way prepreg and a method for producing the same in which the fibers constituting the fiber sheet in the one-way prepreg can be rearranged in response to the resin flow in a curved or bent portion when molding a composite material product. .
본 발명의 또 다른 과제는 복합재료 제품 성형시 복합재료의 설계를 용이하게 할 수 있으며 최종제품의 품질을 균일하게 할 수 있는 일방향성 프리프레그 및 그의 제조방법을 제공하는 것이다.Another object of the present invention is to provide a one-way prepreg and a method for manufacturing the same, which can facilitate the design of a composite material when molding a composite material product and uniform the quality of the final product.
이와 같은 과제를 달성하기 위해서, 본 발명에서는 필라멘트 상의 섬유들이 일방향으로 배열되어 있는 섬유시트 내에 수지를 균일하게 함침시켜 일방향성 프리프레그를 제조할 때, 상기 필라멘트 상의 섬유로 섬유길이 방향을 따라 크림프(Crimp)가 부여된 필라멘트 상의 섬유를 사용한다.In order to achieve such a problem, in the present invention, when preparing a unidirectional prepreg by uniformly impregnating a resin in a fiber sheet in which the fibers on the filament are arranged in one direction, crimp the fibers on the filament along the fiber length direction ( Crimp) is imparted on the filament.
본 발명으로 제조된 일방향성 프리프레그는 섬유시트를 구성하는 섬유에 크림프가 형성되어 있기 때문에 이를 사용하여 복합재료 제품을 성형할 때 곡선부분 또는 굴곡부분 등에서 수지 흐름에 적절하게 대응하도록 상기 섬유기재 내 섬유들의 재배열되는 성능이 뛰어나다.Since the unidirectional prepreg manufactured by the present invention has a crimp formed on the fibers constituting the fiber sheet, the fiber base material is used to appropriately respond to the resin flow in the curved part or the bent part when molding a composite material product using it. The fiber rearrangement performance is excellent.
그로 인해 성형된 복합재료 제품의 곡선부분 또는 굴곡부분에 섬유시트를 이루는 섬유의 양이 적게되거나 너트를 체결하기 위해 가공된 홀(Hole) 부분에서 섬유시트를 이루는 섬유가 절단되어 강도가 크게 저하되는 문제점들을 효과적으로 방지할 수 있다.As a result, the amount of fibers forming the fiber sheet in the curved part or the bent part of the formed composite product is reduced, or the fiber forming the fiber sheet is cut in the hole part processed to fasten the nut, resulting in a significant decrease in strength. Problems can be effectively prevented.
본 발명으로 제조된 일방향성 프리프레그를 사용하여 복합재료 제품을 성형하게 되면 복합재료의 설계가 용이하고, 최종제품의 품질 균일성이 크게 향상된다.When the composite material product is molded using the unidirectional prepreg manufactured by the present invention, the design of the composite material is easy, and the quality uniformity of the final product is greatly improved.
이하, 본 발명을 상세하게 설명한다.Hereinafter, the present invention will be described in detail.
본 발명은 필라멘트 상의 섬유들이 일방향으로 배열되어 있는 섬유시트 내에 수지를 균일하게 함침시켜 일방향성 프리프레그를 제조할 때, 상기 필라멘트 상의 섬유로 섬유길이 방향을 따라 크림프(Crimp)가 부여된 필라멘트 상의 섬유를 사용하는 것을 특징으로 한다.In the present invention, when preparing a unidirectional prepreg by uniformly impregnating a resin into a fiber sheet in which the fibers on the filament are arranged in one direction, the fibers on the filament are provided with a crimp along the fiber length direction with the fibers on the filament. It is characterized by using.
본 발명의 바람직한 구현일례로는 수지필름 상에 섬유길이방향을 따라 크림프(Crimp)가 부여된 필라멘트 상의 섬유들을 일방향으로 배열하여 섬유시트를 형성시킨 후 열처리하여 일방향성 프리프레그를 제조한다.In a preferred embodiment of the present invention, a fiber sheet is formed by arranging fibers on a filament with a crimp along the fiber length direction on a resin film in one direction, followed by heat treatment to produce a unidirectional prepreg.
섬유길이 방향을 따라 크림프가 부여된 필라멘트 상의 섬유(크림프 부여 섬유)는 섬유길이 방향으로 굴곡이 없는 필라멘트 상의 섬유를 기어가 맞물려 있는 로울러 등과 같은 크림프 부여장치 내로 통과시키는 방법으로 제조할 수 있다.The filament-like fibers (crimped-imparting fibers) that are crimped along the fiber length direction can be produced by passing the filament-like fibers without bending in the fiber length direction into a crimping apparatus such as a roller in which gears are engaged.
상기 수지는 열가소성 수지 또는 열경화성 수지 등이다.The resin is a thermoplastic resin or a thermosetting resin.
열경화성 수지로는 에폭시 수지 또는 페놀수지 등을 사용하고, 열가소성 수지로는 폴리아미드 수지, 폴리프로필렌 수지, 폴리에스테르 수지, 폴리락티드 수지, 폴리에틸렌 수지 등을 사용한다.Epoxy resin or phenol resin is used as the thermosetting resin, and polyamide resin, polypropylene resin, polyester resin, polylactide resin, polyethylene resin, etc. are used as the thermoplastic resin.
본 발명에서는 일방향성 프리프레그내 섬유시트의 함량이 35~85중량%인 것이 물성개선과 공정성 개선에 바람직하다.In the present invention, the content of the fiber sheet in the unidirectional prepreg is preferably 35 to 85% by weight for improving physical properties and improving processability.
본 발명으로 제조된 일방향성 프리프레그는 (ⅰ) 섬유길이 방향을 따라 크림프(Crimp)가 부여된 필라멘트 상의 섬유들이 일방향으로 배열되어 있는 섬유시트 및 (ⅱ) 상기 섬유시트 내에 함침되어 있는 수지로 구성된다.The unidirectional prepreg manufactured according to the present invention is composed of (i) a fiber sheet in which fibers on a filament with a crimp applied along the fiber length are arranged in one direction, and (ii) a resin impregnated in the fiber sheet do.
본 발명으로 제조된 일방향성 프리프레그는 섬유시트를 구성하는 섬유에 크림프가 형성되어 있기 때문에 이를 사용하여 복합재료 제품을 성형할 때 곡선부분 또는 굴곡부분 등에서 수지 흐름에 적절하게 대응하도록 상기 섬유시트 내 섬유들의 재배열되는 성능이 뛰어나다.Since the unidirectional prepreg manufactured by the present invention has a crimp formed on the fibers constituting the fiber sheet, when molding a composite material product by using it, the fiber sheet may properly respond to the resin flow in the curved part or the bent part. The fiber rearrangement performance is excellent.
그로 인해 성형된 복합재료 제품의 곡선부분 또는 굴곡부분에 섬유시트를 이루는 섬유의 양이 적게되거나 너트를 체결하기 위해 가공된 홀(Hole) 부분에서 섬유시트를 이루는 섬유가 절단되어 강도가 크게 저하되는 문제점들을 효과적으로 방지할 수 있다.As a result, the amount of fibers forming the fiber sheet in the curved part or the bent part of the formed composite product is reduced, or the fiber forming the fiber sheet is cut in the hole part processed to fasten the nut, resulting in a significant decrease in strength. Problems can be effectively prevented.
본 발명으로 제조된 일방향성 프리프레그를 사용하여 복합재료 제품을 성형하게 되면 복합재료의 설계가 용이하고, 최종제품의 품질 균일성이 크게 향상된다.When the composite material product is molded using the unidirectional prepreg manufactured by the present invention, the design of the composite material is easy, and the quality uniformity of the final product is greatly improved.
이하, 실시예 및 비교실시예를 통하여 본 발명을 구체적으로 살펴본다.Hereinafter, the present invention will be described in detail through Examples and Comparative Examples.
그러나 본 발명의 보호범위는 하기 실시예만으로 한정되는 것은 아니다.However, the scope of protection of the present invention is not limited to the following examples.
실시예Example 1 One
필라멘트 상의 아라미드 섬유를 기어가 맞물려 있는 로울러(크림프 부여장치) 사이로 통과시키면서 섬유길이 방향을 따라 크림프가 형성된 필라멘트 상의 아라미드 섬유(크림프 부여 아라미드 섬유)를 제조하였다.Filament-shaped aramid fibers (crimped aramid fibers) having a crimp formed along the fiber length direction were prepared while passing the filament-shaped aramid fibers through rollers (crimp imparting devices) in which gears are engaged.
다음으로는, 상기 크림프 부여 아라미드 섬유들을 일방향으로 평행하게 배열하여 섬유시트를 제조하였다.Next, the crimped aramid fibers were arranged in parallel in one direction to prepare a fiber sheet.
다음으로는, 상기 섬유시트 상에 에폭시 수지 필름을 적층한 다음 110℃로 열처리하여 상기 섬유시트 내에 에폭시 수지가 함침된 일방향성 프리프레그를 제조하였다.Next, an epoxy resin film was laminated on the fiber sheet and then heat treated at 110° C. to prepare a unidirectional prepreg impregnated with an epoxy resin in the fiber sheet.
다음으로는, 상기 일방향성 프리프레그를 사각형 맨드럴의 축 방향을 1회 감아주는 15회 반복실시한 후, 열풍오븐에서 일방향성 프리프레그내 에폭시 수지를 경화시킨 후 맨드럴과 맨드럴 위에 형성된 프리프레그 적층체를 분리하여 자동차 도어용 임팩트 빔(복합재료 성형품)을 제조하였다.Next, the unidirectional prepreg was repeated 15 times in which the axial direction of the square mandrel was wound once, and the epoxy resin in the unidirectional prepreg was cured in a hot air oven, and then the prepreg formed on the mandrel and the mandrel. The laminate was separated to prepare an impact beam for an automobile door (a composite material molded article).
비교실시예Comparative Example 1 One
섬유길이 방향을 따라 크림프가 형성된 필라멘트 상의 아라미드 섬유(크림프 부여 아라미드 섬유)를 사용하는 대신에 섬유길이 방향을 따라 크림프가 형성되지 않은 통상의 필라멘트상 아라미드 섬유를 사용한 것을 제외하고는 실시예 1과 동일한 방법으로 일방향성 프리프레그 및 자동차 도어용 임팩트 빔(복합재료 성형품)을 제조하였다.The same as in Example 1, except that instead of using the aramid fiber (crimped aramid fiber) on the filament having crimped along the fiber length direction, a conventional filamentary aramid fiber without crimping along the fiber length direction was used. By the method, a unidirectional prepreg and an impact beam for an automobile door (molded composite material) were prepared.
실시예 1로 제조된 자동차 도어용 임팩트 빔(복합재료 성형품)은 굴곡(곡선) 부분과 직선부분 모두 단위면적당 아라미드 섬유의 양이 비슷하였다. In the impact beam (molded composite material) for automobile doors manufactured in Example 1, the amount of aramid fibers per unit area was similar in both the curved (curved) portion and the straight portion.
한편, 비교실시예 1로 제조된 자동차 도어용 임팩트 빔(복합재료 성형품)은 굴곡(곡선) 부분의 단위면적당 아라미드 섬유의 양이 직선부분의 단위면적당 아라미드 섬유의 양보다 20% 적었다.On the other hand, the impact beam (composite material molded product) for automobile doors prepared in Comparative Example 1 had an amount of aramid fibers per unit area of the curved (curved) portion being 20% less than the amount of aramid fibers per unit area of the straight portion.
그 결과, 실시예 1로 제조된 자동차 도어용 임팩트 빔(복합재료 성형품)은 비교실시예 1로 제조된 자동차 도어용 임팩트 빔(복합재료 성형품) 보다 상대적으로 강도 균일성이 우수하였다.As a result, the impact beam for automobile doors (molded composite material) manufactured in Example 1 was relatively superior in strength uniformity than the impact beam for automotive doors (molded composite material) manufactured in Comparative Example 1.
Claims (5)
상기 필라멘트 상의 섬유로 섬유길이 방향을 따라 크림프(Crimp)가 부여된 필라멘트 상의 섬유를 사용하는 것을 특징으로 하는 일방향성 프리프레그의 제조방법.In preparing a one-way prepreg by uniformly impregnating a resin in a fiber sheet in which the fibers on the filament are arranged in one direction,
The method for producing a one-way prepreg, characterized in that using filament-like fibers to which crimp is applied along the fiber length direction as the filament-like fibers.
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