公开(公告)号：EP0828783B1

公开(公告)日：2002-08-21

申请号：EP96916738.6

申请日：1996-05-29

申请人： Landec Corporation

发明人： CLARKE, Raymond ,  STEWART, Ray, F. ,  YOON, Valentine, Y. ,  SCHULTZ, Donald ,  McCLARY, Bradley

IPC分类号： C08J9/36 ,  B65D81/24

CPC分类号： B32B5/18 ,  B65D81/2069 ,  B65D85/34 ,  B65D2565/388 ,  C08J5/2275 ,  C08J9/36 ,  C08J2333/12 ,  Y10T428/1321 ,  Y10T428/1334 ,  Y10T428/1352 ,  Y10T428/24322 ,  Y10T428/249978 ,  Y10T428/24998 ,  Y10T428/259 ,  Y10T428/31663 ,  Y10T428/31855 ,  Y10T428/31928 ,  Y10T428/31935

摘要： Novel gas-permeable membranes which are particularly useful in the packaging of fresh cut fruit and vegetables, and other respiring biological materials. The membranes have an O2 permeability of at least 775,000 ml/m .atm.24hrs, a P10 ratio of at least 1.3, and a ratio of CO2 permeability to O2 permeability (R) of at least 1.5, and are made by forming thin polymeric coatings on microporous polymeric films. Preferred coating polymers are side chain crystalline polymers. Preferred microporous films contain inorganic fillers, particularly such films based on ultrahigh molecular weight polyethylene or polypropylene. Figure (1) illustrates how O2 permeability and R ratio vary for different coating polymers and microporous films.

公开(公告)号：EP0828783A1

公开(公告)日：1998-03-18

申请号：EP96916738.0

申请日：1996-05-29

申请人： Landec Corporation

发明人： CLARK, Raymond ,  STEWART, Ray, F. ,  YOON, Valentine, Y. ,  SCHULTZ, Donald ,  McCLARY, Bradley

IPC分类号： C08J9 ,  B32B5 ,  B65D81 ,  B65D85 ,  C08J5 ,  C08L101 ,  C09D201

CPC分类号： B32B5/18 ,  B65D81/2069 ,  B65D85/34 ,  B65D2565/388 ,  C08J5/2275 ,  C08J9/36 ,  C08J2333/12 ,  Y10T428/1321 ,  Y10T428/1334 ,  Y10T428/1352 ,  Y10T428/24322 ,  Y10T428/249978 ,  Y10T428/24998 ,  Y10T428/259 ,  Y10T428/31663 ,  Y10T428/31855 ,  Y10T428/31928 ,  Y10T428/31935

摘要： Novel gas-permeable membranes which are particularly useful in the packaging of fresh cut fruit and vegetables, and other respiring biological materials. The membranes have an O2 permeability of at least 775,000 ml/m2.atm.24hrs, a P¿10? ratio of at least 1.3, and a ratio of CO2 permeability to O2 permeability (R) of at least 1.5, and are made by forming thin polymeric coatings on microporous polymeric films. Preferred coating polymers are side chain crystalline polymers. Preferred microporous films contain inorganic fillers, particularly such films based on ultrahigh molecular weight polyethylene or polypropylene. Figure (1) illustrates how O2 permeability and R ratio vary for different coating polymers and microporous films.