KR101195209B1 - 인체무해 및 재활용이 용이한 종이용기용 친환경 코팅지 및 그 제조방법 - Google Patents
인체무해 및 재활용이 용이한 종이용기용 친환경 코팅지 및 그 제조방법 Download PDFInfo
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Abstract
또한, 본 발명의 인체무해 및 생분해성 코팅액은 열처리 건조 상태에서는 3~7일 동안 내수 및 내유성을 유지하지만, 재활용시 물 또는 알칼리 용액중에서 함께 교반하면서 해리할 경우, 기계적 교반처리에 의해 생분해 코팅층 및 종이층이 신속하게 해리되므로 용이하게 재활용할 수 있으며, 자연환경에서 생분해되어 자연으로 돌아간다.
Description
도 2는 본 발명의 코팅액을 적용하여 제조한 원터치컵의 예이다.
코팅액 구분 | PVA 코팅제 (중량부) | 아크릴 에멀젼 (중량부) |
1 | 900 | 100 |
2 | 750 | 250 |
3 | 500 | 500 |
4 | 250 | 750 |
5 | 100 | 900 |
구분 | 내수성 | 내유성 | 열실링성 |
코팅지 1 | |||
코팅지 2 | |||
코팅지 3 | |||
코팅지 4 | |||
코팅지 5 |
구분 | 판정 내용 | 결과 |
건조시킨 펄프에 불순물 포함여부 육안 확인 | 고무, 합성수지 덩어리, 펄프이외에 불순물 여부 | 없음 |
건조시킨 펄프표면의 펄프 점착성 여부 | 손 또는 거름종이로 눌러 점착성 여부 확인 | 점착성 없음 |
항 목 | 단위 | 규 격 | 결 과 | ||
재질 시험 |
납(Pb) | mg/kg | 100이하 (합계로서) |
불검출(검출한계 1) | |
카드뮴(Cd) | 불검출(검출한계 1) | ||||
수은(Hg) | 불검출(검출한계 0.1) | ||||
6가크롬(Cr 6+) | 불검출(검출한계 1) | ||||
용출 시험 |
중금속: 납으로서 | mg/L | 1.0 이하 | 1.0이하 | |
과망간산칼륨소비량 | 10 이하 | 1 | |||
증발 잔류물 |
4%초산으로 | 30 이하 | 9 | ||
물로 | |||||
30 이하 | 4 | ||||
n-헵탄으로 | |||||
150 이하 | 8 | ||||
20%에탄올로 | |||||
30 이하 | 3 |
Claims (4)
- (A) 교반기, 온도계, 투입구, 냉각기가 설치된 반응용기에 PVA 코팅액 100 중량부에 대하여 물 70~95 중량부, PVA(폴리비닐알콜, Poly vinyl alcohol) 5~30 중량부를 투입하고, 300~800 rpm으로 교반하면서 80~100℃에서 가온용해 시키는 단계;
(B) PVA 코팅액 100 중량부에 대하여 붕산 0.1~0.6 중량부 및 IPA(이소프로필알콜, Iso propyl alcohol) 0.35~1.0 중량부를 추가 투입하고 80 내지 100℃로 항온을 유지하면서, 48~240시간 동안, 300 내지 800 RPM으로 교반하며 더욱 용해시키는 추가 용해단계;
(C) 히터를 끄고, 상온 또는 냉각기에 4℃~상온의 냉각수를 투입하면서, 2~8시간 동안 40~100 RPM의 속도로 서서히 교반하면서 상온으로 냉각하는 숙성단계를 통하여 PVA 코팅액을 수득하는 단계;
(D) 교반기, 온도계, 투입구, 냉각기가 설치된 반응용기에 아크릴 에멀젼 100 중량부에 대하여 단량체 40~70 중량부, 유화제 0.5~2.0 중량부, 암모늄퍼설페이트(Ammonium persulfate) 0.1~1.5 중량부, 구연산 0.1~1.0 중량부 및 물 40~70 중량부 투입하고 40~100 RPM으로 교반하면서 70~100℃로 가온하여 용해시키는 용해 단계;
(E) 40 내지 100 RPM으로 교반하면서 서서히 가온하여 70~100℃에서, 120~300분간 유지하여 반응시키는 반응단계;
(F) 히터를 끄고, 상온 또는 냉각기에 4℃~상온의 냉각수를 투입하면서, 40~100 RPM으로 교반하면서 상온에서 반응을 종결된 아크릴 에멀젼을 수득하는 단계;
(G) 상기에서 수득한 PVA 코팅제 10~90 중량부와 아크릴 에멀젼 90~10중량부를 혼합하여 전체 비율 100 중량부로 한 다음, 상온에서 혼합하여 최종 코팅액을 제조하는 단계;를 포함하는 것을 특징으로 하는 인체무해 및 재활용이 용이한 종이용기용 친환경 코팅지의 제조 방법 - 제1항에 있어서, 상기 단량체는 메타크릴산메틸(Methyl methacrylate, MMA), 에틸 아크릴레이트 모노머(Ethyl acrylate monomer, EAM), 부틸 아크릴레이트 모노머(Butyl acrylate monomer, BAM), 스티렌 모노머(Styrene monomer, SM), 아크릴산(Acrylic acid, AAc)중 어느 하나 이상인 것을 특징으로 하는 인체무해 및 재활용이 용이한 종이용기용 친환경 코팅지의 제조 방법
- 제1항에 있어서, 상기 유화제는 글리세린지방산에스테르(Glyerin fatty acid ester), 슈크로오스지방산에스테르(Sucrose fatty acid ester), 프로필렌지방산에스테르(Propylene fatty acid ester), 노닐페놀에테르설페이트(Nonyl phenol ether sulfate)중 어느 하나 이상인 것을 특징으로 하는 인체무해 및 재활용이 용이한 종이용기용 친환경 코팅지의 제조 방법
- 제1항 내지 제3항 중 어느 한 항의 방법으로 제조되는 인체무해 및 재활용이 용이한 종이용기용 친환경 코팅지
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