장정식 최철림 2024-01-12T13:31:33Z 2024-01-12T13:31:33Z 1993-06-22 https://pubs.kist.re.kr/handle/201004/87912 폴리에틸렌섬유/에폭시　수지　복합재 의　접착력　증진방법 Patent 1993-06-22 1991-02-01 5,221,432 07/649,052 US 특허 한국과학기술연구원