KR101425039B1 - 발포성형방법, 발포제 및 발포 플라스틱 - Google Patents
발포성형방법, 발포제 및 발포 플라스틱 Download PDFInfo
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- KR101425039B1 KR101425039B1 KR20130009294A KR20130009294A KR101425039B1 KR 101425039 B1 KR101425039 B1 KR 101425039B1 KR 20130009294 A KR20130009294 A KR 20130009294A KR 20130009294 A KR20130009294 A KR 20130009294A KR 101425039 B1 KR101425039 B1 KR 101425039B1
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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Abstract
Description
도 2는 본 발명의 일 실시예에 따른 발포성형방법을 도시한 것이다.
도 3은 도 1에 도시된 스크류의 다른 실시예를 도시한 것이다.
도 4는 이산화탄소의 상선도(phase diagram)를 도시한 것이다.
도 5는 온도와 압력에 따라 용융수지에 용해된 기체의 농도를 도시한 그래프이다
Claims (23)
- 배럴 내에 구비된 스크류를 회전시키는 (a)단계;
입자 또는 분말 상태의 원재와 함께 화학적 반응을 통해 기포를 생성하는 발포제를 상기 배럴 내로 투입하는 (b)단계;
상기 (b)단계에서 투입된 원재가 용융되고, 상기 발포제로부터 기체가 생성되는 (c)단계;
상기 (c)단계에서 생성된 기체가 상기 배럴을 따라 진행되는 중에 상기 스크류에 의해 가압되는 (d)단계; 및
상기 가압된 기체가 초임계 유체로 상변화되고, 상기 용융된 원재와 혼합되는 (e)단계를 포함하는 발포성형방법. - 제 1 항에 있어서,
상기 (e)단계에서는,
상기 (c)단계에서 기체가 생성되고 남은 상기 발포제의 잔사물이 분해되며 상기 기체를 더 생성하는 발포성형방법. - 제 2 항에 있어서,
상기 (e)단계에서 상기 배럴 내의 온도는 상기 (c)단계에서보다 높은 발포성형방법. - 제 1 항에 있어서,
상기 발포제는,
열반응에 의해 기체를 생성하는 발포 화합물; 및
내측으로 상기 발포 화합물이 수용되는 공간을 형성하는 셀을 포함하고,
상기 (c)단계에서 상기 배럴 내부의 온도는 상기 셀의 용융점보다 높은 발포성형방법. - 제 1 항에 있어서,
상기 (c)단계에서는 상기 스크류의 회전에 따라 상기 원재와 발포제의 혼합물이 진행되는 중에 상기 배럴과 스크류 사이에서 점점 가압되는 발포성형방법. - 제 1 항에 있어서,
상기 발포제는 중탄산수소나트륨(NaHCO3)을 포함하는 발포성형방법. - 스크류가 회전되는 중에 배럴 내의 제 1 구간에 입자 또는 분말 상태의 원재와 함께 발포제가 공급되는 (a)단계;
상기 스크류 회전에 따라 원재와 함께 발포제가 상기 배럴을 따라 진행하는 중의 제 2 구간에서, 상기 원재의 용융이 이루어지고 상기 발포제로부터 기체가 생성되며, 상기 생성된 기체가 상기 스크류에 의해 가압되어 상기 기체의 압력이 임계 압력을 향해 점점 상승되는 (b)단계; 및
상기 제 2 구간 이후의 제 3 구간에서, 상기 (b)단계에서 가압된 기체의 압력이 상기 임계 압력 이상으로 상승되어 초임계 유체로 상변화되는 (c)단계를 포함하는 발포성형방법. - 삭제
- 제 7 항에 있어서,
상기 제 2 구간에서는 상기 제 1 구간에 비해 상기 원재와 발포제의 혼합물에 가해지는 압력이 증가되는 발포성형방법. - 제 7 항에 있어서,
상기 제 3 구간에서 상기 배럴 내의 온도는 상기 제 2 구간에서 상기 발포제로부터 기체가 생성되는 온도보다 높은 발포성형방법. - 제 7 항에 있어서,
상기 발포제는 중탄산수소 나트륨을 포함하고,
상기 제 2 구간에서는 상기 중탄산수소나트륨의 열분해 잔사물인 탄산나트륨(Na2CO3)이 생성되고, 상기 제 3 구간에서는 상기 탄산나트륨의 열분해 잔사물인 산화나트륨(Na2O)이 생성되는 발포성형방법. - 제 11 항에 있어서,
상기 제 2 구간에서의 온도는 180 내지 220도(℃)이고,
상기 제 3 구간에서의 온도는 200 내지 240도(℃)인 발포성형방법. - 제 7 항에 있어서,
상기 발포제는,
열반응에 의해 기체를 생성하는 발포 화합물; 및
내측으로 상기 발포 화합물이 수용되는 공간을 형성하는 셀을 포함하고,
상기 제 2 구간에서의 온도는 상기 셀의 용융점 이상인 발포성형방법. - 제 13 항에 있어서,
상기 제 1 구간에서는 상기 셀은 미용융 상태인 발포성형방법. - 제 7 항에 있어서,
상기 제 3 구간에서는,
상기 제 2 구간에서 기체를 생성하고 남은 상기 발포제의 잔사물로부터 기체가 더 생성되는 발포성형방법. - 발포 성형될 플라스틱 원재가 용융되는 중에 기체를 생성하여 발포 플라스틱을 형성시키는 발포제에 있어서,
상기 발포제는,
입자 또는 분말상의 발포 화합물; 및
내측으로 상기 발포 화합물이 수용되는 공간을 형성하고, 상기 원재의 용융과정에서 분해되는 셀을 포함하는 발포제. - 제 16 항에 있어서,
상기 발포 화합물은 중탄산수소나트륨을 포함하는 발포제. - 제 16 항에 있어서,
상기 셀은 LDPE, PE 및 PP 중 적어도 하나를 포함하는 발포제. - 제 16 항에 있어서,
상기 발포제는 상기 발포 화합물의 반응 활성을 위한 촉매를 더 포함하는 발포제. - 제 19 항에 있어서,
상기 촉매는 시트르산인 발포제. - 화학 발포제와 혼합된 원재가 투입되는 배럴;
상기 화학 발포제와 혼합된 원재가 용융되도록 상기 배럴 내부를 가열하는 히터; 및
상기 배럴 내에서 회전하며, 상기 화학 발포제와 혼합된 원재를 상기 배럴을 따라 이송시키는 스크류를 포함하고,
상기 원재의 이동방향을 따라 상기 스크류의 축과 상기 배럴의 내주면 사이가 점점 좁아지는 구간이 형성되어, 상기 화학 발포제로부터 생성된 기체가 상기 구간을 통과하며 가압되어 초임계 유체로 상변화되는 사출성형장치. - 제 21 항에 있어서,
상기 구간에서 상기 배럴 내부 온도는 180 내지 220도(℃)인 사출성형장치. - 제 21 항에 있어서,
상기 화학 발포제는 중탄산수소나트륨을 포함하는 사출성형장치.
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KR20130009294A KR101425039B1 (ko) | 2013-01-28 | 2013-01-28 | 발포성형방법, 발포제 및 발포 플라스틱 |
US14/081,273 US9080023B2 (en) | 2013-01-28 | 2013-11-15 | Foam molding method, foaming agent and foamed plastic |
EP13194686.5A EP2759389B1 (en) | 2013-01-28 | 2013-11-27 | Foam molding method. |
US14/735,689 US20150274917A1 (en) | 2013-01-28 | 2015-06-10 | Foam molding method, foaming agent and foamed plastic |
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KR102103929B1 (ko) | 2019-06-25 | 2020-04-23 | 한국신발피혁연구원 | 미드솔 발포 성형 방법 및 미드솔 발포 성형을 위한 몰딩 인 발포 트랜스퍼 사출 성형기 |
KR102142120B1 (ko) | 2019-07-01 | 2020-08-06 | 한국신발피혁연구원 | 미드솔 발포 성형 방법 및 미드솔 발포 성형을 위한 개량형 몰딩 인 발포 트랜스퍼 사출 성형기 |
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US9080023B2 (en) | 2015-07-14 |
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