KR101923379B1 - 차량용 언더바디 커버 및 이를 제조하는 방법 - Google Patents
차량용 언더바디 커버 및 이를 제조하는 방법 Download PDFInfo
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- KR101923379B1 KR101923379B1 KR1020150091973A KR20150091973A KR101923379B1 KR 101923379 B1 KR101923379 B1 KR 101923379B1 KR 1020150091973 A KR1020150091973 A KR 1020150091973A KR 20150091973 A KR20150091973 A KR 20150091973A KR 101923379 B1 KR101923379 B1 KR 101923379B1
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- vehicle
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- fibrous particles
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Landscapes
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Abstract
Description
도 2는 본 발명의 다른 구현예에 따른 차량용 언더바디 커버 중 중심층에 대한 개략적인 모식도이다.
도 3은 본 발명의 또 다른 구현예에 따른 차량용 언더바디 커버의 제조 방법 중 강화 섬유와 이성분 폴리머에 열과 압력을 가해 중심층이 형성되는 것을 도시화한 것이다.
도 4는 본 발명의 또 다른 구현예에 따라 차량용 언더바디 커버의 제조 방법을 모식적으로 나타낸 도면이다.
도 5는 본 발명의 또 다른 구현예에 따라 차량용 언더바디 커버의 제조 방법 중 중심층 제조에 사용되는 실시예 1 및 실시예 2에서 제조된 다공성 예비성형 보드 내부의 SEM 사진이다.
도 6은 본 발명의 또 다른 구현예에 따라 차량용 언더바디 커버의 제조 방법 중 중심층 제조에 사용되는 실시예 1 및 실시예 2에서 제조된 다공성 예비성형 보드의 절단면에서 유리 섬유의 단면을 확대한 SEM 사진이다.
구분 | 인장강도 (MPa) | 인장탄성률 (GPa) |
실시예 1 | 33 | 2.5 |
실시예 2 | 56 | 3.4 |
실시예 3 | 22 | 1.5 |
실시예 4 | 43 | 2.7 |
비교예 1 | 23 | 1.7 |
비교예 2 | 38 | 3.1 |
비교예 3 | 17 | 1.2 |
구분 | 굴곡강도 (MPa) | 굴곡탄성률 (GPa) |
실시예 5 | 23 | 1.9 |
실시예 6 | 26 | 1.6 |
실시예 7 | 15 | 1.4 |
실시예 8 | 17 | 1.5 |
비교예 4 | 17 | 0.9 |
비교예 5 | 22 | 1.5 |
비교예 6 | 17 | 0.8 |
충격강도 측정 [Total NTT (J/mm)] |
실시예 1 | 비교예 1 | 비교예 3 |
지점 1 | 1.8 | 1.6 | 1.7 |
지점 2 | 1.9 | 1.8 | 1.9 |
지점 3 | 1.7 | 1.4 | 2.1 |
지점 4 | 1.8 | 2.0 | 1.8 |
지점 5 | 1.8 | 1.6 | 1.2 |
최대 차이 = {최대값-최소값} | 0.2 | 0.6 | 0.9 |
구분 | 평균흡음계수 |
실시예 1 | 0.19 |
비교예 1 | 0.17 |
비교예 3 | 0.14 |
2: 제2 섬유상 입자
3: 결착재
4: 강화 섬유
5: 이성분 폴리머 섬유
5a: 코어부
5b: 시스부
10: 중심층
20: 다공성 강화섬유 복합재
30, 40: 피복층
50: 접착층
100: 차량용 언더바디 커버
Claims (34)
- 중심층; 및 상기 중심층의 양면에 배치된 피복층;을 포함하고,
상기 중심층은 제1 섬유상 입자; 제2 섬유상 입자; 및 상기 제1 섬유상 입자와 상기 제2 섬유상 입자를 결착시키는 결착재를 포함하고,
상기 제1 섬유상 입자와 상기 제2 섬유상 입자는 상기 결착재에 의해 결착되어 기공을 포함하는 불규칙한 망목 구조를 형성하고,
상기 제1 섬유상 입자는 무기 섬유 또는 유기 섬유이고,
상기 제2 섬유상 입자는 제1 열가소성 수지를 포함하고,
상기 결착재는 제2 열가소성 수지를 포함하고,
상기 제1 열가소성 수지의 융점이 상기 제2 열가소성 수지의 융점보다 높고,
상기 중심층에서, 상기 제1 섬유상 입자의 함량 대 상기 제2 섬유상 입자와 상기 결착재의 함량의 합의 중량비가 20 : 80 내지 60 : 40 이고,
상기 제1 열가소성 수지의 비중이 1보다 큰
차량용 언더바디 커버.
- 제1항에 있어서,
상기 중심층에서,
상기 제1 섬유상 입자 및 상기 제2 섬유상 입자는 각각의 입자 표면에 상기 결착재에 의해 일부 또는 전체가 코팅되어 코팅부를 형성하고, 상기 각각의 표면에 형성된 코팅부가 서로 융착되어 결착된
차량용 언더바디 커버.
- 삭제
- 제1항에 있어서,
상기 중심층에서,
상기 제2 섬유상 입자 100 중량부 대비하여 상기 결착재의 중량은 50 중량부 내지 250 중량부인
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제1 섬유상 입자 및 상기 제2 섬유상 입자는 일 방향 배향성을 갖는
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제1 섬유상 입자는 유리 섬유, 아라미드 섬유, 탄소 섬유, 탄소 나노튜브, 보론 섬유, 금속 섬유 및 이들의 조합으로 이루어진 군으로부터 선택된 적어도 하나를 포함하는
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제1 섬유상 입자는 단면 직경이 5 ㎛ 내지 40 ㎛
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제1 섬유상 입자는 길이가 1 mm 내지 50 mm인
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제1 열가소성 수지는 폴리에스테르, 폴리프로필렌(PP), 폴리에틸렌(PE), 아크릴부타디엔스티렌(ABS), 폴리카보네이트 (PC), 나일론(Nylon), 폴리염화비닐(PVC), 폴리스티렌(PS), 폴리우렌탄(PU), 폴리메틸메타아크릴레이트(PMMA), 폴리락틱산(PLA), 테플론(polytetrafluoroethylene) 및 이들의 조합으로 이루어진 군으로부터 선택된 적어도 하나를 포함하는
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제2 열가소성 수지는 폴리에스테르, 폴리에틸렌, 폴리프로필렌, 폴리에틸렌(PE), 아크릴부타디엔스티렌(ABS), 폴리카보네이트(PC), 나일론(Nylon), 폴리염화비닐(PVC), 폴리스티렌(PS), 폴리우렌탄(PU), 폴리메틸메타아크릴레이트(PMMA), 폴리락틱산(PLA), 테플론(polytetrafluoroethylene) 및 이들의 조합으로 이루어진 군으로부터 선택된 적어도 하나를 포함하는
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제1 열가소성 수지의 융점이 160℃ 이상인
차량용 언더바디 커버.
- 삭제
- 제1항에 있어서,
상기 제2 열가소성 수지의 융점이 200℃ 미만인
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제2 섬유상 입자는 단면 직경이 5 ㎛ 내지 30 ㎛
차량용 언더바디 커버.
- 제1항에 있어서,
상기 제2 섬유상 입자는 길이가 1 mm 내지 50 mm인
차량용 언더바디 커버.
- 제1항에 있어서,
상기 중심층의 기공도가 30 내지 90 부피%인
차량용 언더바디 커버.
- 제1항에 있어서,
상기 중심층의 밀도가 0.1 g/cm3 내지 1.6 g/cm3 인
차량용 언더바디 커버.
- 제1항에 있어서,
상기 중심층은 600 g/m2 내지 3000 g/m2 의 평량을 갖는
차량용 언더바디 커버.
- 제1항에 있어서,
상기 피복층은 부직포, 단열 표피재, 타공 시트 및 이들의 조합으로 이루어진 군으로부터 선택된 적어도 하나를 포함하는
차량용 언더바디 커버.
- 제1항에 있어서,
상기 피복층과 상기 중심층 사이에 상기 피복층과 상기 중심층을 부착하는 접착층을 더 포함하는
차량용 언더바디 커버.
- 강화 섬유 및 이성분 폴리머 섬유를 산 수용액에 분산시켜 슬러리 용액을 준비하는 단계;
상기 슬러리 용액으로부터 습식 초지 공정에 의해 웹을 형성하는 단계;
상기 형성된 웹을 열처리 및 건조시켜 복합재 시트를 제조하는 단계;
상기 복합재 시트를 적어도 2장 적층한 뒤, 프레스 성형하여 복합재 예비성형 보드를 제조하는 단계;
상기 복합재 예비성형 보드의 양면에 피복층을 적층시키는 단계;
상기 양면에 피복층이 적층된 복합재 예비성형 보드를 승온하여 팽창시키는 단계; 및
상기 팽창된, 양면에 피복층이 적층된 복합재 예비성형 보드에 대하여 몰드 프레싱을 수행하여 몰드 성형된 차량용 언더바디 커버를 제조하는 단계;
를 포함하고,
상기 강화 섬유는 무기 섬유 또는 유기 섬유이고,
상기 이성분 폴리머 섬유는 코어(core)부와 시스(sheath)부를 포함하고,
상기 코어부는 제1 열가소성 수지를 포함하고, 상기 시스부는 제2 열가소성 수지를 포함하고,
상기 제1 열가소성 수지의 융점이 상기 제2 열가소성 수지의 융점보다 높고,
상기 강화 섬유와 상기 이성분 폴리머 성분의 중량비가 20 : 80 내지 60 : 40 이고,
상기 이성분 폴리머 섬유의 코어부의 비중이 1보다 큰
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 몰드 성형된 차량용 언더바디 커버는 중심층, 및 상기 중심층의 양면에 배치된 피복층;을 포함하는
차량용 언더바디 커버의 제조 방법.
- 삭제
- 삭제
- 제21항에 있어서,
상기 산 수용액 1L당 상기 강화 섬유 및 상기 이성분 폴리머 섬유의 총 함량이 0.1 g 내지 10 g이 되게 혼합하는
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 형성된 웹을 열처리 및 건조시키는 단계는 100 내지 180℃에서 수행하는
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 복합재 시트는 상기 복합재 시트 내 두께 편차가 2 mm 이하인
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 프레스 성형은 100 내지 180℃의 온도에서 1 내지 30bar 의 압력을 가하여 상기 복합재 시트를 열프레스 성형하여 복합재 예비성형 보드를 제조하는
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 복합재 예비성형 보드의 밀도가 0.2 g/cm3 내지 1.6 g/cm3 인
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 복합재 예비성형 보드는 기공률이 5 내지 80 부피%인
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 복합재 예비성형 보드는 상기 복합재 예비성형 보드 내 임의의 2 지점에서 측정한 ASTM D3763에 의한 충격 강도의 차이가 0.2 J/mm 이하인
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 양면에 피복층이 적층된 복합재 예비성형 보드를 140 내지 240℃의 온도로 승온하여 팽창시키는
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 양면에 피복층이 적층된 복합재 예비성형 보드 승온하여 초기 부피 대비 200 내지 600 부피% 팽창시키는
차량용 언더바디 커버의 제조 방법.
- 제21항에 있어서,
상기 팽창된, 양면에 피복층이 적층된 복합재 예비성형 보드에 대하여 5 내지 100℃의 온도에서 1bar 내지 100bar의 압력을 가하여 몰드 프레싱을 수행하는
차량용 언더바디 커버의 제조 방법.
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KR102140509B1 (ko) * | 2017-03-02 | 2020-08-03 | (주)엘지하우시스 | 차량용 언더바디 커버 및 이를 제조하는 방법 |
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CN113430722A (zh) * | 2021-08-10 | 2021-09-24 | 扬州阿特兰新材料有限公司 | 便于直接成型加工的无纺布及其生产方法与用途 |
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TWI701135B (zh) | 2020-08-11 |
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CN113306502A (zh) | 2021-08-27 |
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