KR20150124696A - Ecofriendly thermoplastic felt laminate for car interior substrate - Google Patents
Ecofriendly thermoplastic felt laminate for car interior substrate Download PDFInfo
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- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 25
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 25
- 239000000758 substrate Substances 0.000 title claims description 9
- 239000000835 fiber Substances 0.000 claims abstract description 98
- 239000004743 Polypropylene Substances 0.000 claims abstract description 45
- -1 polypropylene Polymers 0.000 claims abstract description 45
- 229920001155 polypropylene Polymers 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 37
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 239000006260 foam Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 229920001400 block copolymer Polymers 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000004626 polylactic acid Substances 0.000 abstract description 47
- 229920000747 poly(lactic acid) Polymers 0.000 abstract description 46
- 238000000034 method Methods 0.000 abstract description 14
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 235000011777 Corchorus aestuans Nutrition 0.000 description 10
- 235000010862 Corchorus capsularis Nutrition 0.000 description 10
- 240000000491 Corchorus aestuans Species 0.000 description 8
- 238000002156 mixing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 238000009960 carding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 240000004792 Corchorus capsularis Species 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
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Classifications
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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
- 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
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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
- 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
- B32B5/18—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 features of a layer of foamed material
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
-
- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0253—Polyolefin fibres
-
- 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
- B32B2605/00—Vehicles
- B32B2605/003—Interior finishings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
Description
본 발명은 자동차 내장 기재용 펠트에 관한 것으로, 특히 자동차 내장 기재용 친환경 열가소성 펠트 적층물에 관한 것이다.BACKGROUND OF THE
근래의 산업 발전 속도의 급속함에 따른 환경오염 문제로 인하여 친환경적 특성과 고강성 및 경량성을 가지면서도 공정 개선을 통한 원가 절감이 가능한 소재 개발이 중요한 이슈가 되고 있다. Due to the environmental pollution problem due to the rapid pace of industrial development in recent years, development of materials capable of reducing costs through process improvement while having environment-friendly characteristics, high rigidity and light weight is becoming an important issue.
헤드라이너(Head Liner), 리어쉘프(Rear Shelf), 패키지트레이(Package Tray), 도어트림(Door Trim), 인스트루먼트 판넬(Instrument Panel), 필러트림(Pillar Trim)과 같은 자동차 내장재는 기재와 표피재를 접합한 메인 판넬(Main Panel)로서, 여러 가지 부착물(스위치, 스피커, 램프, 공조부품 및 장식)을 조립한다. 또한 최근에 이슈가 되고 있는 자동차 실내 공기 규제는 친환경 소재로 접근하는 과정이 아닌 필수 항목이다.An automobile interior material such as a head liner, a rear shelf, a package tray, a door trim, an instrument panel, and a pillar trim is used as a base material and a skin material (A switch, a speaker, a lamp, an air conditioning part, and a decoration) as a main panel to which a speaker is attached. In addition, the recent issue of indoor air regulation is indispensable, not a process to approach environmentally friendly materials.
따라서 자동차용 내장재의 기재는 내장재 형상유지와 여러 가지 부품을 체결할 수 있도록 충분한 강성이 있어야 하며, 차량 사고시 파손에 의해 날카로운 모서리가 형성되지 않으며, 내충격성이 높아 외부 에너지를 흡수할 수 있어야 한다. 또한, 연비 향상을 위한 경량성, 생분해가 가능한 친환경성, 재활용 또는 폐기 처분이 용이하고, 생산 공정시 독성물질이 배출되지 않으며, 경비 절감이 용이한 특성을 갖는 것이 바람직하다.Therefore, the base material of the automobile interior material should have enough rigidity to hold the interior material shape and fasten various parts, do not form sharp edges due to breakage in the event of a car accident, and have high impact resistance to absorb external energy. In addition, it is preferable that it is lightweight for improving fuel efficiency, eco-friendly for biodegradation, easy to recycle or dispose of, does not emit toxic substances during the production process, and has a feature of easy cost saving.
종래의 자동차 기재의 한 예로 레진펠트(Resin Felt)와 우드파이버(Wood Fiber) 소재를 열 프레스로 가열 가압하여 성형된 기재가 있다. 이 기재는 페놀 수지의 열 경화성을 촉진하기 위해 헥사민이라는 경화제가 첨가된다. 이 물질은 분해 반응시에 아민, 암모니아류 등의 부산물이 생성되며 악취의 요인으로 인체에 유해한 재료라는 단점이 있다.As an example of a conventional automobile substrate, there is a base material molded by heating and pressing Resin Felt and wood fiber materials with a hot press. This substrate is added with a curing agent called hexamine in order to promote the thermosetting property of the phenolic resin. This material has the disadvantage that it is a harmful material to the human body as a cause of odor, since by-products such as amines and ammonia are generated during the decomposition reaction.
또 다른 종래의 기술의 예로, 천연섬유와 폴리프로필렌의 혼합펠트층에 기포지를 결합한 펠트 구조물이 있다(KR 0361026B1). 이 기술에 기재된 펠트 구조물은 천연섬유를 포함함으로써, 일반 플라스틱에 비해 친환경적이며, 경량화를 이룰 수 있고, 강성도 부여할 수 있으나, 여전히 분해되는데 비교적 장기간이 소요되어 재사용 및 폐기처분에도 용이치 못한 문제가 있다. 또한, 이 기술은 혼합 펠트층의 구성이 폴리프로필렌 섬유와 천연섬유(황마)의 상용성이 저하되어, 공정 시간이 길어지며, 비용 절감이 용이하지 못하는 문제점이 있다.Another example of a conventional technique is a felt structure in which a bubble paper is bonded to a mixed felt layer of natural fibers and polypropylene (KR 0361026B1). The felt structure described in this technology can be made environmentally friendly, lighter, and stiffer than ordinary plastics by including natural fibers, but it still takes a relatively long time to decompose, which is not suitable for reuse and disposal have. In addition, this technology has a problem that the composition of the mixed felt layer is poor in compatibility between the polypropylene fiber and the natural fiber (jute), the process time is prolonged, and the cost is not easily reduced.
따라서 본 발명의 목적은 생분해성이 가능한 친환경 소재이며, 혼합 섬유(폴리프로필렌 섬유, PLA 섬유, 천연 섬유)간의 상용성이 우수하여 고강성 경량화가 가능한 자동차 내장 기재용 친환경 열가소성 펠트 적층물을 제공하는 것이다. 또 다른 목적은 제조 공정시 우수한 성형성에 의해 내장재 공정 시간을 단축하여 공정 비용이 낮아지는 자동차 내장 기재용 열가소성 펠트를 제공하는 것을 목적으로 한다.Accordingly, an object of the present invention is to provide an eco-friendly thermoplastic felt laminate for an automobile interior base material that is biocompatible and is highly compatible with mixed fibers (polypropylene fiber, PLA fiber, natural fiber) will be. Another object of the present invention is to provide a thermoplastic felt for an automotive interior base material, which reduces the processing time of the interior material due to excellent moldability in the manufacturing process, thereby lowering the process cost.
본 발명은 상기 과제를 해결하기 위한 수단으로서, 천연 섬유, PLA 섬유 및 폴리프로필렌 섬유를 혼합한 혼합 펠트층과, 상기 혼합 펠트층의 일면 또는 양면에 부착된 PLA 수지 또는 PLA 수지와 폴리프로필렌으로 구성된 기포지로 이루어진 것을 특징으로 하는, 자동차 내장 기재용 친환경 열가소성 펠트 적층물을 제공한다.The present invention provides, as means for solving the above-mentioned problems, a laminated sheet comprising a mixed felt layer in which natural fibers, PLA fibers and polypropylene fibers are mixed, and PLA resin or PLA resin and polypropylene adhered to one or both sides of the mixed felt layer The present invention provides an eco-friendly thermoplastic felt laminate for an automotive interior base material, which is made of a foamed paper.
본 발명은, 상기 혼합 펠트층의 한 면에 부착된 PLA 수지 또는 PLA 수지와 폴리프로필렌으로 구성된 기포지를 갖는 매트 2매를 기포지가 없는 면을 서로 맞대어 결합한, 자동차 내장 기재용 친환경 열가소성 펠트 적층물을 더욱 제공한다The present invention relates to an environmentally friendly thermoplastic felt laminate for an automobile interior base material, wherein two matte pieces each having a base fabric composed of a PLA resin or a PLA resin and a polypropylene adhered to one side of the above mixed felt layer are bonded to each other with a base Offer more
상기 PLA 섬유는 굵기가 6~15데니어이며, 길이는 45~80㎜일 수 있다. The PLA fibers may have a thickness of 6 to 15 deniers and a length of 45 to 80 mm.
상기 섬유의 함량은 천연섬유 10~30wt%, PLA 섬유 20~40wt%, 폴리프로필렌 섬유 40~60wt%일 수 있다. The content of the fibers may be 10 to 30 wt% of natural fibers, 20 to 40 wt% of PLA fibers, and 40 to 60 wt% of polypropylene fibers.
상기 폴리프로필렌 섬유는 굵기가 6~15데니어이며, 길이는 45~80㎜일 수 있다. The polypropylene fiber may have a thickness of 6 to 15 deniers and a length of 45 to 80 mm.
상기 폴리프로필렌 수지는 호모(Homo), 블록(Block Co-Polymer) 및 고결정성 폴리프로필렌 중에서 선택될 수 있다. The polypropylene resin may be selected from Homo, Block Co-Polymer and highly crystalline polypropylene.
상기 기포지의 면적 중량은 50~150g/㎡일 수 있다. The area weight of the foam paper may be 50 to 150 g /
또한, 상기 기포지의 부착이나 혼합 펠트층의 결합은 니들펀칭에 의해 이루어질 수 있다. Further, attachment of the foam paper or bonding of the mixed felt layer can be accomplished by needle punching.
본 발명의 펠트 적층물은, 혼합 섬유 중 PLA 섬유를 함유함으로써 폐기물 기재의 생분해가 이루어지며, 제조공정상 인체에 무해한 소재로 구성된 친환경 성형기재를 얻을 수 있으며, 혼합 섬유(폴리프로필렌 섬유, PLA 섬유, 천연섬유)간의 상용성이 우수하여 고강성 경량화가 가능하고, 성형성이 우수하여 공정시간(Cycle Time)의 단축으로 생산 비용을 절감할 수 있으며, 공정 자체도 친환경적인 자동차 내장 기재용 열가소성 펠트 적층 복합물을 생산할 수 있다.The felt laminate according to the present invention can obtain an environmentally friendly molded base material composed of a material harmless to the normal human body through the biodegradation of the waste base material by containing the PLA fiber among the mixed fibers. The mixed fiber (polypropylene fiber, PLA fiber, Natural fibers) can be made highly rigid and lightweight, and the moldability is excellent, which can reduce the production cost by shortening the cycle time, and the process itself is environmentally friendly. The thermoplastic felt laminate Complexes.
도 1은 본 발명에 따른 차량 내장 기재용 친환경 열가소성 펠트 적층물의 일 실시예로서, 합치 전 적층물의 구조를 나타낸 단면도이다.
도 2은 상기 실시예에 있어서, 합치 후 적층물의 구조를 나타낸 단면도이다. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing the structure of a pre-combination laminate as one embodiment of an environmentally-friendly thermoplastic felt laminate for a vehicle interior substrate according to the present invention.
Fig. 2 is a cross-sectional view showing the structure of the post-alignment laminate in the above embodiment.
이하, 도면을 참조하여 본 발명을 보다 구체적으로 설명한다.
Hereinafter, the present invention will be described more specifically with reference to the drawings.
본 발명은 상기 과제를 해결하기 위한 수단으로서, 천연 섬유, PLA 섬유 및 폴리프로필렌 섬유를 혼합한 혼합 펠트층과, 상기 혼합 펠트층의 일면 또는 양면에 부착된 PLA 수지 또는 PLA 수지와 폴리프로필렌으로 구성된 기포지로 이루어진 것을 특징으로 하는, 자동차 내장 기재용 친환경 열가소성 펠트 적층물을 제공한다.The present invention provides, as means for solving the above-mentioned problems, a laminated sheet comprising a mixed felt layer in which natural fibers, PLA fibers and polypropylene fibers are mixed, and PLA resin or PLA resin and polypropylene adhered to one or both sides of the mixed felt layer The present invention provides an eco-friendly thermoplastic felt laminate for an automotive interior base material, which is made of a foamed paper.
이 때, 본 발명은 도 1 및 도 2에 보인 바와 같이, 상기 혼합 펠트층의 한 면에 부착된 PLA 수지 또는 PLA 수지와 폴리프로필렌으로 구성된 기포지를 갖는 매트 2매를 기포지가 없는 면을 서로 맞대어 결합한 것일 수 있다. At this time, as shown in Figs. 1 and 2, the present invention is characterized in that two sheets of matte having PLA resin or PLA resin attached to one side of the mixed felt layer and a base fabric composed of polypropylene, It can be combined.
천연섬유는 특별히 제한되지는 않고, 예를 들어, 마 섬유중에서 강도와 내구성이 우수하며 생산성이 좋은 황마 등을 사용할수 있다. 천연섬유 사용시 굵기는 40~120㎛이고, 길이가 45~80㎜ 로 컷팅된 것이 바람직하다. The natural fibers are not particularly limited, and for example, jute fibers having excellent strength and durability and good productivity can be used. When natural fibers are used, it is preferable that the thickness is 40 to 120 mu m and the length is cut to 45 to 80 mm.
폴리프로필렌 섬유는 굵기가 6~15데니어 이며, 길이는 45~80㎜ 인 것이 바람직하다. 만일 폴리프로필렌 섬유의 굵기가 6데이너 이하의 가는 섬유를 사용하면 카딩 작업성이 원활하지 못하며, 15데니어 이상의 섬유를 사용하면 균일한 분산에 의한 혼합이 어려워진다. The polypropylene fiber preferably has a thickness of 6 to 15 deniers and a length of 45 to 80 mm. If fine fibers having a fiber diameter of 6 or less are used, the carding workability is not smooth. If fibers having 15 denier or more are used, mixing by uniform dispersion becomes difficult.
상기 PLA 섬유는 굵기가 6~15데니어 이며, 길이는 45~80㎜인 것이 바람직하다. 만일 6데니어 이하의 가는 섬유를 사용하면 폴리프로필렌 섬유와 같이 카딩 작업이 원활하지 못하며, 가는 섬유끼리 뭉쳐 분산성이 저하된다. 15데니어 이상의 굵은 섬유를 사용하면 단위 면적당의 중량 편차가 심하여 가공 시 불량율을 높이는 원인이 될 수 있다. 마지막으로 상기 PLA 수지 또는 PLA 수지와 폴리프로필렌 기포지는 면적 중량이 50~150g/㎡ 인 것이 효과적이다.The PLA fiber preferably has a thickness of 6 to 15 deniers and a length of 45 to 80 mm. If fibers having a size of 6 deniers or less are used, the carding operation is not smooth as in the case of polypropylene fibers. If thick fibers of 15 denier or more are used, the weight deviation per unit area is significant, which may cause the defect rate to increase during processing. Finally, it is effective that the area weight of the PLA resin or the PLA resin and the polypropylene foam is 50 to 150 g /
또한, 상기 섬유의 함량은 천연섬유 10~30wt%, PLA 섬유 20~40wt%, 폴리프로필렌 섬유 40~60wt% 인 것이 바람직하다.
The content of the fibers is preferably 10 to 30 wt% of the natural fibers, 20 to 40 wt% of the PLA fibers, and 40 to 60 wt% of the polypropylene fibers.
이하에서는 첨부 도면을 참조하여 본 발명에 대해 보다 상세히 설명한다. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 의한 자동차 내장 기재용 친환경 열가소성 펠트의 합치 전 적층물의 구조 및 공정을 나타낸 단면도이다. 도면에 도시된 바와 같이, 본 발명의 열가소성 펠트 적층물은 천연섬유(황마 섬유) : PLA 섬유 : 폴리프로필렌 섬유를 1~3 : 2~4 : 4~6의 중량 비율로 배합한 혼합 펠트층(21, 22)과 상기 펠트층(21, 22)의 일면에 부착된 PLA 수지 또는 PLA 수지와 폴리프로필렌 기포지(1)를 갖는 매트를 화살표 방향으로 합치하여 도 2의 완성된 열가소성 펠트 적층물이 완성된다.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a structure and a process of a pre-combination laminate of an environmentally-friendly thermoplastic felt for automotive interior decoration according to the present invention. Fig. As shown in the figure, the thermoplastic felt laminate according to the present invention is a mixed felt layer (hereinafter referred to as a " mixed felt layer ") comprising a natural fiber (jute fiber): PLA fiber: polypropylene fiber in a weight ratio of 1: 3: 2 to 4: 21 and 22 and a PLA resin or a PLA resin attached to one surface of the
도 2의 혼합 펠트층(2)의 천연 섬유, PLA 섬유 및 폴리프로필렌 섬유의 혼합 비율에 있어서, 천연 섬유는 내장 기재의 강도와 강성, 내충격성을 담당하며, PLA 섬유는 매립시 생분해, 폴리프로필렌 섬유와의 결합력 강화에 따른 강성 증대, 공정 시간 단축 및 청정 작업 조건 조성을 담당한다. 폴리프로필렌 섬유는 기재 성형시 PLA 섬유와 같이 용융되어 천연 섬유들의 결속력을 높이는 결합재 역할 및 내장 기재의 성형성을 부여하는 역할을 한다. 여기서 세가지 섬유의 혼합 비율 중 천연 섬유의 비율이 높으면 지나치게 강성이 높아지고 성형성이 부족해지며, PLA 섬유의 비율이 높으면 내열성이 저하될 수 있으며, 폴리프로필렌 섬유의 비율이 높으면 성형성은 우수하지만 강성이 저하하여 성형 제품의 변형 및 처짐이 발생할 수 있다.
In the mixing ratio of the natural fibers, PLA fibers and polypropylene fibers of the mixed
도 2의 기포지(1)는 PLA 수지 또는 PLA 수지와 호모폴리머 폴리프로필렌으로 구성되며, 면적 중량은 50~150g/㎡ 이다. 기포지(1)는 혼합 펠트층(2)의 표면에 위치하여 내장재 성형 공정에서 가열가압할 때 펠트층 표면에 흡수되어 치밀한 기재 표면을 형성한다. 또한, 상판과 하판의 대칭성에 의해 비틀림 변형 방지에 효과적이다. 기포지의 혼합 펠트층 위로의 부착은 니들펀칭에 의하여 이루어질 수 있다.
The
이렇게 제작된 자동차 내장 기재용 친환경 열가소성 펠트의 적층물(도 2)을 자동차 내장 기재로 성형하는 경우에는, 예를 들어, 180~230℃로 설정된 열간 프레스로 가열 가압한다. 이때 가열 가압 조건은 펠트 중심부의 온도가 170~190℃에 도달하는 시간이 35~85초 정도로 하는데, 이는 종래의 가열 가압 조건인 40~90 초에 비해 5초 이상 단축된 시간으로 공정 시간의 단축에 따른 원가 절감의 효과를 볼 수 있다. 가열 가압 평판 금형 사이의 간격이 최종 기재 두께의 1.2~1.8배 정도로 설정하며, 가압력은 1~5Kgf/㎠ 정도의 범위로 조정하여 제조한다.
In the case of forming a laminate (Fig. 2) of the eco-friendly thermoplastic felt for automobile interior base material manufactured in this manner with an automobile built-in substrate, it is heated and pressurized, for example, by a hot press set at 180 to 230 占 폚. In this case, the time required for the temperature of the felt to reach 170 to 190 ° C is about 35 to 85 seconds, which is shortened by 5 seconds or more compared to 40 to 90 seconds which is a conventional heating and pressurizing condition, The cost reduction effect can be seen. The distance between the heated pressurized flat metal molds is set to about 1.2 to 1.8 times the thickness of the final substrate, and the pressing force is adjusted in the range of about 1 to 5 kgf / cm < 2 >.
가열 가압한 자동차 내장 기재용 친환경 열가소성 펠트 적층물은 성형 프레스와 냉각수가 순환하는 냉각성형 금형 사이로 이송하여 원하는 형태의 내장 기재로 성형된다. 냉각 성형시 필요에 따라 표피재와 가열 가압한 열가소성 펠트 적층물을 동시에 넣고 성형할 수도 있다.
The eco-friendly thermoplastic felt laminate for heating and pressurized automotive interior materials is transferred to a cooling molding die through which a molding press and cooling water are circulated to be formed into a desired type of built-in substrate. If desired, the skin material and the thermoplastic felt laminate heated and pressurized may be simultaneously injected during the cooling molding.
아래에 본 발명에 따른 실시예를 비교 분석한 실험예이다.
The following is an experimental example in which the embodiment according to the present invention is comparatively analyzed.
천연섬유로, 평균 굵기가 80㎛ 이며, 길이가 60㎜ 로 컷팅된 황마섬유를 사용하였다. PLA 섬유와 폴리프로필렌 섬유는 6 데니어의 섬유 굵기와 65㎜ 의 길이를 갖는 것을 선택했고, 폴리프로필렌 섬유는 호모폴리머 수지를 사용하였다. Jute fibers having an average thickness of 80 占 퐉 and a length of 60 mm were used as natural fibers. The PLA fiber and the polypropylene fiber were selected to have a fiber diameter of 6 denier and a length of 65 mm, and a homopolymer resin was used for the polypropylene fiber.
황마 섬유, PLA 섬유 그리고 폴리프로필렌 섬유의 혼함 비율 및 폴리프로필렌 기포지의 혼합 비율은 표 1에 나타내었다. 섬유의 굵기가 6~15데니어이며, 길이는 45~80㎜인 폴리프로필렌 및 PLA 섬유를 표1의 혼합 비율로 혼합하여 공정에 투입하고, 벌크(Bulk) 단위로 입고된 황마 섬유는 굵기가 40~120㎛이며, 길이를 45~80㎜ 로 제단하여 폴리프로필렌 및 PLA 섬유와 다시 혼합하여, 일정한 카딩(찢어서 펼쳐놓음) 과정을 거친다. 이렇게 카딩된 혼합 펠트는 적층 공정 및 니들펀치 공정을 거치게 되고, 마지막으로 PLA 수지 또는 PLA 수지와 폴리프로필렌으로 제작된 기포지와 합치된다.The mixing ratio of the jute fibers, the PLA fibers and the polypropylene fibers, and the mixing ratio of the polypropylene base paper are shown in Table 1. Polypropylene and PLA fibers having a fiber thickness of 6 to 15 deniers and a length of 45 to 80 mm were mixed in the mixing ratios shown in Table 1 and the jute fibers received in a bulk unit had a thickness of 40 ~ 120 탆 length, 45 ~ 80 mm in length, mixed again with polypropylene and PLA fibers, and subjected to a constant carding (tear-out) process. The carded mixed felt is subjected to a laminating process and a needle punching process, and finally, conforms to a prepreg made of PLA resin or PLA resin and polypropylene.
표 1의 조성에 따라 제작된 펠트의 물성 결과는 표2에 나타내었다.The physical properties of the felt produced according to the composition of Table 1 are shown in Table 2.
※ MS (Material Specification): 현대자동차 시험 규격
※ MS (Material Specification): Hyundai Motor Test Specification
표 2의 결과와 같이 종래 기술의 중량 대비 실시예의 중량 상승 비율이 7%에 비해 물성(굴곡 강도, 굴곡 탄성율) 상승 비율은 30% 내외로 강성이 상승하는 결과를 확인할 수 있다. 따라서 혼합 펠트층의 상용성에 따른 물성 향상을 확인할 수 있으며, 동일 중량에서의 경량화도 가능하다. 본 발명의 펠트 적층물은 상기한 물성적 장점과 더불어, PLA 섬유의 생분해성 특징이 가지는 장점을 가지는 점에서 그 의의가 있다.
As shown in Table 2, it can be seen that the increase rate of the physical properties (flexural strength, flexural modulus) is 30% or more, compared with the weight increase ratio of 7% of the weight of the prior art. Therefore, it is possible to confirm the improvement of the physical properties according to the compatibility of the mixed felt layer, and it is also possible to reduce the weight at the same weight. The felt laminate of the present invention is of significance in that it has the advantages of the biodegradable characteristics of the PLA fibers, together with the physical properties mentioned above.
1 : PLA 수지 또는 PLA 수지와 폴리프로필렌 기포지
2 : 폴리프로필렌 섬유, PLA 섬유 그리고 황마 섬유를 혼합한 펠트층
21 : 합치 전 폴리프로필렌 섬유, PLA 섬유 그리고 황마 섬유를 혼합한 펠트층 상판
22 : 합치 전 폴리프로필렌 섬유, PLA 섬유 그리고 황마 섬유를 혼합한 펠트층 하판1: PLA resin or PLA resin and polypropylene prepreg
2: felt layer mixed with polypropylene fiber, PLA fiber and jute fibers
21: Felt layer with polypropylene fiber, PLA fiber and jute fibers mixed before the top plate
22: Felt layer bottom plate mixed with polypropylene fiber, PLA fiber and jute fibers before coalescence
Claims (9)
Claims [1] An automobile built-in substrate produced by pressurizing and heating an environmentally-friendly thermoplastic felt laminate for an automobile interior base material according to claim 1 or 2 at 180 to 230 캜.
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