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公开(公告)号：US12023900B2
公开(公告)日：2024-07-02
申请号：US18353922
申请日：2023-07-18
发明人： Jae Myoung Son , Byoung Cheon Jo , Joo Hyun Nam , Eun Jung Baek
CPC分类号： B32B27/32 , B32B27/08 , B32B2250/03 , B32B2250/05 , B32B2250/242 , B32B2272/00 , B32B2307/51 , B32B2307/5825 , B32B2307/7244 , B32B2323/043 , B32B2323/046 , B32B2439/06 , B32B2439/62 , B32B2439/70
摘要： The present disclosure relates to a recyclable polyethylene-based laminated packaging material with openability and a method of manufacturing the same including a multi-layered polyethylene film C in which a surface layer A and a sealant layer B are bonded to each other. The sealant layer B is a layer in which a polyolefin plastomer layer b1, a mixed resin layer b2 obtained by mixing a high-density polyethylene resin and a low-density polyethylene resin, and a composition layer b3 containing a resin composition obtained by mixing medium-density polyethylene and low-density polyethylene are sequentially laminated. Also disclosed is a method of manufacturing the same.
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公开(公告)号：US20240174795A1
公开(公告)日：2024-05-30
申请号：US18448370
申请日：2023-08-11
发明人： Do Young Kim , Hyun Sik Yang , Yu Hyun Kim , Ki Yup Kim , Joo Hyun Nam , Chul Soon Moon , Ji Hae Park , Sung Won Lee , Jun Haeng Lee , Ho Seung Lee
IPC分类号： C08G63/183 , C08G63/52 , C08G63/78
CPC分类号： C08G63/183 , C08G63/52 , C08G63/785 , C08G2230/00
摘要： Provided are a biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and high viscosity which has a carboxyl end group (CEG) content of 15 mg KOH/g or less, a ratio (Mz/Mn) of a z-average molecular weight (Mz) to a number average molecular weight (Mn) of 3 to 15, and a melt index (MI) of 5 g/10 min or less as measured under conditions of a temperature of 190° C. and a load of 2.16 kg in accordance with ASTM D 1238. A method of preparing a biodegradable aliphatic-aromatic polyester copolymer is provided, including adding a chain extender and an anti-hydrolysis agent to an aliphatic-aromatic polyester pre-copolymer over time, whereby a significant viscosity rise and improvement of hydrolysis resistance may be implemented simultaneously.
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公开(公告)号：US11987667B1
公开(公告)日：2024-05-21
申请号：US18448370
申请日：2023-08-11
发明人： Do Young Kim , Hyun Sik Yang , Yu Hyun Kim , Ki Yup Kim , Joo Hyun Nam , Chul Soon Moon , Ji Hae Park , Sung Won Lee , Jun Haeng Lee , Ho Seung Lee
IPC分类号： C08G63/52 , C08G63/183 , C08G63/78
CPC分类号： C08G63/183 , C08G63/52 , C08G63/785 , C08G2230/00
摘要： Provided are a biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and high viscosity which has a carboxyl end group (CEG) content of 15 mg KOH/g or less, a ratio (Mz/Mn) of a z-average molecular weight (Mz) to a number average molecular weight (Mn) of 3 to 15, and a melt index (MI) of 5 g/10 min or less as measured under conditions of a temperature of 190° C. and a load of 2.16 kg in accordance with ASTM D 1238. A method of preparing a biodegradable aliphatic-aromatic polyester copolymer is provided, including adding a chain extender and an anti-hydrolysis agent to an aliphatic-aromatic polyester pre-copolymer over time, whereby a significant viscosity rise and improvement of hydrolysis resistance may be implemented simultaneously.
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4.发明公开公开(公告)号：US20240034036A1
公开(公告)日：2024-02-01
申请号：US18353922
申请日：2023-07-18
发明人： Jae Myoung Son , Byoung Cheon Jo , Joo Hyun Nam , Eun Jung Baek
CPC分类号： B32B27/32 , B32B27/08 , B32B2250/03 , B32B2250/05 , B32B2250/242 , B32B2323/043 , B32B2323/046 , B32B2307/51 , B32B2307/5825 , B32B2307/7244 , B32B2439/70 , B32B2439/62 , B32B2439/06 , B32B2272/00
摘要： The present disclosure relates to a recyclable polyethylene-based laminated packaging material with openability and a method of manufacturing the same including a multi-layered polyethylene film C in which a surface layer A and a sealant layer B are bonded to each other. The sealant layer B is a layer in which a polyolefin plastomer layer b1, a mixed resin layer b2 obtained by mixing a high-density polyethylene resin and a low-density polyethylene resin, and a composition layer b3 containing a resin composition obtained by mixing medium-density polyethylene and low-density polyethylene are sequentially laminated. Also disclosed is a method of manufacturing the same.
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